/* ==========================================================================
   VIUCraft URL Builder Styles
   Uses design tokens from variables.css
   ========================================================================== */

/* ---------- Full-width override for docs layout ---------- */
.url-builder-full-width {
    max-width: 100% !important;
    width: 100%;
}

.url-builder-full-width ~ .docs-toc {
    display: none;
}

/* When builder is active, expand the docs container */
.docs-container:has(.url-builder-full-width) {
    max-width: 100%;
    padding-left: var(--space-16);
    padding-right: var(--space-16);
    padding-bottom: 0;
}

/* ---------- Builder container ---------- */
.url-builder {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 500px;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-md);
    background: #fff;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
}

/* ---------- Toolbar ---------- */
.url-builder-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-8) var(--space-16);
    background: var(--neutral-50);
    border-bottom: 1px solid var(--neutral-200);
    flex-shrink: 0;
}

.url-builder-toolbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-16);
}

.url-builder-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--neutral-900);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-title i {
    color: var(--primary-purple);
    font-size: var(--font-size-sm);
}

/* ---------- Breadcrumb ---------- */
.url-builder-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
}

.url-builder-breadcrumb a {
    color: var(--neutral-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.url-builder-breadcrumb a:hover {
    color: var(--primary-purple);
}

.url-builder-breadcrumb-sep {
    color: var(--neutral-300);
    user-select: none;
}

/* ---------- Toolbar buttons ---------- */
.url-builder-toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.url-builder-toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-600);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.url-builder-toolbar-btn:hover:not(:disabled) {
    color: var(--neutral-900);
    background: var(--neutral-100);
    border-color: var(--neutral-200);
}

.url-builder-toolbar-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.url-builder-toolbar-btn-reset {
    color: var(--danger);
}

.url-builder-toolbar-btn-reset:hover:not(:disabled) {
    color: #fff;
    background: var(--danger);
    border-color: var(--danger);
}

/* ---------- Split-screen panel layout ---------- */
.url-builder-panels {
    display: grid;
    grid-template-columns: 2fr 6px 3fr;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.url-builder-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

/* ---------- Controls panel (left) ---------- */
.url-builder-panel-controls {
    border-right: none;
}

.url-builder-panel-scroll {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-16);
}

/* Custom scrollbar for controls panel */
.url-builder-panel-scroll::-webkit-scrollbar {
    width: 6px;
}

.url-builder-panel-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.url-builder-panel-scroll::-webkit-scrollbar-thumb {
    background: var(--neutral-200);
    border-radius: 3px;
}

.url-builder-panel-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--neutral-300);
}

/* ---------- Sections ---------- */
.url-builder-section {
    margin-bottom: var(--space-16);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

.url-builder-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-8) var(--space-12);
    background: var(--neutral-50);
    border-bottom: 1px solid var(--neutral-200);
}

.url-builder-section-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--neutral-700);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-section-title i {
    color: var(--neutral-400);
    font-size: 0.8em;
    width: 16px;
    text-align: center;
}

.url-builder-section-body {
    padding: var(--space-12);
}

/* ---------- Placeholder / empty states ---------- */
.url-builder-placeholder {
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.url-builder-placeholder-text {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    font-size: var(--font-size-sm);
    color: var(--neutral-400);
    font-style: italic;
    margin: 0;
}

.url-builder-placeholder-text i {
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

/* ---------- Operation stack ---------- */
.url-builder-op-stack {
    min-height: 80px;
}

/* ---------- Add Operation button ---------- */
.url-builder-add-op-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-12);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: #fff;
    background: var(--primary-purple);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.url-builder-add-op-btn:hover:not(:disabled) {
    background: #5f4fd6;
    box-shadow: 0 2px 8px rgba(113, 97, 239, 0.3);
}

.url-builder-add-op-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
}

.url-builder-add-op-btn i {
    font-size: 0.75em;
}

/* ---------- Format selector ---------- */
.url-builder-format-selector {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.url-builder-format-btns {
    display: flex;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.url-builder-format-btn {
    flex: 1;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    background: #fff;
    border: none;
    border-right: 1px solid var(--neutral-200);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.url-builder-format-btn:last-child {
    border-right: none;
}

.url-builder-format-btn:hover:not(.active) {
    background: var(--neutral-50);
    color: var(--neutral-900);
}

.url-builder-format-btn.active {
    background: var(--primary-purple);
    color: #fff;
}

/* ---------- Generated URL output ---------- */
.url-builder-url-output {
    min-height: 48px;
    display: flex;
    align-items: center;
}

.url-builder-url-output code {
    display: block;
    width: 100%;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--neutral-800);
    background: var(--neutral-50);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    word-break: break-all;
    line-height: 1.5;
}

.url-builder-url-output-actions {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.url-builder-url-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-600);
    background: transparent;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.url-builder-url-copy-btn:hover {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    background: rgba(113, 97, 239, 0.05);
}

/* ---------- Resize handle ---------- */
.url-builder-resize-handle {
    width: 6px;
    background: var(--neutral-100);
    cursor: col-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
    position: relative;
    z-index: 10;
    flex-shrink: 0;
}

.url-builder-resize-handle:hover,
.url-builder-resize-handle.is-dragging {
    background: var(--primary-purple);
}

.url-builder-resize-handle-grip {
    width: 2px;
    height: 24px;
    border-radius: 1px;
    background: var(--neutral-300);
    transition: background var(--transition-fast);
}

.url-builder-resize-handle:hover .url-builder-resize-handle-grip,
.url-builder-resize-handle.is-dragging .url-builder-resize-handle-grip {
    background: rgba(255, 255, 255, 0.6);
}

/* ---------- Preview panel (right) ---------- */
.url-builder-panel-preview {
    position: relative;
    display: flex;
    flex-direction: column;
}

/* ---------- Viewport toggle bar ---------- */
.url-builder-viewport-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-8) var(--space-12);
    background: var(--neutral-50);
    border-bottom: 1px solid var(--neutral-200);
    flex-shrink: 0;
}

.url-builder-viewport-toggles {
    display: flex;
    gap: var(--space-2);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.url-builder-viewport-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 32px;
    background: #fff;
    border: none;
    border-right: 1px solid var(--neutral-200);
    color: var(--neutral-500);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.url-builder-viewport-btn:last-child {
    border-right: none;
}

.url-builder-viewport-btn:hover:not(.active) {
    background: var(--neutral-50);
    color: var(--neutral-700);
}

.url-builder-viewport-btn.active {
    background: var(--primary-purple);
    color: #fff;
}

.url-builder-viewport-info {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-viewport-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-500);
}

/* ---------- Preview area ---------- */
.url-builder-preview-area {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: stretch;
    justify-content: center;
    padding: var(--space-16);
    /* Checkered transparency background */
    background-image:
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
    background-color: #fafafa;
}

.url-builder-preview-viewport {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 300px;
    position: relative;
    transition: max-width 0.3s ease;
}

/* ---------- Preview empty state ---------- */
.url-builder-preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-48) var(--space-24);
    color: var(--neutral-400);
}

.url-builder-preview-empty-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neutral-100);
    border-radius: 50%;
    margin-bottom: var(--space-16);
}

.url-builder-preview-empty-icon i {
    font-size: 2rem;
    color: var(--neutral-400);
}

.url-builder-preview-empty h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--neutral-600);
    margin: 0 0 var(--space-8);
}

.url-builder-preview-empty p {
    font-size: var(--font-size-sm);
    color: var(--neutral-400);
    margin: 0;
    max-width: 360px;
    line-height: 1.5;
}

