:root {
  --bg: #dce0e8;
  --page-bg: #dce0e8;
  --fg: #4c4f69;
  --muted: #6c6f85;
  --border: #bcc0cc;
  --link: #1e66f5;
  --panel: #ccd0da;
  --hero: #bcc0cc;
  --ring: #7287fd;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme-mode="system"] {
    --bg: #11111b;
    --page-bg: linear-gradient(
      180deg,
      #090d18 0%,
      #0f1220 28%,
      #11111b 58%,
      #11111b 100%
    );
    --fg: #b9c2df;
    --muted: #8d98b6;
    --border: #3a3d52;
    --link: #7ea7f7;
    --panel: #141520;
    --hero: #1e1e2e;
    --ring: #9ea9ff;
  }
}

:root[data-theme-mode="light"] {
  --bg: #dce0e8;
  --page-bg: #dce0e8;
  --fg: #4c4f69;
  --muted: #6c6f85;
  --border: #bcc0cc;
  --link: #1e66f5;
  --panel: #ccd0da;
  --hero: #bcc0cc;
  --ring: #7287fd;
}

:root[data-theme-mode="dark"] {
  --bg: #11111b;
  --page-bg: linear-gradient(
    180deg,
    #090d18 0%,
    #0f1220 28%,
    #11111b 58%,
    #11111b 100%
  );
  --fg: #b9c2df;
  --muted: #8d98b6;
  --border: #3a3d52;
  --link: #7ea7f7;
  --panel: #141520;
  --hero: #1e1e2e;
  --ring: #9ea9ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--page-bg);
  color: var(--fg);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    Apple Color Emoji,
    Segoe UI Emoji;
  line-height: 1.65;
  overflow-x: hidden;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.theme-control {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  color: var(--fg);
  font-size: 0.9rem;
}

.theme-control:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

h1 {
  margin-top: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.02em;
}

p,
ul,
ol,
blockquote,
pre {
  margin: 0.9rem 0;
}

ul,
ol {
  padding-left: 1.4rem;
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

strong {
  font-weight: 650;
}

blockquote {
  margin: 1.1rem 0;
  border-left: 4px solid var(--ring);
  padding: 0.35rem 0 0.35rem 0.9rem;
  color: var(--muted);
}

blockquote p {
  margin: 0.2rem 0;
}

code {
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    Liberation Mono,
    Courier New,
    monospace;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.92em;
}

:not(pre) > code {
  padding: 0.12rem 0.36rem;
  background: color-mix(in srgb, var(--panel) 85%, transparent);
}

.hero {
  --hero-content-width: min(70ch, calc(100vw - 2.5rem));
  position: relative;
  width: 100vw;
  margin: 0 0 3.5rem calc(50% - 50vw);
  min-height: 68svh;
  padding: clamp(1.5rem, 3.5vw, 2.8rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(180deg, #e9edf6 0%, #d4dae8 100%);
  text-align: left;
  color: #1f2430;
}

.hero::after {
  content: none;
}

.hero-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  width: var(--hero-content-width);
  margin-bottom: 1rem;
}

.hero-header h1 {
  color: #1a2031;
  margin-bottom: 0;
}

.hero p {
  color: #37415f;
  margin: 0.2rem 0;
  width: var(--hero-content-width);
  max-width: 100%;
}

.expressive-code {
  margin: 1rem 0;
}

details {
  margin: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

details + details {
  border-top: 0;
}

details > summary {
  cursor: pointer;
  list-style: none;
  font-weight: 650;
  padding: 0.75rem 1.4rem 0.75rem 0;
  position: relative;
}

details > summary::-webkit-details-marker {
  display: none;
}

details > summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-weight: 500;
  font-size: 1.1rem;
}

details[open] > summary::after {
  content: "−";
}

details > *:not(summary) {
  margin: 0;
  padding: 0 0 0.8rem;
  color: var(--muted);
}

.site-disclosure {
  margin-top: 2.5rem;
  margin-bottom: 0.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

:root[data-theme-mode="dark"] .hero {
  background:
    linear-gradient(180deg, rgb(8 11 20 / 82%), rgb(4 6 12 / 92%)),
    url("/og.png");
  background-size: cover;
  background-position: center;
  color: #edf2ff;
}

:root[data-theme-mode="dark"] .hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(140px, 24svh, 320px);
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgb(17 17 27 / 0%) 0%,
    rgb(17 17 27 / 18%) 42%,
    rgb(17 17 27 / 46%) 68%,
    var(--bg) 100%
  );
}

:root[data-theme-mode="dark"] .hero-header h1 {
  color: #f8fbff;
}

:root[data-theme-mode="dark"] .hero p {
  color: rgb(237 242 255 / 92%);
}

:root[data-theme-mode="dark"] .hero .theme-control {
  color: #eef3ff;
  border-color: rgb(255 255 255 / 45%);
  background: rgb(10 14 24 / 48%);
  backdrop-filter: blur(4px);
}

@media (prefers-color-scheme: dark) {
  :root[data-theme-mode="system"] .hero {
    background:
      linear-gradient(180deg, rgb(8 11 20 / 82%), rgb(4 6 12 / 92%)),
      url("/og.png");
    background-size: cover;
    background-position: center;
    color: #edf2ff;
  }

  :root[data-theme-mode="system"] .hero::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: clamp(140px, 24svh, 320px);
    pointer-events: none;
    background: linear-gradient(
      180deg,
      rgb(17 17 27 / 0%) 0%,
      rgb(17 17 27 / 18%) 42%,
      rgb(17 17 27 / 46%) 68%,
      var(--bg) 100%
    );
  }

  :root[data-theme-mode="system"] .hero-header h1 {
    color: #f8fbff;
  }

  :root[data-theme-mode="system"] .hero p {
    color: rgb(237 242 255 / 92%);
  }

  :root[data-theme-mode="system"] .hero .theme-control {
    color: #eef3ff;
    border-color: rgb(255 255 255 / 45%);
    background: rgb(10 14 24 / 48%);
    backdrop-filter: blur(4px);
  }
}

@media (max-width: 640px) {
  .hero-header {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
  }

  .hero {
    min-height: 62svh;
    margin-bottom: 2.1rem;
    padding: 1.25rem;
  }

  .hero::after {
    height: clamp(96px, 16svh, 180px);
  }
}