:root{
  --bg: #0b0f14;
  --panel: rgba(255,255,255,0.06);
  --panel-2: rgba(255,255,255,0.09);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.70);
  --faint: rgba(255,255,255,0.55);
  --border: rgba(255,255,255,0.12);
  --accent: #7ee2ff;
  --accent-2: #b6ffb0;
  --shadow: 0 16px 50px rgba(0,0,0,0.45);
  --radius: 18px;
  --max: 980px;
}

*{ 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";
  color: var(--text);
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(126,226,255,0.14), transparent 60%),
    radial-gradient(800px 520px at 80% 0%, rgba(182,255,176,0.10), transparent 60%),
    radial-gradient(900px 700px at 50% 100%, rgba(126,226,255,0.08), transparent 60%),
    var(--bg);
  line-height: 1.6;
}

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

.container{
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus{
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  z-index: 9999;
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11,15,20,0.62);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 720;
  letter-spacing: 0.2px;
}
.logo{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(126,226,255,0.9), rgba(182,255,176,0.8));
  box-shadow: var(--shadow);
  display: inline-block;
}
.brand span{
  display: inline-block;
  transform: translateY(-0.5px);
}

.nav{
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav a{
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  background: transparent;
}
.nav a:hover{
  background: var(--panel);
  border-color: var(--border);
  color: var(--text);
  text-decoration: none;
}
.nav a[aria-current="page"]{
  background: var(--panel-2);
  border-color: var(--border);
  color: var(--text);
}

main{ padding: 44px 0 60px; }

.hero{
  padding: 28px 0 10px;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  align-items: stretch;
}
@media (max-width: 880px){
  .hero-grid{ grid-template-columns: 1fr; }
}

.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card{
  padding: 26px 24px;
}
.kicker{
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  font-size: 13px;
}
.kicker .dot{
  width: 8px; height: 8px; border-radius: 99px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(126,226,255,0.45);
}

h1{
  margin: 14px 0 10px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.6px;
}
.subtitle{
  margin: 0;
  font-size: 16px;
  color: var(--muted);
  max-width: 60ch;
}

.hero-side{
  padding: 22px 20px;
  display: grid;
  gap: 12px;
  align-content: start;
}
.hero-side h2{
  margin: 4px 0 4px;
  font-size: 16px;
  color: var(--text);
}
.mini{
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

.pill-list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill{
  font-size: 13px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.045);
  color: var(--muted);
}

.section{
  margin-top: 22px;
}
.section h2{
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: -0.2px;
}
.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 880px){
  .grid-3{ grid-template-columns: 1fr; }
}

.feature{
  padding: 18px 18px;
}
.feature h3{
  margin: 0 0 6px;
  font-size: 16px;
}
.feature p{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.guides{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 880px){
  .guides{ grid-template-columns: 1fr; }
}

.guide{
  padding: 18px 18px;
  display: grid;
  gap: 10px;
}
.guide .meta{
  color: var(--faint);
  font-size: 13px;
}
.guide h3{
  margin: 0;
  font-size: 16px;
  line-height: 1.3;
}
.guide p{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.cta{
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
}
.cta:hover{
  background: rgba(255,255,255,0.08);
  text-decoration: none;
}
.arrow{ opacity: 0.9; }

.about{
  padding: 18px 18px;
}
.about p{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  max-width: 75ch;
}

.notice{
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
}
.notice p{
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
}
.notice strong{ color: var(--text); }

.site-footer{
  border-top: 1px solid var(--border);
  padding: 18px 0 28px;
  color: var(--faint);
  font-size: 13px;
}

.article-header{
  padding: 18px 0 0;
}
.breadcrumb{
  color: var(--faint);
  font-size: 13px;
}
.breadcrumb a{ color: var(--muted); }
.article-title{
  margin: 10px 0 8px;
  font-size: clamp(26px, 3.3vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.4px;
}
.article-sub{
  margin: 0 0 14px;
  color: var(--muted);
  max-width: 80ch;
}

.article{
  padding: 22px 22px;
}
.article h2{
  margin: 18px 0 8px;
  font-size: 18px;
}
.article h3{
  margin: 14px 0 6px;
  font-size: 16px;
}
.article p, .article li{
  color: var(--muted);
}
.article ul{
  margin: 8px 0 10px 18px;
}
.article .callout{
  margin-top: 14px;
  padding: 14px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
}
.article .callout p{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.article-nav{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.article-nav a{
  padding: 9px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
}
.article-nav a:hover{
  background: rgba(255,255,255,0.08);
  text-decoration: none;
}