/* ---------- Preview image ---------- */
.url-builder-preview-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 2px;
    box-shadow: var(--shadow-md);
}

/* ---------- Preview loading overlay ---------- */
.url-builder-preview-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-12);
    z-index: 20;
    backdrop-filter: blur(2px);
}

.url-builder-preview-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--neutral-200);
    border-top-color: var(--primary-purple);
    border-radius: 50%;
    animation: url-builder-spin 0.8s linear infinite;
}

@keyframes url-builder-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.url-builder-preview-loading span {
    font-size: var(--font-size-sm);
    color: var(--neutral-500);
    font-weight: 500;
}

/* ---------- Preview error state ---------- */
.url-builder-preview-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-48) var(--space-24);
}

.url-builder-preview-error-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 86, 48, 0.1);
    border-radius: 50%;
    margin-bottom: var(--space-16);
}

.url-builder-preview-error-icon i {
    font-size: 1.5rem;
    color: var(--danger);
}

.url-builder-preview-error h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--neutral-800);
    margin: 0 0 var(--space-8);
}

.url-builder-preview-error p {
    font-size: var(--font-size-sm);
    color: var(--neutral-500);
    margin: 0 0 var(--space-16);
    max-width: 360px;
    line-height: 1.5;
}

.url-builder-preview-retry-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #fff;
    background: var(--primary-purple);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.url-builder-preview-retry-btn:hover {
    background: #5f4fd6;
    box-shadow: 0 2px 8px rgba(113, 97, 239, 0.3);
}

/* ---------- Size comparison bar ---------- */
.url-builder-size-bar {
    display: flex;
    align-items: center;
    gap: var(--space-24);
    padding: var(--space-8) var(--space-16);
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-200);
    flex-shrink: 0;
}

.url-builder-size-item {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-size-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-400);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.url-builder-size-value {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.url-builder-size-savings {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--success);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* ---------- No-JS fallback ---------- */
.url-builder-nojs {
    padding: var(--space-48) var(--space-24);
    text-align: center;
    background: var(--neutral-50);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-md);
}

.url-builder-nojs p {
    font-size: var(--font-size-base);
    color: var(--neutral-600);
    margin: 0;
}


/* ==========================================================================
   Dark Mode
   ========================================================================== */

[data-theme="dark"] .url-builder {
    background: #1a1a2e;
    border-color: #2a2a3e;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .url-builder-toolbar {
    background: #13132b;
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-title {
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-breadcrumb {
    color: #52567a;
}

[data-theme="dark"] .url-builder-breadcrumb a {
    color: #71717a;
}

[data-theme="dark"] .url-builder-breadcrumb a:hover {
    color: #a78bfa;
}

[data-theme="dark"] .url-builder-breadcrumb-sep {
    color: #3a3a4e;
}

[data-theme="dark"] .url-builder-toolbar-btn {
    color: #71717a;
}

[data-theme="dark"] .url-builder-toolbar-btn:hover:not(:disabled) {
    color: #e4e4e7;
    background: #2a2a3e;
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-toolbar-btn-reset:hover:not(:disabled) {
    color: #fff;
    background: var(--danger);
    border-color: var(--danger);
}

[data-theme="dark"] .url-builder-section {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-section-header {
    background: #13132b;
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-section-title {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-section-title i {
    color: #52567a;
}

[data-theme="dark"] .url-builder-section-body {
    background: #1a1a2e;
}

[data-theme="dark"] .url-builder-placeholder-text {
    color: #52567a;
}

[data-theme="dark"] .url-builder-add-op-btn {
    background: #7161ef;
}

[data-theme="dark"] .url-builder-add-op-btn:hover:not(:disabled) {
    background: #5f4fd6;
}

/* Format selector dark mode */
[data-theme="dark"] .url-builder-format-btns {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-format-btn {
    background: #1a1a2e;
    color: #71717a;
    border-right-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-format-btn:hover:not(.active) {
    background: #2a2a3e;
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-format-btn.active {
    background: #7161ef;
    color: #fff;
}

/* Generated URL dark mode */
[data-theme="dark"] .url-builder-url-output code {
    background: #0f0f23;
    border-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-url-copy-btn {
    color: #71717a;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-url-copy-btn:hover {
    color: #a78bfa;
    border-color: #7161ef;
    background: rgba(113, 97, 239, 0.1);
}

/* Resize handle dark mode */
[data-theme="dark"] .url-builder-resize-handle {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-resize-handle-grip {
    background: #3a3a4e;
}

/* Viewport bar dark mode */
[data-theme="dark"] .url-builder-viewport-bar {
    background: #13132b;
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-viewport-toggles {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-viewport-btn {
    background: #1a1a2e;
    color: #52567a;
    border-right-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-viewport-btn:hover:not(.active) {
    background: #2a2a3e;
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-viewport-btn.active {
    background: #7161ef;
    color: #fff;
}

[data-theme="dark"] .url-builder-viewport-label {
    color: #52567a;
}

/* Preview area dark mode */
[data-theme="dark"] .url-builder-preview-area {
    background-image:
        linear-gradient(45deg, #1a1a2e 25%, transparent 25%),
        linear-gradient(-45deg, #1a1a2e 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1a1a2e 75%),
        linear-gradient(-45deg, transparent 75%, #1a1a2e 75%);
    background-color: #0f0f23;
}

[data-theme="dark"] .url-builder-preview-empty {
    color: #52567a;
}

[data-theme="dark"] .url-builder-preview-empty-icon {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-preview-empty-icon i {
    color: #52567a;
}

[data-theme="dark"] .url-builder-preview-empty h4 {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-preview-empty p {
    color: #52567a;
}

/* Preview loading dark mode */
[data-theme="dark"] .url-builder-preview-loading {
    background: rgba(26, 26, 46, 0.9);
}

[data-theme="dark"] .url-builder-preview-spinner {
    border-color: #2a2a3e;
    border-top-color: #a78bfa;
}

[data-theme="dark"] .url-builder-preview-loading span {
    color: #71717a;
}

/* Preview error dark mode */
[data-theme="dark"] .url-builder-preview-error-icon {
    background: rgba(255, 86, 48, 0.15);
}

[data-theme="dark"] .url-builder-preview-error h4 {
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-preview-error p {
    color: #71717a;
}

[data-theme="dark"] .url-builder-preview-retry-btn {
    background: #7161ef;
}

[data-theme="dark"] .url-builder-preview-retry-btn:hover {
    background: #5f4fd6;
}

/* Size bar dark mode */
[data-theme="dark"] .url-builder-size-bar {
    background: #13132b;
    border-top-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-size-label {
    color: #52567a;
}

[data-theme="dark"] .url-builder-size-value {
    color: #a1a1aa;
}

/* Scrollbar dark mode */
[data-theme="dark"] .url-builder-panel-scroll::-webkit-scrollbar-thumb {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-panel-scroll::-webkit-scrollbar-thumb:hover {
    background: #3a3a4e;
}

/* No-JS dark mode */
[data-theme="dark"] .url-builder-nojs {
    background: #1a1a2e;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-nojs p {
    color: #a1a1aa;
}


/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
    .url-builder {
        height: auto;
        min-height: auto;
    }

    .url-builder-panels {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }

    .url-builder-resize-handle {
        width: 100%;
        height: 6px;
        cursor: row-resize;
    }

    .url-builder-resize-handle-grip {
        width: 24px;
        height: 2px;
    }

    .url-builder-panel-controls {
        border-right: none;
        border-bottom: none;
    }

    .url-builder-panel-preview {
        min-height: 400px;
    }

    .url-builder-preview-viewport {
        min-height: 250px;
    }
}

@media (max-width: 767px) {
    .url-builder-toolbar {
        flex-wrap: wrap;
        gap: var(--space-8);
    }

