.course-page {
  --course-ink: #132033;
  --course-cyan: #1b8790;
  --course-cyan-dark: #116a72;
  --course-pale: #edf6f7;
  --course-line: #d5e2e7;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 44px 0 72px;
  color: var(--course-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.course-page h1,
.course-page h2,
.course-page h3,
.course-page h4 {
  text-wrap: balance;
}

.course-page p,
.course-page li {
  text-wrap: pretty;
}

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(400px, 0.82fr);
  gap: 64px;
  align-items: center;
  min-height: 540px;
  padding: 32px 0 64px;
  border-bottom: 1px solid var(--course-line);
}

.course-back-link,
.course-primary-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  font-weight: 750;
  text-decoration: none;
}

.course-back-link {
  margin-bottom: 48px;
  color: #607083;
  font-size: 0.9rem;
}

.course-back-link:hover {
  color: var(--course-cyan-dark);
}

.course-code {
  margin: 0 0 15px;
  color: var(--course-cyan-dark);
  font-size: 0.86rem;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.course-hero h1 {
  margin: 0;
  max-width: 700px;
  font-size: clamp(3.1rem, 6vw, 5.7rem);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.course-lede {
  max-width: 650px;
  margin: 30px 0 0;
  color: #56677a;
  font-size: 1.16rem;
  line-height: 1.7;
}

.course-primary-link {
  min-height: 46px;
  margin-top: 34px;
  padding: 0 17px;
  border-radius: 6px;
  color: #fff;
  background: var(--course-ink);
}

.course-primary-link:hover {
  color: #fff;
  background: var(--course-cyan-dark);
}

.course-hero-art {
  position: relative;
  aspect-ratio: 1.68 / 1;
  margin: 0;
  border: 1px solid #263c51;
  border-radius: 10px;
  background: #122033;
  box-shadow: 0 22px 50px rgba(19, 32, 51, 0.16);
  overflow: hidden;
}

.course-hero-art::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.course-hero-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-principles,
.course-projects {
  padding: 76px 0;
  border-bottom: 1px solid var(--course-line);
}

.course-section-heading {
  display: grid;
  grid-template-columns: 200px minmax(0, 720px);
  gap: 36px;
  margin-bottom: 44px;
}

.course-section-heading > p {
  margin: 7px 0 0;
  color: var(--course-cyan-dark);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.course-section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
  font-weight: 830;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.course-principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--course-line);
}

.course-principle-list article {
  min-height: 225px;
  padding: 26px 30px 20px 0;
  border-right: 1px solid var(--course-line);
}

.course-principle-list article + article {
  padding-left: 30px;
}

.course-principle-list article:last-child {
  border-right: 0;
}

.course-principle-list article > span {
  color: var(--course-cyan-dark);
  font: 800 0.76rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.course-principle-list h3 {
  margin: 38px 0 12px;
  font-size: 1.25rem;
  font-weight: 820;
}

.course-principle-list p {
  margin: 0;
  color: #5b6b7c;
  line-height: 1.62;
}

.course-project-card {
  display: block;
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(19, 32, 51, 0.09),
    0 2px 5px rgba(19, 32, 51, 0.05),
    0 18px 44px rgba(19, 32, 51, 0.07);
}

.course-project-card__toggle {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr) 190px;
  min-height: 230px;
  list-style: none;
  cursor: pointer;
  background: #fff;
  transition-property: background-color, box-shadow;
  transition-duration: 180ms;
  transition-timing-function: ease-out;
}

.course-project-card__toggle::-webkit-details-marker {
  display: none;
}

.course-project-card__toggle:hover {
  background: #fbfdfe;
}

.course-project-card__toggle:focus-visible {
  position: relative;
  z-index: 2;
  outline: 3px solid rgba(27, 135, 144, 0.34);
  outline-offset: -3px;
}

