:root {
    --font-serif: 'IBM Plex Serif', Georgia, 'Times New Roman', serif;
    --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;

    --color-bg: #0A0E16;
    --color-bg-elevated: #0F1521;
    --color-bg-card: #121A28;
    --color-text-primary: #E9EEF8;
    --color-text-secondary: #94A1B8;
    --color-text-muted: #5C6882;
    --color-accent-blue: #3B93E8;
    --color-accent-blue-bright: #6FBBFF;
    --color-accent-red: #C8402E;
    --color-border: rgba(233,238,248,0.09);
    --color-border-strong: rgba(233,238,248,0.18);

    box-sizing: border-box;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) { --color-bg: #0A0E16; }
  }
  :root[data-theme="dark"] { --color-bg: #0A0E16; }

  html { scroll-behavior: smooth; scroll-padding-top: calc(78px + env(safe-area-inset-top, 0px)); }
  *, *::before, *::after { box-sizing: border-box; }

  body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  img, svg { max-width: 100%; }
  .wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
  a { color: inherit; }
  h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; margin: 0; letter-spacing: -0.01em; }
  .mono { font-family: var(--font-mono); }
  .scroll-x { overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* ---------- NAV ---------- */
  header.site {
    position: sticky; top: 0; top: env(safe-area-inset-top, 0px); z-index: 50;
    background: rgba(10,14,22,0.90); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 24px; max-width: 1080px; margin: 0 auto; }
  .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--color-text-primary); }
  .brand img { width: 38px; height: 38px; border-radius: 50%; display: block; }
  .brand .brand-text { display: flex; flex-direction: column; line-height: 1.15; }
  .brand .brand-text strong { font-family: var(--font-serif); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.01em; }
  .brand .brand-text small { font-family: var(--font-mono); font-size: 0.64rem; color: var(--color-accent-blue-bright); font-weight: 500; }
  nav.links { display: flex; gap: 26px; align-items: center; }
  nav.links a { text-decoration: none; color: var(--color-text-secondary); font-size: 0.9rem; transition: color .15s; }
  nav.links a:hover, nav.links a:focus-visible { color: var(--color-text-primary); }
  .btn {
    display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 4px;
    font-size: 0.92rem; font-weight: 600; text-decoration: none; border: 1px solid transparent;
    cursor: pointer; font-family: var(--font-sans); transition: background .15s, border-color .15s, transform .1s;
  }
  .btn:active { transform: translateY(1px); }
  .btn-primary { background: var(--color-accent-blue); color: #061018; }
  .btn-primary:hover { background: var(--color-accent-blue-bright); }
  .btn-ghost { background: transparent; border-color: var(--color-border-strong); color: var(--color-text-primary); }
  .btn-ghost:hover { border-color: var(--color-accent-blue-bright); color: var(--color-accent-blue-bright); }
  .nav-cta { display: none; }
  @media (min-width: 760px) { .nav-cta { display: inline-flex; } }
  .menu-toggle { display: inline-flex; background: none; border: 1px solid var(--color-border-strong); border-radius: 4px; color: var(--color-text-primary); padding: 8px 10px; font-family: var(--font-mono); }
  @media (min-width: 760px) { .menu-toggle { display: none; } nav.links { display: flex; } }
  @media (max-width: 759px) {
    nav.links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-bg-elevated); flex-direction: column; align-items: flex-start; padding: 20px 24px; border-bottom: 1px solid var(--color-border); gap: 16px; }
    nav.links.open { display: flex; }
  }

  /* ---------- HERO ---------- */
  .hero { padding: 64px 0 48px; }
  .hero-grid { display: grid; gap: 40px; }
  @media (min-width: 860px) { .hero-grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; } }
  .kicker { font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-accent-blue-bright); margin-bottom: 18px; }
  .hero h1 {
    font-size: clamp(2rem, 5vw, 3rem); line-height: 1.1; max-width: 16ch;
    opacity: 0; animation: rise .7s ease-out .05s forwards;
  }
  .hero p.lede {
    margin-top: 22px; font-size: 1.1rem; color: var(--color-text-secondary); max-width: 48ch;
    opacity: 0; animation: rise .7s ease-out .18s forwards;
  }
  .hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; opacity: 0; animation: rise .7s ease-out .3s forwards; }
  @keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
  @media (prefers-reduced-motion: reduce) { .hero h1, .hero p.lede, .hero-ctas { animation: none; opacity: 1; } }

  .case-tag {
    display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.74rem;
    color: var(--color-accent-blue-bright); border: 1px solid var(--color-border-strong); padding: 5px 10px; border-radius: 3px;
  }
  .dossier { border: 1px solid var(--color-border); background: var(--color-bg-card); border-radius: 8px; padding: 24px; }
  .dossier-logo { display: flex; justify-content: center; margin-bottom: 18px; }
  .dossier-logo img { width: 92px; height: 92px; border-radius: 50%; }
  .dossier .field { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px dashed var(--color-border); font-size: 0.87rem; }
  .dossier .field:last-child { border-bottom: none; }
  .dossier .field span:first-child { color: var(--color-text-muted); font-family: var(--font-mono); font-size: 0.76rem; }
  .dossier .field span:last-child { color: var(--color-text-primary); text-align: right; }

