:root {
  color-scheme: dark;
  --bg: #09060e;
  --surface: rgba(24, 17, 35, 0.76);
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(206, 170, 255, 0.35);
  --text: #faf6ff;
  --muted: #b6adc2;
  --accent: #b87cff;
  --accent-soft: #d8b9ff;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --card-slide-ease: cubic-bezier(.22,1.17,.36,1);
  --scroll-thumb: #b87cff;
}
* { box-sizing: border-box; scrollbar-width:auto; scrollbar-color:var(--scroll-thumb) transparent; }
*::-webkit-scrollbar { width:calc(14 * var(--ui-px, 1px)); height:calc(14 * var(--ui-px, 1px)); }
*::-webkit-scrollbar-track { border:calc(4 * var(--ui-px, 1px)) solid transparent; border-radius:calc(999 * var(--ui-px, 1px)); background:rgba(184,124,255,.06); background-clip:padding-box; margin:calc(6 * var(--ui-px, 1px)); }
*::-webkit-scrollbar-thumb { border:calc(3 * var(--ui-px, 1px)) solid transparent; border-radius:calc(999 * var(--ui-px, 1px)); background:var(--scroll-thumb); background-clip:padding-box; box-shadow:inset 0 0 calc(5 * var(--ui-px, 1px)) rgba(224,191,255,.6),0 0 calc(6 * var(--ui-px, 1px)) rgba(184,124,255,.35); }
*::-webkit-scrollbar-thumb:hover { background-color:#cf9cff; }
*::-webkit-scrollbar-corner { background:transparent; }
@supports selector(::-webkit-scrollbar) {
* { scrollbar-color:auto; }
}
html { scroll-behavior: smooth; }
body {
  position: relative;
  isolation: isolate;
  min-width: calc(320 * var(--ui-px, 1px));
  min-height: calc(100 * 1vh);
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: radial-gradient(circle at 50% 47%, rgba(112, 59, 176, 0.13), transparent 34%), var(--bg);
  font-family: "Dongyuan Song One", "Songti SC", "Noto Serif CJK SC", serif;
}
.page-artwork-backdrop {
  position: fixed;
  z-index: -3;
  inset: calc(-64 * var(--ui-px, 1px));
  overflow: hidden;
  pointer-events: none;
  background: var(--bg);
}
.page-artwork-backdrop::after {
  position: absolute;
  inset: 0;
  background: rgba(3, 3, 6, 0.68);
  content: "";
}
.page-artwork-backdrop__image {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 44%;
  opacity: 0;
  filter: none;
  transform: translateZ(0) scale(1.04);
  transition: opacity 400ms ease;
  visibility: hidden;
}
.page-artwork-backdrop__image > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 44%;
}
.page-artwork-backdrop__image.is-rendered {
  visibility: visible;
  will-change: opacity;
}
.page-artwork-backdrop__image.is-active {
  opacity: 0.82;
}
button, a { font: inherit; }
button:focus-visible,
a:focus-visible {
  outline: calc(2 * var(--ui-px, 1px)) solid var(--accent-soft);
  outline-offset: calc(4 * var(--ui-px, 1px));
}
.feature-slider:focus-visible { outline: none; }
.page-glow {
  display: none;
}
.page-glow--left { top: 6%; left: calc(-260 * var(--ui-px, 1px)); background: #6324c4; }
.page-glow--right { right: calc(-300 * var(--ui-px, 1px)); bottom: calc(-180 * var(--ui-px, 1px)); background: #9a3ee0; }
body[data-active="1"] .page-glow--left { background: #38205f; transform: translateY(calc(80 * var(--ui-px, 1px))); }
body[data-active="2"] .page-glow--right { background: #a047bc; transform: translateY(calc(-60 * var(--ui-px, 1px))); }
.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: calc(72 * var(--ui-px, 1px));
  margin: 0;
  padding: calc(15 * var(--ui-px, 1px)) calc(32 * var(--ui-px, 1px));
}
.brand {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  text-decoration: none;
}
.brand__mark {
  display: block;
  width: calc(54 * var(--ui-px, 1px));
  height: calc(54 * var(--ui-px, 1px));
  object-fit: contain;
