:root {
  color-scheme: dark;
  --bg: #070a10;
  --panel: rgba(12, 18, 29, 0.72);
  --panel-strong: rgba(8, 12, 20, 0.88);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f7f9ff;
  --muted: #a8b2c4;
  --blue: #62d5ff;
  --green: #8cffc1;
  --orange: #ffb55f;
  --red: #ff5d73;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 78% 20%, rgba(98, 213, 255, 0.18), transparent 28rem),
    radial-gradient(circle at 18% 78%, rgba(255, 181, 95, 0.16), transparent 26rem),
    linear-gradient(135deg, #070a10 0%, #111827 54%, #070a10 100%);
  color: var(--text);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
}

a {
  color: inherit;
}

.text-link {
  color: var(--green);
  font-weight: 900;
  text-decoration: none;
}

.text-link:hover {
  color: var(--blue);
}

.shell {
  position: relative;
  width: min(1120px, calc(100% - 44px));
  margin: 0 auto;
}

.course-shell {
  position: relative;
  width: min(1480px, calc(100% - 44px));
  margin: 0 auto;
}

.topbar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 42px 0 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(98, 213, 255, 0.22), rgba(255, 181, 95, 0.18));
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.38);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: #d6deec;
  font-size: 14px;
  font-weight: 800;
}

.nav a {
  position: relative;
  text-decoration: none;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
  transition: transform 180ms ease;
}

.nav a:hover::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 42px;
  align-items: center;
  min-height: calc(100vh - 86px);
  padding: 76px 0 72px;
}

.hero--lesson {
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  min-height: auto;
  padding-top: 92px;
}

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 42px;
  align-items: center;
  padding: 82px 0 56px;
}

.course-hero > *,
.course-layout > * {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lesson-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.lesson-meta-row .eyebrow {
  margin: 0;
}

.difficulty-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 0 11px;
  background: rgba(255, 255, 255, 0.07);
  color: #edf4ff;
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.difficulty-badge--basic {
  border-color: rgba(140, 255, 193, 0.32);
  background: rgba(140, 255, 193, 0.1);
  color: #aefbd1;
}

.difficulty-badge--intermediate {
  border-color: rgba(98, 213, 255, 0.32);
  background: rgba(98, 213, 255, 0.1);
  color: #a9eaff;
}

.difficulty-badge--advanced {
  border-color: rgba(255, 181, 95, 0.36);
  background: rgba(255, 181, 95, 0.1);
  color: #ffd69d;
}

.difficulty-badge--production {
  border-color: rgba(255, 93, 115, 0.36);
  background: rgba(255, 93, 115, 0.1);
  color: #ffb3bf;
}

.course-badge {
  width: 112px;
  margin: 0 0 20px;
}

.course-badge img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 22px 44px rgba(0, 0, 0, 0.36));
}

.course-badge--hero {
  width: 118px;
}

.course-badge--small {
  width: 88px;
  margin-bottom: 16px;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(48px, 7vw, 104px);
  line-height: 0.92;
  letter-spacing: 0;
}

.lesson-title {
  font-size: clamp(42px, 5.8vw, 82px);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

p {
  margin: 0;
}

.gradient {
  background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  border: 1px solid rgba(140, 255, 193, 0.28);
  border-radius: 999px;
  padding: 9px 13px;
  background: rgba(140, 255, 193, 0.08);
  color: #dfffee;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 24px rgba(140, 255, 193, 0.8);
}

.lead {
  max-width: 700px;
  margin-top: 28px;
  color: #d6deec;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.65;
}

.build-note {
  max-width: 680px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.chips span,
.pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.06);
  color: #e8edf7;
  font-size: 14px;
  font-weight: 800;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-weight: 900;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.13);
}

.button--primary {
  color: #061018;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.terminal {
  max-width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(8, 12, 20, 0.82);
  box-shadow: 0 26px 90px rgba(0, 0, 0, 0.44);
  overflow: hidden;
}

.code-lab {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.08), transparent 34%),
    rgba(5, 9, 16, 0.9);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.36);
  overflow: hidden;
}

.code-lab__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.code-lab__header .eyebrow {
  margin-bottom: 8px;
}

.code-lab__header h3 {
  margin: 0;
}

.code-lab__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.code-lab__actions .button {
  min-height: 40px;
  border: 0;
  cursor: pointer;
}

.code-lab__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.editor-panel {
  display: grid;
  min-width: 0;
  border-right: 1px solid var(--line);
}

.editor-panel:last-child {
  border-right: 0;
}

.editor-panel span,
.preview-panel__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #d6deec;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.editor-panel textarea {
  width: 100%;
  min-height: 360px;
  border: 0;
  outline: 0;
  resize: vertical;
  padding: 18px;
  background: rgba(5, 8, 14, 0.78);
  color: #d8e3f5;
  font: 14px/1.65 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.editor-panel textarea:focus {
  background: rgba(8, 14, 24, 0.98);
  box-shadow: inset 0 0 0 1px rgba(140, 255, 193, 0.32);
}

.preview-panel {
  background: rgba(255, 255, 255, 0.03);
}

.preview-panel__bar small {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.preview-panel iframe {
  display: block;
  width: 100%;
  min-height: 430px;
  border: 0;
  background: white;
}

.terminal-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28c840; }

pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 0;
  padding: 26px;
  color: #d8e3f5;
  font: 15px/1.75 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: pre-wrap;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.blue { color: var(--blue); }
.green { color: var(--green); }
.orange { color: var(--orange); }
.red { color: var(--red); }
.muted { color: #7d8798; }

.band {
  position: relative;
  padding: 92px 0;
}

.band--light {
  background: rgba(255, 255, 255, 0.035);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head--wide {
  max-width: 980px;
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.lesson-index {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.lesson-index--home {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-index--home .card h3 {
  font-size: clamp(20px, 1.42vw, 22px);
  line-height: 1.08;
  white-space: nowrap;
}

.card {
  position: relative;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  background: rgba(8, 12, 20, 0.64);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.28);
}

.course-card-badge {
  display: block;
  width: 68px;
  height: 68px;
  margin: 0 0 14px;
  object-fit: contain;
  filter: drop-shadow(0 16px 28px rgba(0, 0, 0, 0.32));
}

.card p,
.article p,
.article li {
  color: #d6deec;
  line-height: 1.75;
}

.card a {
  display: inline-flex;
  margin-top: 18px;
  color: var(--green);
  font-weight: 900;
  text-decoration: none;
}

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

.lesson-index .pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  transform: translateY(-5px);
  border-color: rgba(140, 255, 193, 0.28);
  padding: 5px 8px;
  background: rgba(140, 255, 193, 0.09);
  color: #9ff7c5;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.lesson-index--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.28fr);
  gap: 34px;
  align-items: start;
}

.article {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(24px, 4vw, 42px);
  background: rgba(8, 12, 20, 0.7);
}

.article section + section {
  margin-top: 42px;
  padding-top: 42px;
  border-top: 1px solid var(--line);
}

.article ul {
  margin: 16px 0 0;
  padding-left: 22px;
}

.lesson-wide {
  display: grid;
  gap: 54px;
}

.course-layout {
  display: grid;
  grid-template-columns: 278px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 24px 0 96px;
}

.course-nav {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: rgba(8, 12, 20, 0.82);
  overflow: auto;
}

.course-nav p {
  margin: 18px 0 10px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.course-nav p:first-child {
  margin-top: 0;
}

.course-nav a {
  display: block;
  border-radius: 10px;
  padding: 9px 10px;
  color: #d6deec;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.course-nav a:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--green);
}

.course-nav a.is-active {
  background:
    linear-gradient(90deg, rgba(140, 255, 193, 0.18), rgba(98, 213, 255, 0.08));
  color: var(--green);
  box-shadow: inset 3px 0 0 var(--green);
}

