:root {
  --bg: #070a12;
  --panel: #0d1322;
  --panel-2: #111a2d;
  --ink: #f2f7ff;
  --muted: #aab6ca;
  --dim: #6f7d96;
  --cyan: #5de0f7;
  --cyan-2: #a9f3ff;
  --yellow: #f4c84a;
  --line: rgba(157, 190, 230, .17);
  --shadow: 0 32px 90px rgba(0, 0, 0, .38);
  --sans: "Noto Sans JP", system-ui, sans-serif;
  --serif: "Cormorant Garamond", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% -10%, rgba(93, 224, 247, .20), transparent 34rem),
    radial-gradient(circle at 100% 18%, rgba(244, 200, 74, .08), transparent 26rem),
    linear-gradient(180deg, #080b14 0%, #070a12 42%, #0a0d16 100%);
  font-family: var(--sans);
  line-height: 1.75;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: .045;
  background-image:
    linear-gradient(90deg, rgba(255,255,255,.14) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.narrow {
  max-width: 760px;
}

.hero {
  min-height: 100svh;
  padding: 18px 0 58px;
}

.nav {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: #06121c;
  background: var(--cyan);
  border-radius: 7px;
  text-decoration: none;
  font-weight: 900;
  box-shadow: 0 0 34px rgba(93, 224, 247, .4);
}

.nav-links {
  display: flex;
  gap: 6px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 7px;
}

.nav-links a:hover {
  color: var(--ink);
  background: rgba(255,255,255,.06);
}

.hero-grid {
  min-height: calc(100svh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, .9fr);
  align-items: center;
  gap: clamp(34px, 5vw, 74px);
}

.hero-grid > *,
.hero-copy,
.about-grid > *,
.gift-box > * {
  min-width: 0;
}

.eyebrow,
.section-label {
  margin: 0;
  color: var(--cyan-2);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .28em;
  text-transform: uppercase;
}

.section-label {
  text-align: center;
}

.section-label.left {
  text-align: left;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: 0;
}

h1 .h-line {
  display: block;
  max-width: 100%;
}

h1 em {
  font-style: normal;
}

h1 em,
.manifesto h2 span {
  color: var(--cyan);
  text-shadow: 0 0 28px rgba(93, 224, 247, .36);
}

h2 {
  margin: 14px 0 18px;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.24;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.45;
}

.lead {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 19px);
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 16px 22px;
  border-radius: 7px;
  text-decoration: none;
  font-weight: 900;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  color: #06121c;
  background: var(--cyan);
  box-shadow: 0 18px 48px rgba(93, 224, 247, .24);
}

.btn.primary:hover {
  box-shadow: 0 22px 64px rgba(93, 224, 247, .34);
}

.btn.secondary {
  color: var(--cyan-2);
  border: 1px solid rgba(93, 224, 247, .35);
  background: rgba(93, 224, 247, .05);
}

.btn.wide {
  width: 100%;
  margin-top: 24px;
}

.arrow {
  font-size: 20px;
  line-height: 1;
}

.signal-panel {
  margin: 0;
  position: relative;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid rgba(93, 224, 247, .28);
  border-radius: 16px;
  background:
    radial-gradient(circle at 14% 0%, rgba(93, 224, 247, .20), transparent 38%),
    radial-gradient(circle at 100% 100%, rgba(244, 200, 74, .10), transparent 34%),
    rgba(13, 19, 34, .84);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
}

.signal-panel::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 24px;
  background: radial-gradient(circle, rgba(93, 224, 247, .20), transparent 64%);
  z-index: -1;
  filter: blur(6px);
}

.signal-head {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.signal-head span {
  color: var(--cyan);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.signal-head strong {
  color: var(--ink);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.25;
}

.signal-flow {
  display: grid;
  gap: 12px;
}

.signal-flow div {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255,255,255,.045);
  position: relative;
  overflow: hidden;
  transform: translateY(0);
  animation: signalLift 4.8s ease-in-out infinite;
  transition: transform .25s ease, border-color .25s ease, background .25s ease, box-shadow .25s ease;
}

.signal-flow div::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(110deg, transparent 0%, rgba(93,224,247,.22) 42%, rgba(255,255,255,.28) 50%, rgba(93,224,247,.16) 58%, transparent 100%);
  transform: translateX(-115%);
  animation: signalSweep 5.8s ease-in-out infinite;
  pointer-events: none;
}

