/* ===== VARIABLES & RESET ===== */
        :root {
            --bg:         #0f0e0c;
            --bg-card:    #111827;
            --bg-alt:     #0f1a2e;
            --bg-hover:   #1a2640;
            --texte:      #e2e8f0;
            --texte-doux: #8fa3bf;
            --bordure:    rgba(255,255,255,.08);
            --bordure-m:  rgba(255,255,255,.14);
            --rayon:      10px;
            --rayon-lg:   14px;
            --logo:   #0078D4;

            /* Couleurs catégories */
            --c-windows:  #3B82F6;
            --c-reseau:   #22C55E;
            --c-cyber:    #A855F7;
            --c-bureau:   #F97316;
            --c-depann:   #64748B;
            --c-forma:    #06B6D4;

            --font-titre: 'JetBrains Mono', monospace;
            --font-corps: 'Outfit', sans-serif;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-corps);
            background: var(--bg);
            color: var(--texte);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
        }

        a { color: inherit; text-decoration: none; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }

        /* ===== HEADER ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--bordure-m);
            position: sticky; top: 0; z-index: 200;
            backdrop-filter: blur(10px);
        }

        .header-inner {
            max-width: 1240px; margin: 0 auto;
            padding: 0 1.5rem;
            height: 62px;
            display: flex; align-items: center; gap: 2rem;
        }

        .logo {
            font-family: var(--font-titre);
            font-size: 1.25rem; font-weight: 700;
            white-space: nowrap; flex-shrink: 0;
            letter-spacing: -.02em;
        }
        .logo-point { color: var(--c-windows); }
        .logo-fr    { color: var(--texte-doux); font-weight: 500; }

        .logo span { color: #0078D4; }

        /* Nav */
        .nav-principale { display: flex; align-items: center; gap: .25rem; flex: 1; }

        .nav-lien {
            padding: .35rem .7rem;
            border-radius: 6px;
            font-size: .875rem; font-weight: 600;
            color: var(--texte-doux);
            transition: background .18s, color .18s;
            white-space: nowrap;
            border-bottom: 2px solid transparent;
        }
        .nav-lien:hover { background: var(--bg-hover); color: var(--texte); }

        /* couleur par catégorie au hover */
        .nav-lien[data-cat="windows"]:hover    { color: var(--c-windows); }
        .nav-lien[data-cat="reseau"]:hover     { color: var(--c-reseau); }
        .nav-lien[data-cat="cyber"]:hover      { color: var(--c-cyber); }
        .nav-lien[data-cat="bureau"]:hover     { color: var(--c-bureau); }
        .nav-lien[data-cat="depann"]:hover     { color: var(--c-depann); }
        .nav-lien[data-cat="forma"]:hover      { color: var(--c-forma); }

        /* Recherche */
        .recherche {
            display: flex; align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--bordure-m);
            border-radius: var(--rayon);
            padding: .3rem .75rem;
            gap: .5rem;
            flex-shrink: 0;
        }
        .recherche input {
            background: none; border: none; outline: none;
            color: var(--texte); font-family: var(--font-corps);
            font-size: .875rem; width: 180px;
        }
        .recherche input::placeholder { color: var(--texte-doux); }
        .recherche svg { flex-shrink: 0; opacity: .5; }

        /* ===== PAGE LAYOUT ===== */
        .page-wrapper {
            max-width: 1240px; margin: 0 auto;
            padding: 2rem 1.5rem 3rem;
            display: grid;
            grid-template-columns: 1fr 290px;
            grid-template-rows: auto auto auto;
            gap: 0 2rem;
        }

        .contenu-principal { min-width: 0; }
        .sidebar {
            grid-row: 1 / 5;
            grid-column: 2;
            display: flex; flex-direction: column; gap: 1.25rem;
            align-self: start;
            position: sticky; top: 78px;
        }

