body {
  margin: 0;
  padding: 0;
  background: #f5f7fa;
  font-family: 'Noto Sans KR', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  background: #fff;
  padding: 60px 40px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

h1 {
  margin-bottom: 40px;
  font-size: 28px;
  color: #333;
}

.login-btn {
  display: block;
  width: 280px;
  margin: 20px auto;
  padding: 15px 0;
  font-size: 18px;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  color: white;
  transition: all 0.3s;
}

.user-btn {
  background: linear-gradient(135deg, #4a90e2, #357ABD);
}

.user-btn:hover {
  background: linear-gradient(135deg, #357ABD, #2a65a0);
}

.admin-btn {
  background: linear-gradient(135deg, #2e7d32, #1b5e20);
}

.admin-btn:hover {
  background: linear-gradient(135deg, #1b5e20, #0d3f11);
}

.master-login {
  margin-top: 15px;
  font-size: 12px;
}

.master-login a {
  color: #888;
  text-decoration: none;
}

.master-login a:hover {
  text-decoration: underline;
}

.login-btn {
  display: block;
  text-align: center;
  text-decoration: none; /* 밑줄 제거 */
  color: white; /* 글자색 고정 */
  width: 280px;
  margin: 20px auto;
  padding: 15px 0;
  font-size: 18px;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}