.signal-flow div:nth-child(2) {
  animation-delay: .28s;
}

.signal-flow div:nth-child(2)::before {
  animation-delay: .45s;
}

.signal-flow div:nth-child(3) {
  animation-delay: .56s;
}

.signal-flow div:nth-child(3)::before {
  animation-delay: .9s;
}

.signal-flow div:hover {
  transform: translateY(-4px);
  border-color: rgba(93, 224, 247, .55);
  background: rgba(93,224,247,.085);
  box-shadow: 0 18px 46px rgba(0,0,0,.32), 0 0 34px rgba(93,224,247,.16);
}

.signal-flow span {
  color: #06121c;
  background: var(--cyan);
  border-radius: 7px;
  text-align: center;
  font-weight: 900;
  padding: 5px 0;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 24px rgba(93,224,247,.20);
}

.signal-flow p,
.signal-copy {
  margin: 0;
  color: var(--muted);
  position: relative;
  z-index: 1;
}

.signal-copy {
  margin-top: 22px;
}

.band {
  padding: clamp(64px, 9vw, 112px) 0;
  background: linear-gradient(180deg, rgba(13, 19, 34, .72), rgba(17, 26, 45, .82));
  border-block: 1px solid var(--line);
}

.problem h2,
.levels h2,
.links h2 {
  text-align: center;
}

.issue-list {
  margin-top: 34px;
  display: grid;
  gap: 12px;
}

.issue-list div {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  position: relative;
  overflow: hidden;
  padding: 17px 18px;
  border: 1px solid rgba(171, 205, 245, .22);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.025)),
    rgba(13, 19, 34, .88);
  box-shadow:
    0 16px 48px rgba(0,0,0,.28),
    0 0 0 1px rgba(93,224,247,.055),
    inset 0 1px 0 rgba(255,255,255,.10);
  animation: issueItemFloat 6.4s ease-in-out infinite;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
}

.issue-list div::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, transparent 0%, rgba(93,224,247,.14) 44%, rgba(255,255,255,.18) 50%, rgba(93,224,247,.08) 58%, transparent 100%);
  transform: translateX(-120%);
  animation: issueItemSweep 7.2s ease-in-out infinite;
  pointer-events: none;
}

.issue-list div:nth-child(2) {
  animation-delay: .18s;
}

.issue-list div:nth-child(2)::before {
  animation-delay: .28s;
}

.issue-list div:nth-child(3) {
  animation-delay: .36s;
}

.issue-list div:nth-child(3)::before {
  animation-delay: .56s;
}

.issue-list div:nth-child(4) {
  animation-delay: .54s;
}

.issue-list div:nth-child(4)::before {
  animation-delay: .84s;
}

.issue-list div:nth-child(5) {
  animation-delay: .72s;
}

.issue-list div:nth-child(5)::before {
  animation-delay: 1.12s;
}

.issue-list div:hover {
  transform: translateY(-4px);
  border-color: rgba(93, 224, 247, .52);
  background:
    linear-gradient(180deg, rgba(93,224,247,.13), rgba(255,255,255,.03)),
    rgba(13, 19, 34, .94);
  box-shadow:
    0 24px 62px rgba(0,0,0,.36),
    0 0 34px rgba(93,224,247,.14),
    inset 0 1px 0 rgba(255,255,255,.13);
}

.issue-list span,
.lv {
  color: var(--cyan);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
}

.issue-list span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #06121c;
  background: var(--cyan);
  border-radius: 10px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 0 26px rgba(93,224,247,.22);
  position: relative;
  z-index: 1;
}

.issue-list p {
  margin: 0;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.65;
  position: relative;
  z-index: 1;
}

.manifesto,
.gift,
.links {
  padding: clamp(72px, 10vw, 126px) 0;
}

.manifesto {
  text-align: center;
  max-width: 850px;
}

.manifesto p {
  color: var(--muted);
  font-size: 17px;
}

.formula {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 34px;
  padding: 18px;
  border: 1px solid rgba(93, 224, 247, .34);
  border-radius: 14px;
  background:
    radial-gradient(circle at 50% 0%, rgba(93,224,247,.14), transparent 55%),
    rgba(10, 16, 29, .86);
  box-shadow:
    0 22px 70px rgba(0,0,0,.34),
    0 0 0 1px rgba(93,224,247,.08),
    inset 0 1px 0 rgba(255,255,255,.08);
}

.formula span {
  position: relative;
  overflow: hidden;
  padding: 10px 14px;
  border: 1px solid rgba(93, 224, 247, .42);
  border-radius: 9px;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255,255,255,.13), rgba(255,255,255,.045)),
    rgba(17, 26, 45, .92);
  font-weight: 900;
  box-shadow:
    0 12px 34px rgba(0,0,0,.26),
    0 0 24px rgba(93,224,247,.12),
    inset 0 1px 0 rgba(255,255,255,.14);
  transition: transform .24s ease, border-color .24s ease, box-shadow .24s ease, background .24s ease;
}

