/* Intro / Loading Sequence */
.intro-active {
  overflow: hidden !important;
}

.intro {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-2xl);
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.intro--leaving {
  opacity: 0;
}

.intro--done {
  visibility: hidden;
  pointer-events: none;
}

/* Heartbeat pulse */
.intro__heartbeat {
  width: 60px;
  height: 60px;
  position: relative;
}

.intro__heartbeat::before,
.intro__heartbeat::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--color-crimson);
}

.intro__heartbeat::before {
  animation: heartbeatPulse 1s ease-in-out infinite;
}

.intro__heartbeat::after {
  animation: heartbeatPulse 1s ease-in-out infinite 0.2s;
}

.intro__heartbeat-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  background: var(--color-crimson);
  border-radius: 50%;
  animation: heartbeatDot 1s ease-in-out infinite;
}

@keyframes heartbeatPulse {
  0% {
    transform: scale(0.3);
    opacity: 1;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes heartbeatDot {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.5); }
}

/* Intro text */
.intro__text {
  font-family: var(--font-serif);
  font-size: clamp(0.9rem, 3.5vw, 1.3rem);
  font-style: italic;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0 var(--space-md);
  max-width: 100%;
}

.intro__char {
  display: inline-block;
  opacity: 0;
  transform: translateY(10px);
  animation: introCharReveal 0.5s var(--ease-out-expo) both;
}

.intro__char--space {
  width: 0.3em;
}

@keyframes introCharReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 375px) {
  .intro__text {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
  }

  .intro__heartbeat {
    width: 44px;
    height: 44px;
  }
}