:root{
  --bg:#070d13;
  --bg-2:#0c1620;
  --surface:#101d29;
  --line:#1d3141;
  --ink:#e8f3fa;
  --muted:#93aab9;
  --ice:#8fd6f7;
  --ice-soft:#cfeeff;
  --ember:#ff6b2c;
  --ember-soft:#ff9a5c;
  --radius:14px;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--ice);text-underline-offset:3px}
a:hover{color:var(--ice-soft)}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px;border-radius:4px}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}

/* header */
.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(7,13,19,.82);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;letter-spacing:.02em}
.brand:hover{color:var(--ink)}
.brand svg{width:30px;height:30px}
.brand span b{color:var(--ember)}
nav a{color:var(--muted);text-decoration:none;margin-left:22px;font-size:.95rem}
nav a:hover,nav a[aria-current="page"]{color:var(--ice-soft)}

/* hero */
.hero{
  position:relative;
  padding:110px 0 96px;
  overflow:hidden;
  background:
    radial-gradient(700px 360px at 80% -10%, rgba(255,107,44,.22), transparent 70%),
    radial-gradient(800px 420px at 10% 0%, rgba(143,214,247,.16), transparent 70%),
    var(--bg);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--ice),var(--ember),transparent);
  opacity:.55;
}
.eyebrow{
  display:inline-block;margin:0 0 18px;
  font-size:.8rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ice);
}
h1{
  margin:0;
  font-size:clamp(2.4rem,7vw,4.4rem);
  line-height:1.05;letter-spacing:-.02em;
}
h1 .fire{
  background:linear-gradient(90deg,var(--ember-soft),var(--ember));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
h1 .frost{
  background:linear-gradient(90deg,var(--ice-soft),var(--ice));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{max-width:34em;margin:22px 0 0;font-size:1.2rem;color:var(--muted)}
.btn{
  display:inline-block;margin-top:34px;padding:13px 24px;border-radius:999px;
  background:var(--ember);color:#1a0a02;font-weight:700;text-decoration:none;
  transition:transform .15s ease, background .15s ease;
}
.btn:hover{background:var(--ember-soft);color:#1a0a02;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ice);border:1px solid var(--line);margin-left:10px}
.btn.ghost:hover{background:var(--surface);color:var(--ice-soft)}

/* sections */
section{padding:84px 0}
section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{margin:0 0 12px;font-size:clamp(1.6rem,4vw,2.2rem);letter-spacing:-.01em}
.sub{margin:0 0 36px;color:var(--muted);max-width:38em}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
}
.card h3{margin:0 0 8px;font-size:1.15rem}
.card p{margin:0;color:var(--muted)}
.card .tag{
  display:inline-block;margin-bottom:14px;padding:3px 10px;border-radius:999px;
  font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--line);color:var(--ice);
}
.card.fire .tag{color:var(--ember-soft)}
.card.fire{border-top:2px solid var(--ember)}
.card.ice{border-top:2px solid var(--ice)}

/* prose pages */
.page{padding:72px 0 96px}
.page h1{font-size:clamp(2rem,5vw,3rem)}
.page .meta{color:var(--muted);margin:10px 0 40px}
.prose{max-width:46em}
.prose h2{margin-top:44px;font-size:1.35rem}
.prose p,.prose li{color:#c4d6e2}
.prose ul{padding-left:1.2em}
.notice{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--ember);
  border-radius:10px;padding:18px 22px;margin:26px 0;
}
.notice p{margin:0;color:var(--ink)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:34px 0;color:var(--muted);font-size:.92rem}
.site-footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between}
.site-footer a{color:var(--muted);margin-right:18px;text-decoration:none}
.site-footer a:hover{color:var(--ice-soft)}

@media (prefers-reduced-motion:no-preference){
  .hero .glow{animation:breathe 7s ease-in-out infinite}
  @keyframes breathe{0%,100%{opacity:.7}50%{opacity:1}}
}
@media (max-width:640px){
  .site-header .wrap{height:auto;padding-top:12px;padding-bottom:12px;flex-wrap:wrap;gap:6px}
  nav a{margin:0 16px 0 0}
  .hero{padding:72px 0 64px}
  section{padding:60px 0}
  .btn.ghost{margin-left:0;margin-top:12px}
}