.main-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 1.2em;
}

.main-container h2 {
    color: var(--th-text-1);
    text-align: center;
    font-size: clamp(1rem, calc(var(--ft-size-3) + 1vw), 2.4rem);
}

.box-config {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 1.2em;
}

.box-config h3 {
    color: var(--th-text-1);
    text-align: center;
    font-size: clamp(1rem, calc(var(--ft-size-2) + 1vw), 1.6rem);
}

.select-wrapper {
  position: relative;
  display: inline-block;
}

.select-wrapper::after {
  content: "";
  position: absolute;
  right: 0.8em;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;

  /* triângulo para baixo */
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--th-text-1);

  transition: transform 0.2s ease;
}

.select-difficulty {
    min-width: 200px;
    max-width: 400px;
    padding: 0.7em 1em;
    
    border: 2px solid var(--cl-th-bg-gray);
    border-radius: 0.4em;
    
    cursor: pointer;
    appearance: none;
    position: relative;
    
    background-color: var(--th-background-1);

    color: var(--th-text-1);
    text-align: left;
    font-size: calc(1rem + 0.1vw);
    font-weight: 500;
}

.select-difficulty option {
    background-color: var(--th-background-1);
}