/* ─── Project Page Shared Styles ─────────────────────────────────────────── */

/* Inherits variables from style.css — load style.css first, then this */

/* ─── Back Nav ─────────────────────────────────────────────────────────────── */
#proj-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 3rem;
}

.proj-nav-back {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: opacity 0.3s ease;
}
.proj-nav-back:hover { opacity: 0.5; }
.proj-nav-back .arrow { font-size: 0.85rem; }

.proj-nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.proj-nav-index {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.proj-nav-next {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.3s ease;
}
.proj-nav-next:hover { opacity: 0.5; }

/* ─── Frame Base ───────────────────────────────────────────────────────────── */
.frame {
  min-height: 100vh;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.frame.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Short frames — don't force full-height */
.frame.frame-auto {
  min-height: auto;
  padding: 5rem 3rem;
}

.frame.frame-split {
  flex-direction: row;
  align-items: stretch;
  gap: 0;
  padding: 0;
  min-height: 100vh;
}

/* ─── Frame 01: Hero ───────────────────────────────────────────────────────── */
.frame-hero {
  min-height: 100vh;
  padding: 0 3rem;
  display: grid;
  grid-template-rows: 1fr auto;
  align-items: end;
  padding-bottom: 4rem;
  padding-top: 0;
  overflow: hidden;
  position: relative;
}

.frame-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  filter: grayscale(100%);
  transition: opacity 1s ease;
}

.frame-hero:hover .frame-hero-bg { opacity: 0.18; }

.frame-hero-content {
  position: relative;
  z-index: 2;
}

.frame-hero-eyebrow {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3rem;
  padding-top: 8rem;
}

.proj-number {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.proj-year {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.frame-hero-title {
  font-size: clamp(3.5rem, 9vw, 10rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 0.9;
  margin-bottom: 2.5rem;
  overflow: hidden;
}

.frame-hero-title .line-wrap {
  display: block;
  overflow: hidden;
}

.frame-hero-title .line {
  display: block;
  animation: slideUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  transform: translateY(100%);
}

.frame-hero-title .line:nth-child(1) { animation-delay: 0.2s; }
.frame-hero-title .line:nth-child(2) { animation-delay: 0.35s; }
.frame-hero-title .line:nth-child(3) { animation-delay: 0.5s; }

.frame-hero-meta {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.hero-meta-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-meta-value {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  right: 3rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  writing-mode: vertical-rl;
  animation: fadeIn 1s ease 1.2s both;
}

/* ─── Frame 02: Overview ───────────────────────────────────────────────────── */
.frame-overview {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 6rem;
  align-items: start;
  min-height: auto;
  padding: 8rem 3rem;
}

.overview-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 2rem;
}

.overview-statement {
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--off-white);
}

.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border);
}

.spec-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
}

.spec-item:nth-child(odd) {
  padding-right: 2rem;
  border-right: 1px solid var(--border);
}

.spec-item:nth-child(even) {
  padding-left: 2rem;
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.spec-value {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
}

/* ─── Image Frame ──────────────────────────────────────────────────────────── */
.frame-image {
  min-height: 80vh;
  padding: 0;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.frame-image.visible {
  opacity: 1;
  transform: translateY(0);
}

.frame-image-inner {
  width: 100%;
  height: 100%;
  min-height: 80vh;
  background-size: cover;
  background-position: center;
  transition: transform 10s ease;
}

.frame-image:hover .frame-image-inner {
  transform: scale(1.03);
}

.frame-image-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 3rem;
  right: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.caption-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.35);
}

/* ─── Text + image split ───────────────────────────────────────────────────── */
.frame-split-left,
.frame-split-right {
  flex: 1;
  padding: 6rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.frame-split-right {
  border-left: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  overflow: hidden;
}

/* ─── Content Blocks ───────────────────────────────────────────────────────── */
.frame-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
}

.frame-heading {
  font-size: clamp(1.8rem, 3.5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 2rem;
}

.frame-body {
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(255,255,255,0.55);
  max-width: 55ch;
}

.frame-body + .frame-body { margin-top: 1.25rem; }

/* ─── Visual placeholder ───────────────────────────────────────────────────── */
.img-placeholder {
  width: 100%;
  height: 100%;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  border: 1px solid var(--border);
  color: var(--muted);
}

.img-placeholder-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
}

/* Color-coded placeholder backgrounds per project */
.ph-01 { background: #000; }
.ph-02 { background: #000; }
.ph-03 { background: linear-gradient(135deg, #101010 0%, #1e1e1e 100%); }
.ph-04 { background: #000; }
.ph-05 { background: #000; }

/* ─── Grid layouts ─────────────────────────────────────────────────────────── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); }
.three-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1px; background: var(--border); }
.two-col > *, .three-col > * { background: var(--bg); }

.img-grid-item {
  aspect-ratio: 4/3;
  overflow: hidden;
  position: relative;
}

.img-grid-item .img-placeholder {
  border: none;
  height: 100%;
  min-height: unset;
}

