/* AI World Univers — quiet depth, original photography, complete V1 selector contract. */
:root {
  color-scheme: dark;
  --navy: #060f1b;
  --panel: #0b1c2c;
  --text: #eef3f5;
  --muted: #aebfcb;
  --gold: #dfc596;
  --cyan: #a4d2df;
  --line: #b3cfdf25;
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 106px; }
body {
  margin: 0;
  background: radial-gradient(ellipse at 78% 4%, #1832474a, transparent 37%), var(--navy);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  opacity: .38;
  background-image: radial-gradient(circle at 12% 16%, #dfc596 0 1px, transparent 1.7px), radial-gradient(circle at 82% 24%, #b6d3de 0 1px, transparent 1.7px), radial-gradient(circle at 46% 74%, #b6d3de 0 .7px, transparent 1.5px);
  background-size: 610px 780px, 810px 930px, 990px 1160px;
}
a { color: inherit; text-underline-offset: 5px; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { touch-action: manipulation; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  border: 1px solid #8db0c14f;
  border-radius: 7px;
  padding: 11px 19px;
  background: #112638;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
button:hover, .button:hover { background: #193349; border-color: #a4d2dfb3; }
button:active, .button:active { transform: translateY(1px); }
button:disabled { opacity: .58; cursor: default; transform: none; }
button:disabled:hover { background: #112638; border-color: #8db0c14f; }
.gold { border-color: var(--gold); background: var(--gold); color: #14202a; font-weight: 650; }
.gold:hover { border-color: #eed7b0; background: #eed7b0; color: #14202a; }
.wrap { width: min(1280px, calc(100% - 80px)); margin-inline: auto; }
header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: #060f1bf2;
  backdrop-filter: blur(16px);
}
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 82px; }
.brand { color: #f2f3ef; font-size: 15px; font-weight: 730; letter-spacing: .065em; text-decoration: none; white-space: nowrap; }
.brand span { color: var(--cyan); font-weight: 400; letter-spacing: .02em; }
.topbar nav { display: flex; align-items: center; gap: 28px; }
.topbar nav a { font-size: 12px; color: #c7d3da; text-decoration: none; }
.topbar nav a:hover { color: var(--gold); }
.language { display: flex; align-items: center; gap: 9px; font-size: 11px; color: var(--muted); }
.language select { width: auto; max-width: 128px; padding: 8px 10px; background: #0b1c2b; border: 1px solid #8db0c14f; border-radius: 6px; font-size: 13px; }
.skip { position: absolute; z-index: 30; left: 16px; top: -100px; padding: 12px 18px; background: #fff; color: #06111e; }
.skip:focus { top: 12px; }
.eyebrow, .world-label { color: var(--gold); font-size: 10px; font-weight: 650; line-height: 1.6; text-transform: uppercase; letter-spacing: .2em; }
.intro, .universe-intro { display: flex; justify-content: space-between; align-items: center; gap: 50px; padding: 67px 0 38px; }
.intro > div, .universe-intro > div { min-width: 0; }
.intro h1, .universe-intro h1 {
  max-width: 15ch;
  margin: 13px 0 19px;
  font-size: clamp(42px, 5.3vw, 72px);
  font-weight: 430;
  line-height: 1.04;
  letter-spacing: -.055em;
  text-wrap: balance;
}
.intro p, .universe-intro p { max-width: 66ch; margin-bottom: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.official-logo { display: block; flex: 0 0 auto; width: 236px; max-width: 100%; height: auto; object-fit: contain; border: 1px solid #b3cfdf20; border-radius: 8px; }
.showcase {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  align-items: stretch;
  min-height: 490px;
  overflow: hidden;
  border: 1px solid #97c2d22b;
  border-radius: 20px;
  background: linear-gradient(112deg, #0a1b2d, #0b2031 56%, #091725);
  box-shadow: 0 24px 70px #0000002b;
}
.showcase::before {
  content: "";
  position: absolute;
  pointer-events: none;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse at 76% 46%, #5b7b8a21, transparent 55%), linear-gradient(115deg, transparent 58%, #dfc5960c 58.1%, transparent 58.3%);
