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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: #ffffff;
    padding: 2rem;
}

main {
    max-width: 720px;
    margin: 0 auto;
}

header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid #1a1a1a;
}

h1 {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.25rem;
    color: #525252;
    font-weight: 500;
}

section {
    margin-bottom: 4rem;
}

h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

p {
    margin-bottom: 1.25rem;
    color: #525252;
    font-size: 1.05rem;
}

a {
    color: #0066ff;
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.15s ease;
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: #525252;
}

ul li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #0066ff;
    font-weight: bold;
}

footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 2px solid #e5e5e5;
    text-align: center;
}

.gallery, .design-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery img, .design-grid img {
    width: 100%;
    height: auto;
    border: 2px solid #e5e5e5;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.gallery img:hover, .design-grid img:hover {
    transform: scale(1.02);
    border-color: #0066ff;
}

.design-grid a {
    display: block;
    border: none;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background: #0a0a0a;
        color: #fafafa;
    }
    
    header {
        border-bottom-color: #fafafa;
    }
    
    p, ul li {
        color: #a3a3a3;
    }
    
    .subtitle {
        color: #a3a3a3;
    }
    
    a {
        color: #3b82f6;
    }
    
    footer {
        border-top-color: #262626;
    }
    
    .gallery img, .design-grid img {
        border-color: #262626;
    }
    
    .gallery img:hover, .design-grid img:hover {
        border-color: #3b82f6;
    }
}