* {
    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;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.controls {
    padding: 30px 40px;
    display: flex;
    gap: 15px;
    background: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.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-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.icon {
    font-size: 18px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 30px 40px;
    background: #f8f9fa;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 3em;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 2.5em;
    font-weight: 700;
    color: #333;
}

.stat-card.expired .stat-value {
    color: #dc3545;
}

.stat-card.expiring .stat-value {
    color: #ffc107;
}

.tabs {
    display: flex;
    gap: 10px;
    padding: 20px 40px;
    background: white;
    border-bottom: 2px solid #e0e0e0;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: transparent;
    border-bottom: 3px solid transparent;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    color: #666;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.badge {
    background: #667eea;
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    gap: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px 40px;
    border-left: 4px solid #dc3545;
    margin: 20px 40px;
    border-radius: 4px;
    display: none;
}

.tab-content {
    padding: 30px 40px;
}

.tab-pane {
    display: none;
}

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

.table-container {
    overflow-x: auto;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

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

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody tr {
    border-bottom: 1px solid #e0e0e0;
    transition: background 0.2s ease;
}

tbody tr:hover {
    background: #f8f9fa;
}

td {
    padding: 15px;
    font-size: 14px;
}

.empty-message {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 40px !important;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.status-critical {
    color: #dc3545;
    background: #f8d7da;
}

.status-warning {
    color: #856404;
    background: #fff3cd;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 10px 8px;
    }
}