:root {
  --bg: #f5f6f7;
  --surface: #ffffff;
  --surface-soft: #f8f9fa;
  --text: #202428;
  --muted: #687078;
  --border: #dfe3e6;
  --border-strong: #cbd1d5;
  --accent: #e85d04;
  --accent-dark: #bd4500;
  --accent-soft: #fff2e9;
  --green: #197a55;
  --green-soft: #eaf7f1;
  --warning: #a84300;
  --warning-soft: #fff1e7;
  --code-bg: #171a1d;
  --code-text: #edf1f4;
  --sidebar-width: 284px;
  --toc-width: 208px;
  --topbar-height: 60px;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.72;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--topbar-height);
  display: grid;
  grid-template-columns: minmax(260px, var(--sidebar-width)) minmax(240px, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 0 22px 0 18px;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 5px rgba(20, 26, 30, 0.05);
}

.topbar-left,
.brand,
.brand-copy,
.reading-progress,
.continue-button,
.course-facts dt,
.notice,
.section-heading,
.outcome-list li,
.future-lesson,
.version-note,
.troubleshooting summary,
.complete-button,
.breadcrumbs {
  display: flex;
  align-items: center;
}

.topbar-left {
  min-width: 0;
  gap: 10px;
}

.brand {
  min-width: 0;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
}

.brand-mark svg {
  width: 20px;
  height: 20px;
}

.brand-copy {
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.brand-copy strong,
.brand-copy small {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-copy strong {
  font-size: 14px;
}

.brand-copy small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.reading-progress {
  justify-self: center;
  width: min(380px, 100%);
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
}

.progress-track,
.completion-track {
  height: 5px;
  overflow: hidden;
  background: #e7eaec;
  border-radius: 3px;
}

.progress-track {
  flex: 1;
}

.progress-track span,
.completion-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width 180ms ease;
}

.continue-button,
.complete-button {
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 650;
}

.continue-button {
  min-height: 36px;
  padding: 0 14px;
  background: var(--text);
  color: #fff;
}

.continue-button:hover {
  background: #343a3f;
}

.continue-button svg,
.complete-button svg,
.icon-button svg {
  width: 17px;
  height: 17px;
}

.icon-button {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--text);
  cursor: pointer;
}

.icon-button:hover {
  background: var(--surface-soft);
  border-color: var(--border);
}

.mobile-menu-button {
  display: none;
}

.page-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  min-height: 100vh;
  padding-top: var(--topbar-height);
}

.course-sidebar,
.page-toc {
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
}

.course-sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.course-summary {
  padding: 24px 22px 20px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 750;
}

.course-summary h2 {
  margin: 0 0 18px;
  font-size: 18px;
  line-height: 1.4;
}

.completion-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}

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

.lesson-nav {
  padding: 14px 12px 30px;
}

.nav-group-label {
  margin: 5px 10px 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.future-label {
  margin-top: 24px;
}

.lesson-row {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: center;
  gap: 4px;
  min-height: 43px;
  padding: 0 8px;
  border-left: 3px solid transparent;
}

.lesson-row.active {
  background: var(--accent-soft);
  border-left-color: var(--accent);
  border-radius: 0 5px 5px 0;
}

.lesson-check {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--green);
  cursor: pointer;
}

.lesson-row a {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 4px;
  color: #343a3f;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}

.lesson-row a span {
  min-width: 28px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
}

.future-lesson {
  min-height: 39px;
  gap: 9px;
  padding: 7px 10px;
  color: #8a9197;
  font-size: 12px;
}

.future-lesson svg {
  width: 16px;
  height: 16px;
}

.future-lesson span {
  min-width: 0;
  flex: 1;
}

.future-lesson small {
  font-size: 10px;
}

.content-area {
  min-width: 0;
  background: var(--surface);
}

.course-article {
  width: min(900px, calc(100% - 72px));
  margin: 0 auto;
  padding: 34px 0 96px;
}

.breadcrumbs {
  gap: 5px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 12px;
}

.breadcrumbs svg {
  width: 14px;
  height: 14px;
}

.lesson-section {
  padding: 28px 0 56px;
  border-bottom: 1px solid var(--border);
}

.intro-section {
  padding-top: 8px;
}

.lesson-section h1 {
  max-width: 720px;
  margin: 0;
  color: #171a1d;
  font-size: 38px;
  line-height: 1.23;
}

.lesson-section h2 {
  margin: 36px 0 14px;
  font-size: 24px;
  line-height: 1.35;
}

.lesson-section h3 {
  margin: 30px 0 12px;
  font-size: 18px;
  line-height: 1.4;
}

