.site-header {
  padding: 10px;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header .site-branding img {
  width: 100%;
  height: 30px;
}

.main-navigation {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.main-navigation .signin-button {
  background-color: #7d53de;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  padding: 5px 30px;
}

@media screen and (max-width: 768px) {
  .main-navigation .signin-button {
    width: calc(100% - 20px);
    padding: 12px 20px;
    margin: 20px 10px 0 10px;
    text-align: center;
    border-radius: 8px;
    display: block;
  }
}