* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

/* Tabs */
.tabs {
    display: flex;
    background: #f5f5f5;
    border-bottom: 2px solid #ddd;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: #e0e0e0;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    border-bottom: 3px solid #667eea;
}

.badge {
    background: #ff4444;
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    margin-left: 5px;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 30px;
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    color: #333;
    margin-bottom: 25px;
}

/* Form Box */
.form-box {
    background: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
    max-width: 600px;
}

.form-box label {
    display: block;
    margin-bottom: 20px;
    font-weight: 500;
    color: #333;
}

.form-box input,
.form-box textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    margin-top: 5px;
}

.form-box input:focus,
.form-box textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-box textarea {
    min-height: 100px;
    resize: vertical;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin: 2px;
}

.btn-sm:hover {
    background: #5568d3;
}

.btn-verify {
    background: #4caf50;
}

.btn-verify:hover {
    background: #388e3c;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

table th, table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table tbody tr:hover {
    background: #f9f9f9;
}

table td.warning {
    color: #ff9800;
    font-weight: bold;
}

table td.danger {
    color: #f44336;
    font-weight: bold;
}

/* Status */
.status-verified {
    color: #2196f3;
    font-weight: bold;
}

.status-confirmed {
    color: #4caf50;
    font-weight: bold;
}

.status-pending {
    color: #ff9800;
    font-weight: bold;
}

/* QR Result */
#qr-result {
    margin-top: 30px;
    padding: 30px;
    background: #e3f2fd;
    border-radius: 10px;
    text-align: center;
}

#qr-display img {
    max-width: 400px;
    border: 5px solid #667eea;
    border-radius: 10px;
    margin: 20px 0;
}

/* Stats Summary */
.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
}

.stat-card h3 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

/* Alerts */
.alert-item {
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #ff9800;
    background: #fff3e0;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.alert-item.warning {
    border-left-color: #ff9800;
    background: #fff3e0;
}

.alert-item.info {
    border-left-color: #2196f3;
    background: #e3f2fd;
}

.timestamp {
    color: #999;
    font-size: 0.9em;
}

.no-data {
    text-align: center;
    padding: 40px;
    color: #999;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #000;
}

/* Responsive */
@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }
    
    table {
        font-size: 12px;
    }
    
    table th, table td {
        padding: 8px;
    }
}