/* ---------- reset ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #1a1a1a;
  background: #f7f6f3;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ---------- sidebar nav ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  height: 100vh;
  padding: 2.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
  border-right: 1px solid #e2e0da;
  background: #f7f6f3;
  z-index: 100;
}
.nav-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.nav-toggle { display: none; }
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  font-size: 0.85rem;
}
.nav-links a {
  display: flex;
  gap: 0.6rem;
  color: #8a8579;
  letter-spacing: 0.02em;
  transition: color 0.15s ease;
}
.nav-index {
  font-variant-numeric: tabular-nums;
  color: #c3bfb4;
}
.nav-links a:hover,
.nav-links a.active {
  color: #1a1a1a;
}
.nav-links a.active .nav-index { color: #1a1a1a; }

/* ---------- page shell ---------- */
main {
  margin-left: 220px;
}

/* ---------- landing page ---------- */
.landing {
  padding: 2.5rem 4rem 1.5rem;
  max-width: 720px;
}
.landing h1 {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
  line-height: 1.4;
  white-space: nowrap;
}
.landing p {
  color: #6b6659;
  font-size: 0.9rem;
}
/* ---------- landing project grid ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-flow: dense;
  gap: 2px;
  background: #e2e0da;
}
.grid-tile {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: visible;
  display: block;
}
.tile-image-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  display: block;
}
.tile-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.grid-tile:hover .tile-image-wrap img {
  transform: scale(1.04);
}
.grid-label {
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.85rem 1rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.55));
  color: #fff;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 1;
}
.grid-tile:hover .grid-label {
  opacity: 1;
}

/* color swatch that slides out of a tile on hover, revealing title + date */
.grid-swatch-slide {
  position: absolute;
  top: 0;
  left: 100%;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  text-align: center;
  padding: 1rem;
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.2s ease;
  z-index: 5;
}
.grid-tile:hover .grid-swatch-slide {
  transform: scaleX(1);
  opacity: 1;
  pointer-events: auto;
}
/* rightmost column: sliding right would run off the row, so slide down instead */
.grid-tile:nth-child(3n) .grid-swatch-slide {
  top: 100%;
  left: 0;
  transform: scaleY(0);
  transform-origin: top center;
}
.grid-tile:nth-child(3n):hover .grid-swatch-slide {
  transform: scaleY(1);
}
.swatch-preview {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
}
.swatch-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.32;
  mix-blend-mode: luminosity;
}
.swatch-title {
  position: relative;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.3;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
}
.swatch-date {
  position: relative;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.8;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
}

/* ---------- project pages ---------- */
.project { display: block; will-change: opacity; }
.project-hero { position: relative; width: 100%; }
.project-hero img { width: 100%; height: auto; }

/* large centered title that briefly flashes over the hero when a project comes into view */
.hero-title-card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  text-align: center;
  padding: 2rem;
  color: #fff;
  opacity: 0;
  pointer-events: none;
  z-index: 3;
}
.hero-title-card .hero-title-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.85;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.6);
}
.hero-title-card .hero-title-main {
  font-size: 2.4rem;
  font-weight: 500;
  line-height: 1.2;
  max-width: 20ch;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.65);
}
.hero-title-card.flash {
  animation: heroTitleFlash 2.4s ease forwards;
}
@keyframes heroTitleFlash {
  0% { opacity: 0; }
  12% { opacity: 1; }
  65% { opacity: 1; }
  100% { opacity: 0; }
}

/* letterboxed hero: for very wide/short source images that read as tightly
   cropped when stretched edge-to-edge — inset with vertical breathing room instead */
.project-hero.hero-letterboxed {
  display: flex;
  justify-content: center;
  background: #e2e0da;
  padding: 3rem 0;
}
.project-hero.hero-letterboxed img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 70vh;
}

.project-intro {
  max-width: 640px;
  padding: 3.5rem 4rem 2rem;
}
.project-intro .eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a39d8f;
  margin-bottom: 0.75rem;
}
.project-intro h1 {
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
}
.project-intro p {
  color: #4a463c;
  font-size: 0.98rem;
}
.project-intro .placeholder-note {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: #b5522f;
  border: 1px dashed #e0b6a5;
  background: #fdf3ee;
  padding: 0.75rem 1rem;
}

.project-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: #e2e0da;
}
.project-gallery figure { flex: 1 1 480px; background: #f7f6f3; }
.project-gallery figure.wide { flex-basis: 100%; }
.project-gallery figure.pair-large { flex: 1 1 calc(50% - 1px); }
.project-gallery img { width: 100%; height: 100%; object-fit: cover; }

.placeholder-figure {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  min-height: 240px;
  border: 1px dashed #e0b6a5;
  background: #fdf3ee;
  color: #b5522f;
  font-size: 0.85rem;
}

