:root {
    --move-inaccuracy: #e8b431;
    --move-mistake: #ef883c;
    --move-blunder: #cb354c;
    --move-good: #258351;
    --cos-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    font-family: var(--cos-font);
}

* { box-sizing: border-box; }
html, body, #app, .mud-typography, .mud-button-root, .mud-input, .mud-nav-link, .mud-chip, .mud-alert {
    font-family: var(--cos-font) !important;
}
html, body { margin: 0; min-height: 100%; }
body { min-height: 100vh; color: var(--mud-palette-text-primary, #f4f5f7); background: var(--mud-palette-background, #020617); }
a { color: inherit; }

/* MudBlazor parks closed popovers at left:-9999px. In Firefox RTL this
   creates a 10,000px scroll area; keep the closed anchor inside the viewport.
   Open popovers retain their measured position and normal interaction. */
html[dir="rtl"] .mud-popover:not(.mud-popover-open) { left: 0; }

.app-shell { min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }
.site-header, footer {
    display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
    padding: 1rem clamp(1rem, 5vw, 4rem); border-bottom: 1px solid #ffffff18;
}
footer { border: 0; border-top: 1px solid #ffffff18; color: #a9afbb; }
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; }
.brand span { color: #f49a2f; font-size: 1.8rem; }
.site-header nav, .app-shell nav { display: flex; gap: 1rem; }
.link-button { border: 0; padding: 0; background: transparent; color: inherit; font: inherit; text-decoration: underline; cursor: pointer; }

.landing-shell, .status-page { width: min(1100px, calc(100% - 2rem)); margin: auto; padding: 4rem 0; }
.hero { max-width: 760px; }
.hero h1, .status-page h1 { margin: .3rem 0 1rem; font-size: clamp(2.5rem, 8vw, 5.5rem); line-height: .98; }
.hero p:not(.eyebrow), .status-page p { color: #bdc2cc; font-size: 1.12rem; line-height: 1.7; }
.eyebrow { color: #f49a2f; font-weight: 800; letter-spacing: .18em; font-size: .78rem; }
.primary-action, .maintenance-card button {
    display: inline-flex; margin-top: 1rem; padding: .85rem 1.3rem; border: 1px solid #f49a2f;
    border-radius: 999px; background: #f49a2f; color: #181008; font-weight: 800; text-decoration: none;
}
.secondary-action { display: inline-flex; margin-top: 1rem; padding: .85rem 1.3rem; color: #f4f5f7; font-weight: 800; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; }
.app-loading { position: relative; width: 100%; min-height: 100vh; overflow: hidden; color: #f8fafc; background: #020617; }
.app-loading-bar { position: absolute; inset: 0 0 auto; z-index: 2; display: flex; height: 64px; align-items: center; gap: 1rem; padding: 0 1rem; border-bottom: 1px solid #ffffff12; background: #020617; box-shadow: 0 2px 10px #0003; }
.app-loading-bar > strong { font-size: 1.05rem; }
.app-loading-menu { display: grid; width: 28px; gap: 3px; padding: 5px; }
.app-loading-menu i { display: block; width: 17px; height: 2px; border-radius: 2px; background: #cbd5e1; }
.app-loading-language { display: flex; align-items: center; gap: .4rem; margin-left: auto; padding: .45rem .65rem; border: 1px solid #ffffff30; border-radius: 10px; color: #cbd5e1; font-size: .75rem; }
.app-loading-language img { width: 21px; height: 15px; border-radius: 2px; object-fit: cover; }
.app-loading-drawer { position: absolute; inset: 64px auto 0 0; width: 280px; padding: 1.3rem .9rem; border-right: 1px solid #ffffff12; background: #0f172a; }
.app-loading-drawer small { display: block; margin: 0 .7rem .8rem; color: #60a5fa; font-size: .65rem; font-weight: 800; letter-spacing: .12em; }
.app-loading-drawer > i { display: block; width: 76%; height: 11px; margin: 1rem .7rem; border-radius: 4px; background: #ffffff10; }
.app-loading-drawer > i:nth-of-type(2) { width: 62%; } .app-loading-drawer > i:nth-of-type(3) { width: 71%; }
.app-loading-drawer > span { display: block; height: 1px; margin: 1.3rem -.9rem .7rem; background: #ffffff12; }
.app-loading-drawer > div { display: flex; align-items: center; gap: .55rem; padding: .65rem .7rem; border: 1px solid #f59e0b40; border-radius: 10px; color: #e2e8f0; font-size: .72rem; }
.app-loading-drawer img { width: 28px; height: 28px; object-fit: contain; } .app-loading-drawer strong { color: #f59e0b; }
.app-loading-card { position: absolute; top: 50%; left: calc(50% + 140px); width: min(440px, calc(100% - 2rem)); padding: 2.1rem; border: 1px solid #ffffff1f; border-radius: 18px; background: #111827e8; box-shadow: 0 24px 70px #0008; text-align: center; transform: translate(-50%, -50%); }
.app-loading-mark { position: relative; width: 92px; height: 92px; margin: 0 auto 1rem; }
.app-loading-mark img { width: 100%; height: 100%; object-fit: contain; filter: drop-shadow(0 12px 20px #0008); animation: app-loading-float 1.8s ease-in-out infinite; }
.app-loading-mark span { position: absolute; inset: -8px; z-index: -1; border: 2px solid #60a5fa55; border-right-color: #a78bfa; border-radius: 50%; animation: app-loading-spin 1.2s linear infinite; }
.app-loading-card p { margin: 0 0 .5rem; color: #60a5fa; font-size: .68rem; font-weight: 900; letter-spacing: .14em; }
.app-loading-card h1 { margin: 0 0 1.4rem; font-size: clamp(1.45rem, 4vw, 2rem); }
.app-loading-card small { color: #94a3b8; }
.app-loading-progress { height: 6px; margin: 0 0 .9rem; overflow: hidden; border-radius: 99px; background: #020617; }
.app-loading-progress span { display: block; width: 42%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #2563eb, #a78bfa); animation: app-loading-slide 1.35s ease-in-out infinite; }
@keyframes app-loading-spin { to { transform: rotate(360deg); } }
@keyframes app-loading-float { 50% { transform: translateY(-4px); } }
@keyframes app-loading-slide { from { transform: translateX(-110%); } to { transform: translateX(340%); } }
@media (max-width: 900px) { .app-loading-drawer { display: none; } .app-loading-card { left: 50%; } }
@media (max-width: 560px) { .app-loading-bar { padding-inline: .7rem; } .app-loading-language { width: 42px; justify-content: center; overflow: hidden; white-space: nowrap; } .app-loading-language img { flex: none; } .app-loading-card { padding: 1.6rem; } }
@media (prefers-reduced-motion: reduce) { .app-loading-mark img, .app-loading-mark span, .app-loading-progress span { animation: none; } .app-loading-progress span { width: 65%; } }

.account-shell { width: min(680px, calc(100% - 2rem)); margin: auto; padding: clamp(1rem, 4vw, 3rem) 0; }
.account-card { display: grid; gap: 1rem; padding: clamp(1.2rem, 4vw, 2.4rem); border: 1px solid #ffffff20; border-radius: 1.2rem; background: #10141ddd; box-shadow: 0 .6rem 2rem #0002; }
.account-card h1 { margin: 0; font-size: clamp(1.55rem, 5vw, 2.4rem); line-height: 1.2; }
.account-card h2 { margin-bottom: 0; }
.account-card > p { color: var(--mud-palette-text-secondary, #bdc2cc); line-height: 1.6; }
.account-card label:not(.check-row) { display: grid; gap: .45rem; color: #dfe2e8; font-weight: 700; }
.account-card label span, .field-help { color: #969daa; font-size: .88rem; font-weight: 400; }
.account-card input, .account-card textarea, .account-card select { width: 100%; border: 1px solid #ffffff2d; border-radius: .65rem; background: #07090e; color: #f4f5f7; padding: .78rem .9rem; font: inherit; }
.account-card input:focus, .account-card textarea:focus, .account-card select:focus { outline: 2px solid #f49a2f; outline-offset: 2px; }
.account-card .primary-action { justify-self: start; cursor: pointer; font: inherit; }
.account-card .primary-action:disabled { cursor: not-allowed; opacity: .55; }
.recovery-secret-backdrop { position: fixed; inset: 0; z-index: 1500; display: grid; place-items: center; padding: 1rem; background: #020617dc; backdrop-filter: blur(8px); }
.recovery-secret-dialog { display: grid; width: min(620px, 100%); max-height: calc(100dvh - 2rem); overflow-y: auto; gap: 1rem; padding: clamp(1.4rem, 4vw, 2.5rem); border: 1px solid var(--mud-palette-lines-default); border-radius: 24px; color: var(--mud-palette-text-primary); background: var(--mud-palette-surface); box-shadow: 0 28px 90px #000b; }
.recovery-secret-dialog h2, .recovery-secret-dialog p { margin: 0; }
.recovery-secret-dialog > p:not(.eyebrow) { color: var(--mud-palette-text-secondary); line-height: 1.65; }
.recovery-secret-icon { display: grid; width: 58px; height: 58px; place-items: center; border-radius: 18px; color: #fff; background: linear-gradient(145deg, #f97316, #ea580c); box-shadow: 0 12px 28px #f9731647; }
.recovery-secret-value { display: block; padding: 1.2rem; overflow-wrap: anywhere; border: 1px dashed #fb923c99; border-radius: 16px; color: #fed7aa; background: #020617; font-size: clamp(.85rem, 2.2vw, 1.05rem); line-height: 1.8; text-align: center; user-select: all; }
.recovery-secret-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.recovery-secret-confirmation { padding: .9rem 1rem; border-radius: 14px; background: #ffffff08; }
.security-page { display: grid; width: min(1180px, 100%); gap: 1.5rem; margin: 0 auto; padding: 2rem 0 5rem; }
.security-hero { display: flex; align-items: center; gap: 1.25rem; padding: clamp(1.5rem, 4vw, 2.5rem); overflow: hidden; border: 1px solid #ffffff1c; border-radius: 24px; background: radial-gradient(circle at 90% 15%, #f9731628, transparent 32%), linear-gradient(135deg, #172554, #312e81 55%, #6b3b6b); }
.security-hero > span { display: grid; width: 64px; height: 64px; flex: 0 0 auto; place-items: center; border: 1px solid #ffffff2b; border-radius: 18px; background: #ffffff14; }
.security-hero h1 { margin: .15rem 0 .35rem; font-size: clamp(2.2rem, 5vw, 3.6rem); }
.security-hero p { margin: 0; }
.security-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; align-items: start; }
.security-card { display: grid; min-width: 0; gap: 1.25rem; padding: clamp(1.3rem, 3vw, 2rem); border: 1px solid var(--mud-palette-lines-default); border-radius: 22px; background: var(--mud-palette-surface); box-shadow: 0 16px 42px #0206171f; }
.security-card p, .security-card h2, .security-card h3 { margin: 0; }
.security-card > p, .security-recovery-action > p { color: var(--mud-palette-text-secondary); line-height: 1.65; }
.security-card-heading { display: flex; min-width: 0; align-items: center; gap: 1rem; }
.security-card-heading > div { min-width: 0; flex: 1; }
.security-card-heading .eyebrow { color: var(--mud-palette-primary); font-size: .7rem; }
.security-card-heading h2 { margin-top: .15rem; }
.security-card-icon { display: grid; width: 50px; height: 50px; flex: 0 0 auto; place-items: center; border-radius: 15px; color: #fff; background: #2563eb; }
.security-card-icon.recovery { background: linear-gradient(145deg, #f97316, #ea580c); }
.security-card-icon.devices { background: linear-gradient(145deg, #0891b2, #0f766e); }
.security-card-icon.mfa { background: linear-gradient(145deg, #7c3aed, #a21caf); }
.security-card-icon.danger { background: linear-gradient(145deg, #ef4444, #991b1b); }
.security-status { flex: 0 0 auto; padding: .4rem .7rem; border-radius: 999px; font-size: .75rem; font-weight: 800; }
.security-status.configured { color: #6ee7b7; background: #05966924; }
.security-status.missing { color: #fcd34d; background: #d9770624; }
.security-fields, .security-recovery-action { display: grid; gap: 1rem; }
.security-fields label, .security-recovery-action label, .mfa-card label { display: grid; gap: .45rem; font-weight: 750; }
.security-card input, .security-card textarea { width: 100%; padding: .8rem .9rem; border: 1px solid var(--mud-palette-lines-inputs); border-radius: 12px; color: var(--mud-palette-text-primary); background: color-mix(in srgb, var(--mud-palette-background) 78%, transparent); font: inherit; }
.security-card input:focus, .security-card textarea:focus { outline: 2px solid var(--mud-palette-primary); outline-offset: 2px; }
.security-recovery-action { padding: 1.1rem; border: 1px solid #f9731647; border-radius: 16px; background: #f973160b; }
.security-fact-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.security-fact-list > div { display: flex; gap: .7rem; padding: .9rem; border-radius: 14px; background: color-mix(in srgb, var(--mud-palette-primary) 7%, transparent); }
.security-fact-list i { color: #34d399; }
.security-fact-list span { display: grid; gap: .2rem; }
.security-fact-list small { color: var(--mud-palette-text-secondary); }
.trusted-device-list { display: grid; gap: .8rem; }
.trusted-device-list article { display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; align-items: center; gap: .8rem; padding: .9rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 14px; }
.trusted-device-list article > i { color: var(--mud-palette-primary); }
.trusted-device-list article div { display: grid; }
.trusted-device-list article small { color: var(--mud-palette-text-secondary); }
.trusted-device-list article > span { color: #34d399; font-size: .75rem; font-weight: 800; }
.danger-card { border-color: #ef44444d; }
.security-fields.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.security-message { position: sticky; top: 5rem; z-index: 4; box-shadow: 0 14px 45px #0006; }
.vault-recovery-form { display: grid; min-width: 0; gap: 1rem; margin-block: 1rem; }
.vault-recovery-form h3, .vault-recovery-form p { margin: 0; }
.vault-recovery-form p { color: var(--mud-palette-text-secondary); line-height: 1.6; }
.vault-recovery-hint { font-size: .9rem; }
.vault-recovery-alternative { padding-top: 1rem; border-top: 1px solid var(--mud-palette-lines-default); }
.vault-recovery-alternative summary { padding-block: .75rem; min-height: 44px; cursor: pointer; font-weight: 650; }
.vault-recovery-alternative[open] { display: grid; gap: 1rem; }
.security-page > .mud-container { margin: 0; padding: 0; max-width: 100%; }
.recovery-secret-backdrop > .mud-focus-trap { width: min(620px, 100%); min-width: 0; }
.recovery-secret-actions .mud-button-root, .vault-recovery-form .mud-button-root { min-height: 44px; }
@media (max-width: 850px) { .security-grid, .security-fields.two-columns { grid-template-columns: 1fr; } .security-hero { align-items: flex-start; } }
@media (max-width: 520px) { .security-page { padding-top: 1rem; } .security-hero { align-items: flex-start; flex-direction: column; } .security-card-heading { align-items: flex-start; flex-wrap: wrap; } .security-fact-list { grid-template-columns: 1fr; } }
.signup-password-guidance { display: flex; flex-wrap: wrap; align-items: center; gap: .55rem .8rem; padding: .8rem 1rem; border: 1px solid #6f7f9a55; border-radius: .8rem; background: #182132; }
.signup-password-guidance p { margin: 0; }
.signup-password-recommendation { display: inline-flex; align-items: center; gap: .35rem; padding: .3rem .65rem; border: 1px solid #f49a2f88; border-radius: 999px; background: #f49a2f18; color: #ffc36f; font-size: .78rem; font-weight: 700; }
.signup-password-recommendation strong { color: #fff; font-size: .9rem; }
.check-row { display: flex; align-items: flex-start; gap: .7rem; line-height: 1.5; }
.check-row input { width: auto; margin-top: .25rem; }
.form-message { padding: .8rem 1rem; border-left: 3px solid #f49a2f; background: #f49a2f14; }
.admin-section-nav { display: flex; gap: .6rem; flex-wrap: wrap; position: sticky; top: 0; z-index: 3; padding: .8rem; background: #07090eee; }
.admin-section-nav a { padding: .5rem .7rem; border: 1px solid #ffffff24; border-radius: .5rem; }
.admin-table-wrap { overflow-x: auto; }
.admin-table-wrap table { width: 100%; border-collapse: collapse; }
.admin-table-wrap th, .admin-table-wrap td { padding: .7rem; border-bottom: 1px solid #ffffff1c; text-align: left; vertical-align: top; }
.admin-metrics { display: grid; grid-template-columns: repeat(auto-fit,minmax(15rem,1fr)); gap: .8rem; }
.turnstile-container { min-height: 65px; }
.recovery-codes { columns: 2; margin: 0; padding-left: 1.5rem; }
.recovery-codes li { padding: .25rem; }

