/* Aiskill Academy : thème « flux lumineux » bleu nuit, commun aux pages cours et vidéos. */
:root{
  --bg:#050d1d; --surface:rgba(12,26,50,.62); --surface-solid:#0b1830; --ink:#e8f1ff; --muted:#93a7c4; --line:rgba(125,180,255,.16);
  --brand:#38bdf8; --brand-2:#2dd4bf; --brand-3:#3b82f6; --brand-ink:#03101f; --brand-soft:rgba(56,189,248,.12);
  --grad:linear-gradient(100deg,#3b82f6,#38bdf8 50%,#2dd4bf);
  --l1:#5eead4; --l2:#7dd3fc; --l3:#a5b4fc; --l1s:rgba(45,212,191,.14); --l2s:rgba(56,189,248,.14); --l3s:rgba(129,140,248,.16);
  --radius:16px; --shadow:0 10px 40px rgba(0,8,24,.55);
  --max:1160px; --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; --display:"Space Grotesk","Inter",system-ui,sans-serif;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:1.0625rem/1.65 var(--font);overflow-x:hidden}
main,footer{position:relative;z-index:1}
img,svg,iframe{max-width:100%;display:block}
a{color:var(--brand)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
::selection{background:var(--brand);color:var(--brand-ink)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--display);line-height:1.1;letter-spacing:-.02em;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(2.1rem,6vw,3.6rem)}
h2{font-size:clamp(1.6rem,4vw,2.3rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.lead{font-size:clamp(1.08rem,2.4vw,1.25rem);color:var(--muted);max-width:60ch}
.eyebrow{display:inline-block;font:700 .78rem/1 var(--display);letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:.9rem}

/* panneau en verre (comme le cadre de l'image) */
.glass{background:var(--surface);border:1px solid var(--line);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05)}

/* en-tête */
.site-header{position:sticky;top:0;z-index:50;background:rgba(5,13,29,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.logo{display:flex;align-items:center;gap:10px;font:700 1.1rem var(--display);color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.logo img{width:48px;height:48px}
/* titre du menu : lettrage en relief semi-transparent (comme le titre central de l'accueil) */
.brand3d--sm{font-family:var(--display);font-weight:700;font-size:1.12rem;letter-spacing:.08em;white-space:nowrap;line-height:1;
  color:rgba(255,255,255,.55);-webkit-text-stroke:.6px rgba(255,255,255,.8);
  text-shadow:0 1px 0 rgba(190,226,255,.45),0 2px 0 rgba(140,196,252,.35),0 3px 0 rgba(84,156,238,.26),0 4px 2px rgba(0,8,24,.5),0 0 14px rgba(56,189,248,.3)}
@media (max-width:560px){.brand3d--sm{font-size:.92rem;letter-spacing:.05em}.logo img{width:40px;height:40px}}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:var(--muted);text-decoration:none;padding:8px 14px;border-radius:10px;font-weight:600;font-size:.95rem}
.nav a:hover{color:var(--ink);background:var(--brand-soft)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--brand-soft);box-shadow:inset 0 0 0 1px rgba(56,189,248,.35)}
.icon-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);width:44px;height:44px;border-radius:12px;cursor:pointer;font-size:1.1rem}
.menu-btn{display:none}
@media (max-width:760px){
  .menu-btn{display:inline-grid;place-items:center}
  .nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;background:rgba(5,13,29,.96);border-bottom:1px solid var(--line);padding:10px 20px 16px;display:none}
  .nav.open{display:flex}
  .nav a{padding:14px 16px;font-size:1.05rem}
}

/* boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 24px;border-radius:12px;border:0;background:var(--grad);color:var(--brand-ink);font:700 1rem var(--display);text-decoration:none;cursor:pointer;box-shadow:0 0 0 1px rgba(125,211,252,.4),0 8px 30px rgba(56,189,248,.35);transition:transform .2s cubic-bezier(.23,1,.32,1)}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px rgba(125,211,252,.45)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.5rem}

/* ancienne accueil (accueil-classique.html) */
.hero{padding:clamp(48px,9vw,110px) 0 clamp(40px,6vw,80px)}
.hero-grid{display:grid;gap:40px;grid-template-columns:1.2fr .8fr;align-items:center}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr}}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.chat-demo{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow);display:grid;gap:12px;backdrop-filter:blur(14px)}
.bubble{padding:12px 16px;border-radius:14px;max-width:92%;font-size:.98rem;line-height:1.5}
.bubble.me{background:rgba(59,130,246,.22);justify-self:end}
.bubble.ai{background:rgba(45,212,191,.1);border:1px solid var(--line)}
.stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:2rem}
.stats strong{display:block;font:700 2rem/1 var(--display);color:var(--brand)}
.stats span{color:var(--muted);font-size:.9rem}

