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

:root {
    color-scheme: dark;

    /* Surfaces */
    --surface-app: #121212;
    --surface-deep: #0a0a0a;
    --surface-bar: #1a1a1a;
    --surface-panel: #1e1e1e;
    --surface-raised: #242424;
    --surface-elevated: #282828;
    --surface-inset: #202020;
    --surface-hover: #383838;
    --surface-active: #4a4a4a;
    --surface-slate-active: #1e293b;
    --surface-danger: #2c1a1a;
    --surface-glass: rgba(36, 36, 36, 0.9);
    --surface-button: #404040;
    --surface-slate: #334155;
    --surface-slate-hover: #475569;
    --surface-accent-soft: #2a3555;

    /* Borders */
    --border-subtle: #333333;
    --border-default: #404040;
    --border-strong: #505050;
    --border-active: #606060;
    --border-slate: #334155;
    --border-slate-strong: #475569;
    --border-slate-mid: #64748b;
    --border-danger: #663333;

    /* Text */
    --text-strong: #ffffff;
    --text-primary: #e0e0e0;
    --text-secondary: #b8b8b8;
    --text-body: #a0a0a0;
    --text-muted: #909090;
    --text-faint: #808080;
    --text-dim: #606060;
    --text-slate: #cbd5e1;
    --text-slate-muted: #94a3b8;
    --text-link: #4a9eff;
    --text-link-soft: #93c5fd;
    --text-error: #ff8080;
    --text-danger: #ffffff;
    --text-on-accent: #ffffff;

    /* Shadows and overlays */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
    --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    --shadow-focus-soft: 0 0 0 2px rgba(255, 255, 255, 0.08);
    --backdrop: rgba(0, 0, 0, 0.6);
    --backdrop-soft: rgba(0, 0, 0, 0.4);

    /* Monochrome icon filters */
    --icon-filter: brightness(0) invert(0.8);
    --icon-filter-strong: brightness(0) invert(1);
    --icon-filter-unfiltered: invert(0.8);
    --icon-filter-unfiltered-strong: invert(1);
}

/* Light theme: macOS-like white and neutral greys. Only interface chrome is
   themed; the 3D viewport keeps its own colours. */
html[data-theme="light"] {
    color-scheme: light;

    /* Surfaces */
    --surface-app: #f5f5f7;
    --surface-deep: #ffffff;
    --surface-bar: #ececee;
    --surface-panel: #f2f2f5;
    --surface-raised: #ffffff;
    --surface-elevated: #f7f7f9;
    --surface-inset: #ffffff;
    --surface-hover: #e4e4e8;
    --surface-active: #dcdce0;
    --surface-slate-active: #e4ecff;
    --surface-danger: #fde2e2;
    --surface-glass: rgba(255, 255, 255, 0.95);
    --surface-button: #e4e4e8;
    --surface-slate: #e2e8f0;
    --surface-slate-hover: #d6dee8;
    --surface-accent-soft: #e8efff;

    /* Borders */
    --border-subtle: #e5e5e9;
    --border-default: #dcdce0;
    --border-strong: #cdcdd2;
    --border-active: #9d9da6;
    --border-slate: #cbd5e1;
    --border-slate-strong: #94a3b8;
    --border-slate-mid: #94a3b8;
    --border-danger: #dc2626;

    /* Text */
    --text-strong: #1d1d1f;
    --text-primary: #2b2b2e;
    --text-secondary: #4a4a4f;
    --text-body: #5f5f63;
    --text-muted: #6e6e73;
    --text-faint: #7c7c81;
    --text-dim: #8e8e93;
    --text-slate: #3f4a5a;
    --text-slate-muted: #5b6b80;
    --text-link: #0b62d0;
    --text-link-soft: #2563eb;
    --text-error: #b91c1c;
    --text-danger: #b91c1c;
    --text-on-accent: #ffffff;

    /* Shadows and overlays */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.14);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.18);
    --shadow-inset: inset 0 1px 0 rgba(0, 0, 0, 0.04);
    --shadow-focus-soft: 0 0 0 2px rgba(0, 0, 0, 0.08);
    --backdrop: rgba(0, 0, 0, 0.28);
    --backdrop-soft: rgba(0, 0, 0, 0.2);

    /* Monochrome icon filters */
    --icon-filter: brightness(0) invert(0.3);
    --icon-filter-strong: brightness(0) invert(0.15);
    --icon-filter-unfiltered: brightness(0) invert(0.3);
    --icon-filter-unfiltered-strong: brightness(0) invert(0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--surface-app);
    color: var(--text-primary);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--surface-bar);
    color: var(--text-primary);
    padding: 0 20px;
    height: 40px; /* Fixed height for precise dropdown alignment */
    gap: 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 0;
}

.top-bar h1 {
    font-size: 0.85rem;
    margin: 0;
    color: var(--text-primary);
    font-weight: 800;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 100%;
    line-height: 1;
}

.top-bar h1 img {
    display: block;
    flex-shrink: 0;
}

.nav-menus {
    display: flex;
    gap: 5px;
    height: 100%;
}

.top-bar-account {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.top-bar-account-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1px;
    min-width: 0;
}

.top-bar-account-name,
.top-bar-account-role {
    display: block;
    max-width: 240px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-bar-account-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-strong);
}

.top-bar-account-role {
    font-size: 0.68rem;
    color: var(--text-slate-muted);
}

.top-bar-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 28px;
    padding: 0 12px;
    border-radius: 6px;
    border: 1px solid var(--border-slate);
    color: var(--text-slate);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 600;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.top-bar-link:hover {
    background-color: var(--surface-slate-active);
    border-color: var(--border-slate-strong);
    color: var(--text-strong);
}

.top-bar-link-primary {
    background-color: #2563eb;
    border-color: #2563eb;
    color: var(--text-on-accent);
}

.top-bar-link-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    color: var(--text-on-accent);
}

