*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #f3f5f7;
  --bg-elevated: #ffffff;
  --fg: #1b242c;
  --muted: #5b6874;
  --accent: #1a6d82;
  --accent-hover: #145668;
  --accent-soft: #e5f2f6;
  --on-accent: #ffffff;
  --border: #e1e6eb;
  --shadow: 0 12px 32px rgba(27, 36, 44, 0.06);
  --radius: 16px;
  --max: 1080px;
  --space: clamp(16px, 3vw, 28px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101418;
    --bg-elevated: #1a2128;
    --fg: #e7eef3;
    --muted: #a7b4c0;
    --accent: #8ecfe0;
    --accent-hover: #b7e3ee;
    --accent-soft: #1c333b;
    --on-accent: #0d1c22;
    --border: #2c3640;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

img,
svg {
  max-width: 100%;
}

h1,
h2,
h3,
p,
li,
a {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin: 0 0 0.75rem;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.25rem);
  max-width: 18ch;
}

h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.45rem;
}

p { margin: 0 0 0.85rem; }

a { color: var(--accent); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.84em;
  background: var(--accent-soft);
  padding: 0.12em 0.35em;
  border-radius: 6px;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.wrap {
  width: min(var(--max), calc(100% - 2 * var(--space)));
  margin-inline: auto;
}

.prose { max-width: 42rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  flex-wrap: wrap;
  min-height: 68px;
  padding: 10px 0;
}

a.logo,
a.logo:visited {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.2rem;
}

a.logo:hover { color: var(--accent); }

.logo-mark {
  display: block;
  width: 28px;
  height: 28px;
  max-width: 28px;
  color: var(--accent);
  flex: 0 0 auto;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  max-width: 100%;
  min-width: 0;
}

.site-header nav a,
.site-header nav a:visited {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--accent);
}

.hero {
  padding: clamp(48px, 9vw, 88px) 0 clamp(8px, 2vw, 20px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lede {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 1.4rem;
  max-width: 100%;
}

a.button,
a.button:visited {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  line-height: 1.2;
  max-width: 100%;
  text-align: center;
  overflow-wrap: anywhere;
}

a.button:hover { background: var(--accent-hover); }

a.button-secondary,
a.button-secondary:visited {
  background: transparent;
  color: var(--accent);
  box-shadow: inset 0 0 0 1.5px var(--accent);
}

a.button-secondary:hover { background: var(--accent-soft); }

.section { padding: clamp(28px, 5vw, 52px) 0; }

.steps,
.grid,
.download-grid,
.stack {
  display: grid;
  gap: 16px;
}

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

.grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.download-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.stack { margin: 1.5rem 0 2rem; }

@media (max-width: 800px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .steps,
  .grid,
  .download-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.card,
.steps li {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  min-width: 0;
}

.card p:last-child,
.steps li p:last-child {
  margin-bottom: 0;
}

.stack h2 {
  font-size: 1.25rem;
  margin: 0 0 0.4rem;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
}

.band {
  background: var(--accent-soft);
  padding: clamp(40px, 7vw, 72px) 0;
}

.band p:last-child { margin-bottom: 0; }

.version {
  color: var(--muted);
  font-size: 0.95rem;
}

.badge {
  display: none;
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.download-card.is-current {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

.download-card.is-current .badge { display: block; }

.note {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 14px 0 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 100%;
}

.page { padding: clamp(36px, 6vw, 72px) 0; }

main ul {
  margin: 0 0 1.2rem;
  padding-left: 1.2rem;
}

main li { margin: 0.35rem 0; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  align-items: center;
}

.site-footer p { margin: 0; }

.site-footer a,
.site-footer a:visited {
  color: var(--accent);
  text-decoration: none;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 400px) {
  .card,
  .steps li { padding: 16px; }
}