/* ============================================================
   IMPULSION — base & styles custom (au-delà de Tailwind CDN)
   ============================================================ */

/* ---- Reset doux + base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--abyss);
  color: var(--cream);
  font-family: "Lato", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, .font-display {
  font-family: "Playfair Display", Georgia, "Times New Roman", serif;
  font-weight: 500;          /* le sérif élégant : on ne le surcharge pas en bold partout */
  line-height: 1.06;
  letter-spacing: -0.01em;
}

/* ---- Échelle typographique fluide ---- */
.t-display { font-size: clamp(2.6rem, 1.4rem + 4.6vw, 5rem); }
.t-h2      { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.25rem); }
.t-h3      { font-size: clamp(1.4rem, 1.1rem + 1.1vw, 1.9rem); }
.t-lead    { font-size: clamp(1.1rem, 1rem + 0.5vw, 1.4rem); line-height: 1.55; }

/* ---- Eyebrow / label (Lato bold, lettré) ---- */
.eyebrow {
  font-family: "Lato", sans-serif;
  font-weight: 700;
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

/* ---- Largeur de lecture confortable ---- */
.measure { max-width: 64ch; }
.measure-sm { max-width: 52ch; }

/* ---- Filet bronze : motif récurrent de la marque ---- */
.rule-bronze {
  height: 2px; width: 56px;
  background: var(--bronze);
  border: 0; border-radius: 2px;
}

/* ---- Liens de contenu ---- */
a { color: inherit; }
.link-bronze {
  color: var(--bronze);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklch, var(--bronze) 45%, transparent);
  transition: border-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.link-bronze:hover { border-color: var(--bronze); }
/* sur fond clair : bronze foncé lisible */
.on-cream .link-bronze { color: var(--bronze-ink); border-bottom-color: color-mix(in oklch, var(--bronze-ink) 45%, transparent); }

/* ============================================================
   Sections : rythme dark (abysse) ↔ clair (cream)
   ============================================================ */
.section { padding-block: clamp(4.5rem, 3rem + 7vw, 8rem); }
.shell { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1.25rem, 0.5rem + 3vw, 2.5rem); }

.on-abyss { background: var(--abyss); color: var(--cream); }
.on-abyss-deep { background: var(--abyss-800); color: var(--cream); }
.on-cream { background: var(--cream); color: var(--abyss); }
.on-cream-2 { background: var(--cream-200); color: var(--abyss); }

.on-cream .eyebrow, .on-cream-2 .eyebrow { color: var(--bronze-ink); }
.on-abyss .eyebrow, .on-abyss-deep .eyebrow { color: var(--bronze); }

.on-cream .text-muted, .on-cream-2 .text-muted { color: var(--slate-ink); }
.on-abyss .text-muted, .on-abyss-deep .text-muted { color: var(--slate-ondark); }

/* ============================================================
   Boutons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6em;
  min-height: 50px; padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  font-family: "Lato", sans-serif; font-weight: 700; font-size: 1rem;
  letter-spacing: 0.01em; text-decoration: none; cursor: pointer; border: 1.5px solid transparent;
  transition: transform var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
  will-change: transform;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn .arrow { transition: transform var(--dur) var(--ease-out); }
.btn:hover .arrow { transform: translateX(3px); }
@media (prefers-reduced-motion: reduce) { .btn, .btn .arrow { transition: none; } .btn:active { transform: none; } }

/* primaire : pilule bronze, encre abysse */
.btn-primary { background: var(--bronze); color: var(--abyss-900); }
.btn-primary:hover { background: var(--bronze-600); }

/* secondaire sur sombre : contour clair */
.btn-ghost-light { background: transparent; color: var(--cream); border-color: color-mix(in oklch, var(--cream) 38%, transparent); }
.btn-ghost-light:hover { border-color: var(--cream); background: color-mix(in oklch, var(--cream) 8%, transparent); }

/* secondaire sur clair : contour abysse */
.btn-ghost-dark { background: transparent; color: var(--abyss); border-color: color-mix(in oklch, var(--abyss) 28%, transparent); }
.btn-ghost-dark:hover { border-color: var(--abyss); background: color-mix(in oklch, var(--abyss) 5%, transparent); }

.btn:focus-visible { outline: 3px solid var(--bronze); outline-offset: 3px; }

/* ============================================================
   Cartes
   ============================================================ */
.card {
  border-radius: var(--radius-card);
  padding: clamp(1.5rem, 1rem + 1.5vw, 2.25rem);
  border: 1px solid;
}
.on-abyss .card, .on-abyss-deep .card {
  background: var(--abyss-700);
  border-color: var(--abyss-600);
}
.on-cream .card, .on-cream-2 .card {
  background: #fffdfa;
  border-color: var(--cream-300);
  box-shadow: 0 1px 0 rgba(15,44,64,0.03), 0 18px 40px -28px rgba(15,44,64,0.25);
}

/* puce numérotée bronze */
.pin {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; flex: none;
  border-radius: 50%;
  font-family: "Playfair Display", serif; font-size: 1.25rem; font-weight: 600;
  background: color-mix(in oklch, var(--bronze) 18%, transparent);
  color: var(--bronze);
  border: 1px solid color-mix(in oklch, var(--bronze) 40%, transparent);
}
.on-cream .pin, .on-cream-2 .pin { color: var(--bronze-ink); }

