body {
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 6%, rgba(191, 233, 220, .48), transparent 23rem),
    radial-gradient(circle at 92% 14%, rgba(217, 239, 145, .42), transparent 18rem),
    var(--paper);
}

.hero {
  isolation: isolate;
  background:
    radial-gradient(circle at 18% 24%, rgba(217, 239, 145, .24), transparent 18rem),
    radial-gradient(circle at 92% 28%, rgba(191, 233, 220, .22), transparent 24rem),
    linear-gradient(135deg, #08282f 0%, #123c45 48%, #205b61 100%);
}

.hero:before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}

.site-header {
  backdrop-filter: blur(14px);
}

.nav-wrap {
  border-bottom-color: rgba(255, 255, 255, .14);
}

.hero h1,
.section h2,
.summary h2 {
  font-family: inherit;
  font-weight: 850;
  letter-spacing: -.055em;
}

.hero h1 em {
  background: linear-gradient(90deg, var(--mint), var(--lime));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.button.primary {
  background: linear-gradient(135deg, var(--lime), var(--coral));
  color: #08282f;
}

.vision-card {
  position: relative;
  background:
    radial-gradient(circle at 50% 42%, rgba(255, 255, 255, .72), transparent 7.5rem),
    linear-gradient(145deg, #eefbf4, #8cd5c3);
  box-shadow:
    inset 0 0 90px rgba(255, 255, 255, .45),
    0 42px 90px rgba(0, 0, 0, .22);
}

.vision-card:before,
.vision-card:after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(18, 60, 69, .14);
}

.vision-card:before {
  inset: 42px;
}

.vision-card:after {
  inset: 78px;
}

.section {
  position: relative;
}

.intro .split,
.faq-grid,
.sources-grid {
  position: relative;
}

.sign-grid article,
.option-grid article,
.guide-card,
.source-list a {
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.sign-grid article:hover,
.option-grid article:hover,
.guide-card:hover,
.source-list a:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 70px rgba(14, 55, 62, .12);
}

.guides {
  background:
    linear-gradient(180deg, var(--paper), #eef7f2);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.guide-card {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  color: var(--ink);
  background: rgba(255, 253, 250, .78);
  border: 1px solid rgba(18, 60, 69, .08);
  border-radius: var(--radius);
  box-shadow: 0 10px 40px rgba(14, 55, 62, .06);
}

.guide-card span {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: auto;
  color: var(--ink);
  background: var(--lime);
  border-radius: 50%;
  font-weight: 800;
}

.guide-card h3 {
  margin: 38px 0 10px;
  font-size: 24px;
  line-height: 1.2;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
}

.sources {
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 18%, rgba(217, 239, 145, .38), transparent 22rem),
    var(--cream);
}

.sources-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 8vw;
  align-items: center;
}

.sources-grid h2 {
  color: var(--ink);
  font-size: clamp(38px, 4.5vw, 59px);
  line-height: 1.08;
  margin: 0 0 20px;
}

.sources-grid p {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
}

.source-list {
  display: grid;
  gap: 14px;
}

.source-list a {
  position: relative;
  display: block;
  padding: 22px 58px 22px 24px;
  color: var(--ink);
  background: rgba(255, 253, 250, .76);
  border: 1px solid rgba(18, 60, 69, .08);
  border-radius: 18px;
  font-weight: 750;
}

.source-list a:before {
  content: "↗";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  color: #398273;
}

.footer-bottom a {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-header nav {
  gap: 20px;
  font-size: 14px;
}

@media (max-width: 850px) {
  .guide-grid,
  .sources-grid {
    grid-template-columns: 1fr;
  }

  .guide-card {
    min-height: 220px;
  }
}

@media (max-width: 520px) {
  .guide-grid {
    gap: 14px;
  }

  .guide-card {
    padding: 24px;
  }
}