/* ===== Exam Page - Material Design 3 ===== */

/* Layout */
.exam-main {
    min-height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* Header Card - M3 Top App Bar style */
.exam-header-card {
    background: transparent;
    /* Use parent tint */
    border-bottom: 1px solid var(--md-outline-variant);
    padding: 20px 24px;
}

.exam-header {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.exam-info {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.exam-info h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.exam-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.exam-controls select {
    padding: 10px 16px;
    border-radius: var(--md-shape-sm);
    border: 1px solid var(--md-outline);
    background: var(--bg-card);
    /* Dynamic tint */
    color: var(--md-on-surface);
    font-family: var(--md-font);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--md-motion-duration-short);
}

.exam-controls select:focus {
    outline: none;
    border-color: var(--md-primary);
}

/* Score Display - M3 Card */
.exam-score-box {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-card);
    /* Dynamic tint */
    padding: 12px 20px;
    border-radius: var(--md-shape-md);
    box-shadow: var(--md-shadow-1);
}

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

.score-stat .stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
}

.score-stat .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.score-stat.correct .stat-value {
    color: var(--correct);
}

.score-stat.incorrect .stat-value {
    color: var(--incorrect);
}

.score-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Progress Section */
.exam-progress-section {
    background: transparent;
    /* Use parent tint */
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
}

.exam-progress-inner {
    max-width: 900px;
    margin: 0 auto;
}

.exam-progress {
    margin-bottom: 0;
}

.exam-progress .progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.exam-progress .progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-info .current-question {
    font-weight: 600;
    color: var(--text-primary);
}

.exam-stats {
    display: flex;
    gap: 20px;
}

.exam-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.exam-stats .correct {
    color: var(--correct);
    font-weight: 600;
}

.exam-stats .incorrect {
    color: var(--incorrect);
    font-weight: 600;
}

/* Main Content */
.exam-content {
    flex: 1;
    padding: 24px;
    background: var(--bg-primary);
}

/* Question Container - M3 Card */
.question-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--glass-material);
    /* Dynamic glass tint */
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--md-shape-md);
    padding: 32px;
    box-shadow: var(--md-shadow-1);
    animation: slideUp 0.3s ease;
}

/* Light theme: prefer M3 surface containers (less glass) */
[data-theme="light"] .question-container {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    box-shadow: var(--md-shadow-1);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

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

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

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.question-number {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    padding: 8px 16px;
    background: var(--accent-light);
    border-radius: var(--radius-full);
}

.hint-btn {
    padding: 10px 18px;
    background: var(--warning-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--warning);
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.hint-btn:hover {
    background: var(--warning);
    color: white;
}

.hint-btn.used {
    opacity: 0.5;
    cursor: not-allowed;
}

.question-text {
    font-size: 1.15rem;
    line-height: 1.9;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.question-text .highlight {
    background: rgba(245, 158, 11, 0.3);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Options - Enhanced */
.options {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.option {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 18px 22px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.option:hover:not(.disabled) {
    border-color: var(--accent);
    background: var(--accent-light);
    transform: translateX(4px);
}

.option.correct {
    border-color: var(--correct);
    background: var(--correct-bg);
}

.option.incorrect {
    border-color: var(--incorrect);
    background: var(--incorrect-bg);
}

.option.selected {
    border-color: var(--accent);
    background: var(--accent-light);
}

.option.disabled {
    cursor: default;
    pointer-events: none;
}

.option-letter {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    color: var(--accent);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.option.correct .option-letter {
    background: var(--correct);
    color: white;
}

.option.incorrect .option-letter {
    background: var(--incorrect);
    color: white;
}

.option-text {
    flex: 1;
    line-height: 1.7;
    padding-top: 6px;
    font-size: 1rem;
}

.option-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
}

/* Continue Button */
.continue-btn {
    width: 100%;
    padding: 18px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1.05rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 24px;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.continue-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.key-hint {
    opacity: 0.8;
    font-size: 0.9rem;
    font-weight: 400;
}

/* Exam Actions */
.exam-actions {
    max-width: 900px;
    margin: 24px auto 0;
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* Shake Animation */
@keyframes shake {

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

    25% {
        transform: translateX(-8px);
    }

    75% {
        transform: translateX(8px);
    }
}

.shake {
    animation: shake 0.4s ease;
}

/* Explanation Box - Enhanced */
.explanation-box {
    margin-top: 24px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 24px;
    animation: slideUp 0.5s ease;
    border-left: 5px solid var(--accent);
}

.explanation-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.gemini-badge {
    background: linear-gradient(90deg, #4285f4, #8b5cf6);
    color: white;
    padding: 5px 14px;
    border-radius: 14px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.explanation-text {
    color: var(--text-primary);
    line-height: 1.9;
    font-size: 0.98rem;
}

/* Toggle Inline */
.toggle-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 8px 14px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.toggle-inline:hover {
    border-color: var(--accent);
}

.toggle-inline input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* Mobile */
@media (max-width: 768px) {
    .exam-header-card {
        padding: 16px;
    }

    .exam-header {
        flex-direction: column;
        align-items: stretch;
    }

    .exam-info {
        flex-direction: column;
        align-items: flex-start;
    }

    .exam-info h2 {
        font-size: 1.2rem;
    }

    .exam-score-box {
        justify-content: space-around;
        width: 100%;
    }

    .exam-controls {
        width: 100%;
    }

    .exam-controls select {
        flex: 1;
    }

    .exam-progress-section {
        padding: 12px 16px;
    }

    .exam-content {
        padding: 16px;
    }

    .question-container {
        padding: 20px;
    }

    .question-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .question-text {
        font-size: 1rem;
    }

    .option {
        padding: 14px 16px;
    }

    .option-letter {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .option-text {
        padding-top: 4px;
        font-size: 0.95rem;
    }
}