:root {
  --blue-950: #073653;
  --blue-800: #07517d;
  --blue-600: #167db7;
  --green-600: #2dbb20;
  --green-700: #219217;
  --ink: #10212d;
  --muted: #5f6f7a;
  --line: #dce6ec;
  --surface: #ffffff;
  --soft: #f3f8fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(22, 125, 183, .13), transparent 32rem),
    radial-gradient(circle at 92% 12%, rgba(45, 187, 32, .11), transparent 28rem),
    var(--soft);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.site-header,
footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header { min-height: 88px; }

.brand img {
  display: block;
  width: min(220px, 54vw);
  height: auto;
}

.text-link,
footer a {
  color: var(--blue-800);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover,
footer a:hover { text-decoration: underline; }

main {
  width: min(960px, calc(100% - 32px));
  margin: 34px auto 64px;
}

.download-card,
.instructions {
  border: 1px solid rgba(7, 81, 125, .12);
  border-radius: 28px;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 24px 70px rgba(7, 54, 83, .12);
}

.download-card {
  position: relative;
  padding: 52px;
  text-align: center;
  overflow: hidden;
}

.download-card::after {
  content: "";
  position: absolute;
  width: 230px;
  height: 230px;
  right: -100px;
  bottom: -110px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(22, 125, 183, .14), rgba(45, 187, 32, .18));
}

.app-icon-wrap {
  width: 112px;
  height: 112px;
  padding: 8px;
  margin: -92px auto 28px;
  border-radius: 28px;
  background: white;
  box-shadow: 0 18px 45px rgba(7, 54, 83, .2);
}

.app-icon { width: 100%; height: 100%; border-radius: 20px; display: block; }

.eyebrow {
  margin: 0 0 10px;
  color: var(--green-700);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1, h2 { color: var(--blue-950); letter-spacing: -.035em; }
h1 { margin: 0; font-size: clamp(2.1rem, 6vw, 4rem); line-height: 1.02; }
h2 { margin: 0 0 24px; font-size: clamp(1.7rem, 4vw, 2.6rem); }

.intro {
  width: min(620px, 100%);
  margin: 18px auto 30px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.release-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0 0 28px;
}

.release-grid div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #f9fcfd;
}

.release-grid dt { color: var(--muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.release-grid dd { margin: 6px 0 0; color: var(--blue-950); font-weight: 900; }

.download-button {
  position: relative;
  z-index: 1;
  display: inline-flex;
  justify-content: center;
  min-width: min(100%, 330px);
  padding: 17px 24px;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--green-600), var(--green-700));
  box-shadow: 0 14px 32px rgba(45, 187, 32, .25);
  font-size: 1rem;
  font-weight: 900;
  text-decoration: none;
}

.download-button:hover { transform: translateY(-1px); filter: brightness(.97); }
.download-button:focus-visible,
button:focus-visible,
a:focus-visible { outline: 3px solid rgba(22, 125, 183, .35); outline-offset: 3px; }

.distribution-note { margin: 14px 0 28px; color: var(--muted); font-size: .88rem; }

.checksum {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--blue-950);
  color: white;
  text-align: left;
}

.checksum div { min-width: 0; flex: 1; }
.checksum span { display: block; margin-bottom: 7px; color: #a9cfdf; font-size: .76rem; font-weight: 800; text-transform: uppercase; }
.checksum code { display: block; overflow-wrap: anywhere; font-size: .77rem; line-height: 1.55; }
.checksum button { border: 1px solid rgba(255, 255, 255, .25); border-radius: 10px; padding: 10px 14px; color: white; background: transparent; cursor: pointer; font-weight: 800; }
.checksum button:hover { background: rgba(255, 255, 255, .1); }

.release-error { color: #9d271d; font-weight: 700; }

.instructions { margin-top: 28px; padding: 44px 52px; }
.instructions ol { margin: 0; padding-left: 24px; }
.instructions li { padding-left: 8px; margin: 0 0 14px; color: #334b59; line-height: 1.6; }
.instructions li::marker { color: var(--green-700); font-weight: 900; }
.instructions aside { margin-top: 28px; padding: 18px 20px; border-left: 4px solid var(--blue-600); border-radius: 12px; background: #edf7fb; }
.instructions aside p { margin: 7px 0 0; color: var(--muted); line-height: 1.6; }

footer {
  min-height: 96px;
  border-top: 1px solid rgba(7, 81, 125, .12);
  color: var(--muted);
  font-size: .9rem;
}

footer nav { display: flex; gap: 22px; flex-wrap: wrap; }

@media (max-width: 680px) {
  .site-header { min-height: 74px; }
  main { margin-top: 48px; }
  .download-card, .instructions { border-radius: 22px; }
  .download-card { padding: 40px 22px 28px; }
  .app-icon-wrap { width: 92px; height: 92px; margin-top: -78px; border-radius: 23px; }
  .release-grid { grid-template-columns: 1fr; }
  .checksum { align-items: stretch; flex-direction: column; }
  .checksum button { align-self: flex-start; }
  .instructions { padding: 32px 24px; }
  footer { padding: 26px 0; align-items: flex-start; flex-direction: column; }
}