*,*::before,*::after{box-sizing:border-box}

:root{
  --ink-950:#04121F;
  --ink-800:#0A2238;
  --ink-700:#0E2C45;
  --ink-600:#123A55;
  --cyan-400:#19F5D0;
  --cyan-600:#00BFA8;
  --gold-400:#F2B84B;
  --orange-500:#FF7A3D;
  --mint-300:#6EF3B8;
  --paper-50:#F6FAF5;
  --steel-400:#9FB1BF;
  --indigo-500:#4356D6;

  --font-sans:system-ui,-apple-system,"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:rgba(159,177,191,.22);
  --line-cyan:rgba(25,245,208,.32);
  --line-gold:rgba(242,184,75,.42);

  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --radius-pill:999px;

  --shadow-island:0 14px 38px rgba(2,8,14,.55);
  --shadow-paper:0 18px 46px rgba(2,8,14,.42);

  --wrap:1160px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink-950);
  color:var(--paper-50);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4,h5,h6{margin:0 0 .55em;font-weight:800;line-height:1.22;letter-spacing:-.012em}
h1{font-size:clamp(2rem,4.4vw,3.4rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:clamp(1.12rem,1.7vw,1.4rem)}
p{margin:0 0 1em;max-width:44em}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin-bottom:.35em}
a{color:var(--cyan-400);text-underline-offset:3px}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit}

:focus-visible{
  outline:2px solid var(--gold-400);
  outline-offset:3px;
  border-radius:4px;
}

.wrap{
  width:min(var(--wrap),calc(100% - (var(--gutter) * 2)));
  margin-inline:auto;
}

.mono{font-family:var(--font-mono);letter-spacing:.06em}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-400);
  margin:0 0 14px;
}
.lede{
  font-size:clamp(1rem,1.3vw,1.15rem);
  line-height:1.75;
  color:var(--steel-400);
  max-width:40em;
}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:400;
  transform:translateY(-220%);
  padding:11px 20px;
  border-radius:var(--radius-pill);
  background:var(--cyan-400);
  color:var(--ink-950);
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  transition:transform .25s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg,#04121F 0%,#061A2C 100%);
  border-bottom:1px solid var(--line-cyan);
  isolation:isolate;
}

.topbar__inner{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:16px;
  padding-block:9px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:var(--paper-50);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:0 0 34px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--cyan-400),var(--cyan-600));
  color:var(--ink-950);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.04em;
  transform:rotate(-3deg);
  box-shadow:inset 0 0 0 1px rgba(4,18,31,.45),0 6px 16px rgba(0,191,168,.28);
}
.brand__name{
  display:flex;
  flex-direction:column;
  gap:1px;
  font-size:16px;
  font-weight:800;
  line-height:1.15;
  letter-spacing:.01em;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--steel-400);
}

.topbar__shortcuts{justify-self:center;display:flex;align-items:center;gap:8px}

.pill-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 18px;
  border-radius:var(--radius-pill);
  background:var(--cyan-400);
  color:var(--ink-950);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 6px 18px rgba(25,245,208,.26);
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.pill-link:hover,.pill-link:focus-visible{
  background:var(--paper-50);
  transform:translateY(-1px);
  box-shadow:0 10px 24px rgba(25,245,208,.34);
}

.topbar__utility{justify-self:end;display:flex;align-items:center;gap:6px}

.util-link{
  padding:6px 13px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--steel-400);
  font-size:13px;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.util-link:hover,.util-link:focus-visible{
  color:var(--paper-50);
  background:rgba(25,245,208,.1);
}
.util-link--ghost{
  color:var(--paper-50);
  border-color:var(--line);
}
.util-link--ghost:hover,.util-link--ghost:focus-visible{
  color:var(--cyan-400);
  border-color:var(--cyan-400);
  background:rgba(25,245,208,.08);
}

