body {
  background: #050505;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: Poppins, sans-serif;
}

.container {
  display: flex;
  gap: 70px;
  flex-wrap: wrap;
  width: 900px;
  justify-content: center;
}

/* ----------------------------------
   BUTTON 1 — NEON GLOW ANIMATION
---------------------------------- */

.btn-neon {
  padding: 18px 50px;
  font-size: 22px;
  color: #00eaff;
  background: transparent;
  border: 2px solid #00eaff;
  letter-spacing: 3px;
  cursor: pointer;
  position: relative;
  transition: 0.4s;
  overflow: hidden;
}

.btn-neon:hover {
  color: #050505;
  background: #00eaff;
  box-shadow: 0 0 20px #00eaff, 0 0 40px #00eaff;
}

.btn-neon::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  top: -100%;
  left: 0;
  background: #00eaff;
  animation: neon-slide 1.2s linear infinite;
}

@keyframes neon-slide {
  0% {
    top: -100%;
  }
  50% {
    top: 0%;
  }
  100% {
    top: 100%;
  }
}

/* ----------------------------------
   BUTTON 2 — GRADIENT SWIPE
---------------------------------- */

.btn-swipe {
  padding: 18px 55px;
  background: linear-gradient(90deg, #ff00c8, #007bff);
  border: none;
  color: #fff;
  font-size: 22px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: 0.3s;
}

.btn-swipe::after {
  content: "";
  position: absolute;
  height: 120%;
  width: 0%;
  top: 0;
  left: 0;
  background: #fff;
  opacity: 0.1;
  transform: skewX(-25deg);
}

.btn-swipe:hover::after {
  width: 180%;
  transition: 0.5s;
}

.btn-swipe:hover {
  transform: scale(1.05);
}

/* ----------------------------------
   BUTTON 3 — 3D PRESS + PULSE
---------------------------------- */

.btn-3d {
  padding: 20px 60px;
  background: #111;
  color: #0af;
  border: 2px solid #0af;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 3px;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  transition: 0.2s;
  box-shadow: 0 0 15px #0af;
  animation: pulse 2s infinite;
}

.btn-3d:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 25px #0af, 0 0 60px #0af;
}

.btn-3d:active {
  transform: translateY(2px);
  box-shadow: 0 0 10px #0af inset;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 10px #0af;
  }
  50% {
    box-shadow: 0 0 25px #0af;
  }
  100% {
    box-shadow: 0 0 10px #0af;
  }
}

/* ----------------------------------
   BUTTON 4 — COLOR FILL ANIMATION
---------------------------------- */

.btn-fill {
  padding: 18px 45px;
  font-size: 22px;
  border: 2px solid #ff4eff;
  background: transparent;
  color: #ff4eff;
  letter-spacing: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: 0.4s;
}

.btn-fill::before {
  content: "";
  position: absolute;
  height: 100%;
  width: 0%;
  left: 0;
  top: 0;
  background: #ff4eff;
  z-index: -1;
  transition: 0.4s;
}

.btn-fill:hover::before {
  width: 100%;
}

.btn-fill:hover {
  color: #050505;
}

/* ----------------------------------
   BUTTON 5 — OUTLINE FLASH
---------------------------------- */

.btn-outline {
  padding: 18px 50px;
  font-size: 22px;
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: 0.3s;
}

.btn-outline:hover {
  box-shadow: 0 0 15px #fff, 0 0 30px #fff;
  transform: scale(1.08);
}

/* ----------------------------------
   BUTTON 6 — WAVE EFFECT (KEYFRAMES)
---------------------------------- */

.btn-wave {
  padding: 18px 55px;
  font-size: 22px;
  background: #131313;
  color: #0ff;
  border: 2px solid #0ff;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-wave::after {
  content: "";
  position: absolute;
  width: 0%;
  height: 4px;
  left: 0;
  bottom: 0;
  background: #0ff;
  animation: wave 1.5s infinite;
}

@keyframes wave {
  0% {
    width: 0%;
  }
  50% {
    width: 100%;
  }
  100% {
    width: 0%;
  }
}