.project-gallery.centered-solo { justify-content: center; }
.project-gallery.centered-solo figure { flex: 0 1 900px; }

.gallery-heading {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a39d8f;
  padding: 2rem 4rem 0.75rem;
  background: #f7f6f3;
}

.project-gallery.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.project-gallery.grid-3 figure {
  aspect-ratio: 1 / 1;
}
.project-gallery.grid-3.natural figure {
  aspect-ratio: auto;
}
.project-gallery.grid-3.natural img {
  height: auto;
  object-fit: initial;
}

/* ---------- explicit layout for the grid-studies drawing set ---------- */
.gallery-drawings {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
}
.gallery-drawings figure { aspect-ratio: auto; background: #f7f6f3; }
.gallery-drawings img { width: 100%; height: auto; display: block; }
/* elev1 (aspect 5186:3800) and elev2 (aspect 2600:3863) sit in their own grid, columns sized to the exact
   inverse of each image's aspect ratio so both render at precisely the same height (ground lines align). */
.elev-pair {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: 0.67305fr 1.36474fr;
}
.gallery-drawings .area-plan { grid-column: 1 / 13; }
.gallery-drawings .area-sec1 { grid-column: 1 / 13; }
.gallery-drawings .area-tet { grid-column: 1 / 4; }
.gallery-drawings .area-fig1 { grid-column: 4 / 7; }
.gallery-drawings .area-fig2 { grid-column: 7 / 10; }
.gallery-drawings .area-fig3 { grid-column: 10 / 13; }
.gallery-drawings .area-bent1 { grid-column: 1 / 13; }

/* ---------- feature photo grid: first image spreads full-width, rest tile evenly ---------- */
.gallery-feature {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: #e2e0da;
}
.gallery-feature figure { aspect-ratio: 1 / 1; background: #f7f6f3; }
.gallery-feature img { width: 100%; height: 100%; object-fit: cover; }
.gallery-feature figure.spread { grid-column: 1 / -1; aspect-ratio: auto; }
.gallery-feature figure.spread img { height: auto; object-fit: initial; }

/* ---------- next-project teaser ---------- */
.next-project {
  position: relative;
  display: block;
  margin-top: 4px;
}
.next-project img { width: 100%; height: 70vh; object-fit: cover; filter: brightness(0.9); transition: filter 0.25s ease; }
.next-project:hover img { filter: brightness(1); }
.next-project .next-label {
  position: absolute;
  bottom: 2.5rem;
  left: 4rem;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0,0,0,0.35);
}
.next-project .next-label .eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 0.5rem;
}
.next-project .next-label h2 {
  font-size: 1.8rem;
  font-weight: 500;
}

/* ---------- mobile ---------- */
@media (max-width: 760px) {
  .project-gallery figure.pair-large { flex-basis: 100%; }
  .hero-title-card .hero-title-main { font-size: 1.5rem; }
  .nav {
    position: sticky;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-right: none;
    border-bottom: 1px solid #e2e0da;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: none;
    border: 1px solid #d8d5cc;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
  }
  .nav-links {
    position: fixed;
    top: 57px;
    left: 0;
    right: 0;
    background: #f7f6f3;
    border-bottom: 1px solid #e2e0da;
    padding: 1.25rem;
    display: none;
    gap: 1rem;
  }
  .nav-links.open { display: flex; }
  main { margin-left: 0; }
  .landing, .project-intro { padding: 2.5rem 1.5rem; }
  .landing h1 { white-space: normal; }
  .next-project .next-label { left: 1.5rem; bottom: 1.5rem; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  /* 2-column layout: the right column is now the "edge" instead of the 3rd column */
  .grid-tile:nth-child(3n) .grid-swatch-slide {
    top: 0;
    left: 100%;
    transform: scaleX(0);
    transform-origin: left center;
  }
  .grid-tile:nth-child(3n):hover .grid-swatch-slide {
    transform: scaleX(1);
  }
  .grid-tile:nth-child(even) .grid-swatch-slide {
    top: 100%;
    left: 0;
    transform: scaleY(0);
    transform-origin: top center;
  }
  .grid-tile:nth-child(even):hover .grid-swatch-slide {
    transform: scaleY(1);
  }
  .project-gallery.grid-3 { grid-template-columns: repeat(2, 1fr); }
  .gallery-heading { padding: 1.5rem 1.5rem 0.5rem; }
  .gallery-feature { grid-template-columns: repeat(2, 1fr); }

  .gallery-drawings {
    grid-template-columns: 1fr;
  }
  .gallery-drawings figure { grid-column: 1 / -1; }
  .elev-pair { grid-column: 1 / -1; grid-template-columns: 1fr; }
}