/* ---------- capsule nav ---------- */
.capsule-nav{
  display:flex;
  justify-content:center;
  padding:4px 0 12px;
}
.capsule-nav__inner{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  width:min(var(--wrap),calc(100% - (var(--gutter) * 2)));
  padding:6px 8px;
  border:1px solid var(--ink-600);
  border-radius:var(--radius-pill);
  background:linear-gradient(180deg,rgba(18,58,85,.94),rgba(10,34,56,.97));
  box-shadow:var(--shadow-island);
  backdrop-filter:blur(8px);
}
.capsule-nav__tag{
  display:none;
  padding-left:14px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--steel-400);
}
.capsule-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.capsule-nav__list li{margin:0}
.capsule-nav__link{
  display:block;
  padding:9px 16px;
  border-radius:var(--radius-pill);
  color:var(--steel-400);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.capsule-nav__link:hover,.capsule-nav__link:focus-visible{
  color:var(--paper-50);
  background:rgba(25,245,208,.12);
}
.capsule-nav__link[aria-current="page"]{
  color:var(--ink-950);
  background:linear-gradient(135deg,var(--cyan-400),var(--cyan-600));
  box-shadow:0 0 0 1px rgba(25,245,208,.55),0 6px 18px rgba(0,191,168,.3);
}
.capsule-nav__link[aria-current="page"]:hover{
  color:var(--ink-950);
  background:linear-gradient(135deg,var(--cyan-400),var(--cyan-600));
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  border:1px solid var(--ink-600);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--paper-50);
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--cyan-400);color:var(--cyan-400)}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:11px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.capsule-nav[data-open] .nav-toggle__bars::before{transform:translateY(4.5px) rotate(45deg)}
.capsule-nav[data-open] .nav-toggle__bars::after{transform:translateY(-4.5px) rotate(-45deg)}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  display:block;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan-600),var(--cyan-400) 62%,var(--gold-400));
  pointer-events:none;
  z-index:6;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover,.btn:focus-visible{transform:translateY(-2px)}
.btn--primary{background:var(--cyan-400);color:var(--ink-950);box-shadow:0 8px 22px rgba(25,245,208,.24)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--paper-50)}
.btn--gold{background:var(--gold-400);color:var(--ink-950);box-shadow:0 8px 22px rgba(242,184,75,.24)}
.btn--gold:hover,.btn--gold:focus-visible{background:#FFD27A}
.btn--ghost{border-color:var(--ink-600);background:rgba(25,245,208,.06);color:var(--paper-50)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--cyan-400);color:var(--cyan-400)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel-400);
  margin-bottom:20px;
}
.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumbs__list li{margin:0}
.breadcrumbs__list li + li::before{
  content:"/";
  margin:0 9px;
  color:var(--ink-600);
}
.breadcrumbs a{color:var(--steel-400);text-decoration:none}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--cyan-400)}
.breadcrumbs [aria-current="page"]{color:var(--paper-50)}

/* ---------- sections & panels ---------- */
.section{padding-block:clamp(40px,7vw,88px)}
.section--narrow{width:min(760px,100%)}
.section--wide{width:100%}

.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  border:1px solid var(--ink-600);
  border-radius:var(--radius-lg);
  background:var(--ink-800);
  color:var(--paper-50);
}
.panel--paper{
  background:var(--paper-50);
  color:var(--ink-950);
  border-color:rgba(4,18,31,.14);
}
.panel--paper a{color:var(--ink-600)}
.panel--paper .eyebrow{color:var(--cyan-600)}
.panel--paper .lede{color:#3B5568}
.panel--floating{box-shadow:var(--shadow-paper)}

.stack-panel{position:relative;isolation:isolate}
.stack-panel::after{
  content:"";
  position:absolute;
  inset:12px -12px -12px 12px;
  border:1px solid var(--line-cyan);
  border-radius:var(--radius-lg);
  z-index:-1;
  pointer-events:none;
}
.stack-panel--gold::after{border-color:var(--line-gold)}

/* ---------- grids ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:880px){
  .grid--2,.grid--3{grid-template-columns:1fr}
}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(25,245,208,.06);
  color:var(--steel-400);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  white-space:nowrap;
}
.tag--cyan{
  color:var(--cyan-400);
  border-color:var(--line-cyan);
  background:rgba(25,245,208,.1);
}
.tag--gold{
  color:var(--gold-400);
  border-color:var(--line-gold);
  background:rgba(242,184,75,.1);
}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--ink-600);
  border-radius:var(--radius-md);
  background:
    linear-gradient(135deg,rgba(25,245,208,.1),transparent 52%),
    linear-gradient(180deg,var(--ink-800),var(--ink-950));
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(180deg,rgba(246,250,245,.05) 0 1px,transparent 1px 5px);
  pointer-events:none;
}
.media-frame img,
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
  position:relative;
  z-index:1;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:12px 14px;
  background:linear-gradient(180deg,transparent,rgba(4,18,31,.92));
  color:var(--paper-50);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
}