}
.showcase-copy { position: relative; z-index: 3; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; min-width: 0; padding: 55px 12px 55px 52px; }
.showcase h2 { max-width: 15ch; margin: 20px 0 15px; font-size: clamp(34px, 3.7vw, 51px); font-weight: 420; line-height: 1.09; letter-spacing: -.045em; text-wrap: balance; }
.showcase p { max-width: 42ch; margin: 5px 0 12px; color: #becbd3; font-size: 15px; line-height: 1.8; }
.slide-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 23px; }
.slide-actions + .slide-actions { gap: 8px; margin-top: 29px; }
.slide-actions #previous, .slide-actions #next { min-width: 44px; min-height: 44px; padding: 8px 12px; background: transparent; border-color: #b3cfdf35; }
.slide-actions #previous:hover, .slide-actions #next:hover { background: #ffffff09; border-color: var(--gold); }
.slide-count { align-self: center; padding-left: 10px; color: #bbcad3; font-size: 11px; font-variant-numeric: tabular-nums; letter-spacing: .16em; }
.showcase-media, .world-portal { position: relative; display: flex; align-items: center; justify-content: center; min-height: 430px; min-width: 0; padding: 54px 39px 54px 24px; isolation: isolate; }
.showcase-media::before {
  content: "";
  position: absolute;
  z-index: -2;
  width: 86%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, #bdcfd714, #7497b00a 50%, transparent 70%);
  box-shadow: 0 0 90px #7599b20c;
}
.showcase-media img, .world-visual {
  display: block;
  position: relative;
  z-index: 2;
  width: 100%;
  height: 334px;
  max-height: 76%;
  object-fit: cover;
  border: 1px solid #d4dfdf47;
  border-radius: 16px 48px 16px 48px;
  box-shadow: 0 18px 50px #0008, 0 1px 0 #dfc59640 inset;
}
.world-orbit { position: absolute; z-index: -1; width: 94%; height: 67%; border: 1px solid #d8c19828; border-radius: 50%; transform: rotate(-23deg); pointer-events: none; }
.world-orbit::before, .world-orbit::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.world-orbit::before { inset: -31px 16px; border: 1px solid #b3cfdf1f; transform: rotate(50deg); }
.world-orbit::after { inset: 12px -20px; border: 1px solid #b3cfdf13; transform: rotate(-18deg); }
.slide-caption { position: absolute; z-index: 4; bottom: 41px; left: 42px; right: 47px; width: fit-content; max-width: calc(100% - 89px); padding: 7px 11px; border: 1px solid #b3cfdf30; border-radius: 4px; background: #06111eee; color: #d2dce2; font-size: 10px; line-height: 1.5; }
.flow { display: flex; justify-content: space-between; gap: 22px; border-bottom: 1px solid var(--line); padding: 27px 0 30px; color: var(--muted); font-size: 12px; }
.flow > span { display: flex; align-items: baseline; gap: 10px; }
.flow b { color: var(--gold); font-size: 10px; font-weight: 500; font-variant-numeric: tabular-nums; }
.chapters { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(178px, 1fr); gap: 12px; overflow-x: auto; padding: 14px 2px 20px; margin: 24px -2px 0; scrollbar-width: thin; scrollbar-color: #617d91 #0a1b2a; scroll-snap-type: x proximity; overscroll-behavior-inline: contain; }
.chapter { display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: 12px; min-height: 121px; border-color: #b3cfdf24; border-radius: 9px; padding: 18px; background: linear-gradient(145deg, #14293a80, #0b192780); color: #d3dde2; font-size: 13px; line-height: 1.4; text-align: left; scroll-snap-align: start; }
.chapter .number { color: var(--gold); font-size: 10px; font-weight: 400; letter-spacing: .12em; }
.chapter:hover, .chapter[aria-pressed="true"], .chapter.active { border-color: #dfc5968c; background: linear-gradient(145deg, #253849, #0d2234); }
.studio { padding: 69px 0 40px; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 25px; margin-bottom: 27px; }
.section-head > div { min-width: 0; }
