@import url('https://fonts.googleapis.com/css2?family=Geist:wght@400;500;700&family=Geist+Mono:wght@500;700&display=swap');

:root {
  --color-primary: #afc4f1;
  --color-secondary: #323744;
  --color-neutral-50: #000000;
  --color-neutral-100: #ffffff;
  --color-neutral-200: #e9e9e9;
  --color-bg: #ffffff;
  --color-text: #000001;
  --color-muted: #323744;
  --color-accent: #1e7ea8;
  --surface-soft: #f7fbff;
  --shadow-sm: rgba(0, 0, 0, 0) 0px 0px 0px 0px,
    rgba(0, 0, 0, 0) 0px 0px 0px 0px,
    rgba(0, 0, 0, 0) 0px 0px 0px 0px,
    rgba(0, 0, 0, 0) 0px 0px 0px 0px,
    rgba(0, 0, 0, 0.25) 0px 25px 50px -12px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 24px;
  --radius-full: 32px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: 'Geist', 'GeistSans', sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(175, 196, 241, 0.35), transparent 32%),
    linear-gradient(to top, oklch(0.9703 0 0) 0px, rgba(0, 0, 0, 0) 100%),
    var(--color-bg);
}

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

.container {
  width: min(1000px, calc(100vw - 40px));
  margin: 0 auto;
}

.topbar {
  padding: 22px 0 0;
}

.topbar-inner,
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

.nav,
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a,
.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.shell {
  padding: 56px 0 112px;
}

.hero {
  text-align: center;
  margin-bottom: 56px;
}

.kicker {
  margin: 0 0 16px;
  font-family: 'Geist Mono', 'GeistMono', monospace;
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-muted);
}

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 60px);
  line-height: clamp(40px, 5.5vw, 72px);
  letter-spacing: -0.05em;
}

.hero p {
  max-width: 760px;
  margin: 16px auto 0;
  font-size: 18px;
  line-height: 28px;
  color: var(--color-muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  align-items: start;
}

.card {
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.article {
  padding: 32px;
}

.meta {
  margin: 0 0 24px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 20px;
}

.section {
  padding: 24px 0;
  border-top: 1px solid var(--color-neutral-200);
}

.section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.section h2 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 28px;
}

.section p,
.section li {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 24px;
}

.section ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.sidebar {
  padding: 24px;
  display: grid;
  gap: 16px;
  position: sticky;
  top: 24px;
}

.sidebar h3 {
  margin: 0;
  font-size: 16px;
  line-height: 24px;
}

.sidebar p,
.sidebar li {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 22px;
}

.sidebar ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary);
  background: var(--color-neutral-100);
  color: var(--color-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.button.primary {
  background: var(--color-neutral-50);
  border-color: var(--color-neutral-50);
  color: var(--color-neutral-100);
}

.callout {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--surface-soft);
  border: 1px solid var(--color-primary);
}

.footer {
  border-top: 1px solid var(--color-neutral-200);
  background: rgba(255, 255, 255, 0.9);
}

.footer-inner {
  padding: 20px 0;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .topbar-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .article,
  .sidebar {
    padding: 24px;
  }

  h1 {
    font-size: 36px;
    line-height: 40px;
  }
}