.nav-menu-item {
    position: relative;
    height: 100%;
}

.nav-menu-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px 14px;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px 4px 0 0;
    transition: background 0.1s, color 0.1s;
    height: 40px;
    display: flex;
    align-items: center;
}

.nav-menu-btn:hover {
    color: var(--text-strong);
}

.nav-menu-btn.active {
    background-color: var(--surface-raised);
    color: var(--text-strong);
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 40px; /* Match top-bar height */
    left: 0;
    background-color: var(--surface-raised);
    min-width: 220px;
    z-index: 2000;
    border: 1px solid var(--border-default);
    border-top: none;
    box-shadow: var(--shadow-md);
}

.dropdown-content.show {
    display: block;
}

.dropdown-item {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 10px 15px;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dropdown-item:hover {
    background-color: var(--surface-hover);
    color: var(--text-strong);
}

.dropdown-item.active {
    background-color: var(--surface-slate-active);
    color: var(--text-strong);
}

.dropdown-item-check {
    min-width: 14px;
    text-align: right;
    color: var(--text-link-soft);
    font-weight: 700;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--surface-hover);
    margin: 4px 0;
}

.dropdown-header {
    padding: 10px 15px 4px;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    pointer-events: none;
    user-select: none;
}

.dropdown-header + .dropdown-item {
    padding-top: 6px;
}

/* Settings Modal */
.settings-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--backdrop);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3000;
}

.settings-modal {
    background-color: var(--surface-raised);
    border: 1px solid var(--border-default);
    border-radius: 8px;
    width: 450px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.settings-header {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-default);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--surface-bar);
}

.settings-header h2 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-strong);
}

.settings-body {
    padding: 20px;
}

.settings-section {
    margin-bottom: 25px;
}

.settings-section h3 {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 8px;
}

.settings-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-default);
    display: flex;
    justify-content: flex-end;
    background-color: var(--surface-bar);
}

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.left-panel {
    width: 260px;
    flex-shrink: 0;
    background-color: var(--surface-panel);
    border-right: 1px solid var(--border-subtle);
    overflow: visible;
    padding: 0;
    position: relative;
    /* Use a consistent timing and easing for both width and transform */
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.panel-content {
    height: 100%;
    overflow-y: auto;
    padding: 15px;
    width: 260px; /* Fixed width to prevent content layout shifts during collapse */
    transition: opacity 0.3s ease;
}

.left-panel.collapsed {
    transform: translateX(-260px);
    width: 0;
}

.left-panel.collapsed .panel-content {
    opacity: 0;
    pointer-events: none;
}

.panel-toggle {
    position: absolute;
    top: 50%;
    left: 260px; /* Positioned exactly at the right edge of the 260px panel */
    transform: translateY(-50%);
    width: 20px;
    height: 60px;
    background-color: var(--surface-panel);
    border: 1px solid var(--border-subtle);
    border-left: none;
    border-radius: 0 4px 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-faint);
    z-index: 1001;
    transition: all 0.2s ease;
}

.panel-toggle:hover {
    background-color: var(--surface-elevated);
    color: var(--text-strong);
}

.panel-toggle svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.left-panel.collapsed .panel-toggle svg {
    transform: rotate(180deg);
}

.panel-section {
    margin-bottom: 16px;
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    background-color: var(--surface-panel);
    overflow: hidden;
}

.panel-section h2 {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--surface-elevated);
    padding: 8px 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.panel-section h2::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #94a3b8;
    transition: transform 0.3s ease;
}

.panel-section.is-collapsed h2::after {
    transform: rotate(-90deg);
}

.panel-section.is-collapsed > *:not(h2) {
    display: none !important;
}

.panel-section .component-group, 
.panel-section .input-group {
    padding: 12px 14px;
}

.component-group {
    border-bottom: 1px solid var(--border-slate);
    padding-bottom: 12px;
}

.component-group:last-child {
    border-bottom: none;
}

.component-group h3 {
    color: var(--text-slate-muted) !important;
    font-size: 0.75rem !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px !important;
    font-weight: 600;
}

.input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.input-group.vertical-group {
    flex-direction: column;
    align-items: stretch;
}

.input-group.vertical-group label {
    margin-bottom: 6px;
    display: block;
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    font-size: 0.8rem;
    color: var(--text-body);
}

.input-group input, .input-group select, .input-group textarea {
    width: 100px;
    padding: 6px 10px;
    background-color: var(--surface-app);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.82rem;
    transition: border-color 0.1s;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
    width: 100px;
}

.input-container input {
    width: 100% !important;
    padding-right: 35px !important; /* Space for the unit */
}

.unit-badge {
    position: absolute;
    right: 8px;
    font-size: 0.65rem;
    color: var(--text-dim);
    pointer-events: none;
    font-weight: 600;
}

.input-group input:hover, .input-group select:hover, .input-group textarea:hover {
    border-color: var(--border-strong);
}

.input-group input:focus, .input-group select:focus, .input-group textarea:focus {
    outline: none;
    border-color: var(--border-active);
}

.input-group select {
    width: 140px;
    cursor: pointer;
}

button {
    background-color: var(--surface-button);
    color: var(--text-strong);
    border: 1px solid var(--border-strong);
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.82rem;
    font-weight: 500;
    transition: background 0.1s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

button:hover {
    background-color: var(--surface-active);
}

button:active {
    background-color: var(--surface-elevated);
    transform: translateY(0);
}

button:disabled {
    background-color: var(--surface-raised);
    color: var(--text-dim);
    cursor: not-allowed;
    border-color: var(--border-subtle);
}

.add-wall-btn, #btn-open-divider-modal, #btn-add-top, #btn-open-joint-modal, #btn-mode-corner, #btn-open-handle-modal, #btn-open-text-modal, #btn-open-drawer-modal {
    background-color: var(--surface-slate);
    border: 1px solid var(--border-slate-strong);
    width: 100%;
}

