/* ==========================================================
   SITE NSI — style.css
   Thème : papier ivoire + bleu nuit + accents par ressource
   ========================================================== */

:root{
  --bg:#fff7dc;
  --paper:rgba(255,253,246,.96);
  --navy:#17345d;
  --navy-2:#0f2848;
  --text:#24313b;
  --muted:#69747b;
  --line:rgba(23,52,93,.14);
  --blue:#3f7fc5;
  --green:#3c9a5f;
  --gold:#e7a928;
  --purple:#7757bd;
  --shadow:0 16px 40px rgba(44,54,57,.10);
  --radius:22px;
  --max:1160px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.6;background-color:var(--bg);
  background-image:
    radial-gradient(rgba(120,98,50,.045) .55px,transparent .55px),
    radial-gradient(rgba(255,255,255,.6) .55px,transparent .55px);
  background-position:0 0,3px 3px;background-size:6px 6px;
}
a{color:inherit}
.container{width:min(calc(100% - 32px),var(--max));margin:auto}
.site-header{padding:34px 0 0}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:16px;text-decoration:none}
.brand-icon{width:66px;height:66px;border-radius:18px;background:var(--navy);color:#fff;display:grid;place-items:center;font-size:30px;box-shadow:0 9px 22px rgba(23,52,93,.18)}
.brand h1{font-size:2.7rem;line-height:1;margin:0;color:var(--navy);letter-spacing:-.055em}
.brand p{margin:5px 0 0;color:var(--muted);font-size:.92rem}
.brain{font-size:42px;color:var(--navy)}
.navbar{margin-top:24px;background:var(--navy);border-radius:18px;padding:5px;display:flex;flex-wrap:wrap;box-shadow:var(--shadow)}
.navbar a{flex:1;text-align:center;min-width:130px;padding:15px 14px;border-radius:14px;color:#fff;text-decoration:none;font-weight:800;font-size:1.05rem;transition:.2s}
.navbar a:hover,.navbar a.active{background:rgba(255,255,255,.13)}
.hero{text-align:center;padding:54px 0 34px}
.hero h2{margin:0;color:var(--navy);font-size:clamp(2rem,5vw,3.25rem);letter-spacing:-.05em}
.hero p{max-width:760px;margin:12px auto;color:var(--muted);font-size:1.05rem}
.eyebrow{color:var(--navy);font-weight:900;letter-spacing:.14em;font-size:.72rem;margin:0 0 5px}
.breadcrumb{margin-top:30px;color:var(--muted);font-size:.84rem}
.breadcrumb a{text-decoration:none;color:var(--navy);font-weight:700}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:24px 0 18px}
.section-title h2{margin:0;color:var(--navy);font-size:1.8rem;letter-spacing:-.03em}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 22px 50px rgba(44,54,57,.14)}
.chapter-card{min-height:205px;display:flex;flex-direction:column;justify-content:space-between;text-decoration:none}
.chapter-icon{font-size:35px}
.chapter-no{color:var(--muted);font-size:.72rem;font-weight:900;letter-spacing:.12em}
.chapter-card h3{margin:5px 0;color:var(--navy);font-size:1.35rem}
.chapter-card p{margin:0;color:var(--muted);font-size:.9rem}
.button{display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:10px 14px;border-radius:12px;background:var(--navy);color:#fff;text-decoration:none;font-weight:800;font-size:.88rem}
.button.secondary{background:#edf2f8;color:var(--navy)}
.resource-list{display:grid;gap:12px}
.resource{display:flex;align-items:center;gap:14px;padding:15px 17px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.68);text-decoration:none}
.resource:hover{border-color:rgba(23,52,93,.3);background:#fff}
.resource-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:20px;background:#edf2f8}
.resource-main{min-width:0;flex:1}
.resource-main strong{display:block;color:var(--navy)}
.resource-main span{display:block;color:var(--muted);font-size:.8rem}
.resource-arrow{color:var(--navy);font-weight:900}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pair .mini{padding:20px;border-radius:18px;border:1px solid var(--line);background:var(--paper)}
.mini h3{margin:0;color:var(--navy)}
.mini p{color:var(--muted);font-size:.9rem}
.tag{display:inline-block;padding:5px 9px;border-radius:999px;font-size:.65rem;font-weight:900;letter-spacing:.1em}
.tag.course{background:#e4effa;color:#2c69a5}
.tag.corrected{background:#fff0d1;color:#9b6b12}
.tag.exercise{background:#e5f4e9;color:#287643}
.tag.memo{background:#fff1c9;color:#9a6812}
.tag.adapted{background:#eee8fb;color:#6345a1}
.home-cards .card{min-height:240px}
.home-cards h3{color:var(--navy);margin:10px 0 6px}
.home-cards p{color:var(--muted);margin:0}
.icon-big{font-size:36px}
.callout{margin:42px 0;padding:25px 28px;border:1px solid var(--line);border-radius:22px;background:rgba(255,253,246,.78);display:flex;gap:18px;align-items:center}
.callout-icon{font-size:34px}
.callout h3{margin:0;color:var(--navy)}
.callout p{margin:4px 0 0;color:var(--muted)}
footer{margin-top:65px;padding:26px 0 32px;background:var(--navy);color:#fff}
.footer-inner{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.footer-inner .muted{margin-left:auto;opacity:.75}
.empty{padding:25px;border:1px dashed rgba(23,52,93,.25);border-radius:16px;color:var(--muted);background:rgba(255,255,255,.4)}
main{padding-bottom:20px}
@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){
  .header-inner{align-items:flex-start}.brain{display:none}
  .brand h1{font-size:2.2rem}.brand-icon{width:55px;height:55px}
  .navbar a{min-width:50%;flex:1 1 45%}
  .grid,.pair{grid-template-columns:1fr}.grid-4{grid-template-columns:1fr 1fr}
  .section-title{display:block}
}
@media(max-width:440px){.container{width:min(calc(100% - 20px),var(--max))}.grid-4{grid-template-columns:1fr}.navbar a{min-width:100%}}

