:root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --accent-color: #00f2fe;
    --card-bg: #111111;
    --border-color: #333333;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
}

.mono-nav {
    border-bottom: 2px solid var(--text-color);
    padding: 20px 0;
}

.mono-btn {
    background: transparent;
    border: 2px solid var(--text-color);
    color: var(--text-color);
    border-radius: 0;
    padding: 10px 25px;
    font-weight: 600;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.mono-btn:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0;
    margin-bottom: 20px;
}

.card-header {
    background-color: #222;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

pre {
    background-color: #111;
    color: #eee;
    padding: 15px;
    border-left: 4px solid var(--text-color);
    overflow-x: auto;
}

.sidebar {
    height: 100vh;
    border-right: 1px solid var(--border-color);
    padding-top: 20px;
    position: sticky;
    top: 0;
}

.sidebar a {
    color: #999;
    text-decoration: none;
    display: block;
    padding: 8px 0;
    transition: color 0.2s;
}

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

.hero {
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

.highlight-box {
    border: 2px dashed var(--border-color);
    padding: 30px;
    margin: 40px 0;
    text-align: center;
}

.lang-switch {
    cursor: pointer;
    text-decoration: underline;
}

[data-lang="id"] { display: none; }
[data-lang="en"] { display: block; }

body.lang-id [data-lang="id"] { display: block; }
body.lang-id [data-lang="en"] { display: none; }