:root{
  --bg:#0b1220;
  --fg:#f5f7ff;
  --muted:#b8c2da;
  --card:#0f1a2d;
  --card2:#0d1627;
  --line:rgba(255,255,255,.10);
  --shadow:0 18px 60px rgba(0,0,0,.45);
  --accent:#4dd6ff;
  --accent2:#7c5cff;
  --good:#16e0a5;
  --warn:#ffcf5a;
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(77,214,255,.18), transparent 60%),
    radial-gradient(900px 500px at 80% 0%, rgba(124,92,255,.16), transparent 55%),
    radial-gradient(1000px 700px at 50% 120%, rgba(22,224,165,.10), transparent 55%),
    var(--bg);
  color:var(--fg);
  line-height:1.75;
}
a{color:var(--accent); text-decoration:none}
a:hover{opacity:.92}
.container{max-width:1180px; margin:0 auto; padding:22px}
.small{font-size:.92rem; color:var(--muted)}
.badge{
  display:inline-flex; gap:.5rem; align-items:center;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  padding:.35rem .65rem;
  border-radius:999px;
  color:var(--muted);
  font-size:.82rem;
}

header.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background:rgba(11,18,32,.65);
  border-bottom:1px solid var(--line);
}
.navbar{
  display:flex; align-items:center; justify-content:space-between;
  gap:14px;
}
.brand{
  display:flex; align-items:center; gap:10px; min-width:190px;
}
.brand svg{width:34px; height:34px; filter: drop-shadow(0 10px 24px rgba(0,0,0,.35));}
.brand-name{font-weight:800; letter-spacing:.2px}
.brand-tag{color:var(--muted); font-size:.85rem; margin-top:-4px}

.nav-links{
  display:none;
  align-items:center; justify-content:center;
  gap:18px;
  flex: 1;
}
.nav-links a{
  color:var(--fg);
  opacity:.9;
  padding:.5rem .55rem;
  border-radius:999px;
}
.nav-links a:hover{
  background:rgba(255,255,255,.06);
}
.nav-actions{
  display:flex; gap:10px; align-items:center; justify-content:flex-end;
  min-width:190px;
}
.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:40px; height:40px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--fg);
  cursor:pointer;
}
.icon-btn:hover{background:rgba(255,255,255,.08)}
#hamburger{display:inline-flex}

@media (min-width: 920px){
  .nav-links{display:flex}
  #hamburger{display:none}
}

.hero{
  padding:54px 0 22px 0;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:18px;
}
@media (min-width: 980px){
  .hero-grid{grid-template-columns: 1.15fr .85fr; align-items:stretch}
}

.card{
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card.pad{padding:22px}
.card.soft{background: rgba(255,255,255,.04); box-shadow:none}
.kicker{color:var(--muted); text-transform:uppercase; letter-spacing:.15em; font-size:.78rem}
h1{line-height:1.12; letter-spacing:-.02em; margin:.4rem 0 0 0; font-size:2.25rem}
@media (min-width: 980px){ h1{font-size:2.85rem} }
.lede{color:var(--muted); font-size:1.05rem; margin:.75rem 0 0 0}
.cta-row{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
.btn{
  border:1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color:#041018;
  font-weight:800;
  padding:.75rem 1rem;
  border-radius: 999px;
  cursor:pointer;
  display:inline-flex; align-items:center; gap:.55rem;
}
.btn:hover{filter:brightness(1.05)}
.btn-ghost{
  background: rgba(255,255,255,.05);
  border-color: var(--line);
  color: var(--fg);
}
.btn-ghost:hover{background: rgba(255,255,255,.08)}
.btn:active{transform: translateY(1px)}
.btn-wide{padding:.85rem 1.15rem}

.split{
  display:grid; gap:14px;
  grid-template-columns:1fr;
}
@media(min-width: 980px){ .split{grid-template-columns:1fr 1fr} }

.chart-wrap{padding:16px 18px}
svg.chart{width:100%; height:auto; display:block}

.section{padding:20px 0}
.section h2{margin:0 0 10px 0; font-size:1.35rem}
.grid{
  display:grid; gap:14px;
  grid-template-columns:1fr;
}
@media(min-width: 680px){ .grid{grid-template-columns: repeat(2, 1fr)} }
@media(min-width: 1040px){ .grid{grid-template-columns: repeat(3, 1fr)} }

.post-card{padding:16px 16px 14px 16px}
.post-card h3{margin:0 0 8px 0; font-size:1.05rem; line-height:1.25}
.post-meta{color:var(--muted); font-size:.86rem}
.post-snippet{color:var(--muted); margin:.55rem 0 0 0; font-size:.95rem}
.post-card:hover{border-color: rgba(77,214,255,.35)}

