:root {
    --primary-color: #1976d2;
    --primary-dark: #1565c0;
    --accent-color: #ff4081;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--background-color);
    min-height: 100vh;
}

/* Navigation */
nav {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.brand-logo {
    font-weight: 500;
    display: flex;
    align-items: center;
}

.brand-logo i {
    margin-right: 10px;
}

/* Main Container */
.main-container {
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Search Section */
.search-section {
    background: var(--card-background);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.search-section h4 {
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    color: var(--text-primary);
}

.search-section h4 i {
    margin-right: 12px;
    color: var(--primary-color);
}

.search-controls {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.search-input-wrapper {
    flex: 1;
    min-width: 250px;
}

.search-input-wrapper .input-field {
    margin: 0;
}

.search-input-wrapper input {
    margin-bottom: 0;
}

.filter-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.chip {
    background-color: #e3f2fd;
    color: var(--primary-color);
    cursor: pointer;
    transition: background-color 0.3s;
}

.chip:hover {
    background-color: #bbdefb;
}

.chip.active {
    background-color: var(--primary-color);
    color: white;
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-background);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Cards */
.card-container {
    background: var(--card-background);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s;
}

.card-container:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.card-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f0f0;
}

.card-header h4 {
    margin: 0;
    display: flex;
    align-items: center;
    color: var(--text-primary);
}

.card-header h4 i {
    margin-right: 12px;
    color: var(--primary-color);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    background: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.empty-state i {
    font-size: 80px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.empty-state h5 {
    color: var(--text-primary);
    margin-bottom: 12px;
}

.empty-state p {
    color: var(--text-secondary);
}

/* View Toggle */
.view-toggle {
    display: flex;
    gap: 8px;
}

.view-toggle .btn-small {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.view-toggle .btn-small.active {
    background-color: var(--primary-color);
    color: white;
}

/* Buttons */
.btn, .btn-small, .btn-large {
    background-color: var(--primary-color);
}

.btn:hover, .btn-small:hover, .btn-large:hover {
    background-color: var(--primary-dark);
}

.btn.secondary, .btn-small.secondary, .btn-large.secondary {
    background-color: #546e7a;
}

.btn.secondary:hover, .btn-small.secondary:hover, .btn-large.secondary:hover {
    background-color: #455a64;
}

/* Tables */
.responsive-table {
    background: var(--card-background);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.responsive-table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.responsive-table thead th {
    color: white;
    font-weight: 500;
    padding: 16px;
}

.responsive-table tbody tr {
    transition: background-color 0.3s;
}

.responsive-table tbody tr:hover {
    background-color: #f5f5f5;
}

.responsive-table tbody td {
    padding: 14px 16px;
    color: var(--text-primary);
}

/* Loading Spinner */
.loading-container {
    display: flex;
    justify-content: center;
    padding: 60px;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 16px;
    text-decoration: none;
    transition: color 0.3s;
}

.back-link:hover {
    color: var(--primary-dark);
}

.back-link i {
    margin-right: 8px;
}

/* Responsive */
@media (max-width: 768px) {
    .search-controls {
        flex-direction: column;
    }

    .search-input-wrapper {
        width: 100%;
    }

    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-section {
        grid-template-columns: 1fr;
    }
}