* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-height: 100svh; display: flex; flex-direction: column; background: var(--background); color: var(--foreground); font: 16px/1.7 var(--font-geist-sans); }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--ring); outline-offset: 6px; }
.wrap { width: min(1120px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: absolute; left: 24px; top: -80px; padding: 8px 16px; background: var(--card); z-index: 2; }
.skip-link:focus { top: 12px; }
.site-header { min-height: 100px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 650; letter-spacing: -.5px; }
.brand-icon { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid #527d73; border-radius: 12px; color: #a6edcf; background: #17372f; font: 700 27px Georgia, serif; }
.brand small { margin-left: 14px; color: var(--muted-foreground); font-size: 13px; font-weight: 400; letter-spacing: 1px; }
.header-note, .eyebrow, .section-heading > span, .site-footer, .art-label, .art-footer { font-size: 11px; letter-spacing: 1.7px; color: var(--muted-foreground); }
main { flex: 1; padding-block: 62px 64px; }
.intro { margin-bottom: 46px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 21px; color: #a6d1bf; }
.eyebrow span { width: 6px; height: 6px; background: #a6edcf; border-radius: 50%; }
h1 { margin: 0; font-size: clamp(40px, 4.2vw, 60px); font-weight: 600; line-height: 1.3; letter-spacing: -2px; }
h1 > span { color: #a6edcf; }
.intro-text { margin: 20px 0 0; font-size: 15px; line-height: 1.9; color: var(--muted-foreground); }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 16px; gap: 16px; }
.section-heading h2 { margin: 0; font-size: 15px; font-weight: 500; }
.course-card { display: grid; grid-template-columns: 1.45fr 1fr; overflow: hidden; border: 1px solid #36544f; border-radius: 18px; background: var(--card); transition: border-color .2s, transform .2s; }
.course-card:hover { border-color: var(--ring); transform: translateY(-3px); }
.course-info { padding: 30px 36px; }
.course-code { margin: 0 0 14px; font: 500 13px var(--font-geist-mono); letter-spacing: 1.8px; color: #a6edcf; }
.course-code span { margin-left: 10px; padding-left: 12px; border-left: 1px solid var(--border); color: var(--muted-foreground); font-size: 11px; }
.course-info h3 { margin: 0; font-size: 29px; font-weight: 550; letter-spacing: -.8px; }
.course-english { margin: 3px 0 16px; color: #b3c5d0; font-size: 13px; }
#course-description { margin: 0; color: var(--muted-foreground); font-size: 14px; line-height: 1.9; }
.features { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 26px; padding: 0; list-style: none; }
.features li { padding: 3px 10px; border: 1px solid var(--border); border-radius: 5px; color: #b7cbd5; font-size: 11px; }
.course-action { display: inline-flex; align-items: center; gap: 28px; color: #a6edcf; font-size: 14px; font-weight: 600; }
.course-action > span { font-size: 22px; font-weight: 400; }
.course-art { display: flex; flex-direction: column; justify-content: center; padding: 30px 35px; color: #71ac96; border-left: 1px solid #29453f; background: radial-gradient(ellipse at 85% 30%, #244c3c66, transparent 65%), repeating-linear-gradient(0deg, transparent 0 31px, #73ae9b09 31px 32px), repeating-linear-gradient(90deg, transparent 0 31px, #73ae9b09 31px 32px), #102721; }
.art-label { font-size: 9px; color: #8ab5a3; }
.course-art strong { display: flex; align-items: baseline; justify-content: space-between; font: 400 clamp(55px, 7.5vw, 103px)/1.5 var(--font-geist-mono); letter-spacing: -8px; color: #b2e6ce; }
.course-art strong span { font: 300 40px/1 var(--font-geist-sans); letter-spacing: 0; color: #73ae9b; }
.course-art svg { width: 100%; max-width: 250px; height: 64px; margin: 8px 0 24px; }
.course-art circle { fill: #142e27; stroke: currentColor; }
.art-footer { font-size: 10px; letter-spacing: 1px; color: #8ab5a3; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 23px; border-top: 1px solid var(--border); font-size: 10px; }
@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { min-height: 80px; }
  .header-note { display: none; }
  main { padding-block: 40px; }
  .intro { margin-bottom: 36px; }
  h1 { font-size: 42px; letter-spacing: -1px; }
  .eyebrow { font-size: 9px; letter-spacing: 1px; }
  .section-heading > span { font-size: 8px; letter-spacing: .7px; }
  .course-card { grid-template-columns: 1fr; }
  .course-info { padding: 27px 24px; }
  .course-info h3 { font-size: 26px; }
  .course-art { border-left: 0; border-top: 1px solid #29453f; padding: 22px 24px; }
  .course-art strong { font-size: 72px; line-height: 1.3; letter-spacing: -5px; }
  .course-art svg, .art-footer { display: none; }
  .desktop-break { display: none; }
  .site-footer { flex-wrap: wrap; gap: 4px 20px; letter-spacing: 1px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .course-card { transition: none; } }