.add-wall-btn:hover, #btn-open-divider-modal:hover, #btn-add-top:hover, #btn-open-joint-modal:hover, #btn-mode-corner:hover, #btn-open-handle-modal:hover, #btn-open-text-modal:hover, #btn-open-drawer-modal:hover {
    background-color: var(--surface-slate-hover);
    border-color: var(--border-slate-mid);
}

.sidebar-action-button {
    justify-content: flex-start;
    text-align: left;
    padding-top: 5px;
    padding-bottom: 5px;
}

.sidebar-action-icon {
    width: 48px;
    height: 32px;
    max-width: 48px;
    max-height: 32px;
    flex: 0 0 32px;
    display: block;
    object-fit: contain;
    object-position: center;
}

.assembly-section .input-group,
.components-section .input-group {
    padding-top: 6px;
    padding-bottom: 6px;
    margin-bottom: 4px;
}

.wall-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.item-list {
    list-style: none;
    margin-top: 10px;
}

.item-list li {
    background: var(--surface-bar);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 10px;
    margin-bottom: 6px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.item-list li:last-child {
    margin-bottom: 0;
}

.item-list li span {
    color: var(--text-strong);
    font-weight: 500;
}

.item-list button {
    background-color: #e74c3c;
    padding: 2px 6px;
    font-size: 0.8rem;
}

.item-list button:hover {
    background-color: #c0392b;
}

.divider-config {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hidden {
    display: none !important;
}

#finger-editor {
    background-color: #f9f9f9;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-top: 10px;
}

#finger-editor h3 {
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.viewer-container {
    flex: 1;
    min-width: 0;
    position: relative;
    background-color: #ffffff;
}

#three-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background-color: #ffffff; /* Match Three.js scene background */
}

.custom-wall-sketch-overlay {
    position: absolute;
    inset: 0;
    z-index: 45;
    pointer-events: none;
}

#custom-wall-sketch-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    background: rgba(248, 250, 252, 0.95);
    pointer-events: auto;
    cursor: crosshair;
}

.custom-wall-sketch-overlay.awaiting-wall-selection #custom-wall-sketch-canvas {
    pointer-events: none;
    background: rgba(248, 250, 252, 0.55);
}

.custom-wall-sketch-toolbar,
.custom-wall-selection-panel,
.custom-wall-sketch-status {
    position: absolute;
    pointer-events: auto;
}

.custom-wall-sketch-toolbar {
    top: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--border-default);
    border-radius: 8px;
    background: var(--surface-raised);
    box-shadow: var(--shadow-md);
    flex-wrap: wrap;
    z-index: 2;
}

.sketch-toolbar-group {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    min-height: 46px;
    padding-right: 14px;
    margin-right: 2px;
    border-right: 1px solid var(--border-subtle);
}

.sketch-toolbar-group:last-of-type {
    border-right: none;
    padding-right: 0;
    margin-right: 0;
}

.sketch-toolbar-label {
    font-size: 0.68rem;
    color: var(--text-slate-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    line-height: 1;
}

.sketch-toolbar-buttons {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.sketch-toolbar-buttons-icons {
    gap: 8px;
}

.sketch-tool-btn,
.primary-sketch-btn,
.secondary-sketch-btn {
    border-radius: 4px;
    min-height: 32px;
    font-size: 0.8rem;
    font-weight: 500;
}

.sketch-tool-btn {
    background: var(--surface-slate);
    border: 1px solid var(--border-slate-strong);
    color: var(--text-strong);
    padding: 6px 12px;
}

.sketch-tool-btn:hover {
    background: var(--surface-slate-hover);
    border-color: var(--border-slate-mid);
}

.sketch-tool-btn.active {
    background: #2563eb;
    border-color: #2563eb;
    color: var(--text-on-accent);
}

.sketch-icon-btn {
    width: 38px;
    min-width: 38px;
    padding: 6px;
}

.sketch-view-btn {
    min-width: 38px;
    padding: 6px 10px;
}

.sketch-view-fit-btn {
    min-width: 46px;
}

.sketch-icon-btn img {
    width: 22px;
    height: 22px;
    display: block;
    object-fit: contain;
    filter: var(--icon-filter-strong);
}

.sketch-joint-btn {
    min-width: 32px;
    padding: 6px 8px;
    font-weight: 600;
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sketch-joint-btn[aria-pressed="true"] {
    background: #2563eb;
    color: var(--text-on-accent);
    border-color: #1d4ed8;
}

.sketch-joint-btn[aria-pressed="false"] {
    background: transparent;
    color: #f59e0b;
    border: 1px dashed #f59e0b;
    box-shadow: none;
}

.sketch-joint-btn[aria-pressed="false"]:hover {
    background: rgba(245, 158, 11, 0.16);
}

.sketch-history-btn {
    min-width: 38px;
    font-size: 16px;
    line-height: 1;
}

.sketch-history-btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

.sketch-toggle {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    align-self: center;
    color: var(--text-body);
    font-size: 0.78rem;
    padding: 6px 0 0;
}

.sketch-toggle input {
    width: auto;
}

.custom-wall-sketch-actions {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    align-self: center;
    margin-left: 10px;
    padding-left: 12px;
    border-left: 1px solid var(--border-subtle);
}

.custom-wall-selection-panel {
    top: 84px;
    left: 20px;
    width: 220px;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-default);
    background: var(--surface-raised);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.custom-wall-selection-panel.hidden {
    display: none;
}

.custom-wall-selection-title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-slate-muted);
    margin-bottom: 6px;
}

.custom-wall-selection-text {
    color: var(--text-body);
    font-size: 0.8rem;
    line-height: 1.45;
}

