:root {
  --paper: #f5f1e7;
  --paper-light: #fffdf6;
  --ink: #242a28;
  --muted: #5c625c;
  --blue: #1539b6;
  --coral: #ef9c85;
  --line: #d8d6c9;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Arial, Helvetica, sans-serif;
  --mono: 'Courier New', monospace;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 28px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 var(--sans);
}
a {
  color: inherit;
}
button,
input,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
button,
a,
textarea,
summary {
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible,
a:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
}
button:disabled {
  cursor: default;
}
button:focus:not(:focus-visible) {
  outline: 0;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  font-weight: 400;
}
svg {
  display: block;
  max-width: 100%;
}
[hidden] {
  display: none !important;
}
.wrap {
  width: min(1240px, calc(100% - 112px));
  margin-inline: auto;
}
.section-space {
  padding-block: 106px;
}
.eyebrow {
  font: 11px/1.5 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 20;
  background: var(--blue);
  color: white;
  padding: 12px 18px;
}
.skip-link:focus {
  top: 12px;
}
.site-header {
  height: 108px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue);
  text-decoration: none;
  font-weight: 700;
  font-size: 21px;
  line-height: 0.98;
  letter-spacing: -0.8px;
}
.brand-period {
  color: var(--ink);
}
.site-header nav {
  display: flex;
  gap: 30px;
  font-size: 13px;
}
.site-header nav a,
.header-link {
  text-decoration: none;
}
.site-header nav a:hover,
.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}
.header-link {
  display: flex;
  align-items: center;
  gap: 17px;
  padding: 11px 17px;
  border: 1px solid var(--blue);
  border-radius: 2px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}
.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: 50px;
  padding-block: 74px 89px;
}
.hero .eyebrow {
  color: var(--blue);
  display: flex;
  align-items: center;
  gap: 9px;
}
.tiny-cross {
  font-size: 24px;
  line-height: 1;
}
h1 {
  font: 76px/0.99 var(--serif);
  letter-spacing: -3.5px;
  margin-block: 25px 27px;
}
h1 em {
  color: var(--blue);
  font-weight: 400;
}
.hero-description {
  max-width: 385px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  min-height: 49px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 2px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
}
.button-blue {
  background: var(--blue);
  color: white;
}
.button-blue:hover {
  background: #102f98;
}
.text-link {
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  color: var(--blue);
  text-underline-offset: 5px;
}
.demo-label {
  max-width: 390px;
  margin-top: 20px;
  font-size: 11px;
  line-height: 1.6;
  color: var(--muted);
}
.notebook-scene {
  position: relative;
  margin: 0;
  padding: 27px 30px 0 8px;
}
.notebook {
  position: relative;
  padding: 18px 17px 18px 34px;
  background: var(--blue);
  transform: rotate(-4deg);
  box-shadow: 14px 19px 0 #deded0;
  border-radius: 4px 12px 12px 4px;
}
.notebook-spine {
  position: absolute;
  left: 10px;
  top: 27px;
  bottom: 22px;
  width: 18px;
  background: radial-gradient(ellipse at center, #f5f1e7 0 31%, transparent 34%)
    center top/18px 36px repeat-y;
}
.notebook-page {
  background: var(--paper-light);
  min-height: 450px;
  padding: 24px 24px 18px;
  color: var(--blue);
  border-radius: 0 5px 5px 0;
}
.notebook-meta {
  display: flex;
  justify-content: space-between;
  font: 9px/1.5 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid #b4bce0;
  padding-bottom: 13px;
}
.notebook-title {
  font: 51px/0.98 var(--serif);
  letter-spacing: -1.8px;
  margin: 20px 0 11px;
}
.observation-art {
  width: 100%;
  height: auto;
}
.notebook-caption {
  font: italic 15px/1.4 var(--serif);
  margin-top: 8px;
}
.notebook-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: 9px/1.5 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  padding-top: 18px;
