:root{
  --c660-navy:#0f2340;
  --c660-navy-2:#193a5c;
  --c660-ink:#26384d;
  --c660-muted:#607184;
  --c660-cream:#f5f1ea;
  --c660-cream-2:#ebe5dc;
  --c660-white:#fff;
  --c660-gold:#c9a84c;
  --c660-gold-soft:rgba(201,168,76,.12);
  --c660-gold-line:rgba(201,168,76,.28);
  --c660-green:#167347;
  --c660-green-bg:#eef8f2;
  --c660-red:#9d2d2d;
  --c660-red-bg:#fff1f1;
  --c660-blue-bg:#eef5fb;
  --c660-radius:12px;
  --c660-shadow:0 16px 44px rgba(15,35,64,.09);
}
.c660-page,.c660-page *{box-sizing:border-box}
.c660-page{font-family:'DM Sans',Arial,sans-serif;color:var(--c660-ink);background:var(--c660-cream);line-height:1.65;overflow:hidden}
.c660-page a{color:inherit}
.c660-page h1,.c660-page h2,.c660-page h3{font-family:'Playfair Display',Georgia,serif;color:var(--c660-navy);line-height:1.16;margin:0}
.c660-page p{margin:0 0 14px}
.c660-page strong{color:var(--c660-navy)}

.c660-section{padding:70px 0}
.c660-section--white{background:#fff}
.c660-section--soft{background:var(--c660-cream)}
.c660-section--cream{background:var(--c660-cream-2)}
.c660-section--dark{background:var(--c660-navy);color:#dbe3eb}
.c660-eyebrow{display:block;margin-bottom:10px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--c660-gold)}
.c660-title{font-size:clamp(27px,3.4vw,42px);max-width:800px}
.c660-title em{font-style:normal;color:var(--c660-gold)}
.c660-lead{max-width:760px;font-size:16px;color:var(--c660-muted);margin-top:14px}
.c660-section--dark .c660-title,.c660-section--dark h3{color:#fff}
.c660-section--dark .c660-lead{color:#c6d1dc}
.c660-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:6px;text-decoration:none;font-size:14px;font-weight:700;transition:.2s ease;border:1px solid transparent}
.c660-btn--gold{background:var(--c660-gold);color:var(--c660-navy)!important}
.c660-btn--gold:hover{background:#ddc36f;transform:translateY(-1px)}
.c660-btn--line{border-color:var(--c660-gold-line);color:var(--c660-gold)!important;background:var(--c660-gold-soft)}
.c660-btn--line:hover{border-color:var(--c660-gold)}
.c660-cta-note{display:block;margin-top:10px;color:#d7e0e9;font-size:11px;line-height:1.45;text-align:center}
.c660-btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}

/* HERO */
.c660-hero{background:var(--c660-navy);padding:58px 0 0;position:relative}
.c660-hero:before{content:'';position:absolute;right:-180px;top:-220px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(201,168,76,.13),transparent 66%)}
.c660-hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:42px;align-items:start}
.c660-badge{display:inline-flex;gap:8px;align-items:center;padding:7px 12px;border:1px solid var(--c660-gold-line);border-radius:999px;background:var(--c660-gold-soft);color:#ead68f;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px}
.c660-dot{width:7px;height:7px;background:var(--c660-gold);border-radius:50%}
.c660-hero h1{font-size:clamp(20px,4.2vw,48px);color:#fff;max-width:700px}
.c660-hero h1 em{font-style:normal;color:var(--c660-gold)}
.c660-hero-intro{font-size:16px;color:#d4dee7;max-width:700px;margin:18px 0 0}
.c660-hero-list{display:grid;gap:10px;margin:22px 0 0;padding:0;list-style:none}
.c660-hero-list li{display:flex;gap:10px;color:#d7e0e8;font-size:14px}
.c660-check{flex:0 0 20px;width:20px;height:20px;border:1px solid var(--c660-gold-line);background:var(--c660-gold-soft);color:var(--c660-gold);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;margin-top:1px}
.c660-answer{background:#fff;border-radius:var(--c660-radius);overflow:hidden;box-shadow:0 18px 55px rgba(0,0,0,.22)}
.c660-answer-head{background:linear-gradient(135deg,var(--c660-gold),#e4ce87);padding:16px 20px;color:var(--c660-navy);font-weight:800}
.c660-answer-body{padding:20px}
.c660-answer-row{padding:12px 0;border-bottom:1px solid #e8edf2}
.c660-answer-row:last-child{border-bottom:0}
.c660-answer-label{font-size:10px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--c660-muted);margin-bottom:3px}
.c660-answer-value{font-size:14px;color:var(--c660-ink)}
.c660-answer-value b{color:var(--c660-navy)}
.c660-trust{margin-top:38px;border-top:1px solid rgba(255,255,255,.09);display:grid;grid-template-columns:repeat(4,1fr)}
.c660-trust div{padding:15px 18px;border-right:1px solid rgba(255,255,255,.08);font-size:12px;color:#aebdca}
.c660-trust div:last-child{border-right:0}

