/* =========================================================
   CIDST — Centre d'Information et de Documentation
   Scientifique et Technique — feuille de style principale
   Concept directeur : la fiche documentaire (carte de
   catalogue) et la chronologie des supports de l'information,
   les deux objets qui définissent le métier du CIDST.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* couleurs */
  --ink:        #c5170d;
  --ink-soft:   #3c4c5e;
  --paper:      #f1ecdc;
  --paper-2:    #e7dfc7;
  --paper-3:    #ddd2ae;
  --card:       #fbf8ef;
  --clay:       #a6472a;
  --clay-dark:  #7e3720;
  --green:      #3c6a4c;
  --green-dark: #2b4e38;
  --line:       #cdbf98;
  --line-soft:  #e0d6b8;
  --white:      #fffdf6;
  --black-me :  #030202;
  --black-me2:  #161010;

  /* typo */
  --f-display: 'Fraunces', Georgia, serif;
  --f-body:    'IBM Plex Sans', system-ui, sans-serif;
  --f-mono:    'IBM Plex Mono', ui-monospace, monospace;

  --radius: 3px;
  --shadow-card: 0 1px 0 var(--line), 0 8px 20px -12px rgba(30,42,56,.35);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--paper);
  color: var(--black-me2);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: var(--green-dark); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover{ color: var(--clay); }

h1,h2,h3,h4{
  font-family: var(--f-display);
  color: var(--black-me);
  line-height: 1.12;
  margin: 0 0 .5em;
  font-weight: 600;
}
h1{ font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 500; }
h2{ font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3{ font-size: 1.25rem; }
p{ margin: 0 0 1em; }
ul,ol{ margin: 0 0 1em; padding-left: 1.3em; }
.container{ max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.eyebrow{
  font-family: var(--f-mono);
  font-size: 1.2rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--clay-dark);
  display:flex; align-items:center; gap:.6em;
  margin-bottom: .9em;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px; background: var(--clay-dark);
  display:inline-block;
}
.skip-link{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--white);padding:.6em 1em;z-index:200;}
.skip-link:focus{left:12px;top:12px;}

/* ---------- header / nav ---------- */
header.site-header{
  position: sticky; top:0; z-index: 100;
  background: var(--ink);
  border-bottom: 3px solid var(--clay-dark);
}
.header-inner{
  max-width:1120px; margin:0 auto; padding: 0 24px;
  display:flex; align-items:center; justify-content:space-between;
  gap: 16px;
  height: 76px;
}
.brand{ display:flex; align-items:center; gap:.7em; color:var(--white); text-decoration:none; flex:none; }
.brand:hover{ color:var(--white); }
.brand-mark{
  width:38px; height:38px; border:1.5px solid var(--paper-3);
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--f-mono); font-size:.62rem; letter-spacing:.03em;
  color: var(--paper); flex-shrink:0;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text strong{ font-family: var(--f-display); font-size:1.8rem; font-weight:600; }
.brand-text span{ font-family: var(--f-mono); font-size:.7rem; letter-spacing:.19em; color: var(--paper-3); text-transform:uppercase;}

/* ---------- navigation prioritaire (priority / greedy navigation) ----------
   Tant que les onglets tiennent sur une ligne, ils restent visibles dans
   .nav-items. Dès qu'ils débordent, le script (js/main.js) déplace les
   derniers onglets — visuellement, en clonant leur lien — dans le menu
   déroulant .nav-more-menu, ouvert via le bouton "Plus ▾". Le recalcul se
   fait au redimensionnement, dans les deux sens (rétrécissement/agrandissement).
*/
nav.main-nav{
  flex: 1 1 auto;
  min-width: 0;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  position: relative;
}
.nav-items{
  display:flex;
  align-items:center;
  gap: 4px;
  min-width:0;
  overflow:hidden;         /* verrou : rien ne doit jamais dépasser le fond sombre du header */
  flex-wrap:nowrap;        /* une seule ligne, toujours — pas de retour à la ligne qui déborderait */
}
nav.main-nav a{
  font-family: var(--f-mono);
  font-size:1rem;
  letter-spacing:.03em;
  color: var(--paper-3);
  text-decoration:none;
  padding: 8px 12px;
  border-radius: var(--radius);
  white-space:nowrap;
  transition: background .15s, color .15s;
}
nav.main-nav a b{ color: var(--clay); font-weight:600; margin-right:.5em;}
nav.main-nav a:hover, nav.main-nav a.active{ background: rgba(255,255,255,.08); color: var(--white); }

