/* Modern School Management System CSS */

/* CSS Variables */
:root {
    --primary-color: #1f2937;
    --secondary-color: #14b8a6;
    --accent-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --purple-color: #8b5cf6;
    --orange-color: #f97316;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-light: #d1d5db;
    
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --sidebar-width: 280px;
    --header-height: 70px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    overflow-x: hidden;
}

/* Layout Structure */
.dashboard-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-primary);
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px 16px;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-sidebar);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: var(--secondary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: 600;
}

.brand-text h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

.brand-text p {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.2;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    margin: 2px 8px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.15s ease;
    font-weight: 500;
    font-size: 14px;
}

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

.nav-item.active {
    background: #ecfdf5;
    color: var(--secondary-color);
    position: relative;
}

.nav-item.active::after {
    content: '';
    position: absolute;
    right: 8px;
    width: 4px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 50%;
}

.nav-item i {
    width: 20px;
    font-size: 18px;
    text-align: center;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Top Header */
.top-header {
    background: var(--bg-secondary);
    padding: 0 32px;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.header-left h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

.header-date {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.2;
}

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

.time-display {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-primary);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
}

.live-indicator {
    background: var(--success-color);
    color: white;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.2;
}

.user-role {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.2;
}

/* Page Content */
.page-content {
    flex: 1;
    padding: 32px;
    background: var(--bg-primary);
}

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

.dashboard-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
    line-height: 1.2;
}

.dashboard-title p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 16px;
}

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

.last-updated {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.last-updated span {
    color: var(--secondary-color);
    font-weight: 500;
}

.refresh-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 14px;
}

.refresh-btn:hover {
    background: #0f766e;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
    transition: all 0.15s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.stat-card.teal::before { background: var(--secondary-color); }
.stat-card.green::before { background: var(--success-color); }
.stat-card.blue::before { background: var(--accent-color); }
.stat-card.purple::before { background: var(--purple-color); }
.stat-card.orange::before { background: var(--orange-color); }

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    flex-shrink: 0;
}

.stat-card.teal .stat-icon { background: var(--secondary-color); }
.stat-card.green .stat-icon { background: var(--success-color); }
.stat-card.blue .stat-icon { background: var(--accent-color); }
.stat-card.purple .stat-icon { background: var(--purple-color); }
.stat-card.orange .stat-icon { background: var(--orange-color); }

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.stat-sublabel {
    font-size: 12px;
    color: var(--text-secondary);
}

.stat-indicator {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Secondary Stats */
.secondary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.secondary-stat-card {
    background: var(--bg-card);
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 16px;
}

.secondary-stat-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    font-size: 18px;
}

.secondary-stat-content {
    flex: 1;
}

.secondary-stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

.secondary-stat-action {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--secondary-color);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 14px;
}

.secondary-stat-action:hover {
    color: #0f766e;
}

/* Content Sections */
.attendance-section,
.quick-actions-section,
.recent-activity-section {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    margin-bottom: 32px;
}

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

.section-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.section-action {
    width: 32px;
    height: 32px;
    background: var(--secondary-color);
    border: none;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.15s ease;
}

.section-action:hover {
    background: #0f766e;
}

/* Attendance Progress */
.attendance-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
}

.attendance-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.attendance-stat.present {
    color: var(--success-color);
}

.attendance-stat.absent {
    color: var(--danger-color);
}

.progress-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--success-color));
    transition: width 0.5s ease;
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Quick Actions Grid */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.quick-action-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.15s ease;
    border: 1px solid var(--border-light);
}

.quick-action-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-action-card.teal {
    background: #f0fdfa;
    border-color: #99f6e4;
}

.quick-action-card.blue {
    background: #eff6ff;
    border-color: #93c5fd;
}

.quick-action-card.purple {
    background: #f5f3ff;
    border-color: #c4b5fd;
}

.quick-action-card.green {
    background: #ecfdf5;
    border-color: #86efac;
}

.quick-action-card.orange {
    background: #fff7ed;
    border-color: #fed7aa;
}

.quick-action-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

.quick-action-card.teal .quick-action-icon { background: var(--secondary-color); }
.quick-action-card.blue .quick-action-icon { background: var(--accent-color); }
.quick-action-card.purple .quick-action-icon { background: var(--purple-color); }
.quick-action-card.green .quick-action-icon { background: var(--success-color); }
.quick-action-card.orange .quick-action-icon { background: var(--orange-color); }

.quick-action-content h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px 0;
}

.quick-action-content p {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 0;
}

/* Recent Activity */
.activity-list {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-light);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 16px;
}

.activity-content {
    flex: 1;
}

.activity-user {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    margin-bottom: 2px;
}

.activity-details {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.activity-action {
    font-size: 12px;
    color: var(--secondary-color);
    font-weight: 500;
}

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

.activity-status {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
}

.activity-status.present { color: var(--success-color); }
.activity-status.late { color: var(--warning-color); }
.activity-status.absent { color: var(--danger-color); }

.no-activity {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.no-activity i {
    font-size: 48px;
    margin-bottom: 16px;
}

/* System Status */
.system-status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.system-status-indicator i.online {
    color: var(--success-color);
}

.system-status-indicator span {
    color: var(--success-color);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .secondary-stats {
        grid-template-columns: 1fr;
    }
    
    .quick-actions-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .page-content {
        padding: 16px;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
    
    .user-info {
        display: none;
    }
    
    .dashboard-title h2 {
        font-size: 24px;
    }
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.refresh-btn.spinning i {
    animation: spin 1s linear infinite;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

.quick-actions h4 {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.quick-action-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-bottom: 8px;
}

.quick-action-btn.primary {
    background: var(--secondary-color);
    color: white;
}

.quick-action-btn.primary:hover {
    background: #0f766e;
}

.quick-action-btn.secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.quick-action-btn.secondary:hover {
    background: var(--border-light);
}

.quick-action-btn.tertiary {
    background: var(--accent-color);
    color: white;
}

.quick-action-btn.tertiary:hover {
    background: #2563eb;
}

/* Logout Section */
.logout-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--danger-color);
    color: white;
}

.logout-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.system-status {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.status-item i.online {
    color: var(--success-color);
}

.version {
    font-size: 11px;
    color: var(--text-muted);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 3px;
}

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