.custom-wall-sketch-status {
    left: 20px;
    bottom: 20px;
    min-width: 220px;
    padding: 10px 12px;
    border-radius: 6px;
    background: var(--surface-raised);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--border-slate);
    color: var(--text-primary);
    font-size: 0.8rem;
    line-height: 1.45;
    box-shadow: var(--shadow-sm);
}

.primary-sketch-btn {
    background: #2563eb;
    border: 1px solid #2563eb;
    color: var(--text-on-accent);
    min-width: 118px;
}

.primary-sketch-btn:hover {
    background: #1d4ed8;
}

.secondary-sketch-btn {
    background: var(--surface-elevated);
    border: 1px solid var(--border-default);
    color: var(--text-body);
    min-width: 118px;
}

.secondary-sketch-btn:hover {
    background: var(--surface-hover);
    color: var(--text-strong);
}

.custom-wall-sketch-overlay:not(.hidden) ~ .cursor-mode-bar {
    display: none;
}

#viewcube-container {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 120px;
    height: 120px;
}

.viewcube-home-btn {
    position: absolute;
    top: 0;
    left: 0;
    width: 28px;
    height: 28px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    border: 1px solid #ccc;
    border-radius: 4px;
    color: #333;
    cursor: pointer;
    z-index: 10;
    transition: all 0.1s;
}

.viewcube-home-btn:hover {
    background-color: #ffffff;
    border-color: #999;
}

/* Modals & Overlays */
.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.modal-overlay.modal-centered {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--backdrop-soft);
    pointer-events: auto;
}

.modal-overlay.modal-centered .modal-container {
    position: relative;
    top: auto;
    left: auto;
    margin: 0;
    box-shadow: var(--shadow-lg);
}

.modal-container {
    pointer-events: auto;
    background: var(--surface-raised);
    padding: 20px;
    border-radius: 8px;
    width: 300px;
    position: absolute;
    top: 5px;
    left: 5px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-default);
}

.modal-header {
    cursor: grab;
    margin: -20px -20px 15px -20px;
    padding: 12px 20px;
    background: var(--surface-bar);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    border-bottom: 1px solid var(--border-default);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-strong);
    font-weight: 600;
}

.modal-body {
    color: var(--text-body);
}

.modal-selection-text {
    font-size: 0.85rem;
    color: var(--text-faint);
    margin-bottom: 15px;
    min-height: 3em;
    line-height: 1.4;
}

.modal-footer {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.secondary-btn {
    background-color: var(--surface-elevated);
    color: var(--text-body);
    border: 1px solid var(--border-default);
}

.secondary-btn:hover {
    background-color: var(--surface-hover);
    color: var(--text-strong);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-body);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.close-btn:hover {
    color: #333;
    background: none;
}

.properties-body {
    padding: 15px;
}

.properties-section h4 {
    margin: 0 0 12px 0;
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.properties-divider {
    height: 1px;
    background: var(--surface-elevated);
    margin: 15px 0;
}

.property-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.property-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.property-value {
    font-size: 0.85rem;
    color: var(--text-primary);
}

.property-value.fixed {
    color: #d4a373;
    display: flex;
    align-items: center;
    gap: 6px;
}

.property-input {
    width: 100%; /* Take full width of container */
    background: var(--surface-app);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 4px 6px;
    font-size: 0.85rem;
    text-align: right;
}

.property-input.invalid {
    border-color: #e74c3c !important;
    background-color: var(--surface-danger) !important;
}

.property-unit {
    display: none; /* Obsolete now, using unit-badge */
}

.property-row .input-container {
    display: flex;
    align-items: center;
}

.property-toggle-row {
    gap: 12px;
}

.property-toggle {
    width: 18px;
    height: 18px;
    accent-color: #d4a373;
    cursor: pointer;
}

.assembly-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.assembly-item {
    display: flex;
    align-items: stretch;
    gap: 6px;
}

.assembly-item-main {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface-app);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 6px 8px;
    font-size: 0.85rem;
    text-align: left;
    cursor: pointer;
}

.assembly-item-main:hover {
    border-color: #d4a373;
    color: #d4a373;
}

.assembly-item-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.assembly-item-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.assembly-item-delete {
    flex-shrink: 0;
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-app);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
}

.assembly-item-delete:hover {
    border-color: #e74c3c;
    color: #e74c3c;
}

.assembly-item-delete svg {
    width: 14px;
    height: 14px;
}

.property-shape-selector {
    display: flex;
    align-items: center;
    gap: 6px;
}

.property-shape-btn {
    background: var(--surface-bar);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    padding: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.property-shape-btn:hover {
    border-color: var(--border-strong);
    background: var(--surface-elevated);
}

.property-shape-btn.active {
    border-color: #5f87ff;
    background: var(--surface-accent-soft);
    box-shadow: 0 0 0 1px rgba(95, 135, 255, 0.2);
}

.property-shape-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: var(--icon-filter-strong);
    pointer-events: none;
}

/* Tutorial Overlay */
.tutorial-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--backdrop);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.tutorial-box {
    background: var(--surface-raised);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 400px;
    border: 1px solid var(--border-default);
}

.tutorial-box h2 {
    margin-bottom: 15px;
    color: var(--text-strong);
}

.tutorial-box p {
    margin-bottom: 10px;
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-body);
}

.placement-btn {
    background: var(--surface-bar);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s ease;
    width: 64px;
    height: 64px;
}

.placement-btn:hover {
    border-color: var(--border-strong);
    background: var(--surface-elevated);
}

.placement-btn.active {
    border-color: var(--border-active);
    background: var(--surface-hover);
}

.placement-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    filter: var(--icon-filter-unfiltered);
}

.placement-btn.active img {
    filter: var(--icon-filter-unfiltered-strong);
}

/* Cursor Mode Icon Bar */
.cursor-mode-bar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface-raised);
    padding: 4px;
    border-radius: 8px;
    display: flex;
    gap: 4px;
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-md);
    z-index: 50;
}