    .url-builder-toolbar-left {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }

    .url-builder-toolbar-btn-label {
        display: none;
    }

    .url-builder-panel-preview {
        min-height: 300px;
    }

    .url-builder-size-bar {
        flex-wrap: wrap;
        gap: var(--space-12);
    }

    .url-builder-viewport-bar {
        flex-wrap: wrap;
        gap: var(--space-8);
    }
}

@media (max-width: 480px) {
    .url-builder-breadcrumb {
        display: none;
    }

    .url-builder-format-btns {
        flex-wrap: wrap;
    }

    .url-builder-format-btn {
        flex: 1 1 45%;
        border-bottom: 1px solid var(--neutral-200);
    }

    [data-theme="dark"] .url-builder-format-btn {
        border-bottom-color: #2a2a3e;
    }
}


/* ==========================================================================
   Print
   ========================================================================== */

@media print {
    .url-builder-toolbar {
        display: none;
    }

    .url-builder-resize-handle {
        display: none;
    }

    .url-builder-viewport-bar {
        display: none;
    }

    .url-builder-panels {
        display: block;
    }

    .url-builder-panel-controls {
        page-break-after: always;
    }

    .url-builder {
        height: auto;
        border: none;
        box-shadow: none;
    }

    .url-builder-preview-area {
        background: none;
    }
}


/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .url-builder-preview-spinner {
        animation: none;
        border-top-color: var(--primary-purple);
        opacity: 0.6;
    }

    .url-builder-resize-handle,
    .url-builder-resize-handle-grip,
    .url-builder-toolbar-btn,
    .url-builder-format-btn,
    .url-builder-viewport-btn,
    .url-builder-preview-retry-btn,
    .url-builder-add-op-btn,
    .url-builder-breadcrumb a,
    .url-builder-url-copy-btn {
        transition: none;
    }

    .url-builder-preview-viewport {
        transition: none;
    }
}


/* ==========================================================================
   Focus / Accessibility
   ========================================================================== */

.url-builder-toolbar-btn:focus-visible,
.url-builder-format-btn:focus-visible,
.url-builder-viewport-btn:focus-visible,
.url-builder-add-op-btn:focus-visible,
.url-builder-preview-retry-btn:focus-visible,
.url-builder-url-copy-btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-breadcrumb a:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ==========================================================================
   Share & State Persistence (E23-S06)
   ========================================================================== */

/* ---------- Share tooltip ---------- */
.url-builder-share-tooltip {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--neutral-900);
    color: #fff;
    font-size: var(--font-size-xs);
    font-weight: 500;
    padding: var(--space-8) var(--space-12);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 50;
    box-shadow: var(--shadow-md);
    animation: url-builder-tooltip-in 0.15s ease-out;
    pointer-events: none;
}

.url-builder-share-tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    right: 12px;
    border: 6px solid transparent;
    border-bottom-color: var(--neutral-900);
}

.url-builder-share-tooltip-warning {
    display: block;
    margin-top: var(--space-4);
    font-size: 0.7rem;
    color: #fbbf24;
    font-weight: 400;
}

@keyframes url-builder-tooltip-in {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Shared link notice ---------- */
.url-builder-shared-notice {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-12);
    margin-bottom: var(--space-12);
    font-size: var(--font-size-xs);
    color: var(--primary-purple);
    background: rgba(113, 97, 239, 0.08);
    border: 1px solid rgba(113, 97, 239, 0.2);
    border-radius: var(--radius-sm);
}

.url-builder-shared-notice i {
    flex-shrink: 0;
}

/* ---------- Private image notice ---------- */
.url-builder-private-notice {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-24);
    text-align: center;
    color: var(--neutral-500);
}

.url-builder-private-notice i {
    font-size: 2rem;
    color: var(--neutral-300);
}

.url-builder-private-notice p {
    margin: 0;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* ---------- Dark mode ---------- */
[data-theme="dark"] .url-builder-share-tooltip {
    background: #e4e4e7;
    color: #0f0f23;
}

[data-theme="dark"] .url-builder-share-tooltip::before {
    border-bottom-color: #e4e4e7;
}

[data-theme="dark"] .url-builder-share-tooltip-warning {
    color: #d97706;
}

[data-theme="dark"] .url-builder-shared-notice {
    color: #a78bfa;
    background: rgba(113, 97, 239, 0.12);
    border-color: rgba(113, 97, 239, 0.25);
}

[data-theme="dark"] .url-builder-private-notice {
    color: #71717a;
}

[data-theme="dark"] .url-builder-private-notice i {
    color: #3a3a4e;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .url-builder-share-tooltip {
        animation: none;
    }
}


/* ==========================================================================
   Image Selector & Operation Stack (E23-S02)
   ========================================================================== */

/* ---------- Screen reader only ---------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- Image source tabs ---------- */
.url-builder-img-tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-12);
    border-bottom: 1px solid var(--neutral-200);
}

.url-builder-img-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--neutral-500);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.url-builder-img-tab:hover:not(.active) {
    color: var(--neutral-700);
    background: var(--neutral-50);
}

.url-builder-img-tab.active {
    color: var(--primary-purple);
    border-bottom-color: var(--primary-purple);
}

.url-builder-img-tab i {
    font-size: 0.85em;
}

/* ---------- Tab panes ---------- */
.url-builder-img-tab-pane {
    padding-top: var(--space-4);
}

/* ---------- Form field styles ---------- */
.url-builder-field {
    margin-bottom: var(--space-8);
}

.url-builder-field:last-child {
    margin-bottom: 0;
}

.url-builder-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.url-builder-input-group {
    display: flex;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.url-builder-input-group:focus-within {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

.url-builder-input {
    flex: 1;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
    color: var(--neutral-800);
    background: #fff;
    border: none;
    outline: none;
    min-width: 0;
    font-family: inherit;
}

.url-builder-input::placeholder {
    color: var(--neutral-400);
}

.url-builder-input-addon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    background: var(--neutral-50);
    border: none;
    border-left: 1px solid var(--neutral-200);
    color: var(--neutral-500);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.url-builder-input-addon:hover {
    background: var(--primary-purple);
    color: #fff;
    border-left-color: var(--primary-purple);
}

.url-builder-input-error {
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(255, 86, 48, 0.15) !important;
}

/* ---------- URL preview ---------- */
.url-builder-img-url-preview {
    margin-top: var(--space-8);
}

.url-builder-img-url-preview-inner {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8);
    background: var(--neutral-50);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
}

.url-builder-img-url-preview-thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.url-builder-img-url-preview-placeholder {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neutral-100);
    border-radius: var(--radius-sm);
    color: var(--neutral-400);
    flex-shrink: 0;
}

.url-builder-img-url-preview-info {
    font-size: var(--font-size-xs);
    color: var(--neutral-500);
}

/* ---------- Image grid ---------- */
.url-builder-img-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    min-height: 60px;
}

.url-builder-img-grid-item {
    display: flex;
    flex-direction: column;
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: #fff;
}

.url-builder-img-grid-item:hover {
    border-color: var(--neutral-300);
    box-shadow: var(--shadow-sm);
}

.url-builder-img-grid-item.selected {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

.url-builder-img-grid-thumb {
    width: 100%;
    height: 80px;
    object-fit: cover;
    display: block;
}

.url-builder-img-grid-placeholder {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neutral-100);
    color: var(--neutral-400);
    font-size: 1.5rem;
}

