/* ============================================================
   PROJECT DETAIL PAGE — project.css
   ============================================================ */

/* Keep project page content left-aligned (overrides mobile body centering) */
.project-page { text-align: left; }

/* ── NAV override: always dark on project pages ── */
.nav { background: rgba(0,0,0,0.92); border-bottom: 1px solid var(--border); justify-content: space-between; }

/* ── BACK BUTTON sits on the left, nav__links on the right ── */
.nav .back-btn { margin-right: auto; }

/* ── BACK BUTTON ── */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-2);
  margin: 0;
  white-space: nowrap;
  transition: color 0.2s, gap 0.2s;
}
.back-btn:hover { color: var(--red); gap: 14px; }
.back-btn svg { transition: transform 0.2s var(--ease-out); }
.back-btn:hover svg { transform: translateX(-4px); }

/* ── PROJECT HERO ── */
.proj-hero {
  background: var(--bg);
  padding-top: calc(var(--nav-h) + clamp(48px, 6vw, 80px));
  padding-bottom: clamp(48px, 6vw, 80px);
  position: relative;
}

.proj-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
  opacity: 0.3;
}

.proj-hero__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.proj-hero__index {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--red);
}

.proj-hero__divider {
  font-family: var(--font-mono);
  color: var(--text-3);
  font-size: 14px;
}

.proj-hero__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
}

.proj-hero__title {
  font-family: var(--font-display);
  font-size: clamp(56px, 10vw, 130px);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 0.92;
  color: var(--text);
  margin-bottom: 20px;
}

.proj-hero__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  background: var(--red);
  background-image: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  border: 1px solid var(--red);
  padding: 12px 24px;
  box-shadow: 0 0 18px var(--red-dim);
  transition: box-shadow 0.25s, transform 0.2s;
}
.proj-hero__link:hover {
  box-shadow: 0 0 32px var(--red-glow);
  transform: translateY(-2px);
}

.proj-hero__subtitle {
  font-family: var(--font-serif);
  font-size: clamp(14px, 1.8vw, 20px);
  color: var(--text-2);
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ── DETAILS STRIP ── */
.proj-details {
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  padding: 0;
}

.proj-details__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--border);
}

.proj-detail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 28px 32px;
  border-right: 1px solid var(--border);
  transition: background 0.2s;
}

.proj-detail:hover { background: var(--bg-4); }

.proj-detail__label {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
}

.proj-detail__value {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
}

/* ── SECTION SHARED ── */
.proj-section {
  padding: clamp(56px, 7vw, 96px) 0;
  border-bottom: 1px solid var(--border);
}

.proj-section__header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 40px;
}

.proj-section__label {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
  line-height: 1;
}

/* ── DESCRIPTION ── */
.proj-desc-section { background: var(--bg-2); }

.proj-desc {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.proj-desc p {
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.82;
  color: var(--text-2);
}

/* ── SKILLS ── */
.proj-skills-section { background: var(--bg); }

.proj-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.proj-skill {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 10px 18px;
  border: 1px solid var(--red);
  color: #fff;
  background: var(--red);
  background-image: linear-gradient(135deg, rgba(255,255,255,0.18) 0%, transparent 50%, rgba(0,0,0,0.12) 100%);
  box-shadow: 0 0 14px var(--red-dim), inset 0 1px 0 rgba(255,255,255,0.25);
  transition: all 0.22s;
  cursor: default;
}

.proj-skill:hover {
  background-image: linear-gradient(135deg, rgba(255,255,255,0.28) 0%, transparent 50%, rgba(0,0,0,0.12) 100%);
  box-shadow: 0 0 24px var(--red-glow), inset 0 1px 0 rgba(255,255,255,0.35);
  transform: translateY(-1px);
}

/* ── GALLERY ── */
.proj-gallery-section { background: var(--bg-2); }

.proj-gallery__hint {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-left: auto;
  align-self: flex-end;
  padding-bottom: 4px;
}

.proj-gallery {
  columns: 3;
  column-gap: 3px;
}

.gallery-item {
  position: relative;
  break-inside: avoid;
  margin-bottom: 3px;
  overflow: hidden;
  cursor: pointer;
  background: #1a1a1a;
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s var(--ease-out), filter 0.3s;
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: brightness(0.85);
}

