/* ============================================
   ANIMATION.CSS - キラキラ演出アニメーション
   ============================================ */

/* ---- Keyframes ---- */

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

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

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(99,102,241,0.4), 0 0 30px rgba(99,102,241,0.2); }
  50%       { box-shadow: 0 0 20px rgba(99,102,241,0.8), 0 0 60px rgba(99,102,241,0.4); }
}

@keyframes pulse-glow-green {
  0%, 100% { box-shadow: 0 0 10px rgba(34,197,94,0.4), 0 0 30px rgba(34,197,94,0.2); }
  50%       { box-shadow: 0 0 20px rgba(34,197,94,0.8), 0 0 60px rgba(34,197,94,0.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

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

@keyframes twinkle {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%       { opacity: 0.3; transform: scale(0.5); }
}

@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes border-dance {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes ripple {
  0%   { transform: scale(0); opacity: 0.8; }
  100% { transform: scale(3); opacity: 0; }
}

@keyframes typing {
  from { width: 0; }
  to   { width: 100%; }
}

@keyframes blink-cursor {
  0%, 100% { border-color: transparent; }
  50%       { border-color: #6366f1; }
}

@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

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

@keyframes welcome-text {
  0%   { opacity: 0; letter-spacing: 0.5em; filter: blur(8px); }
  60%  { opacity: 1; letter-spacing: 0.15em; filter: blur(0); }
  100% { opacity: 1; letter-spacing: 0.15em; filter: blur(0); }
}

@keyframes scanline {
  0%   { top: -10%; }
  100% { top: 110%; }
}

@keyframes stardust {
  0%   { opacity: 0; transform: translateY(0) scale(0); }
  20%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(-80px) scale(1.5); }
}

/* ---- Utility Classes ---- */

.fade-in          { animation: fadeIn       0.6s ease forwards; }
.fade-in-up       { animation: fadeInUp     0.7s ease forwards; }
.fade-in-down     { animation: fadeInDown   0.6s ease forwards; }
.fade-in-scale    { animation: fadeInScale  0.6s ease forwards; }
.float-anim       { animation: float        3s ease-in-out infinite; }
.pulse-glow-anim  { animation: pulse-glow   2s ease-in-out infinite; }

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }
.delay-8 { animation-delay: 0.8s; }

.shimmer-text {
  background: linear-gradient(
    90deg,
    #fff 0%,
    #6366f1 30%,
    #a5b4fc 50%,
    #6366f1 70%,
    #fff 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

.gradient-animated {
  background: linear-gradient(270deg, #6366f1, #8b5cf6, #22c55e, #6366f1);
  background-size: 300% 300%;
  animation: gradient-shift 4s ease infinite;
}

/* ---- Stars / Twinkle ---- */

.star {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  animation: twinkle var(--dur, 2s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

/* ---- Page transition overlay ---- */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  background: #0f172a;
  z-index: 9999;
  pointer-events: none;
  animation: fadeIn 0.4s ease;
}
.page-transition-overlay.out {
  animation: fadeIn 0.4s ease reverse forwards;
}