.mode-btn {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s;
    width: 36px;
    height: 36px;
}

.mode-btn:hover {
    background: var(--surface-hover);
}

.mode-btn.active {
    background: var(--surface-active);
}

.mode-btn img {
    width: 22px;
    height: 22px;
    filter: var(--icon-filter);
    transition: filter 0.1s;
    object-fit: contain;
}

#btn-mode-measure img {
    width: 26px;
    height: 26px;
}

.mode-btn.active img {
    filter: var(--icon-filter-strong);
}

/* Flatpack Mode */
.flatpack-close-btn {
    position: absolute;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    padding: 10px 18px;
    background: var(--surface-raised);
    color: var(--text-strong);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: background 0.15s;
}

.flatpack-close-btn:hover {
    background: var(--surface-hover);
}

.flatpack-active .cursor-mode-bar,
.flatpack-active #viewcube-container,
.flatpack-active .gizmo-floating-input,
.flatpack-active .divider-measure-input,
.flatpack-active .left-panel,
.flatpack-active .panel-toggle {
    pointer-events: none;
    opacity: 0.4;
}

.flatpack-active .nav-menu-btn:not(#nav-flatpack-btn) {
    opacity: 0.4;
    pointer-events: none;
}

.flatpack-active #nav-flatpack-btn {
    background-color: var(--surface-raised);
    color: var(--text-strong);
}

/* Technical Drawing (Blueprint) View */
.blueprint-active .left-panel,
.blueprint-active .panel-toggle,
.blueprint-active .cursor-mode-bar,
.blueprint-active #viewcube-container,
.blueprint-active .gizmo-floating-input,
.blueprint-active .divider-measure-input {
    display: none;
}

.blueprint-view {
    position: fixed;
    top: 40px; /* below the top bar */
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 900; /* above the workbench, below modal overlays */
    background: #d6d6d6;
    display: flex;
    flex-direction: column;
}

.blueprint-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 48px;
    padding: 0 16px;
    background: var(--surface-bar);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.blueprint-toolbar-left,
.blueprint-toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.blueprint-title {
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* Adjustment tool toggles (layout / labels / dimensions + reset) */
.blueprint-tools {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 4px;
    padding-left: 12px;
    border-left: 1px solid var(--border-subtle);
}

.blueprint-tool-btn {
    padding: 5px 11px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.blueprint-tool-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.blueprint-tool-btn.active {
    background: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
}

/* Reminder of the label tool gestures, shown only while it is active */
.blueprint-tool-hint {
    color: var(--text-muted);
    font-size: 0.74rem;
    font-style: italic;
}

.blueprint-tool-reset {
    color: #b45309;
    border-color: #b45309;
}

.blueprint-tool-reset:hover {
    background: #b45309;
    color: #ffffff;
}

/* Pointer feedback while an adjustment tool is active */
body.blueprint-tool-labels #blueprint-canvas,
body.blueprint-tool-dimensions #blueprint-canvas {
    cursor: grab;
    touch-action: none;
}

body.blueprint-tool-layout #blueprint-canvas {
    touch-action: none;
}

/* No text selection while a view, label or dimension is being dragged */
body.blueprint-dragging {
    user-select: none;
}

.blueprint-close-btn {
    padding: 7px 14px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.blueprint-close-btn:hover {
    background: #7f1d1d;
    border-color: #b91c1c;
}

.blueprint-export-btn {
    padding: 7px 16px;
    background: #2563eb;
    color: var(--text-on-accent);
    border: none;
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.blueprint-export-btn:hover {
    background: #1d4ed8;
}

.blueprint-canvas-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 24px;
}

#blueprint-canvas {
    background: #ffffff;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
}

/* Right-click menu: attach a part label to another projection */
.blueprint-label-menu {
    position: fixed;
    z-index: 950;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 176px;
    padding: 5px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.blueprint-label-menu-title {
    padding: 5px 9px 3px;
    color: var(--text-faint);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.blueprint-label-menu-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 9px;
    background: transparent;
    border: none;
    border-radius: 5px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.78rem;
    text-align: left;
    cursor: pointer;
}

.blueprint-label-menu-item:hover {
    background: var(--surface-hover);
}

.blueprint-label-menu-check {
    color: #2563eb;
    font-weight: 700;
}

.measure-selection-summary {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.measure-selection-chip {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px 12px;
    border: 1px solid var(--border-subtle);
    border-left: 5px solid var(--border-slate-strong);
    border-radius: 8px;
    background: var(--surface-elevated);
    color: var(--text-primary);
}

.measure-selection-chip:first-child {
    border-left-color: #10b981;
}

.measure-selection-chip:last-child {
    border-left-color: #f59e0b;
}

.measure-selection-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.measure-results-section {
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    background: var(--surface-raised);
    padding: 12px;
}

.measure-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}

.measure-results-hint,
.measure-results-empty {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.measure-results-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.measure-result-button {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--surface-elevated);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.12s, box-shadow 0.12s, background 0.12s;
}

.measure-result-button:hover {
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.12);
    background: var(--surface-hover);
}

.measure-result-label {
    font-size: 0.82rem;
    color: var(--text-primary);
}

.measure-result-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-strong);
}

.shape-btn {
    background: var(--surface-bar);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s ease;
    width: 64px;
    height: 64px;
}

.shape-btn:hover {
    border-color: var(--border-strong);
    background: var(--surface-elevated);
}

.shape-btn.active {
    border-color: var(--border-active);
    background: var(--surface-hover);
}

.shape-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: var(--icon-filter-unfiltered);
}

.shape-btn.active img {
    filter: var(--icon-filter-unfiltered-strong);
}

/* Helper Classes */
.shortcut-text {
    opacity: 0.5;
    font-size: 0.75rem;
}

.input-group-start {
    justify-content: flex-start;
    gap: 10px;
}

.mb-15 {
    margin-bottom: 15px;
}

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

.flex-between {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
}

.flex-between-small {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
    font-size: 0.85rem;
    margin-top: 5px;
}