.course-nav__group {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px 0;
}

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

.course-nav__group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  margin: 0 0 8px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.course-nav__group > summary::-webkit-details-marker {
  display: none;
}

.course-nav__toggle::before {
  content: "+";
  color: var(--orange);
}

.course-nav__group[open] > summary .course-nav__toggle::before,
.course-nav__subtree-toggle[aria-expanded="true"] .course-nav__toggle::before {
  content: "-";
}

.course-nav__subtree {
  margin: 2px 0;
}

.course-nav__subtree-toggle {
  appearance: none;
  width: 100%;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-radius: 10px;
  margin: 0;
  padding: 9px 10px;
  background: transparent;
  color: #d6deec;
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
  font-family: inherit;
  letter-spacing: 0;
  text-transform: none;
  text-align: left;
}

.course-nav__subtree-toggle:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--green);
}

.course-nav__subtree-toggle.is-active {
  background:
    linear-gradient(90deg, rgba(140, 255, 193, 0.18), rgba(98, 213, 255, 0.08));
  color: var(--green);
  box-shadow: inset 3px 0 0 var(--green);
}

.course-nav__subtree.has-active-child .course-nav__subtree-toggle {
  color: var(--green);
}

.course-nav__subtree-links {
  display: grid;
  gap: 2px;
  margin: 4px 0 6px 10px;
  padding-left: 10px;
  border-left: 1px solid rgba(140, 255, 193, 0.22);
}

.course-nav__subtree-links a {
  padding: 8px 10px;
  color: #bdc8da;
  font-size: 13px;
  font-weight: 800;
}

.course-nav__subtree-links[hidden] {
  display: none;
}

.course-content {
  display: grid;
  min-width: 0;
  gap: 20px;
}

.course-section {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(24px, 4vw, 42px);
  background: rgba(8, 12, 20, 0.68);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

.course-section--placeholder {
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.07), transparent 38%),
    rgba(8, 12, 20, 0.5);
}

.course-section--placeholder::after {
  content: "Chapter shell ready";
  display: inline-flex;
  margin-top: 18px;
  border: 1px solid rgba(255, 181, 95, 0.32);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.course-section h2 {
  max-width: 900px;
}

.course-section p:not(.eyebrow) {
  max-width: 980px;
  color: #d6deec;
  font-size: 17px;
  line-height: 1.75;
}

.course-note {
  margin-top: 18px;
  border: 1px solid rgba(140, 255, 193, 0.24);
  border-radius: 16px;
  padding: 16px 18px;
  background: rgba(140, 255, 193, 0.08);
  color: #dfffee;
  line-height: 1.65;
}

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

.decision-card,
.download-card {
  min-height: 148px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.08), transparent 46%),
    rgba(255, 255, 255, 0.045);
}

.decision-card h3 {
  color: #ffffff;
}

.decision-card p,
.download-card p {
  color: #d6deec;
  line-height: 1.65;
}

.download-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  color: inherit;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.download-card::after {
  content: "Download";
  align-self: flex-start;
  border: 1px solid rgba(140, 255, 193, 0.28);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.download-card:hover {
  transform: translateY(-2px);
  border-color: rgba(140, 255, 193, 0.32);
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.09), transparent 46%),
    rgba(255, 255, 255, 0.06);
}

.download-card span {
  color: #ffffff;
  font-size: 20px;
  font-weight: 1000;
}

.self-check-section {
  background:
    radial-gradient(circle at 92% 0%, rgba(140, 255, 193, 0.12), transparent 30%),
    linear-gradient(135deg, rgba(98, 213, 255, 0.05), rgba(8, 12, 20, 0.76));
}

.self-check-section__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.self-check-section__head .eyebrow {
  margin-bottom: 14px;
}

.self-check-section__head h2 {
  margin-bottom: 0;
}

.self-check-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: self-check;
}

.self-check-list li {
  position: relative;
  min-height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 13px 16px 13px 54px;
  background: rgba(255, 255, 255, 0.045);
  color: #d6deec;
  line-height: 1.6;
  counter-increment: self-check;
}

.self-check-list li::before {
  content: counter(self-check, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 1000;
  letter-spacing: 0.08em;
}

.document-anatomy {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.anatomy-node {
  position: relative;
  min-height: 230px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  background:
    radial-gradient(circle at 20% 0%, rgba(98, 213, 255, 0.12), transparent 40%),
    rgba(5, 9, 16, 0.72);
  overflow: hidden;
}

.anatomy-node::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -44px;
  width: 120px;
  height: 120px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.anatomy-node span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: #061018;
  font-weight: 1000;
}

.anatomy-node strong {
  display: block;
  margin-bottom: 12px;
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 18px;
}

.anatomy-node p {
  color: #d6deec;
  line-height: 1.7;
}

.anatomy-node--doctype span {
  background: linear-gradient(135deg, var(--orange), var(--red));
}

.anatomy-node--head span {
  background: linear-gradient(135deg, var(--blue), #9f8cff);
}

.anatomy-node--body span {
  background: linear-gradient(135deg, var(--green), var(--orange));
}

.tag-anatomy {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px;
  background: rgba(5, 9, 16, 0.7);
}

.tag-anatomy div {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.tag-anatomy span {
  display: block;
  margin-bottom: 12px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.tag-anatomy code {
  color: #ffffff;
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 900;
}

.syntax-anatomy {
  margin: 28px 0;
  border: 1px solid rgba(140, 255, 193, 0.2);
  border-radius: 24px;
  padding: clamp(18px, 3vw, 28px);
  background:
    radial-gradient(circle at 18% 0%, rgba(98, 213, 255, 0.12), transparent 36%),
    linear-gradient(135deg, rgba(140, 255, 193, 0.07), rgba(8, 12, 20, 0.82));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
}

.syntax-anatomy__code {
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: clamp(18px, 3vw, 28px);
  background: rgba(3, 7, 13, 0.82);
}

.syntax-anatomy__code code {
  display: block;
  color: #ffffff;
  font-size: clamp(22px, 3vw, 42px);
  font-weight: 900;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.syntax-anatomy__code span {
  color: #b8c4d6;
}

.syntax-anatomy__code mark {
  border-radius: 8px;
  padding: 0 0.18em;
  background: rgba(98, 213, 255, 0.18);
  color: var(--blue);
}

.syntax-anatomy__code strong {
  color: var(--green);
}

.syntax-anatomy__parts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.syntax-anatomy__parts article {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.syntax-anatomy__parts article > span {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.syntax-anatomy__parts strong {
  display: block;
  margin-bottom: 10px;
  color: #ffffff;
}

.syntax-anatomy__parts p {
  color: #d6deec;
  font-size: 15px;
  line-height: 1.65;
}

.syntax-anatomy__full {
  grid-column: span 2;
}

.file-tree-card {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 1fr);
  gap: 22px;
  align-items: stretch;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  background:
    radial-gradient(circle at 14% 0%, rgba(140, 255, 193, 0.13), transparent 34%),
    rgba(5, 9, 16, 0.72);
}

.file-tree-card h3 {
  margin-top: 18px;
  font-size: clamp(28px, 3vw, 44px);
}

.file-tree-card pre {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.28);
}

.browser-pipeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.browser-pipeline article {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.1), transparent 42%),
    rgba(5, 9, 16, 0.7);
}

.browser-pipeline article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -15px;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.browser-pipeline span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 1000;
  letter-spacing: 0.14em;
}

.browser-pipeline p {
  color: #d6deec;
  line-height: 1.7;
}

.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-strip a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 15px;
  background: rgba(255, 255, 255, 0.06);
  color: #d6deec;
  font-size: 13px;
  font-weight: 900;
  text-decoration: none;
}

.topic-strip a:hover {
  border-color: rgba(140, 255, 193, 0.48);
  color: var(--green);
}

.lesson-block {
  display: grid;
  gap: 24px;
}

.lesson-block + .lesson-block {
  padding-top: 54px;
  border-top: 1px solid var(--line);
}

