:root {
  --bg: #f6efe7;
  --ink: #201b17;
  --muted: #6a5f57;
  --accent: #2b8a7f;
  --accent-dark: #1d5e57;
  --warm: #d96c4f;
  --paper: #fff8f1;
  --card: #ffffff;
  --shadow: 0 20px 50px rgba(27, 20, 16, 0.12);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Newsreader", serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
iframe {
  max-width: 100%;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(0px);
  opacity: 0.55;
}

.blob-1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(43, 138, 127, 0.4), transparent 70%);
  top: -160px;
  left: -120px;
}

.blob-2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(217, 108, 79, 0.35), transparent 70%);
  bottom: -180px;
  right: -120px;
}

.blob-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(236, 200, 128, 0.45), transparent 70%);
  top: 40%;
  right: 10%;
}

.hero {
  padding: 48px 6vw 40px;
  animation: rise 0.9s ease-out;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.logo {
  font-family: "Space Grotesk", sans-serif;
  font-size: 22px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: "Space Grotesk", sans-serif;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 40px;
  margin-top: 40px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--paper);
  font-family: "Space Grotesk", sans-serif;
  font-size: 13px;
  color: var(--accent-dark);
  margin-bottom: 16px;
}

h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.3rem, 3.2vw, 3.6rem);
  line-height: 1.08;
  margin-bottom: 16px;
}

.subtitle {
  font-size: 1.08rem;
  color: var(--muted);
  margin-bottom: 22px;
  max-width: 520px;
}

.authors {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.authors a {
  border-bottom: 1px solid rgba(43, 138, 127, 0.4);
}

.equal-note {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 22px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta {
  border: 1px solid rgba(32, 27, 23, 0.2);
  padding: 10px 18px;
  border-radius: 999px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  background: var(--paper);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(27, 20, 16, 0.12);
  border-color: rgba(43, 138, 127, 0.5);
}

.cta.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.cta.small {
  padding: 8px 16px;
  font-size: 0.9rem;
}

.hero-card {
  background: var(--card);
  border-radius: 26px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.card-label {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 18px;
}

.stat {
  margin-bottom: 18px;
}

.stat-value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
}

.stat-label {
  color: var(--muted);
  font-size: 0.95rem;
}

.mini-note {
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  padding: 0 6vw 60px;
}

.section {
  padding: 60px 0 10px;
}

.section-title {
  display: grid;
  gap: 10px;
  max-width: 640px;
  margin-bottom: 32px;
}

.section-title h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
}

.section-title p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 22px;
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3 {
  font-family: "Space Grotesk", sans-serif;
  margin-bottom: 10px;
}

.flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.flow-step {
  background: var(--paper);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(32, 27, 23, 0.08);
}

.flow-index {
  font-family: "Space Grotesk", sans-serif;
  color: var(--accent-dark);
  margin-bottom: 8px;
}

.diagram {
  display: grid;
  gap: 12px;
  max-width: 520px;
}

.diagram-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 14px;
  background: #fff;
  border: 1px dashed rgba(32, 27, 23, 0.2);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
}

.arrow {
  color: var(--warm);
}

.bibtex-card {
  background: var(--card);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
}

textarea {
  width: 100%;
  min-height: 180px;
  border-radius: 12px;
  border: 1px solid rgba(32, 27, 23, 0.2);
  padding: 14px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.9rem;
  resize: vertical;
  background: #fffdfa;
}

.toast {
  font-size: 0.9rem;
  color: var(--accent-dark);
  min-height: 18px;
}

.paper-card {
  background: var(--card);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.pdf-frame {
  width: 100%;
  height: 420px;
  border: 1px solid rgba(32, 27, 23, 0.15);
  border-radius: 12px;
  background: #fff;
}

.figure-card {
  display: grid;
  gap: 14px;
}

.figure-frame {
  width: 100%;
  height: 320px;
  border: 1px solid rgba(32, 27, 23, 0.15);
  border-radius: 12px;
  background: #fff;
}

.footer {
  padding: 30px 6vw 50px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.9rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    gap: 10px;
  }

  .cta {
    width: 100%;
    text-align: center;
  }
}