.w-60 {
    width: 60px;
}

.p-2 {
    padding: 2px;
}

.w-100 {
    width: 100%;
}

.icon-16 {
    width: 16px;
    height: 16px;
}

.finger-spacing-hint {
    font-size: 0.75rem;
    color: var(--text-faint);
    margin-top: -8px;
    margin-bottom: 12px;
    text-align: right;
}

.mt-15-mb-10 {
    margin-top: 15px;
    margin-bottom: 10px;
}

.placement-label {
    font-size: 0.8rem;
    color: var(--text-body);
    display: block;
    margin-bottom: 8px;
}

.flex-gap-8 {
    display: flex;
    gap: 8px;
}

.flex-1 {
    flex: 1;
}

.flex-2 {
    flex: 2;
}

/* Modal and Utility Extensions */
.z-1001 { z-index: 1001; }
.z-1002 { z-index: 1002; }
.z-1100 { z-index: 1100; }
.z-2000 { z-index: 2000; }

.modal-wall-shape { top: 100px; left: 100px; }
.modal-move { width: 250px; }
.modal-measure { width: 340px; }
.modal-properties { width: 280px; }
.modal-about { width: 320px; }
.modal-export {
    width: min(96vw, 640px);
    max-height: min(92vh, calc(100% - 20px));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-export .modal-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

.modal-export .modal-footer {
    flex-shrink: 0;
    margin-bottom: 0;
}

/* Save Model modal */
.modal-save-model {
    width: min(92vw, 420px);
}

.modal-save-model .modal-footer {
    margin-bottom: 0;
}

.save-model-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.save-model-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-strong);
    background-color: var(--surface-bar);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    box-sizing: border-box;
}

.save-model-input:focus {
    border-color: #4a9eff;
    box-shadow: 0 0 0 1px rgba(74, 158, 255, 0.4);
}

.save-model-hint {
    margin: 10px 0 0;
    font-size: 0.72rem;
    color: var(--text-faint);
    line-height: 1.4;
}

/* My Models modal */
.modal-models {
    width: min(96vw, 860px);
    max-height: min(92vh, calc(100% - 20px));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-models .modal-body {
    flex: 1;
    min-height: 220px;
    overflow-y: auto;
}

.modal-models .modal-footer {
    flex-shrink: 0;
    margin-bottom: 0;
}

.my-models-status {
    color: var(--text-faint);
    font-size: 0.85rem;
    text-align: center;
    padding: 40px 10px;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}

.model-card {
    background: var(--surface-panel);
    border: 1px solid var(--border-default);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.model-card:hover {
    border-color: #4a9eff;
    transform: translateY(-2px);
}

.model-card-thumb {
    aspect-ratio: 4 / 3;
    background: var(--surface-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.model-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.model-card-thumb.model-card-placeholder {
    color: var(--text-dim);
    font-size: 0.75rem;
}

.model-card-info {
    padding: 10px 12px 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.model-card-name {
    color: var(--text-strong);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-card-date {
    color: var(--text-faint);
    font-size: 0.72rem;
}

.model-card-actions {
    padding: 0 12px 10px;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.model-card-btn {
    flex: 1;
    background: var(--surface-elevated);
    color: var(--text-body);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    font-size: 0.72rem;
    padding: 5px 8px;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.model-card-btn-text {
    flex: 0 0 auto;
}

.model-card-btn-icon {
    flex: 0 0 auto;
    min-width: 26px;
    padding: 4px 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.model-card-btn-icon svg {
    width: 13px;
    height: 13px;
    display: block;
}

.model-card-btn[data-tooltip] {
    position: relative;
}

.model-card-btn[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 6px);
    right: 0;
    background: var(--surface-app);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 0.68rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    z-index: 10;
}

.model-card-btn[data-tooltip]:hover::after {
    opacity: 1;
}

.model-card-btn-armed[data-tooltip]::after {
    content: none;
}

.model-card-rename-input {
    background: var(--surface-elevated);
    border: 1px solid #4a9eff;
    border-radius: 4px;
    color: var(--text-strong);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    padding: 1px 6px;
    width: 100%;
    min-width: 0;
}

.model-card-rename-input:focus {
    outline: none;
    border-color: #4a9eff;
}

.model-card-btn:hover {
    background: var(--surface-hover);
    color: var(--text-strong);
}

.model-card-btn:disabled {
    opacity: 0.6;
    cursor: default;
}

.model-card-btn-danger:hover {
    background: var(--surface-danger);
    color: var(--text-error);
    border-color: #7a3030;
}

.model-card-btn-armed,
.model-card-btn-armed:hover {
    background: var(--surface-danger);
    color: var(--text-strong);
    border-color: #a04040;
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 18px;
}

/* Settings tabs (reuse the export tab styling) */
.settings-tab-list {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
    padding: 0 2px;
    border-bottom: 1px solid var(--border-default);
}

.settings-tab-button {
    flex: 1;
    position: relative;
    padding: 11px 14px;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 10px 10px 0 0;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transform: translateY(1px);
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.settings-tab-button:hover {
    background: var(--surface-inset);
    color: var(--text-primary);
}

.settings-tab-button.active {
    background: var(--surface-elevated);
    border-color: var(--border-active);
    box-shadow: var(--shadow-inset);
    color: var(--text-strong);
}

.settings-tab-button.active::after {
    content: "";
    position: absolute;
    left: -1px;
    right: -1px;
    bottom: -1px;
    height: 2px;
    background: var(--surface-raised);
}

.settings-tab-panel {
    display: none;
}

.settings-tab-panel.active {
    display: block;
}

.settings-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 10px;
}

.theme-mode-row {
    justify-content: space-between;
    gap: 12px;
}

.theme-mode-label {
    font-size: 0.8rem;
    color: var(--text-body);
}

.theme-mode-switch {
    display: inline-flex;
    gap: 2px;
    padding: 2px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-default);
    border-radius: 6px;
}