section.block{padding:clamp(40px,7vw,84px) 0}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(min(100%,290px),1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);position:relative}
.card h3{margin:0}
.card p{margin:0;color:var(--muted)}
.card .spacer{flex:1}
a.card{text-decoration:none;color:inherit;transition:transform .2s cubic-bezier(.23,1,.32,1),border-color .2s}
a.card:hover{transform:translateY(-4px);border-color:rgba(56,189,248,.55)}
.tag{display:inline-flex;align-items:center;gap:6px;font:700 .74rem var(--display);letter-spacing:.08em;text-transform:uppercase;padding:5px 12px;border-radius:8px;width:fit-content}
.tag.l1{background:var(--l1s);color:var(--l1)}
.tag.l2{background:var(--l2s);color:var(--l2)}
.tag.l3{background:var(--l3s);color:var(--l3)}
.meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:.85rem;color:var(--muted)}
.big-icon{font-size:2rem;line-height:1;color:#fcd34d;letter-spacing:.06em}
.stars{color:#fcd34d;letter-spacing:.04em}
.check{position:absolute;top:16px;right:16px;color:var(--l1);font-weight:800;font-size:.85rem}
.path{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
@media (max-width:860px){.path{grid-template-columns:1fr}}

/* filtres */
.filters{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:1.5rem 0 2rem}
.chip{border:1px solid var(--line);background:var(--surface);color:var(--muted);padding:9px 18px;border-radius:10px;font:600 .95rem var(--font);cursor:pointer;min-height:44px;backdrop-filter:blur(10px)}
.chip:hover{color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--grad);border-color:transparent;color:var(--brand-ink)}
.search{flex:1 1 220px;min-height:44px;padding:10px 16px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:1rem var(--font)}
.search::placeholder{color:var(--muted)}
.progress{height:8px;background:rgba(125,180,255,.12);border-radius:99px;overflow:hidden}
.progress>i{display:block;height:100%;background:var(--grad);width:0;transition:width .4s}

/* cours */
.article{max-width:780px;margin:0 auto;padding:40px 20px 80px}
.crumbs{font-size:.9rem;margin-bottom:1.5rem}
.step{display:grid;grid-template-columns:44px 1fr;gap:16px;margin:2rem 0}
.step .n{width:44px;height:44px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--grad);color:var(--brand-ink);display:grid;place-items:center;font:800 1rem var(--display)}
.step h3{margin-bottom:.3em}
pre,.prompt{background:rgba(3,10,22,.85);border:1px solid var(--line);color:#dbeafe;padding:16px 18px;border-radius:12px;overflow-x:auto;font:.92rem/1.55 ui-monospace,Consolas,monospace;white-space:pre-wrap;word-break:break-word;margin:0 0 1em;position:relative}
.copy{position:absolute;top:8px;right:8px;background:rgba(56,189,248,.18);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:.78rem;cursor:pointer}
.callout{background:var(--brand-soft);border-left:3px solid var(--brand);padding:16px 20px;border-radius:0 12px 12px 0;margin:2rem 0}
.pager{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:3rem}

/* vidéos */
.video{aspect-ratio:16/9;overflow:hidden;background:radial-gradient(circle at 50% 40%,#0e2a52,#040b18);position:relative;display:grid;place-items:center;color:var(--ink)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video button.play{all:unset;cursor:pointer;position:absolute;inset:0;display:grid;place-items:center}
.video .pbtn{width:64px;height:64px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--grad);color:var(--brand-ink);display:grid;place-items:center;font-size:1.4rem;padding-left:4px}
.video .soon{padding:16px;text-align:center;font-size:.95rem;color:var(--muted)}
.video-card{padding:0;overflow:hidden}
.video-card .body{padding:20px 24px 24px;display:flex;flex-direction:column;gap:10px}

details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 20px;margin-bottom:12px;backdrop-filter:blur(10px)}
summary{cursor:pointer;font-weight:700}
details p{margin:.8em 0 0;color:var(--muted)}

footer{border-top:1px solid var(--line);padding:40px 0;color:var(--muted);font-size:.92rem;margin-top:40px;background:rgba(3,9,20,.6)}
.foot{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.23,1,.32,1),transform .7s cubic-bezier(.23,1,.32,1)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.js .reveal{opacity:1;transform:none}}