  filter: drop-shadow(0 calc(8 * var(--ui-px, 1px)) calc(18 * var(--ui-px, 1px)) rgba(182, 124, 255, 0.28));
}
.site-nav { display: flex; gap: calc(28 * var(--ui-px, 1px)); align-items: center; }
.site-nav__link {
  position: relative;
  padding: calc(10 * var(--ui-px, 1px)) 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: calc(14 * var(--ui-px, 1px));
  text-decoration: none;
  cursor: pointer;
  transition: color 220ms ease;
}
.site-nav__link:hover, .site-nav__link.is-active { color: var(--text); }
.site-nav__link.is-active::after {
  position: absolute;
  right: 0;
  bottom: calc(1 * var(--ui-px, 1px));
  left: 0;
  height: calc(2 * var(--ui-px, 1px));
  border-radius: calc(999 * var(--ui-px, 1px));
  background: var(--accent);
  content: "";
}
.hero {
  width: 100%;
  min-height: calc(100 * 1vh);
  margin: 0 auto;
  padding: calc(66 * var(--ui-px, 1px)) 0 calc(70 * var(--ui-px, 1px));
  text-align: center;
}
.hero__heading {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: clamp(calc(10 * var(--ui-px, 1px)), calc(1.4 * 1vw), calc(20 * var(--ui-px, 1px)));
  width: max-content;
  margin: 0 auto;
  font-family: "Dongyuan Song One", "Songti SC", "Noto Serif CJK SC", serif;
}
.hero__community {
  display: flex;
  width: clamp(calc(132 * var(--ui-px, 1px)), calc(12 * 1vw), calc(176 * var(--ui-px, 1px)));
  flex-direction: column;
  align-items: stretch;
  padding-bottom: calc(4 * var(--ui-px, 1px));
  opacity: 0;
  animation: title-community-in 800ms var(--ease) 80ms forwards;
}
.hero__ygo {
  display: block;
  color: #c4add8;
  font-family: inherit;
  font-size: clamp(calc(44 * var(--ui-px, 1px)), calc(5.4 * 1vw), calc(80 * var(--ui-px, 1px)));
  line-height: 0.82;
  letter-spacing: -0.04em;
  text-align: center;
  transition: color 450ms ease, filter 450ms ease, transform 450ms var(--ease);
}
.hero__emphasis {
  display: flex;
  width: 100%;
  height: 1.5em;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: calc(4 * var(--ui-px, 1px));
  margin-top: calc(13 * var(--ui-px, 1px));
  color: #c4add8;
  font-size: clamp(calc(10 * var(--ui-px, 1px)), calc(0.9 * 1vw), calc(13 * var(--ui-px, 1px)));
  letter-spacing: 0;
  white-space: nowrap;
  transition: filter 450ms ease, transform 450ms var(--ease);
}
.hero__emphasis::before, .hero__emphasis::after {
  content: '';
  display: block;
  height: calc(1 * var(--ui-px, 1px));
  background: currentColor;
  opacity: .8;
}
.hero__community:hover .hero__ygo {
  color: #d6b7ff;
  filter: drop-shadow(0 0 calc(18 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.26));
  transform: translateY(calc(-4 * var(--ui-px, 1px)));
}
.hero__community:hover .hero__emphasis {
  filter: brightness(1.08);
  transform: translateY(calc(-2 * var(--ui-px, 1px)));
}
.hero__title-lockup {
  display: block;
  transition: filter 450ms ease;
}
.hero__title-lockup:hover {
  filter: brightness(1.08) drop-shadow(0 0 calc(18 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.22));
}
.hero__eyebrow {
  display: block;
  width: 100%;
  margin-bottom: calc(2 * var(--ui-px, 1px));
  color: #a994bd;
  font-size: clamp(calc(11 * var(--ui-px, 1px)), calc(1 * 1vw), calc(15 * var(--ui-px, 1px)));
  font-family: inherit;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  transition: color 450ms ease, filter 450ms ease, transform 450ms var(--ease);
}
.hero h1 {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin: 0;
  font-size: clamp(calc(54 * var(--ui-px, 1px)), calc(5.8 * 1vw), calc(82 * var(--ui-px, 1px)));
  font-weight: 760;
  line-height: 1.04;
  letter-spacing: -0.08em;
  opacity: 0;
