/* Digital Exams & Report Cards System Styles */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #56ab2f;
    --warning-color: #f093fb;
    --danger-color: #ff416c;
    --light-color: #f8f9ff;
    --dark-color: #2c3e50;
    --border-radius: 12px;
    --box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
    --gradient-warning: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-danger: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: ivory;
    min-height: 100vh;
    line-height: 1.6;
    position: relative;
}

/* Admin Dashboard Specific Styling */
.admin-dashboard {
    background: ivory;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: -1;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Navigation */
.navbar {
    background: var(--gradient-primary);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1000;
}

/* Fix dropdown menu z-index and positioning */
.navbar .dropdown-menu {
    z-index: 99999 !important;
    min-width: 200px;
    background: white !important;
    border: 1px solid #dee2e6 !important;
    border-radius: 0.375rem !important;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
    margin-top: 0.125rem !important;
    display: none !important;
}

.navbar .dropdown-menu.show {
    display: block !important;
}

.navbar .dropdown-menu .dropdown-item {
    color: #212529 !important;
    padding: 0.5rem 1rem !important;
    display: block !important;
    width: 100% !important;
    clear: both !important;
    font-weight: 400 !important;
    text-align: inherit !important;
    text-decoration: none !important;
    white-space: nowrap !important;
    background-color: transparent !important;
    border: 0 !important;
}

.navbar .dropdown-menu .dropdown-item:hover {
    color: #1e2125 !important;
    background-color: #e9ecef !important;
}

.navbar .dropdown-menu .dropdown-divider {
    height: 0 !important;
    margin: 0.5rem 0 !important;
    overflow: hidden !important;
    border-top: 1px solid #dee2e6 !important;
}

/* Enhanced Navigation for Admin Dashboard */
.admin-dashboard .navbar {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
    box-shadow: 0 8px 32px rgba(30, 60, 114, 0.5);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1000;
}

/* Admin Dashboard Dropdown Fix */
.admin-dashboard .navbar .dropdown-menu {
    z-index: 99999 !important;
    position: absolute !important;
    top: 100% !important;
    right: 0 !important;
    min-width: 200px;
    background: white !important;
    border: 1px solid #dee2e6 !important;
    border-radius: 0.375rem !important;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
    margin-top: 0.125rem !important;
    transform: translateZ(0) !important;
}

.admin-dashboard .navbar .dropdown-menu .dropdown-item {
    color: #212529 !important;
    padding: 0.5rem 1rem !important;
    display: block !important;
    width: 100% !important;
    clear: both !important;
    font-weight: 400 !important;
    text-align: inherit !important;
    text-decoration: none !important;
    white-space: nowrap !important;
    background-color: transparent !important;
    border: 0 !important;
}

.admin-dashboard .navbar .dropdown-menu .dropdown-item:hover {
    color: #1e2125 !important;
    background-color: #e9ecef !important;
}

.admin-dashboard .navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    color: white !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--light-color) !important;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Enhanced Cards for Admin Dashboard */
.admin-dashboard .card {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    position: relative;
    overflow: hidden;
}

.admin-dashboard .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #1e3c72, #2a5298, #667eea, #764ba2, #f093fb);
    background-size: 200% 100%;
    animation: gradientMove 4s ease infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    background: rgba(255, 255, 255, 0.98);
}

.card-header {
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    font-weight: 600;
    border: none;
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.card-header:hover::before {
    left: 100%;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.btn-primary:hover {
    background: var(--gradient-secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: var(--gradient-success);
    border: none;
    color: white;
}

.btn-success:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(86, 171, 47, 0.4);
}

.btn-warning {
    background: var(--gradient-warning);
    border: none;
    color: white !important;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.btn-warning:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(240, 147, 251, 0.4);
    color: white !important;
}

.btn-warning:focus {
    color: white !important;
    box-shadow: 0 0 0 0.2rem rgba(240, 147, 251, 0.5);
}

/* Notification Button Specific Styling */
.notification-btn {
    color: white !important;
    font-weight: 500 !important;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3) !important;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%) !important;
    border: none !important;
    padding: 10px 20px !important;
    border-radius: 8px !important;
    transition: all 0.3s ease !important;
}

.notification-btn:hover {
    color: white !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(240, 147, 251, 0.4) !important;
}

.notification-btn:focus {
    color: white !important;
    box-shadow: 0 0 0 0.2rem rgba(240, 147, 251, 0.5) !important;
}

