/* ==================== Variables (8px Grid System) ==================== */
:root {
    /* 8px Grid System */
    --unit: 8px;
    --space-0_5: calc(var(--unit) * 0.5);   /* 4px */
    --space-1: calc(var(--unit) * 1);   /* 8px */
    --space-2: calc(var(--unit) * 2);   /* 16px */
    --space-3: calc(var(--unit) * 3);   /* 24px */
    --space-4: calc(var(--unit) * 4);   /* 32px */
    --space-5: calc(var(--unit) * 5);   /* 40px */

    /* Typography (8px grid) */
    --font-h1: 24px;              /* Title */
    --font-h2: 16px;              /* H2 */
    --font-body: 14px;            /* Body */
    --font-body-small: 12px;      /* Body Small / Uppercase */

    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;

    /* Light Mode Colors (Default) */
    --primary-color: #141716;
    --secondary-color: #55615c;
    --accent-color: #4a8d74;
    --success-color: #22c55e;
    --bg-color: #f2f3f2;
    --panel-bg: #ffffff;
    --border-color: #c0c8c4;
    --text-primary: #141716;
    --text-secondary: #55615c;
    --text-muted: #8a9490;
    --input-bg: #ffffff;
    --canvas-bg: #ffffff;
    --slider-track: rgba(0, 0, 0, 0.12);
    --slider-thumb: #141716;
    --bg-secondary: #e6e8e6;

    /* Shadows */
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);

    /* Border Radius */
    --radius: 1px;           /* Large containers, panels, modals */
    --radius-sm: 1px;        /* Small elements, buttons, inputs */

    /* Transitions */
    --transition: all 0.2s ease;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --primary-color: #dee3e1;
    --secondary-color: #768780;
    --accent-color: #a1cfbc;
    --success-color: #34d399;
    --bg-color: #090a0a;
    --panel-bg: #121414;
    --border-color: #2a3230;
    --text-primary: #dee3e1;
    --text-secondary: #768780;
    --text-muted: #2a3230;
    --input-bg: #121414;
    --canvas-bg: #121414;
    --slider-track: rgba(222, 227, 225, 0.12);
    --slider-thumb: #dee3e1;
    --bg-secondary: #0f1111;

    /* Adjusted shadows for dark mode */
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.5);
}

/* ==================== Reset & Base ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*:focus { outline: none; }
*:focus-visible { outline: 2px solid var(--accent-color); outline-offset: 2px; border-radius: 1px; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 999; padding: 8px 16px; background: var(--accent-color); color: var(--bg-color); font-size: 14px; text-decoration: none; font-family: var(--font-mono); }
.skip-link:focus { left: 8px; top: 8px; }

body {
    font-family: 'Figtree', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden;
    font-weight: 400;
}

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

/* ==================== Layout ==================== */
.container {
    display: -ms-grid;
    display: grid;
    -ms-grid-columns: 360px 1fr;
    grid-template-columns: 360px 1fr;
    height: 100vh;
    min-height: 100vh;
    max-height: 100vh;
    gap: 0;
    overflow: hidden;
}

.controls {
    /* Glassmorphic background - Light mode */
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);

    padding: var(--space-3);
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;

    /* Glassmorphic border and shadow */
    border-right: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);

    height: 100vh;
    min-height: 100vh;
    max-height: 100vh;
    box-sizing: border-box;
    position: relative;
    z-index: 100;
}

/* Glassmorphic Dark Mode */
[data-theme="dark"] .controls {
    background: rgba(26, 26, 26, 0.7);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

.canvas-area {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    padding: var(--space-5);
    background: var(--bg-color);
    position: relative;
    height: 100vh;
    box-sizing: border-box;
}

/* ==================== Header ==================== */
.header {
    margin-bottom: var(--space-2);
}

.header h1 {
    font-size: var(--font-h1);
    font-weight: var(--weight-bold);
    letter-spacing: -0.5px;
    margin-bottom: var(--space-1);
    line-height: 1.2;
}

/* ==================== Sections ==================== */
.section {
    margin-bottom: var(--space-4);
}

.section h2 {
    font-size: var(--font-body-small);
    font-weight: var(--weight-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-2);
}

/* ==================== Form Controls ==================== */
.control-group {
    margin-bottom: var(--space-2);
    min-height: 0;
}

label {
    display: block;
    font-size: var(--font-body-small);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    margin-bottom: var(--space-0_5);
    line-height: 1;
}

