:root{
  --bg:#f6f3e7;
  --text:#1a1a1a;
  --accent:#2b6cb0;
  --accent-2:#5aa3ff;
  --card:#ffffff;
  --muted:#6b7280;
  --shadow:0 8px 24px rgba(0,0,0,.12);
}

*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html,body{
  height:100%;
}

body{
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%,rgba(90,163,255,.15),transparent 60%),
    radial-gradient(800px 500px at 110% 10%,rgba(43,108,176,.10),transparent 60%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{
  display:block;
  max-width:100%;
  height:auto;
  float:left;
  margin:8px 24px 12px 0;
  border-radius:18px;
  box-shadow:var(--shadow);
  animation:float-in .7s ease-out both;
}

ul{list-style:square}
ul li{padding:.2rem 0}
th{width:200px}

#entete-de-page,
#bloc-menu,
#contenu,
#pied-de-page{
  max-width:980px;
  margin-inline:auto;
}

#entete-de-page{
  height:auto;
  padding:32px 24px;
  background:
    linear-gradient(135deg,rgba(43,108,176,.18),rgba(90,163,255,.12)),
    #e5e7eb;
  text-align:center;
  font-variant:small-caps;
  font-weight:800;
  letter-spacing:.5px;
  border-radius:28px;
  margin-top:20px;
  animation:drop-in .6s ease-out both;
}

#entete-de-page p{
  font-size:clamp(24px,3.2vw,38px);
  line-height:1.2;
}

#bloc-menu{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  height:auto;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#fff;
  margin-top:16px;
  border-radius:16px;
  padding:6px;
  position:sticky;
  top:10px;
  z-index:10;
  backdrop-filter:saturate(1.1) blur(4px);
  box-shadow:var(--shadow);
}

#bloc-menu tr,
#bloc-menu tbody{display:contents}
#bloc-menu th{
  display:block;
  flex:1 1 0;
  text-align:center;
  font-weight:700;
  padding:10px 6px;
  cursor:pointer;
  border-radius:12px;
  position:relative;
  user-select:none;
  transition:transform .18s ease, background-color .18s ease;
}

#bloc-menu th::after{
  content:"";
  position:absolute;
  left:10%;
  right:10%;
  bottom:8px;
  height:3px;
  border-radius:2px;
  background:#fff;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease-out;
}

#bloc-menu th:hover{transform:translateY(-1px)}
#bloc-menu th:hover::after{transform:scaleX(1)}
#bloc-menu th:focus-visible{
  outline:3px solid rgba(255,255,255,.7);
  outline-offset:2px;
}

#contenu{
  background:linear-gradient(180deg,#ffffffdd,#ffffff);
  padding:24px;
  margin-top:16px;
  border-radius:22px;
  box-shadow:var(--shadow);
  animation:fade-in .5s ease-out both .05s;
}

#contenu h1{
  font-size:clamp(26px,3vw,34px);
  letter-spacing:.2px;
  margin-bottom:12px;
}

#contenu h2{
  font-size:clamp(20px,2.2vw,26px);
  color:var(--accent);
  margin:8px 0 6px;
}

#contenu p{
  margin:6px 0 8px;
}

#contenu hr{
  border:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,0,0,.12),transparent);
  margin:18px 0;
}

#infos{
  background:var(--card);
  color:#0f172a;
  font-style:normal;
  padding:16px 18px;
  border-radius:16px;
  border-left:6px solid var(--accent);
  box-shadow:var(--shadow);
}

#infos h3{
  margin-bottom:6px;
  color:var(--accent);
  font-size:clamp(18px,2vw,22px);
}

#pied-de-page{
  padding:14px 16px 24px;
  background:#eef2f7;
  font-size:13px;
  color:var(--muted);
  text-align:center;
  border-radius:18px;
  margin:16px auto 28px;
  animation:fade-in .45s ease-out both .1s;
}

#pied-de-page p{line-height:1.4}

@media (max-width:760px){
  img{
    float:none;
    margin:0 0 14px 0;
    width:100%;
  }
  #bloc-menu{
    top:0;
    border-radius:0;
    margin-top:0;
  }
  #bloc-menu th{padding:12px 4px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

@media (prefers-color-scheme:dark){
  :root{
    --bg:#0e1116;
    --text:#f1f5f9;
    --card:#0f172a;
    --muted:#94a3b8;
    --shadow:0 10px 26px rgba(0,0,0,.35);
  }
  #entete-de-page{background:linear-gradient(135deg,rgba(43,108,176,.25),rgba(90,163,255,.15)),#0b1220}
  #contenu{background:linear-gradient(180deg,#0f172a,#0b1220)}
  #pied-de-page{background:#0b1220}
}

@keyframes drop-in{
  from{opacity:0; transform:translateY(-8px)}
  to{opacity:1; transform:translateY(0)}
}

@keyframes fade-in{
  from{opacity:0}
  to{opacity:1}
}

@keyframes float-in{
  from{opacity:0; transform:translateY(8px) scale(.98)}
  to{opacity:1; transform:translateY(0) scale(1)}
}