:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --accent-color: #0066cc;
    --secondary-text: #666666;
    --border-color: #eaeaea;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --max-width: 740px;
    --spacing: 2rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111111;
        --text-color: #eeeeee;
        --accent-color: #66b3ff;
        --secondary-text: #aaaaaa;
        --border-color: #333333;
    }
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
    font-size: 1.1rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: opacity 0.2s, border-bottom 0.2s;
}

a:hover {
    border-bottom: 1px solid var(--accent-color);
    color: var(--accent-color);
}

.wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Header */
.site-header {
    padding: var(--spacing) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: calc(var(--spacing) * 2);
}

.site-header .wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.site-nav a {
    margin-left: 1.5rem;
    font-size: 0.95rem;
    color: var(--secondary-text);
    transition: color 0.2s;
}

.site-nav a:hover {
    color: var(--text-color);
}

/* Content */
.page-content {
    min-height: 60vh;
    padding-bottom: calc(var(--spacing) * 2);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--text-color);
}

h1 { font-size: 2.5rem; margin-top: 0; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.4rem; }

p { margin-bottom: 1.5rem; }

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li { margin-bottom: 0.5rem; }

blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
    font-style: italic;
    color: var(--secondary-text);
    margin: 2rem 0;
}

pre, code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    font-size: 0.9em;
    background-color: var(--border-color);
    border-radius: 4px;
}

code { padding: 0.2em 0.4em; }

pre {
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

pre code {
    background-color: transparent;
    padding: 0;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}

/* Post List */
.post-list {
    list-style: none;
    padding: 0;
}

.post-list li {
    margin-bottom: 3rem;
}

.post-link {
    font-size: 1.75rem;
    font-weight: 700;
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.post-meta {
    font-size: 0.9rem;
    color: var(--secondary-text);
    margin-bottom: 1rem;
    display: block;
}

.post-excerpt {
    color: var(--secondary-text);
}

/* Footer */
.site-footer {
    padding: var(--spacing) 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.9rem;
    margin-top: auto;
}