@import 'tailwindcss';

:root {
  color-scheme: dark;
  color: #f7f4ff;
  background: #0b0713;
  font-family: var(--reader-font-family, Calibri, Arial, sans-serif);
  font-size: max(var(--reader-font-min-size, 16px), 17px);
  font-synthesis: none;
  --text: #f7f4ff;
  --muted: #c8bdd7;
  --accent: #c4ff60;
  --accent-soft: #cfafff;
  --line: rgba(224, 210, 244, .2);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body { margin: 0; min-height: 100vh; line-height: 1.5; background: #0b0713; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
::selection { color: #151020; background: var(--accent); }
.shell { width: min(100% - 3rem, 1160px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 20; top: 1rem; left: 1rem; padding: .8rem 1.2rem; color: #0b0713; background: white; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
.course-page { min-height: 100vh; overflow: clip; background: radial-gradient(circle at 78% 15%, rgba(132, 55, 179, .24), transparent 34rem), radial-gradient(circle at 18% 52%, rgba(75, 140, 160, .11), transparent 28rem), #0b0713; }

.site-header { height: 104px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .8rem; }
.brand-mark { display: grid; place-items: center; width: 50px; height: 50px; padding: 4px; background: white; border-radius: 50%; }
.brand-mark img { width: 100%; height: auto; display: block; border-radius: 50%; }
.brand-name { font-size: 1.05rem; letter-spacing: .02em; line-height: 1.05; }
.brand-name strong { font-weight: 650; }
.brand-name span { display: block; margin-top: .42rem; color: var(--muted); font-size: .66rem; letter-spacing: .09em; }
.header-link { display: inline-flex; gap: .8rem; align-items: center; color: var(--muted); font-size: .84rem; }
.header-link span { color: var(--accent); font-size: 1.25rem; }

.hero { position: relative; min-height: 650px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .78fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); padding-block: clamp(4rem, 9vw, 7rem); }
.hero::before { content: ''; position: absolute; width: 11rem; height: 11rem; left: -7rem; top: 6rem; border: 1px solid rgba(196,255,96,.28); border-radius: 50%; box-shadow: 0 0 0 38px rgba(196,255,96,.025), 0 0 0 76px rgba(196,255,96,.018); }
.eyebrow { display: flex; align-items: center; gap: .7rem; margin: 0 0 1.3rem; color: var(--accent); font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.status-dot { width: .52rem; height: .52rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 6px rgba(196,255,96,.1); }
.hero h1 { max-width: 720px; margin: 0; font-size: clamp(3.6rem, 8vw, 7.4rem); font-weight: 530; letter-spacing: -.065em; line-height: .88; }
.hero h1 span { display: block; color: var(--accent-soft); }
.hero-description { max-width: 580px; margin: 2rem 0 0; color: var(--muted); font-size: clamp(1.06rem, 1.7vw, 1.38rem); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .8rem; min-height: 50px; padding: .85rem 1.25rem; border: 1px solid var(--line); border-radius: 999px; font-weight: 650; font-size: .88rem; }
.button-primary { color: #13101b; background: var(--accent); border-color: var(--accent); }
.button-secondary { background: rgba(255,255,255,.03); }
.hero-card { position: relative; margin: 0; padding: .7rem; border: 1px solid var(--line); background: rgba(255,255,255,.035); border-radius: 1.5rem; box-shadow: 0 34px 100px rgba(0,0,0,.34); transform: rotate(1.2deg); }
.hero-card img { display: block; width: 100%; height: auto; border-radius: 1rem; }
.hero-card figcaption { padding: .9rem .45rem .35rem; color: var(--muted); font-size: .76rem; }

.catalog { padding-block: 5rem 7rem; border-top: 1px solid var(--line); }
.catalog-heading { display: grid; grid-template-columns: 1fr minmax(260px, .55fr); gap: 2rem; align-items: end; margin-bottom: 2.5rem; }
.catalog-heading h2 { margin: 0; max-width: 660px; font-size: clamp(2.4rem, 5vw, 4.5rem); font-weight: 520; letter-spacing: -.04em; line-height: 1; }
.catalog-heading > p { margin: 0; color: var(--muted); line-height: 1.65; }
.topic-grid { list-style: none; margin: 0; padding: 0; }
.topic-card { display: grid; grid-template-columns: 72px minmax(0, 1fr) auto; gap: 1.5rem; align-items: center; min-height: 190px; padding: 2rem; border: 1px solid var(--line); border-radius: 1.4rem; background: linear-gradient(135deg, rgba(255,255,255,.055), rgba(255,255,255,.02)); transition: border-color .2s ease, transform .2s ease, background .2s ease; }
.topic-card:hover { transform: translateY(-3px); border-color: rgba(196,255,96,.48); background: linear-gradient(135deg, rgba(196,255,96,.08), rgba(255,255,255,.025)); }
.topic-number { align-self: start; color: var(--accent); font-size: .78rem; letter-spacing: .14em; }
.topic-copy h3 { margin: 0; font-size: clamp(1.55rem, 3vw, 2.3rem); font-weight: 540; letter-spacing: -.025em; }
.topic-copy p { max-width: 720px; margin: .75rem 0 0; color: var(--muted); }
.topic-arrow { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; color: #130e1d; background: var(--accent); font-size: 1.35rem; }
.future-note { margin: 1.2rem 0 0; color: var(--muted); font-size: .8rem; }
.site-footer { min-height: 110px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
.site-footer a { color: var(--text); }

@media (max-width: 800px) {
  .shell { width: min(100% - 2rem, 1160px); }
  .site-header { height: 88px; }
  .header-link { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 4rem; }
  .hero-card { width: min(100%, 560px); transform: none; }
  .catalog-heading { grid-template-columns: 1fr; }
  .topic-card { grid-template-columns: 48px minmax(0, 1fr); padding: 1.35rem; }
  .topic-arrow { display: none; }
  .site-footer { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .topic-card { transition: none; }
}