  animation: title-main-in 850ms var(--ease) 220ms forwards;
}
.hero__title-prefix {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.hero__title-prefix-text,
.hero__title-core {
  display: flex;
  align-items: baseline;
}
.hero__title-char {
  display: inline-block;
  transition: color 450ms ease, transform 450ms var(--ease);
}
.hero__title-char--one { color: #a491b7; font-size: 0.82em; }
.hero__title-char--two { color: #c4add8; font-size: 0.86em; }
.hero__title-char--three { color: #faf6ff; font-size: 1.08em; }
.hero__title-char--four { color: #d6b7ff; font-size: 1.08em; }
.hero__title-lockup:hover .hero__title-char--one { transform: translateY(calc(-1 * var(--ui-px, 1px))); }
.hero__title-lockup:hover .hero__title-char--two { transform: translateY(calc(-2 * var(--ui-px, 1px))); }
.hero__title-lockup:hover .hero__title-char--three { transform: translateY(calc(-3 * var(--ui-px, 1px))); }
.hero__title-lockup:hover .hero__title-char--four { transform: translateY(calc(-4 * var(--ui-px, 1px))); }
.hero__title-lockup:hover .hero__eyebrow {
  color: #c9addf;
  filter: drop-shadow(0 0 calc(14 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.2));
  transform: translateY(calc(-3 * var(--ui-px, 1px)));
}
.feature-slider {
  position: relative;
  margin-top: clamp(calc(62 * var(--ui-px, 1px)), calc(7 * 1vh), calc(84 * var(--ui-px, 1px)));
  opacity: 0;
  touch-action: pan-y;
  animation: slider-stage-in 950ms var(--card-slide-ease) 430ms forwards;
}
@keyframes title-community-in {
  from { opacity: 0; transform: translateX(calc(-18 * var(--ui-px, 1px))); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes title-main-in {
  from { opacity: 0; transform: translateY(calc(12 * var(--ui-px, 1px))); filter: blur(calc(5 * var(--ui-px, 1px))); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
@keyframes slider-stage-in {
  from { opacity: 0; transform: translateY(calc(24 * var(--ui-px, 1px))); }
  to { opacity: 1; transform: translateY(0); }
}
.feature-slider__stage {
  position: relative;
  height: calc(500 * var(--ui-px, 1px));
  overflow: visible;
  perspective: calc(1200 * var(--ui-px, 1px));
  perspective-origin: 50% 48%;
}
.feature-card {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  position: absolute;
  top: calc(10 * var(--ui-px, 1px));
  left: 50%;
  width: min(calc(320 * var(--ui-px, 1px)), calc(calc(100 * 1vw) - calc(48 * var(--ui-px, 1px))));
  height: calc(460 * var(--ui-px, 1px));
  overflow: visible;
  border: calc(1 * var(--ui-px, 1px)) solid var(--line);
  border-radius: calc(25 * var(--ui-px, 1px));
  background: transparent;
  box-shadow: 0 calc(28 * var(--ui-px, 1px)) calc(75 * var(--ui-px, 1px)) rgba(0, 0, 0, 0.48);
  text-align: left;
  opacity: 0.46;
  transform: translateX(-50%) scale(0.78);
  transform-style: preserve-3d;
  transition: transform var(--card-transform-duration, 800ms) var(--card-transform-ease, var(--card-slide-ease)), opacity 500ms ease, filter 600ms ease, border-color 400ms ease, box-shadow 600ms var(--ease);
  user-select: none;
  cursor: pointer;
}
.feature-card::after {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.11), transparent 26%);
  content: "";
}
.feature-card.is-prev {
  z-index: 1;
  opacity: 0.62;
  filter: saturate(0.72) brightness(0.72);
  transform: translateX(calc(-50% - calc(320 * var(--ui-px, 1px)))) scale(0.8) rotateY(-24deg);
}
.feature-card.is-prev:hover {
  transform: translateX(calc(-50% - calc(320 * var(--ui-px, 1px)))) translateY(calc(-5 * var(--ui-px, 1px))) translateZ(calc(16 * var(--ui-px, 1px))) scale(0.81) rotateY(-24deg);
}
.feature-card.is-next {
