:root{--bg: #123024;--ink: #211a17;--tomato: #e8442f;--tomato-dark: #9f1b12;--gold: #ffd60a;--paper: #fffaf5;--red: #e23b2e;--orange: #f28c28;--yellow: #ffd60a;--green: #2f9e5a;--blue: #2d7ff9}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{background-color:var(--bg);background-image:url(./game-background-CtkLvApy.jpg);background-size:cover;background-position:center;background-attachment:fixed;color:var(--ink);font-family:Segoe UI,system-ui,-apple-system,PingFang SC,sans-serif}.puzzle-shell{width:min(1080px,100%);min-height:100dvh;margin:0 auto;padding:18px 16px 28px;display:flex;flex-direction:column;gap:14px}.topbar{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;padding:12px 14px;background:#fffaf5f0;border:2px solid rgba(217,45,32,.75);border-radius:10px;box-shadow:0 8px 22px #081e1052;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-icon{width:52px;height:52px;border-radius:8px;object-fit:cover;background:#ffe9e3;border:1px solid rgba(217,45,32,.2)}.brand-copy{min-width:0}.brand-copy h1{margin:0;font-size:1.35rem;font-weight:900;line-height:1.1;color:var(--tomato-dark)}.brand-copy p{margin:2px 0 0;font-size:.78rem;font-weight:700;color:#7a5545}.round-meta{display:flex;align-items:center;justify-content:flex-end;gap:8px}.move-label,.state-label,.mode-badge,.timer-pill{display:inline-flex;align-items:center;border-radius:999px;padding:6px 10px;font-size:.78rem;font-weight:900;white-space:nowrap}.move-label{background:#e7f3e9;color:#1d5f36}.timer-pill{background:#fff3bf;color:#7a4a00;font-variant-numeric:tabular-nums}.state-label{background:#eef6ff;color:var(--blue)}.state-label.is-done{background:#fff3bf;color:#7a4a00}.recent-records{display:flex;align-items:center;flex-wrap:wrap;gap:10px 14px;padding:10px 14px;background:#fffaf5e6;border:1px solid rgba(217,45,32,.25);border-radius:10px}.recent-head{display:flex;align-items:center;gap:8px}.recent-head h2{margin:0;font-size:.86rem;font-weight:900;color:var(--tomato-dark);white-space:nowrap}.recent-list{display:flex;flex:1;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px;list-style:none;margin:0;padding:0}.recent-item{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:#fff;border:1px solid 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rgba(122,74,0,.3);color:#7a4a00;font-size:.78rem;font-weight:900;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mode-badge{background:#e7f3e9;color:#1d5f36}.timer-display{margin:2px auto 12px;padding:12px 10px;border-radius:10px;background:#fff3bf99;border:2px dashed rgba(122,74,0,.35);color:var(--tomato-dark);font-size:2.6rem;font-weight:900;font-variant-numeric:tabular-nums;letter-spacing:0;text-align:center}.board{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px;aspect-ratio:1;border-radius:10px;background:#0d2617d1;padding:8px}.board.is-solved{outline:4px solid var(--gold);box-shadow:0 0 0 7px #ffd60a59}.cell{border:2px solid rgba(255,255,255,.55);border-radius:8px;cursor:pointer;box-shadow:inset 0 -5px #00000029,0 3px 8px #00000047}.cell:hover{filter:brightness(1.08)}.cell.is-selected{outline:4px solid #fff;outline-offset:-4px;box-shadow:0 0 0 4px var(--gold),inset 0 -5px #00000029;z-index:2}.cell.is-swapped{animation:cell-pop .24s ease}.color-0{background:var(--red)}.color-1{background:var(--orange)}.color-2{background:var(--yellow)}.color-3{background:var(--green)}.color-4{background:var(--blue)}.goal-caption{min-height:22px;margin-bottom:12px;text-align:center;font-size:.86rem;font-weight:900;color:#5f3d30}.goal-controls{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.leaderboard{margin-top:16px;padding-top:14px;border-top:2px dashed rgba(217,45,32,.3)}.leaderboard-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}.leaderboard-head h3{margin:0;font-size:.94rem;font-weight:900;color:var(--tomato-dark)}.leaderboard-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:280px;overflow-y:auto}.leaderboard-row{display:grid;grid-template-columns:26px minmax(0,1fr) auto 22px;align-items:center;gap:8px;padding:7px 9px;border-radius:8px;background:#fff;border:1px solid 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18px;border-radius:8px;background:var(--tomato-dark);border:2px solid #fff;color:#fff;font-weight:900;box-shadow:0 10px 26px #00000059;opacity:0;pointer-events:none;transform:translate(-50%,14px);transition:opacity .18s ease,transform .18s ease}.toast.is-showing{opacity:1;transform:translate(-50%)}@keyframes cell-pop{0%{transform:scale(.84)}60%{transform:scale(1.08)}to{transform:scale(1)}}@media (max-width: 820px){.workspace{grid-template-columns:1fr}}@media (max-width: 520px){.puzzle-shell{padding:12px 10px 20px}.topbar{grid-template-columns:1fr}.round-meta{justify-content:flex-start}.recent-records{align-items:flex-start}.recent-list{justify-content:flex-start}.board{gap:5px;padding:6px}.cell{border-radius:6px}.goal-controls{flex-direction:column}}