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

:root {
    --bg-primary: #0f0f12;
    --bg-secondary: #18181b;
    --bg-tertiary: #1f1f23;
    --bg-card: #232329;
    --border-color: #2e2e35;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent-purple: #6366f1;
    --accent-purple-light: #818cf8;
    --accent-cyan: #22d3ee;
    --accent-green: #34d399;
    --accent-red: #f87171;
    --accent-orange: #fb923c;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.dashboard {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px;
    margin-bottom: 40px;
}

.logo span {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-purple-light);
}

.nav-item.active svg {
    stroke: var(--accent-purple-light);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    background: var(--bg-primary);
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.date-range {
    color: var(--text-secondary);
    font-size: 14px;
}

.header-right {
    display: flex;
    gap: 12px;
}

.btn-secondary, .btn-primary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--text-muted);
}

.btn-primary {
    background: var(--accent-purple);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-purple-light);
    transform: translateY(-1px);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    gap: 16px;
    transition: all 0.3s ease;
}

.metric-card:hover {
    border-color: var(--text-muted);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.metric-icon.revenue {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-purple-light);
}

.metric-icon.users {
    background: rgba(34, 211, 238, 0.15);
    color: var(--accent-cyan);
}

.metric-icon.orders {
    background: rgba(52, 211, 153, 0.15);
    color: var(--accent-green);
}

.metric-icon.conversion {
    background: rgba(251, 146, 60, 0.15);
    color: var(--accent-orange);
}

.metric-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-change {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 500;
}

.metric-change.positive {
    color: var(--accent-green);
}

.metric-change.negative {
    color: var(--accent-red);
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.chart-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.chart-legend {
    display: flex;
    gap: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.chart-container {
    height: 280px;
    position: relative;
}

/* Activity Section */
.activity-section {
    margin-bottom: 32px;
}

.activity-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
}

.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.activity-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.view-all {
    background: none;
    border: none;
    color: var(--accent-purple-light);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s ease;
}

.view-all:hover {
    color: var(--accent-purple);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.activity-item:hover {
    background: var(--bg-tertiary);
}

.activity-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.activity-avatar.purple {
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-purple-light);
}

.activity-avatar.cyan {
    background: rgba(34, 211, 238, 0.2);
    color: var(--accent-cyan);
}

.activity-avatar.green {
    background: rgba(52, 211, 153, 0.2);
    color: var(--accent-green);
}

.activity-avatar.orange {
    background: rgba(251, 146, 60, 0.2);
    color: var(--accent-orange);
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.activity-text strong {
    font-weight: 600;
}

.activity-time {
    font-size: 12px;
    color: var(--text-muted);
}

.activity-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.activity-badge.sale {
    background: rgba(52, 211, 153, 0.15);
    color: var(--accent-green);
}

.activity-badge.signup {
    background: rgba(34, 211, 238, 0.15);
    color: var(--accent-cyan);
}

.activity-badge.refund {
    background: rgba(248, 113, 113, 0.15);
    color: var(--accent-red);
}

.activity-badge.upgrade {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-purple-light);
}

/* Responsive */
@media (max-width: 1400px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 80px;
        padding: 16px 8px;
    }
    
    .logo span, .nav-item span {
        display: none;
    }
    
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    
    .main-content {
        margin-left: 80px;
        padding: 16px;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .header-right {
        width: 100%;
    }
    
    .btn-secondary, .btn-primary {
        flex: 1;
        justify-content: center;
    }
}