/* ENSC Rennes – page d'attente */
:root{
  --bleu-dynamique:#0070B8; /* R0 V112 B184 */
  --bleu-profond:#003757;   /* R0 V55 B87 */
  --or:#C99100;             /* R201 V145 B0 */
  --gris:#3E3D40;           /* R62 V61 B64 */
  --fond:#F4F7FA;
  --blanc:#fff;
  --rayon:14px;
  --max:980px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:Arial,Helvetica,sans-serif;
  color:var(--gris);background:var(--blanc);line-height:1.55;font-size:15px;
}
img{max-width:100%;display:block}
a{color:var(--bleu-dynamique)}
a:focus-visible,button:focus-visible{outline:3px solid var(--or);outline-offset:3px}
.wrap{width:min(var(--max),100% - 32px);margin-inline:auto}

/* En-tête */
.site-header{background:var(--blanc);border-bottom:4px solid var(--bleu-dynamique);position:sticky;top:0;z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:8px}
.site-header img{height:56px;width:auto}
.site-header nav{display:flex;gap:22px;flex-wrap:wrap;font-size:.95rem;font-weight:600}
.site-header nav a{color:var(--bleu-profond);text-decoration:none;padding:4px 0;border-bottom:2px solid transparent}
.site-header nav a:hover{border-color:var(--or)}

/* Hero */
.hero{
  position:relative;color:#fff;text-align:center;
  background:
    linear-gradient(rgba(0,55,87,.82),rgba(0,55,87,.9)),
    url("../image-enscr/labo-01.jpg") center/cover no-repeat;
  padding:clamp(14px,2vw,24px) 0;
}
.hero .kicker{display:inline-block;background:var(--or);color:#fff;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.75rem;padding:4px 12px;border-radius:999px;margin-bottom:8px}
.hero h1{font-size:clamp(1.7rem,3.6vw,2.4rem);line-height:1.1;margin-bottom:8px}
p + p{margin-top:8px}
.hero p{max-width:640px;margin:0 auto;font-size:1rem;opacity:.95}

/* Sections */
section{padding:clamp(16px,2.2vw,28px) 0;scroll-margin-top:80px}
.alt{background:var(--fond)}
h2{white-space:nowrap;color:var(--bleu-profond);font-size:clamp(1.3rem,2.6vw,1.7rem);line-height:1.2;margin-bottom:10px;position:relative;padding-bottom:8px}
h2::after{content:"";position:absolute;left:0;bottom:0;width:64px;height:4px;border-radius:2px;background:var(--or)}
h3{color:var(--bleu-dynamique);font-size:1.1rem;margin-bottom:8px}
.lead{font-size:1.02rem;max-width:680px}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(20px,3vw,40px);align-items:start}
.split img,.photo{height:auto;aspect-ratio:4/3;border-radius:var(--rayon);box-shadow:0 14px 34px rgba(0,55,87,.18);width:100%;object-fit:cover}
.split.reverse{grid-template-columns:.9fr 1.1fr}
.split.reverse > :first-child{order:2}

/* Save the date */
.save{
  margin:14px 0;display:flex;gap:22px;align-items:center;flex-wrap:wrap;
  background:var(--bleu-profond);color:#fff;border-radius:var(--rayon);padding:22px 26px;border-left:8px solid var(--or)
}
.save .tag{background:var(--or);color:#fff;font-weight:800;text-transform:uppercase;letter-spacing:.07em;font-size:.8rem;padding:6px 12px;border-radius:6px}
.save .date{font-size:clamp(1.1rem,2.4vw,1.4rem);font-weight:700;line-height:1.25}
.save .date small{display:block;font-size:.95rem;font-weight:400;opacity:.9}

/* Listes d'événements */
.events{list-style:none;display:grid;gap:8px;margin-top:12px}
.events li{background:var(--blanc);border-radius:10px;padding:8px 14px 8px 16px;border-left:5px solid var(--bleu-dynamique);box-shadow:0 3px 12px rgba(0,55,87,.08)}
.events strong{color:var(--bleu-profond)}
.events span{display:block;font-size:.93rem}

.note{margin-top:10px;padding:10px 14px;border-radius:10px;background:rgba(201,145,0,.12);border:1px solid rgba(201,145,0,.45)}

/* Galerie */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery img{aspect-ratio:4/3;object-fit:cover;border-radius:10px;width:100%;transition:transform .3s}
.gallery img:hover{transform:scale(1.03)}

/* Contact / réseaux */
.contact a.mail{font-weight:700;word-break:break-word}
.social{display:flex;gap:22px;margin-top:26px;flex-wrap:wrap}
.social a{display:block;width:56px;height:56px;border-radius:50%;transition:transform .2s,box-shadow .2s}
.social a:hover{transform:translateY(-4px);box-shadow:0 10px 22px rgba(0,55,87,.25)}
.social img{width:100%;height:100%;border-radius:50%}

footer{background:var(--gris);color:#fff;text-align:center;padding:20px 0;font-size:.9rem}
footer a{color:#fff}

@media(max-width:820px){
  h2{white-space:normal}
  .split,.split.reverse{grid-template-columns:1fr}
  .split.reverse > :first-child{order:0}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .site-header nav{display:none}
  .site-header .wrap{justify-content:center}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Liens des salons */
.events strong a{color:var(--bleu-profond);text-decoration:none}
.events strong a:hover{color:var(--bleu-dynamique);text-decoration:underline}