:root {
  --ink: #132238;
  --muted: #617087;
  --line: #dce5ef;
  --paper: #ffffff;
  --wash: #f4f8fc;
  --blue: #245b8f;
  --cyan: #16a6c8;
  --orange: #ed7040;
  --shadow: 0 20px 60px rgba(22, 47, 78, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 0%, rgba(22, 166, 200, 0.10), transparent 27rem),
    radial-gradient(circle at 86% 8%, rgba(237, 112, 64, 0.10), transparent 25rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
.shell { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.narrow { max-width: 840px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 229, 239, 0.82);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
}
.nav { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { color: var(--blue); font-weight: 800; text-decoration: none; letter-spacing: -0.02em; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--muted); font-size: 0.92rem; font-weight: 650; text-decoration: none; }
.nav-links a:hover { color: var(--blue); }

.hero { padding: 88px 0 42px; text-align: center; }
.venue {
  display: inline-flex;
  padding: 7px 14px;
  border: 1px solid rgba(36, 91, 143, 0.20);
  border-radius: 999px;
  color: var(--blue);
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
h1 { margin: 18px 0 0; font-size: clamp(4.1rem, 10vw, 7.6rem); line-height: 0.95; letter-spacing: -0.07em; }
.subtitle { margin: 24px auto 20px; max-width: 900px; font-size: clamp(1.3rem, 2.6vw, 2.05rem); line-height: 1.25; font-weight: 650; letter-spacing: -0.025em; }
.authors { display: flex; flex-wrap: wrap; justify-content: center; gap: 7px 13px; margin: 23px 0 5px; font-size: 1.04rem; }
.authors span { color: #a1adbb; }
.affiliation { margin: 5px 0 25px; color: var(--muted); }
.affiliation a { text-decoration-color: #c5d1dd; text-underline-offset: 3px; }
.affiliation a:hover { color: var(--blue); }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 11px; }
.button {
  display: inline-flex;
  min-width: 112px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.90);
  font-weight: 750;
  text-decoration: none;
  box-shadow: 0 5px 18px rgba(28, 54, 85, 0.06);
}
.button:hover { transform: translateY(-1px); border-color: #b8c9da; }
.button.primary { color: white; border-color: var(--blue); background: var(--blue); }
.button-icon { width: 17px; height: 17px; flex: 0 0 auto; }
.arxiv-mark { color: #9aa5b2; font-family: Georgia, serif; font-size: 0.72rem; font-weight: 800; letter-spacing: -0.04em; }
.button.disabled { color: #8b98a8; border-color: #dde4eb; background: #f1f4f7; box-shadow: none; cursor: not-allowed; }
.button.disabled:hover { transform: none; border-color: #dde4eb; }

.figure-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: white; box-shadow: var(--shadow); }
.teaser { padding: 13px; }
.teaser img { width: 100%; border-radius: 11px; }
.caption { margin: 12px 10px 2px; color: var(--muted); text-align: center; font-size: 0.88rem; line-height: 1.5; }

.section { padding-top: 104px; }
.section h2 { margin: 0 0 20px; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.08; letter-spacing: -0.045em; }
.section p { font-size: 1.04rem; }
.eyebrow { margin: 0 0 9px !important; color: var(--cyan); font-size: 0.78rem !important; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.lead { margin: 0 0 28px; color: var(--muted); }
.method-figure { padding: 28px 20px 20px; }
.method-figure img { width: 100%; }

footer { margin-top: 104px; border-top: 1px solid var(--line); color: var(--muted); background: var(--wash); }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; padding: 25px 0; font-size: 0.87rem; }
.footer-inner a { color: var(--blue); }

@media (max-width: 760px) {
  .site-header { position: static; }
  .nav-links a:not(:last-child) { display: none; }
  .hero { padding-top: 58px; }
  h1 { font-size: clamp(3.4rem, 18vw, 5.2rem); }
  .section { padding-top: 76px; }
  .method-figure { padding: 18px 8px 12px; }
  .footer-inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button:hover { transform: none; }
}