body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: #f4f7f6; color: #333; margin: 0; padding: 20px; }
.container { max-width: 800px; margin: 0 auto; background: white; padding: 20px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
h1, h2 { color: #2c3e50; }
.nav { margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid #eee; display: flex; gap: 15px; }
.nav a { text-decoration: none; color: #3498db; font-weight: bold; }
input[type="text"], input[type="password"] { width: 100%; padding: 10px; margin: 8px 0; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; }
.btn { display: inline-block; padding: 10px 15px; background: #3498db; color: white; text-decoration: none; border-radius: 4px; border: none; cursor: pointer; text-align: center; font-size: 14px;}
.btn-danger { background: #e74c3c; }
.btn-success { background: #2ecc71; }
.btn-secondary { background: #95a5a6; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 14px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #ddd; }
.status-active { color: #2ecc71; font-weight: bold; }
.status-used { color: #e74c3c; font-weight: bold; }
.ticket-card { text-align: center; padding: 20px; border: 2px dashed #ccc; border-radius: 10px; }
.ticket-card img { max-width: 200px; margin: 20px 0; }
#reader { width: 100%; max-width: 500px; margin: 0 auto; }
@media (max-width: 600px) { table { display: block; overflow-x: auto; } }