:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-bg: #1a1a2e;
    --light-bg: #ffffff;
    --border-color: #e0e0e0;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 2.5em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.lang-selector {
    display: flex;
    gap: 10px;
}

.lang-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background: var(--light-bg);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.lang-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

main {
    display: grid;
    gap: 30px;
}

.picker-section {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.color-display {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.color-preview {
    width: 100%;
    height: 200px;
    border-radius: var(--border-radius);
    background: var(--primary-color);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.color-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.color-format {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-format label {
    width: 50px;
    font-weight: 600;
    color: var(--text-secondary);
}

.color-format input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    background: #f8f9fa;
}

.copy-btn {
    padding: 10px;
    border: none;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.copy-btn:hover {
    background: #2980b9;
    transform: scale(1.1);
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-group label {
    font-weight: 600;
    color: var(--text-secondary);
}

#colorPicker {
    width: 100%;
    height: 50px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

#colorPicker:hover {
    transform: scale(1.02);
}

#imageUpload {
    padding: 10px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    background: #f8f9fa;
    cursor: pointer;
    transition: var(--transition);
}

#imageUpload:hover {
    border-color: var(--primary-color);
    background: #e3f2fd;
}

.sliders {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.slider-group {
    display: grid;
    grid-template-columns: 80px 1fr 50px;
    align-items: center;
    gap: 15px;
}

.slider-group label {
    font-weight: 600;
    color: var(--text-secondary);
}

.slider-group input[type="range"] {
    -webkit-appearance: none;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, #e0e0e0 0%, var(--primary-color) 50%, #e0e0e0 100%);
    outline: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.slider-group span {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    color: var(--text-primary);
}

.palette-section, .image-section, .presets-section {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-lg);
}

h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.8em;
}

.palette-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: #ecf0f1;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #bdc3c7;
    transform: translateY(-2px);
}

.palette-grid, .extracted-colors, .presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 15px;
}

.palette-color, .extracted-color, .preset-color {
    aspect-ratio: 1;
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.palette-color:hover, .extracted-color:hover, .preset-color:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.delete-btn {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #e74c3c;
    color: white;
    border: none;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    font-size: 16px;
    line-height: 1;
}

.palette-color:hover .delete-btn {
    opacity: 1;
}

.preset-color {
    display: flex;
    align-items: center;
    justify-content: center;
}

.preset-color span {
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-family: 'Monaco', 'Courier New', monospace;
    opacity: 0;
    transition: var(--transition);
}

.preset-color:hover span {
    opacity: 1;
}

.image-preview {
    position: relative;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

#uploadedImage {
    width: 100%;
    height: auto;
    display: block;
}

.color-picker-cursor {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid white;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.5);
    display: none;
}

footer {
    text-align: center;
    padding: 30px;
    color: white;
    margin-top: 30px;
}

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--secondary-color);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
    font-weight: 600;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .picker-section {
        grid-template-columns: 1fr;
    }
    
    header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    h1 {
        font-size: 2em;
    }
    
    .palette-grid, .extracted-colors, .presets-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
    
    .slider-group {
        grid-template-columns: 60px 1fr 40px;
    }
}