/* geolinkaavis.com - comparatif analytique : acier, gris clair, sarcelle */
:root{
  --steel:#132F42;
  --steel-2:#1D435C;
  --bg:#EEF2F5;
  --card:#FFFFFF;
  --line:#D3DDE5;
  --teal:#12908E;
  --teal-deep:#0B6E6C;
  --amber:#B4741B;
  --text:#1B2B36;
  --muted:#5A6C7A;
  --maxw:800px;
  --wide:1200px;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:108px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:17.5px;line-height:1.7}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal-deep);text-underline-offset:2px}
a:hover{color:var(--steel)}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
h1,h2,h3,h4{font-family:"Space Grotesk","IBM Plex Sans",sans-serif;color:var(--steel);line-height:1.16;font-weight:600;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3.3rem);margin:0 0 .5em}
h2{font-size:clamp(1.5rem,3.3vw,2.1rem);margin:0 0 .5em}
h3{font-size:clamp(1.1rem,2.1vw,1.3rem);margin:2em 0 .4em}
p{margin:0 0 1.15em}
strong{font-weight:600;color:var(--steel)}
.skip{position:absolute;left:-9999px}
.skip:focus{position:fixed;left:1rem;top:1rem;background:var(--steel);color:#fff;padding:.8rem 1.2rem;z-index:300}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.wide{max-width:var(--wide)}
.mono{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal-deep)}

/* en-tete */
.topbar{position:sticky;top:0;z-index:100;background:var(--steel);color:#fff}
.topbar-in{max-width:var(--wide);margin:0 auto;padding:.65rem 22px;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;gap:.6rem;align-items:center;text-decoration:none;color:#fff}
.brand img{width:30px;height:30px}
.brand b{font-family:"Space Grotesk",sans-serif;font-size:1rem;display:block;line-height:1.15}
.brand small{font-family:var(--mono);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:#8FB6C3}
.topbar .btn{padding:.5rem 1rem;font-size:.83rem}
.subnav{position:sticky;top:52px;z-index:95;background:rgba(238,242,245,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.subnav ul{max-width:var(--wide);margin:0 auto;padding:.5rem 22px;display:flex;gap:.5rem;list-style:none;overflow-x:auto;scrollbar-width:thin}
.subnav a{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;text-decoration:none;
  color:var(--muted);border:1px solid var(--line);background:var(--card);padding:.4rem .75rem;white-space:nowrap}
.subnav a:hover,.subnav a[aria-current="true"]{color:#fff;background:var(--teal-deep);border-color:var(--teal-deep)}
@media(max-width:700px){.subnav{display:none}html{scroll-padding-top:64px}}

/* boutons */
.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--teal);color:#fff;border:0;
  padding:.95rem 1.7rem;font-weight:600;font-size:.98rem;text-decoration:none;transition:background .16s ease,transform .16s ease}
.btn:hover{background:var(--steel);color:#fff;transform:translateY(-1px)}
.btn-steel{background:var(--steel)}
.btn-steel:hover{background:var(--teal-deep)}
.btn-line{background:transparent;color:var(--steel);box-shadow:inset 0 0 0 2px var(--steel)}
.btn-line:hover{background:var(--steel);color:#fff}

/* hero */
.hero{background:var(--steel);color:#D6E2EA;padding:clamp(2.6rem,6vw,4.4rem) 0}
.hero-in{max-width:var(--wide);margin:0 auto;padding:0 22px;display:grid;grid-template-columns:1.12fr .88fr;gap:3rem;align-items:center}
.hero h1{color:#fff}
.hero .lede{font-size:1.13rem;color:#AFC4D2;max-width:58ch}
.hero .mono{color:#5FC7C3}
.hero img{box-shadow:0 24px 60px rgba(0,0,0,.35)}
@media(max-width:920px){.hero-in{grid-template-columns:1fr;gap:2rem}}
.badges{display:flex;flex-wrap:wrap;gap:.5rem;margin:1.6rem 0}
.badge{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid rgba(255,255,255,.25);padding:.32rem .7rem;color:#BFD3DF}
.badge.on{background:var(--teal);border-color:var(--teal);color:#fff}

