:root {
    --bg-color-main: #0a0a0f;
    --text-primary: #f0f0f5;
    --text-secondary: #9aa0a6;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --accent-glow: rgba(120, 160, 255, 0.15);
}

.light-theme {
    --bg-color-main: #f8f9fc;
    --text-primary: #1a1a2e;
    --text-secondary: #5e6573;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --accent-glow: rgba(0, 50, 255, 0.05);
}

[v-cloak] {
    display: none;
}

#app {
    min-height: 100vh;
    background-color: var(--bg-color-main);
    color: var(--text-primary);
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                color 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background-color: var(--bg-color-main); /* Fallback */
}

.download-preview-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.download-preview-content {
    width: 100%;
    max-width: 500px;
    background: #111115;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: #fff;
    font-family: 'Outfit', sans-serif;
}

.close-preview-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
}

.preview-hint {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.preview-hint strong {
    color: var(--accent-primary);
}

.preview-image-container {
    width: 100%;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.preview-image-container img {
    width: 100%;
    display: block;
    height: auto;
    /* Ensure long-press works */
    touch-action: auto;
    -webkit-touch-callout: default;
}

.preview-done-btn {
    width: 100%;
    padding: 0.85rem;
    background: var(--accent-primary);
    color: #000;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
}

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

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

/* Light Theme overrides for preview */
.light-theme .download-preview-content {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.1);
}

.light-theme .preview-header h3 { color: #1a1a2e; }
.light-theme .preview-hint { color: #555; }

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 500;
}

.app-header-local {
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    background: radial-gradient(ellipse at top, var(--accent-glow), transparent 60%);
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 2rem;
}

.section-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.section-divider {
    border: 0;
    border-top: 1px solid var(--glass-border);
    margin: 1.5rem 0;
}

.modern-upload-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    padding: 1.25rem;
    border-radius: 14px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.modern-upload-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: 0.5s;
}

.modern-upload-btn:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2), 0 0 15px var(--accent-glow);
}

.modern-upload-btn:hover::before {
    left: 100%;
}

.modern-upload-btn svg {
    color: #78a0ff; /* Soft blue icon */
    transition: transform 0.3s ease;
}

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

.light-theme .modern-upload-btn {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    color: #1a1a2e;
}

.light-theme .modern-upload-btn:hover {
    background: #fbfbfc;
    border-color: rgba(0, 0, 0, 0.15);
    box-shadow: 0 8px 16px rgba(0,0,0,0.06);
}

.workspace-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.expand-toggle-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.expand-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.image-workspace-sidebar {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.expand-view-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
}

.main-extraction-card {
    grid-column: 1 / -1;
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
    max-width: 100%; /* Force constraint within viewport */
    overflow: hidden; /* Ensure content doesn't bleed out */
    box-sizing: border-box;
}

.extraction-workspace {
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 2rem;
    min-height: 400px;
    width: 100%;
    overflow: auto; /* Correctly capture child overflow */
    box-sizing: border-box;
}

.img-container {
    position: relative;
    display: inline-block;
    touch-action: none;
    border-radius: 8px;
    overflow: hidden;
    user-select: none;
    background: #000;
}

.expanded-container {
    width: 100%;
    max-width: 100%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.expanded-container img {
    max-width: 100%;
    width: 100%;
    height: auto;
    min-width: 0;
}

.selection-box {
    position: absolute;
    border: 2px dashed #00ffcc;
    background-color: rgba(0, 255, 204, 0.2);
    pointer-events: none;
    z-index: 10;
}

.img-container img {
    display: block;
    max-width: 100%;
    height: auto;
    pointer-events: none;
}

#selection-box-local {
    position: absolute;
    border: 2px dashed #00ffcc;
    background-color: rgba(0, 255, 204, 0.2);
    pointer-events: none;
    z-index: 10;
}

.instruction-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

.controls-group {
    margin-bottom: 2rem;
}

.theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(8px);
}

.light-theme .theme-toggle {
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.theme-toggle:hover {
    transform: scale(1.05);
    border-color: var(--text-secondary);
}

