/* Native CAD Design System from CADpanel.html */

* {
    box-sizing: border-box;
    font-family: inherit;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    touch-action: none;
    -webkit-overflow-scrolling: touch;
    font-family: var(--cad-font-family);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

input, select, textarea, button {
    font-family: var(--cad-font-family);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

.hidden {
    display: none !important;
}

.cad-ui-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 6px;
    padding: 9px 14px;
    font: 600 13px/1 inherit;
    cursor: pointer;
    border: none;
    background: transparent;
    color: inherit;
    transition: background var(--cad-transition-fast), color var(--cad-transition-fast), border-color var(--cad-transition-fast);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: none;
    border-radius: 6px;
    padding: 9px 14px;
    font: 600 13px/1 inherit;
    cursor: pointer;
}

.btn-primary {
    background: var(--cad-accent-blue);
    color: #ffffff;
}

.btn-secondary {
    background: var(--cad-bg-tertiary);
    border: 1px solid var(--cad-border-standard);
    color: var(--cad-text-main);
}

.btn-xs {
    padding: 5px 10px;
    font-size: 11px;
}

.btn-icon {
    height: 32px;
    width: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-wide {
    width: 100%;
    height: 32px;
}

.stepper-container {
    display: flex;
    align-items: center;
    background: var(--cad-bg-tertiary);
    border: 1px solid var(--cad-border-standard);
    border-radius: 4px;
    overflow: hidden;
    height: 28px;
}

.stepper-container input {
    border: none !important;
    min-width: 50px !important;
    flex: 1;
    text-align: center;
    background: transparent !important;
    padding: 0 6px !important;
    margin: 0 !important;
    font-weight: 600;
    -moz-appearance: textfield;
    appearance: none;
}

.stepper-container input::-webkit-outer-spin-button,
.stepper-container input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.stepper-btn {
    background: var(--cad-bg-standard);
    border: none;
    width: 24px;
    height: 100%;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cad-accent-blue);
    transition: background var(--cad-transition-fast);
}

.stepper-btn:hover {
    background: #e0e0e0;
}

.stepper-btn:active {
    background: #d0d0d0;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: rgba(0, 0, 0, 0.06);
    color: var(--cad-text-muted);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.36);
    color: var(--cad-text-main);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
    border-color: rgba(0, 0, 0, 0.08);
}

.tab-btn:hover:not(.active) {
    background: rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 0, 0, 0.12);
}

.tab-content {
    display: none;
    flex-direction: column;
    gap: var(--cad-gap);
}

.tab-content.active {
    display: flex;
}

.slider-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.slider-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.slider-name {
    font-size: 12px;
    font-weight: 700;
    color: var(--cad-text-main);
}

.slider-val {
    font-size: 12px;
    color: var(--cad-text-muted);
    min-width: 48px;
    text-align: right;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.slider-row input[type=range] {
    flex: 1;
    accent-color: var(--cad-accent-blue);
}

    .main-content {
        flex: 1;
        overflow-y: auto;
        padding: var(--cad-gap);
        background: var(--cad-bg-secondary);
    }

    .panel {
        background: rgba(255, 255, 255, 0.7);
        border-left: 3px solid #ccc;
        border-radius: var(--cad-radius-lg);
        overflow: hidden;
        flex-shrink: 0;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    }

    .panel-header {
        padding: 9px 12px;
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: #111;
        background: rgba(0, 0, 0, 0.05);
        cursor: pointer;
        user-select: none;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .panel-header::before {
        content: '▼';
        font-size: 14px;
        transition: transform 0.2s;
        width: 16px;
        display: inline-block;
        text-align: center;
        opacity: 0.6;
    }

    .panel.collapsed .panel-header::before,
    .panel-header.collapsed::before {
        transform: rotate(-90deg);
    }

    .panel-body {
        padding: var(--cad-panel-body-padding) !important;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .panel.collapsed .panel-body {
        display: none;
    }

:root {
    /* Base Spacing & Sizing */
    --cad-border-width: 1px;
    --cad-radius-sm: 2px;
    --cad-radius-md: 4px;
    --cad-radius-lg: 8px;
    --cad-gap: 12px;
    --cad-panel-body-padding: 12px;

    /* Semantic Color Palette (from CADpanel & cadstyle) */
    --cad-bg-standard: #ffffff;
    --cad-bg-secondary: #f3f3f3;
    --cad-bg-tertiary: #e0e0e0;
    --cad-border-standard: #ddd;
    --cad-border-focus: #4a9eff;
    