.maintenance-active { overflow: auto; }
.maintenance-screen {
    --maintenance-bg: #020617; --maintenance-surface: #0f172a;
    --maintenance-text: #f1f5f9; --maintenance-muted: #94a3b8; --maintenance-line: #334155;
    min-height: 100dvh; display: grid; place-items: center;
    padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
    color: var(--maintenance-text); background: radial-gradient(ellipse at top, #60a5fa14, transparent 65%), var(--maintenance-bg);
}
.maintenance-screen[data-theme="light"] {
    --maintenance-bg: #f1f5f9; --maintenance-surface: #fff;
    --maintenance-text: #0f172a; --maintenance-muted: #475569; --maintenance-line: #cbd5e1;
}
.maintenance-screen[hidden] { display: none; }
.maintenance-card { width: min(600px, 100%); padding: clamp(1.25rem, 4vw, 2.5rem); text-align: center; background: var(--maintenance-surface); border: 1px solid var(--maintenance-line); border-radius: 24px; box-shadow: 0 24px 80px #02061718; }
.maintenance-brand { display: flex; align-items: center; justify-content: center; gap: .65rem; font-weight: 700; }
.maintenance-brand img { width: 38px; height: 38px; object-fit: contain; }
.maintenance-brand strong { color: #f49a2f; }
.maintenance-illustration { display: grid; place-items: center; min-height: 160px; margin-block: 1rem; background:radial-gradient(circle, #f49a2f14, transparent 65%); }
.maintenance-animation { display: block; width: min(160px, 100%); height: 160px; object-fit: contain; }
.maintenance-animation[hidden], .maintenance-fallback[hidden] { display:none; }
.maintenance-fallback { font-size: 8rem; color: #f49a2f; }
.maintenance-card h1 { margin: .75rem 0; font-size: clamp(1.7rem, 5vw, 2.5rem); line-height: 1.15; overflow-wrap: anywhere; }
.maintenance-card > p:not(.eyebrow) { color: var(--maintenance-muted); line-height: 1.65; }
.maintenance-actions { display: grid; justify-items: center; gap: 1rem; margin-top: 1.5rem; }
.maintenance-card button { cursor: pointer; font: inherit; font-weight: 700; min-height: 48px; margin: 0; border-radius: 10px; background: #60a5fa; border-color: #60a5fa; color: #0f172a; }
.maintenance-actions a { display: inline-flex; align-items: center; min-height: 44px; color: var(--maintenance-muted); font-size: .85rem; }
.maintenance-actions :focus-visible { outline: 3px solid #60a5fa; outline-offset: 4px; }

.board-lab { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0 4rem; }
.board-lab h1 { margin-bottom: .4rem; }
.board-lab-intro { color: #bdc2cc; line-height: 1.6; }
.board-lab-grid { display: grid; grid-template-columns: minmax(280px, 680px) minmax(240px, 1fr); gap: 2rem; align-items: start; }
.board-controls { display: grid; gap: 1rem; padding: 1.2rem; border: 1px solid #ffffff20; border-radius: 1rem; background: #10141ddd; }
.board-controls label { display: grid; gap: .35rem; }
.board-controls select, .board-controls input[type="color"] { min-height: 44px; border: 1px solid #ffffff2d; border-radius: .55rem; background: #07090e; color: inherit; padding: .4rem; }
.board-controls label.check-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: .7rem;
    min-height: 44px;
}
.board-controls label.check-row input[type="checkbox"] {
    width: 1.15rem;
    height: 1.15rem;
    margin: 0;
    flex: 0 0 auto;
}
.board-status { min-height: 1.5rem; color: #f4b865; }

.chess-board-shell { --board-light: #f0d9b5; --board-dark: #b58863; position: relative; width: min(100%, 680px); margin-inline: auto; user-select: none; }
.chess-board-shell.fill-container { width: 100%; max-width: none; }
.chess-coordinate-frame { display: grid; grid-template-columns: 24px minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) 24px; width: 100%; aspect-ratio: 1; }
.chess-coordinate-frame.coordinates-hidden { display: block; }
.chess-board { position: relative; display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, minmax(0, 1fr)); width: 100%; aspect-ratio: 1; overflow: hidden; border-radius: .45rem; box-shadow: 0 1rem 3rem #0008; }
.chess-coordinate-frame > .chess-board { grid-column: 2; grid-row: 1; }
.coordinates-hidden > .chess-board { width: 100%; }
.chess-rank-coordinates { grid-column: 1; grid-row: 1; display: grid; grid-template-rows: repeat(8, 1fr); color: #a9afbb; font-size: .72rem; }
.chess-rank-coordinates span { display: grid; place-items: center; }
.chess-file-coordinates { grid-column: 2; grid-row: 2; display: grid; grid-template-columns: repeat(8, 1fr); color: #a9afbb; font-size: .72rem; }
.chess-file-coordinates span { display: grid; place-items: center; }
.chess-square { position: relative; min-width: 0; min-height: 0; border: 0; -webkit-tap-highlight-color: transparent; }
.chess-square.light { background: var(--board-light); }
.chess-square.dark { background: var(--board-dark); }
.board-palette-green { --board-light: #eeeed2; --board-dark: #769656; }
.board-palette-blue { --board-light: #dee5ea; --board-dark: #7f9db2; }
.board-palette-contrast { --board-light: #f4f1e8; --board-dark: #596579; }
.chess-square.selected { box-shadow: inset 0 0 0 .28rem #f49a2fcc; z-index: 2; }
.chess-square.legal-target::after { content: ""; position: absolute; inset: 37%; border-radius: 50%; background: #1c1f26a6; }
.chess-square.last-move { box-shadow: inset 0 0 0 999px #f6e05e55; }
.chess-square.markup-origin { box-shadow: inset 0 0 0 .28rem #22c55ecc; }
.chess-square:focus-visible { outline: .22rem solid #fff; outline-offset: -.22rem; z-index: 4; }

.chess-piece-layer, .chess-board-markup-layer { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none !important; }
.chess-piece-layer *, .chess-board-markup-layer * { pointer-events: none !important; }
.chess-board-markup-layer { z-index: 4; }
.chess-piece-layer { z-index: 3; }
.chess-piece-token { position: absolute; top: 0; left: 0; width: 12.5%; height: 12.5%; display: grid; place-items: center; transition: transform 220ms cubic-bezier(.2,.8,.2,1), opacity 160ms ease; will-change: transform; }
.chess-piece-token img { width: 88%; height: 88%; object-fit: contain; filter: drop-shadow(0 .06rem .08rem #0005); pointer-events: none; }
.chess-piece-token.appearing { opacity: 0; }
.chess-piece-token.removing { opacity: 0; }
.chess-piece-token.dragging { z-index: 10; transition: none; filter: drop-shadow(0 .7rem .8rem #0008); }
.chess-board.can-drag { touch-action: pan-y; }
.chess-board.can-drag:not(.is-dragging) .chess-square[data-has-piece="true"] { touch-action: none; cursor: grab; }
.chess-board.is-dragging, html.chess-drag-active { cursor: grabbing; overscroll-behavior: none; }
.chess-board.markup-mode .chess-square { touch-action: manipulation; cursor: crosshair; }

.chess-move-annotation { position: absolute; z-index: 6; width: 12.5%; height: 12.5%; display: grid; place-items: start end; padding: 2%; pointer-events: none; color: #fff; text-shadow: 0 1px 2px #000; }
.chess-move-annotation strong { display: grid; place-items: center; min-width: 1.55rem; min-height: 1.55rem; border-radius: 999px; background: #334155e6; }
.chess-move-annotation.annotation-brilliant, .chess-move-annotation.annotation-good { color: #a7f3d0; }
.chess-move-annotation.annotation-interesting, .chess-move-annotation.annotation-dubious { color: #fde68a; }
.chess-move-annotation.annotation-mistake, .chess-move-annotation.annotation-blunder { color: #fecaca; }
.chess-move-annotation.engine-quality { padding:1px; }
.chess-square.quality-inaccuracy { box-shadow:inset 0 0 0 4px var(--move-inaccuracy); }
.chess-square.quality-mistake { box-shadow:inset 0 0 0 4px var(--move-mistake); }
.chess-square.quality-blunder { box-shadow:inset 0 0 0 4px var(--move-blunder); }
.selected-move-quality { display:flex; align-items:center; flex-wrap:wrap; gap:10px; min-height:40px; margin-block:8px; }

.chess-board-resize-handle { position: absolute; right: -8px; bottom: -8px; z-index: 12; width: 44px; height: 44px; border: 0; background: transparent; cursor: nwse-resize; touch-action: none; }
.chess-board-resize-handle span { position: absolute; right: 5px; bottom: 5px; width: 18px; height: 18px; border-right: 3px solid #f49a2f; border-bottom: 3px solid #f49a2f; border-radius: 0 0 5px; }
.chess-board-shell.is-board-resizing { width: min(var(--opening-board-live-size), 100%); }
html.chess-resize-active { cursor: nwse-resize; user-select: none; }

.promotion-modal-backdrop { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 1rem; background: #05070bd9; }
.promotion-picker { width: min(520px, 100%); padding: 1.3rem; border: 1px solid #ffffff2b; border-radius: 1rem; background: #111722; box-shadow: 0 2rem 5rem #000b; }
.promotion-picker > div:first-child { display: grid; gap: .25rem; margin-bottom: 1rem; }
.promotion-picker > div:first-child span { color: #a9afbb; }
.promotion-choices { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .65rem; }
.promotion-choices button, .promotion-cancel { min-height: 48px; border: 1px solid #ffffff2b; border-radius: .65rem; background: #080b11; color: inherit; cursor: pointer; }
.promotion-choices button { display: grid; gap: .2rem; padding: .55rem; }
.promotion-choices img { width: 100%; max-height: 70px; }
.promotion-cancel { width: 100%; margin-top: .8rem; }

