/* ==========================================================
   七月七日は、灯りをともす日。
   夜のトーンに振り切った単一テーマ。ライトテーマは持たない。
   ========================================================== */

:root{
  --night:      #06080D;
  --night-2:    #0B1018;
  --night-3:    #111826;
  --glow:       #FFC97A;
  --glow-hot:   #FFEBCB;
  --blue:       #5C97EC;
  --blue-deep:  #17325C;
  --ink:        #E9E5DC;
  --ink-2:      #9BA5B5;
  --ink-3:      #616D80;
  --rule:       #1A2130;

  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: clamp(1.35rem, 2.6vw, 1.75rem);
  --step-3: clamp(1.9rem, 4.4vw, 3rem);
  --step-4: clamp(2.05rem, 8.6vw, 5rem);

  --mincho: "Zen Old Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

*{ box-sizing: border-box; }

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

body{
  margin:0;
  background: var(--night);
  color: var(--ink);
  font-family: var(--gothic);
  font-size: var(--step-0);
  line-height: 2;
  -webkit-font-smoothing: antialiased;
}

a{ color: var(--blue); text-underline-offset: .25em; }
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--glow);
  outline-offset: 3px;
}

.skip{
  position:absolute; left:-9999px;
  background: var(--night-3); color: var(--ink);
  padding:.75rem 1rem; z-index:100;
}
.skip:focus{ left:1rem; top:1rem; }

/* ---------- hero ---------- */

.hero{
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
}

#lanterns{
  position:absolute; inset:0;
  width:100%; height:100%;
  z-index:-2;
  display:block;
}

.hero-fade{
  position:absolute; left:0; right:0; bottom:0; height:38vh;
  z-index:-1;
  background: linear-gradient(to bottom, transparent, var(--night) 88%);
  pointer-events:none;
}

.hero-inner{
  text-align:center;
  padding: 4rem 1.5rem;
  max-width: 46rem;
}

.eyebrow{
  font-size:.7rem;
  letter-spacing:.42em;
  color: var(--ink-3);
  margin:0 0 2.5rem;
  font-weight:700;
}

.hero h1{
  font-family: var(--mincho);
  font-weight:900;
  font-size: var(--step-4);
  line-height:1.42;
  letter-spacing:.06em;
  margin:0 0 1.75rem;
  text-wrap: balance;
  text-shadow: 0 0 60px rgba(255,201,122,.28);
}

.hero-sub{
  font-family: var(--mincho);
  font-size: var(--step-1);
  color: var(--ink-2);
  letter-spacing:.08em;
  margin:0 0 3rem;
}

.cta{
  display:inline-block;
  font-family: var(--gothic);
  font-size:.85rem;
  letter-spacing:.16em;
  font-weight:700;
  color: var(--glow-hot);
  background: transparent;
  border:1px solid rgba(255,201,122,.42);
  border-radius:2px;
  padding:.95rem 2.4rem;
  text-decoration:none;
  cursor:pointer;
  transition: background .35s ease, border-color .35s ease;
}
.cta:hover{
  background: rgba(255,201,122,.09);
  border-color: rgba(255,201,122,.8);
}
.cta:disabled{ opacity:.4; cursor:default; }

/* ---------- sections ---------- */

.sec{
  max-width: 44rem;
  margin: 0 auto;
  padding: 7rem 1.5rem;
  border-top: 1px solid var(--rule);
}
.sec:first-of-type{ border-top:none; }

.label{
  font-size:.7rem;
  letter-spacing:.3em;
  color: var(--ink-3);
  font-weight:700;
  margin:0 0 1.5rem;
}

.sec h2{
  font-family: var(--mincho);
  font-weight:600;
  font-size: var(--step-3);
  line-height:1.55;
  letter-spacing:.04em;
  margin:0 0 2rem;
  text-wrap: balance;
}

.sec h3{
  font-family: var(--gothic);
  font-size: var(--step-1);
  font-weight:700;
  margin:0 0 .5rem;
  letter-spacing:.02em;
}

.sec p{ margin:0 0 1.5rem; color: var(--ink-2); }
.sec p b{ color: var(--ink); font-weight:700; }
.sec p:last-child{ margin-bottom:0; }

