/* CS Network — styles.css (design figé) */
:root{
  --bordeaux:#8E1836; --bordeaux-hover:#6E1129; --bordeaux-active:#560D20;
  --violet:#5F5480; --violet-hover:#4A4166; --violet-active:#3A3352;
  --ink:#231E27; --text-2:#3F3845; --text-body:#2F2934; --muted:#5A5360;
  --bg:#F2F1F3; --surface:#FFFFFF; --surface-active:#F7F4F8;
  --border:#D9D5DD; --divider:#E4E1E7; --photo-bg:#E9E6EF;
  --font-display:'Newsreader',Georgia,serif;
  --font-text:'Source Serif 4',Georgia,serif;
  --container:1120px; --gutter:20px;
  --radius:0;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font-text);-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--bordeaux)} a:hover{color:var(--bordeaux-hover)}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--bordeaux);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
main{flex:1}

/* Header / footer */
.site-header{background:var(--surface);border-bottom:2px solid var(--bordeaux);position:sticky;top:0;z-index:5}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;min-height:48px}
.brand img{height:48px;width:auto;display:block;mix-blend-mode:multiply}
.nav{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.nav a{font-size:15px;color:var(--ink);text-decoration:none;padding:10px 8px;min-height:44px;display:flex;align-items:center;border-bottom:2px solid transparent}
.nav a:hover{color:var(--bordeaux)}
.nav a[aria-current="page"]{border-bottom-color:var(--bordeaux)}
.site-footer{border-top:2px solid var(--bordeaux);background:var(--surface)}
.site-footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding-top:18px;padding-bottom:18px;font-size:14px;color:var(--muted)}

/* Typo */
.eyebrow{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--violet);font-weight:600}
.h1{font-family:var(--font-display);font-weight:500;margin:0;letter-spacing:-.01em;text-wrap:balance}
.h1--home{font-size:clamp(34px,5.6vw,60px);line-height:1.05}
.h1--campus{font-size:clamp(40px,6.4vw,72px);line-height:1}
.h1--pole{font-size:clamp(38px,5.6vw,64px);line-height:1.02}
.h2{font-family:var(--font-display);font-weight:500;font-size:24px;margin:0}
.h2--sm{font-size:22px}
.lead{font-size:clamp(17px,1.8vw,19px);line-height:1.55;margin:0;color:var(--text-2);text-wrap:pretty}
.body-lg{font-size:18px;line-height:1.6;margin:0;color:var(--text-body);text-wrap:pretty}
.small{font-size:14px;color:var(--muted)}

/* Blocs */
.hero{padding:clamp(32px,7vw,88px) 0 clamp(28px,5vw,56px);display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:24px 64px;align-items:end}
.stack{display:flex;flex-direction:column;gap:16px}
.section-bar{border-top:2px solid var(--ink);padding:20px 0 12px;display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.grid{display:grid;gap:12px;padding-bottom:56px}
.grid--campus{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}
.grid--pole{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}
.back{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:10px 0;margin-top:12px;font-size:15px;color:var(--violet);text-decoration:none}
.back:hover{color:var(--bordeaux)}
.campus-head{padding:clamp(12px,3vw,40px) 0 clamp(24px,4vw,48px);display:flex;flex-direction:column;gap:12px}
.campus-head .lead{font-size:17px;max-width:620px}
.pole-layout{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:32px 64px;padding:clamp(8px,3vw,40px) 0 56px;align-items:start}
.pole-main{display:flex;flex-direction:column;gap:20px}
.pole-title{display:flex;flex-direction:column;gap:10px}
.ruled{border-top:2px solid var(--ink);padding-top:18px;display:flex;flex-direction:column;gap:10px}
.leads{display:flex;flex-direction:column;gap:12px}

/* Carte campus */
.card-campus{display:flex;flex-direction:column;gap:20px;min-height:180px;padding:20px;background:var(--surface);border:1px solid var(--border);border-top:4px solid var(--bordeaux);color:var(--ink);text-decoration:none;transition:border-color .15s,background-color .15s}
.card-campus:hover{border-color:var(--bordeaux);color:var(--ink)}
.card-campus:active{background:var(--surface-active)}
.card-campus__num{font-size:14px;color:var(--violet);font-weight:600}
.card-campus__body{display:flex;flex-direction:column;gap:6px;flex:1}
.card-campus__name{font-family:var(--font-display);font-size:32px;line-height:1.05;font-weight:500}
.card-campus__place{font-size:15px;color:var(--muted)}
.card-campus__foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--divider);padding-top:14px;font-size:15px}

/* Carte pôle */
.card-pole{display:flex;flex-direction:column;gap:10px;padding:18px 20px;background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--violet);color:var(--ink);text-decoration:none;transition:border-color .15s,background-color .15s}
.card-pole:hover{border-color:var(--bordeaux);color:var(--ink)}
.card-pole:active{background:var(--surface-active)}
.card-pole__head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.card-pole__name{font-family:var(--font-display);font-size:26px;line-height:1.1;font-weight:500}
.card-pole__tagline{font-size:16px;line-height:1.45;color:var(--text-2)}
.card-pole__people{font-size:14px;color:var(--violet);border-top:1px solid var(--divider);padding-top:10px}
.arrow{flex:none;color:var(--bordeaux)}

/* Carte responsable */
.card-lead{display:flex;gap:16px;align-items:center;padding:16px;background:var(--surface);border:1px solid var(--border)}
.card-lead__photo{width:88px;height:88px;flex:none;background:var(--photo-bg);object-fit:cover;display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:28px;color:var(--violet)}
.card-lead__info{display:flex;flex-direction:column;gap:4px;min-width:0}
.card-lead__name{font-family:var(--font-display);font-size:24px;line-height:1.1;font-weight:500}
.card-lead__role{font-size:15px;color:var(--text-2)}
.card-lead__meta{font-size:14px;color:var(--violet)}

/* Boutons de contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.btn{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:56px;padding:0 18px;color:#FFFFFF;text-decoration:none;font-size:17px;font-weight:600;border-radius:var(--radius);transition:background-color .15s}
.btn:hover{color:#FFFFFF}
.btn--email{background:var(--bordeaux)} .btn--email:hover{background:var(--bordeaux-hover)} .btn--email:active{background:var(--bordeaux-active)}
.btn--linkedin{background:var(--violet)} .btn--linkedin:hover{background:var(--violet-hover)} .btn--linkedin:active{background:var(--violet-active)}
.contact-note{font-size:14px;color:var(--muted);margin-top:-8px}