:root {
  --bg:         #0b0e14;
  --bg-2:       #111520;
  --bg-3:       #161b27;
  --bg-card:    #141922;
  --bg-code:    #0d111a;
  --border:     #1e2535;
  --border-hi:  #2d3855;
  --purple:     #7c3aed;
  --purple-dim: #5b21b6;
  --purple-glow:rgba(124,58,237,0.15);
  --teal:       #0ea5e9;
  --green:      #22c55e;
  --amber:      #f59e0b;
  --red:        #ef4444;
  --pink:       #ec4899;
  --text:       #e2e8f0;
  --text-2:     #94a3b8;
  --text-3:     #64748b;
  --text-code:  #a5b4fc;
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', monospace;
  --radius:     10px;
  --radius-lg:  16px;
  --tr:         0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-sans); font-size: 15px; line-height: 1.6; min-height: 100vh; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--font-mono); }

/* ── LAYOUT ── */
.layout { display: grid; grid-template-columns: 260px 1fr; grid-template-rows: 56px 1fr; min-height: 100vh; }

/* ── TOPBAR ── */
.topbar {
  grid-column: 1 / -1;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
  padding: 0 24px;
  position: sticky; top: 0; z-index: 100;
}
.topbar-logo {
  width: 30px; height: 30px; border-radius: 7px;
  background: linear-gradient(135deg, var(--purple), #a855f7);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 800; color: #fff; flex-shrink: 0;
  letter-spacing: -1px;
}
.topbar-title { font-size: 15px; font-weight: 600; color: var(--text); letter-spacing: -0.01em; }
.topbar-sub   { font-size: 12px; color: var(--text-3); }
.topbar-badge {
  margin-left: auto;
  background: var(--purple-glow);
  border: 1px solid var(--purple-dim);
  color: #a78bfa; font-size: 11px; font-weight: 500;
  padding: 3px 10px; border-radius: 20px; white-space: nowrap;
}
.search-wrap { position: relative; display: flex; align-items: center; margin-left: 8px; }
.search-wrap i { position: absolute; left: 10px; color: var(--text-3); font-size: 11px; pointer-events: none; }
.topbar-search {
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-family: var(--font-sans);
  font-size: 13px; padding: 5px 12px 5px 30px; width: 190px; outline: none;
  transition: border-color var(--tr), width var(--tr);
}
.topbar-search:focus { border-color: var(--purple); width: 240px; }

/* ── SIDEBAR ── */
.sidebar {
  background: var(--bg-2); border-right: 1px solid var(--border);
  padding: 16px 0; position: sticky; top: 56px;
  height: calc(100vh - 56px); overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 2px; }
.sidebar-label {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--text-3);
  padding: 14px 16px 5px;
}
.sidebar-item {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 16px; color: var(--text-2); font-size: 13px;
  cursor: pointer; transition: background var(--tr), color var(--tr);
  border: none; background: none; width: 100%; text-align: left;
}
.sidebar-item:hover { background: var(--bg-3); color: var(--text); }
.sidebar-item.active { background: var(--purple-glow); color: #a78bfa; }
.sidebar-item i { width: 15px; text-align: center; font-size: 12px; flex-shrink: 0; }
.sidebar-dot {
  width: 5px; height: 5px; border-radius: 50%; margin-left: auto; flex-shrink: 0;
}
.dot-green  { background: var(--green); }
.dot-amber  { background: var(--amber); }
.dot-purple { background: #a78bfa; }
.dot-blue   { background: var(--teal); }

/* ── CONTENT AREA ── */
.main { padding: 36px 44px; overflow-y: auto; }
.page { display: none; animation: fadeIn 0.2s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:none; } }

/* ── HOME PAGE ── */
.home-hero {
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  background: linear-gradient(135deg, var(--bg-3) 0%, rgba(124,58,237,0.07) 60%, rgba(14,165,233,0.05) 100%);
  position: relative; overflow: hidden; margin-bottom: 32px;
}
.home-hero::before {
  content: ''; position: absolute; top: -80px; right: -80px;
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(124,58,237,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.home-hero::after {
  content: ''; position: absolute; bottom: -60px; left: 30%;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(14,165,233,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.home-eyebrow {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.12em; color: #a78bfa; margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.home-eyebrow::before {
  content: ''; width: 20px; height: 2px;
  background: linear-gradient(90deg, #7c3aed, #a855f7); border-radius: 1px;
}
.home-hero h1 {
  font-size: 32px; font-weight: 700; letter-spacing: -0.025em;
  color: var(--text); line-height: 1.25; margin-bottom: 14px;
}
.home-hero h1 span { color: #a78bfa; }
.home-intro {
  font-size: 15px; color: var(--text-2); line-height: 1.7;
  max-width: 580px; margin-bottom: 28px;
}
.home-intro strong { color: var(--text); }
.home-stats {
  display: flex; gap: 0; margin-bottom: 32px;
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; width: fit-content;
}
.home-stat {
  padding: 14px 24px; border-right: 1px solid var(--border);
  text-align: center; min-width: 90px;
}
.home-stat:last-child { border-right: none; }
.home-stat-n { font-size: 24px; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; line-height: 1; }
.home-stat-n em { color: #a78bfa; font-style: normal; }
.home-stat-l { font-size: 10px; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }

