:root {
  color-scheme: light;
  --paper: #f5f8fd;
  --surface: #ffffff;
  --ink: #172232;
  --muted: #66758a;
  --line: #d8e2f0;
  --blue: #2b68d8;
  --blue-dark: #184aa6;
  --blue-soft: #dce9ff;
  --mint: #dff4e9;
  font-family: "Avenir Next", Avenir, "PingFang SC", "Hiragino Sans GB", sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(43, 104, 216, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(rgba(43, 104, 216, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--paper);
}

a {
  color: inherit;
}

.site-header,
main,
footer {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.wordmark-dot {
  width: 13px;
  height: 13px;
  border: 4px solid var(--blue);
  border-radius: 50%;
  box-shadow: 8px 8px 0 -3px var(--mint);
}

.text-link,
footer a {
  color: var(--muted);
  font-size: 14px;
  text-underline-offset: 4px;
}

.text-link:hover,
footer a:hover {
  color: var(--blue-dark);
}

.hero {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(480px, 1.3fr);
  align-items: center;
  min-height: 690px;
  padding: 72px 0 80px;
}

.flow-thread {
  position: relative;
  width: min(340px, 85%);
  height: 440px;
  margin-inline: auto;
}

.thread-line {
  position: absolute;
  inset: 15px 48% 15px auto;
  width: 56px;
  border: 2px solid var(--blue);
  border-block: 0;
  border-radius: 48% 52% 43% 57%;
  transform: rotate(5deg) skewY(-8deg);
  background: linear-gradient(180deg, var(--blue-soft), rgba(220, 233, 255, 0.15));
}

.thread-node {
  position: absolute;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 80px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 16px 16px 16px 5px;
  background: var(--surface);
  box-shadow: 0 16px 38px rgba(35, 72, 123, 0.12);
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
}

.node-one {
  top: 50px;
  left: 32px;
}

.node-two {
  top: 190px;
  right: 10px;
  border-radius: 16px 16px 5px;
  background: var(--blue);
  color: #fff;
}

.node-three {
  bottom: 48px;
  left: 58px;
}

.hero-copy {
  min-width: 0;
  padding-left: clamp(20px, 6vw, 88px);
}

.eyebrow,
.section-label {
  margin: 0 0 18px;
  color: var(--blue-dark);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 690px;
  margin: 0;
  font-size: clamp(54px, 7vw, 92px);
  font-weight: 650;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

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

.lede {
  max-width: 620px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
}

.actions {
  display: flex;
  min-width: 0;
  align-items: stretch;
  gap: 12px;
  margin-top: 38px;
}

.download-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 62px;
  border-radius: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.download-button {
  flex-direction: column;
  align-items: flex-start;
  min-width: 245px;
  padding: 13px 22px;
  background: var(--blue);
  box-shadow: 0 14px 30px rgba(43, 104, 216, 0.22);
  color: #fff;
}

.download-button small {
  margin-top: 3px;
  font-size: 11px;
  font-weight: 500;
  opacity: 0.76;
}

.secondary-button {
  padding: 0 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
}

.download-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.download-button:hover {
  background: var(--blue-dark);
  box-shadow: 0 18px 34px rgba(43, 104, 216, 0.27);
}

.download-button:focus-visible,
.secondary-button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--blue-soft);
  outline-offset: 4px;
}

.checksum {
  display: grid;
  min-width: 0;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  line-height: 1.6;
}

.checksum span {
  color: var(--blue-dark);
  font-weight: 700;
}

.checksum code {
  overflow-wrap: anywhere;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
}

.feature-strip p {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 30px;
}

.feature-strip p + p {
  border-left: 1px solid var(--line);
}

.feature-strip strong {
  color: var(--blue-dark);
  font-size: 16px;
}

.feature-strip span {
  color: var(--muted);
  font-size: 14px;
}

.compatibility,
.notice {
  display: grid;
  grid-template-columns: 1fr 1.2fr auto;
  gap: 44px;
  align-items: center;
  margin-top: 70px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
}

.compatibility h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.compatibility p,
.notice p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.compatibility .section-label,
.notice .section-label {
  margin-bottom: 9px;
}

.compatibility a {
  white-space: nowrap;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  text-underline-offset: 4px;
}

.notice {
  grid-template-columns: 140px 1fr;
  margin-top: 18px;
  background: var(--mint);
}

footer {
  display: flex;
  justify-content: space-between;
  margin-top: 76px;
  padding: 26px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 46px;
  }

  .flow-thread {
    width: 250px;
    height: 245px;
  }

  .thread-line {
    inset-block: 8px;
  }

  .node-one {
    top: 14px;
  }

  .node-two {
    top: 100px;
  }

  .node-three {
    bottom: 8px;
  }

  .hero-copy {
    padding-left: 0;
  }

  .compatibility {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

@media (max-width: 580px) {
  .site-header,
  main,
  footer {
    width: calc(100% - 28px);
  }

  .site-header {
    min-height: 68px;
  }

  .hero {
    padding-bottom: 58px;
  }

  h1 {
    font-size: 52px;
  }

  .actions {
    flex-direction: column;
  }

  .download-button,
  .secondary-button {
    width: 100%;
    max-width: 100%;
  }

  .checksum {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .feature-strip {
    grid-template-columns: 1fr;
  }

  .feature-strip p {
    padding: 22px 4px;
  }

  .feature-strip p + p {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .compatibility,
  .notice {
    padding: 26px 22px;
  }

  .notice {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  footer {
    flex-direction: column;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}