:root {
  --ink: #17211b;
  --muted: #5f6963;
  --paper: #fbfaf5;
  --paper-deep: #f0efe6;
  --line: #d8d5c8;
  --accent: #0f766e;
  --accent-dark: #0a4f49;
  --clay: #b45f3c;
  --gold: #d8a62d;
  --shadow: 0 24px 70px rgba(23, 33, 27, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Source Sans 3", sans-serif;
  font-size: 18px;
  line-height: 1.65;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), transparent 34%),
    linear-gradient(315deg, rgba(180, 95, 60, 0.12), transparent 30%),
    var(--paper);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(216, 213, 200, 0.75);
  background: rgba(251, 250, 245, 0.88);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
}

.brand {
  font-family: "Crimson Pro", serif;
  font-size: 28px;
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent-dark);
}

.hero {
  min-height: 76vh;
  display: grid;
  align-items: center;
  padding: 72px 24px 56px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 18% 24%, rgba(216, 166, 45, 0.2), transparent 26%),
    linear-gradient(120deg, rgba(15, 118, 110, 0.16), rgba(251, 250, 245, 0) 55%);
}

.hero-inner {
  width: min(100%, 1040px);
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--clay);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-family: "Crimson Pro", serif;
  line-height: 1.05;
}

h1 {
  max-width: 980px;
  margin: 0 auto;
  font-size: clamp(46px, 8vw, 92px);
}

h2 {
  font-size: clamp(34px, 5vw, 54px);
}

.authors {
  max-width: 900px;
  margin: 30px auto 8px;
  font-size: 21px;
  font-weight: 600;
}

.authors a {
  text-decoration-color: rgba(15, 118, 110, 0.35);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.authors a:hover {
  color: var(--accent-dark);
}

.affiliations {
  max-width: 900px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 16px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(23, 33, 27, 0.06);
}

.button:hover {
  border-color: rgba(15, 118, 110, 0.55);
  transform: translateY(-1px);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 84px 24px;
}

.section-heading {
  margin-bottom: 26px;
}

.abstract-text {
  max-width: 920px;
  margin: 0;
  color: #26322b;
  font-size: 17px;
  line-height: 1.75;
  text-align: justify;
  text-justify: inter-word;
}

.figure-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.figure-card {
  width: 86%;
  margin: 0 auto;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.figure-main {
  width: 86%;
}

.figure-card img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--paper-deep);
}

.figure-pdf {
  display: block;
  width: 100%;
  border: 0;
  background: white;
  clip-path: inset(1px);
}

.figure-main .figure-pdf {
  aspect-ratio: 783 / 390;
}

.figure-results .figure-pdf {
  aspect-ratio: 473 / 359;
}

.figure-ablation .figure-pdf {
  aspect-ratio: 438 / 196;
}

.figure-card figcaption {
  padding: 18px 20px 22px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.figure-card strong {
  color: var(--ink);
}

.citation {
  overflow-x: auto;
  margin: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #17211b;
  color: #f8f6ed;
  font-size: 15px;
  line-height: 1.55;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px 36px;
  color: var(--muted);
  text-align: center;
  font-size: 15px;
}

.footer p {
  margin: 0;
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 14px 18px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
  }

  .hero {
    min-height: auto;
    padding: 58px 18px 42px;
  }

  .authors {
    font-size: 18px;
  }

  .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .section {
    padding: 62px 18px;
  }

  .figure-grid {
    grid-template-columns: 1fr;
  }

  .figure-card,
  .figure-main {
    width: 100%;
  }
}