:root {
  color-scheme: dark;
  --background: #000000;
  --text: #ffffff;
  --muted: #8c8c8c;
  --line: #292929;
  --line-strong: #464646;
  --gutter: clamp(1.25rem, 3.2vw, 3rem);
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--background);
}

body {
  min-width: 20rem;
  min-height: 100%;
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
}

h1,
h2,
p {
  margin: 0;
}

.page-shell {
  width: min(100%, 96rem);
  min-height: 100svh;
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(3rem, 6vw, 6rem);
}

.site-header {
  min-height: 5.25rem;
  border-bottom: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

main {
  width: min(100%, 64rem);
  margin: 0 auto;
}

.wordmark,
.page-name {
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  text-underline-offset: 0.26em;
}

.wordmark:hover,
.wordmark:focus-visible,
.page-name:hover,
.page-name:focus-visible {
  color: var(--muted);
}

h1 {
  padding-block: clamp(2.5rem, 3vw, 3.25rem) clamp(1.6rem, 2vw, 2rem);
  font-size: clamp(3.25rem, 4.3vw, 4.5rem);
  font-weight: 400;
  line-height: 0.94;
  letter-spacing: -0.065em;
}

h2 {
  font-size: clamp(1.2rem, 1.75vw, 1.6rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.certificate-link {
  display: block;
  margin-top: 0.75rem;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  line-height: 0;
  transition: border-color 160ms ease, opacity 160ms ease;
}

.certificate-link:hover,
.certificate-link:focus-visible {
  border-color: var(--text);
  opacity: 0.88;
}

.certificate-link img {
  display: block;
  width: 100%;
  height: auto;
}

.courses {
  padding-top: clamp(2.7rem, 4vw, 4.25rem);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.section-heading p {
  color: var(--muted);
  font-size: clamp(0.95rem, 1.15vw, 1.05rem);
  letter-spacing: -0.02em;
}

.course-list {
  margin: 0.8rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.course-row {
  min-height: 3.65rem;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr) 7rem 4rem;
  gap: clamp(0.75rem, 2vw, 2rem);
  align-items: center;
  font-size: clamp(0.98rem, 1.25vw, 1.13rem);
  line-height: 1.35;
  letter-spacing: -0.022em;
}

.course-row a {
  width: fit-content;
  max-width: 100%;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.26em;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.course-row a:hover,
.course-row a:focus-visible {
  color: var(--muted);
  text-decoration-color: currentColor;
}

.course-number,
.course-kind,
.course-duration {
  color: var(--muted);
}

.course-duration {
  text-align: right;
}

@media (max-width: 48rem) {
  .site-header {
    min-height: 4.5rem;
  }

  h1 {
    padding-block: 3rem 2.25rem;
    font-size: clamp(3.7rem, 17vw, 5.25rem);
  }

  .certificate-link {
    margin-inline: calc(var(--gutter) * -1);
    border-inline: 0;
  }

  .course-row {
    min-height: 5.4rem;
    grid-template-columns: 2.5rem minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    gap: 0.25rem 0.75rem;
    padding-block: 0.9rem;
  }

  .course-number {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
    padding-top: 0.1rem;
  }

  .course-row a {
    grid-column: 2 / span 2;
    grid-row: 1;
  }

  .course-kind {
    grid-column: 2;
    grid-row: 2;
  }

  .course-duration {
    grid-column: 3;
    grid-row: 2;
  }
}

@media (max-width: 27rem) {
  h1 {
    font-size: clamp(3.45rem, 16.5vw, 4.5rem);
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .certificate-link,
  .course-row a {
    transition: none;
  }
}