:root{
  --bg:#0f1720;
  --bg-soft:#0b1220;
  --panel:#111418;
  --muted:#94a3b8;
  --text:#e6eef6;
  --accent:#3b82f6;
  --border:rgba(255,255,255,0.08);
}

*{box-sizing:border-box}

html,body{height:100%}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  background:linear-gradient(180deg,#07101a,#0f1720);
  color:var(--text);
}

#app{
  display:grid;
  grid-template-columns:320px 1fr;
  height:100vh;
  transition:grid-template-columns .2s ease;
}

body.sidebar-collapsed #app{grid-template-columns:0 1fr}
body.sidebar-collapsed #sidebar{padding:0;border-right:0;overflow:hidden}

#sidebar{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  padding:18px;
  overflow:auto;
  border-right:1px solid rgba(255,255,255,0.05);
  backdrop-filter:blur(6px);
}

#sidebar .brand{display:flex;flex-direction:column;align-items:center;gap:8px;padding-bottom:8px}
#sidebar .brand-logo img{width:140px;height:auto;object-fit:contain;display:block}
#sidebar .brand-title{font-size:17px;color:var(--muted);font-weight:700;letter-spacing:0.2px;text-align:center}

#sidebar .folder{margin:6px 0}
#sidebar .folder > .name{
  font-weight:600;
  cursor:pointer;
  padding:6px 8px;
  border-radius:6px;
  color:#d8e8ff;
}
#sidebar .folder > .name:hover{background:rgba(255,255,255,0.04)}
#sidebar .folder > .name.collapsed::after{content:' ▸';float:right}
#sidebar .folder > .name::after{content:' ▾';float:right}

#sidebar .file{
  padding:8px 10px;
  margin:6px 0;
  border-radius:8px;
  color:var(--muted);
  cursor:pointer;
  transition:all .12s ease;
}
#sidebar .file:hover{transform:translateX(2px);background:rgba(255,255,255,0.04);color:#fff}
.file.selected{
  background:linear-gradient(90deg,rgba(59,130,246,0.18),transparent);
  color:#fff;
  border-left:3px solid var(--accent);
  padding-left:7px;
}

#content{display:flex;flex-direction:column;overflow:hidden;min-width:0}
#content header{
  position:sticky;
  top:0;
  z-index:20;
  padding:10px 12px;
  border-bottom:1px solid rgba(255,255,255,0.05);
  background:linear-gradient(180deg,rgba(7,16,26,0.95),rgba(7,16,26,0.82));
  backdrop-filter:blur(6px);
}

#docTopBar{display:flex;align-items:center;gap:10px;margin-bottom:8px}
#toggleSidebar{
  border:1px solid var(--border);
  background:transparent;
  color:var(--muted);
  border-radius:8px;
  padding:5px 9px;
  cursor:pointer;
}
#toggleSidebar:hover{color:#fff;border-color:rgba(255,255,255,0.2)}
#docTitle{
  min-width:0;
  font-weight:600;
  color:#dbeafe;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

#searchWrap{display:flex;gap:8px;align-items:center;width:100%}
#search{
  flex:1;
  min-width:120px;
  padding:9px 10px;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--bg-soft);
  color:#fff;
}
#search:focus{outline:none;border-color:rgba(59,130,246,0.8);box-shadow:0 0 0 3px rgba(59,130,246,0.2)}

#searchControls{display:flex;gap:6px;align-items:center}
#searchControls button{
  background:transparent;
  border:1px solid var(--border);
  color:var(--muted);
  padding:6px 8px;
  border-radius:6px;
  cursor:pointer;
}
#searchControls button:hover{color:#fff;border-color:rgba(255,255,255,0.2)}
#searchCount{color:var(--muted);font-size:13px;min-width:40px;text-align:right}

#doc{
  width:100%;
  max-width:none;
  margin:0;
  padding:30px clamp(16px,4vw,36px) 40px;
  overflow:auto;
  font-size:15px;
  line-height:1.72;
  color:#d5e8ff;
}

#doc h1,#doc h2,#doc h3,#doc h4{line-height:1.3;scroll-margin-top:90px}
#doc h1{font-size:32px;color:#eaf3ff;margin:0 0 .55em}
#doc h2{font-size:24px;color:#dbeafe;margin:1.1em 0 .55em}
#doc h3{font-size:19px;color:#cfe7ff;margin:1em 0 .45em}
#doc h4{font-size:16px;color:#c0dbfb;margin:.8em 0 .35em}
#doc p{margin:0 0 1em;color:rgba(235,245,255,.92)}
#doc ul,#doc ol{padding-left:1.35rem;margin:.35em 0 1em}
#doc li{margin:.2em 0}

#doc a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}

#doc img{max-width:100%;height:auto;border-radius:10px;box-shadow:0 6px 20px rgba(2,6,23,.45)}
#doc figure{display:flex;justify-content:center;margin:18px 0}
#doc figure img{max-width:min(100%,980px)}

#doc hr{border:0;height:1px;background:linear-gradient(90deg,transparent,#23313a,transparent);margin:22px 0}

#doc table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0;
  display:block;
  overflow-x:auto;
}
#doc th,#doc td{padding:10px;border:1px solid rgba(255,255,255,0.08);text-align:left;vertical-align:top}
#doc thead th{background:rgba(255,255,255,.03);font-weight:700}
#doc tbody tr:nth-child(odd){background:rgba(255,255,255,.01)}

#doc pre{
  position:relative;
  background:#06111a;
  padding:14px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.05);
  overflow:auto;
  margin:14px 0;
}
#doc pre code{color:#e6f2ff;background:transparent;padding:0}
#doc code{background:rgba(255,255,255,.05);padding:2px 6px;border-radius:6px;color:#e6f2ff}

.code-copy{
  position:absolute;
  top:8px;
  right:8px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  color:var(--muted);
  padding:6px 8px;
  border-radius:6px;
  cursor:pointer;
  font-size:13px;
}
.code-copy:hover{color:#fff}

#doc blockquote{
  border-left:4px solid rgba(59,130,246,.35);
  padding:10px 16px;
  color:#cde7ff;
  background:linear-gradient(180deg, rgba(59,130,246,.06), transparent);
  border-radius:6px;
  margin:16px 0;
}

mark.search-hit{background:linear-gradient(180deg, rgba(59,130,246,.33), rgba(59,130,246,.18));padding:0 2px;border-radius:3px}
mark.search-hit.active{outline:2px solid rgba(59,130,246,.45);background:rgba(59,130,246,.34)}

#sidebar,#doc{scrollbar-width:none;-ms-overflow-style:none}
#sidebar::-webkit-scrollbar,#doc::-webkit-scrollbar{display:none;width:0;height:0}

@media (max-width: 960px){
  #app{grid-template-columns:260px 1fr}
}

@media (max-width: 720px){
  #app{grid-template-columns:0 1fr}
  #sidebar{padding:0;border-right:0;overflow:hidden}
  body.sidebar-collapsed #app{grid-template-columns:0 1fr}
}