* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  background: #06090c;
  color: #e8f3f6;
  font-family: "Cascadia Code", "JetBrains Mono", Consolas, Menlo, "Courier New", monospace;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg span {
  position: absolute;
  width: 58vmax;
  height: 58vmax;
  border-radius: 50%;
  filter: blur(100px);
  mix-blend-mode: screen;
}

.bg .b1 {
  left: -16%;
  top: -20%;
  background: radial-gradient(circle at 40% 40%, rgba(0, 160, 190, 0.16), transparent 65%);
  animation: bgDrift1 26s ease-in-out infinite alternate;
}

.bg .b2 {
  right: -16%;
  bottom: -24%;
  background: radial-gradient(circle at 60% 60%, rgba(150, 60, 160, 0.12), transparent 65%);
  animation: bgDrift2 32s ease-in-out infinite alternate;
}

@keyframes bgDrift1 {
  to { transform: translate(4vw, 3vh) scale(1.08); }
}

@keyframes bgDrift2 {
  to { transform: translate(-4vw, -3vh) scale(1.05); }
}

.grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, black 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, black 25%, transparent 78%);
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 90% 80% at 50% 45%, transparent 55%, rgba(0, 2, 5, 0.6) 100%);
}

.stage {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  gap: 1.3rem;
  width: min(94vw, 680px);
  min-height: 100dvh;
}

.actor {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  width: 100%;
}

/* 共通ロゴ */
.logo {
  position: relative;
  font-size: clamp(1.8rem, 7.5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  user-select: none;
  white-space: nowrap;
  text-shadow: 0 0 18px rgba(140, 210, 230, 0.18);
}

.logo .char {
  display: inline-block;
  min-width: 0.62em;
}

.logo .scramble {
  color: rgba(159, 220, 236, 0.38);
}

.logo .locked {
  color: #f2fbfd;
}

.tok {
  animation: tokIn 0.35s ease both;
}

@keyframes tokIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.caret {
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-54%);
  width: 0.09em;
  height: 1.05em;
  margin-left: 0.1em;
  background: #9fdcec;
  box-shadow: 0 0 12px rgba(159, 220, 236, 0.7);
  animation: blink 0.9s steps(2) infinite;
  transition: opacity 0.8s ease;
}

.caret.done {
  animation: none;
  opacity: 0;
}

@keyframes blink {
  50% { opacity: 0; }
}

.logo .tk {
  display: inline-block;
  padding: 0.06em 0.14em;
  margin: 0 0.1em;
  border: 1px solid rgba(0, 240, 255, 0.35);
  border-radius: 10px;
  background: rgba(0, 240, 255, 0.05);
  transition: border-color 0.9s ease, background 0.9s ease, margin 0.9s ease, padding 0.9s ease;
}

.logo .tk:nth-child(even) {
  border-color: rgba(255, 43, 209, 0.3);
  background: rgba(255, 43, 209, 0.05);
}

.logo.merged .tk {
  border-color: transparent;
  background: transparent;
  margin: 0;
  padding: 0.06em 0;
}

.ids {
  position: absolute;
  top: calc(100% + 1.4rem);
  left: 50%;
  translate: -50% 0;
  white-space: nowrap;
  display: flex;
  gap: 1.6em;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: rgba(159, 220, 236, 0.7);
  min-height: 1.4em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  font-variant-numeric: tabular-nums;
}

.ids.show {
  opacity: 1;
  transform: none;
}

.ids.hide {
  opacity: 0;
}

.logo .ch {
  padding: 0.04em 0.09em;
  border-radius: 8px;
  background: rgba(0, 240, 255, 0);
  transition: background 0.8s ease;
}

.weights {
  position: absolute;
  top: calc(100% + 1.2rem);
  left: 50%;
  translate: -50% 0;
  white-space: nowrap;
  display: flex;
  font-size: 0.68rem;
  font-weight: 600;
  color: rgba(159, 220, 236, 0.7);
  min-height: 1.4em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  font-variant-numeric: tabular-nums;
}

.weights.show {
  opacity: 1;
  transform: none;
}

.weights.hide {
  opacity: 0;
}

.weights span {
  display: inline-block;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .bg span { animation: none; }
  .tok, .caret { animation: none; }
  .logo .tk, .logo .ch, .ids, .weights { transition: none; }
}