/* exercice.org — feuille unique. Palette : papier craie, vert sapin (peinture de gymnase), cobalt (tapis de gym). Polices système uniquement : zéro requête externe. */
:root{
  --paper:#F2F3EE;
  --card:#FBFBF8;
  --ink:#1B2521;
  --muted:#5B665F;
  --pine:#163B33;
  --pine-soft:#1E4A40;
  --chalk:#F5F3EC;
  --cobalt:#2440C9;
  --cobalt-dark:#1B31A0;
  --line:#D6D9CD;
  --err:#8A3B2E;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.65;font-size:1.0625rem}
.wrap{max-width:70rem;margin:0 auto;padding:0 1.25rem}
img,svg{max-width:100%;height:auto}
a{color:var(--cobalt)}
a:hover{color:var(--cobalt-dark)}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:2px;border-radius:2px}

/* ---- header ---- */
.site-head{background:var(--pine);color:var(--chalk)}
.head-in{display:flex;align-items:center;gap:1rem;min-height:3.75rem;flex-wrap:wrap;padding-top:.5rem;padding-bottom:.5rem}
.logo{color:var(--chalk);text-decoration:none;font-weight:800;font-size:1.3rem;letter-spacing:-.02em;display:flex;align-items:center;gap:.5rem}
.logo-mark{background:var(--chalk);color:var(--pine);font-weight:900;padding:.05rem .4rem;border-radius:.3rem;font-size:1rem}
.logo-tld{color:#9DB8AF;font-weight:600}
.site-nav{margin-left:auto}
.site-nav ul{list-style:none;display:flex;gap:.25rem;margin:0;padding:0;flex-wrap:wrap}
.site-nav a{color:var(--chalk);text-decoration:none;padding:.45rem .7rem;border-radius:.4rem;font-weight:600;font-size:.95rem}
.site-nav a:hover,.site-nav a[aria-current]{background:var(--pine-soft);text-decoration:underline;text-underline-offset:3px}
.menu-btn{display:none;margin-left:auto;background:var(--pine-soft);color:var(--chalk);border:1px solid #2C5C50;border-radius:.4rem;padding:.45rem .9rem;font:inherit;font-weight:700;cursor:pointer}
@media (max-width:47rem){
  .menu-btn{display:block}
  .site-nav{display:none;width:100%;margin:0}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding-bottom:.75rem}
}

/* ---- typographie ---- */
h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.08;letter-spacing:-.025em;font-weight:900;margin:.4rem 0 1rem}
h2{font-size:clamp(1.35rem,2.6vw,1.7rem);letter-spacing:-.015em;font-weight:800;margin:2.5rem 0 .9rem}
h3{font-size:1.15rem;font-weight:800;margin:0 0 .5rem}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;color:var(--pine);margin:0}
.chapo{font-size:1.1rem;color:#333D38;max-width:46rem}
.chapo p{margin:.6rem 0}
.main{padding:2rem 1.25rem 3.5rem}
article{max-width:46rem}
article ol li,article ul li{margin:.3rem 0}

/* ---- fil d'ariane ---- */
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:.75rem}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{color:var(--line)}

/* ---- signature : le carnet d'entraînement ---- */
.tbl-wrap{overflow-x:auto;margin:1rem 0 1.5rem;border:1px solid var(--line);border-radius:.6rem;background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.95rem;min-width:34rem}
caption{caption-side:bottom;text-align:left;font-size:.82rem;color:var(--muted);padding:.6rem .9rem}
thead th{background:var(--pine);color:var(--chalk);text-align:left;padding:.6rem .9rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}
tbody th,tbody td{padding:.6rem .9rem;border-top:1px solid var(--line);text-align:left}
tbody th{font-weight:700}
tbody tr:nth-child(even){background:#F4F5EF}

.exo{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--pine);border-radius:.6rem;padding:1.1rem 1.25rem;margin:1rem 0}
.exo h3{display:flex;align-items:center;gap:.6rem}
.exo-n{background:var(--pine);color:var(--chalk);font-size:.8rem;font-weight:800;padding:.15rem .5rem;border-radius:.3rem;letter-spacing:.05em}
.exo ol{margin:.5rem 0 .25rem;padding-left:1.3rem}
.err{color:var(--err);font-size:.95rem;background:#F6ECE7;border-radius:.4rem;padding:.5rem .75rem;margin:.75rem 0 0}

/* ---- FAQ ---- */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:.6rem;margin:.5rem 0;padding:.15rem 1rem}
.faq summary{font-weight:700;cursor:pointer;padding:.6rem 0}
.faq summary:hover{color:var(--cobalt)}
.faq p{margin:.2rem 0 .9rem}

