body {
  background: linear-gradient(145deg, #1f3a66 0%, #11264f 52%, #081d42 100%);
  color: #e5eefc;
  font-family: "Verdana", Geneva, Tahoma, sans-serif;
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
.container {
  text-align: center;
  border: 3px solid #73a9e6;
  border-radius: 16px;
  padding: 30px;
  width: min(90%, 560px);
  box-shadow: 0 0 16px rgba(28, 80, 143, 0.5), inset 0 0 12px rgba(255, 255, 255, 0.1);
  background: radial-gradient(circle at top left, rgba(149, 192, 235, 0.25), rgba(11, 33, 64, 0.92));
  transform: scale(1.2);
}
h1 {
  margin: 0 0 12px;
  font-size: 2.6rem;
  color: #ffffff;
  text-shadow: 2px 2px 0 #0a1e3d, 0 0 14px rgba(79, 150, 248, 0.9);
}
.tagline {
  margin: 0 0 2rem;
  font-size: 1.1rem;
  color: #d6e7ff;
}
.btn {
  display: inline-block;
  margin: 0.5rem;
  padding: 0.9rem 1.4rem;
  border-radius: 12px;
  border: 2px solid #7ab7f3;
  background: linear-gradient(180deg, #4a8bbe 0%, #2467a2 100%);
  color: #f0f9ff;
  font-weight: bold;
  text-decoration: none;
  font-size: 1.04rem;
  letter-spacing: 0.04em;
  box-shadow: 0 5px 0 #163f6a, 0 8px 16px rgba(0, 0, 0, 0.45);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 #163f6a, 0 10px 20px rgba(0, 0, 0, 0.5);
}
.btn:active {
  transform: translateY(1px);
  box-shadow: 0 3px 0 #163f6a, 0 6px 12px rgba(0, 0, 0, 0.35);
}
.note {
  margin-top: 1.25rem;
  color: #a9c5e8;
  font-size: 0.86rem;
}
.cursor {
  animation: blink 1s infinite;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@media (max-width: 768px) {
  .container {
    padding: 20px;
    transform: scale(1);
  }
  h1 {
    font-size: 2rem;
  }
  .tagline {
    font-size: 1rem;
  }
  .btn {
    padding: 0.7rem 1.2rem;
    font-size: 0.95rem;
  }
  .note {
    font-size: 0.8rem;
  }
}