:root {
  --bg: #0b1220;
  --panel: #111a2d;
  --panel-2: #17223a;
  --line: #2e3c58;
  --ink: #f5f7fb;
  --muted: #aab5c8;
  --yellow: #ffbf17;
  --green: #26c864;
  --blue: #3b82f6;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at top left, #1b2c4d 0, var(--bg) 36%);
}

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

.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 22px 54px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 24px;
  align-items: stretch;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 26, 45, 0.9);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--yellow);
  font-weight: 800;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 760px;
  font-size: 42px;
  line-height: 1.12;
}

.lead {
  max-width: 780px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.actions a,
.download {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 16px;
  font-weight: 800;
  background: var(--panel-2);
}

.actions .primary,
.download {
  color: #08111f;
  border-color: var(--yellow);
  background: var(--yellow);
}

.hero-card,
.downloads article,
.manuals details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(17, 26, 45, 0.92);
}

.hero-card {
  display: grid;
  gap: 10px;
  padding: 20px;
}

.hero-card strong {
  color: var(--yellow);
  font-size: 18px;
}

.hero-card span {
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0;
}

.steps div {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 14px;
  background: var(--panel);
}

.steps b {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  color: #08111f;
  background: var(--yellow);
}

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

.downloads article {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.downloads p,
.section-title p,
details li {
  color: var(--muted);
  line-height: 1.65;
}

.tag {
  justify-self: start;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 800;
}

.ready {
  color: #04130a;
  background: var(--green);
}

.prep {
  color: #08111f;
  background: #c7d2fe;
}

.download.disabled {
  color: var(--muted);
  border-color: var(--line);
  background: var(--panel-2);
  pointer-events: none;
}

.checksum {
  color: var(--muted);
  font-size: 12px;
}

.manuals {
  margin-top: 22px;
}

.section-title {
  margin-bottom: 12px;
}

.manuals details {
  margin-bottom: 10px;
  padding: 14px 16px;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

@media (max-width: 860px) {
  .hero,
  .downloads,
  .steps {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 31px;
  }
}