/* =============================================================================
   COMPONENTS — "The Academic Editorial"
   No-border philosophy. Tonal layering. Ambient shadows only.
   ============================================================================= */

/* =============================================================================
   1. BUTTONS
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-lg);
    transition: all var(--duration-base) var(--ease-out);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

/* Primary — Gradient fill */
.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: var(--shadow-glass);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-ambient);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-glass);
}

/* Secondary — Tonal */
.btn-secondary {
    background-color: var(--surface-container-highest);
    color: var(--on-surface);
}

.btn-secondary:hover {
    background-color: var(--surface-container-high);
}

/* Tertiary — Text only */
.btn-tertiary {
    background: transparent;
    color: var(--primary);
    font-weight: 600;
    padding: var(--space-2) var(--space-4);
}

.btn-tertiary:hover {
    background-color: var(--primary-fixed);
}

/* Danger */
.btn-danger {
    background-color: var(--error);
    color: var(--on-error);
}

.btn-danger:hover {
    opacity: 0.9;
}

/* Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.8125rem;
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

.btn-icon {
    padding: var(--space-2);
    border-radius: var(--radius-md);
}

/* Full width */
.btn-block {
    width: 100%;
}

/* Disabled */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}


/* =============================================================================
   2. CARDS — Surface-layered, no borders
   ============================================================================= */

.card {
    background-color: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-base) var(--ease-out);
}

.card-elevated {
    box-shadow: var(--shadow-ambient);
}

.card:hover {
    box-shadow: var(--shadow-ambient);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--on-surface);
}

.card-subtitle {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
    margin-top: var(--space-1);
}

.card-body {
    color: var(--on-surface);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
}


/* =============================================================================
   3. STAT CARDS — Dashboard metrics
   ============================================================================= */

.stat-card {
    background-color: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    transition: all var(--duration-base) var(--ease-out);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-ambient);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon-primary {
    background: var(--primary-fixed);
    color: var(--primary);
}

.stat-icon-success {
    background-color: var(--success-container);
    color: var(--on-success-container);
}

.stat-icon-tertiary {
    background-color: var(--tertiary-fixed);
    color: var(--tertiary);
}

.stat-icon-secondary {
    background-color: var(--surface-container-high);
    color: var(--on-surface-variant);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: var(--on-surface);
}

.stat-label {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
    font-weight: 500;
}

.stat-trend {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
}

.stat-trend-up {
    background-color: var(--success-container);
    color: var(--on-success-container);
}

.stat-trend-down {
    background-color: var(--error-container);
    color: var(--on-error-container);
}


/* =============================================================================
   4. INPUT FIELDS — Understated, bottom ghost-border
   ============================================================================= */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    letter-spacing: 0.02em;
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-container-lowest);
    border: none;
    border-bottom: 2px solid rgba(193, 198, 214, 0.20);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: 0.9375rem;
    color: var(--on-surface);
    transition: border-color var(--duration-base) var(--ease-out);
    outline: none;
}

.form-input:focus {
    border-bottom-color: var(--primary);
}

.form-input::placeholder {
    color: var(--outline);
}

.form-input-error {
    border-bottom-color: var(--error);
}

.form-error {
    font-size: 0.75rem;
    color: var(--error);
    font-weight: 500;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
}

/* Textarea */
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-container-lowest);
    border: none;
    border-bottom: 2px solid rgba(193, 198, 214, 0.20);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: 0.9375rem;
    color: var(--on-surface);
    resize: vertical;
    min-height: 100px;
    outline: none;
    transition: border-color var(--duration-base) var(--ease-out);
}

.form-textarea:focus {
    border-bottom-color: var(--primary);
}

/* Select */
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-container-lowest);
    border: none;
    border-bottom: 2px solid rgba(193, 198, 214, 0.20);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: 0.9375rem;
    color: var(--on-surface);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%23727785' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    padding-right: var(--space-10);
    transition: border-color var(--duration-base) var(--ease-out);
}

.form-select:focus {
    border-bottom-color: var(--primary);
}


/* =============================================================================
   5. UPLOAD ZONE — Editorial focal point
   ============================================================================= */

.upload-zone {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    min-height: 280px;
    padding: var(--space-10);
    background-color: var(--surface-container-high);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    opacity: 0;
    background: var(--primary-fixed);
    transition: opacity var(--duration-base) var(--ease-out);
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
    opacity: 1;
}

.upload-zone.dragover {
    background-color: var(--primary-fixed);
    backdrop-filter: blur(var(--glass-blur));
    transform: scale(1.01);
}