.opening-catalog-shell, .opening-editor-shell { width: min(1280px, calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0 5rem; }
.opening-page-header { display: flex; justify-content: space-between; align-items: end; gap: 1.5rem; margin-bottom: 1.5rem; }
.opening-page-header h1 { margin: .2rem 0; }
.opening-page-header p { color: #bdc2cc; }
.opening-create-card { margin-bottom: 1.5rem; }
.opening-catalog-tools { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; margin: 1.5rem 0; padding: 1rem; border: 1px solid #ffffff20; border-radius: .8rem; background: #10141ddd; }
.opening-catalog-tools label { display: grid; gap: .35rem; }
.opening-color-filters { display: flex; flex-wrap: wrap; gap: .4rem; }
.opening-color-filters button { min-height: 44px; padding: .55rem .8rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 999px; color: var(--mud-palette-text-primary); background: transparent; font: inherit; cursor: pointer; }
.opening-color-filters button.selected { border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 12%, transparent); }
.opening-catalog-tools input, .opening-catalog-tools select, .opening-tree-panel input, .opening-tree-panel select, .opening-tree-panel textarea { min-height: 44px; border: 1px solid #ffffff2d; border-radius: .55rem; background: #07090e; color: inherit; padding: .6rem; }
.opening-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.opening-card {
    position: relative; display: grid; align-content: start; gap: .65rem; padding: 1.2rem; overflow: hidden;
    border: 1px solid #ffffff20; border-radius: 1.25rem; background: #10141ddd; box-shadow: 0 6px 20px #0f172a14;
}
.opening-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; background: #d9e2ec; }
.opening-card.color-b::before { background: #334155; }
.opening-card h2, .opening-card p { margin: 0; }
.opening-card p { color: #bdc2cc; line-height: 1.5; }
.opening-color-badge { justify-self: start; padding: .28rem .6rem; border-radius: 999px; background: #ffffff12; color: #f4b865; }
.opening-card-heading { display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: center; gap: 12px; }
.opening-color-avatar {
    display: grid; place-items: center; width: 52px; height: 52px; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 17px; color: #0f172a; background: linear-gradient(145deg, #fff, #dbe6f1); font-size: 2rem; text-shadow: 0 1px #fff;
}
.color-b .opening-color-avatar { color: #fff; background: linear-gradient(145deg, #334155, #0f172a); text-shadow: 0 1px 1px #000; }
.opening-card-title { display: grid; min-width: 0; gap: .15rem; }
.opening-card-title h2 { overflow: hidden; font-size: 1.15rem; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
.opening-card-title span, .opening-tags, .opening-last-update { color: var(--mud-palette-text-secondary); font-size: .78rem; }
.opening-description { min-height: 2.8rem; }
.opening-card-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: .35rem; }
.opening-card-stats > div {
    display: grid; grid-template-columns: 18px 1fr; padding: 9px 8px; border-radius: 12px;
    background: color-mix(in srgb, var(--mud-palette-background) 88%, var(--mud-palette-primary) 12%);
}
.opening-card-stats > div > span { grid-row: 1 / 3; align-self: center; color: var(--mud-palette-primary); }
.opening-card-stats strong { font-size: .9rem; line-height: 1; }
.opening-card-stats small { color: var(--mud-palette-text-secondary); font-size: .64rem; }
.opening-review-summary {
    display: flex; min-height: 38px; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px;
    border: 1px solid color-mix(in srgb, #f59e0b 38%, var(--mud-palette-lines-default)); border-radius: 11px;
    color: var(--mud-palette-text-primary); background: color-mix(in srgb, #f59e0b 8%, transparent); font: inherit; cursor: pointer;
}
.opening-review-summary i { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: #f59e0b; }
.opening-mastery-status {
    display: flex; min-height: 38px; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid #4ade803d;
    border-radius: 11px; color: #86d993; background: #22c55e14; font-size: .78rem; font-weight: 700;
}
.opening-mastery-status.never { border-color: var(--mud-palette-lines-default); color: var(--mud-palette-text-secondary); background: #94a3b80f; }
.opening-tags { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.opening-last-update { margin-top: auto !important; }
.opening-card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; padding-top: .35rem; }
.opening-card-actions .opening-train-cta { flex: 1 0 100%; min-height: 44px; justify-content: center; margin: 0 0 .2rem; border-radius: 12px; }
.opening-icon-action {
    display: grid; width: 38px; height: 38px; flex: 0 0 auto; place-items: center; padding: 0; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 50%; color: var(--mud-palette-text-primary); background: transparent; text-decoration: none; font: inherit; cursor: pointer;
}
.opening-icon-action:hover { border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 10%, transparent); }
.opening-icon-action.danger { color: #ef4444; }
.opening-icon-action:disabled { cursor: wait; opacity: .5; }
.opening-empty-state { justify-items: center; text-align: center; }
.opening-empty-state > span { display: grid; width: 88px; height: 88px; place-items: center; border-radius: 28px; color: #fff; background: linear-gradient(145deg, #2563eb, #0891b2); font-size: 2.5rem; box-shadow: 0 14px 30px #2563eb40; }
.opening-create-dialog, .opening-edit-dialog, .opening-stats-dialog { width: min(620px, 100%); max-height: min(90vh, 900px); overflow: auto; }
.opening-dialog-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.opening-dialog-header h2, .opening-dialog-header p { margin: .15rem 0; }
.opening-dialog-close { width: 42px; height: 42px; flex: 0 0 auto; border: 0; border-radius: 50%; color: inherit; background: transparent; font-size: 1.7rem; cursor: pointer; }
.opening-dialog-close:hover { background: color-mix(in srgb, var(--mud-palette-text-primary) 8%, transparent); }
.opening-create-mode { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding: 4px; border-radius: 15px; background: #94a3b81a; }
.opening-create-mode button { min-height: 54px; border: 1px solid transparent; border-radius: 12px; color: var(--mud-palette-text-secondary); background: transparent; font: inherit; font-weight: 700; cursor: pointer; }
.opening-create-mode button.selected { border-color: color-mix(in srgb, var(--mud-palette-primary) 38%, transparent); color: var(--mud-palette-text-primary); background: var(--mud-palette-surface); box-shadow: 0 3px 12px #0f172a1f; }
.opening-import-summary { padding: .8rem; border: 1px solid #4ade8050; border-radius: .7rem; color: var(--mud-palette-text-primary) !important; background: #22c55e12; }
.opening-stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; }
.opening-stats-grid > div { display: grid; gap: .15rem; padding: 1rem; border-radius: .8rem; background: color-mix(in srgb, var(--mud-palette-background) 88%, var(--mud-palette-primary) 12%); }
.opening-stats-grid strong { font-size: 1.35rem; }
.opening-stats-grid span { color: var(--mud-palette-text-secondary); font-size: .75rem; }
.opening-editor-grid { display: grid; grid-template-columns: minmax(300px, 720px) minmax(280px, 1fr); gap: 1.5rem; align-items: start; }
.opening-board-column, .opening-tree-panel, .opening-overview { padding: 1rem; border: 1px solid #ffffff20; border-radius: 1rem; background: #10141ddd; }
.opening-tree-panel { display: grid; gap: .75rem; max-height: 82vh; overflow: auto; }
.opening-tree-panel h2 { margin: .5rem 0 0; }
.opening-tree-panel label { display: grid; gap: .3rem; }
.opening-tree-panel textarea { min-height: 110px; resize: vertical; }
.opening-metadata-editor { display: grid; gap: .65rem; padding: .75rem; border: 1px solid #ffffff20; border-radius: .65rem; }
.opening-metadata-editor summary { cursor: pointer; font-weight: 700; }
.opening-metadata-editor[open] summary { margin-bottom: .5rem; }
.opening-child-list { display: grid; gap: .5rem; margin: 0; padding: 0; list-style: none; }
.opening-child-list button, .opening-lines-list button { width: 100%; min-height: 44px; padding: .65rem; border: 1px solid #ffffff20; border-radius: .55rem; background: #080b11; color: inherit; text-align: left; cursor: pointer; }
.opening-child-list button.main-line, .opening-lines-list button.main-line { border-color: #f49a2f; }
.opening-child-list button span, .opening-lines-list button span { margin-left: .45rem; color: #f4b865; font-size: .82rem; }
.opening-path-navigation, .opening-markup-tools { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-top: .9rem; }
.opening-path-navigation button, .opening-markup-tools button, .opening-markup-tools select { min-width: 44px; min-height: 44px; border: 1px solid #ffffff2d; border-radius: .55rem; background: #080b11; color: inherit; }
.opening-markup-tools .selected { border-color: #f49a2f; background: #f49a2f20; }
.opening-overview { margin-top: 1.5rem; }
.opening-lines-list { display: grid; gap: .45rem; }
.incomplete-line { padding: .7rem; border-left: 3px solid #f49a2f; background: #f49a2f12; }
.danger-action { min-height: 44px; padding: .65rem 1rem; border: 1px solid #ef4444; border-radius: .55rem; background: #7f1d1d; color: #fff; cursor: pointer; }
.modal-backdrop { position: fixed; inset: 0; z-index: 1100; display: grid; place-items: center; padding: 1rem; background: #05070be8; }
.deleted-repository-row { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(240px, 1fr) auto; gap: .8rem; align-items: center; padding: .7rem 0; border-top: 1px solid #ffffff18; }
.deleted-repository-row code { overflow-wrap: anywhere; }
.analysis-free-action { width: 100%; justify-content: center; }
.analysis-privacy-banner { display: grid; gap: .35rem; margin-top: .7rem; padding: .8rem; border: 1px solid #38bdf855; border-radius: .7rem; background: #07598522; }
.analysis-privacy-banner span { color: #bdc2cc; font-size: .9rem; }
.analysis-privacy-banner button { justify-self: start; min-height: 40px; border: 0; background: transparent; color: #7dd3fc; text-decoration: underline; cursor: pointer; }
.stockfish-analysis { display: grid; gap: .8rem; margin-top: 1rem; padding: 1rem; border: 1px solid #ffffff20; border-radius: .85rem; background: #080b11; }
.stockfish-analysis > header, .stockfish-analysis-title, .stockfish-analysis-header-actions, .stockfish-setting-heading, .stockfish-range-setting > span { display: flex; align-items: center; justify-content: space-between; gap: .7rem; }
.stockfish-analysis-title > div, .stockfish-setting-heading { display: grid; gap: .1rem; }
.stockfish-analysis small, .stockfish-analysis-legal, .stockfish-setting-heading span { color: #a9afbb; }
.stockfish-analysis-state { padding: .2rem .5rem; border-radius: 999px; background: #ffffff12; font-size: .78rem; }
.stockfish-settings, .stockfish-analysis-lines { display: grid; gap: .7rem; }
.stockfish-engine-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; }
.stockfish-engine-option, .stockfish-analysis-line { min-height: 48px; border: 1px solid #ffffff24; border-radius: .65rem; background: #0f141d; color: inherit; cursor: pointer; }
.stockfish-engine-option { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .45rem; padding: .65rem; text-align: left; }
.stockfish-engine-option span { display: grid; }
.stockfish-engine-option.active { border-color: #f49a2f; background: #f49a2f14; }
.stockfish-engine-option:disabled { cursor: not-allowed; opacity: .5; }
.stockfish-range-setting { display: grid; gap: .4rem; }
.stockfish-range-setting input { width: 100%; accent-color: #f49a2f; }
.stockfish-range-setting input[type="number"] { min-width: 0; padding: .55rem .7rem; border: 1px solid var(--mud-palette-lines-inputs); border-radius: 8px; background: var(--mud-palette-background); color: var(--mud-palette-text-primary); font: inherit; }
.stockfish-analysis-actions { display: flex; flex-wrap: wrap; gap: .4rem; }
.stockfish-analysis-line { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .7rem; padding: .65rem; text-align: left; }
.stockfish-analysis-line > .stockfish-analysis-pv { display: flex; flex-wrap: wrap; }
.stockfish-evaluation-only { display: flex; align-items: baseline; flex-wrap: wrap; gap: .55rem; padding: .7rem; border-radius: .6rem; background: #ffffff0b; }
.stockfish-analysis-legal summary { cursor: pointer; }
.stockfish-batch-dialog { width: min(760px, 100%); max-height: min(88vh, 900px); overflow: auto; }
.stockfish-batch-dialog progress { width: 100%; accent-color: #f49a2f; }
.stockfish-batch-results { display: grid; gap: .55rem; max-height: 48vh; overflow: auto; }
.stockfish-batch-results label { display: grid; grid-template-columns: auto 1fr; gap: .3rem .7rem; padding: .7rem; border: 1px solid #ffffff20; border-radius: .6rem; }
.stockfish-batch-results label.has-conflict { border-color: #f59e0b; background: #f59e0b0d; }
.stockfish-batch-results input { grid-row: 1 / span 2; width: auto; }
.stockfish-batch-results small { color: #a9afbb; }
.opening-editor-header-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: .45rem; }
.opening-editor-header-actions .primary-action, .opening-editor-header-actions .secondary-action { min-height: 42px; margin: 0; cursor: pointer; }
.opening-editor-side-column { display: grid; min-width: 0; gap: .7rem; align-content: start; }
.opening-editor-side-column > .opening-tree-panel { max-height: none; }
.opening-side-section { display: grid; gap: .7rem; }
.opening-side-section + .opening-side-section { padding-top: .8rem; border-top: 1px solid var(--mud-palette-lines-default); }
.opening-editor-mobile-tabs { display: none; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .4rem; }
.opening-editor-mobile-tabs button {
    min-height: 44px; border: 1px solid var(--mud-palette-lines-default); border-radius: .7rem;
    color: var(--mud-palette-text-primary); background: var(--mud-palette-background); font: inherit; font-weight: 700;
}
.opening-editor-mobile-tabs button.selected { border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 12%, var(--mud-palette-surface)); }
.opening-journey-header { display: flex; align-items: flex-start; justify-content: space-between; gap: .8rem; }
.opening-journey-header h2, .opening-journey-header h3, .opening-journey-header p { margin: .15rem 0; }
.opening-journey-header .secondary-action { margin: 0; white-space: nowrap; }
.opening-child-list button { display: flex; align-items: center; flex-wrap: wrap; gap: .3rem; }
.opening-child-list button small { width: 100%; color: var(--mud-palette-text-secondary); }
.opening-root-details { padding: 1rem; border: 1px dashed var(--mud-palette-lines-default); border-radius: .8rem; text-align: center; }
.opening-board-toolbar { display: flex; align-items: end; justify-content: space-between; flex-wrap: wrap; gap: .6rem; margin-top: .7rem; }
.opening-board-toolbar label { display: grid; gap: .25rem; color: var(--mud-palette-text-secondary); font-size: .75rem; }
.opening-board-toolbar select { min-height: 42px; border: 1px solid var(--mud-palette-lines-default); border-radius: .65rem; color: var(--mud-palette-text-primary); background: var(--mud-palette-background); padding: .5rem; }
.opening-board-toolbar .secondary-action { min-height: 42px; margin: 0; border: 1px solid var(--mud-palette-lines-default); border-radius: .7rem; background: transparent; font: inherit; cursor: pointer; }
.opening-editor-board.board-size-compact .chess-board-shell { max-width: 430px; }
.opening-editor-board.board-size-normal .chess-board-shell { max-width: 560px; }
.opening-editor-board.board-size-large .chess-board-shell { max-width: 720px; }
.opening-editor-grid.board-focus { grid-template-columns: minmax(300px, 900px); justify-content: center; }
.opening-editor-grid.board-focus .opening-editor-side-column, .opening-editor-grid.board-focus + .opening-overview-summary { display: none; }
.opening-editor-board { grid-column: 1; grid-row: 1 / span 3; }
.opening-tree-panel { grid-column: 2; grid-row: 1; }
.opening-reference-slot { grid-column: 2; grid-row: 2; min-width: 0; }
.opening-details-panel { grid-column: 3; grid-row: 1 / span 3; }
.opening-overview-summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.opening-overview-summary h2, .opening-overview-summary p { margin: .2rem 0; }
.opening-overview-summary .primary-action { flex: 0 0 auto; margin: 0; }
.opening-overview-dialog { width: min(1040px, 100%); max-height: min(92vh, 980px); grid-template-rows: auto auto auto auto minmax(180px, 1fr) auto; overflow: hidden; }
.opening-overview-toolbar { display: flex; align-items: end; gap: .7rem; }
.opening-overview-toolbar label { display: grid; flex: 1 1 300px; gap: .3rem; }
.opening-overview-toolbar .secondary-action { margin: 0; }
.opening-overview-filters { display: flex; flex-wrap: wrap; gap: .45rem; }
.opening-overview-filters button {
    min-height: 42px; padding: .5rem .8rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 999px;
    color: var(--mud-palette-text-primary); background: transparent; font: inherit; cursor: pointer;
}
.opening-overview-filters button.selected { border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 12%, transparent); }
.opening-overview-filters span { margin-left: .25rem; color: var(--mud-palette-text-secondary); }
.opening-overview-explanation { display: flex; align-items: center; gap: .7rem; padding: .75rem; border-radius: .75rem; background: color-mix(in srgb, var(--mud-palette-primary) 8%, transparent); }
.opening-overview-explanation > span { color: var(--mud-palette-primary); font-size: 1.4rem; }
.opening-overview-explanation p { margin: 0; }
.opening-overview-scroll { min-height: 0; overflow: auto; padding-right: .25rem; }
.opening-grouped-lines { display: grid; gap: .65rem; }
.opening-line-group { overflow: hidden; border: 1px solid var(--mud-palette-lines-default); border-radius: .9rem; background: var(--mud-palette-background); }
.opening-line-group button { width: 100%; min-height: 48px; padding: .7rem .85rem; border: 0; color: var(--mud-palette-text-primary); background: transparent; text-align: left; cursor: pointer; }
.opening-line-group button:hover { background: color-mix(in srgb, var(--mud-palette-primary) 9%, transparent); }
.opening-line-group button span, .opening-line-group button strong { display: block; }
.opening-line-group button span { color: var(--mud-palette-text-secondary); font-size: .72rem; }
.opening-line-common { border-bottom: 1px solid var(--mud-palette-lines-default) !important; background: color-mix(in srgb, var(--mud-palette-primary) 7%, var(--mud-palette-surface)) !important; }
.opening-line-continuations { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.opening-line-continuations button:nth-child(even) { border-left: 1px solid var(--mud-palette-lines-default); }
.opening-line-continuations button:nth-child(n+3) { border-top: 1px solid var(--mud-palette-lines-default); }
.opening-line-group button.main-line { box-shadow: inset 4px 0 var(--mud-palette-primary); }
.opening-overview-empty { display: grid; justify-items: center; gap: .5rem; padding: 2rem; text-align: center; }
.opening-overview-load-more { display: flex; width: 100%; min-height: 54px; align-items: center; justify-content: center; gap: .7rem; margin-top: .7rem; border: 1px dashed var(--mud-palette-primary); border-radius: .8rem; color: var(--mud-palette-text-primary); background: transparent; cursor: pointer; }
.opening-overview-load-more span { display: grid; text-align: left; }
.opening-overview-load-more small { color: var(--mud-palette-text-secondary); }
.opening-overview-results { display: flex; justify-content: space-between; gap: 1rem; color: var(--mud-palette-text-secondary); font-size: .8rem; }
.opening-training-options-dialog { width: min(660px, 100%); max-height: min(92vh, 900px); overflow: auto; }
.opening-training-scope { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.opening-training-scope-choice {
    display: grid; grid-template-columns: 42px minmax(0, 1fr); align-items: center; gap: .7rem; min-height: 86px;
    padding: .8rem; border: 2px solid var(--mud-palette-lines-default); border-radius: .9rem;
    color: var(--mud-palette-text-primary); background: var(--mud-palette-surface); text-align: left; font: inherit; cursor: pointer;
}
.opening-training-scope-choice.selected { border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 9%, var(--mud-palette-surface)); }
.opening-training-scope-choice > span:first-child { display: grid; width: 42px; height: 42px; place-items: center; border-radius: .7rem; color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 13%, transparent); font-size: 1.35rem; }
.opening-training-scope-choice > span:last-child { display: grid; gap: .15rem; }
.opening-training-scope-choice small { color: var(--mud-palette-text-secondary); }
.opening-training-shell { width: min(1280px, calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0 5rem; }
.training-catalog { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.training-repository-card { position: relative; padding: 1rem; overflow: hidden; border: 1px solid #ffffff20; border-radius: 1.2rem; background: #10141ddd; box-shadow: 0 6px 20px #0f172a12; }
.training-repository-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; background: #d9e2ec; }
.training-repository-card.color-b::before { background: #334155; }
.training-repository-card.selected { border-color: var(--mud-palette-primary); box-shadow: 0 0 0 1px color-mix(in srgb, var(--mud-palette-primary) 28%, transparent); }
.training-repository-card .check-row span { display: grid; gap: .2rem; }
.training-repository-card small, .training-repository-card p { color: #a9afbb; }
.training-repository-heading { display: grid !important; grid-template-columns: 48px minmax(0, 1fr); align-items: center; gap: .65rem !important; }
.training-repository-heading > i { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid var(--mud-palette-lines-default); border-radius: 15px; color: #0f172a; background: linear-gradient(145deg, #fff, #dbe6f1); font-size: 1.8rem; font-style: normal; }
.color-b .training-repository-heading > i { color: #fff; background: linear-gradient(145deg, #334155, #0f172a); }
.training-card-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem; margin: .6rem 0; }
.training-card-stats div { padding: .55rem; border-radius: .65rem; background: #080b11; }
.training-card-stats dt { color: #a9afbb; font-size: .75rem; }
.training-card-stats dd { margin: .2rem 0 0; font-weight: 700; }
.training-mastery-summary { padding: .55rem .7rem; border: 1px solid var(--mud-palette-lines-default); border-radius: .65rem; background: #94a3b80d; font-size: .75rem; }
.training-line-mode { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; margin: .7rem 0; }
.training-line-mode button { min-height: 44px; border: 1px solid #ffffff24; border-radius: .55rem; background: #080b11; color: inherit; cursor: pointer; }
.training-line-mode button.selected { border-color: #f49a2f; background: #f49a2f18; }
.training-line-picker { display: grid; gap: .4rem; max-height: 300px; overflow: auto; }
.training-line-picker label { display: grid; grid-template-columns: auto 1fr; gap: .2rem .55rem; padding: .55rem; border-left: 3px solid #64748b; background: #080b1188; }
.training-line-picker label small { grid-column: 2; }
.training-line-picker label.mastery-mastered { border-color: #22c55e; }
.training-line-picker label.mastery-due, .training-line-picker label.mastery-struggling { border-color: #f59e0b; }
.training-start-bar .primary-action { margin: 0 0 0 auto; }
.training-session-header { display: grid; grid-template-columns: 1fr minmax(180px, 35%); align-items: end; gap: 1rem; }
.training-session-header h1 { margin: .2rem 0; }
.training-session-header progress { width: 100%; accent-color: #f49a2f; }
.training-session-progress { display: grid; gap: .35rem; }
.training-session-progress strong { justify-self: end; }
.training-session-grid { display: grid; grid-template-columns: minmax(300px, 720px) minmax(280px, 1fr); gap: 1.5rem; margin-top: 1rem; align-items: start; }
.training-session-grid > *, .training-coach-panel { padding: 1rem; border: 1px solid #ffffff20; border-radius: 1rem; background: #10141ddd; }
.training-session-grid.board-focus { grid-template-columns: minmax(300px, 880px) minmax(260px, 360px); justify-content: center; }
.training-board-column.board-size-compact .chess-board-shell { max-width: 430px; }
.training-board-column.board-size-normal .chess-board-shell { max-width: 560px; }
.training-board-column.board-size-large .chess-board-shell { max-width: 720px; }
.training-board-toolbar { display: flex; align-items: end; justify-content: space-between; gap: .6rem; margin-top: .7rem; }
.training-board-toolbar label { display: grid; gap: .25rem; color: var(--mud-palette-text-secondary); font-size: .75rem; }
.training-board-toolbar select, .training-board-toolbar button { min-height: 42px; padding: .5rem .7rem; border: 1px solid var(--mud-palette-lines-default); border-radius: .65rem; color: var(--mud-palette-text-primary); background: var(--mud-palette-background); font: inherit; }
.training-coach-panel { display: grid; gap: .8rem; }
.training-feedback { padding: .8rem; border-left: 3px solid #38bdf8; background: #38bdf812; }
.training-feedback.success { border-color: #22c55e; background: #22c55e12; }
.training-feedback.error { border-color: #ef4444; background: #ef444412; }
.training-help-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.training-help-actions button, .training-coach-panel button:not(.primary-action) { min-height: 44px; border: 1px solid #ffffff2d; border-radius: .55rem; background: #080b11; color: inherit; cursor: pointer; }
.training-hint, .training-solution, .training-comment-panel, .training-rule-reminder { padding: .7rem; border-radius: .6rem; background: #ffffff0b; }
.training-rule-reminder { color: #a9afbb; font-size: .9rem; }
.training-complete-hero { display: grid; justify-items: center; text-align: center; }
.training-complete-hero > span { display: grid; width: 64px; height: 64px; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(145deg, #2563eb, #0891b2); font-size: 2rem; box-shadow: 0 10px 24px #2563eb40; }
.training-complete-hero h2, .training-complete-hero p { margin: .2rem 0; }
.training-results { display: grid; grid-template-columns: repeat(2, 1fr); gap: .7rem; margin: 0; }
.training-results div { padding: .7rem; border-radius: .6rem; background: #080b11; }
.training-results dt { color: #a9afbb; }
.training-results dd { margin: .2rem 0 0; font-size: 1.5rem; font-weight: 800; }
/* Friends / sharing layout lives in the dedicated compatibility stylesheet. */

