/* ==========================================================================
   cheques-vacances-bnc.fr — Design system "moderne & premium" (charte BNC)
   ========================================================================== */

:root{
  /* Palette — Chèques-Vacances BNC (navy + rouge) */
  --ink:#18283E;           /* texte principal */
  --ink-soft:#3a4759;      /* texte secondaire */
  --muted:#516178;         /* texte discret */
  --muted-2:#8a9bb0;       /* discret sur navy / labels */
  --line:#dbe3ec;          /* bordures */
  --bg:#ffffff;
  --bg-soft:#F3F6FA;       /* fonds de sections */
  --bg-tint:#eaf0f6;

  --green:#0E2F5A;         /* navy primaire (conservé sous le nom --green pour compat) */
  --green-deep:#0A2142;    /* navy foncé (bandeau, footer) */
  --green-600:#15437a;     /* liens */
  --green-glow:rgba(10,33,66,.10);

  --coral:#C52B42;         /* rouge d accent */
  --coral-2:#d8384f;       /* hover / dégradé bouton */
  --amber:#C52B42;

  --radius:14px;
  --radius-sm:9px;
  --radius-lg:22px;
  --shadow-sm:0 1px 2px rgba(10,33,66,.06), 0 2px 8px rgba(10,33,66,.05);
  --shadow:0 6px 24px rgba(10,33,66,.09);
  --shadow-lg:0 20px 60px rgba(10,33,66,.14);
  --maxw:1120px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --display:"Noto Serif","Georgia",serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--green-600);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);line-height:1.15;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem)}
h2{font-size:clamp(1.6rem,3vw,2.25rem);margin-top:0}
h3{font-size:1.28rem}
p{margin:0 0 1.05em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:800px}

/* ---------- Boutons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-weight:600;font-size:1rem;
  padding:.85em 1.5em;border-radius:999px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .2s ease;text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 8px 22px rgba(197,43,66,.28)}
.btn-primary:hover{background:var(--coral-2);box-shadow:0 12px 30px rgba(197,43,66,.38)}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-deep)}
.btn-ghost{background:transparent;color:var(--green);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--green);background:var(--bg-soft)}
.btn-white{background:#fff;color:var(--green-deep)}
.btn-outline-white{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline-white:hover{background:rgba(255,255,255,.12)}

/* ---------- Bandeau promo ---------- */
#promo-banner{position:sticky;top:0;z-index:60}
.promo{background:linear-gradient(90deg,var(--green-deep),var(--green));color:#fff}
.promo-inner{max-width:var(--maxw);margin:0 auto;padding:10px 24px;
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center}
.promo-text{font-size:.98rem;font-weight:500;margin:0;text-align:center}
.promo-text strong{font-weight:700;color:#ffffff}
.promo-actions{display:flex;gap:10px;flex-shrink:0}
.promo .btn{padding:.5em 1.1em;font-size:.9rem}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
#promo-banner + .site-header{top:0}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;
  font-size:1.15rem;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand-mark{width:40px;height:40px;border-radius:9px;
  background:url("/assets/brand-icon.svg?v=4") center/contain no-repeat;
  box-shadow:var(--shadow-sm);font-size:0;color:transparent;flex:none}
.brand small{display:block;font-family:var(--font);font-size:.66rem;color:var(--muted);font-weight:500;letter-spacing:.02em}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--ink-soft);font-weight:500;font-size:.97rem}
.nav a:hover{color:var(--green);text-decoration:none}
.nav .btn{color:#fff}
.menu-toggle{display:none;background:none;border:0;font-size:1.6rem;color:var(--ink);cursor:pointer}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1000px 500px at 85% -10%,var(--bg-tint),transparent 60%),
  radial-gradient(700px 400px at 0% 100%,#eef3fb,transparent 55%),var(--bg)}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;
  padding:72px 0 76px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--green-glow);
  color:var(--green);font-weight:600;font-size:.82rem;padding:.4em 1em;border-radius:999px;
  text-transform:uppercase;letter-spacing:.06em;margin-bottom:22px}
.hero h1{margin:0 0 20px}
.hero .lead{font-size:1.18rem;color:var(--ink-soft);max-width:38ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-trust{margin-top:26px;font-size:.9rem;color:var(--muted);display:flex;gap:20px;flex-wrap:wrap}
.hero-trust b{color:var(--ink)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:28px}
.hero-card h3{margin:0 0 6px;font-family:var(--font);font-size:1.05rem}
.hero-card .price{font-family:var(--display);font-size:2.6rem;color:var(--green);font-weight:700}
.hero-card ul{list-style:none;margin:18px 0 0;padding:0}
.hero-card li{display:flex;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-size:.96rem;color:var(--ink-soft)}
.hero-card li::before{content:"\2713";color:var(--coral);font-weight:800}