.section-head h2, .world-outcome h2 { margin: 10px 0 14px; font-size: clamp(29px, 3vw, 40px); font-weight: 440; line-height: 1.2; letter-spacing: -.04em; text-wrap: balance; }
.section-head p { max-width: 68ch; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.builder { display: grid; grid-template-columns: 1.05fr .95fr; gap: 33px; padding: 34px; border: 1px solid #b3cfdf2b; border-radius: var(--radius); background: linear-gradient(120deg, #0e2233, #0b1b2a); }
.builder > div { min-width: 0; }
.builder .wide { grid-column: 1/-1; }
.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; color: #bfccd4; font-size: 12px; }
input, select, textarea { width: 100%; min-width: 0; border: 1px solid #8babbe55; border-radius: 6px; padding: 12px 13px; background: #071624; color: var(--text); font-size: 15px; line-height: 1.5; }
input:hover, select:hover, textarea:hover { border-color: #8babbe9c; }
input::placeholder, textarea::placeholder { color: #8299aa; opacity: 1; }
textarea { resize: vertical; min-height: 114px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 17px; }
.hint { margin: 8px 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.picked { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 18px; }
.picked button { min-height: 38px; padding: 6px 11px; border-color: #9eb6c54d; background: #162e40; font-size: 11px; }
.prompt { min-height: 270px; font-size: 13px; line-height: 1.8; white-space: pre-wrap; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 15px 0; }
.actions button { font-size: 13px; }
.status { min-height: 24px; color: var(--cyan); font-size: 13px; }
.local-label { color: var(--cyan); }
.upload-preview { display: block; max-width: 160px; max-height: 110px; object-fit: contain; border-radius: 5px; }
.world-outcome { padding: 33px 0 58px; border-bottom: 1px solid var(--line); }
.world-outcome > p { max-width: 72ch; color: var(--muted); font-size: 14px; }
.outcome-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin-top: 28px; }
.outcome-card { min-width: 0; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #0b1d2c; }
.outcome-card > img { display: block; width: 100%; aspect-ratio: 16/10; object-fit: cover; border-bottom: 1px solid var(--line); }
.outcome-card figcaption { padding: 23px; }
.outcome-card h3 { margin: 0 0 11px; color: #e9eff1; font-size: 20px; font-weight: 480; line-height: 1.25; letter-spacing: -.025em; }
.outcome-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
.outcome-steps { display: grid; gap: 10px; margin: 19px 0 0; padding-left: 18px; color: #b6c7d0; font-size: 12px; line-height: 1.65; }
.outcome-steps li { padding-left: 4px; }
.outcome-steps li::marker { color: var(--gold); font-size: 10px; }
.catalog { padding: 65px 0 82px; }
.catalog h2 { margin-top: 0; }
.filters { display: grid; grid-template-columns: 1fr 300px; gap: 18px; padding: 13px 0 4px; }
.result-summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 7px 0 24px; color: var(--muted); font-size: 12px; }
.cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.card { display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 11px; background: #0c1e2e; transition: border-color .2s ease, transform .2s ease; }
.card:hover { border-color: #b3cfdf70; transform: translateY(-3px); }
.card-image { display: block; width: 100%; aspect-ratio: 16/10; object-fit: cover; background: #142b3b; border-bottom: 1px solid #b3cfdf12; }
.card-body { display: flex; flex: 1; flex-direction: column; padding: 20px; }
.card h3 { margin: 10px 0 10px; font-size: 18px; font-weight: 530; line-height: 1.3; letter-spacing: -.025em; overflow-wrap: anywhere; }
.card p { margin: 0 0 20px; color: var(--muted); font-size: 12px; line-height: 1.75; }
.card button { align-self: flex-start; margin-top: auto; min-height: 40px; padding: 8px 13px; border-color: #8babbe47; background: #112a3c; font-size: 11px; }
.category-tag { color: var(--cyan); font-size: 9px; line-height: 1.6; text-transform: uppercase; letter-spacing: .13em; }
