body { font-family: 'Segoe UI', sans-serif; background: #fff; margin: 0; color: #333; }
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
header { text-align: center; padding: 20px; background: #f8f9fa; border-bottom: 4px solid #007bff; }
.btn { padding: 10px 20px; border: none; border-radius: 5px; cursor: pointer; color: #fff; margin: 5px; font-size: 14px; }
.btn-op { background: #007bff; } .btn-stu { background: #6c757d; } .btn-reg { background: #28a745; } .btn-adm { background: #dc3545; }
.btn-act { background: #17a2b8; padding: 5px 10px; font-size: 12px; } .btn-del { background: #dc3545; padding: 5px 10px; font-size: 12px;}
.form-box { max-width: 400px; margin: 50px auto; padding: 30px; box-shadow: 0 0 15px rgba(0,0,0,0.1); display: none; border-radius: 8px; border-top:5px solid #007bff; }
input, select { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box; }
.hidden { display: none; } .dash-head { display:flex; justify-content:space-between; align-items:center; background:#f1f3f5; padding:15px; border-radius:5px; }
.bus-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 15px; margin-top: 20px; }
.seat-box { border: 1px solid #ccc; border-radius: 8px; padding: 10px; text-align: center; cursor: pointer; transition: transform 0.2s; font-size: 13px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.seat-box:hover { transform: scale(1.03); }
.seat-free { background-color: #d4edda; border-color: #c3e6cb; color: #155724; }
.seat-active { background-color: #fff3cd; border-color: #ffeeba; color: #856404; }
.seat-expired { background-color: #f8d7da; border-color: #f5c6cb; color: #721c24; }
.matrix-tbl { width: 100%; border-collapse: collapse; font-size: 11px; } .matrix-tbl th, .matrix-tbl td { border: 1px solid #ddd; padding: 5px; text-align: center; }
.bg-red { background: #f8d7da; } .bg-yel { background: #fff3cd; } .bg-grn { background: #d4edda; }
.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); }
.modal-content { background-color: #fff; margin: 5% auto; padding: 20px; border: 1px solid #888; width: 90%; max-width: 400px; border-radius: 8px; }