/* ===== IAF Chronologies v2 — bandes par époque + bandeaux à images ===== */
.iafchr{--c1:#17dff2;--c2:#7df9ff;--ink:#eaf6ff;--dim:rgba(234,246,255,.62);
  --line:rgba(23,223,242,.22);--card:rgba(10,18,40,.72);
  color:var(--ink);margin:0 0 72px}

/* En-tête de page */
.iafchr-intro{max-width:820px;margin:0 auto 44px;text-align:center}
.iafchr-intro h2{font-size:clamp(1.5rem,3.4vw,2.3rem);margin:0 0 12px;line-height:1.2}
.iafchr-intro p{color:var(--dim);font-size:1.02rem;line-height:1.65;margin:0}

/* Navigation entre frises */
.iafchr-nav{position:sticky;top:0;z-index:30;display:flex;gap:8px;flex-wrap:wrap;
  justify-content:center;padding:12px 8px;margin-bottom:34px;
  background:linear-gradient(180deg,rgba(6,10,24,.94),rgba(6,10,24,.72));
  backdrop-filter:blur(9px);border-bottom:1px solid var(--line)}
.iafchr-nav a{--k:#17dff2;display:inline-flex;align-items:center;gap:7px;padding:8px 15px;border-radius:99px;
  border:1px solid rgba(255,255,255,.14);color:var(--dim);text-decoration:none!important;font-size:.87rem;
  font-weight:600;transition:.28s;box-shadow:none}
.iafchr-nav a:hover,.iafchr-nav a:focus{color:#fff;border-color:var(--k);background:rgba(255,255,255,.05);text-decoration:none!important}
.iafchr-nav a i{width:8px;height:8px;border-radius:50%;background:var(--k);font-style:normal;flex:none}

/* Bloc de frise */
.iafchr-blk{max-width:1120px;margin:0 auto;padding:0 14px;scroll-margin-top:104px}
.iafchr-h{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:6px}
.iafchr-h h3{font-size:clamp(1.2rem,2.5vw,1.72rem);margin:0;line-height:1.25}
.iafchr-tag{font-size:.72rem;letter-spacing:1.2px;text-transform:uppercase;font-weight:700;
  padding:4px 11px;border-radius:99px;border:1px solid currentColor;opacity:.9}
.iafchr-sub{color:var(--dim);font-size:.95rem;margin:0 0 26px;line-height:1.6;max-width:780px}

/* ============ FRISE 1 — BANDES PAR ÉPOQUE (lecture nette) ============ */
.iafchr-bd{display:flex;flex-direction:column;gap:13px}
.iafchr-bd-row{display:grid;grid-template-columns:168px 1fr;gap:18px;align-items:center;
  background:rgba(10,18,40,.52);border:1px solid rgba(255,255,255,.07);
  border-left:3px solid var(--bc);border-radius:12px;padding:12px 20px}
.iafchr-bd-side b{display:block;font-size:.93rem;color:var(--bc);line-height:1.25}
.iafchr-bd-side span{display:block;font-size:.73rem;color:var(--dim);margin-top:3px;
  font-variant-numeric:tabular-nums;letter-spacing:.3px}
.iafchr-bd-track{position:relative;height:126px;min-width:0}
.iafchr-bd-line{position:absolute;left:0;right:0;top:34px;height:2px;border-radius:99px;
  background:rgba(255,255,255,.10);overflow:hidden}
.iafchr-bd-fill{height:100%;width:0;border-radius:99px;background:var(--bc);
  transition:width .85s cubic-bezier(.2,.7,.2,1)}
.iafchr-bd-pt{position:absolute;top:34px;width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;
  border:2px solid var(--bc);background:#0a1226;cursor:pointer;padding:0;z-index:3;
  transition:transform .22s,box-shadow .22s}
.iafchr-bd-pt:hover{transform:scale(1.3)}
.iafchr-bd-pt.past{background:var(--bc)}
.iafchr-bd-pt.on{transform:scale(1.55);box-shadow:0 0 0 6px rgba(255,255,255,.12)}
.iafchr-bd-lab{position:absolute;top:54px;transform:translateX(-50%);text-align:center;
  pointer-events:none;width:180px}
.iafchr-bd-lab em{display:block;font-style:normal;font-size:.73rem;font-weight:700;
  color:var(--bc);font-variant-numeric:tabular-nums}
.iafchr-bd-lab i{display:block;font-style:normal;font-size:.77rem;color:var(--dim);
  line-height:1.28;margin-top:2px}

/* ============ FRISE 2 — SPIRALE ============ */
.iafchr-sp{position:relative;margin:6px auto 0;max-width:660px}
.iafchr-sp svg{width:100%;height:auto;display:block;overflow:visible}
.iafchr-sp path.trk{fill:none;stroke:rgba(255,255,255,.09);stroke-width:2.5;stroke-linecap:round}
.iafchr-sp path.adv{fill:none;stroke:url(#iafchr-grad);stroke-width:3;stroke-linecap:round;
  filter:drop-shadow(0 0 6px rgba(23,223,242,.55))}
.iafchr-sp circle.pt{cursor:pointer;transition:r .22s,fill .22s}
.iafchr-sp circle.pt:hover{stroke:#fff;stroke-width:2}
.iafchr-sp text{font-size:9.5px;fill:var(--dim);font-variant-numeric:tabular-nums;pointer-events:none}
.iafchr-sp text.on{fill:#fff;font-weight:700}

