/* Course catalogue: supplied 0910-03 layout; scoped to the home page section. */
.course-tracks {
  padding: 64px 0 112px;
  color: #f3f3f5;
  background:
    radial-gradient(ellipse at 96% 17%, rgba(83, 19, 25, .17), transparent 47%),
    radial-gradient(ellipse at 0% 80%, rgba(14, 31, 66, .17), transparent 47%),
    #050506;
}
.course-tracks .tracks-container { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.course-tracks .tracks-head { margin-bottom: 76px; text-align: center; }
.course-tracks .tracks-title { font-size: 38px; line-height: 1.4; letter-spacing: -1.5px; font-weight: 400; }
.course-tracks .tracks-title strong { font-weight: 700; }
.course-tracks .track-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 28px; }
.course-tracks .track-legend a { display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 6px 14px; border: 1px solid #26252a; border-radius: 999px; color: #c5c5d0; font-size: 12px; font-weight: 700; transition: border-color .18s, background-color .18s; }
.course-tracks .track-legend a:hover { border-color: #71717a; background: #19191e; }
.course-tracks .track-legend i { flex: 0 0 8px; width: 8px; height: 8px; border-radius: 50%; background: #00b7d8; }
.course-tracks .track-legend a[href="#track-infra"] i { background: #ff8a18; }
.course-tracks .track-legend a[href="#track-prod"] i { background: #b555ef; }
.course-tracks .track-group { scroll-margin-top: 10px; }
.course-tracks .track-group + .track-group { margin-top: 72px; }
.course-tracks .track-group-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px 20px; align-items: center; padding: 0 10px 20px; border-bottom: 1px solid #232327; }
.course-tracks .track-group-title { margin: 0; font-size: 24px; line-height: 1.4; font-weight: 700; letter-spacing: -.7px; }
.course-tracks .track-group-count { grid-column: 2; grid-row: 1 / 3; color: #9696a3; font-size: 13px; }
.course-tracks .track-group-desc { grid-column: 1; font-size: 14px; line-height: 1.6; color: #9999aa; }
.course-tracks .track-grid { display: grid; gap: 20px; margin-top: 28px; align-items: stretch; }
.course-tracks .cols-3, .course-tracks .cols-4, .course-tracks .cols-2 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
/* Every course uses the same column width and content space, including partial rows. */
.course-tracks .track-card { --tag-color: #00bd83; --tag-bg: #08291f; display: flex; flex-direction: column; min-width: 0; padding: 14px 14px 0; border: 1px solid #252527; border-radius: 22px; background: rgba(18, 18, 20, .8); transition: border-color .18s, background-color .18s; }
.course-tracks .track-card[href] { cursor: pointer; }
.course-tracks .track-card[href]:is(:hover, :focus-visible) { border-color: #51515e; background-color: #151518; }
.course-tracks .track-card[href]:focus-visible { outline: 2px solid #80bfff; outline-offset: 5px; }
.course-tracks .track-visual { flex: 0 0 auto; overflow: hidden; aspect-ratio: 16 / 9; border-radius: 14px; background: #08080d; }
.course-tracks .track-visual img { width: 100%; height: 100%; object-fit: cover; }
.course-tracks .track-body { flex: 1; min-height: 190px; padding: 16px 8px 0; }
.course-tracks .track-body h4 { margin: 0; font-size: 18px; line-height: 1.5; font-weight: 700; letter-spacing: -.55px; }
.course-tracks .track-ai-label { display: block; }
.course-tracks .track-date { margin-top: 4px; color: #aaaabb; font-size: 13px; line-height: 1.6; letter-spacing: -.25px; }
.course-tracks .track-tags { display: flex; flex-wrap: wrap; gap: 6px 4px; list-style: none; padding: 0; margin: 12px 0 0; }
.course-tracks .track-tags li { white-space: nowrap; padding: 4px 13px; border-radius: 999px; background: var(--tag-bg); color: var(--tag-color); font-size: 12px; font-weight: 700; line-height: 1.5; }
.course-tracks .track-btn { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 76px; margin: 20px 8px 0; border-top: 1px solid #252527; border-radius: 12px 12px 0 0; font-size: 14px; font-weight: 700; white-space: nowrap; }
.course-tracks .track-card[href]:is(:hover, :focus-visible) .track-btn { color: #fff; text-decoration: none; }
.course-tracks .track-card[href]:active { opacity: .8; }
.course-tracks .arr { font-style: normal; font-size: 20px; line-height: 1; }
.course-tracks .track-btn-closed { color: #b7b7c0; }
.course-tracks .t-fe { --tag-color: #20c8e6; --tag-bg: #082b34; }
.course-tracks .t-be { --tag-color: #a89cff; --tag-bg: #242039; }
.course-tracks .t-ai { --tag-color: #ff7276; --tag-bg: #381517; }
.course-tracks .t-sec { --tag-color: #849cff; --tag-bg: #141f40; }
.course-tracks .t-cn { --tag-color: #ffaa46; --tag-bg: #35200d; }
.course-tracks .t-pd { --tag-color: #ca91ff; --tag-bg: #2c1e3b; }
.course-tracks .t-pm { --tag-color: #ef80b7; --tag-bg: #351b2c; }
@media (max-width: 1100px) {
  .course-tracks .tracks-title { font-size: 32px; }
  .course-tracks .cols-3, .course-tracks .cols-4, .course-tracks .cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .course-tracks { padding: 56px 0 72px; }
  .course-tracks .tracks-container { width: calc(100% - 40px); }
  .course-tracks .tracks-title { font-size: 27px; line-height: 1.5; letter-spacing: -1px; }
  .course-tracks .tracks-title strong { display: inline-block; }
  .course-tracks .tracks-head { margin-bottom: 48px; }
  .course-tracks .track-legend { gap: 6px; margin-top: 24px; }
  .course-tracks .track-legend a { min-height: 40px; padding-inline: 11px; font-size: 11px; }
  .course-tracks .track-group-head { padding: 0 0 18px; gap: 10px 12px; }
  .course-tracks .track-group-title { font-size: 22px; }
  .course-tracks .track-group-count { grid-row: 1; font-size: 12px; }
  .course-tracks .track-group-desc { grid-column: 1 / -1; font-size: 13px; }
  .course-tracks .track-grid { grid-template-columns: minmax(0, 1fr); gap: 18px; margin-top: 22px; }
  .course-tracks .track-group + .track-group { margin-top: 48px; }
  .course-tracks .track-btn { min-height: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  .course-tracks .track-legend a, .course-tracks .track-card { transition: none; }
}