/* Quick links grid on home */
.home-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.home-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 18px 20px;
  cursor: pointer; transition: border-color var(--tr), background var(--tr), transform var(--tr);
  display: flex; flex-direction: column; gap: 8px;
}
.home-card:hover { border-color: var(--border-hi); background: var(--bg-3); transform: translateY(-1px); }
.home-card-icon {
  width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; margin-bottom: 2px; flex-shrink: 0;
}
.ic-purple { background: rgba(124,58,237,0.18); color: #c4b5fd; }
.ic-teal   { background: rgba(14,165,233,0.15); color: #7dd3fc; }
.ic-green  { background: rgba(34,197,94,0.15);  color: #86efac; }
.ic-amber  { background: rgba(245,158,11,0.15); color: #fcd34d; }
.ic-pink   { background: rgba(236,72,153,0.15); color: #f9a8d4; }
.ic-red    { background: rgba(239,68,68,0.15);  color: #fca5a5; }
.ic-blue   { background: rgba(14,165,233,0.12); color: #38bdf8; }
.ic-slate  { background: rgba(100,116,139,0.15);color: #94a3b8; }
.home-card-title { font-size: 13px; font-weight: 600; color: var(--text); }
.home-card-desc  { font-size: 12px; color: var(--text-3); line-height: 1.4; }
.home-card-tags  { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 4px; }

/* ── CONTENT SECTIONS ── */
.page-header { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.page-eyebrow {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--text-3); margin-bottom: 6px;
}
.page-header h2 { font-size: 22px; font-weight: 700; letter-spacing: -0.015em; color: var(--text); }
.page-header p  { font-size: 13.5px; color: var(--text-2); margin-top: 6px; }
.page-icon-wrap {
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; margin-bottom: 12px;
}

/* ── CARD ── */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px 24px; margin-bottom: 14px;
  transition: border-color var(--tr);
}
.card:hover { border-color: var(--border-hi); }
.card-title { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.card-desc  { font-size: 13px; color: var(--text-2); line-height: 1.55; }
.card-tags  { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

/* ── TAGS & BADGES ── */
.tag { font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 20px; border: 1px solid; }
.tag-bash   { background:rgba(34,197,94,0.1);  border-color:rgba(34,197,94,0.3);  color:#86efac; }
.tag-cpp    { background:rgba(124,58,237,0.1); border-color:rgba(124,58,237,0.3); color:#c4b5fd; }
.tag-html   { background:rgba(245,158,11,0.1); border-color:rgba(245,158,11,0.3); color:#fcd34d; }
.tag-ssh    { background:rgba(14,165,233,0.1); border-color:rgba(14,165,233,0.3); color:#7dd3fc; }
.tag-docker { background:rgba(14,165,233,0.12);border-color:rgba(14,165,233,0.4); color:#38bdf8; }
.tag-nodejs { background:rgba(34,197,94,0.12); border-color:rgba(34,197,94,0.4);  color:#4ade80; }
.tag-mgl    { background:rgba(236,72,153,0.1); border-color:rgba(236,72,153,0.3); color:#f9a8d4; }
.badge { font-size: 10px; font-weight: 600; padding: 2px 9px; border-radius: 20px; text-transform: uppercase; letter-spacing: 0.04em; border: 1px solid; display: inline-flex; align-items: center; gap: 4px; }
.badge-done  { background:rgba(34,197,94,0.12); border-color:rgba(34,197,94,0.3);  color:#86efac; }
.badge-wip   { background:rgba(245,158,11,0.12);border-color:rgba(245,158,11,0.3); color:#fcd34d; }
.badge-info  { background:rgba(14,165,233,0.12);border-color:rgba(14,165,233,0.3); color:#7dd3fc; }
.badge-part  { background:rgba(100,116,139,0.12);border-color:rgba(100,116,139,0.3);color:#94a3b8; }

/* ── CODE BLOCKS ── */
.code-block { background:var(--bg-code); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; margin-top:12px; }
.code-header {
  display:flex; align-items:center; gap:8px;
  padding:8px 14px; background:rgba(255,255,255,0.025);
  border-bottom:1px solid var(--border);
  font-family:var(--font-mono); font-size:11px; color:var(--text-3);
}
.code-copy {
  margin-left:auto; background:none; border:1px solid var(--border);
  color:var(--text-3); font-size:11px; padding:2px 8px; border-radius:4px;
  cursor:pointer; font-family:var(--font-sans); transition:all var(--tr);
}
.code-copy:hover { border-color:var(--purple); color:#a78bfa; }
.code-copy.copied { border-color:var(--green); color:var(--green); }
pre.code {
  padding:14px 16px; font-size:12px; line-height:1.75;
  color:var(--text-code); overflow-x:auto; white-space:pre;
}
pre.code .cmt  { color:var(--text-3); }
pre.code .kw   { color:#f472b6; }
pre.code .str  { color:#86efac; }
pre.code .var  { color:#fcd34d; }
pre.code .cmd  { color:#38bdf8; }
pre.code .path { color:#c4b5fd; }

/* ── ACCORDION ── */
.accordion { border:1px solid var(--border); border-radius:var(--radius); margin-top:12px; overflow:hidden; }
.acc-btn {
  width:100%; background:var(--bg-3); border:none; color:var(--text-2);
  font-size:13px; font-family:var(--font-sans); padding:11px 16px;
  display:flex; align-items:center; gap:9px; cursor:pointer;
  transition:background var(--tr), color var(--tr);
}
.acc-btn:hover { background:var(--border); color:var(--text); }
.acc-btn i.ch { margin-left:auto; transition:transform var(--tr); font-size:11px; }
.acc-btn.open { color:var(--text); }
.acc-btn.open i.ch { transform:rotate(180deg); }
.acc-body { display:none; padding:16px; background:var(--bg-code); }
.acc-body.open { display:block; }

/* ── INFO BOXES ── */
.infobox { display:flex; gap:10px; padding:12px 16px; border-radius:var(--radius); margin:12px 0; font-size:13px; }
.infobox i { flex-shrink:0; margin-top:2px; }
.infobox.warn    { background:rgba(245,158,11,0.07); border:1px solid rgba(245,158,11,0.22); color:#fcd34d; }
.infobox.danger  { background:rgba(239,68,68,0.07);  border:1px solid rgba(239,68,68,0.22);  color:#fca5a5; }
.infobox.info    { background:rgba(14,165,233,0.07); border:1px solid rgba(14,165,233,0.22); color:#7dd3fc; }
.infobox.success { background:rgba(34,197,94,0.07);  border:1px solid rgba(34,197,94,0.22);  color:#86efac; }

/* ── LINK LIST ── */
.link-list { display:flex; flex-direction:column; gap:7px; margin-top:12px; }
.link-item {
  display:flex; align-items:center; gap:10px;
  padding:10px 14px; background:var(--bg-3); border:1px solid var(--border);
  border-radius:8px; color:var(--text-2); font-size:13px; text-decoration:none;
  transition:all var(--tr);
}
.link-item:hover { background:var(--border); color:var(--text); border-color:var(--border-hi); text-decoration:none; }
.link-item i { width:16px; text-align:center; color:var(--text-3); flex-shrink:0; }
.link-item .ll { flex:1; }
.link-item .lu { font-size:11px; font-family:var(--font-mono); color:var(--text-3); }
.link-item:hover .lu { color:var(--teal); }

/* ── TABLE ── */
.mini-table { width:100%; border-collapse:collapse; font-size:12.5px; margin-top:12px; }
.mini-table th { background:var(--bg-3); color:var(--text-3); font-weight:600; font-size:10.5px; text-transform:uppercase; letter-spacing:0.05em; padding:8px 12px; text-align:left; border-bottom:1px solid var(--border); }
.mini-table td { padding:8px 12px; border-bottom:1px solid var(--border); color:var(--text-2); vertical-align:top; }
.mini-table tr:last-child td { border-bottom:none; }
.mini-table td code { background:var(--bg-code); padding:1px 6px; border-radius:3px; font-size:11px; color:var(--text-code); }
.good { color:#86efac !important; }
.bad  { color:#fca5a5 !important; }
.warn-c { color:#fcd34d !important; }

/* ── CARD GRID ── */
.c2 { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:12px; }
.mini-card { background:var(--bg-3); border:1px solid var(--border); border-radius:var(--radius); padding:14px 16px; }
.mc-title { font-size:11px; font-weight:700; color:var(--text-3); text-transform:uppercase; letter-spacing:0.06em; margin-bottom:8px; }
.mini-card ul { list-style:none; display:flex; flex-direction:column; gap:5px; }
.mini-card li { font-size:12.5px; color:var(--text-2); display:flex; gap:7px; align-items:flex-start; }
.mini-card li::before { content:'→'; color:var(--text-3); flex-shrink:0; }
.mini-card li.y::before { content:'✓'; color:var(--green); }
.mini-card li.n::before { content:'✗'; color:var(--red); }
.mini-card li.w::before { content:'⚠'; color:var(--amber); }
.mini-card li code { background:var(--bg-code); padding:1px 5px; border-radius:3px; font-size:11px; color:var(--text-code); }

/* search */
mark { background:rgba(124,58,237,0.35); color:#c4b5fd; border-radius:2px; padding:0 1px; }

/* ── RESPONSIVE ── */
@media (max-width:900px) {
  .layout { grid-template-columns:1fr; }
  .sidebar { display:none; }
  .main { padding:24px 18px; }
}
@media (max-width:650px) {
  .home-hero { padding:24px 20px; }
  .home-hero h1 { font-size:22px; }
  .home-grid { grid-template-columns:1fr 1fr; }
  .c2 { grid-template-columns:1fr; }
  .home-stats { flex-wrap:wrap; }
  .topbar-sub, .search-wrap { display:none; }
}
@media (max-width:400px) {
  .home-grid { grid-template-columns:1fr; }
}