@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@400;500;600;700&display=swap');

:root{
  --vio:#6514ff;
  --mag:#bf00ff;
  --ink:#1c1726;
  --paper:#f7f3ff;
  --line:rgba(28,23,38,.16);
  --r:28px;
  --sans:'Noto Sans JP',system-ui,-apple-system,'Hiragino Sans','Microsoft YaHei',sans-serif;
  --serif:'Noto Serif JP','Songti SC','Times New Roman',serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.78;
  letter-spacing:.012em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:-10% -10% -10% -10%;
  z-index:-1;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(48deg,rgba(101,20,255,.07) 0 2px,transparent 2px 16px),
    radial-gradient(circle at 88% 6%,rgba(191,0,255,.18),transparent 58%),
    radial-gradient(circle at 4% 92%,rgba(101,20,255,.14),transparent 52%);
  animation:drift 26s linear infinite;
}
@keyframes drift{to{background-position:160px 0,0 0,0 0}}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
p{margin:0 0 1em}
h1,h2,h3{font-family:var(--serif);line-height:1.22;margin:0;letter-spacing:.02em}
strong{font-weight:700}

.bar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,243,255,.9);
  backdrop-filter:blur(14px);
  border-bottom:2px solid var(--ink);
}
.bar__in{
  max-width:1180px;
  margin:0 auto;
  padding:0 16px;
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.mark{
  font-family:var(--serif);
  font-size:19px;
  font-weight:700;
  letter-spacing:.1em;
  white-space:nowrap;
  padding:8px 2px;
}
.mark:hover{color:var(--vio)}
.bar__r{display:flex;align-items:center;gap:8px;margin-left:auto}
.jump{display:none}
.jump ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.jump a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:6px 10px;
  font-size:14px;
  font-weight:500;
  border-radius:999px;
  transition:background 220ms ease,color 220ms ease;
}
.jump a:hover{background:var(--ink);color:#fff}

.ping{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:6px 14px;
  border:2px solid var(--ink);
  border-radius:999px;
  font-size:14px;
  font-weight:700;
  transition:background 220ms ease,color 220ms ease,transform 220ms ease;
}
.ping:hover{background:var(--mag);border-color:var(--mag);color:#fff;transform:translateY(-2px)}
.ping__dot{width:9px;height:9px;border-radius:50%;background:var(--mag);box-shadow:0 0 0 4px rgba(191,0,255,.22)}
.ping:hover .ping__dot{background:#fff;box-shadow:0 0 0 4px rgba(255,255,255,.28)}

.burger{
  width:44px;height:44px;
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:6px;
  border:2px solid var(--ink);
  border-radius:50%;
  background:var(--vio);
  cursor:pointer;
  padding:0;
  transition:background 220ms ease,transform 220ms ease;
}
.burger span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform 220ms ease}
.burger:hover{background:var(--mag);transform:rotate(-6deg)}
.burger[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg)}

.veil{
  position:fixed;
  inset:0;
  z-index:55;
  background:linear-gradient(150deg,var(--ink) 0%,#2a1445 55%,var(--vio) 100%);
  color:#f4edff;
  transform:translateY(-102%);
  transition:transform 280ms cubic-bezier(.6,.05,.3,1);
  overflow:auto;
  overscroll-behavior:contain;
}
.veil.is-open,body.nav-open .veil{transform:none}
.veil__in{max-width:720px;margin:0 auto;padding:96px 20px 56px}
.veil__list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.veil__list a{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:56px;
  padding:8px 12px;
  border-radius:16px;
  font-family:var(--serif);
  font-size:clamp(20px,5.4vw,28px);
  border-bottom:1px solid rgba(255,255,255,.14);
  transition:background 220ms ease,color 220ms ease,padding 220ms ease;
}
.veil__list b{font-family:var(--sans);font-size:13px;font-weight:700;letter-spacing:.14em;color:#c9a9ff}
.veil__list a:hover{background:rgba(255,255,255,.1);color:#fff;padding-left:20px}
.veil__end{margin-top:26px}
.veil__end a{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:10px 24px;
  border:2px solid #fff;
  border-radius:999px;
  font-weight:700;
}
.veil__end a:hover{background:#fff;color:var(--ink)}