.btn-danger {
    background: var(--gradient-danger);
    border: none;
    color: white;
}

.btn-danger:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 65, 108, 0.4);
}

/* Forms */
.form-control, .form-select, input[type="text"], input[type="email"], input[type="password"], 
input[type="number"], input[type="tel"], input[type="date"], input[type="time"], 
input[type="datetime-local"], input[type="url"], input[type="search"], 
textarea, select {
    border-radius: var(--border-radius);
    border: 2px solid rgba(102, 126, 234, 0.3) !important;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.form-control:focus, .form-select:focus, input[type="text"]:focus, input[type="email"]:focus, 
input[type="password"]:focus, input[type="number"]:focus, input[type="tel"]:focus, 
input[type="date"]:focus, input[type="time"]:focus, input[type="datetime-local"]:focus, 
input[type="url"]:focus, input[type="search"]:focus, textarea:focus, select:focus {
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25) !important;
    outline: none !important;
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
}

.input-group-text {
    background-color: var(--light-color);
    border: 2px solid #7abbfb;
    border-right: none;
}

/* Dashboard Stats */
.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s;
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
}

.stat-card:hover::before {
    left: 100%;
}

/* Stat card links */
a .stat-card {
    display: block;
    color: #bdfc11;
    text-decoration: none;
}

a:hover .stat-card {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
}

a:hover .stat-card::before {
    left: 100%;
}

/* Enhanced Stat Cards with Professional Gradients */
.stat-card:nth-child(1) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
}

.stat-card:nth-child(4) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
}

.stat-card:nth-child(5) {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    box-shadow: 0 8px 32px rgba(250, 112, 154, 0.4);
}

.stat-card:nth-child(6) {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    box-shadow: 0 8px 32px rgba(168, 237, 234, 0.4);
}

.stat-card:nth-child(7) {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    box-shadow: 0 8px 32px rgba(255, 154, 158, 0.4);
}

.stat-card:nth-child(8) {
    background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
    box-shadow: 0 8px 32px rgba(161, 140, 209, 0.4);
}

/* Professional Dashboard Header */
.admin-dashboard .h3 {
    color: #2c3e50;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* Enhanced Button Styling for Admin Dashboard */
.admin-dashboard .btn {
    border-radius: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* Button Toggle Effect - Black/White Background with White/Black Text */
.btn-toggle {
    background-color: white !important;
    color: black !important;
    border: 2px solid black !important;
    transition: all 0.3s ease !important;
}

.btn-toggle:hover {
    background-color: #f0f0f0 !important;
    color: black !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2) !important;
}

.btn-toggle.active {
    background-color: black !important;
    color: white !important;
    border: 2px solid black !important;
}

.btn-toggle.active:hover {
    background-color: #333 !important;
    color: white !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3) !important;
}


.admin-dashboard .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.admin-dashboard .btn:hover::before {
    left: 100%;
}

.admin-dashboard .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    animation: countUp 1s ease-out;
    color: #ffffff !important;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #ffffff !important;
}

/* Override text-warning color for stat cards */
.stat-card .text-warning {
    color: #ffffff !important;
}

/* Ensure text-white works on stat cards */
.stat-card .text-white {
    color: #ffffff !important;
}

@keyframes countUp {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* Floating particles effect for admin dashboard */
.admin-dashboard .floating-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.admin-dashboard .particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.admin-dashboard .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.admin-dashboard .particle:nth-child(2) { left: 20%; animation-delay: 1s; }
.admin-dashboard .particle:nth-child(3) { left: 30%; animation-delay: 2s; }
.admin-dashboard .particle:nth-child(4) { left: 40%; animation-delay: 3s; }
.admin-dashboard .particle:nth-child(5) { left: 50%; animation-delay: 4s; }
.admin-dashboard .particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.admin-dashboard .particle:nth-child(7) { left: 70%; animation-delay: 0.5s; }
.admin-dashboard .particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
.admin-dashboard .particle:nth-child(9) { left: 90%; animation-delay: 2.5s; }

@keyframes float {
    0%, 100% { 
        transform: translateY(100vh) rotate(0deg); 
        opacity: 0; 
    }
    10% { 
        opacity: 1; 
    }
    90% { 
        opacity: 1; 
    }
    100% { 
        transform: translateY(-100px) rotate(360deg); 
        opacity: 0; 
    }
}