.theme-mode-btn {
    appearance: none;
    background: none;
    border: none;
    border-radius: 4px;
    padding: 5px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.12s ease, color 0.12s ease;
}

.theme-mode-btn:hover {
    color: var(--text-strong);
}

.theme-mode-btn.active {
    background: #2563eb;
    color: #ffffff;
}

.settings-color-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0;
}

.settings-cnc-only.is-hidden {
    display: none;
}

.settings-color-row label {
    flex: 1;
}

.settings-color-input {
    appearance: none;
    -webkit-appearance: none;
    width: 48px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--border-default);
    border-radius: 6px;
    background: none;
    cursor: pointer;
}

.settings-color-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.settings-color-input::-webkit-color-swatch {
    border: none;
}

.settings-color-input::-moz-color-swatch {
    border: none;
}

.export-tab-list {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
    padding: 0 2px;
    border-bottom: 1px solid var(--border-default);
}

.export-tab-button {
    flex: 1;
    position: relative;
    padding: 11px 14px;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 10px 10px 0 0;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transform: translateY(1px);
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.export-tab-button:hover {
    background: var(--surface-inset);
    color: var(--text-primary);
}

.export-tab-button.active {
    background: var(--surface-elevated);
    border-color: var(--border-active);
    box-shadow: var(--shadow-inset);
    color: var(--text-strong);
}

.export-tab-button.active::after {
    content: "";
    position: absolute;
    left: -1px;
    right: -1px;
    bottom: -1px;
    height: 2px;
    background: var(--surface-raised);
}

.export-tab-button:focus-visible {
    outline: none;
    color: var(--text-strong);
    box-shadow: var(--shadow-focus-soft);
}

.export-tab-panel {
    display: none;
}

.export-tab-panel.active {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.export-format-group,
.export-stroke-group,
.export-kerf-group,
.export-clearance-group,
.export-dogbone-group {
    margin-bottom: 0;
}

.export-kerf-group,
.export-clearance-group,
.export-dogbone-group {
    display: grid;
    grid-template-columns: 110px 140px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
}

.export-kerf-group > label,
.export-clearance-group > label,
.export-dogbone-group > label {
    margin: 0;
    line-height: 1.15;
    align-self: start;
}

.export-kerf-group .input-container,
.export-clearance-group .input-container {
    width: 100%;
}

.export-kerf-group .input-container input,
.export-clearance-group .input-container input {
    min-width: 0;
    padding-right: 35px !important;
}

.export-dogbone-fields {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.export-dogbone-fields select {
    min-width: 0;
    width: 100%;
}

.export-dogbone-custom {
    width: 120px;
}

.export-dogbone-custom[hidden] {
    display: none;
}

.export-dogbone-custom input {
    min-width: 0;
    padding-right: 35px !important;
}

.export-radio-group {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.export-radio-option,
.export-checkbox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.export-radio-option {
    background: var(--surface-bar);
    border: 1px solid var(--border-default);
    border-radius: 8px;
    padding: 10px 12px;
    cursor: pointer;
}

.export-radio-option input,
.export-checkbox-option input {
    margin: 0;
}

.export-checkbox-option {
    cursor: pointer;
}

.export-helper-text {
    margin: 0;
    color: var(--text-body);
    font-size: 0.8rem;
    line-height: 1.5;
}

.export-preview-panel {
    background: var(--surface-bar);
    border: 1px solid var(--border-default);
    border-radius: 10px;
    padding: 12px;
}

.export-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
}

.export-preview-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 46px;
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-strong);
    color: var(--text-strong);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

.export-preview-canvas {
    display: block;
    width: 100%;
    height: min(240px, 32vh);
    background: #ffffff;
    border-radius: 8px;
}

.export-preview-size-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-subtle);
}

.export-preview-size-label {
    color: var(--text-body);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.export-preview-size-value {
    color: var(--text-strong);
    font-size: 0.9rem;
    font-weight: 600;
}

.export-preview-note {
    margin: 10px 0 0 0;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-muted);
}
.modal-corners { width: 320px; }

.corner-selection-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text-body);
}

.checkbox-container input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.checkbox-container.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-container.disabled input {
    cursor: not-allowed;
}

.modal-handle {
    width: 340px;
}

.modal-text {
    width: 360px;
}

.modal-text .input-group {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    align-items: center;
    gap: 6px;
}

.modal-text .input-group > :not(label) {
    width: 100%;
    min-width: 0;
}

.modal-text .input-group input,
.modal-text .input-group select,
.modal-text .input-group textarea {
    width: 100%;
}

.text-font-picker {
    position: relative;
    width: 100%;
}

.text-font-trigger {
    width: 100%;
    min-height: 42px;
    background: var(--surface-deep);
    border: 1px solid var(--border-slate-strong);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    cursor: pointer;
    text-align: left;
}

.text-font-trigger:hover {
    border-color: var(--border-slate-mid);
}

.text-font-trigger-preview {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1rem;
    text-align: left;
}

.text-font-trigger-caret {
    color: var(--text-slate-muted);
    flex-shrink: 0;
}

.text-font-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    max-height: 260px;
    overflow-y: auto;
    background: var(--surface-app);
    border: 1px solid var(--border-slate);
    border-radius: 6px;
    box-shadow: var(--shadow-md);
    z-index: 1200;
    padding: 6px;
}

.text-font-option {
    width: 100%;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--text-primary);
    padding: 10px 12px;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 3px;
    cursor: pointer;
}

.text-font-option:hover,
.text-font-option.is-selected {
    background: rgba(59, 130, 246, 0.14);
    border-color: rgba(96, 165, 250, 0.45);
}

.text-font-option-name {
    font-size: 1.05rem;
    line-height: 1.1;
    margin-bottom: 2px;
}

