* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Poppins", Arial, sans-serif;
  background: #050505;
  color: #fff;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#language-switcher {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 22px;
  background-color: rgba(80, 255, 120, 0.08);
  border: 1px solid rgba(80, 255, 120, 0.2);
  border-radius: 30px;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
  font-size: 0.85rem;
  z-index: 100;
  backdrop-filter: blur(8px);
  letter-spacing: 1px;
}

#language-switcher:hover {
  background-color: rgba(80, 255, 120, 0.15);
  color: #fff;
  border-color: rgba(80, 255, 120, 0.4);
}

.content-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  position: relative;
  z-index: 10;
}

h2 {
  font-size: 3.5rem;
  margin: 0;
  color: #fff;
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
  text-shadow:
    0 0 40px rgba(60, 120, 255, 0.4),
    0 0 80px rgba(60, 120, 255, 0.15);
}

.start-button {
  display: inline-block;
  background: linear-gradient(135deg, rgba(60, 255, 100, 0.12), rgba(30, 80, 255, 0.12));
  color: #50ff78;
  padding: 22px 72px;
  font-size: 1.4rem;
  font-family: "Poppins", Arial, sans-serif;
  cursor: pointer;
  border-radius: 60px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  backdrop-filter: blur(12px);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  border: 1.5px solid rgba(80, 255, 120, 0.25);
}

.start-button:hover {
  background: linear-gradient(135deg, rgba(60, 255, 100, 0.22), rgba(30, 80, 255, 0.22));
  transform: scale(1.04);
  box-shadow:
    0 0 40px rgba(60, 255, 100, 0.2),
    0 0 80px rgba(30, 80, 255, 0.1);
  border-color: rgba(80, 255, 120, 0.5);
  color: #70ff90;
}

/* Background blobs */
.background-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: drift 12s ease-in-out infinite alternate;
}

.bg-blob--green {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #40ff60 0%, transparent 70%);
  top: 20%;
  left: 10%;
  animation-duration: 14s;
}

.bg-blob--blue {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #1a40ff 0%, transparent 70%);
  top: 40%;
  right: 5%;
  animation-duration: 18s;
  animation-delay: -4s;
}

.bg-blob--green2 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, #60ff80 0%, transparent 70%);
  bottom: 15%;
  right: 25%;
  animation-duration: 10s;
  animation-delay: -2s;
}

.bg-blob--blue2 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, #2050ff 0%, transparent 70%);
  top: 10%;
  right: 30%;
  animation-duration: 16s;
  animation-delay: -6s;
}

.light-particle {
  position: absolute;
  border-radius: 50%;
  animation: float 8s infinite;
  opacity: 0;
}

@keyframes drift {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(30px, -20px) scale(1.15);
  }
  100% {
    transform: translate(-20px, 15px) scale(0.9);
  }
}

@keyframes float {
  0% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  20% {
    opacity: 0.5;
  }
  80% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-100vh) translateX(40px);
    opacity: 0;
  }
}

@media (max-width: 768px) {
  h2 {
    font-size: 2.6rem;
    letter-spacing: 4px;
  }

  .start-button {
    padding: 20px 56px;
    font-size: 1.2rem;
  }

  .content-wrapper {
    gap: 2.5rem;
  }
}

@media (max-width: 480px) {
  h2 {
    font-size: 2rem;
    letter-spacing: 3px;
  }

  .start-button {
    padding: 18px 44px;
    font-size: 1.1rem;
    letter-spacing: 2px;
  }

  .content-wrapper {
    gap: 2rem;
  }
}