/**
 * Custom Styles
 * School Online MCQ Examination System
 */

/* Global Styles */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', 'Noto Sans Gujarati', 'Shruti', 'Lohit Gujarati', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Login Page Styles */
.auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Dashboard Cards */
.dashboard-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid #e5e7eb;
    transition: var(--transition);
    overflow: hidden;
}

.dashboard-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.dashboard-card .card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    border: none;
}

/* Statistics Cards */
.stat-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

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

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

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.stat-label {
    color: #6b7280;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5558e3, #7c3aed);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

/* Forms */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #d1d5db;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

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

.table thead th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    border: none;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.table tbody tr:hover {
    background-color: #f9fafb;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.badge-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.badge-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.badge-info {
    background: linear-gradient(135deg, var(--info-color), #2563eb);
}

/* Navigation */
.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

.dropdown-menu {
    border: none;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    border: none;
}

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

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.1));
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.1));
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(217, 119, 6, 0.1));
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(37, 99, 235, 0.1));
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* Progress Bars */
.progress {
    height: 0.75rem;
    border-radius: 0.375rem;
    background-color: #e5e7eb;
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

/* Pagination */
.pagination .page-link {
    border: none;
    color: var(--primary-color);
    font-weight: 500;
    margin: 0 0.125rem;
    border-radius: var(--border-radius);
}

.pagination .page-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: transparent;
}

/* Exam Timer */
.exam-timer {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: 0 10px 15px -3px rgba(239, 68, 68, 0.3);
}

.exam-timer.warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    animation: pulse 2s infinite;
}

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

/* Question Cards */
.question-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
    border: 1px solid #e5e7eb;
}

.question-card .question-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.option-card {
    background: #f9fafb;
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.option-card:hover {
    background: #f3f4f6;
    border-color: var(--primary-color);
}

.option-card.selected {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-color: var(--primary-color);
}

.option-card.correct {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.1));
    border-color: var(--success-color);
}

.option-card.incorrect {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.1));
    border-color: var(--danger-color);
}

/* Loading Spinner */
.spinner {
    border: 3px solid #f3f4f6;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .dashboard-card {
        margin-bottom: 1rem;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    .question-card {
        padding: 1rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .sidebar,
    .no-print {
        display: none !important;
    }
    
    .container-fluid {
        max-width: 100%;
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5558e3, #7c3aed);
}

/* Tooltips */
.tooltip {
    font-size: 0.875rem;
}

.tooltip .tooltip-inner {
    background: var(--dark-color);
    border-radius: var(--border-radius);
}

/* Modals */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

/* File Upload */
.file-upload-area {
    border: 2px dashed #d1d5db;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    background: white;
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--box-shadow);
}

/* Activity Feed */
.activity-item {
    padding: 1rem;
    border-left: 3px solid var(--primary-color);
    background: white;
    margin-bottom: 0.5rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.activity-item.success {
    border-left-color: var(--success-color);
}

.activity-item.warning {
    border-left-color: var(--warning-color);
}

.activity-item.danger {
    border-left-color: var(--danger-color);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #1f2937;
        --dark-color: #f3f4f6;
    }
    
    body {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    }
    
    .dashboard-card,
    .card,
    .table,
    .stat-card {
        background: #374151;
        color: var(--dark-color);
    }
}