@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Fira+Sans:wght@300;400;500;600;700&display=swap');

:root{
  --ink:#0B1220;
  --cy:#22D3EE;
  --am:#F59E0B;
  --fg:#E8EFF9;
  --tx:#C3D2E4;
  --mut:#8296B0;
  --line:rgba(34,211,238,.16);
  --panel:#0F1A2B;
  --r:18px;
  --shadow:0 18px 42px -24px rgba(0,0,0,.9), 0 1px 0 rgba(255,255,255,.04) inset;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 78% -12%,rgba(34,211,238,.14),transparent 70%),
    radial-gradient(700px 480px at 6% 2%,rgba(245,158,11,.1),transparent 72%);
  background-repeat:no-repeat;
  color:var(--fg);
  font-family:"Fira Sans",-apple-system,"Segoe UI",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;line-height:1.74;letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
p{margin:0}
:focus-visible{outline:2px solid var(--am);outline-offset:3px;border-radius:8px}
.navtoggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
body:has(.navtoggle:checked){overflow:hidden}

/* ---------- header ---------- */
.hd{
  position:sticky;top:0;z-index:40;
  display:grid;grid-template-columns:1fr auto auto 1fr;
  align-items:center;gap:12px;
  padding:9px clamp(12px,3vw,28px);
  background:rgba(9,15,26,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
}
.hd-nav p{display:flex;flex-wrap:wrap;gap:2px;margin:0}
.hd-nav a{
  display:inline-flex;align-items:center;min-height:44px;
  padding:0 8px;border-radius:9px;text-decoration:none;
  font-family:"Fira Code",monospace;font-size:13px;letter-spacing:.02em;
  color:var(--mut);transition:color .18s ease,background .18s ease;
}
.hd-nav a:hover,.hd-nav a:focus-visible{color:var(--cy);background:rgba(34,211,238,.1)}
.hd-nav-a{justify-self:start}
.hd-nav-b{justify-self:end}
.brand{
  display:inline-flex;align-items:center;gap:9px;min-height:44px;
  padding:0 10px;text-decoration:none;color:#fff;
  font-family:"Fira Code",monospace;font-weight:700;font-size:17px;letter-spacing:.14em;
}
.brand-mark img{width:24px;height:24px;object-fit:contain}
.brand:hover .brand-t{color:var(--cy)}
.hd-tools{display:flex;align-items:center;gap:8px}
.find{margin:0;display:block}
.find-q{
  width:118px;min-height:40px;padding:0 13px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  color:var(--fg);font-family:"Fira Code",monospace;font-size:13px;
}
.find-q::placeholder{color:var(--mut)}
.find-q:focus{border-color:var(--cy);outline:none}
.burger,.shut{
  display:inline-flex;align-items:center;justify-content:center;min-height:44px;
  padding:0 15px;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:rgba(34,211,238,.07);
  color:var(--fg);font-family:"Fira Code",monospace;font-size:13px;letter-spacing:.16em;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.burger:hover,.shut:hover{color:var(--cy);border-color:var(--cy);background:rgba(34,211,238,.14)}
.navtoggle:checked ~ .hd .burger{color:var(--am);border-color:var(--am)}

/* ---------- overlay ---------- */
.veil{
  position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:22px;
  background:radial-gradient(700px 420px at 80% 0%,rgba(34,211,238,.16),transparent 68%),rgba(7,12,21,.97);
  opacity:0;visibility:hidden;transition:opacity .32s ease,visibility .32s ease;
}
.navtoggle:checked ~ .veil{opacity:1;visibility:visible}
.veil-in{width:100%;max-width:740px;max-height:100%;overflow:auto;padding:6px 2px 20px}
.veil-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.veil-brand{font-family:"Fira Code",monospace;font-weight:700;letter-spacing:.2em;color:#fff}
.veil-nav p{display:flex;flex-direction:column;gap:2px;margin:14px 0 0}
.veil-nav a{
  display:flex;align-items:center;min-height:52px;padding:6px 8px;
  font-family:"Fira Code",monospace;font-size:clamp(20px,4.4vw,30px);font-weight:500;
  color:var(--fg);text-decoration:none;border-bottom:1px solid var(--line);
  transition:color .2s ease,padding-left .2s ease,background .2s ease;
}
.veil-nav a:hover,.veil-nav a:focus-visible{color:var(--am);padding-left:16px;background:rgba(245,158,11,.06)}
.find-lg{display:none}
.find-lg .q{
  width:100%;min-height:44px;padding:0 15px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--fg);font-family:"Fira Code",monospace;font-size:14px;
}

