:root{--bg: #f4f2ee;--surface: #ffffff;--text: #1f2328;--muted: #5f6670;--line: #d9d5cc;--accent: #c2410c;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}@media(prefers-color-scheme:dark){:root{--bg: #17191c;--surface: #212429;--text: #e8e6e3;--muted: #9aa1aa;--line: #353a41;--accent: #f97316}}*{box-sizing:border-box}body{margin:0;min-height:100vh}.topbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;padding:16px 24px 8px}.layout{display:grid;grid-template-columns:minmax(300px,440px) 1fr;gap:16px;padding:16px 24px 24px;min-height:calc(100vh - 90px)}.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column}.panel h2{margin:0 0 12px;font-size:1em;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.preview{position:sticky;top:16px;align-self:start;height:calc(100vh - 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