/* ============================================================
   Campus — design system
   ============================================================ */

:root{
  --ink:#0B1020;
  --ink-2:#1B2337;
  --muted:#6B7A99;
  --pale:#9AA7C0;
  --line:#E6EAF2;
  --bg:#FBFCFE;
  --card:#FFFFFF;

  --brand:#4338CA;
  --brand-2:#6D28D9;
  --brand-3:#0EA5E9;
  --gold:#F59E0B;
  --mint:#10B981;
  --rose:#E11D48;

  --grad:linear-gradient(120deg,#312E81 0%,#4338CA 38%,#7C3AED 70%,#0EA5E9 100%);
  --grad-soft:linear-gradient(120deg,#EEF2FF,#F5F3FF 50%,#ECFEFF);

  --r-sm:12px; --r:18px; --r-lg:26px; --r-xl:34px;
  --sh-1:0 1px 2px rgba(11,16,32,.04),0 8px 24px rgba(11,16,32,.05);
  --sh-2:0 2px 4px rgba(11,16,32,.05),0 18px 44px rgba(67,56,202,.12);
  --sh-3:0 30px 80px rgba(49,46,129,.22);

  --max:76rem;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.shell{max-width:var(--max);margin:0 auto;padding:0 1.5rem}

/* ---------------------------------------------------------- nav */

.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.35s cubic-bezier(.4,0,.2,1);
  padding:1.1rem 0;
}
.nav.solid{
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--line);
  padding:.7rem 0;
  box-shadow:0 1px 20px rgba(11,16,32,.05);
}

.nav-in{display:flex;align-items:center;gap:2rem}

.logo{display:flex;align-items:center;gap:.75rem;flex-shrink:0}
.logo-mark{
  width:42px;height:42px;border-radius:13px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:1.05rem;
  box-shadow:0 6px 18px rgba(67,56,202,.35);
  transition:.3s;
}
.logo:hover .logo-mark{transform:rotate(-8deg) scale(1.06)}
.logo-txt strong{display:block;font-size:.97rem;font-weight:800;letter-spacing:-.01em;line-height:1.2}
.logo-txt span{display:block;font-size:.7rem;color:var(--muted);font-weight:500}

.nav.top .logo-txt strong{color:#fff}
.nav.top .logo-txt span{color:rgba(255,255,255,.7)}

.menu{display:flex;align-items:center;gap:.25rem;margin-left:auto}
.menu a{
  position:relative;padding:.55rem .95rem;font-size:.89rem;font-weight:500;
  color:var(--muted);border-radius:10px;transition:.2s;
}
.menu a::after{
  content:'';position:absolute;left:50%;bottom:.3rem;width:0;height:2px;
  background:var(--brand);border-radius:2px;transform:translateX(-50%);transition:width .25s;
}
.menu a:hover{color:var(--ink)}
.menu a:hover::after,.menu a.on::after{width:1.2rem}
.menu a.on{color:var(--brand);font-weight:600}

.nav.top .menu a{color:rgba(255,255,255,.8)}
.nav.top .menu a:hover,.nav.top .menu a.on{color:#fff}
.nav.top .menu a::after{background:#fff}

.nav-cta{
  padding:.6rem 1.3rem!important;background:var(--brand);color:#fff!important;
  border-radius:11px;font-weight:600!important;box-shadow:0 4px 14px rgba(67,56,202,.3);
  transition:.25s;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(67,56,202,.4)}
.nav-cta::after{display:none!important}
.nav.top .nav-cta{background:#fff;color:var(--brand)!important}

.burger{display:none;margin-left:auto;width:42px;height:42px;border:0;background:none;
        cursor:pointer;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.burger i{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.nav.top .burger i{background:#fff}

@media(max-width:940px){
  .burger{display:flex}
  .menu{
    position:fixed;top:0;right:-100%;width:min(82vw,20rem);height:100vh;
    background:#fff;flex-direction:column;align-items:stretch;gap:.2rem;
    padding:5.5rem 1.4rem 2rem;margin:0;transition:right .35s cubic-bezier(.4,0,.2,1);
    box-shadow:-20px 0 60px rgba(11,16,32,.14);
  }
  .menu.open{right:0}
  .menu a{color:var(--ink)!important;padding:.85rem 1rem;font-size:.95rem}
  .menu a::after{display:none}
  .nav-cta{text-align:center;margin-top:.8rem}
}

/* ---------------------------------------------------------- hero */

.hero{
  position:relative;background:var(--grad);color:#fff;overflow:hidden;
  padding:11rem 0 8rem;
}
.hero.sm{padding:9rem 0 5rem}

