:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1d2732;
  background: #f6f8fa;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
body { margin: 0; }
.page { width: min(1100px, calc(100% - 48px)); margin: 0 auto; }

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid #dce3e9;
}
.brand { color: #192431; font-size: 1.05rem; font-weight: 750; letter-spacing: -.025em; text-decoration: none; }
.preview-label { color: #687788; font-size: .82rem; }

.intro { padding: 48px 0 44px; }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 1000px;
  margin-bottom: 24px;
  font-size: clamp(2.3rem, 4.1vw, 3.25rem);
  font-weight: 720;
  line-height: 1.12;
  letter-spacing: -.046em;
}
.authors { max-width: 970px; margin-bottom: 8px; color: #293645; font-size: clamp(1rem, 1.8vw, 1.25rem); line-height: 1.6; }
.affiliation { margin-bottom: 25px; color: #657383; font-size: .98rem; line-height: 1.55; }
.intro-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.intro-links a, .intro-links span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 14px;
  border: 1px solid #bdc8d2;
  border-radius: 999px;
  color: #38495b;
  background: #fff;
  font-size: .84rem;
  text-decoration: none;
}
.intro-links a { gap: 8px; border-color: #8899a8; color: #1d2732; }
.intro-links a:hover, .intro-links a:focus-visible { border-color: #a96d3c; color: #8d5a30; }
.intro-links span { color: #718091; background: transparent; }

.listening { padding: 0 0 92px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 22px; margin-bottom: 19px; }
.eyebrow { margin-bottom: 7px; color: #a46836; font-size: .73rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
h2 { margin-bottom: 0; font-size: 1.8rem; line-height: 1.2; letter-spacing: -.035em; }
.section-heading > p { margin: 0 0 2px; color: #6a7888; font-size: .88rem; }

.sample-card {
  overflow: hidden;
  border: 1px solid #e2e8ee;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 8px 26px rgba(28, 49, 71, .045);
}
.sample { padding: 31px 35px; }
.sample + .sample { border-top: 1px solid #e5ebef; }
.sample-heading { display: flex; justify-content: space-between; align-items: start; gap: 14px; }
h3 { margin-bottom: 4px; font-size: 1.15rem; line-height: 1.3; font-weight: 680; letter-spacing: -.015em; }
.sample-detail { margin-bottom: 0; color: #718092; font-size: .84rem; }
.sample audio { display: block; width: 100%; height: 54px; margin-top: 22px; accent-color: #a96d3c; }
.source-note { margin: 13px 2px 0; color: #82909d; font-size: .78rem; line-height: 1.5; }
.source-note a { color: inherit; text-underline-offset: 2px; }
.source-note code { font-size: .94em; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 25px 0 35px;
  border-top: 1px solid #dce3e9;
  color: #8a97a4;
  font-size: .79rem;
}

@media (max-width: 640px) {
  .page { width: min(100% - 30px, 1100px); }
  .masthead { padding: 22px 0; }
  .intro { padding: 42px 0 36px; }
  h1 { font-size: clamp(2.1rem, 9.2vw, 3.1rem); }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 8px; }
  .sample { padding: 25px 18px; }
  footer { flex-direction: column; gap: 6px; }
}