}
.notebook-footer > span:last-child {
  font-size: 27px;
}
.coral-note {
  position: absolute;
  z-index: 2;
  top: 0;
  right: -9px;
  padding: 19px 20px 12px;
  background: var(--coral);
  transform: rotate(9deg);
  box-shadow: 3px 4px 0 #12319118;
  color: #2c3032;
}
.coral-note > span {
  font: 9px var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.coral-note strong {
  display: block;
  font: italic 26px/1.15 var(--serif);
  margin: 9px 0;
}
.coral-note svg {
  width: 93px;
  height: 26px;
}
.notebook-scene figcaption {
  font: 10px/1.5 var(--mono);
  color: var(--muted);
  margin: 33px 0 0 33px;
}
.practice-band {
  background: var(--blue);
  color: var(--paper-light);
}
.practice-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: center;
  padding-block: 33px;
}
.practice-inner > p {
  font: 29px/1.15 var(--serif);
  letter-spacing: -0.5px;
}
.practice-inner ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 32px;
}
.practice-inner li {
  border-left: 1px solid #8c9cdb;
  padding-left: 22px;
}
.practice-inner li > span {
  display: block;
  font: 10px/1.5 var(--mono);
  margin-bottom: 5px;
  color: #e0e5ff;
}
.practice-inner strong {
  font-size: 16px;
}
.practice-inner small {
  display: block;
  color: #e0e5ff;
  font-size: 12px;
  margin-top: 3px;
  line-height: 1.5;
}
.curriculum-section {
  display: grid;
  grid-template-columns: 245px minmax(0, 1fr);
  gap: 90px;
}
.margin-notes {
  padding-top: 8px;
  color: var(--blue);
}
.margin-title {
  font: 24px/1.3 var(--serif);
  margin-top: 25px;
  letter-spacing: -0.3px;
}
.margin-rule {
  height: 1px;
  width: 44px;
  background: var(--blue);
  margin: 24px 0;
}
.margin-notes > p:not(.eyebrow, .margin-title, .hand-note) {
  font-size: 13px;
  color: var(--muted);
  max-width: 170px;
}
.hand-note {
  font: italic 24px/1.25 var(--serif);
  transform: rotate(-7deg);
  margin: 40px 0 8px 17px;
}
.margin-notes > svg {
  margin-left: 81px;
}
h2 {
  font: 52px/1.06 var(--serif);
  letter-spacing: -1.7px;
}
.section-heading h2 {
  margin: 15px 0 21px;
}
.section-heading > p:last-child {
  max-width: 485px;
  font-size: 15px;
  color: var(--muted);
}
.chapter-list {
  margin-top: 36px;
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  list-style: none;
  cursor: pointer;
}
summary::-webkit-details-marker {
  display: none;
}
.chapter-list summary {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 16px;
  padding: 22px 0;
}
.chapter-number {
  font: 12px var(--mono);
  color: var(--blue);
  align-self: start;
  margin-top: 7px;
}
.chapter-list summary strong {
  display: block;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
}
.chapter-list summary small {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 400;
  line-height: 1.5;
  margin-top: 4px;
}
.disclosure-mark {
  position: relative;
  width: 16px;
  height: 16px;
  color: var(--blue);
}
.disclosure-mark::before,
.disclosure-mark::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 1.5px;
  background: currentColor;
  left: 1px;
  top: 7px;
}
.disclosure-mark::after {
  transform: rotate(90deg);
}
details[open] .disclosure-mark::after {
  transform: none;
}
.chapter-body {
  padding: 0 28px 26px 60px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.chapter-body ul {
  padding-left: 18px;
  margin: 12px 0 17px;
}
.chapter-body li {
  padding-left: 3px;
  margin: 3px 0;
}
.lesson-section {
  background: #e9ebdf;
  border-block: 1px solid var(--line);
  padding: 82px 0 67px;
}
.lesson-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 37px;
}
.lesson-heading h2 {
  margin-top: 14px;
}
.lesson-heading > p {
  max-width: 286px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  padding-bottom: 4px;
}
.lesson-workbench {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  border: 1px solid #bebfac;
  background: var(--paper-light);