.hero::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(60rem 30rem at 15% 10%,rgba(255,255,255,.14),transparent 60%),
    radial-gradient(40rem 26rem at 85% 80%,rgba(14,165,233,.28),transparent 60%);
}
.hero::after{
  content:'';position:absolute;left:0;right:0;bottom:-1px;height:80px;
  background:var(--bg);
  clip-path:polygon(0 100%,100% 0,100% 100%);
}

.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.38;animation:drift 22s ease-in-out infinite}
.blob.a{width:26rem;height:26rem;background:#818CF8;top:-8rem;right:-6rem}
.blob.b{width:20rem;height:20rem;background:#22D3EE;bottom:-6rem;left:-4rem;animation-delay:-8s}
.blob.c{width:16rem;height:16rem;background:#C084FC;top:40%;left:55%;animation-delay:-14s}

@keyframes drift{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(3rem,-2rem) scale(1.1)}
  66%{transform:translate(-2rem,2.5rem) scale(.94)}
}

.hero-in{position:relative;z-index:2;max-width:var(--max);margin:0 auto;padding:0 1.5rem}

.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;padding:.42rem 1rem;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  border-radius:999px;font-size:.76rem;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;margin-bottom:1.6rem;backdrop-filter:blur(10px);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:#4ADE80;
           box-shadow:0 0 0 4px rgba(74,222,128,.25);animation:pulse 2.4s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 9px rgba(74,222,128,0)}}

.hero h1{
  font-size:clamp(2.1rem,5.6vw,4rem);font-weight:800;letter-spacing:-.035em;
  line-height:1.08;margin-bottom:1.2rem;max-width:20ch;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,#A5F3FC,#C4B5FD 55%,#FDE68A);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{font-size:clamp(.98rem,1.9vw,1.15rem);opacity:.88;max-width:44ch;line-height:1.7}

.hero-cta{display:flex;gap:.9rem;flex-wrap:wrap;margin-top:2.4rem}

/* ---------------------------------------------------------- buttons */

.btn{
  display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.7rem;
  border-radius:13px;font-size:.92rem;font-weight:600;border:0;cursor:pointer;
  transition:.25s cubic-bezier(.4,0,.2,1);white-space:nowrap;
}
.btn-light{background:#fff;color:var(--brand);box-shadow:0 8px 26px rgba(0,0,0,.18)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.24)}
.btn-glass{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.3);
           backdrop-filter:blur(10px)}
.btn-glass:hover{background:rgba(255,255,255,.2)}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 6px 20px rgba(67,56,202,.3)}
.btn-brand:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(67,56,202,.42)}
.btn-ghost{background:transparent;color:var(--brand);border:1.5px solid #D6D9F5}
.btn-ghost:hover{background:#EEF2FF;border-color:var(--brand)}
.btn-sm{padding:.55rem 1.1rem;font-size:.84rem;border-radius:10px}

/* ---------------------------------------------------------- sections */

section{padding:5rem 0}
section.tight{padding:3.5rem 0}

.head{margin-bottom:2.8rem;max-width:44rem}
.head.center{margin-left:auto;margin-right:auto;text-align:center}

.kicker{
  display:inline-block;font-size:.74rem;font-weight:800;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);margin-bottom:.75rem;
}
.head h2{font-size:clamp(1.55rem,3.4vw,2.4rem);font-weight:800;letter-spacing:-.028em;line-height:1.18}
.head p{color:var(--muted);font-size:1rem;margin-top:.7rem;line-height:1.7}

.headline{display:flex;align-items:flex-end;justify-content:space-between;gap:1.5rem;flex-wrap:wrap}

/* ---------------------------------------------------------- grid */

.grid{display:grid;gap:1.4rem}
.g2{grid-template-columns:repeat(auto-fit,minmax(21rem,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(17.5rem,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(13rem,1fr))}

/* ---------------------------------------------------------- cards */

.card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;transition:.35s cubic-bezier(.4,0,.2,1);
}
.card:hover{transform:translateY(-5px);border-color:#D9DEF0;box-shadow:var(--sh-2)}

.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s}
.card:hover .card-media img{transform:scale(1.07)}
.card-media::after{content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,16,32,.35),transparent 55%)}

.card-body{padding:1.5rem}
.card-body h3{font-size:1.06rem;font-weight:700;letter-spacing:-.012em;line-height:1.35;margin-bottom:.5rem}
.card-body p{font-size:.88rem;color:var(--muted);line-height:1.65}

.card-arrow{
  position:absolute;top:1.2rem;right:1.2rem;width:36px;height:36px;border-radius:11px;
  background:rgba(255,255,255,.92);display:grid;place-items:center;color:var(--brand);
  opacity:0;transform:translate(6px,-6px);transition:.3s;font-size:1rem;
  box-shadow:0 4px 14px rgba(0,0,0,.14);
}
.card:hover .card-arrow{opacity:1;transform:translate(0,0)}

