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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    background-color: var(--background);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

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

h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    letter-spacing: -0.025em;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.color-picker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.color-preview {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.color-preview::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
    border-radius: inherit;
}

.color-preview:hover {
    transform: scale(1.02);
}

#colorInput {
    width: 100px;
    height: 50px;
    padding: 5px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    background: transparent;
}

.color-values {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.value-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--background);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    transition: background-color 0.2s;
}

.value-group:hover {
    background: #f1f5f9;
}

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

.value-group input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: 'SF Mono', 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--card-bg);
}

.copy-btn {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.palette-generator, .color-harmonies {
    grid-column: 1 / -1;
}

.palette-container, .harmonies-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.palette-color {
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.palette-color::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
    border-radius: inherit;
}

.palette-color:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.palette-color span {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Courier New', monospace;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.2s ease;
}

.palette-color:hover span {
    opacity: 1;
    transform: translateY(0);
}

#generatePalette {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem auto;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

#generatePalette:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#generatePalette:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .color-preview {
        width: 150px;
        height: 150px;
    }
    
    .palette-container, .harmonies-container {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}