/* ═══════════════════════════════════════════════════════════
   VARIABLES & RESET
═══════════════════════════════════════════════════════════ */
:root {
  --bg:          #0a0a0a;
  --bg-card:     #111111;
  --bg-hover:    #1a1a1a;
  --border:      #2a2a2a;
  --border-glow: #555555;
  --text:        #e8e8e8;
  --text-muted:  #666666;
  --text-dim:    #999999;
  --accent:      #d4d4d4;
  --white:       #ffffff;
  --radius:      2px;
  --transition:  0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-serif:  Georgia, 'Times New Roman', serif;
  --font-sans:   'Helvetica Neue', Arial, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ═══════════════════════════════════════════════════════════
   UTILITAIRES
═══════════════════════════════════════════════════════════ */
.hidden {
  display: none !important;
}

/* ═══════════════════════════════════════════════════════════
   SPLASH — PAGE D'ACCUEIL
═══════════════════════════════════════════════════════════ */
.splash {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#splash-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.splash-content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
}

.splash-title-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.splash-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--white);
  text-transform: uppercase;
  line-height: 1;
  /* Subtle glow */
  text-shadow: 0 0 60px rgba(255,255,255,0.12);
  animation: fadeInDown 1.2s ease both;
}

.splash-subtitle {
  font-family: var(--font-sans);
  font-size: clamp(0.75rem, 2vw, 1rem);
  letter-spacing: 0.4em;
  color: var(--text-muted);
  text-transform: uppercase;
  animation: fadeInDown 1.2s 0.2s ease both;
}

.splash-enter {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  padding: 1rem 2.5rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  animation: fadeInUp 1.2s 0.5s ease both;
}

.splash-enter:hover {
  border-color: var(--border-glow);
  color: var(--white);
  background: rgba(255,255,255,0.04);
}

.enter-arrow {
  font-size: 1.2rem;
  animation: bounce 2s 2s infinite;
}

/* ═══════════════════════════════════════════════════════════
   GALERIE
═══════════════════════════════════════════════════════════ */
.gallery {
  min-height: 100vh;
  padding: 0 0 4rem;
}

.gallery-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.btn-back {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-family: var(--font-sans);
  transition: color var(--transition);
  padding: 0.4rem 0;
}

.btn-back:hover {
  color: var(--white);
}

.gallery-count {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ─── GRILLE ─── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--border);
}

/* ─── CARTE ─── */
.card {
  position: relative;
  background: var(--bg-card);
  cursor: pointer;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  list-style: none;
}

.card-img-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              filter 0.6s ease;
  filter: brightness(0.85) contrast(1.05);
}

.card:hover .card-img {
  transform: scale(1.04);
  filter: brightness(1) contrast(1.1);
}

/* Overlay au survol */
.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.75) 0%,
    rgba(0,0,0,0.1) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 1.2rem;
}

.card:hover .card-overlay {
  opacity: 1;
}

.card-label {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  font-family: var(--font-sans);
}

/* Numéro d'index en coin */
.card-index {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  font-size: 0.65rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.1em;
  font-family: var(--font-sans);
  transition: color var(--transition);
}

.card:hover .card-index {
  color: rgba(255,255,255,0.5);
}

/* Ligne décorative en bas */
.card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: rgba(255,255,255,0.4);
  transition: width 0.5s ease;
}

.card:hover::after {
  width: 100%;
}

/* ═══════════════════════════════════════════════════════════
   VISIONNEUSE PLEIN ÉCRAN
═══════════════════════════════════════════════════════════ */
.viewer {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.96);
  cursor: zoom-out;
}

.viewer-stage {
  position: relative;
  z-index: 2;
  max-width: 90vw;
  max-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-img {
  max-width: 90vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  display: block;
  box-shadow: 0 0 80px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,255,255,0.06);
  animation: viewerIn 0.3s ease both;
  /* Légère amélioration du contraste en visionneuse */
  filter: contrast(1.08) brightness(0.97);
}

.viewer-close {
  position: absolute;
  top: 1.2rem;
  right: 1.5rem;
  z-index: 10;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  width: 2.4rem;
  height: 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: border-color var(--transition), color var(--transition);
}

.viewer-close:hover {
  border-color: var(--border-glow);
  color: var(--white);
}

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  width: 3rem;
  height: 5rem;
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.viewer-nav:hover {
  border-color: var(--border-glow);
  color: var(--white);
  background: rgba(255,255,255,0.04);
}

.viewer-prev { left: 1.5rem; }
.viewer-next { right: 1.5rem; }

.viewer-info {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.viewer-id {
  font-family: var(--font-sans);
}

.viewer-counter {
  font-family: var(--font-sans);
}
.viewer-legende {
  font-family: Georgia, serif;
  font-style: italic;
  letter-spacing: 0.05em;
  text-transform: none;
  color: var(--text-muted);
  max-width: 40vw;
  text-align: center;
}
.viewer-legende:empty { display: none; }


/* ═══════════════════════════════════════════════════════════
   ANIMATIONS
═══════════════════════════════════════════════════════════ */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

@keyframes viewerIn {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes cardReveal {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════
   TRANSITIONS ENTRE PAGES
═══════════════════════════════════════════════════════════ */
.gallery.fade-in {
  animation: fadeInPage 0.6s ease both;
}

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

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════ */
@media (max-width: 600px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .viewer-nav {
    width: 2.2rem;
    height: 3.5rem;
    font-size: 1.3rem;
  }

  .viewer-prev { left: 0.5rem; }
  .viewer-next { right: 0.5rem; }

  .gallery-header {
    padding: 1rem 1rem;
  }
}

@media (max-width: 400px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════
   SCROLLBAR DISCRÈTE
═══════════════════════════════════════════════════════════ */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-glow);
}

/* ═══════════════════════════════════════════════════════════
   FOCUS VISIBLE (ACCESSIBILITÉ)
═══════════════════════════════════════════════════════════ */
:focus-visible {
  outline: 1px solid rgba(255,255,255,0.4);
  outline-offset: 2px;
}