* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', system-ui, sans-serif; background: #0f1117; color: #e8ecf4; }
a { color: #7db4ff; text-decoration: none; }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; border-bottom: 1px solid #222836; }
.brand { font-weight: 700; font-size: 1.2rem; }
.nav nav a { margin-left: 1rem; }
.hero, .card-wrap { max-width: 720px; margin: 4rem auto; padding: 0 1.5rem; }
.card { background: #171b26; border: 1px solid #2a3145; border-radius: 12px; padding: 2rem; }
.btn { display: inline-block; padding: 0.75rem 1.25rem; border-radius: 8px; border: 1px solid #3a4663; margin-right: 0.5rem; }
.btn.primary { background: #3b82f6; border-color: #3b82f6; color: #fff; }
label { display: block; margin: 1rem 0 0.35rem; }
input { width: 100%; padding: 0.7rem; border-radius: 8px; border: 1px solid #2a3145; background: #0f1117; color: #fff; }
button { margin-top: 1rem; padding: 0.75rem 1.25rem; border-radius: 8px; border: none; background: #3b82f6; color: #fff; cursor: pointer; }
.error { color: #ff7b7b; margin-top: 0.75rem; }
.success { color: #7dffb0; margin-top: 0.75rem; }
.meta { color: #9aa7c0; font-size: 0.9rem; }