main{
  max-width:1180px;
  margin:0 auto;
  padding:22px 16px 56px;
}

.hero{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  padding:8px 0 22px;
  border-bottom:2px solid var(--ink);
}
.hero__copy{grid-column:1/-1;position:relative;padding-bottom:10px}
.chip{
  display:inline-block;
  margin:0 0 12px;
  padding:4px 13px;
  border-radius:999px;
  background:var(--ink);
  color:#fff;
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
}
h1{
  font-size:clamp(30px,8.4vw,54px);
  font-weight:700;
  margin:0 0 14px;
  letter-spacing:.005em;
}
.lead{
  max-width:58ch;
  margin:0 0 18px;
  color:#4a3f63;
  font-size:16px;
}
.btn{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:10px 28px;
  border-radius:999px;
  background:var(--vio);
  color:#fff;
  font-weight:700;
  letter-spacing:.04em;
  border:2px solid var(--ink);
  box-shadow:5px 5px 0 var(--ink);
  transition:background 220ms ease,transform 220ms ease,box-shadow 220ms ease;
}
.btn:hover{background:var(--mag);transform:translate(-2px,-2px);box-shadow:8px 8px 0 var(--ink)}
.stamp{
  position:absolute;
  top:2px;
  right:0;
  padding:5px 13px;
  border-radius:999px;
  background:var(--mag);
  color:#fff;
  border:2px solid var(--ink);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  transform:rotate(-5deg);
  white-space:nowrap;
}

.art{
  margin:0;
  position:relative;
  overflow:hidden;
  border-radius:var(--r);
  border:2px solid var(--ink);
  background:linear-gradient(150deg,var(--vio),var(--mag));
  aspect-ratio:4/5;
}
.art img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.08)}
.art::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(101,20,255,.55),rgba(28,23,38,.3));
  mix-blend-mode:multiply;
}

.deck{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  padding-top:34px;
}

.stack > section{
  position:relative;
  overflow:hidden;
  margin:0 0 26px;
  padding:26px 18px 30px;
  background:#fff;
  border:2px solid var(--ink);
  border-radius:var(--r);
  scroll-margin-top:96px;
  animation:rise .45s ease both;
}
.stack > section:nth-child(2){animation-delay:.05s}
.stack > section:nth-child(3){animation-delay:.1s}
.stack > section:nth-child(4){animation-delay:.15s}
.stack > section:nth-child(5){animation-delay:.2s}
.stack > section:nth-child(6){animation-delay:.25s}
.stack > section:nth-child(7){animation-delay:.3s}
.stack > section:nth-child(3n+2){background:linear-gradient(180deg,#f3ecff,#fff 62%)}
.stack > section::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:8px;
  background:linear-gradient(90deg,var(--vio),var(--mag));
}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.stack h2{
  font-size:clamp(23px,5.4vw,32px);
  margin:0 0 20px;
  padding-bottom:6px;
}
.stack h2 > span,.stack h3 > span{display:inline-block;position:relative}
.stack h2 > span::after{
  content:"";
  position:absolute;
  left:-2px;right:-2px;bottom:2px;
  height:9px;
  border-radius:5px;
  background:var(--mag);
  opacity:.28;
}
.stack h3{
  font-size:clamp(19px,4.6vw,24px);
  margin:26px 0 12px;
}
.stack h3 > span::after{
  content:"";
  position:absolute;
  left:-4px;top:-2px;bottom:-2px;width:5px;
  border-radius:4px;
  background:var(--vio);
}
.stack p{margin:0 0 1em}
.stack ul,.stack ol{margin:0 0 1.2em;padding-left:1.35em}
.stack li{margin:0 0 .45em}
.stack a{color:var(--vio);text-decoration:underline;text-underline-offset:3px;font-weight:500}
.stack a:hover{color:var(--mag)}
.stack strong{background:linear-gradient(transparent 62%,rgba(191,0,255,.25) 62%)}
.stack blockquote{
  margin:0 0 1.2em;
  padding:14px 16px;
  border-left:6px solid var(--mag);
  border-radius:0 18px 18px 0;
  background:#f7f1ff;
  font-family:var(--serif);
}
.stack blockquote p:last-child{margin:0}
.stack figure{margin:0 0 1.2em;border-radius:18px;overflow:hidden;border:2px solid var(--ink)}
.stack img{border-radius:0}
.stack table{width:100%;border-collapse:collapse;margin:0 0 1.2em;font-size:15px}
.stack th,.stack td{border:1px solid var(--line);padding:9px 10px;text-align:left}
.stack th{background:#f3ecff}

