:root{--radius-sm: 8px;--radius-md: 14px;--radius-lg: 22px;--radius-pill: 999px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 28px;--transition-fast: .16s ease;--transition: .22s ease;--font-sans: "Inter", "Noto Sans TC", "Segoe UI", system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace}:root,:root[data-theme=cyberpunk]{--bg: #06080d;--bg-grad-1: rgba(0, 255, 204, .12);--bg-grad-2: rgba(255, 107, 157, .12);--bg-grad-3: rgba(255, 217, 61, .06);--text: #e8ecf2;--text-dim: #7a8294;--text-soft: rgba(232, 236, 242, .74);--accent: #00ffcc;--accent-2: #ff6b9d;--accent-3: #ffd93d;--accent-soft: rgba(0, 255, 204, .18);--glass: rgba(255, 255, 255, .05);--glass-strong: rgba(255, 255, 255, .1);--glass-border: rgba(255, 255, 255, .08);--panel-bg: linear-gradient(145deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .03)), radial-gradient(circle at top left, rgba(0, 255, 204, .16), transparent 45%);--panel-border: rgba(255, 255, 255, .1);--panel-shadow: 0 18px 48px rgba(0, 0, 0, .42);--kbd-bg: rgba(255, 255, 255, .08);--kbd-border: rgba(255, 255, 255, .14);--grid-line: rgba(255, 255, 255, .025);--ambient-opacity: .8;--grid-opacity: .22}:root[data-theme=study]{--bg: #eef1f5;--bg-grad-1: rgba(31, 102, 245, .05);--bg-grad-2: rgba(245, 158, 11, .04);--bg-grad-3: rgba(99, 102, 241, .03);--text: #14181f;--text-dim: #5d6571;--text-soft: rgba(20, 24, 31, .74);--accent: #1f66f5;--accent-2: #c4356c;--accent-3: #c2701a;--accent-soft: rgba(31, 102, 245, .12);--glass: rgba(255, 255, 255, .7);--glass-strong: rgba(255, 255, 255, .85);--glass-border: rgba(20, 24, 31, .1);--panel-bg: linear-gradient(180deg, rgba(255, 255, 255, .96), rgba(255, 255, 255, .82));--panel-border: rgba(20, 24, 31, .1);--panel-shadow: 0 20px 60px rgba(40, 50, 80, .14);--kbd-bg: rgba(20, 24, 31, .06);--kbd-border: rgba(20, 24, 31, .18);--grid-line: rgba(20, 24, 31, .04);--ambient-opacity: .45;--grid-opacity: .5}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;width:100%;overflow:hidden}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;position:relative}body:before,body:after{content:"";position:fixed;inset:-10%;pointer-events:none;z-index:0}body:before{background:radial-gradient(circle at 20% 18%,var(--bg-grad-1),transparent 28%),radial-gradient(circle at 80% 14%,var(--bg-grad-2),transparent 30%),conic-gradient(from 45deg,var(--bg-grad-1),transparent 34%,var(--bg-grad-3),transparent 66%,var(--bg-grad-2),transparent 100%);filter:blur(80px);opacity:var(--ambient-opacity);animation:ambient-drift 28s linear infinite}body:after{background:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:120px 120px;mask-image:radial-gradient(circle at center,rgba(0,0,0,.55),transparent 78%);opacity:var(--grid-opacity)}@keyframes ambient-drift{0%{transform:rotate(0) scale(1)}50%{transform:rotate(180deg) scale(1.06)}to{transform:rotate(360deg) scale(1)}}#app{position:relative;width:100%;height:100%;isolation:isolate}#cube-container{position:absolute;inset:0;z-index:1}#cube-container canvas{display:block;width:100%!important;height:100%!important}#hud{position:absolute;inset:0;z-index:10;pointer-events:none;display:grid;grid-template-rows:auto 1fr auto;padding:clamp(14px,2.6vw,28px);gap:var(--space-4)}#hud>*{pointer-events:none}#hud-controls,.mode-switcher,.theme-switcher,.guide-panel,.result-panel,.victory-burst{pointer-events:auto}#hud.is-result-mode>:not(.result-panel):not(.victory-burst){opacity:.32;filter:saturate(.7);transition:opacity var(--transition),filter var(--transition)}.topbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:var(--space-4)}.topbar__brand{display:flex;align-items:center;gap:var(--space-3)}.brand-mark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 0 24px var(--accent-soft)}.brand-name{font-size:.95rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--text)}.topbar__center{display:flex;flex-direction:column;align-items:center;gap:var(--space-1)}.status-eyebrow{font-size:.66rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim)}#status-text{font-size:clamp(.95rem,2.2vw,1.25rem);font-weight:600;color:var(--accent);text-shadow:0 0 18px var(--accent-soft)}.topbar__right{display:flex;justify-content:flex-end;align-items:center;gap:var(--space-2)}.mode-switcher,.theme-switcher{display:inline-flex;background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-pill);padding:3px;backdrop-filter:blur(10px)}.mode-switcher__btn,.theme-switcher__btn{appearance:none;border:none;background:transparent;color:var(--text-dim);padding:6px 