:root { color-scheme: light dark; }
body { font-family: Arial, sans-serif; margin: 0; padding: 32px; background: #0b0f14; color: #e6edf3; }
.card { max-width: 720px; margin: 40px auto; padding: 24px; border: 1px solid #223; border-radius: 12px; background: #0f1620; }
h1 { margin: 0 0 8px; font-size: 28px; }
.muted { color: #9aa4b2; }
.row { display: flex; gap: 12px; align-items: center; margin-top: 16px; }
button { padding: 10px 14px; border-radius: 10px; border: 1px solid #2b3a4f; background: #162235; color: #e6edf3; cursor: pointer; }
button:hover { filter: brightness(1.1); }
.footer { text-align: center; margin-top: 24px; color: #9aa4b2; font-size: 12px; }