/* LIBRETECH – styles du site (Bootstrap 5.3 + variables de marque) */

/* Polices hébergées en local (licence OFL, voir assets/fonts/LICENCES-OFL.txt), sous-ensemble « latin » (accents français inclus) */
@font-face { font-family: "Space Grotesk"; src: url("../fonts/space-grotesk-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("../fonts/space-grotesk-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("../fonts/inter-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("../fonts/inter-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/jetbrains-mono-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }

:root {
  --lt-green: #22C55E;
  --lt-green-hover: #4ADE80;
  --lt-green-text: #15803D;      /* vert lisible sur fond clair (contraste ≥ 4,5:1) */
  --lt-navy: #0F172A;
  --lt-cyan: #06B6D4;
  --lt-orange: #F97316;
  --lt-gray: #F1F5F9;
  --lt-surface: #FFFFFF;
  --lt-border: #E2E8F0;
  --lt-link: var(--lt-green-text);
  --bs-secondary-color: #475569;   /* texte secondaire : contraste ≥ 7:1 sur blanc, ≥ 6:1 sur gris clair */
  --font-title: "Space Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bs-body-font-family: var(--font-body);
  --bs-body-color: var(--lt-navy);
  --bs-link-color: var(--lt-link);
  --bs-link-hover-color: var(--lt-navy);
  --bs-code-font-family: var(--font-mono);
}

[data-bs-theme="dark"] {
  --lt-gray: #111C33;
  --lt-surface: #111C33;
  --lt-border: #1E2B47;
  --lt-link: #4ADE80;
  --bs-body-bg: #0F172A;
  --bs-body-bg-rgb: 15, 23, 42;
  --bs-body-color: #E2E8F0;
  --bs-body-color-rgb: 226, 232, 240;
  --bs-secondary-color: rgba(203, 213, 225, .78);
  --bs-border-color: #1E2B47;
  --bs-link-hover-color: #FFFFFF;
}

body { font-family: var(--font-body); }
strong, b { font-weight: 600; }
h1, h2, h3, h4, h5, .hero-title, .navbar-brand { font-family: var(--font-title); letter-spacing: -.01em; }
h1, h2, h3, h4, h5, h6 { scroll-margin-top: 5.5rem; }
a { text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--lt-cyan); outline-offset: 2px; }

.skip-link { position: absolute; left: .5rem; top: .5rem; z-index: 2000; background: var(--lt-green); color: var(--lt-navy); padding: .5rem 1rem; border-radius: .375rem; }

/* Boutons */
.btn-lt { --bs-btn-bg: var(--lt-green); --bs-btn-color: var(--lt-navy); --bs-btn-border-color: var(--lt-green);
  --bs-btn-hover-bg: var(--lt-green-hover); --bs-btn-hover-color: var(--lt-navy); --bs-btn-hover-border-color: var(--lt-green-hover);
  --bs-btn-active-bg: var(--lt-green-hover); --bs-btn-active-color: var(--lt-navy); font-weight: 600; }
.btn-outline-lt { --bs-btn-color: var(--lt-navy); --bs-btn-border-color: var(--lt-navy);
  --bs-btn-hover-bg: var(--lt-navy); --bs-btn-hover-color: #fff; --bs-btn-hover-border-color: var(--lt-navy);
  --bs-btn-active-bg: var(--lt-navy); --bs-btn-active-color: #fff; font-weight: 600; }
[data-bs-theme="dark"] .btn-outline-lt { --bs-btn-color: #E2E8F0; --bs-btn-border-color: #475569;
  --bs-btn-hover-bg: var(--lt-green); --bs-btn-hover-color: var(--lt-navy); --bs-btn-hover-border-color: var(--lt-green); }
.btn-icon { border: 1px solid var(--lt-border); color: inherit; width: 2.5rem; height: 2.5rem; padding: 0; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; background: transparent; }
.btn-icon:hover { border-color: var(--lt-green); }
.icon-sun { display: none; }
[data-bs-theme="dark"] .icon-sun { display: inline-flex; }
[data-bs-theme="dark"] .icon-moon { display: none; }

