/* Modern School Management System Theme */
:root {
    /* Primary Color Palette - Modern Blue Theme */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    /* Main Colors */
    --primary-color: var(--primary-600);
    --primary-dark: var(--primary-700);
    --primary-light: var(--primary-500);
    --primary-lighter: var(--primary-400);
    --primary-lightest: var(--primary-100);
    
    /* Background Colors */
    --body-bg: var(--primary-600);
    --content-bg: #f8fafc;
    --card-bg: #ffffff;
    --sidebar-bg: var(--primary-600);
    --navbar-bg: #ffffff;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #374151;
    --text-muted: #6b7280;
    --text-white: #ffffff;
    --text-light: #e5e7eb;
    
    /* Status Colors - Blue Variations */
    --success-color: var(--primary-500);
    --success-light: var(--primary-300);
    --warning-color: var(--primary-400);
    --warning-light: var(--primary-200);
    --danger-color: var(--primary-700);
    --danger-light: var(--primary-300);
    --info-color: var(--primary-600);
    --info-light: var(--primary-200);
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Spacing */
    --sidebar-width: 280px;
    --navbar-height: 70px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--content-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Wrapper */
.wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: #1e293b;
    z-index: 1000;
    transition: transform var(--transition-normal);
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    border-right: 1px solid #334155;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 2px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #334155;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #ffffff;
    font-weight: 600;
    font-size: 1.25rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: #334155;
    transition: all var(--transition-normal);
}

.sidebar-brand:hover {
    background: #475569;
    color: #ffffff;
    text-decoration: none;
}

.sidebar-brand i {
    font-size: 1.75rem;
    color: #60a5fa;
}

.sidebar-nav {
    padding: 1rem;
    list-style: none;
}

.nav-item {
    margin-bottom: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #cbd5e1;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.nav-link:hover {
    background: #475569;
    color: #ffffff;
    text-decoration: none;
}

.nav-link.active {
    background: #3b82f6;
    color: #ffffff;
}

.nav-link .material-icons {
    font-size: 1.25rem;
    min-width: 1.25rem;
}

.nav-link span {
    font-size: 0.95rem;
}

.nav-dropdown {
    margin-bottom: 0.25rem;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #cbd5e1;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-normal);
    background: transparent;
    border: none;
    cursor: pointer;
    font-weight: 500;
    width: 100%;
}

.nav-dropdown-toggle:hover {
    background: #475569;
    color: #ffffff;
}

.nav-dropdown-toggle .material-icons:first-child {
    font-size: 1.25rem;
    min-width: 1.25rem;
}

.nav-dropdown-toggle span {
    font-size: 0.95rem;
    margin-left: 10px;
}

.nav-dropdown-toggle .material-icons:last-child {
    font-size: 1rem;
    transition: transform var(--transition-normal);
}

.nav-dropdown.open .nav-dropdown-toggle .material-icons:last-child {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    list-style: none;
    padding: 0;
    margin: 0.25rem 0 0 0;
    background: #1e293b;
    border-radius: 8px;
    border: 1px solid #334155;
    overflow: hidden;
    max-height: 0;
    transition: max-height var(--transition-normal), opacity var(--transition-normal);
    opacity: 0;
}

.nav-dropdown.open .nav-dropdown-menu {
    max-height: 300px;
    opacity: 1;
}

.nav-dropdown-menu .nav-link {
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    margin: 0.125rem;
    border-radius: 6px;
    font-size: 0.875rem;
}

.nav-dropdown-menu .nav-link .material-icons {
    font-size: 1.125rem;
    min-width: 1.125rem;
}

.nav-dropdown-menu .nav-link span {
    font-size: 0.875rem;
}

/* Ripple Effect for Navigation Links */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Enhanced Scrollbar for Sidebar */
.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 2px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Mobile Responsive Enhancements */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 8px 0 32px rgba(0, 0, 0, 0.25);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
        animation: mobileSlideIn 0.3s ease-out;
    }
    
    @keyframes mobileSlideIn {
        from {
            transform: translateX(-100%);
        }
        to {
            transform: translateX(0);
        }
    }
    
    .profile-card {
        animation: none;
    }
    
    .sidebar-brand:hover {
        transform: none;
    }
    
    .nav-link:hover,
    .nav-dropdown-toggle:hover {
        transform: none;
    }
}

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

/* Top Navbar */
.top-navbar {
    background: var(--navbar-bg);
    height: var(--navbar-height);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Search Bar */
.search-container {
    position: relative;
}

.search-input {
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    background: #f7fafc;
    transition: all var(--transition-fast);
    width: 300px;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
    background: white;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    text-decoration: none;
    color: var(--text-primary);
}

.user-dropdown-toggle:hover {
    background: #f7fafc;
    text-decoration: none;
    color: var(--text-primary);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e2e8f0;
}

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

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1.2;
}

.user-role-top {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.2;
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 2rem;
    background: var(--content-bg);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--primary-100);
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-200);
}

.card-header {
    background: var(--primary-600);
    color: var(--text-white);
    padding: 1.5rem;
    border-bottom: none;
    font-weight: 600;
    font-size: 1.125rem;
}

.card-body {
    padding: 1.5rem;
}

/* Stats Cards */
.stats-card {
    background: var(--primary-50);
    border-left: 4px solid var(--primary-500);
    transition: all var(--transition-normal);
}

.stats-card:hover {
    border-left-color: var(--primary-600);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--primary-100);
}