/* Guide applicatif. */
.cof-guide-page { width: min(1280px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(1rem, 3vw, 2rem) 0 4rem; }
.cof-guide-hero { position: relative; display: grid; grid-template-columns: minmax(190px, .55fr) minmax(0, 1.45fr); align-items: center; min-height: 330px; overflow: hidden; border: 1px solid #f9731638; border-radius: 28px; color: #f8fafc; background: radial-gradient(circle at 18% 45%, #f973163b, transparent 28%), radial-gradient(circle at 88% 12%, #60a5fa33, transparent 35%), linear-gradient(135deg, #050b15, #101d2d 58%, #172033); box-shadow: 0 24px 60px #0206172e; }
.cof-guide-brand { z-index: 1; display: grid; min-height: 260px; align-self: stretch; place-items: center; background: radial-gradient(circle, #ffffff17, transparent 58%); }
.cof-guide-brand img { width: min(86%, 245px); max-height: 245px; object-fit: contain; filter: drop-shadow(0 20px 22px #00000061); }
.cof-guide-hero-copy { z-index: 1; max-width: 760px; padding: clamp(1.5rem, 4vw, 3.5rem); }
.cof-guide-hero-copy h1 { max-width: 18ch; margin: .25rem 0 .85rem; color: #fff; font-size: clamp(2rem, 4.5vw, 3.5rem); font-weight: 900; line-height: 1.04; letter-spacing: -.04em; }
.cof-guide-hero-copy > p:not(.eyebrow) { max-width: 65ch; color: #cbd5e1; line-height: 1.65; }
.cof-guide-hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.35rem; }
.cof-guide-hero-actions .primary-action, .cof-guide-hero-actions .secondary-action { min-height: 44px; margin: 0; border-radius: 12px; }
.cof-guide-hero-actions .secondary-action { border: 1px solid #ffffff80; color: #fff; }
.cof-guide-section { margin-top: clamp(2rem, 5vw, 4rem); }
.cof-guide-section-heading { margin-bottom: 1.25rem; }
.cof-guide-section-heading > span { color: #fb923c; font-weight: 850; letter-spacing: .11em; }
.cof-guide-section-heading h2 { margin: .25rem 0 .35rem; font-weight: 850; letter-spacing: -.025em; }
.cof-guide-section-heading p { color: var(--mud-palette-text-secondary); }
.cof-guide-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; }
.cof-guide-steps article, .cof-guide-features article, .cof-guide-practical-grid > div { border: 1px solid var(--mud-palette-lines-default); background: var(--mud-palette-surface); box-shadow: 0 10px 28px #0f172a0f; }
.cof-guide-steps article { position: relative; min-height: 220px; padding: 1.25rem; overflow: hidden; border-radius: 20px; }
.cof-guide-steps article > span { position: absolute; top: .8rem; right: .9rem; color: color-mix(in srgb, var(--mud-palette-text-primary) 8%, transparent); font-size: 4rem; font-weight: 900; line-height: 1; }
.cof-guide-steps article > i { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 13px; color: #f97316; background: color-mix(in srgb, #f97316 12%, var(--mud-palette-surface)); font-size: 24px; font-style: normal; }
.cof-guide-steps h3, .cof-guide-features h3, .cof-guide-practical h3 { margin: 1rem 0 .45rem; font-size: 1.05rem; font-weight: 850; }
.cof-guide-steps p, .cof-guide-features p, .cof-guide-practical li { color: var(--mud-palette-text-secondary); line-height: 1.55; }
.cof-guide-features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.cof-guide-features article { display: flex; min-width: 0; gap: 1rem; padding: 1.2rem; border-radius: 18px; }
.cof-guide-feature-icon { display: grid; width: 48px; height: 48px; flex: 0 0 auto; place-items: center; border-radius: 15px; color: #fff; background: linear-gradient(145deg, #f97316, #ea580c); box-shadow: 0 9px 20px #f9731638; }
.cof-guide-features h3 { margin-top: 0; }
.cof-guide-features p { margin: 0; }
.cof-guide-spaced-review { padding: clamp(20px, 3vw, 34px); border: 1px solid color-mix(in srgb, var(--mud-palette-primary) 22%, var(--mud-palette-lines-default)); border-radius: 24px; background: color-mix(in srgb, var(--mud-palette-primary) 4%, var(--mud-palette-surface)); }
.cof-guide-review-timeline { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
.cof-guide-review-timeline article { display: grid; grid-template-columns: 46px minmax(0, 1fr); align-content: start; gap: 10px; min-width: 0; padding: 16px; border: 1px solid var(--mud-palette-lines-default); border-radius: 18px; background: var(--mud-palette-surface); }
.cof-guide-review-timeline article > span { display: grid; width: 46px; height: 46px; place-items: center; border-radius: 14px; color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 13%, transparent); }
.cof-guide-review-timeline article.retry > span { color: #f59e0b; background: #f59e0b24; }
.cof-guide-review-timeline article.mastered > span { color: #22c55e; background: #22c55e21; }
.cof-guide-review-timeline small { color: var(--mud-palette-primary); font-size: .68rem; font-weight: 900; }
.cof-guide-review-timeline h3 { margin: 2px 0 7px; font-size: .94rem; }
.cof-guide-review-timeline p { margin: 0; color: var(--mud-palette-text-secondary); font-size: .76rem; line-height: 1.55; }
.cof-guide-review-tip { display: flex; align-items: center; gap: 12px; margin-top: 14px; padding: 14px 16px; border-radius: 16px; color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 10%, transparent); }
.cof-guide-review-tip p, .cof-guide-review-tip p span { display: grid; margin: 0; }
.cof-guide-review-tip p span { color: var(--mud-palette-text-secondary); font-size: .78rem; }
.cof-guide-practical-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.cof-guide-practical-grid > div { padding: 1.3rem; border-radius: 20px; }
.cof-guide-practical-grid > div > i { color: var(--mud-palette-primary); font-size: 30px; font-style: normal; }
.cof-guide-practical ul { margin: .65rem 0 0; padding-left: 1.15rem; }
.cof-guide-practical li + li { margin-top: .45rem; }
.cof-guide-help { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; padding: 1.2rem 1.35rem; border: 1px solid color-mix(in srgb, #f97316 28%, var(--mud-palette-lines-default)); border-radius: 20px; background: color-mix(in srgb, #f97316 7%, var(--mud-palette-surface)); }
.cof-guide-start { flex: 0 0 auto; width: auto; white-space: nowrap; }
.cof-guide-help > div { display: flex; min-width: 0; align-items: center; gap: 1rem; }
.cof-guide-help > div > span:first-child { color: #f97316; font-size: 2rem; }
.cof-guide-help > div > span:last-child { display: grid; gap: .2rem; }
.cof-guide-help small { color: var(--mud-palette-text-secondary); }
.cof-guide-help .primary-action { flex: 0 0 auto; margin: 0; }

