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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #1a1a2e;
    background: #fafafa;
    line-height: 1.7;
}

header {
    background: linear-gradient(135deg, #0f3443 0%, #34e89e 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

header h1 a {
    color: white;
    text-decoration: none;
}

header p {
    font-size: 1.2rem;
    opacity: 0.85;
    max-width: 600px;
    margin: 0 auto;
}

nav {
    background: #0f3443;
    padding: 0.8rem 2rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
}

nav a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    margin: 0 1rem;
    font-size: 0.9rem;
    transition: color 0.2s;
}

nav a:hover, nav a.active {
    color: #34e89e;
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Index page cards */
.entries {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.entry-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    border-left: 4px solid #34e89e;
    transition: transform 0.2s;
}

.entry-card:hover {
    transform: translateY(-2px);
}

.entry-card a {
    text-decoration: none;
    color: inherit;
}

.entry-card h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0f3443;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.entry-card .preview {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.entry-card time {
    font-size: 0.85rem;
    color: #888;
}

.entry-card .read-more {
    color: #34e89e;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Post page */
article.post {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
}

article.post h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #0f3443;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

article.post .post-meta {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #f0f0f0;
}

article.post h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    color: #0f3443;
}

article.post p {
    color: #444;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.tags {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #f0f0f0;
}

.tag {
    display: inline-block;
    background: #e8faf0;
    color: #0f3443;
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-right: 0.4rem;
}

.post-nav {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.post-nav a {
    color: #0f3443;
    text-decoration: none;
    font-weight: 600;
}

.post-nav a:hover {
    color: #34e89e;
}

footer {
    text-align: center;
    padding: 3rem 2rem;
    color: #aaa;
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    header { padding: 3rem 1.5rem; }
    header h1 { font-size: 2.2rem; }
    main { padding: 2rem 1rem; }
    article.post { padding: 1.5rem; }
}