/* testdebit.org — feuille de style unique. Polices système : aucune requête externe. */
:root{--bg:#F2F5F4;--panel:#FFFFFF;--ink:#14262B;--muted:#4A5D61;--line:#CDD9D7;--link:#0B6B6F;--accent:#E0A100;--serif:Charter,"Bitstream Charter","Sitka Text",Cambria,Georgia,serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0E1A1D;--panel:#14252A;--ink:#E3ECEA;--muted:#9DB1AE;--line:#2A4245;--link:#7FD3CD;--accent:#F2B705}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:1.0625rem/1.65 var(--sans)}
a{color:var(--link);text-underline-offset:.15em}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
h1,h2,h3{font-family:var(--serif);line-height:1.2;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
h1{font-size:clamp(2rem,4.6vw,3.05rem);margin:.15em 0 .4em;max-width:24ch}
h2{font-size:clamp(1.45rem,2.6vw,1.95rem);margin:2.1em 0 .6em}
h3{font-size:1.2rem;margin:1.6em 0 .4em}
p,ul,ol,dl{margin:0 0 1em}
li{margin:.3em 0}
strong{font-weight:650}
.wrap{max-width:72rem;margin:0 auto;padding:0 1.25rem}
.prose>*{max-width:44rem}
.prose>.table-wrap,.prose>.links{max-width:none}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:.5rem;background:var(--panel);padding:.5rem 1rem;z-index:9}
.skip:focus{left:1rem}

/* En-tête */
.site-head{border-bottom:1px solid var(--line)}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:.25rem 1.5rem;min-height:3.75rem;flex-wrap:wrap}
.logo{font:700 1.3rem var(--serif);color:var(--ink);text-decoration:none;padding:.5rem 0}
.logo span{color:var(--muted);font-weight:400}
.nav{overflow-x:auto;max-width:100%}
.nav ul{display:flex;gap:1.1rem;list-style:none;margin:0;padding:0}
.nav li{margin:0}
.nav a{display:block;padding:.6rem 0;color:var(--ink);text-decoration:none;font-size:.95rem;white-space:nowrap}
.nav a:hover,.nav a[aria-current]{box-shadow:inset 0 -3px var(--accent)}

/* Fil d'Ariane, introduction */
.crumbs{font-size:.88rem;color:var(--muted);padding-top:1.1rem}
.crumbs ol{display:flex;flex-wrap:wrap;gap:.4rem;list-style:none;margin:0;padding:0}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:.4rem;color:var(--line)}
.crumbs a{color:var(--muted)}
.hero{padding-top:1.75rem;padding-bottom:1.5rem}
.lede{font-size:1.18rem;color:var(--muted);max-width:42rem;margin:0}
.meta{font-size:.88rem;color:var(--muted);margin:.9rem 0 0}
.hero .btn{margin-top:1.25rem}

/* Outil de mesure */
.tool-in{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);background:var(--panel);border:1px solid var(--line);border-radius:6px}
.gauge,.res{padding:1.5rem 1.75rem}
.gauge{border-right:1px solid var(--line)}
.steps{display:flex;flex-wrap:wrap;gap:.25rem 1.25rem;list-style:none;padding:0;margin:0;font-size:.9rem;color:var(--muted);counter-reset:s}
.steps li{margin:0}
.steps li::before{counter-increment:s;content:counter(s) ". "}
.steps .is-active{color:var(--ink);font-weight:650}
.steps .is-done{color:var(--link)}
.readout{font:600 clamp(3.4rem,11vw,5.6rem)/1 var(--sans);font-variant-numeric:tabular-nums;letter-spacing:-.03em;margin:.3em 0 .3em}
.unit{font-size:.26em;font-weight:500;letter-spacing:0;color:var(--muted);margin-left:.45em}
.bars{display:flex;align-items:flex-end;gap:3px;height:64px}
.bars i{flex:1;height:calc(16% + var(--i) * 2.8%);background:var(--line);border-radius:1px;transition:background-color .12s}
.bars i.on{background:var(--accent)}
.scale{display:flex;justify-content:space-between;font-size:.75rem;color:var(--muted);font-variant-numeric:tabular-nums;margin:.35rem 0 1.4rem}
.btn{display:inline-block;min-height:44px;padding:.8rem 1.6rem;border:0;border-radius:4px;background:var(--ink);color:var(--bg);font:600 1.05rem var(--sans);text-decoration:none;cursor:pointer}
.btn:hover{background:var(--link);color:var(--bg)}
.btn:disabled{opacity:.65;cursor:progress}
.note{font-size:.85rem;color:var(--muted);margin:.9rem 0 0}
.metrics{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem 1.5rem;margin:0 0 1.25rem}
.metrics div{border-top:3px solid var(--line);padding-top:.5rem}
.metrics dt{font-size:.88rem;color:var(--muted)}
.metrics dd{margin:0;font:600 1.9rem/1.2 var(--sans);font-variant-numeric:tabular-nums}
.metrics small{font-size:.48em;font-weight:500;color:var(--muted);margin-left:.3em}
.info{min-height:8.5em;font-size:.95rem;margin:0}
.hist{font-size:.9rem;border-top:1px solid var(--line);padding-top:.6rem}
.hist summary{cursor:pointer;color:var(--link);padding:.3rem 0}
.hist table{margin-top:.5rem;font-size:.88rem}

/* Contenu */
.table-wrap{overflow-x:auto;margin:0 0 1.5rem}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
caption{text-align:left;font-size:.9rem;color:var(--muted);padding-bottom:.4rem}
th,td{text-align:left;vertical-align:top;padding:.55rem .9rem .55rem 0;border-bottom:1px solid var(--line)}
thead th{border-bottom:2px solid var(--ink);font-weight:650}
.toc{border:1px solid var(--line);border-radius:6px;background:var(--panel);padding:1rem 1.25rem;font-size:.95rem;margin-top:1rem}
.toc p{font-weight:650;margin:0 0 .3rem}
.toc ol{margin:0;padding-left:1.25rem}
.links{display:grid;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr));gap:1.25rem 1.5rem;list-style:none;padding:0}
.links li{margin:0;border-top:3px solid var(--ink);padding-top:.6rem}
.links a{font:700 1.1rem var(--serif)}
.links p{margin:.3rem 0 0;font-size:.95rem;color:var(--muted)}
.cta{background:var(--panel);border-left:4px solid var(--accent);padding:.9rem 1.2rem}
.faq details{border-bottom:1px solid var(--line);padding:.7rem 0}
.faq summary{cursor:pointer;font:700 1.08rem/1.4 var(--serif)}
.faq details p{margin:.6rem 0 .2rem}

/* Pied de page */
.site-foot{border-top:1px solid var(--line);margin-top:4.5rem;padding:2.5rem 0 3rem;font-size:.92rem}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));gap:1.5rem}
.fh{font-weight:650;margin:0 0 .5rem}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin:0}
.site-foot li a{display:inline-block;padding:.22rem 0;color:var(--ink)}
.legal{color:var(--muted);margin:2rem 0 0}

@media (max-width:760px){
.tool-in{grid-template-columns:1fr}
.gauge{border-right:0;border-bottom:1px solid var(--line)}
.gauge,.res{padding:1.25rem}
.head-in{padding-top:.25rem}
.nav{width:100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}