:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f3f4f6;
    --sidebar-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --border-color: #e5e7eb;
    --success: #10b981;
    --danger: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

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

.sidebar-header h2 {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 700;
}

.sidebar-nav {
    padding: 24px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li a {
    display: block;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-nav li.active a, .sidebar-nav li a:hover {
    background-color: #eff6ff;
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Top Header */
.top-header {
    background-color: #ffffff;
    height: 70px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.search-bar input {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 300px;
    outline: none;
    font-size: 0.875rem;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-profile span {
    font-weight: 500;
    color: var(--text-secondary);
}

/* Content Area */
.content-area {
    padding: 32px;
    flex: 1;
    overflow-y: auto;
}

.page-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.page-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.metric-card {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.metric-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}

.metric-value {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.metric-change {
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

/* Chart Section */
.chart-section {
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.chart-placeholder {
    height: 300px;
    display: flex;
    align-items: flex-end;
    gap: 10%;
    padding: 0 5%;
}

.bar {
    flex: 1;
    background-color: rgba(37, 99, 235, 0.2);
    border-radius: 4px 4px 0 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.bar:hover {
    background-color: var(--primary-color);
}

@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-nav ul {
        display: flex;
        overflow-x: auto;
    }
    
    .sidebar-nav li a {
        border-right: none;
        border-bottom: 3px solid transparent;
    }
    
    .sidebar-nav li.active a {
        border-bottom: 3px solid var(--primary-color);
    }
}