    /* Animations & Transitions */
    --cad-transition-fast: 0.15s ease;
    --cad-transition-standard: 0.25s ease;
    --cad-border-soft: #eeeeee;

    --cad-accent-blue: #0696D7;
    --cad-accent-hover: #057fb5;
    --cad-accent-green: #34a853;

    --cad-text-main: #333333;
    --cad-text-muted: #666666;

    /* Typography */
    --cad-font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Self-hosted fonts available across Native CAD palettes */
@font-face { font-family: 'Arial';              font-weight: 400; src: url('fonts/arial.ttf') format('truetype'); }
@font-face { font-family: 'Arial';              font-weight: 700; src: url('fonts/arial-bold.ttf') format('truetype'); }
@font-face { font-family: 'Tahoma';             font-weight: 400; src: url('fonts/tahoma.ttf') format('truetype'); }
@font-face { font-family: 'Tahoma';             font-weight: 700; src: url('fonts/tahoma-bold.ttf') format('truetype'); }
@font-face { font-family: 'Verdana';            font-weight: 400; src: url('fonts/verdana.ttf') format('truetype'); }
@font-face { font-family: 'Verdana';            font-weight: 700; src: url('fonts/verdana-bold.ttf') format('truetype'); }
@font-face { font-family: 'Bahnschrift';        font-weight: 400; src: url('fonts/bahnschrift.ttf') format('truetype'); }
@font-face { font-family: 'Impact';             font-weight: 400; src: url('fonts/impact.ttf') format('truetype'); }
@font-face { font-family: 'Georgia';            font-weight: 400; src: url('fonts/georgia.ttf') format('truetype'); }
@font-face { font-family: 'Georgia';            font-weight: 700; src: url('fonts/georgia-bold.ttf') format('truetype'); }
@font-face { font-family: 'Times New Roman';    font-weight: 400; src: url('fonts/times.ttf') format('truetype'); }
@font-face { font-family: 'Times New Roman';    font-weight: 700; src: url('fonts/times-bold.ttf') format('truetype'); }
@font-face { font-family: 'Courier New';        font-weight: 400; src: url('fonts/courier.ttf') format('truetype'); }
@font-face { font-family: 'Courier New';        font-weight: 700; src: url('fonts/courier-bold.ttf') format('truetype'); }
@font-face { font-family: 'Cascadia Code';      font-weight: 400; src: url('fonts/CascadiaCode-Regular.ttf') format('truetype'); }
@font-face { font-family: 'Cascadia Code';      font-weight: 700; src: url('fonts/CascadiaCode-Bold.ttf') format('truetype'); }
@font-face { font-family: 'Cascadia Mono';      font-weight: 400; src: url('fonts/CascadiaMono-Regular.ttf') format('truetype'); }
@font-face { font-family: 'Cascadia Mono';      font-weight: 700; src: url('fonts/CascadiaMono-Bold.ttf') format('truetype'); }
@font-face { font-family: 'Marlett';            font-weight: 400; src: url('fonts/marlett.ttf') format('truetype'); }

@keyframes cad-pulse-live {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); transform: scale(1); }
    70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); transform: scale(1.05); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); transform: scale(1); }
}

@keyframes cad-pulse-warn {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); transform: scale(1); }
    70% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); transform: scale(1.05); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); transform: scale(1); }
}

.cad-status-light {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: var(--cad-transition-standard);
}

.cad-status-light.live {
    background-color: var(--cad-accent-green);
    animation: cad-pulse-live 2s infinite;
}

.cad-status-light.dead {
    background-color: var(--cad-accent-red);
    animation: cad-pulse-warn 3s infinite;
}

/* =========================================
   1. App Layout Layout classes
========================================= */
.cad-app-shell,
.cad-app-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    font-family: var(--cad-font-family);
    background-color: #f5f5f5;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.cad-navbar {
    background-color: #ffffff;
    border-bottom: var(--cad-border-width) solid var(--cad-border-soft);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    height: 36px;
    width: 100%;
    z-index: 50;
}

.cad-nav-group {
    display: flex;
    align-items: center;
    gap: 24px;
}

.cad-nav-title {
    color: #1e40af;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: -0.025em;
}

.cad-nav-links {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
}

.cad-nav-link {
    color: #6b7280;
    padding: 4px;
    text-decoration: none;
    transition: color 0.15s;
}

