/* CSS Variables */
:root {
    /* Light theme - clean and modern like Image Tools */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9fa;
    --text-primary: #333333;
    --text-secondary: #6c757d;
    --text-muted: #495057;
    --border-color: #e9ecef;
    --border-light: #dee2e6;
    --accent-primary: #007bff;
    --accent-secondary: #0056b3;
    --accent-orange: #fd7e14;
    --success: #28a745;
    --success-hover: #218838;
    --gray: #6c757d;
    --gray-hover: #5a6268;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-light: 0 1px 4px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0, 123, 255, 0.3);
}

[data-theme="dark"] {
    /* Dark theme - cosmic dark like Tweakpane */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --border-color: #404040;
    --border-light: #333333;
    --accent-primary: #4a9eff;
    --accent-secondary: #3a7bd5;
    --accent-orange: #ff8c42;
    --success: #27ae60;
    --success-hover: #229954;
    --gray: #7f8c8d;
    --gray-hover: #6c7b7d;
    --shadow: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-light: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-hover: 0 6px 20px rgba(74, 158, 255, 0.3);
}

/* Dark theme overrides */
[data-theme="dark"] .app-header {
    background: var(--bg-secondary);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .mode-switch {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

[data-theme="dark"] .mode-btn {
    color: var(--text-secondary);
}

[data-theme="dark"] .mode-btn.active {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .mode-btn:hover:not(.active) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .theme-toggle {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .magnifier-toggle {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .magnifier-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .magnifier-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

[data-theme="dark"] .magnifier-toggle.active:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

/* Support button */
.support-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--accent-orange);
    color: white;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 32px;
}

.support-btn:hover {
    background: var(--accent-orange);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.support-btn:active {
    transform: translateY(0);
}

/* Dark theme overrides for support button */
[data-theme="dark"] .support-btn {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
    color: white;
}

[data-theme="dark"] .support-btn:hover {
    background: var(--accent-orange);
    box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .download-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .download-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .copy-btn {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

[data-theme="dark"] .copy-btn:hover:not(:disabled) {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

[data-theme="dark"] .reset-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .reset-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
}

[data-theme="dark"] .reset-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    transition: background 0.3s ease;
}

/* App container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.app-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    color: var(--text-primary);
    margin: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Main content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 300px 1fr 1fr;
    gap: 20px;
    flex: 1;
    width: 100%;
    align-items: start;
    overflow-x: hidden; /* Prevent horizontal scroll on smaller screens */
}

/* Panel styles */
.settings-panel,
.image-panel,
.result-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}

.panel-header {
    background: var(--bg-secondary);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

/* Settings panel */
.settings-container {
    padding: 20px;
    flex: 1;
}

/* Mode switch */
.mode-switch {
    display: flex;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2px;
}

.mode-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.mode-btn.active {
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.mode-btn:hover:not(.active) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Theme toggle */
.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.15s ease;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Magnifier toggle */
.magnifier-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.15s ease;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.magnifier-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.magnifier-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.magnifier-toggle.active:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

/* Tweakpane customization */
#tweakpane-container,
#result-tweakpane-container {
    flex: 1;
}

/* Image panel */
.image-container {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Upload area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--bg-secondary);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.upload-area.drag-over {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.upload-content {
    max-width: 200px;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.6;
}

.upload-content p {
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.upload-hint {
    font-size: 0.8rem !important;
    opacity: 0.7;
}

/* Image display */
.image-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    text-align: center;
}

.image-wrapper {
    position: relative;
    display: block;
    width: 100%;
}

#original-image {
    max-width: 100%;
    max-height: 600px;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.reset-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    backdrop-filter: blur(4px);
}

.reset-btn:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

/* Process button */
.process-btn {
    padding: 10px 20px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.875rem;
    line-height: 1.25rem;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.process-btn:hover:not(:disabled) {
    background: var(--accent-secondary);
}

.process-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Result panel */
.result-container {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 200px;
}

.placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.placeholder p {
    font-size: 0.9rem;
}

/* Download button */
.download-btn {
    padding: 10px 20px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.875rem;
    line-height: 1.25rem;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.download-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Action buttons container */
.action-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 16px;
}

/* Copy button */
.copy-btn {
    padding: 10px 20px;
    background: var(--accent-primary);
    color: white;
    border: 1px solid var(--accent-primary);
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.875rem;
    line-height: 1.25rem;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover:not(:disabled) {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.copy-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Result image */
.result-image {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin-bottom: 8px;
    width: 100%;
}

.result-image img {
    border-radius: 6px;
    box-shadow: var(--shadow-light);
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

/* Image size info */
.image-size-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 8px;
    font-family: 'Courier New', monospace;
}

/* Processing info */
.processing-info {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 16px;
    font-family: 'Courier New', monospace;
    opacity: 0.8;
}

/* Palette */
.palette {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.palette-color {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: transform 0.15s ease;
    box-shadow: var(--shadow-light);
}

.palette-color:hover {
    transform: scale(1.1);
}

/* SVG result */
.result-svg {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 16px;
    width: 100%;
    flex-grow: 1;
}

.result-svg svg {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 600px;
    border-radius: 6px;
    box-shadow: var(--shadow-light);
}

/* Responsive design */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 280px 1fr 1fr;
        gap: 16px;
    }
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr 1fr;
    }
    
    .settings-panel {
        order: 1;
    }
    
    .image-panel {
        order: 2;
    }
    
    .result-panel {
        order: 3;
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 16px;
    }
    
    .app-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding: 12px 16px;
    }
    
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .header-controls {
        gap: 8px;
    }
    
    .mode-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    
    .panel-header {
        padding: 12px 16px;
    }
    
    .settings-container,
    .image-container,
    .result-container {
        padding: 16px;
    }
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Tweakpane custom styles */
.tp-lblv_l {
    font-weight: 500 !important;
}

.tp-lblv_v {
    font-size: 0.9rem !important;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
} 

.result-tweakpane-container .tp-dfwv .tp-pkv {
    position: relative;
    z-index: 100;
}

/* Allow Tweakpane color picker popup to overflow its container */
.result-tweakpane-container .tp-rotv,
.result-tweakpane-container .tp-dfwv {
    overflow: visible !important;
}

/* Ensure the popup is on top */
.tp-popv {
    z-index: 1000;
} 

.image-hint {
    font-size: 0.85rem;
    color: var(--accent-orange);
    background: none;
    margin-top: 4px;
    margin-bottom: 8px;
    text-align: center;
    font-family: inherit;
    line-height: 1.4;
    opacity: 0.95;
    padding: 0 8px;
    word-break: break-word;
}

[data-theme="dark"] .image-hint {
    color: var(--accent-orange);
    opacity: 0.92;
} 

/* Preset controls */
.preset-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 16px;
}

.preset-selector {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 120px;
}

.preset-selector:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.preset-btn {
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.preset-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-light);
}

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

/* Dark theme overrides for preset controls */
[data-theme="dark"] .preset-selector {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .preset-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .preset-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}