/**
 * Custom CSS for Great Lancet Classes
 * Professional Institute Theme
 */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #198754;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --sidebar-width: 250px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    overflow-y: auto;
    z-index: 1000;
    background: linear-gradient(180deg, #0d6efd 0%, #0056b3 100%);
}

.sidebar-header {
    background: rgba(0, 0, 0, 0.1);
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 20px;
    margin: 5px 0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateX(5px);
}

.sidebar-nav .nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    font-weight: 600;
}

.sidebar-nav .nav-link i {
    margin-right: 10px;
    width: 20px;
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 20px;
    min-height: 100vh;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px 12px 0 0 !important;
    padding: 15px 20px;
    font-weight: 600;
}

/* Statistics Cards */
.stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.stat-card.stat-success {
    border-left-color: var(--success-color);
}

.stat-card.stat-warning {
    border-left-color: var(--warning-color);
}

.stat-card.stat-danger {
    border-left-color: var(--danger-color);
}

.stat-card.stat-info {
    border-left-color: var(--info-color);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    opacity: 0.3;
    float: right;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin: 10px 0;
}

.stat-card .stat-label {
    color: #6c757d;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5568d3 0%, #653a8f 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Tables */
.table {
    background: white;
    border-radius: 12px;
    overflow: hidden;
}

.table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.table thead th {
    border: none;
    padding: 15px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: background-color 0.2s ease;
}

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

.table tbody td {
    padding: 15px;
    vertical-align: middle;
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
}

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #dee2e6;
    padding: 10px 15px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.input-group-text {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 8px 0 0 8px;
}

/* Alerts */
.alert {
    border-radius: 8px;
    border: none;
    padding: 15px 20px;
}

/* Exam Timer */
.exam-timer {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 25px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    font-size: 1.2rem;
    font-weight: 700;
}

.exam-timer.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    animation: pulse 1s infinite;
}

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

/* Question Card */
.question-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.question-number {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    text-align: center;
    line-height: 35px;
    font-weight: 700;
    margin-right: 15px;
}

.question-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: #333;
}

.option-item {
    padding: 12px 15px;
    margin: 10px 0;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.option-item:hover {
    border-color: var(--primary-color);
    background-color: #f8f9fa;
}

.option-item.selected {
    border-color: var(--primary-color);
    background-color: rgba(13, 110, 253, 0.1);
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Page Header */
.page-header {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0;
}

/* Pagination */
.pagination {
    margin-top: 20px;
}

.page-link {
    border-radius: 8px;
    margin: 0 3px;
    border: 1px solid #dee2e6;
    color: var(--primary-color);
}

.page-link:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
    
    .exam-timer {
        position: relative;
        top: 0;
        right: 0;
        margin-bottom: 20px;
    }
}

/* Print Styles */
@media print {
    .sidebar, .btn, .exam-timer {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
}