.cad-nav-link:hover {
    color: #1f2937;
}

.cad-nav-link.active {
    color: #1d4ed8;
    border-bottom: 2px solid #2563eb;
    font-weight: 600;
}

.cad-nav-icons {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cad-nav-icon {
    color: #6b7280;
    font-size: 18px;
    cursor: pointer;
}

.cad-workspace {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.cad-viewport-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.3;
    filter: grayscale(100%);
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cad-viewport-img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.cad-footer-bar {
    background-color: #f3f4f6;
    border-top: var(--cad-border-width) solid var(--cad-border-soft);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    height: 32px;
    width: 100%;
    z-index: 50;
}

.cad-footer-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cad-footer-text {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    color: #6b7280;
}

.cad-footer-link {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
}

.cad-footer-link:hover {
    color: #1f2937;
}

/* =========================================
   2. Dialog Component
========================================= */
.cad-dialog {
    background-color: #fcfcfc;
    border: var(--cad-border-width) solid var(--cad-border-color);
    border-radius: var(--cad-radius-md);
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.12);
    width: 350px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    resize: both;
    overflow: hidden;
}

/* 3. Sidebar/Property Panel (Docked, borderless) */
.cad-sidebar-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
    flex-shrink: 0;
    background-color: transparent;
}

.cad-header,
.cad-accordion-header {
    padding: 5px 8px;
    display: flex;
    align-items: center;
    background-color: #edeef0;
    border: none;
    cursor: pointer;
    font-size: 11px;
    font-weight: 700;
    color: #444;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.cad-accordion-header.dark {
    background-color: #e5e7eb;
    padding-left: 16px; /* Indented for secondary level */
}

.cad-accordion-header.dark + .cad-accordion-body {
    padding-left: 16px; /* Align content with indented header */
}

.cad-header-minimize,
.cad-accordion-icon {
    margin-right: 6px;
    font-size: 12px;
    color: #555;
    transition: transform 0.2s;
    font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 20;
}

/* Collapse behavior */
.collapsed .cad-header-minimize,
.collapsed .cad-accordion-icon {
    transform: rotate(-90deg);
}

.cad-dialog-content.collapsed,
.cad-accordion-body.collapsed,
.cad-indented-row.collapsed {
    display: none !important;
}

.cad-dialog-content {
    padding: 4px 0;
    flex: 1;
    /* Consume available vertical space */
    overflow-y: auto;
    /* Scroll internally if contents overflow */
    overflow-x: hidden;
}

.cad-field-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: center;
    padding: 4px 8px;
}

.cad-label {
    font-size: 12px;
    color: #333;
}

/* --- Shared Control Base (The Bone Structure) --- */
.cad-input,
.cad-btn,
.cad-select-wrap,
.cad-nested-input {
    height: 24px;
    border-radius: var(--cad-radius-sm);
    font-size: 11.5px;
    transition: all 0.05s;
    display: inline-flex;
    align-items: center;
    box-sizing: border-box;
}

/* 3. Form Inputs */
.cad-input {
    border: var(--cad-border-width) solid #ccc;
    padding: 0 4px;
    width: 100%;
    background-color: #ffffff;
}

.cad-input:hover {
    border: 1.5px solid #a0a0a0;
    /* Standard hover */
}

.cad-textarea {
    width: 100%;
    min-height: 120px;
    border: var(--cad-border-width) solid var(--cad-border-color);
    border-radius: var(--cad-radius-sm);
    padding: 8px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 11.5px;
    line-height: 1.5;
    background-color: #ffffff;
    resize: vertical;
    outline: none;
    color: #1a2634;
}

.cad-textarea:focus {
    border-color: #00a2e8;
}

.cad-select-wrap {
    position: relative;
    background-color: #ffffff;
    border: var(--cad-border-width) solid #bcbcbc;
    padding: 0 4px;
    width: 100%;
}

.cad-select-wrap:hover {
    border: 1.5px solid #a0a0a0;
}

.cad-select-icon {
    font-size: 14px;
    margin-right: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    pointer-events: none;
    z-index: 1;
    /* Stay above the select's background but below the text if needed */
}

.cad-select-icon-blue {
    color: #3b82f6;
}

.cad-select {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: transparent;
    border: none;
    font-size: 11.5px;
    appearance: none;
    outline: none;
    z-index: 2;
    cursor: pointer;
    /* Use padding to avoid the icon and arrow visually */
    padding-left: 24px;
    padding-right: 16px;
}

