/* HAQAGen project page
   Plain CSS, no build tools. Drop into GitHub Pages and go. */

:root{
  --bg: #0b1020;
  --bg2: #0a0f1b;
  --text: #e8eefc;
  --muted: rgba(232,238,252,.72);
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.08);
  --stroke: rgba(255,255,255,.12);
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --radius: 18px;
  --radius2: 26px;
  --pad: 18px;
  --max: 1120px;
  --brandA: #7dd3fc;
  --brandB: #a78bfa;
  --brandC: #34d399;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --display: "Space Grotesk", var(--sans);
}

html[data-theme="light"]{
  --bg: #f6f7fb;
  --bg2: #ffffff;
  --text: #0b1020;
  --muted: rgba(11,16,32,.7);
  --card: rgba(11,16,32,.05);
  --card2: rgba(11,16,32,.08);
  --stroke: rgba(11,16,32,.12);
  --shadow: 0 20px 60px rgba(11,16,32,.12);
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  overflow-x: hidden;
}

a{color: inherit; text-decoration: none;}
a:hover{opacity:.9;}

.container{
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.muted{color: var(--muted);}
.mono{font-family: var(--mono);}
.lead{font-size: 1.05rem;}
.pill{
  display:inline-flex; gap:8px; align-items:center;
  padding: 7px 12px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(125,211,252,.16), rgba(167,139,250,.12));
  font-size: .9rem;
}

.bg{position:fixed; inset:0; z-index:-1; pointer-events:none;}
.bg__grid{
  position:absolute; inset:-20%;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 72px 72px;
  transform: rotate(10deg);
  opacity: .14;
}
html[data-theme="light"] .bg__grid{opacity:.08;}

.bg__glow{
  position:absolute; width: 800px; height: 800px;
  filter: blur(80px);
  opacity: .5;
  border-radius: 999px;
}
.bg__glow--a{
  left:-240px; top:-260px;
  background: radial-gradient(circle at 30% 30%, rgba(125,211,252,.9), transparent 55%),
              radial-gradient(circle at 60% 40%, rgba(167,139,250,.75), transparent 55%);
}
.bg__glow--b{
  right:-260px; bottom:-320px;
  background: radial-gradient(circle at 30% 30%, rgba(52,211,153,.65), transparent 55%),
              radial-gradient(circle at 70% 50%, rgba(167,139,250,.5), transparent 55%);
}

.bg__grain{
  position:absolute; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.28'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  opacity: .08;
}

.nav{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(10,15,27,.55);
  border-bottom: 1px solid var(--stroke);
}
html[data-theme="light"] .nav{background: rgba(246,247,251,.7);}

.nav__inner{
  display:flex; align-items:center; justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}
.brand{
  display:flex; flex-direction:column;
  gap: 2px;
  min-width: 240px;
}
.brand__mark{
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: .2px;
}
.brand__sub{
  font-size: .85rem;
  color: var(--muted);
}

.nav__links{
  display:flex; align-items:center; gap: 18px;
  color: var(--muted);
  font-size: .95rem;
}
.nav__links a{padding: 8px 10px; border-radius: 10px;}
.nav__links a:hover{background: var(--card); color: var(--text);}

.nav__actions{display:flex; align-items:center; gap:10px;}

.iconbtn{
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: var(--card);
  color: var(--text);
  display:grid; place-items:center;
  cursor:pointer;
}
.iconbtn svg{width: 20px; height: 20px;}

.nav__burger{display:none; flex-direction:column; gap:4px; padding: 10px;}
.nav__burger span{display:block; width: 18px; height: 2px; background: currentColor; border-radius: 2px;}

.nav__mobile{
  padding: 10px 20px 16px 20px;
  display:flex; flex-direction:column; gap: 8px;
  border-top: 1px solid var(--stroke);
}
.nav__mobile a{color: var(--muted); padding: 10px 10px; border-radius: 10px;}
.nav__mobile a:hover{background: var(--card); color: var(--text);}

.hero{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 26px;
  padding: 44px 0 16px;
  align-items: start;
}
.hero__title{
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.08;
  margin: 12px 0 10px;
  font-size: clamp(2.0rem, 4vw, 3.1rem);
}
.hero__authors{margin:0; color: var(--muted);}
.hero__affil{margin: 6px 0 12px; color: var(--muted);}

.hero__tagline{
  font-size: 1.05rem;
  margin: 12px 0 18px;
}

.cta{display:flex; flex-wrap:wrap; gap: 10px; margin: 12px 0 18px;}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid var(--stroke);
  background: var(--card);
  color: var(--text);
  font-weight: 600;
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn:hover{transform: translateY(-1px); background: var(--card2);}
.btn--primary{
  background: linear-gradient(135deg, rgba(125,211,252,.2), rgba(167,139,250,.18));
  border-color: rgba(125,211,252,.28);
}
.btn--small{padding: 9px 12px; border-radius: 12px; font-size:.92rem;}

.kpis{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.kpi{
  padding: 14px 14px;
  border: 1px solid var(--stroke);
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.kpi__num{
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.25rem;
}
.kpi__lbl{color: var(--muted); font-size: .88rem; margin-top: 3px;}