  z-index: 1;
  opacity: 0.62;
  filter: saturate(0.72) brightness(0.72);
  transform: translateX(calc(-50% + calc(320 * var(--ui-px, 1px)))) scale(0.8) rotateY(24deg);
}
.feature-card.is-next:hover {
  transform: translateX(calc(-50% + calc(320 * var(--ui-px, 1px)))) translateY(calc(-5 * var(--ui-px, 1px))) translateZ(calc(16 * var(--ui-px, 1px))) scale(0.81) rotateY(24deg);
}
.feature-card.is-active {
  z-index: 3;
  border-color: rgba(216, 185, 255, 0.28);
  opacity: 1;
  cursor: default;
  filter: none;
  transform: translateX(-50%) scale(1) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  box-shadow: 0 calc(38 * var(--ui-px, 1px)) calc(100 * var(--ui-px, 1px)) rgba(0, 0, 0, 0.6), 0 0 calc(60 * var(--ui-px, 1px)) rgba(142, 80, 221, 0.1);
}
.feature-card.is-active:hover {
  border-color: rgba(207, 158, 255, 0.88);
  transform: translateX(-50%) translateY(calc(-6 * var(--ui-px, 1px))) translateZ(calc(24 * var(--ui-px, 1px))) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) scale(1.012);
  box-shadow:
    0 0 0 calc(2 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.24),
    0 0 calc(36 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.42),
    0 calc(38 * var(--ui-px, 1px)) calc(100 * var(--ui-px, 1px)) rgba(0, 0, 0, 0.64);
}
.feature-card__visual {
  position: relative;
  display: flex;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: calc(24 * var(--ui-px, 1px));
  box-shadow: inset 0 calc(-220 * var(--ui-px, 1px)) calc(140 * var(--ui-px, 1px)) calc(-105 * var(--ui-px, 1px)) rgba(7, 3, 12, 0.92);
}
.feature-card__visual::before,
.feature-card__visual::after {
  position: absolute;
  border-radius: 50%;
  content: "";
  filter: blur(calc(2 * var(--ui-px, 1px)));
}
.feature-card__artwork {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  filter: saturate(0.94) contrast(1.04) brightness(0.88);
  transition: filter 600ms var(--ease), transform 900ms var(--ease);
}
.feature-card--community .feature-card__artwork {
  object-position: 50% 0%;
}
.feature-card--draft .feature-card__visual::before,
.feature-card--data .feature-card__visual::before,
.feature-card--community .feature-card__visual::before {
  z-index: 1;
  inset: 0;
  width: auto;
  height: auto;
  border-radius: 0;
  background: linear-gradient(180deg, rgba(20, 8, 32, 0.05) 45%, rgba(15, 7, 24, 0.54) 100%);
  filter: none;
  transform: none;
}
.feature-card--draft .feature-card__visual::after,
.feature-card--data .feature-card__visual::after,
.feature-card--community .feature-card__visual::after { display: none; }
.feature-card--draft.is-active:hover .feature-card__artwork,
.feature-card--data.is-active:hover .feature-card__artwork,
.feature-card--community.is-active:hover .feature-card__artwork {
  filter: saturate(1.02) contrast(1.05) brightness(0.94);
  transform: scale(1.025);
}
.feature-card__visual::before {
  width: calc(300 * var(--ui-px, 1px));
  height: calc(300 * var(--ui-px, 1px));
  background: rgba(255, 255, 255, 0.08);
  transform: translate(-46%, -38%);
}
.feature-card__visual::after {
  right: calc(-70 * var(--ui-px, 1px));
  bottom: calc(-90 * var(--ui-px, 1px));
  width: calc(240 * var(--ui-px, 1px));
  height: calc(240 * var(--ui-px, 1px));
  border: calc(1 * var(--ui-px, 1px)) solid rgba(255, 255, 255, 0.12);
}
.feature-card--draft .feature-card__visual { background: linear-gradient(145deg, #8a55e4 0%, #59309e 100%); }
.feature-card--data .feature-card__visual { background: linear-gradient(145deg, #5a4383 0%, #322449 100%); }
.feature-card--community .feature-card__visual { background: linear-gradient(145deg, #9a60b9 0%, #673780 100%); }
