/* ============================================================
   PHYGITAL NEXUS — project.css
   TJ Yang Portfolio 2026 Q3
   Project Detail Sub-page Styles
   ============================================================ */

/* ── Project Navigation ── */
.project-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: var(--color-glass);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background var(--dur-med), border-color var(--dur-med);
}

.project-nav__back {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--dur-fast), transform var(--dur-fast);
}

.project-nav__back:hover {
  color: var(--fg);
  transform: translateX(-4px);
}

/* ── Project Hero ── */
.project-hero {
  position: relative;
  width: 100%;
  height: 80vh;
  min-height: 500px;
  display: flex;
  align-items: flex-end;
  padding: var(--space-24) var(--gutter) var(--space-12);
  overflow: hidden;
  background-color: var(--bg);
  transition: background-color var(--dur-med);
}

.project-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.20;
  transform: scale(1.05);
  transition: transform var(--dur-slow) var(--ease-out-expo), opacity var(--dur-slow);
}

[data-theme="dark"] .project-hero__bg {
  opacity: 0.35;
}

.project-hero:hover .project-hero__bg {
  transform: scale(1);
}

.project-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg) 0%, var(--hero-overlay-mid) 60%, var(--hero-overlay-top) 100%);
  z-index: 1;
  transition: background var(--dur-med);
}

.project-hero__content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  width: 100%;
}

.project-hero__tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-bottom: var(--space-4);
  display: block;
}

.project-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  transition: color var(--dur-med);
}

.project-hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.5;
  color: var(--color-text-secondary);
  max-width: 650px;
  transition: color var(--dur-med);
}

/* ── Project Details Section ── */
.project-details {
  padding: var(--space-16) var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}

/* Metadata Panel Grid */
.meta-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  margin-bottom: var(--space-16);
}

@media (max-width: 768px) {
  .meta-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

.meta-item__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.meta-item__value {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--fg);
}

/* Layout structure */
.project-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
}

@media (max-width: 1024px) {
  .project-layout {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
}

.project-column__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
}

.project-text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.project-text p {
  margin-bottom: var(--space-4);
}

.project-text ul {
  margin-left: var(--space-6);
  margin-bottom: var(--space-6);
  list-style-type: square;
}

.project-text li {
  margin-bottom: var(--space-2);
}

/* Metrics Dashboard */
.project-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.project-metric-card {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-med), transform var(--dur-med);
}

.project-metric-card:hover {
  border-color: var(--color-bronze);
  transform: translateY(-2px);
}

.project-metric-card__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-bronze);
  margin-bottom: var(--space-1);
}

.project-metric-card__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Immersive Video Vitrine ── */
.video-section {
  margin-bottom: var(--space-24);
}

.video-vitrine {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border: 1px solid var(--color-border);
  background: var(--color-obsidian);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.video-vitrine video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-vitrine__overlay {
  position: absolute;
  inset: 0;
  background: rgba(17, 17, 17, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  cursor: pointer;
  transition: opacity var(--dur-med) var(--ease-silk);
}

.video-vitrine__overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.video-play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-bone);
  color: var(--color-obsidian);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  transition: transform var(--dur-fast) var(--ease-spring), background var(--dur-fast), color var(--dur-fast);
}

.video-play-btn::after {
  content: '▶';
  margin-left: 4px;
}

.video-vitrine:hover .video-play-btn {
  transform: scale(1.1);
  background: var(--color-bronze);
  color: #F9F9F6;
}

/* ── Custom Audio Showcase Section ── */
.audio-section {
  padding: var(--space-16) var(--gutter);
  background: var(--color-bronze-dim);
  border-top: 1px solid var(--color-bronze-line);
  border-bottom: 1px solid var(--color-bronze-line);
  margin-bottom: var(--space-24);
}

.audio-section__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 1024px) {
  .audio-section__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.audio-info__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.audio-info__desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Bespoke Audio Player Panel */
.custom-audio-player {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-6) var(--space-8);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.player-controls {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.play-pause-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-obsidian);
  color: var(--color-bone);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease-spring);
}

[data-theme="dark"] .play-pause-btn {
  background: var(--color-bone);
  color: var(--color-obsidian);
}

.play-pause-btn:hover {
  background: var(--color-bronze);
  color: #F9F9F6;
  transform: scale(1.05);
}

.play-pause-btn.playing::after {
  content: '❚❚';
  font-size: 14px;
}

.play-pause-btn:not(.playing)::after {
  content: '▶';
  margin-left: 2px;
}

.track-info {
  flex-grow: 1;
}

.track-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 2px;
  letter-spacing: 0.05em;
}

.track-artist {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.player-timeline-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: monospace;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.timeline-slider {
  flex-grow: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--color-border-med);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  transition: height 0.1s;
}

.timeline-slider::-webkit-slider-runnable-track {
  width: 100%;
  height: 3px;
  cursor: pointer;
}

.timeline-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-bronze);
  cursor: pointer;
  margin-top: -3.5px;
  transition: transform var(--dur-fast);
}

.timeline-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

/* Waveform bars */
.waveform-visualizer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  height: 50px;
  padding: var(--space-2) 0;
  gap: 3px;
  border-bottom: 1px solid var(--color-border);
}

.waveform-bar {
  flex-grow: 1;
  background: var(--color-border-med);
  border-radius: 1px;
  transition: background 0.15s, height var(--dur-fast) var(--ease-out-expo);
  will-change: height, background;
}

.waveform-bar.active {
  background: var(--color-bronze);
}

/* ── Image Gallery Grid ── */
.gallery-section {
  margin-bottom: var(--space-24);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

.gallery-item {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--dur-med);
}

.gallery-item:hover {
  border-color: var(--color-bronze);
}

.gallery-item__media {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-border);
}

.gallery-item__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out-expo);
}

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

.gallery-item__caption {
  padding: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  line-height: 1.5;
}

.gallery-item__title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

.gallery-item__desc {
  color: var(--color-text-secondary);
}

/* ── Spatial Design Blueprint details ── */
.blueprint-card {
  border: 1px solid var(--color-bronze-line);
  background: rgba(138, 121, 104, 0.05);
  border-radius: var(--radius-sm);
  padding: var(--space-6) var(--space-8);
  margin-bottom: var(--space-16);
  position: relative;
  overflow: hidden;
}

.blueprint-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(138, 121, 104, 0.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(138, 121, 104, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.blueprint-card__header {
  font-family: Courier New, monospace;
  font-size: var(--text-xs);
  color: var(--color-bronze);
  text-transform: uppercase;
  letter-spacing: 0.25em;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.blueprint-card__title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

/* ── Footnote Navigation ── */
.project-footer-nav {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
  margin-top: var(--space-24);
}

.project-footer-nav__btn {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--dur-fast);
}

.project-footer-nav__btn:hover {
  color: var(--fg);
}