/* ============================================================
   native.build — amber (Java) + teal (native) → platinum (alloy)
   ============================================================ */

:root{
  --ink:#06090e;
  --ink-2:#0a0f16;
  --pane:#0b1018;
  --pane-2:#0d1520;
  --line:rgba(126,160,190,.16);
  --line-soft:rgba(126,160,190,.09);

  --text:#e8eef6;
  --muted:#94a5b8;
  --dim:#64758a;

  --java:#ff9d5c;
  --java-soft:rgba(255,157,92,.14);
  --native:#4ee0c8;
  --native-soft:rgba(78,224,200,.14);
  --alloy:#dbe7f0;

  --tok-str:#9fb3c4;
  --tok-num:#c3d2e0;
  --tok-com:#4e5d70;
  --tok-type:#cfdcea;

  --radius:14px;
  --maxw:1140px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* ---------- fluid background ---------- */

#fluid{
  position:fixed;
  inset:0;
  width:100vw;
  height:100vh;
  z-index:0;
  display:block;
  mix-blend-mode:screen;
  filter:blur(19px) saturate(1.12);
  opacity:.6;
  pointer-events:none;
  transform:translateZ(0);
}

.veil{
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:
    radial-gradient(120% 80% at 50% 0%,rgba(6,9,14,0) 0%,rgba(6,9,14,.35) 55%,rgba(6,9,14,.72) 100%),
    linear-gradient(180deg,rgba(6,9,14,.55) 0%,rgba(6,9,14,0) 18%,rgba(6,9,14,0) 82%,rgba(6,9,14,.7) 100%);
}

main,.nav,.foot{position:relative;z-index:2}

/* ---------- nav ---------- */

.nav{
  position:sticky;top:0;
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;
  padding:16px clamp(20px,4vw,48px);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  background:linear-gradient(180deg,rgba(6,9,14,.82),rgba(6,9,14,.42));
  border-bottom:1px solid var(--line-soft);
}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}

.mark{
  width:22px;height:22px;border-radius:50%;
  background:
    radial-gradient(circle at 33% 50%,var(--java) 0 34%,transparent 35%),
    radial-gradient(circle at 67% 50%,var(--native) 0 34%,transparent 35%);
  filter:blur(.3px) saturate(1.1);
}

.brand-text{font-weight:650;letter-spacing:-.015em;font-size:15px}
.brand-text .dot{color:var(--native)}
.brand-text.small{font-size:14px;color:var(--muted)}

.nav-links{display:flex;align-items:center;gap:clamp(14px,2vw,28px)}
.nav-links a{
  color:var(--muted);text-decoration:none;font-size:14px;letter-spacing:.01em;
  transition:color .18s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-gh{color:var(--alloy)!important}

/* ---------- layout ---------- */

.section{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(72px,11vw,140px) clamp(20px,4vw,48px);
}

.kicker{
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);margin:0 0 18px;
}

h1,h2,h3,h4{letter-spacing:-.025em;line-height:1.1;margin:0}

h2{font-size:clamp(28px,4.2vw,44px);font-weight:640;max-width:24ch}

.prose{
  color:var(--muted);
  font-size:clamp(16px,1.5vw,18px);
  max-width:64ch;
  margin:22px 0 0;
}

/* ---------- hero ---------- */

.hero{
  min-height:100svh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;
  padding:120px clamp(20px,4vw,48px) 96px;
  position:relative;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:7px 16px;
  margin:0 0 clamp(24px,4vw,38px);
  background:rgba(10,15,22,.5);
  backdrop-filter:blur(8px);
}

.pulse{
  width:6px;height:6px;border-radius:50%;
  background:var(--native);
  box-shadow:0 0 0 0 rgba(78,224,200,.55);
  animation:pulse 2.6s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(78,224,200,.5)}
  70%{box-shadow:0 0 0 9px rgba(78,224,200,0)}
  100%{box-shadow:0 0 0 0 rgba(78,224,200,0)}
}

h1{
  font-size:clamp(44px,9vw,104px);
  font-weight:660;
  letter-spacing:-.04em;
  line-height:.98;
}
h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--java) 0%,var(--alloy) 46%,var(--native) 100%);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
}