.rail{
  border:2px solid var(--ink);
  border-radius:var(--r);
  background:var(--ink);
  color:#ece3ff;
  padding:20px 16px 22px;
  align-self:start;
}
.rail__h{font-size:17px;letter-spacing:.16em;color:#fff;margin:0 0 14px}
.rail__list{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.rail__list a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:6px 8px;
  border-radius:12px;
  font-size:15px;
  transition:background 220ms ease,transform 220ms ease,color 220ms ease;
}
.rail__list b{font-family:var(--serif);font-size:13px;color:#c39bff;letter-spacing:.08em}
.rail__list a:hover{background:var(--vio);color:#fff;transform:translateX(3px)}
.rail__list a:hover b{color:#fff}
.rail__fig{margin:14px 0 0;border-radius:18px;overflow:hidden;border:2px solid rgba(255,255,255,.35)}
.rail__fig img{width:100%;object-fit:cover}

.foot{
  border-top:2px solid var(--ink);
  background:#fff;
}
.foot__in{
  max-width:1180px;
  margin:0 auto;
  padding:26px 16px 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:16px 26px;
  text-align:center;
}
.foot__mark{
  display:inline-block;
  font-family:var(--serif);
  font-size:clamp(24px,6vw,38px);
  font-weight:700;
  letter-spacing:.06em;
  padding:4px 0;
  transition:color 220ms ease;
}
.foot__mark:hover{color:var(--vio)}
.foot__nav{padding:0}
.foot__h{font-size:13px;letter-spacing:.2em;margin:0 0 6px;color:#5f5378}
.foot__nav dl{margin:0;display:flex;flex-wrap:wrap;gap:0 14px;justify-content:center}
.foot__nav dt{margin:0}
.foot__nav dt a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:15px;
  font-weight:700;
  transition:color 220ms ease;
}
.foot__nav dt a:hover{color:var(--mag)}
.foot__nav dd{margin:0;display:none}
.foot__nav dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:13px;
  color:#655a7c;
  padding-left:10px;
  border-left:1px solid var(--line);
}
.foot__nav dd a:hover{color:var(--vio)}
.foot__meta{display:flex;flex-direction:column;align-items:center;gap:6px}
.foot__copy{margin:0;font-size:14px;color:#655a7c}
.totop{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:6px 16px;
  border:2px solid var(--ink);
  border-radius:999px;
  font-size:13px;
  font-weight:700;
  transition:background 220ms ease,color 220ms ease;
}
.totop:hover{background:var(--ink);color:#fff}

@media (min-width:600px){
  .foot__nav dd{display:block}
  .foot__nav a,.foot__nav dd a{min-height:44px}
  .stack > section{padding:32px 28px 36px}
}
@media (min-width:760px){
  main{padding:28px 24px 72px}
  h1{font-size:clamp(38px,6vw,56px)}
  .hero{grid-template-columns:1.25fr .5fr .5fr;gap:18px;padding-bottom:28px;align-items:stretch}
  .hero__copy{grid-column:auto;align-self:center}
  .art--a{align-self:start;margin-top:6px}
  .art--b{transform:translateY(26px)}
  .deck{gap:44px}
  .foot__in{justify-content:space-between;text-align:left;gap:22px 32px}
  .foot__meta{align-items:flex-end}
}
@media (min-width:960px){
  .deck{grid-template-columns:minmax(0,1fr) 292px;gap:48px;padding-top:44px}
  .rail{position:sticky;top:88px}
  .stack > section{padding:38px 34px 44px;margin-bottom:32px}
}
@media (min-width:1040px){
  .bar__in{display:grid;grid-template-columns:1fr auto 1fr;padding:0 22px}
  .jump{display:block}
  .jump--l ul{justify-content:flex-start}
  .jump--r ul{justify-content:flex-end}
  .bar__r{margin-left:0;justify-self:end}
  .mark{justify-self:center;text-align:center;font-size:21px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

button[aria-expanded]{min-width:44px;min-height:44px}