/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d1117;--bg-card:#161b22;--bg-code:#1c2128;--bg-nav:#0d1117;
  --text:#e6edf3;--text-muted:#8b949e;--text-link:#58a6ff;
  --accent:#7c3aed;--accent-light:#a78bfa;--accent-glow:rgba(124,58,237,.25);
  --border:#30363d;--border-light:#484f58;
  --success:#3fb950;--warn:#d29922;--danger:#f85149;
  --font-sans:'Inter',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','Fira Code','Cascadia Code',monospace;
  --sidebar-w:280px;--header-h:64px;
  --radius:8px;--radius-lg:12px;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--text-link);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-light)}
img{max-width:100%;display:block}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);background:rgba(13,17,23,.85);
  backdrop-filter:blur(16px);border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 24px;
}
.header-inner{display:flex;align-items:center;width:100%;max-width:1600px;margin:0 auto;gap:16px}
.logo{font-size:1.35rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:10px}
.logo span{color:var(--accent-light)}
.logo .version{font-size:.7rem;background:var(--accent);color:#fff;padding:2px 8px;border-radius:20px;font-weight:500}
.header-nav{margin-left:auto;display:flex;gap:8px;align-items:center}
.header-nav a{color:var(--text-muted);font-size:.875rem;padding:6px 14px;border-radius:6px;transition:all .2s}
.header-nav a:hover,.header-nav a.active{color:var(--text);background:var(--bg-card)}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:8px}

/* ===== Layout ===== */
.page-wrapper{display:flex;margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}

/* ===== Sidebar ===== */
.sidebar{
  position:fixed;top:var(--header-h);left:0;bottom:0;
  width:var(--sidebar-w);background:var(--bg-nav);border-right:1px solid var(--border);
  overflow-y:auto;padding:24px 0;z-index:50;
  transition:transform .3s ease;
}
.sidebar::-webkit-scrollbar{width:4px}
.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
.sidebar-section{margin-bottom:8px}
.sidebar-section-title{
  font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;
  color:var(--text-muted);padding:8px 24px;
}
.sidebar-link{
  display:block;padding:6px 24px 6px 28px;font-size:.875rem;color:var(--text-muted);
  border-left:3px solid transparent;transition:all .15s;
}
.sidebar-link:hover{color:var(--text);background:rgba(255,255,255,.03)}
.sidebar-link.active{color:var(--accent-light);border-left-color:var(--accent);background:var(--accent-glow)}

/* ===== Main Content ===== */
.main-content{
  flex:1;margin-left:var(--sidebar-w);padding:40px 48px 80px;max-width:900px;
}

/* ===== Hero (index page) ===== */
.hero{text-align:center;padding:80px 0 60px}
.hero h1{font-size:3.2rem;font-weight:800;line-height:1.15;margin-bottom:16px}
.hero h1 .highlight{
  background:linear-gradient(135deg,var(--accent),var(--accent-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.hero .tagline{font-size:1.2rem;color:var(--text-muted);max-width:560px;margin:0 auto 32px}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 28px;border-radius:var(--radius);font-size:.95rem;font-weight:600;
  transition:all .2s;cursor:pointer;border:none;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-light);color:#fff;transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}
.btn-secondary{background:var(--bg-card);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent-light)}

/* Feature cards */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin:48px 0}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px;transition:all .25s;
}
.feature-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.3)}
.feature-card .icon{font-size:1.8rem;margin-bottom:12px}
.feature-card h3{font-size:1.05rem;margin-bottom:6px}
.feature-card p{font-size:.85rem;color:var(--text-muted);line-height:1.6}

/* ===== Typography ===== */
.content-section{margin-bottom:56px}
.content-section > h1{font-size:2rem;font-weight:700;margin-bottom:8px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.content-section > h2{font-size:1.5rem;font-weight:700;margin:40px 0 12px;color:var(--text)}
.content-section > h3{font-size:1.15rem;font-weight:600;margin:28px 0 8px;color:var(--text)}
.content-section > p{margin-bottom:16px;color:var(--text-muted)}
.content-section > ul,.content-section > ol{margin:0 0 16px 20px;color:var(--text-muted)}
.content-section li{margin-bottom:6px}
.content-section strong{color:var(--text)}

