:root {
  --bg: #f6f7f3;
  --ink: #10212d;
  --muted: #4f5d68;
  --accent: #0f5c57;
  --accent-2: #cc6d2f;
  --panel: #ffffff;
  --line: #d9dfdf;
  --shadow: 0 12px 40px rgba(16, 33, 45, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Sora", sans-serif;
  background: radial-gradient(circle at 10% -20%, #e6f2ef 0%, transparent 40%),
    radial-gradient(circle at 90% 120%, #ffe7d8 0%, transparent 40%),
    var(--bg);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(70px);
  opacity: 0.25;
  z-index: -1;
}

.orb-a {
  width: 320px;
  height: 320px;
  background: #1f8f87;
  top: -100px;
  right: -80px;
}

.orb-b {
  width: 260px;
  height: 260px;
  background: #e88e53;
  bottom: -80px;
  left: -60px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 14px 28px;
  backdrop-filter: blur(12px);
  background: rgba(246, 247, 243, 0.8);
  border-bottom: 1px solid rgba(15, 92, 87, 0.12);
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
}

.topbar-actions .btn {
  padding: 6px 16px;
  font-size: 0.88rem;
  line-height: 1.2;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

nav {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

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

main {
  width: min(1120px, 92vw);
  margin: 32px auto 80px;
}

.hero {
  text-align: center;
  padding: 42px 18px 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  color: var(--accent);
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  margin-top: 14px;
  font-family: "Source Serif 4", serif;
  font-size: clamp(2rem, 4.8vw, 4rem);
  font-weight: 600;
}

h1 span {
  color: var(--accent);
}

.lead {
  max-width: 840px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.institutions-logos {
  margin-top: 14px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.institution-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
  min-height: 58px;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.institution-logo:hover {
  transform: translateY(-1px);
  border-color: #9db7b3;
  box-shadow: 0 10px 22px rgba(16, 33, 45, 0.14);
}

.institution-logo:active {
  transform: translateY(0);
  box-shadow: 0 6px 14px rgba(16, 33, 45, 0.1);
}

.institution-logo:focus-visible {
  outline: 2px solid #6a9f99;
  outline-offset: 2px;
}

.institutions-logos img {
  display: block;
  max-height: 36px;
  width: auto;
  max-width: 160px;
}

.actions {
  margin-top: 26px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(15, 92, 87, 0.2);
}

.btn.ghost {
  background: transparent;
  color: var(--accent);
}

.btn.disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn.disabled small {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px dashed #afbbb9;
  border-radius: 999px;
  padding: 2px 7px;
  background: #f8fbfb;
}

.metrics {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metrics article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.metrics h3 {
  font-size: 1.25rem;
  color: var(--accent-2);
}

.metrics p {
  margin: 4px 0 0;
  font-size: 0.86rem;
  color: var(--muted);
}

.panel,
.split,
.cta {
  margin-top: 58px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.panel h2,
.split h2,
.cta h2 {
  font-family: "Source Serif 4", serif;
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
}

.cards {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.cards article,
.bench-grid article {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  background: linear-gradient(145deg, #ffffff, #f9fbfa);
}

.code-stack {
  background: #0f1720;
  color: #d6e1ea;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.code-stack pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.55;
}

.code-stack code {
  font-family: inherit;
}

.cards p,
.bench-grid p,
.split p,
.cta p,
.sub {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: stretch;
}

.split ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.loop-visual {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.loop-visual div {
  border: 1px dashed #9bb8b5;
  border-radius: 12px;
  min-height: 88px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--accent);
  background: linear-gradient(160deg, #f2fbf8, #f8fbff);
}

.bench-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.file-card {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(145deg, #ffffff, #f9fbfa);
  padding: 18px;
}

.figure-preview {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.figure-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.faq-intro {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.15rem;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item .faq-answer {
  padding: 0 20px 18px;
  color: var(--muted);
}

.faq-contact {
  margin-top: 26px;
  background: linear-gradient(145deg, #eff7f6, #f9fbff);
}

.faq-contact .actions {
  margin-top: 16px;
}

.file-name {
  margin: 0;
  font-weight: 700;
  color: var(--accent);
}

.file-note {
  margin: 6px 0 14px;
  font-size: 0.92rem;
  color: var(--muted);
}

.cta {
  text-align: center;
}

footer {
  width: min(1120px, 92vw);
  margin: 0 auto 34px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

footer a {
  color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .topbar {
    grid-template-columns: 1fr auto;
    gap: 12px 18px;
    padding: 12px 20px;
  }

  nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    gap: 14px;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cards,
  .bench-grid {
    grid-template-columns: 1fr;
  }

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

}

@media (max-width: 720px) {
  .topbar {
    gap: 10px 12px;
    padding: 10px 16px;
  }

  .topbar-actions {
    justify-self: end;
    gap: 8px;
  }

  .topbar-actions .btn {
    padding: 5px 12px;
    font-size: 0.82rem;
  }

  nav {
    gap: 10px;
  }

  nav a {
    font-size: 0.84rem;
  }

  main {
    margin-top: 18px;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
  }

}

@media (max-width: 480px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .brand,
  .topbar-actions,
  nav {
    justify-self: start;
  }

  .topbar-actions {
    grid-row: 2;
  }

  nav {
    grid-row: 3;
  }
}