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h2{margin-bottom:10px}.history__list{max-height:240px;font-family:var(--font-mono);grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:4px 10px;margin:0;padding:0;font-size:.9rem;list-style:none;display:grid;overflow-y:auto}.history__list li{background:var(--info-bg);border-radius:6px;padding:4px 8px}.shortcuts{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.input{flex-direction:column;gap:8px;margin-top:12px;display:flex}.input label{font-weight:600}.input textarea{resize:vertical;border:1px solid var(--border);background:var(--bg);width:100%;color:var(--text);font-family:var(--font-mono);border-radius:12px;padding:12px;font-size:.9rem}.input textarea[aria-invalid=true]{border-color:var(--danger)}.input__actions{gap:8px;display:flex}.library{grid-template-columns:minmax(0,1fr) minmax(0,430px);align-items:start;gap:24px;display:grid}.library__list{flex-direction:column;gap:16px;display:flex}.library__preview{position:sticky;top:16px}.library__footer{border:1px solid 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button{min-width:46px;font-family:var(--font-mono);border-radius:999px;justify-content:center}.preview__counter{text-align:center;font-variant-numeric:tabular-nums;min-width:70px;font-weight:650}.preview__moves{background:var(--info-bg);max-height:170px;font-family:var(--font-mono);border-radius:12px;flex-wrap:wrap;gap:2px 10px;margin:0;padding:10px;font-size:.9rem;list-style:none;display:flex;overflow-y:auto}.preview__moves li{align-items:center;gap:2px;display:flex}.move{min-height:0;box-shadow:none;font:inherit;background:0 0;border:none;border-radius:6px;padding:2px 6px}.move:hover:not(:disabled){background:var(--surface);box-shadow:none;transform:none}.move--active,.move--active:hover:not(:disabled){background:var(--walnut);color:#fff8ea}.preview__actions{flex-wrap:wrap;gap:8px;display:flex}.set{flex-direction:column;gap:12px;display:flex}.set__header{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.set__games{flex-direction:column;gap:4px;max-height:230px;margin:0;padding:0;list-style:none;display:flex;overflow-y:auto}.set__game{border-radius:10px;align-items:center;gap:10px;padding:6px 8px;display:flex}.set__game--current{background:var(--hint-bg);font-weight:650}.set__game--pending{color:var(--muted)}.set__marker{border:2px solid var(--border);border-radius:50%;flex-shrink:0;place-items:center;width:26px;height:26px;font-size:.78rem;font-weight:700;display:inline-grid}.set__game--done .set__marker{background:var(--success);border-color:var(--success);color:#fff}.set__game--current .set__marker{border-color:var(--gold);color:var(--walnut);background:linear-gradient(180deg, #fff8e0, var(--gold-light));box-shadow:0 0 0 4px color-mix(in srgb, var(--gold) 20%, transparent)}.set__title{flex:1;min-width:0}.set__passed{background:radial-gradient(300px 80px at 0% 0%, #f3cf5c59, transparent 70%), var(--success-bg);color:var(--success);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 12px;padding:14px;animation:.26s ease-out pop;display:flex}.promotion{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:10;background:#140a0480;place-items:center;display:grid;position:absolute;inset:0}.promotion__choices{background:var(--surface);border-radius:var(--radius);text-align:center;box-shadow:var(--shadow-md);font-family:var(--font-display);flex-direction:column;align-items:center;gap:8px;padding:14px 18px;font-weight:700;display:flex}.promotion__row{gap:8px;display:flex}.promotion__row button{justify-content:center;width:66px;height:66px;padding:6px}.promotion__row button svg{width:100%;height:100%}.celebration{z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#140a0499;place-items:center;padding:16px;animation:.25s ease-out fade-in;display:grid;position:fixed;inset:0;overflow:hidden}.celebration__card{text-align:center;background:radial-gradient(120% 60% at 50% 0%, #f5b70038, transparent 70%), var(--surface);border:1px solid color-mix(in srgb, var(--gold) 40%, var(--border));border-radius:22px;width:min(460px,100%);max-height:calc(100vh - 32px);padding:30px 24px 22px;animation:.5s cubic-bezier(.2,1.4,.4,1) both card-in;position:relative;overflow-y:auto;box-shadow:0 24px 60px #0006}.trophy{filter:drop-shadow(0 