:root {
  color-scheme: light;
  --bg: #f8faf8;
  --surface: #ffffff;
  --text: #1c211f;
  --muted: #65706b;
  --line: #dfe6e2;
  --accent: #246b5b;
  --accent-2: #5b6f9d;
  --soft: #edf3f1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.site-header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.mark {
  width: 28px;
  height: 28px;
  border: 2px solid var(--accent);
  border-radius: 7px;
  display: inline-block;
  position: relative;
  background: var(--surface);
}

.mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-left: 2px solid var(--accent-2);
  border-bottom: 2px solid var(--accent-2);
  transform: rotate(-45deg);
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 15px;
}

nav a {
  text-decoration: none;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 24px 64px;
}

.hero {
  min-height: 540px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
  align-items: center;
  gap: 44px;
  border-top: 1px solid var(--line);
}

.eyebrow,
.date {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.14;
  margin: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(42px, 7vw, 78px);
  font-weight: 760;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

.lede {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.signal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.signal-card svg {
  width: 100%;
  display: block;
}

.signal-card rect {
  fill: var(--soft);
  stroke: var(--line);
}

.signal-card path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 7;
  stroke-linecap: round;
}

.signal-card circle {
  fill: var(--accent-2);
}

.signal-card line {
  stroke: #b9c5bf;
  stroke-width: 3;
}

.section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.section.plain {
  border-top: 0;
  padding-top: 28px;
}

.note-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.note-grid article,
.long-note {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.note-grid p,
.long-note p,
.page p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  gap: 36px;
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
}

.checks li {
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.checks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

.page {
  max-width: 780px;
  border-top: 1px solid var(--line);
  padding-top: 56px;
}

.page h1 {
  font-size: 54px;
}

.page h2 {
  margin-top: 8px;
}

.long-note {
  margin: 24px 0;
}

footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .site-header,
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    min-height: auto;
    padding: 56px 0;
  }

  h1,
  .page h1 {
    font-size: 40px;
  }
}