.upload-zone-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-primary);
    transition: transform var(--duration-base) var(--ease-spring);
}

.upload-zone:hover .upload-zone-icon {
    transform: translateY(-4px);
}

.upload-zone-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--on-surface);
    text-align: center;
}

.upload-zone-subtitle {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    text-align: center;
}

.upload-zone-formats {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    justify-content: center;
}


/* =============================================================================
   6. DATA TABLES — No divider lines, spaced rows
   ============================================================================= */

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 var(--space-2);
}

.data-table thead th {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) var(--space-4);
    text-align: left;
}

.data-table tbody tr {
    background-color: var(--surface-container-lowest);
    transition: all var(--duration-fast) var(--ease-out);
    border-radius: var(--radius-md);
}

.data-table tbody tr:hover {
    box-shadow: var(--shadow-ambient);
}

.data-table tbody td {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    color: var(--on-surface);
    vertical-align: middle;
}

.data-table tbody td:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.data-table tbody td:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}


/* =============================================================================
   7. CHIPS / BADGES — Pill-shaped status indicators
   ============================================================================= */

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.chip-excellent {
    background-color: var(--success-container);
    color: var(--on-success-container);
}

.chip-good {
    background-color: #e8f0fe;
    color: var(--primary);
}

.chip-average {
    background-color: var(--tertiary-fixed);
    color: var(--tertiary);
}

.chip-poor {
    background-color: var(--error-container);
    color: var(--on-error-container);
}

.chip-pending {
    background-color: var(--surface-container-high);
    color: var(--on-surface-variant);
}

.chip-processing {
    background-color: var(--primary-fixed);
    color: var(--primary);
}

/* Badge (numeric) */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 var(--space-2);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
}

.badge-primary {
    background: var(--primary);
    color: var(--on-primary);
}


/* =============================================================================
   8. PROGRESS BAR — Thin 4px, gradient indicator
   ============================================================================= */

.progress {
    width: 100%;
    height: 4px;
    background-color: var(--secondary-container);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow) var(--ease-out);
}

.progress-lg {
    height: 8px;
}

/* Progress with label */
.progress-labeled {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--on-surface);
}

.progress-value {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
}


/* =============================================================================
   9. DROPDOWN MENU
   ============================================================================= */

.dropdown {
    position: relative;
}

.dropdown-trigger {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + var(--space-2));
    min-width: 220px;
    background-color: var(--surface-container-lowest);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-elevated);
    padding: var(--space-2);
    z-index: var(--z-dropdown);
    backdrop-filter: blur(var(--glass-blur));
}

.dropdown-header {
    padding: var(--space-3) var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.dropdown-user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--on-surface);
}

.dropdown-user-email {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
}

.dropdown-divider {
    height: 1px;
    background-color: rgba(193, 198, 214, 0.20);
    margin: var(--space-1) 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--on-surface);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out);
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background-color: var(--surface-container-low);
}

.dropdown-item-danger {
    color: var(--error);
}

.dropdown-item-danger:hover {
    background-color: var(--error-container);
}


/* =============================================================================
   10. AVATAR
   ============================================================================= */

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-family: var(--font-display);
    background: var(--primary);
    color: var(--on-primary);
    flex-shrink: 0;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
}

.avatar-md {
    width: 40px;
    height: 40px;
    font-size: 0.875rem;
}

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: 1.125rem;
}


/* =============================================================================
   11. MODAL — Glassmorphic overlay
   ============================================================================= */

.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(25, 28, 29, 0.40);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--space-6);
}

.modal {
    background-color: var(--surface-container-lowest);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-elevated);
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) var(--space-6) var(--space-4);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
    background-color: var(--surface-container-high);
}

.modal-body {
    padding: 0 var(--space-6) var(--space-6);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
}


/* =============================================================================
   12. TOAST NOTIFICATIONS
   ============================================================================= */

.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-container-lowest);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-toast);
    min-width: 320px;
    max-width: 480px;
    backdrop-filter: blur(var(--glass-blur));
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon   { color: var(--error); }
.toast-info .toast-icon    { color: var(--primary); }

.toast-message {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--on-surface);
}

.toast-close {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    transition: background-color var(--duration-fast);
    flex-shrink: 0;
}

.toast-close:hover {
    background-color: var(--surface-container-high);
}


/* =============================================================================
   13. EMPTY STATE
   ============================================================================= */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16) var(--space-6);
    text-align: center;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-xl);
    background-color: var(--surface-container-high);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    margin-bottom: var(--space-6);
}

.empty-state-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--on-surface);
    margin-bottom: var(--space-2);
}