  box-shadow: 9px 9px 0 #d9dccd;
  min-width: 0;
}
.lesson-left {
  min-width: 0;
}
.lesson-selector {
  display: flex;
  border-bottom: 1px solid var(--line);
}
.lesson-selector button {
  flex: 1;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 18px 13px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  min-width: 0;
}
.lesson-selector button:last-child {
  border-right: 0;
}
.lesson-selector button span {
  font: 10px var(--mono);
  margin-right: 8px;
}
.lesson-selector button[aria-pressed='true'] {
  background: var(--blue);
  color: white;
}
.lesson-selector button:focus-visible {
  outline-offset: -5px;
  outline-color: var(--coral);
}
.exercise {
  padding: 35px 39px 31px;
}
.exercise + .exercise {
  border-top: 1px solid var(--line);
}
.exercise-label {
  font: 10px var(--mono);
  letter-spacing: 0.07em;
  color: var(--blue);
  text-transform: uppercase;
}
.exercise h3 {
  font: 34px/1.15 var(--serif);
  letter-spacing: -0.7px;
  margin: 14px 0 17px;
}
.exercise > p:not(.exercise-label) {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.example-note {
  border-left: 2px solid var(--coral);
  padding: 0 0 0 17px;
  margin: 25px 0;
}
.example-note > span {
  display: block;
  font: 9px/1.5 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 15px;
}
.example-note > p {
  font: italic 19px/1.5 var(--serif);
  margin-top: 4px;
}
.exercise .exercise-tip {
  font-size: 12px !important;
}
.working-note {
  min-width: 0;
  background: #fffdf2;
  border-left: 1px solid #bebfac;
  display: flex;
  flex-direction: column;
  padding: 26px 28px 18px;
}
.note-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 17px;
}
.note-heading label {
  font: 19px var(--serif);
}
.note-heading button {
  background: none;
  border: 0;
  color: var(--blue);
  padding: 5px 0;
  font-size: 11px;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.working-note textarea {
  width: 100%;
  min-height: 260px;
  flex: 1;
  border: 0;
  resize: vertical;
  padding: 15px 0 0;
  background: repeating-linear-gradient(
    transparent 0,
    transparent 31px,
    #e3e0cb 31px,
    #e3e0cb 32px
  );
  color: var(--ink);
  font: italic 17px/32px var(--serif);
  border-radius: 0;
}
.working-note textarea::placeholder {
  color: #717469;
  opacity: 1;
}
.working-note textarea:focus-visible {
  outline-offset: 3px;
}
.note-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 13px;
  margin-top: 16px;
}
.note-bottom p {
  font-size: 10px;
  line-height: 1.7;
  color: var(--muted);
}
#note-count {
  text-align: right;
  max-width: 132px;
}
.lesson-live {
  font: 10px/1.6 var(--mono);
  color: var(--muted);
  min-height: 18px;
  margin-top: 17px;
}
.classroom-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: center;
}
.classroom-poster {
  position: relative;
  padding: 46px 40px 54px;
  background: var(--blue);
  color: var(--paper-light);
  transform: rotate(-2deg);
  min-height: 410px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.classroom-poster > p {
  font: 55px/1.05 var(--serif);
  letter-spacing: -1.5px;
  margin: 25px 0;
}
.classroom-poster > svg {
  width: 175px;
  color: var(--coral);
}
.poster-corner {
  position: absolute;
  right: 29px;
  bottom: 30px;
  font-size: 65px;
  line-height: 1;
  color: var(--coral);
}
.classroom-copy h2 {
  margin: 15px 0 23px;
}
.classroom-copy > p:not(.eyebrow) {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.classroom-copy dl {
  margin: 28px 0 0;
}
.classroom-copy dl > div {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 14px;
}
.classroom-copy dt {
  font-size: 12px;
  font-weight: 700;
}
.classroom-copy dd {
  margin: 0;
  font-size: 12px;
  line-height: 1.75;
  color: var(--muted);
}
.course-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  border-top: 1px solid var(--line);
  padding-block: 64px 72px;
}
.course-details h2 {
  font-size: 41px;
  margin-top: 15px;
}
.enrollment-guidance > p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.85;