.header-content-local h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    background: linear-gradient(90deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.light-theme .header-content-local h1 {
    background: linear-gradient(90deg, #1a1a2e, #4a5568);
    -webkit-background-clip: text;
    background-clip: text;
}

.header-content-local p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.dashboard {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: fit-content;
}

.controls-panel h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #fff;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.color-preview {
    height: 120px;
    border-radius: 12px;
    display: flex;
    align-items: flex-end;
    padding: 1rem;
    transition: background-color 0.2s ease;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
}

.color-data {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.light-theme .color-data {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0,0,0,0.1);
    color: #1a1a2e;
}

.light-theme .oklch-value {
    color: #666;
}

.hex-value {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Outfit';
}

.oklch-value {
    font-size: 0.75rem;
    color: #bbb;
    font-family: monospace;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.slider-group .value {
    color: #fff;
    font-variant-numeric: tabular-nums;
    font-family: monospace;
}

.text-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.text-input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.text-input-group input {
    width: 100%;
    padding: 0.75rem;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    color: #fff;
    border-radius: 8px;
    font-family: monospace;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.text-input-group input:focus {
    border-color: rgba(255,255,255,0.4);
    box-shadow: 0 0 12px rgba(255,255,255,0.1);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #333;
    border-radius: 4px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.hue-slider {
    background: linear-gradient(to right, 
        #ff0000 0%, #ffff00 17%, #00ff00 33%, 
        #00ffff 50%, #0000ff 67%, #ff00ff 83%, #ff0000 100%) !important;
}

.dropdown-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.dropdown-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

select {
    width: 100%;
    padding: 0.75rem;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    color: #fff;
    border-radius: 8px;
    font-family: 'Inter';
    outline: none;
    cursor: pointer;
}

select:focus {
    border-color: rgba(255,255,255,0.3);
}

.visualization-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.swatches-container h3, .chart-box h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.chart-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.swatches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.swatch-card {
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.swatch-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.1);
}

.swatch-card.selected-swatch {
    border-color: #fff;
    transform: scale(1.02);
    box-shadow: 0 4px 20px rgba(255,255,255,0.15);
}

.light-theme .swatch-card.selected-swatch {
    border-color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.fine-tune-panel {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    border: 1px dashed var(--glass-border);
}

.light-theme .fine-tune-panel {
    background: rgba(255,255,255,0.5);
}

.fine-tune-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.fine-tune-header h4 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.reset-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: 'Inter';
    transition: background 0.2s;
}

.reset-btn:hover {
    background: rgba(255,255,255,0.1);
}

.swatch-card.focal-point {
    border: 1px solid rgba(255,255,255,0.4);
    box-shadow: 0 0 20px rgba(255,255,255,0.05);
}

.swatch-color {
    height: 100px;
    position: relative;
    transition: background-color 0.2s;
}

.focal-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.light-theme .focal-badge {
    background: rgba(255, 255, 255, 0.9);
    color: #1a1a2e;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.swatch-details {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.swatch-proportion {
    font-size: 1.2rem;
    font-weight: 700;
}

.swatch-hex-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.2rem;
}

.swatch-hex {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.copy-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.4rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

.copy-btn.copied {
    background: rgba(129, 199, 132, 0.2);
    color: #81C784;
    border-color: rgba(129, 199, 132, 0.4);
}

.swatch-apca {
    font-size: 0.8rem;
    font-weight: 600;
}

.apca-label {
    font-size: 0.7rem;
    font-weight: 400;
    opacity: 0.6;
}

/* APCA color coding based on w3c guidelines */
.apca-high { color: #81C784; }
.apca-mid { color: #FFD54F; }
.apca-low { color: #E57373; }

.charts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.chart-box {
    display: flex;
    flex-direction: column;
}

.d3-container {
    flex: 1;
    min-height: 250px;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}
.d3-container svg, .d3-container canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    display: block;
    outline: none;
}

