/* ===== Exam Interface ===== */
.exam-container {
    max-width: 900px;
    margin: 0 auto;
}

.exam-header {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 80px;
    z-index: 10;
    box-shadow: var(--shadow-sm);
}

.exam-timer {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text);
}

.exam-timer.warning {
    color: var(--warning);
}

.exam-timer.danger {
    color: var(--danger);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.exam-timer svg {
    flex-shrink: 0;
}

.exam-info {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.exam-violation-count {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.exam-violation-count.safe {
    background: var(--success-bg);
    color: var(--success);
}

.exam-violation-count.caution {
    background: var(--warning-bg);
    color: #856404;
}

.exam-violation-count.critical {
    background: var(--danger-bg);
    color: var(--danger);
}

/* Question Cards */
.question-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
    transition: all var(--transition);
}

.question-card.answered {
    border-left: 3px solid var(--success);
}

.question-card.flagged {
    border-left: 3px solid var(--warning);
}

.question-number {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.question-number span {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
}

.question-points {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.question-text {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 16px;
    color: var(--text);
}

/* MCQ Options */
.mcq-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mcq-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.mcq-option:hover {
    border-color: var(--primary-light);
    background: var(--primary-bg);
}

.mcq-option.selected {
    border-color: var(--primary);
    background: var(--primary-bg);
}

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

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

.mcq-radio {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.mcq-option.selected .mcq-radio {
    border-color: var(--primary);
}

.mcq-option.selected .mcq-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
}

/* Essay Answer */
.essay-answer {
    position: relative;
}

.essay-answer textarea {
    min-height: 150px;
    font-size: 0.95rem;
    line-height: 1.7;
}

.word-count {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.word-count.over-limit {
    color: var(--danger);
    font-weight: 600;
}

/* Question Navigator */
.question-nav {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
}

.question-nav h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.question-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 6px;
}

.question-nav-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.question-nav-btn:hover {
    border-color: var(--primary);
}

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

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

.question-nav-btn.flagged {
    background: var(--warning);
    color: white;
    border-color: var(--warning);
}

/* Exam Submit Area */
.exam-submit-area {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    margin-top: 20px;
}

.exam-submit-area p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.exam-submit-summary {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
    font-size: 0.85rem;
}

.exam-submit-summary .count {
    font-weight: 700;
    font-size: 1.1rem;
}

/* Proctor Overlay */
.proctor-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--danger);
    color: white;
    padding: 8px 24px;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.webcam-preview {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 160px;
    height: 120px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.webcam-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Exam Creation Form */
.exam-builder {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
}

.question-builder {
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 12px;
    background: var(--bg);
}

.question-builder-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

/* Lockdown Mode */
.lockdown-active {
    user-select: none;
    -webkit-user-select: none;
}

.lockdown-active #sidebar,
.lockdown-active #mobile-nav {
    display: none !important;
}

.lockdown-active #main-content {
    margin-left: 0;
    max-width: 100%;
}

.lockdown-active .nav-search,
.lockdown-active .nav-actions > *:not(#btn-user-menu) {
    visibility: hidden;
}