/* D3RF v4 -- Styles principaux + Mega interactions */
/* Herite de v3-styles.css + nouveaux chantiers v4 */

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  /* Fond et surfaces */
  --bg-primary: #FAFAF8;
  --bg-surface: #FFFFFF;
  --bg-elevated: #F7F7F5;
  --bg-section-alt: #F4F3F0;

  /* Bordures */
  --border: #E0DED8;
  --border-hover: #C8C5BC;

  /* Noeuds et connexions */
  --node-default: #C8C5BC;
  --node-active: #0A0A0A;
  --line-default: #DDD9D2;
  --line-active: #0A0A0A;

  /* Typographie */
  --text-primary: #1A1A18;
  --text-secondary: #6B6960;
  --text-muted: #7A7770;
  --text-code: #4A4840;

  /* Effets */
  --glow: rgba(10, 10, 10, 0.06);
  --shadow-card: 0 2px 12px rgba(10, 10, 10, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(10, 10, 10, 0.08);
  --shadow-modal: 0 32px 80px rgba(10, 10, 10, 0.16);

  /* Animations */
  --ease-card: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-expand: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-menu: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --nav-size: 48px;
  --section-padding: clamp(80px, 10vw, 140px);
  --container-max: 1200px;
  --grid-gap: 24px;
}

/* ============================================================
   BASE OVERRIDES
   ============================================================ */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'KoHo', sans-serif;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--node-default); }

/* ============================================================
   NAVIGATION V4 (identique v3)
   ============================================================ */
.nav-trigger {
  position: fixed;
  top: 24px;
  left: 24px;
  width: var(--nav-size);
  height: var(--nav-size);
  background: #FFFFFF;
  border: 2px solid #0A0A0A;
  border-radius: 50%;
  cursor: pointer;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease-card),
              box-shadow 0.3s ease,
              background 0.25s ease;
  padding: 0;
  box-shadow: 0 2px 8px rgba(10,10,10,0.10);
}

.nav-trigger:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(10, 10, 10, 0.18);
  background: #F5F5F3;
}

.nav-trigger:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
}

.nav-trigger-svg {
  width: 22px;
  height: 22px;
  transition: transform 0.4s var(--ease-menu);
}

.nav-trigger.is-open .nav-trigger-svg {
  transform: rotate(45deg);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-lines-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.nav-line {
  stroke: var(--line-default);
  stroke-width: 1;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  transition: stroke-dashoffset 0.5s var(--ease-card);
}

.nav-overlay.is-open .nav-line {
  stroke-dashoffset: 0;
}

.nav-item {
  position: absolute;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.4s var(--ease-menu), transform 0.4s var(--ease-menu);
}

.nav-overlay.is-open .nav-item {
  opacity: 1;
  transform: scale(1);
}

.nav-overlay.is-open .nav-item:nth-child(3) { transition-delay: 0.05s; }
.nav-overlay.is-open .nav-item:nth-child(4) { transition-delay: 0.10s; }
.nav-overlay.is-open .nav-item:nth-child(5) { transition-delay: 0.15s; }
.nav-overlay.is-open .nav-item:nth-child(6) { transition-delay: 0.20s; }

.nav-item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-item-node {
  width: 10px;
  height: 10px;
  background: var(--node-active);
  border-radius: 50%;
  transition: transform 0.3s var(--ease-expand), box-shadow 0.3s ease;
}

.nav-item a:hover .nav-item-node {
  transform: scale(1.6);
  box-shadow: 0 0 12px rgba(10, 10, 10, 0.3);
}

.nav-item-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.nav-item a:hover .nav-item-label {
  color: var(--text-primary);
}

@media (max-width: 767px) {
  .nav-item {
    position: relative !important;
    top: auto !important;
    right: auto !important;
    left: auto !important;
    bottom: auto !important;
    transform: translateY(20px) scale(0.9);
    opacity: 0;
    transition: opacity 0.4s var(--ease-menu), transform 0.4s var(--ease-menu);
  }

  .nav-overlay.is-open .nav-item {
    transform: translateY(0) scale(1);
    opacity: 1;
  }

  .nav-items-mobile {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 48px;
  }

