/* ============================================================
   Résolution IA — feuille de style commune
   Système visuel extrait de index.html (design orange).
   Palette et typographie : voir charte.md.
   ============================================================ */

:root{
  --orange:#FF4801;
  --orange-dark:#D93E00;
  --orange-soft:#FFE6DC;
  --paper:#FBF8F2;
  --ink:#161310;
  --ink-60:rgba(22,19,16,.62);
  --line:rgba(22,19,16,.14);
  --card:#FFFFFF;
  --dark:#16130F;
  --dark-line:rgba(251,248,242,.16);
  --green:#12A159;
  --red:#D6402B;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,monospace;
  --sans:'Space Grotesk',system-ui,-apple-system,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--orange);color:#fff}
img{max-width:100%;height:auto;display:block}

/* ---------- mise en page ---------- */
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 24px}
section{padding:96px 0;scroll-margin-top:76px}
@media(max-width:720px){section{padding:64px 0}}

/* ---------- typographie ---------- */
h1{font-size:clamp(38px,6.4vw,62px);line-height:1.04;letter-spacing:-.03em;font-weight:700}
h2{font-size:clamp(28px,4.4vw,44px);line-height:1.08;letter-spacing:-.02em;font-weight:700;margin-bottom:20px}
h3{font-size:clamp(19px,2.2vw,24px);line-height:1.25;letter-spacing:-.01em;font-weight:700}
h1 em,h2 em,h3 em{font-style:normal;color:var(--orange)}
p+p{margin-top:16px}

.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--orange);font-weight:600;display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange)}
.lead{font-size:clamp(17px,2vw,20px);color:var(--ink-60);max-width:660px}
.lead b{color:var(--ink)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- boutons ---------- */
.btn{
  font-family:var(--mono);font-size:14px;font-weight:600;letter-spacing:.03em;
  text-decoration:none;border-radius:8px;padding:15px 24px;display:inline-block;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
  min-height:44px;
}
.btn:active{transform:scale(.97)}
.btn-o{background:var(--orange);color:#fff;box-shadow:0 6px 20px rgba(255,72,1,.32);border:none;cursor:pointer}
.btn-o:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,72,1,.4)}
.btn-g{border:1.5px solid var(--ink);color:var(--ink);background:none;cursor:pointer}
.btn-g:hover{background:var(--ink);color:var(--paper)}
.link-a{font-family:var(--mono);font-size:13.5px;font-weight:600;color:var(--orange);text-decoration:none}
.link-a:hover{text-decoration:underline}

:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:4px}

/* ---------- navigation ---------- */
nav{
  position:sticky;top:0;z-index:80;
  background:rgba(251,248,242,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
nav .logo{font-weight:700;letter-spacing:-.02em;text-decoration:none;color:var(--ink);font-size:17px}
nav .logo b{color:var(--orange)}
nav .links{display:flex;gap:4px;font-family:var(--mono);font-size:13px;align-items:center}
nav .links>a,.drop>button{
  color:var(--ink-60);text-decoration:none;background:none;border:none;cursor:pointer;
  font-family:var(--mono);font-size:13px;padding:8px 12px;border-radius:6px;
  transition:color .2s,background-color .2s;
}
nav .links>a:hover,.drop>button:hover{color:var(--orange);background:var(--orange-soft)}
nav .links a.cta{background:var(--orange);color:#fff;border-radius:100px;padding:9px 18px;font-weight:600}
nav .links a.cta:hover{color:#fff;background:var(--orange-dark);transform:translateY(-1px)}

/* menus déroulants : CSS pur au survol, focus clavier pris en charge */
.drop{position:relative}
.drop>button::after{content:" ▾";opacity:.6}
.drop-menu{
  position:absolute;top:calc(100% + 6px);left:0;min-width:250px;z-index:90;
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  box-shadow:0 18px 40px rgba(22,19,16,.12);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
}
.drop:hover .drop-menu,.drop:focus-within .drop-menu{opacity:1;visibility:visible;transform:none}
.drop-menu a{
  display:block;padding:10px 12px;border-radius:8px;text-decoration:none;
  color:var(--ink);font-family:var(--mono);font-size:13px;transition:background-color .15s,color .15s;
}
.drop-menu a:hover{background:var(--orange-soft);color:var(--orange)}
.drop-menu .sep{border-top:1px solid var(--line);margin:6px 0}
.drop-menu a.all{color:var(--orange);font-weight:600}

