:root {
    --bg-color: #f4f4f4;
    --text-color: #333;
    --accent-color: #0056b3;
    --border-color: #ccc;
    --font-main: 'Courier New', Courier, monospace;
}

body.dark-mode {
    --bg-color: #0d0d0d;
    --text-color: #00ff41;
    --accent-color: #008f11;
    --border-color: #003b00;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--accent-color);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 4px solid var(--text-color);
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

#theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    font-family: var(--font-main);
    background-color: white;
    color: black;
    border: 2px solid black;
}

body.dark-mode #theme-toggle {
    background-color: var(--bg-color);
    color: var(--text-color);
    border-color: var(--text-color);
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

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

#post-list li {
    margin-bottom: 0.5rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    background-color: var(--bg-color);
}

#post-list a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
}

#post-list a:hover {
    color: var(--text-color);
    text-decoration: underline;
}

#post-body {
    line-height: 1.6;
}

#post-body h1, #post-body h2, #post-body h3 {
    color: var(--accent-color);
}

#post-body pre {
    background-color: #eee;
    color: #333;
    padding: 1rem;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

body.dark-mode #post-body pre {
    background-color: #333;
    color: #eee;
}