.select-input,
.text-input {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    padding: var(--space-1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-body);
    font-family: 'Figtree', sans-serif;
    background: var(--input-bg);
    background-color: var(--input-bg);
    color: var(--text-primary);
    transition: var(--transition);
    box-sizing: border-box;
}

/* Select dropdown arrow for Safari/Webkit */
.select-input {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-1) center;
    background-size: 12px;
    padding-right: var(--space-4);
}

.select-input:focus,
.text-input:focus {
    outline: none;
    border-color: var(--border-color);
    box-shadow: none;
}

.select-input:focus-visible,
.text-input:focus-visible,
.slider:focus-visible,
.btn:focus-visible,
.tool-btn:focus-visible,
.aspect-btn:focus-visible,
.theme-toggle:focus-visible {
    outline: none;
}

.text-input[type="number"] {
    -moz-appearance: textfield;
    font-variant-numeric: tabular-nums;
}

.text-input[type="number"]::-webkit-inner-spin-button,
.text-input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ==================== Location Button ==================== */
/* Input with icon button inside */
.input-with-icon {
    position: relative;
    width: 100%;
}

.input-with-icon .text-input {
    padding-right: var(--space-5);
}

.input-icon-btn {
    position: absolute;
    right: var(--space-1);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.input-icon-btn:hover {
    color: var(--accent-color);
    background: var(--border-color);
}

.input-icon-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.input-icon-btn.loading {
    opacity: 0.5;
    cursor: wait;
}

.input-icon-btn svg {
    flex-shrink: 0;
}

/* ==================== Geocode Dropdown ==================== */
.geocode-wrapper {
    position: relative;
}

.geocode-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 200;
    margin-top: 4px;
    padding: 0;
    list-style: none;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    max-height: 260px;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.geocode-dropdown.visible {
    display: block;
}

.geocode-dropdown li {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 10px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    min-height: 44px;
    justify-content: center;
}

.geocode-dropdown li:last-child {
    border-bottom: none;
}

.geocode-dropdown li:hover,
.geocode-dropdown li.active {
    background: var(--border-color);
}

.geocode-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
}

.geocode-detail {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.geocode-empty {
    font-style: italic;
    color: var(--text-secondary);
    cursor: default;
    font-size: 12px;
}

.geocode-empty:hover {
    background: transparent;
}

/* ==================== Sliders (Japodian Echoes Style) ==================== */
.control-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-0_5);
    line-height: 1;
}

.slider {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--slider-track);
    outline: none;
    cursor: pointer;
    margin: 0;
    padding: 0;
    display: block;
    border: none;
    border-radius: 0;
    position: relative;
}

.slider::-webkit-slider-track {
    width: 100%;
    height: 6px;
    background: transparent;
    border: none;
    border-radius: 0;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 0;
    height: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    outline: none;
    cursor: pointer;
}

.slider::-moz-range-track {
    width: 100%;
    height: 6px;
    background: transparent;
    border: none;
    border-radius: 0;
}

.slider::-moz-range-thumb {
    -moz-appearance: none;
    appearance: none;
    width: 0;
    height: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    outline: none;
    cursor: pointer;
}

.slider::-moz-range-progress {
    background: transparent;
}

/* File Input */
.file-input {
    width: 100%;
    padding: var(--space-2);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-body-small);
    font-family: 'Figtree', sans-serif;
    cursor: pointer;
    transition: var(--transition);
}

.file-input:hover {
    border-color: var(--accent-color);
    background: var(--bg-secondary);
}

/* Toggle Buttons - Minimal Black & White Style */
.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.toggle-label {
    font-size: var(--font-body);
    color: var(--text-primary);
    user-select: none;
}

.toggle-btn {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    position: relative;
    width: 44px;
    height: 24px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-shrink: 0;
}

.toggle-btn:focus {
    outline: none;
}

.toggle-btn:focus-visible .toggle-track {
    box-shadow: none;
}

.toggle-track {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--slider-track);
    border: none;
    border-radius: 1px;
    transition: all 0.2s ease;
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--panel-bg);
    border-radius: 1px;
    transition: all 0.2s ease;
}

/* Active/On State */
.toggle-btn.active .toggle-track,
.toggle-btn[aria-pressed="true"] .toggle-track {
    background: var(--text-primary);
}

.toggle-btn.active .toggle-thumb,
.toggle-btn[aria-pressed="true"] .toggle-thumb {
    left: 22px;
    background: var(--panel-bg);
}