.three-d-box {
    grid-column: 1 / -1;
    min-height: 400px;
}

.three-d-box .d3-container {
    min-height: 350px;
}

/* D3 Chart Styles */
.treemap-node {
    transition: all 0.3s ease;
}
.treemap-node text {
    fill: #fff;
    font-size: 12px;
    font-family: 'Outfit';
    pointer-events: none;
    mix-blend-mode: difference;
}
.tonal-line {
    fill: none;
    stroke: var(--text-secondary);
    stroke-width: 2;
    opacity: 0.6;
}
.tonal-area {
    fill: url(#tonal-gradient);
}
.tonal-point {
    stroke-width: 2;
    transition: all 0.2s ease;
    cursor: ns-resize;
}
.tonal-point:hover {
    r: 25;
    stroke-width: 4;
}
.tonal-point:active, .chroma-point:active {
    stroke: #00ffcc;
}
 
.chroma-line {
    fill: none;
    stroke: var(--text-secondary);
    stroke-width: 2;
    opacity: 0.6;
}
.chroma-area {
    fill: url(#chroma-gradient);
}
.chroma-point {
    stroke-width: 2;
    transition: all 0.2s ease;
    cursor: ns-resize;
}
.chroma-point:hover {
    r: 25;
    stroke-width: 4;
}

.light-theme .tick text {
    fill: #666;
}

.light-theme .treemap-node text {
    mix-blend-mode: normal;
    fill: #000;
    text-shadow: 0 0 4px #fff;
}

@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    .charts-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .main-extraction-card {
        padding: 1.25rem;
        gap: 1rem;
        margin-top: 1.5rem;
    }
    
    .extraction-workspace {
        min-height: 350px;
        padding: 0.8rem;
    }

    .workspace-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .workspace-actions {
        width: 100%;
        justify-content: space-between;
        gap: 0.4rem;
    }

    .modern-upload-btn {
        width: 100%;
        justify-content: center;
    }

    .expand-toggle-btn {
        width: 100%;
        text-align: center;
        padding: 0.8rem;
    }
}

/* Optimization for slim mobile phones */
@media (max-width: 360px) {
    .main-extraction-card {
        padding: 0.8rem;
    }
    
    .extraction-workspace {
        min-height: 300px;
    }

    .expanded-container img {
        min-width: 0;
    }
}

/* AI Prompt Generator Styles */
.prompt-generator-card {
    margin-top: 2rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.03);
}

.prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.prompt-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.6;
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px dashed var(--glass-border);
    margin: 0.5rem 0;
}

.copy-prompt-btn {
    background: var(--accent-primary);
    color: #fff;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-prompt-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 255, 204, 0.3);
}

.copy-prompt-btn.copied {
    background: #81C784;
}

.prompt-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.export-png-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #00ffcc22, #8b5cf622);
    color: rgba(255,255,255,0.9);
    border: 1px solid rgba(0, 255, 204, 0.4);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.export-png-btn:hover {
    background: linear-gradient(135deg, #00ffcc44, #8b5cf644);
    border-color: rgba(0, 255, 204, 0.7);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 255, 204, 0.2);
}

.workspace-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .workspace-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    .expand-view-btn {
        grid-column: span 2;
    }
}

.grayscale-toggle-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.grayscale-toggle-btn:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.35);
    color: #fff;
}

.grayscale-toggle-btn.grayscale-active {
    background: rgba(200, 200, 200, 0.2);
    border-color: rgba(255,255,255,0.5);
    color: #fff;
    box-shadow: 0 0 10px rgba(255,255,255,0.15);
}

.download-bw-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: linear-gradient(135deg, rgba(0, 255, 204, 0.1), rgba(0, 255, 204, 0.05));
    color: #00ffcc;
    border: 1px solid rgba(0, 255, 204, 0.3);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.download-bw-btn:hover {
    background: rgba(0, 255, 204, 0.2);
    border-color: rgba(0, 255, 204, 0.6);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 204, 0.15);
}

.grayscale-badge {
    font-size: 0.72rem;
    font-weight: 600;
    color: rgba(255,255,255,0.5);
    text-align: center;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 3px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 6px;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.light-theme .prompt-text {
    background: rgba(0, 0, 0, 0.05);
    color: #1a1a2e;
}

@media (max-width: 600px) {
    .prompt-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .copy-prompt-btn {
        width: 100%;
    }
}

/* Premium Toggle Switch */
.toggle-control-group {
    margin-top: 1rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    border: 1px solid rgba(255,255,255,0.1);
}