.course-project-card__number {
  display: block;
  padding: 30px;
  color: var(--course-cyan-dark);
  background: var(--course-pale);
  font: 850 1rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.course-project-card__main {
  display: block;
  padding: 32px 38px 36px;
}

.course-project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: #657589;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.course-project-card__meta span + span::before {
  content: "/";
  margin-right: 18px;
  color: #a9b5bf;
}

.course-project-card__main > strong {
  display: block;
  margin: 20px 0 14px;
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 840;
  letter-spacing: -0.035em;
  line-height: 1;
}

.course-project-card__summary {
  max-width: 650px;
  margin: 0;
  color: #445669;
  font-size: 1.08rem;
  line-height: 1.65;
}

.course-project-card__action {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  gap: 12px;
  padding: 32px 28px;
  color: #536478;
  background: #f7fafb;
  font-size: 0.82rem;
  font-weight: 800;
}

.course-project-card__action-copy {
  grid-column: 1;
  grid-row: 1;
  text-align: right;
  transition-property: opacity, filter, scale;
  transition-duration: 300ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.course-project-card__action-copy--close,
.course-project-card[open] .course-project-card__action-copy--open {
  opacity: 0;
  scale: 0.25;
  filter: blur(4px);
}

.course-project-card__action-copy--open,
.course-project-card[open] .course-project-card__action-copy--close {
  opacity: 1;
  scale: 1;
  filter: blur(0);
}

.course-project-card__chevron {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--course-ink);
  transition-property: transform, background-color;
  transition-duration: 220ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.course-project-card[open] .course-project-card__chevron {
  transform: rotate(180deg);
  background: var(--course-cyan-dark);
}

.course-project-card__details {
  padding: 36px;
  border-top: 1px solid var(--course-line);
  background: #fbfdfe;
}

.course-project-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
  padding: 15px 17px;
  border-radius: 8px;
  color: #36556a;
  background: #eaf5f6;
  box-shadow: inset 0 0 0 1px rgba(17, 106, 114, 0.12);
}

.course-project-note i {
  margin-top: 4px;
  color: var(--course-cyan-dark);
}

.course-project-note p {
  margin: 0;
}

.course-brief-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(300px, 0.68fr);
  gap: 18px;
}

.course-brief-panel {
  padding: 28px;
  border-radius: 10px;
  background: #fff;
  box-shadow:
    0 0 0 1px rgba(19, 32, 51, 0.08),
    0 2px 5px rgba(19, 32, 51, 0.04);
}

.course-panel-label {
  margin: 0 0 10px;
  color: var(--course-cyan-dark);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.course-brief-panel h4,
.course-subsection-heading h4,
.course-prompt-panel h4,
.course-assessment h4 {
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 830;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.course-requirement-list {
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: requirement;
}

.course-requirement-list li {
  position: relative;
  counter-increment: requirement;
  margin-top: 18px;
  padding-left: 42px;
  color: #5a6b7d;
  line-height: 1.58;
}

.course-requirement-list li::before {
  content: counter(requirement, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--course-cyan-dark);
  font: 800 0.75rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.course-requirement-list li span {
  color: var(--course-ink);
  font-weight: 800;
}

.course-evidence-list {
  display: grid;
  gap: 17px;
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
}

.course-evidence-list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  color: #637286;
  font-size: 0.9rem;
  line-height: 1.5;
}

.course-evidence-list i {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: var(--course-cyan-dark);
  background: var(--course-pale);
}

.course-evidence-list strong {
  display: block;
  margin-bottom: 2px;
  color: var(--course-ink);
  font-weight: 800;
}

.course-reference-links,
.course-prompt-panel,
.course-assessment {
  margin-top: 22px;
  padding: 30px;
  border-radius: 10px;
  background: #fff;
  box-shadow:
    0 0 0 1px rgba(19, 32, 51, 0.08),
    0 2px 5px rgba(19, 32, 51, 0.04);
}

.course-subsection-heading {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(300px, 0.64fr);
  gap: 30px;
  align-items: end;
  margin-bottom: 22px;
}