.url-builder-img-grid-info {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.url-builder-img-grid-name {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--neutral-700);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.url-builder-img-grid-dims {
    font-size: 0.6rem;
    color: var(--neutral-400);
}

/* ---------- Load more ---------- */
.url-builder-img-load-more {
    display: block;
    width: 100%;
    margin-top: var(--space-8);
    padding: var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--primary-purple);
    background: transparent;
    border: 1px dashed var(--neutral-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.url-builder-img-load-more:hover {
    background: rgba(113, 97, 239, 0.05);
    border-color: var(--primary-purple);
}

/* ---------- Selected image info bar ---------- */
.url-builder-img-selected {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    padding: var(--space-8);
    background: var(--neutral-50);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    margin-top: var(--space-8);
}

.url-builder-img-selected-thumb {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--neutral-100);
    color: var(--neutral-400);
    flex-shrink: 0;
}

.url-builder-img-selected-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.url-builder-img-selected-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.url-builder-img-selected-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--neutral-800);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.url-builder-img-selected-meta {
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
}

.url-builder-img-change-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-500);
    background: transparent;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}

.url-builder-img-change-btn:hover {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    background: rgba(113, 97, 239, 0.05);
}

/* ---------- Operation dropdown ---------- */
.url-builder-op-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 30;
    width: 340px;
    max-height: 400px;
    overflow-y: auto;
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-4);
}

.url-builder-op-dropdown-search {
    position: sticky;
    top: 0;
    z-index: 1;
    display: block;
    width: 100%;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
    color: var(--neutral-800);
    background: var(--neutral-50);
    border: none;
    border-bottom: 1px solid var(--neutral-200);
    outline: none;
    font-family: inherit;
    box-sizing: border-box;
}

.url-builder-op-dropdown-search::placeholder {
    color: var(--neutral-400);
}

.url-builder-op-dropdown-search:focus {
    background: #fff;
}

.url-builder-op-dropdown-categories {
    padding: var(--space-4) 0;
}

.url-builder-op-dropdown-category {
    margin-bottom: 0;
}

.url-builder-op-dropdown-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    width: 100%;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    background: transparent;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    transition: background var(--transition-fast);
    text-align: left;
}

.url-builder-op-dropdown-category-header:hover {
    background: var(--neutral-50);
}

.url-builder-op-dropdown-category-header i:first-child {
    width: 16px;
    text-align: center;
    color: var(--neutral-400);
    font-size: 0.8em;
}

.url-builder-op-dropdown-category-name {
    flex: 1;
}

.url-builder-op-dropdown-category-count {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--neutral-400);
    background: var(--neutral-100);
    padding: 1px 6px;
    border-radius: 10px;
}

.url-builder-op-dropdown-chevron {
    font-size: 0.65em;
    color: var(--neutral-400);
    transition: transform var(--transition-fast);
}

.url-builder-op-dropdown-chevron.collapsed {
    transform: rotate(-90deg);
}

.url-builder-op-dropdown-items {
    padding: 0 var(--space-4);
}

.url-builder-op-dropdown-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    width: 100%;
    padding: var(--space-8) var(--space-12);
    padding-left: 36px;
    text-align: left;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.url-builder-op-dropdown-item:hover {
    background: rgba(113, 97, 239, 0.06);
}

.url-builder-op-dropdown-item-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--neutral-800);
}

.url-builder-op-dropdown-item-desc {
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
    line-height: 1.3;
}

.url-builder-op-dropdown-empty {
    padding: var(--space-16);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--neutral-400);
    font-style: italic;
}

/* ---------- Operation card ---------- */
.url-builder-op-card {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-12);
    margin-bottom: var(--space-4);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.url-builder-op-card:last-child {
    margin-bottom: 0;
}

.url-builder-op-card:hover {
    border-color: var(--neutral-300);
    box-shadow: var(--shadow-sm);
}

.url-builder-op-card-drag {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    color: var(--neutral-300);
    cursor: grab;
    flex-shrink: 0;
    border-radius: 2px;
    transition: color var(--transition-fast);
}

.url-builder-op-card-drag:hover {
    color: var(--neutral-500);
}

.url-builder-op-card-drag i {
    font-size: 0.75em;
}

.url-builder-op-card-order {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #fff;
    background: var(--primary-purple);
    border-radius: 50%;
    flex-shrink: 0;
}

.url-builder-op-card-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.url-builder-op-card-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--neutral-800);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.url-builder-op-card-name i {
    font-size: 0.8em;
    color: var(--neutral-400);
}

.url-builder-op-card-summary {
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.url-builder-op-card-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    color: var(--neutral-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.url-builder-op-card-remove:hover {
    color: var(--danger);
    background: rgba(255, 86, 48, 0.08);
}

/* ---------- Drag states ---------- */
.url-builder-op-card.is-dragging {
    opacity: 0.4;
    border-style: dashed;
    border-color: var(--neutral-300);
}

.url-builder-op-card.drag-over-top {
    border-top: 2px solid var(--primary-purple);
}

.url-builder-op-card.drag-over-bottom {
    border-bottom: 2px solid var(--primary-purple);
}

.url-builder-op-card-touch-clone {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-purple);
}

/* ---------- Empty state ---------- */
.url-builder-op-empty {
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Stack actions ---------- */
.url-builder-op-stack-actions {
    display: flex;
    justify-content: flex-end;
    padding-top: var(--space-8);
    margin-top: var(--space-4);
    border-top: 1px solid var(--neutral-100);
}

.url-builder-op-clear-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--danger);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.url-builder-op-clear-btn:hover {
    background: rgba(255, 86, 48, 0.08);
    border-color: rgba(255, 86, 48, 0.2);
}


/* ==========================================================================
   Image Selector & Operation Stack - Dark Mode (E23-S02)
   ========================================================================== */

/* Tabs */
[data-theme="dark"] .url-builder-img-tabs {
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-tab {
    color: #71717a;
}

[data-theme="dark"] .url-builder-img-tab:hover:not(.active) {
    color: #a1a1aa;
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-tab.active {
    color: #a78bfa;
    border-bottom-color: #a78bfa;
}

/* Form fields */
[data-theme="dark"] .url-builder-label {
    color: #71717a;
}

[data-theme="dark"] .url-builder-input-group {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-input-group:focus-within {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

[data-theme="dark"] .url-builder-input {
    background: #1a1a2e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-input::placeholder {
    color: #52567a;
}

[data-theme="dark"] .url-builder-input-addon {
    background: #13132b;
    border-left-color: #2a2a3e;
    color: #71717a;
}

[data-theme="dark"] .url-builder-input-addon:hover {
    background: #7161ef;
    color: #fff;
    border-left-color: #7161ef;
}

/* URL preview */
[data-theme="dark"] .url-builder-img-url-preview-inner {
    background: #13132b;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-url-preview-placeholder {
    background: #2a2a3e;
    color: #52567a;
}

[data-theme="dark"] .url-builder-img-url-preview-info {
    color: #71717a;
}

/* Image grid */
[data-theme="dark"] .url-builder-img-grid-item {
    border-color: #2a2a3e;
    background: #1a1a2e;
}

[data-theme="dark"] .url-builder-img-grid-item:hover {
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-img-grid-item.selected {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.2);
}

[data-theme="dark"] .url-builder-img-grid-placeholder {
    background: #2a2a3e;
    color: #52567a;
}

[data-theme="dark"] .url-builder-img-grid-name {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-img-grid-dims {
    color: #52567a;
}

/* Load more */
[data-theme="dark"] .url-builder-img-load-more {
    color: #a78bfa;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-load-more:hover {
    background: rgba(113, 97, 239, 0.1);
    border-color: #7161ef;
}

