/* ============================================
   Gesture-Based Particle System - Styles
   Clean, minimalist dark theme with glassmorphism
   ============================================ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-glass: rgba(18, 18, 26, 0.9);
    --bg-glass-light: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-hover: rgba(255, 255, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-muted: rgba(255, 255, 255, 0.4);
    --accent: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --accent-secondary: #06ffa5;
    --success: #06ffa5;
    --warning: #ffbe0b;
    --danger: #ff006e;
    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: 0.25s ease;
    --transition-fast: 0.15s ease;
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Canvas Container */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#canvas-container canvas {
    display: block;
}

/* Camera Preview */
#camera-container {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 220px;
    z-index: 100;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transition: opacity var(--transition), transform var(--transition);
}

#camera-container.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

#camera-feed {
    width: 100%;
    height: auto;
    display: block;
    transform: scaleX(-1);
}

#camera-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(-1);
    pointer-events: none;
}

#gesture-indicator {
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.5);
}

#gesture-text {
    font-size: 11px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}

#gesture-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

#gesture-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    border-radius: 2px;
    transition: width 0.15s ease-out, background 0.3s ease;
}

/* ============================================
   Control Panel
   ============================================ */
#control-panel {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 300px;
    max-height: calc(100vh - 40px);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glass);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 100;
    overflow: hidden;
    transition: transform var(--transition);
}

#control-panel.collapsed #panel-content {
    display: none;
}

#panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.2);
}

#panel-header h2 {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

#panel-header h2 svg {
    color: var(--accent);
}

#panel-toggle {
    width: 30px;
    height: 30px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

#panel-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

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

#panel-content {
    padding: 8px;
    overflow-y: auto;
    max-height: calc(100vh - 100px);
}

/* Scrollbar Styling */
#panel-content::-webkit-scrollbar {
    width: 5px;
}

#panel-content::-webkit-scrollbar-track {
    background: transparent;
}

#panel-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

#panel-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ============================================
   Collapsible Sections
   ============================================ */
.control-section {
    margin-bottom: 4px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.control-section.collapsible {
    background: var(--bg-glass-light);
    border: 1px solid var(--border-glass);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.section-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.section-title svg {
    color: var(--accent);
    opacity: 0.8;
}

.section-header .chevron {
    color: var(--text-muted);
    transition: transform var(--transition);
}

.control-section.collapsed .section-header .chevron {
    transform: rotate(-90deg);
}

.section-content {
    padding: 0 14px 14px;
    overflow: hidden;
    transition: max-height var(--transition), padding var(--transition), opacity var(--transition);
    max-height: 500px;
    opacity: 1;
}

.control-section.collapsed .section-content {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
}

/* ============================================
   Pattern Grid
   ============================================ */
#pattern-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.pattern-btn {
    aspect-ratio: 1;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-xs);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 4px;
    transition: all var(--transition);
    overflow: hidden;
}

.pattern-preview {
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pattern-preview svg {
    width: 100%;
    height: 100%;
    transition: transform 0.4s ease;
}

.pattern-btn span {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-weight: 500;
}

.pattern-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass-hover);
    color: var(--text-secondary);
}

.pattern-btn:hover .pattern-preview svg {
    transform: scale(1.1) rotate(5deg);
}

.pattern-btn.active {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow), inset 0 0 20px rgba(0, 212, 255, 0.05);
}

.pattern-btn.active .pattern-preview svg {
    animation: patternPulse 2s ease-in-out infinite;
}

@keyframes patternPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* ============================================
   Color Picker & Presets
   ============================================ */
#color-picker-container {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

#color-picker {
    width: 0;
    height: 0;
    opacity: 0;
    position: absolute;
}

#color-preview {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-xs);
    cursor: pointer;
    border: 2px solid rgba(255, 255, 255, 0.15);
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

#color-preview:hover {
    transform: scale(1.08);
    border-color: rgba(255, 255, 255, 0.3);
}

#color-value {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    background: rgba(0, 0, 0, 0.2);
    padding: 6px 10px;
    border-radius: var(--radius-xs);
}

#preset-colors {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.color-preset {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.color-preset:hover {
    transform: scale(1.15);
    border-color: rgba(255, 255, 255, 0.4);
}

.color-preset.active {
    border-color: white;
    transform: scale(1.1);
    box-shadow: 0 0 12px currentColor;
}

/* Subsections */
.subsection {
    margin-top: 4px;
}

.subsection-label {
    display: block;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

/* Gradient Presets */
#gradient-presets {
    display: flex;
    gap: 6px;
}

.gradient-preset {
    width: 48px;
    height: 28px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xs);
    cursor: pointer;
    padding: 3px;
    background: rgba(0, 0, 0, 0.2);
    transition: all var(--transition);
}

.gradient-preset span {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 4px;
}

.gradient-preset:hover {
    transform: scale(1.05);
    border-color: var(--border-glass-hover);
}

