/* ============================================
   QUIZ SYSTEM STYLES
   Modern, Clean, and Professional Design
   ============================================ */

/* Color Variables - Site Colors */
:root {
    --quiz-primary: #1eb2a6;
    --quiz-primary-dark: #179d92;
    --quiz-primary-light: #3cc4b9;
    --quiz-success: #10b981;
    --quiz-danger: #ef4444;
    --quiz-warning: #f59e0b;
    --quiz-info: #06b6d4;
    --quiz-gray-50: #f9fafb;
    --quiz-gray-100: #f3f4f6;
    --quiz-gray-200: #e5e7eb;
    --quiz-gray-300: #d1d5db;
    --quiz-gray-500: #6b7280;
    --quiz-gray-700: #374151;
    --quiz-gray-900: #111827;
    --quiz-gradient: linear-gradient(135deg, #1eb2a6 0%, #17a398 50%, #14948b 100%);
    --quiz-shadow: 0 10px 40px rgba(30, 178, 166, 0.15);
    --quiz-shadow-lg: 0 25px 60px rgba(30, 178, 166, 0.2);
}

/* Quiz Page Container */
.quiz-section {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    min-height: 60vh;
    padding: 60px 0;
}

/* Quiz Card Styles */
.quiz-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: var(--quiz-shadow);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.quiz-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--quiz-shadow-lg);
}

.quiz-card .card-body {
    padding: 25px;
}

.quiz-card .card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--quiz-gray-900);
    margin-bottom: 12px;
    line-height: 1.4;
}

.quiz-card .card-text {
    font-size: 0.95rem;
    color: var(--quiz-gray-500);
    line-height: 1.6;
}

/* Quiz Info Box */
.quiz-info-box {
    background: var(--quiz-gradient);
    border-radius: 16px;
    padding: 20px;
    color: #fff;
    margin-top: 20px;
}

.quiz-info-box .row>div {
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.quiz-info-box .row>div:last-child {
    border-right: none;
}

.quiz-info-box small {
    display: block;
    font-size: 0.75rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.quiz-info-box strong {
    font-size: 1.25rem;
    font-weight: 700;
}

/* Badge Styles */
.quiz-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.quiz-badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--quiz-primary);
}

.quiz-badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--quiz-success);
}

.quiz-badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--quiz-warning);
}

.quiz-badge-participants {
    background: var(--quiz-gray-100);
    color: var(--quiz-gray-700);
}

/* Start Button */
.quiz-start-btn {
    background: var(--quiz-gradient);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
}

.quiz-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    color: #fff;
}

.quiz-start-btn:disabled {
    background: var(--quiz-gray-300);
    box-shadow: none;
    cursor: not-allowed;
}

/* Question Card */
.question-card {
    background: #fff;
    border-radius: 24px;
    box-shadow: var(--quiz-shadow-lg);
    overflow: hidden;
    animation: fadeIn 0.5s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.question-card .card-header {
    background: var(--quiz-gradient);
    padding: 20px 25px;
    border: none;
}

.question-card .card-header h5 {
    color: #fff;
    margin: 0;
    font-weight: 600;
}

.question-card .card-body {
    padding: 35px;
}

/* Timer */
.quiz-timer {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

.quiz-timer.danger {
    background: rgba(239, 68, 68, 0.9);
    animation: shake 0.5s ease-in-out infinite;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-3px);
    }

    75% {
        transform: translateX(3px);
    }
}

/* Progress Bar */
.quiz-progress {
    height: 8px;
    background: var(--quiz-gray-200);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 30px;
}

.quiz-progress-bar {
    height: 100%;
    background: var(--quiz-gradient);
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* Question Number */
.question-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    margin-right: 15px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

/* Question Text */
.question-text {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--quiz-gray-900);
    line-height: 1.6;
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 2px solid var(--quiz-gray-100);
}

/* Answer Options */
.answer-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.answer-option {
    display: flex;
    align-items: center;
    padding: 18px 22px;
    background: var(--quiz-gray-50);
    border: 2px solid var(--quiz-gray-200);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.answer-option:hover {
    border-color: var(--quiz-primary-light);
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(5px);
}

.answer-option.selected {
    border-color: var(--quiz-primary);
    background: rgba(99, 102, 241, 0.1);
}

.answer-option.selected::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--quiz-gradient);
}

.answer-option input[type="radio"] {
    width: 22px;
    height: 22px;
    margin-right: 15px;
    accent-color: var(--quiz-primary);
}

.answer-option span {
    font-size: 1.05rem;
    color: var(--quiz-gray-700);
    font-weight: 500;
}

.answer-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--quiz-gray-200);
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--quiz-gray-700);
    margin-right: 15px;
    transition: all 0.3s ease;
}

.answer-option:hover .answer-letter,
.answer-option.selected .answer-letter {
    background: var(--quiz-primary);
    color: #fff;
}