/* Selected image */
[data-theme="dark"] .url-builder-img-selected {
    background: #13132b;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-selected-thumb {
    background: #2a2a3e;
    color: #52567a;
}

[data-theme="dark"] .url-builder-img-selected-name {
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-img-selected-meta {
    color: #52567a;
}

[data-theme="dark"] .url-builder-img-change-btn {
    color: #71717a;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-img-change-btn:hover {
    color: #a78bfa;
    border-color: #7161ef;
    background: rgba(113, 97, 239, 0.1);
}

/* Operation dropdown */
[data-theme="dark"] .url-builder-op-dropdown {
    background: #1a1a2e;
    border-color: #2a2a3e;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .url-builder-op-dropdown-search {
    background: #13132b;
    border-bottom-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-op-dropdown-search::placeholder {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-dropdown-search:focus {
    background: #1a1a2e;
}

[data-theme="dark"] .url-builder-op-dropdown-category-header {
    color: #71717a;
}

[data-theme="dark"] .url-builder-op-dropdown-category-header:hover {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-op-dropdown-category-header i:first-child {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-dropdown-category-count {
    color: #52567a;
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-op-dropdown-chevron {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-dropdown-item:hover {
    background: rgba(113, 97, 239, 0.1);
}

[data-theme="dark"] .url-builder-op-dropdown-item-name {
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-op-dropdown-item-desc {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-dropdown-empty {
    color: #52567a;
}

/* Operation cards */
[data-theme="dark"] .url-builder-op-card {
    background: #1a1a2e;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-op-card:hover {
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-op-card-drag {
    color: #3a3a4e;
}

[data-theme="dark"] .url-builder-op-card-drag:hover {
    color: #71717a;
}

[data-theme="dark"] .url-builder-op-card-order {
    background: #7161ef;
}

[data-theme="dark"] .url-builder-op-card-name {
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-op-card-name i {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-card-summary {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-card-remove {
    color: #3a3a4e;
}

[data-theme="dark"] .url-builder-op-card-remove:hover {
    color: var(--danger);
    background: rgba(255, 86, 48, 0.12);
}

/* Drag states dark */
[data-theme="dark"] .url-builder-op-card.is-dragging {
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-op-card.drag-over-top {
    border-top-color: #a78bfa;
}

[data-theme="dark"] .url-builder-op-card.drag-over-bottom {
    border-bottom-color: #a78bfa;
}

[data-theme="dark"] .url-builder-op-card-touch-clone {
    border-color: #7161ef;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

/* Stack actions */
[data-theme="dark"] .url-builder-op-stack-actions {
    border-top-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-op-clear-btn:hover {
    background: rgba(255, 86, 48, 0.12);
    border-color: rgba(255, 86, 48, 0.25);
}


/* ==========================================================================
   Image Selector & Operation Stack - Responsive (E23-S02)
   ========================================================================== */

@media (max-width: 767px) {
    .url-builder-img-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .url-builder-op-dropdown {
        width: 280px;
    }

    .url-builder-img-selected {
        flex-wrap: wrap;
    }
}

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

    .url-builder-op-dropdown {
        width: 240px;
        max-height: 300px;
    }

    .url-builder-img-tab {
        font-size: var(--font-size-xs);
        padding: var(--space-4) var(--space-8);
    }
}


/* ==========================================================================
   Image Selector & Operation Stack - Reduced Motion (E23-S02)
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .url-builder-img-tab,
    .url-builder-input-group,
    .url-builder-input-addon,
    .url-builder-img-grid-item,
    .url-builder-img-load-more,
    .url-builder-img-change-btn,
    .url-builder-op-dropdown-category-header,
    .url-builder-op-dropdown-item,
    .url-builder-op-card,
    .url-builder-op-card-drag,
    .url-builder-op-card-remove,
    .url-builder-op-clear-btn,
    .url-builder-op-dropdown-chevron {
        transition: none;
    }
}


/* ==========================================================================
   Image Selector & Operation Stack - Focus / Accessibility (E23-S02)
   ========================================================================== */

.url-builder-img-tab:focus-visible,
.url-builder-input-addon:focus-visible,
.url-builder-img-grid-item:focus-visible,
.url-builder-img-load-more:focus-visible,
.url-builder-img-change-btn:focus-visible,
.url-builder-op-dropdown-search:focus-visible,
.url-builder-op-dropdown-category-header:focus-visible,
.url-builder-op-dropdown-item:focus-visible,
.url-builder-op-card-drag:focus-visible,
.url-builder-op-card-remove:focus-visible,
.url-builder-op-clear-btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}


/* ==========================================================================
   Parameter Controls & Live Preview (E23-S03)
   ========================================================================== */

/* ---------- Expanded Operation Card ---------- */
.url-builder-op-card.is-expanded {
    flex-wrap: wrap;
    box-shadow: var(--shadow-md);
    border-color: var(--neutral-300);
    z-index: 1;
    position: relative;
}

.url-builder-op-card-expand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: var(--neutral-400);
    font-size: 0.65em;
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: auto;
}

.url-builder-op-card.is-expanded .url-builder-op-card-expand-icon {
    transform: rotate(180deg);
}

/* ---------- Parameter Panel Container ---------- */
.url-builder-op-params {
    width: 100%;
    padding: var(--space-12);
    border-top: 1px solid var(--neutral-200);
    background: var(--neutral-50);
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
    margin-top: var(--space-8);
}

.url-builder-op-params-empty {
    font-size: var(--font-size-sm);
    color: var(--neutral-400);
    font-style: italic;
    text-align: center;
    padding: var(--space-8) 0;
    margin: 0;
}

.url-builder-op-params-reset {
    display: inline-block;
    align-self: flex-end;
    padding: var(--space-4) 0;
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-500);
    background: transparent;
    border: none;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.url-builder-op-params-reset:hover {
    color: var(--primary-purple);
}

/* ---------- Slider Component ---------- */
.url-builder-param-slider {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.url-builder-param-slider-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.url-builder-param-slider-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    display: block;
    margin-bottom: var(--space-4);
}

.url-builder-param-slider-header .url-builder-param-slider-label {
    margin-bottom: 0;
}

.url-builder-param-slider-value {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--primary-purple);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.url-builder-param-slider-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-param-slider-range {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    background: var(--neutral-200);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.url-builder-param-slider-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-purple);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: box-shadow var(--transition-fast);
}

.url-builder-param-slider-range::-webkit-slider-thumb:hover {
    box-shadow: 0 1px 6px rgba(113, 97, 239, 0.4);
}

.url-builder-param-slider-range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary-purple);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.url-builder-param-slider-range::-moz-range-track {
    height: 4px;
    background: var(--neutral-200);
    border-radius: 2px;
    border: none;
}

.url-builder-param-slider-input {
    width: 72px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--neutral-800);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    text-align: right;
    outline: none;
    transition: border-color var(--transition-fast);
    flex-shrink: 0;
}

.url-builder-param-slider-input:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

.url-builder-param-slider-unit {
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
    flex-shrink: 0;
    min-width: 18px;
}

/* ---------- Color Picker ---------- */
.url-builder-param-color {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.url-builder-param-color-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-param-color-swatch {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    border: 2px solid var(--neutral-200);
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    background: none;
    flex-shrink: 0;
    overflow: hidden;
}

.url-builder-param-color-swatch::-webkit-color-swatch-wrapper {
    padding: 0;
}

.url-builder-param-color-swatch::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}

.url-builder-param-color-swatch::-moz-color-swatch {
    border: none;
    border-radius: 50%;
}

.url-builder-param-color-swatch:hover {
    border-color: var(--primary-purple);
}

