/* CharpenteEquerre.com — feuille de style
   Concept : une épure de charpentier. Fond quadrillé, angles droits, rouge minium des pièces
   métalliques, cotes en caractères machine ; colonne de repères à droite du texte. */
@font-face{font-family:"Barlow Condensed";src:url(fonts/barlow-condensed-latin-800-normal.woff2) format("woff2");font-weight:800;font-display:swap}
@font-face{font-family:"Barlow Condensed";src:url(fonts/barlow-condensed-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4-latin-400-italic.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(fonts/jetbrains-mono-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
  --zinc:#F4F5F7;        /* papier d'épure */
  --sheet:#FFFFFF;
  --ink:#172033;         /* bleu nuit */
  --muted:#586579;
  --rule:#D3D9E2;
  --timber:#B83D23;      /* rouge minium (accent) */
  --timber-soft:#F8E4DD;
  --steel:#2E5383;
  --steel-soft:#E3EAF4;
  --grid:rgba(46,83,131,.07);
  --display:"Barlow Condensed","Arial Narrow","Roboto Condensed",sans-serif;
  --body:"Source Serif 4",Georgia,"Times New Roman",serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --measure:66ch;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --zinc:#10151F;--sheet:#171E2B;--ink:#E8ECF2;--muted:#9AA8BA;--rule:#2A3446;
  --timber:#F07A5C;--timber-soft:#2E1C18;--steel:#8FB3E0;--steel-soft:#1A2436;--grid:rgba(143,179,224,.06);color-scheme:dark}}
:root[data-theme="dark"]{
  --zinc:#10151F;--sheet:#171E2B;--ink:#E8ECF2;--muted:#9AA8BA;--rule:#2A3446;
  --timber:#F07A5C;--timber-soft:#2E1C18;--steel:#8FB3E0;--steel-soft:#1A2436;--grid:rgba(143,179,224,.06);color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--zinc);color:var(--ink);font:400 1.0625rem/1.7 var(--body)}
img,svg{max-width:100%;height:auto}
a{color:var(--steel);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--timber)}
:focus-visible{outline:3px solid var(--timber);outline-offset:2px}
.wrap{max-width:1120px;margin-inline:auto;padding-inline:clamp(16px,4vw,32px)}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:var(--sheet);padding:8px 12px;z-index:9}

/* En-tête */
.site-head{background:var(--sheet);border-bottom:1px solid var(--rule)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;padding-block:14px}
.brand img{display:block;height:48px;width:auto}
.nav{display:flex;flex-wrap:wrap;gap:4px 20px;font:500 .8rem/1.4 var(--mono);letter-spacing:.04em;text-transform:uppercase}
.nav a{color:var(--ink);text-decoration:none;padding-block:4px;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current]{border-bottom-color:var(--timber);color:var(--ink)}
.brand .logo-dark{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .brand .logo-light{display:none}:root:not([data-theme="light"]) .brand .logo-dark{display:block}}
:root[data-theme="dark"] .brand .logo-light{display:none}:root[data-theme="dark"] .brand .logo-dark{display:block}

.disclosure-bar{background:var(--timber-soft);color:var(--ink);font:400 .78rem/1.5 var(--mono)}
.disclosure-bar .wrap{padding-block:7px}

/* Typo */
h1,h2,h3{font-family:var(--display);line-height:1.02;text-wrap:balance;margin:0}
h1{font-weight:800;font-size:clamp(2.6rem,6vw,4.4rem);letter-spacing:-.005em}
h2{font-weight:800;font-size:clamp(1.8rem,3.4vw,2.35rem);margin-top:2.4em;margin-bottom:.5em}
h3{font-weight:600;font-size:1.45rem;margin-top:1.8em;margin-bottom:.35em}
p,ul,ol{margin:0 0 1.05em}
li{margin-bottom:.35em}
strong{font-weight:600}
.eyebrow{font:500 .78rem/1.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--timber);margin:0 0 .8em}
.lede{font-size:1.2rem;line-height:1.6;color:var(--ink);max-width:var(--measure)}
.meta{font:400 .8rem/1.5 var(--mono);color:var(--muted)}
.meta a{color:var(--muted)}
code,.ref{font-family:var(--mono);font-size:.88em;background:var(--steel-soft);padding:.05em .35em;border-radius:3px}