/* ---------- version rail ---------- */
.version-rail{
  padding:18px 16px;
  border:1px solid var(--ink-600);
  border-radius:var(--radius-md);
  background:linear-gradient(180deg,rgba(18,58,85,.7),rgba(10,34,56,.9));
}
.version-rail__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--steel-400);
}
.version-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px}
.version-item{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-size:12px;
  color:var(--steel-400);
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.version-item:hover{border-color:var(--line-cyan);color:var(--paper-50)}
.version-item--active{
  border-color:var(--line-cyan);
  background:rgba(25,245,208,.08);
  color:var(--paper-50);
}
.version-item__code{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--cyan-400);
}
.version-item__name{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.version-item__tag{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.12em;
  color:var(--gold-400);
  border:1px solid var(--line-gold);
  border-radius:var(--radius-pill);
  padding:1px 7px;
}
.version-rail__hint{
  margin:12px 0 0;
  font-size:11px;
  line-height:1.6;
  color:var(--steel-400);
}

/* ---------- reveal ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-950);
  border-top:1px solid var(--ink-600);
  color:var(--paper-50);
  padding-top:clamp(36px,5vw,64px);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(20px,3.2vw,44px);
  align-items:start;
}
.footer__brand{display:flex;flex-direction:column;gap:14px;max-width:36ch}
.brand--footer{align-items:flex-start}
.footer__lede{
  margin:0;
  font-size:14px;
  line-height:1.72;
  color:var(--steel-400);
  max-width:30ch;
}
.footer__stamp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  margin:0;
  padding:5px 13px;
  border:1px solid var(--line-gold);
  border-radius:var(--radius-pill);
  color:var(--gold-400);
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.14em;
}
.footer__stamp-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--gold-400);
  box-shadow:0 0 0 3px rgba(242,184,75,.18);
}
.footer__col{min-width:0}
.footer__col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--steel-400);
}
.footer__links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer__links li{margin:0}
.footer__links a{
  display:inline-block;
  color:var(--paper-50);
  font-size:14px;
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__links a:hover,.footer__links a:focus-visible{color:var(--cyan-400);transform:translateX(3px)}
.footer__meta{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.footer__meta li{margin:0;display:flex;flex-direction:column;gap:2px}
.footer__meta-key{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel-400);
}
.footer__meta-val{font-size:13.5px;line-height:1.55;color:var(--paper-50);word-break:break-word}
.footer__col--contact .footer__meta-val{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em}

.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,48px);
  padding-block:18px 22px;
  border-top:1px solid var(--ink-600);
  font-size:12px;
  color:var(--steel-400);
}
.footer__legal{
  margin:0;
  font-family:var(--font-mono);
  letter-spacing:.05em;
}
.footer__note{
  margin:0;
  max-width:52ch;
  line-height:1.65;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:1 / -1;max-width:none}
}

@media (max-width:900px){
  .topbar__inner{
    grid-template-columns:1fr auto;
    grid-template-areas:
      "brand utility"
      "shortcuts shortcuts";
    row-gap:8px;
    padding-block:10px;
  }
  .brand{grid-area:brand}
  .topbar__utility{grid-area:utility}
  .topbar__shortcuts{grid-area:shortcuts;justify-self:start}

  .capsule-nav{padding:2px 0 10px}
  .capsule-nav__inner{
    flex-wrap:wrap;
    justify-content:space-between;
    padding:8px;
    border-radius:20px;
    gap:0;
  }
  .capsule-nav__tag{display:block}
  .nav-toggle{display:inline-flex}
  .capsule-nav__list{
    display:none;
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:8px 0 2px;
  }
  .capsule-nav[data-open] .capsule-nav__list{display:flex}
  .capsule-nav__link{
    padding:12px 16px;
    border-radius:12px;
    font-size:15px;
  }
}

@media (max-width:640px){
  .footer__grid{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .brand__sub{display:none}
  .topbar__utility{gap:2px}
  .util-link{padding:6px 10px;font-size:12.5px}
  .pill-link{padding:6px 14px;font-size:11px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none;transition:none}
}