.lesson-copy {
  max-width: 980px;
}

.lesson-copy p:not(.eyebrow) {
  color: #d6deec;
  font-size: 18px;
  line-height: 1.75;
}

.structure-grid,
.reference-grid,
.do-dont-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.structure-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.mini-card,
.element-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  background: rgba(8, 12, 20, 0.68);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.24);
}

.mini-card h3,
.element-card h3 {
  margin-bottom: 10px;
}

.mini-card p,
.mini-card li,
.element-card p {
  color: #d6deec;
  line-height: 1.7;
}

.mini-card a {
  display: inline-flex;
  margin-top: 16px;
  color: var(--green);
  font-weight: 900;
  text-decoration: none;
}

.production-links .reference-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mini-card ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.mini-card--good {
  background: linear-gradient(135deg, rgba(140, 255, 193, 0.1), rgba(8, 12, 20, 0.72));
}

.mini-card--warn {
  background: linear-gradient(135deg, rgba(255, 93, 115, 0.1), rgba(8, 12, 20, 0.72));
}

.element-map {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.element-map--compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 22px;
}

.element-card span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.element-card code,
.mini-card code {
  color: var(--green);
}

.element-card--link {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.element-card--link:hover {
  transform: translateY(-3px);
  border-color: rgba(140, 255, 193, 0.42);
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.1), transparent 42%),
    rgba(8, 12, 20, 0.78);
}

.element-card--link[href="#"] {
  cursor: default;
}

.element-card--link[href="#"]:hover {
  transform: none;
}

.editor-showcase {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.editor-card {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at 16% 0%, rgba(98, 213, 255, 0.16), transparent 32%),
    rgba(8, 12, 20, 0.72);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.26);
}

.editor-card--jetbrains {
  background:
    radial-gradient(circle at 16% 0%, rgba(255, 109, 94, 0.18), transparent 32%),
    rgba(8, 12, 20, 0.72);
}

.editor-card--sublime {
  background:
    radial-gradient(circle at 16% 0%, rgba(255, 184, 107, 0.18), transparent 32%),
    rgba(8, 12, 20, 0.72);
}

.editor-card--vim {
  background:
    radial-gradient(circle at 16% 0%, rgba(140, 255, 193, 0.16), transparent 32%),
    rgba(8, 12, 20, 0.72);
}

.editor-card h3 {
  margin: 12px 0 10px;
  font-size: clamp(24px, 3vw, 36px);
}

.editor-card p {
  color: #d6deec;
  line-height: 1.7;
}

.editor-card__visual {
  min-height: 230px;
}

.editor-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: #0b1220;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 22px 60px rgba(0, 0, 0, 0.24);
}

.editor-media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
  object-position: center;
}

.editor-card--vscode .editor-media img {
  object-position: center top;
}

.editor-card--jetbrains .editor-media img {
  object-position: center;
}

.editor-card--sublime .editor-media img {
  object-position: center top;
}

.editor-card--vim .editor-media img {
  object-position: center;
}

.editor-media figcaption {
  position: absolute;
  right: 12px;
  bottom: 12px;
  left: 12px;
  width: fit-content;
  max-width: calc(100% - 24px);
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(8, 12, 20, 0.78);
  color: rgba(255, 255, 255, 0.78);
  font-size: 11px;
  font-weight: 800;
  line-height: 1.2;
  backdrop-filter: blur(10px);
}

.editor-media img.editor-media__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 112px;
  height: auto;
  min-height: 0;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  background: rgba(8, 12, 20, 0.78);
  object-fit: contain;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
}

.text-link {
  position: relative;
  display: inline-flex;
  width: fit-content;
  margin-top: 10px;
  color: #ffffff;
  font-weight: 900;
  text-decoration: none;
}

.text-link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -4px;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--green), var(--blue), var(--red));
  transform: scaleX(0.38);
  transform-origin: left;
  transition: transform 180ms ease;
}

.text-link:hover::after {
  transform: scaleX(1);
}

.link-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
}

.lesson-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: center;
}

.lesson-pagination .button:last-child {
  justify-self: end;
}

.element-lessons {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.element-lesson {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(360px, 1.14fr);
  gap: 22px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.06), transparent 36%),
    rgba(5, 9, 16, 0.56);
}

.element-lesson .lesson-copy {
  max-width: none;
}

.element-lesson .lesson-copy h3 {
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1.04;
}

.element-lesson .terminal {
  min-width: 0;
}

.element-lesson pre {
  font-size: 13px;
  line-height: 1.65;
}

.course-section.element-lesson {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  border-radius: 22px;
  padding: clamp(24px, 4vw, 42px);
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.045), transparent 34%),
    rgba(8, 12, 20, 0.68);
}

.course-section.element-lesson .reference-grid,
.course-section.element-lesson .do-dont-grid {
  margin-top: 24px;
}

.course-section.element-lesson .reference-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: 100%;
  max-width: 100%;
}

.course-section.element-lesson .terminal {
  margin-top: 22px;
}

.course-section.element-lesson .mini-card pre {
  margin-top: 14px;
  border-radius: 14px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.22);
}

.mini-card--why {
  border-color: rgba(98, 213, 255, 0.24);
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.1), rgba(8, 12, 20, 0.72));
}

.mini-task-panel {
  margin: 22px 0 18px;
  border: 1px solid rgba(98, 213, 255, 0.28);
  border-radius: 20px;
  padding: 20px 22px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.11), rgba(8, 12, 20, 0.78));
}

.mini-task-panel .eyebrow {
  color: var(--blue);
}

.mini-task-panel h3 {
  margin-bottom: 12px;
}

.mini-task-panel ul {
  margin: 0;
  padding-left: 22px;
}

.mini-task-panel li {
  color: #d6deec;
  line-height: 1.7;
}

.mini-task-panel li + li {
  margin-top: 6px;
}

.practice-panel {
  margin: 22px 0 24px;
  border: 1px solid rgba(255, 199, 107, 0.26);
  border-radius: 20px;
  padding: 20px 22px;
  background:
    linear-gradient(135deg, rgba(255, 199, 107, 0.11), rgba(8, 12, 20, 0.78));
}

.practice-panel .eyebrow {
  color: var(--orange);
}

.practice-panel h3 {
  margin-bottom: 12px;
}

.practice-panel ol {
  margin: 0;
  padding-left: 22px;
}

.practice-panel li {
  color: #d6deec;
  line-height: 1.7;
}

.practice-panel li + li {
  margin-top: 6px;
}

.css-audit-note {
  border-color: rgba(255, 199, 107, 0.24);
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 199, 107, 0.13), transparent 38%),
    linear-gradient(135deg, rgba(255, 199, 107, 0.055), rgba(8, 12, 20, 0.74));
}

.javascript-audit-note,
.javascript-route-map {
  border-color: rgba(247, 223, 30, 0.24);
  background:
    radial-gradient(circle at 12% 0%, rgba(247, 223, 30, 0.12), transparent 38%),
    linear-gradient(135deg, rgba(247, 223, 30, 0.05), rgba(8, 12, 20, 0.76));
}

.css-chapter-project {
  border-color: rgba(140, 255, 193, 0.28);
  background:
    radial-gradient(circle at 88% 0%, rgba(140, 255, 193, 0.14), transparent 36%),
    linear-gradient(135deg, rgba(98, 213, 255, 0.05), rgba(8, 12, 20, 0.78));
}

.javascript-chapter-checkpoint {
  border-color: rgba(140, 255, 193, 0.28);
  background:
    radial-gradient(circle at 88% 0%, rgba(140, 255, 193, 0.14), transparent 36%),
    linear-gradient(135deg, rgba(98, 213, 255, 0.05), rgba(8, 12, 20, 0.78));
}

.css-audit-toolkit .card {
  min-height: 250px;
}

.audit-code {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid rgba(255, 199, 107, 0.2);
  border-radius: 18px;
  padding: 18px;
  background: rgba(3, 7, 13, 0.78);
  color: #fff7df;
  font-size: 13px;
  line-height: 1.65;
}

