@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Syne:wght@500;600;700;800&display=swap");

:root {
  --bg0: #07080c;
  --bg1: #0f1118;
  --bg2: #161a24;
  --surface: rgba(22, 26, 36, 0.72);
  --surface-solid: #141822;
  --stroke: rgba(255, 255, 255, 0.09);
  --stroke-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eaef;
  --text-soft: #9aa3b5;
  --muted: #6b7287;
  --accent: #5eead4;
  --accent-dim: rgba(94, 234, 212, 0.14);
  --accent-hot: #2dd4bf;
  --warn: #fcd34d;
  --radius: 6px;
  --radius-lg: 14px;
  --radius-xl: 22px;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-display: "Syne", system-ui, sans-serif;
  --shadow-elevated: 0 24px 80px rgba(0, 0, 0, 0.45);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 4.5rem;
  --max: 40rem;
  --max-wide: 52rem;
}

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

html {
  scroll-behavior: smooth;
}

::selection {
  background: rgba(94, 234, 212, 0.28);
  color: var(--text);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--text-soft);
  background-color: var(--bg0);
  background-image:
    radial-gradient(120% 90% at 15% -20%, rgba(94, 234, 212, 0.09), transparent 55%),
    radial-gradient(80% 60% at 100% 10%, rgba(99, 102, 241, 0.08), transparent 50%),
    radial-gradient(ellipse 100% 80% at 50% 100%, #0c0e14, var(--bg0));
  background-attachment: fixed;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  opacity: 1;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.18s var(--ease-out), opacity 0.18s;
}

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

.prose a {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.75rem;
  padding: 0.65rem 1.15rem;
  background: var(--accent);
  color: var(--bg0);
  font-weight: 700;
  font-size: 0.875rem;
  z-index: 1000;
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus {
  left: 0.75rem;
  outline: 3px solid var(--warn);
  outline-offset: 2px;
}

/* Mobile menu backdrop */
body:has(.nav-toggle-input:checked)::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(2, 4, 10, 0.72);
  backdrop-filter: blur(4px);
  z-index: 45;
  animation: fade-in 0.22s var(--ease-out);
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

/* ——— Header ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--stroke);
  background: rgba(7, 8, 12, 0.78);
  backdrop-filter: blur(18px) saturate(140%);
}

.header-inner {
  max-width: 88rem;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}

.brand:hover {
  color: var(--text);
}

.brand-wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.8vw, 1.55rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.brand-accent {
  color: var(--accent);
  font-weight: 700;
}

.nav-toggle-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-label {
  display: none;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  cursor: pointer;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke-strong);
  background: var(--surface);
  padding: 0;
  transition: background 0.2s, border-color 0.2s, transform 0.2s var(--ease-spring);
}

.nav-toggle-label:hover {
  background: var(--bg2);
  border-color: var(--accent);
}

.nav-toggle-label span:nth-child(n + 2) {
  display: none;
}

.nav-toggle-label span:first-child {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  position: relative;
  transition: transform 0.25s var(--ease-out), opacity 0.2s;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1.15rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.25s var(--ease-out);
}

.nav-toggle-label span::before {
  top: -7px;
}

.nav-toggle-label span::after {
  top: 7px;
}

.nav-toggle-input:checked ~ .nav-toggle-label span:first-child {
  background: transparent;
}

.nav-toggle-input:checked ~ .nav-toggle-label span:first-child::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle-input:checked ~ .nav-toggle-label span:first-child::after {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.site-nav a {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-soft);
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  background: transparent;
  transition:
    color 0.18s,
    background 0.18s,
    border-color 0.18s,
    transform 0.22s var(--ease-spring);
}

.site-nav a:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--stroke);
  transform: translateY(-1px);
}

.site-nav a[aria-current="page"] {
  color: var(--bg0);
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(94, 234, 212, 0.25);
}

@media (max-width: 720px) {
  .nav-toggle-label {
    display: flex;
  }

  .site-nav {
    position: fixed;
    left: 1rem;
    right: 1rem;
    top: calc(var(--header-h) + 0.75rem);
    flex-direction: column;
    padding: 1rem;
    background: var(--surface-solid);
    border: 1px solid var(--stroke-strong);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-elevated);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.98);
    transition:
      max-height 0.42s var(--ease-out),
      opacity 0.25s,
      visibility 0.25s,
      transform 0.32s var(--ease-spring);
    z-index: 60;
    align-items: stretch;
  }

  .nav-toggle-input:checked ~ .site-nav {
    max-height: 24rem;
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }

  .site-nav a {
    text-align: center;
    width: 100%;
    padding: 0.95rem 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    background: var(--bg2);
  }
}

/* ——— Age strip ——— */
.age-banner {
  margin: 0;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bg0);
  padding: 0.55rem clamp(1rem, 4vw, 2.5rem);
  background: linear-gradient(105deg, var(--accent) 0%, var(--accent-hot) 48%, #34d399 100%);
  text-align: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.15);
}