.empty-state-desc {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    max-width: 400px;
    margin-bottom: var(--space-6);
}


/* =============================================================================
   14. FILE LIST (Upload preview)
   ============================================================================= */

.file-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background-color: var(--surface-container-low);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out);
}

.file-item-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background-color: var(--primary-fixed);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.file-item-info {
    flex: 1;
    min-width: 0;
}

.file-item-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--on-surface);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item-size {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
}

.file-item-remove {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    flex-shrink: 0;
    transition: all var(--duration-fast);
}

.file-item-remove:hover {
    background-color: var(--error-container);
    color: var(--error);
}


/* =============================================================================
   16. TEMPLATE SELECTOR — Exam template picker with hover preview
   ============================================================================= */

/* Grid layout: table left, preview right */
.template-selector-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-6);
    align-items: start;
}

@media (max-width: 1024px) {
    .template-selector-grid {
        grid-template-columns: 1fr;
    }
}

/* Template Table */
.template-table-wrap {
    overflow-x: auto;
}

.template-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.template-table thead th {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--on-surface-variant);
    background: var(--surface-container-low);
    border-bottom: 2px solid var(--surface-container-highest);
    white-space: nowrap;
}

.template-table tbody td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--surface-container-high);
    vertical-align: middle;
}

.template-row {
    transition: background-color var(--duration-fast) var(--ease-out);
    cursor: default;
}

.template-row:hover {
    background-color: var(--primary-fixed) !important;
}

.template-code-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--surface-container);
    color: var(--on-surface);
    font-weight: 700;
    font-size: 0.8125rem;
    font-family: var(--font-display);
    border-radius: var(--radius-md);
    letter-spacing: 0.02em;
}

.template-row:hover .template-code-badge {
    background: var(--primary);
    color: var(--on-primary);
}

.template-part-cell {
    text-align: center;
    font-weight: 500;
    color: var(--on-surface-variant);
    min-width: 48px;
}

.template-total-cell {
    text-align: center;
    color: var(--on-surface);
}

.template-pages-cell {
    text-align: center;
}

/* Preview Panel (Sticky) */
.template-preview-panel {
    position: sticky;
    top: 100px;
}

.template-preview-card {
    transition: box-shadow var(--duration-base) var(--ease-out);
}

.template-preview-card.preview-active {
    box-shadow: var(--shadow-elevated);
}

.template-preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-12) var(--space-6);
    text-align: center;
    color: var(--on-surface-variant);
    font-size: 0.875rem;
    line-height: 1.5;
}

.template-preview-images {
    padding: var(--space-4);
}

.template-preview-label {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: var(--primary-fixed);
    border-radius: var(--radius-md);
    display: inline-block;
}

.template-preview-img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--surface-container-highest);
    margin-bottom: var(--space-3);
    transition: opacity var(--duration-base);
}

/* Selected Template Banner */
.template-selected-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    background: var(--primary-fixed);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    border: 1px solid var(--primary-fixed-dim);
}

.template-selected-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.9375rem;
    color: var(--on-primary-fixed);
}

.template-selected-info svg {
    color: var(--primary);
    flex-shrink: 0;
}


/* =============================================================================
   17. EXAM CONFIGURATOR — Sidebar + Answer Grid
   Build exam structure visually with per-question dropdowns.
   ============================================================================= */

/* Two-column layout */
.exam-configurator {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-6);
    align-items: start;
}

/* Sticky sidebar */
.exam-sidebar {
    position: sticky;
    top: 88px;
}

.exam-sidebar .card {
    padding: var(--space-5);
}

.sidebar-divider {
    height: 1px;
    background: var(--outline-variant);
    opacity: 0.3;
    margin: var(--space-5) 0;
}

/* ---------- Exam Step Bar (2-step tab switch) ---------- */
.exam-step-bar {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: var(--space-5);
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: 6px;
    position: sticky;
    top: 80px;
    z-index: 10;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 0 0 1px rgba(0,0,0,0.03);
}

.exam-step-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    background: transparent;
    color: var(--on-surface-variant);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.exam-step-tab:hover:not(.exam-step-tab--active) {
    background: color-mix(in srgb, var(--on-surface) 4%, transparent);
}

.exam-step-tab--active {
    background: var(--surface);
    color: var(--on-surface);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.04);
}

.exam-step-tab__num {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.875rem;
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    flex-shrink: 0;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 2px solid transparent;
}

.exam-step-tab__num--active {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 3px 12px color-mix(in srgb, var(--primary) 35%, transparent);
    border-color: color-mix(in srgb, var(--primary) 20%, transparent);
    transform: scale(1.05);
}