.css-chapter-project .mini-card ul,
.javascript-audit-note .mini-card ul,
.javascript-chapter-checkpoint .mini-card ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.css-chapter-project .mini-card li,
.javascript-audit-note .mini-card li,
.javascript-chapter-checkpoint .mini-card li {
  color: #d6deec;
  line-height: 1.65;
}

.css-chapter-project .mini-card li + li,
.javascript-audit-note .mini-card li + li,
.javascript-chapter-checkpoint .mini-card li + li {
  margin-top: 6px;
}

.javascript-group-checkpoint {
  margin: 22px 0;
}

.code-lab--wide .code-lab__grid {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.code-lab--wide .preview-panel iframe {
  min-height: 520px;
}

.element-lesson .code-lab--wide .preview-panel iframe {
  min-height: 420px;
}

.css-lesson .reference-grid--wide {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.css-rule-anatomy,
.css-selector-visual,
.css-comment-visual,
.devtools-visual {
  margin-top: 28px;
}

.css-rule-anatomy {
  border: 1px solid rgba(140, 255, 193, 0.22);
  border-radius: 24px;
  padding: clamp(18px, 3vw, 28px);
  background:
    radial-gradient(circle at 18% 0%, rgba(98, 213, 255, 0.12), transparent 36%),
    linear-gradient(135deg, rgba(140, 255, 193, 0.07), rgba(8, 12, 20, 0.82));
}

.css-rule-anatomy__code {
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
  padding: clamp(18px, 3vw, 28px);
  background: rgba(3, 7, 13, 0.84);
}

.css-rule-anatomy__code code,
.css-selector-visual__selector code {
  display: block;
  color: #ffffff;
  font-size: clamp(22px, 3vw, 40px);
  font-weight: 1000;
  line-height: 1.18;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.css-comment-visual,
.css-connection-visual,
.css-selector-visual__steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.css-comment-visual article,
.css-connection-visual article,
.css-selector-visual__steps article {
  position: relative;
  min-height: 142px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.09), transparent 44%),
    rgba(5, 9, 16, 0.72);
}

.css-comment-visual article:not(:last-child)::after,
.css-connection-visual article:not(:last-child)::after,
.css-selector-visual__steps article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -15px;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.css-comment-visual span,
.css-connection-visual span,
.css-selector-visual__steps span,
.devtools-visual span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 1000;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.css-comment-visual p,
.css-connection-visual p,
.css-selector-visual__steps p {
  color: #d6deec;
  line-height: 1.7;
}

.css-comment-visual + pre {
  margin-top: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  background: rgba(3, 7, 13, 0.76);
}

.css-selector-visual {
  border: 1px solid rgba(98, 213, 255, 0.2);
  border-radius: 24px;
  padding: clamp(18px, 3vw, 28px);
  background:
    radial-gradient(circle at 82% 0%, rgba(255, 181, 95, 0.12), transparent 32%),
    rgba(5, 9, 16, 0.76);
}

.css-selector-visual__selector {
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
  padding: clamp(18px, 3vw, 28px);
  background: rgba(3, 7, 13, 0.82);
}

.devtools-visual {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr) minmax(260px, 0.76fr);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  background: rgba(4, 8, 14, 0.86);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.32);
}

.devtools-visual > div {
  min-width: 0;
  padding: 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.devtools-visual > div:last-child {
  border-right: 0;
}

.devtools-visual pre {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.22);
  font-size: 13px;
}

.devtools-visual ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.devtools-visual li {
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.045);
  color: #d6deec;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
}

.css-control-stack,
.css-inheritance-tree {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-control-stack {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.css-control-stack--specificity-meter,
.css-control-stack--layer-stack,
.css-control-stack--variable-flow,
.css-inheritance-tree {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-control-stack article,
.css-inheritance-tree article {
  position: relative;
  min-height: 166px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  background:
    radial-gradient(circle at 20% 0%, rgba(98, 213, 255, 0.12), transparent 38%),
    rgba(5, 9, 16, 0.74);
  overflow: hidden;
}

.css-control-stack article::before,
.css-inheritance-tree article::before {
  content: "";
  position: absolute;
  right: -38px;
  bottom: -38px;
  width: 112px;
  height: 112px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.css-control-stack article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -15px;
  z-index: 1;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--green));
}

.css-control-stack--layer-stack article:not(:last-child)::after,
.css-control-stack--variable-flow article:not(:last-child)::after {
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.css-control-stack span,
.css-inheritance-tree span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 16px;
  border: 1px solid rgba(140, 255, 193, 0.26);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-control-stack h3 {
  position: relative;
  z-index: 1;
  font-size: 20px;
}

.css-control-stack p,
.css-inheritance-tree p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-control-stack--specificity-meter article:nth-child(1) span {
  border-color: rgba(140, 255, 193, 0.28);
  color: var(--green);
}

.css-control-stack--specificity-meter article:nth-child(2) span {
  border-color: rgba(98, 213, 255, 0.3);
  color: var(--blue);
}

.css-control-stack--specificity-meter article:nth-child(3) span {
  border-color: rgba(255, 181, 95, 0.34);
  color: var(--orange);
}

.css-control-stack--specificity-meter article:nth-child(4) span {
  border-color: rgba(255, 93, 115, 0.34);
  color: var(--red);
}

.css-inheritance-tree {
  position: relative;
}

.css-inheritance-tree article {
  min-height: 132px;
}

.css-inheritance-tree article:nth-child(2),
.css-inheritance-tree article:nth-child(3),
.css-inheritance-tree article:nth-child(4) {
  margin-top: 32px;
}

.css-inheritance-tree article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -15px;
  z-index: 1;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue));
}

.css-box-anatomy,
.css-box-flow {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-box-anatomy {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(255, 181, 95, 0.12), transparent 34%),
    rgba(5, 9, 16, 0.72);
}

.css-box-anatomy article,
.css-box-flow article {
  position: relative;
  min-height: 150px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.045);
  overflow: hidden;
}

.css-box-anatomy article:nth-child(1) {
  background: rgba(255, 181, 95, 0.1);
}

.css-box-anatomy article:nth-child(2) {
  background: rgba(255, 93, 115, 0.09);
}

.css-box-anatomy article:nth-child(3) {
  background: rgba(98, 213, 255, 0.1);
}

.css-box-anatomy article:nth-child(4) {
  background: rgba(140, 255, 193, 0.1);
}

.css-box-anatomy article::before,
.css-box-flow article::before {
  content: "";
  position: absolute;
  right: -42px;
  bottom: -42px;
  width: 128px;
  height: 128px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.css-box-anatomy h3,
.css-box-flow span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(140, 255, 193, 0.26);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-box-anatomy p,
.css-box-flow p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-box-flow {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.css-box-flow--sizing-compare {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.css-box-flow--display-map {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-box-flow--dimension-gauge article {
  min-height: 132px;
}

.css-box-flow--dimension-gauge article:nth-child(1) span {
  color: var(--green);
}

.css-box-flow--dimension-gauge article:nth-child(2) span {
  color: var(--blue);
}

.css-box-flow--dimension-gauge article:nth-child(3) span {
  color: var(--orange);
}

.css-box-flow--overflow-panel article:nth-child(2) {
  border-color: rgba(255, 181, 95, 0.26);
  background: rgba(255, 181, 95, 0.08);
}

.css-box-flow--overflow-panel article:nth-child(3) {
  border-color: rgba(140, 255, 193, 0.22);
  background: rgba(140, 255, 193, 0.07);
}

