.mixer-buttons button {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #1b2540;
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

.mixer-buttons button:nth-child(1) {
  background-image: url("1.png");
  background-position: center;
}

.mixer-buttons button:nth-child(2) {
  background-image: url("2.png");
  background-position: center;
}

.mixer-buttons button:nth-child(3) {
  background-image: url("3.png");
  background-position: center;
}

.mixer-buttons button:nth-child(4) {
  background-image: url("4.png");
  background-position: center;
}

.mixer-buttons button::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(10, 20, 45, .94) 0%, rgba(10, 20, 45, .74) 48%, rgba(10, 20, 45, .36) 100%);
  transition: background .2s ease;
}

.mixer-buttons button:hover,
.mixer-buttons button.is-active {
  background-color: #1b2540;
  background-position: center;
  background-size: cover;
  border-color: var(--yellow);
}

.mixer-buttons button:hover::before,
.mixer-buttons button.is-active::before {
  background: linear-gradient(90deg, rgba(23, 59, 255, .88) 0%, rgba(23, 59, 255, .52) 54%, rgba(10, 20, 45, .24) 100%);
}

.mixer-buttons button b,
.mixer-buttons button span {
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 10px rgba(0, 0, 0, .8);
}

.mixer-buttons button b {
  margin-top: 0;
}

.mixer-buttons button span {
  color: #f0f3fa;
}

@media (max-width: 800px) {
  .mixer-buttons button {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }
}