/* ==========================================================================
   The Graphite Room — a night-lit gallery-wall exhibition
   Token system
   ========================================================================== */

:root {
  --wall:        #1c1a17;
  --wall-soft:   #262320;
  --wall-deep:   #131211;
  --frame:       #0c0b0a;
  --mat:         #f1ebdc;
  --mat-shadow:  #dcd0b6;
  --brass:       #b9905a;
  --brass-bright:#e0bd85;
  --ink-light:   #f2ede0;
  --ink-muted:   #a89f8f;
  --ink-faint:   #736b5d;
  --wire:        #5f594c;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-label:   'Archivo', 'Work Sans', sans-serif;

  --gap: 46px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--wall);
  color: var(--ink-light);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, video { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; background: none; border: none; color: inherit; }

/* subtle plaster/wall grain across the whole page */
.wall-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(19, 18, 17, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(185, 144, 90, 0.22);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark { text-decoration: none; display: flex; flex-direction: column; line-height: 1; }

.wordmark-main {
  font-family: var(--font-label);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--ink-light);
}

.wordmark-sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 12.5px;
  color: var(--brass-bright);
  margin-top: 6px;
}

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.menu-toggle span { width: 22px; height: 1.5px; background: var(--ink-light); display: block; }

/* ==========================================================================
   Hero — the entry wall
   ========================================================================== */

.hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 56px;
  position: relative;
}

.track-lighting {
  width: 100%;
  height: 60px;
  display: block;
  margin-bottom: 30px;
}

.hero-inner { max-width: 660px; padding-top: 8px; }

.eyebrow {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass-bright);
  margin: 0 0 20px;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(38px, 5.6vw, 60px);
  line-height: 1.1;
  margin: 0 0 24px;
  color: var(--ink-light);
}

.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--brass-bright);
}

.hero-copy {
  font-size: 16.5px;
  color: var(--ink-muted);
  max-width: 54ch;
  margin: 0;
}

/* ==========================================================================
   Filter nav — the room directory
   ========================================================================== */

.filter-nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 22px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid rgba(185, 144, 90, 0.22);
}

.filter-list { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; flex-wrap: wrap; overflow-x: auto; }

.filter-btn {
  font-family: var(--font-label);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 9px 16px;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.filter-btn:hover { color: var(--ink-light); }

.filter-btn.is-active {
  color: var(--wall-deep);
  background: var(--brass-bright);
  border-color: var(--brass-bright);
}

.filter-count {
  font-family: var(--font-label);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
  margin: 0 0 12px;
}

/* ==========================================================================
   Gallery grid — framed pieces on the wall
   ========================================================================== */

.gallery {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 32px 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap) 40px;
}

@media (max-width: 980px) { .gallery { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .gallery { grid-template-columns: 1fr; padding-left: 20px; padding-right: 20px; gap: 56px; } }

.piece {
  position: relative;
  cursor: pointer;
  padding-top: 34px; /* room for hanging wire */
}

.piece-wire {
  position: absolute;
  top: 0;
  left: 50%;
  width: 70px;
  height: 30px;
  transform: translateX(-50%);
  pointer-events: none;
}
.piece-wire svg { width: 100%; height: 100%; }
.piece-wire .nail { fill: var(--ink-faint); }
.piece-wire .wire { stroke: var(--wire); stroke-width: 1; fill: none; }

.piece-spot {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  height: 200px;
  background: radial-gradient(ellipse at top, rgba(241, 226, 184, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.piece:hover .piece-spot { opacity: 1; }

.piece-frame {
  background: var(--frame);
  padding: 10px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.03) inset, 0 22px 40px -18px rgba(0,0,0,0.7);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.piece:hover .piece-frame {
  transform: translateY(-3px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 30px 50px -16px rgba(0,0,0,0.8);
}

.piece-mat {
  background: var(--mat);
  padding: 16px;
  border: 1px solid var(--mat-shadow);
}

.piece-media {
  position: relative;
  overflow: hidden;
  background: var(--mat-shadow);
}

.piece-media img, .piece-media video {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.7s ease, filter 0.4s ease;
  filter: sepia(0.06) contrast(1.02);
}
.piece:hover .piece-media img,
.piece:hover .piece-media video { transform: scale(1.03); }

.piece-play {
  position: absolute;
  top: 50%; left: 50%;
  width: 48px; height: 48px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(28, 26, 23, 0.72);
  border: 1px solid var(--brass-bright);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.3s ease;
}
.piece-play svg { width: 14px; height: 14px; fill: var(--brass-bright); margin-left: 2px; }
.piece:hover .piece-play { transform: translate(-50%, -50%) scale(1.1); }