.lede{
  color:var(--muted);
  font-size:clamp(16px,1.9vw,20px);
  max-width:58ch;
  margin:clamp(22px,3vw,30px) 0 0;
}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:clamp(28px,4vw,40px)}

.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:12px 22px;border-radius:999px;
  border:1px solid var(--line);
  color:var(--text);text-decoration:none;
  font-size:14.5px;font-weight:520;
  background:rgba(12,18,26,.6);
  backdrop-filter:blur(10px);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.btn:hover{border-color:rgba(126,160,190,.34);transform:translateY(-1px);background:rgba(16,24,34,.75)}
.btn-primary{
  border-color:transparent;
  color:#06090e;font-weight:620;
  background:linear-gradient(100deg,var(--java),var(--alloy) 52%,var(--native));
}
.btn-primary:hover{background:linear-gradient(100deg,var(--java),#fff 52%,var(--native))}

.prerelease{
  margin:clamp(26px,4vw,36px) 0 0;
  font-size:12.5px;letter-spacing:.05em;
  color:var(--dim);
}

.scroll-cue{
  position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  width:1px;height:52px;
  background:linear-gradient(180deg,transparent,var(--line));
  overflow:hidden;
}
.scroll-cue span{
  position:absolute;top:0;left:0;width:1px;height:16px;
  background:linear-gradient(180deg,transparent,var(--native));
  animation:drop 2.4s var(--ease) infinite;
}
@keyframes drop{0%{transform:translateY(-18px)}70%,100%{transform:translateY(56px)}}

/* ---------- stats ---------- */

.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:1px;margin-top:clamp(40px,6vw,64px);
  background:var(--line-soft);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  overflow:hidden;
}
.stat{background:rgba(9,13,20,.72);padding:26px 24px;backdrop-filter:blur(8px)}
.stat-key{
  display:block;
  font:13.5px/1.4 ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,monospace;
  color:var(--alloy);margin-bottom:10px;letter-spacing:-.01em;
}
.stat p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.6}

/* ---------- cases ---------- */

.case{margin-top:clamp(56px,8vw,96px)}
.case-head{max-width:66ch}
.case-head h3{
  font-size:clamp(21px,2.6vw,28px);font-weight:620;
  display:flex;align-items:baseline;gap:14px;
}
.num{
  font:12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  color:var(--dim);letter-spacing:.1em;
}
.case-head p{color:var(--muted);margin:12px 0 0;font-size:15.5px;max-width:62ch}
.case-head code,.prose code{
  font:.92em/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  background:rgba(126,160,190,.1);
  border-radius:5px;padding:2px 6px;color:var(--alloy);
}

.split{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:start;      /* panes size to their content, no dead space */
  gap:0;
  margin-top:26px;
}

.fuse{
  align-self:stretch;
  width:clamp(18px,3vw,44px);
  background:
    linear-gradient(180deg,transparent,rgba(255,157,92,.16) 30%,rgba(78,224,200,.16) 70%,transparent);
  mask-image:linear-gradient(180deg,transparent,#000 22%,#000 78%,transparent);
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 22%,#000 78%,transparent);
}

.stack{display:flex;flex-direction:column;gap:14px;min-width:0}

.single{margin-top:26px}

.pane{
  margin:0;
  background:var(--pane);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  min-width:0;
  box-shadow:0 24px 60px -30px rgba(0,0,0,.9);
}
.pane-wide{max-width:760px;margin:0 auto}

.pane[data-side="java"]{border-top:1px solid rgba(255,157,92,.34)}
.pane[data-side="native"]{border-top:1px solid rgba(78,224,200,.34)}
.pane[data-side="fuse"]{border-top:1px solid rgba(219,231,240,.3)}

figcaption{
  display:flex;align-items:center;gap:10px;
  padding:11px 16px;
  border-bottom:1px solid var(--line-soft);
  background:var(--pane-2);
  font-size:12.5px;
}

.tabs{gap:8px}
.tab{
  appearance:none;
  border:1px solid transparent;
  background:none;
  color:var(--dim);
  font:12px/1 ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,monospace;
  padding:5px 10px;
  border-radius:6px;
  cursor:pointer;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.tab:hover{color:var(--text)}
.tab:focus-visible{outline:2px solid var(--native);outline-offset:2px}
.tab.is-active{
  color:var(--alloy);
  background:rgba(126,160,190,.1);
  border-color:var(--line);
}