.url-builder-param-color-hex {
    width: 90px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--neutral-800);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast);
}

.url-builder-param-color-hex:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

/* ---------- Dropdown ---------- */
.url-builder-param-dropdown {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.url-builder-param-select {
    display: block;
    width: 100%;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
    font-family: inherit;
    color: var(--neutral-800);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    -webkit-appearance: none;
    -moz-appearance: none;
    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'%3E%3Cpath fill='%2371717a' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    margin-top: var(--space-4);
}

.url-builder-param-select:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

.url-builder-param-select:hover {
    border-color: var(--neutral-300);
}

/* ---------- Text Input ---------- */
.url-builder-param-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.url-builder-param-text-input {
    display: block;
    width: 100%;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-sm);
    font-family: inherit;
    color: var(--neutral-800);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast);
    box-sizing: border-box;
}

.url-builder-param-text-input::placeholder {
    color: var(--neutral-400);
}

.url-builder-param-text-input:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

/* ---------- Size Bar Savings Colors ---------- */
.url-builder-size-savings-green {
    color: var(--success) !important;
}

.url-builder-size-savings-yellow {
    color: #d97706 !important;
}

.url-builder-size-savings-neutral {
    color: var(--neutral-500) !important;
}

.url-builder-size-dimensions {
    font-size: var(--font-size-xs);
    color: var(--neutral-400);
    margin-left: var(--space-4);
}


/* ==========================================================================
   Parameter Controls & Live Preview - Dark Mode (E23-S03)
   ========================================================================== */

/* Expanded card */
[data-theme="dark"] .url-builder-op-card.is-expanded {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-op-card-expand-icon {
    color: #52567a;
}

/* Parameter panel */
[data-theme="dark"] .url-builder-op-params {
    background: #13132b;
    border-top-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-op-params-empty {
    color: #52567a;
}

[data-theme="dark"] .url-builder-op-params-reset {
    color: #71717a;
}

[data-theme="dark"] .url-builder-op-params-reset:hover {
    color: #a78bfa;
}

/* Slider */
[data-theme="dark"] .url-builder-param-slider-label {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-param-slider-value {
    color: #a78bfa;
}

[data-theme="dark"] .url-builder-param-slider-range {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-param-slider-range::-webkit-slider-thumb {
    background: #a78bfa;
    border-color: #1a1a2e;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .url-builder-param-slider-range::-moz-range-thumb {
    background: #a78bfa;
    border-color: #1a1a2e;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .url-builder-param-slider-range::-moz-range-track {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-param-slider-input {
    background: #1a1a2e;
    border-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-param-slider-input:focus {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

[data-theme="dark"] .url-builder-param-slider-unit {
    color: #52567a;
}

/* Color picker */
[data-theme="dark"] .url-builder-param-color-swatch {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-param-color-swatch:hover {
    border-color: #7161ef;
}

[data-theme="dark"] .url-builder-param-color-hex {
    background: #1a1a2e;
    border-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-param-color-hex:focus {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

/* Dropdown */
[data-theme="dark"] .url-builder-param-select {
    background-color: #1a1a2e;
    border-color: #2a2a3e;
    color: #e4e4e7;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
}

[data-theme="dark"] .url-builder-param-select:focus {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

[data-theme="dark"] .url-builder-param-select:hover {
    border-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-param-select option {
    background: #1a1a2e;
    color: #e4e4e7;
}

/* Text input */
[data-theme="dark"] .url-builder-param-text-input {
    background: #1a1a2e;
    border-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-param-text-input::placeholder {
    color: #52567a;
}

[data-theme="dark"] .url-builder-param-text-input:focus {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

/* Size savings */
[data-theme="dark"] .url-builder-size-savings-yellow {
    color: #fbbf24 !important;
}

[data-theme="dark"] .url-builder-size-savings-neutral {
    color: #71717a !important;
}

[data-theme="dark"] .url-builder-size-dimensions {
    color: #52567a;
}


/* ==========================================================================
   Parameter Controls & Live Preview - Responsive (E23-S03)
   ========================================================================== */

@media (max-width: 480px) {
    .url-builder-param-slider-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-4);
    }

    .url-builder-param-slider-input {
        width: 100%;
        text-align: left;
    }

    .url-builder-param-slider-unit {
        display: none;
    }

    .url-builder-param-color-row {
        flex-wrap: wrap;
    }

    .url-builder-param-color-hex {
        flex: 1;
    }
}


/* ==========================================================================
   Parameter Controls & Live Preview - Reduced Motion (E23-S03)
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .url-builder-param-slider-range,
    .url-builder-param-slider-input,
    .url-builder-param-color-swatch,
    .url-builder-param-color-hex,
    .url-builder-param-select,
    .url-builder-param-text-input,
    .url-builder-op-params-reset,
    .url-builder-op-card-expand-icon {
        transition: none;
    }

    .url-builder-param-slider-range::-webkit-slider-thumb {
        transition: none;
    }
}


/* ==========================================================================
   Parameter Controls & Live Preview - Focus / Accessibility (E23-S03)
   ========================================================================== */

.url-builder-param-slider-range:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-param-slider-input:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-param-color-swatch:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-param-color-hex:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-param-select:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-param-text-input:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-op-params-reset:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}


/* ==========================================================================
   URL Generation & Format Selection (E23-S04)
   ========================================================================== */

/* ---------- URL Display ---------- */
.url-builder-url-generated {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.url-builder-url-block {
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.url-builder-url-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-8) var(--space-12);
    background: var(--neutral-50);
    border-bottom: 1px solid var(--neutral-200);
}

.url-builder-url-block-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-500);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.url-builder-url-block-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.url-builder-url-code {
    display: block;
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-xs);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    line-height: 1.6;
    word-break: break-all;
    background: var(--neutral-50);
}

.url-builder-url-base {
    color: var(--neutral-500);
}

.url-builder-url-ops {
    color: var(--primary-purple);
}

.url-builder-url-file {
    color: #0d9488;
}

/* Copy button */
.url-builder-url-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-600);
    background: transparent;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.url-builder-url-copy-btn:hover {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    background: rgba(113, 97, 239, 0.05);
}

.url-builder-url-copy-btn.is-copied {
    color: #059669;
    border-color: #059669;
    background: rgba(5, 150, 105, 0.05);
}

/* Test URL button */
.url-builder-url-test-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--neutral-600);
    background: transparent;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.url-builder-url-test-btn:hover {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    background: rgba(113, 97, 239, 0.05);
}

.url-builder-url-test-btn.is-disabled {
    color: var(--neutral-300);
    border-color: var(--neutral-200);
    background: transparent;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---------- Quality Slider ---------- */
.url-builder-quality-slider {
    margin-top: var(--space-12);
}

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

.url-builder-quality-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--neutral-600);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    cursor: pointer;
}

.url-builder-quality-value {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--primary-purple);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.url-builder-quality-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.url-builder-quality-range {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    background: var(--neutral-200);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.url-builder-quality-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-purple);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: box-shadow var(--transition-fast);
}

.url-builder-quality-range::-webkit-slider-thumb:hover {
    box-shadow: 0 1px 6px rgba(113, 97, 239, 0.4);
}

.url-builder-quality-range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary-purple);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.url-builder-quality-range::-moz-range-track {
    height: 4px;
    background: var(--neutral-200);
    border-radius: 2px;
    border: none;
}

.url-builder-quality-input {
    width: 60px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-xs);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--neutral-800);
    background: #fff;
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    text-align: right;
    outline: none;
    transition: border-color var(--transition-fast);
    flex-shrink: 0;
}

