:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-tertiary: #f0f0f0;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #6a6a6a;
    --border-color: #e0e0e0;
    --accent: #2a2a2a;
    --hover: #3a3a3a;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2e2e2e;
    --text-primary: #f0f0f0;
    --text-secondary: #c0c0c0;
    --text-tertiary: #a0a0a0;
    --border-color: #3a3a3a;
    --accent: #e0e0e0;
    --hover: #d0d0d0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header & Navigation */
header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    font-weight: 400;
}

nav a:hover,
nav a.active {
    color: var(--text-primary);
}

#darkModeToggle {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

#darkModeToggle:hover {
    background-color: var(--bg-secondary);
}

.dark-icon {
    display: none;
}

[data-theme="dark"] .light-icon {
    display: none;
}

[data-theme="dark"] .dark-icon {
    display: inline;
}

/* Main Content */
main {
    max-width: 90%;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Home Page */
.hero {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem 0;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.home-grid {
    display: grid;
    grid-template-columns: 70% 30%;
    gap: 4rem;
}

/* Blog Summary */
.blog-summary h2, 
.gallery-links h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.blog-preview {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
}

.blog-preview:last-child {
    border-bottom: none;
}

.blog-preview time {
    display: block;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.blog-preview h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.blog-preview p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.read-more {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.read-more:hover {
    color: var(--hover);
}

/* Gallery Links */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.gallery-card {
    text-decoration: none;
    display: block;
}

.gallery-thumbnail {
    aspect-ratio: 1;
    background-color: var(--bg-primary);
    background-size: cover;
    background-position: center;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    transition: transform 0.3s ease;
}

.gallery-card:hover .gallery-thumbnail {
    transform: scale(1.02);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 2rem 1.5rem 1.5rem;
}

.gallery-overlay h3 {
    color: white;
    font-size: 1.25rem;
    font-weight: 400;
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.social-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.social-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.social-links a:hover {
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 968px) {
    .home-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    nav ul {
        gap: 1.5rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 640px) {
    header {
        padding: 1rem;
    }
    
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 2rem 1rem;
    }
}