:root {
  color-scheme: light;
  --ink: #101418;
  --muted: #5b6670;
  --line: #d7dde2;
  --paper: #f7f8f6;
  --panel: #ffffff;
  --blue: #1f6feb;
  --cyan: #00a6b8;
  --green: #4d9f54;
  --charcoal: #17212b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

.skip-link {
  position: fixed;
  z-index: 40;
  top: 12px;
  left: 12px;
  transform: translateY(-140%);
  padding: 10px 14px;
  color: #081018;
  background: #fff;
  border-radius: 6px;
  font-weight: 800;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: #fff;
  background: rgba(12, 17, 22, 0.38);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(18px);
}

.brand,
.nav,
.hero-actions,
.footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #0d141c;
  background: #fff;
  border-radius: 50%;
  font-weight: 900;
}

.nav {
  gap: clamp(14px, 3vw, 34px);
  font-size: 0.95rem;
}

.nav a,
.header-action {
  opacity: 0.86;
}

.nav a:hover,
.header-action:hover {
  opacity: 1;
}

.header-action {
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
}

.hero {
  position: relative;
  min-height: 94svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(6, 11, 16, 0.92), rgba(6, 11, 16, 0.64) 42%, rgba(6, 11, 16, 0.1)),
    linear-gradient(0deg, rgba(6, 11, 16, 0.78), rgba(6, 11, 16, 0.05) 46%);
}

.hero-content {
  position: relative;
  width: min(850px, 100%);
  padding: 150px clamp(20px, 5vw, 72px) 74px;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  color: #8de8ef;
}

.eyebrow.dark {
  color: var(--cyan);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: 6.3rem;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: 4.25rem;
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-copy {
  max-width: 640px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.18rem;
}

.hero-actions {
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
}

.button.primary {
  color: #081018;
  background: #fff;
}

.button.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.44);
  background: rgba(255, 255, 255, 0.08);
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-block: 1px solid var(--line);
  background: #fff;
}

.metric-band div {
  min-height: 132px;
  padding: 28px clamp(18px, 4vw, 46px);
  border-right: 1px solid var(--line);
}

.metric-band div:last-child {
  border-right: 0;
}

.metric-band strong,
.metric-band span {
  display: block;
}

.metric-band strong {
  margin-bottom: 8px;
  font-size: 1.9rem;
}

.metric-band span {
  color: var(--muted);
}

.section {
  padding: clamp(70px, 11vw, 132px) clamp(20px, 5vw, 72px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: start;
}

.split > div:first-child p:last-child {
  max-width: 560px;
  font-size: 1.05rem;
}

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

.feature-card,
.use-list article,
.compare-panel,
.note-panel,
details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-card {
  min-height: 216px;
  padding: 24px;
}

.icon {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.intro-grid,
.process-list,
.source-links {
  display: grid;
  gap: 14px;
}

.intro-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.intro-grid article {
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.process {
  background: #fff;
}

.process-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-list li {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf8;
}

.process-list span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
}

.use-section {
  background: #edf2f0;
}

.use-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.use-list article {
  padding: 28px;
}

.compare {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr;
  gap: 14px;
  background: var(--charcoal);
}

.sources {
  background: #f4f0e8;
}

.source-links {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.source-links a {
  min-height: 92px;
  display: flex;
  align-items: center;
  padding: 24px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #d8d0c4;
  border-radius: 8px;
  font-weight: 850;
}

.source-links a:hover {
  border-color: var(--cyan);
}

.compare-panel,
.note-panel {
  padding: clamp(28px, 5vw, 54px);
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
}

.compare h2,
.compare h3 {
  color: #fff;
}

.compare p {
  color: rgba(255, 255, 255, 0.74);
}

.faq {
  max-width: 1040px;
  margin: 0 auto;
}

details {
  margin-bottom: 12px;
  padding: 22px 24px;
}

summary {
  cursor: pointer;
  font-weight: 850;
}

details p {
  margin: 14px 0 0;
}

.footer {
  justify-content: space-between;
  gap: 20px;
  padding: 30px clamp(20px, 5vw, 72px);
  color: #fff;
  background: #0e141b;
}

@media (max-width: 860px) {
  .site-header {
    padding: 14px 18px;
  }

  .nav {
    display: none;
  }

  .header-action {
    padding: 9px 13px;
  }

  .hero {
    min-height: 90svh;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(6, 11, 16, 0.94), rgba(6, 11, 16, 0.48)),
      linear-gradient(0deg, rgba(6, 11, 16, 0.78), rgba(6, 11, 16, 0.1));
  }

  h1 {
    font-size: 4.3rem;
  }

  h2 {
    font-size: 2.75rem;
  }

  .hero-copy {
    font-size: 1.06rem;
  }

  .metric-band strong {
    font-size: 1.5rem;
  }

  .metric-band,
  .split,
  .feature-grid,
  .intro-grid,
  .process-list,
  .use-list,
  .source-links,
  .compare {
    grid-template-columns: 1fr;
  }

  .metric-band div {
    min-height: 108px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-band div:last-child {
    border-bottom: 0;
  }

  .feature-card {
    min-height: auto;
  }
}

@media (max-width: 460px) {
  .brand span:last-child {
    display: none;
  }

  h1 {
    font-size: 3.1rem;
  }

  h2 {
    font-size: 2.2rem;
  }

  .button {
    width: 100%;
  }

  .hero-content {
    padding-bottom: 44px;
  }
}