body { font-family: system-ui, -apple-system, sans-serif; background: #0c0d0f; color: #e5e5e5; display: flex; justify-content: center; align-items: center; min-height: 100vh; margin: 0; }
.card { background: #1a1b1f; border-radius: 1rem; padding: 2rem 2.5rem; max-width: 420px; text-align: center; }
a { color: #c7d2fe; }
.spinner { display: inline-block; width: 1em; height: 1em; border: 2px solid #555; border-top-color: #c7d2fe; border-radius: 50%; animation: spin .6s linear infinite; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }