/* ==========================================================================
   ASHEN PRESS 3D SHELF — STYLESHEET
   3D Interactive Library Shelf for 7 Portfolio Projects
   Aesthetic: Dark Obsidian + Warm Studio Key Lights + Editorial Gold Accents
   ========================================================================== */

:root {
  --shelf-bg: #0b0b0e;
  --shelf-ink: #f4ede1;
  --shelf-ink-soft: rgba(244, 237, 225, 0.65);
  --shelf-gold: #e5a93c;
  --shelf-glass: rgba(14, 14, 18, 0.85);
  --shelf-glass-border: rgba(255, 255, 255, 0.1);
  --ease-cinematic: cubic-bezier(0.22, 1, 0.36, 1);
}

body.shelf-view-body {
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background-color: var(--shelf-bg);
  color: var(--shelf-ink);
  font-family: 'Plus Jakarta Sans', var(--font-sans);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* Three.js Canvas */
canvas#shelfCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  touch-action: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.8s ease;
}

canvas#shelfCanvas.is-ready {
  opacity: 1;
}

/* Ambient Studio Light Vignette */
.shelf-vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(
    circle at 50% 48%,
    rgba(11, 11, 14, 0) 30%,
    rgba(11, 11, 14, 0.25) 75%,
    rgba(11, 11, 14, 0.65) 100%
  );
}

/* Header & Dock Overlay */
.shelf-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 14px 24px;
}

.shelf-header-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}

/* Telemetry Badge Strip (Under Header) */
.shelf-telemetry-bar {
  position: fixed;
  top: 72px;
  left: 24px;
  right: 24px;
  z-index: 25;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.shelf-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  background: rgba(14, 14, 18, 0.72);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--shelf-ink-soft);
  text-transform: uppercase;
  pointer-events: auto;
}

.shelf-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--shelf-gold);
  box-shadow: 0 0 8px var(--shelf-gold);
}

.shelf-mode-actions {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.shelf-mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--shelf-ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
}

.shelf-mode-btn:hover {
  background: rgba(229, 169, 60, 0.15);
  border-color: rgba(229, 169, 60, 0.4);
  color: var(--shelf-gold);
}

/* Detail Inspection Panel (Floats on Left when book is selected) */
.shelf-detail-panel {
  position: fixed;
  left: 32px;
  top: 50%;
  transform: translateY(-50%) translateX(-24px);
  z-index: 40;
  width: 440px;
  max-width: calc(100vw - 32px);
  max-height: 82vh;
  overflow-y: auto;
  scrollbar-width: thin;
  padding: 20px;
  border-radius: 20px;
  background: var(--shelf-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--shelf-glass-border);
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.8), 0 0 32px rgba(229, 169, 60, 0.06);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-cinematic), transform 0.4s var(--ease-cinematic);
}

.shelf-detail-panel.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(-50%) translateX(0);
}

.shelf-detail-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--shelf-gold);
  margin-bottom: 8px;
  font-weight: 600;
}

.shelf-detail-title {
  font-family: var(--font-display, 'Syne', serif);
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.15;
  color: #ffffff;
  margin: 0 0 6px 0;
  letter-spacing: -0.02em;
}

.shelf-detail-tagline {
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--shelf-ink-soft);
  font-family: var(--font-mono);
  margin-bottom: 16px;
  display: block;
}

.shelf-detail-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(244, 237, 225, 0.82);
  margin: 0 0 18px 0;
}

.shelf-detail-highlight {
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(229, 169, 60, 0.08);
  border-left: 3px solid var(--shelf-gold);
  font-size: 0.8rem;
  line-height: 1.5;
  color: rgba(244, 237, 225, 0.9);
  margin-bottom: 18px;
}

.shelf-detail-highlight strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--shelf-gold);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.shelf-tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 22px;
}

.shelf-tech-pill {
  padding: 3px 9px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--shelf-ink-soft);
}

.shelf-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.shelf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 10px 18px;
  border-radius: 9999px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-cinematic);
  border: none;
  white-space: nowrap;
}

.shelf-btn-primary {
  background: var(--shelf-gold);
  color: #0b0b0e;
  box-shadow: 0 4px 16px rgba(229, 169, 60, 0.3);
}

.shelf-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229, 169, 60, 0.45);
  background: #f0b74b;
}

.shelf-btn-outline {
  background: rgba(255, 255, 255, 0.06);
  color: var(--shelf-ink);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.shelf-btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1.5px);
}

/* Center Bottom Drag Hint */
.shelf-drag-hint {
  position: fixed;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  background: rgba(14, 14, 18, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--shelf-ink-soft);
  border-radius: 9999px;
  padding: 6px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.shelf-drag-hint.is-hidden {
  opacity: 0;
}

/* Bottom Catalogue Rail */
.shelf-footer-rail {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  padding: 12px 24px 16px;
  background: linear-gradient(to top, rgba(11, 11, 14, 0.95) 60%, rgba(11, 11, 14, 0) 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.shelf-rail-scroll {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  justify-content: safe center;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  padding: 4px 24px;
  margin: 0 auto;
}

