:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #4cc9f0;
    --info-color: #4895ef;
    --warning-color: #f72585;
    --danger-color: #7209b7;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    
    --footer-height: 50px;
    --sidebar-width: 0px;
    
    --body-bg: #f9fafb;
    --card-bg: #ffffff;
    --card-border: 1px solid rgba(0,0,0,0.05);
    --card-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
    --card-radius: 0.75rem;
    
    --font-family: 'Inter', 'Poppins', sans-serif;
    --font-size-base: 0.95rem;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: var(--body-bg);
    color: var(--dark-color);
}

.dashboard-content {
    padding: 2rem 0;
}

/* Dashboard Tabs */
.dashboard-tabs {
    background-color: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.dashboard-tabs .nav-tabs {
    border-bottom: var(--card-border);
    padding: 0 1rem;
    background-color: rgba(0,0,0,0.01);
}

.dashboard-tabs .nav-tabs .nav-link {
    border: none;
    border-bottom: 3px solid transparent;
    padding: 1rem 1.5rem;
    font-weight: 500;
    color: #6c757d;
    transition: all 0.2s;
}

.dashboard-tabs .nav-tabs .nav-link:hover {
    color: var(--primary-color);
    border-bottom-color: rgba(67, 97, 238, 0.3);
}

.dashboard-tabs .nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: transparent;
}

.dashboard-tabs .nav-tabs .nav-link .nav-icon {
    margin-right: 0.5rem;
}

.dashboard-tabs .tab-content {
    padding: 1.5rem;
}

/* Modern Cards */
.modern-card {
    background-color: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    height: 100%;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.modern-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.1);
}

.modern-card .card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: var(--card-border);
    background-color: rgba(0,0,0,0.01);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modern-card .card-header h3 {
    margin-bottom: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.modern-card .card-body {
    padding: 1.5rem;
}

/* Stats Cards */
.stats-card {
    border-radius: var(--card-radius);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    margin-bottom: 1.5rem;
    background-color: var(--card-bg);
    border: 0.5px solid rgba(0, 85, 140, 0.3);
    box-shadow: 0 0 0 1px rgba(0, 85, 140, 0.08), 0 2px 8px rgba(0, 85, 140, 0.06);
    transition: all 0.3s ease;
}

.stats-card:hover {
    border-color: rgba(0, 85, 140, 0.5);
    box-shadow: 0 0 0 1px rgba(0, 85, 140, 0.15), 0 8px 24px rgba(0, 85, 140, 0.15);
    transform: translateY(-3px);
}

.stats-card .stats-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2.5rem;
    opacity: 0.15;
}

.stats-card .stats-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.stats-card .stats-title {
    font-size: 1rem;
    color: #6c757d;
    margin-bottom: 0;
}

.stats-card .stats-change {
    display: flex;
    align-items: center;
    margin-top: 0.75rem;
    font-size: 0.85rem;
}

.stats-card .stats-change.positive {
    color: var(--success-color);
}

.stats-card .stats-change.negative {
    color: var(--danger-color);
}

.stats-card .stats-change i {
    margin-right: 0.25rem;
}

/* Chart Containers */
.chart-container {
    position: relative;
    width: 100%;
    height: 350px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .dashboard-tabs .nav-tabs .nav-link {
        padding: 0.75rem 1rem;
    }
    
    .dashboard-tabs .nav-tabs .nav-link .nav-text {
        display: none;
    }
    
    .dashboard-tabs .nav-tabs .nav-link .nav-icon {
        margin-right: 0;
    }
    
    .modern-card .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .modern-card .card-header .card-toolbar {
        margin-top: 0.75rem;
        width: 100%;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --body-bg: #121212;
        --card-bg: #1e1e1e;
        --card-border: 1px solid rgba(255,255,255,0.05);
        --card-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
        --dark-color: #e9ecef;
        --light-color: #212529;
    }
    
    .dashboard-tabs .nav-tabs {
        background-color: rgba(255,255,255,0.01);
    }
    
    .dashboard-tabs .nav-tabs .nav-link {
        color: #adb5bd;
    }
}