/* Dark Mode Toggle Styles */
[data-theme="dark"] .toggle-track {
    background: #404040; /* Visible gray on dark background */
}

[data-theme="dark"] .toggle-thumb {
    background: #808080; /* Gray thumb when off (visible on dark track) */
}

[data-theme="dark"] .toggle-btn.active .toggle-track,
[data-theme="dark"] .toggle-btn[aria-pressed="true"] .toggle-track {
    background: var(--text-primary); /* Warm white track when on */
}

[data-theme="dark"] .toggle-btn.active .toggle-thumb,
[data-theme="dark"] .toggle-btn[aria-pressed="true"] .toggle-thumb {
    background: var(--bg-color); /* Dark thumb on light track when on */
}

/* ==================== Buttons ==================== */
.btn {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    height: var(--space-5);          /* 40px - 8px grid */
    padding: 0 var(--space-2);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-body);
    font-weight: var(--weight-semibold);
    font-family: 'Figtree', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    gap: var(--space-1);
    text-transform: none;
    box-sizing: border-box;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: var(--primary-color);
    background-color: var(--primary-color);
    color: var(--panel-bg);
    margin-bottom: var(--space-1);
}

.btn-primary:hover {
    opacity: 0.85;
    -webkit-transform: translateY(-1px);
    -ms-transform: translateY(-1px);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-primary:active {
    -webkit-transform: translateY(0);
    -ms-transform: translateY(0);
    transform: translateY(0);
}


/* ── Compass / North Arrow Grid Picker ── */
.compass-picker {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
    margin-top: 8px;
    margin-bottom: var(--space-2);
}
.compass-picker-item {
    aspect-ratio: 1;
    min-width: 0;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--input-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    transition: border-color 0.15s;
    overflow: hidden;
}
.compass-picker-item:hover {
    border-color: var(--primary-color);
}
.compass-picker-item.active {
    border-color: var(--primary-color);
}
.compass-picker-item svg {
    width: 100%;
    height: 100%;
    display: block;
}
[data-theme="dark"] .compass-picker-item svg {
    filter: invert(1);
}

.variant-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-0_5);
    margin-top: var(--space-1);
}

.btn-secondary {
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger-hover:hover {
    color: #991b1b;
    border-color: #fca5a5;
    background: #fee2e2;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    margin-top: var(--space-1);
}

.btn-outline:hover {
    background: var(--bg-secondary);
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-1);
    margin-bottom: var(--space-1);
}

/* Aspect Ratio Selector */
.aspect-ratio-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    margin-top: 8px;
}

.aspect-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 6px;
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Figtree', sans-serif;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
}

.aspect-btn:hover {
    border-color: var(--primary-color);
    background: rgba(44, 62, 80, 0.05);
}

.aspect-btn.active {
    border: 1.5px solid var(--primary-color);
    background: var(--bg-secondary);
    color: var(--primary-color) !important;
}

.aspect-btn.active svg {
    stroke: var(--primary-color) !important;
}

.aspect-btn.active span {
    color: var(--primary-color) !important;
}

.aspect-btn svg {
    stroke: var(--text-secondary);
    transition: stroke 0.2s ease;
    flex-shrink: 0;
}

.aspect-btn:hover svg {
    stroke: var(--primary-color);
}

.aspect-btn.active:hover svg {
    stroke: var(--primary-color) !important;
}

.aspect-btn span {
    font-size: 10px;
    letter-spacing: 0.02em;
    font-weight: 600;
}

/* ==================== Status Message ==================== */
.status-message {
    padding: 0;
    padding-left: 4px;
    background: none;
    font-size: var(--font-body-small);
    text-align: left;
    margin-top: 0;
    color: var(--text-muted);
}

.status-message.error {
    background: #fee2e2;
    color: #991b1b;
}

.status-message.warning {
    background: #fef3c7;
    color: #92400e;
}

/* ==================== Canvas ==================== */
.canvas-container {
    position: relative;
    background: var(--canvas-bg);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    z-index: 1;

    /* Smooth GPU-accelerated zoom/pan transitions */
    transition: transform 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    will-change: transform;
    transform-origin: center center;
}

/* Full-size mode for 3D preview */
.canvas-container.full-size {
    width: 100%;
    height: 100%;
    flex: 1 1 auto;
    align-self: stretch;
    max-width: 100%;
    max-height: 100%;
    box-shadow: none;
    border-radius: 0;
    background: var(--canvas-bg);
    padding: 0;
}