.piece-tag {
  position: absolute;
  top: 10px; left: 10px;
  font-family: var(--font-label);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wall-deep);
  background: var(--brass-bright);
  padding: 3px 8px;
}

.piece-plaque {
  margin: 14px auto 0;
  text-align: center;
  max-width: 90%;
}

.plaque-title {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 17px;
  color: var(--ink-light);
  margin-bottom: 4px;
}

.plaque-meta {
  display: block;
  font-family: var(--font-label);
  font-size: 9.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--brass);
}

.empty-state {
  text-align: center;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 20px;
  color: var(--ink-faint);
  padding: 60px 20px 110px;
}

/* ==========================================================================
   Footer — the exit
   ========================================================================== */

.site-footer {
  border-top: 1px solid rgba(185, 144, 90, 0.22);
  padding: 36px 32px 60px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  line-height: 1.9;
}
.footer-inner code {
  background: var(--wall-soft);
  padding: 1px 5px;
  border-radius: 2px;
  color: var(--brass-bright);
  font-family: 'Work Sans', sans-serif;
}

/* ==========================================================================
   Lightbox — a single spotlit room
   ========================================================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox[hidden] { display: none; }

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, #2a2621 0%, #100f0d 78%);
  animation: fade-in 0.3s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

.lightbox-room {
  position: relative;
  width: 100%;
  max-width: 1100px;
  max-height: 92vh;
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  animation: room-in 0.35s ease;
}
@keyframes room-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.lightbox-spot {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 620px;
  height: 460px;
  background: radial-gradient(ellipse at top, rgba(241, 226, 184, 0.22), transparent 72%);
  pointer-events: none;
}

.lightbox-frame {
  position: relative;
  background: var(--frame);
  padding: 14px;
  max-width: 640px;
  width: 100%;
  box-shadow: 0 40px 90px -20px rgba(0,0,0,0.75);
  margin-top: 34px;
}

.frame-wire {
  position: absolute;
  top: -34px;
  left: 50%;
  width: 90px;
  height: 34px;
  transform: translateX(-50%);
  background-image:
    radial-gradient(circle at 50% 4px, var(--ink-faint) 3px, transparent 3.5px),
    linear-gradient(115deg, transparent 48%, var(--wire) 48.5%, var(--wire) 50%, transparent 50.5%),
    linear-gradient(65deg, transparent 48%, var(--wire) 48.5%, var(--wire) 50%, transparent 50.5%);
}

.lightbox-media {
  background: var(--mat);
  padding: 18px;
  border: 1px solid var(--mat-shadow);
}
.lightbox-media img,
.lightbox-media video {
  width: 100%;
  max-height: 58vh;
  object-fit: contain;
  background: var(--mat-shadow);
}

.lightbox-plaque {
  margin-top: 26px;
  text-align: center;
  max-width: 520px;
}

.cap-eyebrow {
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass-bright);
  margin: 0 0 12px;
}

.lightbox-plaque h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 28px;
  margin: 0 0 12px;
  color: var(--ink-light);
}

.cap-meta {
  font-family: var(--font-label);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(185, 144, 90, 0.25);
}

.cap-description {
  font-size: 14.5px;
  color: var(--ink-muted);
  line-height: 1.75;
  margin: 0;
}

.cap-position {
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-top: 22px;
}

.lightbox-close {
  position: fixed;
  top: 22px;
  right: 26px;
  font-size: 30px;
  line-height: 1;
  color: var(--ink-light);
  z-index: 5;
  font-family: var(--font-display);
  transition: color 0.2s ease, transform 0.2s ease;
}
.lightbox-close:hover { color: var(--brass-bright); transform: rotate(90deg); }

.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 40px;
  color: var(--ink-light);
  background: rgba(12, 11, 10, 0.5);
  border: 1px solid rgba(185, 144, 90, 0.3);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.lightbox-nav:hover { background: rgba(185, 144, 90, 0.18); border-color: var(--brass-bright); }
.lightbox-prev { left: 26px; }
.lightbox-next { right: 26px; }

@media (max-width: 780px) {
  .lightbox-room { padding: 70px 20px 40px; }
  .lightbox-frame { margin-top: 20px; }
  .lightbox-nav { width: 40px; height: 40px; font-size: 32px; }
  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
}

/* ==========================================================================
   Responsive header / nav
   ========================================================================== */

@media (max-width: 620px) {
  .menu-toggle { display: flex; }
  .filter-nav { flex-direction: column; align-items: flex-start; }
  .filter-count { margin-bottom: 8px; }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .piece, .piece-frame, .piece-media img, .piece-media video,
  .lightbox-backdrop, .lightbox-room { animation: none; transition: none; }
}

/* Focus visibility */
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--brass-bright);
  outline-offset: 3px;
}