/* If no icon is present, we need a way to adjust padding. 
   I'll add a utility class for that. */
.cad-select-no-icon {
    padding-left: 6px !important;
}

.cad-select-arrow {
    font-size: 8px;
    color: #9ca3af;
    pointer-events: none;
    margin-left: auto;
    /* Push to the far right */
    z-index: 1;
}

.cad-nested-input {
    background-color: #ffffff;
    border: var(--cad-border-width) solid var(--cad-border-soft);
    padding: 0 4px;
    width: 80px;
}

.cad-nested-input:hover {
    border: 1.5px solid #a0a0a0;
}

.cad-nested-input.disabled {
    background-color: #f9fafb;
    border: 1px solid #e5e7eb;
    width: 64px;
    opacity: 0.5;
}

.cad-nested-input input {
    width: 100%;
    font-size: 11px;
    border: none;
    padding: 0;
    outline: none;
    background-color: transparent;
}

.checkbox-custom {
    width: 14px;
    height: 14px;
    border: 1px solid #707070;
    background: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 1px;
    cursor: pointer;
}

.checkbox-custom.checked {
    background: #666666;
    border-color: #666666;
}

.checkbox-custom.checked::after {
    content: '✔';
    font-size: 10px;
    color: #ffffff;
    font-weight: bold;
}

/* =========================================
   4. Selection Box
========================================= */
.cad-selection-box {
    border: var(--cad-border-width) solid var(--cad-border-color);
    border-radius: var(--cad-radius-sm);
    margin: 4px 8px 0 8px;
    min-height: 120px;
    background: #fff;
    position: relative;
}

.cad-selection-item {
    background-color: #e5f3ff;
    display: flex;
    align-items: center;
    padding: 4px 8px;
    font-size: 12px;
    gap: 8px;
}

.cad-selection-count {
    font-size: 12px;
}

.cad-selection-config {
    display: flex;
    align-items: center;
    margin-left: auto;
    gap: 4px;
}

.cad-selection-tag {
    display: flex;
    align-items: center;
    margin-left: 8px;
    font-size: 11px;
    gap: 4px;
}

.cad-selection-tag-icon {
    font-size: 14px;
    color: #2563eb;
}

.cad-selection-tools {
    position: absolute;
    bottom: 4px;
    left: 4px;
    display: flex;
    gap: 8px;
}

/* =========================================
   5. Buttons & Icons
========================================= */
.cad-icon-btn {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #666;
    cursor: pointer;
}

.cad-icon-btn.small {
    font-size: 12px;
}

.cad-icon-btn:hover {
    background-color: #eee;
}

.cad-btn {
    min-width: 75px;
    border: 1px solid #bcbcbc;
    background: #ffffff;
    color: #333;
    justify-content: center;
    padding: 0 12px;
    cursor: pointer;
}

.cad-btn:hover {
    border: 1.5px solid #a0a0a0;
    background: #ffffff;
}

/* --- Theme Modifiers (The Skin) --- */
.cad-btn-primary {
    background: #0696D7;
    color: #ffffff;
    border: 1px solid #057fb5;
    font-weight: 500;
}

.cad-btn-primary:hover {
    background: #058ac7;
    border: 1.5px solid #5db0e5;
    /* Distinct blue hover */
}

.cad-btn.disabled {
    background: #f4f4f4;
    color: #a0a0a0;
    border: var(--cad-border-width) solid #d9d9d9;
    cursor: default;
}

.cad-select-button {
    border: var(--cad-border-width) solid var(--cad-border-soft);
    /* Default is neutral */
    background: #ffffff;
    border-radius: var(--cad-radius-sm);
    padding: 0 8px;
    height: 22px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: all 0.1s;
}

.cad-select-button:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.cad-select-button.active,
.cad-select-button.selecting {
    border: 1.5px solid #5db0e5;
    /* Paler blue outline */
    background: #e5f3ff;
    /* Pale blue */
    color: #333;
}

.cad-select-button.active:hover {
    background: #d1e9ff;
    border-color: #008cd2;
}

/* Custom Selection Cursor Icon matching Fusion 360 screenshot */
.cad-cursor-icon {
    width: 14px;
    height: 14px;
    display: inline-block;
}