.url-builder-quality-input:focus {
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.1);
}

.url-builder-quality-note {
    margin: var(--space-4) 0 0;
    font-size: 0.7rem;
    color: var(--neutral-400);
    line-height: 1.4;
}

/* ---------- Output Info ---------- */
.url-builder-output-info {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    margin-top: var(--space-12);
    padding: var(--space-8) 0;
}

.url-builder-output-info-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--neutral-500);
}

.url-builder-output-info-item i {
    font-size: 0.75rem;
    color: var(--neutral-400);
}

/* ---------- Copied Tooltip ---------- */
.url-builder-url-copied-tooltip {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--neutral-900);
    color: #fff;
    font-size: var(--font-size-xs);
    font-weight: 500;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 50;
    box-shadow: var(--shadow-md);
    animation: url-builder-tooltip-in 0.15s ease-out;
    pointer-events: none;
}

.url-builder-url-copied-tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-bottom-color: var(--neutral-900);
}


/* ==========================================================================
   URL Generation & Format Selection - Dark Mode (E23-S04)
   ========================================================================== */

[data-theme="dark"] .url-builder-url-block {
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-url-block-header {
    background: #13132b;
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-url-block-label {
    color: #52567a;
}

[data-theme="dark"] .url-builder-url-code {
    background: #0f0f23;
}

[data-theme="dark"] .url-builder-url-base {
    color: #71717a;
}

[data-theme="dark"] .url-builder-url-ops {
    color: #a78bfa;
}

[data-theme="dark"] .url-builder-url-file {
    color: #34d399;
}

[data-theme="dark"] .url-builder-url-copy-btn {
    color: #71717a;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-url-copy-btn:hover {
    color: #a78bfa;
    border-color: #7161ef;
    background: rgba(113, 97, 239, 0.1);
}

[data-theme="dark"] .url-builder-url-copy-btn.is-copied {
    color: #34d399;
    border-color: #059669;
    background: rgba(5, 150, 105, 0.1);
}

[data-theme="dark"] .url-builder-url-test-btn {
    color: #71717a;
    border-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-url-test-btn:hover {
    color: #a78bfa;
    border-color: #7161ef;
    background: rgba(113, 97, 239, 0.1);
}

[data-theme="dark"] .url-builder-url-test-btn.is-disabled {
    color: #3a3a4e;
    border-color: #2a2a3e;
    background: transparent;
}

/* Quality slider dark mode */
[data-theme="dark"] .url-builder-quality-label {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-quality-value {
    color: #a78bfa;
}

[data-theme="dark"] .url-builder-quality-range {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-quality-range::-webkit-slider-thumb {
    background: #7161ef;
    border-color: #1a1a2e;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .url-builder-quality-range::-moz-range-thumb {
    background: #7161ef;
    border-color: #1a1a2e;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .url-builder-quality-range::-moz-range-track {
    background: #2a2a3e;
}

[data-theme="dark"] .url-builder-quality-input {
    background: #0f0f23;
    border-color: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-quality-input:focus {
    border-color: #7161ef;
    box-shadow: 0 0 0 3px rgba(113, 97, 239, 0.15);
}

[data-theme="dark"] .url-builder-quality-note {
    color: #52567a;
}

/* Output info dark mode */
[data-theme="dark"] .url-builder-output-info-item {
    color: #71717a;
}

[data-theme="dark"] .url-builder-output-info-item i {
    color: #52567a;
}

/* Copied tooltip dark mode */
[data-theme="dark"] .url-builder-url-copied-tooltip {
    background: #e4e4e7;
    color: #0f0f23;
}

[data-theme="dark"] .url-builder-url-copied-tooltip::before {
    border-bottom-color: #e4e4e7;
}


/* ==========================================================================
   URL Generation & Format Selection - Responsive (E23-S04)
   ========================================================================== */

@media (max-width: 480px) {
    .url-builder-url-code {
        font-size: 0.65rem;
    }

    .url-builder-url-block-header {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .url-builder-url-block-actions {
        width: 100%;
    }

    .url-builder-quality-row {
        flex-wrap: wrap;
    }

    .url-builder-quality-range {
        flex: 1 1 100%;
    }

    .url-builder-quality-input {
        width: 52px;
    }

    .url-builder-output-info {
        flex-wrap: wrap;
        gap: var(--space-8);
    }
}


/* ==========================================================================
   URL Generation & Format Selection - Reduced Motion (E23-S04)
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .url-builder-url-copy-btn,
    .url-builder-url-test-btn,
    .url-builder-quality-range,
    .url-builder-quality-input,
    .url-builder-quality-range::-webkit-slider-thumb {
        transition: none;
    }

    .url-builder-url-copied-tooltip {
        animation: none;
    }
}


/* ==========================================================================
   URL Generation & Format Selection - Focus / Accessibility (E23-S04)
   ========================================================================== */

.url-builder-url-copy-btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-url-test-btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-quality-range:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-quality-input:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}


/* ==========================================================================
   Embed Code & Performance Hints (E23-S05)
   ========================================================================== */

/* ---------- Collapsible Sections ---------- */

.url-builder-section-header-toggle {
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}

.url-builder-section-header-toggle:hover {
    background: var(--neutral-50);
}

.url-builder-section-chevron {
    font-size: 0.7em;
    color: var(--neutral-400);
    transition: transform var(--transition-fast);
    margin-left: auto;
}

.url-builder-section-header-toggle.is-expanded .url-builder-section-chevron {
    transform: rotate(180deg);
}

/* ---------- Embed Code: Alt Text ---------- */

.url-builder-embed-alt {
    margin-bottom: var(--space-12);
}

.url-builder-embed-alt .url-builder-input {
    width: 100%;
}

/* ---------- Embed Code: Tabs ---------- */

.url-builder-embed-tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-12);
    border-bottom: 2px solid var(--neutral-200);
}

.url-builder-embed-tab {
    flex: 1;
    padding: var(--space-8) var(--space-12);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    color: var(--neutral-500);
    font-size: var(--font-size-xs);
    font-weight: 500;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.url-builder-embed-tab:hover {
    color: var(--neutral-700);
}

.url-builder-embed-tab.active {
    color: var(--primary-purple);
    border-bottom-color: var(--primary-purple);
}

/* ---------- Embed Code: Output ---------- */

.url-builder-embed-output {
    /* container for code + copy */
}

.url-builder-embed-code-wrap {
    position: relative;
}

.url-builder-embed-code {
    background: #0f172a;
    color: #e2e8f0;
    padding: var(--space-16);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: var(--font-size-xs);
    line-height: 1.6;
    margin: 0;
    white-space: pre;
    tab-size: 2;
}

.url-builder-embed-code code {
    background: none;
    padding: 0;
    font-size: inherit;
    color: inherit;
    font-family: inherit;
}

.url-builder-embed-code-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--space-8);
}

.url-builder-embed-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-12);
    background: var(--neutral-100);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-sm);
    color: var(--neutral-600);
    font-size: var(--font-size-xs);
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.url-builder-embed-copy-btn:hover {
    background: var(--neutral-200);
    color: var(--neutral-800);
}

.url-builder-embed-copy-btn.is-copied {
    background: #dcfce7;
    color: #16a34a;
    border-color: #86efac;
}

.url-builder-embed-note {
    margin: var(--space-8) 0 0;
    font-size: var(--font-size-xs);
    color: var(--neutral-500);
    line-height: 1.5;
}

.url-builder-embed-note i {
    margin-right: var(--space-4);
    color: var(--neutral-400);
}

.url-builder-embed-note code {
    background: var(--neutral-100);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 0.9em;
}