/* ===== Code Blocks ===== */
pre{
  background:var(--bg-code);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;overflow-x:auto;margin:16px 0;font-size:.85rem;line-height:1.65;
  position:relative;
}
pre code{font-family:var(--font-mono);color:var(--text)}
code:not(pre code){
  font-family:var(--font-mono);font-size:.85em;
  background:var(--bg-code);padding:2px 7px;border-radius:4px;color:var(--accent-light);
}
.code-label{
  position:absolute;top:8px;right:12px;font-size:.65rem;font-weight:600;
  text-transform:uppercase;color:var(--text-muted);letter-spacing:.06em;
  background:var(--bg);padding:2px 8px;border-radius:4px;
}

/* ===== Tables ===== */
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.875rem}
th{text-align:left;padding:10px 14px;border-bottom:2px solid var(--border);color:var(--text);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text-muted)}
tr:hover td{background:rgba(255,255,255,.02)}

/* ===== Callouts ===== */
.callout{
  padding:16px 20px;border-radius:var(--radius);margin:20px 0;font-size:.875rem;
  border-left:4px solid;display:flex;gap:12px;align-items:flex-start;
}
.callout-icon{font-size:1.2rem;flex-shrink:0;margin-top:1px}
.callout-info{background:rgba(88,166,255,.08);border-color:var(--text-link);color:var(--text-muted)}
.callout-warn{background:rgba(210,153,34,.08);border-color:var(--warn);color:var(--text-muted)}
.callout-success{background:rgba(63,185,80,.08);border-color:var(--success);color:var(--text-muted)}
.callout-danger{background:rgba(248,81,73,.08);border-color:var(--danger);color:var(--text-muted)}

/* ===== API Reference Table ===== */
.api-group{margin:24px 0}
.api-group h3{font-size:1rem;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.api-badge{font-size:.6rem;padding:2px 8px;border-radius:4px;font-weight:700;text-transform:uppercase}
.api-badge.get{background:rgba(63,185,80,.15);color:var(--success)}
.api-badge.post{background:rgba(88,166,255,.15);color:var(--text-link)}
.api-badge.put{background:rgba(210,153,34,.15);color:var(--warn)}
.api-badge.delete{background:rgba(248,81,73,.15);color:var(--danger)}

/* ===== Tabs ===== */
.tabs{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:0}
.tab-btn{
  padding:10px 20px;font-size:.85rem;color:var(--text-muted);background:none;border:none;
  cursor:pointer;border-bottom:2px solid transparent;transition:all .15s;font-family:var(--font-sans);
}
.tab-btn:hover{color:var(--text)}
.tab-btn.active{color:var(--accent-light);border-bottom-color:var(--accent)}
.tab-content{display:none;padding-top:0}
.tab-content.active{display:block}

/* ===== Copy button ===== */
.copy-btn{
  position:absolute;top:8px;right:12px;
  background:var(--bg-card);border:1px solid var(--border);border-radius:4px;
  color:var(--text-muted);font-size:.7rem;padding:4px 10px;cursor:pointer;
  opacity:0;transition:all .2s;font-family:var(--font-sans);
}
pre:hover .copy-btn{opacity:1}
.copy-btn:hover{color:var(--text);border-color:var(--accent)}
.copy-btn.copied{color:var(--success);border-color:var(--success)}

/* ===== Syntax Highlighting (minimal) ===== */
.kw{color:#ff7b72}.str{color:#a5d6ff}.cmt{color:#8b949e;font-style:italic}
.fn{color:#d2a8ff}.tp{color:#79c0ff}.num{color:#79c0ff}.ann{color:#ffa657}
.tag{color:#7ee787}.attr{color:#79c0ff}.punct{color:#8b949e}

/* ===== Footer ===== */
.site-footer{
  border-top:1px solid var(--border);padding:32px 48px;
  margin-left:var(--sidebar-w);color:var(--text-muted);font-size:.8rem;
  display:flex;justify-content:space-between;align-items:center;
}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-content,.site-footer{margin-left:0}
  .menu-toggle{display:block}
}
@media(max-width:640px){
  .hero h1{font-size:2.2rem}
  .main-content{padding:24px 20px 60px}
  .site-footer{padding:24px 20px;flex-direction:column;gap:8px}
  .features-grid{grid-template-columns:1fr}
}