/* ============================================
   BUILDER.CSS - Form Builder Page
   ============================================ */

/* ---- Builder Layout ---- */
.builder-shell {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ---- Builder Sidebar (Field Palette) ---- */
.builder-palette {
    width: 280px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
}

.palette-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.palette-back {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
    background: none;
    border: none;
    text-decoration: none;
}

.palette-back:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

.palette-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.palette-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 10px 4px 6px;
}

.palette-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: grab;
    transition: all var(--transition-fast);
    user-select: none;
}

.palette-item:hover {
    border-color: var(--border-hover);
    background: var(--glass-hover);
    transform: translateX(3px);
}

.palette-item:active {
    cursor: grabbing;
}

.palette-item-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient-soft);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    flex-shrink: 0;
}

.palette-item-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.palette-item-desc {
    font-size: 11px;
    color: var(--text-muted);
}

/* ---- Builder Canvas ---- */
.builder-canvas {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-base);
    overflow: hidden;
}

/* ---- Builder Topbar ---- */
.builder-topbar {
    height: 60px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    flex-shrink: 0;
}

.builder-form-name {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
    outline: none;
    flex: 1;
    min-width: 0;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.builder-form-name:hover,
.builder-form-name:focus {
    background: var(--glass-bg);
}

.builder-topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.preview-toggle {
    display: flex;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 2px;
}

.preview-tab {
    padding: 6px 14px;
    border-radius: calc(var(--radius-md) - 2px);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: none;
    border: none;
}

.preview-tab.active {
    background: var(--bg-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-xs);
}

/* ---- Canvas Body ---- */
.canvas-body {
    flex: 1;
    overflow-y: auto;
    padding: 28px;
    display: flex;
    justify-content: center;
}

.canvas-form {
    width: 100%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ---- Form Header Card ---- */
.form-header-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.form-header-banner {
    height: 8px;
    background: var(--primary-gradient);
}

.form-header-content {
    padding: 24px;
}

.form-title-input {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 26px;
    font-weight: 800;
    outline: none;
    letter-spacing: -0.03em;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

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

.form-title-input::placeholder {
    color: var(--text-muted);
}

.form-desc-input {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    outline: none;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-fast);
    resize: none;
    min-height: 36px;
    margin-top: 8px;
}

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

.form-desc-input::placeholder {
    color: var(--text-muted);
}

/* ---- Field Card ---- */
.field-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: default;
    position: relative;
}

.field-card:hover {
    border-color: var(--border-hover);
}

.field-card.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.field-card-handle {
    position: absolute;
    left: -1px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 40px;
    background: var(--primary);
    border-radius: 0 4px 4px 0;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.field-card.selected .field-card-handle {
    opacity: 1;
}

.field-card-header {
    display: flex;
    align-items: center;
    padding: 14px 18px 8px;
    gap: 10px;
}

.field-card-drag {
    color: var(--text-muted);
    cursor: grab;
    transition: color var(--transition-fast);
}

.field-card-drag:hover {
    color: var(--text-secondary);
}

.field-card-drag:active {
    cursor: grabbing;
}

.field-card-type {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--primary-light);
    background: var(--primary-gradient-soft);
    padding: 3px 8px;
    border-radius: var(--radius-full);
}

.field-card-actions {
    margin-left: auto;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.field-card:hover .field-card-actions {
    opacity: 1;
}

.field-card.selected .field-card-actions {
    opacity: 1;
}

.field-card-body {
    padding: 0 18px 18px;
}

.field-label-input {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    outline: none;
    padding: 4px 0;
    border-bottom: 1.5px solid transparent;
    transition: border-color var(--transition-fast);
    margin-bottom: 10px;
}

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

.field-preview {
    pointer-events: none;
}

.field-preview .form-input {
    background: var(--bg-input);
    opacity: 0.7;
}

/* ---- Choices editor ---- */
.choice-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.choice-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.choice-bullet {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-hover);
    border-radius: 3px;
    flex-shrink: 0;
}

.choice-bullet.radio {
    border-radius: 50%;
}

.choice-input {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 14px;
    outline: none;
    padding: 4px 0;
    transition: border-color var(--transition-fast);
}

