/* Le Laboratoire — design aligné sur kolosso.fr (sombre premium, glass, électrique) */
:root{
  --nuit:#1a2130; --nuit-2:#151b28; --nuit-deep:#0e131d;
  --electric:#2f2fe4; --electric-2:#5a59ff; --electric-soft:rgba(47,47,228,.18);
  --white:#f6f8ff; --muted:#aab2c5; --muted-2:#8e96ab;
  --line:rgba(255,255,255,.09); --line-strong:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.035); --glass-2:rgba(255,255,255,.06);
  --container:1120px; --radius:28px; --radius-sm:18px;
  --ease:cubic-bezier(.22,1,.36,1); --ease-spring:cubic-bezier(.32,.72,0,1);
  --font:"Montserrat",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);background:var(--nuit-deep);color:var(--white);
  line-height:1.6;font-weight:400;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  background-image:
    radial-gradient(900px 600px at 85% -5%, rgba(47,47,228,.20), transparent 60%),
    radial-gradient(700px 500px at 5% 12%, rgba(47,47,228,.10), transparent 55%),
    linear-gradient(180deg, var(--nuit) 0%, var(--nuit-deep) 40%, var(--nuit-deep) 100%);
  background-attachment:fixed;
}
a{color:var(--white);text-decoration:none}
img{max-width:100%;height:auto;display:block}

/* Nav pilule flottante */
.lab-nav{position:sticky;top:16px;z-index:50;display:flex;justify-content:center;padding:0 18px}
.lab-nav-in{width:min(var(--container),100%);display:flex;align-items:center;gap:16px;
  padding:10px 12px 10px 22px;border-radius:999px;background:rgba(20,26,39,.6);border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);
  box-shadow:0 18px 50px -22px rgba(0,0,0,.8)}
.lab-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.lab-brand img{height:26px;width:auto}
.lab-brand-txt{color:var(--white);font-size:1rem}
.lab-brand-txt b{color:var(--white)}
.lab-nav-sep{width:1px;height:22px;background:var(--line-strong)}
.lab-nav-label{color:var(--muted);font-size:.9rem;font-weight:600}
.lab-nav-cta{margin-left:auto;display:inline-flex;align-items:center;gap:10px;padding:10px 12px 10px 20px;
  border-radius:999px;border:1px solid var(--line-strong);background:var(--glass);color:var(--white);
  font-size:.86rem;font-weight:600;transition:background .3s var(--ease),border-color .3s var(--ease)}
.lab-nav-cta:hover{background:var(--glass-2);border-color:rgba(255,255,255,.3)}
.lab-nav-cta .ic{width:26px;height:26px;border-radius:999px;background:rgba(255,255,255,.14);display:grid;place-items:center;font-size:.9rem}

.lab-main{max-width:var(--container);margin:0 auto;padding:3.4rem 20px 5rem}

/* Eyebrow */
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  border:1px solid var(--line-strong);background:var(--glass);color:var(--muted);
  font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.22em}

/* Hero */
.lab-hero{margin:0 0 2.8rem;max-width:820px}
.lab-hero h1{font-size:clamp(2.4rem,6.5vw,4.6rem);font-weight:800;line-height:1;letter-spacing:-.04em;margin:22px 0 0}
.lab-hero .accent{background:linear-gradient(100deg,var(--electric) 0%,#6f6fff 55%,var(--white) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lab-hero p{font-size:1.08rem;color:var(--muted);max-width:62ch;margin:1.1rem 0 0;line-height:1.7}

/* Barre de recherche */
.lab-search{display:flex;align-items:center;gap:.5rem;max-width:560px;margin:0 0 1.6rem;
  background:var(--glass);border:1px solid var(--line-strong);border-radius:999px;padding:.32rem .4rem .32rem 1.1rem;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.lab-search:focus-within{border-color:var(--electric-2);box-shadow:0 0 0 3px var(--electric-soft)}
.lab-search-ic{display:flex;color:var(--muted-2);flex-shrink:0}
.lab-search input{flex:1;min-width:0;background:none;border:none;outline:none;color:var(--white);font:inherit;font-size:.95rem;padding:.55rem 0}
.lab-search input::placeholder{color:var(--muted-2)}
.lab-search input[type=search]::-webkit-search-cancel-button{-webkit-appearance:none;display:none}
.lab-search-clear{flex-shrink:0;width:26px;height:26px;border-radius:999px;display:grid;place-items:center;
  color:var(--muted);background:var(--glass-2);font-size:.78rem;text-decoration:none}
.lab-search-clear:hover{color:var(--white);text-decoration:none}
.lab-search-btn{flex-shrink:0;border:none;background:var(--electric);color:#fff;font:inherit;font-weight:600;font-size:.88rem;
  padding:.62rem 1.2rem;border-radius:999px;cursor:pointer;box-shadow:0 10px 24px -10px rgba(47,47,228,.6);transition:background .2s var(--ease)}
.lab-search-btn:hover{background:#3b3bef}
@media(max-width:520px){.lab-search-btn{padding:.62rem .9rem}}