/* ---------- main grid ---------- */
main{
  display:grid;grid-template-columns:minmax(0,1fr);
  gap:0 0;max-width:1180px;margin:0 auto;padding:0 clamp(14px,3vw,30px);
}
@media (min-width:980px){
  main{grid-template-columns:214px minmax(0,1fr);gap:0 clamp(20px,3vw,46px)}
}

/* ---------- hero ---------- */
.hero{
  grid-column:1 / -1;position:relative;overflow:hidden;
  min-height:45vh;display:grid;place-items:center;text-align:center;
  padding:clamp(26px,5vw,58px) 14px clamp(26px,5vw,52px);
  border-bottom:1px solid var(--line);
}
.ghost{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  font-family:"Fira Code",monospace;font-weight:700;line-height:1;
  font-size:clamp(54px,15vw,190px);letter-spacing:-.045em;white-space:nowrap;
  background-image:linear-gradient(92deg,var(--cy),var(--am));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  pointer-events:none;animation:drift .9s ease both;
}
.hero-in{position:relative;z-index:2;display:grid;justify-items:center;gap:14px}
.hero-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:var(--r);
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);
  animation:rise .65s cubic-bezier(.2,.7,.3,1) both;
}
.hero-mark img{width:30px;height:30px;object-fit:contain}
.hero h1{
  margin:0;max-width:22ch;
  font-size:clamp(29px,6.4vw,58px);line-height:1.18;letter-spacing:-.02em;
  background-image:linear-gradient(94deg,#ffffff 8%,var(--cy) 56%,var(--am) 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:type 1.15s steps(20,end) both;
}
.hero h1::after{
  content:"";display:inline-block;width:.08em;height:.82em;margin-left:.1em;
  vertical-align:-.06em;background:var(--am);opacity:0;
  animation:blink 1.05s steps(1) 1.25s infinite;
}
.hero-desc{
  max-width:54ch;color:var(--mut);font-size:16px;
  animation:rise .7s ease .35s both;
}
@keyframes type{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0 0 0 0)}}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes drift{from{opacity:0;transform:translate(-50%,-50%) scale(.93)}to{opacity:.09;transform:translate(-50%,-50%) scale(1)}}

/* ---------- aside ---------- */
.side{
  padding:22px 0 30px;font-family:"Fira Code",monospace;
}
@media (min-width:980px){.side{position:sticky;top:86px}}
.eyebrow{
  display:block;font-family:"Fira Code",monospace;font-size:11.5px;
  letter-spacing:.3em;line-height:1.6;color:var(--am);
}
.side-h{
  margin:.15em 0 .7em;font-size:18px;letter-spacing:.18em;
  color:#fff;font-weight:600;
}
.side-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:3px}
.side-list a{
  display:flex;align-items:center;min-height:42px;padding:4px 12px;
  border-left:2px solid transparent;border-radius:0 12px 12px 0;
  color:var(--mut);text-decoration:none;font-size:13.5px;line-height:1.4;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.side-list a:hover,.side-list a:focus-visible{
  color:var(--cy);border-left-color:var(--cy);background:rgba(34,211,238,.09);
}