/* Les surfaces applicatives suivent réellement la palette MudBlazor claire ou sombre. */
.hero p:not(.eyebrow), .status-page p, .account-card > p, .board-lab-intro,
.opening-page-header p, .opening-card p, .training-repository-card small,
.training-repository-card p, .stockfish-analysis small,
.stockfish-analysis-legal, .stockfish-setting-heading span {
    color: var(--mud-palette-text-secondary);
}
.secondary-action { color: var(--mud-palette-text-primary); }
.account-card, .board-controls, .opening-catalog-tools, .opening-card,
.opening-board-column, .opening-tree-panel, .opening-overview,
.training-repository-card, .training-session-grid > *, .training-coach-panel,
.stockfish-analysis {
    border-color: var(--mud-palette-lines-default);
    color: var(--mud-palette-text-primary);
    background: var(--mud-palette-surface);
}
.account-card input, .account-card textarea, .account-card select, .board-controls select,
.opening-catalog-tools input, .opening-catalog-tools select,
.opening-tree-panel input, .opening-tree-panel select, .opening-tree-panel textarea,
.language-option, .stockfish-engine-option,
.stockfish-analysis-line, .promotion-choices button, .promotion-cancel {
    border-color: var(--mud-palette-lines-inputs);
    color: var(--mud-palette-text-primary);
    background: var(--mud-palette-background);
}
.opening-child-list button, .opening-lines-list button,
.training-line-mode button, .training-help-actions button,
.training-coach-panel button:not(.primary-action),
.training-card-stats div,
.training-results div, .stockfish-evaluation-only,
.training-hint, .training-solution, .training-comment-panel,
.training-rule-reminder {
    border-color: var(--mud-palette-lines-default);
    color: var(--mud-palette-text-primary);
    background: color-mix(in srgb, var(--mud-palette-surface) 88%, var(--mud-palette-primary) 12%);
}
.admin-section-nav {
    color: var(--mud-palette-text-primary);
    background: color-mix(in srgb, var(--mud-palette-background) 94%, transparent);
}
.admin-table-wrap th, .admin-table-wrap td,
.deleted-repository-row {
    border-color: var(--mud-palette-lines-default);
}

/* Shell de navigation principal. */
html, body, #app { width: 100%; height: 100%; margin: 0; padding: 0; }
#app { display: flex; min-width: 0; }
/* The language provider is the shell's flex item and must fill the viewport. */
#app > .mud-rtl-provider,
.mud-rtl-provider:has(> .mud-layout) { flex: 1 1 0%; min-width: 0; min-inline-size: 0; width: 100%; }
.mud-layout { min-width: 0; }
.app-shell-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.app-shell-desktop-actions, .app-shell-mobile-settings { display: flex; align-items: center; }
.app-account-badges { display: flex; min-width: 0; align-items: center; gap: .45rem; }
.app-account-badges a { text-decoration: none; min-height: 44px; }
.app-account-badges a:focus-visible { outline: 3px solid #60a5fa; outline-offset: 3px; }
.app-account-badge {
    display: inline-flex; min-width: 0; align-items: center; gap: .4rem; min-height: 36px; padding: .3rem .7rem;
    border: 1px solid #ffffff59; border-radius: 999px; color: inherit; background: #ffffff12;
    box-shadow: inset 0 0 0 1px #ffffff0a;
}
.app-account-badge > span { max-width: 180px; overflow: hidden; font-size: .82rem; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
.app-account-identity {
    flex: 0 1 auto; min-width: 92px; border-color: color-mix(in srgb, #60a5fa 64%, #ffffff33);
    background: linear-gradient(135deg, #2563eb2e, #8b5cf629);
}
.app-plan-badge {
    position: relative; min-height: 42px; padding: .22rem .72rem .22rem .28rem; overflow: hidden;
    border-color: #f9731670; background: linear-gradient(135deg, #43140799, #1f2937cc);
    isolation: isolate;
}
.app-plan-badge::after {
    position: absolute; z-index: -1; inset: 0; content: ""; opacity: .3;
    background: radial-gradient(circle at 20% 50%, #fb923c 0, transparent 46%);
}
.app-plan-badge img {
    width: 34px; height: 34px; flex: 0 0 auto; border: 1px solid #fb923c8a; border-radius: 10px;
    object-fit: cover; box-shadow: 0 4px 12px #0007, 0 0 12px #f9731638;
}
.app-plan-badge strong {
    max-width: 135px; overflow: hidden; font-size: .74rem; letter-spacing: .025em;
    text-overflow: ellipsis; white-space: nowrap;
}
.app-plan-badge.master-smith {
    border-color: #fbbf24a3; background: linear-gradient(135deg, #78350f99, #18181bcc);
    box-shadow: inset 0 0 0 1px #fde68a1f, 0 0 16px #f59e0b1f;
}
.app-plan-badge.master-smith img { border-color: #fbbf24bf; box-shadow: 0 4px 12px #0008, 0 0 14px #f59e0b61; }
.app-plan-badge.master-smith strong { color: #fef3c7; }
.app-plan-badge.apprentice strong { color: #ffedd5; }
.app-account-badges-mobile { display: flex; }
.app-account-badges-mobile .app-account-badge { width: 100%; color: var(--mud-palette-text-primary); border-color: var(--mud-palette-lines-default); background: var(--mud-palette-background); }
.app-account-badges-mobile .app-account-badge > span { max-width: none; }
.app-account-badges-mobile { align-items: stretch; flex-direction: column; gap: .55rem; }
.app-account-badges-mobile .app-plan-badge { width: 100%; color: #fff; }
.app-account-badges-mobile .app-plan-badge strong { max-width: none; }
.app-shell-mobile-only, .app-shell-mobile-language { display: none; }
.app-mobile-account-shortcut { display:inline-flex; align-items:center; min-height:44px; padding:.35rem .65rem; border-radius:10px; color:var(--mud-palette-primary); font-weight:700; text-decoration:none; }
.app-mobile-account-shortcut:focus-visible { outline:3px solid var(--mud-palette-primary); outline-offset:2px; }
.app-shell-content { min-width: 0; max-width: 100%; overflow-x: hidden; }
.mud-drawer .mud-navmenu,
.mud-drawer .mud-navmenu.mud-navmenu-default {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0;
    width: 100%;
}
.mud-drawer .mud-nav-link,
.mud-drawer .mud-nav-item {
    display: flex;
    width: 100%;
}
.app-nav-premium-feature { display: flex; min-width: 0; flex: 1 1 auto; align-items: center; justify-content: space-between; gap: .45rem; }
.app-nav-premium-label { display: inline-flex; flex: 0 0 auto; align-items: center; gap: .18rem; padding: .18rem .38rem; border: 1px solid #f59e0b55; border-radius: 999px; color: #fbbf24; background: #f59e0b12; font-size: .56rem; font-weight: 900; line-height: 1; }
.app-nav-premium-label .mud-icon-root { font-size: .72rem; }
/* Berlioz-inspired hierarchy: small blue headings above softly outlined groups. */
.app-navigation-drawer { max-width: calc(100vw - 32px); }
.app-navigation { padding: 6px 8px; }
.app-navigation .mud-nav-link {
    min-height: 44px; align-items: center; gap: 0; border-radius: 9px;
    padding: 10px 12px; line-height: 1.35; box-sizing: border-box;
}
/* UX-007 — enforce 44px touch on compact drawers (Mud can shrink below min-height).
   Language trigger 44px: base rule `.language-selector-trigger` (Lead) — not duplicated here. */
@media (max-width: 960px) {
    .app-navigation .mud-nav-link,
    .app-navigation .app-nav-group .mud-navmenu .mud-nav-link {
        min-height: 44px !important;
        padding-block: 11px;
    }
}
.app-navigation .mud-nav-link-text { min-width: 0; white-space: normal; overflow-wrap: anywhere; line-height: 1.35; }
.app-navigation .mud-nav-link-icon, .app-navigation .mud-nav-link-expand-icon { flex-shrink: 0; }
.app-navigation .mud-nav-group > .mud-nav-link {
    color: var(--mud-palette-primary); font-size: .7rem; font-weight: 800;
    letter-spacing: .07em; text-transform: uppercase; padding-inline: 10px;
}
.app-navigation .mud-nav-group > .mud-nav-link .mud-nav-link-icon { color: inherit; width: 16px; height: 16px; margin-inline-end: 8px; }
.app-navigation .mud-nav-link-icon { width: 21px; height: 21px; }
.app-nav-group { margin-block: 8px; }
.app-nav-group > .mud-collapse-container > .mud-collapse-wrapper > .mud-collapse-wrapper-inner > .mud-navmenu {
    padding: 4px; border: 1px solid color-mix(in srgb, var(--mud-palette-primary) 30%, var(--mud-palette-lines-default));
    border-radius: 12px; background: color-mix(in srgb, var(--mud-palette-primary) 4%, var(--mud-palette-drawer-background));
}
.app-navigation .app-nav-group .mud-navmenu .mud-nav-link { padding: 9px 12px; }
.app-nav-group-current > .mud-collapse-container > .mud-collapse-wrapper > .mud-collapse-wrapper-inner > .mud-navmenu {
    border-color: color-mix(in srgb, var(--mud-palette-primary) 48%, var(--mud-palette-lines-default));
}
.app-navigation .mud-nav-link.active:not(.mud-nav-group > .mud-nav-link) {
    color: var(--mud-palette-primary); font-weight: 700;
    background: color-mix(in srgb, var(--mud-palette-primary) 17%, var(--mud-palette-drawer-background));
}
.app-navigation .mud-nav-link:focus-visible { outline: 2px solid var(--mud-palette-primary); outline-offset: -2px; }
.app-nav-group-secondary { margin-top: 9px; border-top: 1px solid var(--mud-palette-lines-default); }
.app-nav-group-secondary:not(.app-nav-group-current) > .mud-nav-link { color: var(--mud-palette-text-secondary); }
.app-nav-context-switch { margin-top: 6px; border-top: 1px solid var(--mud-palette-lines-default); font-weight: 600; }
.app-nav-course-label { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.app-nav-beta { flex: 0 0 auto; padding: 2px 4px; border-radius: 3px; background: color-mix(in srgb, var(--mud-palette-primary) 12%, transparent); color: var(--mud-palette-primary); font-size: .6rem; font-weight: 700; letter-spacing: .035em; }
.app-navigation .app-nav-premium-feature { flex-wrap: wrap; justify-content: flex-start; }
.app-navigation-drawer .mud-drawer-content { overscroll-behavior: contain; padding-bottom: env(safe-area-inset-bottom); }
.app-navigation-drawer .mud-drawer-header { position: sticky; top: 0; z-index: 1; flex-shrink: 0; background: var(--mud-palette-drawer-background); }
.app-navigation-drawer .mud-drawer-header .mud-icon-button,
button[aria-controls="app-navigation"] { min-width: 44px; min-height: 44px; }