.cad-cursor-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0px 1px 1px rgba(0, 0, 0, 0.1));
}

.cad-cursor-path {
    fill: #ffffff;
    /* White fill */
    stroke: #444444;
    /* Grey outline */
    stroke-width: 1.5px;
    stroke-linejoin: round;
}

.cad-select-button svg,
.cad-select-button .material-symbols-outlined {
    color: #4b5563;
}

.material-symbols-outlined {
    font-size: 16px;
}

/* =========================================
   6. Utilities
========================================= */
.cad-divider-hr {
    border-top: var(--cad-border-width) solid var(--cad-border-soft);
    margin: 4px 8px;
}

.cad-mt-2 {
    margin-top: 8px;
}

.cad-h-2 {
    height: 8px;
}

.cad-footer {
    border-top: var(--cad-border-width) solid #e0e0e0;
    border-bottom-left-radius: var(--cad-radius-md);
    border-bottom-right-radius: var(--cad-radius-md);
    padding: 8px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background-color: #fcfcfc;
}

.cad-footer-info {
    margin-right: auto;
    align-self: center;
}

.cad-footer-info-icon {
    font-size: 14px;
    color: #9ca3af;
    background-color: #e5e7eb;
}

/* Native CAD Responsive - Vertical Mode Overrides */

@media (max-width: 700px) {
  /* Stack the main content vertically */
  .cad-main-content {
    grid-template-columns: 1fr !important;
    grid-template-rows: var(--cad-preview-height, 40vh) 12px 1fr !important;
    display: grid !important;
  }

  /* Viewport (3D Preview) at the top */
  .cad-viewport {
    grid-column: 1 !important;
    grid-row: 1 !important;
    border-bottom: 1px solid var(--cad-border-standard);
  }

  /* Resizer becomes a horizontal bar */
  .cad-resizer {
    grid-column: 1 !important;
    grid-row: 2 !important;
    width: 100% !important;
    height: 12px !important;
    cursor: row-resize !important;
    border-left: none !important;
    border-right: none !important;
    background: rgba(0, 0, 0, 0.05) !important;
  }

  /* Professional grab handle for horizontal resizer */
  .cad-resizer::after {
    width: 32px !important;
    height: 2px !important;
  }

  /* Sidebar at the bottom */
  .cad-sidebar {
    grid-column: 1 !important;
    grid-row: 3 !important;
    width: 100% !important;
    border-right: none !important;
    border-top: 1px solid var(--cad-border-standard);
    background: #fff !important;
  }

  /* Ensure the app-shell handles the stack height */
  .cad-app-shell {
    overflow: hidden;
  }
}

/* Specific UI cleanup for narrow modes */
@media (max-width: 400px) {
  .cad-header {
    padding: 0 8px;
  }
  .cad-footer {
    font-size: 9px;
  }
}
    border-radius: 9999px;
    padding: 2px;
}

/* =========================================
   7. Top-Level Tabs (Text-Based)
========================================= */
.cad-text-tabs-bar {
    display: flex;
    border-bottom: var(--cad-border-width) solid var(--cad-border-soft);
    padding: 0 16px;
    background-color: #f3f4f6;
    /* subtle gray matching the header */
}

.cad-text-tab-item {
    padding: 8px 16px;
    font-size: 13px;
    color: #4b5563;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    margin-bottom: -1px;
}

.cad-text-tab-item:hover {
    color: #1f2937;
}

.cad-text-tab-item.active {
    color: #1f2937;
    /* Dark gray text, not blue */
    border-bottom-color: #0696D7;
    /* Fusion Blue underline */
    font-weight: 500;
}

/* =========================================
   8. Multi-Column Layouts
========================================= */
.cad-split-view {
    display: flex;
    width: 100%;
    flex: 1;
    /* Stretch to fill the remaining dialog height */
    overflow: hidden;
    /* Prevent column overflow from breaking out */
}

.cad-split-left {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 8px 8px 16px 8px;
    overflow-y: auto;
    /* Internal scrolling for left column */
}

.cad-split-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 8px;
    background-color: #f9fafb;
    border-left: var(--cad-border-width) solid var(--cad-border-soft);
    overflow-y: auto;
    /* Internal scrolling for right column */
}

/* =========================================
   9. Headers & Status Indicators
========================================= */
.cad-status-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background-color: #eef7ff;
    /* Pale blue status background */
    border-bottom: var(--cad-border-width) solid #c7ddf7;
    font-size: 11.5px;
    color: #175a99;
}

