/* Premium CSS for Matrix Coding Solutions CPC Mock Test Portal */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #0f172a;       /* Slate 900 */
    --primary-light: #1e293b; /* Slate 800 */
    --primary-dark: #020617;  /* Slate 950 */
    
    --accent: #06b6d4;        /* Cyan 500 */
    --accent-hover: #0891b2;  /* Cyan 600 */
    --accent-light: #ecfeff;  /* Cyan 50 */
    
    --teal: #0d9488;          /* Teal 600 */
    --teal-light: #f0fdfa;    /* Teal 50 */
    
    --bg-main: #f8fafc;       /* Slate 50 */
    --bg-card: #ffffff;
    
    --text-main: #1e293b;     /* Slate 800 */
    --text-dark: #0f172a;     /* Slate 900 */
    --text-muted: #64748b;    /* Slate 500 */
    
    --border-color: #e2e8f0;  /* Slate 200 */
    --success: #22c55e;       /* Green 500 */
    --warning: #eab308;       /* Yellow 500 */
    --danger: #ef4444;        /* Red 500 */
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-dark);
    font-weight: 700;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

button {
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    border: none;
    outline: none;
    transition: var(--transition-fast);
}

/* Premium Layout Components */
.app-header {
    background-color: #ffffff;
    color: var(--text-dark);
    padding: 1rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 1.5px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--teal));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 1.25rem;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-subtext {
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    margin-top: -4px;
}

.user-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-nav .user-name {
    font-weight: 600;
    color: var(--text-dark);
}

.btn-logout {
    background-color: #f1f5f9;
    color: var(--text-main);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.btn-logout:hover {
    background-color: var(--danger);
    color: white;
    border-color: var(--danger);
}

/* Auth Pages Styling */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, var(--primary-light), var(--primary-dark));
    padding: 2rem;
}

.auth-card {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--accent), var(--teal));
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    font-size: 1.85rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-muted);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--accent), var(--teal));
    color: white;
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
    margin-top: 1rem;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 15px rgba(6, 182, 212, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.auth-footer a {
    font-weight: 600;
}

/* Alert Boxes */
.alert {
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-left: 4px solid transparent;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left-color: var(--danger);
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left-color: var(--success);
}

.alert-warning {
    background-color: #fef9c3;
    color: #854d0e;
    border-left-color: var(--warning);
}

/* Student Dashboard Styling */
.main-content {
    max-width: 1200px;
    margin: 2.5rem auto;
    padding: 0 1.5rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.card-header {
    border-bottom: 1.5px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.35rem;
    color: var(--text-dark);
}

/* Instructions card */
.instruction-list {
    margin-left: 1.25rem;
    margin-bottom: 1.5rem;
}

.instruction-list li {
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-item {
    background: var(--bg-main);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--border-color);
}

.stat-val {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* Exam Screen Layout */
.exam-layout {
    display: grid;
    grid-template-columns: 240px 1fr 280px;
    height: calc(100vh - 75px);
    overflow: hidden;
}

@media (max-width: 1100px) {
    .exam-layout {
        grid-template-columns: 200px 1fr;
    }
    .exam-right-sidebar {
        display: none; /* Hide question map or handle via drawer */
    }
}

.exam-left-sidebar {
    background-color: var(--primary-light);
    color: white;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.category-link {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    color: #94a3b8;
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    text-align: left;
}

.category-link:hover, .category-link.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.category-link.active {
    border-left: 3px solid var(--accent);
    background-color: rgba(6, 182, 212, 0.15);
}

.exam-main-panel {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-main);
    overflow-y: auto;
}

.exam-toolbar {
    background: var(--bg-card);
    padding: 1rem 2rem;
    border-bottom: 1.5px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

.timer-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-dark);
}

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

@keyframes pulse {
    from { opacity: 1; }
    to { opacity: 0.5; }
}

.question-area {
    flex: 1;
    padding: 2.5rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.question-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.question-num {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-hover);
    background: var(--accent-light);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}

