index-soutien/assets/css/template/store/_section--product.scss

.section__product,
.store__nav {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.store__nav {
  padding-top: calc(var(--spacing) * 1);

  a {
    text-decoration: none;

    &:hover {
      text-decoration: underline;
    }
  }

  a::before {
    content: '← ';
  }
}

.section__product {
  figure {
    aspect-ratio: 1/1;

    img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
  }

  #list-size {
    list-style: none;
    display: flex;
    margin-top: calc(var(--spacing) * 0.5);
    margin-bottom: calc(var(--spacing) * 0.5);
    gap: 2ch;

    li {
      position: relative;

      input[type='radio'] {
        position: fixed;
        opacity: 0;
        pointer-events: none;
      }

      label {
        font-family: var(--title);
        font-size: var(--fs-normal);
        height: 4ch;
        width: 4ch;
        border-radius: 50%;
        border: var(--border);
        border-color: transparent;
        display: flex;
        align-items: center;
        justify-content: center;
        padding-top: 0px;
        cursor: pointer;
      }

      input[type='radio']:checked + label {
        border-color: var(--color-txt);
      }

      input[type='radio']:not(:checked) + label:hover {
        border-color: var(--grey-600);
        background-color: var(--grey-800);
      }
    }
  }

  .hero {
    margin-bottom: calc(var(--spacing) * 1);
    padding-top: calc(var(--spacing) * 0.5);
    border-top: var(--border-light);

    .p__baseline-big {
      margin: 0;
      text-align: left;
    }
  }

  .add-to-cart,
  #list-size {
    margin: 0;
    border-bottom: var(--border-light);
    padding: calc(var(--spacing) * 0.5) 0;
  }
}

@media #{$small} {
  .store__nav a {
    padding-top: 0;
    font-size: var(--fs-small);
  }

  .section__product {
    display: flex;
    flex-direction: column;

    .col-left {
      display: contents;
    }

    .hero {
      margin-top: calc(var(--spacing) * 0.5);
      order: 1;
    }
    figure {
      order: 2;
      margin-bottom: calc(var(--spacing) * 1);
    }

    .details {
      order: 3;
      margin-bottom: calc(var(--spacing) * 1.5);
    }

    .size {
      border-top: var(--border-light);
      order: 4;
    }

    .add-to-cart {
      order: 5;
    }
  }
}

@media #{$small-up} {
  .section__product {
    display: grid;
    grid-template-columns: 50% 50%;
    aspect-ratio: 2/1;

    margin-top: calc(var(--spacing) * 0.5);
    position: relative;

    .col-left {
      padding-right: var(--padding-body);
    }

    .details {
      margin-bottom: calc(var(--spacing) * 3);
    }

    .add-to-cart,
    #list-size {
      width: calc(50% - var(--padding-body));
    }

    .add-to-cart {
      position: absolute;
      bottom: 10px;
    }

    #list-size {
      position: absolute;
      bottom: calc(var(--spacing) * 2);
      border-top: var(--border-light);
    }
  }
}