/* Exam Timer */
.exam-timer {
    background: linear-gradient(135deg, var(--danger-color), #c0392b);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.exam-timer.warning {
    background: linear-gradient(135deg, var(--warning-color), #e67e22);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Question Cards */
.question-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

.question-card:hover {
    border-color: var(--secondary-color);
}

.question-number {
    background: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 1rem;
}

/* Progress Bar */
.progress {
    height: 8px;
    border-radius: var(--border-radius);
    background-color: #e9ecef;
}

.progress-bar {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
    border-radius: var(--border-radius);
}

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

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

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* Dark Mode Hover Enhancements */
[data-theme="dark"] .table tbody tr:hover {
    background-color: #3a3a3a !important;
    color: #ffffff !important;
    transition: all 0.2s ease !important;
}

[data-theme="dark"] .navbar .dropdown-menu .dropdown-item:hover {
    background-color: #404040 !important;
    color: #ffffff !important;
    border-left: 3px solid #667eea !important;
    padding-left: calc(0.5rem - 3px) !important;
    transition: all 0.2s ease !important;
}

[data-theme="dark"] .admin-dashboard .navbar .dropdown-menu .dropdown-item:hover {
    background-color: #404040 !important;
    color: #ffffff !important;
    border-left: 3px solid #667eea !important;
    padding-left: calc(0.5rem - 3px) !important;
    transition: all 0.2s ease !important;
}

[data-theme="dark"] .card-header-tabs .nav-link:hover {
    background-color: #404040 !important;
    color: #667eea !important;
    border-color: #404040 #404040 transparent !important;
    transform: translateY(-1px);
    transition: all 0.2s ease !important;
}

[data-theme="dark"] .card-header-tabs .nav-link.active {
    background-color: #2d2d2d !important;
    color: #667eea !important;
    border-color: #404040 #404040 #2d2d2d !important;
}

[data-theme="dark"] .card-header-tabs .nav-link.active:hover {
    background-color: #3a3a3a !important;
    color: #7c9eff !important;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1, #bee5eb);
    color: #0c5460;
}

/* Sidebar */
.sidebar {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    min-height: 100vh;
    padding: 0;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    position: relative;
    z-index: 1000;
}

/* Main Content */
.main-content {
    min-height: 100vh;
    padding: 1rem;
    background-color: #f8f9fa;
}

/* Ensure proper row alignment */
.container-fluid .row {
    margin: 0;
    /* min-height: 100vh; */
}

.container-fluid .row > [class*="col-"] {
    padding-left: 0;
    padding-right: 0;
    /* margin-right: 2rem; */
    /* margin-left: 20px; */

}

.container-fluid .row .col-md-3,
.container-fluid .row .col-lg-2 {
    padding-right: 0;
}

.container-fluid .row .main-content {
    padding-left: 0.5rem;
}

/* Remove extra spacing from cards */
.card {
    margin-bottom: 1rem;
    margin-right: 1rem;
}

.card-body {
    padding: 1rem;
}

/* Compact form spacing */
.form-label {
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.form-control, .form-select {
    margin-bottom: 0.5rem;
}

/* Remove extra spacing from buttons */
.btn {
    margin: 0.125rem;
}

/* Compact table spacing */
.table {
    margin-bottom: 0;
}

.table th, .table td {
    padding: 0.5rem;
    vertical-align: middle;
}

/* Remove empty space and compact layout */
.card-body {
    padding: 0.75rem;
}

/* Compact alert spacing */
.alert-sm {
    padding: 0.25rem 0.5rem;
    margin-bottom: 0.5rem;
}

/* Remove extra spacing from empty states */
.text-center.py-3 {
    padding: 1rem 0 !important;
}

/* Compact button spacing */
.btn-group .btn {
    margin: 0.125rem;
}

/* Reduce card margins */
.card.mb-4 {
    margin-bottom: 1rem !important;
}

/* Compact form spacing */
.row.g-2 {
    --bs-gutter-x: 0.5rem;
    --bs-gutter-y: 0.5rem;
}

.sidebar .nav-link {
    color: white !important;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    background-color: rgba(255,255,255,0.15);
    color: white !important;
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    background-color: var(--secondary-color);
    color: white !important;
    font-weight: 600;
    border-left: 4px solid white;
}

.sidebar .nav-link i {
    color: white;
    width: 20px;
    text-align: center;
}

/* Report Card Styles */
.report-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 1rem 0;
}

