:root {
  color-scheme: light;
  --bg: #f7f4ef;
  --bg-accent: #ebe5db;
  --panel: rgba(255, 255, 255, 0.62);
  --text: #171717;
  --muted: #5f5a53;
  --line: rgba(23, 23, 23, 0.12);
  --shadow: 0 28px 80px rgba(23, 23, 23, 0.08);
  --radius: 28px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family:
    "IBM Plex Sans",
    "Inter",
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, var(--bg-accent) 0%, transparent 42%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
  font-size: 16px;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.hero {
  width: min(100%, 720px);
  padding: clamp(32px, 6vw, 72px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  text-align: center;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.075em;
  font-weight: 700;
}

.lede {
  margin: 18px auto 0;
  max-width: 22rem;
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.7;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
  min-width: 150px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--text);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(23, 23, 23, 0.18);
}

.button:focus-visible {
  outline: 3px solid rgba(23, 23, 23, 0.28);
  outline-offset: 4px;
}

.switch-link {
  display: block;
  width: fit-content;
  margin: 18px auto 0;
  color: var(--muted);
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;
  font-size: 0.78rem;
  text-decoration: none;
  transition: color 180ms ease;
}

.switch-link:hover,
.switch-link:focus-visible {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.style-b {
  --bg: #f7f4ef;
  --bg-accent: #ebe5db;
  --panel: rgba(255, 255, 255, 0.62);
  --text: #171717;
  --muted: #5f5a53;
  --line: rgba(23, 23, 23, 0.12);
  --shadow: 0 28px 80px rgba(23, 23, 23, 0.08);
  background:
    radial-gradient(circle at top, var(--bg-accent) 0%, transparent 44%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
}

.style-b .hero {
  border-radius: 12px;
  text-align: center;
}

.style-b h1 {
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
  monospace;
  font-size: clamp(2.4rem, 8vw, 5.8rem);
  letter-spacing: 0.015em;
}

.style-b .lede {
  margin-left: auto;
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
}

.repo-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  color: var(--text);
  font-family:
    "IBM Plex Mono",
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;
  font-size: 0.9rem;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  transition: opacity 180ms ease;
}

.github-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.repo-link:hover,
.repo-link:focus-visible {
  opacity: 0.62;
}

.style-b .button {
  border-radius: 8px;
  background: var(--text);
  color: #fff;
}

.style-b .button:hover {
  box-shadow: 0 16px 36px rgba(23, 23, 23, 0.18);
}

.style-b .button:focus-visible {
  outline-color: rgba(23, 23, 23, 0.28);
}

.style-b .switch-link:hover,
.style-b .switch-link:focus-visible {
  color: var(--text);
}

@media (max-width: 640px) {
  .hero {
    border-radius: 22px;
    padding: 28px 22px;
  }

  .lede {
    max-width: 18rem;
  }
}