.external-logo{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;transition:.2s;flex:0 0 auto}
.external-logo img{display:block;width:150px;height:auto;border-radius:8px}
.external-logo:hover{transform:translateY(-2px)}
@media(max-width:700px){.external-logo img{width:115px}}
.pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
@media(max-width:760px){.pair{grid-template-columns:1fr}}

/* =========================================================
   ACCESSIBILITÉ — lecture confortable / EBEP
   ========================================================= */
:root{
  --font-scale:1;
}
html{
  font-size:calc(16px * var(--font-scale));
  scroll-behavior:smooth;
}
body{
  font-size:1.20rem;
  line-height:1.65;
  letter-spacing:.01em;
}
p, li{
  line-height:1.7;
}
h1,h2,h3,h4{
  line-height:1.25;
}
h2{
  font-size:clamp(2rem,4vw,3rem);
}
h3{
  font-size:1.45rem;
}
.navbar a,
.button,
.resource,
.external-logo{
  min-height:48px;
}
.navbar a,
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.card{
  padding:28px;
}
.resource{
  padding:16px 18px;
}
.breadcrumb{
  font-size:1rem;
}
.accessibility-tools{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:8px;
  flex-wrap:wrap;
  padding:10px 0 4px;
}
.accessibility-tools .access-label{
  font-weight:800;
  margin-right:4px;
}
.accessibility-tools button{
  min-width:46px;
  min-height:44px;
  padding:8px 12px;
  border:2px solid currentColor;
  border-radius:10px;
  background:transparent;
  font:inherit;
  font-weight:900;
  cursor:pointer;
}
.accessibility-tools button:focus-visible,
a:focus-visible,
button:focus-visible{
  outline:4px solid #ffbf47;
  outline-offset:3px;
}
.accessibility-tools button:hover{
  transform:translateY(-1px);
}
@media(max-width:700px){
  body{font-size:1.12rem}
  .accessibility-tools{justify-content:center}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    scroll-behavior:auto !important;
    transition:none !important;
    animation:none !important;
  }
}

/* Contraste et lisibilité */
.resource-main strong{font-size:1.05em}
.tag{font-weight:900;letter-spacing:.03em}
.muted{line-height:1.6}