.feature-card__art-index {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.93);
  margin-top: calc(-68 * var(--ui-px, 1px));
  font-size: calc(82 * var(--ui-px, 1px));
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.08em;
}
.feature-card__art-label {
  position: relative;
  z-index: 1;
  margin-top: calc(14 * var(--ui-px, 1px));
  color: rgba(255, 255, 255, 0.52);
  font-size: calc(10 * var(--ui-px, 1px));
  font-weight: 800;
  letter-spacing: 0.28em;
}
.feature-card__body {
  position: absolute;
  z-index: 4;
  bottom: calc(28 * var(--ui-px, 1px));
  left: calc(-74 * var(--ui-px, 1px));
  width: calc(304 * var(--ui-px, 1px));
  padding: 0;
  opacity: 0;
  pointer-events: none;
  backface-visibility: hidden;
  text-shadow: 0 calc(3 * var(--ui-px, 1px)) calc(18 * var(--ui-px, 1px)) rgba(0, 0, 0, 0.9);
  transform: translateY(calc(28 * var(--ui-px, 1px)));
  transition:
    left 650ms var(--ease),
    opacity 420ms ease 120ms,
    transform 650ms var(--ease) 80ms;
}
.feature-card.is-active .feature-card__body {
  opacity: 1;
  transform: translateY(0);
}
.feature-card.is-prev .feature-card__body,
.feature-card.is-next .feature-card__body {
  opacity: 1;
  transform: translateY(0);
}
.feature-card.is-prev .feature-card__body { left: calc(-138 * var(--ui-px, 1px)); }
.feature-card.is-next .feature-card__body { left: calc(212 * var(--ui-px, 1px)); }
.feature-card__heading { margin-bottom: calc(7 * var(--ui-px, 1px)); }
.feature-card__number { color: var(--accent-soft); font-size: calc(13 * var(--ui-px, 1px)); letter-spacing: 0.08em; }
.feature-card h2 { margin: 0; font-size: calc(34 * var(--ui-px, 1px)); font-weight: 400; line-height: 1.05; letter-spacing: -0.04em; }
.feature-card__english {
  display: block;
  margin-top: calc(2 * var(--ui-px, 1px));
  font-size: calc(25 * var(--ui-px, 1px));
  line-height: 1;
  letter-spacing: 0.02em;
}
.feature-card__rule {
  display: block;
  width: calc(72 * var(--ui-px, 1px));
  height: calc(2 * var(--ui-px, 1px));
  margin: calc(15 * var(--ui-px, 1px)) 0 calc(11 * var(--ui-px, 1px));
  background: currentColor;
}
.feature-card p { min-height: 0; margin: 0; color: var(--text); font-size: calc(15 * var(--ui-px, 1px)); line-height: 1.55; }
.feature-card.is-prev .feature-card__body,
.feature-card.is-next .feature-card__body,
.feature-card.is-prev .feature-card__number,
.feature-card.is-next .feature-card__number,
.feature-card.is-prev p,
.feature-card.is-next p {
  color: #a29ba7;
}
.feature-slider__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: calc(-6 * var(--ui-px, 1px));
}
.slider-bars {
  display: flex;
  gap: calc(12 * var(--ui-px, 1px));
  align-items: center;
  min-height: calc(24 * var(--ui-px, 1px));
}
.slider-bar {
  position: relative;
  width: calc(8 * var(--ui-px, 1px));
  height: calc(8 * var(--ui-px, 1px));
  padding: 0;
  border: 0;
  border-radius: calc(999 * var(--ui-px, 1px));
  background: rgba(255, 255, 255, 0.56);
  cursor: pointer;
  transition: width 450ms var(--ease), background-color 450ms var(--ease), box-shadow 450ms var(--ease);
}
.slider-bar:hover { background: rgba(255, 255, 255, 0.86); }
.slider-bar.is-active {
  width: calc(26 * var(--ui-px, 1px));
  background: var(--accent);
  box-shadow: 0 0 calc(16 * var(--ui-px, 1px)) rgba(184, 124, 255, 0.62);
}
.site-footer {
  position: fixed;
  z-index: 8;
  right: calc(32 * var(--ui-px, 1px));
  bottom: calc(22 * var(--ui-px, 1px));
  left: calc(32 * var(--ui-px, 1px));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: calc(12 * var(--ui-px, 1px));