/* ---------- Embed Code: Syntax Highlighting ---------- */

.url-builder-embed-tag {
    color: #60a5fa;
}

.url-builder-embed-attr {
    color: #a78bfa;
}

.url-builder-embed-val {
    color: #34d399;
}

.url-builder-embed-punct {
    color: #6b7280;
}

/* ---------- Performance Hints: Badge ---------- */

.url-builder-hints-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 var(--space-4);
    border-radius: 10px;
    background: var(--primary-purple);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    line-height: 1;
    margin-left: var(--space-8);
}

/* ---------- Performance Hints: List ---------- */

.url-builder-hints-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* ---------- Performance Hints: Individual Hint ---------- */

.url-builder-hint {
    display: flex;
    align-items: flex-start;
    gap: var(--space-12);
    padding: var(--space-12);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--neutral-300);
    background: var(--neutral-50);
}

.url-builder-hint-icon {
    flex-shrink: 0;
    width: 24px;
    text-align: center;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.url-builder-hint-content {
    flex: 1;
    min-width: 0;
}

.url-builder-hint-text {
    font-size: var(--font-size-xs);
    color: var(--neutral-700);
    line-height: 1.5;
}

.url-builder-hint-text code {
    background: var(--neutral-100);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 0.9em;
}

/* Severity: info (blue) */
.url-builder-hint-info {
    border-left-color: #3b82f6;
    background: rgba(59, 130, 246, 0.05);
}

.url-builder-hint-info .url-builder-hint-icon {
    color: #3b82f6;
}

/* Severity: success (green) */
.url-builder-hint-success {
    border-left-color: #22c55e;
    background: rgba(34, 197, 94, 0.05);
}

.url-builder-hint-success .url-builder-hint-icon {
    color: #22c55e;
}

/* Severity: warning (orange/amber) */
.url-builder-hint-warning {
    border-left-color: #f59e0b;
    background: rgba(245, 158, 11, 0.05);
}

.url-builder-hint-warning .url-builder-hint-icon {
    color: #f59e0b;
}

/* ---------- Performance Hints: Action Link ---------- */

.url-builder-hint-action {
    display: inline;
    margin-top: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--primary-purple);
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.url-builder-hint-action:hover {
    color: #5f4fd6;
}

/* ---------- Performance Hints: Load Time ---------- */

.url-builder-hint-loadtime {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-8);
    margin-top: var(--space-4);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: var(--font-size-xs);
    color: var(--neutral-600);
}

.url-builder-hint-loadtime span {
    white-space: nowrap;
}

.url-builder-hint-loadtime small {
    color: var(--neutral-400);
    font-weight: 400;
}

.url-builder-hint-loadtime-sep {
    color: var(--neutral-300);
    user-select: none;
}

.url-builder-hint-loadtime-slow {
    color: #ea580c;
    font-weight: 600;
}


/* ==========================================================================
   Embed Code & Performance Hints - Dark Mode (E23-S05)
   ========================================================================== */

[data-theme="dark"] .url-builder-section-header-toggle:hover {
    background: rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .url-builder-section-chevron {
    color: #52567a;
}

/* Embed tabs dark */
[data-theme="dark"] .url-builder-embed-tabs {
    border-bottom-color: #2a2a3e;
}

[data-theme="dark"] .url-builder-embed-tab {
    color: #71717a;
}

[data-theme="dark"] .url-builder-embed-tab:hover {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-embed-tab.active {
    color: #a78bfa;
    border-bottom-color: #a78bfa;
}

/* Embed code block dark */
[data-theme="dark"] .url-builder-embed-code {
    background: #0f0f23;
    color: #d1d5db;
}

/* Syntax colors adjusted for dark bg */
[data-theme="dark"] .url-builder-embed-tag {
    color: #60a5fa;
}

[data-theme="dark"] .url-builder-embed-attr {
    color: #c4b5fd;
}

[data-theme="dark"] .url-builder-embed-val {
    color: #6ee7b7;
}

[data-theme="dark"] .url-builder-embed-punct {
    color: #4b5563;
}

/* Embed copy button dark */
[data-theme="dark"] .url-builder-embed-copy-btn {
    background: #1a1a2e;
    border-color: #2a2a3e;
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-embed-copy-btn:hover {
    background: #2a2a3e;
    color: #e4e4e7;
}

[data-theme="dark"] .url-builder-embed-copy-btn.is-copied {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border-color: rgba(34, 197, 94, 0.3);
}

/* Embed note dark */
[data-theme="dark"] .url-builder-embed-note {
    color: #71717a;
}

[data-theme="dark"] .url-builder-embed-note i {
    color: #52567a;
}

[data-theme="dark"] .url-builder-embed-note code {
    background: #1a1a2e;
}

/* Hints badge dark */
[data-theme="dark"] .url-builder-hints-badge {
    background: #7161ef;
}

/* Hints cards dark */
[data-theme="dark"] .url-builder-hint {
    background: rgba(255, 255, 255, 0.02);
    border-left-color: #3a3a4e;
}

[data-theme="dark"] .url-builder-hint-text {
    color: #a1a1aa;
}

[data-theme="dark"] .url-builder-hint-text code {
    background: #1a1a2e;
}

[data-theme="dark"] .url-builder-hint-info {
    border-left-color: #3b82f6;
    background: rgba(59, 130, 246, 0.08);
}

[data-theme="dark"] .url-builder-hint-success {
    border-left-color: #22c55e;
    background: rgba(34, 197, 94, 0.08);
}

[data-theme="dark"] .url-builder-hint-warning {
    border-left-color: #f59e0b;
    background: rgba(245, 158, 11, 0.08);
}

[data-theme="dark"] .url-builder-hint-action {
    color: #a78bfa;
}

[data-theme="dark"] .url-builder-hint-action:hover {
    color: #c4b5fd;
}

[data-theme="dark"] .url-builder-hint-loadtime {
    color: #71717a;
}

[data-theme="dark"] .url-builder-hint-loadtime small {
    color: #52567a;
}

[data-theme="dark"] .url-builder-hint-loadtime-sep {
    color: #2a2a3e;
}

[data-theme="dark"] .url-builder-hint-loadtime-slow {
    color: #fb923c;
}


/* ==========================================================================
   Embed Code & Performance Hints - Focus / Accessibility (E23-S05)
   ========================================================================== */

.url-builder-embed-tab:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: -2px;
}

.url-builder-embed-copy-btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.url-builder-section-header-toggle:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: -2px;
}

.url-builder-hint-action:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
    border-radius: 2px;
}

.url-builder-embed-alt .url-builder-input:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: -1px;
}


/* ==========================================================================
   Embed Code & Performance Hints - Reduced Motion (E23-S05)
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .url-builder-section-chevron,
    .url-builder-section-header-toggle,
    .url-builder-embed-tab,
    .url-builder-embed-copy-btn,
    .url-builder-hint-action {
        transition: none;
    }
}


/* ==========================================================================
   Embed Code & Performance Hints - Responsive (E23-S05)
   ========================================================================== */

@media (max-width: 480px) {
    .url-builder-embed-tabs {
        flex-wrap: wrap;
    }

    .url-builder-embed-tab {
        flex: 1 1 auto;
        min-width: 0;
    }

    .url-builder-embed-code {
        font-size: 0.65rem;
        padding: var(--space-12);
    }

    .url-builder-hint {
        padding: var(--space-8);
        gap: var(--space-8);
    }

    .url-builder-hint-loadtime {
        flex-direction: column;
        gap: var(--space-4);
    }

    .url-builder-hint-loadtime-sep {
        display: none;
    }
}