/* Placeholder gradient tile */
.gallery-item--placeholder {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-item--placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    transparent, transparent 3px,
    rgba(0,0,0,0.12) 3px, rgba(0,0,0,0.12) 4px
  );
  pointer-events: none;
}

.gallery-item--placeholder:nth-child(2) { filter: brightness(0.75); }
.gallery-item--placeholder:nth-child(3) { filter: brightness(0.9) contrast(1.1); }
.gallery-item--placeholder:nth-child(4) { filter: brightness(0.65); }
.gallery-item--placeholder:nth-child(5) { filter: brightness(1.05) saturate(1.2); }
.gallery-item--placeholder:nth-child(6) { filter: brightness(0.8); }

.gallery-item__num {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 72px);
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.06);
  position: relative;
  z-index: 1;
  user-select: none;
  pointer-events: none;
}

/* Hover overlay on placeholder */
.gallery-item--placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 0, 46, 0.04);
  opacity: 0;
  z-index: 2;
  transition: opacity 0.3s;
}
.gallery-item--placeholder:hover::before { opacity: 1; }

/* Replace-image prompt shown on placeholder hover */
.gallery-item--placeholder .gallery-item__prompt {
  position: absolute;
  bottom: 14px;
  left: 14px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
  z-index: 3;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.gallery-item--placeholder:hover .gallery-item__prompt { opacity: 1; }

/* ── LIGHTBOX ── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: all;
}

.lightbox__close {
  position: absolute;
  top: 24px; right: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  z-index: 1;
}
.lightbox__close:hover {
  border-color: var(--red);
  color: var(--red);
  box-shadow: 0 0 12px var(--red-dim);
}

.lightbox__arrow {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  z-index: 1;
}
.lightbox__arrow:hover {
  border-color: var(--red);
  color: var(--red);
  box-shadow: 0 0 16px var(--red-dim);
}
.lightbox__arrow--prev { left: clamp(12px, 3vw, 40px); }
.lightbox__arrow--next { right: clamp(12px, 3vw, 40px); }

.lightbox__arrow:disabled {
  opacity: 0.2;
  pointer-events: none;
}

.lightbox__stage {
  max-width: min(90vw, 1100px);
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__stage img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 0 60px rgba(0,0,0,0.8);
}

/* Placeholder in lightbox */
.lightbox__placeholder {
  width: min(80vw, 900px);
  height: min(60vh, 600px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}

.lightbox__placeholder span {
  font-family: var(--font-display);
  font-size: clamp(60px, 12vw, 120px);
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.05);
  user-select: none;
}

.lightbox__counter {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-3);
}

/* Slide transition */
.lightbox__stage { transition: opacity 0.22s var(--ease-out); }
.lightbox__stage.is-transitioning { opacity: 0; }

/* ── PROJECT NAV ── */
.proj-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
}

.proj-nav__btn {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(28px, 4vw, 48px) clamp(24px, 5vw, 56px);
  border-right: 1px solid var(--border);
  transition: background 0.25s;
}

.proj-nav__btn--next {
  border-right: none;
  align-items: flex-end;
  text-align: right;
}

.proj-nav__btn:hover { background: var(--bg-3); }

.proj-nav__dir {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  transition: color 0.2s;
}

.proj-nav__btn:hover .proj-nav__dir { color: var(--red); }

.proj-nav__name {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 36px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
  line-height: 1;
  transition: color 0.2s;
}

.proj-nav__btn:hover .proj-nav__name { color: var(--text); }

/* ── 404 / NOT FOUND ── */
.proj-not-found {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  gap: 24px;
}

.proj-not-found h1 {
  font-family: var(--font-display);
  font-size: clamp(60px, 12vw, 140px);
  color: var(--text-3);
}

.proj-not-found p {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .proj-details__grid {
    grid-template-columns: 1fr;
  }
  .proj-detail {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
  }
  .proj-gallery { columns: 2; }
  .proj-nav { grid-template-columns: 1fr; }
  .proj-nav__btn--next { border-right: none; border-top: 1px solid var(--border); align-items: flex-start; text-align: left; }
}

@media (max-width: 480px) {
  .proj-gallery { columns: 1; }
  .lightbox__arrow--prev { left: 8px; }
  .lightbox__arrow--next { right: 8px; }
}