/* En-tête */
.site-header { background: var(--bs-body-bg); border-bottom: 1px solid var(--lt-border); z-index: 1030; }
.wordmark { font-family: var(--font-title); font-weight: 700; font-size: 1.45rem; letter-spacing: .02em; color: var(--bs-body-color); }
.wordmark span { color: var(--lt-green); }
.navbar .nav-link { font-weight: 600; color: var(--bs-body-color); padding-inline: .9rem; }
.navbar .nav-link:hover { color: var(--lt-link); }
.navbar .nav-link.active { color: var(--lt-link); box-shadow: inset 0 -3px 0 var(--lt-green); }
@media (max-width: 991.98px) { .navbar .nav-link.active { box-shadow: inset 3px 0 0 var(--lt-green); } }

/* Hero */
.hero { background: linear-gradient(135deg, var(--lt-navy) 0%, #14304A 100%); color: #fff; }
.hero-kicker { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .12em; font-size: .85rem; color: var(--lt-green); margin-bottom: .75rem; }
.hero-title { font-weight: 700; font-size: clamp(2.1rem, 5.5vw, 3.6rem); line-height: 1.05; margin-bottom: 1rem; }
.hero-lead { font-size: 1.15rem; color: #CBD5E1; max-width: 36rem; margin-bottom: 1.75rem; }
.hero .btn-outline-lt { --bs-btn-color: #fff; --bs-btn-border-color: rgba(255,255,255,.5); --bs-btn-hover-bg: #fff; --bs-btn-hover-color: var(--lt-navy); --bs-btn-hover-border-color: #fff; }
.card-une { background: var(--lt-surface); color: var(--bs-body-color); border: 0; border-radius: .75rem; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.une-label { background: var(--lt-orange); color: #0F172A; font-weight: 700; font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; padding: .15rem .5rem; border-radius: .25rem; }

/* Sections */
.section { padding-block: 2.5rem; }
.section-alt { background: var(--lt-gray); padding-block: 2.5rem; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
.section-head h2 { font-size: 1.6rem; margin: 0; position: relative; padding-left: .85rem; }
.section-head h2::before { content: ""; position: absolute; left: 0; top: .2em; bottom: .2em; width: 4px; border-radius: 2px; background: var(--lt-green); }
.section-head a { font-weight: 600; font-size: .95rem; }
.empty-state { padding: 3rem 1rem; text-align: center; color: var(--bs-secondary-color); background: var(--lt-gray); border-radius: .75rem; }
.breadcrumb { --bs-breadcrumb-divider-color: var(--bs-secondary-color); font-size: .875rem; margin-bottom: 0; }
.page-head h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 700; }

/* Cartes */
.card-contenu, .card-event { background: var(--lt-surface); border: 1px solid var(--lt-border); border-radius: .75rem; overflow: hidden;
  box-shadow: 0 1px 2px rgba(15,23,42,.05); transition: transform .18s ease, box-shadow .18s ease; }
.card-contenu:hover, .card-event:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(15,23,42,.12); }
.card-media { position: relative; display: block; background: var(--lt-gray); }
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-placeholder { background: linear-gradient(135deg, var(--lt-navy), #134E4A 60%, var(--lt-green)); }
.badge-play { position: absolute; inset: auto .75rem .75rem auto; width: 2.6rem; height: 2.6rem; border-radius: 50%; background: var(--lt-green); color: var(--lt-navy); display: inline-flex; align-items: center; justify-content: center; box-shadow: 0 2px 8px rgba(0,0,0,.35); }
.card-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; font-size: .8rem; }
.tag-rubrique { position: relative; z-index: 2; font-weight: 700; font-size: .74rem; text-transform: uppercase; letter-spacing: .05em; color: var(--lt-link); text-decoration: none; }
.tag-rubrique:hover { text-decoration: underline; }
.card-title a, .card-event h3 a { color: var(--bs-body-color); text-decoration: none; }
.card-title a:hover, .card-event h3 a:hover { color: var(--lt-link); }
.event-date { width: 3.6rem; padding: .4rem 0; border-radius: .5rem; background: var(--lt-navy); color: #fff; line-height: 1.1; }
.event-day { display: block; font-family: var(--font-title); font-size: 1.5rem; font-weight: 700; color: var(--lt-green); }
.event-month { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; }

