:root {
    --bg:        #0f1115;
    --bg-alt:    #161a21;
    --bg-code:   #1b2027;
    --border:    #262c36;
    --text:      #d5dae2;
    --text-dim:  #8b93a1;
    --gold:      #f5b942;
    --gold-soft: #ffd479;
    --accent:    #ffb038;
    --radius:    10px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.65;
}

body { display: flex; }

/* ---------- Sidebar ---------- */
#sidebar {
    width: 300px;
    flex-shrink: 0;
    height: 100vh;
    position: sticky;
    top: 0;
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 22px 20px 16px;
    border-bottom: 1px solid var(--border);
}
.brand-mark { font-size: 28px; }
.brand-title { font-weight: 700; font-size: 18px; color: var(--gold); }
.brand-sub { font-size: 12px; color: var(--text-dim); letter-spacing: .12em; text-transform: uppercase; }

#search {
    margin: 16px 16px 4px;
    padding: 9px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    outline: none;
}
#search:focus { border-color: var(--gold); }

#nav { padding: 12px 10px; flex: 1; }

.nav-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 12px 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.nav-link {
    display: block;
    padding: 8px 12px 8px 30px;
    margin: 2px 0;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: 14.5px;
    border-left: 2px solid transparent;
    cursor: pointer;
}
.nav-link:hover { background: var(--bg-code); }
.nav-link.active {
    background: rgba(245, 185, 66, .12);
    color: var(--gold-soft);
    border-left-color: var(--gold);
    font-weight: 600;
}

.sidebar-footer {
    padding: 14px 20px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
}

/* ---------- Content ---------- */
#content {
    flex: 1;
    display: flex;
    gap: 32px;
    padding: 48px 56px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.markdown-body { flex: 1; min-width: 0; max-width: 820px; }
.loading { color: var(--text-dim); }

/* ---------- Table of contents ---------- */
#toc {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 48px;
    align-self: flex-start;
    font-size: 13.5px;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
}
#toc .toc-title {
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 10px;
}
#toc a {
    display: block;
    color: var(--text-dim);
    text-decoration: none;
    padding: 3px 0 3px 10px;
    border-left: 2px solid var(--border);
}
#toc a:hover { color: var(--gold-soft); }
#toc a.h3 { padding-left: 22px; font-size: 12.5px; }
#toc a.active { color: var(--gold-soft); border-left-color: var(--gold); }

/* ---------- Markdown typography ---------- */
.markdown-body h1 {
    font-size: 32px;
    color: var(--gold);
    margin: 0 0 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.markdown-body h2 {
    font-size: 24px;
    margin: 42px 0 14px;
    padding-top: 8px;
    color: var(--gold-soft);
}
.markdown-body h3 { font-size: 19px; margin: 28px 0 10px; color: var(--text); }
.markdown-body h4 { font-size: 16px; margin: 22px 0 8px; color: var(--text); }
.markdown-body p, .markdown-body li { color: var(--text); }
.markdown-body a { color: var(--accent); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 36px 0; }

.markdown-body ul, .markdown-body ol { padding-left: 24px; }
.markdown-body li { margin: 5px 0; }

/* inline code */
.markdown-body :not(pre) > code {
    background: var(--bg-code);
    color: var(--gold-soft);
    padding: 2px 6px;
    border-radius: 5px;
    font-size: 13.5px;
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    border: 1px solid var(--border);
}

/* code blocks */
.markdown-body pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    overflow-x: auto;
    position: relative;
}
.markdown-body pre code {
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    font-size: 13.5px;
    background: none;
    padding: 0;
    border: none;
}
.copy-btn {
    position: absolute;
    top: 8px; right: 8px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    color: var(--text-dim);
    border-radius: 6px;
    font-size: 11px;
    padding: 4px 8px;
    cursor: pointer;
    opacity: 0;
    transition: opacity .15s;
}
.markdown-body pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--gold); border-color: var(--gold); }

/* blockquotes / callouts */
.markdown-body blockquote {
    margin: 18px 0;
    padding: 12px 18px;
    background: var(--bg-alt);
    border-left: 4px solid var(--gold);
    border-radius: 0 8px 8px 0;
    color: var(--text);
}
.markdown-body blockquote p { margin: 6px 0; }

/* tables */
.markdown-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 18px 0;
    font-size: 14.5px;
}
.markdown-body th, .markdown-body td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
}
.markdown-body th { background: var(--bg-alt); color: var(--gold-soft); }
.markdown-body tr:nth-child(even) td { background: var(--bg-alt); }

/* FSC / minecraft color-code demo */
.markdown-body h1 + p, .markdown-body h2 + p { margin-top: 6px; }

/* ---------- Mobile ---------- */
#menu-toggle {
    display: none;
    position: fixed;
    top: 14px; left: 14px;
    z-index: 40;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    color: var(--gold);
    font-size: 20px;
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
}
#backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 25;
}

@media (max-width: 1080px) {
    #toc { display: none; }
    #content { padding: 40px; }
}
@media (max-width: 820px) {
    #menu-toggle { display: block; }
    #sidebar {
        position: fixed;
        z-index: 30;
        transform: translateX(-100%);
        transition: transform .22s ease;
    }
    body.nav-open #sidebar { transform: translateX(0); }
    body.nav-open #backdrop { display: block; }
    #content { padding: 64px 22px 40px; }
}