}
.enrollment-guidance details {
  border-top: 1px solid var(--line);
  margin: 24px 0;
}
.enrollment-guidance summary {
  padding: 16px 0;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 15px;
}
.enrollment-guidance summary span {
  color: var(--blue);
  font-size: 19px;
  font-weight: 400;
}
.enrollment-guidance details ol {
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
  padding-left: 18px;
  margin: 0 0 22px;
}
.enrollment-guidance details li + li {
  margin-top: 9px;
}
.site-footer {
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 40px;
  justify-content: space-between;
  padding-block: 29px 34px;
}
.footer-brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--blue);
  text-decoration: none;
}
.site-footer p {
  margin-right: auto;
  font-size: 11px;
  line-height: 1.7;
  color: var(--muted);
}
.creator-credit {
  font-size: 11px;
  text-decoration: none;
  text-underline-offset: 5px;
}
.creator-credit:hover {
  text-decoration: underline;
}
#main:focus {
  outline: none;
}
@media (max-width: 1100px) {
  .wrap {
    width: calc(100% - 72px);
  }
  .hero {
    gap: 36px;
  }
  h1 {
    font-size: 65px;
  }
  .hero-actions {
    gap: 16px;
  }
  .hero-description {
    font-size: 15px;
  }
  .notebook-scene {
    padding-right: 13px;
  }
  .notebook-page {
    padding: 22px 17px 17px;
    min-height: 410px;
  }
  .notebook-title {
    font-size: 45px;
  }
  .coral-note {
    right: -8px;
    padding: 15px;
  }
  .coral-note strong {
    font-size: 23px;
  }
  .curriculum-section {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 55px;
  }
  .classroom-section,
  .course-details {
    gap: 55px;
  }
  .classroom-poster {
    padding: 35px;
    min-height: 380px;
  }
  .classroom-poster > p {
    font-size: 47px;
  }
  .practice-inner {
    gap: 40px;
  }
  .exercise {
    padding: 30px;
  }
  .working-note {
    padding: 24px;
  }
  .site-header nav {
    gap: 20px;
  }
}
@media (max-width: 800px) {
  .wrap {
    width: calc(100% - 48px);
  }
  .site-header {
    height: 95px;
    gap: 15px;
  }
  .site-header nav {
    gap: 17px;
    font-size: 12px;
  }
  .header-link {
    display: none;
  }
  .hero {
    gap: 24px;
    padding-block: 65px 76px;
  }
  h1 {
    font-size: 55px;
    letter-spacing: -2.5px;
  }
  .hero .eyebrow {
    font-size: 9px;
    letter-spacing: 0.03em;
  }
  .hero-description {
    font-size: 14px;
  }
  .hero-actions {
    align-items: start;
    flex-direction: column;
    gap: 13px;
  }
  .hero .button {
    font-size: 12px;
    padding-inline: 14px;
    gap: 15px;
  }
  .notebook-scene {
    padding: 32px 10px 0 2px;
  }
  .notebook {
    padding: 14px 10px 14px 25px;
    box-shadow: 9px 13px 0 #deded0;
  }
  .notebook-spine {
    left: 5px;
    width: 15px;
    background-size: 15px 29px;
  }
  .notebook-page {
    padding: 17px 14px;
    min-height: 355px;
  }
  .notebook-title {
    font-size: 39px;
  }
  .notebook-meta {
    font-size: 8px;
  }
  .coral-note {
    padding: 12px;
    right: -1px;
  }
  .coral-note strong {
    font-size: 20px;
  }
  .coral-note > span {
    font-size: 8px;
  }
  .coral-note svg {
    width: 75px;
  }
  .notebook-caption {
    font-size: 13px;
  }
  .notebook-footer {
    font-size: 7px;
  }
  .notebook-scene figcaption {
    font-size: 8px;
    margin-left: 13px;
  }
  .practice-inner {
    grid-template-columns: 1fr;
    gap: 25px;
    padding-block: 29px;
  }
  .practice-inner > p br {
    display: none;
  }
  .practice-inner > p {
    font-size: 26px;
  }
  .practice-inner ol {
    gap: 15px;
  }
  .practice-inner li {
    padding-left: 15px;
  }
  .section-space {
    padding-block: 78px;
  }
  .curriculum-section {
    grid-template-columns: 165px minmax(0, 1fr);
    gap: 35px;
  }
  h2 {
    font-size: 43px;
  }
  .margin-title {
    font-size: 22px;
  }
  .margin-notes > p:not(.eyebrow, .margin-title, .hand-note) {
