/* ============================================
   婚活ラボ - Animations
   ============================================ */

/* ===== Keyframes ===== */
@keyframes loaderText {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes loaderBar {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@keyframes revealUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes revealChar {
  from { opacity: 0; transform: translateY(60%); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes floatParticle {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  25% { transform: translate(30px, -40px) scale(1.2); opacity: 0.8; }
  50% { transform: translate(-20px, -60px) scale(0.9); opacity: 0.6; }
  75% { transform: translate(20px, -30px) scale(1.1); opacity: 0.7; }
}

@keyframes bgShift {
  0%, 100% { transform: scale(1) translate(0, 0); }
  33% { transform: scale(1.05) translate(-2%, 2%); }
  66% { transform: scale(0.98) translate(2%, -2%); }
}

@keyframes floatBg {
  from { background-position: 0 0, 0 0; }
  to { background-position: 600px 600px, -400px 400px; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

@keyframes rotateSlow {
  from { transform: rotate(0); }
  to { transform: rotate(360deg); }
}

@keyframes scrollLine {
  0% { top: -30px; }
  100% { top: 60px; }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(232, 180, 184, 0.4); }
  50% { box-shadow: 0 0 40px rgba(232, 180, 184, 0.7); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Text reveal animation ===== */
.text-reveal {
  overflow: hidden;
  display: inline-block;
}

.text-reveal__inner {
  display: inline-block;
  transform: translateY(100%);
  opacity: 0;
  transition: transform 1s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 1s cubic-bezier(0.22, 1, 0.36, 1);
}

.is-visible .text-reveal__inner,
.text-reveal.is-visible .text-reveal__inner {
  transform: translateY(0);
  opacity: 1;
}

/* ===== Image mask reveal ===== */
.img-mask {
  position: relative;
  overflow: hidden;
}

.img-mask::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-rose-gold);
  transform-origin: bottom;
  transition: transform 1.4s cubic-bezier(0.77, 0, 0.175, 1);
  z-index: 1;
}

.img-mask.is-visible::after {
  transform: scaleY(0);
  transform-origin: top;
}

.img-mask img {
  transform: scale(1.2);
  transition: transform 2s cubic-bezier(0.22, 1, 0.36, 1);
}

.img-mask.is-visible img {
  transform: scale(1);
}

/* ===== Count up ===== */
.count-up {
  font-variant-numeric: tabular-nums;
}

/* ===== 3D Tilt cards ===== */
.tilt-card {
  transform-style: preserve-3d;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

/* ===== Magnetic button ===== */
.magnetic {
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

/* ===== Hover lift ===== */
.hover-lift {
  transition: transform var(--transition), box-shadow var(--transition);
}

.hover-lift:hover {
  transform: translateY(-6px);
}

/* ===== Stagger animation utility ===== */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

.stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger.is-visible > *:nth-child(2) { transition-delay: 0.15s; }
.stagger.is-visible > *:nth-child(3) { transition-delay: 0.25s; }
.stagger.is-visible > *:nth-child(4) { transition-delay: 0.35s; }
.stagger.is-visible > *:nth-child(5) { transition-delay: 0.45s; }
.stagger.is-visible > *:nth-child(6) { transition-delay: 0.55s; }
.stagger.is-visible > *:nth-child(7) { transition-delay: 0.65s; }
.stagger.is-visible > *:nth-child(8) { transition-delay: 0.75s; }

/* ===== Shimmer effect ===== */
.shimmer-text {
  background: linear-gradient(90deg,
    var(--color-rose-gold) 0%,
    var(--color-pink-light) 25%,
    var(--color-rose-gold) 50%,
    var(--color-pink-light) 75%,
    var(--color-rose-gold) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 4s linear infinite;
}

/* ===== Decorative floating circles ===== */
.deco-circle {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient-rose-gold-light);
  opacity: 0.3;
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  animation: floatY 8s ease-in-out infinite;
}

/* ===== Section transition reveal lines ===== */
.line-reveal {
  display: block;
  width: 0;
  height: 1px;
  background: var(--gradient-rose-gold);
  transition: width 1.2s cubic-bezier(0.77, 0, 0.175, 1);
}

.is-visible .line-reveal,
.line-reveal.is-visible {
  width: 100%;
}

/* ===== Smooth fade for images ===== */
img.fade-in {
  opacity: 0;
  transition: opacity 1s ease;
}

img.fade-in.is-loaded {
  opacity: 1;
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}