.more-wrap { margin-top: 33px; text-align: center; }
.detail { margin: 0 0 30px; padding: 32px; border: 1px solid #d3bd9261; border-radius: 12px; background: linear-gradient(120deg, #11283b, #0c1e2d); scroll-margin-top: 105px; }
.detail-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 25px; }
.detail-head > div { min-width: 0; }
.detail h2 { margin: 10px 0; font-size: 30px; font-weight: 460; line-height: 1.2; letter-spacing: -.03em; overflow-wrap: anywhere; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 38px; }
.detail h3 { margin-bottom: 7px; color: var(--gold); font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; }
.detail p { color: #bacbd4; font-size: 14px; line-height: 1.85; }
.empty { grid-column: 1/-1; padding: 32px; border: 1px dashed #b3cfdf3b; border-radius: 10px; color: var(--muted); }
footer { padding: 36px 0 44px; border-top: 1px solid var(--line); color: var(--muted); background: #040d17; font-size: 12px; }
.footer-row { display: flex; justify-content: space-between; gap: 25px; }
footer p { max-width: 105ch; line-height: 1.8; }
.notice { color: var(--muted); font-size: 12px; }
.noscript { padding: 22px; border: 1px solid var(--line); background: #102a3f; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }
[hidden], .detail[hidden] { display: none !important; }

@media (min-width: 1001px) {
  .world-orbit { animation: world-orbit-breathe 20s ease-in-out infinite alternate; }
  @keyframes world-orbit-breathe { to { transform: rotate(-17deg) scale(1.025); opacity: .65; } }
}
@media (max-width: 1120px) {
  .wrap { width: calc(100% - 56px); }
  .topbar { gap: 18px; }
  .topbar nav { gap: 18px; }
  .showcase-copy { padding: 40px 12px 40px 35px; }
  .showcase-media { padding: 45px 28px 45px 21px; }
  .showcase-media img { height: 315px; }
  .slide-caption { left: 35px; right: 35px; max-width: calc(100% - 70px); }
  .builder { gap: 25px; padding: 27px; }
  .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .outcome-card figcaption { padding: 19px; }
}
@media (max-width: 900px) {
  .brand { font-size: 13px; }
  .topbar nav { gap: 14px; }
  .topbar nav a { font-size: 11px; }
  .language > span { display: none; }
  .intro, .universe-intro { gap: 25px; padding-top: 44px; }
  .official-logo { width: 190px; }
  .showcase { min-height: 430px; }
  .showcase h2 { font-size: 39px; }
  .showcase-copy { padding-left: 29px; }
  .showcase p { font-size: 14px; }
  .showcase-media { min-height: 380px; padding: 40px 24px 40px 16px; }
  .showcase-media img { height: 285px; }
  .slide-caption { bottom: 39px; left: 28px; right: 28px; max-width: calc(100% - 56px); }
  .outcome-grid { gap: 15px; }
  .outcome-card h3 { font-size: 18px; }
  .builder { grid-template-columns: 1fr; }
  .builder .wide { grid-column: auto; }
  .prompt { min-height: 230px; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 90px; }
  .wrap { width: calc(100% - 36px); }
  .topbar { min-height: 74px; gap: 15px; }
  .topbar nav { display: none; }
  .brand { font-size: 14px; }
  .language select { max-width: 116px; }
  .intro, .universe-intro { gap: 24px; padding: 36px 0 28px; }
  .intro h1, .universe-intro h1 { margin-top: 12px; font-size: clamp(38px, 7vw, 52px); }
  .intro p, .universe-intro p { font-size: 14px; }
  .official-logo { width: 160px; }
  .showcase { grid-template-columns: 1fr; min-height: auto; border-radius: 15px; }
  .showcase-copy { padding: 32px 30px 14px; }
  .showcase h2 { max-width: 19ch; margin-top: 15px; font-size: clamp(34px, 6vw, 43px); }
  .showcase p { max-width: 56ch; }
  .showcase-media { min-height: 0; padding: 28px 34px 45px; }
  .showcase-media img { height: auto; max-height: none; aspect-ratio: 16/10; border-radius: 13px 35px 13px 35px; }
  .world-orbit { width: 91%; height: 77%; }
  .world-orbit::before { inset: -18px 18px; }