.canvas-container.full-size #preview3D {
    width: 100%;
    height: 100%;
    background: var(--canvas-bg);
    border-radius: 0;
}

/* Three.js 3D preview container */
.canvas-container.full-size #preview3DThree {
    width: 100%;
    height: 100%;
    background: var(--canvas-bg);
    border-radius: 0;
}

#preview3DThree {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#preview3DThree canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

body.three-d-mode .canvas-area {
    padding: 0;
    background: var(--canvas-bg);
    align-items: stretch;
}

body.three-d-mode .canvas-container {
    border-radius: 0;
}

body.three-d-mode .canvas-toolbar {
    bottom: var(--space-2);
    right: var(--space-2);
}

/* Gesture control — skeleton overlay */
.gesture-cam-container {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    z-index: 20;
    width: 120px;
    height: 90px;
    border-radius: 3px;
    overflow: hidden;
    border: 1px solid var(--border-color, rgba(255,255,255,0.08));
    opacity: 0.5;
    transition: opacity 0.4s;
    background: #0a0a09;
}
.gesture-cam-container:hover { opacity: 1; }

/* Gesture legend — bottom-right hint */
.gesture-legend {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    z-index: 20;
    font-size: 0.55rem;
    letter-spacing: 0.04em;
    color: var(--text-secondary, #6b6760);
    text-align: right;
    pointer-events: none;
    opacity: 0.7;
}
.gesture-legend span {
    color: var(--accent, #c4f04e);
}

/* Gesture status — live mode indicator */
.gesture-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 20;
    text-align: right;
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}
.gesture-status.visible { opacity: 0.6; }
.gesture-status-mode {
    font-family: 'Instrument Serif', serif;
    font-style: italic;
    font-size: 0.85rem;
    letter-spacing: 0.03em;
    color: var(--text-primary, #e8e4dc);
}

/* Fullscreen mode - canvas-area fills screen with toolbar visible */
.canvas-area:fullscreen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    position: relative;
}

.canvas-area:-webkit-full-screen {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    background: var(--bg-color);
    position: relative;
}

.canvas-area:-moz-full-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    position: relative;
}

#svgCanvas,
#preview3D {
    display: block;
    border-radius: var(--radius-sm);
}

#preview3D {
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    touch-action: none;
    pointer-events: auto;
    position: relative;
    z-index: 1;
}

#preview3D:active {
    cursor: grabbing;
}

/* ==================== Canvas Toolbar ==================== */
.canvas-toolbar {
    position: absolute;
    bottom: var(--space-2);
    right: var(--space-2);
    display: flex;
    gap: var(--space-1);
    background: var(--panel-bg);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    z-index: 10;
}

.tool-btn {
    width: var(--space-5);
    height: var(--space-5);
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
    border-radius: var(--radius-sm);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.tool-btn:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.tool-btn:active {
    transform: scale(0.95);
}

/* ==================== Scrollbar ==================== */
/* Hide scrollbar - it's obvious you can scroll */
.controls {
    scrollbar-width: none;  /* Firefox */
    -ms-overflow-style: none;  /* IE/Edge */
}

.controls::-webkit-scrollbar {
    display: none;  /* Chrome/Safari/Opera */
}

/* ==================== Responsive ==================== */
/* Mobile/Tablet: Bottom panel (below 1024px) */
@media (max-width: 1023px) {
    .container {
        display: flex;
        flex-direction: column;
    }

    .controls {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: auto;
        max-height: 50vh;
        min-height: auto;
        border-right: none;
        border-bottom: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
        z-index: 100;
        /* Smooth scrolling on touch devices */
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }

    .canvas-area {
        flex: 1;
        padding: var(--space-3);
        padding-bottom: calc(50vh + var(--space-3));
        /* Prevent overscroll bounce on mobile */
        overscroll-behavior: contain;
    }

    /* In 3D mode, fill the visible area above bottom panel */
    body.three-d-mode .canvas-area {
        display: flex;
        align-items: stretch;
        justify-content: stretch;
        padding: 0;
        padding-bottom: 50vh;
    }

    body.three-d-mode .canvas-container {
        width: 100%;
        height: 50vh;
        min-height: 50vh;
        max-height: 50vh;
        display: block;
        position: relative;
    }

    body.three-d-mode .canvas-container.full-size {
        width: 100%;
        height: 50vh;
        min-height: 50vh;
        max-height: 50vh;
    }

    body.three-d-mode #preview3DThree {
        position: absolute;
        top: 0;
        left: 0;
        width: 100% !important;
        height: 100% !important;
    }

    body.three-d-mode #preview3D {
        max-height: 50vh;
        width: 100%;
        height: 50vh;
        object-fit: contain;
    }