6px 14px #c98a0073);width:92px;height:92px;animation:.7s cubic-bezier(.2,1.6,.4,1) .12s both 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0;font-size:1.5rem;font-weight:800}.celebration__actions{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.confetti{pointer-events:none;position:absolute;inset:0}.confetti span{animation-name:confetti-fall;animation-timing-function:cubic-bezier(.25,.4,.55,1);animation-fill-mode:both;position:absolute;top:-20px}@keyframes confetti-fall{0%{opacity:1;transform:translateY(-5vh)rotate(0)}85%{opacity:1}to{transform:translate3d(var(--drift), 105vh, 0) rotate(var(--spin));opacity:0}}@keyframes fade-in{0%{opacity:0}}@keyframes card-in{0%{opacity:0;transform:translateY(24px)scale(.92)}}@keyframes trophy-in{0%{opacity:0;transform:scale(.3)rotate(-18deg)}}@keyframes star-in{0%{opacity:0;transform:scale(.2)rotate(-40deg)}}@media (width<=420px){.celebration__stats{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=600px){.app__header{padding:14px}.brand__logo{width:48px;height:48px}.brand__tagline{font-size:.95rem}.brand__description{display:none}.tabs{width:100%}.tabs button{flex:1;justify-content:center;gap:4px;padding:8px 6px;font-size:.85rem}}@media (hover:none){kbd,.shortcuts{display:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}.confetti{display:none}}.puzzles{flex-direction:column;gap:16px;display:flex}.puzzles__intro h2,.puzzles__option h3{align-items:center;gap:8px;display:flex}.puzzles__intro p{margin-top:6px}.puzzles__categories{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;display:grid}.puzzle-tile{border-radius:var(--radius);background:var(--surface);text-align:left;flex-direction:column;align-items:flex-start;gap:4px;min-height:120px;padding:14px}.puzzle-tile__icon{margin-bottom:4px;font-size:1.8rem;line-height:1}.puzzle-tile__title{font-family:var(--font-display);font-size:1.1rem;font-weight:700}.puzzle-tile__description{color:var(--muted);font-size:.82rem;font-weight:450}.puzzle-tile--active,.puzzle-tile--active:hover:not(:disabled){border-color:var(--gold);background:color-mix(in srgb, var(--gold) 18%, var(--surface));box-shadow:0 0 0 3px color-mix(in srgb, var(--gold) 35%, transparent), var(--shadow-sm)}.puzzles__options{flex-direction:column;gap:16px;display:flex}.puzzles__option h3{font-family:var(--font-display);margin:0 0 8px;font-size:1rem}.chips{flex-wrap:wrap;gap:8px;display:flex}.chip{border-radius:999px;min-height:38px;padding:7px 14px}.chip__meta{color:var(--muted);font-variant-numeric:tabular-nums;font-size:.75rem}.chip[aria-pressed=true],.chip[aria-pressed=true]:hover:not(:disabled){color:var(--accent-text);background:linear-gradient(180deg, #8a5428, var(--walnut) 55%, var(--walnut-dark));border-color:#0000}.chip[aria-pressed=true] .chip__meta{color:inherit;opacity:.8}.puzzles__start{border-top:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding-top:12px;display:flex}.puzzles__start .primary{border-radius:999px;padding-inline:22px}.puzzles__credit a{color:inherit}@media (prefers-color-scheme:dark){.chip[aria-pressed=true]{background:linear-gradient(180deg, var(--gold-light), var(--gold) 60%, #a97d0c)}}.wrong-move{z-index:20;-webkit-backdrop-filter:blur(1.5px);backdrop-filter:blur(1.5px);background:radial-gradient(circle,#78140e59,#1408048c);place-items:center;padding:12px;animation:.15s ease-out fade-in;display:grid;position:absolute;inset:0}.wrong-move__card{border-radius:var(--radius);text-align:center;background:var(--surface);border-top:5px solid var(--danger);width:min(320px,100%);padding:20px 18px 16px;animation:.26s cubic-bezier(.2,1.4,.4,1) both card-in,.36s ease-out .26s shake;box-shadow:0 18px 40px #00000073}.wrong-move__icon{color:#fff;background:var(--danger);width:48px;height:48px;box-shadow:0 0 0 6px color-mix(in srgb, var(--danger) 20%, transparent);border-radius:50%;place-items:center;margin-bottom:6px;font-size:1.5rem;font-weight:800;display:inline-grid}.wrong-move h2{color:var(--danger);font-size:1.5rem}.wrong-move__text{color:var(--muted);margin:6px 0 14px}.wrong-move__text strong{font-family:var(--font-mono);color:var(--text)}.wrong-move__actions{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.wrong-move__actions button{flex:120px;justify-content:center}