:root {
  --bg: #ffffff;
  --bg-subtle: #f7f7f5;
  --text: #222222;
  --muted: #666666;
  --line: #dcdcdc;

  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Helvetica Neue", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
}

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

.wrap {
  width: min(960px, calc(100% - 48px));
  margin: 0 auto;
}

.narrow {
  max-width: 760px;
}

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

.site-footer {
  border-top: 0;
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
}

.header-nav-group {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.brand,
.eyebrow,
.section-label,
.language-nav,
.download-notes span:first-child {
  font-family: var(--font-mono);
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.site-nav,
.language-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.site-nav a,
.language-nav,
.language-nav a,
.footer-inner,
.eyebrow,
.section-label {
  color: var(--muted);
}

.site-nav a:hover,
.language-nav a:hover,
.footer-inner a:hover {
  color: var(--text);
}

.language-nav .current {
  color: var(--text);
}

.separator {
  color: var(--line);
}

.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}

.section-alt {
  background: var(--bg-subtle);
}

.hero {
  padding: 88px 0 72px;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

h3 {
  font-size: 1.15rem;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tagline {
  margin: 18px 0 0;
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
  font-weight: 600;
}

.subtag {
  margin: 10px 0 0;
  color: var(--muted);
}

.hero-text {
  margin-top: 24px;
}

.hero-text p,
.narrow p,
.download-notes,
.footer-inner p,
.feature-group li {
  font-size: 1rem;
}

.hero-text p,
.feature-group ul,
.download-notes p,
.footer-inner p {
  margin: 0;
}

.hero-text p + p,
.narrow p + p {
  margin-top: 14px;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-block;
  padding: 0.72em 1.2em;
  border: 1px solid var(--text);
  background: #ffffff;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.4;
}

.button-primary {
  background: var(--text);
  color: #ffffff;
}

.button-secondary {
  background: #ffffff;
  color: var(--text);
}

.feature-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 40px;
  margin-top: 28px;
}

.feature-group h3 {
  margin-bottom: 12px;
}

.feature-group ul {
  padding-left: 1.2em;
}

.feature-group li + li {
  margin-top: 8px;
}

.download-notes {
  margin-top: 28px;
}

.download-notes p {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  min-height: 56px;
}

@media (max-width: 760px) {
  .wrap {
    width: min(100%, calc(100% - 32px));
  }

  .header-inner,
  .footer-inner,
  .header-nav-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .site-nav,
  .language-nav {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .hero {
    padding: 56px 0;
  }

  .section {
    padding: 48px 0;
  }

  .feature-groups {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .download-notes p {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}