        /* ===== HERO ===== */
        .hero {
            background: linear-gradient(135deg, #111c30 0%, #0e1827 100%);
            border: 1px solid var(--bordure-m);
            border-radius: var(--rayon-lg);
            padding: 2.5rem 2rem;
            margin-bottom: 2.5rem;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute; top: -40px; right: -40px;
            width: 200px; height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59,130,246,.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-tag {
            display: inline-block;
            font-family: var(--font-titre);
            font-size: .72rem; font-weight: 700;
            letter-spacing: .08em; text-transform: uppercase;
            color: var(--c-windows);
            background: rgba(59,130,246,.12);
            border: 1px solid rgba(59,130,246,.3);
            border-radius: 4px;
            padding: .25rem .65rem;
            margin-bottom: 1rem;
        }
        .hero h1 {
            font-size: 2.1rem; font-weight: 700; line-height: 1.2;
            margin-bottom: .75rem;
            letter-spacing: -.02em;
        }
        .hero h1 em {
            font-style: normal;
            color: var(--c-windows);
            font-family: var(--font-titre);
        }
        .hero-desc {
            color: var(--texte-doux); font-size: 1rem;
            max-width: 520px; margin-bottom: 1.75rem;
            line-height: 1.7;
        }
        .btn-hero {
            display: inline-flex; align-items: center; gap: .5rem;
            background: var(--c-windows);
            color: #fff; font-weight: 700; font-size: .9rem;
            padding: .6rem 1.4rem;
            border-radius: var(--rayon);
            transition: opacity .2s, transform .15s;
        }
        .btn-hero:hover { opacity: .88; transform: translateY(-1px); }
        .btn-hero svg { flex-shrink: 0; }

        /* ===== TITRE DE SECTION ===== */
        .section-titre {
            font-family: var(--font-titre);
            font-size: .8rem; font-weight: 700;
            letter-spacing: .06em; text-transform: uppercase;
            color: var(--texte-doux);
            margin-bottom: 1.1rem;
            display: flex; align-items: center; gap: .6rem;
        }
        .section-titre::after {
            content: '';
            flex: 1; height: 1px;
            background: var(--bordure-m);
        }

        /* ===== GRILLE CATÉGORIES ===== */
        .section-categories { margin-bottom: 2.5rem; }

        .grille-categories {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: .875rem;
        }

        .carte-cat {
            background: var(--bg-card);
            border: 1px solid var(--bordure);
            border-radius: var(--rayon-lg);
            padding: 1.1rem 1.1rem .9rem;
            display: flex; flex-direction: column; gap: .5rem;
            transition: transform .18s, border-color .18s, background .18s;
            cursor: pointer;
        }
        .carte-cat:hover {
            transform: translateY(-2px);
            background: var(--bg-hover);
            border-color: var(--bordure-m);
        }
        .carte-cat-pastille {
            width: 34px; height: 34px; border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .carte-cat-label {
            font-weight: 700; font-size: .95rem;
            color: var(--texte);
        }
        .carte-cat-desc {
            font-size: .8rem; color: var(--texte-doux); line-height: 1.4;
        }

        /* ===== GRILLE ARTICLES ===== */
        .section-articles { margin-bottom: 2.5rem; }

        .grille-articles {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: .875rem;
        }

        .carte-article {
            background: var(--bg-card);
            border: 1px solid var(--bordure);
            border-radius: var(--rayon-lg);
            padding: 1.1rem 1.1rem .9rem;
            border-left-width: 3px;
            transition: transform .18s, background .18s;
            display: flex; flex-direction: column; gap: .5rem;
        }
        .carte-article:hover { transform: translateY(-2px); background: var(--bg-hover); }

        .carte-article-badge {
            font-family: var(--font-titre);
            font-size: .68rem; font-weight: 700;
            letter-spacing: .06em; text-transform: uppercase;
            padding: .2rem .55rem; border-radius: 4px;
            display: inline-block; align-self: flex-start;
        }
        .carte-article h3 {
            font-size: .95rem; font-weight: 700;
            line-height: 1.35;
            color: var(--texte);
        }
        .carte-article p { font-size: .83rem; color: var(--texte-doux); line-height: 1.5; }

        /* ===== SECTION FORMATIONS ===== */
        .section-formations {
            background: rgba(6,182,212,.07);
            border: 1px solid rgba(6,182,212,.25);
            border-radius: var(--rayon-lg);
            padding: 1.75rem;
            margin-bottom: 2rem;
        }
        .formations-inner { display: flex; gap: 2rem; align-items: flex-start; }
        .formations-texte { flex: 1; }
        .formations-texte h2 {
            font-size: 1.15rem; font-weight: 700;
            color: var(--c-forma); margin-bottom: .6rem;
        }
        .formations-texte p { font-size: .9rem; color: var(--texte-doux); margin-bottom: 1.1rem; line-height: 1.6; }
        .btn-forma {
            display: inline-flex; align-items: center; gap: .4rem;
            background: var(--c-forma);
            color: #000; font-weight: 700; font-size: .87rem;
            padding: .5rem 1.2rem; border-radius: var(--rayon);
            transition: opacity .2s;
        }
        .btn-forma:hover { opacity: .85; }