/* ===== Admin ===== */
.admin h2{margin-top:2rem}
.tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin:1.5rem 0}
.tab{background:none;border:0;border-bottom:2px solid transparent;color:var(--muted);font:700 1rem var(--display);padding:12px 16px;cursor:pointer}
.tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--brand)}
.group{border:1px solid var(--line);border-radius:14px;padding:16px 20px 8px;margin:0 0 16px;background:var(--surface);backdrop-filter:blur(12px)}
.group legend{font:700 .9rem var(--display);color:var(--brand);padding:0 8px;letter-spacing:.04em}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:.88rem;color:var(--muted);font-weight:600}
.field input,.field textarea{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:rgba(3,10,22,.7);color:var(--ink);font:1rem var(--font);resize:vertical}
.field input:focus,.field textarea:focus{outline:2px solid var(--brand);outline-offset:1px}
.hint{color:var(--muted);font-size:.92rem}
.cards-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:2rem}
.cards-head h2{margin:0}
.acard{border:1px solid var(--line);border-radius:16px;padding:16px 20px;margin-bottom:16px;background:var(--surface);backdrop-filter:blur(12px)}
.acard__head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.acard__head h3{margin:0}
.acard__tools{display:flex;gap:6px;flex-wrap:wrap}
.acard__tools .chip{min-height:38px;padding:6px 12px}
.acard__tools .chip:disabled{opacity:.35;cursor:default}
.acard__grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}
@media (max-width:760px){.acard__grid{grid-template-columns:1fr}}
.acard__media{display:flex;flex-direction:column;gap:10px}
.acard__media .chip{align-self:flex-start;min-height:38px;padding:6px 12px}
.preview{aspect-ratio:16/10;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:rgba(3,10,22,.7);display:grid;place-items:center;color:var(--muted);font-size:.88rem;text-align:center;padding:0}
.preview.empty{padding:12px}
.preview img,.preview video{width:100%;height:100%;object-fit:cover;display:block}
.upload{position:relative;cursor:pointer;align-self:flex-start}
.formats{margin-top:1.5rem}
.formats pre{background:rgba(3,10,22,.85);border:1px solid var(--line);padding:12px;border-radius:10px;font-size:.8rem;white-space:pre-wrap;word-break:break-all;color:#dbeafe}
.savebar{position:sticky;bottom:0;z-index:20;display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap;margin-top:2rem;padding:14px 16px;border:1px solid var(--line);border-radius:16px 16px 0 0;background:rgba(5,13,29,.92);backdrop-filter:blur(12px)}
.savebar #status{margin-right:auto;color:var(--muted);font-size:.92rem}
.savebar #status.warn{color:#fcd34d}.savebar #status.ok{color:#5eead4}.savebar #status.err{color:#fda4af}

[hidden]{display:none!important}

/* ===== Pied de page : discret, de la même famille que l'en-tête (verre sombre, filet fin) ===== */
footer.site-foot{position:fixed;left:0;right:0;bottom:0;z-index:40;margin-top:0;padding:10px 20px;background:rgba(5,13,29,.55);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--line);color:var(--muted);font-size:.8rem}
footer.site-foot.foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 24px}
.foot__mark{display:flex;align-items:center;gap:8px;color:var(--muted);text-decoration:none;opacity:.85}
.foot__mark img{width:24px;height:24px}
.foot__legal{display:flex;flex-wrap:wrap;gap:0 20px}
.foot__legal a{color:var(--muted);text-decoration:none;padding:8px 0;transition:color .2s}
.foot__legal a:hover,.foot__mark:hover{color:var(--ink)}
.foot__legal a:focus-visible,.foot__mark:focus-visible{color:var(--ink)}

/* ===== Pages légales ===== */
.legal{max-width:780px;padding-top:48px;padding-bottom:24px}
.legal h1{margin-bottom:.3em}
.legal__date{color:var(--muted);font-size:.9rem;margin-bottom:2rem}
.legal section{margin:0 0 1.8rem}
.legal h2{font-size:1.25rem;margin-bottom:.5em}
.legal p,.legal li{color:#c5d3e8}
.legal ul{padding-left:1.2rem;margin:0 0 1em}
.legal li{margin-bottom:.5em}
.legal a{color:var(--brand)}
.legal .fill{background:rgba(252,211,77,.16);color:#fcd34d;border-radius:6px;padding:1px 6px;font-weight:600}

/* pied de page fixe : on réserve sa hauteur en bas de page, et la barre d'enregistrement de l'admin passe au-dessus */
body[data-page]{padding-bottom:52px}
.savebar{bottom:46px!important}

/* mobile : pied de page compact (une seule ligne de liens) */
@media (max-width:560px){footer.site-foot{padding:4px 12px;gap:0 12px;justify-content:center}footer.site-foot .foot__mark span{display:none}.foot__legal{gap:0 12px;justify-content:center}.foot__legal a{font-size:.72rem;padding:9px 0}body[data-page]{padding-bottom:44px}}

@media (max-width:560px){footer.site-foot .foot__mark,.foot .foot__mark{display:none}}
.lab-done{display:inline-block;margin-left:8px;font:700 .72rem var(--font);padding:2px 9px;border-radius:999px;background:linear-gradient(100deg,#2dd4bf,#a3e635);color:#03101f;vertical-align:1px}