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

.choice-remove {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    opacity: 0;
    transition: all var(--transition-fast);
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.choice-item:hover .choice-remove {
    opacity: 1;
}

.choice-remove:hover {
    color: var(--danger);
    background: var(--danger-bg);
}

.add-choice-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--primary-light);
    padding: 6px 0;
    cursor: pointer;
    background: none;
    border: none;
    margin-top: 4px;
}

.add-choice-btn:hover {
    color: var(--primary);
}

/* ---- Drop Zone ---- */
.drop-zone {
    height: 60px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--text-muted);
    gap: 8px;
    transition: all var(--transition-base);
    opacity: 0;
    pointer-events: none;
}

.drop-zone.visible {
    opacity: 1;
    pointer-events: all;
}

.drop-zone.active {
    border-color: var(--primary);
    background: var(--primary-gradient-soft);
    color: var(--primary-light);
}

/* ---- Add field button ---- */
.add-field-btn {
    height: 56px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-base);
    background: none;
    width: 100%;
}

.add-field-btn:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--primary-gradient-soft);
}

/* ---- Right Settings Panel ---- */
.field-settings {
    width: 280px;
    background: var(--bg-sidebar);
    border-left: 1px solid var(--border);
    overflow-y: auto;
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.settings-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.settings-group-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ---- Share Modal ---- */
.share-url-container {
    display: flex;
    gap: 8px;
}

.share-url-input {
    flex: 1;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-input);
}

/* ---- Preview Mode ---- */
.preview-mode .field-card {
    cursor: not-allowed;
    pointer-events: none;
}

.preview-mode .field-preview {
    pointer-events: all;
}

.preview-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: var(--shadow-lg);
}

/* ---- Scale Dots (Rating) ---- */
.rating-preview {
    display: flex;
    gap: 8px;
}

.rating-dot {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
    .field-settings {
        position: fixed;
        right: 0;
        top: 0;
        bottom: 0;
        z-index: 2000;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .field-settings.mobile-open {
        transform: translateX(0);
    }
}

@media (max-width: 768px) {
    .builder-palette {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 2000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .builder-palette.mobile-open {
        transform: translateX(0);
    }

    .canvas-body {
        padding: 16px;
    }

    .builder-topbar-actions {
        gap: 8px;
    }

    .builder-form-name {
        font-size: 14px;
        padding: 4px;
    }

    .mobile-palette-toggle,
    .mobile-settings-toggle {
        display: flex !important;
    }
}

/* ======================================================
   QUIZ BUILDER ADDITIONS
   ====================================================== */

/* ── Quiz Settings Bar (under topbar) ── */
.quiz-settings-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 8px 24px;
    background: rgba(245, 158, 11, .06);
    border-bottom: 1px solid rgba(245, 158, 11, .25);
    font-size: 12px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.quiz-mode-label {
    font-weight: 800;
    color: #f59e0b;
    font-size: 12px;
    letter-spacing: .04em;
}

/* ── Canvas Field (new style from JS) ── */
.canvas-field {
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: flex-start;
    gap: 0;
    position: relative;
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s, transform .15s;
    animation: card-appear .25s ease;
}

.canvas-field:hover {
    border-color: var(--border-hover);
}

.canvas-field.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.canvas-field.quiz-question {
    border-left: 3px solid rgba(245, 158, 11, .5);
}

.canvas-field.quiz-question.selected {
    border-color: var(--primary);
}

.canvas-field.drop-target {
    border-color: var(--primary);
    background: var(--primary-gradient-soft);
}

.canvas-field.removing {
    animation: fade-out .3s ease forwards;
}

.canvas-field.dragging-field {
    opacity: .4;
}

.drop-target-canvas {
    outline: 2px dashed var(--primary);
    outline-offset: 4px;
    border-radius: var(--radius-lg);
}

/* ── Drag Handle ── */
.field-drag-handle {
    padding: 16px 10px 16px 14px;
    color: var(--text-muted);
    cursor: grab;
    font-size: 14px;
    user-select: none;
    flex-shrink: 0;
    letter-spacing: .05em;
    opacity: 0;
    transition: opacity .15s;
}