/* sommaire */
.toc{background:var(--card);border:1px solid var(--line);padding:1.6rem 1.8rem;margin:2.6rem 0}
.toc h2{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:.9rem}
.toc ol{margin:0;padding:0;list-style:none;counter-reset:t;columns:2;column-gap:2.2rem;font-size:.94rem}
.toc li{counter-increment:t;margin:.35rem 0;break-inside:avoid;padding-left:2.2rem;position:relative}
.toc li::before{content:counter(t,decimal-leading-zero);position:absolute;left:0;font-family:var(--mono);font-size:.72rem;color:var(--teal-deep)}
.toc a{color:var(--steel);text-decoration:none}
.toc a:hover{color:var(--teal-deep);text-decoration:underline}
@media(max-width:620px){.toc ol{columns:1}}

/* sections */
section{padding:2.6rem 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:0}
.sec-tag{display:inline-block;font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal-deep);border-left:3px solid var(--teal);padding-left:.6rem;margin-bottom:.9rem}

/* cartes */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.2rem;margin:1.8rem 0}
.card{background:var(--card);border:1px solid var(--line);padding:1.4rem;position:relative}
.card h3{margin:.2rem 0 .5rem;font-size:1.1rem}
.card p{font-size:.93rem;margin-bottom:.7rem}
.card .mono{display:block;margin-bottom:.2rem}
.card ul{margin:.6rem 0 0;padding-left:1.1rem;font-size:.9rem;color:var(--muted)}
.card.highlight{border-color:var(--teal);box-shadow:0 0 0 1px var(--teal)}
.verdict-chip{display:inline-block;font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;text-transform:uppercase;
  background:var(--bg);border:1px solid var(--line);padding:.25rem .55rem;margin-top:.7rem}
.chip-yes{background:rgba(18,144,142,.12);border-color:rgba(18,144,142,.5);color:var(--teal-deep)}
.chip-no{background:rgba(180,116,27,.12);border-color:rgba(180,116,27,.45);color:var(--amber)}

/* encadres */
.key{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--teal);padding:1.3rem 1.5rem;margin:1.8rem 0}
.key .t{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-deep);display:block;margin-bottom:.5rem}
.key p:last-child{margin-bottom:0}
.key-dark{background:var(--steel);border-color:var(--steel);color:#C9D8E2}
.key-dark .t{color:#5FC7C3}
.key-dark strong{color:#fff}
figure{margin:2.2rem 0}
figure img{border:1px solid var(--line)}
figcaption{font-size:.82rem;color:var(--muted);margin-top:.6rem;font-family:var(--mono);letter-spacing:.02em}

/* tableaux */
.table-wrap{overflow-x:auto;margin:1.8rem 0;background:var(--card);border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:640px}
caption{text-align:left;padding:.9rem 1rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line)}
th,td{padding:.8rem 1rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--steel);color:#fff;font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;font-weight:500}
tbody th{font-weight:600;color:var(--steel);background:rgba(211,221,229,.25)}
tbody tr:last-child td{border-bottom:0}
td.yes{color:var(--teal-deep);font-weight:600}
td.no{color:var(--amber)}
.scale{display:flex;gap:3px;align-items:center}
.scale i{width:11px;height:11px;background:var(--line);display:inline-block}
.scale i.on{background:var(--teal)}

/* arbre de decision */
.tree{margin:2rem 0;display:grid;gap:.9rem}
.tree-node{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--teal);padding:1.1rem 1.3rem}
.tree-node b{display:block;color:var(--steel);font-family:"Space Grotesk",sans-serif;margin-bottom:.2rem}
.tree-node span{font-size:.92rem;color:var(--muted)}

/* cta */
.cta-block{background:var(--steel);color:#C9D8E2;padding:2.2rem;margin:2.4rem 0;border-left:5px solid var(--teal)}
.cta-block h3{color:#fff;margin:0 0 .5rem}
.cta-block p{color:#A9C0CE;margin:0 0 1.3rem;max-width:56ch}
.cta-inline{margin:2rem 0}