.shelf-rail-scroll::-webkit-scrollbar {
  display: none;
}

.shelf-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  padding: 7px 14px;
  text-align: left;
  cursor: pointer;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--shelf-ink);
  transition: all 0.2s var(--ease-cinematic);
}

.shelf-chip:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(229, 169, 60, 0.35);
  transform: translateY(-2px);
}

.shelf-chip.is-active {
  background: rgba(229, 169, 60, 0.15);
  border-color: var(--shelf-gold);
  box-shadow: 0 0 16px rgba(229, 169, 60, 0.2);
  transform: translateY(-2px);
}

.shelf-chip-vol {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(229, 169, 60, 0.2);
  color: var(--shelf-gold);
  border: 1px solid rgba(229, 169, 60, 0.4);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
}

.shelf-chip.is-active .shelf-chip-vol {
  background: var(--shelf-gold);
  color: #0b0b0e;
  border-color: var(--shelf-gold);
}

.shelf-chip-text h4 {
  margin: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #ffffff;
  white-space: nowrap;
}

.shelf-chip-text p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--shelf-ink-soft);
  white-space: nowrap;
}

/* Loader Screen */
.shelf-loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--shelf-bg);
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.shelf-loader.is-done {
  opacity: 0;
}

.shelf-loader-brand {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--shelf-gold);
  text-transform: uppercase;
}

.shelf-loader-bar {
  width: 140px;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.shelf-loader-fill {
  position: absolute;
  inset: 0;
  transform-origin: left;
  transform: scaleX(0);
  background: var(--shelf-gold);
  transition: transform 0.3s ease;
}

/* Mobile & Tablet Adjustments */
@media (max-width: 900px) {
  .shelf-detail-panel {
    left: 16px;
    right: 16px;
    width: auto;
    max-height: 50vh;
    top: auto;
    bottom: 96px;
    transform: translateY(20px);
  }

  .shelf-detail-panel.is-active {
    transform: translateY(0);
  }

  .shelf-rail-scroll {
    justify-content: flex-start;
  }
}

/* ==========================================================================
   EMBEDDED PROJECTS SHELF STAGE & VIEW SWITCHER (INTEGRATED INTO #projects)
   ========================================================================== */

/* Segmented View Switcher in #projects header */
.projects-header-actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-shrink: 0;
  margin-left: auto;
  flex-wrap: nowrap;
}

.projects-view-toggle {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  background: rgba(18, 18, 24, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 9999px;
  padding: 4px;
  gap: 4px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.projects-deck-indicator {
  flex-shrink: 0;
  white-space: nowrap;
}

.view-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 9999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary, #94a3b8);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.view-toggle-btn svg,
.view-toggle-btn i {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.view-toggle-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.view-toggle-btn.active {
  background: linear-gradient(135deg, rgba(229, 169, 60, 0.24), rgba(229, 169, 60, 0.1));
  color: #f7ca6d;
  border-color: rgba(229, 169, 60, 0.55);
  box-shadow: 0 2px 14px rgba(229, 169, 60, 0.22);
}

.view-toggle-btn.active svg,
.view-toggle-btn.active i {
  color: var(--shelf-gold, #e5a93c);
  transform: scale(1.1);
}

/* Visibility states for view stages */
.projects-view-stage {
  display: none;
  width: 100%;
}

.projects-view-stage.active {
  display: block;
  animation: stageFadeIn 0.35s ease forwards;
}

@keyframes stageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Embedded Shelf Stage Container - Seamless & Borderless */
.projects-shelf-stage {
  position: relative;
  width: 100%;
  height: clamp(620px, 78vh, 820px);
  min-height: 560px;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  border: none;
  box-shadow: none;
  margin-top: 8px;
  user-select: none;
}

/* Scoped Overrides inside .projects-shelf-stage */
.projects-shelf-stage canvas#shelfCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.projects-shelf-stage .shelf-vignette {
  position: absolute;
  inset: 0;
}

.projects-shelf-stage .shelf-detail-panel {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) translateX(-24px);
  max-height: calc(100% - 60px);
  width: 440px;
  max-width: min(440px, 92%);
  padding: 20px;
}

.projects-shelf-stage .shelf-detail-panel.is-active {
  transform: translateY(-50%) translateX(0);
}

.projects-shelf-stage .shelf-drag-hint {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
}

.projects-shelf-stage .shelf-loader {
  position: absolute;
  inset: 0;
  border-radius: 12px;
}

@media (max-width: 900px) {
  .projects-shelf-stage {
    height: 600px;
  }

  .shelf-tip-pill {
    display: none;
  }

  .projects-shelf-stage .shelf-detail-panel {
    left: 8px;
    right: 8px;
    width: auto;
    max-height: 56%;
    top: auto;
    bottom: 40px;
    transform: translateY(20px);
    padding: 18px 20px;
  }

  .projects-shelf-stage .shelf-detail-panel.is-active {
    transform: translateY(0);
  }

  .projects-shelf-stage .shelf-drag-hint {
    bottom: 8px;
    font-size: 0.65rem;
    padding: 4px 12px;
  }
}

@media (max-width: 680px) {
  .projects-header-actions {
    width: 100%;
    justify-content: space-between;
    margin-left: 0;
    margin-top: 8px;
  }
}