.canvas-field:hover .field-drag-handle {
    opacity: 1;
}

.field-drag-handle:active {
    cursor: grabbing;
}

/* ── Field Card Body ── */
.field-card-body {
    flex: 1;
    padding: 14px 12px 14px 0;
    min-width: 0;
}

.field-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

/* ── Badges ── */
.field-type-badge {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--primary-light);
    background: var(--primary-gradient-soft);
    border: 1px solid rgba(79, 70, 229, .2);
    padding: 2px 7px;
    border-radius: var(--radius-full);
}

.quiz-points-badge {
    font-size: 10px;
    font-weight: 700;
    color: #f59e0b;
    background: rgba(245, 158, 11, .12);
    border: 1px solid rgba(245, 158, 11, .25);
    padding: 2px 7px;
    border-radius: var(--radius-full);
}

.required-badge {
    font-size: 10px;
    font-weight: 700;
    color: var(--danger);
    background: var(--danger-bg);
    padding: 2px 7px;
    border-radius: var(--radius-full);
}

/* ── Inline Label ── */
.field-label-inline {
    display: block;
    width: 100%;
    background: none;
    border: none;
    outline: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0 0 8px;
    border-bottom: 1.5px solid transparent;
    transition: border-color .15s;
    margin-bottom: 10px;
}

.field-label-inline:focus {
    border-bottom-color: var(--primary);
}

.field-label-inline::placeholder {
    color: var(--text-muted);
    font-weight: 500;
}

.section-label {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-field {
    background: var(--bg-elevated);
    border: 1px dashed var(--border);
}

.field-section-line {
    flex: 1;
    padding: 14px 12px 12px 0;
}

.section-hr {
    border: none;
    border-top: 2px solid var(--border);
    margin-top: 6px;
}

/* ── Field Preview ── */
.field-preview {
    pointer-events: none;
}

.preview-input {
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 9px 13px;
    font-size: 13px;
    color: var(--text-muted);
    background: var(--bg-input);
}

.preview-textarea {
    min-height: 72px;
}

.preview-select {
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    padding: 9px 13px;
    font-size: 13px;
    color: var(--text-muted);
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.preview-choice {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
    padding: 6px 0;
}

.preview-radio {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-hover);
    border-radius: 50%;
    flex-shrink: 0;
}

.preview-check {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-hover);
    border-radius: 3px;
    flex-shrink: 0;
}

.preview-star {
    width: 38px;
    height: 38px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-muted);
}

.preview-upload {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* ── Correct Answer Hint (in canvas) ── */
.correct-answer-hint {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    color: var(--success);
    background: rgba(16, 185, 129, .08);
    border: 1px solid rgba(16, 185, 129, .2);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    margin-top: 8px;
    width: fit-content;
}

/* ── Field Action Buttons ── */
.field-card-actions {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px 10px 10px 0;
    opacity: 0;
    transition: opacity .15s;
    flex-shrink: 0;
}

.canvas-field:hover .field-card-actions,
.canvas-field.selected .field-card-actions {
    opacity: 1;
}

.field-action-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all .15s;
}

.field-action-btn:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
}

.field-action-btn.field-delete-btn:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ── Canvas Empty ── */
.canvas-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px;
    text-align: center;
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    gap: 12px;
    color: var(--text-muted);
}

.canvas-empty-icon {
    margin-bottom: 4px;
}

.canvas-empty h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-secondary);
}

.canvas-empty p {
    font-size: 13px;
    line-height: 1.6;
    max-width: 260px;
}

/* ── Settings Panel ── */
.settings-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.settings-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
}

.settings-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: 4px;
}

.settings-input {
    font-size: 13px;
    padding: 8px 10px;
}

.settings-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 4px 0;
}

.choice-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.choice-row .form-input {
    flex: 1;
}

/* ── Fade out animation ── */
@keyframes fade-out {
    to {
        opacity: 0;
        transform: scale(.92);
    }
}

/* ── Preview mode pointer events ── */
.preview-mode .canvas-field {
    cursor: default;
    pointer-events: none;
}