.css-box-flow--display-map article:nth-child(1) span {
  color: var(--green);
}

.css-box-flow--display-map article:nth-child(2) span {
  color: var(--blue);
}

.css-box-flow--display-map article:nth-child(3) span {
  color: var(--orange);
}

.css-box-flow--display-map article:nth-child(4) span {
  color: var(--red);
}

.css-style-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.css-style-board--type-scale,
.css-style-board--palette,
.css-style-board--surface-layers,
.css-style-board--radius-scale {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-style-board article {
  position: relative;
  min-height: 156px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at 20% 0%, rgba(98, 213, 255, 0.12), transparent 38%),
    rgba(5, 9, 16, 0.74);
  overflow: hidden;
}

.css-style-board article::before {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -44px;
  width: 132px;
  height: 132px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.css-style-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(140, 255, 193, 0.26);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-style-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.05;
}

.css-style-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-style-board--font-stack article:nth-child(1) h3 {
  font-family: Inter, system-ui, sans-serif;
}

.css-style-board--font-stack article:nth-child(2) h3 {
  font-family: system-ui, sans-serif;
}

.css-style-board--font-stack article:nth-child(3) h3 {
  font-family: sans-serif;
}

.css-style-board--type-scale article:nth-child(1) h3 {
  font-size: 15px;
}

.css-style-board--type-scale article:nth-child(2) h3 {
  font-size: 18px;
}

.css-style-board--type-scale article:nth-child(3) h3 {
  font-size: 26px;
}

.css-style-board--type-scale article:nth-child(4) h3 {
  font-size: clamp(34px, 4vw, 56px);
}

.css-style-board--line-rhythm article:nth-child(1) p {
  line-height: 1.05;
}

.css-style-board--line-rhythm article:nth-child(2) p {
  line-height: 1.35;
}

.css-style-board--line-rhythm article:nth-child(3) p {
  line-height: 1.65;
}

.css-style-board--alignment-grid article:nth-child(1) {
  text-align: start;
}

.css-style-board--alignment-grid article:nth-child(2) {
  text-align: center;
}

.css-style-board--alignment-grid article:nth-child(3) {
  text-align: end;
}

.css-style-board--palette article:nth-child(1) {
  background: #f7f9ff;
  color: #07111f;
}

.css-style-board--palette article:nth-child(1) p,
.css-style-board--palette article:nth-child(1) h3 {
  color: #07111f;
}

.css-style-board--palette article:nth-child(2) {
  background: #cfd8e6;
  color: #07111f;
}

.css-style-board--palette article:nth-child(2) p,
.css-style-board--palette article:nth-child(2) h3 {
  color: #07111f;
}

.css-style-board--palette article:nth-child(3) {
  background: #8cffc1;
  color: #061018;
}

.css-style-board--palette article:nth-child(3) p,
.css-style-board--palette article:nth-child(3) h3 {
  color: #061018;
}

.css-style-board--palette article:nth-child(4) {
  background: #ff5d73;
  color: #19070b;
}

.css-style-board--palette article:nth-child(4) p,
.css-style-board--palette article:nth-child(4) h3 {
  color: #19070b;
}

.css-style-board--surface-layers article:nth-child(1) {
  background: #07111f;
}

.css-style-board--surface-layers article:nth-child(2) {
  background:
    radial-gradient(circle at 65% 28%, rgba(98, 213, 255, 0.35), transparent 34%),
    #07111f;
}

.css-style-board--surface-layers article:nth-child(3) {
  background:
    linear-gradient(rgba(7, 17, 31, 0.72), rgba(7, 17, 31, 0.72)),
    radial-gradient(circle at 65% 28%, rgba(98, 213, 255, 0.42), transparent 34%),
    #07111f;
}

.css-style-board--surface-layers article:nth-child(4) {
  background:
    linear-gradient(rgba(7, 17, 31, 0.86), rgba(7, 17, 31, 0.86)),
    radial-gradient(circle at 65% 28%, rgba(140, 255, 193, 0.35), transparent 34%),
    #07111f;
}

.css-style-board--gradient-types article:nth-child(1) {
  background: linear-gradient(135deg, #101827, rgba(98, 213, 255, 0.42));
}

.css-style-board--gradient-types article:nth-child(2) {
  background: radial-gradient(circle at 28% 20%, rgba(140, 255, 193, 0.5), #101827 52%, #07111f);
}

.css-style-board--gradient-types article:nth-child(3) {
  background: conic-gradient(from 210deg, #101827, rgba(98, 213, 255, 0.5), rgba(140, 255, 193, 0.42), #101827);
}

.css-style-board--shadow-depth article:nth-child(1) {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.css-style-board--shadow-depth article:nth-child(2) {
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
}

.css-style-board--shadow-depth article:nth-child(3) {
  box-shadow: 0 38px 100px rgba(0, 0, 0, 0.38);
}

.css-style-board--radius-scale article:nth-child(1) {
  border-radius: 4px;
}

.css-style-board--radius-scale article:nth-child(2) {
  border-radius: 12px;
}

.css-style-board--radius-scale article:nth-child(3) {
  border-radius: 24px;
}

.css-style-board--radius-scale article:nth-child(4) {
  border-radius: 999px;
}

.css-layout-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-layout-board--flow-stack,
.css-layout-board--flex-axis,
.css-layout-board--alignment-controls,
.css-layout-board--grid-tracks,
.css-layout-board--placement-map,
.css-layout-board--position-map,
.css-layout-board--z-layers,
.css-layout-board--sticky-rail,
.css-layout-board--spacing-scale {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-layout-board article {
  position: relative;
  min-height: 158px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at 24% 0%, rgba(140, 255, 193, 0.11), transparent 38%),
    rgba(5, 9, 16, 0.74);
  overflow: hidden;
}

.css-layout-board article::before {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -46px;
  width: 132px;
  height: 132px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.css-layout-board article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -15px;
  z-index: 2;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue));
}

.css-layout-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(140, 255, 193, 0.26);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-layout-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-layout-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-layout-board--flow-stack {
  grid-template-columns: 1fr;
}

.css-layout-board--flow-stack article {
  min-height: 118px;
}

.css-layout-board--flow-stack article:not(:last-child)::after {
  top: auto;
  right: auto;
  bottom: -15px;
  left: 32px;
  width: 2px;
  height: 16px;
  background: linear-gradient(180deg, var(--green), var(--blue));
}

.css-layout-board--flex-axis article:nth-child(2),
.css-layout-board--alignment-controls article:nth-child(2),
.css-layout-board--grid-tracks article:nth-child(2),
.css-layout-board--placement-map article:nth-child(2) {
  background:
    radial-gradient(circle at 24% 0%, rgba(98, 213, 255, 0.16), transparent 38%),
    rgba(5, 9, 16, 0.74);
}

.css-layout-board--flex-axis article:nth-child(3),
.css-layout-board--alignment-controls article:nth-child(3),
.css-layout-board--grid-tracks article:nth-child(3),
.css-layout-board--placement-map article:nth-child(3) {
  background:
    radial-gradient(circle at 24% 0%, rgba(255, 181, 95, 0.14), transparent 38%),
    rgba(5, 9, 16, 0.74);
}

.css-layout-board--flex-axis article:nth-child(4),
.css-layout-board--alignment-controls article:nth-child(4),
.css-layout-board--grid-tracks article:nth-child(4),
.css-layout-board--placement-map article:nth-child(4) {
  background:
    radial-gradient(circle at 24% 0%, rgba(255, 93, 115, 0.12), transparent 38%),
    rgba(5, 9, 16, 0.74);
}

.css-layout-board--grid-tracks,
.css-layout-board--placement-map {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    rgba(5, 9, 16, 0.62);
  background-size: 25% 50%, 25% 50%, auto;
}

.css-layout-board--position-map article:nth-child(2),
.css-layout-board--z-layers article:nth-child(2),
.css-layout-board--sticky-rail article:nth-child(2) {
  transform: translateY(14px);
}

.css-layout-board--position-map article:nth-child(3),
.css-layout-board--z-layers article:nth-child(3),
.css-layout-board--sticky-rail article:nth-child(3) {
  transform: translateY(28px);
}