/* Recherche */
.recherche-form { gap: .4rem; margin-left: auto; max-width: 20rem; }
.recherche-form .form-control { min-width: 0; }
@media (max-width: 991.98px) { .recherche-form { max-width: none; margin: .75rem 0 .5rem; } }

/* Sommaire des articles */
.toc { background: var(--lt-gray); border-left: 4px solid var(--lt-green); border-radius: 0 .5rem .5rem 0; padding: 1rem 1.25rem; font-size: .98rem; }
.toc-titre { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; color: var(--bs-secondary-color); }
.toc li { margin: .25rem 0; }
.toc .toc-n3 { padding-left: 1.1rem; font-size: .93rem; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }
mark.a-completer { background: #FEF3C7; color: #92400E; padding: 0 .25rem; border-radius: .2rem; }

/* Newsletter */
.newsletter-bloc { background: var(--lt-gray); border: 1px solid var(--lt-border); border-left: 5px solid var(--lt-green); border-radius: .75rem; padding: 1.75rem; }
.newsletter-carte { background: var(--lt-surface); border: 1px solid var(--lt-border); border-radius: .75rem; }
.champ-piege { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Popup vidéo */
.video-open { display: block; color: inherit; text-decoration: none; }
.video-open img, .video-open .card-placeholder { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-open .badge-play { transition: transform .18s ease; }
.video-open:hover .badge-play, .video-open:focus-visible .badge-play { transform: scale(1.12); }
#modal-video .modal-content { background: #0B1220; color: #E2E8F0; border: 0; }
#modal-video .modal-header, #modal-video .modal-footer { border-color: #1E2B47; }
#modal-video .btn-close { filter: invert(1) grayscale(1) brightness(2); }
#modal-video .modal-footer a { color: var(--lt-green-hover); }
.video-cadre iframe { border: 0; }

/* Filtres / pagination */
.filtres .nav-link { color: var(--bs-body-color); border: 1px solid var(--lt-border); margin-right: .4rem; }
.filtres .nav-link.active { background: var(--lt-green); color: var(--lt-navy); border-color: var(--lt-green); font-weight: 600; }
.pagination { --bs-pagination-active-bg: var(--lt-green); --bs-pagination-active-border-color: var(--lt-green); --bs-pagination-active-color: var(--lt-navy); --bs-pagination-color: var(--bs-body-color); }

/* Articles */
.article-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; line-height: 1.15; }
.article-image { width: 100%; }
.article-body { font-size: 1.08rem; line-height: 1.75; }
.article-body h2 { font-size: 1.6rem; margin-top: 2.2rem; }
.article-body h3 { font-size: 1.3rem; margin-top: 1.8rem; }
.article-body img { max-width: 100%; height: auto; border-radius: .5rem; }
.article-body blockquote { border-left: 4px solid var(--lt-green); padding: .25rem 1rem; color: var(--bs-secondary-color); background: var(--lt-gray); border-radius: 0 .5rem .5rem 0; }
.article-body pre, .article-body code { font-family: var(--font-mono); font-size: .92em; }
.article-body pre { background: var(--lt-navy); color: #E2E8F0; padding: 1rem; border-radius: .5rem; overflow-x: auto; }
.video-frame { border-radius: .75rem; overflow: hidden; background: #000; }
.podcast-box, .auteur-box, .sources { background: var(--lt-gray); border-radius: .75rem; padding: 1rem 1.25rem; }
.event-infos li { display: flex; gap: .6rem; align-items: flex-start; margin-bottom: .5rem; }
.event-infos svg { flex-shrink: 0; margin-top: .2rem; color: var(--lt-link); }

/* Pied de page */
.site-footer { background: var(--lt-navy); color: #CBD5E1; }
.site-footer a { color: #E2E8F0; text-decoration: none; }
.site-footer a:hover { color: var(--lt-green); text-decoration: underline; }
.site-footer .text-body-secondary { color: #94A3B8 !important; }
.site-footer .wordmark { color: #fff; }
.footer-title { font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; color: var(--lt-green); margin-bottom: .75rem; font-family: var(--font-mono); }
.site-footer li { margin-bottom: .4rem; }
.site-footer hr { border-color: #1E2B47; opacity: 1; }

/* Animations légères, désactivées si l'utilisateur le demande */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .card-contenu:hover, .card-event:hover { transform: none; }
}