:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --card: #ffffff;
  --link: #0a66c2;
  --focus: #111827;
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0f172a;
  --fg: #e5e7eb;
  --muted: #9ca3af;
  --border: #334155;
  --card: #111827;
  --link: #93c5fd;
  --focus: #e5e7eb;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  line-height: 1.5;
}

img {
  display: block;
  max-width: 100%;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 8px;
}

.container {
  width: 100%;
  max-width: 840px;
  margin: 0 auto;
  padding: 0 20px;
}

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  flex-wrap: wrap;
}

.header__link {
  text-decoration: none;
  font-weight: 600;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand__logo {
  border-radius: 12px;
}

.brand__name {
  font-weight: 700;
  letter-spacing: -0.01em;
}

main {
  padding: 20px 0 28px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  margin: 0;
}

.h1 {
  margin: 0;
  font-size: clamp(24px, 4vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 14px;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.linkGrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 16px;
}

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

.linkCard {
  display: block;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  text-decoration: none;
  color: inherit;
}

.linkCard:hover {
  border-color: var(--muted);
}

.linkCard__title {
  font-weight: 700;
}

.linkCard__meta {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.doc {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 14px;
  line-height: 1.55;
}

.docLinks {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.docLink {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  text-decoration: none;
  color: inherit;
}

.docLink__title {
  font-weight: 700;
}

.docLink__url {
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
  word-break: break-all;
}

.footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer__inner {
  padding: 16px 0;
}

@media (max-width: 640px) {
  .container {
    padding: 0 12px;
  }

  .header__inner {
    align-items: flex-start;
    padding: 12px 0;
  }

  .header__link {
    margin-left: 0;
  }

  .brand {
    gap: 8px;
  }

  .brand__logo {
    width: 40px;
    height: 40px;
  }

  main {
    padding: 14px 0 20px;
  }

  .card {
    padding: 16px;
    border-radius: 14px;
  }

  .doc {
    font-size: 13px;
    line-height: 1.6;
  }

  .small {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .header__inner {
    flex-direction: column;
  }

  .header__link {
    padding-top: 2px;
  }

  .linkGrid {
    gap: 10px;
  }

  .docLinks {
    gap: 8px;
  }
}