/* =====================================================================
   Site de présentation — Thèse de doctorat
   Dr Doumbia Niamakolo dit Tiemoko
   Mise en page : bandeau collant, grande introduction, sections alternées
   (fond clair / fond vert profond), cartes sobres, pied de page noir et or.
   ===================================================================== */
:root {
  --vert: #1f5130;          /* vert profond de l'identité du site */
  --vert-2: #2f6c2f;        /* vert d'origine du site */
  --vert-clair: #e7f0e8;
  --encre: #15201a;         /* texte principal */
  --gris: #56625b;          /* texte secondaire */
  --ligne: #d8e0da;
  --papier: #f6f8f5;        /* fond de page */
  --blanc: #ffffff;
  --or: #e9a91b;            /* soleil / accent */
  --or-clair: #fff4d6;
  --noir: #0b0f0c;
  --f-titre: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-texte: "Public Sans", "Segoe UI", Roboto, Arial, sans-serif;
  --rayon: 10px;
  --ombre: 0 10px 30px rgba(21, 32, 26, .10);
  --largeur: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; font-family: var(--f-texte); font-size: 16px; line-height: 1.65; color: var(--encre); background: var(--papier); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--vert-2); }
h1, h2, h3 { font-family: var(--f-titre); line-height: 1.2; margin: 0; text-wrap: balance; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--or); outline-offset: 2px; }
[hidden] { display: none !important; }
.conteneur { max-width: var(--largeur); margin: 0 auto; padding-inline: 20px; }
.lien-evitement { position: absolute; left: -999px; top: 8px; background: var(--or); color: var(--noir); padding: 8px 14px; border-radius: 6px; z-index: 200; }
.lien-evitement:focus { left: 8px; }

/* ---------- Boutons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 8px; border: 2px solid transparent;
  font: 600 15px/1.2 var(--f-texte); text-decoration: none; cursor: pointer; transition: background .2s, transform .2s, box-shadow .2s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0, 0, 0, .15); }
.btn-or { background: var(--or); color: var(--noir); }
.btn-or:hover { background: #f4b832; }
.btn-vert { background: var(--vert-2); color: #fff; }
.btn-vert:hover { background: var(--vert); }
.btn-contour { border-color: currentColor; color: var(--vert-2); background: transparent; }
.btn-clair { border-color: rgba(255, 255, 255, .7); color: #fff; background: transparent; }
.btn-clair:hover { background: rgba(255, 255, 255, .12); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- En-tête ---------- */
.entete { position: sticky; top: 0; z-index: 100; background: rgba(21, 32, 26, .96); color: #fff; backdrop-filter: blur(6px);
  border-bottom: 3px solid var(--or); }
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.marque { display: flex; align-items: center; gap: 12px; color: #fff; text-decoration: none; }
.marque .sigle { width: 40px; height: 40px; border-radius: 50%; background: var(--or); color: var(--noir); display: grid; place-items: center;
  font: 700 16px var(--f-titre); flex: none; }
.marque strong { display: block; font: 600 16px/1.2 var(--f-titre); }
.marque-sous { display: block; font-size: 12px; color: #c9d6cc; letter-spacing: .04em; }
.menu ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 2px; }
.menu a { display: block; padding: 8px 12px; border-radius: 6px; color: #e8efe9; text-decoration: none; font-size: 15px; font-weight: 500; }
.menu a:hover, .menu a.actif { background: rgba(255, 255, 255, .1); color: var(--or); }
.bouton-menu { display: none; background: none; border: 1px solid rgba(255, 255, 255, .4); color: #fff; border-radius: 6px; padding: 8px 10px; cursor: pointer; }
@media (max-width: 900px) {
  .bouton-menu { display: inline-flex; }
  .menu { position: absolute; top: 100%; left: 0; right: 0; background: var(--noir); display: none; border-bottom: 3px solid var(--or); }
  .menu.ouvert { display: block; }
  .menu ul { flex-direction: column; padding: 8px 12px 14px; }
  .menu a { padding: 12px; }
  .marque-sous { display: none; }
  .marque strong { font-size: 15px; }
  .texte p { text-align: left; }
}

