*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, sans-serif; background: #0f1117; color: #e2e8f0; min-height: 100vh; }
header { background: #1a1f2e; padding: 1rem 2rem; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #2d3748; }
header h1 { font-size: 1.25rem; color: #63b3ed; }
nav a { color: #a0aec0; text-decoration: none; }
nav a:hover { color: #e2e8f0; }
main { max-width: 640px; margin: 3rem auto; padding: 0 1rem; }
footer { text-align: center; padding: 2rem; color: #4a5568; font-size: 0.8rem; }
.login-box, section { background: #1a1f2e; border: 1px solid #2d3748; border-radius: 8px; padding: 2rem; }
h2 { font-size: 1.5rem; margin-bottom: 1rem; color: #90cdf4; }
p { margin-bottom: 0.75rem; line-height: 1.6; color: #a0aec0; }
label { display: block; margin-bottom: 0.25rem; font-size: 0.875rem; color: #718096; }
input { width: 100%; padding: 0.5rem 0.75rem; margin-bottom: 1rem; background: #2d3748; border: 1px solid #4a5568; border-radius: 4px; color: #e2e8f0; font-size: 1rem; }
button, .btn { display: inline-block; padding: 0.6rem 1.5rem; background: #2b6cb0; color: #fff; border: none; border-radius: 4px; cursor: pointer; text-decoration: none; font-size: 1rem; }
button:hover, .btn:hover { background: #2c5282; }
pre.key-display { background: #0d1117; border: 1px solid #2d3748; border-radius: 4px; padding: 1rem; font-size: 0.75rem; overflow-x: auto; white-space: pre; color: #68d391; }
.flag-box { background: #1a2a1a; border: 2px solid #48bb78; border-radius: 6px; padding: 1.5rem; font-family: monospace; font-size: 1.1rem; color: #68d391; text-align: center; margin-top: 1rem; }
.vault-denied h2 { color: #fc8181; }
.vault-open h2 { color: #68d391; }
code { background: #2d3748; padding: 0.1em 0.4em; border-radius: 3px; font-family: monospace; color: #f6ad55; }