:root{
  --bg: #0b0c10;
  --surface: rgba(255,255,255,.06);
  --surface2: rgba(255,255,255,.09);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);
  --border: rgba(255,255,255,.14);
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 980px;
  --accent: #69d2ff;
  --accent2:#a7ffcb;
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f6f7fb;
    --surface: #ffffff;
    --surface2: #f1f3f8;
    --text: rgba(0,0,0,.88);
    --muted: rgba(0,0,0,.62);
    --border: rgba(0,0,0,.10);
    --shadow: 0 14px 40px rgba(0,0,0,.10);
    --accent: #0ea5e9;
    --accent2:#10b981;
  }
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
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 10% 0%, rgba(105,210,255,.25), transparent 55%),
              radial-gradient(900px 500px at 95% 10%, rgba(167,255,203,.18), transparent 50%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 3px; }

.container{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.skip{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip:focus{
  left:16px;
  top:16px;
  width:auto;
  height:auto;
  padding:10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  z-index: 1000;
}

.header{
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}
.header__inner{
  display:flex;
  gap: 16px;
  align-items:center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
  min-width: 220px;
}
.brand__mark{
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 10px 22px rgba(0,0,0,.18);
}
.brand__title{
  font-weight: 700;
  letter-spacing: .2px;
}
.brand__subtitle{
  font-size: 13px;
  color: var(--muted);
  margin-top: -2px;
}

.nav{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content:flex-end;
}
.nav__link{
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
}
.nav__link:hover{
  background: var(--surface);
  border-color: var(--border);
  text-decoration: none;
  color: var(--text);
}
.nav__link.is-active{
  background: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}

.main{
  padding: 26px 0 56px;
}

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.card__header{
  padding: 26px 24px 0;
}
.card__footer{
  padding: 14px 24px 20px;
  border-top: 1px solid var(--border);
}

.h1{
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.15;
  margin: 0 0 10px;
}
.lede{
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--muted);
}
.meta{
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--muted);
}

.prose{
  padding: 0 24px 24px;
}
.prose h2{
  margin-top: 26px;
  margin-bottom: 10px;
  font-size: 20px;
}
.prose h3{
  margin-top: 18px;
  margin-bottom: 8px;
  font-size: 16px;
}
.prose p{ margin: 10px 0; }
.prose ul, .prose ol{ padding-left: 20px; }
.prose li{ margin: 6px 0; }

.prose code{
  padding: 2px 6px;
  border-radius: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  font-size: 0.95em;
}
.prose blockquote{
  margin: 16px 0;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--surface2);
  border-radius: 12px;
  color: var(--muted);
}

.callout{
  margin: 16px 0;
  padding: 14px 14px;
  border: 1px solid var(--border);
  background: var(--surface2);
  border-radius: 14px;
}
.callout strong{ color: var(--text); }

.fineprint{
  display:flex;
  gap: 10px;
  align-items:center;
  justify-content: space-between;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
}
.fineprint__links a{ color: var(--muted); }
.fineprint__links a:hover{ color: var(--text); }

.footer-note{
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  text-align:center;
}