.toggle-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mode-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mode-connected { background: rgba(0, 255, 204, 0.2); color: #00ffcc; }
.mode-detached { background: rgba(255, 255, 255, 0.1); color: #ccc; }

.toggle-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255,255,255,0.1);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

input:checked + .slider { background-color: var(--accent-primary); }
input:focus + .slider { box-shadow: 0 0 1px var(--accent-primary); }
input:checked + .slider:before { transform: translateX(24px); }

.slider.round { border-radius: 24px; }
.slider.round:before { border-radius: 50%; }

/* Graph Interaction Feedback */
.tonal-point {
    transition: stroke 0.2s ease, r 0.2s ease;
}

.tonal-point:hover {
    r: 24;
    stroke: var(--accent-primary);
}

/* ─── Palette Canvas Studio ─────────────────────────────────────────────── */

.canvas-studio-card {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.canvas-controls-row {
    display: flex;
    align-items: flex-end;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.canvas-control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 130px;
}

.canvas-control-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.canvas-brush-group {
    flex: 1;
    min-width: 160px;
}

/* Tool toggle */
.tool-btn-pair {
    display: flex;
    gap: 0;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.tool-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0.55rem 0.9rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.tool-btn + .tool-btn {
    border-left: 1px solid var(--glass-border);
}

.tool-btn.active {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.light-theme .tool-btn.active {
    background: rgba(0, 0, 0, 0.08);
    color: #1a1a2e;
}

.tool-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

/* Undo button */
.canvas-undo-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0.6rem 1.1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 10px;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    align-self: flex-end;
    white-space: nowrap;
}

.canvas-undo-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.canvas-clear-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0.6rem 1.1rem;
    background: rgba(255, 80, 80, 0.08);
    border: 1px solid rgba(255, 80, 80, 0.25);
    color: rgba(255, 120, 120, 0.9);
    border-radius: 10px;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    align-self: flex-end;
    white-space: nowrap;
}

.canvas-clear-btn:hover {
    background: rgba(255, 80, 80, 0.18);
    border-color: rgba(255, 80, 80, 0.5);
    transform: translateY(-1px);
}

/* Download group */
.canvas-download-group {
    display: flex;
    align-items: stretch;
    align-self: flex-end;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 204, 0.3);
}

.canvas-format-select {
    width: auto;
    padding: 0.55rem 0.6rem;
    background: rgba(0, 255, 204, 0.05);
    border: none;
    border-right: 1px solid rgba(0, 255, 204, 0.2);
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.8rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    border-radius: 0;
    outline: none;
}

.canvas-format-select:focus {
    background: rgba(0, 255, 204, 0.1);
}

.canvas-download-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0.55rem 1rem;
    background: rgba(0, 255, 204, 0.08);
    border: none;
    color: #00ffcc;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.canvas-download-btn:hover {
    background: rgba(0, 255, 204, 0.2);
}


/* Colour picker row */
.canvas-color-picker-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.canvas-color-btn {
    position: relative;
    flex: 1;
    min-width: 100px;
    height: 64px;
    border-radius: 12px;
    border: 3px solid transparent;
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    padding: 0.4rem 0.6rem;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
    overflow: hidden;
}

.canvas-color-btn.active {
    border-color: #fff;
    box-shadow: 0 0 0 2px rgba(255,255,255,0.3), 0 6px 20px rgba(0,0,0,0.3);
    transform: translateY(-3px) scale(1.03);
}

.light-theme .canvas-color-btn.active {
    border-color: #1a1a2e;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.15), 0 6px 20px rgba(0,0,0,0.1);
}

.canvas-color-btn:not(.active):hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

.canvas-color-label {
    font-family: monospace;
    font-size: 0.72rem;
    font-weight: 600;
    background: rgba(0,0,0,0.55);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.02em;
    pointer-events: none;
}

.canvas-color-check {
    position: absolute;
    top: 8px;
    right: 8px;
    color: #fff;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.6));
    pointer-events: none;
}