.course-subsection-heading > p {
  margin: 0;
  color: #65768a;
}

.course-reference-links__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.course-reference-link {
  position: relative;
  min-height: 112px;
  display: grid;
  align-content: center;
  gap: 7px;
  padding: 20px;
  border: 0;
  border-radius: 8px;
  color: var(--course-ink);
  background: #f4f8fa;
  box-shadow: 0 0 0 1px rgba(19, 32, 51, 0.08);
  font-family: inherit;
  text-align: left;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.course-reference-link span {
  padding-right: 28px;
  color: var(--course-cyan-dark);
  font-size: 0.67rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-reference-link strong {
  max-width: none;
  padding-right: 34px;
  font-size: 1rem;
  line-height: 1.35;
}

.course-reference-link small {
  margin-top: auto;
  color: #718094;
  font-size: 0.76rem;
  font-weight: 700;
}

.course-reference-link i,
.course-reference-link svg {
  position: absolute;
  top: 20px;
  right: 20px;
  color: #86a7ae;
}

.course-reference-link:hover {
  transform: translateY(-3px);
  background: #ffffff;
  box-shadow: 0 10px 20px rgba(19, 32, 51, 0.1), 0 0 0 1px rgba(10, 120, 137, 0.28);
}

.course-reference-link:focus-visible {
  outline: 3px solid rgba(10, 120, 137, 0.34);
  outline-offset: 3px;
}

.course-reference-links__note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 16px 0 0;
  color: #65768a;
  font-size: 0.82rem;
}

.course-reference-links__note i,
.course-reference-links__note svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: var(--course-cyan-dark);
}

.course-prompt-panel {
  background: #edf6f7;
}

.course-prompt-panel__heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.course-copy-button {
  flex: 0 0 auto;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 15px 0 16px;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  color: #fff;
  background: var(--course-ink);
  box-shadow: 0 0 0 1px rgba(19, 32, 51, 0.08), 0 5px 14px rgba(19, 32, 51, 0.12);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  transition: scale 150ms ease-out, color 150ms ease-out, background-color 150ms ease-out, box-shadow 150ms ease-out;
}

.course-copy-button:hover {
  background: var(--course-cyan-dark);
}

.course-copy-button:active {
  scale: 0.96;
}

.course-copy-button:focus-visible {
  outline: 3px solid rgba(110, 211, 211, 0.5);
  outline-offset: 3px;
}

.course-copy-button__icons {
  position: relative;
  width: 15px;
  height: 15px;
}

.course-copy-button__icons i,
.course-copy-button__icons svg {
  position: absolute;
  inset: 0;
  transition-property: opacity, filter, scale;
  transition-duration: 300ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.course-copy-button__done-icon,
.course-copy-button__icons svg:nth-child(2),
.course-copy-button.is-copied .course-copy-button__copy-icon,
.course-copy-button.is-copied .course-copy-button__icons svg:first-child {
  opacity: 0;
  scale: 0.25;
  filter: blur(4px);
}

.course-copy-button__copy-icon,
.course-copy-button__icons svg:first-child,
.course-copy-button.is-copied .course-copy-button__done-icon,
.course-copy-button.is-copied .course-copy-button__icons svg:nth-child(2) {
  opacity: 1;
  scale: 1;
  filter: blur(0);
}

.course-prompt-panel pre {
  max-height: 480px;
  margin: 24px 0 0;
  padding: 22px;
  overflow: auto;
  border-radius: 7px;
  color: #dfeaf0;
  background: #101e31;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.09);
  white-space: pre-wrap;
}

.course-prompt-panel pre code {
  color: inherit;
  font-size: 0.82rem;
  line-height: 1.65;
}

.course-prompt-note {
  display: flex;
  gap: 10px;
  margin: 16px 0 0;
  color: #54697a;
  font-size: 0.88rem;
}