  .slide-caption { bottom: 28px; left: 48px; right: 48px; max-width: calc(100% - 96px); font-size: 9px; }
  .slide-actions { margin-top: 18px; }
  .slide-actions + .slide-actions { margin-top: 20px; }
  .flow { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 20px; padding: 24px 0; }
  .chapters { grid-auto-columns: 165px; margin-top: 20px; }
  .chapter { min-height: 112px; padding: 16px; }
  .studio { padding-top: 44px; }
  .section-head { margin-bottom: 24px; }
  .section-head p { font-size: 14px; }
  .builder { padding: 23px; gap: 22px; }
  .outcome-grid { grid-template-columns: 1fr; gap: 22px; }
  .outcome-card { display: grid; grid-template-columns: .9fr 1.1fr; }
  .outcome-card > img { height: 100%; aspect-ratio: auto; border-bottom: 0; border-right: 1px solid var(--line); }
  .outcome-card figcaption { padding: 23px; }
  .world-outcome { padding-top: 24px; padding-bottom: 42px; }
  .catalog { padding-top: 44px; padding-bottom: 58px; }
  .filters { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .card-body { padding: 18px; }
  .detail { padding: 24px; }
  .detail-grid { grid-template-columns: 1fr; gap: 5px; }
  .footer-row { flex-direction: column; gap: 15px; }
}
@media (max-width: 520px) {
  .wrap { width: calc(100% - 32px); }
  .topbar { min-height: 72px; flex-wrap: wrap; row-gap: 9px; padding: 10px 0; }
  .brand { font-size: 12px; letter-spacing: .025em; }
  .brand span { letter-spacing: -.025em; }
  .language select { max-width: 105px; padding: 8px; font-size: 12px; }
  .intro, .universe-intro { display: block; padding-top: 30px; }
  .intro h1, .universe-intro h1 { max-width: 13ch; font-size: 44px; }
  .intro p, .universe-intro p { margin-top: 16px; }
  .official-logo { width: 180px; margin-top: 25px; }
  .showcase-copy { padding: 29px 24px 12px; }
  .showcase h2 { font-size: 36px; }
  .showcase-media { padding: 26px 26px 37px; }
  .showcase-media img { aspect-ratio: 4/3; }
  .slide-caption { bottom: 24px; left: 38px; right: 38px; max-width: calc(100% - 76px); }
  .flow { gap: 13px 12px; font-size: 11px; }
  .flow > span { gap: 7px; }
  .eyebrow, .world-label { font-size: 9px; letter-spacing: .16em; }
  .section-head h2, .world-outcome h2 { font-size: 30px; }
  .builder { padding: 20px; border-radius: 12px; }
  .field-row, .filters { grid-template-columns: 1fr; gap: 0; }
  input, select, textarea { font-size: 16px; }
  .actions { gap: 9px; }
  .actions button { font-size: 12px; padding-inline: 14px; }
  .outcome-card { display: block; }
  .outcome-card > img { height: auto; aspect-ratio: 16/10; border-right: 0; border-bottom: 1px solid var(--line); }
  .outcome-card figcaption { padding: 22px; }
  .outcome-card h3 { font-size: 21px; }
  .cards { grid-template-columns: 1fr; gap: 21px; }
  .card-image { aspect-ratio: 16/9; }
  .card h3 { font-size: 21px; }
  .card p { font-size: 13px; }
  .card-body { padding: 21px; }
  .card button { font-size: 12px; }
  .detail { padding: 20px; }
  .detail-head { gap: 12px; }
  .detail-head button { min-width: 42px; padding: 9px; }
  .detail h2 { font-size: 27px; }
  .result-summary { align-items: flex-start; font-size: 11px; }
}
@media (max-width: 359px) {
  .wrap { width: calc(100% - 28px); }
  .brand { max-width: 162px; white-space: normal; line-height: 1.45; }
  .brand span { display: block; }
  .intro h1, .universe-intro h1 { font-size: 39px; }
  .showcase-copy { padding-inline: 21px; }
  .showcase h2 { font-size: 32px; }
  .showcase-media { padding-inline: 22px; }
  .slide-caption { left: 31px; right: 31px; max-width: calc(100% - 62px); }
  .flow { grid-template-columns: 1fr; }
  .builder { padding: 17px; }
  .result-summary { flex-direction: column; gap: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .card:hover, button:active, .button:active { transform: none; }
}

/* Premium Showcase v3: a quiet static studio and clear learning paths. */
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