/* ---------- Présentation (grand bandeau) ---------- */
.hero { background: linear-gradient(160deg, #15201a 0%, #1f5130 58%, #2f6c2f 100%); color: #fff; overflow: hidden; }
.hero .conteneur { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 48px; align-items: center; padding-block: 64px 72px; }
.surtitre { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--or); margin-bottom: 14px; }
.hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.9rem); font-weight: 600; margin-bottom: 18px; }
.hero .auteur { font-size: 1.1rem; color: #fff; margin-bottom: 4px; font-weight: 600; }
.hero .ecole { color: #c9d6cc; margin-bottom: 28px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .capture { background: #fff; border-radius: 12px; padding: 10px; box-shadow: 0 24px 60px rgba(0, 0, 0, .35); transform: rotate(1.2deg); }
.hero .capture img { border-radius: 6px; }
.chiffres { background: var(--blanc); border-bottom: 1px solid var(--ligne); }
.chiffres .conteneur { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
.chiffre { padding: 22px 18px; border-left: 1px solid var(--ligne); }
.chiffre:first-child { border-left: 0; }
.chiffre b { display: block; font: 600 1.7rem/1.1 var(--f-titre); color: var(--vert); }
.chiffre span { font-size: 14px; color: var(--gris); }
@media (max-width: 860px) {
  .hero .conteneur { grid-template-columns: minmax(0, 1fr); padding-block: 44px 52px; }
  .hero .capture { transform: none; max-width: 480px; }
  .chiffres .conteneur { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chiffre:nth-child(3) { border-left: 0; }
  .chiffre:nth-child(n+3) { border-top: 1px solid var(--ligne); }
}

/* ---------- Sections ---------- */
.section { padding-block: 72px; }
.section.alt { background: var(--blanc); }
.section.sombre { background: var(--vert); color: #fff; }
.titre-section { max-width: 760px; margin-bottom: 36px; }
.titre-section .surtitre { color: var(--vert-2); }
.sombre .titre-section .surtitre { color: var(--or); }
.titre-section h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); font-weight: 600; margin-bottom: 10px; }
.titre-section p { color: var(--gris); font-size: 1.05rem; margin: 0; }
.sombre .titre-section p { color: #cfdcd2; }
.retour { display: inline-block; margin-top: 28px; font-size: 14px; color: var(--gris); }
.sombre .retour { color: #cfdcd2; }

/* Texte courant */
.texte { max-width: 72ch; }
.texte p { text-align: justify; hyphens: auto; }
.deux-colonnes { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 48px; align-items: start; }
.encadre { background: var(--vert-clair); border-left: 4px solid var(--vert-2); border-radius: var(--rayon); padding: 22px 24px; }
.encadre h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--vert); }
.encadre p:last-child { margin: 0; }
@media (max-width: 860px) { .deux-colonnes { grid-template-columns: minmax(0, 1fr); gap: 28px; } }

/* Cartes */
.grille { display: grid; gap: 20px; }
.grille-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grille-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 960px) { .grille-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px) { .grille-2, .grille-3 { grid-template-columns: minmax(0, 1fr); } }
.carte { background: var(--blanc); border: 1px solid var(--ligne); border-radius: var(--rayon); padding: 24px; min-width: 0; display: flex; flex-direction: column; }
.carte h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--vert); }
.carte p { color: var(--gris); }
.carte .pied { margin-top: auto; padding-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.carte .etiquette { align-self: flex-start; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--vert-2);
  background: var(--vert-clair); padding: 3px 10px; border-radius: 999px; margin-bottom: 12px; }
.liste { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.liste li { position: relative; padding-left: 26px; }
.liste li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 10px; height: 10px; border-radius: 50%; background: var(--or); box-shadow: 0 0 0 3px var(--or-clair); }
.liste ul { list-style: none; padding: 6px 0 0; margin: 0; display: grid; gap: 4px; color: var(--gris); }
.liste ul li { padding-left: 18px; }
.liste ul li::before { width: 8px; height: 2px; border-radius: 0; top: .8em; left: 2px; background: var(--vert-2); box-shadow: none; }