.exam-step-tab__num--done {
    background: var(--success);
    color: white;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--success) 25%, transparent);
    border-color: color-mix(in srgb, var(--success) 15%, transparent);
}

.exam-step-tab__text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    text-align: left;
}

.exam-step-tab__label {
    font-size: 0.8125rem;
    font-weight: 700;
    font-family: var(--font-display);
    line-height: 1.2;
}

.exam-step-tab__desc {
    font-size: 0.6875rem;
    font-weight: 500;
    opacity: 0.55;
    line-height: 1.2;
}

.exam-step-tab--active .exam-step-tab__desc {
    color: var(--primary);
    opacity: 0.75;
}

.exam-step-tab--done .exam-step-tab__label {
    color: var(--success);
}

.exam-step-tab--done .exam-step-tab__desc {
    color: var(--success);
    opacity: 0.6;
}

.exam-step-bar__divider {
    width: 40px;
    height: 3px;
    background: var(--surface-container-high);
    border-radius: 2px;
    flex-shrink: 0;
    margin: 0 2px;
    transition: background 0.4s, box-shadow 0.4s;
}

.exam-step-bar__divider--done {
    background: var(--success);
    box-shadow: 0 0 6px color-mix(in srgb, var(--success) 30%, transparent);
}

@media (max-width: 600px) {
    .exam-step-tab__text { display: none; }
    .exam-step-tab { padding: 10px 14px; }
    .exam-step-bar { padding: 4px; }
}

/* ---------- Part Configuration Blocks ---------- */

.part-config {
    margin-bottom: var(--space-5);
}

.part-config-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.part-config-label {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--on-surface);
}

.part-config-help {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 700;
    cursor: help;
    transition: background-color var(--duration-fast);
}

.part-config-help:hover {
    background: var(--primary-fixed);
    color: var(--primary);
}

.part-config-slider {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.part-config-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    min-width: 36px;
    text-align: right;
    line-height: 1;
}

/* ---------- Custom Range Slider ---------- */

.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--surface-container-high);
    outline: none;
    cursor: pointer;
    transition: background var(--duration-fast);
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(15, 118, 110, 0.35);
    border: 3px solid var(--surface-container-lowest);
    transition: transform var(--duration-fast) var(--ease-spring),
                box-shadow var(--duration-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 12px rgba(15, 118, 110, 0.45);
}

.range-slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.range-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--surface-container-lowest);
    box-shadow: 0 2px 8px rgba(15, 118, 110, 0.35);
}

/* Tertiary variant (orange) */
.range-slider-tertiary::-webkit-slider-thumb {
    background: var(--tertiary);
    box-shadow: 0 2px 8px rgba(143, 77, 0, 0.35);
}
.range-slider-tertiary::-moz-range-thumb {
    background: var(--tertiary);
    box-shadow: 0 2px 8px rgba(143, 77, 0, 0.35);
}

/* Success variant (green) */
.range-slider-success::-webkit-slider-thumb {
    background: var(--success);
    box-shadow: 0 2px 8px rgba(27, 122, 61, 0.35);
}
.range-slider-success::-moz-range-thumb {
    background: var(--success);
    box-shadow: 0 2px 8px rgba(27, 122, 61, 0.35);
}

/* ---------- Total Counter ---------- */

.total-counter {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.total-counter-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--on-surface-variant);
}

.total-counter-value {
    font-family: var(--font-display);
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--on-surface);
    line-height: 1;
    letter-spacing: -0.02em;
}

/* ---------- Variant Tabs ---------- */

.variant-tabs-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1.5px solid var(--border);
}

.variant-tabs {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}

.variant-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1.5px solid var(--outline-variant);
    border-radius: 99px;
    background: var(--surface-container);
    color: var(--on-surface);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.variant-tab:hover {
    border-color: var(--primary);
    background: var(--primary-container);
}

.variant-tab-active {
    border-color: var(--primary);
    background: var(--primary);
    color: var(--on-primary);
}

.variant-tab-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 0.75rem;
    line-height: 1;
    opacity: 0.6;
    transition: opacity 0.1s;
}

.variant-tab-remove:hover {
    opacity: 1;
    background: rgba(0,0,0,0.15);
}

.variant-tab-active .variant-tab-remove:hover {
    background: rgba(255,255,255,0.2);
}