.question-category-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.question-text {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.option-item:hover {
    background-color: var(--bg-main);
    border-color: var(--text-muted);
}

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

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

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

.option-item.selected .option-radio::after {
    content: '';
    width: 8px;
    height: 8px;
    background-color: white;
    border-radius: 50%;
}

.option-text {
    font-size: 0.95rem;
    font-weight: 500;
}

.navigation-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1.5px solid var(--border-color);
}

.btn-nav {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-nav-prev {
    background-color: #e2e8f0;
    color: var(--text-main);
}

.btn-nav-prev:hover {
    background-color: #cbd5e1;
}

.btn-nav-next {
    background: linear-gradient(135deg, var(--accent), var(--teal));
    color: white;
}

.btn-nav-flag {
    background-color: #fef3c7;
    color: #b45309;
}

.btn-nav-flag:hover {
    background-color: #fde68a;
}

.btn-nav-submit {
    background-color: var(--success);
    color: white;
}

.btn-nav-submit:hover {
    background-color: #16a34a;
}

.exam-right-sidebar {
    background-color: var(--bg-card);
    border-left: 1.5px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
}

.question-map-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.question-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.q-box {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.q-box:hover {
    border-color: var(--text-main);
    color: var(--text-dark);
}

.q-box.current {
    border-color: var(--accent);
    color: var(--accent-hover);
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
}

.q-box.answered {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.q-box.flagged {
    background-color: var(--warning);
    border-color: var(--warning);
    color: white;
}

.legend-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Results Overview Styling */
.results-header {
    text-align: center;
    padding: 3rem 0;
    background: radial-gradient(circle at top right, var(--primary-light), var(--primary-dark));
    color: white;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    position: relative;
    overflow: hidden;
}

.results-header h2 {
    color: white;
    font-size: 2.25rem;
}

.results-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    font-size: 1.15rem;
    font-weight: 700;
    border-radius: 9999px;
    margin-top: 1.5rem;
    text-transform: uppercase;
}

.badge-passed {
    background-color: rgba(34, 197, 94, 0.2);
    color: #4ade80;
    border: 1.5px solid #22c55e;
}

.badge-failed {
    background-color: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1.5px solid #ef4444;
}

.results-summary-row {
    display: flex;
    justify-content: space-around;
    padding: 2rem;
    background: var(--bg-card);
    border-bottom: 1.5px solid var(--border-color);
}

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

.result-card-val {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.result-card-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
}

.question-review-list {
    margin-top: 2rem;
}

.review-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    border-left: 4px solid transparent;
}

.review-item.correct {
    border-left-color: var(--success);
}

.review-item.incorrect {
    border-left-color: var(--danger);
}

.review-status {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.review-status.correct-txt { color: var(--success); }
.review-status.incorrect-txt { color: var(--danger); }

.review-explanation {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background-color: var(--bg-main);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-muted);
    border-left: 2px solid var(--accent);
}

/* Admin Dashboard Elements */
.admin-tabs {
    display: flex;
    border-bottom: 1.5px solid var(--border-color);
    margin-bottom: 2rem;
    gap: 1rem;
}

.admin-tab {
    padding: 1rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
}

.admin-tab:hover {
    color: var(--text-dark);
}

.admin-tab.active {
    color: var(--accent-hover);
    border-bottom-color: var(--accent);
}

.table-container {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

th, td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-main);
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover td {
    background-color: #f8fafc;
}

.btn-action {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.btn-approve {
    background-color: var(--success);
    color: white;
}

.btn-approve:hover {
    background-color: #16a34a;
}

/* Live Exam indicator */
.live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--success);
    font-weight: 700;
    text-transform: uppercase;
    background-color: #f0fdf4;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    border: 1px solid #bbf7d0;
}

.live-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    animation: flash 1s infinite alternate;
}

@keyframes flash {
    from { opacity: 1; }
    to { opacity: 0.2; }
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 9999px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(to right, var(--accent), var(--teal));
    border-radius: 9999px;
    transition: width var(--transition-normal);
}

