* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #0f0f0f;
  color: #e0e0e0;
  overflow: hidden;
}

.miku {
  position: fixed;
  bottom: 20px;
  right: 20px;
  opacity: 0.8;
}

.miku img {
  height: 160px;
  width: auto;
  border-radius: 8px;
}

.main {
  text-align: center;
  background-color: #1a1a1a;
  padding: 60px 50px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}

.main h1 {
  font-size: 2.4rem;
  margin-bottom: 30px;
  color: #f0f0f0;
  font-weight: 600;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 500;
  color: #0ab0e8;
  border: 2px solid #0ab0e8;
  border-radius: 8px;
  background-color: transparent;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn:hover {
  background-color: #0ab0e8;
  color: #0f0f0f;
  transform: translateY(-1px);
}

@media (max-width: 600px) {
  .main {
    padding: 40px 25px;
    width: 90%;
  }

  .main h1 {
    font-size: 1.8rem;
  }

  .miku img {
    height: 120px;
  }
}