.text-font-option-meta {
    font-size: 0.72rem;
    color: var(--text-slate-muted);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.modal-text textarea {
    min-height: 84px;
    resize: vertical;
    font-family: inherit;
}

.modal-text input[readonly] {
    color: var(--text-slate);
}

.handle-offset-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.handle-offset-row select {
    flex: 1;
}

.handle-offset-row .input-container {
    width: 120px;
}

.corner-control-item {
    background: var(--surface-bar);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    padding: 12px;
    margin-bottom: 10px;
}

.corner-control-item h4 {
    font-size: 0.8rem;
    color: #d4a373;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.text-center { text-align: center; }
.p-30-20 { padding: 30px 20px; }
.mt-10 { margin-top: 10px; }
.mt-5 { margin-top: 5px; }
.mt-15 { margin-top: 15px; }
.mt-30 { margin-top: 30px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.pt-20 { padding-top: 20px; }

.border-top { border-top: 1px solid #404040; }
.text-small { font-size: 0.8rem; }
.text-muted { color: #64748b; }
.text-large { font-size: 1.1rem; }
.font-bold { font-weight: 600; }

.btn-delete {
    width: 100%;
    background-color: var(--surface-danger) !important;
    border-color: var(--border-danger) !important;
    color: var(--text-danger) !important;
}
.btn-delete:hover {
    background-color: var(--surface-danger) !important;
    border-color: var(--border-danger) !important;
    color: var(--text-danger) !important;
}

/* Notification System */
.notification-container {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}

.notification {
    background-color: var(--surface-raised);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: 6px;
    border-left: 4px solid var(--border-default);
    box-shadow: var(--shadow-sm);
    min-width: 250px;
    max-width: 400px;
    pointer-events: auto;
    animation: slideIn 0.3s ease, fadeOut 0.5s ease 4.5s forwards;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notification.success { border-left-color: #2ecc71; }
.notification.error { border-left-color: #e74c3c; }
.notification.warning { border-left-color: #f1c40f; }
.notification.info { border-left-color: #3498db; }

.notification.confirm {
    border-left-color: #9b59b6;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    animation: slideIn 0.3s ease; /* Remove auto-fade out for confirmations */
}

.prompt-notification {
    min-width: 320px;
}

.action-notification {
    min-width: 340px;
    max-width: 520px;
}

.notification-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-strong);
}

.notification-message {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-slate);
}

.action-notification-actions {
    flex-wrap: wrap;
}

.action-notification-actions .confirm-btn,
.action-notification-actions a.confirm-btn {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.prompt-notification-input {
    width: 100%;
    padding: 8px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-strong);
    background-color: var(--surface-bar);
    color: var(--text-primary);
    outline: none;
}

.prompt-notification-input:focus {
    border-color: #9b59b6;
    box-shadow: 0 0 0 1px rgba(155, 89, 182, 0.4);
}

.confirm-actions {
    display: flex;
    gap: 8px;
    width: 100%;
    justify-content: flex-end;
}

.confirm-btn {
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    border: none;
    transition: opacity 0.1s;
}

.confirm-btn:hover {
    opacity: 0.8;
}

.ok-btn {
    background-color: #9b59b6;
    color: white;
}

.cancel-btn {
    background-color: var(--surface-button);
    color: var(--text-primary);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* Floating Gizmo Input */
.gizmo-floating-input {
    position: absolute;
    transform: translate(-50%, -100%);
    background: var(--surface-glass);
    border: 1px solid #00aaff;
    border-radius: 4px;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    pointer-events: auto;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.gizmo-floating-input input {
    background: transparent;
    border: none;
    color: var(--text-strong);
    font-size: 0.9rem;
    width: 60px;
    text-align: right;
    outline: none;
}

.gizmo-floating-input .unit-text {
    font-size: 0.75rem;
    color: var(--text-faint);
    font-weight: 600;
}

/* Divider ghost gap inputs (blue to match the ghost preview) */
.divider-measure-input {
    position: absolute;
    transform: translate(-50%, -50%);
    background: var(--surface-glass);
    border: 1px solid #3498db;
    border-radius: 4px;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    pointer-events: auto;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.divider-measure-input.hidden {
    display: none;
}

.divider-measure-input input {
    background: transparent;
    border: none;
    color: var(--text-strong);
    font-size: 0.9rem;
    width: 60px;
    text-align: right;
    outline: none;
}

.divider-measure-input .unit-text {
    font-size: 0.75rem;
    color: var(--text-faint);
    font-weight: 600;
}

/* Export modal: machine selection + bed size inputs */
.export-bed-fields,
.machine-bed-fields {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.export-bed-fields .input-container,
.machine-bed-fields .input-container {
    flex: 1;
    min-width: 90px;
}

.export-bed-separator {
    color: var(--text-faint);
    font-size: 0.9rem;
    font-weight: 600;
}

.export-bed-fields .secondary-btn {
    flex-shrink: 0;
}

/* Machines modal (Settings > Machine Settings + export dropdown entry point) */
.modal-machines {
    width: min(96vw, 560px);
    max-height: min(92vh, calc(100% - 20px));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-machines .modal-body {
    flex: 1;
    min-height: 200px;
    overflow-y: auto;
}

.modal-machines .modal-footer {
    flex-shrink: 0;
    margin-bottom: 0;
}

.machine-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 12px;
}

.machine-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.machine-list-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    background: var(--surface-panel);
    border: 1px solid var(--border-default);
    border-radius: 8px;
}

.machine-list-main {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.machine-list-main strong {
    color: var(--text-primary);
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.machine-list-meta {
    color: var(--text-faint);
    font-size: 0.78rem;
}

.machine-list-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.machine-list-empty {
    color: var(--text-faint);
    font-size: 0.85rem;
    text-align: center;
    padding: 28px 10px;
}