/* Canvas wrapper — aspect ratio managed by JS */
.canvas-wrapper {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: #111;
    box-shadow: inset 0 0 0 1px var(--glass-border), 0 4px 20px rgba(0,0,0,0.3);
    /* aspect-ratio set dynamically by JS */
}

#palette-canvas {
    display: block;
    width: 100%;
    height: 100%;
    image-rendering: pixelated; /* keep crisp at low logical res */
}

/* Pixel stats */
.pixel-stats-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pixel-stats-bar {
    display: flex;
    width: 100%;
    height: 22px;
    border-radius: 8px;
    background: var(--glass-border);
    position: relative;
    overflow: visible;
}

.pixel-stats-segment {
    height: 100%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 0;
}

.pixel-stats-segment:first-child { border-top-left-radius: 8px; border-bottom-left-radius: 8px; }
.pixel-stats-segment:last-child { border-top-right-radius: 8px; border-bottom-right-radius: 8px; }

/* Target Markers */
.pixel-stats-marker {
    position: absolute;
    top: -4px;
    bottom: -4px;
    width: 2px;
    background: #ffffff;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
    z-index: 10;
    pointer-events: auto;
    cursor: help;
    transform: translateX(-50%);
    transition: left 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.pixel-stats-marker::after {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #ffffff;
}

.marker-label {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    color: white;
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.pixel-stats-marker:hover .marker-label {
    opacity: 1;
}

/* Global Reset Button */
.global-reset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.3s;
    margin: 1rem 0 1.5rem 0;
    width: 100%;
}

.global-reset-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.global-reset-btn svg {
    transition: transform 0.5s ease;
}

.global-reset-btn:hover svg {
    transform: rotate(180deg);
}

/* Auto Spread Button */
.auto-spread-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(120, 160, 255, 0.1);
    border: 1px solid rgba(120, 160, 255, 0.2);
    backdrop-filter: blur(8px);
    border-radius: 10px;
    color: #78a0ff;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 1rem;
    width: 100%;
}

.auto-spread-btn:hover {
    background: rgba(120, 160, 255, 0.2);
    border-color: rgba(120, 160, 255, 0.5);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(120, 160, 255, 0.2);
}

.auto-spread-btn svg {
    transition: transform 0.3s ease;
}

.auto-spread-btn:hover svg {
    transform: scale(1.1) translateY(1px);
}

.light-theme .auto-spread-btn {
    background: rgba(0, 80, 255, 0.05);
    border-color: rgba(0, 80, 255, 0.1);
    color: #0050ff;
}

.light-theme .auto-spread-btn:hover {
    background: rgba(0, 80, 255, 0.1);
    border-color: rgba(0, 80, 255, 0.2);
}

/* Blur Tool Actions */
.canvas-blur-group {
    flex: 1;
}

.blur-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.blur-apply-btn, .blur-cancel-btn {
    flex: 1;
    padding: 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.blur-apply-btn {
    background: var(--accent-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #000;
    box-shadow: 0 2px 10px rgba(0, 255, 204, 0.2);
}

.blur-apply-btn:hover:not(:disabled) {
    background: #ffffff;
    color: #000;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.blur-apply-btn:disabled {
    opacity: 0.35;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.3);
    border-color: transparent;
    cursor: not-allowed;
    box-shadow: none;
}


.blur-cancel-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

.blur-cancel-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}



/* Composition Guides */
.canvas-wrapper {
    position: relative;
}

.canvas-guides-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.guide-v, .guide-h {
    position: absolute;
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.guide-v { width: 1px; top: 0; bottom: 0; border-left: 1px dashed rgba(255, 255, 255, 0.4); background: none; }
.guide-h { height: 1px; left: 0; right: 0; border-top: 1px dashed rgba(255, 255, 255, 0.4); background: none; }

/* Rule of Thirds */
.guides-thirds .guide-v-1 { left: 33.333%; }
.guides-thirds .guide-v-2 { left: 66.666%; }
.guides-thirds .guide-h-1 { top: 33.333%; }
.guides-thirds .guide-h-2 { top: 66.666%; }

/* Golden Ratio (~38.2 / 61.8) */
.guides-golden .guide-v-1 { left: 38.2%; }
.guides-golden .guide-v-2 { left: 61.8%; }
.guides-golden .guide-h-1 { top: 38.2%; }
.guides-golden .guide-h-2 { top: 61.8%; }

