html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #1e3a8a, #ff5e99);
  color: white;
  overflow-x: hidden;
}

.container {
  position: relative;
  width: 100vw;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: start;
  padding: 2rem 0;
  overflow: hidden;
}

#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  filter: blur(1px);
  opacity: 0.6;
  z-index: 0;
  pointer-events: none;
}

.card {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
  padding: 4rem 2rem;
  max-width: 600px;
  width: 90%;
  text-align: center;
  overflow: hidden;
}

.logo-img {
  width: 160px;
  margin-bottom: 1.5rem;
}

.spongle-title {
  font-size: 3rem;
  margin-bottom: 0.25rem;
}

.coming-soon {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: #dddddd;
}

.tagline {
  font-size: 1.1rem;
  color: #eeeeee;
  margin-bottom: 2rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

form input[type="email"] {
  padding: 1rem;
  border-radius: 10px;
  border: none;
  font-size: 1rem;
  width: 100%;
  max-width: 400px;
}

form button {
  background-color: #2563eb;
  border: none;
  border-radius: 10px;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  box-shadow: 0 0 16px rgba(59, 130, 246, 0.4);
}

form button:hover {
  background-color: #1e40af;
}

.success-message {
  display: none;
  margin-top: 1.5rem;
  color: #90ffb0;
  font-size: 1rem;
}

.success-message.show {
  display: block;
}

.tick-icon {
  color: #00ff88;
  font-weight: bold;
  margin-right: 0.3rem;
}

.footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Enable scroll on mobile only */
@media screen and (max-width: 768px) {
  html, body {
    overflow-y: auto;
  }

  .container {
    align-items: flex-start;
    padding: 2rem 0;
  }

  .card {
    margin: auto;
  }
}