/* Navigation Buttons */
.quiz-nav-btn {
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.quiz-nav-btn.primary {
    background: var(--quiz-gradient);
    border: none;
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.quiz-nav-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

/* Results Card */
.results-card {
    background: #fff;
    border-radius: 24px;
    box-shadow: var(--quiz-shadow-lg);
    text-align: center;
    padding: 50px 40px;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.result-icon {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 60px;
}

.result-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--quiz-success);
    animation: celebrate 0.8s ease;
}

@keyframes celebrate {

    0%,
    100% {
        transform: scale(1);
    }

    25% {
        transform: scale(1.1) rotate(-5deg);
    }

    50% {
        transform: scale(1.15);
    }

    75% {
        transform: scale(1.1) rotate(5deg);
    }
}

.result-icon.fail {
    background: rgba(239, 68, 68, 0.1);
    color: var(--quiz-danger);
}

.result-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.result-title.success {
    color: var(--quiz-success);
}

.result-title.fail {
    color: var(--quiz-danger);
}

.result-score {
    background: var(--quiz-gradient);
    border-radius: 20px;
    padding: 30px;
    color: #fff;
    margin: 30px 0;
    display: inline-block;
}

.result-score .score-value {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
}

.result-score .score-label {
    font-size: 1rem;
    opacity: 0.9;
    margin-top: 5px;
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 30px 0;
}

.result-stat {
    text-align: center;
}

.result-stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.result-stat-value.correct {
    color: var(--quiz-success);
}

.result-stat-value.wrong {
    color: var(--quiz-danger);
}

.result-stat-label {
    font-size: 0.9rem;
    color: var(--quiz-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Registration Form */
.registration-card {
    background: #fff;
    border-radius: 24px;
    box-shadow: var(--quiz-shadow-lg);
    overflow: hidden;
}

.registration-card .card-header {
    background: var(--quiz-gradient);
    padding: 25px 30px;
    border: none;
}

.registration-card .card-header h4 {
    color: #fff;
    margin: 0;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.registration-card .card-body {
    padding: 35px;
}

.quiz-form-group {
    margin-bottom: 20px;
}

.quiz-form-group label {
    font-weight: 600;
    color: var(--quiz-gray-700);
    margin-bottom: 8px;
    display: block;
    font-size: 0.95rem;
}

.quiz-form-control {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--quiz-gray-200);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--quiz-gray-50);
}

.quiz-form-control:focus {
    border-color: var(--quiz-primary);
    background: #fff;
    outline: none;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.quiz-form-control::placeholder {
    color: var(--quiz-gray-500);
}

/* Quiz Info Stats */
.quiz-stats-row {
    display: flex;
    gap: 20px;
    margin: 25px 0;
    flex-wrap: wrap;
}

.quiz-stat-item {
    flex: 1;
    min-width: 100px;
    background: var(--quiz-gray-50);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    border: 1px solid var(--quiz-gray-200);
    transition: all 0.3s ease;
}

.quiz-stat-item:hover {
    border-color: var(--quiz-primary-light);
    transform: translateY(-3px);
}

.quiz-stat-item i {
    font-size: 1.5rem;
    color: var(--quiz-primary);
    margin-bottom: 10px;
}

.quiz-stat-item h5 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--quiz-gray-900);
    margin: 0 0 5px 0;
}

.quiz-stat-item small {
    color: var(--quiz-gray-500);
    font-size: 0.85rem;
}

/* Tests List Page */
.tests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

/* Empty State */
.quiz-empty-state {
    text-align: center;
    padding: 80px 20px;
    background: #fff;
    border-radius: 20px;
    box-shadow: var(--quiz-shadow);
}

.quiz-empty-state i {
    font-size: 5rem;
    color: var(--quiz-gray-300);
    margin-bottom: 20px;
}

.quiz-empty-state h4 {
    color: var(--quiz-gray-700);
    font-weight: 600;
    margin-bottom: 10px;
}

.quiz-empty-state p {
    color: var(--quiz-gray-500);
}

/* Font Awesome 6 Compatibility */
.fas.fa-play::before {
    margin-right: 5px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .quiz-section {
        padding: 40px 0;
    }

    .question-card .card-body {
        padding: 25px 20px;
    }

    .question-text {
        font-size: 1.15rem;
    }

    .answer-option {
        padding: 15px 18px;
    }

    .result-score .score-value {
        font-size: 3rem;
    }

    .result-stats {
        gap: 25px;
    }

    .result-stat-value {
        font-size: 1.5rem;
    }

    .quiz-stats-row {
        gap: 15px;
    }

    .tests-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .quiz-timer {
        padding: 8px 15px;
        font-size: 0.95rem;
    }

    .quiz-nav-btn {
        padding: 14px 24px;
        font-size: 1rem;
    }

    .registration-card .card-body {
        padding: 25px 20px;
    }
}