.md-header__button.md-logo img, .md-header__button.md-logo svg {
    height: 4rem;
/*    width: 3.4rem;*/
}

.md-header__topic {
    text-align: center;
    width: 100%;
    display: block;
}

.md-header {
    background: radial-gradient(circle at center, #1c2c3a 0%, #0f1b26 100%);
    color: white;
}

.md-tabs {
    background: radial-gradient(circle at center, #1c2c3a 0%, #0f1b26 100%);
}

.md-header__button.md-logo img {
    filter: drop-shadow(0 0 2px rgba(255, 255, 255, 0.6));
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

img.emoji {
  display: inline;
  margin-left: 0;
  margin-right: 0;
}

img.nocenter {
  display: inline;
  margin-left: 0;
  margin-right: 0;
}

img.fullwidth {
    width: 100%;
    height: auto;
    display: block;
    margin: 1em 0;
}