/* ─────────────────────────────────────────────────────────────
   VK Invest — base commune des pages intérieures
   (Ressources, article, pages légales, 404)
   Mêmes repères que la page d'accueil : fond sombre, rouge VK,
   menu, boutons, pied de page et apparitions au défilement.
   ───────────────────────────────────────────────────────────── */
:root {
  --ground: #17120f;
  --ground-deep: #0F0F0F;
  --panel: #141414;
  --panel-2: #101010;
  --ink: #ffffff;
  --ink-soft: rgba(255, 255, 255, 0.72);
  --ink-faint: rgba(255, 255, 255, 0.46);
  --red: #C8192A;
  --red-lit: #E5384A;
  --red-dark: #A8141F;
  --glass: rgba(255, 255, 255, 0.035);
  --glass-2: rgba(255, 255, 255, 0.06);
  --hair: rgba(255, 255, 255, 0.12);
  --hair-soft: rgba(255, 255, 255, 0.07);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: clamp(18px, 2.6vw, 44px);
  --maxw: 1200px;
  --sans: 'Outfit', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --serif: 'DM Serif Display', Georgia, 'Times New Roman', serif;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--ground-deep); color: var(--ink); font-family: var(--sans);
  font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility; overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--red-lit); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { text-wrap: balance; }
a, button, input, select { touch-action: manipulation; -webkit-tap-highlight-color: rgba(200, 25, 42, 0.14); }

.skip-link { position: absolute; left: -9999px; top: 12px; z-index: 200; padding: 10px 16px; border-radius: 999px; background: #fff; color: #150500; font-size: 14px; font-weight: 600; }
.skip-link:focus { left: 12px; }

/* ===== Boutons ===== */
.btn { display: inline-flex; align-items: center; gap: 10px; border-radius: 999px; font-family: var(--sans); font-weight: 500; letter-spacing: -0.01em; white-space: nowrap; transition: transform .35s var(--ease-out), background-color .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease-out); }
.btn--light { padding: 0.72em 1.35em; background: #fff; color: #180600; box-shadow: 0 10px 26px rgba(0,0,0,0.35); }
.btn--light:hover { transform: translateY(-1px); background: #fff4ec; }
.btn--flame { padding: 0.5em 0.5em 0.5em 1.5em; background: linear-gradient(96deg, var(--red) 0%, var(--red-lit) 100%); color: #fff; font-weight: 600; box-shadow: 0 14px 40px rgba(200,25,42,0.4); }
.btn--flame:hover { transform: translateY(-2px); box-shadow: 0 20px 52px rgba(200,25,42,0.52); }
.btn--plain { padding: 0.85em 1.5em; justify-content: center; }
.btn--ghost { padding: 0.72em 1.4em; border: 1px solid var(--hair); color: #fff; }
.btn--ghost:hover { border-color: #fff; background: rgba(255,255,255,0.05); }
.go-dot { display: grid; place-items: center; width: 2.55em; height: 2.55em; border-radius: 999px; background: #fff; color: #1a0600; }
.go-dot svg { width: 1.15em; height: 1.15em; }

/* ===== Barre de progression du défilement ===== */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--red), var(--red-lit)); z-index: 120; transition: width .1s linear; }

/* ===== Menu ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: clamp(14px, 1.7vw, 20px) var(--gutter); transition: padding .35s var(--ease-out), background-color .35s var(--ease-out), border-color .35s var(--ease-out); border-bottom: 1px solid transparent; }
.nav.scrolled { padding-top: 11px; padding-bottom: 11px; background: rgba(13,13,13,0.78); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom-color: var(--hair); }
.nav__brand { display: inline-flex; align-items: center; gap: 9px; font-family: var(--sans); font-size: clamp(18px, 1.5vw, 22px); font-weight: 700; letter-spacing: -0.025em; }
.nav__logo { flex: none; width: 2em; height: 2em; }
/* Nom sous la marque par défaut ; sur une ligne (« VK Invest - Virgile KUHNEL ») dès que la place le permet */
.nav__name { display: flex; flex-direction: column; gap: 0.22em; line-height: 1; white-space: nowrap; }
.nav__person { font-size: 0.6em; font-weight: 500; letter-spacing: 0.01em; color: rgba(255,255,255,0.74); }
.nav__dash { display: none; }
@media (min-width: 360px) and (max-width: 480px), (min-width: 540px) and (max-width: 1023px), (min-width: 1280px) {
  .nav__name { flex-direction: row; align-items: baseline; gap: 0.36em; }
  .nav__person { font-size: 0.82em; letter-spacing: -0.01em; }
  .nav__dash { display: inline; margin-right: 0.3em; }
}
.nav__pill { display: none; padding: 5px; border: 1px solid var(--hair); border-radius: 12px; background: rgba(20,16,14,0.4); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.nav__pill ul { display: flex; align-items: center; gap: 3px; margin: 0; padding: 0; list-style: none; }
.nav__pill a { display: inline-flex; align-items: center; white-space: nowrap; padding: 8px 13px; border-radius: 8px; font-size: 13.5px; font-weight: 500; color: rgba(255,255,255,0.82); transition: background-color .3s var(--ease-out), color .3s var(--ease-out); }
.nav__pill a:hover, .nav__pill a[aria-current="page"] { background: rgba(255,255,255,0.1); color: #fff; }
.nav__actions { display: flex; align-items: center; gap: 10px; }
.nav__cta { font-size: 13.5px; font-weight: 600; }
.nav__burger { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--hair); border-radius: 10px; background: rgba(20,16,14,0.45); backdrop-filter: blur(10px); }
.nav__burger svg { width: 20px; height: 20px; }
.nav__sheet { position: fixed; inset: 68px 12px auto; z-index: 110; padding: 18px; border: 1px solid var(--hair); border-radius: 18px; background: rgba(15,15,15,0.97); backdrop-filter: blur(20px); display: none; }
.nav__sheet.is-open { display: block; }
.nav__sheet ul { margin: 0 0 14px; padding: 0; list-style: none; display: grid; gap: 2px; }
.nav__sheet a { display: block; padding: 12px 10px; border-radius: 10px; font-size: 16px; color: rgba(255,255,255,0.86); }
.nav__sheet a:hover, .nav__sheet a[aria-current="page"] { background: rgba(255,255,255,0.07); }
.nav__sheet .nav__sheet-cta { display: flex; width: 100%; justify-content: center; padding: 0.85em 1.4em; color: #fff; }
/* Écran large : menu centré sur la page (colonnes égales de part et d'autre) */
@media (min-width: 1024px) { .nav { display: grid; grid-template-columns: 1fr auto 1fr; } .nav__brand { justify-self: start; } .nav__actions { justify-self: end; } .nav__pill { display: block; } .nav__burger { display: none; } }
@media (max-width: 480px) { .nav__cta { display: none; } }