/* TOC */
.c660-toc{background:#fff;border:1px solid rgba(15,35,64,.1);border-left:3px solid var(--c660-gold);border-radius:0 var(--c660-radius) var(--c660-radius) 0;padding:20px 22px}
.c660-toc summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:800;color:var(--c660-navy);font-size:13px;text-transform:uppercase;letter-spacing:.08em}
.c660-toc summary::-webkit-details-marker{display:none}
.c660-toc ol{display:grid;grid-template-columns:1fr 1fr;gap:8px 28px;margin:16px 0 0;padding-left:22px}
.c660-toc a{font-size:14px;text-decoration:none;color:var(--c660-ink)}
.c660-toc a:hover{color:#9b7a24}

/* CONTENT */
.c660-two{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.c660-copy{font-size:15px}
.c660-card{background:#fff;border:1px solid rgba(15,35,64,.09);border-radius:var(--c660-radius);padding:24px;box-shadow:var(--c660-shadow)}
.c660-card h3{font-size:21px;margin-bottom:12px}
.c660-formula{margin-top:18px;padding:20px;border-radius:10px;background:var(--c660-navy);color:#fff}
.c660-formula-line{font-family:'DM Sans',Arial,sans-serif;font-weight:700;font-size:15px;line-height:1.65}
.c660-formula-line span{color:var(--c660-gold)}
.c660-mini{font-size:12px;color:#aebdca;margin-top:8px}
.c660-note{margin:20px 0 0;padding:16px 18px;border-left:3px solid var(--c660-gold);background:var(--c660-gold-soft);border-radius:0 8px 8px 0;font-size:14px}
.c660-note--red{border-color:var(--c660-red);background:var(--c660-red-bg)}
.c660-note--green{border-color:var(--c660-green);background:var(--c660-green-bg)}
.c660-note--blue{border-color:#3277aa;background:var(--c660-blue-bg)}
.c660-kicker{font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:#8e742a;margin-bottom:5px}

/* TABLES */
.c660-table-wrap{margin-top:24px;border:1px solid rgba(15,35,64,.1);border-radius:10px;overflow-x:auto;background:#fff;-webkit-overflow-scrolling:touch}
.c660-table{width:100%;border-collapse:collapse;min-width:650px;font-size:14px}
.c660-table th{background:var(--c660-navy);color:#e4cc78;text-align:left;padding:12px 15px;font-size:11px;text-transform:uppercase;letter-spacing:.07em;white-space:nowrap}
.c660-table td{padding:12px 15px;border-bottom:1px solid #e8edf1;vertical-align:top}
.c660-table tr:last-child td{border-bottom:0}
.c660-table tr:nth-child(even) td{background:#faf9f6}
.c660-table .c660-hi td{background:#f4ecd3;font-weight:700;color:var(--c660-navy)}
.c660-table .c660-good{color:var(--c660-green);font-weight:800}
.c660-table .c660-bad{color:var(--c660-red);font-weight:800}

/* CALCULATOR */
.c660-calc-grid{display:grid;grid-template-columns:390px minmax(0,1fr);gap:26px;margin-top:30px}
.c660-calc-panel{background:#fff;border-radius:var(--c660-radius);padding:24px;border:1px solid rgba(15,35,64,.1);box-shadow:var(--c660-shadow)}
.c660-field{margin-bottom:16px}
.c660-field label{display:block;font-size:12px;font-weight:800;color:var(--c660-navy);margin-bottom:6px}
.c660-field input,.c660-field select{width:100%;padding:12px 13px;border:1px solid #cfd8e1;border-radius:7px;background:#fff;color:var(--c660-navy);font-size:16px;font-family:inherit}
.c660-field input:focus,.c660-field select:focus{outline:3px solid rgba(201,168,76,.18);border-color:var(--c660-gold)}
.c660-calc-help{font-size:11px;color:var(--c660-muted);margin-top:4px}
.c660-result{background:var(--c660-navy);border-radius:var(--c660-radius);padding:26px;color:#dce5ed;display:flex;flex-direction:column;justify-content:center}
.c660-result h3{color:#fff;font-size:23px;margin-bottom:20px}
.c660-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.c660-result-item{padding:14px;background:rgba(255,255,255,.055);border:1px solid rgba(201,168,76,.13);border-radius:8px}
.c660-result-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#9fb0bf;margin-bottom:3px}
.c660-result-value{font-size:19px;font-weight:800;color:#fff}
.c660-result-value--gold{color:var(--c660-gold)}
.c660-result-note{font-size:12px;color:#aebdca;margin-top:16px}

