:root {
  color-scheme: dark;
  --bg: #0a1322;
  --surface: #111e30;
  --stroke: #304157;
  --text: #f3f7fb;
  --muted: #b0bfd0;
  --accent: #76e6ce;
  --serif: Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 280px; font-family: var(--sans); color: var(--text); background: radial-gradient(ellipse at 70% 2%, #182d43 0, var(--bg) 46rem); line-height: 1.55; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
section[id] { scroll-margin-top: 1.25rem; }
.shell { width: min(1100px, calc(100% - 3rem)); margin-inline: auto; }
.skip { position: absolute; top: 1rem; left: 1rem; z-index: 5; transform: translateY(-200%); background: var(--accent); color: var(--bg); padding: .6rem 1rem; }
.skip:focus { transform: none; }
.top { display: flex; align-items: center; justify-content: space-between; min-height: 76px; border-bottom: 1px solid var(--stroke); gap: .7rem; }
.wordmark { display: flex; align-items: center; gap: .7rem; text-decoration: none; font-size: .8rem; letter-spacing: .13em; }
.wordmark strong { color: var(--accent); }
nav { display: flex; gap: .9rem; }
nav a, .foot a { text-decoration-color: #71899f; text-underline-offset: .25rem; color: var(--muted); padding-block: .55rem; }
nav a:hover, .foot a:hover { color: var(--text); }
.hero { min-height: 510px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; padding: 3.2rem 0 3.6rem; overflow: hidden; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { font: 650 .75rem/1.4 var(--sans); letter-spacing: .13em; color: var(--accent); margin: 0 0 .8rem; }
.pulse { display: inline-block; width: .45rem; height: .45rem; margin: 0 .35rem .07rem 0; background: var(--accent); border-radius: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -.04em; }
h1 { font-size: clamp(3.6rem, 7.4vw, 6.5rem); line-height: .98; margin-bottom: 1.35rem; }
h1 em { color: var(--accent); font-weight: inherit; }
h2 { font-size: clamp(2rem, 4.4vw, 3.6rem); line-height: 1.05; margin-bottom: 1rem; }
.hero-text { max-width: 30rem; font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--muted); margin-bottom: 1.7rem; }
.hero-art { position: relative; display: grid; place-items: center; min-height: 400px; isolation: isolate; }
.hero-art img { width: clamp(152px, 20vw, 242px); border: 1px solid #608197; border-radius: .48rem; box-shadow: 0 18px 65px #01060fca; transform: rotate(8deg) translate(10px,-5px); }
.orbit { position: absolute; z-index: -1; width: 89%; max-width: 438px; aspect-ratio: 1; border: 1px solid #547d9480; border-radius: 50%; }
.orbit-a { transform: scale(.98,.85) rotate(-18deg); }
.orbit-b { transform: scale(.76,.72) rotate(38deg); }
.orbit-c { transform: scale(.90,.48) rotate(-28deg); }
.orbit-cross { z-index: -1; position: absolute; width: 96%; height: 73%; background: radial-gradient(circle, #acdae6 0 1px, transparent 1.5px) 0 0/51px 57px; opacity: .35; mask-image: radial-gradient(ellipse, black 22%, transparent 74%); }
.art-note { position: absolute; bottom: .7rem; right: .7rem; color: var(--muted); letter-spacing: .13em; font-size: .68rem; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: .85rem; padding: .68rem .98rem; min-height: 44px; text-decoration: none; border: 1px solid transparent; border-radius: .6rem; font-weight: 700; font-size: .92rem; }
.primary { background: var(--accent); color: #082820; }
.primary:hover { background: #a5f2e1; }
.outline { border-color: #5a738b; background: #19283a; color: var(--text); }
.outline:hover { border-color: var(--accent); }
.feature { display: grid; grid-template-columns: minmax(150px, .78fr) minmax(0, 1.3fr); border: 1px solid var(--stroke); border-radius: 1.1rem; overflow: hidden; background: var(--surface); }
.feature-art { min-height: 258px; display: grid; place-items: center; padding: 1.65rem; background: repeating-radial-gradient(ellipse at 50% 50%, transparent 0 26px, #35556b55 27px 28px), #16263a; }
.feature-art img { width: min(153px, 100%); border: 1px solid #537387; border-radius: .32rem; box-shadow: 0 12px 33px #03070f9e; }
.feature-copy { padding: clamp(1.25rem, 4vw, 2.7rem); align-self: center; }
.feature-copy p:not(.eyebrow), .section-head > p, .card p:not(.eyebrow), .card li, .foot, small { color: var(--muted); }
.feature-copy p { max-width: 40rem; }
small { display: block; margin-top: .75rem; font-size: .82rem; }
.shelf { padding: 4.4rem 0; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.6rem; margin-bottom: 1.25rem; }
.section-head h2 { margin-bottom: .2rem; }
.section-head > p { max-width: 26ch; margin-bottom: .35rem; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.1rem; }
.card { min-width: 0; border: 1px solid var(--stroke); border-radius: .85rem; overflow: hidden; background: var(--surface); display: flex; flex-direction: column; }
.card-cover { padding: 1.2rem; display: grid; place-items: center; background: radial-gradient(ellipse, #28425a, #132136 73%); border-bottom: 1px solid var(--stroke); }
.card-cover img { width: 131px; border: 1px solid #557286; border-radius: .25rem; box-shadow: 0 8px 25px #0009; }
.card-body { display: flex; flex-direction: column; flex: 1; padding: 1.25rem; }
.card h3 { font-size: 1.65rem; line-height: 1.08; margin-bottom: .65rem; }
.card-body p { font-size: .95rem; }
.card .button { align-self: flex-start; margin-top: auto; }
.card .purchase-link { margin-top: .6rem; }
.bundle .purchase-link { margin: .4rem 0; }
details { margin: 0 0 1rem; font-size: .9rem; }
summary { cursor: pointer; color: var(--accent); padding: .35rem 0; }
summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
details ul { padding-left: 1.25rem; margin: .45rem 0 0; }
details li + li { margin-top: .3rem; }
.bundle .feature-art { background-color: #1b243c; }
.channel { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 3rem 0 2.2rem; }
.channel h2 { font-size: clamp(1.75rem, 3.4vw, 2.7rem); margin: 0; }
.foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .5rem 1rem; border-top: 1px solid var(--stroke); padding: 1.4rem 0 2.2rem; font-size: .82rem; }
.credits { max-width: 72ch; margin-block: 3rem; }
.credits a { color: var(--accent); text-underline-offset: .2rem; }
@media (max-width: 890px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .shell { width: calc(100% - 1.8rem); }
  .top { min-height: 64px; }
  .wordmark { font-size: .68rem; gap: .44rem; letter-spacing: .06em; }
  .wordmark img { width: 29px; }
  nav { gap: .65rem; font-size: .82rem; }
  .hero { min-height: 0; grid-template-columns: 1fr; padding: 2.4rem 0 1rem; }
  .hero-art { min-height: 262px; }
  .hero-art img { width: 135px; }
  .orbit { max-width: 290px; }
  .art-note { bottom: .4rem; }
  .feature { grid-template-columns: 1fr; }
  .feature-art { min-height: 0; padding: 1.25rem; }
  .feature-art img { width: 115px; }
  .shelf { padding: 2.7rem 0; }
  .section-head, .channel { display: block; }
  .section-head > p, .channel .button { margin-top: .8rem; }
  .grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}