/* ——— Main ——— */
.page {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: clamp(1.75rem, 5vw, 3rem) clamp(1rem, 4vw, 2.5rem) clamp(3.5rem, 10vw, 5rem);
}

/* ——— Hero ——— */
.page-hero {
  margin-bottom: clamp(2rem, 5vw, 2.75rem);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  padding-left: clamp(1.5rem, 4vw, 2.75rem);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, var(--accent-dim) 0%, transparent 42%),
    var(--surface-solid);
  border: 1px solid var(--stroke-strong);
  box-shadow: var(--shadow-elevated);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -15%;
  width: min(55vw, 22rem);
  height: min(55vw, 22rem);
  background: radial-gradient(circle, rgba(94, 234, 212, 0.12), transparent 68%);
  pointer-events: none;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  opacity: 0.85;
}

.page-hero h1,
.page-hero .lead,
.page-hero .eyebrow {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 5vw, 3rem);
  letter-spacing: -0.045em;
  line-height: 1.08;
  margin: 0 0 1rem;
  color: var(--text);
  max-width: min(100%, 38rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-hot);
  margin-bottom: 1rem;
}

.eyebrow::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.lead {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 400;
  color: var(--text-soft);
  max-width: 48ch;
  line-height: 1.65;
}

/* ——— Prose ——— */
.prose {
  max-width: var(--max);
  margin: 0;
  padding: clamp(1.5rem, 3vw, 2rem) clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--radius-xl);
  background: linear-gradient(165deg, rgba(20, 24, 34, 0.55), rgba(12, 14, 20, 0.4));
  border: 1px solid var(--stroke);
  box-shadow: 0 4px 48px rgba(0, 0, 0, 0.2);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose > *:last-child {
  margin-bottom: 0;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.5vw, 1.68rem);
  font-weight: 700;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.18;
  padding: 0 0 0.5rem;
  border-bottom: 1px solid var(--stroke);
  position: relative;
}

.prose h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 3.5rem;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.prose h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 1.65rem 0 0.45rem;
  color: var(--text);
  letter-spacing: -0.015em;
}

.prose em {
  color: var(--muted);
  font-style: italic;
}

.prose p,
.prose li {
  color: var(--text-soft);
}

.prose strong {
  color: var(--text);
  font-weight: 600;
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

.prose li {
  margin: 0.4rem 0;
}

.prose li::marker {
  color: var(--accent);
}

.callout {
  margin: 2rem 0;
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke-strong);
  background: linear-gradient(120deg, var(--accent-dim), rgba(99, 102, 241, 0.06));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.callout p {
  margin: 0;
  color: var(--text-soft);
}

.callout strong {
  color: var(--text);
}

/* Legacy / hub */
.home-layout {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 960px) {
  .home-layout {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

.home-hero-panel {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: var(--surface);
}

.mesh-deco {
  display: none;
}

.home-hero-panel .page-hero h1 {
  max-width: none;
}

.hub-intro {
  margin-bottom: 1.75rem;
}

.hub-intro p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 52ch;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
  gap: 1rem;
}

.hub-card {
  display: flex;
  flex-direction: column;
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: var(--surface-solid);
  text-decoration: none;
  color: inherit;
  transition:
    border-color 0.2s,
    transform 0.28s var(--ease-spring),
    box-shadow 0.28s;
  min-height: 8.5rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.hub-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.35);
}

.hub-card h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.45rem;
  border: none;
  padding: 0;
}

.hub-card h2::after {
  display: none;
}

.hub-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  flex-grow: 1;
}

.hub-card .hub-arrow {
  margin-top: 1.1rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

/* ——— Tables ——— */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.85rem 0;
  font-size: 0.875rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--stroke-strong);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
}

.prose th,
.prose td {
  border: 1px solid var(--stroke);
  padding: 0.85rem 1rem;
  text-align: left;
  vertical-align: top;
}

.prose tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.prose tbody tr:nth-child(odd) {
  background: rgba(255, 255, 255, 0.04);
}

.prose th {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: linear-gradient(180deg, #1a1f2e, #12151e);
  color: var(--accent);
  border-color: var(--stroke-strong);
}

/* ——— Footer ——— */
.site-footer {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  padding: 1.75rem clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--radius-xl);
  background: var(--surface-solid);
  border: 1px solid var(--stroke-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: 0 -8px 48px rgba(0, 0, 0, 0.15);
}

.site-footer p {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

.site-footer nav a {
  font-size: 0.72rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.45rem 0.65rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    color 0.18s,
    background 0.18s,
    border-color 0.18s;
}

.site-footer nav a:hover {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--stroke);
}

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

.code-inline {
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.86em;
  background: rgba(94, 234, 212, 0.08);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  border: 1px solid var(--stroke);
  color: var(--accent-hot);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  body:has(.nav-toggle-input:checked)::after {
    animation: none;
  }
}

</think>
Fixing a CSS typo introduced in `.lead`.

<｜tool▁calls▁begin｜><｜tool▁call▁begin｜>
StrReplace