/* STEPS / ERRORS */
.c660-steps{display:grid;gap:2px;background:var(--c660-gold-line);border-radius:var(--c660-radius);overflow:hidden;margin-top:28px}
.c660-step{background:#fff;padding:22px;display:grid;grid-template-columns:42px 1fr;gap:16px}
.c660-step-num{width:38px;height:38px;border-radius:50%;background:var(--c660-navy);border:2px solid var(--c660-gold);color:var(--c660-gold);display:flex;align-items:center;justify-content:center;font-weight:800}
.c660-step h3{font-family:'DM Sans',Arial,sans-serif;font-size:15px;margin-bottom:5px}
.c660-step p{font-size:13.5px;margin:0}
.c660-error-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:28px}
.c660-error{background:var(--c660-navy-2);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:22px}
.c660-error-num{font-size:11px;font-weight:800;letter-spacing:.08em;color:var(--c660-gold);text-transform:uppercase}
.c660-error h3{font-family:'DM Sans',Arial,sans-serif;font-size:15px;color:#fff;margin:8px 0}
.c660-error p{font-size:13.5px;color:#c6d1dc;margin:0}
.c660-error a{color:var(--c660-gold)!important;text-decoration:underline;text-decoration-color:rgba(201,168,76,.55);text-underline-offset:3px}

/* COMPARE / FAQ / CTA */
.c660-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}
.c660-compare-card{background:#fff;border:1px solid rgba(15,35,64,.1);border-radius:10px;padding:22px}
.c660-code{font-size:11px;color:#9a7c27;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
.c660-compare-card h3{font-size:21px;margin:7px 0 10px}
.c660-faq{margin-top:26px;display:grid;gap:3px;border-radius:var(--c660-radius);overflow:hidden;background:var(--c660-gold-line)}
.c660-faq details{background:var(--c660-navy-2)}
.c660-faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:14px;padding:19px 22px;color:#fff;font-weight:700;font-size:14px}
.c660-faq summary::-webkit-details-marker{display:none}
.c660-faq summary:after{content:'+';color:var(--c660-gold);font-size:20px;font-weight:400}
.c660-faq details[open] summary:after{content:'–'}
.c660-faq-answer{padding:0 22px 20px;color:#d1dbe4;font-size:14px}
.c660-faq-answer a{color:#e6cd78}
.c660-source-box{margin-top:28px;padding:20px;background:#fff;border:1px solid rgba(15,35,64,.1);border-radius:10px;font-size:13px}
.c660-source-box a{color:#315f8b;text-decoration:underline;text-underline-offset:2px}
.c660-table a{color:inherit!important;text-decoration:underline;text-decoration-color:rgba(201,168,76,.7);text-underline-offset:3px}
.c660-cta{background:linear-gradient(135deg,var(--c660-navy),#193a5c);border-radius:14px;padding:36px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;box-shadow:var(--c660-shadow)}
.c660-cta h2{color:#fff;font-size:clamp(24px,3vw,34px)}
.c660-cta h2 em{font-style:normal;color:var(--c660-gold)}
.c660-cta p{color:#cbd6df;margin:10px 0 0;max-width:720px}
.c660-related{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:26px}
.c660-related span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--c660-muted);font-weight:800}
.c660-related a{display:inline-flex;padding:7px 12px;background:#fff;border:1px solid rgba(15,35,64,.1);border-radius:999px;text-decoration:none;font-size:12.5px;color:var(--c660-navy)}
.c660-related a:hover{border-color:var(--c660-gold)}

@media(max-width:980px){
  
  .c660-answer{max-width:720px}
  .c660-trust{grid-template-columns:1fr 1fr}
  .c660-cta{grid-template-columns:1fr}
}
@media(max-width:700px){
  .c660-wrap{padding:0 16px}
  .c660-section{padding:48px 0}
  .c660-hero{padding-top:38px}
  .c660-hero h1{font-size:30px}
  .c660-toc ol{grid-template-columns:1fr}
  .c660-result-grid,.c660-error-grid,.c660-compare{grid-template-columns:1fr}
  .c660-trust{grid-template-columns:1fr}
  .c660-trust div{border-right:0;border-bottom:1px solid rgba(255,255,255,.08)}
  .c660-btns{flex-direction:column;align-items:stretch}
  .c660-btn{width:100%}
  .c660-cta{padding:26px 20px}
  .c660-table{min-width:580px}
}
@media(max-width:460px){
  .c660-wrap{padding:0 13px}
  .c660-section{padding:38px 0}
  .c660-hero h1{font-size:20px}
  .c660-title{font-size:26px}
  .c660-card,.c660-calc-panel,.c660-result{padding:19px}
  .c660-step{grid-template-columns:36px 1fr;padding:18px 15px;gap:11px}
  .c660-step-num{width:33px;height:33px}
}
@media(prefers-reduced-motion:reduce){.c660-page *{scroll-behavior:auto!important;transition:none!important}}