/* Le sélecteur conserve les autonymes afin de rester compréhensible dans toute langue. */
.language-selector { min-width: 0; }
.language-selector-trigger {
    display: inline-flex; align-items: center; gap: .45rem; min-height: 44px; max-width: 230px; padding: .4rem .7rem;
    border: 1px solid #ffffff47; border-radius: 12px; color: inherit; background: #ffffff14; font: inherit; cursor: pointer;
}
.language-selector-trigger:hover, .language-selector-trigger:focus-visible {
    border-color: currentColor; background: #ffffff29; outline: none;
}
.language-selector-globe, .language-selector-flag { font-size: 1.15rem; line-height: 1; }
.language-selector-flag, .language-option-flag {
    display: block; width: 1.5rem; aspect-ratio: 4 / 3; border-radius: .18rem; object-fit: cover;
    box-shadow: 0 0 0 1px #0f172a29; flex: 0 0 auto;
}
.language-selector-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.language-modal-backdrop {
    position: fixed; inset: 0; z-index: 1500; display: grid; place-items: center;
    padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right))
        max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
    background: #020617b8; backdrop-filter: blur(8px);
}
.language-modal {
    display: flex; flex-direction: column; width: min(760px, 100%); max-height: min(760px, calc(100dvh - 2rem));
    overflow: hidden; border: 1px solid var(--mud-palette-lines-default); border-radius: 24px;
    color: var(--mud-palette-text-primary); background: var(--mud-palette-surface); box-shadow: 0 28px 80px #00000059;
}
.language-modal-header { display: flex; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.25rem .8rem; }
.language-modal-header h2, .language-modal-header p { margin: 0; }
.language-modal-header h2 { font-size: clamp(1.3rem, 4vw, 1.8rem); }
.language-modal-header p { margin-top: .2rem; color: var(--mud-palette-text-secondary); }
.language-modal-eyebrow { color: var(--mud-palette-primary); font-size: .75rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.language-modal-close {
    flex: 0 0 auto; width: 44px; height: 44px; border: 0; border-radius: 50%; color: inherit;
    background: var(--mud-palette-action-default-hover); font-size: 1.75rem; cursor: pointer;
}
.language-search {
    display: flex; align-items: center; gap: .6rem; margin: 0 1.25rem .8rem; padding: 0 .9rem;
    border: 1px solid var(--mud-palette-lines-inputs); border-radius: 14px; background: var(--mud-palette-background);
}
.language-search:focus-within { border-color: var(--mud-palette-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--mud-palette-primary) 20%, transparent); }
.language-search input { width: 100%; min-height: 48px; border: 0; outline: 0; color: inherit; background: transparent; font: inherit; }
.language-list {
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .55rem; min-height: 0;
    padding: .2rem 1.25rem 1.25rem; overflow: auto; overscroll-behavior: contain;
}
.language-option {
    display: grid; grid-template-columns: 38px minmax(0, 1fr) 24px; align-items: center; gap: .55rem;
    min-height: 60px; padding: .55rem .7rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 14px;
    color: inherit; background: var(--mud-palette-background); text-align: start; cursor: pointer;
}
.language-option:hover, .language-option:focus-visible, .language-option.is-selected {
    border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 10%, var(--mud-palette-surface)); outline: none;
}
.language-option-flag { width: 1.8rem; }
.language-option-label, .language-option-label strong, .language-option-label small { display: block; min-width: 0; }
.language-option-label small { margin-top: .1rem; color: var(--mud-palette-text-secondary); }
.language-option-check { color: var(--mud-palette-primary); font-size: 1.2rem; font-weight: 800; }
.language-option-check[hidden] { display: none !important; }
.language-selector-mobile, .language-selector-mobile .language-selector-trigger { width: 100%; max-width: none; }
html[dir="rtl"] .mud-drawer, html[dir="rtl"] .mud-main-content, html[dir="rtl"] .mud-appbar { direction: rtl; }

/* Écran d’apparence de l’échiquier. */
.board-settings-page { padding-block: clamp(1rem, 3vw, 2rem) 4rem; }
.board-settings-header { display: flex; align-items: flex-start; gap: .8rem; max-width: 900px; margin-bottom: 1.5rem; }
.board-settings-header .mud-typography-overline { color: #f97316; font-weight: 850; letter-spacing: .11em; }
.board-settings-header h1 { margin: .1rem 0 .45rem; font-weight: 900; letter-spacing: -.035em; }
.board-settings-header .mud-typography-body1 { color: var(--mud-palette-text-secondary); line-height: 1.55; }
.board-settings-loading { display: grid; min-height: 45vh; place-items: center; }
.board-settings-layout {
    display: grid; grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
    align-items: start; gap: clamp(1.2rem, 3vw, 2.4rem);
}
.board-settings-preview {
    position: sticky; top: 84px; padding: 1rem; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 24px; background: color-mix(in srgb, var(--mud-palette-surface) 94%, var(--mud-palette-primary) 6%);
    box-shadow: 0 16px 42px #0f172a17;
}
.board-settings-preview > span {
    display: block; margin: 0 0 .8rem .2rem; color: var(--mud-palette-text-secondary);
    font-size: .72rem; font-weight: 850; letter-spacing: .1em;
}
.board-settings-preview .chess-board-shell { width: 100%; }
.board-settings-preview-caption {
    display: flex; align-items: center; gap: .75rem; margin-top: .8rem; padding: .75rem;
    border-radius: 14px; background: var(--mud-palette-background-gray);
}
.board-settings-preview-caption > .mud-icon-root { color: #f97316; }
.board-settings-preview-caption span { display: grid; }
.board-settings-preview-caption small { color: var(--mud-palette-text-secondary); }
.board-settings-controls { display: grid; gap: 1.5rem; min-width: 0; }
.board-settings-controls > section {
    padding: clamp(1rem, 2vw, 1.4rem); border: 1px solid var(--mud-palette-lines-default);
    border-radius: 22px; background: var(--mud-palette-surface);
}
.board-settings-section-title { display: flex; align-items: flex-start; gap: .8rem; margin-bottom: 1rem; }
.board-settings-section-title > span {
    display: grid; flex: 0 0 auto; width: 34px; height: 34px; place-items: center;
    border-radius: 11px; color: #fff; background: linear-gradient(145deg, #f97316, #ea580c); font-weight: 900;
}
.board-settings-section-title h2 { margin: 0; font-size: 1.15rem; font-weight: 850; }
.board-settings-section-title p { margin: .2rem 0 0; color: var(--mud-palette-text-secondary); }
.board-preset-grid, .board-piece-set-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.board-preset-card, .board-piece-set-card, .board-custom-heading { font: inherit; color: inherit; cursor: pointer; }
.board-preset-card, .board-piece-set-card {
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .75rem;
    min-width: 0; min-height: 78px; padding: .75rem; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 16px; text-align: left; background: var(--mud-palette-background);
    transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.board-preset-card:hover, .board-piece-set-card:hover {
    border-color: color-mix(in srgb, var(--mud-palette-primary) 55%, var(--mud-palette-lines-default)); transform: translateY(-1px);
}
.board-preset-card:focus-visible, .board-piece-set-card:focus-visible, .board-custom-heading:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--mud-palette-primary) 42%, transparent); outline-offset: 2px;
}
.board-preset-card.selected, .board-piece-set-card.selected {
    border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 8%, var(--mud-palette-surface));
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--mud-palette-primary) 38%, transparent);
}
.board-preset-card > span:nth-child(2), .board-piece-copy { display: grid; min-width: 0; }
.board-preset-card small, .board-piece-copy small, .board-piece-copy em {
    overflow: hidden; color: var(--mud-palette-text-secondary); font-size: .75rem; font-style: normal; text-overflow: ellipsis;
}
.board-piece-copy em { margin-top: .15rem; color: #16a34a; font-weight: 750; }
.board-preset-card > .mud-icon-root, .board-piece-set-card > .mud-icon-root, .board-custom-heading > .mud-icon-root { color: var(--mud-palette-primary); }
.board-preset-swatch {
    display: grid; grid-template-columns: repeat(2, 22px); grid-template-rows: repeat(2, 22px);
    overflow: hidden; border: 1px solid #0f172a2e; border-radius: 9px;
}
.board-preset-swatch i:nth-child(1), .board-preset-swatch i:nth-child(4) { background: var(--preview-light); }
.board-preset-swatch i:nth-child(2), .board-preset-swatch i:nth-child(3) { background: var(--preview-dark); }
.board-custom-colors {
    margin-top: .8rem; overflow: hidden; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 16px; background: var(--mud-palette-background);
}
.board-custom-colors.active { border-color: var(--mud-palette-primary); box-shadow: 0 0 0 1px color-mix(in srgb, var(--mud-palette-primary) 35%, transparent); }
.board-custom-heading {
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .75rem;
    width: 100%; min-height: 68px; padding: .75rem; border: 0; text-align: left; background: transparent;
}
.board-custom-heading > span:nth-child(2) { display: grid; }
.board-custom-heading small { color: var(--mud-palette-text-secondary); }
.board-custom-icon {
    display: grid; width: 44px; height: 44px; place-items: center; border-radius: 12px;
    color: #f97316; background: color-mix(in srgb, #f97316 12%, var(--mud-palette-surface));
}
.board-color-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; padding: 0 .75rem .75rem; }
.board-color-editor {
    display: grid; min-width: 0; gap: .65rem; padding: .8rem; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 16px; background: color-mix(in srgb, var(--mud-palette-surface) 92%, var(--mud-palette-primary) 8%);
}
.board-color-editor-title { display: flex; min-width: 0; align-items: center; gap: .65rem; }
.board-color-editor-title > span:last-child { display: grid; min-width: 0; }
.board-color-editor-title small { color: var(--mud-palette-text-secondary); font-size: .7rem; }
.board-color-current {
    flex: 0 0 auto; width: 38px; height: 38px; border: 3px solid var(--mud-palette-surface); border-radius: 50%;
    background: var(--selected-color); box-shadow: 0 0 0 1px var(--mud-palette-lines-default), 0 5px 13px #0f172a29;
}
.board-color-picker {
    position: relative; display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; min-height: 50px;
    align-items: center; gap: .55rem; padding: .55rem .7rem; overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--selected-color) 58%, var(--mud-palette-lines-default));
    border-radius: 13px; color: var(--mud-palette-text-primary);
    background: linear-gradient(110deg, color-mix(in srgb, var(--selected-color) 18%, var(--mud-palette-surface)), var(--mud-palette-surface));
    cursor: pointer;
}
.board-color-picker input[type="color"] { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.board-color-picker .mud-icon-root { color: var(--selected-color); filter: drop-shadow(0 1px 1px #0f172a40); }
.board-color-picker span { font-size: .78rem; font-weight: 800; }
.board-color-picker code { color: var(--mud-palette-text-secondary); font-size: .72rem; }
.board-color-picker:focus-within { outline: 3px solid color-mix(in srgb, var(--mud-palette-primary) 38%, transparent); outline-offset: 2px; }
.board-color-hex { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: .55rem; }
.board-color-hex > span { color: var(--mud-palette-text-secondary); font-size: .68rem; font-weight: 800; }
.board-color-hex input {
    min-width: 0; min-height: 42px; padding: .45rem .65rem; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 11px; outline: 0; color: var(--mud-palette-text-primary); background: var(--mud-palette-background);
    font: 800 .78rem ui-monospace, SFMono-Regular, Consolas, monospace; text-transform: uppercase;
}
.board-color-hex input:focus { border-color: var(--mud-palette-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--mud-palette-primary) 18%, transparent); }
.board-color-suggestions { display: flex; flex-wrap: wrap; gap: .45rem; }
.board-color-suggestions button {
    width: 30px; height: 30px; padding: 0; border: 3px solid var(--mud-palette-surface); border-radius: 10px;
    outline: 1px solid var(--mud-palette-lines-default); background: var(--suggested-color); cursor: pointer;
    transition: transform 120ms ease, outline-color 120ms ease;
}
.board-color-suggestions button:hover, .board-color-suggestions button.selected { outline: 2px solid var(--mud-palette-primary); transform: translateY(-2px); }
.board-piece-set-grid { grid-template-columns: 1fr; }
.board-piece-set-card { min-height: 92px; }
.board-piece-preview {
    display: flex; align-items: flex-end; width: 126px; height: 58px; padding: 4px;
    border-radius: 11px; background: linear-gradient(135deg, #f0d9b5 50%, #b58863 50%);
}
.board-piece-preview img { width: 30px; height: 48px; object-fit: contain; }
.board-notation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem; }
.board-notation-card {
    position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .65rem;
    min-width: 0; min-height: 132px; padding: .85rem; border: 1px solid var(--mud-palette-lines-default);
    border-radius: 18px; color: var(--mud-palette-text-primary); background: var(--mud-palette-surface);
    font: inherit; text-align: start; cursor: pointer; transition: border-color 140ms ease, transform 140ms ease, background 140ms ease;
}
.board-notation-card:hover { border-color: color-mix(in srgb, var(--mud-palette-primary) 52%, var(--mud-palette-lines-default)); transform: translateY(-2px); }
.board-notation-card.selected {
    border-color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 8%, var(--mud-palette-surface));
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--mud-palette-primary) 12%, transparent);
}
.board-notation-card:focus-visible { outline: 3px solid color-mix(in srgb, var(--mud-palette-primary) 38%, transparent); outline-offset: 2px; }
.board-notation-card > span:nth-child(2) { align-self: start; min-width: 0; }
.board-notation-card strong, .board-notation-card small { display: block; }
.board-notation-card small { margin-top: .18rem; color: var(--mud-palette-text-secondary); font-size: .72rem; line-height: 1.35; }
.board-notation-card code {
    grid-column: 1 / -1; padding: .48rem .6rem; border-radius: 11px; color: var(--mud-palette-primary);
    background: var(--mud-palette-background-gray); font-family: inherit; font-size: .86rem; font-weight: 850; text-align: center;
}
.board-notation-icon {
    display: grid; width: 38px; height: 38px; place-items: center; border-radius: 12px;
    color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 12%, transparent);
}
.board-behavior-option {
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .8rem;
    min-height: 76px; padding: .85rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 18px;
    color: var(--mud-palette-text-primary); background: color-mix(in srgb, var(--mud-palette-primary) 5%, var(--mud-palette-surface)); cursor: pointer;
}
.board-behavior-option strong, .board-behavior-option small { display: block; }
.board-behavior-option small { margin-top: .15rem; color: var(--mud-palette-text-secondary); }
.board-behavior-icon {
    display: grid; width: 44px; height: 44px; place-items: center; border-radius: 14px;
    color: var(--mud-palette-primary); background: color-mix(in srgb, var(--mud-palette-primary) 13%, transparent);
}
.board-settings-actions {
    position: sticky; bottom: .75rem; z-index: 5; display: flex; align-items: center; justify-content: flex-end; gap: .75rem;
    padding: .75rem; border: 1px solid var(--mud-palette-lines-default); border-radius: 18px;
    background: color-mix(in srgb, var(--mud-palette-surface) 92%, transparent); box-shadow: 0 12px 34px #0f172a1f;
    backdrop-filter: blur(14px);
}

