:root{--bg:#0f172a;--bg-card:#1e293b;--bg-hover:#334155;--text:#f1f5f9;--text-muted:#94a3b8;--accent:#38bdf8;--accent-dark:#0ea5e9;--danger:#ef4444;--success:#22c55e;--border:#334155;--radius:12px}*{margin:0;padding:0;box-sizing:border-box}body,html{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;min-height:100vh}a{color:var(--accent);text-decoration:none}button{font-family:inherit;cursor:pointer}.page-center{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted)}.spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}