/* Résultats numérotés */
.resultats { counter-reset: r; display: grid; gap: 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 760px) { .resultats { grid-template-columns: minmax(0, 1fr); } }
.resultat { background: var(--blanc); border: 1px solid var(--ligne); border-radius: var(--rayon); padding: 22px 22px 22px 70px; position: relative; }
.resultat::before { counter-increment: r; content: counter(r); position: absolute; left: 20px; top: 20px; width: 34px; height: 34px; border-radius: 50%;
  background: var(--vert); color: #fff; display: grid; place-items: center; font: 600 16px var(--f-titre); }
.resultat h3 { font-size: 1.1rem; margin-bottom: 8px; }
.resultat p, .resultat ul { color: var(--gris); margin: 0; }
.resultat ul { padding-left: 18px; margin-top: 6px; }

/* Galerie de la plateforme */
.galerie { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: stretch; }
@media (max-width: 900px) { .galerie { grid-template-columns: minmax(0, 1fr); } }
.vignette { margin: 0; background: var(--blanc); border: 1px solid var(--ligne); border-radius: var(--rayon); overflow: hidden; display: flex; flex-direction: column; }
.vignette button { display: flex; align-items: center; justify-content: center; width: 100%; aspect-ratio: 16 / 10; padding: 8px; border: 0;
  border-bottom: 1px solid var(--ligne); background: #eef2ef; cursor: zoom-in; overflow: hidden; }
.vignette img { width: 100%; height: 100%; object-fit: contain; transition: transform .3s; }
.vignette button:hover img { transform: scale(1.03); }
.vignette figcaption { padding: 12px 16px; font-size: 14px; color: var(--gris); }
.vignette figcaption b { display: block; color: var(--encre); font-size: 15px; }

/* Application intégrée */
.app-barre { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.app-cadre { border-radius: 12px; overflow: hidden; background: #eef1f6; box-shadow: 0 24px 60px rgba(0, 0, 0, .35); border: 1px solid rgba(255, 255, 255, .25); }
.app-cadre iframe { display: block; width: 100%; height: 86vh; min-height: 620px; border: 0; }
.app-etapes { margin-top: 24px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 860px) { .app-etapes { grid-template-columns: minmax(0, 1fr); } }
.app-etape { background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18); border-radius: var(--rayon); padding: 16px 18px; font-size: 15px; color: #e5ede7; }
.app-etape b { display: block; color: var(--or); font-family: var(--f-titre); font-size: 1.05rem; margin-bottom: 4px; }

/* Publication */
.publication { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); gap: 28px; align-items: center; background: var(--blanc);
  border: 1px solid var(--ligne); border-radius: 14px; padding: 32px; box-shadow: var(--ombre); }
@media (max-width: 860px) { .publication { grid-template-columns: minmax(0, 1fr); padding: 22px; } }
.publication h3 { font-size: 1.35rem; margin-bottom: 10px; }
.publication .revue { color: var(--gris); margin-bottom: 18px; }
.publication .actions { display: flex; flex-wrap: wrap; gap: 10px; }
.certificat { margin: 0; border: 1px solid var(--ligne); border-radius: var(--rayon); overflow: hidden; background: #fff; }
.certificat button { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; }
.certificat figcaption { padding: 10px 14px; font-size: 13px; color: var(--gris); text-align: center; }

/* Documents */
.doc-icone { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; background: var(--vert-clair); color: var(--vert-2); margin-bottom: 14px; }
.doc-icone svg { width: 24px; height: 24px; }
.doc-liens { list-style: none; padding: 0; margin: 0 0 4px; display: grid; gap: 8px; }
.doc-liens a { display: flex; justify-content: space-between; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--ligne);
  border-radius: 8px; text-decoration: none; color: var(--encre); font-weight: 500; font-size: 15px; transition: border-color .2s, background .2s; }
.doc-liens a:hover { border-color: var(--vert-2); background: var(--vert-clair); }
.doc-liens small { color: var(--gris); font-weight: 400; white-space: nowrap; }