/* burger + menu mobile */
.burger{display:none;background:none;border:0;cursor:pointer;width:44px;height:44px;padding:10px}
.burger span{display:block;height:2px;background:var(--ink);margin:5px 0;transition:transform .2s,opacity .2s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mnav{display:none;background:var(--card);border-bottom:1px solid var(--line);padding:8px 24px 20px}
.mnav[hidden]{display:none}
.mnav a{display:block;padding:13px 0;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;font-family:var(--mono);font-size:14px}
.mnav details summary{
  padding:13px 0;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:14px;
  cursor:pointer;list-style:none;
}
.mnav details summary::-webkit-details-marker{display:none}
.mnav details summary::after{content:" ▾";color:var(--orange)}
.mnav details[open] summary::after{content:" ▴"}
.mnav details a{padding-left:16px;font-size:13px;color:var(--ink-60)}
@media(max-width:900px){
  nav .links{display:none}
  .burger{display:block}
  .mnav.open{display:block}
}

/* ---------- cartes de situation ---------- */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-3,.grid-2{grid-template-columns:1fr}}

.card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:24px;text-decoration:none;color:inherit;
  transition:border-color .18s ease,transform .18s ease;
}
.card:hover{border-color:var(--orange);transform:translateY(-3px)}
.card .cat{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-60);font-weight:600;
}
.card h3{font-size:19px;line-height:1.3}
.card p{font-size:15.5px;color:var(--ink-60);flex:1}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid var(--line)}
.gain{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--green);font-variant-numeric:tabular-nums}
.badge{
  font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;border:1px solid var(--line);color:var(--ink-60);
}
.badge.b1{border-color:var(--green);color:var(--green)}
.badge.b2{border-color:#B8860B;color:#8a6508}
.badge.b3{border-color:var(--red);color:var(--red)}
.card-go{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--orange)}
.card:hover .card-go::after{content:" →"}

/* ---------- filtres ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
.filters a,.filters button{
  font-family:var(--mono);font-size:13px;font-weight:600;padding:10px 18px;min-height:44px;
  border-radius:999px;border:1px solid var(--line);background:none;color:var(--ink-60);
  cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;
  transition:border-color .16s,color .16s,background-color .16s;
}
.filters a:hover,.filters button:hover{border-color:var(--orange);color:var(--orange)}
.filters .on{background:var(--ink);border-color:var(--ink);color:var(--paper)}

/* ---------- bloc « ce que vous gardez » ---------- */
.keep{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.keep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:36px}
@media(max-width:900px){.keep-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.keep-grid{grid-template-columns:1fr}}
.keep-item h3{font-size:17px;margin-bottom:8px}
.keep-item h3::before{content:"✓";color:var(--green);margin-right:8px;font-weight:700}
.keep-item p{font-size:15px;color:var(--ink-60)}

/* ---------- bandeau CTA ---------- */
.cta-band{background:var(--dark);color:var(--paper);text-align:center}
.cta-band h2{color:var(--paper)}
.cta-band .lead{color:rgba(251,248,242,.7);margin:0 auto}
.cta-band .reassure{
  display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin:28px 0;
  font-family:var(--mono);font-size:13px;color:rgba(251,248,242,.75);
}
.cta-band .reassure span::before{content:"✓ ";color:var(--green);font-weight:700}

/* ---------- avant / après ---------- */
.ba{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-top:32px}
@media(max-width:640px){.ba{grid-template-columns:1fr}}
.ba>div{padding:28px;background:var(--card)}
.ba .after{background:var(--orange-soft)}
.ba .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-60);font-weight:600;margin-bottom:10px}
.ba .val{font-family:var(--mono);font-size:clamp(28px,4vw,40px);font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.ba .after .val{color:var(--orange)}

/* ---------- fil d'ariane ---------- */
.crumb{font-family:var(--mono);font-size:12.5px;color:var(--ink-60);padding-top:28px}
.crumb a{color:var(--ink-60);text-decoration:none}
.crumb a:hover{color:var(--orange)}
.crumb span{margin:0 6px;opacity:.5}

/* ---------- pied de page ---------- */
footer{background:var(--dark);color:rgba(251,248,242,.7);padding:64px 0 32px;font-size:15px}
.foot-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
@media(max-width:860px){.foot-cols{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.foot-cols{grid-template-columns:1fr}}
footer h4{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--paper);font-weight:600;margin-bottom:14px;
}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer a{color:rgba(251,248,242,.7);text-decoration:none;transition:color .18s}
footer a:hover{color:var(--orange)}
.foot-note{
  margin-top:40px;padding-top:24px;border-top:1px solid var(--dark-line);
  font-family:var(--mono);font-size:12.5px;color:rgba(251,248,242,.5);
}
.foot-note p+p{margin-top:10px}

/* ---------- apparition au défilement ---------- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none;filter:none}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  .rv{opacity:1;transform:none}
  html{scroll-behavior:auto}
}