  /* ---------- FRAMEWORK (ATT&CK / D3FEND / CAR) ---------- */
  .framework-section { padding: 64px 0; border-top: 1px solid var(--color-border); }
  .framework-grid { display: grid; gap: 1px; background: var(--color-border); border: 1px solid var(--color-border); margin-top: 36px; }
  @media (min-width: 760px) { .framework-grid { grid-template-columns: repeat(3, 1fr); } }
  .fw-card { background: var(--color-bg); padding: 28px 24px; }
  .fw-card .fw-tag { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-accent-blue-bright); }
  .fw-card h3 { font-size: 1.1rem; margin-top: 10px; font-family: var(--font-sans); font-weight: 600; }
  .fw-card p { margin-top: 10px; font-size: 0.88rem; color: var(--color-text-secondary); }
  .fw-card.red .fw-tag { color: #E07A6C; }

  /* ---------- PRINCIPE FONDATEUR ---------- */
  .principle-section { padding: 56px 0; border-top: 1px solid var(--color-border); }
  .principle-box { border-left: 3px solid var(--color-accent-blue); padding: 4px 0 4px 26px; }
  .principle-box p.lead { font-family: var(--font-serif); font-size: clamp(1.3rem, 3vw, 1.65rem); line-height: 1.38; color: var(--color-text-primary); max-width: 40ch; }
  .principle-box p.sub { margin-top: 16px; color: var(--color-text-secondary); font-size: 1rem; max-width: 58ch; }

  /* ---------- ACTIVITES ---------- */
  .activities-grid { display: grid; gap: 1px; background: var(--color-border); border: 1px solid var(--color-border); margin-top: 36px; }
  @media (min-width: 640px) { .activities-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 960px) { .activities-grid { grid-template-columns: repeat(4, 1fr); } }
  .activity-card { background: var(--color-bg); padding: 26px 22px; }
  .activity-card .num { font-family: var(--font-mono); font-size: 0.76rem; color: var(--color-accent-blue-bright); }
  .activity-card h3 { font-size: 1rem; font-family: var(--font-sans); font-weight: 600; margin-top: 10px; }
  .activity-card p { margin-top: 10px; font-size: 0.86rem; color: var(--color-text-secondary); }

  /* ---------- CLIENTS CIBLES ---------- */
  .clients-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 16px; margin-top: 28px; }
  .client-card { border: 1px solid var(--color-border); border-radius: 6px; padding: 20px; background: var(--color-bg-card); }
  .client-card h3 { font-size: 0.95rem; font-family: var(--font-sans); font-weight: 600; }
  .client-card p { margin: 8px 0 0; font-size: 0.84rem; color: var(--color-text-muted); }

  /* ---------- SECTIONS ---------- */
  section { padding: 64px 0; border-top: 1px solid var(--color-border); }
  .section-head { max-width: 62ch; margin-bottom: 36px; }
  .section-head h2 { font-size: clamp(1.5rem, 3.4vw, 2.05rem); }
  .section-head p { margin-top: 14px; color: var(--color-text-secondary); font-size: 1.01rem; }

  .about-block { display: grid; gap: 36px; }
  @media (min-width: 860px) { .about-block { grid-template-columns: 1fr 1fr; } }
  .about-block p { color: var(--color-text-secondary); font-size: 1rem; }
  .about-block p + p { margin-top: 16px; }

  .expertise-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px,1fr)); gap: 1px; background: var(--color-border); border: 1px solid var(--color-border); margin-top: 36px; }
  .expertise-cell { background: var(--color-bg); padding: 22px 20px; }
  .expertise-cell h3 { font-family: var(--font-sans); font-size: 0.97rem; font-weight: 600; }
  .expertise-cell p { margin: 8px 0 0; font-size: 0.85rem; color: var(--color-text-muted); }

  /* ---------- SERVICES ---------- */
  .service-tabs { display: flex; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
  .tab-btn { font-family: var(--font-sans); font-size: 0.92rem; font-weight: 600; padding: 10px 18px; border-radius: 4px; border: 1px solid var(--color-border-strong); background: transparent; color: var(--color-text-secondary); cursor: pointer; }
  .tab-btn[aria-selected="true"] { background: var(--color-accent-blue); color: #061018; border-color: var(--color-accent-blue); }
  .tab-panel { display: none; }
  .tab-panel.active { display: block; }
  .service-grid { display: grid; gap: 24px; }
  @media (min-width: 760px) { .service-grid { grid-template-columns: 1fr 1fr; } }
  .service-card { border: 1px solid var(--color-border); border-radius: 6px; padding: 26px; background: var(--color-bg-card); }
  .service-card h3 { font-size: 1.04rem; font-family: var(--font-sans); font-weight: 600; margin-bottom: 14px; }
  .service-card ul { margin: 0; padding-left: 0; list-style: none; }
  .service-card li { font-size: 0.91rem; color: var(--color-text-secondary); padding: 8px 0; border-top: 1px solid var(--color-border); }
  .service-card li:first-child { border-top: none; }
  .service-card .btn { margin-top: 20px; }