/* ── CONTRASTE SUR FONDS SOMBRES — CORRECTION FINALE ── */
/* Le style global des <strong> est bleu marine. Sur les blocs navy, il doit être clair. */
.c660-hero-intro strong,
.c660-hero-list strong,
.c660-formula strong,
.c660-formula b,
.c660-result strong,
.c660-result b,
.c660-error strong,
.c660-error b,
.c660-faq-answer strong,
.c660-faq-answer b,
.c660-cta strong,
.c660-cta b{
  color:#fff !important;
}

/* Texte courant plus lisible sur navy / navy-mid. */
.c660-section--dark{color:#eef3f7}
.c660-section--dark .c660-lead{color:#d7e1ea}
.c660-section--dark .c660-error p{color:#dbe4ec}
.c660-section--dark .c660-faq-answer{color:#e0e8ef}
.c660-formula{color:#f4f7fa}
.c660-result{color:#e8eef4}
.c660-cta p{color:#e0e8ef}

/* Le bloc Sources reste blanc : son texte doit donc rester foncé. */
.c660-section--dark .c660-source-box{
  color:var(--c660-ink);
}
.c660-section--dark .c660-source-box strong{
  color:var(--c660-navy) !important;
}
.c660-section--dark .c660-source-box a{
  color:#245b8d;
  font-weight:600;
}

/* ── CALCULATEUR — LISIBILITÉ ET ALIGNEMENT DES CHAMPS ── */
.c660-page .c660-field label{
  color:#0F2340!important;
  -webkit-text-fill-color:#0F2340!important;
  font-size:14px!important;
  line-height:1.4!important;
  margin-bottom:8px!important;
}
.c660-page .c660-field input,
.c660-page .c660-field select{
  display:block!important;
  width:100%!important;
  height:58px!important;
  min-height:58px!important;
  padding:0 18px!important;
  color:#0F2340!important;
  -webkit-text-fill-color:#0F2340!important;
  background:#fff!important;
  font-size:17px!important;
  font-weight:500!important;
  line-height:normal!important;
  opacity:1!important;
}
.c660-page .c660-field select{
  padding-right:46px!important;
}
.c660-page .c660-field option{
  color:#0F2340!important;
  background:#fff!important;
}
.c660-page .c660-calc-help{
  color:#50667B!important;
  -webkit-text-fill-color:#50667B!important;
  font-size:13px!important;
  line-height:1.55!important;
  margin-top:7px!important;
}
.c660-page .c660-result{
  padding:38px!important;
  color:#F1F5F8!important;
  -webkit-text-fill-color:#F1F5F8!important;
}
.c660-page .c660-result h3{
  color:#fff!important;
  -webkit-text-fill-color:#fff!important;
  font-size:27px!important;
  line-height:1.25!important;
  margin-bottom:24px!important;
}
.c660-page .c660-result-item{
  background:#203B5D!important;
  border-color:rgba(226,201,122,.22)!important;
  padding:17px 20px!important;
}
.c660-page .c660-result-label{
  color:#C2D4E3!important;
  -webkit-text-fill-color:#C2D4E3!important;
  font-size:12px!important;
  font-weight:600!important;
  line-height:1.4!important;
  margin-bottom:7px!important;
}
.c660-page .c660-result-value{
  color:#fff!important;
  -webkit-text-fill-color:#fff!important;
  font-size:24px!important;
  line-height:1.2!important;
}
.c660-page .c660-result-value--gold{
  color:#E4BD4F!important;
  -webkit-text-fill-color:#E4BD4F!important;
}
.c660-page .c660-result-note{
  color:#E0E8EF!important;
  -webkit-text-fill-color:#E0E8EF!important;
  font-size:14px!important;
  line-height:1.65!important;
  margin-top:22px!important;
}
@media(max-width:640px){
  .c660-page .c660-result{padding:22px!important}
  .c660-page .c660-result-grid{grid-template-columns:1fr!important}
}

/* Liens utilisables et visibles dans les zones sombres. */
.c660-section--dark .c660-faq-answer a,
.c660-cta a:not(.c660-btn--gold){
  color:#f0d783;
}