:root{--bg:#151f1cff;--bg-gradient:radial-gradient(ellipse at top,#0f5c43 0%,#0b3d2e 55%,#072a20 100%);--surface:#f6efe1;--surface-alt:#eee3cc;--ink:#23241f;--ink-soft:#5a5648;--accent:#c88a3a;--accent-strong:#a86a1f;--accent-contrast:#fff;--line:#d8c8a0;--tile-face:#fbf7ec;--tile-edge:#d9c9a3;--pip:#2a2620;--danger:#b5432e;--success:#3c8a5a;--board-felt:#0e4a37;--board-line:#ffffff14;--shadow:#0a140f59;--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--focus-ring:#ffd77a;--font-display:Georgia,'Palatino Linotype','Book Antiqua','Times New Roman',serif;--font-body:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;--motion-fast:140ms;--motion-med:320ms;--motion-slow:520ms;--motion-ease:cubic-bezier(.22,.9,.32,1)}
[data-theme="dark"]{--bg:#0a0716;--bg-gradient:radial-gradient(ellipse at top,#1a1140 0%,#0a0716 60%,#050310 100%);--surface:#150f2e;--surface-alt:#1d1640;--ink:#eef0ff;--ink-soft:#9a93c9;--accent:#37f0d8;--accent-strong:#ff5ec4;--accent-contrast:#050310;--line:#372a63;--tile-face:#1b1440;--tile-edge:#4f3f8f;--pip:#37f0d8;--danger:#ff5e7a;--success:#6bffb0;--board-felt:#120a2e;--board-line:#37f0d81f;--shadow:#0009;--focus-ring:#ff5ec4}
[data-colorblind="true"]{--pip:currentColor}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:var(--font-body);background:var(--bg-gradient);color:var(--ink);min-height:100vh;-webkit-tap-highlight-color:transparent;overflow-x:hidden;transition:background var(--motion-med) var(--motion-ease),color var(--motion-med) var(--motion-ease)}
.skip-link{position:absolute;left:-999px;top:0;z-index:999;background:var(--accent);color:var(--accent-contrast);padding:10px 16px;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px;border-radius:4px}
.app{display:flex;flex-direction:column;min-height:100vh}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;background:#0000002e;backdrop-filter:blur(6px);position:sticky;top:0;z-index:40}
.brand{display:flex;align-items:center;gap:10px}
.brand h1{font-family:var(--font-display);font-size:1.25rem;margin:0;color:var(--accent-contrast,#fff);color:#fdf6e3;letter-spacing:.02em}
[data-theme="dark"] .brand h1{color:var(--accent);text-shadow:0 0 12px #37f0d880}
.brand-tile{width:26px;height:26px;background:var(--tile-face);border:1.5px solid var(--tile-edge);border-radius:5px;display:flex;align-items:center;justify-content:center;gap:2px;box-shadow:0 2px 4px var(--shadow)}
.brand-tile .pip{width:4px;height:4px;border-radius:50%;background:var(--pip)}
.topbar-right{display:flex;align-items:center;gap:8px}
.icon-btn{width:38px;height:38px;border-radius:50%;border:none;background:#ffffff1a;color:#fdf6e3;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--motion-fast) ease,transform var(--motion-fast) ease}
[data-theme="dark"] .icon-btn{color:var(--accent);background:#37f0d814}
.icon-btn:hover{background:#fff3;transform:translateY(-1px)}
[data-theme="dark"] .icon-btn:hover{background:#37f0d82e}
.timer-display{display:flex;align-items:center;gap:5px;color:#fdf6e3;font-variant-numeric:tabular-nums;font-size:.9rem;background:#ffffff14;padding:6px 10px;border-radius:20px}
[data-theme="dark"] .timer-display{color:var(--accent);background:#37f0d814}
.btn{font-family:var(--font-body);font-size:.95rem;font-weight:600;padding:12px 20px;border-radius:var(--radius-md);border:none;cursor:pointer;transition:transform var(--motion-fast) ease,box-shadow var(--motion-fast) ease,background var(--motion-fast) ease}
.btn:active{transform:scale(0.97)}
.btn-block{width:100%}
.btn-sm{padding:8px 14px;font-size:.85rem}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:var(--accent-contrast);box-shadow:0 6px 18px -6px var(--shadow)}
.btn-primary:hover{box-shadow:0 8px 22px -6px var(--shadow);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--accent-contrast)}
[data-theme="dark"] .btn-ghost{color:var(--ink);border-color:var(--tile-edge)}
.btn-ghost:hover{background:#ffffff0f}
.btn-danger{background:transparent;border:1.5px solid var(--danger);color:var(--danger);margin-top:8px}
.btn-danger:hover{background:#b5432e1a}
.screen{flex:1;display:flex}
.start-screen{align-items:center;justify-content:center;padding:24px 16px}
