body { font-family: sans-serif; margin: 0; color: #222; background: #fdfbf7; }
.site-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; background: #fff3d6; }
.site-header nav a { margin-left: 1rem; }
.container { max-width: 720px; margin: 0 auto; padding: 1.5rem; }
.theme-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.theme-card { border: 1px solid #eadfc4; border-radius: 8px; padding: 1rem; }
.btn { display: inline-block; padding: 0.5rem 1rem; background: #e08a2c; color: #fff; border-radius: 6px; text-decoration: none; }
.muted { color: #777; }
.error { color: #b00020; }
.messages { list-style: none; padding: 0; }
.messages .error { padding: 0.5rem; background: #fde2e2; border-radius: 4px; }
.messages .success { padding: 0.5rem; background: #e1f5e1; border-radius: 4px; }
form label { display: block; margin-bottom: 0.75rem; }