/* ---------- article ---------- */
.body{min-width:0;padding:8px 0 68px}
.body div{
  padding:30px 0 24px;border-top:1px solid var(--line);
  scroll-margin-top:92px;
}
.body div:first-child{border-top:0;padding-top:14px}
.body h2{
  margin:0 0 .55em;font-size:clamp(22px,3.2vw,31px);line-height:1.32;
  letter-spacing:-.012em;color:#fff;
}
.body h3{margin:1.5em 0 .5em;font-size:clamp(19px,2.4vw,23px);line-height:1.4;color:#fff}
.body p{margin:0 0 1.05em;color:var(--tx)}
.body ul,.body ol{margin:0 0 1.05em;padding-left:1.3em;color:var(--tx)}
.body li{margin:.32em 0}
.body li::marker{color:var(--am)}
.body strong{color:var(--am);font-weight:600}
.body em{color:#fff;font-style:normal;border-bottom:1px dashed rgba(245,158,11,.6)}
.body a{color:var(--cy);text-underline-offset:3px;text-decoration-thickness:1px}
.body a:hover{color:var(--am)}
.body blockquote{
  margin:1.25em 0;padding:14px 18px;border-left:3px solid var(--am);
  background:rgba(245,158,11,.07);border-radius:0 14px 14px 0;color:var(--tx);
}
.body blockquote p:last-child{margin:0}
.body figure{margin:1.3em 0}
.body img{border-radius:var(--r);box-shadow:var(--shadow)}
.body small{
  display:block;font-family:"Fira Code",monospace;font-size:11.5px;
  letter-spacing:.26em;color:var(--am);margin-bottom:.4em;
}
.body hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.body code,.body pre{
  font-family:"Fira Code",monospace;font-size:14px;
  background:var(--panel);border-radius:10px;
}
.body code{padding:1px 6px}
.body pre{padding:14px 16px;overflow:auto;border:1px solid var(--line)}

.js-anim .body div{
  opacity:0;transform:translateY(20px);
  transition:opacity .62s cubic-bezier(.2,.7,.3,1),transform .62s cubic-bezier(.2,.7,.3,1);
}
.js-anim .body div.is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.ft{border-top:1px solid var(--line);margin-top:12px}
.ft-cta{
  max-width:1180px;margin:clamp(24px,4vw,44px) auto 0;padding:clamp(26px,5vw,52px) 18px;
  text-align:center;border-radius:var(--r);
  background:linear-gradient(160deg,rgba(34,211,238,.12),rgba(245,158,11,.1));
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.ft-cta .eyebrow{color:var(--am)}
.ft-big{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;margin-top:.25em;text-decoration:none;
  font-family:"Fira Code",monospace;font-weight:700;
  font-size:clamp(28px,7vw,62px);letter-spacing:.02em;line-height:1.2;
  background-image:linear-gradient(92deg,var(--cy),var(--am));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  transition:transform .25s ease;
}
.ft-big:hover{transform:translateY(-3px)}
.ft-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;max-width:1180px;margin:0 auto;
  padding:22px clamp(14px,3vw,30px);border-top:1px solid var(--line);
}
.ft-ad{
  font-style:normal;font-family:"Fira Code",monospace;font-size:13px;
  letter-spacing:.22em;color:var(--mut);
}
.ft-links{
  list-style:none;display:flex;flex-wrap:wrap;gap:4px 6px;
  margin:0;padding:0;
}
.ft-links a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 9px;
  color:var(--mut);text-decoration:none;font-size:13.5px;border-radius:9px;
  transition:color .18s ease,background .18s ease;
}
.ft-links a:hover,.ft-links a:focus-visible{color:var(--cy);background:rgba(34,211,238,.09)}
.ft-copy{
  text-align:center;color:var(--mut);
  font-family:"Fira Code",monospace;font-size:12.5px;
  padding:2px 14px 30px;
}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hd{grid-template-columns:1fr auto 1fr}
  .hd-nav{display:none}
  .brand{grid-column:2;justify-self:center}
  .hd-tools{grid-column:3;justify-self:end}
}
@media (max-width:560px){
  .find-q{display:none}
  .find-lg{display:block;margin-bottom:6px}
  .veil{padding:16px}
  .side{padding:16px 0 10px}
  .side-list{flex-direction:row;flex-wrap:wrap}
  .side-list a{border-left:0;border-bottom:2px solid transparent;border-radius:10px 10px 0 0;min-height:44px}
  .hero{min-height:auto;padding-top:34px;padding-bottom:30px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .ghost{opacity:.09;transform:translate(-50%,-50%)}
  .hero h1,.hero h1::after,.hero-desc,.hero-mark{opacity:1;clip-path:none;color:transparent}
  .hero h1::after{background:var(--am);opacity:1}
  .js-anim .body div{opacity:1;transform:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}