    /* Increase touch target sizes for mobile */
    .btn {
        height: 44px;
        min-height: 44px;
    }

    .tool-btn {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
    }

    .select-input,
    .text-input {
        min-height: 44px;
        padding: var(--space-1);
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .select-input {
        padding-right: var(--space-4);
    }

    /* Mobile sliders - larger touch targets */
    .slider {
        height: 16px;
        background: var(--slider-track);
        margin: var(--space-2) 0;
        padding: 0;
        border-radius: 0;
    }

    .slider::-webkit-slider-track {
        background: transparent;
        border-radius: 0;
    }

    .slider::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 40px;  /* Large touch target for mobile */
        height: 40px;
        background: transparent;  /* Invisible but touchable */
        border: none;
        border-radius: 0;
        box-shadow: none;
        outline: none;
        cursor: pointer;
    }

    .slider::-moz-range-track {
        background: transparent;
        border-radius: 0;
    }

    .slider::-moz-range-thumb {
        -moz-appearance: none;
        appearance: none;
        width: 40px;  /* Large touch target for mobile */
        height: 40px;
        background: transparent;  /* Invisible but touchable */
        border: none;
        border-radius: 0;
        box-shadow: none;
        outline: none;
        cursor: pointer;
    }

    .slider::-moz-range-progress {
        background: transparent;
    }


    /* Toggle button touch targets */
    .toggle-btn {
        width: 52px;
        height: 28px;
    }

    .toggle-track {
        border-radius: 1px;
    }

    .toggle-thumb {
        top: 2px;
        left: 2px;
        width: 24px;
        height: 24px;
        border-radius: 1px;
    }

    .toggle-btn.active .toggle-thumb,
    .toggle-btn[aria-pressed="true"] .toggle-thumb {
        left: 26px;
    }

    /* Compass picker: constrain to container on mobile */
    .compass-picker {
        gap: 4px;
    }

    /* Better spacing for mobile */
    .section {
        margin-bottom: var(--space-3);
    }

    .control-group {
        margin-bottom: var(--space-3);
    }

    /* Canvas toolbar positioning for mobile */
    .canvas-toolbar {
        bottom: var(--space-2);
        right: var(--space-2);
        gap: var(--space-0_5);
    }

    body.three-d-mode .canvas-toolbar {
        bottom: var(--space-2);
    }
}

/* ==================== Animations ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeIn 0.3s ease;
}

/* ==================== Theme Toggle ==================== */
.theme-toggle {
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 13px;
    margin: -9px;
    color: var(--text-primary);
    transition: color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    color: var(--text-secondary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform 0.4s ease;
}

.theme-toggle svg path,
.theme-toggle svg circle {
    transition: fill 0.2s ease, stroke 0.2s ease;
}

/* Light mode icon state */
[data-theme="light"] .theme-toggle svg {
    transform: rotate(0deg);
}

[data-theme="dark"] .theme-toggle svg {
    transform: rotate(180deg);
}

[data-theme="light"] .theme-toggle,
[data-theme="dark"] .theme-toggle {
    color: var(--text-primary);
}

/* ==================== Authentication UI ==================== */

.auth-btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: var(--font-body-small);
    cursor: pointer;
    transition: var(--transition);
    margin-left: var(--space-1);
}

.auth-btn-secondary:hover {
    background: var(--bg-color);
    border-color: var(--text-secondary);
}

.user-email {
    font-size: var(--font-body-small);
    color: var(--text-muted);
    display: block;
    margin-top: var(--space-1);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-plan {
    font-size: 10px;
    font-weight: var(--weight-semibold);
    padding: 2px 8px;
    border-radius: 1px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.user-plan.free {
    background: var(--border-color);
    color: var(--text-secondary);
}

.user-plan.pro {
    background: #fef3c7;
    color: #92400e;
}

/* ==================== Paywall Modal ==================== */
.paywall-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.paywall-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.paywall-content {
    position: relative;
    background: var(--panel-bg);
    padding: var(--space-5);
    border-radius: 1px;
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    text-align: center;
    z-index: 1;
}