        .formations-liste { flex: 1; display: flex; flex-direction: column; gap: .5rem; }
        .forma-item {
            background: rgba(6,182,212,.06);
            border: 1px solid rgba(6,182,212,.18);
            border-radius: var(--rayon);
            padding: .65rem .9rem;
            display: flex; justify-content: space-between; align-items: center;
            font-size: .88rem;
            transition: background .18s;
        }
        .forma-item:hover { background: rgba(6,182,212,.14); }
        .forma-item-label { color: var(--texte); font-weight: 600; }
        .forma-item-meta { color: var(--c-forma); font-size: .78rem; font-family: var(--font-titre); }

        /* ===== SIDEBAR ===== */
        .sidebar-bloc {
            background: var(--bg-card);
            border: 1px solid var(--bordure);
            border-radius: var(--rayon-lg);
            padding: 1.1rem;
        }
        .sidebar-titre {
            font-family: var(--font-titre);
            font-size: .72rem; font-weight: 700;
            letter-spacing: .07em; text-transform: uppercase;
            color: var(--texte-doux);
            margin-bottom: .85rem;
            padding-bottom: .6rem;
            border-bottom: 1px solid var(--bordure);
        }

        .sidebar-cats { display: flex; flex-direction: column; gap: .2rem; }
        .sidebar-cat-lien {
            display: flex; align-items: center; gap: .6rem;
            padding: .4rem .6rem;
            border-radius: 6px;
            font-size: .875rem; color: var(--texte-doux);
            font-weight: 600;
            transition: background .15s, color .15s;
        }
        .sidebar-cat-lien:hover { background: var(--bg-hover); color: var(--texte); }
        .sidebar-cat-dot {
            width: 8px; height: 8px; border-radius: 50%;
            flex-shrink: 0;
        }

        .sidebar-liste { display: flex; flex-direction: column; }
        .sidebar-liste li {
            padding: .45rem 0;
            border-bottom: 1px solid var(--bordure);
        }
        .sidebar-liste li:last-child { border-bottom: none; }
        .sidebar-liste a { font-size: .83rem; color: var(--texte-doux); line-height: 1.4; display: block; }
        .sidebar-liste a:hover { color: var(--texte); }

        .logo {
      font-family: 'Syne', sans-serif;
      font-size: 1.4rem;
      font-weight: 800;
      color: #fff;
      letter-spacing: -0.02em;
      white-space: nowrap;
    }
    .logo span { color: #0078D4; }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--bordure);
            margin-top: 2rem;
        }
        .footer-inner {
            max-width: 1240px; margin: 0 auto;
            padding: 2.5rem 1.5rem;
            display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem;
        }
        .footer-logo-txt {
            font-family: var(--font-titre);
            font-size: 1.2rem; font-weight: 700;
            margin-bottom: .6rem;
        }
        .footer-logo-txt span { color: var(--c-windows); }
        .footer-intro { font-size: .85rem; color: var(--texte-doux); line-height: 1.6; }
        .footer-col h3 {
            font-size: .8rem; font-weight: 700;
            letter-spacing: .05em; text-transform: uppercase;
            color: var(--texte-doux);
            margin-bottom: .75rem;
        }
        .footer-col ul li { margin-bottom: .35rem; }
        .footer-col a { font-size: .85rem; color: var(--texte-doux); transition: color .15s; }
        .footer-col a:hover { color: var(--texte); }
        .footer-bas {
            text-align: center; padding: 1rem 1.5rem;
            border-top: 1px solid var(--bordure);
            font-size: .8rem; color: var(--texte-doux);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 960px) {
            .page-wrapper { grid-template-columns: 1fr; }
            .sidebar { grid-row: auto; grid-column: auto; position: static; }
            .grille-categories { grid-template-columns: repeat(2, 1fr); }
            .footer-inner { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 640px) {
            .nav-principale { display: none; }
            .header-inner { gap: 1rem; }
            .hero h1 { font-size: 1.6rem; }
            .grille-articles { grid-template-columns: 1fr; }
            .grille-categories { grid-template-columns: 1fr 1fr; }
            .formations-inner { flex-direction: column; }
            .footer-inner { grid-template-columns: 1fr; }
        }

        /* ===== ANIMATION D'ENTRÉE ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(14px); }
            to   { opacity: 1; transform: translateY(0); }
        }
        .hero         { animation: fadeUp .45s ease both; }
        .section-categories { animation: fadeUp .45s .1s ease both; }
        .section-articles   { animation: fadeUp .45s .2s ease both; }
        .section-formations { animation: fadeUp .45s .3s ease both; }