14px;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;font-weight:600;border-radius:var(--radius-pill);cursor:pointer;transition:color var(--transition-fast),background var(--transition-fast);font-family:inherit}.mode-switcher__btn:hover,.theme-switcher__btn:hover{color:var(--text)}.mode-switcher__btn.is-active,.theme-switcher__btn.is-active{background:var(--accent);color:#06080d;box-shadow:0 0 18px var(--accent-soft)}:root[data-theme=study] .mode-switcher__btn.is-active,:root[data-theme=study] .theme-switcher__btn.is-active{color:#fff;box-shadow:0 4px 14px #1f66f54d}.center-stage{display:flex;flex-direction:column;justify-content:space-between;align-items:stretch;pointer-events:none;gap:var(--space-4)}.center-stage>*{pointer-events:none}#hud-stats{display:flex;justify-content:center;gap:clamp(20px,4vw,56px);pointer-events:none}.stat{display:flex;flex-direction:column;align-items:center;gap:2px}.stat-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.18em;color:var(--text-dim)}.stat-value{font-size:clamp(1.4rem,3.6vw,2.2rem);font-weight:800;font-variant-numeric:tabular-nums;color:var(--text);font-family:var(--font-mono)}.bottombar{display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}#hud-controls{display:flex;justify-content:center;gap:var(--space-3);flex-wrap:wrap}.btn-neon{background:var(--glass);color:var(--accent);border:1px solid var(--accent);padding:10px 26px;font-size:.85rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast);backdrop-filter:blur(8px);font-family:inherit}.btn-neon:hover{background:var(--accent-soft);box-shadow:0 0 18px var(--accent-soft);transform:translateY(-1px)}.btn-neon:active{transform:translateY(0)}.btn-secondary{color:var(--text-dim);border-color:var(--glass-border)}.btn-secondary:hover{color:var(--text);background:var(--glass-strong);box-shadow:none}.btn-guide.is-active{background:var(--accent-soft);box-shadow:0 0 22px var(--accent-soft)}#hud-keys{display:flex;flex-direction:column;align-items:center;gap:4px;pointer-events:none}.key-group{display:flex;align-items:center;gap:8px;font-size:.7rem;color:var(--text-dim)}.key-title{color:var(--accent);font-weight:600;min-width:52px;text-align:right;font-size:.62rem;text-transform:uppercase;letter-spacing:.12em}kbd{display:inline-block;background:var(--kbd-bg);border:1px solid var(--kbd-border);border-radius:4px;padding:1px 5px;font-family:var(--font-mono);font-size:.66rem;color:var(--text);margin:0 1px}.guide-panel{position:absolute;top:clamp(80px,14vh,140px);right:clamp(16px,3vw,28px);width:min(380px,calc(100vw - 32px));padding:var(--space-5);border-radius:var(--radius-lg);border:1px solid var(--panel-border);background:var(--panel-bg);backdrop-filter:blur(18px);box-shadow:var(--panel-shadow);opacity:0;pointer-events:none;transform:translate3d(18px,0,0);transition:opacity .18s ease,transform .22s ease;display:grid;gap:var(--space-4)}.guide-panel.is-open{opacity:1;pointer-events:auto;transform:translateZ(0)}.guide-panel.is-pulse{animation:guide-pulse .48s ease}@keyframes guide-pulse{0%{box-shadow:var(--panel-shadow)}50%{box-shadow:0 0 0 1px var(--accent),0 24px 60px #00000080,0 0 36px var(--accent-soft)}to{box-shadow:var(--panel-shadow)}}.guide-panel__head{display:grid;grid-template-columns:1fr auto;gap:var(--space-3);align-items:start}.guide-panel__copy{display:grid;gap:4px}.guide-panel__eyebrow{font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}.guide-panel__title{font-size:1.2rem;font-weight:700;letter-spacing:.02em;color:var(--text)}.btn-guide-step{padding:8px 16px;font-size:.78rem;white-space:nowrap}.guide-panel__stages{display:grid;gap:6px}.stage-row{display:grid;grid-template-columns:22px 1fr auto;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;font-size:.84rem;background:var(--glass);border:1px solid transparent;color:var(--text-dim);transition:background var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast)}.stage-row.is-current{background:var(--accent-soft);color:var(--text);border-color:var(--accent)}.stage-row.is-done{color:var(--text-soft)}.stage-row.is-blocked{color:var(--text-dim);background:transparent;border-color:var(--glass-border);border-style:dashed;opacity:.7}.stage-row.is-blocked .stage-row__index{background:transparent;border:1px dashed var(--glass-border)}.stage-row__index{width:22px;height:22px;border-radius:50%;background:var(--glass-strong);display:grid;place-items:center;font-size:.7rem;font-weight:700;font-family:var(--font-mono);color:var(--text)}.stage-row.is-current .stage-row__index{background:var(--accent);color:#06080d}.stage-row.is-done .stage-row__index{background:transparent;color:var(--accent);border:1px solid var(--accent)}:root[data-theme=study] .stage-row.is-current .stage-row__index{color:#fff}.stage-row__name{font-weight:600}.stage-row__count{font-family:var(--font-mono);font-size:.74rem;color:var(--text-dim)}.guide-panel__next{display:grid;gap:var(--space-2);padding:var(--space-4);border-radius:var(--radius-md);background:var(--glass);border:1px solid var(--glass-border)}.guide-panel__next-label{font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}.guide-panel__move{font-family:var(--font-mono);font-size:clamp(2.1rem,6vw,2.8rem);font-weight:800;letter-spacing:.06em;color:var(--accent-3);text-shadow:0 0 24px rgba(255,217,61,.24);line-height:1}:root[data-theme=study] .guide-panel__move{color:var(--accent-3);text-shadow:none}.guide-panel__move-label{font-size:.86rem;color:var(--text);font-weight:600}.guide-panel__remaining{font-size:.74rem;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;font-weight:600}.guide-panel__selfdone{margin-top:2px;font-size:.78rem;font-weight:700;color:var(--accent);letter-spacing:.02em}.guide-panel__howto{display:grid;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-left:2px solid var(--accent-3);background:var(--glass);border-radius:0 var(--radius-md) var(--radius-md) 0}.guide-panel__howto-label{font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-3);font-weight:700}.howto-list{display:grid;grid-template-columns:auto 1fr;gap:5px var(--space-3);align-items:baseline;margin:0}.howto-list dt{font-size:.68rem;letter-spacing:.1em;color:var(--text-dim);white-space:nowrap}.howto-list dd{margin:0;font-size:.84rem;line-height:1.55;color:var(--text-soft)}.howto-list dd b{font-family:var(--font-mono);color:var(--text);font-weight:700}.howto-list dd i{font-style:normal;font-size:.74rem;color:var(--text-dim)}.howto-hint{font-size:.74rem;line-height:1.5;color:var(--text-dim)}.btn-guide-step.is-confirm{border-color:var(--accent-3);color:var(--accent-3)}.guide-panel__why{display:grid;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-left:2px solid var(--accent);background:var(--glass);border-radius:0 var(--radius-md) var(--radius-md) 0}.guide-panel__why-head{display:flex;justify-content:space-between;align-items:center;gap:var(--space-2)}.guide-panel__why-label{font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}.depth-toggle{appearance:none;background:transparent;border:1px solid var(--glass-border);color:var(--text-dim);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:var(--radius-pill);cursor:pointer;font-family:inherit;transition:all var(--transition-fast)}.depth-toggle:hover{color:var(--text);border-color:var(--accent)}.depth-toggle.is-deep{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}.guide-panel__why-text{font-size:.86rem;line-height:1.65;color:var(--text-soft)}.guide-panel__queue{display:grid;gap:var(--space-2)}.guide-panel__queue-label{font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}.guide-panel__queue-list{display:flex;flex-wrap:wrap;gap:6px}.guide-panel__queue-chip{display:inline-flex;align-items:center;justify-content:center;min-width:38px;padding:5px 9px;border-radius:var(--radius-pill);background:var(--glass-strong);border:1px solid var(--glass-border);font-size:.78rem;font-weight:700;letter-spacing:.06em;font-family:var(--font-mono);color:var(--text)}.guide-panel__queue-chip.is-next{background:var(--accent);color:#06080d;border-color:var(--accent)}:root[data-theme=study] .guide-panel__queue-chip.is-next{color:#fff}.result-panel{position:absolute;left:50%;bottom:clamp(88px,12vh,128px);width:min(560px,calc(100vw - 32px));padding:var(--space-5);border-radius:var(--radius-lg);border:1px solid var(--panel-border);background:var(--panel-bg);backdrop-filter:blur(18px);box-shadow:var(--panel-shadow);opacity:0;pointer-events:none;transform:translate(-50%,24px) scale(.96);transition:opacity .22s ease,transform .26s ease;overflow:hidden}.result-panel.is-open{opacity:1;pointer-events:auto;transform:translate(-50%) scale(1)}.result-panel__glow{position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 50% 0%,rgba(255,255,255,.16),transparent 34%),linear-gradient(120deg,var(--accent-soft),transparent 32%,rgba(255,107,157,.08) 72%,transparent 100%);opacity:.85}.result-panel__header,.result-panel__stats,.result-panel__footer{position:relative;z-index:1}.result-panel__header{display:grid;gap:var(--space-3)}.result-panel__eyebrow{font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim)}.result-panel__hero{display:grid;grid-template-columns:auto 1fr;gap:var(--space-4);align-items:center}.result-panel__rank{font-size:clamp(3.4rem,9vw,5rem);font-weight:900;line-height:.92;letter-spacing:-.05em;background:linear-gradient(180deg,#fff5bd,#ffd93d 45%,#ff8f3d);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 36px rgba(255,217,61,.18);font-family:var(--font-mono)}.result-panel[data-rank=s] .result-panel__rank{background:linear-gradient(180deg,#fff,#9effee 45%,#0fc);-webkit-background-clip:text;background-clip:text}.result-panel[data-rank=d] .result-panel__rank,.result-panel[data-rank=c] .result-panel__rank{background:linear-gradient(180deg,#ffe6d8,#ffb05b 55%,#ff6b9d);-webkit-background-clip:text;background-clip:text}.result-panel__copy{display:grid;gap:6px}.result-panel__title{font-size:clamp(1.3rem,4vw,1.85rem);font-weight:800}.result-panel__summary{font-size:.92rem;line-height:1.65;color:var(--text-soft)}.result-panel__stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3);margin-top:var(--space-4)}.result-panel__stat{display:grid;gap:6px;padding:var(--space-3);border-radius:var(--radius-md);background:var(--glass);border:1px solid var(--glass-border)}.result-panel__stat-label{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim)}.result-panel__stat-value{font-size:clamp(1.05rem,2.8vw,1.45rem);font-weight:800;color:var(--text);font-family:var(--font-mono)}.result-panel__footer{display:grid;gap:var(--space-4);margin-top:var(--space-4)}.result-panel__tags{display:flex;gap:var(--space-2);flex-wrap:wrap}.result-panel__tag{display:inline-flex;align-items:center;min-height:32px;padding:0 12px;border-radius:var(--radius-pill);background:var(--glass-strong);border:1px solid var(--glass-border);font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text)}.result-panel__tag--score{color:var(--accent-3)}.result-panel__actions{display:flex;gap:var(--space-3);flex-wrap:wrap}.result-panel__actions .btn-neon{flex:1 1 180px}.victory-burst{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;opacity:0;z-index:9}.victory-burst.is-live{animation:victory-burst-fade 1.08s ease}.victory-burst__ring{position:absolute;border-radius:var(--radius-pill);border:1px solid rgba(255,255,255,.24);background:radial-gradient(circle,rgba(255,217,61,.18),transparent 58%),radial-gradient(circle,var(--accent-soft),transparent 72%);box-shadow:0 0 28px #ffd93d2e,0 0 48px var(--accent-soft)}.victory-burst__ring--inner{width:min(40vw,320px);height:min(40vw,320px)}.victory-burst__ring--outer{width:min(64vw,540px);height:min(64vw,540px);border-color:#ff6b9d2e}.victory-burst.is-live .victory-burst__ring--inner{animation:victory-ring-inner 1.08s cubic-bezier(.16,.84,.32,1)}.victory-burst.is-live .victory-burst__ring--outer{animation:victory-ring-outer 1.08s cubic-bezier(.16,.84,.32,1)}@keyframes victory-burst-fade{0%{opacity:0}12%{opacity:1}to{opacity:0}}@keyframes victory-ring-inner{0%{transform:scale(.45);opacity:0}20%{opacity:1}to{transform:scale(1.4);opacity:0}}@keyframes victory-ring-outer{0%{transform:scale(.72);opacity:0}26%{opacity:.66}to{transform:scale(1.18);opacity:0}}@media(max-width:720px){#hud{padding-bottom:100px;gap:var(--space-3)}#hud-keys{display:none}.topbar{grid-template-columns:1fr;gap:var(--space-2);justify-items:center}.topbar__brand,.topbar__right{justify-self:center}.btn-neon{padding:11px 22px;font-size:.82rem}.guide-panel{top:auto;right:12px;bottom:92px;width:calc(100vw - 24px);padding:var(--space-4)}.result-panel{bottom:22px;padding:var(--space-4)}.result-panel__hero,.result-panel__stats{grid-template-columns:1fr}.result-panel__actions .btn-neon{width:100%}.mode-switcher__btn,.theme-switcher__btn{padding:6px 11px;font-size:.66rem}}