.lesson-section h4 {
  margin: 30px 0 10px;
  color: #242a2e;
  font-size: 15px;
  line-height: 1.45;
}

.lesson-section [id] {
  scroll-margin-top: 88px;
}

.lesson-section p {
  margin: 0 0 16px;
}

.lead {
  max-width: 760px;
  margin-top: 18px !important;
  color: #4f575d;
  font-size: 17px;
  line-height: 1.8;
}

.lesson-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 750;
}

.lesson-kicker span:last-child {
  padding-left: 8px;
  border-left: 1px solid #d7dadd;
  color: var(--muted);
}

.course-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 30px 0;
  border-block: 1px solid var(--border);
}

.course-facts div {
  min-width: 0;
  padding: 15px 16px;
  border-right: 1px solid var(--border);
}

.course-facts div:last-child {
  border-right: 0;
}

.course-facts dt {
  gap: 6px;
  color: var(--muted);
  font-size: 11px;
}

.course-facts dt svg {
  width: 14px;
  height: 14px;
}

.course-facts dd {
  margin: 5px 0 0;
  overflow-wrap: anywhere;
  font-size: 13px;
  font-weight: 700;
}

.notice {
  align-items: flex-start;
  gap: 12px;
  margin: 24px 0;
  padding: 14px 16px;
  border: 1px solid;
  border-radius: 6px;
}

.notice > svg {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  margin-top: 2px;
}

.notice strong {
  display: block;
  margin-bottom: 2px;
}

.notice p {
  margin: 0;
  font-size: 13px;
}

.note-notice {
  background: #eef6fa;
  border-color: #b7d7e7;
  color: #244b5d;
}

.warning-notice {
  background: var(--warning-soft);
  border-color: #efbc99;
  color: #78330a;
}

.outcome-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.outcome-list li {
  align-items: flex-start;
  gap: 9px;
}

.outcome-list svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  margin-top: 4px;
  color: var(--green);
}

.plain-checklist {
  display: grid;
  gap: 8px;
  margin: 12px 0 24px;
  padding: 0;
  list-style: none;
}

.plain-checklist li {
  position: relative;
  padding-left: 25px;
}

.plain-checklist li::before {
  content: "";
  position: absolute;
  top: 0.68em;
  left: 4px;
  width: 7px;
  height: 7px;
  background: var(--green);
  border-radius: 50%;
  transform: translateY(-50%);
}

.steps-list {
  display: grid;
  gap: 16px;
  margin: 16px 0 20px;
  padding: 0;
  list-style: none;
}

.steps-list.continued {
  margin-top: 20px;
}

.steps-list > li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: start;
  gap: 12px;
}

.steps-list > li > div {
  min-width: 0;
}

.steps-list p {
  margin: 4px 0 0;
  color: #51595f;
}

.step-number {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  border: 1px solid #efc6a6;
  border-radius: 50%;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
}

.detailed-steps {
  gap: 30px;
}

.learning-paths {
  margin: 16px 0 26px;
  border-block: 1px solid var(--border);
}

.learning-paths p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 0;
  padding: 13px 4px;
}

.learning-paths p + p {
  border-top: 1px solid var(--border);
}

.learning-paths strong {
  min-width: 110px;
}

.learning-paths span {
  color: #4e565c;
}

.learning-paths svg {
  width: 15px;
  height: 15px;
  color: var(--accent-dark);
}

.section-heading {
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 16px;
}

.section-heading h2 {
  margin: 0;
}

.difficulty {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.course-figure {
  margin: 26px 0 30px;
}

.course-figure img {
  width: 100%;
  max-height: 560px;
  display: block;
  object-fit: contain;
  background: #eef0f1;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.course-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

.wide-figure img {
  max-height: none;
}

.compact-figure {
  width: min(100%, 640px);
  margin: 18px 0 8px;
}

.compact-figure img {
  max-height: 440px;
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.figure-grid .course-figure {
  margin: 0;
}

.figure-grid img {
  height: 100%;
  min-height: 220px;
  max-height: 360px;
}

.table-wrap {
  width: 100%;
  margin: 18px 0 28px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

th {
  background: var(--surface-soft);
  color: #4d555b;
  font-weight: 700;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover td {
  background: #fafbfb;
}

.control-table td:first-child {
  width: 210px;
  background: #fafbfb;
  text-align: center;
}

.control-table img {
  width: auto;
  max-width: 180px;
  max-height: 58px;
  display: inline-block;
  object-fit: contain;
}

.record-table table {
  min-width: 820px;
}

.record-table tbody td:nth-child(n+3) {
  min-width: 110px;
  height: 48px;
  background: #fff;
}

.color-swatch {
  width: 11px;
  height: 11px;
  display: inline-block;
  margin-right: 7px;
  border-radius: 50%;
  vertical-align: -1px;
}