.start-card{background:var(--surface);border-radius:var(--radius-lg);padding:28px 26px 22px;max-width:420px;width:100%;box-shadow:0 30px 60px -20px var(--shadow);border:1px solid var(--line)}
.start-card h2{font-family:var(--font-display);margin:0 0 4px;font-size:1.6rem;color:var(--ink)}
.start-sub{margin:0 0 20px;color:var(--ink-soft);font-size:.92rem}
.field{margin-bottom:18px}
.field label{display:block;font-size:.78rem;font-weight:700;color:var(--ink-soft);margin-bottom:8px;letter-spacing:.02em}
.segmented{display:flex;background:var(--surface-alt);border-radius:var(--radius-md);padding:4px;gap:4px}
.seg-btn{flex:1;padding:10px 6px;border:none;background:transparent;border-radius:8px;cursor:pointer;font-weight:600;font-size:.85rem;color:var(--ink-soft);transition:all var(--motion-fast) ease}
.seg-btn.active{background:var(--accent);color:var(--accent-contrast);box-shadow:0 3px 10px -3px var(--shadow)}
.howto{margin-top:18px;color:var(--ink-soft);font-size:.85rem}
.howto summary{cursor:pointer;font-weight:600;color:var(--ink)}
.howto ol{padding-left:20px;margin:10px 0 0}
.howto li{margin-bottom:6px}
.game-screen{flex-direction:column;padding:10px 10px 0;gap:8px;max-width:1100px;margin:0 auto;width:100%}
.opponents-row{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;padding:4px 0}
.opponent-card{background:#00000038;border-radius:var(--radius-md);padding:8px 14px;display:flex;align-items:center;gap:10px;color:#fdf6e3;min-width:140px;border:1.5px solid transparent;transition:border-color var(--motion-fast) ease,box-shadow var(--motion-fast) ease}
[data-theme="dark"] .opponent-card{color:var(--ink)}
.opponent-card.active-turn{border-color:var(--accent);box-shadow:0 0 0 3px #c88a3a40}
[data-theme="dark"] .opponent-card.active-turn{box-shadow:0 0 14px #37f0d880}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--accent-strong);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}
.avatar.you{background:var(--success)}
.opp-meta{display:flex;flex-direction:column;line-height:1.3}
.opp-name{font-weight:700;font-size:.85rem}
.opp-sub{font-size:.72rem;opacity:.8}
.board-wrap{background:var(--board-felt);border-radius:var(--radius-lg);padding:10px;box-shadow:inset 0 2px 20px #0006 0 10px 30px -10px var(--shadow);position:relative;border:6px solid #0003}
[data-theme="dark"] .board-wrap{border-color:#37f0d81a}
.board-controls{display:flex;align-items:center;gap:10px;margin-bottom:8px;color:#cfe8dc;font-size:.8rem}
[data-theme="dark"] .board-controls{color:var(--ink-soft)}
.round-label{font-weight:700}
.boneyard-count{display:flex;align-items:center;gap:4px;margin-left:auto;opacity:.85}
.board-controls .btn-sm{color:#fff;border-color:#ffffff59}
[data-theme="dark"] .board-controls .btn-sm{color:var(--accent);border-color:var(--tile-edge)}
.board-scroll{overflow:auto;min-height:180px;max-height:46vh;border-radius:var(--radius-md);background-image:linear-gradient(var(--board-line) 1px,transparent 1px),linear-gradient(90deg,var(--board-line) 1px,transparent 1px);background-size:24px 24px;padding:20px}
.board-track{display:flex;flex-wrap:wrap;align-items:center;gap:4px;min-height:100%;width:max-content;margin:auto}
.board-empty-hint{color:#ffffff80;font-size:.95rem;padding:40px;text-align:center;width:100%}
.turn-banner{text-align:center;color:#fdf6e3;font-weight:700;font-size:.95rem;padding:8px 0 2px;min-height:1.4em}
[data-theme="dark"] .turn-banner{color:var(--accent)}
.domino{background:var(--tile-face);border:2px solid var(--tile-edge);border-radius:7px;box-shadow:0 3px 8px var(--shadow);display:flex;position:relative;color:var(--pip);flex-shrink:0;animation:tile-in var(--motion-med) var(--motion-ease)}
@keyframes tile-in {
from{opacity:0;transform:scale(0.7) translateY(8px)}
to{opacity:1;transform:scale(1) translateY(0)}
}
.reduce-motion .domino{animation:none}
.domino.horizontal{flex-direction:row;width:68px;height:34px}
.domino.horizontal .half{width:50%;display:flex;align-items:center;justify-content:center}
.domino.horizontal .divider{width:2px;background:var(--tile-edge);align-self:stretch;margin:4px 0}
.domino.vertical{flex-direction:column;width:34px;height:68px}
.domino.vertical .half{height:50%;display:flex;align-items:center;justify-content:center}