/* ---------- Answer Area ---------- */

.exam-answer-area {
    min-width: 0;  /* prevent grid blowout */
}

/* Section wrapper */
.answer-section {
    margin-bottom: var(--space-8);
}

.answer-section:last-child {
    margin-bottom: 0;
}

.answer-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--outline-variant);
}

.answer-section-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--on-surface);
}

.answer-section-link {
    margin-left: auto;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--duration-fast);
}

.answer-section-link:hover {
    opacity: 1;
}

/* ---------- Answer Grid (5 cols) ---------- */

.answer-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-3);
}

.answer-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.answer-item-label {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    transition: color var(--duration-fast);
}

.answer-item-label.has-value {
    color: var(--primary);
}

/* Custom answer dropdown */
.answer-select {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    background-color: var(--surface-container-low);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--on-surface);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10' fill='none'%3E%3Cpath d='M2 3.5L5 6.5L8 3.5' stroke='%23727785' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
    transition: all var(--duration-fast) var(--ease-out);
    text-align: center;
    min-height: 40px;
}

.answer-select:hover {
    background-color: var(--surface-container);
}

.answer-select:focus {
    border-color: var(--primary);
    background-color: var(--primary-fixed);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.08);
}

.answer-select.has-value {
    background-color: var(--primary-fixed);
    color: var(--primary);
    border-color: rgba(15, 118, 110, 0.15);
}

/* ---------- True/False (Đúng/Sai) ---------- */

.tf-questions {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.tf-question-card {
    background: var(--surface-container-low);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    transition: box-shadow var(--duration-fast);
}

.tf-question-card:hover {
    box-shadow: var(--shadow-ambient);
}

.tf-question-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.tf-question-label {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--on-surface);
}

.tf-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
}

.tf-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.tf-option-letter {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    letter-spacing: 0.02em;
}

.tf-toggle {
    width: 100%;
    max-width: 56px;
    height: 36px;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    border: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-spring);
    cursor: pointer;
    user-select: none;
}

.tf-toggle:hover {
    transform: scale(1.05);
}

.tf-toggle:active {
    transform: scale(0.95);
}

.tf-toggle-d {
    background: var(--success-container);
    color: var(--on-success-container);
    border-color: rgba(27, 122, 61, 0.2);
}

.tf-toggle-s {
    background: var(--error-container);
    color: var(--on-error-container);
    border-color: rgba(186, 26, 26, 0.2);
}

/* ---------- Number Input (Điền số) ---------- */

.answer-input-number {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    background-color: var(--surface-container-low);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--on-surface);
    outline: none;
    text-align: center;
    min-height: 40px;
    transition: all var(--duration-fast) var(--ease-out);
}

.answer-input-number:hover {
    background-color: var(--surface-container);
}

.answer-input-number:focus {
    border-color: var(--primary);
    background-color: var(--primary-fixed);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.08);
}

.answer-input-number::placeholder {
    color: var(--outline);
    font-weight: 400;
    font-size: 0.8125rem;
}

/* ---------- Exam version label ---------- */

.exam-version-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--surface-container);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--on-surface-variant);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
    .exam-configurator {
        grid-template-columns: 1fr;
    }

    .exam-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .answer-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .tf-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .answer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


/* =============================================================================
   EXAM CARDS — Quản lý bài thi
   ============================================================================= */

.exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-5);
}

.exam-card {
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    transition: box-shadow var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
}

.exam-card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}

/* ── Header: Avatar + Title + Menu ── */
.exam-card__header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.exam-card__avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.8125rem;
    letter-spacing: 0.02em;
    flex-shrink: 0;
    background: var(--primary);
    color: var(--on-primary);
}

/* Subject-based avatar colors */
.exam-card__avatar[data-subject*="Toán"],
.exam-card__avatar[data-subject*="toán"],
.exam-card__avatar[data-subject*="Math"] {
    background: #2563eb;
}

.exam-card__avatar[data-subject*="Lý"],
.exam-card__avatar[data-subject*="lý"],
.exam-card__avatar[data-subject*="Physics"] {
    background: #7c3aed;
}

.exam-card__avatar[data-subject*="Hóa"],
.exam-card__avatar[data-subject*="hóa"],
.exam-card__avatar[data-subject*="Chemistry"] {
    background: #059669;
}

.exam-card__avatar[data-subject*="Sinh"],
.exam-card__avatar[data-subject*="sinh"],
.exam-card__avatar[data-subject*="Biology"] {
    background: #16a34a;
}

.exam-card__avatar[data-subject*="Anh"],
.exam-card__avatar[data-subject*="anh"],
.exam-card__avatar[data-subject*="English"] {
    background: #dc2626;
}