  .nav-item a {
    flex-direction: row;
    gap: 16px;
  }

  .nav-item-label {
    font-size: 1.1rem;
  }
}

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
}

#hero .page-container {
  flex: 1;
  min-height: 100vh;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  /* Visible par defaut: si JS echoue, le lien reste accessible */
  opacity: 0.3;
  transition: opacity 0.6s ease;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-secondary);
}

.scroll-indicator.is-visible {
  opacity: 1;
}

.scroll-indicator-line {
  width: 1px;
  height: 32px;
  background: var(--node-default);
  animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50% { transform: scaleY(1.4); opacity: 1; }
}

.scroll-indicator-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================================
   SCRUBBER
   ============================================================ */
/* Skip button — visible pendant l'animation */
.anim-skip {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
  color: var(--text-muted);
  opacity: 0.7;
  transition: opacity 0.3s, color 0.2s, border-color 0.2s;
}
.anim-skip:hover {
  opacity: 1;
  color: var(--text-primary);
  border-color: var(--node-active);
}
.anim-skip.is-hidden { display: none; }

/* Mini controles post-anim (replay + vitesse) */
.anim-controls {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  display: none;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(250, 250, 248, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0.35;
  transition: opacity 0.3s;
}
.anim-controls:hover { opacity: 1; }
.anim-controls.is-visible { display: flex; }

.anim-replay {
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
}
.anim-replay:hover {
  color: var(--text-primary);
  transform: scale(1.15);
}

.anim-speed {
  display: flex;
  gap: 3px;
}

.anim-speed-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.5rem;
  padding: 2px 4px;
  border: 1px solid transparent;
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  color: var(--text-muted);
  transition: border-color 0.2s, color 0.2s;
}
.anim-speed-btn.is-active {
  color: var(--text-primary);
  border-color: var(--border);
}
.anim-speed-btn:hover { color: var(--text-primary); }

/* ============================================================
   SECTIONS COMMUNES
   ============================================================ */
.section-wrapper {
  padding: var(--section-padding) 0;
}

.section-wrapper:nth-of-type(even) {
  background: var(--bg-section-alt);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 60px);
}

.section-header {
  margin-bottom: clamp(40px, 6vw, 80px);
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--node-default);
  border-radius: 50%;
}

.section-title {
  font-family: 'KoHo', sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--text-primary);
  line-height: 1.2;
}

.section-subtitle {
  font-family: 'KoHo', sans-serif;
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 480px;
}

/* ============================================================
   PORTFOLIO
   ============================================================ */
#portfolio {
  background: var(--bg-primary);
}

.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.filter-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.25s var(--ease-card);
  white-space: nowrap;
}

.filter-pill:hover {
  border-color: var(--node-active);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.filter-pill.is-active {
  background: var(--node-active);
  border-color: var(--node-active);
  color: #FAFAF8;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

@media (max-width: 1023px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 639px) {
  .portfolio-grid { grid-template-columns: 1fr; }
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-surface);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: transform 0.4s var(--ease-card),
              box-shadow 0.4s var(--ease-card),
              border-color 0.4s ease;
  will-change: transform, box-shadow;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-hover);
}

.project-card.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.95);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.card-visual {
  position: relative;
  padding-top: 62.5%;
  background: var(--bg-elevated);
  overflow: hidden;
}

.card-visual-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-visual-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
}

.card-visual-placeholder-svg {
  width: 40%;
  max-width: 80px;
  opacity: 0.12;
  filter: grayscale(1);
  transition: opacity 0.6s ease, filter 0.6s ease;
}

.project-card:hover .card-visual-placeholder-svg {
  opacity: 0.25;
}

.card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.6s ease;
}

.project-card:hover .card-img {
  filter: grayscale(0%);
}

@media (hover: none) {
  .card-img { filter: grayscale(0%); }
}

.card-glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  border-radius: 16px;
  transition: opacity 0.6s ease;
}

.project-card:hover .card-glow {
  opacity: 1;
}

.card-header {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.card-node {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--node-default);
  transition: background 0.4s ease, transform 0.4s var(--ease-expand);
  flex-shrink: 0;
}

.project-card:hover .card-node {
  transform: scale(1.4);
}

.card-status {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 3px 8px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.card-status-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}

.card-status--production .card-status-dot {
  background: #10B981;
}

.card-status--beta .card-status-dot {
  background: transparent;
  border: 1.5px solid #F59E0B;
}