.footer{
  padding:34px 0;
  border-top:1px solid var(--line);
  margin-top:26px;
  color:var(--muted);
}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--fg)}
.footer-grid{
  display:grid; gap:14px; grid-template-columns:1fr;
}
@media(min-width: 880px){ .footer-grid{grid-template-columns: 1.2fr .8fr .8fr} }

.article{
  max-width:860px;
  margin:0 auto;
  padding:24px 0 34px 0;
}
.article h1{font-size:2rem}
.article h2{margin:1.6rem 0 .35rem 0; font-size:1.25rem}
.article p{color:rgba(245,247,255,.92)}
.article ul, .article ol{padding-left:1.15rem}
.article li{margin:.35rem 0}
.article blockquote{
  margin:1.25rem 0;
  padding:14px 16px;
  border-left:3px solid rgba(77,214,255,.6);
  background: rgba(255,255,255,.05);
  border-radius: 12px;
  color: var(--muted);
}
.callout{
  margin:18px 0;
  padding:14px 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  border-radius: 14px;
}
.callout strong{color:var(--fg)}
hr.sep{border:none; border-top:1px solid var(--line); margin:18px 0}

.related{display:flex; flex-wrap:wrap; gap:10px}
.related a{
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  padding:.45rem .7rem;
  border-radius:999px;
  color:var(--fg);
  font-size:.9rem;
}
.related a:hover{border-color: rgba(124,92,255,.5)}

#cookiebar{
  position:fixed; left:12px; right:12px; bottom:12px; z-index:100;
  border:1px solid var(--line);
  background: rgba(10,16,28,.92);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
#cookiebar .cookie-inner{
  display:flex; gap:12px; align-items:center; justify-content:space-between;
  padding:12px 14px;
  flex-wrap:wrap;
}
#cookiebar .cookie-text{color:var(--muted); font-size:.92rem; max-width:800px}
#cookiebar.hide{opacity:0; transform: translateY(6px); transition: .22s ease}
.cookie-actions{display:flex; gap:10px; align-items:center}

#nav-overlay{
  position:fixed; inset:0; z-index:80;
  background: rgba(0,0,0,.55);
  display:none;
}
#nav-overlay.active{display:block}
.nav-sheet{
  position:absolute; top:0; right:0; width:min(380px, 92vw); height:100%;
  background: rgba(11,18,32,.96);
  border-left:1px solid var(--line);
  padding:16px;
}
.nav-sheet a{display:block; padding:12px 10px; border-radius:12px; color:var(--fg)}
.nav-sheet a:hover{background: rgba(255,255,255,.06)}
.nav-sheet .sheet-top{display:flex; align-items:center; justify-content:space-between; margin-bottom:8px}

#search-modal{
  position:fixed; inset:0; z-index:90;
  background: rgba(0,0,0,.55);
  display:none;
}
#search-modal.active{display:block}
.search-sheet{
  width:min(860px, 92vw);
  margin: 8vh auto 0 auto;
  background: rgba(11,18,32,.96);
  border:1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.search-top{
  display:flex; align-items:center; gap:10px;
  padding:14px;
  border-bottom:1px solid var(--line);
}
.search-top input{
  flex:1;
  background: rgba(255,255,255,.06);
  border:1px solid var(--line);
  color: var(--fg);
  border-radius: 12px;
  padding: 12px 12px;
  font-size: 1rem;
  outline: none;
}
.search-top input:focus{border-color: rgba(77,214,255,.55)}
.search-results{
  max-height: 60vh;
  overflow:auto;
  padding: 10px 10px 12px 10px;
}
.search-item{
  display:block;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
}
.search-item:hover{background: rgba(255,255,255,.05); border-color: var(--line)}
.search-item-title{font-weight:800; color:var(--fg)}
.search-item-meta{color:var(--muted); font-size:.85rem; margin-top:2px}
.search-item-snippet{color:var(--muted); font-size:.93rem; margin-top:6px}

.form{
  display:grid; gap:10px;
}
textarea, input[type="text"], select{
  width:100%;
  background: rgba(255,255,255,.06);
  border:1px solid var(--line);
  color: var(--fg);
  border-radius: 14px;
  padding: 12px;
  font-size: .98rem;
  outline:none;
}
textarea{min-height:120px; resize:vertical}
textarea:focus, input[type="text"]:focus, select:focus{border-color: rgba(77,214,255,.55)}
.tool-output{
  white-space:pre-wrap;
  background: rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  color: var(--fg);
}
kbd{background:rgba(255,255,255,.08); border:1px solid var(--line); padding:.1rem .4rem; border-radius:8px}