:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4285f4;
    --surface-1: #ffffff;
    --surface-2: #f8f9fa;
    --text-1: #202124;
    --text-2: #5f6368;
    --border: #dadce0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: linear-gradient(45deg, var(--primary), var(--primary-light));
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
}

.color-picker-container {
    max-width: 600px;
    margin: 80px auto;
    padding: 1rem;
    animation: slideUp 0.6s ease-out;
}

.color-picker-box {
    background: var(--surface-1);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
}

.color-picker-box h1 {
    font-size: 24px;
    font-weight: 400;
    color: var(--text-1);
    margin-bottom: 8px;
    text-align: center;
}

.color-picker-box p {
    font-size: 16px;
    color: var(--text-2);
    text-align: center;
    margin-bottom: 2rem;
}

.color-controls {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.color-preview {
    width: 150px;
    height: 150px;
    border-radius: 0.5rem;
    border: 3px solid var(--border);
    transition: border-color 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.color-inputs {
    flex: 1;
}

.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

input[type="color"] {
    width: 60px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

input[type="color"]:hover {
    transform: scale(1.05);
}

input[type="text"] {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.2s ease;
}

input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
    outline: none;
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.slider-group label {
    width: 20px;
    color: var(--text-2);
    font-weight: 500;
}

.slider-group input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--primary-light);
    -webkit-appearance: none;
    appearance: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: transform 0.2s ease;
}

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

.slider-group input[type="number"] {
    width: 60px;
    padding: 0.4rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
}

.color-history h3 {
    color: var(--text-1);
    margin: 2rem 0 1rem;
    font-size: 18px;
    font-weight: 500;
}

.color-swatches {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.color-swatch:hover {
    transform: scale(1.1);
    border-color: var(--primary);
}

.copy-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

@media (max-width: 600px) {
    .color-picker-box {
        padding: 1.5rem;
    }
    
    .color-controls {
        flex-direction: column;
    }

    .color-preview {
        width: 100%;
        height: 100px;
    }
    
    .slider-group {
        margin-bottom: 0.75rem;
    }
}