:root {
  color-scheme: light dark;
  --c-dark: #f3f5f7;
  --c-dark2: #fbfcfd;
  --c-dark3: #e8ecf0;
  --c-blue: #a31b2b;
  --c-blue2: #7f1421;
  --c-sky: #a31b2b;
  --c-gold: #a31b2b;
  --c-gold2: #a31b2b;
  --c-white: #15191f;
  --c-muted: #5d6672;
  --c-border: #cfd5dc;
  --c-line: #dde2e7;
  --ff-head: "Space Grotesk", system-ui, sans-serif;
  --ff-body: "IBM Plex Sans", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-dark: #0d1117;
    --c-dark2: #131922;
    --c-dark3: #1a222d;
    --c-white: #eef1f5;
    --c-muted: #a1a9b4;
    --c-border: #303a47;
    --c-line: #252e39;
  }
}

html {
  background: var(--c-dark);
}

body {
  min-width: 320px;
  background:
    radial-gradient(circle at 84% 4%, rgba(163, 27, 43, 0.08), transparent 26rem),
    var(--c-dark);
  color: var(--c-white);
  font-family: var(--ff-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 30;
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  color: #fff;
  background: var(--c-blue);
  transform: translateY(-180%);
  transition: transform 0.18s ease;
}

.skip-link:focus {
  color: #fff;
  transform: translateY(0);
}

h1,
h2,
h3 {
  text-wrap: balance;
}

p,
li {
  overflow-wrap: anywhere;
  text-wrap: pretty;
}

::selection {
  color: #fff;
  background: var(--c-blue);
}

a {
  color: var(--c-blue);
  text-underline-offset: 0.2em;
}

a,
button {
  touch-action: manipulation;
}

a:hover {
  color: var(--c-blue2);
}

a:focus-visible {
  border-radius: 3px;
  outline: 3px solid color-mix(in srgb, var(--c-blue) 35%, transparent);
  outline-offset: 3px;
}

.topbar {
  top: 10px;
  width: min(980px, calc(100% - 20px));
  margin: 10px auto 0;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--c-border);
  border-radius: 16px;
  background: color-mix(in srgb, var(--c-dark2) 90%, transparent);
  box-shadow: 0 14px 44px rgba(35, 43, 54, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.topbar-inner {
  max-width: none;
}

.topbar a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  font-family: var(--ff-head);
  font-size: 0.78rem;
  text-decoration: none;
}

.topbar-back {
  color: var(--c-white);
}

.topbar-nav {
  gap: 0.2rem;
}

.topbar-nav a {
  color: var(--c-muted);
}

.topbar-nav a:hover {
  color: var(--c-white);
  background: var(--c-dark3);
}

.topbar-nav a.active {
  color: #fff;
  background: var(--c-blue);
}

.wrap {
  max-width: 860px;
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 4vw, 2rem) 2rem;
}

h1 {
  max-width: 18ch;
  margin-bottom: 1rem;
  color: var(--c-white);
  background: none;
  font-family: var(--ff-head);
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.065em;
  -webkit-text-fill-color: currentColor;
  overflow-wrap: anywhere;
}

.lead {
  max-width: 64ch;
  margin-bottom: 4rem;
  color: var(--c-muted);
  font-size: 1rem;
}

h2 {
  margin: 3.25rem 0 1rem;
  padding: 0;
  border: 0;
  color: var(--c-white);
  font-family: var(--ff-head);
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  font-weight: 600;
  letter-spacing: -0.025em;
}

h3 {
  color: var(--c-white);
  font-size: 1rem;
}

p,
li {
  color: var(--c-muted);
}

strong {
  color: var(--c-white);
}

.block {
  margin-block: 1rem;
  padding: 1.25rem 1.35rem;
  border-color: var(--c-border);
  border-radius: 16px;
  background: color-mix(in srgb, var(--c-dark2) 88%, transparent);
}

.block p {
  color: var(--c-white);
}

ul,
ol {
  margin-left: 1.35rem;
}

li {
  margin-bottom: 0.55rem;
  padding-left: 0.2rem;
}

code {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  color: var(--c-white);
  background: var(--c-dark3);
  font-size: 0.88em;
}

.note {
  padding: 1rem 1.15rem;
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-blue);
  border-radius: 10px;
  background: var(--c-dark2);
  font-style: normal;
}

hr {
  margin-block: 3rem;
  border-color: var(--c-border);
}

footer {
  margin-top: 5rem;
  padding: 3rem 1rem;
  border-color: var(--c-border);
  background: color-mix(in srgb, var(--c-dark2) 80%, transparent);
}

.footer-copy,
.footer-links {
  color: var(--c-muted);
  font-size: 0.78rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--c-muted);
}

@media (max-width: 620px) {
  .topbar-inner {
    align-items: stretch;
  }

  .topbar-back {
    width: 100%;
  }

  .topbar-nav {
    width: 100%;
    overflow-x: auto;
  }

  .topbar-nav a {
    flex: 1;
    justify-content: center;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}