/* Quadrants */
.guides-quadrants .guide-v-1 { left: 50%; }
.guides-quadrants .guide-v-2 { display: none; }
.guides-quadrants .guide-h-1 { top: 50%; }
.guides-quadrants .guide-h-2 { display: none; }


.pixel-stats-labels {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.pixel-stat-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.82rem;
}

.pixel-stat-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 1px solid rgba(255,255,255,0.2);
}

.pixel-stat-hex {
    font-family: monospace;
    color: var(--text-secondary);
}

.pixel-stat-pct {
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

/* Responsive — tablet */
@media (max-width: 768px) {
    .canvas-controls-row {
        gap: 0.85rem;
    }
    .canvas-control-group {
        min-width: 110px;
    }
    .canvas-color-btn {
        height: 52px;
        min-width: 80px;
    }
}

/* Responsive — mobile */
@media (max-width: 480px) {
    .canvas-controls-row {
        flex-direction: column;
        align-items: stretch;
    }
    .canvas-control-group,
    .canvas-tool-group,
    .canvas-brush-group {
        min-width: 0;
        width: 100%;
    }
    .canvas-clear-btn {
        width: 100%;
        justify-content: center;
        align-self: auto;
    }
    .canvas-color-picker-row {
        gap: 0.6rem;
    }
    .canvas-color-btn {
        height: 56px;
        min-width: 0;
    }
    .pixel-stats-labels {
        gap: 0.75rem;
    }
}

/* Slim mobile (360px) */
@media (max-width: 380px) {
    .canvas-color-btn {
        height: 48px;
    }
    .canvas-color-label {
        font-size: 0.65rem;
    }
}

/* Stencil Selector */
.stencil-selector-section {
    padding: 1rem 0;
    border-top: 1px solid var(--glass-border);
    margin-bottom: 1rem;
}

.stencil-actions-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.stencil-upload-btn {
    background: rgba(120, 160, 255, 0.1);
    border: 1px solid rgba(120, 160, 255, 0.3);
    color: #78a0ff;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.stencil-upload-btn:hover {
    background: rgba(120, 160, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(120, 160, 255, 0.2);
}

.stencil-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-style: italic;
}

.user-stencil {
    position: relative;
    border: 2px dashed rgba(120, 160, 255, 0.4) !important;
}

.user-stencil-badge {
    position: absolute;
    bottom: 2px;
    right: 2px;
    background: #78a0ff;
    color: #fff;
    font-size: 0.6rem;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: 700;
    text-transform: uppercase;
}

.stencil-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 0.75rem;
    max-height: 320px;
    overflow-y: auto;
    padding: 0.5rem 0.25rem;
    scrollbar-width: thin;
    scrollbar-color: var(--glass-border) transparent;
}

.stencil-grid::-webkit-scrollbar {
    width: 6px;
}

.stencil-grid::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 3px;
}


.stencil-item {
    width: auto;
    height: 84px;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stencil-item img {
    max-width: 100%;
    max-height: 100%;
    filter: invert(1) opacity(0.7);
}

.light-theme .stencil-item img {
    filter: opacity(0.7);
}
/* Canvas AI Prompt Section */
.canvas-prompt-section {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px dashed var(--glass-border);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.canvas-prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.canvas-prompt-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.copy-canvas-prompt-btn {
    padding: 0.45rem 0.85rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-canvas-prompt-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.copy-canvas-prompt-btn.copied {
    background: rgba(0, 255, 204, 0.15);
    border-color: rgba(0, 255, 204, 0.4);
    color: #00ffcc;
}

.canvas-prompt-text {
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    font-style: italic;
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 10px;
    margin: 0;
    border-left: 3px solid var(--accent-primary);
}

.stencil-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.stencil-item.active {
    background: rgba(255, 255, 255, 0.15);
    border-color: #00ffcc;
    box-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
}

.stencil-item.active img {
    filter: invert(1) opacity(1);
}

.stencil-item img {
    display: block;
    width: auto;
    height: 100%;
    object-fit: contain;
}