.section{padding: 54px 0 10px;}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.section__head h2{
  margin:0;
  font-family: var(--display);
  letter-spacing: .2px;
  font-size: 2.0rem;
}
.section__head p{margin:0; max-width: 680px;}

.section__subhead{margin-top: 22px; margin-bottom: 12px;}
.section__subhead h3{margin:0; font-family: var(--display); font-size: 1.4rem;}
.section__subhead p{margin: 6px 0 0;}

.grid2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.card{
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius2);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card h3{
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1.25rem;
}
.card p{margin: 10px 0;}
.bullets{padding-left: 18px; margin: 10px 0;}
.bullets li{margin: 8px 0; color: var(--muted);}
.bullets strong{color: var(--text);}

.figure{
  margin: 0;
}
.figure__img{
  width: 100%;
  display:block;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,.08);
  box-shadow: var(--shadow);
  cursor: zoom-in;
}
.figure__cap{
  margin-top: 10px;
  color: var(--muted);
  font-size: .92rem;
}

.tabs{
  display:flex; flex-wrap:wrap; gap: 8px;
  margin: 8px 0 14px;
}
.tab{
  padding: 9px 10px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-weight: 600;
  cursor:pointer;
}
.tab:hover{background: rgba(255,255,255,.06); color: var(--text);}
.tab.is-active{
  background: linear-gradient(135deg, rgba(125,211,252,.18), rgba(167,139,250,.14));
  color: var(--text);
  border-color: rgba(125,211,252,.28);
}

.tabpanes{margin-top: 4px;}
.tabpane{display:none;}
.tabpane.is-active{display:block;}

.math{
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,.10);
  overflow-x: auto;
}
html[data-theme="light"] .math{background: rgba(11,16,32,.04);}

.callout{
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: var(--radius2);
  border: 1px solid rgba(52,211,153,.22);
  background: linear-gradient(135deg, rgba(52,211,153,.12), rgba(125,211,252,.08));
  box-shadow: var(--shadow);
}
.callout__title{font-family: var(--display); font-weight: 700;}
.callout__body{margin-top: 8px; color: var(--muted);}

.tableWrap{overflow:auto; border-radius: 16px; border: 1px solid var(--stroke); background: var(--card); box-shadow: var(--shadow);}
.table{width:100%; border-collapse: collapse; min-width: 760px;}
.table th, .table td{padding: 10px 12px; border-bottom: 1px solid var(--stroke); text-align:left; font-size: .95rem;}
.table th{font-family: var(--display); font-weight: 700;}
.table td{color: var(--muted);}
.table tbody tr:hover td{color: var(--text);}
.table thead tr:first-child th{background: rgba(255,255,255,.03);}

.miniKpis{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 12px;
}
.miniKpi{
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,.03);
  border-radius: 14px;
  padding: 10px 12px;
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.miniKpi__k{color: var(--muted); font-weight:600; font-size:.92rem;}
.miniKpi__v{font-family: var(--display); font-weight:700;}

.row{display:flex; gap: 16px; align-items: flex-start; justify-content: space-between; flex-wrap: wrap;}
.row__actions{display:flex; gap: 10px; align-items:center;}
.code{
  margin:0;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,.12);
  overflow:auto;
  font-family: var(--mono);
  font-size: .92rem;
  max-width: 820px;
}

.footer{
  margin-top: 50px;
  padding: 24px 0 36px;
  border-top: 1px solid var(--stroke);
}
.footer__inner{display:flex; align-items:flex-start; justify-content:space-between; gap: 16px; flex-wrap:wrap;}
.footer__title{font-family: var(--display); font-weight:700;}
.footer__links{display:flex; gap: 14px; color: var(--muted);}
.footer__links a{padding: 8px 10px; border-radius: 10px;}
.footer__links a:hover{background: var(--card); color: var(--text);}

.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}

.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.78);
  display:grid;
  place-items: center;
  padding: 22px;
  z-index: 50;
}
.lightbox__img{
  max-width: min(1100px, 96vw);
  max-height: 78vh;
  width: auto;
  height: auto;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(0,0,0,.2);
}
.lightbox__cap{
  margin-top: 12px;
  color: rgba(255,255,255,.85);
  max-width: min(1100px, 96vw);
  font-size: .95rem;
}
.lightbox__close{
  position: fixed;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: white;
  font-size: 26px;
  cursor: pointer;

  z-index: 9999;
  pointer-events: auto;
}

@media (max-width: 980px){
  .hero{grid-template-columns: 1fr; padding-top: 28px;}
  .kpis{grid-template-columns: 1fr;}
  .grid2{grid-template-columns: 1fr;}
  .section__head{flex-direction: column; align-items:flex-start;}
  .table{min-width: 680px;}
}

@media (max-width: 840px){
  .nav__links{display:none;}
  .nav__burger{display:flex;}
  .brand{min-width: 0;}
}

@media (prefers-reduced-motion: reduce){
  .reveal{transition:none;}
  .btn{transition:none;}
  .btn:hover{transform:none;}
}
/* Make the HTML `hidden` attribute actually hide elements (overrides author styles) */
[hidden] { display: none !important; }