.pn-post-nav{
  margin-top:2.5rem;
  padding-top:1.5rem;
  border-top:1px solid rgba(0,0,0,.12);
}
.pn-post-nav__grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1rem;
}
.pn-post-nav__item{
  display:grid;
  grid-template-columns:auto 72px 1fr;
  align-items:center;
  gap:.75rem;
  padding:1rem;
  border:1px solid rgba(0,0,0,.12);
  border-radius:12px;
  text-decoration:none;
  transition:transform .12s ease, box-shadow .12s ease, border-color .12s ease;
  background:rgba(255,255,255,.6);
}
.pn-post-nav__item:hover,
.pn-post-nav__item:focus{
  transform:translateY(-1px);
  box-shadow:0 10px 24px rgba(0,0,0,.08);
  border-color:rgba(0,0,0,.22);
  outline:none;
}

/* NEXT: mirror layout and align arrow to the far right */
.pn-post-nav__item.is-next{
  grid-template-columns:1fr 72px auto;
}
.pn-post-nav__item.is-next .pn-post-nav__arrow{ order:3; justify-self:end; }
.pn-post-nav__item.is-next .pn-post-nav__thumb{ order:2; }
.pn-post-nav__item.is-next .pn-post-nav__text{ order:1; text-align:right; }

.pn-post-nav__item.is-prev .pn-post-nav__arrow{ justify-self:start; }

.pn-post-nav__arrow{
  width:1.5rem;
  height:1.5rem;
  position:relative;
}
.pn-post-nav__item.is-prev .pn-post-nav__arrow::before,
.pn-post-nav__item.is-next .pn-post-nav__arrow::before{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:10px;
  height:10px;
  border-top:2px solid currentColor;
  border-right:2px solid currentColor;
  transform-origin:center;
}
.pn-post-nav__item.is-prev .pn-post-nav__arrow::before{
  transform:translate(-50%,-50%) rotate(-135deg);
}
.pn-post-nav__item.is-next .pn-post-nav__arrow::before{
  transform:translate(-50%,-50%) rotate(45deg);
}

.pn-post-nav__thumb{
  width:72px;
  height:72px;
  border-radius:10px;
  overflow:hidden;
  display:block;
  background:rgba(0,0,0,.06);
}
.pn-post-nav__thumb-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.pn-post-nav__thumb-placeholder{
  width:100%;
  height:100%;
  display:block;
  background:linear-gradient(135deg, rgba(0,0,0,.06), rgba(0,0,0,.02));
}

.pn-post-nav__text{ min-width:0; }
.pn-post-nav__kicker{
  display:block;
  font-size:.75rem;
  opacity:.75;
  margin-bottom:.25rem;
  text-transform:uppercase;
  letter-spacing:.04em;
}
.pn-post-nav__title{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  font-size:1rem;
  line-height:1.25;
}

@media (max-width:700px){
  .pn-post-nav__grid{ grid-template-columns:1fr; }
  .pn-post-nav__item.is-next{ grid-template-columns:auto 72px 1fr; }
  .pn-post-nav__item.is-next .pn-post-nav__arrow,
  .pn-post-nav__item.is-next .pn-post-nav__thumb,
  .pn-post-nav__item.is-next .pn-post-nav__text{
    order:initial;
    text-align:left;
    justify-self:start;
  }
}