/* 401.html の <style> の最後あたりにそのまま追加 */
.night-sign{
  width: min(100%, 900px);
  margin: 110px auto 0;
  padding: 0 24px;
  box-sizing: border-box;
  --sign-rgb: 127,220,255;
  --sign-bg: rgba(7, 10, 18, 0.92);
}

.night-sign__frame{
  position: relative;
  max-width: 560px;
  margin: 0 auto;
  padding: 22px 20px 18px;
  border-radius: 22px;
  border: 1px solid rgba(var(--sign-rgb), 0.40);
  background:
    radial-gradient(circle at top, rgba(var(--sign-rgb),0.12), transparent 38%),
    linear-gradient(180deg, rgba(10, 14, 24, 0.98), rgba(5, 7, 12, 0.98));
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 0 18px rgba(var(--sign-rgb), 0.16),
    0 0 42px rgba(var(--sign-rgb), 0.08);
}

.night-sign__frame::before{
  content:"";
  position:absolute;
  inset: 8px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.05);
  pointer-events:none;
}

.night-sign__top{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.night-sign__icon{
  font-size: 1.9rem;
  line-height: 1;
  text-shadow:
    0 0 10px rgba(var(--sign-rgb),0.45),
    0 0 24px rgba(var(--sign-rgb),0.18);
}

.night-sign__label{
  color: #eefaff;
  font-size: clamp(1.08rem, 2.7vw, 1.45rem);
  letter-spacing: 0.08em;
  text-align: center;
  text-shadow:
    0 0 10px rgba(var(--sign-rgb),0.18),
    0 0 24px rgba(var(--sign-rgb),0.08);
}

.night-sign__count-wrap{
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  margin: 8px 0 18px;
}

.night-sign__count{
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--sign-color-2);
  text-shadow:
    0 0 10px rgba(var(--sign-rgb),0.35),
    0 0 26px rgba(var(--sign-rgb),0.18);
}

.night-sign__unit{
  font-size: 1rem;
  color: rgba(232, 240, 255, 0.84);
  transform: translateY(-0.15em);
}

.night-sign__button{
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid rgba(var(--sign-rgb),0.48);
  background:
    linear-gradient(180deg, rgba(14, 20, 32, 0.95), rgba(8, 10, 16, 0.95));
  color: #f5fbff;
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 0 14px rgba(var(--sign-rgb),0.14);
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.night-sign__button:hover{
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 0 18px rgba(var(--sign-rgb),0.18);
}

.night-sign__button:active{
  transform: translateY(0);
}

.night-sign__button:disabled{
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.night-sign__status{
  margin-top: 12px;
  text-align: center;
  font-size: 0.92rem;
  line-height: 1.6;
  color: rgba(232, 240, 255, 0.72);
  min-height: 1.6em;
}

.night-sign.is-locked .night-sign__label,
.night-sign.is-locked .night-sign__icon{
  text-shadow:
    0 0 10px rgba(var(--sign-rgb),0.18),
    0 0 20px rgba(var(--sign-rgb),0.08);
}

.night-sign.is-pressed .night-sign__frame{
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 0 24px rgba(var(--sign-rgb),0.20),
    0 0 52px rgba(var(--sign-rgb),0.10);
}

@media (max-width: 760px){
  .night-sign{
    margin-top: 88px;
    padding: 0 14px;
  }

  .night-sign__frame{
    padding: 20px 16px 16px;
  }
}