@font-face {
  font-family: 'NotoSansJP';
  src: url('../assets/fonts/Noto_Sans_JP/static/NotoSansJP-Bold.ttf') format('truetype');
  font-weight: bold;
  font-style: normal;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "CustomFont", "Poppins", sans-serif;
}

body {
  height: 100vh;
  background: url('./assets/images/black.jpg') no-repeat center center/cover;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  font-family: 'NotoSansJP', sans-serif;
}

.jp {
  font-family: 'NotoSansJP', sans-serif;
  font-weight: bold;
  font-size: 2rem;
  color: #ffcb05;
}

.overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 0;
}

.container {
  text-align: center;
  z-index: 1;
  padding: 50px;
  border-radius: 20px;
  animation: fadeIn 1.2s ease-in-out forwards;
}

h1 {
  font-size: 2.8rem;
  margin-bottom: 15px;
  animation: slideDown 1.2s ease;
}

h1 span {
  color: #ffcb05;
}

button.pushable {
  margin-top: 3rem;
}

.intro {
  font-size: 1.7rem;
  line-height: 1.6;
  margin-bottom: 40px;
  color: #f1f1f1;
  animation: fadeIn 1.5s ease;
}

/* ✨ Sparkle Pushable Button */
.pushable {
  position: relative;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  outline-offset: 4px;
  transition: filter 250ms;
  width: 220px;
  height: 60px;
  z-index: 5;
}

.shadow {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
  transform: translateY(3px);
  transition:
    transform 600ms cubic-bezier(0.3, 0.7, 0.4, 1),
    opacity 300ms ease-in-out;
}

.edge {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border-radius: 12px;
  background: linear-gradient(
    to left,
    hsl(50deg 100% 20%) 0%,
    hsl(50deg 100% 35%) 8%,
    hsl(50deg 100% 35%) 92%,
    hsl(50deg 100% 20%) 100%
  );
  transition: transform 600ms cubic-bezier(0.3, 0.7, 0.4, 1);
}

/* Hover: make shadow deeper & edge slightly adjust */
.pushable:hover .shadow {
  transform: translateY(4px) scale(1.10);
  opacity: 0.9;
}

.pushable:hover .edge {
  transform: scale(1.10);
}

/* Click: flatten effect */
.pushable:active .shadow {
  transform: translateY(1px) scale(0.98);
  opacity: 0.6;
}

.pushable:active .edge {
  transform: scale(0.98);
}


/* 🟡 Front face of the button */
.front {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  font-size: 1.2rem;
  font-weight: bold;
  color: black;
  background: hsl(50deg 100% 50%);
  transform: translateY(-4px);
  transition:
    transform 600ms cubic-bezier(0.3, 0.7, 0.4, 1),
    font-size 250ms ease-in-out,
    box-shadow 300ms ease-in-out;
  z-index: 2;
  animation: softPulse 2.5s infinite ease-in-out; /* always glowing softly */
}

/* When hover → stronger glow + bigger text */
.pushable:hover .front {
  transform: translateY(-6px) scale(1.1);
  font-size: 1.35rem;
  animation: strongPulse 1.5s infinite alternate ease-in-out;
  box-shadow:
    0 0 30px 10px rgba(255, 230, 100, 0.8),
    0 0 60px 20px rgba(255, 230, 100, 0.5);
}

/* When pressed → shrink + dim */
.pushable:active .front {
  transform: translateY(-2px) scale(0.98);
  font-size: 1.15rem;
  animation: none;
  box-shadow: 0 0 8px 3px rgba(255, 203, 5, 0.4);
}

/* Glow + lift hover */
.pushable:hover {
  filter: brightness(115%);
}

/* ✨ Sparkle particles */
.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: scale(0.1);
  animation: sparkleBurst 1200ms ease-out forwards;
  z-index: 10;
}

/* 💥 Sparkle burst effect */
@keyframes sparkleBurst {
  0% {
    opacity: 1;
    transform: scale(0.1);
    filter: blur(2px);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.2);
    filter: blur(3px);
  }
  100% {
    opacity: 0;
    transform: scale(3);
    filter: blur(6px);
  }
}

/* 🌟 Soft idle pulse */
@keyframes softPulse {
  0% {
    box-shadow:
      0 0 10px 3px rgba(255, 230, 100, 0.3),
      0 0 20px 8px rgba(255, 230, 100, 0.2);
  }
  50% {
    box-shadow:
      0 0 25px 10px rgba(255, 230, 100, 0.6),
      0 0 50px 18px rgba(255, 230, 100, 0.4);
  }
  100% {
    box-shadow:
      0 0 10px 3px rgba(255, 230, 100, 0.3),
      0 0 20px 8px rgba(255, 230, 100, 0.2);
  }
}

/* ⚡ Strong pulse on hover */
@keyframes strongPulse {
  0% {
    box-shadow:
      0 0 20px 6px rgba(255, 230, 100, 0.6),
      0 0 40px 12px rgba(255, 230, 100, 0.4);
  }
  50% {
    box-shadow:
      0 0 45px 15px rgba(255, 230, 100, 0.9),
      0 0 90px 30px rgba(255, 230, 100, 0.6);
  }
  100% {
    box-shadow:
      0 0 20px 6px rgba(255, 230, 100, 0.6),
      0 0 40px 12px rgba(255, 230, 100, 0.4);
  }
}

.watermark {
  position: absolute;
  font-size: 11rem;
  color: rgba(255, 255, 255, 0.05);
  top: 25%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 0;
  user-select: none;
}

footer {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  z-index: 2;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(-40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}