:root{--bg: #f6f7f9;--surface: #ffffff;--border: #dfe3e8;--text: #1c2430;--muted: #5b6675;--accent: #2456d6;--accent-dark: #1c43ab;--danger: #c2362f;--green: #1e7d43;--amber: #9a6b00;--orange: #b3541e;--blue: #2456d6;--red: #c2362f}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.5}.shell{min-height:100vh;display:flex;flex-direction:column}.navbar{display:flex;align-items:center;justify-content:space-between;padding:.6rem 1.25rem;background:var(--surface);border-bottom:1px solid var(--border)}.brand{font-weight:700;font-size:1.1rem;color:var(--text);text-decoration:none;letter-spacing:.02em}.nav-links{display:flex;align-items:center;gap:1rem}.nav-links a{color:var(--muted);text-decoration:none}.nav-links a.active,.nav-links 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