.note{ font-size:.85rem; color: var(--ink-3); }

blockquote{
  font-family: var(--mincho);
  font-size: var(--step-2);
  line-height:1.95;
  color: var(--ink);
  margin: 0 0 2rem;
  padding: 1.75rem 0 1.75rem 1.75rem;
  border-left: 1px solid rgba(255,201,122,.45);
}
blockquote cite{
  display:block;
  margin-top:1.25rem;
  font-family: var(--gothic);
  font-style:normal;
  font-size:.78rem;
  color: var(--ink-3);
  letter-spacing:.04em;
}

/* ---------- 実験図版 ---------- */

.figure{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:.75rem;
  margin: 0 0 2.5rem;
}
@media (max-width:36rem){ .figure{ grid-template-columns:1fr; } }

.fig-slot{
  aspect-ratio: 3 / 4;
  background: var(--night-2);
  border:1px dashed var(--rule);
  border-radius:2px;
  display:grid;
  place-items:center;
  position:relative;
}
.fig-slot span{ font-size:.75rem; color: var(--ink-3); }
.fig-slot::after{
  content: attr(data-cap);
  position:absolute; bottom:.75rem; left:0; right:0;
  text-align:center;
  font-size:.72rem;
  color: var(--ink-3);
  letter-spacing:.06em;
}

.stats{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1.5rem;
  margin:0;
  padding:1.75rem 0 0;
  border-top:1px solid var(--rule);
}
@media (max-width:36rem){ .stats{ grid-template-columns:1fr; } }
.stats dt{
  font-size:.72rem; letter-spacing:.14em;
  color: var(--ink-3); margin-bottom:.4rem;
}
.stats dd{
  margin:0;
  font-family: var(--mincho);
  font-size: var(--step-2);
  color: var(--glow);
  font-variant-numeric: tabular-nums;
  line-height:1.4;
}
.stats dd small{
  font-family: var(--gothic);
  font-size:.75rem;
  color: var(--ink-2);
  margin-left:.35em;
  letter-spacing:.04em;
}

/* ---------- steps ---------- */

.steps{
  list-style:none;
  margin:0 0 2rem;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2.5rem;
}
.steps li{
  display:grid;
  grid-template-columns: 3.5rem 1fr;
  gap:0 1.25rem;
  align-items:start;
}
.steps .num{
  font-family: var(--mincho);
  font-size:1.5rem;
  color: var(--glow);
  line-height:1.2;
  font-variant-numeric: tabular-nums;
  opacity:.75;
}
.steps h3, .steps p{ grid-column:2; }
.steps p{ margin:0; }

/* ---------- counter ---------- */

.count{ text-align:center; }
.counter{
  font-family: var(--mincho);
  font-size: clamp(3.2rem, 13vw, 7rem);
  line-height:1.1;
  color: var(--glow-hot);
  font-variant-numeric: tabular-nums;
  margin:0 0 .5rem;
  text-shadow: 0 0 70px rgba(255,201,122,.35);
}
.counter-sub{
  font-size:.78rem;
  letter-spacing:.2em;
  color: var(--ink-3);
  margin:0 0 2.5rem;
}
.count .note{ margin-top:1.25rem; min-height:1.5em; }

.map-slot, .store-slot{
  margin-top:3rem;
  aspect-ratio: 4 / 3;
  background: var(--night-2);
  border:1px dashed var(--rule);
  border-radius:2px;
  display:grid;
  place-items:center;
}
.store-slot{ aspect-ratio: 16 / 7; }
.map-slot span, .store-slot span{ font-size:.75rem; color: var(--ink-3); }

/* ---------- footer ---------- */

.foot{
  border-top:1px solid var(--rule);
  padding: 4rem 1.5rem 6rem;
  max-width: 44rem;
  margin: 0 auto;
}
.foot-brand{
  font-size:.7rem;
  letter-spacing:.42em;
  color: var(--ink-3);
  margin:0 0 2rem;
}
.disclaimer{
  font-size:.78rem;
  line-height:1.95;
  color: var(--ink-3);
  margin:0;
  padding:1.25rem 1.5rem;
  border:1px solid var(--rule);
  border-radius:2px;
  background: var(--night-2);
}
.disclaimer b{ color: var(--ink-2); }