:root{--bg: #f5f5f7;--surface: #ffffff;--fill: #f5f5f7;--fill-hover: #e8e8ed;--text: #1d1d1f;--muted: #6e6e73;--border: #d2d2d7;--glass: rgba(245, 245, 247, .72);--shadow: 0 4px 24px rgba(0, 0, 0, .06);--shadow-hover: 0 8px 32px rgba(0, 0, 0, .1);--accent: #e8590c;--accent-hover: #d14f0a;--accent-text: #ffffff;--danger: #e30000;--range: rgba(232, 89, 12, .16);--range-active: rgba(232, 89, 12, .36);--radius: 18px;--radius-sm: 12px;--pill: 980px;--ease: cubic-bezier(.25, .1, .25, 1);--header-h: 52px;--player-bg: #000000;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #000000;--surface: #1c1c1e;--fill: #2c2c2e;--fill-hover: #3a3a3c;--text: #f5f5f7;--muted: #a1a1a6;--border: #38383a;--glass: rgba(22, 22, 23, .72);--shadow: none;--shadow-hover: 0 8px 32px rgba(0, 0, 0, .5);--accent: #ff7a2f;--accent-hover: #ff8f50;--accent-text: #141414;--danger: #ff453a;--range: rgba(255, 122, 47, .2);--range-active: rgba(255, 122, 47, .45);--player-bg: #1c1c1e}}*{box-sizing:border-box}body{margin:0;overflow-x:clip;background:var(--bg);color:var(--text);font:16px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans Thai,Helvetica Neue,system-ui,sans-serif;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}button,input{font:inherit;color:inherit}button{cursor:pointer;transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}button:active:not(:disabled){transform:scale(.97)}button:disabled{opacity:.35;cursor:default}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app{max-width:1200px;margin:0 auto;padding:0 16px calc(32px + env(safe-area-inset-bottom))}.header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:12px;height:var(--header-h);margin:0 calc(50% - 50vw);padding:0 calc(50vw - 50%);background:var(--glass);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid color-mix(in srgb,var(--border) 60%,transparent)}.logo{margin:0;font-size:1.3rem;font-weight:600;letter-spacing:-.02em;color:var(--text)}.btn-lang{padding:4px 12px;border:0;border-radius:var(--pill);background:transparent;color:var(--muted);font-size:.8rem}.btn-lang:hover{color:var(--text);background:var(--fill-hover)}.hero{text-align:center;padding:56px 0 28px}.hero-title{margin:0 auto;max-width:14em;font-size:clamp(2.25rem,7vw,4.5rem);font-weight:700;line-height:1.15;letter-spacing:-.015em}.hero-sub{margin:16px auto 0;max-width:32em;color:var(--muted);font-size:clamp(1.05rem,2.4vw,1.3rem);line-height:1.45}.video-form{display:flex;gap:8px;margin:20px 0 4px}.video-form.is-hero{max-width:640px;margin:0 auto}.video-form input{flex:1;min-width:0;padding:12px 20px;border:1px solid transparent;border-radius:var(--pill);background:var(--surface);box-shadow:var(--shadow);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.video-form input::placeholder{color:var(--muted)}.video-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--range)}.empty{text-align:center;padding:48px 0 8px}.samples-title{font-size:1.5rem;font-weight:600;letter-spacing:-.01em;margin:0 0 20px}.samples{list-style:none;margin:0 auto;padding:0;display:grid;gap:16px;max-width:640px}.sample{display:flex;align-items:center;gap:16px;width:100%;padding:12px;text-align:left;border:0;border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.sample:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.sample img{width:136px;height:auto;aspect-ratio:16 / 9;object-fit:cover;border-radius:var(--radius-sm);flex:none}.sample strong{font-weight:600}.sample small{display:block;color:var(--muted);font-size:.85rem;margin-top:4px}.error{color:var(--danger);margin:8px 0;text-align:center}.error a{color:inherit}.hint{color:var(--muted);font-size:.85rem;margin:8px 0}.status{color:var(--accent);font-weight:600;text-align:center;margin:4px 0 0;min-height:1.5em}.layout{display:grid;gap:20px;margin-top:20px}.col-controls{display:grid;gap:16px;align-content:start}.player-frame{position:relative;aspect-ratio:16 / 9;background:var(--player-bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.player-host,.player-host iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.timeline{margin-top:16px;-webkit-user-select:none;user-select:none}.timeline-bar{position:relative;height:44px;background:var(--surface);border-radius:var(--radius-sm);box-shadow:var(--shadow);touch-action:none;cursor:pointer}.timeline-range{position:absolute;top:0;bottom:0;background:var(--range)}.timeline-range.is-active{background:var(--range-active)}.timeline-handle{position:absolute;top:-4px;bottom:-4px;left:-11px;width:22px;cursor:ew-resize}.timeline-handle:after{content:"";position:absolute;left:9px;top:0;bottom:0;width:4px;border-radius:2px;background:var(--accent)}.timeline-handle.is-end{left:auto;right:-11px}.timeline-playhead{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:var(--text);pointer-events:none}.timeline-times{display:flex;justify-content:space-between;margin-top:6px;color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums}.transport{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:12px}.btn-play,.btn-round{display:inline-grid;place-items:center;border-radius:var(--pill);border:0;background:var(--fill)}.transport .btn-round{background:var(--surface);box-shadow:var(--shadow)}.btn-round:hover:not(:disabled){background:var(--fill-hover)}.btn-round{width:52px;height:52px;font-size:1.1rem}.btn-play{width:72px;height:72px;font-size:1.6rem;background:var(--accent);color:var(--accent-text)}.btn-play:hover{background:var(--accent-hover)}.btn-ab{font-weight:600}.btn-primary,.btn-secondary,.btn-set{padding:12px 22px;border-radius:var(--pill);border:0;font-weight:500;white-space:nowrap}.btn-primary{background:var(--accent);color:var(--accent-text)}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--surface);box-shadow:var(--shadow)}.btn-set{background:var(--fill);padding:8px 14px}.btn-secondary:hover,.btn-set:hover{background:var(--fill-hover)}.btn-small{min-width:44px;min-height:40px;padding:4px 8px;border-radius:10px;border:0;background:var(--fill);font-variant-numeric:tabular-nums}.btn-small:hover{background:var(--fill-hover)}.btn-text{background:none;border:0;padding:8px;color:var(--muted);font-size:.9rem}.btn-text:hover{color:var(--text);text-decoration:underline}.danger,.btn-text.danger:hover{color:var(--danger)}.hint.ok{color:var(--accent)}.panel{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.panel h2{margin:0 0 12px;font-size:1.1rem;font-weight:600;letter-spacing:-.01em;display:flex;justify-content:space-between;align-items:center;gap:8px}.value{font-size:1.25rem;font-weight:600;font-variant-numeric:tabular-nums}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{display:inline-flex;flex-direction:column;justify-content:center;align-items:center;min-height:40px;padding:6px 16px;border-radius:var(--pill);border:1px solid transparent;background:var(--fill);font-size:.9rem;line-height:1.2}.chip:hover:not(:disabled){background:var(--fill-hover)}.chip small{color:var(--muted);font-size:.72rem;font-variant-numeric:tabular-nums}.chip.is-on,.chip.is-on:hover{background:var(--text);color:var(--bg)}.chip.is-on small{color:inherit;opacity:.7}.chip.is-ghost{border:1px dashed var(--border);background:transparent;color:var(--muted)}.chip.is-ghost:hover:not(:disabled){color:var(--text);border-color:var(--muted);background:transparent}.section-editor{display:grid;gap:10px;margin-top:16px;padding-top:16px;border-top:1px solid color-mix(in srgb,var(--border) 60%,transparent)}.section-name{padding:10px 14px;border:1px solid transparent;border-radius:var(--radius-sm);background:var(--fill)}.section-name:focus,.bpm-row input:focus{outline:none;border-color:var(--accent)}.edge-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.edge-label{font-weight:600;width:1.2em}.edge-time{min-width:4.5em;text-align:center;font-variant-numeric:tabular-nums;font-weight:600}.edge-row .btn-set{margin-left:auto}.trainer-row{display:flex;align-items:center;gap:6px;margin-top:8px}.trainer-row>span{width:5.5em;font-size:.85rem;color:var(--muted)}.stepper{display:flex;align-items:center;gap:12px}.stepper input[type=range]{flex:1;accent-color:var(--accent);min-height:44px}.stepper+.chips{margin-top:12px}.field{display:grid;gap:8px;margin-top:12px}.field>span,.field>label{font-size:.85rem;color:var(--muted)}.bpm-row{display:flex;gap:8px}.bpm-row input{width:6em;padding:8px 12px;border:1px solid transparent;border-radius:var(--radius-sm);background:var(--fill)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.shortcuts{display:none}.library{list-style:none;margin:0;padding:0;display:grid;gap:10px}.library li{display:flex;align-items:center;gap:12px}.library img{border-radius:8px;object-fit:cover;flex:none}.library-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app>.panel{margin-top:32px}.footer{display:flex;justify-content:center;gap:24px;margin-top:48px;padding-top:16px;border-top:1px solid color-mix(in srgb,var(--border) 60%,transparent);font-size:.8rem}.footer a{color:var(--muted);text-decoration:none}.footer a:hover{color:var(--text);text-decoration:underline}.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translate(-50%);background:color-mix(in srgb,var(--text) 88%,transparent);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:var(--bg);padding:10px 20px;border-radius:var(--pill);font-weight:500;box-shadow:var(--shadow-hover);animation:toast-in .3s var(--ease)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,8px)}}@media (min-width: 900px){.hero{padding:96px 0 40px}.layout{grid-template-columns:minmax(0,3fr) minmax(320px,2fr);gap:24px;margin-top:24px}.col-player{position:sticky;top:calc(var(--header-h) + 24px)}.shortcuts{display:block}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{transition:none!important;animation:none!important}button:active:not(:disabled),.sample:hover{transform:none}}