/* QuizMaster CSS Styles */

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    background-color: #f5f5f5;
}
/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

/* Cards */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.quiz-card {
    position: relative;
    overflow: hidden;
}

.quiz-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(45deg, #0f5132, #198754);
}

/* Quiz Meta Information */
.quiz-meta {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 10px;
    font-size: 0.9rem;
}

/* Timer */
.timer {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
    animation: pulse 2s infinite;
}

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

.timer.warning {
    background: linear-gradient(135deg, #ffa500 0%, #ff6347 100%);
    animation: shake 0.5s infinite;
}

.timer.danger {
    background: linear-gradient(135deg, #ff4757 0%, #c44569 100%);
    animation: shake 0.3s infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Progress Bar */
.question-progress {
    height: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    transition: width 0.3s ease;
    border-radius: 5px;
}

/* Question Container */
.question-container {
    margin-bottom: 20px;
}

.question-text {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.5;
}

/* Options */
.option-container {
    margin-bottom: 15px;
}

.option-radio {
    display: none;
}

.option-label {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: white;
}

.option-label:hover {
    border-color: var(--primary-color);
    background-color: #f8f9ff;
}

.option-radio:checked + .option-label {
    border-color: var(--primary-color);
    background-color: #e7f3ff;
    color: var(--primary-color);
}

.option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background-color: #6c757d;
    color: white;
    border-radius: 50%;
    font-weight: bold;
    margin-right: 15px;
    transition: background-color 0.3s ease;
}

.option-radio:checked + .option-label .option-letter {
    background-color: var(--primary-color);
}

/* Navigation Buttons */
.nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding: 20px 0;
}

.question-nav-container {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
}

.question-nav {
    min-width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.question-nav.answered {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.question-nav.current {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Results */
.result-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
}

.score-display {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.score-percentage {
    font-size: 2.5rem;
    opacity: 0.9;
}

.stat-item {
    text-align: center;
    padding: 20px 0;
}

/* Answer Review */
.answer-review {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    border-left: 5px solid #e9ecef;
}

.answer-review.correct {
    border-left-color: var(--success-color);
    background: linear-gradient(135deg, #f8fff9 0%, #e8f5e8 100%);
}

.answer-review.incorrect {
    border-left-color: var(--danger-color);
    background: linear-gradient(135deg, #fff8f8 0%, #ffeaea 100%);
}

/* Leaderboard */
.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
    transition: background-color 0.3s ease;
}

.leaderboard-item:hover {
    background-color: #f8f9fa;
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.rank-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 20px;
    color: white;
    background-color: var(--secondary-color);
}

.rank-badge.gold {
    background: linear-gradient(135deg, #ffd700 0%, #ffb347 100%);
    color: #8b4513;
    animation: sparkle 2s infinite;
}

.rank-badge.silver {
    background: linear-gradient(135deg, #c0c0c0 0%, #a8a8a8 100%);
    color: #2f4f4f;
}

.rank-badge.bronze {
    background: linear-gradient(135deg, #cd7f32 0%, #b8860b 100%);
    color: white;
}

@keyframes sparkle {
    0%, 100% { box-shadow: 0 0 5px rgba(255, 215, 0, 0.5); }
    50% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.8), 0 0 30px rgba(255, 215, 0, 0.6); }
}

/* Dashboard Cards */
.dashboard-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #5a6fd8 100%);
    color: white;
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.dashboard-card:hover {
    transform: translateY(-3px);
}

.dashboard-card.bg-primary {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
}

.dashboard-card.bg-success {
    background: linear-gradient(135deg, #28a745 0%, #1e7e34 100%);
}

.dashboard-card.bg-info {
    background: linear-gradient(135deg, #17a2b8 0%, #117a8b 100%);
}

.dashboard-card.bg-warning {
    background: linear-gradient(135deg, #ffc107 0%, #d39e00 100%);
    color: #212529;
}

.dashboard-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.dashboard-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: #343a40;
    color: white;
    padding: 30px 0;
    margin-top: 50px;
}

.footer a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .timer {
        font-size: 1.5rem;
        padding: 15px;
    }
    
    .score-display {
        font-size: 3rem;
    }
    
    .score-percentage {
        font-size: 2rem;
    }
    
    .nav-buttons {
        flex-direction: column;
        gap: 20px;
    }
    
    .question-nav-container {
        order: -1;
        margin-bottom: 20px;
    }
    
    .dashboard-number {
        font-size: 2.5rem;
    }
    
    .leaderboard-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .rank-badge {
        margin: 0;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast Notifications */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1050;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    padding: 15px 20px;
    margin-bottom: 10px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 5px solid var(--success-color);
}

.toast.error {
    border-left: 5px solid var(--danger-color);
}

.toast.warning {
    border-left: 5px solid var(--warning-color);
}

/* Form Enhancements */
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

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

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

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


.explanation-box {
    background-color: #d1ecf1; /* light blue */
    color: #0c5460;            /* dark blue text */
    padding: 10px 15px;
    border-left: 5px solid #0c5460;
    border-radius: 4px;
}
.answer-review.correct {
    border-left: 5px solid #28a745; /* green for correct */
}
.answer-review.incorrect {
    border-left: 5px solid #dc3545; /* red for incorrect */
}