.cad-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #2f7d3f;
    /* Live green */
}

.cad-status-label {
    font-weight: 700;
}

.cad-section-header {
    font-size: 15px;
    color: #4b5563;
    font-weight: 400;
    margin-top: 16px;
    margin-bottom: 8px;
    padding-left: 8px;
}

.cad-section-header:first-child {
    margin-top: 8px;
}

.cad-field-row-wide {
    display: grid;
    grid-template-columns: 160px 1fr;
    align-items: center;
    padding: 2px 8px;
    min-height: 28px;
}

/* 10. Accordion / Collapsible Groups */
.cad-accordion-header,
.cad-checkbox-header {
    padding: 6px 8px;
    display: flex;
    align-items: center;
    font-size: 12px;
    font-weight: 600;
    color: #1f2937;
    cursor: pointer;
    margin-bottom: 2px;
}

.cad-accordion-header {
    background-color: #f3f4f6;
}

.cad-checkbox-header {
    padding: 8px 8px 8px 4px;
    border-top: var(--cad-border-width) solid var(--cad-border-soft);
}

.cad-accordion-header.dark {
    background-color: #e5e7eb;
}

.cad-accordion-icon {
    font-size: 14px;
    margin-right: 8px;
    color: #6b7280;
    transition: transform 0.2s;
}

.cad-accordion-header.collapsed .cad-accordion-icon {
    transform: rotate(-90deg);
}

.cad-accordion-body {
    padding-left: 2px;
    padding-right: 2px;
    margin-bottom: 8px;
}

.cad-accordion-body.collapsed {
    display: none;
}

/* =========================================
   11. Input Groups (Inline Icons)
========================================= */
.cad-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

/* =========================================
   12. Tool Palette UI Patterns
========================================= */

/* Icon-Only Top Tabs */
.cad-icon-tabs {
    display: flex;
    background-color: #f3f4f6;
    border-bottom: var(--cad-border-width) solid var(--cad-border-color);
    /* Main separator line */
    padding-left: 4px;
    /* Slight indent from the left edge */
}

.cad-icon-tab {
    width: 36px;
    /* Fixed width, no flex spanning */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 30px;
    cursor: pointer;
    border-left: 1px solid transparent;
    border-right: 1px solid transparent;
    border-bottom: 1px solid transparent;
    color: #4b5563;
    transition: background-color var(--cad-transition-fast), border-color var(--cad-transition-fast), transform 0.12s;
    user-select: none;
    font-size: 18px;
    /* Slightly larger icon */
    margin-bottom: -1px;
    /* Pull down to overlap the container's bottom border */
    z-index: 1;
}

.cad-icon-tab:hover:not(.active) {
    background-color: #e5e7eb;
}

.cad-icon-tab.active {
    background-color: #ffffff;
    color: #1f2937;
    border-left: var(--cad-border-width) solid var(--cad-border-color);
    border-right: var(--cad-border-width) solid var(--cad-border-color);
    border-bottom: var(--cad-border-width) solid #ffffff;
    /* Erase the container's bottom border */
    z-index: 2;
}

/* Checkbox Accordions */
.cad-checkbox-header {
    padding-left: 16px; /* Match nested accordion indentation */
    display: flex;
    align-items: center;
}

.cad-checkbox-header .checkbox-custom {
    margin-right: 8px;
    margin-left: 0;
}

.cad-indented-row {
    padding-left: 40px; /* 16px header indent + 24px content indent */
}

/* Dropdowns with Inner Icons */
/* Nested Data Tables / Toolbars */
.cad-inner-table {
    border: var(--cad-border-width) solid var(--cad-border-soft);
    border-radius: var(--cad-radius-sm);
    background-color: #ffffff;
    width: 100%;
    margin-top: 4px;
    display: flex;
    flex-direction: column;
}

.cad-table-header {
    display: flex;
    font-size: 10px;
    color: #6b7280;
    padding: 4px 8px;
    border-bottom: var(--cad-border-width) solid var(--cad-border-soft);
}

.cad-table-row {
    display: flex;
    align-items: center;
    padding: 4px 8px;
    border-bottom: var(--cad-border-width) solid var(--cad-border-soft);
}

.cad-table-toolbar {
    display: flex;
    background-color: #f9fafb;
    padding: 4px;
    gap: 4px;
}

