:root{--bg: #0e0f12;--panel: #16181d;--card: #1b1e24;--line: #2a2e37;--text: #e7e9ee;--muted: #8b92a1;--accent: #ffb547;--hl: #ff8a2a;--hover: #9fd3ff;--error: #ff6b6b;--ok: #7ad69a;color-scheme:dark;font-family:Pretendard,Apple SD Gothic Neo,Noto Sans KR,system-ui,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(1200px 600px at 20% -10%,#1c2130 0%,var(--bg) 60%)}a{color:var(--accent)}code{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.92em}.muted{color:var(--muted);font-weight:400}.top{padding:14px 20px 10px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:flex-start}.logo{flex:none;width:30px;height:30px;margin-top:2px;background:var(--accent);clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);box-shadow:inset 0 0 0 6px #0003}h1{margin:0;font-size:1.25rem;letter-spacing:-.01em}.intro{margin:4px 0 0;color:var(--muted);line-height:1.5}.layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;height:calc(100vh - 78px);min-height:520px}.stage{position:relative;min-width:0;border-right:1px solid var(--line)}.viewer{position:absolute;top:0;right:0;bottom:0;left:0}.viewer canvas{width:100%;height:100%;outline:none;cursor:crosshair}.progress{position:absolute;left:0;right:0;top:0;height:3px;background:#ffffff10}.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--hl));transition:width .15s}.status{position:absolute;left:14px;top:14px;max-width:calc(100% - 28px);padding:6px 10px;border-radius:8px;background:#0b0c0fcc;border:1px solid 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