.gradient-preset.active {
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ============================================
   Slider Controls
   ============================================ */
.slider-control {
    margin-bottom: 14px;
}

.slider-control:last-child {
    margin-bottom: 0;
}

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

.slider-header label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.slider-value {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 11px;
    color: var(--accent);
    background: rgba(0, 212, 255, 0.1);
    padding: 3px 8px;
    border-radius: var(--radius-xs);
    font-weight: 500;
}

input[type="range"] {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-glow);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 12px var(--accent-glow);
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px var(--accent-glow);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 4px;
}

.slider-labels span {
    font-size: 9px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   Toggle Rows
   ============================================ */
.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-glass);
}

.toggle-row:last-of-type {
    border-bottom: none;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.toggle-label svg {
    color: var(--text-muted);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 42px;
    height: 24px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transition: var(--transition);
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(18px);
    background: var(--text-primary);
}

/* ============================================
   Button Row
   ============================================ */
.button-row {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 12px;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition);
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass-hover);
    color: var(--text-primary);
}

.action-btn.accent {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--accent);
}

.action-btn.accent:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* ============================================
   Fullscreen Button
   ============================================ */
#fullscreen-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: all var(--transition);
}

#fullscreen-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: scale(1.05);
}

/* ============================================
   Loading Overlay
   ============================================ */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    z-index: 1000;
    transition: opacity 0.5s ease;
}

#loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

#loading-overlay p {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.loader {
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   FPS Counter
   ============================================ */
.fps-counter {
    margin-top: 12px;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-xs);
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
}

#fps-value {
    color: var(--accent);
    font-weight: 600;
}

/* ============================================
   Shortcuts Hint
   ============================================ */
.shortcuts-hint {
    margin-top: 8px;
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xs);
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
}

.shortcuts-hint kbd {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 10px;
}

/* ============================================
   Credit
   ============================================ */
.credit {
    margin-top: 12px;
    padding: 10px;
    text-align: center;
    font-size: 11px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-glass);
}

.credit a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.credit a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* ============================================
   Tutorial Overlay
   ============================================ */
#tutorial-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

#tutorial-overlay.hidden {
    display: none;
}

.tutorial-content {
    text-align: center;
    max-width: 500px;
    padding: 40px;
}

.tutorial-content h2 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 30px;
}

.tutorial-step {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    padding: 16px;
    background: var(--bg-glass-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass);
}

.step-icon {
    color: var(--accent);
    flex-shrink: 0;
}

.tutorial-step p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   Shortcuts Modal
   ============================================ */
#shortcuts-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

#shortcuts-modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 24px;
    min-width: 320px;
    max-width: 90vw;
}

.modal-content h3 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-primary);
    text-align: center;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.shortcut {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.shortcut kbd {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 11px;
    min-width: 24px;
    text-align: center;
}

.shortcut span {
    flex: 1;
}

/* ============================================
   Tooltips
   ============================================ */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.9);
    color: var(--text-primary);
    font-size: 11px;
    white-space: nowrap;
    border-radius: var(--radius-xs);
    margin-bottom: 8px;
    z-index: 1000;
    pointer-events: none;
    animation: tooltipFade 0.2s ease;
}

@keyframes tooltipFade {
    from { opacity: 0; transform: translateX(-50%) translateY(4px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ============================================
   Responsive
   ============================================ */
/* ============================================
   Preset Gallery
   ============================================ */
#preset-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 12px;
}

.preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 6px;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all var(--transition);
}

.preset-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass-hover);
}

.preset-btn.active {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.preset-preview {
    width: 100%;
    height: 20px;
    border-radius: 4px;
}

.preset-btn span:last-child {
    font-size: 9px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#custom-presets-list {
    max-height: 100px;
    overflow-y: auto;
    margin-bottom: 8px;
}

.custom-preset-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xs);
    margin-bottom: 4px;
    cursor: pointer;
    transition: all var(--transition);
}

.custom-preset-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-glass-hover);
}

.custom-preset-item span {
    font-size: 11px;
    color: var(--text-secondary);
}

.custom-preset-item .delete-preset {
    width: 18px;
    height: 18px;
    border: none;
    background: rgba(255, 0, 100, 0.2);
    color: var(--danger);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.custom-preset-item:hover .delete-preset {
    opacity: 1;
}

.preset-actions {
    gap: 4px;
}

.preset-actions .action-btn {
    padding: 8px 10px;
    font-size: 10px;
}

/* ============================================
   Performance Stats
   ============================================ */
.performance-stats {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-xs);
    padding: 10px;
    margin-bottom: 12px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    border-bottom: 1px solid var(--border-glass);
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
}

.stat-value {
    font-size: 11px;
    color: var(--accent);
    font-family: 'SF Mono', Monaco, Consolas, monospace;
}

/* ============================================
   Loading Progress
   ============================================ */
.loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 16px;
}