    font-size: 12px;
  }
  .hand-note {
    font-size: 21px;
    margin-left: 7px;
  }
  .margin-notes > svg {
    margin-left: 49px;
  }
  .chapter-list summary {
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    gap: 12px;
  }
  .chapter-list summary strong {
    font-size: 15px;
  }
  .chapter-list summary small {
    font-size: 12px;
  }
  .chapter-body {
    padding-left: 42px;
    font-size: 13px;
  }
  .lesson-section {
    padding-block: 62px 50px;
  }
  .lesson-heading > p {
    max-width: 230px;
    font-size: 13px;
  }
  .lesson-workbench {
    grid-template-columns: 1.12fr 1fr;
  }
  .lesson-selector button {
    padding: 15px 9px;
    font-size: 12px;
  }
  .lesson-selector button span {
    display: none;
  }
  .exercise {
    padding: 25px;
  }
  .exercise h3 {
    font-size: 29px;
  }
  .exercise > p:not(.exercise-label) {
    font-size: 13px;
  }
  .working-note {
    padding: 22px 18px 18px;
  }
  .note-heading label {
    font-size: 17px;
  }
  .example-note > p {
    font-size: 18px;
  }
  .note-bottom {
    flex-direction: column;
    gap: 8px;
  }
  #note-count {
    text-align: left;
    max-width: none;
  }
  .classroom-section {
    gap: 38px;
  }
  .classroom-poster {
    min-height: 370px;
    padding: 29px;
  }
  .classroom-poster > p {
    font-size: 42px;
  }
  .classroom-copy h2 {
    font-size: 39px;
  }
  .classroom-copy dl > div {
    display: block;
  }
  .classroom-copy dd {
    margin-top: 5px;
  }
  .course-details {
    gap: 38px;
  }
  .course-details h2 {
    font-size: 35px;
  }
  .site-footer {
    gap: 24px;
  }
  .site-footer p {
    max-width: 190px;
  }
}
@media (max-width: 600px) {
  html {
    scroll-padding-top: 16px;
  }
  .wrap {
    width: calc(100% - 40px);
  }
  .site-header {
    height: auto;
    min-height: 94px;
    padding-block: 20px;
    flex-wrap: wrap;
    gap: 18px;
  }
  .brand {
    font-size: 20px;
  }
  .brand svg {
    width: 31px;
    height: 31px;
  }
  .site-header nav {
    gap: 17px;
    flex: 1;
    justify-content: flex-end;
    font-size: 11px;
  }
  .site-header nav a:last-child {
    display: none;
  }
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 45px;
    padding-block: 42px 53px;
  }
  .hero .eyebrow {
    font-size: 9px;
    letter-spacing: 0.055em;
  }
  .tiny-cross {
    font-size: 20px;
  }
  h1 {
    font-size: 58px;
    letter-spacing: -2.8px;
    margin-block: 22px;
  }
  .hero-description {
    font-size: 15px;
    max-width: 355px;
  }
  .hero-actions {
    flex-direction: row;
    align-items: center;
    gap: 16px;
    margin-top: 25px;
  }
  .hero .button {
    font-size: 12px;
    min-height: 48px;
  }
  .hero .text-link {
    font-size: 12px;
  }
  .demo-label {
    font-size: 10px;
    max-width: 320px;
  }
  .notebook-scene {
    width: min(375px, calc(100% - 8px));
    margin-inline: auto;
    padding: 24px 19px 0 3px;
  }
  .notebook-page {
    min-height: 385px;
    padding: 21px 19px;
  }
  .notebook-title {
    font-size: 43px;
  }
  .notebook-meta {
    font-size: 8px;
  }
  .coral-note {
    right: 0;
    top: -1px;
    padding: 13px 17px;
  }
  .coral-note strong {
    font-size: 22px;
  }
  .notebook-footer {
    font-size: 8px;
  }
  .notebook-scene figcaption {
    margin-top: 29px;
    font-size: 9px;
    max-width: 260px;
  }
  .practice-inner {
    gap: 23px;
    padding-block: 28px;
  }
  .practice-inner > p {
    font-size: 27px;
  }
  .practice-inner ol {
    gap: 12px;
  }
  .practice-inner li {
    padding-left: 12px;
  }
  .practice-inner strong {
    font-size: 14px;
  }
  .practice-inner small {
    font-size: 10px;
    line-height: 1.6;
  }
  .practice-inner li > span {
    font-size: 9px;
  }
  .section-space {
    padding-block: 60px;
  }
  .curriculum-section {
    display: block;
  }
  .margin-notes {
    display: none;
  }
  h2 {
    font-size: 43px;
    letter-spacing: -1.4px;
  }
  .section-heading > p:last-child {