/* Upgraded Logo Branding */
.logo-img {
    height: 48px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.25));
}

/* Paper Selection Dialog Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(2, 6, 17, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 550px;
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    position: relative;
    animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.paper-select-card {
    padding: 1.25rem;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.paper-select-card:hover {
    border-color: var(--accent);
    background-color: var(--accent-light);
}

.paper-select-card.selected {
    border-color: var(--accent);
    background-color: var(--accent-light);
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
}

/* File Upload Zone for Admin */
.upload-zone {
    border: 2.5px dashed #cbd5e1;
    padding: 3rem 2rem;
    border-radius: var(--radius-md);
    text-align: center;
    background: var(--bg-main);
    cursor: pointer;
    transition: var(--transition-fast);
    margin-bottom: 1.5rem;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background-color: var(--accent-light);
    border-style: dashed;
}

.upload-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
    display: inline-block;
}

.code-preview {
    background: #0f172a;
    color: #38bdf8;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.825rem;
    line-height: 1.4;
    overflow-x: auto;
    max-height: 250px;
    border: 1px solid #334155;
    margin-top: 1rem;
    text-align: left;
}

/* Subtle Brand Logo Watermark Layer */
body::before {
    content: "";
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-12deg);
    width: min(85vw, 600px);
    height: min(85vw, 600px);
    background-image: url('/logo.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0.04; /* Highly subtle watermark (4% opacity) to guarantee content contrast */
    pointer-events: none;
    z-index: -1;
}

/* Glassmorphism transparency override to allow watermark visibility */
.card {
    background: rgba(255, 255, 255, 0.94) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.exam-main-panel {
    background-color: transparent !important;
}

.question-card {
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.auth-card {
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* Adjust header logo scaling in horizontal bar */
.logo-img {
    height: 52px;
    max-height: 52px;
    object-fit: contain;
}

/* Persistent Watermark inside Exam Workspace Layout */
.exam-layout {
    position: relative;
}

.exam-layout::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 55%;
    transform: translate(-50%, -50%) rotate(-12deg);
    width: min(85vw, 550px);
    height: min(85vw, 550px);
    background-image: url('/logo.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0.05; /* 5% opacity to make it always visible in the background */
    pointer-events: none;
    z-index: 0;
}

.exam-sidebar, .exam-main-panel {
    position: relative;
    z-index: 1;
}

/* Premium Results Modal styles */
.results-card {
    max-width: 550px !important;
    text-align: center;
    padding: 3rem 2.5rem !important;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    background: rgba(255, 255, 255, 0.98) !important;
    animation: scaleUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1.5rem auto;
    font-size: 2.5rem;
    font-weight: bold;
    box-shadow: 0 8px 16px rgba(0,0,0,0.06);
}

.status-badge.pass {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 2px solid var(--success);
}

.status-badge.fail {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 2px solid var(--danger);
}

.results-stats {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    padding: 1.25rem;
    background-color: #f8fafc;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.25rem;
}

.stat-box .stat-label {
    display: block;
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    text-transform: uppercase !important;
    font-weight: 700 !important;
    letter-spacing: 1px !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: 1.2 !important;
}

.stat-box .stat-val {
    display: block;
    font-size: 1.5rem !important;
    font-weight: 800 !important;
    color: var(--text-dark) !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: 1.2 !important;
}

/* Post-exam review markings */
.option-item.correct-answer {
    background-color: rgba(16, 185, 129, 0.15) !important;
    border-color: var(--success) !important;
    color: #065f46 !important;
    font-weight: 600;
}

.option-item.incorrect-answer {
    background-color: rgba(239, 68, 68, 0.15) !important;
    border-color: var(--danger) !important;
    color: #991b1b !important;
}

.explanation-card {
    background-color: #f8fafc;
    border-left: 4px solid var(--teal);
    padding: 1.25rem;
    margin-top: 1rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.875rem;
    color: var(--text-main);
    text-align: left;
}

.explanation-card strong {
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.25rem;
}