.paywall-close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    background: transparent;
    border: none;
    font-size: 32px;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.paywall-close:hover {
    color: var(--text-primary);
}

.paywall-group {
    margin-bottom: var(--space-4);
}

.paywall-group:last-of-type {
    margin-bottom: 0;
}

.paywall-content h2 {
    margin: 0 0 var(--space-1) 0;
    font-size: 24px;
    color: var(--text-primary);
}

.paywall-content p {
    margin: 0;
    color: var(--text-secondary);
}

.paywall-features {
    text-align: left;
    margin: 0;
    line-height: 0;
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-2) 0;
}

.feature-icon {
    width: 20px;
    height: 20px;
    color: var(--success-color);
    flex-shrink: 0;
}

.paywall-pricing {
    font-size: 20px;
    margin: 0;
    padding: var(--space-3);
    background: var(--bg-color);
    border-radius: var(--radius);
    line-height: 1.2;
}

.paywall-pricing strong {
    color: var(--text-primary);
    font-weight: var(--weight-bold);
}

.paywall-upgrade-btn {
    width: 100%;
    background: var(--text-primary);
    color: var(--bg-color);
    border: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    font-size: var(--font-h2);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: var(--transition);
    margin: var(--space-2) 0;
}

.paywall-upgrade-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* Mobile responsiveness for paywall */
@media (max-width: 768px) {
    .paywall-content {
        padding: var(--space-3);
    }


    .auth-btn-secondary {
        margin-left: 0;
    }
}

/* ==================== Canvas Protection ==================== */
.protection-message {
    position: fixed;
    bottom: var(--space-4);
    right: var(--space-4);
    background: var(--panel-bg);
    padding: var(--space-3);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    animation: slideInUp 0.3s ease;
}

.protection-message.fade-out {
    animation: fadeOut 0.3s ease;
    opacity: 0;
}

.protection-message-content h3 {
    margin: 0 0 var(--space-1) 0;
    font-size: var(--font-h2);
    color: var(--text-primary);
}

.protection-message-content p {
    margin: 0 0 var(--space-2) 0;
    color: var(--text-secondary);
    font-size: var(--font-body);
}

.protection-message-content button {
    width: 100%;
    background: var(--text-primary);
    color: var(--bg-color);
    border: none;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-body);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: var(--transition);
}

.protection-message-content button:hover {
    background: var(--secondary-color);
}

@keyframes slideInUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

/* ==================== Variant Gallery ==================== */

.variant-gallery {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    z-index: 50;
    padding: var(--space-3);
    overflow-y: auto;
    animation: fadeIn 0.2s ease;
}

.variant-grid {
    display: grid;
    grid-template-columns: repeat(var(--variant-cols, 3), 1fr);
    gap: var(--space-2);
    flex: 1;
}

.variant-card {
    position: relative;
    aspect-ratio: 1 / 1;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
    background: var(--canvas-bg);
}

.variant-card:hover {
    border-color: var(--accent-color);
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.variant-card:focus-visible {
    outline: none;
}

.variant-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.variant-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-0_5) var(--space-1);
    font-size: var(--font-body-small);
    font-weight: var(--weight-medium);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(4px);
    text-align: center;
}

[data-theme="dark"] .variant-label {
    background: rgba(26, 26, 26, 0.85);
}

/* Batch Export Modal */

.batch-export-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.batch-export-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.batch-export-content {
    position: relative;
    background: var(--panel-bg);
    border-radius: var(--radius);
    padding: var(--space-3);
    max-width: 360px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.batch-export-content h3 {
    margin: 0 0 var(--space-1) 0;
    font-size: var(--font-h2);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
}

.batch-export-content p {
    margin: 0 0 var(--space-2) 0;
    font-size: var(--font-body);
    color: var(--text-secondary);
}

.batch-export-formats {
    display: flex;
    gap: var(--space-1);
    justify-content: center;
    margin-bottom: var(--space-2);
}

.batch-format-btn {
    flex: 1;
}

.batch-export-progress {
    margin-bottom: var(--space-2);
}

.batch-export-cancel {
    width: 100%;
}

/* Mobile variant gallery */
@media (max-width: 1023px) {
    .variant-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-1);
    }

    /* Center lone last card when odd count in 2-col grid */
    .variant-card:last-child:nth-child(odd) {
        grid-column: 1 / -1;
        max-width: 50%;
        justify-self: center;
    }

    .variant-gallery {
        padding: var(--space-2);
    }
}