.card-status--experimental .card-status-dot {
  background: transparent;
  border: 1.5px dashed #6B7280;
}

.card-body {
  padding: 16px;
}

.card-title {
  font-family: 'KoHo', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: color 0.4s ease;
  line-height: 1.3;
}

.project-card:hover .card-title {
  color: var(--card-accent, var(--text-primary));
}

.card-pitch {
  font-family: 'KoHo', sans-serif;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.card-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-elevated);
  white-space: nowrap;
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(10, 10, 10, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  pointer-events: none;
  transition: background 0.3s ease;
}

.modal-overlay.is-open {
  pointer-events: all;
  background: rgba(10, 10, 10, 0.75);
}

.modal-card {
  background: var(--bg-surface);
  border-radius: 16px;
  width: 100%;
  max-width: 720px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.85);
  opacity: 0;
  box-shadow: var(--shadow-modal);
  transition: transform 0.5s var(--ease-expand), opacity 0.3s ease;
}

.modal-overlay.is-open .modal-card {
  transform: scale(1);
  opacity: 1;
}

.modal-accent-bar {
  height: 4px;
  background: var(--card-accent, var(--node-active));
  border-radius: 16px 16px 0 0;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  z-index: 10;
}

.modal-close:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
  transform: scale(1.1);
}

.modal-visual {
  position: relative;
  padding-top: 50%;
  background: var(--bg-elevated);
  overflow: hidden;
}

.modal-visual-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-visual-placeholder {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.modal-body {
  padding: 28px 32px 32px;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.modal-title {
  font-family: 'KoHo', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.modal-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  flex-shrink: 0;
  margin-top: 4px;
}

.modal-description {
  font-family: 'KoHo', sans-serif;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.modal-stack-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.modal-stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 28px;
}

.modal-stack-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-code);
  background: var(--bg-elevated);
}

.modal-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'KoHo', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--bg-surface);
  background: var(--card-accent, var(--node-active));
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  transition: transform 0.2s var(--ease-expand), box-shadow 0.2s ease;
}

.modal-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(10, 10, 10, 0.15);
}

.modal-cta-arrow {
  transition: transform 0.2s ease;
}

.modal-cta:hover .modal-cta-arrow {
  transform: translateX(3px);
}

/* ============================================================
   LAB NOTES / TIMELINE
   ============================================================ */
#lab-notes {
  background: var(--bg-section-alt);
}

.epochs-nav-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: clamp(40px, 5vw, 72px);
}

.epoch-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 16px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  transition: all 0.25s ease;
}

.epoch-pill:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.epoch-pill.is-active {
  color: var(--bg-surface);
  border-color: transparent;
  background: var(--epoch-color, var(--node-active));
}

.timeline-wrapper {
  position: relative;
}

.timeline-spine {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  transform: translateX(-50%);
  width: 40px;
  pointer-events: none;
}

.timeline-spine-path {
  stroke: var(--line-default);
  stroke-width: 1.5;
  fill: none;
  /* dasharray/dashoffset gere par JS scroll-driven */
}

.timeline-entries {
  position: relative;
}

.timeline-entry {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: clamp(48px, 6vw, 88px);
  position: relative;
}

.timeline-entry:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-entry-content {
  flex: 1;
  padding: 0 clamp(24px, 4vw, 56px);
}

.timeline-entry-spacer {
  visibility: hidden;
}

.timeline-dot-wrapper {
  width: 40px;
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  padding-top: 4px;
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--epoch-color, var(--node-active));
  border: 2px solid var(--bg-section-alt);
  box-shadow: 0 0 0 1px var(--epoch-color, var(--node-active));
  transition: transform 0.3s var(--ease-expand);
}

.timeline-entry:hover .timeline-dot {
  transform: scale(1.5);
}

.timeline-entry-year {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--epoch-color, var(--text-muted));
  margin-bottom: 6px;
}

.timeline-entry-title {
  font-family: 'KoHo', sans-serif;
  font-weight: 700;
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 8px;
}

.timeline-entry-pitch {
  font-family: 'KoHo', sans-serif;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

/* v10: Timeline images */
.timeline-entry-image {
  position: relative;
  margin-bottom: 12px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-elevated);
}

