:root{color-scheme:light dark;--bg: #ffffff;--fg: #1a1a1a;--muted: #6b7280;--border: #e5e7eb;--accent: #2563eb;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #111214;--fg: #f4f4f5;--muted: #9ca3af;--border: #2a2b2f}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg)}.app-shell{display:flex;flex-direction:column;min-height:100vh;max-width:640px;margin:0 auto}.app-content{flex:1;padding:16px 16px 80px}.navbar{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:space-around;background:var(--bg);border-top:1px solid var(--border);padding:8px 0;max-width:640px;margin:0 auto}.navbar__link{color:var(--muted);text-decoration:none;font-size:.8rem;padding:6px 8px;border-radius:6px}.navbar__link--active{color:var(--accent);font-weight:600}.centered{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px;text-align:center}.login-screen{display:flex;flex-direction:column;align-items:center;gap:12px;padding:48px 16px;text-align:center}.login-screen__logo{width:96px;height:96px;object-fit:contain;border-radius:20%}.card{border:1px solid var(--border);border-radius:10px;padding:16px;margin:16px 0}.muted{color:var(--muted)}.error-text{color:#dc2626}button{font:inherit;padding:8px 16px;border-radius:8px;border:1px solid var(--border);background:var(--accent);color:#fff;cursor:pointer}button:disabled{opacity:.6;cursor:default}