.css-layout-board--position-map article:nth-child(4),
.css-layout-board--z-layers article:nth-child(4),
.css-layout-board--sticky-rail article:nth-child(4) {
  transform: translateY(42px);
}

.css-layout-board--z-layers article:nth-child(1) {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.css-layout-board--z-layers article:nth-child(2) {
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.24);
}

.css-layout-board--z-layers article:nth-child(3) {
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.3);
}

.css-layout-board--z-layers article:nth-child(4) {
  box-shadow: 0 36px 100px rgba(0, 0, 0, 0.38);
}

.css-layout-board--spacing-scale article:nth-child(1) {
  padding: 12px;
}

.css-layout-board--spacing-scale article:nth-child(2) {
  padding: 18px;
}

.css-layout-board--spacing-scale article:nth-child(3) {
  padding: 26px;
}

.css-layout-board--spacing-scale article:nth-child(4) {
  padding: 36px;
}

.css-responsive-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-responsive-board--mobile-first,
.css-responsive-board--media-queries,
.css-responsive-board--container-queries,
.css-responsive-board--fluid-layouts,
.css-responsive-board--responsive-images,
.css-responsive-board--breakpoints,
.css-responsive-board--touch-targets {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-responsive-board article {
  position: relative;
  min-height: 162px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.11), transparent 42%),
    rgba(5, 9, 16, 0.76);
  overflow: hidden;
}

.css-responsive-board article::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  pointer-events: none;
}

.css-responsive-board article::after {
  content: "";
  position: absolute;
  right: -48px;
  bottom: -48px;
  width: 128px;
  height: 128px;
  border-radius: 999px;
  background: rgba(140, 255, 193, 0.06);
}

.css-responsive-board article:not(:last-child) {
  box-shadow: 14px 0 0 rgba(98, 213, 255, 0.04);
}

.css-responsive-board article:not(:last-child)::before {
  border-color: rgba(98, 213, 255, 0.16);
}

.css-responsive-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(98, 213, 255, 0.28);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-responsive-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-responsive-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-responsive-board--mobile-first article:nth-child(1),
.css-responsive-board--breakpoints article:nth-child(1) {
  max-width: 72%;
}

.css-responsive-board--mobile-first article:nth-child(2),
.css-responsive-board--breakpoints article:nth-child(2) {
  max-width: 84%;
}

.css-responsive-board--mobile-first article:nth-child(3),
.css-responsive-board--breakpoints article:nth-child(3) {
  max-width: 96%;
}

.css-responsive-board--mobile-first article:nth-child(4),
.css-responsive-board--breakpoints article:nth-child(4) {
  max-width: 100%;
}

.css-responsive-board--media-queries,
.css-responsive-board--breakpoints {
  padding-block-start: 20px;
  border-top: 2px solid rgba(98, 213, 255, 0.2);
}

.css-responsive-board--media-queries article:nth-child(2),
.css-responsive-board--container-queries article:nth-child(2),
.css-responsive-board--fluid-layouts article:nth-child(2),
.css-responsive-board--responsive-images article:nth-child(2),
.css-responsive-board--touch-targets article:nth-child(2) {
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.13), transparent 42%),
    rgba(5, 9, 16, 0.76);
}

.css-responsive-board--media-queries article:nth-child(3),
.css-responsive-board--container-queries article:nth-child(3),
.css-responsive-board--fluid-layouts article:nth-child(3),
.css-responsive-board--responsive-images article:nth-child(3),
.css-responsive-board--touch-targets article:nth-child(3) {
  background:
    linear-gradient(135deg, rgba(255, 181, 95, 0.13), transparent 42%),
    rgba(5, 9, 16, 0.76);
}

.css-responsive-board--media-queries article:nth-child(4),
.css-responsive-board--container-queries article:nth-child(4),
.css-responsive-board--fluid-layouts article:nth-child(4),
.css-responsive-board--responsive-images article:nth-child(4),
.css-responsive-board--touch-targets article:nth-child(4) {
  background:
    linear-gradient(135deg, rgba(255, 93, 115, 0.12), transparent 42%),
    rgba(5, 9, 16, 0.76);
}

.css-responsive-board--container-queries {
  grid-template-columns: 1.1fr 0.82fr 1.08fr 1fr;
}

.css-responsive-board--fluid-layouts article:nth-child(1) {
  transform: scale(0.9);
  transform-origin: left center;
}

.css-responsive-board--fluid-layouts article:nth-child(3) {
  transform: scale(1.04);
}

.css-responsive-board--fluid-layouts article:nth-child(4) {
  transform: scale(1.08);
  transform-origin: right center;
}

.css-responsive-board--responsive-images article {
  aspect-ratio: 4 / 3;
}

.css-responsive-board--responsive-images article:nth-child(1) {
  aspect-ratio: 1 / 1;
}

.css-responsive-board--responsive-images article:nth-child(4) {
  aspect-ratio: 4 / 5;
}

.css-responsive-board--touch-targets article {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 176px;
}

.css-responsive-board--touch-targets article::before {
  inset: 20px;
  border-radius: 999px;
}

.css-component-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-component-board--buttons,
.css-component-board--cards,
.css-component-board--navigation,
.css-component-board--form-styling,
.css-component-board--table-styling,
.css-component-board--modals,
.css-component-board--badges-alerts,
.css-component-board--component-states {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-component-board article {
  position: relative;
  min-height: 164px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 181, 95, 0.11), transparent 38%),
    rgba(5, 9, 16, 0.76);
  overflow: hidden;
}

.css-component-board article::before {
  content: "";
  position: absolute;
  right: 16px;
  top: 16px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
}

.css-component-board article::after {
  content: "";
  position: absolute;
  left: -54px;
  bottom: -54px;
  width: 140px;
  height: 140px;
  border-radius: 999px;
  background: rgba(98, 213, 255, 0.055);
}

.css-component-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 181, 95, 0.28);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--orange);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-component-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-component-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-component-board--buttons article:nth-child(1),
.css-component-board--navigation article:nth-child(3),
.css-component-board--component-states article:nth-child(3) {
  background:
    radial-gradient(circle at 20% 0%, rgba(140, 255, 193, 0.14), transparent 38%),
    rgba(5, 9, 16, 0.76);
}

.css-component-board--buttons article:nth-child(3),
.css-component-board--navigation article:nth-child(4),
.css-component-board--form-styling article:nth-child(2) {
  border-radius: 999px;
}

.css-component-board--cards article,
.css-component-board--form-styling article,
.css-component-board--badges-alerts article {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.css-component-board--cards article:nth-child(1)::before {
  width: auto;
  height: 52px;
  right: 18px;
  left: 18px;
  border-radius: 16px;
}

.css-component-board--table-styling,
.css-component-board--modals {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    rgba(5, 9, 16, 0.58);
  background-size: 25% 50%, 25% 50%, auto;
}

.css-component-board--modals article:nth-child(1),
.css-component-board--modals article:nth-child(4) {
  opacity: 0.72;
}

.css-component-board--modals article:nth-child(2) {
  transform: scale(1.06);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.3);
}

.css-component-board--badges-alerts article:nth-child(1) span {
  color: var(--blue);
  border-color: rgba(98, 213, 255, 0.3);
}

.css-component-board--badges-alerts article:nth-child(2) span {
  color: var(--green);
  border-color: rgba(140, 255, 193, 0.3);
}

.css-component-board--badges-alerts article:nth-child(4) span {
  color: var(--red);
  border-color: rgba(255, 93, 115, 0.3);
}

.css-component-board--component-states article:nth-child(2) {
  transform: translateY(-8px);
}

.css-component-board--component-states article:nth-child(4) {
  opacity: 0.62;
}

.css-animation-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-animation-board--transitions,
.css-animation-board--transforms,
.css-animation-board--keyframes,
.css-animation-board--hover-focus,
.css-animation-board--reduced-motion,
.css-animation-board--micro-interactions {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-animation-board article {
  position: relative;
  min-height: 166px;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.08), transparent 42%),
    rgba(5, 9, 16, 0.76);
  overflow: hidden;
}