/* Contact */
.contact { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 40px; align-items: start; }
@media (max-width: 860px) { .contact { grid-template-columns: minmax(0, 1fr); } }
.formulaire { background: var(--blanc); border: 1px solid var(--ligne); border-radius: 14px; padding: 28px; box-shadow: var(--ombre); display: grid; gap: 14px; }
.champ { display: grid; gap: 6px; }
.champ label { font-weight: 600; font-size: 14px; }
.champ input, .champ textarea { width: 100%; font: inherit; padding: 11px 13px; border: 1px solid #c3cdc6; border-radius: 8px; background: #fbfcfb; color: var(--encre); }
.champ input:focus, .champ textarea:focus { outline: none; border-color: var(--vert-2); box-shadow: 0 0 0 3px rgba(47, 108, 47, .18); }
.formulaire .ligne { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .formulaire .ligne { grid-template-columns: 1fr; } }
.formulaire .boutons { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; align-items: center; }
.message-ok { background: var(--vert-clair); color: var(--vert); border-radius: 8px; padding: 12px 14px; font-weight: 600; margin: 0; }
.lien-discret { background: none; border: 0; color: var(--gris); text-decoration: underline; cursor: pointer; font: inherit; font-size: 14px; }

/* Pied de page */
.pied-page { background: var(--noir); color: #b9c3bc; padding-block: 36px 28px; }
.pied-page .conteneur { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; align-items: center; }
.pied-page .credit { color: var(--or); font-weight: 600; max-width: 70ch; }
.pied-page a { color: #e8efe9; }
.pied-page small { display: block; margin-top: 4px; }

/* Visionneuse (vidéos, images) */
#viewer { position: fixed; inset: 0; background: rgba(5, 8, 6, .82); display: flex; align-items: center; justify-content: center; padding: 16px;
  opacity: 0; pointer-events: none; transition: opacity .25s ease; z-index: 1000; }
#viewer.open { opacity: 1; pointer-events: auto; }
#viewer-content { background: #fff; border-radius: 12px; width: 100%; max-width: 980px; max-height: 92vh; display: flex; flex-direction: column; overflow: hidden;
  transform: scale(.96); transition: transform .25s ease; }
#viewer.open #viewer-content { transform: scale(1); }
#viewer-header { background: var(--vert); color: #fff; padding: 12px 18px; display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
#viewer-header button { background: none; border: 0; color: #fff; font-size: 1.6em; line-height: 1; cursor: pointer; }
#viewer-body { background: #000; overflow: auto; }
#viewer-body iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; }
#viewer-body img { margin: 0 auto; max-height: 82vh; width: auto; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}
@media print {
  .entete, .app-barre, .app-cadre, .app-etapes, #viewer, .formulaire { display: none !important; }
  .hero, .section.sombre { background: #fff; color: #000; }
}

/* Communications scientifiques */
.communication h3 { font-size: 1.12rem; line-height: 1.35; }
.communication .evenement { color: var(--gris); font-size: 15px; }
.communication .evenement b { color: var(--encre); }
.resume { margin: 4px 0 16px; border: 1px solid var(--ligne); border-radius: 8px; background: var(--papier); }
.resume summary { cursor: pointer; padding: 10px 14px; font-weight: 600; color: var(--vert-2); list-style: none; }
.resume summary::-webkit-details-marker { display: none; }
.resume summary::before { content: "+"; display: inline-block; width: 1.2em; font-weight: 700; }
.resume[open] summary::before { content: "−"; }
.resume p { padding: 0 14px; margin: 0 0 10px; font-size: 15px; text-align: justify; hyphens: auto; }
.resume .source { font-size: 13px; color: var(--gris); text-align: left; }
.communication .doc-liens { margin-bottom: 0; }
#communications .grille { align-items: start; }
.communication .motscles { font-size: 14px; color: var(--gris); }
.actions-article { display: flex; flex-wrap: wrap; gap: 10px; margin: 2px 0 14px; }
.video-demo { width: 100%; aspect-ratio: 16 / 9; border-radius: 8px; background: #000; margin: 4px 0 12px; display: block; }
#viewer-body video { display: block; width: 100%; max-height: 82vh; background: #000; }
.small-note { font-size: 13px; color: var(--gris); margin: 10px 0 0; }

/* Documents gérés depuis gestion_documents.php : la grille s'adapte au nombre de cartes */
.grille-1 { grid-template-columns: minmax(0, 640px); justify-content: center; }
.doc-liens-pub { margin-top: 16px; }
.carte .actions-article { margin-top: 2px; }
.carte .doc-liens + .small-note { margin-top: 10px; }
.liens-admin { display: inline-flex; flex-wrap: wrap; gap: 4px 14px; }