    font-size: 14px;
  }
  .chapter-list {
    margin-top: 29px;
  }
  .chapter-list summary {
    grid-template-columns: 27px minmax(0, 1fr) 15px;
    gap: 10px;
    padding-block: 21px;
  }
  .chapter-list summary strong {
    font-size: 15px;
  }
  .chapter-list summary small {
    font-size: 12px;
  }
  .chapter-body {
    padding: 0 6px 24px 37px;
    font-size: 13px;
  }
  .lesson-section {
    padding-block: 54px 39px;
  }
  .lesson-heading {
    display: block;
    margin-bottom: 28px;
  }
  .lesson-heading > p {
    max-width: 340px;
    margin-top: 20px;
    font-size: 14px;
  }
  .lesson-workbench {
    display: block;
    box-shadow: 6px 6px 0 #d9dccd;
  }
  .lesson-selector button {
    padding: 16px 10px;
    font-size: 12px;
  }
  .lesson-selector button span {
    display: inline;
    font-size: 9px;
    margin-right: 5px;
  }
  .exercise {
    padding: 28px 24px;
  }
  .exercise h3 {
    font-size: 32px;
  }
  .exercise > p:not(.exercise-label) {
    font-size: 14px;
  }
  .working-note {
    border-left: 0;
    border-top: 1px solid #bebfac;
    padding: 25px 24px 21px;
  }
  .note-heading label {
    font-size: 19px;
  }
  .working-note textarea {
    min-height: 225px;
    font-size: 18px;
  }
  .note-bottom {
    flex-direction: row;
    gap: 14px;
  }
  .note-bottom p {
    font-size: 10px;
  }
  #note-count {
    text-align: right;
    max-width: 120px;
  }
  .lesson-live {
    font-size: 9px;
  }
  .classroom-section {
    display: flex;
    flex-direction: column;
    gap: 43px;
    align-items: stretch;
  }
  .classroom-poster {
    min-height: 350px;
    padding: 35px;
  }
  .classroom-poster > p {
    font-size: 49px;
  }
  .classroom-copy h2 {
    font-size: 43px;
  }
  .classroom-copy dl > div {
    display: grid;
    grid-template-columns: 105px 1fr;
    gap: 18px;
    padding-block: 16px;
  }
  .classroom-copy dd {
    margin: 0;
  }
  .course-details {
    display: block;
    padding-block: 43px 47px;
  }
  .course-details h2 {
    font-size: 37px;
    margin-bottom: 25px;
  }
  .enrollment-guidance > p {
    font-size: 14px;
  }
  .site-footer {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    padding-block: 26px 32px;
  }
  .site-footer p {
    max-width: none;
    margin: 0;
  }
  .footer-brand {
    font-size: 24px;
  }
  .creator-credit {
    margin-top: 2px;
    justify-self: start;
  }
  .site-footer p br {
    display: none;
  }
}
@media (max-width: 350px) {
  .site-header nav {
    gap: 12px;
    font-size: 10px;
  }
  h1 {
    font-size: 51px;
  }
  .hero-actions {
    align-items: start;
    flex-direction: column;
    gap: 15px;
  }
  .hero .eyebrow {
    font-size: 8px;
  }
  .notebook-page {
    padding: 17px 14px;
    min-height: 348px;
  }
  .notebook-title {
    font-size: 38px;
  }
  .coral-note {
    padding: 11px 13px;
  }
  .coral-note strong {
    font-size: 19px;
  }
  .notebook-meta {
    font-size: 7px;
  }
  .notebook-caption {
    font-size: 12px;
  }
  .notebook-footer {
    font-size: 7px;
  }
  h2 {
    font-size: 38px;
  }
  .exercise {
    padding-inline: 19px;
  }
  .lesson-selector button span {
    display: none;
  }
  .working-note {
    padding-inline: 19px;
  }
  .classroom-poster {
    padding: 27px;
    min-height: 325px;
  }
  .classroom-poster > p {
    font-size: 43px;
  }
  .classroom-copy h2 {
    font-size: 38px;
  }
  .course-details h2 {
    font-size: 33px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}
@media (max-width: 600px) {
  .coral-note {
    top: -24px;
    right: 0;
    width: 126px;
    padding: 10px 12px 8px;
  }
  .coral-note > span {
    font-size: 7px;
  }
  .coral-note strong {
    font-size: 19px;
    line-height: 1.05;
    margin: 8px 0;
  }
  .coral-note svg {
    width: 70px;
    height: 17px;
  }
}
@media (max-width: 350px) {
  .coral-note {
    top: -27px;
    padding: 8px 11px;
  }
  .coral-note strong {
    font-size: 18px;
  }
}