/* Alert Styles */
.alert {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 10px;
    padding: 0.6rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 1050;
    transition: top 0.3s ease-in-out;
    max-width: 90%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    font-size: 0.95rem;
}

.alert i {
    color: #721c24;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.alert.show {
    top: 80px;
}

@media (max-width: 768px) {
    .alert {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        max-width: 85%;
    }

    .alert.show {
        top: 70px;
    }

    .alert i {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .alert {
        padding: 0.4rem 0.9rem;
        font-size: 0.8rem;
        max-width: 80%;
    }
}

/* C Programming Quiz Specific Styles */
:root {
    --c-primary: #0077b6;
    --c-secondary: #00b4d8;
    --c-accent: #90e0ef;
    --c-dark: #03045e;
    --c-light: #caf0f8;
    --c-gradient: linear-gradient(135deg, #0077b6 0%, #03045e 100%);
    --c-gradient-light: linear-gradient(135deg, #90e0ef 0%, #0077b6 100%);
    --c-shadow: 0 8px 30px rgba(0, 119, 182, 0.1);
    --c-card-radius: 16px;
    --c-button-radius: 10px;
}

.quiz-header {
    background: var(--c-gradient);
    padding: 4rem 0;
    text-align: center;
    color: white;
    border-radius: 0 0 30px 30px;
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(3, 4, 94, 0.2);
}

.quiz-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.quiz-header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -30%;
    width: 80%;
    height: 80%;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.quiz-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    font-family: var(--heading-font);
    letter-spacing: -0.02em;
    position: relative;
    z-index: 2;
}

.quiz-header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
    position: relative;
    z-index: 2;
}

.quiz-container {
    padding: 2rem 0 5rem;
}

.quiz-container .container {
    max-width: 850px;
    width: 100%;
}

.quiz-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 2.5rem;
    background: white;
    border-radius: var(--c-card-radius);
    padding: 1.8rem;
    box-shadow: var(--c-shadow);
    border: 1px solid rgba(0, 119, 182, 0.08);
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
}

.info-item i {
    font-size: 2rem;
    color: var(--c-primary);
    background: var(--c-light);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.info-item span {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--c-dark);
}

.quiz-start {
    background: white;
    border-radius: var(--c-card-radius);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--c-shadow);
    margin-bottom: 2.5rem;
    border: 1px solid rgba(0, 119, 182, 0.08);
}

.quiz-start p {
    margin-bottom: 2rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #444;
}

.btn {
    background: var(--c-gradient);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--c-button-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--body-font);
    font-size: 1.05rem;
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.2);
    letter-spacing: 0.02em;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 119, 182, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
    box-shadow: 0 5px 15px rgba(108, 117, 125, 0.2);
}

.btn-secondary:hover {
    box-shadow: 0 8px 20px rgba(108, 117, 125, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.2);
}

.btn-success:hover {
    box-shadow: 0 8px 20px rgba(46, 204, 113, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--c-primary);
    color: var(--c-primary);
    box-shadow: none;
}

.btn-outline:hover {
    background: rgba(0, 119, 182, 0.1);
    box-shadow: 0 5px 15px rgba(0, 119, 182, 0.1);
}

.btn:disabled {
    background: #e9ecef;
    color: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.hidden {
    display: none;
}

/* Quiz Content Styles */
.quiz-content {
    background: white;
    border-radius: var(--c-card-radius);
    padding: 2.5rem;
    box-shadow: var(--c-shadow);
    border: 1px solid rgba(0, 119, 182, 0.08);
}

/* Prevent text selection in quiz content */
.quiz-content,
.quiz-content * {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.quiz-progress {
    margin-bottom: 2.5rem;
}

.progress-bar {
    height: 10px;
    background: #e9ecef;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 0.8rem;
}

.progress-fill {
    height: 100%;
    background: var(--c-gradient-light);
    width: 10%;
    /* Will be updated by JS */
    transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-text {
    text-align: right;
    font-size: 0.95rem;
    color: #6c757d;
    font-weight: 500;
}

.question-container {
    margin-bottom: 2.5rem;
}

.question-container h3 {
    font-size: 1.4rem;
    margin-bottom: 1.8rem;
    font-weight: 600;
    color: var(--c-dark);
    line-height: 1.5;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.option {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1.2rem 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    align-items: center;
    border: 1px solid #e9ecef;
}

