.game-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:28px;display:flex}.game-head h1{font-size:1.9rem;font-weight:700}.game-head p{color:var(--ink-soft);font-size:.95rem}.controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.diff-group{gap:8px;display:flex}.diff-btn{font-family:var(--font-inter), sans-serif;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;color:var(--ink);border-radius:100px;padding:9px 16px;font-size:.88rem;font-weight:600;transition:all .15s}.diff-btn:hover{border-color:var(--ink)}.diff-btn.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}.stats{gap:10px;margin-bottom:20px;display:flex}.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;flex:1;padding:14px 16px}.stat-label{font-family:var(--font-ibm-plex-mono), monospace;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:4px;font-size:.7rem}.stat-value{font-family:var(--font-ibm-plex-mono), monospace;font-size:1.3rem;font-weight:600}.game-area{align-items:stretch;gap:16px;display:flex}.board-wrap{background:var(--surface);border:1px solid var(--line);border-radius:16px;flex:1;min-width:0;margin-bottom:24px;padding:16px;position:relative;box-shadow:0 20px 50px -32px #14162b66}.side-panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;gap:12px;width:140px;padding:20px 14px;display:flex;box-shadow:0 20px 50px -32px #14162b66}.start-btn{background:var(--violet);color:#fff;width:88px;height:88px;font-family:var(--font-space-grotesk), sans-serif;cursor:pointer;border:none;border-radius:50%;font-size:1rem;font-weight:700;transition:transform .15s,box-shadow .15s,opacity .3s;box-shadow:0 10px 24px -8px #5b4fff99}.start-btn:hover{transform:scale(1.05)}.start-btn:active{transform:scale(.95)}.start-btn.hidden{visibility:hidden;opacity:0}.side-hint{color:var(--ink-soft);text-align:center;font-size:.8rem;line-height:1.4}.board{aspect-ratio:1;background:var(--paper);border-radius:8px;position:relative;overflow:hidden}.piece{cursor:pointer;transform-origin:50%;background-repeat:no-repeat;transition:transform .12s,filter .12s;position:absolute}.piece.covered{cursor:default;background-image:repeating-linear-gradient(45deg, var(--violet-deep) 0 8px, var(--violet) 8px 16px)!important;background-size:auto!important}.piece.flip-pinch{transform:scaleX(.02)}.board.solved .piece{transition:left .7s cubic-bezier(.22,1,.36,1),top .7s cubic-bezier(.22,1,.36,1),width .7s cubic-bezier(.22,1,.36,1),height .7s cubic-bezier(.22,1,.36,1)}.piece.playing:hover,.piece.idle-hover:hover{transform:scale(.97)}.piece.playing:active{transform:scale(.88)}.piece.selected{filter:drop-shadow(0 0 0 3px #ff3b3b) drop-shadow(0 0 0 6px #ff3b3b59) drop-shadow(0 6px 16px #ff3b3b80);z-index:10;transform:scale(1.06)}.win-overlay{text-align:center;color:#fff;background:#14162beb;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;padding:24px;display:none;position:absolute;inset:16px}.win-overlay.show{display:flex}.win-overlay h2{margin-bottom:8px;font-size:1.6rem}.win-overlay p{color:#b8bad6;margin-bottom:20px;font-size:.95rem}.win-overlay .new-game-btn{background:var(--lime);color:var(--ink)}.score-form{gap:8px;margin-top:4px;display:flex}.score-input{font-family:var(--font-inter), sans-serif;color:#fff;background:#ffffff14;border:1.5px solid #ffffff40;border-radius:100px;outline:none;width:160px;padding:9px 14px;font-size:.9rem}.score-input::placeholder{color:#8a8db8}.score-input:focus{border-color:var(--lime)}.score-error{color:var(--magenta);margin-top:8px;font-size:.82rem}.score-submitted{color:var(--lime);margin-bottom:20px;font-size:.9rem;font-weight:600}.hint{text-align:center;color:var(--ink-soft);margin-top:16px;margin-bottom:32px;font-size:.88rem}.pulse-dot{background:var(--lime);border-radius:50%;width:6px;height:6px;animation:2s infinite puzzle-pulse;box-shadow:0 0 #c7f284b3}@keyframes puzzle-pulse{0%{box-shadow:0 0 #c7f28499}70%{box-shadow:0 0 0 6px #c7f28400}to{box-shadow:0 0 #c7f28400}}.board-section{background:var(--ink);color:#fff;border-radius:20px;padding:28px}.board-section h2{margin-bottom:4px;font-size:1.2rem}.board-section .sub{color:#8a8db8;margin-bottom:18px;font-size:.85rem}.lb-table{border-collapse:collapse;width:100%}.lb-table tr{border-bottom:1px solid #ffffff14}.lb-table tr:last-child{border-bottom:none}.lb-table td{padding:11px 6px;font-size:.9rem}.lb-rank{font-family:var(--font-ibm-plex-mono), monospace;color:var(--lime);width:30px;font-weight:600}.lb-score{font-family:var(--font-ibm-plex-mono), monospace;text-align:right}.lb-you{background:#5b4fff40;border-radius:8px}.lb-you td:first-child{border-radius:8px 0 0 8px}.lb-you td:last-child{border-radius:0 8px 8px 0}@media (max-width:640px){.game-area{flex-direction:column}.side-panel{flex-direction:row;justify-content:center;width:100%;padding:14px}}@media (max-width:520px){.controls{flex-direction:column;align-items:stretch}.diff-group{justify-content:space-between}.new-game-btn{width:100%}.stats{flex-wrap:wrap}}