/* ---------- Sections ---------- */
section{padding:64px 0}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:640px;margin:0 auto 44px;text-align:center}
.section-head .eyebrow{margin-bottom:14px}
.section-head p{color:var(--ink-soft);font-size:1.08rem;margin:0}

/* ---------- Silos grid ---------- */
.silo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.silo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease;
  display:flex;flex-direction:column}
.silo-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);text-decoration:none}
.silo-ic{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;font-size:1.5rem;
  background:var(--bg-tint);margin-bottom:16px}
.silo-card h3{margin:0 0 8px;font-family:var(--font);font-size:1.16rem}
.silo-card p{color:var(--ink-soft);font-size:.96rem;margin:0 0 16px;flex:1}
.silo-card .more{color:var(--green);font-weight:600;font-size:.92rem}
.silo-card.feat{background:linear-gradient(160deg,var(--green-deep),var(--green));color:#fff;border:0}
.silo-card.feat h3,.silo-card.feat p{color:#fff}
.silo-card.feat .silo-ic{background:rgba(255,255,255,.14)}
.silo-card.feat .more{color:#ffb3bf}
.tag{display:inline-block;background:var(--coral);color:#fff;font-size:.68rem;font-weight:700;
  padding:.25em .7em;border-radius:999px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:14px;align-self:flex-start}

/* ---------- Feature / band ---------- */
.band{background:var(--bg-tint);border-radius:var(--radius-lg);padding:44px;display:grid;
  grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:20px;margin-top:8px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center}
.stat .n{font-family:var(--display);font-size:2rem;color:var(--green);font-weight:700}
.stat .l{font-size:.85rem;color:var(--muted)}

/* ---------- Article ---------- */
.breadcrumb{font-size:.85rem;color:var(--muted);padding:20px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--green)}
.article-head{padding:26px 0 8px}
.article-head h1{margin:.2em 0 .3em}
.article-meta{color:var(--muted);font-size:.9rem}
.article-layout{display:grid;grid-template-columns:1fr 280px;gap:52px;align-items:start;padding-bottom:40px}
.prose{max-width:none}
.prose h2{margin:1.7em 0 .6em;padding-top:.3em;scroll-margin-top:120px}
.prose h3{margin:1.5em 0 .4em;scroll-margin-top:120px}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin:.4em 0}
.prose>p:first-of-type{font-size:1.13rem;color:var(--ink-soft)}
.callout{background:var(--bg-soft);border-left:4px solid var(--green);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:18px 22px;margin:1.6em 0}
.callout.coral{border-color:var(--coral);background:#fdeff1}
.callout strong{color:var(--ink)}
.data-table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.95rem;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.data-table th{background:var(--green-deep);color:#fff;text-align:left;padding:12px 16px;font-family:var(--font);font-weight:600;font-size:.9rem}
.data-table td{padding:11px 16px;border-top:1px solid var(--line)}
.data-table tr:nth-child(even) td{background:var(--bg-soft)}
.article-layout aside{position:sticky;top:120px;align-self:start;max-height:calc(100vh - 140px);overflow:auto}
.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.toc h4{margin:0 0 12px;font-family:var(--font);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin:0}
.toc a{display:block;padding:6px 0;font-size:.92rem;color:var(--ink-soft);border-left:2px solid transparent;padding-left:12px;margin-left:-12px}
.toc a:hover{color:var(--green);border-color:var(--green);text-decoration:none}
.cta-box{background:linear-gradient(160deg,var(--green-deep),var(--green));color:#fff;border-radius:var(--radius);padding:26px;margin-top:22px}
.cta-box h4{color:#fff;margin:0 0 8px;font-family:var(--font)}
.cta-box p{font-size:.92rem;color:rgba(255,255,255,.85);margin:0 0 16px}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:700;font-family:var(--display);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--green);font-weight:400;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .faq-body{padding:16px 22px 20px;color:var(--ink-soft)}