/* faq */
.faq-item{background:var(--card);border:1px solid var(--line);margin-bottom:.6rem}
.faq-item summary{cursor:pointer;padding:1.05rem 2.6rem 1.05rem 1.2rem;font-family:"Space Grotesk",sans-serif;font-weight:500;color:var(--steel);position:relative;list-style:none;font-size:1.04rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"[+]";position:absolute;right:1rem;top:1.05rem;font-family:var(--mono);font-size:.8rem;color:var(--teal-deep)}
.faq-item[open] summary::after{content:"[-]"}
.faq-item .a{padding:0 1.2rem 1.2rem;font-size:.95rem;color:#35485a}
.faq-item .a p:last-child{margin-bottom:0}

/* auteur */
.author-box{display:flex;gap:1.4rem;background:var(--card);border:1px solid var(--line);padding:1.5rem;margin:2.4rem 0}
.author-box img{width:100px;height:100px;flex:0 0 auto}
.author-box h3{margin:0 0 .3rem;font-size:1.12rem}
.author-box p{font-size:.92rem;color:var(--muted)}
.author-links{display:flex;flex-wrap:wrap;gap:.9rem;font-size:.84rem}
@media(max-width:560px){.author-box{flex-direction:column}}
.disclosure{font-size:.85rem;color:var(--muted);border:1px dashed var(--line);background:var(--card);padding:1.1rem 1.3rem;margin:2rem 0}
.disclosure p:last-child{margin-bottom:0}

/* bouton fixe */
.fixed-cta{position:fixed;right:0;bottom:22px;z-index:98;transform:translateX(110%);transition:transform .3s ease}
.fixed-cta.show{transform:none}
.fixed-cta .btn{box-shadow:-6px 6px 22px rgba(19,47,66,.25)}
@media(max-width:560px){.fixed-cta{left:0;right:0;bottom:0}.fixed-cta .btn{width:100%;justify-content:center}}

/* pied de page */
footer.site{background:var(--steel);color:#9FB6C4;padding:3.2rem 0 2rem;font-size:.9rem}
footer.site .cols{max-width:var(--wide);margin:0 auto;padding:0 22px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2.4rem}
footer.site h4{color:#fff;font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;margin:0 0 1rem}
footer.site ul{list-style:none;margin:0;padding:0}
footer.site li{margin:.5rem 0;line-height:1.45}
footer.site a{color:#BDD0DC;text-decoration:none}
footer.site a:hover{color:#5FC7C3;text-decoration:underline}
footer.site .f-brand{display:flex;gap:.7rem;align-items:center;margin-bottom:.9rem}
footer.site .f-brand img{width:34px;height:34px}
footer.site .f-brand b{color:#fff;font-family:"Space Grotesk",sans-serif;font-size:1.08rem}
footer.site .legal{max-width:var(--wide);margin:2.6rem auto 0;padding:1.4rem 22px 0;border-top:1px solid rgba(255,255,255,.12);
  font-size:.8rem;color:#7C94A3;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between}
@media(max-width:880px){footer.site .cols{grid-template-columns:1fr 1fr}}
@media(max-width:520px){footer.site .cols{grid-template-columns:1fr}}

/* pages annexes */
.page-head{padding:2.8rem 0 1.6rem;border-bottom:1px solid var(--line)}
.breadcrumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.prose h2{margin-top:2.2rem}
.prose dl{margin:1.4rem 0}
.prose dt{font-weight:600;color:var(--steel);margin-top:1rem}
.prose dd{margin:.2rem 0 0}
.sitemap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.2rem;margin:2rem 0}
.sitemap-card{background:var(--card);border:1px solid var(--line);padding:1.2rem 1.3rem}
.sitemap-card h3{margin:0 0 .5rem;font-size:1.02rem}
.sitemap-card ul{margin:0;padding-left:1.1rem;font-size:.9rem}
.sitemap-card li{margin:.35rem 0}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}.reveal{opacity:1;transform:none}}

/* lisibilite des boutons dans le pied de page et l'en-tete */
footer.site a.btn{color:#fff}
footer.site a.btn:hover{color:#fff;background:var(--teal-deep)}
.topbar .btn{white-space:nowrap}
@media(max-width:420px){.topbar .btn{padding:.45rem .8rem;font-size:.78rem}.brand small{display:none}}