.nav-more{
  flex: none;
  position: relative;
  margin-left: 4px;
  display: flex; /* basculé en "none" par le script quand tout tient sur une ligne */
}
.nav-more-btn{
  font-family: var(--f-mono);
  font-size:1rem;
  letter-spacing:.03em;
  color: var(--paper-3);
  background: transparent;
  border: 1px solid rgba(255,255,255,.22);
  padding: 7px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  display:flex; align-items:center; gap:.4em;
  transition: background .15s, color .15s;
}
.nav-more-btn:hover, .nav-more-btn[aria-expanded="true"]{ background: rgba(255,255,255,.08); color: var(--white); }
.nav-more-btn.active{ color: var(#f1ecea); border-color: var(#f1ecea); }
.nav-more-btn .caret{ font-size:.65em; transition: transform .15s; }
.nav-more-btn[aria-expanded="true"] .caret{ transform: rotate(180deg); }

.nav-more-menu{
  display:none;
  flex-direction:column;
  position:absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: var(--ink);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: 0 16px 32px -10px rgba(0,0,0,.5);
  z-index: 60;
}
.nav-more-menu.open{ display:flex; }
.nav-more-menu a{ display:block; padding:10px 12px; }
.nav-more-menu a.active{ background: rgba(255,255,255,.08); color: var(--white); }

@media (max-width: 480px){
  .brand-text span{ display:none; } /* libère de la place pour la nav sur très petits écrans */
}

@media (prefers-reduced-motion: reduce){
  .nav-more-btn .caret{ transition:none; }
}

/* ---------- hero ---------- */
.hero{
  padding: 64px 0 20px;
  background:
    radial-gradient(ellipse at top right, rgba(166,71,42,.08), transparent 55%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}
.hero-grid{ display:grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items:start; }
@media (max-width: 860px){ .hero-grid{ grid-template-columns: 1fr; } }
.hero h1{ margin-bottom:.35em; }
.hero .lede{ font-size: 1.15rem; color: var(--ink-soft); max-width: 46ch; }
.hero-actions{ display:flex; gap:14px; margin-top: 28px; flex-wrap:wrap; }

.btn{
  font-family: var(--f-mono); font-size:.78rem; letter-spacing:.03em;
  padding: 12px 20px; border-radius: var(--radius);
  text-decoration:none; display:inline-flex; align-items:center; gap:.6em;
  border: 1.5px solid var(--ink);
  transition: transform .12s ease, background .15s;
}
.btn-primary{ background: var(--ink); color: var(--white); }
.btn-primary:hover{ background: var(--green-dark); color:var(--white); border-color:var(--green-dark); transform: translateY(-1px); }
.btn-ghost{ background: transparent; color: var(--ink); }
.btn-ghost:hover{ background: var(--ink); color: var(--white); }

/* ---------- signature: chronologie des supports ---------- */
.timeline-card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 22px 20px 18px;
}
.timeline-card .eyebrow{ margin-bottom: 14px; }
.timeline{ position:relative; padding-left: 22px; }
.timeline::before{
  content:""; position:absolute; left:6px; top:6px; bottom:6px; width:1px;
  background: repeating-linear-gradient(var(--line) 0 4px, transparent 4px 8px);
}
.tl-item{ position:relative; padding-bottom: 20px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:""; position:absolute; left:-22px; top:3px; width:9px; height:9px;
  border-radius:50%; background: var(--clay); border:2px solid var(--card);
  box-shadow: 0 0 0 1px var(--clay);
}
.tl-item .tl-date{ font-family: var(--f-mono); font-size:.72rem; color: var(--clay-dark); display:block; }
.tl-item .tl-label{ font-family: var(--f-display); font-size:1.02rem; font-weight:600; }
.tl-item p{ margin: .2em 0 0; font-size:.92rem; color: var(--ink-soft); }

/* ---------- sections ---------- */
section{ padding: 56px 0; }
section.alt{ background: var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-head{ display:flex; justify-content:space-between; align-items:flex-end; gap:24px; margin-bottom: 30px; flex-wrap:wrap; }
.section-head .view-all{ font-family: var(--f-mono); font-size:.78rem; }

