:root {
  color-scheme: light dark;
  --page: #f5f7fb;
  --panel: #ffffff;
  --panel-soft: #eef2f8;
  --ink: #142033;
  --muted: #526176;
  --line: #c8d1de;
  --line-strong: #8190a5;
  --accent: #9a5a00;
  --accent-soft: #fff1d3;
  --accent-ink: #4b2a00;
  --danger: #a52a2a;
  --danger-soft: #ffeded;
  --success: #25613c;
  --success-soft: #e8f6ed;
  --code: #101722;
  --code-ink: #e8eef8;
  --shadow: 0 12px 36px rgb(22 34 52 / 10%);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d1320;
    --panel: #131d2c;
    --panel-soft: #1a2637;
    --ink: #edf3fc;
    --muted: #acb9cb;
    --line: #39485d;
    --line-strong: #74849b;
    --accent: #ffc15c;
    --accent-soft: #3b2b0e;
    --accent-ink: #fff4dc;
    --danger: #ff9898;
    --danger-soft: #3e2025;
    --success: #83d9a1;
    --success-soft: #183528;
    --code: #090e16;
    --code-ink: #e8eef8;
    --shadow: 0 16px 42px rgb(0 0 0 / 26%);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  background:
    radial-gradient(
      circle at 10% 0%,
      color-mix(in srgb, var(--accent) 11%, transparent),
      transparent 32rem
    ), var(--page);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.15em;
}

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

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--page);
  transform: translateY(-160%);
}

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

.product-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.product-nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
  text-decoration-thickness: 0.16em;
}

.reading-layout {
  display: grid;
  width: min(1480px, calc(100% - 32px));
  grid-template-columns: minmax(220px, 290px) minmax(0, 820px);
  gap: clamp(28px, 5vw, 72px);
  justify-content: center;
  margin: 0 auto;
  padding: 34px 0 72px;
}

.table-of-contents {
  align-self: start;
}

p,
ul,
ol,
blockquote,
table,
pre {
  margin-top: 0;
  margin-bottom: 1.2rem;
}

.table-of-contents-inner {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  padding: 16px;
  overflow: auto;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
}

.table-of-contents-title {
  margin: 0 0 10px;
  padding: 0;
  border: 0;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

#TOC ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 18px;
}

#TOC > ul {
  padding-left: 0;
  list-style: none;
}

#TOC a {
  color: var(--muted);
  font-size: 0.86rem;
  text-decoration: none;
}

#TOC a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.reading-page {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
  text-wrap: balance;
}

h1 {
  margin: 0 0 28px;
  font-size: clamp(2.25rem, 6vw, 4.4rem);
  letter-spacing: -0.045em;
}

h2 {
  margin: 3.5rem 0 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.025em;
}

h3 {
  margin: 2.25rem 0 0.8rem;
  font-size: 1.2rem;
}

li + li {
  margin-top: 0.34rem;
}

blockquote {
  margin-left: 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 1.08rem;
}

blockquote > :last-child {
  margin-bottom: 0;
}

code {
  padding: 0.12em 0.34em;
  border-radius: 4px;
  background: var(--panel-soft);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

pre {
  padding: 18px;
  overflow: auto;
  border-radius: var(--radius-md);
  background: var(--code);
  color: var(--code-ink);
  box-shadow: var(--shadow);
  line-height: 1.55;
}

pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: 0.86rem;
}

.table-wrap {
  width: 100%;
  margin-bottom: 1.4rem;
  overflow-x: auto;
}

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

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  font-size: 0.9rem;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--panel-soft);
  font-weight: 700;
}

tbody tr:hover {
  background: color-mix(in srgb, var(--accent-soft) 58%, transparent);
}

.page-footer {
  margin-top: 4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.learning-home {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.learning-home header {
  max-width: 820px;
  margin-bottom: 42px;
}

.learning-home header p {
  color: var(--muted);
  font-size: 1.12rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-card h2,
.product-card h3 {
  margin: 0 0 10px;
  padding: 0;
  border: 0;
  font-size: 1.35rem;
}

.product-card p {
  color: var(--muted);
}

.product-card a {
  margin-top: auto;
  font-weight: 700;
}

@media (max-width: 960px) {
  .reading-layout {
    grid-template-columns: 1fr;
  }

  .table-of-contents-inner {
    position: static;
    max-height: none;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 0;
  }
}

@media (max-width: 560px) {
  .product-nav,
  .reading-layout,
  .learning-home {
    width: min(100% - 20px, 1480px);
  }

  .reading-layout {
    padding-top: 20px;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    margin-top: 2.75rem;
  }
}

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