.color-swatch.red { background: #d9363e; }
.color-swatch.green { background: #1f8a5b; }
.color-swatch.blue { background: #2a6fdb; }

code {
  padding: 2px 5px;
  background: #eef0f2;
  border-radius: 3px;
  color: #293139;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.92em;
}

.code-block {
  margin: 14px 0 20px;
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid #2d3338;
  border-radius: 6px;
}

.code-toolbar {
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 14px;
  background: #22272b;
  border-bottom: 1px solid #343b40;
  color: #aeb7bd;
  font-size: 11px;
}

.copy-button {
  display: flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 0 8px;
  background: transparent;
  border: 1px solid #485158;
  border-radius: 4px;
  color: #dce2e6;
  cursor: pointer;
  font-size: 11px;
}

.copy-button:hover {
  background: #30373c;
}

.copy-button svg {
  width: 14px;
  height: 14px;
}

.code-block pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
}

.code-block pre code {
  padding: 0;
  background: transparent;
  color: var(--code-text);
  font-size: 13px;
  line-height: 1.65;
}

.content-disclosure {
  margin: 26px 0;
  overflow: hidden;
  border-block: 1px solid var(--border);
}

.content-disclosure > summary {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 4px;
  cursor: pointer;
  list-style: none;
}

.content-disclosure > summary::-webkit-details-marker {
  display: none;
}

.content-disclosure > summary > span {
  min-width: 0;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: center;
  flex: 1;
  column-gap: 10px;
}

.content-disclosure > summary > span > svg {
  grid-row: 1 / span 2;
  width: 20px;
  height: 20px;
  color: var(--accent-dark);
}

.content-disclosure > summary strong {
  font-size: 14px;
}

.content-disclosure > summary small {
  color: var(--muted);
  font-size: 11px;
}

.content-disclosure[open] > summary .summary-chevron {
  transform: rotate(180deg);
}

.disclosure-body {
  padding: 6px 4px 28px 36px;
}

.parameter-section {
  margin: 44px 0 38px;
  padding: 30px 0 26px;
  border-block: 1px solid var(--border);
}

.parameter-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 14px;
}

.parameter-heading h3 {
  margin: 7px 0 0;
  font-size: 23px;
}

.parameter-heading > span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.focus-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 800;
}

.focus-label svg {
  width: 15px;
  height: 15px;
}

.parameter-lead {
  margin: 0 0 22px !important;
  padding: 14px 16px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  color: #5e3214;
  font-size: 14px;
}

.parameter-overview table {
  min-width: 680px;
}

.parameter-step {
  margin: 12px 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.parameter-step > summary {
  min-height: 60px;
  padding: 0 14px;
}

.parameter-step .disclosure-body {
  padding: 8px 18px 24px 46px;
}

.parameter-step .disclosure-body > :first-child {
  margin-top: 4px;
}

.restore-step {
  border-color: #b9d9cc;
}

.restore-step > summary > span > svg {
  color: var(--green);
}

.visible-parameter-heading {
  margin-top: 34px !important;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.path-box {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 12px 0 22px;
  padding: 12px 14px;
  overflow-x: auto;
  background: var(--surface-soft);
  border-left: 3px solid var(--accent);
}

.path-box svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  color: var(--accent-dark);
}

.path-box code {
  white-space: nowrap;
}

.completion-standard {
  margin: 30px 0 22px;
  padding: 18px 20px 2px;
  background: var(--green-soft);
  border-left: 3px solid var(--green);
}

.completion-standard h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 10px;
  color: #145d42;
  font-size: 16px;
}

.completion-standard h3 svg {
  width: 19px;
  height: 19px;
}

.completion-standard .plain-checklist li::before {
  background: #145d42;
}

.result-callout,
.principle-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 20px 0 28px;
  padding: 13px 15px;
  background: var(--surface-soft);
  border-left: 3px solid var(--green);
}

.result-callout svg,
.principle-note svg {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--green);
}

.result-callout p,
.principle-note {
  margin-bottom: 0;
}

.troubleshooting {
  margin: 28px 0 18px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.troubleshooting summary {
  min-height: 48px;
  gap: 9px;
  padding: 0 14px;
  cursor: pointer;
  list-style: none;
}

.troubleshooting summary::-webkit-details-marker {
  display: none;
}

.troubleshooting summary > svg:first-child {
  width: 18px;
  height: 18px;
  color: var(--accent-dark);
}

.troubleshooting summary strong {
  flex: 1;
  font-size: 13px;
}

.summary-chevron {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}

.troubleshooting[open] .summary-chevron {
  transform: rotate(180deg);
}

.troubleshooting ul {
  margin: 0;
  padding: 0 42px 16px 54px;
  color: #50585e;
  font-size: 13px;
}