.stats-card .card-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stats-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-700);
    margin-bottom: 0.25rem;
}

.stats-content p {
    color: var(--primary-600);
    font-weight: 500;
    margin: 0;
}

.stats-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-600);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
}

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary-600);
    color: var(--text-white);
}

.btn-primary:hover {
    background: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-white);
}

.btn-success {
    background: var(--primary-500);
    color: var(--text-white);
}

.btn-success:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-white);
}

.btn-warning {
    background: var(--primary-400);
    color: var(--text-white);
}

.btn-warning:hover {
    background: var(--primary-500);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-white);
}

.btn-danger {
    background: var(--primary-700);
    color: var(--text-white);
}

.btn-danger:hover {
    background: var(--primary-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    color: var(--text-white);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary-600);
    border: 2px solid var(--primary-600);
}

.btn-outline-primary:hover {
    background: var(--primary-600);
    color: var(--text-white);
    transform: translateY(-1px);
}

/* Form Controls */
.form-control {
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

/* Form Switches */
.form-check-input {
    width: 2.5rem;
    height: 1.25rem;
    background-color: #e5e7eb;
    border: none;
    border-radius: 1rem;
    transition: all var(--transition-fast);
}

.form-check-input:checked {
    background-color: var(--primary-600);
    border-color: var(--primary-600);
}

.form-check-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.form-switch .form-check-input {
    background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='3' fill='rgba(255,255,255,1.0)'/></svg>");
}

.form-switch .form-check-input:checked {
    background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='3' fill='rgba(255,255,255,1.0)'/></svg>");
}

.form-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    background: var(--primary-600);
    color: var(--text-white);
    font-weight: 600;
    border: none;
    padding: 1rem;
}

.table tbody td {
    padding: 1rem;
    border-color: #f1f5f9;
    vertical-align: middle;
}

.table tbody tr:hover {
    background: #f8fafc;
}

/* Alerts */
.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background: var(--primary-50);
    color: var(--primary-800);
    border-left: 4px solid var(--primary-500);
}

.alert-warning {
    background: var(--primary-100);
    color: var(--primary-700);
    border-left: 4px solid var(--primary-400);
}

.alert-danger {
    background: var(--primary-50);
    color: var(--primary-900);
    border-left: 4px solid var(--primary-700);
}

.alert-info {
    background: var(--primary-50);
    color: var(--primary-700);
    border-left: 4px solid var(--primary-600);
}

/* Badges */
.badge {
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.75rem;
}

.badge-primary {
    background: var(--primary-600);
    color: var(--text-white);
}

.badge-success {
    background: var(--primary-500);
    color: var(--text-white);
}

.badge-warning {
    background: var(--primary-400);
    color: var(--text-white);
}

.badge-danger {
    background: var(--primary-700);
    color: var(--text-white);
}

.badge-info {
    background: var(--primary-600);
    color: var(--text-white);
}

/* Progress Bars */
.progress {
    height: 8px;
    background: var(--primary-100);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-600);
    transition: width var(--transition-normal);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        display: none;
    }
    
    .mobile-overlay.active {
        display: block;
    }
    
    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-primary);
        cursor: pointer;
    }
    
    .search-input {
        width: 200px;
    }
    
    .user-info {
        display: none;
    }
    
    .content-area {
        padding: 1rem;
    }
    
    .top-navbar {
        padding: 0 1rem;
    }
    
    /* Mobile Navigation Adjustments */
    .sidebar-nav {
        padding: 1rem 0;
    }
    
    .nav-item {
        margin-bottom: 0.25rem;
    }
    
    .nav-link, .nav-dropdown-toggle {
        padding: 0.875rem 1.5rem;
        min-height: 52px;
    }
    
    .nav-dropdown-menu .nav-link {
        padding-left: 3.5rem;
        min-height: 44px;
    }
}

@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none;
    }
}

/* Dark Mode Support */
.dark-mode {
    --content-bg: #1a202c;
    --card-bg: #2d3748;
    --navbar-bg: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
}

.dark-mode .search-input {
    background: #4a5568;
    border-color: #4a5568;
    color: var(--text-primary);
}

.dark-mode .search-input:focus {
    background: #4a5568;
}

.dark-mode .form-control {
    background: #4a5568;
    border-color: #4a5568;
    color: var(--text-primary);
}

.dark-mode .table tbody tr:hover {
    background: #4a5568;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--text-white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Icon Styles */
.mdi, .material-icons {
    display: inline-block;
    font-style: normal;
    line-height: 1;
    vertical-align: middle;
}

.mdi {
    font-size: 1.25rem;
}

.mdi::before {
    vertical-align: middle;
}

/* Utility Classes */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.text-primary { color: var(--primary-600); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--text-white); }

.bg-primary { background: var(--primary-600); }
.bg-gradient-primary { background: var(--primary-600); }

/* Additional Color Utilities */
.text-primary-light { color: var(--primary-400); }
.text-primary-dark { color: var(--primary-800); }
.bg-primary-light { background: var(--primary-100); }
.bg-primary-dark { background: var(--primary-800); }
.border-primary { border-color: var(--primary-600); }
.border-primary-light { border-color: var(--primary-200); }

.transition-fast { transition: all var(--transition-fast); }
.transition-normal { transition: all var(--transition-normal); }
.transition-slow { transition: all var(--transition-slow); }

/* Custom Override for text-dark */
table th .text-dark {
    color: #fff !important;
}