:root{
  --bg: #0b0c10;
  --panel: #111319;
  --text: #e7eaf0;
  --muted: #a8b0bf;
  --brand: #5aa9e6;
  --brand-2: #7dd3fc;
  --border: #222836;
  --accent: #8b5cf6;
  --success: #22c55e;
  --danger: #ef4444;
  --shadow: 0 4px 20px rgba(0,0,0,.25);
}

html.light{
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #0b1324;
  --muted: #52607a;
  --brand: #0d6efd;
  --brand-2: #44bdf7;
  --border: #e6e9f2;
  --accent: #7048e8;
  --success: #16a34a;
  --danger: #dc2626;
  --shadow: 0 4px 20px rgba(10, 15, 30, .08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container{max-width:1100px;margin:0 auto;padding:0 20px}
.section{padding:48px 0}
.hero{padding:64px 0}
h1,h2,h3{line-height:1.2;margin:0 0 12px}
h1{font-size: clamp(28px, 4vw, 40px)}
h2{font-size: clamp(22px, 3vw, 28px)}
p{margin:0 0 14px;color:var(--text)}
.lede{font-size:1.125rem;color:var(--muted);max-width:900px}
.lede-full{max-width:none} /* make homepage lede same width as figures */
.display-full{max-width:none; display:block;} /* make homepage title same width as figures */

.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(0,0,0,.2);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--border);
}
html.light .site-header{background:rgba(255,255,255,.7)}

.nav-wrap{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo{width:28px;height:28px}
.brand-text{font-weight:700;white-space:nowrap}

.nav{display:flex;gap:10px;margin-left:auto;margin-right:8px}
.nav-link{
  text-decoration:none;padding:8px 12px;border-radius:8px;color:var(--text);
}
.nav-link:hover{background:var(--panel);color:var(--brand);box-shadow:var(--shadow)}
.nav-link.active{color:#fff;background:linear-gradient(90deg,var(--brand),var(--accent))}
html.light .nav-link.active{color:#fff}

.btn{
  border:1px solid var(--border);background:var(--panel);
  color:var(--text);padding:8px 12px;border-radius:10px;
  cursor:pointer
}
.btn:hover{border-color:transparent;box-shadow:var(--shadow)}
.btn.primary{background:linear-gradient(90deg,var(--brand),var(--accent));border-color:transparent}
.btn.ghost{background:transparent}

.cta-row{display:flex;gap:10px;margin-top:14px}

.section .container > h2{margin-top:8px}

.citation-card{
  margin-top:12px;padding:16px;border:1px solid var(--border);
  border-radius:12px;background:var(--panel)
}

.site-footer{padding:24px 0;border-top:1px solid var(--border);margin-top:40px}

.filters{
  display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;
  padding:12px;border:1px solid var(--border);border-radius:12px;background:var(--panel);
  margin-bottom:16px
}
.field{display:flex;flex-direction:column;gap:6px;min-width:170px}
.field.grow{flex:1}
.select,.input{
  padding:10px 12px;border:1px solid var(--border);border-radius:10px;
  background:transparent;color:var(--text)
}
.input::placeholder{color:var(--muted)}

.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:12px;background:var(--panel)}
.table{width:100%;border-collapse:separate;border-spacing:0}
.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--border);white-space:nowrap}
.table thead th{
  position:sticky;top:0;background:var(--panel);z-index:1;
  cursor:pointer;
}
.table tr:hover td{background-color:rgba(125,125,255,.06)}

.table-footer{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:12px;color:var(--muted)
}
.pager{display:flex;align-items:center;gap:10px}

.cards{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px
}
.card{
  border:1px solid var(--border);border-radius:12px;background:var(--panel);padding:14px
}
.card h3{font-size:1rem;margin-bottom:6px}
.card p{color:var(--muted);margin:0 0 10px}
.card .chip{display:inline-block;padding:4px 8px;border-radius:999px;border:1px solid var(--border);margin-right:6px}
.card .actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.card a.btn{display:inline-block;text-decoration:none}

@media (max-width:720px){
  .brand-text{display:none}
  .field{min-width:140px}
}

/* ===== Sortable header arrows (for Explore table) ===== */
.table thead th.th-sortable { user-select: none; }
.table thead th .sort-ind {
  display: inline-block;
  margin-left: 0.35rem;
  opacity: 0.75;
  font-size: 0.9em;
  line-height: 1;
}
.table thead th[aria-sort="ascending"] .sort-ind,
.table thead th[aria-sort="descending"] .sort-ind { opacity: 1; }
.table thead th:focus {
  outline: 2px dashed currentColor;
  outline-offset: 2px;
}

/* ==== Premium look & micro-interactions ==== */

/* Glass effect helper */
.glass {
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
html.light .glass {
  background: linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.5));
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(90deg, var(--brand), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Hero split (single column) */
.hero-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}
.hero-copy .display {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.05;
  margin: 0 0 10px;
}
.btn-lg { padding: 12px 18px; font-size: 1rem; border-radius: 12px; }
.btn.outline { background: transparent; border: 1px solid var(--border); }
.hero-highlights { list-style: none; padding: 0; margin: 14px 0 0; color: var(--muted); }
.hero-highlights .dot { display:inline-block; width:.55em; height:.55em; border-radius:50%; background: var(--brand); margin-right:.5em; }

/* Section headings */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.h2-tight { font-size: clamp(22px, 3.4vw, 30px); margin: 0 0 10px; }

/* Decorative background orbs */
.bg-orb {
  position: fixed;
  inset: auto auto 10% -8%;
  width: 44vw; height: 44vw; max-width: 720px; max-height: 720px;
  filter: blur(80px); opacity: .25; pointer-events: none; z-index: -1;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--brand), transparent 70%);
}
.bg-orb.orb-2 {
  inset: -10% -8% auto auto;
  background: radial-gradient(closest-side, var(--accent), transparent 70%);
}
html.light .bg-orb { opacity: .35; filter: blur(70px); }

/* Toast */
.toast {
  position: absolute;
  right: 12px; top: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  color: var(--text);
  box-shadow: var(--shadow);
  transform: translateY(-10px);
  opacity: 0; pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Minor polish */
.brand .logo { border-radius: 6px; }
.justify { text-align: justify; text-justify: inter-word; }

/* Responsive */
@media (max-width: 980px) {
  .hero-split { grid-template-columns: 1fr; }
}

/* ===== Concept figures (first image full + hover lift) ===== */
.figure-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.figure-grid .full {
  grid-column: 1 / -1; /* span all columns */
}
figure.concept {
  margin: 0;
  background: var(--panel);
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background-color .25s ease;
  will-change: transform;
}
figure.concept img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}
figure.concept figcaption {
  font-size: .9rem;
  line-height: 1.35;
  margin-top: .55rem;
  color: var(--muted);
  text-align: center;
}
/* Hover float (uniform for all figures) */
figure.concept.float:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

/* ===== Citation card (hover lift) ===== */
.float-card {
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background-color .25s ease;
  will-change: transform;
}
.float-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}