:root {
    --primary-color: #4F46E5;
    --sidebar-bg: #111827;
    --sidebar-text: #9CA3AF;
    --sidebar-active-bg: #374151;
    --sidebar-active-text: #FFFFFF;
    --main-bg: #F9FAFB;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --card-bg: #FFFFFF;
    --border-color: #E5E7EB;
    --green-light: #ECFDF5;
    --green-dark: #065F46;
    --red-light: #FEF2F2;
    --red-dark: #991B1B;
    --blue-light: #EFF6FF;
    --blue-dark: #1E40AF;
    --yellow-light: #FFFBEB;
    --yellow-dark: #92400E;

}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--main-bg);
    color: var(--text-primary);
    margin: 0;
    display: flex;
}

#root {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.dashboard {
    display: flex;
    width: 100%;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.sidebar-logo {
    background-color: var(--primary-color);
    border-radius: 8px;
    padding: 8px;
    color: white;
}

.sidebar-school-name {
    display: flex;
    flex-direction: column;
}

.sidebar-school-name span:first-child {
    font-weight: 600;
    color: var(--sidebar-active-text);
}

.sidebar-school-name span:last-child {
    font-size: 0.875rem;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--sidebar-text);
    font-weight: 500;
    margin-bottom: 4px;
    gap: 12px;
}

.nav-item:hover {
    background-color: #1F2937;
    color: var(--sidebar-active-text);
}

.nav-item.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

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

.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 400px;
}

.search-bar input {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 1rem;
}

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

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

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-info span {
    display: block;
}

.user-info span:first-child {
    font-weight: 600;
}

.user-info span:last-child {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.page-content {
    padding: 32px;
    flex-grow: 1;
}

.welcome-header {
    margin-bottom: 32px;
}

.welcome-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin: 0 0 4px 0;
}

.welcome-header p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

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

.stat-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.stat-card-title {
    font-weight: 500;
    color: var(--text-secondary);
}

.stat-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-card-icon.blue { background-color: var(--blue-light); color: var(--blue-dark); }
.stat-card-icon.green { background-color: var(--green-light); color: var(--green-dark); }
.stat-card-icon.red { background-color: var(--red-light); color: var(--red-dark); }

.stat-card-value {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-card-footer {
    font-size: 0.875rem;
}

.stat-card-footer .increase { color: var(--green-dark); }
.stat-card-footer .decrease { color: var(--red-dark); }

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

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

.chart-card-header h3 {
    margin: 0 0 4px 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.chart-card-header p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.chart-placeholder {
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.table-card h3 {
    margin: 0 0 16px 0;
    font-size: 1.125rem;
    font-weight: 600;
}

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

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

thead th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}