@media (max-width: 820px) {
    .board-lab-grid { grid-template-columns: 1fr; }
    .board-controls { order: -1; }
    .chess-coordinate-frame { grid-template-columns: 20px minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) 20px; }
    .opening-editor-grid { grid-template-columns: 1fr; }
    .opening-editor-board, .opening-tree-panel, .opening-reference-slot, .opening-details-panel { grid-column: 1; grid-row: auto; }
    .opening-tree-panel { max-height: none; }
    .opening-editor-mobile-tabs { display: grid; }
    .opening-side-section.mobile-panel-hidden { display: none; }
    .opening-side-section.mobile-panel-active { display: grid; }
    .opening-tree-panel.mobile-panel-hidden, .opening-details-panel.mobile-panel-hidden, .opening-reference-slot.mobile-panel-hidden { display: none; }
    .opening-tree-panel.mobile-panel-active, .opening-details-panel.mobile-panel-active, .opening-reference-slot.mobile-panel-active { display: block; }
    .opening-side-section + .opening-side-section { padding-top: 0; border-top: 0; }
    .opening-editor-grid.board-focus .opening-editor-side-column { display: none; }
    .opening-page-header { align-items: flex-start; flex-direction: column; }
    .deleted-repository-row { grid-template-columns: 1fr; }
    .stockfish-engine-options { grid-template-columns: 1fr; }
    .training-session-grid, .training-session-grid.board-focus, .training-session-header { grid-template-columns: 1fr; }

    .training-start-bar .primary-action { margin-left: 0; }
    .board-settings-layout { grid-template-columns: minmax(0, 1fr); }
    .board-settings-preview { position: static; width: min(100%, 480px); margin-inline: auto; }
    .board-notation-grid { grid-template-columns: minmax(0, 1fr); }
    .board-notation-card { min-height: 106px; }
    .opening-overview-dialog { max-height: 94dvh; border-radius: 1rem; }
    .cof-guide-steps, .cof-guide-review-timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cof-guide-practical-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .site-header { align-items: flex-start; }
    .site-header nav { flex-direction: column; text-align: right; }
    .language-selector-desktop .language-selector-name,
    .language-selector-desktop .language-selector-chevron { display: none; }
    .language-selector-desktop .language-selector-trigger { min-width: 44px; padding-inline: .45rem; }
    .language-selector-globe { display: none; }
    .language-modal-backdrop { align-items: end; padding: 0; }
    .language-modal { width: 100%; max-height: min(88dvh, 760px); border-radius: 24px 24px 0 0; padding-bottom: env(safe-area-inset-bottom); }
    .language-modal-header, .language-list { padding-inline: .9rem; }
    .language-search { margin-inline: .9rem; }
    .language-list { grid-template-columns: 1fr; }
    .board-settings-page { padding: .75rem .75rem 5rem; }
    .board-settings-header { gap: .25rem; }
    .board-settings-header h1 { font-size: clamp(1.75rem, 8vw, 2.25rem); }
    .board-settings-preview, .board-settings-controls > section { padding: .8rem; border-radius: 18px; }
    .board-preset-grid, .board-color-fields { grid-template-columns: 1fr; }
    .board-preset-card, .board-custom-heading, .board-piece-set-card { min-height: 64px; }
    .board-piece-set-card { grid-template-columns: minmax(0, 1fr) auto; }
    .board-piece-preview { grid-column: 1 / -1; width: 100%; justify-content: center; }
    .board-settings-actions { display: grid; bottom: .5rem; }
    .board-settings-actions .mud-button-root { width: 100%; min-height: 46px; }
    .opening-editor-header-actions { justify-content: flex-start; }
    .opening-editor-header-actions .primary-action, .opening-editor-header-actions .secondary-action { flex: 1 1 auto; justify-content: center; }
    .opening-board-toolbar { align-items: stretch; }
    .opening-board-toolbar label, .opening-board-toolbar .secondary-action { flex: 1 1 100%; }
    .opening-overview-summary { align-items: stretch; flex-direction: column; }
    .opening-overview-toolbar { align-items: stretch; flex-direction: column; }
    .opening-overview-toolbar .secondary-action { justify-content: center; }
    .opening-line-continuations { grid-template-columns: 1fr; }
    .opening-line-continuations button:nth-child(even) { border-left: 0; }
    .opening-line-continuations button:nth-child(n+2) { border-top: 1px solid var(--mud-palette-lines-default); }
    .opening-training-scope { grid-template-columns: 1fr; }
    .training-card-stats { grid-template-columns: 1fr; }
    .training-board-toolbar { align-items: stretch; flex-direction: column; }
    .training-board-toolbar select, .training-board-toolbar button { width: 100%; }

    .cof-guide-page { width: 100%; padding: .75rem .25rem 5rem; }
    .cof-guide-hero { grid-template-columns: 1fr; min-height: 0; border-radius: 22px; }
    .cof-guide-brand { min-height: 145px; padding-top: .7rem; }
    .cof-guide-brand img { width: 150px; height: 150px; }
    .cof-guide-hero-copy { padding: 1rem 1.15rem 1.35rem; text-align: center; }
    .cof-guide-hero-copy h1 { margin-inline: auto; font-size: clamp(1.85rem, 9vw, 2.45rem); }
    .cof-guide-hero-actions, .cof-guide-steps, .cof-guide-features, .cof-guide-review-timeline { display: grid; grid-template-columns: 1fr; }
    .cof-guide-steps article { min-height: 180px; }
    .cof-guide-spaced-review { padding: 18px 14px; border-radius: 18px; }
    .cof-guide-help { align-items: stretch; flex-direction: column; }
    .cof-guide-help .primary-action { justify-content: center; }
}

.app-shell-bar.mud-appbar,
.app-shell-bar .mud-toolbar { overflow: visible; }
.admin-quick-note { position: relative; display: flex; align-items: center; }
.admin-quick-note-toggle {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    gap: .35rem;
    padding: .3rem .75rem;
    border: 1px solid color-mix(in srgb, #60a5fa 64%, #ffffff33);
    border-radius: 999px;
    color: inherit;
    background: linear-gradient(135deg, #2563eb2e, #8b5cf629);
    font: inherit;
    font-size: .82rem;
    font-weight: 800;
    cursor: pointer;
}
.admin-quick-note-toggle .mud-icon-root { font-size: 18px; }
.admin-quick-note-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 2000;
    display: grid;
    width: min(320px, calc(100vw - 48px));
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--mud-palette-lines-default, #334155);
    border-radius: 16px;
    background: var(--mud-palette-surface, #0f172a);
    box-shadow: 0 16px 40px #02061766;
}
.admin-quick-note-panel label { display: grid; gap: 4px; color: var(--mud-palette-text-secondary, #94a3b8); font-size: .78rem; font-weight: 700; }
.admin-quick-note-panel select,
.admin-quick-note-panel textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--mud-palette-lines-inputs, #334155);
    border-radius: 10px;
    color: var(--mud-palette-text-primary, #f8fafc);
    background: var(--mud-palette-background, #020617);
    font: inherit;
}
.admin-quick-note-panel textarea { resize: vertical; min-height: 96px; }
.admin-quick-note-error { margin: 0; color: #ef4444; font-size: .78rem; }
.admin-quick-note-send {
    min-height: 40px;
    border: 0;
    border-radius: 10px;
    color: #fff;
    background: var(--mud-palette-primary, #2563eb);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}
.admin-quick-note-send:disabled { opacity: .55; cursor: default; }

@media (max-width: 959.98px) {
    .app-shell-desktop-actions { display: none; }
    .app-shell-mobile-only { display: block; }
    .app-shell-mobile-language { display: flex; margin-inline-end: .2rem; }
    .app-shell-bar .mud-toolbar { min-width: 0; padding-right: 8px; padding-left: 8px; }
    .app-shell-title { font-size: 1rem; }
    .app-shell-content { padding-right: 8px !important; padding-left: 8px !important; }
}