/* icône SVG dans pastille */
.ic {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; flex: none; border-radius: 12px;
  background: color-mix(in oklch, var(--bronze) 16%, transparent);
  color: var(--bronze);
}
.ic svg { width: 1.4rem; height: 1.4rem; }
.on-cream .ic, .on-cream-2 .ic { color: var(--bronze-ink); }

/* ============================================================
   Navbar
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 50;
  transition: background-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav[data-scrolled="true"] {
  background: color-mix(in oklch, var(--abyss-900) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--abyss-700);
}
.nav-link {
  color: var(--slate-ondark); text-decoration: none; font-size: 0.95rem; font-weight: 400;
  padding: 0.4rem 0; position: relative;
  transition: color var(--dur) var(--ease-out);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--cream); }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--bronze); transition: width var(--dur) var(--ease-out);
}
.nav-link:hover::after { width: 100%; }
@media (prefers-reduced-motion: reduce) { .nav-link::after { transition: none; } }

/* menu mobile */
.menu-panel { display: none; }
.menu-panel[data-open="true"] { display: block; }

/* ============================================================
   Logo mark — « impulsion » : trait ascendant
   ============================================================ */
.logo { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.logo-word {
  font-family: "Playfair Display", serif; font-weight: 600; letter-spacing: 0.06em;
  font-size: 1.32rem; color: var(--cream);
}
.logo-word .dot { color: var(--bronze); }

/* ============================================================
   Organigramme PHI → SPV → Cible
   ============================================================ */
.org { display: grid; gap: 0.9rem; }
.org-node {
  border-radius: 14px; padding: 1rem 1.15rem; text-align: center;
  border: 1px solid var(--abyss-600); background: var(--abyss-700);
}
.org-node .t { font-family: "Playfair Display", serif; font-size: 1.15rem; color: var(--cream); }
.org-node .s { font-size: 0.8rem; color: var(--slate-ondark); margin-top: 0.15rem; }
.org-node--root { border-color: color-mix(in oklch, var(--bronze) 55%, transparent); }
.org-arrow { display: flex; justify-content: center; color: var(--bronze); }
.org-arrow svg { width: 1.4rem; height: 1.4rem; }

/* ============================================================
   FAQ accordéon (grid-rows 0fr → 1fr)
   ============================================================ */
.faq-item { border-bottom: 1px solid var(--cream-300); }
.faq-btn {
  width: 100%; text-align: left; display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; padding: 1.4rem 0; background: none; border: 0; cursor: pointer;
  font-family: "Playfair Display", serif; font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  color: var(--abyss); line-height: 1.25;
}
.faq-btn:focus-visible { outline: 3px solid var(--bronze); outline-offset: 4px; border-radius: 4px; }
.faq-chevron { flex: none; color: var(--bronze-ink); transition: transform var(--dur) var(--ease-out); }
.faq-btn[aria-expanded="true"] .faq-chevron { transform: rotate(180deg); }
.faq-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur-slow) var(--ease-out); }
.faq-panel[data-open="true"] { grid-template-rows: 1fr; }
.faq-panel > div { overflow: hidden; }
.faq-panel p { margin: 0 0 1.4rem; color: var(--slate-ink); max-width: 68ch; }
@media (prefers-reduced-motion: reduce) {
  .faq-chevron, .faq-panel { transition: none; }
}

/* ============================================================
   Champs de formulaire
   ============================================================ */
.field-label { display: block; font-weight: 700; font-size: 0.9rem; margin-bottom: 0.45rem; }
.field {
  width: 100%; min-height: 50px;
  background: color-mix(in oklch, var(--abyss-900) 35%, transparent);
  border: 1px solid var(--abyss-600); border-radius: 11px;
  color: var(--cream); padding: 0.75rem 1rem; font: inherit;
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.field::placeholder { color: color-mix(in oklch, var(--slate-ondark) 80%, transparent); }
.field:focus-visible { outline: none; border-color: var(--bronze); box-shadow: 0 0 0 3px color-mix(in oklch, var(--bronze) 30%, transparent); }
.field[aria-invalid="true"] { border-color: var(--bronze); }
textarea.field { min-height: 120px; resize: vertical; }
.field-error { color: var(--bronze); font-size: 0.85rem; margin-top: 0.4rem; }

/* ============================================================
   Reveal au scroll — contenu VISIBLE par défaut.
   On ne masque que si .anim (JS présent ET motion autorisé) est posé sur <html>.
   => pas de JS / reduced-motion / JS cassé : rien ne reste invisible.
   ============================================================ */
.anim [data-reveal] { opacity: 0; transform: translateY(18px); }
.anim [data-reveal].is-in { opacity: 1; transform: none; }
.anim [data-stagger] > * { opacity: 0; transform: translateY(14px); }
.anim [data-stagger].is-in > * { opacity: 1; transform: none; }

/* ============================================================
   Divers
   ============================================================ */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--bronze); color: var(--abyss-900); padding: 0.7rem 1.1rem; border-radius: 0 0 10px 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; }

.hairline-top { border-top: 1px solid var(--abyss-600); }
.dot-sep { color: var(--bronze); padding-inline: 0.55rem; }

@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { [data-spinner] { animation: none !important; } }

.grain {  /* léger voile bronze derrière le hero, pas de glassmorphism */
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 78% 12%, color-mix(in oklch, var(--bronze) 14%, transparent), transparent 70%),
    radial-gradient(55% 45% at 12% 88%, color-mix(in oklch, var(--abyss-600) 50%, transparent), transparent 72%);
}