:root {
  color-scheme: light;
  --background: #f5f7fa;
  --surface: #ffffff;
  --surface-muted: #eef2f6;
  --text: #111827;
  --muted: #56606f;
  --subtle: #7a8492;
  --border: #d9e0e8;
  --accent: #245f58;
  --accent-2: #3158c9;
  --danger: #a64032;
  --shadow: 0 20px 60px rgba(17, 24, 39, 0.08);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(180deg, #ffffff 0, #f5f7fa 360px), var(--background);
}

a {
  color: inherit;
}

.site-header {
  border-bottom: 1px solid rgba(217, 224, 232, 0.8);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  width: min(1120px, calc(100% - 48px));
  min-height: 72px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid #c9d3df;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.08);
}

.brand-mark::before {
  width: 16px;
  height: 18px;
  border: 2px solid var(--accent);
  border-top-width: 5px;
  border-radius: 3px;
  content: "";
}

.brand small {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--text);
}

main {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 44px;
  align-items: start;
  padding: 72px 0 46px;
}

.hero-copy {
  max-width: 680px;
}

h1 {
  max-width: 620px;
  margin: 0;
  font-size: 50px;
  line-height: 1.08;
  font-weight: 800;
}

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.download-panel,
.runtime-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.download-panel {
  width: min(560px, 100%);
  margin-top: 34px;
  padding: 24px;
}

.download-panel__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--subtle);
  font-size: 13px;
  font-weight: 650;
}

.download-panel__meta span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 10px;
  background: #fbfcfd;
}

.download-panel h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.18;
}

.download-panel p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button,
.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
}

.button {
  min-width: 190px;
  padding: 0 18px;
  border: 1px solid #111827;
  background: #111827;
  color: #ffffff;
}

.button:hover {
  background: #0b1220;
}

.button[aria-disabled="true"] {
  border-color: #cad3dd;
  background: #dfe5ec;
  color: #697586;
  pointer-events: none;
}

.text-link {
  padding: 0 6px;
  color: var(--accent-2);
}

.text-link:hover {
  color: #1d3f96;
}

.runtime-panel {
  padding: 22px;
}

.runtime-panel h2 {
  margin: 0;
  font-size: 18px;
}

.runtime-list {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
}

.runtime-item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.runtime-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.runtime-item dt {
  color: var(--subtle);
  font-size: 13px;
  font-weight: 700;
}

.runtime-item dd {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.platform-section {
  border-top: 1px solid var(--border);
  padding: 38px 0 72px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0;
  font-size: 24px;
}

.section-heading p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.platform-list {
  display: grid;
  gap: 10px;
}

.platform-row {
  display: grid;
  min-height: 78px;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  background: var(--surface);
}

.platform-row.is-recommended {
  border-color: rgba(36, 95, 88, 0.42);
  box-shadow: inset 4px 0 0 var(--accent);
}

.platform-row h3 {
  margin: 0;
  font-size: 16px;
}

.platform-row p,
.platform-empty {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.platform-row__action {
  display: inline-flex;
  min-width: 96px;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--text);
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
}

.platform-row__action:hover {
  border-color: #b6c1cd;
  background: #f9fafb;
}

.platform-row__action[aria-disabled="true"] {
  color: var(--subtle);
  background: var(--surface-muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--subtle);
  font-size: 13px;
}

.site-footer__inner {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 48px;
  }

  .runtime-panel {
    width: min(560px, 100%);
  }
}

@media (max-width: 640px) {
  .site-header__inner,
  main,
  .site-footer__inner {
    width: min(100% - 32px, 1120px);
  }

  .site-header__inner {
    min-height: 64px;
  }

  .site-nav {
    display: none;
  }

  .hero {
    gap: 28px;
    padding: 36px 0 34px;
  }

  h1 {
    font-size: 36px;
    line-height: 1.12;
  }

  .lead {
    font-size: 16px;
  }

  .download-panel {
    padding: 18px;
  }

  .download-panel h2 {
    font-size: 24px;
  }

  .download-actions,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .button,
  .text-link {
    width: 100%;
  }

  .runtime-item,
  .platform-row {
    grid-template-columns: 1fr;
  }

  .platform-row__action {
    width: 100%;
  }
}