.complete-button {
  min-height: 40px;
  margin-top: 14px;
  padding: 0 14px;
  background: var(--green-soft);
  border: 1px solid #acd7c6;
  color: #145d42;
}

.complete-button:hover {
  background: #dff2e9;
}

.complete-button.completed {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.page-toc {
  padding: 30px 20px;
  background: var(--surface);
  border-left: 1px solid var(--border);
}

.page-toc > p {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 750;
}

.page-toc > a {
  display: block;
  padding: 6px 0 6px 10px;
  border-left: 2px solid var(--border);
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
}

.page-toc > a:hover,
.page-toc > a.active {
  border-left-color: var(--accent);
  color: var(--accent-dark);
}

.page-toc > a.toc-child {
  padding-left: 22px;
  font-size: 11px;
}

.version-note {
  align-items: flex-start;
  gap: 8px;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.version-note svg {
  width: 15px;
  height: 15px;
  margin-top: 2px;
}

.sidebar-backdrop {
  display: none;
}

@media (max-width: 1180px) {
  .page-shell {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .page-toc {
    display: none;
  }

  .topbar {
    grid-template-columns: 260px minmax(220px, 1fr) auto;
  }
}

@media (max-width: 820px) {
  :root {
    --topbar-height: 56px;
  }

  .topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 0 12px 0 8px;
  }

  .mobile-menu-button {
    display: grid;
  }

  .brand-copy small,
  .reading-progress {
    display: none;
  }

  .continue-button {
    padding: 0 11px;
    font-size: 12px;
  }

  .page-shell {
    display: block;
  }

  .course-sidebar {
    position: fixed;
    z-index: 60;
    top: var(--topbar-height);
    bottom: 0;
    left: 0;
    width: min(300px, 88vw);
    height: auto;
    transform: translateX(-102%);
    transition: transform 180ms ease;
    box-shadow: 8px 0 24px rgba(20, 26, 30, 0.18);
  }

  .course-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    z-index: 55;
    inset: var(--topbar-height) 0 0;
    background: rgba(24, 29, 33, 0.42);
  }

  .sidebar-backdrop.show {
    display: block;
  }

  .course-article {
    width: min(100% - 32px, 760px);
    padding-top: 22px;
  }

  .breadcrumbs {
    margin-bottom: 20px;
  }

  .lesson-section h1 {
    font-size: 30px;
  }

  .lead {
    font-size: 15px;
  }

  .course-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-facts div:nth-child(2) {
    border-right: 0;
  }

  .course-facts div:nth-child(-n+2) {
    border-bottom: 1px solid var(--border);
  }

  .outcome-list {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

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

  .figure-grid img {
    min-height: 0;
  }

  .disclosure-body {
    padding-left: 4px;
  }

  .parameter-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .parameter-step .disclosure-body {
    padding: 8px 14px 22px;
  }
}

@media (max-width: 520px) {
  .brand-mark {
    width: 30px;
    height: 30px;
  }

  .brand-copy strong {
    font-size: 12px;
  }

  .continue-button span {
    display: none;
  }

  .course-article {
    width: calc(100% - 24px);
  }

  .lesson-section {
    padding-bottom: 44px;
  }

  .lesson-section h1 {
    font-size: 27px;
  }

  .lesson-section h2 {
    font-size: 21px;
  }

  .course-facts {
    grid-template-columns: 1fr;
  }

  .course-facts div,
  .course-facts div:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .course-facts div:last-child {
    border-bottom: 0;
  }

  .notice {
    padding: 12px;
  }

  .steps-list > li {
    grid-template-columns: 27px minmax(0, 1fr);
    gap: 9px;
  }

  .step-number {
    width: 25px;
    height: 25px;
  }

  .learning-paths p {
    align-items: flex-start;
  }

  .learning-paths strong {
    width: 100%;
  }

  .content-disclosure > summary {
    min-height: 60px;
  }

  .content-disclosure > summary small {
    display: none;
  }

  .parameter-section {
    margin-top: 36px;
    padding-top: 24px;
  }

  .parameter-heading h3 {
    font-size: 20px;
  }

  .parameter-lead {
    padding: 12px;
  }

  .control-table td:first-child {
    width: 145px;
  }

  .control-table img {
    max-width: 130px;
  }

  .completion-standard {
    padding-inline: 14px;
  }

  th,
  td {
    padding: 10px 11px;
    font-size: 12px;
  }

  .copy-button span {
    display: none;
  }

  .troubleshooting ul {
    padding-left: 36px;
  }
}

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

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