/* ============ FRISES 3-4 — BANDEAU HORIZONTAL À IMAGES ============ */
.iafchr-ba{position:relative;padding-top:4px}
.iafchr-ba-rail{position:absolute;left:0;right:0;top:0;height:3px;border-radius:99px;
  background:rgba(255,255,255,.08);overflow:hidden}
.iafchr-ba-railfill{height:100%;width:0;border-radius:99px;
  transition:width .8s cubic-bezier(.2,.7,.2,1);background:var(--c1)}
.iafchr-ba-strip{display:flex;gap:14px;overflow-x:auto;padding:22px 4px 16px;
  scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
  scrollbar-width:thin;scrollbar-color:rgba(23,223,242,.38) transparent}
.iafchr-ba-strip::-webkit-scrollbar{height:7px}
.iafchr-ba-strip::-webkit-scrollbar-track{background:transparent}
.iafchr-ba-strip::-webkit-scrollbar-thumb{background:rgba(23,223,242,.32);border-radius:99px}
.iafchr-ba-card{flex:0 0 194px;scroll-snap-align:center;padding:0;cursor:pointer;text-align:left;
  background:rgba(10,18,40,.62);border:1px solid rgba(255,255,255,.08);border-radius:14px;
  overflow:hidden;opacity:0;transform:translateY(12px);
  animation:iafchr-up .55s ease-out forwards;transition:border-color .25s,box-shadow .25s}
.iafchr-ba-card:nth-child(1){animation-delay:.04s}
.iafchr-ba-card:nth-child(2){animation-delay:.12s}
.iafchr-ba-card:nth-child(3){animation-delay:.20s}
.iafchr-ba-card:nth-child(4){animation-delay:.28s}
.iafchr-ba-card:nth-child(5){animation-delay:.36s}
.iafchr-ba-card:nth-child(6){animation-delay:.44s}
.iafchr-ba-card:nth-child(7){animation-delay:.52s}
.iafchr-ba-card:nth-child(8){animation-delay:.60s}
.iafchr-ba-card:nth-child(9){animation-delay:.68s}
.iafchr-ba-card:nth-child(10){animation-delay:.76s}
.iafchr-ba-card:nth-child(11){animation-delay:.84s}
.iafchr-ba-card:nth-child(12){animation-delay:.92s}
.iafchr-ba-card.on{border-color:var(--bc);box-shadow:0 0 0 1px var(--bc),0 12px 34px rgba(0,0,0,.42)}
.iafchr-ba-media{position:relative;aspect-ratio:16/10;background:#0a1226;overflow:hidden}
.iafchr-ba-media img{width:100%;height:100%;object-fit:cover;display:block;
  filter:grayscale(.55) brightness(.84);transition:filter .38s,transform .5s}
.iafchr-ba-card.on .iafchr-ba-media img,
.iafchr-ba-card:hover .iafchr-ba-media img,
.iafchr-ba-card:focus-visible .iafchr-ba-media img{filter:none;transform:scale(1.05)}
.iafchr-ba-year{position:absolute;left:9px;top:9px;padding:3px 10px;border-radius:99px;
  background:rgba(6,10,24,.86);border:1px solid rgba(255,255,255,.18);color:#fff;
  font-size:.74rem;font-weight:700;font-variant-numeric:tabular-nums}
.iafchr-ba-body{padding:11px 12px 14px}
.iafchr-ba-body strong{display:block;font-size:.85rem;line-height:1.32;color:var(--ink)}
.iafchr-ba-card.on .iafchr-ba-body strong{color:var(--bc)}
@keyframes iafchr-up{to{opacity:1;transform:translateY(0)}}

/* ============ CARTES DE LECTURE (communes) ============ */
.iafchr-read{margin-top:20px;background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:20px 22px;min-height:112px}
.iafchr-read .when{font-size:.8rem;letter-spacing:1.1px;text-transform:uppercase;font-weight:700;
  color:var(--c1);margin-bottom:7px}
.iafchr-read h4{margin:0 0 9px;font-size:1.08rem;line-height:1.35}
.iafchr-read p{margin:0;color:var(--dim);font-size:.95rem;line-height:1.62}
.iafchr-ctrl{display:flex;gap:10px;align-items:center;margin-top:16px;flex-wrap:wrap}
.iafchr-btn{cursor:pointer;border:1px solid var(--line);background:rgba(23,223,242,.08);color:var(--c2);
  padding:9px 17px;border-radius:99px;font-size:.86rem;font-weight:600;transition:.25s}
.iafchr-btn:hover{background:rgba(23,223,242,.18);border-color:var(--c1)}
.iafchr-count{font-size:.82rem;color:var(--dim);margin-left:auto;font-variant-numeric:tabular-nums}
.iafchr-count b{color:var(--c2)}

/* Accessibilité & mobile */
@media (prefers-reduced-motion: reduce){
  .iafchr-ba-card{animation:none!important;opacity:1!important;transform:none!important}
  .iafchr-bd-fill,.iafchr-ba-railfill{transition:none!important}
}
@media (max-width:900px){
  .iafchr-bd-row{grid-template-columns:1fr;gap:8px;padding:12px 14px}
  .iafchr-bd-track{height:104px}
}
@media (max-width:700px){
  .iafchr-bd-lab{width:132px;font-size:.72rem}
  .iafchr-bd-lab i{font-size:.71rem}
  .iafchr-ba-card{flex:0 0 160px}
  .iafchr-ba-body strong{font-size:.79rem}
  .iafchr-read{padding:16px}
  .iafchr-nav a{font-size:.79rem;padding:7px 12px}
}