/* Astronex-World project page — static, dependency-free */

:root{
  --bg:#070b12;
  --bg-alt:#0a1019;
  --panel:#0e1622;
  --panel-2:#121c2b;
  --line:#1e2b3d;
  --ink:#e9eef6;
  --ink-soft:#a8b7cb;
  --ink-dim:#7d8ea6;
  --blue:#143c69;
  --cyan:#0d9ab8;
  --cyan-soft:#7fd8ee;
  --amber:#ffb457;
  --radius:16px;
  --wrap:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img,video{max-width:100%;display:block}
a{color:var(--cyan-soft);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:var(--mono);font-size:.88em;background:#16202f;border:1px solid var(--line);border-radius:6px;padding:.1em .38em}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:60;background:#fff;color:#000;padding:8px 14px;border-radius:8px}

/* ---------------------------- nav ---------------------------- */
.nav{position:sticky;top:0;z-index:40;backdrop-filter:blur(12px);background:rgba(7,11,18,.72);border-bottom:1px solid transparent;transition:border-color .2s,background .2s}
.nav.scrolled{border-bottom-color:var(--line);background:rgba(7,11,18,.92)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:650;letter-spacing:.01em}
.brand:hover{text-decoration:none}
.brand-mark{width:16px;height:16px;border-radius:5px;background:linear-gradient(135deg,var(--cyan),var(--blue));box-shadow:0 0 0 1px rgba(127,216,238,.35)}
.nav-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a{color:var(--ink-soft);font-size:14.5px}
.nav-links a:hover{color:var(--ink);text-decoration:none}

/* ---------------------------- hero ---------------------------- */
.hero{
  position:relative;padding:64px 0 56px;overflow:hidden;
  background:
    radial-gradient(1100px 520px at 78% -12%,rgba(13,154,184,.20),transparent 62%),
    radial-gradient(760px 420px at 8% 8%,rgba(20,60,105,.55),transparent 66%),
    var(--bg);
}
.hero-inner{text-align:center}
.eyebrow{margin:0 0 14px;font-size:12.5px;letter-spacing:.17em;text-transform:uppercase;color:var(--cyan-soft)}
.title{
  margin:0;font-size:clamp(42px,7.2vw,82px);line-height:1.02;letter-spacing:-.025em;font-weight:760;
  background:linear-gradient(120deg,#f4f9ff 20%,#9fd9ea 60%,#f4f9ff 92%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.subtitle{margin:16px auto 0;max-width:760px;font-size:clamp(16px,2.1vw,20px);color:#cfdced;font-weight:450}
.authors{margin:26px 0 4px;font-size:19px;font-weight:560}
.authors sup,.affil sup{font-size:.62em;color:var(--cyan-soft)}
.dot{color:var(--ink-dim);margin:0 8px}
.affil{margin:0;color:var(--ink-soft);font-size:14.5px}
.cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:26px 0 34px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;
  border:1px solid var(--line);background:var(--panel);color:var(--ink);font-size:14.5px;font-weight:540;
  transition:transform .15s,border-color .15s,background .15s;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);border-color:#2f4a68;background:var(--panel-2)}
.btn.primary{border-color:transparent;background:linear-gradient(135deg,var(--cyan),var(--blue));color:#fff}
.btn[data-todo]::after{content:"soon";font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-dim);border:1px solid var(--line);border-radius:999px;padding:1px 7px}

.hero-figure{margin:0}
.hero-figure{position:relative}
.hero-video{width:100%;border-radius:var(--radius);border:1px solid var(--line);background:#000;box-shadow:0 30px 80px -40px rgba(0,0,0,.9)}
.hero-figure figcaption{margin:16px auto 0;max-width:820px;color:var(--ink-soft);font-size:14.5px}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:#04121a;background:var(--cyan-soft);margin-right:10px}
.badge.live{background:linear-gradient(135deg,var(--cyan-soft),#bff0ff)}

.stat-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;list-style:none;margin:42px 0 0;padding:0;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat-strip li{background:var(--panel);padding:18px 14px;text-align:center}
.stat-strip b{display:block;font-size:22px;letter-spacing:-.01em}
.stat-strip span{display:block;margin-top:5px;font-size:12.5px;color:var(--ink-dim)}

/* --------------------------- sections --------------------------- */
.section{padding:76px 0;border-top:1px solid var(--line)}
.section.alt{background:var(--bg-alt)}
.section-head{max-width:900px;margin-bottom:36px}
.kicker{margin:0 0 10px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan-soft)}
.section-head h2{margin:0;font-size:clamp(26px,3.6vw,38px);line-height:1.18;letter-spacing:-.02em}
.lede{margin:16px 0 0;color:var(--ink-soft);font-size:16.5px;max-width:860px}
.note{color:var(--ink-dim);font-size:13.8px;margin:14px 0 0;max-width:960px}

.cols{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:start}
.analysis{grid-template-columns:1fr 1fr}

.abstract{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px}
.abstract h3{margin:0 0 12px;font-size:15px;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan-soft)}
.abstract p{margin:0;color:#d3dced;font-size:16px}
.abstract b{color:#fff}

.contrib{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.contrib li{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:12px;padding:16px 20px}
.contrib h3{margin:0 0 6px;font-size:16.5px}
.contrib p{margin:0;color:var(--ink-soft);font-size:15px}

.figure{margin:44px 0 0}
.figure img{width:100%;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
.figure figcaption{margin-top:14px;color:var(--ink-soft);font-size:14.5px;max-width:1000px}
.figure figcaption b{color:var(--ink)}