/* ===== Sections ===== */
.section { position: relative; padding: clamp(64px, 8vw, 116px) var(--gutter); }
.section--alt { background: var(--panel-2); border-top: 1px solid var(--hair-soft); border-bottom: 1px solid var(--hair-soft); }
.wrap { max-width: var(--maxw); margin: 0 auto; position: relative; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; font-size: 12.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 18px; }
.eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--red); display: inline-block; }
.s-head { max-width: 720px; margin-bottom: 44px; }
.s-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.s-head.center .eyebrow { justify-content: center; }
.s-head h2 { font-family: var(--sans); font-weight: 700; font-size: clamp(30px, 4.4vw, 52px); line-height: 1.04; letter-spacing: -0.03em; }
.s-head h2 em, .page-hero h1 em { font-family: var(--serif); font-weight: 400; font-style: italic; color: var(--red-lit); letter-spacing: -0.01em; }
.s-head p { margin-top: 18px; font-size: 16.5px; line-height: 1.6; color: var(--ink-soft); }

/* ===== En-tête de page intérieure ===== */
.page-hero { position: relative; isolation: isolate; overflow: hidden; padding: clamp(132px, 15vw, 196px) var(--gutter) clamp(52px, 7vw, 92px); background: linear-gradient(165deg, var(--ground) 0%, var(--ground-deep) 70%); border-bottom: 1px solid var(--hair-soft); }
.page-hero__glow { position: absolute; inset: 0; z-index: -1; pointer-events: none; will-change: transform, opacity; background: radial-gradient(48% 78% at 88% 34%, rgba(200,25,42,0.32) 0%, rgba(200,25,42,0) 64%); animation: glow-drift 13s ease-in-out infinite alternate; }
@keyframes glow-drift { from { opacity: 0.7; transform: translate3d(0,0,0) scale(1); } to { opacity: 1; transform: translate3d(-3%,-3%,0) scale(1.14); } }
.page-hero h1 { font-family: var(--sans); font-weight: 700; font-size: clamp(2.3rem, 5.4vw, 4.6rem); line-height: 0.98; letter-spacing: -0.035em; max-width: 15em; }
.page-hero p { margin-top: 22px; max-width: 560px; font-size: 16.5px; line-height: 1.6; color: var(--ink-soft); }
.page-hero .eyebrow, .page-hero h1, .page-hero p { animation: rise 0.95s var(--ease-out) both; }
.page-hero h1 { animation-delay: 0.06s; }
.page-hero p { animation-delay: 0.14s; }
@keyframes rise { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

/* ===== Cartes ===== */
.card { background: var(--glass); border: 1px solid var(--hair); border-radius: 18px; transition: transform .45s var(--ease-out), border-color .45s var(--ease-out), background-color .45s var(--ease-out), box-shadow .45s var(--ease-out); }
.card:hover { transform: translateY(-6px); border-color: rgba(229,56,74,0.45); background: var(--glass-2); box-shadow: 0 30px 60px -30px rgba(0,0,0,0.7); }

/* ===== Pied de page ===== */
.footer { background: #0b0b0b; border-top: 1px solid var(--hair-soft); padding: clamp(50px, 6vw, 80px) var(--gutter) 40px; }
.footer__inner { max-width: var(--maxw); margin: 0 auto; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 32px; }
.footer__logo { display: inline-block; }
.footer__logo img { display: block; height: 96px; width: auto; }
.footer__brand p { margin-top: 18px; font-size: 13.5px; line-height: 1.65; color: var(--ink-faint); max-width: 300px; }
.footer h4 { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 14px; }
.footer ul { list-style: none; padding: 0; display: grid; gap: 9px; }
.footer ul a { font-size: 14px; color: rgba(255,255,255,0.75); transition: color .25s; }
.footer ul a:hover { color: var(--red-lit); }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--hair-soft); }
.footer__bottom p { font-size: 12.5px; color: var(--ink-faint); }
.certs { display: flex; flex-wrap: wrap; gap: 8px; }
.cert { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: rgba(255,255,255,0.6); border: 1px solid var(--hair); border-radius: 6px; padding: 4px 9px; }

/* ===== Apparitions au défilement ===== */
/* Masqué seulement si le script est actif (classe « js » posée dans l'en-tête) : sans lui, tout reste visible */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.js .reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }

/* Ancres sous le menu fixe */
:target, section[id], [id^="sim-"] { scroll-margin-top: 96px; }

@media (max-width: 980px) {
  .footer__top { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 620px) {
  .footer__top { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .page-hero__glow, .page-hero .eyebrow, .page-hero h1, .page-hero p { animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}