.cad-table-toolbar .cad-icon-btn {
    color: #9ca3af;
}

.cad-table-toolbar .cad-icon-btn:hover {
    color: #374151;
}

/* Static Read-Only Data Rows */
.cad-static-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: center;
    padding: 4px 8px;
}

.cad-static-value {
    font-size: 12px;
    color: #4b5563;
}

/* ==========================================================================
   APP LAYOUT SYSTEM
   Fusion 360-style multi-panel shells (Header + Sidebar + Main)
   ==========================================================================/* (App shell logic now consolidated at top of file) */

.cad-app-header {
    height: 32px;
    /* standard fusion height for toolbars */
    background: var(--cad-bg-standard);
    border-bottom: 1px solid var(--cad-border-standard);
    display: flex;
    align-items: center;
    padding: 0 8px;
    flex-shrink: 0;
    gap: 8px;
    z-index: 10;
}

.cad-app-body {
    display: grid;
    grid-template-columns: var(--sidebar-width, 240px) 6px 1fr;
    flex: 1;
    overflow: hidden;
}

.cad-app-sidebar {
    grid-column: 1;
    background: #f5f5f5;
    border-right: none;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    min-height: 0;
}

#cad-resizer {
    grid-column: 2;
    background: #f0f0f0;
    border-left: 1px solid var(--cad-border-standard);
    border-right: 1px solid var(--cad-border-standard);
    cursor: col-resize;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.1s;
}

#cad-resizer:hover,
#cad-resizer.resizing {
    background: var(--cad-accent-blue);
    border-color: var(--cad-accent-blue);
}

#cad-resizer::after {
    content: '';
    width: 2px;
    height: 20px;
    background: #ccc;
    border-radius: 1px;
}

.cad-app-main {
    grid-column: 3;
    background: #ddd;
    position: relative;
    overflow: hidden;
}

/* ==========================================================================
   COMPLEX SIDEBAR CONTROLS
   Slider + Stepper, Tool Buttons, and Action Triplets
   ========================================================================== */

/* Slider Row: [ Slider (flex:1) | Stepper ] */
.cad-slider-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

/* Custom Range Input Styling (Fusion Blue) */
input[type="range"].cad-slider {
    -webkit-appearance: none;
    flex: 1;
    min-width: 20px; /* Allow shrinking for narrow sidebars */
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    outline: none;
    margin: 0;
}

input[type="range"].cad-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--cad-accent-blue);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Tool Buttons: Large side-by-side actions */
.cad-btn-tool {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 32px;
    flex: 1;
    background: #f0f0f0;
    border: 1px solid var(--cad-border-standard);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    color: var(--cad-text-main);
    cursor: pointer;
    transition: all 0.1s;
}

.cad-btn-tool:hover {
    background: #e8e8e8;
    border-color: #bbb;
}

.cad-btn-tool.active {
    background: #fff;
    border-color: var(--cad-accent-blue);
    box-shadow: 0 0 0 1px var(--cad-accent-blue);
}

.cad-btn-tool .material-symbols-outlined {
    font-size: 16px;
}

/* Action Rows: Compact triplets (Undo/Redo/Clear) */
.cad-action-row {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.cad-action-row .cad-btn {
    flex: 1;
    padding: 4px;
    font-size: 10px;
    height: 22px;
    background: #f5f5f5;
}

/* Panel Accents */
.cad-accordion-wrap.accent-green {
    border-left: 3px solid var(--cad-accent-green);
}

.cad-accordion-header span.material-symbols-outlined {
    font-size: 14px;
    margin-right: 6px;
    opacity: 0.8;
}

/* ==========================================================================
   MODAL & DIALOG SYSTEM
   ========================================================================== */
.cad-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    display: none;
    /* hidden by default */
    align-items: center;
    justify-content: center;
}

.cad-modal-window {
    background: var(--cad-bg-standard);
    border: 1px solid #777;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-width: 95vw;
    max-height: 95vh;
}

.cad-modal-header {
    background: #e8e8e8;
    border-bottom: 1px solid var(--cad-border-standard);
    padding: 4px 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 11px;
    color: #333;
    flex-shrink: 0;
}

.cad-modal-body {
    flex: 1;
    overflow: hidden;
    background: var(--cad-bg-standard);
}

.cad-modal-footer {
    background: #e8e8e8;
    border-top: 1px solid var(--cad-border-standard);
    padding: 8px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    flex-shrink: 0;
}