*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,sans-serif;background:#f5f5f5;color:#1a1a1a;min-height:100vh}.centered{min-height:100vh;display:flex;align-items:center;justify-content:center}.card{background:#fff;border-radius:12px;padding:2.5rem;box-shadow:0 2px 16px #00000014;text-align:center;max-width:400px;width:100%}.card h1{font-size:1.8rem;margin-bottom:.75rem}.card p{color:#555;margin-bottom:1.5rem;line-height:1.5}.btn-primary{background:#4285f4;color:#fff;border:none;border-radius:8px;padding:.7rem 1.5rem;font-size:1rem;cursor:pointer;width:100%}.btn-primary:hover{background:#3367d6}.btn-secondary{background:transparent;color:#4285f4;border:1px solid #4285f4;border-radius:8px;padding:.5rem 1.2rem;font-size:.9rem;cursor:pointer}.btn-secondary:hover{background:#f0f4ff}.error-msg{color:#c0392b;background:#fdecea;border-radius:6px;padding:.5rem .75rem;font-size:.9rem;margin-bottom:1rem}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{background:#fff;border-bottom:1px solid #e5e5e5;padding:1rem 2rem;display:flex;align-items:center;justify-content:space-between}.app-header h1{font-size:1.4rem}.user-info{display:flex;align-items:center;gap:1rem;font-size:.9rem;color:#555}.app-content{padding:2rem;flex:1}