.timeline-entry-image img {
  display: block;
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  object-position: center 20%;
  filter: grayscale(100%) contrast(1.1);
  transition: filter 0.6s ease;
}

.timeline-entry:hover .timeline-entry-image img {
  filter: grayscale(0%) contrast(1);
}

@media (hover: none) {
  .timeline-entry-image img { filter: grayscale(0%); }
}

.timeline-entry-illustration {
  background: transparent;
}

.timeline-svg-illustration {
  display: block;
  width: 100%;
  height: auto;
  max-height: 180px;
  border-radius: 8px;
  opacity: 0.85;
  transition: opacity 0.4s ease;
}

.timeline-entry:hover .timeline-svg-illustration {
  opacity: 1;
}

.timeline-entry-credit {
  position: absolute;
  bottom: 0;
  right: 0;
  padding: 2px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.5rem;
  color: rgba(255,255,255,0.7);
  background: rgba(0,0,0,0.5);
  border-radius: 8px 0 0 0;
}

.timeline-entry-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.timeline-entry-link:hover {
  color: var(--text-primary);
}

.is-hidden-pre {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-entry.is-hidden-pre {
  opacity: 0;
  transform: translateY(20px);
}

.reveal-on-scroll:not(.is-hidden-pre) {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 60px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.footer-logo-nodes {
  display: flex;
  gap: 4px;
}

.footer-logo-node {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--node-default);
}

.footer-brand-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-credit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ============================================================
   V9 -- CIRCLE HOVER: Simple fill (remplace HAL 9000)
   ============================================================ */

/* Conteneur relatif pour accueillir les overlays easter eggs */
#logo-container {
  position: relative;
}

/* Les cercles SVG: hover = remplissage noir simple */
#Groupe_rond circle {
  transition: fill 0.3s ease, stroke-width 0.3s ease;
  cursor: pointer;
}

/* ============================================================
   V4 -- CHANTIER 2: HOVER D/3/R/F -- Vibration + clone colore
   ============================================================ */

/* Les lettres D3RF ont cursor pointer apres animationComplete */
#d3rf-d, #d3rf-3, #d3rf-r, #d3rf-f {
  cursor: pointer;
}

/* Clone colore injecte par JS juste avant la lettre originale */
.d3rf-letter-clone {
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.d3rf-letter-clone.is-visible {
  opacity: 0.35;
}

/* Vibration: keyframe JS-driven via requestAnimationFrame */

/* ============================================================
   V4 -- CHANTIER 3: SPLIT-FLAP colonne droite
   Effet tableau d'aeroport sur click D/R/F
   ============================================================ */

/* Cacher les textes droite au chargement (evite flash avant animation) */
.right-text-line {
  position: relative;
  width: 100%;
  height: 100%;
  justify-content: flex-start;
  perspective: 400px;
  opacity: 0;
}
/* Le JS ajoute cette classe quand l'animation est prete */
.right-text-line.is-ready {
  opacity: 1;
}

/* Conteneur split-flap par mot */
.split-flap-word {
  display: inline-flex;
  gap: 0;
}

/* Chaque lettre split-flap */
.split-flap-char {
  display: inline-block;
  overflow: hidden;
  position: relative;
}

/* Animation split-flap sortante (vers le haut) */
@keyframes splitFlap-out {
  0% {
    transform: rotateX(0deg) scaleY(1);
    opacity: 1;
  }
  50% {
    transform: rotateX(45deg) scaleY(0.5);
    opacity: 0.5;
  }
  100% {
    transform: rotateX(90deg) scaleY(0);
    opacity: 0;
  }
}

/* Animation split-flap entrante (depuis le bas) */
@keyframes splitFlap-in {
  0% {
    transform: rotateX(-90deg) scaleY(0);
    opacity: 0;
  }
  50% {
    transform: rotateX(-45deg) scaleY(0.5);
    opacity: 0.5;
  }
  100% {
    transform: rotateX(0deg) scaleY(1);
    opacity: 1;
  }
}

.split-flap-char.flapping-out {
  animation: splitFlap-out 0.18s ease-in forwards;
  transform-origin: center bottom;
}

.split-flap-char.flapping-in {
  animation: splitFlap-in 0.18s ease-out forwards;
  transform-origin: center top;
}