  width: auto;
  margin: 0;
  padding: 0;
  color: #766d82;
  font-size: calc(11 * var(--ui-px, 1px));
  letter-spacing: 0.06em;
}
.site-footer > span:last-child { justify-self:end; }
.site-footer__icp { color:var(--muted); text-decoration:none; white-space:nowrap; }
.site-footer__icp:hover { color:var(--text); text-decoration:underline; }
@media (max-width:600px) {
  .site-footer { grid-template-columns:1fr 1fr; }
  .site-footer__icp { grid-column:1 / -1; grid-row:2; justify-self:center; font-size:11px; }
  .site-footer > span:last-child { grid-column:2; grid-row:1; }
}
.toast {
  position: fixed;
  z-index: 20;
  right: calc(24 * var(--ui-px, 1px));
  bottom: calc(24 * var(--ui-px, 1px));
  display: flex;
  gap: calc(10 * var(--ui-px, 1px));
  align-items: center;
  padding: calc(14 * var(--ui-px, 1px)) calc(18 * var(--ui-px, 1px));
  border: calc(1 * var(--ui-px, 1px)) solid var(--line-strong);
  border-radius: calc(14 * var(--ui-px, 1px));
  color: var(--text);
  background: rgba(29, 21, 40, 0.9);
  box-shadow: 0 calc(18 * var(--ui-px, 1px)) calc(55 * var(--ui-px, 1px)) rgba(0, 0, 0, 0.4);
  font-size: calc(13 * var(--ui-px, 1px));
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(calc(16 * var(--ui-px, 1px)));
  transform: translateY(calc(14 * var(--ui-px, 1px)));
  transition: opacity 220ms ease, transform 350ms var(--ease);
}
.toast.is-visible { opacity: 1; transform: translateY(0); }
.toast__dot { width: calc(7 * var(--ui-px, 1px)); height: calc(7 * var(--ui-px, 1px)); border-radius: 50%; background: var(--accent); box-shadow: 0 0 calc(16 * var(--ui-px, 1px)) var(--accent); }
@media (min-width: 601px) {
.feature-slider > .toast {
    position: absolute; top: calc(100% + calc(14 * var(--ui-px, 1px))); left: 50%; right: auto; bottom: auto;
    width: max-content; max-width: calc(calc(100 * 1vw) - calc(32 * var(--ui-px, 1px))); justify-content: center;
    transform: translate(-50%, calc(14 * var(--ui-px, 1px)));
  }
.feature-slider > .toast.is-visible { transform: translate(-50%, 0); }
}
@media (max-width: 920px) {
.feature-card.is-prev { transform: translateX(calc(-50% - calc(270 * var(--ui-px, 1px)))) scale(0.76) rotateY(-24deg); }
.feature-card.is-next { transform: translateX(calc(-50% + calc(270 * var(--ui-px, 1px)))) scale(0.76) rotateY(24deg); }
.feature-card.is-active .feature-card__body { left: calc(-42 * var(--ui-px, 1px)); }
.feature-card.is-prev .feature-card__body { left: calc(-98 * var(--ui-px, 1px)); }
.feature-card.is-next .feature-card__body { left: calc(194 * var(--ui-px, 1px)); }
}
@media (min-width: 601px) {
.feature-card {
    backface-visibility: hidden;
    will-change: transform, opacity;
    transition:
      transform var(--card-transform-duration, 620ms) var(--card-transform-ease, var(--card-slide-ease)),
      opacity 360ms ease,
      border-color 300ms ease;
  }
.feature-card.is-prev,
  .feature-card.is-next {
    filter: none;
  }
.feature-card__body {
    left: calc(-74 * var(--ui-px, 1px));
    transition:
      opacity 320ms ease 80ms,
      transform 620ms var(--ease) 40ms;
  }
.feature-card.is-active .feature-card__body {
    left: calc(-74 * var(--ui-px, 1px));
    transform: translate3d(0, 0, 0);
  }
.feature-card.is-prev .feature-card__body {
    left: calc(-74 * var(--ui-px, 1px));
    transform: translate3d(calc(-64 * var(--ui-px, 1px)), 0, 0);
  }
.feature-card.is-next .feature-card__body {
    left: calc(-74 * var(--ui-px, 1px));
    transform: translate3d(calc(286 * var(--ui-px, 1px)), 0, 0);
  }
}
@media (min-width: 601px) and (max-width: 920px) {