.css-animation-board article::before {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(140, 255, 193, 0.24);
  background:
    radial-gradient(circle at 35% 35%, rgba(140, 255, 193, 0.42), transparent 38%),
    rgba(255, 255, 255, 0.04);
}

.css-animation-board article::after {
  content: "";
  position: absolute;
  top: 38px;
  right: -34px;
  width: 76px;
  height: 2px;
  background: linear-gradient(90deg, rgba(98, 213, 255, 0), rgba(98, 213, 255, 0.72));
}

.css-animation-board article:last-child::after {
  display: none;
}

.css-animation-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(98, 213, 255, 0.3);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-animation-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-animation-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-animation-board--transitions article:nth-child(2),
.css-animation-board--hover-focus article:nth-child(2),
.css-animation-board--micro-interactions article:nth-child(2) {
  transform: translateY(-8px);
}

.css-animation-board--transforms article:nth-child(2) {
  transform: translateY(-10px) rotate(-1deg);
}

.css-animation-board--transforms article:nth-child(3) {
  transform: scale(1.04);
}

.css-animation-board--keyframes article:nth-child(1)::before {
  opacity: 0.45;
}

.css-animation-board--keyframes article:nth-child(2)::before,
.css-animation-board--keyframes article:nth-child(3)::before {
  transform: scale(1.2);
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 181, 95, 0.48), transparent 38%),
    rgba(255, 255, 255, 0.04);
}

.css-animation-board--keyframes article:nth-child(4)::before {
  opacity: 0.8;
}

.css-animation-board--hover-focus article:nth-child(3) {
  outline: 3px solid rgba(98, 213, 255, 0.55);
  outline-offset: 3px;
}

.css-animation-board--reduced-motion article:nth-child(3),
.css-animation-board--reduced-motion article:nth-child(4) {
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.08), transparent 42%),
    rgba(5, 9, 16, 0.76);
}

.css-animation-board--reduced-motion article:nth-child(3)::after,
.css-animation-board--reduced-motion article:nth-child(4)::after {
  opacity: 0.22;
}

.css-animation-board--micro-interactions article:nth-child(3) span {
  color: var(--green);
  border-color: rgba(140, 255, 193, 0.32);
}

.css-architecture-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-architecture-board--file-structure,
.css-architecture-board--naming-classes,
.css-architecture-board--utility-classes,
.css-architecture-board--design-tokens,
.css-architecture-board--component-css,
.css-architecture-board--splitting-css,
.css-architecture-board--debugging-css {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-architecture-board article {
  position: relative;
  min-height: 178px;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(255, 181, 95, 0.1), transparent 42%),
    rgba(5, 9, 16, 0.78);
  overflow: hidden;
}

.css-architecture-board article::before {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid rgba(255, 181, 95, 0.3);
  background:
    linear-gradient(135deg, rgba(255, 181, 95, 0.36), rgba(98, 213, 255, 0.08)),
    rgba(255, 255, 255, 0.04);
  transform: rotate(4deg);
}

.css-architecture-board article::after {
  content: "";
  position: absolute;
  right: -22px;
  bottom: 22px;
  width: 92px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 181, 95, 0), rgba(140, 255, 193, 0.65));
}

.css-architecture-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 181, 95, 0.36);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--yellow);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-architecture-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-architecture-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-architecture-board--file-structure article:nth-child(1)::before,
.css-architecture-board--splitting-css article:nth-child(1)::before {
  border-radius: 10px;
  box-shadow:
    0 10px 0 rgba(98, 213, 255, 0.12),
    0 20px 0 rgba(140, 255, 193, 0.1);
}

.css-architecture-board--naming-classes article:nth-child(2),
.css-architecture-board--component-css article:nth-child(2) {
  transform: translateY(-8px);
}

.css-architecture-board--naming-classes article:nth-child(3) span,
.css-architecture-board--component-css article:nth-child(3) span,
.css-architecture-board--design-tokens article:nth-child(2) span {
  color: var(--green);
  border-color: rgba(140, 255, 193, 0.35);
}

.css-architecture-board--utility-classes article:nth-child(2)::before {
  border-radius: 999px;
  transform: rotate(0deg);
}

.css-architecture-board--design-tokens article {
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.1), transparent 42%),
    rgba(5, 9, 16, 0.78);
}

.css-architecture-board--design-tokens article:nth-child(4)::before {
  background:
    linear-gradient(135deg, rgba(98, 213, 255, 0.38), rgba(255, 181, 95, 0.12)),
    rgba(255, 255, 255, 0.04);
}

.css-architecture-board--debugging-css article:nth-child(2) {
  outline: 3px solid rgba(98, 213, 255, 0.4);
  outline-offset: 3px;
}

.css-architecture-board--debugging-css article:nth-child(3)::before {
  transform: rotate(0deg) scale(1.12);
  border-color: rgba(140, 255, 193, 0.38);
}

.css-production-board {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.css-production-board--accessibility,
.css-production-board--performance,
.css-production-board--browser-support,
.css-production-board--supports-rule,
.css-production-board--print-css,
.css-production-board--minification,
.css-production-board--release-checklist {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.css-production-board article {
  position: relative;
  min-height: 178px;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.09), transparent 44%),
    rgba(5, 9, 16, 0.78);
  overflow: hidden;
}

.css-production-board article::before {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 46px;
  height: 46px;
  border-radius: 999px;
  border: 1px solid rgba(140, 255, 193, 0.3);
  background:
    radial-gradient(circle at 35% 35%, rgba(140, 255, 193, 0.38), transparent 38%),
    rgba(255, 255, 255, 0.04);
}

.css-production-board article::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: 24px;
  width: 88px;
  height: 2px;
  background: linear-gradient(90deg, rgba(140, 255, 193, 0), rgba(98, 213, 255, 0.64));
}

.css-production-board span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 14px;
  border: 1px solid rgba(140, 255, 193, 0.34);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 1000;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.css-production-board h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 2vw, 27px);
  line-height: 1.05;
}

.css-production-board p {
  position: relative;
  z-index: 1;
  color: #d6deec;
  line-height: 1.65;
}

.css-production-board--accessibility article:nth-child(1) {
  outline: 3px solid rgba(98, 213, 255, 0.42);
  outline-offset: 3px;
}

.css-production-board--performance article:nth-child(4),
.css-production-board--supports-rule article:nth-child(3),
.css-production-board--release-checklist article:nth-child(4) {
  transform: translateY(-8px);
}

.css-production-board--browser-support article:nth-child(3) span,
.css-production-board--supports-rule article:nth-child(2) span,
.css-production-board--release-checklist article:nth-child(2) span {
  color: var(--blue);
  border-color: rgba(98, 213, 255, 0.34);
}

.css-production-board--print-css article {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 44%),
    rgba(5, 9, 16, 0.78);
}

.css-production-board--print-css article:nth-child(3)::before {
  border-radius: 10px;
  box-shadow:
    0 10px 0 rgba(255, 255, 255, 0.12),
    0 20px 0 rgba(255, 255, 255, 0.08);
}

.css-production-board--minification article:nth-child(2)::before {
  width: 56px;
  height: 24px;
  border-radius: 999px;
  transform: translateY(10px);
}

.css-production-board--release-checklist article:nth-child(1)::before,
.css-production-board--release-checklist article:nth-child(2)::before,
.css-production-board--release-checklist article:nth-child(3)::before,
.css-production-board--release-checklist article:nth-child(4)::before {
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(140, 255, 193, 0.38), rgba(98, 213, 255, 0.12)),
    rgba(255, 255, 255, 0.04);
}

.sidebar {
  position: sticky;
  top: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  background: rgba(8, 12, 20, 0.76);
}