  /* ---------- METHODE ---------- */
  .steps { counter-reset: step; display: grid; gap: 0; margin-top: 32px; }
  .step { display: grid; grid-template-columns: 56px 1fr; gap: 20px; padding: 22px 0; border-top: 1px solid var(--color-border); }
  .step:first-child { border-top: none; }
  .step-num { counter-increment: step; font-family: var(--font-mono); font-size: 0.95rem; color: var(--color-accent-blue-bright); }
  .step-num::before { content: "0" counter(step); }
  .step h3 { font-size: 1rem; font-family: var(--font-sans); font-weight: 600; margin-bottom: 6px; }
  .step p { margin: 0; color: var(--color-text-secondary); font-size: 0.91rem; max-width: 60ch; }

  /* ---------- EQUIPE ---------- */
  .team-card { display: grid; gap: 24px; margin-top: 32px; border: 1px solid var(--color-border); border-radius: 8px; padding: 28px; background: var(--color-bg-card); }
  @media (min-width: 760px) { .team-card { grid-template-columns: 200px 1fr; align-items: start; } }
  .team-id { text-align: center; }
  .team-id .avatar { width: 96px; height: 96px; border-radius: 50%; background: var(--color-bg-elevated); border: 1px solid var(--color-border-strong); display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 1.6rem; color: var(--color-accent-blue-bright); margin: 0 auto 12px; }
  .team-id strong { display: block; font-size: 0.95rem; }
  .team-id span { display: block; font-size: 0.78rem; color: var(--color-text-muted); margin-top: 4px; }
  .team-text p { color: var(--color-text-secondary); font-size: 0.94rem; }
  .team-text p + p { margin-top: 12px; }

  /* ---------- CREDIBILITE ---------- */
  .cred-grid { display: grid; gap: 24px; margin-top: 32px; }
  @media (min-width: 760px) { .cred-grid { grid-template-columns: repeat(3, 1fr); } }
  .cred-card { background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: 6px; padding: 22px; }
  .cred-card .num { font-family: var(--font-serif); font-size: 1.85rem; color: var(--color-accent-blue-bright); }
  .cred-card .label { margin-top: 6px; font-size: 0.87rem; color: var(--color-text-secondary); }
  .badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
  .badge { font-family: var(--font-mono); font-size: 0.77rem; border: 1px solid var(--color-border-strong); border-radius: 3px; padding: 7px 12px; color: var(--color-text-secondary); }

  .qual-list { margin-top: 32px; display: grid; gap: 0; }
  .qual-row { display: grid; grid-template-columns: 150px 1fr; gap: 18px; padding: 16px 0; border-top: 1px solid var(--color-border); }
  .qual-row:first-child { border-top: none; }
  .qual-row .qual-tag { font-family: var(--font-mono); font-size: 0.74rem; color: var(--color-accent-blue-bright); padding-top: 2px; }
  .qual-row p { margin: 0; font-size: 0.95rem; color: var(--color-text-secondary); max-width: 62ch; }
  @media (max-width: 560px) { .qual-row { grid-template-columns: 1fr; gap: 6px; } }

  /* ---------- CONTACT ---------- */
  .contact-grid { display: grid; gap: 40px; }
  @media (min-width: 860px) { .contact-grid { grid-template-columns: 0.85fr 1.15fr; } }
  .contact-info .row { display: flex; gap: 12px; padding: 14px 0; border-top: 1px solid var(--color-border); font-size: 0.93rem; }
  .contact-info .row:first-child { border-top: none; }
  .contact-info .row span:first-child { color: var(--color-text-muted); font-family: var(--font-mono); font-size: 0.77rem; min-width: 90px; }
  form.contact { display: grid; gap: 16px; }
  .field-row { display: grid; gap: 6px; }
  .field-row label { font-size: 0.81rem; color: var(--color-text-secondary); font-family: var(--font-mono); }
  .field-row input, .field-row select, .field-row textarea {
    font-family: var(--font-sans); background: var(--color-bg-card); border: 1px solid var(--color-border-strong);
    border-radius: 4px; padding: 12px 14px; color: var(--color-text-primary); font-size: 0.95rem; width: 100%;
  }
  .field-row textarea { resize: vertical; min-height: 110px; }
  .field-row input:focus, .field-row select:focus, .field-row textarea:focus,
  a:focus-visible, button:focus-visible { outline: 2px solid var(--color-accent-blue-bright); outline-offset: 2px; }
  .form-note { font-size: 0.81rem; color: var(--color-text-muted); }

  footer.site { border-top: 1px solid var(--color-border); padding: 32px 0; padding-bottom: calc(32px + env(safe-area-inset-bottom, 0px)); }
  .footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; align-items: center; }
  .footer-brand { display: flex; align-items: center; gap: 10px; }
  .footer-brand img { width: 24px; height: 24px; border-radius: 50%; }
  .footer-inner p { margin: 0; font-size: 0.81rem; color: var(--color-text-muted); }