:root{
  --abysse:#03060B;
  --carte:#0D1725;
  --carte-2:#070E18;
  --creux:#040910;
  --os:#DCE8F0;
  --brume:#72899D;

  /* bioluminescence */
  --luciole:#E8A34A;
  --algue:#3FD9A4;
  --meduse:#E0559B;
  --plancton:#5B9BF5;

  --r:14px;
}

*{box-sizing:border-box}
html,body{margin:0}
body{
  background:
    radial-gradient(900px 430px at 50% -14%, rgba(96,168,208,.16), transparent 72%),
    linear-gradient(180deg,#0B1524 0%,#060C15 38%,var(--abysse) 100%);
  background-attachment:fixed;
  color:var(--os);
  font-family:"Archivo","Segoe UI",system-ui,sans-serif;
  font-size:16px;
  line-height:1.55;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  /* le hub n'est qu'une grille de liens : rien a copier, et une selection
     accidentelle en glissant sur une carte n'apporte que du bruit */
  -webkit-user-select:none;
  user-select:none;
}

/* neige marine */
#neige{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
}

.enveloppe{
  position:relative;
  z-index:1;
  max-width:1080px;
  margin:0 auto;
  padding:72px 26px 90px;
}

/* ---------- En-tête ---------- */
.entete{
  padding-bottom:34px;
  margin-bottom:38px;
  border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(120,200,220,.34),rgba(120,200,220,.02)) 1;
}
.titre{
  font-family:"Eczar",Georgia,serif;
  font-weight:600;
  font-size:clamp(50px,11vw,104px);
  line-height:.94;
  letter-spacing:.11em;
  text-transform:uppercase;
  margin:0;
  background:linear-gradient(180deg,#EEF7FC 0%,#89B4CE 52%,#2E4E66 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.sous-titre{
  margin:14px 0 0;
  max-width:46ch;
  color:var(--brume);
}

/* ---------- Grille ---------- */
.grille{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(264px,1fr));
  gap:20px;
  perspective:1400px;
}

/* ---------- Carte ---------- */
.carte{
  --accent:var(--plancton);
  position:relative;
  display:flex;
  flex-direction:column;
  overflow:hidden;
  border-radius:var(--r);
  background:linear-gradient(170deg,var(--carte),var(--carte-2));
  border:1px solid rgba(150,195,220,.1);
  box-shadow:0 10px 30px rgba(0,0,0,.5);
  text-decoration:none;
  color:inherit;
  transform-style:preserve-3d;
  transition:transform .4s cubic-bezier(.2,.8,.3,1), box-shadow .4s ease, border-color .35s ease;
}
.carte::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(105deg,transparent 34%,rgba(190,230,245,.1) 47%,transparent 62%);
  transform:translateX(-130%);
  transition:transform .8s cubic-bezier(.2,.7,.3,1);
}
.carte:hover,.carte:focus-visible{
  transform:translateY(-8px) rotateX(5deg) rotateY(-4deg);
  border-color:color-mix(in srgb,var(--accent) 48%,transparent);
  box-shadow:
    0 26px 48px rgba(0,0,0,.6),
    0 0 34px -6px color-mix(in srgb,var(--accent) 42%,transparent);
}
.carte:hover::after,.carte:focus-visible::after{transform:translateX(130%)}
.carte:focus-visible{outline:2px solid var(--accent);outline-offset:4px}

.bandeau{
  display:flex;
  align-items:center;
  gap:10px;
  padding:15px 16px 14px;
  background:linear-gradient(180deg,rgba(160,205,230,.07),rgba(160,205,230,.015));
  border-bottom:1px solid rgba(0,0,0,.5);
}
.nom{
  font-family:"Eczar",Georgia,serif;
  font-size:18px;
  font-weight:600;
  line-height:1.15;
  letter-spacing:-.01em;
  margin:0;
  flex:1;
}
.fleche{
  flex:none;
  color:var(--accent);
  font-size:15px;
  opacity:.6;
  transition:transform .3s ease,opacity .3s ease;
}
.carte:hover .fleche{transform:translate(3px,-3px);opacity:1}

.illu{
  position:relative;
  aspect-ratio:5/2.4;
  display:grid;
  place-items:center;
  color:var(--accent);
  background:
    radial-gradient(120% 115% at 50% 128%, color-mix(in srgb,var(--accent) 26%,transparent), transparent 68%),
    var(--creux);
  border-bottom:1px solid rgba(0,0,0,.5);
}
.illu svg{
  width:56px;
  height:56px;
  opacity:.95;
  filter:drop-shadow(0 0 12px color-mix(in srgb,var(--accent) 50%,transparent));
  transition:filter .4s ease;
}
.carte:hover .illu svg{
  filter:drop-shadow(0 0 20px color-mix(in srgb,var(--accent) 75%,transparent));
}

.corps{padding:15px 16px 17px}
.texte{
  margin:0;
  font-size:13.5px;
  color:#A9BCCC;
}

/* ---------- Pied de page ---------- */
.pied-page{
  margin-top:52px;
  padding-top:18px;
  border-top:1px solid rgba(150,195,220,.08);
  font-size:12.5px;
  color:#586A7C;
}
.pied-page code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  color:var(--brume);
}

@media (max-width:620px){
  .enveloppe{padding:48px 18px 64px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important}
  .carte:hover,.carte:focus-visible{transform:none}
  .carte::after{display:none}
}