/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Dashboard Container */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.75rem;
}

.sidebar-nav {
    padding: 16px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    margin-bottom: 4px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.nav-item i {
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 24px 32px;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.header-left h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.date-filter select {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
}

.btn-export {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-export:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* KPI Section */
.kpi-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.kpi-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.kpi-card.primary::before { background: var(--primary-color); }
.kpi-card.secondary::before { background: var(--secondary-color); }
.kpi-card.tertiary::before { background: var(--success-color); }
.kpi-card.quaternary::before { background: var(--warning-color); }
.kpi-card.accent::before { background: var(--info-color); }
.kpi-card.success::before { background: var(--success-color); }

.kpi-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.kpi-card.primary .kpi-icon { background: rgba(99, 102, 241, 0.1); color: var(--primary-color); }
.kpi-card.secondary .kpi-icon { background: rgba(139, 92, 246, 0.1); color: var(--secondary-color); }
.kpi-card.tertiary .kpi-icon { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.kpi-card.quaternary .kpi-icon { background: rgba(245, 158, 11, 0.1); color: var(--warning-color); }
.kpi-card.accent .kpi-icon { background: rgba(6, 182, 212, 0.1); color: var(--info-color); }
.kpi-card.success .kpi-icon { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }

.kpi-content {
    flex: 1;
}

.kpi-content h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.kpi-change {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

/* Charts Section */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.chart-container.large {
    grid-column: 1 / -1;
}

.chart-container.medium {
    min-height: 400px;
}

.chart-container.small {
    min-height: 350px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.chart-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.chart-actions {
    display: flex;
    gap: 8px;
}

.chart-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.chart-btn:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.chart-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.chart-body {
    padding: 24px;
    height: calc(100% - 70px);
    min-height: 300px;
}

.chart-body canvas {
    max-height: 350px;
}

/* Table Section */
.table-section {
    margin-top: 24px;
}

.table-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.table-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.table-actions {
    display: flex;
    gap: 12px;
}

.search-input {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    width: 240px;
    outline: none;
}

.search-input:focus {
    border-color: var(--primary-color);
}

.btn-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.btn-filter:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.table-body {
    overflow-x: auto;
}

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

thead {
    background: var(--bg-dark);
}

th {
    padding: 14px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-primary);
}

tbody tr:hover {
    background: var(--bg-hover);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .charts-row {
        grid-template-columns: 1fr;
    }
    
    .chart-container.large {
        grid-column: 1;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar .logo span,
    .sidebar .nav-item span {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 16px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .kpi-section {
        grid-template-columns: 1fr;
    }
    
    .charts-row {
        grid-template-columns: 1fr;
    }
    
    .table-actions {
        flex-direction: column;
    }
    
    .search-input {
        width: 100%;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kpi-card {
    animation: fadeIn 0.5s ease forwards;
}

.kpi-card:nth-child(1) { animation-delay: 0.1s; }
.kpi-card:nth-child(2) { animation-delay: 0.2s; }
.kpi-card:nth-child(3) { animation-delay: 0.3s; }
.kpi-card:nth-child(4) { animation-delay: 0.4s; }
.kpi-card:nth-child(5) { animation-delay: 0.5s; }
.kpi-card:nth-child(6) { animation-delay: 0.6s; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}