/* Chips chapitres */
.lab-chips{display:flex;flex-wrap:wrap;gap:.55rem;margin:0 0 2.4rem}
.lab-chip{padding:.5rem 1rem;border-radius:999px;border:1px solid var(--line-strong);background:var(--glass);
  color:var(--muted);font-size:.84rem;font-weight:600;transition:.2s var(--ease)}
.lab-chip:hover{color:var(--white);background:var(--glass-2);border-color:rgba(255,255,255,.3)}
.lab-chip.on{background:var(--electric);border-color:var(--electric);color:#fff;
  box-shadow:0 10px 30px -10px rgba(47,47,228,.6)}

/* Grille + cartes */
.lab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:1.4rem}
.lab-card{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .5s var(--ease),border-color .4s var(--ease),background .4s var(--ease)}
.lab-card:hover{transform:translateY(-6px);border-color:var(--line-strong);background:var(--glass-2)}
.lab-card-cover{aspect-ratio:16/9;background:
  radial-gradient(120% 120% at 100% 0%, rgba(90,89,255,.5), transparent 60%),
  linear-gradient(140deg,var(--nuit-2),var(--nuit));overflow:hidden;position:relative}
.lab-card-cover img{width:100%;height:100%;object-fit:cover}
.lab-card-cover .lab-mark{position:absolute;right:16px;bottom:14px;width:34px;height:34px;opacity:.5}
.lab-card-body{padding:1.3rem 1.4rem 1.5rem;display:flex;flex-direction:column;flex:1}
.lab-card .chap{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--electric-2);margin:0 0 .55rem}
.lab-card h3{font-size:1.2rem;line-height:1.25;letter-spacing:-.02em;font-weight:700;color:var(--white);margin:0 0 .55rem}
.lab-card p{font-size:.9rem;color:var(--muted);margin:0 0 1.1rem;flex:1;line-height:1.6}
.lab-card .meta{font-size:.76rem;color:var(--muted-2);font-weight:600;letter-spacing:.02em}

.lab-empty{text-align:center;padding:4rem 1rem;color:var(--muted-2);border:1px dashed var(--line);border-radius:var(--radius)}

/* Article */
.lab-article{max-width:760px;margin:0 auto}
.lab-article .back{display:inline-flex;align-items:center;gap:6px;font-size:.85rem;font-weight:600;color:var(--muted);margin:0 0 1.6rem}
.lab-article .back:hover{color:var(--white)}
.lab-article .chap{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--electric-2);margin:0 0 .7rem}
.lab-article h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.06;letter-spacing:-.03em;font-weight:800;color:var(--white);margin:0 0 .8rem}
.lab-article .meta{font-size:.85rem;color:var(--muted-2);margin:0 0 2rem;font-weight:600}
.lab-cover{width:100%;border-radius:var(--radius);margin:0 0 2.2rem;border:1px solid var(--line)}
.lab-content{font-size:1.08rem;color:#d7dcea;line-height:1.8}
.lab-content > *:first-child{margin-top:0}
.lab-content h2{font-size:1.7rem;font-weight:700;letter-spacing:-.02em;color:var(--white);margin:2.4rem 0 .8rem}
.lab-content h3{font-size:1.32rem;font-weight:700;color:var(--white);margin:1.9rem 0 .6rem}
.lab-content p{margin:0 0 1.25rem}
.lab-content a{color:var(--electric-2);text-decoration:underline;text-underline-offset:3px}
.lab-content ul,.lab-content ol{margin:0 0 1.25rem;padding-left:1.4rem}
.lab-content li{margin:.4rem 0}
.lab-content img{border-radius:var(--radius-sm);margin:1.6rem 0;border:1px solid var(--line)}
.lab-content blockquote{margin:1.8rem 0;padding:1.1rem 1.5rem;border-left:3px solid var(--electric);
  background:var(--electric-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:1.14rem;color:var(--white)}
.lab-content pre{background:var(--nuit-2);border:1px solid var(--line);color:#d7dcea;padding:1rem 1.2rem;border-radius:var(--radius-sm);overflow-x:auto;font-size:.9rem}
.lab-content code{font-family:ui-monospace,Menlo,monospace}
.lab-content hr{border:none;border-top:1px solid var(--line);margin:2.6rem 0}

/* Pagination */
.lab-pager{display:flex;align-items:center;justify-content:center;gap:1rem;margin:2.6rem 0 0}
.lab-page-btn{padding:.6rem 1.2rem;border-radius:999px;border:1px solid var(--line-strong);background:var(--glass);
  color:var(--white);font-size:.86rem;font-weight:600;transition:.2s var(--ease)}
.lab-page-btn:hover{background:var(--glass-2);border-color:rgba(255,255,255,.3);text-decoration:none}
.lab-page-btn.is-off{opacity:.35;pointer-events:none}
.lab-page-info{font-size:.84rem;color:var(--muted);font-weight:600}

/* Footer */
.lab-foot{border-top:1px solid var(--line);margin-top:3rem;background:rgba(14,19,29,.6)}
.lab-foot-in{max-width:var(--container);margin:0 auto;padding:1.8rem 20px;display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:.6rem;font-size:.85rem;color:var(--muted-2)}
.lab-foot a{color:var(--white);font-weight:600}
.lab-foot a:hover{color:var(--electric-2)}

@media(max-width:600px){
  .lab-nav-label{display:none}
  .lab-nav-in{padding:9px 10px 9px 18px}
  .lab-hero h1{font-size:2.3rem}
}