.report-header {
    text-align: center;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.school-logo {
    max-width: 100px;
    height: auto;
}

.student-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.grade-badge {
    background: linear-gradient(135deg, var(--success-color), #2ecc71);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
    }
    
    .stat-card .stat-number {
        font-size: 2rem;
    }
    
    .question-number {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }
}

/* Loading Spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Eye-catching Class ID Tags */
.class-id-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    margin: 8px;
    display: inline-block;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.class-id-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.class-id-tag:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.class-id-tag:hover::before {
    left: 100%;
}

/* Enhanced Section Headers */
.section-header {
    background: var(--gradient-primary);
    color: white;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.section-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Floating Elements */
.floating-element {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Glowing Effects */
.glow {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(102, 126, 234, 0.5); }
    to { box-shadow: 0 0 30px rgba(102, 126, 234, 0.8); }
}

/* Enhanced Download Button */
.download-btn {
    background: var(--gradient-success);
    color: white;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(86, 171, 47, 0.3);
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(86, 171, 47, 0.4);
}

.download-btn:hover::before {
    left: 100%;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .report-card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    body {
        background: white;
    }

    
}
.card_ml{
    margin-left: 20px !important;
    margin-right: 20px !important;
}

/* Tab Styling - Swapped: Active looks like inactive, Inactive looks like active */
.card-header-tabs .nav-link {
    background-color: #0066ff !important;
    color: #fff !important;
    border-color: #0066ff #0066ff transparent !important;
    border-bottom: 2px solid transparent !important;
    transition: all 0.3s ease;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Inactive tabs now have blue background (swapped from active) */
.card-header-tabs .nav-link:not(.active) {
    background-color: #0066ff !important;
    color: #fff !important;
    border-color: #0066ff #0066ff transparent !important;
    border-bottom: 3px solid #0066ff !important;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    box-shadow: 0 -2px 8px rgba(0, 102, 255, 0.15);
}

.card-header-tabs .nav-link:hover {
    background-color: #0052cc !important;
    color: #fff !important;
    border-color: #0052cc #0052cc transparent !important;
    transform: translateY(-1px);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Active tabs now have white background (swapped from inactive) */
.card-header-tabs .nav-link.active {
    background-color: #fff !important;
    color: #0066ff !important;
    border-color: #dee2e6 #dee2e6 #fff !important;
    border-bottom: 2px solid transparent !important;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 102, 255, 0.1);
    box-shadow: none;
}

.card-header-tabs .nav-link:focus {
    background-color: #0066ff !important;
    color: #fff !important;
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.25);
    outline: none;
}

.card-header-tabs .nav-link.active:focus {
    background-color: #fff !important;
    color: #0066ff !important;
    border-bottom: 2px solid transparent !important;
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.15);
}

/* Horizontal Tab Bar Styles */
.dashboard-tabs {
    background: #fff;
    border-radius: 12px 12px 0 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 0;
    padding: 0;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    border-bottom: 2px solid #e9ecef;
}

.dashboard-tabs::-webkit-scrollbar {
    height: 6px;
}

.dashboard-tabs::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.dashboard-tabs::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}

.dashboard-tabs::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.dashboard-tabs .nav {
    display: flex;
    flex-wrap: nowrap;
    border-bottom: none;
    margin: 0;
    padding: 0;
}

.dashboard-tabs .nav-item {
    margin: 0;
    flex-shrink: 0;
}

.dashboard-tabs .nav-link {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: #6c757d;
    font-weight: 500;
    border: none;
    border-bottom: 3px solid transparent;
    background: transparent;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
    text-decoration: none;
}

.dashboard-tabs .nav-link i {
    margin-right: 0.5rem;
    font-size: 1rem;
}

.dashboard-tabs .nav-link:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.05);
    border-bottom-color: rgba(102, 126, 234, 0.3);
}

.dashboard-tabs .nav-link.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    border-bottom-color: #667eea;
    font-weight: 600;
}

.dashboard-tabs .nav-link.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 3px 3px 0 0;
}

.dashboard-tab-content {
    background: #fff;
    border-radius: 0 0 12px 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    min-height: 400px;
}

.dashboard-tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.dashboard-tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive tabs */
@media (max-width: 768px) {
    .dashboard-tabs .nav-link {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .dashboard-tabs .nav-link i {
        margin-right: 0.25rem;
        font-size: 0.9rem;
    }
    
    .dashboard-tab-content {
        padding: 1rem;
    }
}