/* ============================================================
   PROJECT DETAIL PAGE
   Premium Minimalist View
   ============================================================ */

.detail-page {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: var(--bg);
  padding-top: calc(var(--header-h) + var(--sp-12));
  padding-bottom: var(--sp-24);
}

/* ── Counter (01/08) ── */
.detail-counter {
  position: fixed;
  top: calc(var(--header-h) + var(--sp-4));
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--ink-3);
  z-index: 100;
}

/* ── Giant Rotated Title (left side) ── */
.detail-rotated-title {
  position: fixed;
  left: -2rem;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: center center;
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 300;
  font-style: italic;
  color: var(--ink-4);
  letter-spacing: 0.05em;
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
}

/* ── Main Screenshot ── */
.detail-image-wrap {
  position: relative;
  width: clamp(300px, 65vw, 1000px);
  margin: 0 auto;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  transform: translateY(20px);
  z-index: 2;
}

.detail-image-wrap.in-view,
.detail-image-wrap.revealed {
  transform: translateY(0);
}

.detail-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── PREV / NEXT Navigation ── */
.detail-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
}

.detail-nav-prev { left: var(--sp-8); }
.detail-nav-next { right: var(--sp-8); }

.detail-nav a {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  transition: all var(--dur-base) var(--ease-smooth);
}

.detail-nav a:hover {
  color: var(--ink);
  transform: scale(1.05);
}

/* ── Below-fold content ── */
.detail-content {
  position: relative;
  max-width: 760px;
  margin: var(--sp-20) auto 0;
  padding: 0 var(--sp-8);
  z-index: 2;
}

.detail-project-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.05;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.02em;
}

.detail-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: var(--sp-10);
}

.detail-description {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-2);
  margin-bottom: var(--sp-12);
}

/* ── Word-split animated text ── */
.word {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  margin-right: 0.25em;
}

.word-inner {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%) rotate(3deg);
  transition: opacity 0.7s var(--ease-expo),
              transform 0.7s var(--ease-expo);
}

.word.revealed .word-inner,
.split-text.in-view .word-inner {
  opacity: 1;
  transform: translateY(0) rotate(0deg);
}

/* ── Meta info row ── */
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-8) var(--sp-12);
  margin-bottom: var(--sp-12);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid var(--border);
}

.meta-item label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: var(--sp-2);
}

.meta-item span {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--ink);
}

/* ── Tech Stack Tags ── */
.detail-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-12);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  padding: 0.4em 1em;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: var(--bg-2);
  transition: all var(--dur-base) var(--ease-smooth);
}

.tech-tag:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

/* ── Features list ── */
.detail-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-4);
  margin-bottom: var(--sp-12);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--ink-2);
}

.feature-item::before {
  content: '';
  width: 6px;
  height: 6px;
  margin-top: 0.5em;
  border-radius: 50%;
  background: var(--ink-3);
  flex-shrink: 0;
}

/* ── Close Button ── */
.detail-close-btn {
  position: fixed;
  top: calc(var(--sp-8) + 1rem);
  right: var(--sp-8);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  z-index: 100;
  transition: all var(--dur-base) var(--ease-smooth);
  cursor: pointer;
}

.detail-close-btn:hover {
  background: var(--ink);
  color: var(--bg);
  transform: scale(1.05) rotate(90deg);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  padding: 0.85em 2em;
  transition: all var(--dur-base) var(--ease-smooth);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-arrow::after {
  content: '→';
  transition: transform var(--dur-base) var(--ease-smooth);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .detail-rotated-title { display: none; }
  .detail-nav { display: none; }
  .detail-image-wrap { width: 90vw; }
}

@media (max-width: 768px) {
  .detail-page { padding-top: calc(var(--header-h) + var(--sp-6)); }
  .detail-counter { top: var(--sp-4); }
  .detail-close-btn { 
    top: var(--sp-4); 
    right: var(--sp-4); 
    width: 40px; 
    height: 40px; 
  }
  .detail-content { padding: 0 var(--sp-4); margin-top: var(--sp-12); }
  .detail-meta { gap: var(--sp-6); }
}

/* ── Product Tour Gallery ── */
.gallery-tabs {
  display: flex;
  gap: var(--sp-3);
  margin: var(--sp-6) 0 var(--sp-10);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--sp-4);
  flex-wrap: wrap;
}

.gallery-tab {
  background: transparent;
  border: none;
  color: var(--ink-3);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.6em 1.2em;
  cursor: pointer;
  border-radius: var(--r-full);
  transition: all var(--dur-base) var(--ease-smooth);
}

.gallery-tab:hover {
  color: var(--ink);
  background: var(--bg-2);
}

.gallery-tab.active {
  color: var(--bg);
  background: var(--accent);
}

.gallery-panes {
  position: relative;
  width: 100%;
}

.gallery-pane {
  display: none;
  animation: fadeIn 0.4s var(--ease-smooth) forwards;
}

.gallery-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.gallery-grid {
  display: grid;
  gap: var(--sp-8);
}

.desktop-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.mobile-grid {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--sp-6);
}

.gallery-item {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  outline: none;
}

.gallery-img-container {
  position: relative;
  width: 100%;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-2);
  aspect-ratio: 16 / 10;
  transition: transform var(--dur-base) var(--ease-smooth), border-color var(--dur-base) var(--ease-smooth);
}

.mobile-grid .gallery-img-container {
  aspect-ratio: 9 / 19;
  border-radius: var(--r-lg);
  max-width: 220px;
  margin: 0 auto;
}

.gallery-item:hover .gallery-img-container,
.gallery-item:focus-within .gallery-img-container {
  transform: translateY(-4px);
  border-color: var(--ink-3);
  box-shadow: var(--shadow-lg);
}

.gallery-img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur-base) var(--ease-smooth);
}

.gallery-item:hover img {
  transform: scale(1.03);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.4);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-smooth);
}

.gallery-item:hover .gallery-item-overlay,
.gallery-item:focus-within .gallery-item-overlay {
  opacity: 1;
}

.zoom-icon {
  background: var(--bg);
  color: var(--ink);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transform: scale(0.9);
  transition: transform var(--dur-base) var(--ease-smooth);
}

.gallery-item:hover .zoom-icon {
  transform: scale(1);
}

.item-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink);
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-1);
}

.item-caption {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--ink-3);
  line-height: 1.5;
}

/* ── Lightbox Modal ── */
.gallery-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.gallery-lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  background: transparent;
  border: none;
  color: var(--ink-2);
  cursor: pointer;
  padding: 0.5rem;
  transition: color var(--dur-base) var(--ease-smooth), transform var(--dur-base) var(--ease-smooth);
  z-index: 1010;
}

.lightbox-close:hover {
  color: var(--ink);
  transform: scale(1.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-smooth);
  z-index: 1010;
}

.lightbox-nav:hover {
  background: #fff;
  color: #000;
  transform: translateY(-50%) scale(1.05);
}

.lightbox-prev { left: 2rem; }
.lightbox-next { right: 2rem; }

.lightbox-content {
  position: relative;
  max-width: 85vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.gallery-lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--r-md);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-meta {
  margin-top: var(--sp-4);
  text-align: center;
  max-width: 600px;
  color: #fff;
}

.lightbox-meta h4 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  margin-bottom: var(--sp-1);
}

.lightbox-meta p {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--ink-3);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .lightbox-nav {
    width: 40px;
    height: 40px;
  }
  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }
  .lightbox-close {
    top: 1rem;
    right: 1rem;
  }
}