html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: #002366; /* тъмно син фон */
}

.logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.logo {
  max-width: 100%;
  height: auto;
}