:root {
  color-scheme: light dark;
  --paper: #f3f5f6;
  --ink: #172028;
  --muted: #5b6872;
  --line: #cfd6da;
  --accent: #0b9b68;
  --accent-dark: #08764f;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", sans-serif;
  line-height: 1.65;
  background: var(--paper);
  color: var(--ink);
}

body {
  margin: 0;
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.site-header__inner,
main,
.site-footer__inner {
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header__inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.92rem;
}

main {
  padding: 72px 0 84px;
}

.intro {
  max-width: 700px;
  margin-bottom: 64px;
}

h1,
h2 {
  letter-spacing: 0;
  line-height: 1.2;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.15rem, 7vw, 4.5rem);
  font-weight: 750;
}

h2 {
  margin: 0 0 20px;
  font-size: 1.35rem;
}

p {
  margin: 0 0 1em;
}

.lede {
  color: var(--muted);
  font-size: 1.12rem;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  background: var(--panel);
  font-weight: 650;
  text-decoration: none;
}

.button--primary {
  border-color: var(--accent-dark);
  color: #ffffff;
  background: var(--accent-dark);
}

.product-shot {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.product-shots {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: 18px;
  align-items: center;
}

.product-shot--hud {
  background: transparent;
}

.section {
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

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

.feature-grid span,
.notice {
  color: var(--muted);
}

.notice {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
}

.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 28px;
}

.sponsor-grid figure {
  margin: 0;
}

.sponsor-grid figcaption {
  margin-bottom: 10px;
  font-weight: 700;
}

.sponsor-grid img {
  display: block;
  width: 100%;
  max-height: 520px;
  border: 1px solid var(--line);
  border-radius: 8px;
  object-fit: contain;
  background: #ffffff;
}

.steps,
.plain-list {
  margin: 0;
  padding-left: 1.3rem;
}

.steps li,
.plain-list li {
  margin: 0 0 12px;
}

.status-line {
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 12px;
  align-items: start;
  margin: 18px 0;
}

.status-line::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 0.5em;
  border-radius: 50%;
  background: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer__inner {
  padding: 28px 0 44px;
  font-size: 0.86rem;
}

@media (max-width: 620px) {
  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  main {
    padding-top: 48px;
  }

  nav {
    width: 100%;
    gap: 10px 18px;
  }

  .feature-grid,
  .sponsor-grid,
  .product-shots {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171c20;
    --ink: #f2f5f6;
    --muted: #a9b3b9;
    --line: #354047;
    --accent: #39d692;
    --accent-dark: #6ee4ae;
    --panel: #1f262b;
  }
}