/* feature card */
.feat{
  position:relative;padding:2rem 1.7rem;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);transition:.35s;overflow:hidden;
}
.feat::before{
  content:'';position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:.35s;
}
.feat:hover{transform:translateY(-5px);box-shadow:var(--sh-2);border-color:transparent}
.feat:hover::before{opacity:1}
.feat>*{position:relative;z-index:1}

.feat-icon{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  font-size:1.35rem;margin-bottom:1.1rem;transition:.35s;
}
.feat:hover .feat-icon{transform:scale(1.1) rotate(-6deg)}
.feat h3{font-size:1.02rem;font-weight:700;margin-bottom:.45rem}
.feat p{font-size:.87rem;color:var(--muted);line-height:1.65}

/* ---------------------------------------------------------- stats */

.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(11rem,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
}
.stat{background:var(--card);padding:2rem 1.2rem;text-align:center;transition:.3s}
.stat:hover{background:var(--grad-soft)}
.stat b{
  display:block;font-size:2.5rem;font-weight:800;letter-spacing:-.04em;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat span{display:block;font-size:.8rem;color:var(--muted);margin-top:.5rem;font-weight:500}

/* ---------------------------------------------------------- chips */

.chip{
  display:inline-flex;align-items:center;gap:.35rem;padding:.3rem .8rem;
  border-radius:999px;font-size:.71rem;font-weight:700;letter-spacing:.025em;
}
.chip-i{background:#EEF2FF;color:#4338CA}
.chip-s{background:#D1FAE5;color:#065F46}
.chip-w{background:#FEF3C7;color:#92400E}
.chip-d{background:#FFE4E6;color:#9F1239}
.chip-v{background:#F3E8FF;color:#6B21A8}
.chip-g{background:#F1F5F9;color:#475569}

.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:2rem}
.filters a{
  padding:.5rem 1.1rem;background:var(--card);border:1px solid var(--line);
  border-radius:999px;font-size:.84rem;font-weight:500;color:var(--muted);transition:.22s;
}
.filters a:hover{border-color:#C7CEEA;color:var(--ink)}
.filters a.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;
              box-shadow:0 4px 14px rgba(67,56,202,.28)}

/* ---------------------------------------------------------- list rows */

.list{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.row{display:flex;align-items:center;gap:1.2rem;padding:1.15rem 1.5rem;
     border-bottom:1px solid #F3F5FA;transition:.22s}
.row:last-child{border-bottom:0}
.row:hover{background:#FAFBFE}

.cal{
  flex:0 0 3.9rem;text-align:center;border-radius:14px;padding:.6rem .3rem;
  background:var(--grad-soft);border:1px solid #E0E7FF;
}
.cal b{display:block;font-size:1.35rem;font-weight:800;color:var(--brand);line-height:1}
.cal span{display:block;font-size:.64rem;font-weight:700;color:#6366F1;
          text-transform:uppercase;letter-spacing:.06em;margin-top:.15rem}

.row-main{flex:1;min-width:11rem}
.row-main strong{display:block;font-size:.95rem;font-weight:650;letter-spacing:-.01em}
.row-main small{display:block;font-size:.8rem;color:var(--muted);margin-top:.2rem}
.row-side{text-align:right;font-size:.83rem;color:var(--ink-2);font-weight:600}
.row-side small{display:block;font-weight:400;color:var(--pale);font-size:.76rem}

/* ---------------------------------------------------------- CTA band */

.band{
  position:relative;background:var(--grad);border-radius:var(--r-xl);
  padding:3.5rem 2.5rem;color:#fff;overflow:hidden;text-align:center;
  box-shadow:var(--sh-3);
}
.band::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(30rem 18rem at 20% 0%,rgba(255,255,255,.16),transparent 60%);
}
.band>*{position:relative;z-index:1}
.band h2{font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:800;letter-spacing:-.028em;margin-bottom:.8rem}
.band p{opacity:.88;max-width:40ch;margin:0 auto 1.9rem;font-size:.98rem}

/* ---------------------------------------------------------- article */

.prose{font-size:1.04rem;line-height:1.85;color:#28324A;max-width:44rem}
.prose h2{font-size:1.45rem;font-weight:750;margin:2.2rem 0 .8rem;letter-spacing:-.02em}
.prose h3{font-size:1.18rem;font-weight:700;margin:1.8rem 0 .6rem}
.prose p{margin-bottom:1.15rem}
.prose ul,.prose ol{margin:0 0 1.15rem 1.35rem}
.prose li{margin-bottom:.45rem}
.prose a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{
  border-left:3px solid var(--brand);padding:.3rem 0 .3rem 1.2rem;
  margin:1.5rem 0;color:var(--muted);font-style:italic;
}
.prose img{border-radius:var(--r);margin:1.5rem 0}

