/* ---------------------------------------------------------------------------
   site-chrome.css - the header, the rails and the footer of the homepage.
   Same tokens as labs-ui.css, so the shell and the lab directory read as one
   page instead of a frame inside a frame.
   --------------------------------------------------------------------------- */
:root{
  --bg:#070b12; --bg2:#0c131e; --card:#111a27; --card2:#162132;
  --line:#1f2e42; --line2:#2b3f59;
  --ink:#e8f0fb; --mute:#90a4bf; --dim:#64788f;
  --accent:#36c3ff; --accent2:#7b5cff; --gold:#ffc53d; --green:#3ddc84; --pink:#ff4d8d;
  --radius:14px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:15px;line-height:1.6;
  background-image:radial-gradient(1100px 560px at 12% -8%,rgba(54,195,255,.10),transparent 60%),
                   radial-gradient(900px 500px at 88% 0%,rgba(123,92,255,.10),transparent 55%);
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
img{max-width:100%;height:auto}

/* ---------------- header ---------------- */
.hx-head{position:sticky;top:0;z-index:200;background:rgba(7,11,18,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.hx-head .bar{max-width:1500px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:10px}
.hx-brand{display:flex;align-items:center;gap:10px;font-weight:760;letter-spacing:-.02em;font-size:17px;color:var(--ink);white-space:nowrap}
.hx-brand:hover{text-decoration:none;color:var(--ink)}
.hx-brand .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px var(--accent)}

.hx-nav{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1;flex-wrap:wrap}
.hx-nav a.top,.hx-nav summary{
  display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:10px;
  font-size:14px;font-weight:600;color:var(--mute);cursor:pointer;white-space:nowrap;
  border:1px solid transparent;list-style:none;
}
.hx-nav summary::-webkit-details-marker{display:none}
.hx-nav summary::after{content:"";width:5px;height:5px;margin-left:2px;border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px);opacity:.7}
.hx-nav a.top:hover,.hx-nav summary:hover{color:var(--ink);background:var(--card);text-decoration:none}
.hx-nav details[open]>summary{color:var(--ink);background:var(--card);border-color:var(--line2)}
.hx-nav a.top.cta{color:var(--accent);border-color:rgba(54,195,255,.35);background:rgba(54,195,255,.08)}
.hx-nav a.top.cta:hover{background:rgba(54,195,255,.16)}

.hx-nav details{position:relative}
.hx-panel{
  position:absolute;left:0;top:calc(100% + 8px);z-index:210;
  background:var(--bg2);border:1px solid var(--line2);border-radius:var(--radius);
  box-shadow:0 24px 60px rgba(0,0,0,.6);padding:16px;
  display:grid;gap:18px;grid-template-columns:repeat(var(--cols,3),minmax(190px,1fr));
  max-width:min(92vw,900px);max-height:min(74vh,640px);overflow:auto;
}
.hx-panel.wide{--cols:4;max-width:min(94vw,1080px)}
.hx-col h4{margin:0 0 8px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);font-weight:700}
.hx-col a{display:block;padding:5px 8px;border-radius:8px;font-size:14px;color:var(--ink);line-height:1.35}
.hx-col a:hover{background:var(--card2);text-decoration:none;color:var(--accent)}
.hx-col .new{color:var(--pink);font-size:10px;font-weight:800;letter-spacing:.04em;margin-left:5px;vertical-align:1px}

.hx-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.hx-actions a{font-size:13.5px;color:var(--mute);padding:8px 10px;border-radius:9px;white-space:nowrap}
.hx-actions a:hover{color:var(--ink);background:var(--card);text-decoration:none}
.hx-actions a.search{border:1px solid var(--line2);color:var(--ink);background:var(--card)}
.hx-burger{display:none;margin-left:auto;background:var(--card);border:1px solid var(--line2);color:var(--ink);
  border-radius:10px;padding:8px 11px;font:inherit;font-size:14px;cursor:pointer}

/* ---------------- page frame ---------------- */
.hx-page{max-width:1500px;margin:0 auto;padding:0 20px 10px;display:grid;gap:18px;
  grid-template-columns:200px minmax(0,1fr) 220px;align-items:start}
.hx-rail{position:sticky;top:72px;display:grid;gap:14px}
.hx-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.hx-card h4{margin:0 0 10px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);font-weight:700}
.hx-card a{display:block;padding:4px 0;font-size:13.5px;color:var(--mute)}
.hx-card a:hover{color:var(--accent);text-decoration:none}
.hx-sponsor{display:grid;gap:12px;align-items:center}
.hx-sponsor a{display:flex;align-items:center;justify-content:center;min-height:52px;padding:8px;
  background:#0b1220;border:1px solid var(--line);border-radius:10px}
.hx-sponsor a:hover{border-color:var(--line2)}
.hx-sponsor img{max-height:38px;width:auto;object-fit:contain}
.hx-donate{text-align:center}
.hx-donate p{margin:0 0 8px;font-size:12.5px;color:var(--dim)}

/* ---------------- footer ---------------- */
.hx-foot{border-top:1px solid var(--line);margin-top:40px;background:rgba(7,11,18,.6)}
.hx-foot .inner{max-width:1500px;margin:0 auto;padding:30px 20px 18px;
  display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.hx-foot h4{margin:0 0 9px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);font-weight:700}
.hx-foot p{margin:0 0 8px;color:var(--mute);font-size:13.5px;max-width:46ch}
.hx-foot a{color:var(--mute);font-size:13.5px}
.hx-foot a:hover{color:var(--accent);text-decoration:none}
.hx-foot .links{display:grid;gap:5px}
.hx-foot .bottom{border-top:1px solid var(--line);margin-top:6px}
.hx-foot .bottom .inner{padding:14px 20px 26px;display:flex;gap:14px;justify-content:space-between;flex-wrap:wrap;
  color:var(--dim);font-size:13px}

@media (max-width:1180px){
  .hx-page{grid-template-columns:minmax(0,1fr) 220px}
  .hx-page .hx-rail.left{display:none}
}
@media (max-width:860px){
  .hx-burger{display:block}
  /* the bar has to wrap, otherwise the open nav is laid out off the right edge */
  .hx-head .bar{flex-wrap:wrap}
  .hx-nav{display:none;order:3;flex:1 0 100%;width:100%;flex-direction:column;align-items:stretch;gap:4px;padding:8px 0 4px}
  .hx-panel{width:100%}
  .hx-nav.open{display:flex}
  .hx-nav a.top,.hx-nav summary{width:100%}
  .hx-panel{position:static;max-width:none;grid-template-columns:1fr;box-shadow:none;margin-top:6px}
  .hx-actions{order:2}
  .hx-page{grid-template-columns:minmax(0,1fr)}
  .hx-page .hx-rail{position:static}
  .hx-page .hx-rail.right{order:3}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}