.exam-card__avatar[data-subject*="Sử"],
.exam-card__avatar[data-subject*="sử"],
.exam-card__avatar[data-subject*="History"] {
    background: #b45309;
}

.exam-card__avatar[data-subject*="Địa"],
.exam-card__avatar[data-subject*="địa"],
.exam-card__avatar[data-subject*="Geography"] {
    background: #0891b2;
}

.exam-card__avatar[data-subject*="Tin"],
.exam-card__avatar[data-subject*="tin"],
.exam-card__avatar[data-subject*="IT"] {
    background: #4f46e5;
}

.exam-card__title-group {
    flex: 1;
    min-width: 0;
}

.exam-card__title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--on-surface);
    line-height: 1.3;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.exam-card__subject {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    margin-top: 2px;
    display: block;
}

.exam-card__menu {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
    margin-left: auto;
}

.exam-card__menu-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--on-surface-variant);
    transition: all var(--duration-fast);
    background: transparent;
    border: none;
    cursor: pointer;
}

.exam-card__menu-btn:hover {
    background: var(--surface-container-high);
    color: var(--on-surface);
}

.exam-card__menu-btn--danger:hover {
    background: var(--error-container);
    color: var(--error);
}

/* ── Stats Row ── */
.exam-card__stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.exam-card__stat {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    background: var(--surface-container);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

.exam-card__stat-icon {
    color: var(--on-surface-variant);
    opacity: 0.7;
}

.exam-card__stat--accent {
    background: var(--primary-fixed);
    color: var(--primary);
}

.exam-card__stat--accent .exam-card__stat-icon {
    color: var(--primary);
    opacity: 1;
}

/* ── Variant code chips ── */
.exam-card__variants {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.exam-card__variant-chip {
    font-size: 0.6875rem;
    font-weight: 600;
    font-family: var(--font-display);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    letter-spacing: 0.02em;
}

/* ── Meta (timestamp) ── */
.exam-card__meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.6875rem;
    color: var(--on-surface-variant);
    opacity: 0.7;
}

/* ── Actions ── */
.exam-card__actions {
    display: flex;
    gap: var(--space-2);
    margin-top: auto;
    padding-top: var(--space-2);
    border-top: 1px solid var(--surface-container-high);
}

.exam-card__action-primary {
    flex: 1;
    justify-content: center;
}

.exam-card__action-secondary {
    flex: 1;
    justify-content: center;
}

/* ── Responsive ── */
@media (max-width: 720px) {
    .exam-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 400px) {
    .exam-card {
        padding: var(--space-4);
    }

    .exam-card__actions {
        flex-direction: column;
    }
}


/* =============================================================================
   EXAM IMPORT WIZARD
   ============================================================================= */

/* ── Step Indicator ── */
.import-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: var(--space-8);
    padding: var(--space-5) var(--space-4);
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    box-shadow: 0 1px 4px rgba(0,0,0,0.04), 0 0 0 1px rgba(0,0,0,0.03);
}

.import-step {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    transition: background var(--duration-base);
}

.import-step--active {
    background: color-mix(in srgb, var(--primary) 8%, transparent);
}

.import-step__num {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.9375rem;
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
    border: 2px solid transparent;
}

.import-step__text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.import-step__label {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--on-surface-variant);
    transition: color var(--duration-base);
    white-space: nowrap;
    font-family: var(--font-display);
    line-height: 1.2;
}

.import-step__desc {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    opacity: 0.6;
    white-space: nowrap;
    transition: color var(--duration-base);
}

.import-step--active .import-step__desc {
    color: var(--primary);
    opacity: 0.8;
}

.import-step--done .import-step__desc {
    color: var(--success);
    opacity: 0.7;
}

.import-step--active .import-step__num {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--primary) 35%, transparent);
    transform: scale(1.05);
    border-color: color-mix(in srgb, var(--primary) 25%, transparent);
}

.import-step--active .import-step__label {
    color: var(--on-surface);
}

.import-step--done .import-step__num {
    background: var(--success);
    color: white;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--success) 25%, transparent);
    border-color: color-mix(in srgb, var(--success) 20%, transparent);
}

.import-step--done .import-step__label {
    color: var(--success);
}

.import-step__line {
    width: 56px;
    height: 3px;
    background: var(--surface-container-high);
    margin: 0 var(--space-1);
    border-radius: 2px;
    transition: background 0.4s, box-shadow 0.4s;
    position: relative;
}

.import-step__line--done {
    background: var(--success);
    box-shadow: 0 0 6px color-mix(in srgb, var(--success) 30%, transparent);
}