@media (min-width: 960px) and (max-width: 1399.98px) {
    .app-shell-compact-action.mud-button-root { min-width:44px; min-height:44px; padding:8px; margin-inline-end:.25rem !important; }
    .app-shell-compact-action .app-shell-action-text { display:none; }
    .app-shell-compact-action .mud-button-icon-start { margin:0; }
    .app-plan-badge { flex: 0 0 auto; padding-inline-end: .28rem; }
    .app-plan-badge strong { display: none; }
    .app-account-badges-mobile .app-plan-badge strong { display: block; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}


[hidden] { display: none !important; }
.app-shell-page { min-height: calc(100vh - 10rem); scroll-margin-top: 76px; }
.app-shell-page:focus { outline: none; }
.app-shell-brand { color: inherit; text-decoration: none; font-weight: 700; }
.app-shell-brand:focus-visible { outline: 2px solid var(--mud-palette-primary); outline-offset: 4px; border-radius: 4px; }
.app-skip-link { position: fixed; inset-inline-start: 1rem; top: .5rem; z-index: 2000; padding: .7rem 1rem; border-radius: 10px; color: var(--mud-palette-primary-text); background: var(--mud-palette-primary); transform: translateY(-150%); }
.app-skip-link:focus { transform: none; }
.app-shell-page [id] { scroll-margin-top: 76px; }
body.app-navigation-open { overflow: hidden; }
.account-card { color: var(--mud-palette-text-primary, #f4f5f7); background: var(--mud-palette-surface, #10141ddd); border-color: var(--mud-palette-lines-default, #ffffff20); }
.account-card label:not(.check-row) { color: var(--mud-palette-text-primary, #dfe2e8); }
.account-card input, .account-card textarea, .account-card select { color: var(--mud-palette-text-primary, #f4f5f7); background: var(--mud-palette-background, #07090e); border-color: var(--mud-palette-lines-inputs, #ffffff2d); }
.account-card label span, .account-card .field-help { color: var(--mud-palette-text-secondary, #969daa); }
.game-analysis-queue {
    position: fixed; z-index: 1200; right: max(1rem, env(safe-area-inset-right)); bottom: max(1rem, env(safe-area-inset-bottom)); display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: .55rem;
    width: min(430px, calc(100vw - 2rem)); padding: .7rem .8rem; border: 1px solid #3b82f6;
    border-radius: 14px; color: #eaf2ff; background: #0f1b31f2; box-shadow: 0 16px 40px #02061799;
}
.game-analysis-queue > div { display: grid; gap: .1rem; }
.game-analysis-queue-copy { min-width: 0; overflow-wrap: anywhere; }
.game-analysis-queue span { color: #aabbd2; font-size: .75rem; }
.game-analysis-queue button { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid #334155; border-radius: 9px; color: #e2e8f0; background: #172033; cursor: pointer; }
.game-analysis-queue-progress { display: grid; gap: .25rem; margin-top: .35rem; }
.game-analysis-queue-progress > div { position: relative; height: 7px; overflow: hidden; border-radius: 999px; background: #334155; }
.game-analysis-queue-progress > div > i { position: absolute; inset: 0 auto 0 0; min-width: 3px; overflow: hidden; border-radius: inherit; background: linear-gradient(90deg, #38bdf8, #6366f1); transition: width .3s ease; }
.game-analysis-queue-progress > div > i::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, transparent 15%, #fff8 48%, transparent 82%); transform: translateX(-100%); animation: game-analysis-progress-shimmer 1.4s linear infinite; }
.game-analysis-queue-progress small { display: flex; justify-content: space-between; gap: .7rem; color: #aabbd2; font-size: .69rem; }
.game-analysis-queue-progress small strong { color: #e0f2fe; }
@keyframes game-analysis-progress-shimmer { to { transform: translateX(100%); } }
@media (max-width: 959.98px) {
    /* Keep the queue in the page flow: its height also grows with translated errors. */
    .game-analysis-queue {
        position: static; z-index: auto;
        width: calc(100% - env(safe-area-inset-left) - env(safe-area-inset-right));
        margin: 1rem env(safe-area-inset-right) 0 env(safe-area-inset-left);
        padding-bottom: max(.7rem, env(safe-area-inset-bottom));
    }
}
@media (max-width: 600px) {
    .game-analysis-queue-progress small { align-items: flex-start; flex-direction: column; gap: .05rem; }
}
@media (prefers-reduced-motion: reduce) { .game-analysis-queue-progress > div > i::after { animation: none; } }
.app-legal-footer {
    margin-top: 3rem;
    padding: 1.35rem .5rem 1.75rem;
    border-top: 1px solid var(--mud-palette-lines-default);
    color: var(--mud-palette-text-secondary);
    font-size: .82rem;
    text-align: center;
}
.app-legal-footer nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .55rem 1rem;
    margin-bottom: .8rem;
}
.app-legal-footer a { display: inline-flex; align-items: center; min-height: 44px; color: inherit; text-decoration: none; }
.app-legal-footer a:hover, .app-legal-footer a:focus-visible { text-decoration: underline; }


/* Public legal and consumer-contract pages. */
.legal-page { padding-block: clamp(1.25rem, 3vw, 2.5rem) 3rem; }
.legal-hero {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
    margin-bottom: 1.5rem;
    padding: clamp(1rem, 3vw, 1.6rem);
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 20px;
    background: color-mix(in srgb, var(--mud-palette-surface) 94%, var(--mud-palette-primary) 6%);
}
.legal-hero-icon, .legal-section-icon {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border-radius: 14px;
    color: var(--mud-palette-primary);
    background: color-mix(in srgb, var(--mud-palette-primary) 14%, transparent);
}
.legal-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-block: 1rem 1.5rem; }
.legal-card, .legal-license-box {
    padding: 1rem 1.1rem;
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 15px;
    background: var(--mud-palette-surface);
}
.legal-license { line-height: 1.65; }
.legal-license > h2, .legal-license > .mud-typography-h5 { margin-top: 2rem; }
.legal-highlight {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
    padding: clamp(1rem, 3vw, 1.5rem);
    border: 3px solid var(--mud-palette-primary);
    border-radius: 18px;
    background: color-mix(in srgb, var(--mud-palette-primary) 10%, var(--mud-palette-surface));
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--mud-palette-primary) 24%, transparent);
}
.legal-highlight > .mud-icon-root { margin-top: .25rem; color: var(--mud-palette-primary); font-size: 2rem; }
.legal-code-block { margin: .75rem 0; border: 1px solid var(--mud-palette-lines-default); border-radius: 12px; background: var(--mud-palette-surface); }
.legal-code-block summary { padding: .9rem 1rem; cursor: pointer; font-weight: 750; }
.legal-code-block[open] summary { border-bottom: 1px solid var(--mud-palette-lines-default); }
.legal-code-block p { padding-inline: 1rem; }
.legal-links { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; }
.legal-section-heading { display: flex; align-items: center; gap: .8rem; margin-bottom: 1rem; }
.legal-updated { display: block; margin-top: 2rem; color: var(--mud-palette-text-secondary); }
.legal-warning { border-color: color-mix(in srgb, var(--mud-palette-warning) 55%, var(--mud-palette-lines-default)); }
.withdrawal-model { margin-block: 1.25rem; }
@media (max-width: 700px) {
    .legal-grid { grid-template-columns: 1fr; }
    .legal-hero, .legal-highlight { grid-template-columns: 1fr; }
}
/* Global recovery surface for unhandled Blazor rendering failures. */
.club-price-cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr)); gap:16px; margin-top:20px; }
.club-price-cards article { padding:20px; border:1px solid var(--mud-palette-lines-default); border-radius:14px; background:var(--mud-palette-background); }
.club-price-cards h3 { font-size:1.25rem; font-weight:700; margin-bottom:16px; }
.club-price-cards dl div { display:flex; justify-content:space-between; gap:12px; padding:8px 0; }
.club-price-cards dd { font-weight:650; }
.club-price-cards dl div:last-child { border-top:1px solid var(--mud-palette-lines-default); }
.club-print-page { max-width:1000px; margin:24px auto; padding:12px; }
.club-print-toolbar { display:flex; flex-wrap:wrap; gap:12px; margin-bottom:24px; }
@media (max-width:600px) {
    .mud-dialog:has(.commercial-wizard) { width:calc(100% - 16px); max-width:none; max-height:calc(100dvh - 16px); margin:8px; }
    .mud-dialog:has(.club-dialog-content) { width:calc(100% - 16px); max-width:none; max-height:calc(100dvh - 16px); margin:8px; }
    .mud-dialog:has(.club-dialog-content) .mud-dialog-content { padding:12px; }
    .mud-dialog:has(.club-dialog-content) .mud-dialog-title { padding:12px 16px; }
    .mud-dialog:has(.club-dialog-content) .mud-dialog-actions { flex-wrap:wrap; }
    .mud-dialog:has(.commercial-wizard) .mud-dialog-content { padding:12px; }
    .mud-dialog:has(.commercial-wizard) .mud-dialog-title { padding:12px 16px 0; }
}
@media print {
    @page { size:A4; margin:15mm; }
    body:has(.club-print-page) { background:white !important; }
    body:has(.club-print-page) .mud-appbar, body:has(.club-print-page) .mud-drawer,
    body:has(.club-print-page) .club-print-toolbar, body:has(.club-print-page) .mud-overlay,
    body:has(.club-print-page) .mud-snackbar-provider, body:has(.club-print-page) .app-legal-footer { display:none !important; }
    body:has(.club-print-page) .mud-main-content { margin:0 !important; padding:0 !important; }
    .club-print-page { max-width:none; margin:0; padding:0; }
}
.global-error-fallback {
    display: grid;
    justify-items: start;
    gap: 1rem;
    width: min(100% - 2rem, 720px);
    margin: clamp(5rem, 14vh, 9rem) auto;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 20px;
    background: var(--mud-palette-surface);
    box-shadow: 0 18px 45px rgba(8, 13, 29, .2);
}
.global-error-fallback button {
    min-height: 42px;
    padding: .65rem 1rem;
    border: 1px solid var(--mud-palette-primary);
    border-radius: 10px;
    color: var(--mud-palette-primary-text);
    background: var(--mud-palette-primary);
    font-weight: 750;
    cursor: pointer;
}


/* UX-006 — auth CTA touch targets (global; Mud size classes beat scoped min-height) */
.cos-touch-cta.mud-button-root,
.login-page .mud-button-filled.mud-button-root,
.signup-page .mud-button-filled.mud-button-root,
.feedback-page .mud-button-filled.mud-button-root {
    min-height: 44px !important;
    height: auto !important;
    box-sizing: border-box !important;
    padding-top: .55rem !important;
    padding-bottom: .55rem !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
}
.cos-touch-cta .mud-button-label { white-space: normal; overflow-wrap: anywhere; }

/* Shared account recovery pages. */

.forgot-page {
    box-sizing: border-box;
    width: 100%;
    padding: clamp(1rem, 5vh, 3rem) 1rem 3rem;
}
.forgot-card {
    overflow: hidden;
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: 24px !important;
    background: var(--mud-palette-surface) !important;
    box-shadow: 0 20px 55px rgba(15,23,42,.16) !important;
}
.forgot-header {
    display: grid;
    grid-template-columns: auto minmax(0,1fr);
    gap: 1rem;
    padding: clamp(1.4rem, 4vw, 2rem);
    color: #fff;
    background:
        radial-gradient(circle at 90% 10%, rgba(255,255,255,.16), transparent 34%),
        linear-gradient(130deg,#14233c 0%,#3c246d 52%,#8a3f74 100%);
}
.forgot-header h1, .forgot-header p { margin: 0; }
.forgot-header p { margin-top: .45rem; max-width: 55ch; opacity: .86; }
.forgot-icon {
    display: grid; place-items: center; width: 52px; height: 52px;
    border: 1px solid rgba(255,255,255,.25); border-radius: 15px;
    background: rgba(255,255,255,.12);
}
.forgot-eyebrow { display: block; margin-bottom: .25rem; font-size: .7rem; font-weight: 900; letter-spacing: .12em; opacity: .8; }
.forgot-alert { margin: 1.25rem 1.25rem 0; }
.forgot-form { display: grid; gap: 1rem; padding: 1.5rem; }
.forgot-form .mud-button-root { min-height: 48px; }
.forgot-footer .mud-button-root { min-height: 44px; }
.forgot-footer {
    display: flex; justify-content: space-between; align-items: center; gap: .5rem;
    padding: 0 1rem 1rem;
}
@media (max-width: 520px) {
    .forgot-page { padding: .75rem .5rem 2rem; }
    .forgot-card { border-radius: 18px !important; }
    .forgot-header { grid-template-columns: 1fr; padding: 1.15rem; }
    .forgot-icon { width: 44px; height: 44px; }
    .forgot-form { padding: 1rem; }
    .forgot-footer { flex-direction: column; align-items: stretch; }
    .forgot-footer .mud-button-root { width: 100%; }
}

.chess-board-shell.with-evaluation { display:grid; grid-template-columns:46px minmax(0,1fr); gap:6px; align-items:stretch; }
.chess-board-evaluation { position:relative; min-height:0; }
.chess-board-evaluation[hidden] { display:none; }
.chess-board-evaluation .evaluation-bar { position:absolute; inset:0; min-height:0; }