:root{--bg: #0b0e13;--panel: #141922;--panel-2: #1b2230;--line: #2a3444;--text: #e6ebf2;--muted: #8d9aad;--accent: #5b9cff;--danger: #ff6b6b;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.5 system-ui,-apple-system,Segoe UI,Noto Sans KR,sans-serif}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line);background:var(--panel)}.brand h1{margin:0;font-size:16px;letter-spacing:.01em}.brand p{margin:2px 0 0;color:var(--muted);font-size:12px}.tabs{display:flex;gap:4px;padding:3px;border-radius:10px;background:var(--bg)}.tabs button{padding:7px 16px;border:0;border-radius:7px;background:transparent;color:var(--muted);font:inherit;font-weight:600;cursor:pointer}.tabs button.is-active{background:var(--panel-2);color:var(--text)}.tabs button:disabled{opacity:.4;cursor:not-allowed}.layout{display:grid;grid-template-columns:1fr 340px;flex:1;min-height:0}.stage{display:flex;flex-direction:column;min-width:0;min-height:0}.viewer,.stage-empty{flex:1;min-height:0}.viewer canvas{display:block;width:100%;height:100%}.stage-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px}.disclaimer{margin:0;padding:8px 16px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.panel{display:flex;flex-direction:column;gap:16px;padding:16px;overflow-y:auto;border-left:1px solid var(--line);background:var(--panel)}.panel-section{display:flex;flex-direction:column;gap:12px;padding:14px;border:1px solid var(--line);border-radius:10px;background:var(--panel-2)}.panel-section h2{margin:0;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.dropzone{display:flex;flex-direction:column;align-items:center;gap:6px;padding:22px 18px;border:1.5px dashed var(--line);border-radius:10px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.is-over{border-color:var(--accent);background:#5b9cff14}.dropzone.is-disabled{opacity:.5;cursor:progress}.dropzone span{color:var(--muted);font-size:12px}.stage-empty .dropzone{width:min(460px,100%);padding:44px 24px}.slider{display:flex;flex-direction:column;gap:5px}.slider-head{display:flex;justify-content:space-between;font-size:13px}.slider-head output{color:var(--accent);font-variant-numeric:tabular-nums}.slider small{color:var(--muted);font-size:11px}input[type=range]{width:100%;accent-color:var(--accent)}.check{display:flex;align-items:center;gap:8px;font-size:13px}.row{display:flex;gap:8px}button{padding:9px 14px;border:1px solid transparent;border-radius:8px;background:var(--accent);color:#08111f;font:inherit;font-weight:600;cursor:pointer}button.ghost{border-color:var(--line);background:transparent;color:var(--text);font-weight:500}button:disabled{opacity:.45;cursor:not-allowed}.progress{display:flex;flex-direction:column;gap:6px;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--panel-2)}.progress.is-error{border-color:var(--danger);color:var(--danger)}.progress-text{display:flex;justify-content:space-between;gap:8px;font-size:12px}.progress-track{height:5px;overflow:hidden;border-radius:3px;background:var(--bg)}.progress-fill{height:100%;background:var(--accent);transition:width .2s}.progress-fill.is-indeterminate{width:35%;animation:slide 1.2s ease-in-out infinite}@keyframes slide{0%{margin-left:-35%}to{margin-left:100%}}.alert{padding:10px 12px;border:1px solid var(--danger);border-radius:8px;color:var(--danger);font-size:12px;word-break:break-word}.thumb{display:flex;align-items:center;gap:10px;font-size:12px}.thumb img{width:64px;height:64px;object-fit:cover;border:1px solid var(--line);border-radius:8px}.muted{color:var(--muted)}@media(max-width:860px){.layout{grid-template-columns:1fr}.stage{height:55vh}.panel{border-left:0;border-top:1px solid var(--line)}}.viewer-stack{position:relative;flex:1;min-height:0}.viewer-slot{position:absolute;inset:0;display:flex;flex-direction:column}.viewer-slot.is-hidden{visibility:hidden;pointer-events:none}.segmented-wrap{display:flex;flex-direction:column;gap:6px}.segmented{display:flex;gap:3px;padding:3px;border-radius:8px;background:var(--bg)}.segmented button{flex:1;padding:7px 4px;border:0;border-radius:6px;background:transparent;color:var(--muted);font-size:12px;font-weight:600}.segmented button.is-active{background:var(--accent);color:#08111f}.segmented-wrap small,.note{margin:0;color:var(--muted);font-size:11px;line-height:1.5}.note strong{color:var(--text);font-weight:600}