/* Custom CSS for Quiz System */

/* Multiple Select Styling */
.form-check-input:checked + .form-check-label .border {
    border-color: #0d6efd !important;
    background-color: rgba(13, 110, 253, 0.1);
}

.form-check-label.option-button:hover .border {
    border-color: #0d6efd !important;
    background-color: rgba(13, 110, 253, 0.05);
    cursor: pointer;
}

.form-check-input {
    width: 1.2em;
    height: 1.2em;
}

/* Multiple Select Instructions */
.alert.alert-info {
    border-right: 4px solid #0dcaf0;
}

/* Checkbox and Radio Button Styling in Form */
.input-group-text input[type="checkbox"],
.input-group-text input[type="radio"] {
    width: 1.2em;
    height: 1.2em;
    margin: 0;
}

/* Highlight selected options in forms */
.input-group-text input[type="checkbox"]:checked,
.input-group-text input[type="radio"]:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

/* Font Family */
body {
    font-family: 'Heebo', Arial, sans-serif;
}

/* RTL Support */
[dir="rtl"] {
    text-align: right;
}

/* Custom Colors */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

/* Gradient Backgrounds */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.bg-gradient-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
}

.bg-gradient-info {
    background: linear-gradient(135deg, #17a2b8 0%, #6f42c1 100%);
}

.bg-gradient-warning {
    background: linear-gradient(135deg, #ffc107 0%, #fd7e14 100%);
}

/* Custom Border Colors */
.border-start-primary { border-left: 0.25rem solid var(--primary-color) !important; }
.border-start-success { border-left: 0.25rem solid var(--success-color) !important; }
.border-start-info { border-left: 0.25rem solid var(--info-color) !important; }
.border-start-warning { border-left: 0.25rem solid var(--warning-color) !important; }

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

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

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

.pulse { animation: pulse 2s infinite; }
.fade-in { animation: fadeIn 0.5s ease-out; }
.slide-in { animation: slideIn 0.5s ease-out; }

/* Card Hover Effects */
.card {
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15) !important;
}

/* Button Enhancements */
.btn {
    transition: all 0.3s ease;
    border-radius: 8px;
    font-weight: 500;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1.1rem;
}

/* Quiz Game Specific Styles */
.answer-option {
    transition: all 0.2s ease;
    min-height: 80px;
}

.answer-option:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.answer-option:disabled {
    opacity: 0.6;
    transform: none !important;
}

.answer-option.selected {
    background-color: var(--primary-color) !important;
    color: white !important;
    border-color: var(--primary-color) !important;
}

.answer-option.correct {
    background-color: var(--success-color) !important;
    color: white !important;
    border-color: var(--success-color) !important;
}

.answer-option.incorrect {
    background-color: var(--danger-color) !important;
    color: white !important;
    border-color: var(--danger-color) !important;
}

/* Timer Styles */
.timer-container {
    position: relative;
    display: inline-block;
}

.timer-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.timer-warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
    animation: pulse 1s infinite;
}

.timer-danger {
    background-color: var(--danger-color);
    color: white;
    animation: pulse 0.5s infinite;
}

/* Leaderboard Styles */
.leaderboard-item {
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.leaderboard-item:hover {
    background-color: rgba(0,0,0,0.05);
    border-left-color: var(--primary-color);
}

.leaderboard-item.rank-1 {
    background: linear-gradient(90deg, rgba(255,215,0,0.1) 0%, transparent 100%);
    border-left-color: #ffd700;
}

.leaderboard-item.rank-2 {
    background: linear-gradient(90deg, rgba(192,192,192,0.1) 0%, transparent 100%);
    border-left-color: #c0c0c0;
}

.leaderboard-item.rank-3 {
    background: linear-gradient(90deg, rgba(205,127,50,0.1) 0%, transparent 100%);
    border-left-color: #cd7f32;
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    transition: width 0.6s ease;
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading-shimmer 1.5s infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2.5rem;
    }
    
    .fa-10x {
        font-size: 6rem;
    }
    
    .answer-option {
        min-height: 60px;
        margin-bottom: 10px;
    }
    
    .btn-lg {
        padding: 10px 20px;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .fa-10x {
        font-size: 4rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bs-body-bg: #1a1a1a;
        --bs-body-color: #ffffff;
    }
    
    .card {
        background-color: #2d2d2d;
        border-color: #404040;
    }
    
    .bg-light {
        background-color: #2d2d2d !important;
    }
    
    .text-muted {
        color: #b0b0b0 !important;
    }
}

/* Accessibility Improvements */
.btn:focus,
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .btn {
        border-width: 2px;
    }
    
    .card {
        border-width: 2px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000;
        box-shadow: none;
    }
    
    .bg-primary,
    .bg-success,
    .bg-info,
    .bg-warning,
    .bg-danger {
        background: white !important;
        color: black !important;
        border: 1px solid #000;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

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

/* Utility Classes */
.min-vh-50 { min-height: 50vh; }
.min-vh-75 { min-height: 75vh; }
.min-vh-100 { min-height: 100vh; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

.user-select-none { user-select: none; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.position-sticky { position: sticky; }

.z-index-1 { z-index: 1; }
.z-index-2 { z-index: 2; }
.z-index-3 { z-index: 3; }