@font-face {
  font-family: 'Course Noto';
  src: url('./fonts/course-noto-regular.woff2') format('woff2');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Course Noto';
  src: url('./fonts/course-noto-bold.woff2') format('woff2');
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: light;
  --blue: #064bfa;
  --white: #ffffff;
  --ink: #111723;
  --muted: #546078;
  --green: #00c98d;
  --green-ink: #006347;
  --green-wash: #e4faf1;
  --line: #d9e1f1;
  --wash: #f4f7ff;
  --ease: cubic-bezier(.16, 1, .3, 1);
  font-family: 'Course Noto', 'Noto Sans SC', sans-serif;
  color: var(--ink);
  background: var(--white);
  font-synthesis: none;
  scrollbar-color: #9baed6 var(--wash);
  scrollbar-width: thin;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 280px; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; text-underline-offset: .2em; -webkit-tap-highlight-color: transparent; }
::selection { background: var(--green); color: #002b80; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }

.page-shell { width: min(100% - 96px, 1248px); margin-inline: auto; }
.page-header { padding-block: 52px 38px; border-bottom: 2px solid var(--blue); }
h1 { color: var(--blue); font-size: clamp(32px, 4.4vw, 60px); line-height: 1.35; font-weight: 700; letter-spacing: -.025em; text-wrap: balance; }
.course-motto { margin-top: 16px; font-size: 20px; line-height: 1.7; }

.directory-heading { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 12px 24px; margin-block: 30px 20px; }
h2 { font-size: 22px; line-height: 1.5; font-weight: 700; }
.directory-summary { display: flex; align-items: baseline; gap: 8px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.directory-summary strong { color: var(--ink); font-variant-numeric: tabular-nums; }
.available-count { color: var(--green-ink); }
.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; list-style: none; padding: 0; margin: 0; }
.course-grid > li { min-width: 0; display: flex; }
.course-card { display: flex; flex-direction: column; width: 100%; min-height: 268px; padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
.course-card--available { border-color: #afc4ff; transition: border-color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.course-heading { display: flex; align-items: center; gap: 14px; min-width: 0; }
.course-number { color: var(--blue); font-size: 34px; font-weight: 700; line-height: 1; letter-spacing: -.035em; font-variant-numeric: tabular-nums; }
.course-name { font-size: 18px; line-height: 1.5; font-weight: 700; white-space: nowrap; }
.course-status { flex: none; display: inline-flex; align-items: center; gap: 6px; font-size: 12px; line-height: 1.5; color: var(--muted); }
.course-status--available { color: var(--green-ink); background: var(--green-wash); padding: 5px 9px; border-radius: 6px; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.course-topic { color: var(--blue); font-size: 20px; line-height: 1.55; font-weight: 700; overflow-wrap: anywhere; }
.course-description { margin-top: 10px; font-size: 15px; line-height: 1.8; color: var(--muted); overflow-wrap: anywhere; }
.card-action { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 18px; margin-top: auto; color: var(--blue); font-size: 14px; line-height: 1.5; font-weight: 700; }
.action-destination { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 400; }
.action-destination svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.page-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-block: 26px 36px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 12px 18px; background: var(--blue); color: var(--white); border-radius: 6px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

@media (hover: hover) {
  .course-card--available:hover { border-color: var(--blue); background: var(--wash); transform: translateY(-3px); }
}
.course-card--available:active { transform: translateY(0); background: var(--wash); }

@media (max-width: 1050px) {
  .page-shell { width: calc(100% - 64px); }
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-header { padding-block: 40px 30px; }
}

@media (max-width: 600px) {
  .page-shell { width: calc(100% - 40px); }
  .page-header { padding-block: 32px 26px; }
  h1 { font-size: clamp(29px, 7.8vw, 44px); letter-spacing: -.03em; }
  .course-motto { font-size: 15px; margin-top: 12px; }
  .directory-heading { margin-block: 26px 18px; gap: 8px; }
  h2 { font-size: 20px; }
  .directory-summary { font-size: 12px; gap: 5px; }
  .course-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .course-card { min-height: 240px; padding: 22px; }
  .course-number { font-size: 32px; }
  .course-heading { gap: 12px; }
  .page-footer { flex-direction: column; padding-block: 24px 32px; }
}

@media (prefers-reduced-motion: reduce) {
  .course-card--available { transition: none; }
  .course-card--available:hover { transform: none; }
}

@media (forced-colors: active) {
  .course-card { border-color: CanvasText; }
  .course-card--available { color: LinkText; }
  .course-status--available { outline: 1px solid CanvasText; }
}