.course-prompt-note i {
  margin-top: 4px;
  color: var(--course-cyan-dark);
}

.course-assessment__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 24px;
  border-top: 1px solid var(--course-line);
}

.course-assessment__grid span {
  padding: 20px 22px 0 0;
  color: #637286;
  font-size: 0.84rem;
  line-height: 1.5;
}

.course-assessment__grid span + span {
  padding-left: 22px;
  border-left: 1px solid var(--course-line);
}

.course-assessment__grid b {
  display: block;
  margin-bottom: 5px;
  color: var(--course-ink);
  font-size: 0.92rem;
}

.course-next-projects {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-top: 18px;
  padding: 24px 30px;
  border: 1px dashed #aec4cc;
  border-radius: 8px;
  background: var(--course-pale);
}

.course-next-projects > span {
  color: var(--course-cyan-dark);
  font: 850 0.92rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.course-next-projects h3,
.course-next-projects p {
  margin: 0;
}

.course-next-projects h3 {
  font-size: 1.05rem;
  font-weight: 820;
}

.course-next-projects p {
  margin-top: 3px;
  color: #617286;
  font-size: 0.9rem;
}

.course-page a:focus-visible {
  outline: 3px solid rgba(27, 135, 144, 0.35);
  outline-offset: 4px;
}

@media (max-width: 940px) {
  .course-hero {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .course-project-card__toggle {
    grid-template-columns: 76px minmax(0, 1fr) 150px;
  }

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

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

  .course-assessment__grid span:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 720px) {
  .course-page {
    width: min(100% - 24px, 1180px);
    padding-top: 20px;
  }

  .course-hero {
    min-height: 0;
    padding-bottom: 54px;
  }

  .course-back-link {
    margin-bottom: 36px;
  }

  .course-hero h1 {
    font-size: clamp(2.75rem, 14vw, 4.2rem);
  }

  .course-hero-art {
    aspect-ratio: 1.55 / 1;
  }

  .course-principles,
  .course-projects {
    padding: 56px 0;
  }

  .course-section-heading {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .course-principle-list article,
  .course-principle-list article + article {
    min-height: 0;
    padding: 25px 0;
    border-right: 0;
    border-bottom: 1px solid var(--course-line);
  }

  .course-principle-list article:last-child {
    border-bottom: 0;
  }

  .course-principle-list h3 {
    margin-top: 20px;
  }

  .course-project-card__toggle {
    grid-template-columns: 58px minmax(0, 1fr);
    min-height: 0;
  }

  .course-project-card__number,
  .course-project-card__main,
  .course-project-card__action {
    grid-row: auto;
  }

  .course-project-card__number {
    grid-column: 1;
    grid-row: 1 / span 2;
    padding: 23px 18px;
  }

  .course-project-card__main {
    grid-column: 2;
    padding: 24px 20px 18px;
  }

  .course-project-card__main > strong {
    font-size: 2rem;
  }

  .course-project-card__action {
    grid-column: 2;
    grid-template-columns: minmax(0, 1fr) 40px;
    padding: 0 20px 22px;
    background: transparent;
  }

  .course-project-card__chevron {
    width: 40px;
    height: 40px;
  }

  .course-project-card__details {
    padding: 18px;
  }

  .course-project-card__meta span + span::before {
    display: none;
  }

  .course-brief-panel,
  .course-reference-links,
  .course-prompt-panel,
  .course-assessment {
    padding: 22px;
  }

  .course-subsection-heading {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .course-prompt-panel__heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .course-copy-button {
    width: 100%;
  }

  .course-prompt-panel pre {
    max-height: 400px;
    padding: 17px;
  }

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

  .course-assessment__grid span,
  .course-assessment__grid span + span {
    padding: 18px 0;
    border-bottom: 1px solid var(--course-line);
    border-left: 0;
  }

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

@media (prefers-reduced-motion: reduce) {
  .course-page *,
  .course-page *::before,
  .course-page *::after {
    scroll-behavior: auto !important;
  }
}