* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
}

body,
html {
  height: 100%;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.background {
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top left, #4ade80, #3b82f6, #0ea5e9);
  filter: blur(100px);
  z-index: 0;
  opacity: 0.3;
}

.card {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
  border-radius: 20px;
  padding: 40px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  color: #fff;
}

h1 {
  font-size: 2rem;
  margin-bottom: 12px;
  color: #4ade80;
}

.subtitle {
  font-size: 0.95rem;
  color: #e2e8f0;
  margin-bottom: 25px;
}

button {
  background-color: #22c55e;
  color: white;
  border: none;
  padding: 14px 20px;
  font-size: 1rem;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s ease;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.4);
}

button:hover {
  background-color: #16a34a;
}

#emailBox {
  animation: fadeIn 0.5s ease;
}

.label {
  font-weight: 600;
  margin-bottom: 5px;
  color: #a5f3fc;
}

.email {
  font-size: 1rem;
  font-weight: bold;
  color: #fef08a;
  margin-bottom: 15px;
}

.inbox-btn {
  display: inline-block;
  padding: 10px 16px;
  background: #3b82f6;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.3s ease;
  font-size: 0.95rem;
}

.inbox-btn:hover {
  background: #2563eb;
}

.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}