.loading-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    border-radius: 2px;
    transition: width 0.3s ease;
}

.loading-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
}

.loading-step {
    font-size: 11px;
    color: var(--text-muted);
    opacity: 0.5;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.loading-step::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: all 0.3s ease;
}

.loading-step.active {
    opacity: 1;
    color: var(--accent);
}

.loading-step.active::before {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    animation: pulse 1s ease-in-out infinite;
}

.loading-step.completed {
    opacity: 0.8;
    color: var(--success);
}

.loading-step.completed::before {
    background: var(--success);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* ============================================
   Toast Notifications
   ============================================ */
#toast-container {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastIn 0.3s ease forwards;
    pointer-events: auto;
}

.toast.exiting {
    animation: toastOut 0.3s ease forwards;
}

.toast-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.toast-icon.success { color: var(--success); }
.toast-icon.error { color: var(--danger); }
.toast-icon.info { color: var(--accent); }
.toast-icon.warning { color: var(--warning); }

.toast-message {
    font-size: 13px;
    color: var(--text-primary);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ============================================
   Onboarding Overlay
   ============================================ */
#onboarding-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

#onboarding-overlay.hidden {
    display: none;
}

.onboarding-content {
    max-width: 500px;
    width: 90%;
    padding: 30px;
    text-align: center;
}

.onboarding-header h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.onboarding-header p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.onboarding-steps {
    position: relative;
    min-height: 200px;
}

.onboarding-step {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    text-align: left;
    background: var(--bg-glass-light);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
}

.onboarding-step.active {
    opacity: 1;
    visibility: visible;
}

.onboarding-step-number {
    width: 36px;
    height: 36px;
    background: rgba(0, 212, 255, 0.1);
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    flex-shrink: 0;
}

.onboarding-step-content h3 {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.onboarding-step-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.onboarding-demo {
    margin-top: 16px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: center;
}

.onboarding-demo svg {
    color: var(--accent);
}

.hand-animation {
    width: 60px;
    height: 60px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.6;
}

.hand-animation.open-close {
    animation: openClose 2s ease-in-out infinite;
}

.hand-animation.pinch {
    animation: pinchAnim 2s ease-in-out infinite;
}

.hand-animation.fast-move {
    animation: fastMove 1s ease-in-out infinite;
}

.hand-animation.two-hands {
    animation: twoHands 2s ease-in-out infinite;
}

@keyframes openClose {
    0%, 100% { transform: scale(0.5); opacity: 0.4; }
    50% { transform: scale(1); opacity: 0.8; }
}

@keyframes pinchAnim {
    0%, 100% { transform: scale(1); border-radius: 50%; }
    50% { transform: scale(0.3); border-radius: 10px; box-shadow: 0 0 20px var(--accent); }
}

@keyframes fastMove {
    0%, 100% { transform: translateX(-20px); }
    50% { transform: translateX(20px); }
}

@keyframes twoHands {
    0%, 100% { transform: scaleX(0.5); }
    50% { transform: scaleX(1.5); }
}

.onboarding-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 30px;
}

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

.onboarding-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all var(--transition);
}

.onboarding-dots .dot.active {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.onboarding-dots .dot:hover {
    background: rgba(255, 255, 255, 0.4);
}

.skip-btn {
    margin-top: 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    text-decoration: underline;
    transition: color var(--transition);
}

.skip-btn:hover {
    color: var(--text-secondary);
}

/* ============================================
   Error Screen
   ============================================ */
.error-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    padding: 40px;
    text-align: center;
}

.error-screen svg {
    width: 64px;
    height: 64px;
    color: var(--danger);
    margin-bottom: 20px;
}

.error-screen h2 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.error-screen p {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 400px;
    margin-bottom: 20px;
}

.error-screen .action-btn {
    width: auto;
    padding: 12px 24px;
}

/* ============================================
   High Contrast Mode
   ============================================ */
body.high-contrast {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-glass: rgba(0, 0, 0, 0.95);
    --border-glass: rgba(255, 255, 255, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #dddddd;
    --text-muted: #aaaaaa;
    --accent: #00ffff;
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
    }
}

body.reduced-motion *,
body.reduced-motion *::before,
body.reduced-motion *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    #control-panel {
        width: 100%;
        max-width: none;
        top: auto;
        bottom: 0;
        right: 0;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        max-height: 60vh;
    }

    #control-panel.collapsed {
        transform: translateY(calc(100% - 50px));
    }

    #camera-container {
        width: 140px;
        bottom: auto;
        top: 20px;
        left: 20px;
    }

    #fullscreen-btn {
        bottom: auto;
        top: 20px;
    }

    #pattern-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .button-row {
        flex-direction: column;
    }

    #preset-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .onboarding-step {
        flex-direction: column;
        text-align: center;
    }

    .onboarding-step-number {
        align-self: center;
    }

    #toast-container {
        bottom: 20px;
        width: 90%;
        left: 5%;
        transform: none;
    }
}