.feature-card__body,
  .feature-card.is-active .feature-card__body,
  .feature-card.is-prev .feature-card__body,
  .feature-card.is-next .feature-card__body {
    left: calc(-42 * var(--ui-px, 1px));
  }
.feature-card.is-prev .feature-card__body {
    transform: translate3d(calc(-56 * var(--ui-px, 1px)), 0, 0);
  }
.feature-card.is-next .feature-card__body {
    transform: translate3d(calc(236 * var(--ui-px, 1px)), 0, 0);
  }
}
@media (max-width: 600px) {
.page-artwork-backdrop::after { background: rgba(3, 3, 6, 0.52); }
.page-artwork-backdrop__image {
    filter: blur(calc(24 * var(--ui-px, 1px))) brightness(0.58) saturate(0.82);
    transform: translateZ(0) scale(1.08);
    visibility: visible;
    will-change: opacity;
  }
.site-header { width: 100%; height: calc(64 * var(--ui-px, 1px)); padding: calc(12 * var(--ui-px, 1px)) calc(16 * var(--ui-px, 1px)); }
.brand__mark { width: calc(46 * var(--ui-px, 1px)); height: calc(46 * var(--ui-px, 1px)); }
.site-nav { gap: calc(20 * var(--ui-px, 1px)); }
.hero { width: 100%; padding: calc(62 * var(--ui-px, 1px)) 0 calc(54 * var(--ui-px, 1px)); }
.hero__heading { gap: calc(15 * var(--ui-px, 1px)); width: calc(100% - calc(28 * var(--ui-px, 1px))); }
.hero__community { width: calc(94 * var(--ui-px, 1px)); }
.hero__ygo { font-size: calc(38 * var(--ui-px, 1px)); }
.hero__emphasis { margin-top: calc(8 * var(--ui-px, 1px)); font-size: calc(8 * var(--ui-px, 1px)); letter-spacing: 0; gap:calc(3 * var(--ui-px, 1px)); }
.hero__eyebrow { margin-bottom: calc(5 * var(--ui-px, 1px)); font-size: calc(10 * var(--ui-px, 1px)); }
.hero h1 { font-size: calc(45 * var(--ui-px, 1px)); }
.feature-slider { margin-top: calc(38 * var(--ui-px, 1px)); }
.feature-slider__stage { height: calc(486 * var(--ui-px, 1px)); }
.feature-card { top: calc(10 * var(--ui-px, 1px)); width: min(calc(326 * var(--ui-px, 1px)), calc(calc(100 * 1vw) - calc(44 * var(--ui-px, 1px)))); height: calc(450 * var(--ui-px, 1px)); }
.feature-card.is-prev { transform: translateX(calc(-50% - calc(245 * var(--ui-px, 1px)))) scale(0.67) rotateY(-25deg); }
.feature-card.is-next { transform: translateX(calc(-50% + calc(245 * var(--ui-px, 1px)))) scale(0.67) rotateY(25deg); }
.feature-card.is-prev,
  .feature-card.is-next {
    opacity: 0;
    pointer-events: none;
  }
.feature-card__art-index { font-size: calc(64 * var(--ui-px, 1px)); }
.feature-card.is-active .feature-card__body {
    left: calc(14 * var(--ui-px, 1px));
    bottom: calc(20 * var(--ui-px, 1px));
    width: calc(100% - calc(28 * var(--ui-px, 1px)));
    padding: calc(14 * var(--ui-px, 1px)) calc(16 * var(--ui-px, 1px));
    border-radius: calc(15 * var(--ui-px, 1px));
    background: rgba(15, 9, 23, 0.48);
    backdrop-filter: blur(calc(12 * var(--ui-px, 1px)));
    -webkit-backdrop-filter: blur(calc(12 * var(--ui-px, 1px)));
  }
.feature-card h2 { font-size: calc(27 * var(--ui-px, 1px)); }
.feature-card__english { font-size: calc(20 * var(--ui-px, 1px)); }
.feature-card p { font-size: calc(13 * var(--ui-px, 1px)); }
.site-footer { right: calc(16 * var(--ui-px, 1px)); bottom: calc(14 * var(--ui-px, 1px)); left: calc(16 * var(--ui-px, 1px)); gap: calc(8 * var(--ui-px, 1px)); font-size: calc(9 * var(--ui-px, 1px)); }
.toast { right: calc(16 * var(--ui-px, 1px)); bottom: calc(16 * var(--ui-px, 1px)); left: calc(16 * var(--ui-px, 1px)); justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
.hero__eyebrow,
  .hero__community,
  .hero h1,
  .feature-slider {
    opacity: 1;
    animation: none !important;
    filter: none;
    transform: none;
  }