/* --------------------------- demos --------------------------- */
.group-title{margin:48px 0 18px;font-size:20px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.group-title span{font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-dim);font-weight:400}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.card{
  margin:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:zoom-in;transition:border-color .18s,transform .18s;
  position:relative;
}
.card:hover,.card:focus-visible{border-color:#31506f;transform:translateY(-2px);outline:none}
.card .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:#000}
.card figcaption{padding:18px 20px 20px}
.card h3{margin:0 0 8px;font-size:17.5px}
.card p{margin:0;color:var(--ink-soft);font-size:14.6px}
.meta{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 10px !important}
.meta span{font-size:11.5px;letter-spacing:.05em;color:var(--ink-dim);border:1px solid var(--line);border-radius:999px;padding:2px 9px;background:#0c1421}
.card .play{position:relative}

/* strict-autoplay fallback: shown only when the browser refuses muted autoplay */
.needs-gesture::after{
  content:"▶  Play";position:absolute;left:50%;z-index:3;transform:translate(-50%,-50%);
  padding:10px 22px;border-radius:999px;background:rgba(7,11,18,.8);border:1px solid rgba(127,216,238,.6);
  color:#eaf6ff;font-size:13.5px;letter-spacing:.04em;cursor:pointer;pointer-events:none;
}
.card.needs-gesture::after{top:32%}
.hero-figure.needs-gesture::after{top:46%}
.card.needs-gesture .thumb,
.hero-figure.needs-gesture .hero-video{filter:brightness(.6)}

/* --------------------------- tables --------------------------- */
.table-block{margin:40px 0 0}
.table-block h3{font-size:18px;margin:0 0 14px}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.table-scroll + .table-scroll{margin-top:18px}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
th,td{padding:11px 15px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:#101a28;color:var(--ink);font-size:13px;letter-spacing:.03em;text-transform:uppercase;font-weight:600;white-space:nowrap}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:none}
tbody th{color:var(--ink-soft);font-weight:520;white-space:nowrap}
td{color:#d5deec}
td b,th b{color:#fff}
tr.hl td{background:rgba(13,154,184,.10)}
table.dense{font-size:13.6px}
table.dense td,table.dense th{padding:10px 12px}
table.wide{min-width:900px}
.two-tables{display:grid;grid-template-columns:1fr;gap:8px}

.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.cards3 article{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.cards3 h3{margin:0 0 10px;font-size:17px;color:var(--cyan-soft)}
.cards3 p{margin:0;color:var(--ink-soft);font-size:15px}

.ticks{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.ticks li{position:relative;padding-left:26px;color:var(--ink-soft);font-size:15px}
.ticks li::before{content:"";position:absolute;left:4px;top:.62em;width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--cyan),var(--blue))}
.ticks b{color:var(--ink)}

.issues{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.issues li{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 20px;color:var(--ink-soft);font-size:15px}
.issues b{color:var(--ink);display:block;margin-bottom:4px}
.roadmap{background:linear-gradient(160deg,rgba(13,154,184,.14),rgba(20,60,105,.22));border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px}
.roadmap h3{margin:0 0 14px;font-size:20px}
.roadmap p{margin:0 0 14px;color:#d3dced;font-size:15.4px}
.roadmap .ticks li{color:#cfdcec}

.bib{position:relative}
pre{margin:0;background:#0b1320;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;overflow-x:auto}
pre code{background:none;border:none;padding:0;font-size:13.6px;line-height:1.62;color:#cfe0f2}
.copy{position:absolute;top:12px;right:12px;z-index:2;border:1px solid var(--line);background:var(--panel);color:var(--ink-soft);border-radius:8px;padding:6px 13px;font-size:12.5px;cursor:pointer}
.copy:hover{color:var(--ink);border-color:#31506f}
.copy.done{color:#0a1b13;background:var(--cyan-soft);border-color:transparent}

.footer{border-top:1px solid var(--line);padding:34px 0 46px;color:var(--ink-soft);font-size:14px;background:var(--bg-alt)}
.footer p{margin:0 0 6px}
.footer .muted{color:var(--ink-dim);font-size:13.2px}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;margin:12px 0 10px !important}
.foot-links a{font-size:14px}

.resources{margin-top:38px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px}
.resources h3{margin:0 0 14px;font-size:15px;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan-soft)}
.resources ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.resources li{display:flex;gap:16px;align-items:baseline;flex-wrap:wrap}
.resources li > span{min-width:112px;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-dim)}
.resources li a{font-size:15px;word-break:break-all}

/* --------------------------- lightbox --------------------------- */
.lightbox{position:fixed;inset:0;z-index:80;background:rgba(3,6,11,.94);display:flex;align-items:center;justify-content:center;padding:28px}
.lightbox[hidden]{display:none}
.lb-inner{width:min(1240px,100%)}
.lb-inner video{width:100%;border-radius:14px;background:#000;border:1px solid var(--line)}
.lb-caption{margin:14px 0 0;color:var(--ink-soft);font-size:14.5px}
.lb-close{position:absolute;top:20px;right:24px;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;padding:8px 18px;cursor:pointer;font-size:13.5px}
.lb-close:hover{border-color:#31506f}

/* --------------------------- motion --------------------------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

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

/* --------------------------- responsive --------------------------- */
@media (max-width:1000px){
  .cols,.analysis,.cards3,.grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:56px 0}
  .hero{padding:44px 0 40px}
  .stat-strip{grid-template-columns:1fr 1fr}
  .wrap{padding:0 18px}
  .abstract,.roadmap{padding:22px}
}