:root {
  --bg: #f7f8f5;
  --surface: #ffffff;
  --surface-soft: #eef5f1;
  --ink: #1f2528;
  --muted: #66716f;
  --line: #d8dfdc;
  --teal: #0f766e;
  --teal-dark: #115e59;
  --rust: #c75b12;
  --blue: #2563a6;
  --code-bg: #1f2528;
  --code-ink: #f7f8f5;
  --shadow: 0 14px 34px rgba(31, 37, 40, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: #fbfcfa;
  padding: 24px 20px;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--teal);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-title {
  font-size: 19px;
  font-weight: 760;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 12px;
}

.search {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 18px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
}

.nav-group {
  margin: 20px 0;
}

.nav-title {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.nav-link {
  display: block;
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--ink);
  font-size: 14px;
}

.nav-link:hover {
  background: var(--surface-soft);
  text-decoration: none;
}

.sidebar-footer {
  border-top: 1px solid var(--line);
  margin-top: 22px;
  padding-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.content {
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 245, 0.92);
  padding: 14px 34px;
  position: sticky;
  top: 0;
  z-index: 3;
  backdrop-filter: blur(10px);
}

.topbar a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
}

.topbar a:hover,
.button:hover {
  border-color: var(--teal);
  text-decoration: none;
}

.button.primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 54px 34px 72px;
}

.intro {
  border-bottom: 1px solid var(--line);
  padding-bottom: 36px;
}

.eyebrow {
  color: var(--rust);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

h1 {
  max-width: 860px;
  margin: 0;
  font-size: 46px;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  border-top: 1px solid var(--line);
  margin: 54px 0 16px;
  padding-top: 34px;
  font-size: 28px;
  letter-spacing: 0;
}

h3 {
  margin: 28px 0 10px;
  font-size: 20px;
  letter-spacing: 0;
}

.lead {
  max-width: 820px;
  color: var(--muted);
  font-size: 19px;
  margin: 18px 0 0;
}

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-visual {
  margin: 32px 0 0;
}

.hero-visual img {
  display: block;
  width: min(100%, 304px);
  height: auto;
  border-radius: 8px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 16px;
  box-shadow: var(--shadow);
}

.note strong {
  display: block;
  margin-bottom: 6px;
}

.note p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

.tutorial-block {
  margin: 22px 0 34px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.output-block {
  margin: 18px 0 34px;
}

.output-block h3 {
  margin-top: 0;
}

.output {
  background: #26302e;
  margin-top: 10px;
}

.figure-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 12px;
  box-shadow: var(--shadow);
}

.figure-panel img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 0 auto;
}

.caption {
  color: var(--muted);
  font-size: 13px;
  margin: 10px 4px 2px;
}

pre {
  position: relative;
  overflow-x: auto;
  border-radius: 8px;
  margin: 0;
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 16px;
  font-size: 13px;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:not(pre) > code {
  border-radius: 5px;
  background: #e6ece9;
  color: var(--ink);
  padding: 2px 5px;
  font-size: 0.92em;
}

.copy {
  position: absolute;
  top: 8px;
  right: 8px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--code-ink);
  cursor: pointer;
  font-size: 12px;
  padding: 4px 8px;
}

.copy:hover {
  background: rgba(255, 255, 255, 0.16);
}

table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  background: var(--surface);
  margin: 18px 0;
}

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

th {
  background: var(--surface-soft);
  font-size: 13px;
}

td {
  color: var(--muted);
  font-size: 14px;
}

.interpretation-table td:first-child,
.api-table td:first-child {
  color: var(--ink);
  font-weight: 650;
  width: 24%;
}

.api-entry {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  margin: 20px 0;
  padding: 18px;
}

.api-entry h3 {
  margin-top: 0;
}

.api-entry p {
  color: var(--muted);
}

.signature {
  margin: 12px 0 16px;
}

.api-table {
  margin: 14px 0;
}

.example-modes {
  display: grid;
  gap: 18px;
  margin: 28px 0 0;
  min-width: 0;
}

.mode-example,
.api-entry,
main section {
  scroll-margin-top: 76px;
  min-width: 0;
}

.mode-example h3 {
  font-size: 18px;
  margin: 0 0 6px;
}

.mode-example p {
  color: var(--muted);
  margin: 0 0 10px;
}

.callout {
  border-left: 4px solid var(--teal);
  background: var(--surface-soft);
  border-radius: 8px;
  margin: 20px 0;
  padding: 14px 16px;
}

.callout p {
  margin: 0;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  margin-top: 56px;
  padding-top: 24px;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .topbar {
    justify-content: flex-start;
    overflow-x: auto;
  }

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

  .interpretation-table,
  .api-table {
    display: block;
    overflow-x: auto;
  }

  main {
    padding: 34px 20px 56px;
  }

  h1 {
    font-size: 35px;
  }
}