.page-artwork-backdrop__image { transition: none; }
}
@media (max-width: 600px) {
body { min-height: calc(100 * 1dvh); }
.site-header { height: calc(60 * var(--ui-px, 1px)); padding: calc(8 * var(--ui-px, 1px)) calc(16 * var(--ui-px, 1px)); }
.hero { height: calc(100 * 1dvh); min-height: 0; padding: calc(78 * var(--ui-px, 1px)) 0 calc(40 * var(--ui-px, 1px)); display: flex; flex-direction: column; }
.hero__heading { flex: 0 0 auto; gap: calc(12 * var(--ui-px, 1px)); }
.hero__community { width: calc(80 * var(--ui-px, 1px)); }
.hero__ygo { font-size: calc(30 * var(--ui-px, 1px)); }
.hero h1 { font-size: calc(38 * var(--ui-px, 1px)); }
.feature-slider { flex: 1; min-height: 0; width: 100%; margin-top: calc(16 * var(--ui-px, 1px)); touch-action: pan-x; }
.feature-slider__stage { height: 100%; perspective: calc(850 * var(--ui-px, 1px)); perspective-origin: 53% 50%; }
.feature-card { top: 50%; left: 53%; width: 66%; height: 30%; border-radius: calc(22 * var(--ui-px, 1px)); }
.feature-card.is-active, .feature-card.is-active:hover { transform: translate(-50%, -50%); }
.feature-card.is-prev, .feature-card.is-prev:hover { transform: translate(-50%, -145%) rotateX(30deg) scale(.9); }
.feature-card.is-next, .feature-card.is-next:hover { transform: translate(-50%, 45%) rotateX(-30deg) scale(.9); }
.feature-card.is-prev, .feature-card.is-next { opacity: .82; pointer-events: auto; filter: brightness(.85) saturate(.8); }
.feature-card__visual { border-radius: inherit; }
.feature-card--draft .feature-card__artwork { object-position: 50% 0%; }
.feature-card--community .feature-card__visual {
    container-type: size;
    background: radial-gradient(ellipse at 85% 10%, #69405a, transparent 70%), linear-gradient(135deg, #281c36, #171426);
  }
.feature-card--community .feature-card__artwork {
    left: auto; right: -2%; width: min(68cqw, 100cqh);
    top: calc(50cqh - min(31.1cqw, 45.7cqh)); object-position: 50% 0%;
    mask-image: linear-gradient(to right, transparent, #000 12%);
  }
.feature-card .feature-card__body, .feature-card.is-active .feature-card__body,
  .feature-card.is-prev .feature-card__body, .feature-card.is-next .feature-card__body {
    left: -22%; bottom: 16%; width: 108%; padding: 0; background: none; border: 0; backdrop-filter: none;
    -webkit-backdrop-filter: none; transform: none; opacity: 1;
  }
.feature-card h2 { font-size: clamp(calc(25 * var(--ui-px, 1px)), calc(7.4 * 1vw), calc(34 * var(--ui-px, 1px))); }
.feature-card__english { font-size: clamp(calc(18 * var(--ui-px, 1px)), calc(5.2 * 1vw), calc(24 * var(--ui-px, 1px))); }
.feature-card__number { font-size: calc(10 * var(--ui-px, 1px)); }
.feature-card__heading { margin-bottom: calc(4 * var(--ui-px, 1px)); }
.feature-card__rule { margin: calc(7 * var(--ui-px, 1px)) 0; width: calc(72 * var(--ui-px, 1px)); }
.feature-card p { font-size: calc(11 * var(--ui-px, 1px)); max-width: calc(210 * var(--ui-px, 1px)); }
.feature-slider__controls { position: absolute; right: 4%; top: 50%; margin: 0; transform: translateY(-50%); }
.slider-bars { flex-direction: column; gap: calc(14 * var(--ui-px, 1px)); }
.slider-bar { width: calc(7 * var(--ui-px, 1px)); height: calc(7 * var(--ui-px, 1px)); transition: height 450ms var(--ease), background-color 450ms var(--ease); }
.slider-bar::after { content: ''; position: absolute; inset: calc(-9 * var(--ui-px, 1px)); }
.slider-bar.is-active { width: calc(7 * var(--ui-px, 1px)); height: calc(28 * var(--ui-px, 1px)); }
.site-footer { font-size: calc(8 * var(--ui-px, 1px)); bottom: max(calc(10 * var(--ui-px, 1px)), env(safe-area-inset-bottom)); }
}