/* ---------- Related links ---------- */
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.related a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;color:var(--ink);font-weight:500;box-shadow:var(--shadow-sm)}
.related a:hover{border-color:var(--green);text-decoration:none;transform:translateY(-2px);transition:.15s}
.related a span{display:block;font-size:.82rem;color:var(--muted);font-weight:400;margin-top:2px}

/* ---------- Final CTA ---------- */
.cta-final{background:linear-gradient(135deg,var(--green-deep),var(--green));color:#fff;text-align:center}
.cta-final h2{color:#fff}
.cta-final p{color:rgba(255,255,255,.85);max-width:520px;margin:0 auto 26px;font-size:1.08rem}

/* ---------- Footer ---------- */
.site-footer{background:var(--green-deep);color:rgba(255,255,255,.72);padding:56px 0 30px;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:36px;margin-bottom:36px}
.site-footer h5{color:#fff;font-family:var(--font);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 14px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:8px 0}
.site-footer a{color:rgba(255,255,255,.72)}
.site-footer a:hover{color:#fff;text-decoration:none}
.footer-brand p{max-width:34ch;font-size:.9rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.82rem;color:rgba(255,255,255,.5)}
.disclaimer{background:var(--green-deep);color:rgba(255,255,255,.45);font-size:.78rem;text-align:center;padding:0 0 20px}
.disclaimer .container{border-top:1px solid rgba(255,255,255,.1);padding-top:18px}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:48px 0}
  .hero-card{order:-1}
  .article-layout{grid-template-columns:1fr}
  .toc{display:none}.article-layout aside{position:static;max-height:none;overflow:visible}
  .band{grid-template-columns:1fr;padding:30px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;background:#fff;padding:20px 24px;border-bottom:1px solid var(--line);gap:16px}
  .menu-toggle{display:block}
}
@media(max-width:560px){
  .promo-inner{flex-direction:column;gap:8px;text-align:center}
  .footer-grid{grid-template-columns:1fr}
  body{font-size:16px}
}

/* ===== Optimisation mobile (append) ===== */
html{-webkit-text-size-adjust:100%}
img,table,pre,iframe{max-width:100%}
@media(max-width:820px){
  .article-layout{grid-template-columns:1fr;gap:0}
  .toc{display:none}.article-layout aside{position:static;max-height:none;overflow:visible}
  .data-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .data-table th,.data-table td{padding:9px 11px;font-size:.9rem}
}
@media(max-width:560px){
  .container{padding:0 18px}
  section{padding:40px 0}
  .hero-inner{padding:34px 0}
  h1,.article-head h1{font-size:1.72rem;line-height:1.22}
  h2{font-size:1.38rem}
  h3{font-size:1.14rem}
  .hero .lead{font-size:1.05rem}
  .prose{font-size:1rem}
  .prose>p:first-of-type{font-size:1.05rem}
  .hero-card,.cta-box,.callout,.band,.silo-card,.cvb-conviction,.cvb-inline-cta{padding:18px !important}
  .hero-cta{width:100%}
  .hero-cta .btn,.cta-final .btn,.hero-card .btn,.cta-box .btn{width:100%;justify-content:center}
  .data-table{font-size:.84rem}
  .data-table th,.data-table td{padding:8px 9px}
  .faq summary{padding:14px 16px;font-size:.98rem}
  .faq .faq-body{padding:14px 16px}
  .related{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px;text-align:center}
  .brand small{display:none}
  .cvb-inline-cta,.cvb-conviction{flex-direction:column}
}

/* ===== Bandeau promo : optimisation mobile ===== */
@media(max-width:640px){
  .promo-inner{flex-direction:column;align-items:stretch;gap:7px;padding:8px 14px}
  .promo-text{font-size:.8rem;line-height:1.3;text-align:left;margin:0}
  .promo-flag{font-size:.55rem !important;padding:1px 6px !important;margin-right:5px !important}
  .promo-deadline{display:none !important}
  .promo-countdown{display:none !important}
  .promo-actions .btn-outline-white{display:none !important}
  .promo-actions{width:100%;gap:6px !important}
  .promo .btn{width:100%;justify-content:center;padding:.5em .6em !important;font-size:.82rem;line-height:1.15}
}