:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6f8;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5f66;
  --color-accent: #1a1a1a;
  --color-border: #e2e4e8;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic",
    "Segoe UI", Roboto, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
}

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

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--color-text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

nav.site-nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

nav.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
}

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

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

h1 {
  font-size: 26px;
  margin: 0 0 8px;
}

h2 {
  font-size: 18px;
  margin: 40px 0 12px;
  border-left: 4px solid var(--color-accent);
  padding-left: 10px;
}

p {
  color: var(--color-text);
}

.lead {
  color: var(--color-text-muted);
  font-size: 15px;
  margin-top: 0;
}

.updated {
  color: var(--color-text-muted);
  font-size: 13px;
}

ul {
  padding-left: 1.3em;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 24px;
  font-size: 14px;
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  background: var(--color-bg-alt);
  white-space: nowrap;
}

.hero {
  background: var(--color-bg-alt);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.hero h1 {
  font-size: 34px;
}

.hero p.lead {
  font-size: 17px;
  max-width: 480px;
  margin: 16px auto 0;
}

.features {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 640px) {
  .features {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
}

.feature-card h2 {
  border: none;
  padding: 0;
  margin: 0 0 8px;
  font-size: 16px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 14px;
  margin: 0;
}

.contact-box {
  background: var(--color-bg-alt);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}

.contact-box dt {
  font-weight: 700;
  margin-top: 12px;
}

.contact-box dt:first-child {
  margin-top: 0;
}

.contact-box dd {
  margin: 4px 0 0;
  color: var(--color-text-muted);
}

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

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer-inner nav {
  display: flex;
  gap: 16px;
}

.footer-inner a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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