.option:hover {
    background: var(--c-light);
    border-color: var(--c-accent);
    transform: translateX(5px);
}

.option input[type="radio"] {
    margin-right: 1rem;
    width: 20px;
    height: 20px;
    accent-color: var(--c-primary);
    cursor: pointer;
}

.option label {
    cursor: pointer;
    font-size: 1.05rem;
    width: 100%;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 2.5rem;
}

/* Quiz Results Styles */
.quiz-results {
    background: white;
    border-radius: var(--c-card-radius);
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--c-shadow);
    border: 1px solid rgba(0, 119, 182, 0.08);
}

.results-icon {
    font-size: 3rem;
    color: var(--c-primary);
    margin-bottom: 1.5rem;
}

.quiz-results h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--c-dark);
}

.quiz-results p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #444;
}

.results-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    background: #f8f9fa;
    border-radius: var(--c-card-radius);
    padding: 1.5rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
}

.detail-item span:first-child {
    font-weight: 500;
    color: #6c757d;
}

.detail-item span:last-child {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--c-primary);
}

.results-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Review Answers Styles */
.answers-review {
    background: white;
    border-radius: var(--c-card-radius);
    padding: 1.5rem;
    box-shadow: var(--c-shadow);
    margin-top: 2.5rem;
    border: 1px solid rgba(0, 119, 182, 0.08);
}

.answers-review h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--c-dark);
}

.review-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.review-item {
    background: #f8f9fa;
    border-radius: var(--c-card-radius);
    padding: 1.8rem;
    border-left: 5px solid #6c757d;
}

.review-item.correct {
    border-left-color: #2ecc71;
    background: rgba(46, 204, 113, 0.05);
}

.review-item.incorrect {
    border-left-color: #e74c3c;
    background: rgba(231, 76, 60, 0.05);
}

.review-question {
    display: flex;
    margin-bottom: 1.5rem;
    align-items: flex-start;
    gap: 1rem;
}

.question-text {
    font-weight: 600;
    font-size: 1.1rem;
    flex: 1;
}

.review-question .question-number {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #6c757d;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.review-item.correct .question-number {
    background: #2ecc71;
}

.review-item.incorrect .question-number {
    background: #e74c3c;
}

.review-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.review-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    background: white;
}

.option-text {
    flex: 1;
}

.review-option.selected {
    border: 1px solid #6c757d;
}

.review-option.correct {
    border: 1px solid #2ecc71;
    background: rgba(46, 204, 113, 0.1);
}

.review-option.incorrect {
    border: 1px solid #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}

.review-option i {
    font-size: 1rem;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.review-option i.fa-check {
    background: #2ecc71;
    color: white;
}

.review-option i.fa-times {
    background: #e74c3c;
    color: white;
}

.review-explanation {
    background: #e9ecef;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    color: #495057;
    border-left: 3px solid var(--c-primary);
}

.review-explanation strong {
    color: var(--c-dark);
    font-weight: 600;
}

.review-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2.5rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .quiz-info {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem;
    }

    .quiz-header {
        padding: 3rem 0;
    }

    .quiz-header h2 {
        font-size: 2rem;
    }

    .quiz-header p {
        font-size: 1rem;
    }

    .quiz-content,
    .quiz-start,
    .quiz-results,
    .answers-review {
        padding: 1.8rem;
    }

    .question-container h3 {
        font-size: 1.2rem;
    }

    .option {
        padding: 1rem;
    }

    .quiz-navigation,
    .results-actions,
    .review-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .review-item {
        padding: 1.5rem;
    }

    .answers-review .container {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }

    .review-question {
        flex-direction: column;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .results-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .results-actions .btn {
        width: 100%;
    }

    .review-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .review-actions button {
        width: 100%;
    }

    .answers-review {
        padding: 0.6rem;
    }

    .answers-review h3 {
        font-size: 1.5rem;
    }

    .review-item {
        padding: 1.2rem;
    }

    .review-option {
        padding: 0.7rem;
    }

    .review-explanation {
        padding: 0.8rem;
    }

    .quiz-container .container {
        padding-left: 0.8rem;
        padding-right: 0.8rem;
    }

    .info-item i {
        width: 50px;
        height: 50px;
        font-size: 1.6rem;
    }

    .container {
        width: 95%;
    }
}