:root {
  --ink: #17324d;
  --ink-soft: #38556d;
  --muted: #5f6f83;
  --paper: #f6f5ef;
  --surface: #fffef9;
  --teal: #0f766e;
  --teal-pale: #d9eeea;
  --blue-pale: #e8f0f6;
  --amber: #8b5a10;
  --border: #d8dfe2;
  --border-strong: #b9c6cd;
  --sans: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --content: 1320px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 82px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #0b5f59;
}

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

code,
pre {
  font-family: var(--mono);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.notebook-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: center;
  min-height: 64px;
  padding: 0 28px;
  background: rgba(255, 254, 249, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.notebook-topbar a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 750;
  text-decoration: none;
}

.notebook-topbar a:last-child {
  justify-self: end;
}

.notebook-topbar span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.notebook-shell {
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 42px 48px 88px;
}

.notebook-banner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
  padding: clamp(26px, 5vw, 48px);
  color: white;
  background: var(--ink);
}

.notebook-banner .eyebrow {
  margin: 0;
  color: #8fd4cc;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.notebook-banner h1 {
  max-width: 800px;
  margin: 14px 0 12px;
  color: white;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.notebook-banner p {
  max-width: 720px;
  margin: 0;
  color: #c7d4de;
}

.notebook-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.notebook-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 9px 15px;
  color: white;
  border: 1px solid #7090a4;
  border-radius: 4px;
  font-size: 0.76rem;
  font-weight: 750;
  text-decoration: none;
}

.notebook-button-primary {
  color: var(--ink);
  background: white;
  border-color: white;
}

.notebook-button:hover {
  color: var(--ink);
  background: white;
}

.notebook-document {
  padding: clamp(24px, 4.4vw, 58px);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 18px 50px rgba(23, 50, 77, 0.07);
}

.anchor-link {
  display: none;
}

.notebook-document h2,
.notebook-document h3 {
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.18;
}

.notebook-document h2 {
  margin: 1.8em 0 0.65em;
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  font-weight: 500;
  letter-spacing: -0.025em;
}

.notebook-document h3 {
  margin: 1.45em 0 0.55em;
  font-size: 1.35rem;
}

.notebook-document p,
.notebook-document li {
  color: var(--ink-soft);
}

.notebook-document strong {
  color: var(--ink);
}

.cell {
  margin: 26px 0;
}

.text_cell.rendered {
  margin: 34px 0;
}

.code_cell {
  margin: 32px 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
}

.code_cell .input {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  background: #f7f9f8;
  border-bottom: 1px solid var(--border);
}

.code_cell .output_wrapper {
  display: block;
  background: var(--surface);
}

.code_cell .output {
  display: block;
}

.output_area {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: start;
}

.prompt {
  padding: 16px 12px;
  color: #788b9a;
  background: #edf1f0;
  font-family: var(--mono);
  font-size: 0.65rem;
  line-height: 1.4;
}

.inner_cell {
  min-width: 0;
}

.input_area {
  overflow-x: auto;
}

div.highlight {
  margin: 0;
  padding: 17px 20px;
  overflow-x: auto;
  background: #f7f9f8;
}

div.highlight pre {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.72;
}

.output_subarea {
  width: 100%;
  min-width: 0;
  padding: 16px 20px;
  overflow-x: auto;
}

.output_subarea img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 10px auto 20px;
  background: white;
  border: 1px solid #edf0f1;
}

.output_png {
  padding: clamp(16px, 2.4vw, 26px);
  background: #fbfcf9;
}

.output_subarea pre {
  max-width: 100%;
  margin: 0;
  overflow-x: auto;
  color: var(--ink-soft);
  font-size: 0.77rem;
}

.output_subarea table {
  width: 100%;
  min-width: 680px;
  margin: 8px 0 18px;
  overflow: hidden;
  border-collapse: collapse;
  border: 0;
  font-size: 0.8rem;
}

.output_subarea th,
.output_subarea td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: right;
}

.output_subarea th:first-child,
.output_subarea td:first-child {
  text-align: left;
}

.output_subarea thead th {
  color: var(--muted);
  background: #edf4f2;
  font-size: 0.67rem;
  text-transform: uppercase;
}

.notebook-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}

.notebook-document .text_cell.rendered h2 {
  padding-top: 26px;
  border-top: 1px solid var(--border);
}

.notebook-document .text_cell.rendered:first-of-type h2 {
  padding-top: 0;
  border-top: 0;
}

.notebook-document .text_cell.render_before + .code_cell {
  margin-top: 18px;
}

.notebook-document .code_cell + .text_cell.rendered {
  margin-top: 44px;
}

.notebook-pager a {
  display: block;
  min-height: 88px;
  padding: 18px 20px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.notebook-pager a:hover {
  background: var(--teal-pale);
  border-color: var(--teal);
}

.notebook-pager span,
.notebook-pager strong {
  display: block;
}

.notebook-pager span {
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.notebook-pager strong {
  margin-top: 5px;
  font-family: var(--serif);
  font-size: 1.08rem;
}

.notebook-pager .next {
  text-align: right;
}

.notebook-footer {
  padding: 28px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
  text-align: center;
}

@media (max-width: 900px) {
  .notebook-topbar {
    grid-template-columns: 1fr auto;
    padding: 0 16px;
  }

  .notebook-topbar span {
    display: none;
  }

  .notebook-shell {
    padding: 20px 14px 54px;
  }

  .notebook-banner {
    grid-template-columns: 1fr;
    padding: 26px 22px;
  }

  .notebook-actions {
    justify-content: flex-start;
  }

  .notebook-document {
    padding: 18px 14px;
  }

  .code_cell .input {
    grid-template-columns: 1fr;
  }

  .code_cell .input > .prompt {
    display: none;
  }

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

  .output_area > .prompt {
    display: none;
  }

  .prompt {
    padding: 12px 5px;
    font-size: 0.58rem;
  }

  div.highlight {
    padding: 13px 12px;
  }

  div.highlight pre {
    font-size: 0.74rem;
  }

  .output_subarea {
    padding: 14px;
  }

  .output_subarea table {
    min-width: 620px;
  }

  .notebook-pager {
    grid-template-columns: 1fr;
  }

  .notebook-pager .next {
    text-align: left;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media print {
  .notebook-topbar,
  .notebook-actions,
  .notebook-pager {
    display: none !important;
  }

  body {
    background: white;
    font-size: 10pt;
  }

  .notebook-shell {
    padding: 0;
  }

  .notebook-banner {
    color: black;
    background: white;
    padding: 0 0 20px;
    border-bottom: 2px solid black;
  }

  .notebook-banner h1 {
    color: black;
  }

  .notebook-banner p {
    color: #333;
  }

  .notebook-document {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
}