/* ─── Concept quote ────────────────────────────────────────────────────────── */
.concept-quote {
  font-size: clamp(1.6rem, 3vw, 3rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--off-white);
  border-left: 1px solid rgba(255,255,255,0.15);
  padding-left: 2rem;
  max-width: 70ch;
}

/* ─── Process steps ────────────────────────────────────────────────────────── */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step-item {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding-top: 0.15rem;
}

.step-text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
}

/* ─── Tag row ──────────────────────────────────────────────────────────────── */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

/* ─── Lightbox ─────────────────────────────────────────────────────────────── */
#lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  cursor: zoom-out;
}
#lightbox.open {
  opacity: 1;
  pointer-events: all;
}
#lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  display: block;
  transform: scale(0.97);
  transition: transform 0.35s ease;
  cursor: default;
}
#lightbox.open img { transform: scale(1); }
#lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2.5rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s;
}
#lightbox-close:hover { color: #fff; }
.lb-zoomable { cursor: zoom-in !important; }

/* ─── Next project banner ──────────────────────────────────────────────────── */
.frame-next {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4rem 3rem;
  border-bottom: none;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: var(--white);
  transition: background 0.4s ease;
}

.frame-next:hover { background: rgba(255,255,255,0.03); }

.frame-next-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.frame-next-title {
  font-size: clamp(2rem, 5vw, 5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
  transition: opacity 0.3s ease;
}

.frame-next:hover .frame-next-title { opacity: 0.7; }

.frame-next-arrow {
  font-size: 3rem;
  color: var(--muted);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease;
}

.frame-next:hover .frame-next-arrow {
  transform: translate(10px, -10px);
  color: var(--white);
}

/* ─── Material list ────────────────────────────────────────────────────────── */
.material-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.material-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}

.material-name {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
}

.material-role {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ─── Diagram grid ─────────────────────────────────────────────────────────── */
.diagram-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.diagram-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.diagram-box {
  aspect-ratio: 1;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.02);
}

.diagram-box-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-align: center;
}

/* ─── Animations ───────────────────────────────────────────────────────────── */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(100%); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ─── Responsive ───────────────────────────────────────────────────────────── */

/* ── Tablet ── */
@media (max-width: 900px) {
  #proj-nav { padding: 1.5rem; }
  .proj-nav-next { display: none; }

  .frame, .frame-auto { padding: 5rem 1.5rem; }
  .frame-hero { padding: 0 1.5rem 3rem; }
  .frame-hero-eyebrow { padding-top: 6rem; }
  .frame-overview { grid-template-columns: 1fr; gap: 3rem; padding: 6rem 1.5rem; }

  .frame-split { flex-direction: column; min-height: auto; }
  .frame-split-left,
  .frame-split-right {
    padding: 4rem 1.5rem;
    border-left: none;
    border-top: 1px solid var(--border);
  }

  .three-col { grid-template-columns: 1fr 1fr; }
  .two-col   { grid-template-columns: 1fr 1fr; }

  .frame-next { flex-direction: column; align-items: flex-start; gap: 2rem; }

  .spec-grid { grid-template-columns: 1fr; }
  .spec-item:nth-child(odd) { border-right: none; padding-right: 0; }
  .spec-item:nth-child(even) { padding-left: 0; }

  body { cursor: auto; }
  .cursor, .cursor-follower { display: none; }
}

/* ── Mobile ── */
@media (max-width: 600px) {
  #proj-nav { padding: 1.25rem 1.25rem; }

  .frame, .frame-auto { padding: 4rem 1.25rem; }
  .frame-hero { padding: 0 1.25rem 2.5rem; }
  .frame-hero-eyebrow { padding-top: 5.5rem; }
  .frame-overview { padding: 5rem 1.25rem; gap: 2.5rem; }

  .frame-split-left,
  .frame-split-right { padding: 3rem 1.25rem; }

  .frame-hero-title { font-size: clamp(3rem, 12vw, 7rem); }
  .frame-hero-meta  { gap: 1.5rem; }
  .frame-heading    { font-size: clamp(1.6rem, 7vw, 3rem); }
  .overview-statement { font-size: clamp(1.2rem, 5vw, 1.8rem); }
  .concept-quote    { font-size: clamp(1.2rem, 5vw, 2rem); padding-left: 1.25rem; }

  .two-col, .three-col { grid-template-columns: 1fr; }

  .frame-image-inner { min-height: 55vw; }

  .frame-next { padding: 3rem 1.25rem; }
  .frame-next-title { font-size: clamp(1.8rem, 8vw, 3.5rem); }
}

/* ── Small phones ── */
@media (max-width: 400px) {
  .frame, .frame-auto { padding: 3rem 1rem; }
  .frame-hero { padding: 0 1rem 2rem; }
  .frame-hero-eyebrow { padding-top: 5rem; }
  .frame-overview { padding: 4rem 1rem; }
  .frame-split-left,
  .frame-split-right { padding: 2.5rem 1rem; }
  .frame-next { padding: 2.5rem 1rem; }

  .step-item { grid-template-columns: 40px 1fr; gap: 1rem; }
  .material-item { flex-direction: column; gap: 0.2rem; align-items: flex-start; }
}