/* ===========================
   Loading Screen
   =========================== */
#loader {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease;
}

#loader.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-kanji {
  font-family: var(--font-serif-jp);
  font-size: clamp(5rem, 12vw, 10rem);
  font-weight: 300;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  animation: loaderPulse 1.5s ease forwards;
}

@keyframes loaderPulse {
  0%   { opacity: 0; transform: scale(0.95); }
  40%  { opacity: 1; transform: scale(1); }
  80%  { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.03); }
}

/* ===========================
   Fade-in on Scroll
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }
.fade-in-delay-5 { transition-delay: 0.5s; }

/* Hero staggered fade-in */
.hero-stagger > * {
  opacity: 0;
  transform: translateY(24px);
}

.hero-stagger.animate > *:nth-child(1) { animation: heroFade 0.9s ease 0.3s forwards; }
.hero-stagger.animate > *:nth-child(2) { animation: heroFade 0.9s ease 0.5s forwards; }
.hero-stagger.animate > *:nth-child(3) { animation: heroFade 0.9s ease 0.7s forwards; }
.hero-stagger.animate > *:nth-child(4) { animation: heroFade 0.9s ease 0.9s forwards; }
.hero-stagger.animate > *:nth-child(5) { animation: heroFade 0.9s ease 1.1s forwards; }

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

/* Hero line expand */
.hero-line.animate {
  animation: lineExpand 0.8s ease 0.8s forwards;
}

@keyframes lineExpand {
  from { width: 0; }
  to   { width: 240px; }
}

/* Hero SNS + scroll fade */
.hero-side-fade {
  opacity: 0;
  animation: sideFade 0.9s ease 1.4s forwards;
}

@keyframes sideFade {
  to { opacity: 1; }
}

/* Scroll line animation */
@keyframes scrollLine {
  0%   { top: -100%; }
  100% { top: 100%; }
}

/* ===========================
   Section divider animate
   =========================== */
.section-divider {
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.6s ease;
}

.section-divider.visible {
  transform: scaleX(1);
}

/* ===========================
   Hover underline slide (links)
   =========================== */
.hover-underline {
  position: relative;
  padding-bottom: 2px;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 0; height: 1px;
  background: var(--color-accent);
  transition: width 0.35s ease;
}

.hover-underline:hover::after {
  width: 100%;
  right: auto; left: 0;
}

/* ===========================
   Work card PLAY cursor label
   =========================== */
.cursor-play-text {
  position: fixed;
  font-family: var(--font-en-sans);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  pointer-events: none;
  z-index: 10002;
  opacity: 0;
  transform: translate(-50%, 20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.cursor-play-text.visible {
  opacity: 1;
  transform: translate(-50%, 18px);
}

/* ===========================
   Page reveal after loader
   =========================== */
.page-content {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.page-content.visible {
  opacity: 1;
}