.sidebar a {
  display: block;
  padding: 10px 0;
  color: #d6deec;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar a:hover {
  color: var(--green);
}

.foot {
  position: relative;
  padding: 48px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 920px) {
  .course-shell,
  .shell {
    width: min(100% - 32px, 100%);
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .hero--lesson,
  .article-grid,
  .course-hero,
  .course-layout {
    grid-template-columns: 1fr;
  }

  .course-nav {
    position: relative;
    top: 0;
    width: 100%;
    max-height: none;
  }

  .course-hero {
    gap: 28px;
    padding: 64px 0 42px;
  }

  .lesson-title {
    max-width: 100%;
    font-size: clamp(34px, 10vw, 46px);
    overflow-wrap: break-word;
  }

  .lead {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .terminal {
    width: 100%;
  }

  .terminal pre,
  .syntax-anatomy__code code {
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    word-break: break-word;
  }

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

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

  .lesson-index--dense {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-pagination {
    grid-template-columns: 1fr;
  }

  .lesson-pagination .button:last-child {
    justify-self: stretch;
  }

  .code-lab__header,
  .code-lab__grid {
    grid-template-columns: 1fr;
  }

  .structure-grid,
  .reference-grid,
  .css-lesson .reference-grid--wide,
  .css-comment-visual,
  .css-connection-visual,
  .css-selector-visual__steps,
  .devtools-visual,
  .css-control-stack,
  .css-control-stack--specificity-meter,
  .css-control-stack--layer-stack,
  .css-control-stack--variable-flow,
  .css-inheritance-tree,
  .css-box-anatomy,
  .css-box-flow,
  .css-box-flow--sizing-compare,
  .css-box-flow--display-map,
  .css-style-board,
  .css-style-board--type-scale,
  .css-style-board--palette,
  .css-style-board--surface-layers,
  .css-style-board--radius-scale,
  .css-layout-board,
  .css-layout-board--flow-stack,
  .css-layout-board--flex-axis,
  .css-layout-board--alignment-controls,
  .css-layout-board--grid-tracks,
  .css-layout-board--placement-map,
  .css-layout-board--position-map,
  .css-layout-board--z-layers,
  .css-layout-board--sticky-rail,
  .css-layout-board--spacing-scale,
  .css-responsive-board,
  .css-responsive-board--mobile-first,
  .css-responsive-board--media-queries,
  .css-responsive-board--container-queries,
  .css-responsive-board--fluid-layouts,
  .css-responsive-board--responsive-images,
  .css-responsive-board--breakpoints,
  .css-responsive-board--touch-targets,
  .css-component-board,
  .css-component-board--buttons,
  .css-component-board--cards,
  .css-component-board--navigation,
  .css-component-board--form-styling,
  .css-component-board--table-styling,
  .css-component-board--modals,
  .css-component-board--badges-alerts,
  .css-component-board--component-states,
  .css-animation-board,
  .css-animation-board--transitions,
  .css-animation-board--transforms,
  .css-animation-board--keyframes,
  .css-animation-board--hover-focus,
  .css-animation-board--reduced-motion,
  .css-animation-board--micro-interactions,
  .css-architecture-board,
  .css-architecture-board--file-structure,
  .css-architecture-board--naming-classes,
  .css-architecture-board--utility-classes,
  .css-architecture-board--design-tokens,
  .css-architecture-board--component-css,
  .css-architecture-board--splitting-css,
  .css-architecture-board--debugging-css,
  .css-production-board,
  .css-production-board--accessibility,
  .css-production-board--performance,
  .css-production-board--browser-support,
  .css-production-board--supports-rule,
  .css-production-board--print-css,
  .css-production-board--minification,
  .css-production-board--release-checklist,
  .course-section.element-lesson .reference-grid,
  .course-section.element-lesson .do-dont-grid,
  .decision-grid,
  .download-grid,
  .do-dont-grid,
  .document-anatomy,
  .tag-anatomy,
  .syntax-anatomy__parts,
  .file-tree-card,
  .browser-pipeline,
  .element-map,
  .element-map--compact,
  .element-lesson,
  .editor-card,
  .code-lab--wide .code-lab__grid {
    grid-template-columns: 1fr;
  }

  .course-section.element-lesson .mini-card,
  .course-section.element-lesson .element-card {
    width: 100%;
    max-width: 100%;
  }

  .course-section.element-lesson .mini-card pre {
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    word-break: break-word;
  }

  .browser-pipeline article:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: -15px;
    left: 28px;
    width: 2px;
    height: 16px;
    background: linear-gradient(180deg, var(--blue), var(--green));
  }

  .css-comment-visual article:not(:last-child)::after,
  .css-connection-visual article:not(:last-child)::after,
  .css-selector-visual__steps article:not(:last-child)::after,
  .css-control-stack article:not(:last-child)::after,
  .css-inheritance-tree article:not(:last-child)::after,
  .css-layout-board article:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: -15px;
    left: 28px;
    width: 2px;
    height: 16px;
    background: linear-gradient(180deg, var(--blue), var(--green));
  }

  .css-inheritance-tree article:nth-child(2),
  .css-inheritance-tree article:nth-child(3),
  .css-inheritance-tree article:nth-child(4) {
    margin-top: 0;
  }

  .css-layout-board--position-map article:nth-child(2),
  .css-layout-board--position-map article:nth-child(3),
  .css-layout-board--position-map article:nth-child(4),
  .css-layout-board--z-layers article:nth-child(2),
  .css-layout-board--z-layers article:nth-child(3),
  .css-layout-board--z-layers article:nth-child(4),
  .css-layout-board--sticky-rail article:nth-child(2),
  .css-layout-board--sticky-rail article:nth-child(3),
  .css-layout-board--sticky-rail article:nth-child(4) {
    transform: none;
  }

  .css-responsive-board--mobile-first article:nth-child(1),
  .css-responsive-board--mobile-first article:nth-child(2),
  .css-responsive-board--mobile-first article:nth-child(3),
  .css-responsive-board--mobile-first article:nth-child(4),
  .css-responsive-board--breakpoints article:nth-child(1),
  .css-responsive-board--breakpoints article:nth-child(2),
  .css-responsive-board--breakpoints article:nth-child(3),
  .css-responsive-board--breakpoints article:nth-child(4) {
    max-width: 100%;
  }

  .css-responsive-board--fluid-layouts article:nth-child(1),
  .css-responsive-board--fluid-layouts article:nth-child(3),
  .css-responsive-board--fluid-layouts article:nth-child(4) {
    transform: none;
  }

  .css-component-board--modals article:nth-child(2),
  .css-component-board--component-states article:nth-child(2),
  .css-animation-board--transitions article:nth-child(2),
  .css-animation-board--transforms article:nth-child(2),
  .css-animation-board--transforms article:nth-child(3),
  .css-animation-board--hover-focus article:nth-child(2),
  .css-animation-board--micro-interactions article:nth-child(2),
  .css-architecture-board--naming-classes article:nth-child(2),
  .css-architecture-board--component-css article:nth-child(2),
  .css-production-board--performance article:nth-child(4),
  .css-production-board--supports-rule article:nth-child(3),
  .css-production-board--release-checklist article:nth-child(4) {
    transform: none;
  }

  .devtools-visual > div {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .devtools-visual > div:last-child {
    border-bottom: 0;
  }

  .syntax-anatomy__full {
    grid-column: span 1;
  }

  .code-lab__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .self-check-section__head {
    flex-direction: column;
  }

  .editor-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .sidebar {
    position: relative;
    top: 0;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero {
    padding-top: 54px;
  }

  pre {
    padding: 18px;
    font-size: 13px;
  }

  .lesson-index {
    grid-template-columns: 1fr;
  }

  .lesson-index--home .card h3 {
    white-space: normal;
  }

  .lesson-index--dense {
    grid-template-columns: 1fr;
  }
}