:root {
    --border-color: #d0d7de;
    --sidebar-bg: #f6f8fa;
    --body-bg: #ffffff;
    --text-color: #24292f;
    --link-color: #0969da;
    --code-bg: rgba(175, 184, 193, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    margin: 0;
    background-color: var(--body-bg);
    color: var(--text-color);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding-top: 2rem;
}

.sidebar-header {
    padding: 0 1.5rem 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.sidebar-nav {
    padding: 1.5rem;
}

.sidebar-nav h4 {
    font-size: 0.9rem;
    margin: 0 0 0.5rem 0;
    color: #57606a;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav a {
    display: block;
    padding: 0.5rem 0;
    text-decoration: none;
    color: var(--text-color);
    border-radius: 4px;
    transition: background-color 0.2s;
}

.sidebar-nav a.active {
    font-weight: 600;
    color: var(--link-color);
}

.sidebar-nav a:not(.active):hover {
    text-decoration: underline;
}

.main-content {
    flex-grow: 1;
    padding: 2rem 4rem;
}

.main-content h1 {
    font-size: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
    margin-bottom: 2rem;
    font-weight: 500;
}

.wip-container {
    border: 1px solid #f0b955;
    background-color: #fffbdd;
    color: #3e3000;
    border-radius: 6px;
    padding: 2rem;
    text-align: center;
}

.wip-container .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.wip-container h2 {
    margin-top: 0;
    font-size: 1.8rem;
}

.wip-container p {
    max-width: 600px;
    margin: 1rem auto 0 auto;
    line-height: 1.6;
}

code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-size: 85%;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        height: auto;
    }

    .main-content {
        padding: 2rem;
    }
}