/* =========================================================================
   MS INTERIOR — PROJECTS page
   ========================================================================= */
.proj-hero { padding-top: calc(var(--nav-h) + clamp(3rem, 8vw, 6rem)); }
.proj-hero__title { font-family: var(--serif); font-weight: 500; line-height: 0.9; font-size: var(--step-5); letter-spacing: -0.02em; }
.proj-hero__row { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; flex-wrap: wrap; margin-top: 1.6rem; }
.proj-hero__sub { max-width: 40ch; color: var(--warm-grey); font-size: var(--step-1); }
.proj-hero__note { font-size: var(--step--1); letter-spacing: 0.12em; text-transform: uppercase; color: var(--concrete); }

/* Filter bar (sticky) */
.filter-bar { position: sticky; top: 66px; z-index: 80; background: color-mix(in srgb, var(--ivory) 90%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); padding-block: 1.1rem;
  border-block: 1px solid color-mix(in srgb, var(--charcoal) 12%, transparent); margin-top: clamp(2.5rem, 6vw, 4rem); }
.filter-bar__inner { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; justify-content: space-between; }
.filters { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.filter { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 600; padding: 0.6em 1.1em; border-radius: 100px;
  color: var(--warm-grey); transition: color 0.4s var(--ease), background 0.4s var(--ease); position: relative; }
.filter:hover { color: var(--ink); }
.filter.is-active { background: var(--ink); color: var(--ivory); }
.filter__count { font-size: 0.62rem; opacity: 0.6; margin-left: 0.4em; }
.filter-bar__result { font-size: var(--step--1); letter-spacing: 0.1em; text-transform: uppercase; color: var(--concrete); }

/* Editorial portfolio grid */
.portfolio { padding-block: clamp(3rem, 7vw, 5.5rem); }
.pf-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(2.5rem, 5vw, 4.5rem) clamp(1.4rem, 3vw, 3rem); }
.pf-item { position: relative; display: block; transition: opacity 0.6s var(--ease), transform 0.6s var(--ease), filter 0.6s var(--ease); }
.pf-item.is-hidden { opacity: 0; transform: scale(0.94) translateY(20px); pointer-events: none; position: absolute; visibility: hidden; }
/* rhythm of proportions */
.pf-item:nth-child(6n+1){ grid-column: span 7; }
.pf-item:nth-child(6n+2){ grid-column: span 5; }
.pf-item:nth-child(6n+3){ grid-column: span 5; }
.pf-item:nth-child(6n+4){ grid-column: span 7; }
.pf-item:nth-child(6n+5){ grid-column: span 6; }
.pf-item:nth-child(6n+6){ grid-column: span 6; }
.pf-item__media { overflow: hidden; background: var(--ivory-2); }
.pf-item:nth-child(6n+1) .pf-item__media,
.pf-item:nth-child(6n+4) .pf-item__media { aspect-ratio: 16/10; }
.pf-item:nth-child(6n+2) .pf-item__media,
.pf-item:nth-child(6n+3) .pf-item__media { aspect-ratio: 4/5; }
.pf-item:nth-child(6n+5) .pf-item__media,
.pf-item:nth-child(6n+6) .pf-item__media { aspect-ratio: 3/2; }
.pf-item__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.pf-item:hover .pf-item__media img { transform: scale(1.05); }
.pf-item__overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(19,18,17,0) 55%, rgba(19,18,17,0.55)); opacity: 0; transition: opacity 0.5s var(--ease); display: flex; align-items: flex-end; padding: 1.4rem; }
.pf-item:hover .pf-item__overlay { opacity: 1; }
.pf-item__view { color: #fff; font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; display: inline-flex; align-items: center; gap: 0.5em; transform: translateY(8px); transition: transform 0.5s var(--ease); }
.pf-item:hover .pf-item__view { transform: none; }
.pf-item__foot { display: flex; justify-content: space-between; align-items: baseline; margin-top: 1.1rem; gap: 1rem; }
.pf-item__num { font-size: 0.72rem; letter-spacing: 0.2em; font-weight: 700; color: var(--concrete); }
.pf-item__name { font-family: var(--serif); font-weight: 500; font-size: var(--step-2); line-height: 1.02; margin-top: 0.2rem; }
.pf-item__meta { font-size: var(--step--1); letter-spacing: 0.1em; text-transform: uppercase; color: var(--warm-grey); margin-top: 0.4rem; }

@media (max-width: 900px) {
  .pf-item, .pf-item:nth-child(n){ grid-column: span 6 !important; }
}
@media (max-width: 600px) {
  .pf-item, .pf-item:nth-child(n){ grid-column: span 12 !important; }
  .pf-item__media, .pf-item:nth-child(n) .pf-item__media { aspect-ratio: 4/3 !important; }
  .filter-bar { top: 56px; }
}