:root{--primary:#1a73e8;--primary-hover:#1557b0;--bg:#f8f9fa;--surface:#fff;--text:#202124;--text-secondary:#5f6368;--border:#dadce0;--success:#34a853;--error:#ea4335;--warning:#fbbc04;--radius:8px;--shadow:0 1px 3px #0000001f;--shadow-md:0 4px 6px #0000001a;--max-width:1200px}*{box-sizing:border-box;margin:0;padding:0}html,body{color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.app-header{background:var(--surface);border-bottom:1px solid var(--border);z-index:100;position:sticky;top:0}.nav-container{max-width:var(--max-width);justify-content:space-between;align-items:center;height:56px;margin:0 auto;padding:0 1.5rem;display:flex}.nav-logo{color:var(--primary);font-size:1.25rem;font-weight:700}.nav-logo:hover{text-decoration:none}.nav-links{gap:1.5rem;display:flex}.nav-links a{color:var(--text-secondary);font-size:.875rem;font-weight:500}.nav-links a:hover{color:var(--text);text-decoration:none}.main-content{max-width:var(--max-width);margin:0 auto;padding:2rem 1.5rem}.btn{border-radius:var(--radius);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:background .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem}.card:hover{box-shadow:var(--shadow-md)}.spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.badge{border-radius:12px;padding:.125rem .5rem;font-size:.75rem;font-weight:500;display:inline-block}.badge-success{color:var(--success);background:#e6f4ea}.badge-warning{color:#e37400;background:#fef7e0}.badge-error{color:var(--error);background:#fce8e6}.badge-info{color:var(--primary);background:#e8f0fe}@media (max-width:768px){.nav-container{padding:0 1rem}.main-content{padding:1rem}.nav-links{gap:1rem}}