.formula span::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 0%, rgba(93,224,247,.22) 48%, transparent 72%);
  transform: translateX(-115%);
  transition: transform .5s ease;
}

.formula span:hover {
  transform: translateY(-3px);
  border-color: rgba(93, 224, 247, .72);
  background:
    linear-gradient(180deg, rgba(93,224,247,.24), rgba(255,255,255,.055)),
    rgba(17, 26, 45, .96);
  box-shadow:
    0 18px 46px rgba(0,0,0,.34),
    0 0 34px rgba(93,224,247,.22),
    inset 0 1px 0 rgba(255,255,255,.18);
}

.formula span:hover::before {
  transform: translateX(115%);
}

.formula strong {
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(93,224,247,.38);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
  perspective: 1200px;
}

.level-grid article,
.gift-box,
.about-note,
.link-card {
  border: 1px solid var(--line);
  background: rgba(13, 19, 34, .72);
  box-shadow: 0 20px 70px rgba(0,0,0,.18);
}

.level-grid article {
  position: relative;
  min-height: 270px;
  padding: 24px;
  border-radius: 12px;
  border-color: rgba(171, 205, 245, .26);
  background:
    linear-gradient(180deg, rgba(255,255,255,.085), rgba(255,255,255,.025)),
    rgba(13, 19, 34, .92);
  box-shadow:
    0 24px 80px rgba(0,0,0,.38),
    0 0 0 1px rgba(93,224,247,.08),
    inset 0 1px 0 rgba(255,255,255,.10);
  overflow: hidden;
  transform: translateY(0) rotateX(0deg);
  animation: cardFloat 5.8s ease-in-out infinite;
  transition: transform .28s ease, border-color .28s ease, box-shadow .28s ease, background .28s ease;
}

.level-grid article::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(93,224,247,.20), transparent 34%),
    radial-gradient(circle at 82% 14%, rgba(244,200,74,.16), transparent 24%);
  opacity: .48;
  pointer-events: none;
}

.level-grid article::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: .68;
}

.level-grid article:nth-child(2) {
  animation-delay: .45s;
}

.level-grid article:nth-child(3) {
  animation-delay: .9s;
}

.level-grid article.active {
  border-color: rgba(93, 224, 247, .48);
  background:
    radial-gradient(circle at 100% 0%, rgba(93, 224, 247, .18), transparent 48%),
    rgba(13, 19, 34, .86);
  box-shadow:
    0 30px 100px rgba(0,0,0,.46),
    0 0 48px rgba(93,224,247,.18),
    0 0 0 1px rgba(93,224,247,.22),
    inset 0 1px 0 rgba(255,255,255,.12);
}

.level-grid article:hover {
  transform: translateY(-8px) rotateX(2deg);
  border-color: rgba(93, 224, 247, .62);
  box-shadow:
    0 36px 110px rgba(0,0,0,.52),
    0 0 52px rgba(93,224,247,.22),
    0 0 0 1px rgba(93,224,247,.25),
    inset 0 1px 0 rgba(255,255,255,.14);
}

.level-grid article > * {
  position: relative;
  z-index: 1;
}

.level-grid p:not(.lv) {
  color: var(--muted);
  margin: 0;
}

@keyframes cardFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}

@keyframes signalLift {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes signalSweep {
  0%, 34% {
    transform: translateX(-115%);
  }
  56%, 100% {
    transform: translateX(115%);
  }
}

@keyframes giftItemFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

@keyframes giftItemSweep {
  0%, 38% {
    transform: translateX(-120%);
  }
  58%, 100% {
    transform: translateX(120%);
  }
}

@keyframes issueItemFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes issueItemSweep {
  0%, 42% {
    transform: translateX(-120%);
  }
  62%, 100% {
    transform: translateX(120%);
  }
}

.gift-box {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, .8fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  padding: clamp(28px, 5vw, 52px);
  border-radius: 14px;
  background:
    radial-gradient(circle at 8% 0%, rgba(93, 224, 247, .22), transparent 36%),
    radial-gradient(circle at 90% 18%, rgba(244, 200, 74, .12), transparent 30%),
    rgba(13, 19, 34, .88);
}

