:root{
  --bg:#0b1220;
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.72);
  --line: rgba(255,255,255,0.16);
  --card: rgba(255,255,255,0.07);
  --card2: rgba(255,255,255,0.10);
  --accent:#a9c7ff;
  --accent2:#d7b06a;
  --radius: 18px;
  --shadow: 0 18px 55px rgba(0,0,0,0.35);
  --pad: 16px;
  --gap: 12px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);
  background: radial-gradient(1200px 800px at 15% 10%, rgba(169,199,255,0.18), transparent 55%),
              radial-gradient(900px 700px at 80% 20%, rgba(215,176,106,0.10), transparent 60%),
              var(--bg);
  overflow-x:hidden;
}

.container{max-width: 740px; margin:0 auto; padding: var(--pad);}

header{
  position: sticky; top:0; z-index:10;
  background: rgba(11,18,32,0.45);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
.topbar{
  display:flex; justify-content:space-between; align-items:flex-start;
  gap:12px; padding: 12px 0;
}
.brand strong{display:block; font-size: 15px; letter-spacing:.2px}
.brand span{display:block; font-size: 12px; color: var(--muted); margin-top:6px; line-height:1.35}

.stack{display:grid; gap: var(--gap); padding: 12px 0 30px;}

.card{
  background: rgba(11,18,32,0.45);     /* ✅ plus transparent */
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  backdrop-filter: blur(10px);
}
.card::before{
  content:"";
  position:absolute; inset:0;
  background: radial-gradient(520px 260px at 15% 0%, rgba(169,199,255,0.20), transparent 60%),
              radial-gradient(520px 260px at 90% 10%, rgba(215,176,106,0.12), transparent 55%);
  opacity:0.25; pointer-events:none;
}
.card > *{position:relative}

.card a,
.card a:visited {
  color: #fff;
}

.kicker{
  display:inline-flex; align-items:center; gap:10px;
  padding: 9px 12px;
  border:1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  font-size: 12px;
}
.dot{
  width:8px; height:8px; border-radius:999px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 6px rgba(169,199,255,0.10);
}

h1{margin: 12px 0 8px; font-size: 26px; line-height:1.05; letter-spacing:-.4px}
h2{margin: 0 0 10px; font-size: 18px; letter-spacing:-.2px}
h3{margin: 0 0 10px; font-size: 16px}

p{margin:0; color: var(--muted); line-height:1.65; font-size: 14px}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 10px 12px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-weight: 800;
  font-size: 13px;
  text-decoration:none;
}
.btn.primary{
  border-color: rgba(169,199,255,0.45);
  background: linear-gradient(135deg, rgba(169,199,255,0.22), rgba(215,176,106,0.12));
}

.btn-secondary {
  opacity: 0.5;
}
.btn-secondary:hover {
  opacity: 1;
}


.row{display:flex; gap:10px; flex-wrap:wrap; margin-top: 12px}

hr.sep{
  border:0;
  height:1px;
  background: rgba(255,255,255,0.10);
  margin: 12px 0;
}

ul{margin: 10px 0 0; padding-left: 18px; color: var(--muted); line-height:1.55}
small{color: var(--muted)}

details{
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 16px;
  background: rgba(0,0,0,0.12);
  overflow:hidden;
}
summary{
  list-style:none;
  cursor:pointer;
  padding: 12px 12px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  color: var(--text);
}
summary::-webkit-details-marker{display:none}
.chev{opacity:.8; transition: transform .15s ease}
details[open] .chev{transform: rotate(180deg)}
.detailsBody{padding: 0 12px 12px; color: var(--muted); font-size: 13px}

footer{
  padding: 18px 0 34px;
  border-top: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.60);
  font-size: 12px;
}

/* 1) Le filigrane DOIT être derrière le contenu, mais devant le background */
.watermark{
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;            /* ✅ plus -1 */
}

/* 2) L’image (ton fond) */
.watermark::before{
  content:"";
  position:absolute;
  inset:-10%;
  background-image: url("skeleton1.png");
  background-repeat:no-repeat;
  background-position: 85% 45%;
  background-size: min(900px, 75vw);
  opacity: 0.65;         /* ajuste 0.25 → 0.65 */
  filter: grayscale(1) contrast(1.15);
  transform: rotate(-6deg);
}

/* 3) Le voile sombre (si trop fort, tu ne verras rien) */
.watermark::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, rgba(11,18,32,0.35), rgba(11,18,32,0.70)); /* ✅ moins sombre */
}

/* 4) Tout le contenu au-dessus du filigrane */
header, main, footer, .container, .stack, .card{
  position: relative;
  z-index: 1;
}

footer a,
footer a:visited {
  color: #fff;
  text-decoration: none;
}

footer a:hover {
  opacity: 0.85;
  text-decoration: none;
}

@media (max-width: 768px) {
  .watermark::before {
    position: fixed;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: -1;
  }
}