/* Héros */
.hero{background:var(--sheet);border-bottom:1px solid var(--rule)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:center;padding-block:clamp(36px,6vw,72px)}
.hero h1 span{color:var(--timber)}
.hero .lede{margin-top:1em}
.hero figure{margin:0}
.hero figcaption,.fig figcaption{font:400 .75rem/1.5 var(--mono);color:var(--muted);margin-top:8px}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:1.4em}
.btn{display:inline-block;font:500 .85rem/1 var(--mono);letter-spacing:.03em;text-decoration:none;padding:13px 18px;border:2px solid var(--ink);color:var(--ink);background:transparent}
.btn:hover{background:var(--ink);color:var(--sheet)}
.btn.primary{background:var(--timber);border-color:var(--timber);color:#fff}
.btn.primary:hover{background:var(--ink);border-color:var(--ink);color:var(--sheet)}

/* Schémas (SVG en ligne) */
.dg-steel{fill:var(--steel)} .dg-wood{fill:var(--timber-soft);stroke:var(--timber);stroke-width:1.5}
.dg-ring{fill:none;stroke:var(--timber);stroke-width:1.2;opacity:.7}
.dg-support{fill:var(--zinc);stroke:var(--rule);stroke-width:1}
.dg-hole{fill:var(--sheet)} .dg-nail{fill:var(--timber)}
.dg-dim{stroke:var(--ink);stroke-width:1;fill:none} .dg-arrow{fill:var(--ink)}
.dg-txt{font:500 11px var(--mono);fill:var(--ink)} .dg-txt.m{fill:var(--muted)} .dg-txt.a{fill:var(--timber)}

/* Mise en page article */
.article{padding-block:clamp(32px,5vw,56px)}
.article .wrap{display:grid;grid-template-columns:230px minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start}
.article-head{grid-column:1/-1;max-width:880px}
.article-head .meta{margin-top:1.1em}
.side{position:sticky;top:20px;font:400 .82rem/1.55 var(--mono);border-top:3px solid var(--ink);padding-top:12px}
.side h2{font:500 .72rem/1.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.side ol{list-style:none;padding:0;margin:0 0 20px;counter-reset:t}
.side li{margin:0;border-bottom:1px solid var(--rule)}
.side li a{display:block;padding:7px 0;color:var(--ink);text-decoration:none}
.side li a:hover{color:var(--timber)}
.side dl{display:grid;grid-template-columns:auto 1fr;gap:4px 10px;margin:0}
.side dt{color:var(--muted)} .side dd{margin:0}
.body{min-width:0;max-width:var(--measure)}
.body > h2:first-child{margin-top:0}
.body ul,.body ol{padding-left:1.25em}

/* Réponse courte (extrait optimisé) */
.answer{background:var(--sheet);border:1px solid var(--rule);border-left:6px solid var(--timber);padding:18px 22px;margin:0 0 1.6em}
.answer .eyebrow{margin-bottom:.4em}
.answer p:last-child{margin-bottom:0}

.note{background:var(--steel-soft);padding:14px 18px;margin:1.4em 0;font-size:.97rem}
.note strong:first-child{font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;display:block;color:var(--steel);margin-bottom:4px}
.note p:last-child{margin-bottom:0}

.fig{margin:1.6em 0;background:var(--sheet);border:1px solid var(--rule);padding:16px}
.fig svg{display:block;margin-inline:auto}

/* Tableaux techniques */
.table-scroll{overflow-x:auto;margin:1.4em 0;border:1px solid var(--rule);background:var(--sheet)}
table{border-collapse:collapse;width:100%;font:400 .86rem/1.45 var(--mono);font-variant-numeric:tabular-nums}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:500;background:var(--steel-soft);color:var(--ink);white-space:nowrap}
tr:last-child td{border-bottom:0}