/* ---- produits / affiliation ---- */
.produits{background:var(--pine);color:var(--chalk);border-radius:.8rem;padding:1.5rem;margin:2.5rem 0 0}
.produits h2{color:var(--chalk);margin-top:0}
.prod-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}
.prod{background:var(--pine-soft);border-radius:.6rem;padding:1rem}
.prod p{margin:.25rem 0;font-size:.93rem;color:#D9E4DF}
.prod-name{font-weight:800;color:var(--chalk);font-size:1rem}
.prod-link{display:inline-block;margin-top:.4rem;font-weight:700;color:#BFD3FF}
.prod-link:hover{color:#fff}
.aff-note{font-size:.8rem;color:#9DB8AF;margin:1rem 0 0}
.aff-note a{color:#BFD3FF}
.rank-item{background:var(--card);border:1px solid var(--line);border-radius:.6rem;padding:1.1rem 1.25rem;margin:1rem 0}
.rank-tag{font-size:.75rem;font-weight:700;color:var(--pine);background:#E3E9DD;border-radius:1rem;padding:.15rem .6rem;margin-left:.5rem;white-space:nowrap}

/* ---- liens connexes ---- */
.related{margin-top:2.5rem}
.rel-list{list-style:none;padding:0;display:grid;gap:.5rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.rel-list a{display:block;background:var(--card);border:1px solid var(--line);border-radius:.5rem;padding:.6rem .85rem;text-decoration:none;font-weight:600}
.rel-list a:hover{border-color:var(--cobalt);text-decoration:underline}

/* ---- accueil ---- */
.hero{background:var(--pine);color:var(--chalk);padding:3.5rem 0 3rem}
.hero .eyebrow{color:#9DB8AF}
.hero h1{color:var(--chalk);font-size:clamp(2.4rem,6vw,4.2rem);margin:.6rem 0 1rem}
.hero-sub{font-size:1.15rem;max-width:38rem;color:#D9E4DF;margin:0 0 1.75rem}
.hero-cta{display:flex;gap:.75rem;flex-wrap:wrap}
.btn{display:inline-block;background:var(--chalk);color:var(--pine);font-weight:800;text-decoration:none;padding:.7rem 1.25rem;border-radius:.5rem}
.btn:hover{background:#fff;color:var(--pine)}
.btn-ghost{background:transparent;color:var(--chalk);border:2px solid #2C5C50}
.btn-ghost:hover{background:var(--pine-soft);color:#fff}
.section{padding:2.75rem 1.25rem 0}
.tiles{display:grid;gap:.75rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr))}
.tile{position:relative;background:var(--card);border:1px solid var(--line);border-radius:.6rem;padding:1rem 1.1rem;text-decoration:none;color:var(--ink)}
.tile:hover{border-color:var(--cobalt)}
.tile-name{display:block;font-weight:800;font-size:1.1rem;letter-spacing:-.01em}
.tile-sub{display:block;color:var(--muted);font-size:.88rem;margin-top:.15rem}
.tile-go{position:absolute;top:.9rem;right:1rem;color:var(--cobalt);font-weight:800}
.objs{display:grid;gap:.75rem;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr))}
.obj{background:var(--card);border:1px solid var(--line);border-radius:.6rem;padding:1.1rem 1.2rem;text-decoration:none;color:var(--ink)}
.obj:hover{border-color:var(--cobalt)}
.obj h3{color:var(--cobalt)}
.obj p{margin:.25rem 0 0;font-size:.93rem;color:var(--muted)}
.method{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.method p{margin:.25rem 0 0;color:var(--muted);font-size:.95rem}
.home-faq{max-width:46rem}

/* ---- plan du site ---- */
.map-grid{display:grid;gap:1.5rem 2.5rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));max-width:none}
.map-col h2{font-size:1.05rem;margin:1rem 0 .4rem}
.map-col ul{list-style:none;padding:0;margin:0}
.map-col li{margin:.25rem 0;font-size:.95rem}
.map-col a{text-decoration:none}
.map-col a:hover{text-decoration:underline}
article:has(.map-grid){max-width:none}

/* ---- footer ---- */
.site-foot{background:var(--ink);color:#C6CDC8;margin-top:4rem;padding:2.5rem 0 2rem;font-size:.92rem}
.f-grid{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr))}
.f-title{color:#fff;font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:.78rem;margin:0 0 .5rem}
.f-col ul{list-style:none;margin:0;padding:0}
.f-col li{margin:.3rem 0}
.f-col a,.f-legal a{color:#C6CDC8;text-decoration:none}
.f-col a:hover,.f-legal a:hover{color:#fff;text-decoration:underline}
.f-legal{border-top:1px solid #333D38;margin-top:2rem;padding-top:1.25rem;font-size:.8rem;color:#8B948E}
.f-legal p{margin:.35rem 0}

@media (prefers-reduced-motion:no-preference){
  .tile,.obj,.rel-list a,.btn{transition:border-color .15s,background .15s,color .15s}
}
@media print{.site-head,.site-foot,.produits{display:none}}