/* ============================================================
   V4 -- CHANTIER 4: CLICK "3" -- Eventail D3RF
   ============================================================ */

/* Les letters D3RF dans le SVG: transform-origin pour l'eventail */
#D3RF {
  /* Le group entier: permettre les transforms individuels */
}

/* Classe actif sur le groupe D3RF quand l'eventail est ouvert */
#D3RF.fan-open #d3rf-d {
  transform: rotate(-25deg);
  transform-origin: 462px 458.5px; /* centre du "3" en viewBox coords */
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#D3RF.fan-open #d3rf-r {
  transform: rotate(15deg);
  transform-origin: 462px 458.5px;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.04s;
}

#D3RF.fan-open #d3rf-f {
  transform: rotate(30deg);
  transform-origin: 462px 458.5px;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.08s;
}

#D3RF #d3rf-d,
#D3RF #d3rf-r,
#D3RF #d3rf-f {
  transition: transform 0.4s var(--ease-card);
}

/* Micro tremblement au hover du "3" */
@keyframes letterMicroShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-1px); }
  75% { transform: translateX(1px); }
}

#d3rf-3.micro-shaking {
  animation: letterMicroShake 0.2s ease infinite;
}

/* ============================================================
   V4 -- CHANTIER 5: CLICK ROND01 -- Mode gomme
   ============================================================ */

/* Curseur gomme quand mode actif */
body.eraser-mode-active {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Crect x='4' y='10' width='16' height='10' rx='2' fill='%23f9a8a8' stroke='%23cc0000' stroke-width='1.5'/%3E%3Cline x1='4' y1='15' x2='20' y2='15' stroke='%23cc0000' stroke-width='1'/%3E%3C/svg%3E") 12 12, crosshair;
}

/* ============================================================
   V4 -- CHANTIER 6: INTERACTIONS COLONNE GAUCHE
   INNOVATION -> THINK / LAB -> TANK / INTERSECTIONS -> logo V
   ============================================================ */

/* Le texte colonne gauche: cursor pointer sur les mots interactifs */
.left-text-line.interactive {
  cursor: pointer;
  position: relative;
}

.left-text-line.interactive::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--node-default);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.left-text-line.interactive:hover::after {
  transform: scaleX(1);
}

/* Wrapper pour la transition INNOVATION -> THINK */
.left-text-line.text-swap-active {
  position: relative;
  overflow: visible;
}

/* Fusion effet liquefaction pour LAB -> TANK */
@keyframes liquidMelt {
  0% {
    transform: scaleY(1) translateY(0);
    opacity: 1;
  }
  60% {
    transform: scaleY(2.2) translateY(60%);
    opacity: 0.4;
  }
  100% {
    transform: scaleY(3) translateY(120%);
    opacity: 0;
  }
}

@keyframes liquidEmerge {
  0% {
    transform: scaleY(2) translateY(-60%);
    opacity: 0;
  }
  60% {
    transform: scaleY(1.1) translateY(-10%);
    opacity: 0.7;
  }
  100% {
    transform: scaleY(1) translateY(0);
    opacity: 1;
  }
}

.char-melt {
  display: inline-block;
  transform-origin: center bottom;
}

.char-melt.melting {
  animation: liquidMelt 0.5s ease-in forwards;
}

.char-emerge {
  display: inline-block;
  transform-origin: center top;
}

.char-emerge.emerging {
  animation: liquidEmerge 0.5s ease-out forwards;
}

/* Formes V pour INTERSECTIONS */
.intersection-v-svg {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.intersection-v-svg.is-visible {
  opacity: 1;
}

/* ============================================================
   V4 -- HOVER LETTRE D3RF: clone derriere
   ============================================================ */

/* Curseur sur les paths D3RF (applique par JS) */
#d3rf-d { cursor: pointer; }
#d3rf-3 { cursor: pointer; }
#d3rf-r { cursor: pointer; }
#d3rf-f { cursor: pointer; }

/* ============================================================
   PREFERS-REDUCED-MOTION
   Desactive toutes les animations non-essentielles
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .split-flap-char,
  .char-melt,
  .char-emerge,
  .d3rf-letter-clone,
  #D3RF path,
  #Groupe_rond circle,
  #d3rf-3.micro-shaking {
    animation: none !important;
    transition: opacity 0.1s ease !important;
  }
}