/* Both panes share one grid cell, so the box is as tall as the taller of
   the two and switching tabs never shifts the page. */
.tabpanes{display:grid}
.tabpanes > .tabpane{grid-area:1 / 1;visibility:hidden;opacity:0;transition:opacity .16s var(--ease)}
.tabpanes > .tabpane.is-active{visibility:visible;opacity:1}

.tag{
  font:11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing:.08em;text-transform:uppercase;
  padding:4px 8px;border-radius:5px;
}
.tag-java{color:var(--java);background:var(--java-soft)}
.tag-native{color:var(--native);background:var(--native-soft)}
.tag-fuse{color:var(--alloy);background:rgba(219,231,240,.1)}
.file{color:var(--dim);font:12px/1 ui-monospace,SFMono-Regular,Menlo,monospace}

pre{
  margin:0;padding:20px 18px;
  overflow-x:auto;
  font:13px/1.72 ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,monospace;
  tab-size:4;
}
pre::-webkit-scrollbar{height:8px}
pre::-webkit-scrollbar-thumb{background:rgba(126,160,190,.2);border-radius:4px}
code{font:inherit;color:#c8d6e4}

/* syntax — tinted by which side of the boundary the code lives on */
.tok-com{color:var(--tok-com);font-style:italic}
.tok-str{color:var(--tok-str)}
.tok-num{color:var(--tok-num)}
.tok-type{color:var(--tok-type)}
.tok-kw{color:#8fa7c4}
.tok-ann{color:#8fa7c4;font-weight:600}
[data-side="java"] .tok-kw{color:#e59a68}
[data-side="java"] .tok-ann{color:var(--java)}
[data-side="native"] .tok-kw{color:#4fc4b2}
[data-side="native"] .tok-ann{color:var(--native)}
[data-side="fuse"] .tok-kw{color:#b9c9da}
[data-side="fuse"] .tok-ann{color:var(--alloy)}

/* ---------- grid ---------- */

.grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:1px;margin-top:clamp(36px,5vw,56px);
  background:var(--line-soft);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  overflow:hidden;
}
.cell{background:rgba(9,13,20,.74);padding:24px 22px;backdrop-filter:blur(8px)}
.cell h4{font-size:15px;font-weight:620;margin-bottom:8px;color:var(--alloy)}
.cell p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}

/* ---------- closing ---------- */

.closing{text-align:center;padding-bottom:clamp(90px,12vw,160px)}
.closing h2{margin:0 auto;max-width:none}
.closing .prose{margin-left:auto;margin-right:auto}

.coords{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:32px}
.coord{
  display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);border-radius:10px;
  padding:10px 16px;background:rgba(11,16,24,.6);
  backdrop-filter:blur(8px);
}
.coord-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim)}
.coord code{font:13px/1 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--alloy)}

/* ---------- footer ---------- */

.foot{border-top:1px solid var(--line-soft);background:rgba(6,9,14,.7);backdrop-filter:blur(12px)}
.foot-inner{
  max-width:var(--maxw);margin:0 auto;
  padding:26px clamp(20px,4vw,48px);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
}
.foot-links a{color:var(--muted);text-decoration:none;font-size:13.5px}
.foot-links a:hover{color:var(--text)}

/* ---------- reveal ---------- */

.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */

@media (max-width:900px){
  .split{grid-template-columns:1fr;gap:14px}
  .fuse{
    width:auto;height:24px;
    background:linear-gradient(90deg,transparent,rgba(255,157,92,.18) 30%,rgba(78,224,200,.18) 70%,transparent);
    mask-image:linear-gradient(90deg,transparent,#000 22%,#000 78%,transparent);
    -webkit-mask-image:linear-gradient(90deg,transparent,#000 22%,#000 78%,transparent);
  }
  .nav-links a:not(.nav-gh){display:none}
  #fluid{filter:blur(26px) saturate(1.1);opacity:.5}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .pulse,.scroll-cue span{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}