/* ============ REFERENCE ============ */
.reftabs{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:clamp(28px,3vw,44px);
  border-bottom:1px solid var(--line);padding-bottom:0}
.reftab{padding:14px 18px;font-family:var(--f-display);font-weight:600;font-size:.92rem;color:var(--muted);
  border-bottom:2px solid transparent;margin-bottom:-1px;transition:.3s var(--e)}
.reftab:hover{color:var(--ink)}
.reftab.is-active{color:var(--ink);border-bottom-color:var(--accent)}
.reftabs__count{margin-left:auto;font-family:var(--f-display);font-size:.82rem;color:var(--muted)}
.reftabs__count b{color:var(--accent)}

.reflayout{display:grid;grid-template-columns:240px 1fr;gap:clamp(24px,3vw,48px);align-items:start}

/* filter sidebar */
.reffilter{position:sticky;top:90px;border:1px solid var(--line);background:#fff;padding:22px 20px}
.reffilter__lock{background:var(--mist);border:1px dashed var(--line);padding:14px 14px;margin-bottom:20px}
.reffilter__lock span{font-family:var(--f-display);font-weight:700;font-size:.92rem;display:block;margin-bottom:6px}
.reffilter__lock p{font-size:.78rem;color:var(--muted);line-height:1.5}
.reffilter fieldset{border:0;padding:0;margin-bottom:20px;opacity:.5}
.reffilter legend{font-family:var(--f-display);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink);margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--line);width:100%}
.reffilter label{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:.88rem;color:var(--graphite)}
.reffilter input{accent-color:var(--accent);width:15px;height:15px}
.btn--block{width:100%;justify-content:center;opacity:.5;cursor:not-allowed}

/* gallery — masonry-ish via grid */
.refgallery{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:200px;gap:clamp(12px,1.4vw,18px)}
.refitem{position:relative;overflow:hidden;border-radius:2px;text-align:left;
  opacity:0;transform:translateY(20px);animation:refin .6s var(--e-out) forwards;animation-delay:var(--d,0s)}
@keyframes refin{to{opacity:1;transform:none}}
.refitem.tall{grid-row:span 2}
.refitem.wide{grid-column:span 2}
.refitem__img{position:absolute;inset:0}
.refitem__img img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--e)}
.refitem:hover .refitem__img img{transform:scale(1.07)}
.refitem::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 45%,rgba(0,0,0,.62))}
.refitem__cap{position:absolute;left:18px;right:18px;bottom:16px;color:#fff;z-index:2}
.refitem__type{font-family:var(--f-display);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;
  color:#fff;background:rgba(239,108,26,.9);padding:.3em .7em;border-radius:99px;display:inline-block;margin-bottom:8px}
.refitem__cap b{display:block;font-family:var(--f-display);font-size:1.08rem;line-height:1.2}
.refitem__cap small{font-size:.78rem;color:rgba(255,255,255,.82)}
.refitem__zoom{position:absolute;top:14px;right:14px;width:34px;height:34px;display:grid;place-items:center;z-index:2;
  background:rgba(255,255,255,.92);border-radius:50%;opacity:0;transform:scale(.8);transition:.3s var(--e)}
.refitem:hover .refitem__zoom{opacity:1;transform:scale(1)}

/* project lightbox */
.projbox{max-width:1040px;display:grid;grid-template-columns:1.2fr .8fr}
.projbox__img{background:var(--ink)}
.projbox__img img{width:100%;height:100%;max-height:80vh;object-fit:cover}
.projbox__meta{padding:clamp(28px,3.5vw,46px)}
.projbox__meta .tag{margin-bottom:16px}
.projbox__meta h3{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:22px}
.projbox__meta ul{display:grid;gap:0;border-top:1px solid var(--line);margin-bottom:20px}
.projbox__meta li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}
.projbox__meta span{color:var(--muted);font-size:.82rem;font-family:var(--f-display);letter-spacing:.06em}
.projbox__meta b{font-weight:500;text-align:right}
.projbox__meta p{color:var(--graphite);font-size:.92rem;margin-bottom:24px}

@media (max-width:900px){
  .reflayout{grid-template-columns:1fr}
  .reffilter{position:static;display:grid;grid-template-columns:1fr 1fr;gap:8px 24px;align-items:start}
  .reffilter__lock{grid-column:1/-1}
  .btn--block{grid-column:1/-1}
  .refgallery{grid-template-columns:repeat(2,1fr)}
  .projbox{grid-template-columns:1fr}
  .projbox__img img{max-height:42vh}
}
@media (max-width:560px){
  .refgallery{grid-template-columns:1fr;grid-auto-rows:220px}
  .refitem.wide{grid-column:span 1}
  .reffilter{grid-template-columns:1fr}
}