.pillars{ display:grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
@media (max-width: 980px){ .pillars{ grid-template-columns: repeat(2,1fr);} }
@media (max-width: 560px){ .pillars{ grid-template-columns: 1fr; } }
.pillar{
  background: var(--card); border:1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; box-shadow: var(--shadow-card);
  display:flex; flex-direction:column; gap:10px;
  text-decoration:none; color: var(--ink);
  transition: transform .15s ease, border-color .15s;
}
.pillar:hover{ transform: translateY(-3px); border-color: var(--clay); color:var(--ink); }
.pillar .num{ font-family: var(--f-mono); font-size:.72rem; color: var(--clay-dark); }
.pillar h3{ margin:0; }
.pillar p{ margin:0; font-size:.9rem; color: var(--ink-soft); }

/* ---------- fiche documentaire (card catalog card) ---------- */
.fiche{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 20px 20px 18px;
  position: relative;
  display:flex; flex-direction:column; gap:8px;
  text-decoration:none; color:var(--ink);
}
.fiche:hover{ color: var(--ink); border-color: var(--clay); }
.fiche::before{ /* trou perforé */
  content:""; position:absolute; top:14px; left:14px;
  width:10px; height:10px; border-radius:50%;
  background: var(--paper-2); box-shadow: inset 0 1px 2px rgba(0,0,0,.25);
}
.fiche-head{ padding-left: 26px; display:flex; justify-content:space-between; gap:10px; align-items:baseline;}
.fiche-cote{ font-family: var(--f-mono); font-size:.68rem; color: var(--clay-dark); white-space:nowrap; }
.fiche-date{ font-family: var(--f-mono); font-size:.68rem; color: var(--ink-soft); }
.fiche h3{ padding-left:26px; margin: 2px 0 0; font-size: 1.15rem; }
.fiche .desc{ padding-left:26px; font-size:.92rem; color: var(--ink-soft); margin:0; }
.fiche-tag{ margin-left:26px; align-self:flex-start; font-family: var(--f-mono); font-size:.65rem; letter-spacing:.04em; text-transform:uppercase; color:var(--green-dark); background: rgba(60,106,76,.1); padding:3px 8px; border-radius: 20px; }
.fiche-cover{ margin: -20px -20px 8px; border-radius: var(--radius) var(--radius) 0 0; overflow:hidden; aspect-ratio: 16/9; background: var(--paper-2); }
.fiche-cover img{ width:100%; height:100%; object-fit:cover; display:block; }

.fiche-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap:20px; }
@media (max-width: 980px){ .fiche-grid{ grid-template-columns: repeat(2,1fr);} }
@media (max-width: 640px){ .fiche-grid{ grid-template-columns: 1fr; } }

/* ---------- drawer index (blog list controls) ---------- */
.drawer-bar{
  display:flex; flex-wrap:wrap; gap:8px; margin-bottom: 28px;
}
.drawer-bar button{
  font-family: var(--f-mono); font-size:.72rem; letter-spacing:.02em;
  background: var(--card); border:1px solid var(--line); color: var(--ink-soft);
  padding: 7px 14px; border-radius: 20px; cursor:pointer;
}
.drawer-bar button.active{ background: var(--ink); color:var(--white); border-color:var(--ink); }

/* ---------- article/page content ---------- */
.page-hero{ padding: 46px 0 30px; border-bottom:1px solid var(--line); }
.page-hero .eyebrow{ margin-bottom:.6em; }
.page-hero p.lede{ color: var(--ink-soft); max-width: 62ch; font-size: 1.05rem; }

.article-body{ max-width: 74ch; }
.article-body::after{ content:""; display:block; clear:both; }
.article-body h3{ margin-top: 1.6em; }
.article-body a{ word-break: break-word; }
.article-meta{
  display:flex; gap: 18px; flex-wrap:wrap; align-items:center;
  font-family: var(--f-mono); font-size:.75rem; color: var(--ink-soft);
  margin: 18px 0 32px; padding-bottom:18px; border-bottom:1px solid var(--line);
}
.article-meta .fiche-cote{ font-size:.75rem; }
.back-link{ font-family: var(--f-mono); font-size:.78rem; }

/* ---------- illustrations d'article (4 gabarits aléatoires) ---------- */
.article-img{ margin: 0 0 22px; }
.article-img img{ width:100%; display:block; border-radius: var(--radius); box-shadow: var(--shadow-card); }
.article-img-full{ margin: 0 0 22px; }
.article-img-full img{ aspect-ratio: 16/9; object-fit:cover; }
.article-img-float-left,
.article-img-float-right{ max-width: 280px; margin-bottom: 14px; }
.article-img-float-left{ float:left; margin-right: 20px; }
.article-img-float-right{ float:right; margin-left: 20px; }
.article-img-float-left img,
.article-img-float-right img{ aspect-ratio: 4/3; object-fit:cover; }
.article-hero img{ aspect-ratio: 21/9; object-fit:cover; }
.article-gallery{ display:grid; grid-template-columns: repeat(3,1fr); gap:12px; margin-bottom:22px; }
.article-gallery img{ width:100%; aspect-ratio: 4/3; object-fit:cover; border-radius: var(--radius); box-shadow: var(--shadow-card); }
.article-gallery-sm{ grid-template-columns: repeat(2,1fr); max-width:520px; margin-top: 26px; }
@media (max-width: 640px){
  .article-img-float-left, .article-img-float-right{ float:none; max-width:100%; margin:0 0 16px; }
  .article-gallery{ grid-template-columns: repeat(2,1fr); }
}