/* Étapes */
.steps{list-style:none;padding:0!important;counter-reset:s}
.steps > li{counter-increment:s;position:relative;padding:0 0 1.1em 3.1em;margin:0}
.steps > li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:.1em;font:800 1.6rem/1 var(--display);color:var(--timber)}
.steps > li strong:first-child{display:block;font-family:var(--display);font-size:1.25rem;font-weight:600;letter-spacing:.01em}

/* FAQ */
.faq details{border-bottom:1px solid var(--rule);padding:12px 0}
.faq summary{cursor:pointer;font-weight:600;list-style-position:outside}
.faq details p{margin:.6em 0 0}

/* Grille de guides (accueil) */
.guides{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:1.4em 0 0}
.guide{display:flex;flex-direction:column;gap:8px;background:var(--sheet);border:1px solid var(--rule);padding:20px;text-decoration:none;color:var(--ink)}
.guide:hover{border-color:var(--ink);color:var(--ink)}
.guide .k{font:500 .72rem/1.3 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--timber)}
.guide h3{margin:0;font-size:1.55rem}
.guide p{margin:0;font-size:.95rem;color:var(--muted)}

/* Produits (comparatif) */
.pick{background:var(--sheet);border:1px solid var(--rule);margin:1.4em 0;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 20px;padding:20px 22px}
.pick h3{margin:0;grid-column:1/-1}
.pick .tag{font:500 .72rem/1.3 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--timber);grid-column:1/-1;margin-bottom:4px}
.pick p,.pick ul{grid-column:1/-1;margin-bottom:.6em}
.pick .specs{font:400 .82rem/1.5 var(--mono);color:var(--muted)}
.pick .btn{justify-self:start;grid-column:1/-1;margin-top:6px}

/* Calculateur */
.calc{background:var(--sheet);border:2px solid var(--ink);padding:20px 22px;margin:1.6em 0}
.calc form{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;align-items:end}
.calc label{display:flex;flex-direction:column;gap:6px;font:500 .75rem/1.3 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.calc input,.calc select{font:500 1.05rem/1.2 var(--mono);padding:10px;border:1px solid var(--rule);background:var(--zinc);color:var(--ink);width:100%}
.calc output{display:block;margin-top:16px;font:400 .95rem/1.6 var(--mono);border-top:1px solid var(--rule);padding-top:14px}
.calc output b{font-weight:500;color:var(--timber)}

/* Pied de page */
.site-foot{background:#172033;color:#C9D3D1;margin-top:56px;font:400 .82rem/1.6 var(--mono)}
.site-foot .wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;padding-block:40px}
.site-foot h2{font:500 .72rem/1.3 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:#F07A5C;margin:0 0 10px}
.site-foot a{color:#E6ECEA;text-decoration:none}
.site-foot a:hover{text-decoration:underline;color:#fff}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot .fine{grid-column:1/-1;border-top:1px solid #2A3446;padding-top:18px;color:#9AA7A4}

.page{padding-block:clamp(32px,5vw,56px)}
.page .body{max-width:var(--measure)}
.page h1{margin-bottom:.4em}

@media (max-width:860px){
  .hero .wrap,.article .wrap{grid-template-columns:minmax(0,1fr)}
  .side{position:static}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
html{scroll-behavior:smooth}
.dg-block{fill:var(--rule);stroke:var(--muted);stroke-width:1}

/* Spécificités : quadrillage d'épure et colonne de repères à droite */
.hero{background-color:var(--sheet);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px}
.article .wrap{grid-template-columns:minmax(0,1fr) 230px}
.article .wrap{grid-auto-flow:row dense}
.article .side{grid-column:2}
.article .body{grid-column:1}
.side{border-top-color:var(--timber)}
.answer{border-left:0;border-top:6px solid var(--timber)}
.dg-block{fill:var(--rule);stroke:var(--muted);stroke-width:1}
@media (max-width:860px){.article .side,.article .body{grid-column:1;grid-row:auto}}
@media (max-width:860px){.article .wrap{grid-template-columns:minmax(0,1fr)}}