:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f5f6fa;
    --text-color: #2c3e50;
    --border-color: #dcdde1;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.color-picker {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px var(--shadow-color);
    margin-bottom: 2rem;
}

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

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-tip {
    font-size: 0.9rem;
    color: #666;
    margin-left: 0.5rem;
}

input[type="color"] {
    width: 100%;
    height: 50px;
    padding: 0;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.color-display {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-top: 2rem;
}

.color-preview {
    aspect-ratio: 1;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.color-hex {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem;
    text-align: center;
    font-family: monospace;
    cursor: pointer;
    transition: background-color 0.3s;
}

.color-hex:hover {
    background: rgba(0, 0, 0, 0.9);
}

.color-values {
    display: grid;
    gap: 1.5rem;
}

.value-group {
    background: var(--background-color);
    padding: 1rem;
    border-radius: 5px;
}

.value-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.value-tip {
    font-size: 0.9rem;
    color: #666;
    margin-left: 0.5rem;
}

.input-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 0.5rem;
}

.input-row input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    text-align: center;
}

.pantone-palette {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.pantone-palette h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.palette-tip {
    font-size: 0.9rem;
    color: #666;
    margin-left: 0.5rem;
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.palette-item {
    background: var(--background-color);
    border-radius: 5px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
}

.palette-item:hover {
    transform: translateY(-5px);
}

.palette-color {
    height: 100px;
}

.palette-info {
    padding: 0.5rem;
    text-align: center;
    font-size: 0.9rem;
    background: white;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1rem;
    color: #666;
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .color-display {
        grid-template-columns: 1fr;
    }
    
    .palette-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}