.gift-box p,
.about p {
  color: var(--muted);
}

.gift-box ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.gift-box li {
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
  margin: 12px 0;
  padding: 17px 18px;
  border: 1px solid rgba(93, 224, 247, .24);
  border-radius: 11px;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  background:
    linear-gradient(180deg, rgba(255,255,255,.095), rgba(255,255,255,.035)),
    rgba(17, 26, 45, .92);
  box-shadow:
    0 16px 42px rgba(0,0,0,.26),
    0 0 0 1px rgba(93,224,247,.07),
    inset 0 1px 0 rgba(255,255,255,.11);
  animation: giftItemFloat 5.4s ease-in-out infinite;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
}

.gift-box li:first-child {
  border-top: 1px solid rgba(93, 224, 247, .24);
}

.gift-box li::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, transparent 0%, rgba(93,224,247,.20) 42%, rgba(255,255,255,.25) 50%, rgba(93,224,247,.12) 58%, transparent 100%);
  transform: translateX(-120%);
  animation: giftItemSweep 6.2s ease-in-out infinite;
  pointer-events: none;
}

.gift-box li:nth-child(2) {
  animation-delay: .32s;
}

.gift-box li:nth-child(2)::before {
  animation-delay: .48s;
}

.gift-box li:nth-child(3) {
  animation-delay: .64s;
}

.gift-box li:nth-child(3)::before {
  animation-delay: .96s;
}

.gift-box li:hover {
  transform: translateY(-5px);
  border-color: rgba(93, 224, 247, .58);
  background:
    linear-gradient(180deg, rgba(93,224,247,.18), rgba(255,255,255,.04)),
    rgba(17, 26, 45, .96);
  box-shadow:
    0 24px 62px rgba(0,0,0,.36),
    0 0 38px rgba(93,224,247,.18),
    inset 0 1px 0 rgba(255,255,255,.14);
}

.gift-box li span {
  display: grid;
  place-items: center;
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  color: #06121c;
  background: var(--yellow);
  border-radius: 9px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 900;
  box-shadow: 0 0 26px rgba(244,200,74,.26);
  position: relative;
  z-index: 1;
}

.gift-box li > * {
  position: relative;
  z-index: 1;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .6fr);
  gap: 28px;
  align-items: center;
}

.about-note {
  padding: 26px;
  border-radius: 12px;
}

.about-note strong {
  color: var(--cyan);
}

.about-note p {
  margin: 8px 0 0;
}

.link-stack {
  max-width: 760px;
  margin: 34px auto 0;
  display: grid;
  gap: 14px;
}

.link-card {
  display: grid;
  gap: 5px;
  padding: 22px 24px;
  border-radius: 12px;
  text-decoration: none;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  border-color: rgba(93, 224, 247, .5);
  background: rgba(93, 224, 247, .08);
}

.link-card.main {
  border-color: rgba(93, 224, 247, .45);
  background: rgba(93, 224, 247, .09);
}

.link-card span {
  color: var(--cyan);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.link-card strong {
  font-size: 18px;
}

.link-card em {
  color: var(--muted);
  font-style: normal;
  font-size: 13px;
}

footer {
  position: relative;
  z-index: 2;
  padding: 42px 20px 52px;
  text-align: center;
  color: var(--dim);
  border-top: 1px solid var(--line);
}

footer p {
  margin: 0 0 6px;
  color: var(--ink);
  font-weight: 900;
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .72s ease, transform .72s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (max-width: 860px) {
  .hero {
    min-height: auto;
    padding-bottom: 54px;
  }

  .hero-grid,
  .level-grid,
  .gift-box,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    padding-top: 38px;
  }

  .signal-panel {
    max-width: 440px;
    margin: 0 auto;
  }

  .level-grid article {
    min-height: auto;
  }
}

@media (max-width: 560px) {
  .shell {
    width: auto;
    margin-left: 14px;
    margin-right: 14px;
    max-width: none;
  }

  .nav-links a {
    padding: 6px 5px;
    font-size: 11px;
  }

  .nav-links {
    display: none;
  }

  h1 {
    font-size: clamp(36px, 11.2vw, 50px);
    line-height: 1.08;
  }

  h2 {
    font-size: clamp(27px, 9vw, 40px);
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .issue-list div {
    grid-template-columns: 48px minmax(0, 1fr);
    padding: 15px 14px;
  }

  .gift-box {
    padding: 24px 18px;
  }

  .signal-panel,
  .hero-actions,
  .btn {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .level-grid article {
    animation: none;
  }

  .signal-flow div,
  .signal-flow div::before,
  .gift-box li,
  .gift-box li::before,
  .issue-list div,
  .issue-list div::before {
    animation: none;
  }
}