.two-col{ display:grid; grid-template-columns: 2fr 1fr; gap: 44px; }
@media (max-width: 860px){ .two-col{ grid-template-columns: 1fr; } }
.side-box{
  background: var(--card); border:1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-card); align-self:start;
}
.side-box h4{ font-family: var(--f-mono); text-transform:uppercase; letter-spacing:.06em; font-size:.9rem; color:var(--clay-dark); }
.side-box ul{ padding-left: 1.1em; font-size:.92rem; }
.side-box li{ margin-bottom:.5em; }

table.data{ width:100%; border-collapse: collapse; margin: 1.4em 0; font-size:.92rem; }
table.data th, table.data td{ text-align:left; padding:8px 10px; border-bottom:1px solid var(--line); }
table.data th{ font-family: var(--f-mono); font-size:.7rem; text-transform:uppercase; letter-spacing:.05em; color:var(--clay-dark); }

.org-list{ list-style:none; padding:0; display:grid; gap:10px; }
.org-list li{ background: var(--card); border:1px solid var(--line); border-radius: var(--radius); padding:14px 16px; font-family: var(--f-mono); font-size:.88rem; }

.antenne-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap:18px; }
@media (max-width: 700px){ .antenne-grid{ grid-template-columns:1fr; } }
.antenne{ background: var(--card); border:1px solid var(--line); border-radius: var(--radius); padding:18px 20px; box-shadow: var(--shadow-card); }
.antenne h4{ margin:0 0 6px; font-family: var(--f-display); }
.antenne p{ margin:0; font-size:.9rem; color: var(--ink-soft); }
.antenne .tag{ font-family: var(--f-mono); font-size:.65rem; color:var(--clay-dark); text-transform:uppercase; letter-spacing:.05em; }

/* contact form */
.contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 44px; }
@media (max-width: 860px){ .contact-grid{ grid-template-columns: 1fr; } }
.field{ margin-bottom: 16px; }
.field label{ display:block; font-family: var(--f-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.05em; color: var(--ink-soft); margin-bottom:6px; }
.field input, .field textarea{
  width:100%; font-family: var(--f-body); font-size:.95rem; padding: 11px 12px;
  border:1px solid var(--line); border-radius: var(--radius); background: var(--white); color: var(--ink);
}
.field textarea{ min-height: 130px; resize:vertical; }
.field input:focus, .field textarea:focus{ outline: 2px solid var(--clay); outline-offset:1px; }

/* footer */
footer.site-footer{ background: var(--ink); color: var(--paper-3); padding: 48px 0 26px; }
.footer-grid{ display:grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 800px){ .footer-grid{ grid-template-columns: 1fr 1fr; } }
footer.site-footer h4{ font-family: var(--f-mono); text-transform:uppercase; letter-spacing:.07em; font-size:.72rem; color: var(--white); margin-bottom:12px; }
footer.site-footer a{ color: var(--paper-3); font-size:.88rem; display:block; margin-bottom:6px; text-decoration:none; }
footer.site-footer a:hover{ color: var(--clay); }
footer.site-footer p{ font-size:.88rem; margin:0 0 6px; color: var(--paper-3); }
.footer-bottom{ margin-top: 36px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-family: var(--f-mono); font-size:.7rem; color: var(--paper-3); }

.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition: none !important; animation: none !important; }
}

/* ===== Logo CIDST dans la barre supérieure ===== */

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px 10px;
}

.brand-logo {
    height: 60px;          /* Taille sur ordinateur */
    max-height: 80%;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    transition: all 0.3s ease;
}

/* Tablettes */
@media (max-width: 768px) {
    .brand-logo {
        height: 48px;
    }
}

/* Smartphones */
@media (max-width: 480px) {
    .brand-logo {
        height: 40px;
    }
}

a {
    color: #c40000;      /* Rouge CIDST */
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: #900000;
}