/* ================================
   Segment Builder Styles
   ================================ */

.builder-container {
    max-width: 100%;
}

.builder-header {
    margin-bottom: 1.5rem;
}

.builder-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.builder-header h1 i {
    color: var(--primary-color);
}

.builder-header p {
    color: var(--text-secondary);
}

/* ================================
   Builder Layout (3 Panels)
   ================================ */
.builder-layout {
    display: grid;
    grid-template-columns: 320px 1fr 340px;
    gap: 1.5rem;
    min-height: calc(100vh - 280px);
}

/* ================================
   Attribute Panel (Left)
   ================================ */
.attribute-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-height: calc(100vh - 200px);  /* Constrain height to viewport */
}

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

.panel-header h3 {
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-header h3 i {
    color: var(--primary-color);
}

.search-box {
    position: relative;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.search-box i {
    position: absolute;
    left: 1.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.search-box input {
    width: 100%;
    padding: 0.625rem 0.875rem 0.625rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.category-filter {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.category-filter select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
}

.search-results {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
    min-height: 200px;  /* Ensure minimum visible area */
}

.search-results .hint {
    padding: 1rem;
    text-align: center;
}

.search-result-item {
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 0.25rem;
}

.search-result-item:hover {
    background: var(--bg-primary);
}

.search-result-item .result-name {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-result-item .result-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.search-result-item .result-size {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.popular-attributes {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.popular-attributes h4 {
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.quick-add-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.quick-add-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    cursor: pointer;
    transition: var(--transition);
}

.quick-add-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ================================
   Segment Panel (Center)
   ================================ */
.segment-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.logic-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.logic-toggle label {
    color: var(--text-secondary);
}

.logic-toggle select {
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
}

.criteria-list {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.empty-state p {
    margin-bottom: 0.25rem;
}

.criterion-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    position: relative;
}

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

.criterion-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.criterion-name {
    font-weight: 600;
    color: var(--text-primary);
}

.criterion-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.criterion-values {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.value-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    background: var(--primary-color);
    color: white;
    border-radius: 9999px;
    font-size: 0.75rem;
}

.value-tag .remove-value {
    cursor: pointer;
    opacity: 0.7;
}

.value-tag .remove-value:hover {
    opacity: 1;
}

/* Criterion card controls (edit + toggle + remove) */
.criterion-controls {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.criterion-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.25rem;
}

.criterion-remove:hover {
    color: var(--danger-color);
}

.criterion-edit {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.25rem;
    font-size: 0.75rem;
}

.criterion-edit:hover {
    color: var(--primary-color);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    border-radius: 20px;
    transition: 0.3s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(16px);
}

/* Disabled criterion card */
.criterion-card.disabled {
    opacity: 0.5;
    background: var(--bg-secondary);
}

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

.criterion-card.disabled .value-tag {
    background: var(--text-light);
}

/* Value logic indicator (OR/AND between value tags) */
.value-logic-indicator {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: 4px;
    text-transform: uppercase;
}

/* Card-level logic toggle (AND/OR for values within a criterion) */
.criterion-logic-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-color);
}

.criterion-logic-toggle .logic-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.logic-btn-group {
    display: flex;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.logic-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.65rem;
    font-weight: 600;
    background: var(--bg-secondary);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.logic-btn:first-child {
    border-right: 1px solid var(--border-color);
}

.logic-btn:hover {
    background: var(--border-color);
}

.logic-btn.active {
    background: var(--primary-color);
    color: white;
}

.criterion-card.disabled .criterion-logic-toggle {
    opacity: 0.5;
    pointer-events: none;
}

.criterion-size {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.segment-actions {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
}

/* ================================
   Results Panel (Right)
   ================================ */
.results-panel {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.estimate-display {
    padding: 1.5rem;
    text-align: center;
}

.estimate-main {
    margin-bottom: 1rem;
}

.estimate-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.estimate-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.estimate-details {
    display: flex;
    justify-content: space-around;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.detail-row {
    text-align: center;
}

.detail-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.detail-value {
    font-weight: 600;
    color: var(--text-primary);
}

.estimate-bar {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    margin-top: 1rem;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.breakdown-section,
.recommendations-section {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.breakdown-section h4,
.recommendations-section h4 {
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.recommendations-section h4 i {
    color: var(--warning-color);
}

.breakdown-list {
    font-size: 0.875rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--border-color);
}

.breakdown-item:last-child {
    border-bottom: none;
}

.recommendation-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.recommendation-item:hover {
    background: var(--border-color);
}

.recommendation-item .rec-label {
    font-weight: 500;
}

.recommendation-item .rec-lift {
    font-size: 0.75rem;
    color: var(--success-color);
}

/* ================================
   Value Selection Modal
   ================================ */
.value-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.value-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.value-option:hover {
    background: var(--border-color);
}

.value-option.selected {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid var(--primary-color);
}

.value-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.value-info {
    flex: 1;
}

.value-label {
    font-weight: 500;
}

.value-description {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

/* ================================
   Loading Modal
   ================================ */
.loading-modal {
    z-index: 2000;
}

.loading-modal .loading-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 2.5rem 3rem;
    text-align: center;
    min-width: 300px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.loading-spinner {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.loading-spinner i {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.95); }
}

.loading-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.loading-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 1200px) {
    .builder-layout {
        grid-template-columns: 1fr;
    }

    .attribute-panel,
    .results-panel {
        order: 2;
    }

    .segment-panel {
        order: 1;
    }
}