body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  background: linear-gradient(to bottom right, #0f2027, #203a43, #2c5364);
  font-family: 'Segoe UI', sans-serif;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  text-align: center;
  animation: fadeIn 1.5s ease-in-out;
}

.logo {
  width: 60vw;
  max-width: 800px;
  min-width: 600px;
  margin-bottom: 40px;
  filter: drop-shadow(0 0 30px rgba(0, 0, 0, 0.4));
}

.enter-button {
  background-color: #1a73e8;
  color: white;
  padding: 14px 32px;
  font-size: 1.2em;
  border: none;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.3s, transform 0.3s;
}

.enter-button:hover {
  background-color: #0f5ad0;
  transform: scale(1.05);
}

.hint {
  margin-top: 20px;
  font-size: 0.95em;
  opacity: 0.7;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}