/* ── Dropzone ── */
.import-dropzone-wrapper {
    max-width: 680px;
    margin: 0 auto;
}

.import-dropzone {
    border: 2px dashed var(--outline-variant);
    border-radius: var(--radius-xl);
    padding: var(--space-10) var(--space-6);
    text-align: center;
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    background: var(--surface-container-lowest);
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.import-dropzone:hover {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 3%, var(--surface-container-lowest));
}

.import-dropzone--hover {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 6%, var(--surface-container-lowest));
    border-style: solid;
    transform: scale(1.01);
}

.import-dropzone--error {
    border-color: var(--error);
    background: color-mix(in srgb, var(--error) 3%, var(--surface-container-lowest));
}

.import-dropzone__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.import-dropzone__icon {
    color: var(--on-surface-variant);
    opacity: 0.6;
    margin-bottom: var(--space-2);
}

.import-dropzone__icon--error {
    opacity: 1;
}

.import-dropzone__title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--on-surface);
}

.import-dropzone__subtitle {
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
}

.import-dropzone__formats {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.import-dropzone__format-badge {
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    font-family: var(--font-display);
}

.import-dropzone__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--surface-container-high);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.import-hint {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    background: var(--surface-container);
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
    line-height: 1.5;
}

/* ── Summary Stats ── */
.import-summary {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    flex-wrap: wrap;
}

.import-summary__stat {
    flex: 1;
    min-width: 100px;
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.import-summary__stat-value {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--on-surface);
}

.import-summary__stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    margin-top: 2px;
}

.import-summary__stat--total {
    background: var(--primary);
}

.import-summary__stat--total .import-summary__stat-value {
    color: var(--on-primary);
}

.import-summary__stat--total .import-summary__stat-label {
    color: var(--on-primary);
    opacity: 0.85;
}

/* ── Variant Tabs ── */
.import-variant-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.import-variant-tab {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font-display);
    background: var(--surface-container);
    color: var(--on-surface-variant);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--duration-fast);
}

.import-variant-tab:hover {
    background: var(--surface-container-high);
}

.import-variant-tab--active {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
}

/* ── Answer Preview ── */
.import-answers {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.import-answers__section {
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.import-answers__section-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.import-answers__section-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--on-surface);
}

.import-answers__grid {
    display: grid;
    gap: var(--space-2);
}

.import-answers__grid--p1 {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
}

.import-answers__grid--p3 {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
}

.import-answer-cell {
    background: var(--surface-container);
    border-radius: var(--radius-md);
    padding: 8px 10px;
    text-align: center;
}

.import-answer-cell__label {
    font-size: 0.625rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.import-answer-cell__value {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--primary);
}

.import-answer-cell__value--empty {
    color: var(--on-surface-variant);
    opacity: 0.4;
}

.import-answer-cell__value--num {
    font-size: 0.9375rem;
    color: var(--success);
}

/* ── P2 Cards ── */
.import-answers__p2-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-3);
}

.import-p2-card {
    background: var(--surface-container);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
}

.import-p2-card__header {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.8125rem;
    color: var(--on-surface);
    margin-bottom: var(--space-2);
}

.import-p2-card__opts {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.import-p2-opt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 4px;
    border-radius: var(--radius-md);
    background: var(--surface-container-lowest);
    transition: all var(--duration-fast);
}

.import-p2-opt__label {
    font-size: 0.625rem;
    font-weight: 500;
    color: var(--on-surface-variant);
}

.import-p2-opt__value {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
}

.import-p2-opt--dung {
    background: var(--success-container);
}

.import-p2-opt--dung .import-p2-opt__value {
    color: var(--on-success-container);
}

.import-p2-opt--sai {
    background: var(--error-container);
}

.import-p2-opt--sai .import-p2-opt__value {
    color: var(--on-error-container);
}

/* ── Template Picker Card ── */
.import-template-card {
    transition: all var(--duration-fast);
    border: 2px solid transparent;
}

.import-template-card:hover {
    box-shadow: var(--shadow-ambient);
    transform: translateY(-1px);
}

.import-template-card--selected {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 4%, var(--surface-container-lowest));
}

/* ── Button large ── */
.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .import-steps {
        gap: 0;
        padding: var(--space-3);
    }

    .import-step__text {
        display: none;
    }

    .import-step__line {
        width: 24px;
    }

    .import-step {
        padding: var(--space-1);
    }

    .import-summary {
        flex-wrap: wrap;
    }

    .import-summary__stat {
        min-width: 70px;
    }

    .import-answers__grid--p1 {
        grid-template-columns: repeat(4, 1fr);
    }

    .import-answers__p2-list {
        grid-template-columns: 1fr;
    }
}


/* =============================================================================
   TEMPLATE CARD GRID — Chọn mẫu phiếu có sẵn
   ============================================================================= */