.domino.vertical .divider{height:2px;background:var(--tile-edge);align-self:stretch;margin:0 4px}
.pip-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);width:26px;height:26px;gap:1px;padding:2px}
.domino.vertical .pip-grid{width:26px;height:26px}
.pip-dot{border-radius:50%;width:5px;height:5px;background:var(--pip);align-self:center;justify-self:center}
[data-theme="dark"] .pip-dot{box-shadow:0 0 4px var(--pip)}
.pip-number{font-size:.95rem;font-weight:800}
.domino .cb-label{position:absolute;font-size:8px;font-weight:800;opacity:.6;bottom:1px;right:2px}
@keyframes pulse-target {
0%,100%{outline-color:var(--accent)}
50%{outline-color:transparent}
}
.player-panel{background:#0003;border-radius:var(--radius-lg);padding:10px 12px 14px;margin:4px 0 14px}
.player-panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;color:#fdf6e3}
[data-theme="dark"] .player-panel-head{color:var(--ink)}
.player-id{display:flex;align-items:center;gap:10px;font-weight:700}
.player-score{font-size:.82rem;opacity:.85;font-weight:600}
.action-buttons{display:flex;gap:8px}
.action-buttons .btn{color:#fff;border-color:#fff6}
[data-theme="dark"] .action-buttons .btn{color:var(--accent);border-color:var(--tile-edge)}
.hand-scroll{overflow-x:auto;overflow-y:hidden;padding:6px 2px 10px}
.hand-tiles{display:flex;gap:8px;min-height:72px;align-items:flex-end;justify-content:center;width:max-content;min-width:100%}
.domino.hand-tile{cursor:grab;transition:transform var(--motion-fast) ease,box-shadow var(--motion-fast) ease}
.domino.hand-tile:hover{transform:translateY(-6px);box-shadow:0 10px 16px -6px var(--shadow)}
.domino.hand-tile.selected{transform:translateY(-12px);box-shadow:0 0 0 3px var(--accent),0 10px 20px -6px var(--shadow)}
.domino.hand-tile.unplayable{opacity:.4;cursor:not-allowed}
.domino.hand-tile.dragging{opacity:.3}
.modal-backdrop{position:fixed;inset:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:100;padding:16px;animation:fade-in var(--motion-fast) ease}
@keyframes fade-in {
from{opacity:0}
to{opacity:1}
}
.modal{background:var(--surface);border-radius:var(--radius-lg);max-width:440px;width:100%;max-height:88vh;overflow-y:auto;padding:20px 22px 24px;box-shadow:0 40px 80px -20px #00000080;color:var(--ink);animation:modal-in var(--motion-med) var(--motion-ease)}
@keyframes modal-in {
from{opacity:0;transform:translateY(16px) scale(0.97)}
to{opacity:1;transform:translateY(0) scale(1)}
}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.modal-head h2{font-family:var(--font-display);margin:0;font-size:1.3rem}
.modal-head .icon-btn{background:var(--surface-alt);color:var(--ink)}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.setting-row:last-of-type{border-bottom:none}
.setting-title{font-weight:700;font-size:.92rem}
.setting-desc{font-size:.78rem;color:var(--ink-soft);margin-top:2px}
.switch{position:relative;display:inline-block;width:46px;height:26px;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;cursor:pointer;inset:0;background:var(--surface-alt);border:1.5px solid var(--line);border-radius:999px;transition:background var(--motion-fast) ease}
.slider::before{content:"";position:absolute;height:18px;width:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:transform var(--motion-fast) ease;box-shadow:0 1px 3px #0000004d}
.switch input:checked + .slider{background:var(--accent);border-color:var(--accent)}
.switch input:checked + .slider::before{transform:translateX(20px)}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.stat-box{background:var(--surface-alt);border-radius:var(--radius-md);padding:14px;text-align:center}
.stat-num{font-size:1.6rem;font-weight:800;color:var(--accent-strong)}
[data-theme="dark"] .stat-num{color:var(--accent)}
.stat-label{font-size:.75rem;color:var(--ink-soft);margin-top:2px}
.gameover-modal{text-align:center}
.gameover-modal h2{font-family:var(--font-display);font-size:1.5rem;margin-bottom:6px}
.gameover-sub{color:var(--ink-soft);margin-bottom:16px}
.scoreboard{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.score-row{display:flex;justify-content:space-between;padding:10px 14px;background:var(--surface-alt);border-radius:var(--radius-sm);font-weight:600}
.score-row.winner{background:var(--accent);color:var(--accent-contrast)}
