:root{--bg: #f6f7f9;--surface: #ffffff;--text: #1c2430;--muted: #6b7584;--border: #dfe3e8;--accent: #0b6bcb;--accent-text: #ffffff;--danger: #c0352b;--ok-bg: #e5f4e4;--err-bg: #fbebeb;--sidebar: #12324f;--sidebar-text: #e4edf6;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:var(--bg)}h1{font-size:22px;margin:0}h2{font-size:17px;margin:0}h3{font-size:14px;margin:18px 0 8px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}a{color:var(--accent)}.muted{color:var(--muted)}.small{font-size:12px}.strong{font-weight:600}.center{min-height:100vh;display:grid;place-items:center;padding:16px}button{background:var(--accent);color:var(--accent-text);border:0;border-radius:6px;padding:8px 14px;font:inherit;cursor:pointer}button:disabled{opacity:.6;cursor:default}button.secondary{background:var(--surface);color:var(--text);border:1px solid 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