/* ── Card Grid (3 columns on desktop) ── */
.tpl-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

/* ── Individual Card ── */
.tpl-card {
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    border: 1.5px solid var(--outline-variant);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
}

.tpl-card:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}

.tpl-card__header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.tpl-card__avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--primary);
    color: var(--on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tpl-card__title-group {
    flex: 1;
    min-width: 0;
}

.tpl-card__title {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--on-surface);
    margin: 0;
    line-height: 1.3;
}

.tpl-card__subtitle {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
    display: block;
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tpl-card__stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tpl-card__stat {
    display: inline-flex;
    align-items: center;
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    background: var(--surface-container);
    color: var(--on-surface-variant);
}

.tpl-card__stat--accent {
    background: var(--primary-fixed);
    color: var(--primary);
    font-weight: 700;
}

.tpl-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: var(--space-2);
    border-top: 1px solid var(--surface-container-high);
}

.tpl-card__action-hint {
    font-size: 0.6875rem;
    color: var(--primary);
    font-weight: 600;
}


/* ── Preview Modal ── */
.tpl-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    z-index: 99999;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.tpl-modal {
    background: var(--surface);
    border-radius: var(--radius-xl);
    max-width: 640px;
    width: calc(100% - var(--space-4) * 2);
    max-height: 85vh;
    max-height: 85dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    box-shadow: 0 24px 48px rgba(0,0,0,0.25);
    margin: auto;
}

.tpl-modal__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-5) var(--space-3);
}

.tpl-modal__title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--on-surface);
    margin: 0;
}

.tpl-modal__desc {
    margin: 2px 0 0;
}

.tpl-modal__close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--on-surface-variant);
    padding: 6px;
    border-radius: var(--radius-md);
    transition: background var(--duration-fast);
    flex-shrink: 0;
}

.tpl-modal__close:hover {
    background: var(--surface-container-high);
}

.tpl-modal__body {
    padding: 0 var(--space-5) var(--space-4);
}

.tpl-modal__stats {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.tpl-modal__stat-item {
    flex: 1;
    text-align: center;
    padding: var(--space-3);
    background: var(--surface-container);
    border-radius: var(--radius-lg);
}

.tpl-modal__stat-item--accent {
    background: var(--primary-fixed);
}

.tpl-modal__stat-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--on-surface-variant);
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.tpl-modal__stat-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--on-surface);
}

.tpl-modal__stat-item--accent .tpl-modal__stat-value {
    color: var(--primary);
}

.tpl-modal__preview {
    border-radius: var(--radius-lg);
    background: var(--surface-container-lowest);
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    min-height: 200px;
}

.tpl-modal__img {
    max-width: 100%;
    max-height: 400px;
    width: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.tpl-modal__no-img {
    padding: 40px 20px;
    text-align: center;
    color: var(--on-surface-variant);
    font-size: 0.8125rem;
}

.tpl-modal__footer {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5) var(--space-5);
    border-top: 1px solid var(--outline-variant);
}

.tpl-modal__btn {
    flex: 1;
    justify-content: center;
    text-decoration: none;
    white-space: nowrap;
}


/* ── Responsive ── */
@media (max-width: 1024px) {
    .tpl-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .tpl-card-grid {
        grid-template-columns: 1fr;
    }

    .tpl-card {
        padding: var(--space-4);
    }

    .tpl-modal-overlay {
        padding: var(--space-3);
        align-items: center;
    }

    .tpl-modal {
        width: calc(100% - var(--space-3) * 2);
        max-width: 100%;
        max-height: 90vh;
        max-height: 90dvh;
        margin: auto;
        border-radius: var(--radius-lg);
    }

    .tpl-modal__header {
        padding: var(--space-4) var(--space-4) var(--space-2);
    }

    .tpl-modal__body {
        padding: 0 var(--space-4) var(--space-3);
    }

    .tpl-modal__footer {
        flex-direction: column;
        padding: var(--space-3) var(--space-4) var(--space-4);
    }

    .tpl-modal__stats {
        flex-wrap: wrap;
    }

    .tpl-modal__stat-item {
        flex: 1 1 calc(50% - var(--space-2));
        min-width: 0;
    }

    .tpl-modal__img {
        max-height: 250px;
    }

    .tpl-modal__title {
        font-size: 1rem;
    }
}