.gameover-actions{display:flex;flex-direction:column;gap:10px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--surface);padding:10px 18px;border-radius:999px;font-size:.85rem;font-weight:600;opacity:0;pointer-events:none;transition:opacity var(--motion-med) ease,transform var(--motion-med) ease;z-index:200;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.seo-content{max-width:760px;margin:30px auto 10px;padding:0 18px 30px;color:#ffffffd9;font-size:.85rem;line-height:1.6}
.seo-content h2,.seo-content h3{font-family:var(--font-display);color:#fdf6e3}
[data-theme="dark"] .seo-content h2,[data-theme="dark"] .seo-content h3{color:var(--accent)}
.seo-content dt{font-weight:700;margin-top:10px;color:#fdf6e3}
[data-theme="dark"] .seo-content dt{color:var(--ink)}
.seo-content dd{margin:2px 0 0}
@media (max-width: 640px) {
.brand h1{font-size:1.05rem}
.start-card{padding:22px 18px 18px}
.board-scroll{max-height:38vh}
.opponent-card{min-width:100px;padding:6px 10px}
.domino.horizontal{width:56px;height:28px}
.domino.vertical{width:28px;height:56px}
.pip-grid{width:20px;height:20px}
.pip-dot{width:4px;height:4px}
}
@media (prefers-reduced-motion: reduce) {
.domino,.modal,.modal-backdrop{animation:none!important}
.end-cap.active,.domino.last-placed,.opp-thinking span{animation:none!important}
}
.reduce-motion .domino,.reduce-motion .modal,.reduce-motion .modal-backdrop,.reduce-motion .end-cap.active,.reduce-motion .domino.last-placed,.reduce-motion .opp-thinking span{animation:none!important}
.board-scroll,.hand-scroll,.modal{scrollbar-width:thin;scrollbar-color:var(--accent) transparent}
.board-scroll::-webkit-scrollbar,.hand-scroll::-webkit-scrollbar,.modal::-webkit-scrollbar{height:6px;width:6px}
.board-scroll::-webkit-scrollbar-track,.hand-scroll::-webkit-scrollbar-track,.modal::-webkit-scrollbar-track{background:transparent}
.board-scroll::-webkit-scrollbar-thumb,.hand-scroll::-webkit-scrollbar-thumb,.modal::-webkit-scrollbar-thumb{background:var(--accent);border-radius:10px}
.board-scroll::-webkit-scrollbar-thumb:hover,.hand-scroll::-webkit-scrollbar-thumb:hover,.modal::-webkit-scrollbar-thumb:hover{background:var(--accent-strong)}
.end-cap{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:34px;height:60px;border-radius:10px;border:2px dashed transparent;opacity:0;pointer-events:none;transition:opacity var(--motion-fast) ease,border-color var(--motion-fast) ease,background var(--motion-fast) ease,transform var(--motion-fast) ease;color:var(--accent);font-size:.7rem;font-weight:700;cursor:pointer}
.end-cap.active{opacity:1;pointer-events:auto;border-color:var(--accent);animation:pulse-target 1s ease-in-out infinite}
.end-cap.hover{background:#c88a3a40;transform:scale(1.12);animation:none;border-style:solid}
[data-theme="dark"] .end-cap.hover{background:#37f0d833}
.end-cap.open{width:auto;min-width:140px;height:70px;padding:0 18px;border-color:#ffffff59;opacity:1;pointer-events:auto;color:#fff9;text-align:center}
[data-theme="dark"] .end-cap.open{border-color:var(--tile-edge);color:var(--ink-soft)}
.end-cap.open.active{border-color:var(--accent);color:var(--accent)}
.domino.last-placed{box-shadow:0 0 0 3px var(--accent),0 3px 10px var(--shadow);animation:last-placed-glow 1.4s ease-out}
@keyframes last-placed-glow {
0%{box-shadow:0 0 0 3px var(--accent),0 0 18px 6px var(--accent)}
100%{box-shadow:0 0 0 3px var(--accent),0 3px 10px var(--shadow)}
}
.drag-clone{position:fixed;z-index:500;pointer-events:none;opacity:.92;transform:scale(1.08) rotate(-3deg);box-shadow:0 18px 30px -8px #00000080;transition:none!important}
.domino.dragging-source{opacity:.35}
.opp-thinking{display:inline-flex;gap:3px;margin-left:4px;vertical-align:middle}
.opp-thinking span{width:4px;height:4px;border-radius:50%;background:var(--accent);animation:think-bounce 1s infinite ease-in-out}
.opp-thinking span:nth-child(2){animation-delay:.15s}
.opp-thinking span:nth-child(3){animation-delay:.3s}
@keyframes think-bounce {
0%,80%,100%{transform:translateY(0);opacity:.4}
40%{transform:translateY(-4px);opacity:1}
}
.hand-toolbar{display:flex;justify-content:flex-end;padding:0 2px 4px}
[hidden]{display:none!important}
#shareBtn{display:none}