.meta{display:flex;gap:1.3rem;flex-wrap:wrap;font-size:.8rem;color:var(--pale);margin-top:.9rem}
.meta span{display:inline-flex;align-items:center;gap:.35rem}

/* ---------------------------------------------------------- avatar */

.ava{
  width:60px;height:60px;border-radius:19px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-size:1.35rem;font-weight:800;
  box-shadow:0 6px 18px rgba(67,56,202,.28);transition:.35s;
}
.card:hover .ava{transform:rotate(-7deg) scale(1.06)}

/* ---------------------------------------------------------- empty */

.empty{
  text-align:center;padding:4.5rem 1.5rem;color:var(--pale);
  background:var(--card);border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty b{display:block;font-size:1.05rem;color:var(--muted);margin-bottom:.4rem;font-weight:600}
.empty span{font-size:.88rem}

/* ---------------------------------------------------------- footer */

footer{background:var(--ink);color:#8FA0BF;padding:4rem 0 0;margin-top:5rem}
.foot{display:grid;gap:2.5rem;grid-template-columns:1.4fr repeat(auto-fit,minmax(9rem,1fr))}
footer h4{color:#F8FAFC;font-size:.88rem;font-weight:700;margin-bottom:1rem;letter-spacing:-.01em}
footer p,footer a{font-size:.87rem;line-height:1.9}
footer a:hover{color:#C7D2FE}
.foot-logo{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.foot-bot{
  margin-top:3rem;padding:1.4rem 0;border-top:1px solid #1B2337;
  font-size:.8rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
}

/* ---------------------------------------------------------- reveal */

.rv{opacity:0;transform:translateY(26px);transition:opacity .75s,transform .75s}
.rv.in{opacity:1;transform:none}
.rv:nth-child(2){transition-delay:.08s}
.rv:nth-child(3){transition-delay:.16s}
.rv:nth-child(4){transition-delay:.24s}
.rv:nth-child(5){transition-delay:.32s}
.rv:nth-child(6){transition-delay:.4s}

@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .blob{animation:none}
}

@media(max-width:640px){
  section{padding:3.5rem 0}
  .band{padding:2.5rem 1.5rem;border-radius:var(--r-lg)}
  .row{flex-wrap:wrap}
  .row-side{text-align:left}
}

/* ---------------------------------------------------- correctifs v4 */

/* Compense la barre fixe sur les pages sans hero */
body.page{padding-top:78px}
body.page .nav{background:rgba(255,255,255,.92);backdrop-filter:blur(18px);
               border-bottom:1px solid var(--line);padding:.8rem 0}
body.page .nav .logo-txt strong{color:var(--ink)}
body.page .nav .logo-txt span{color:var(--muted)}
body.page .nav .menu a{color:var(--muted)}
body.page .nav .menu a.on{color:var(--brand)}
body.page .nav .burger i{background:var(--ink)}
body.page .nav .nav-cta{background:var(--brand);color:#fff!important}

/* Hero compact des pages internes */
.hero.sm{padding:8.5rem 0 5rem;min-height:auto}
.hero.sm h1{font-size:clamp(1.8rem,4.2vw,2.8rem);max-width:24ch}
.hero.sm p{font-size:1rem;max-width:48ch}
.hero.sm::after{height:56px}

/* Empeche le chevauchement du titre */
.hero-in{padding-top:1rem}

/* Contenu apres hero */
.after-hero{padding-top:3.5rem}

/* ---------------------------------------------------- correctifs v5 */

.card,.card-body,.feat{min-width:0}
.card-body h3,.card-body p{overflow-wrap:anywhere}
.grid{align-items:start}
.list{overflow:hidden}
.row{min-width:0}
.row-main{overflow:hidden}
.row-main strong,.row-main small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.head h2{overflow-wrap:anywhere}
.hero h1{overflow-wrap:anywhere}

/* ---------------------------------------------------- correctifs v6 */

footer{padding:3.5rem 0 0}
.foot{
  display:grid;gap:2.5rem 2rem;
  grid-template-columns:minmax(16rem,1.6fr) repeat(3,minmax(8rem,1fr));
  align-items:start;
}
.foot>div:first-child{max-width:24rem}
footer p{margin-bottom:.15rem}
footer h4{margin-bottom:.9rem}
.foot-logo{margin-bottom:.9rem}

@media(max-width:900px){
  .foot{grid-template-columns:repeat(2,1fr);gap:2rem 1.5rem}
  .foot>div:first-child{grid-column:1/-1;max-width:none}
}
@media(max-width:520px){
  .foot{grid-template-columns:1fr}
}