/* =====================================================================
   ia-style.css — Design system partagé des pages "Formation IA"
   Formateur51 · modulable : chaque page définit 3 variables de thème
   sur <body> :  --ia-theme  --ia-theme-2  --ia-theme-soft
   ===================================================================== */

:root {
  --ia-theme: #1565C0;      /* fallback */
  --ia-theme-2: #2196F3;
  --ia-theme-soft: #E8F2FD;
}

/* ── SOUS-NAVIGATION AUTONOME (injectée par ia-nav.js) ─────────────── */
.ia-subnav {
  position: sticky;
  top: var(--nav-h, 72px);
  margin-top: var(--nav-h, 72px);   /* dégage la navbar fixe au chargement */
  z-index: 900;
  background: #fff;
  border-bottom: 1px solid var(--border-light, #e6eef7);
  box-shadow: 0 2px 14px rgba(8,42,90,.06);
}
.ia-subnav-inner {
  display: flex; align-items: center; gap: 16px;
}
.ia-subnav-brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display, sans-serif); font-weight: 800;
  color: var(--ia-theme); white-space: nowrap; text-decoration: none;
  font-size: .95rem; flex-shrink: 0;
}
.ia-subnav-scroll {
  display: flex; gap: 8px; overflow-x: auto; padding: 10px 0;
  scrollbar-width: none; -ms-overflow-style: none;
}
.ia-subnav-scroll::-webkit-scrollbar { display: none; }
.ia-subnav-link {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 15px; border-radius: 99px; white-space: nowrap;
  font-size: .86rem; font-weight: 600; color: var(--text-secondary, #51637a);
  text-decoration: none; border: 1.5px solid transparent;
  transition: background .2s, color .2s, border-color .2s;
}
.ia-subnav-link i { font-size: .8rem; opacity: .9; }
.ia-subnav-link:hover {
  background: var(--ia-theme-soft); color: var(--ia-theme); border-color: var(--ia-theme-soft);
}
.ia-subnav-link--active {
  background: var(--ia-theme); color: #fff !important;
  box-shadow: 0 5px 16px rgba(0,0,0,.18);
}
.ia-subnav-link--active i { opacity: 1; }
@media (max-width: 640px) {
  .ia-subnav-brand span { display: none; }
}

/* ── HERO DE PAGE ──────────────────────────────────────────────────── */
.ia-page-hero {
  position: relative; overflow: hidden;
  padding: 80px 0 70px;
  background: linear-gradient(135deg, var(--ia-theme) 0%, var(--ia-theme-2) 100%);
  color: #fff;
}
.ia-page-hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(circle 560px at 88% 18%, rgba(255,255,255,.16) 0%, transparent 70%),
    radial-gradient(circle 480px at 5% 90%, rgba(0,0,0,.16) 0%, transparent 70%);
}
.ia-hero-inner { position: relative; z-index: 1; max-width: 820px; }
.ia-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.3);
  border-radius: 99px; padding: 7px 16px; font-size: .8rem; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase; color: #fff;
  backdrop-filter: blur(6px);
}
.ia-page-hero h1 {
  font-family: var(--font-display, sans-serif);
  font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 800; line-height: 1.08;
  margin: 16px 0 16px; color: #fff; letter-spacing: -.5px;
}
.ia-page-hero .lead {
  font-size: 1.15rem; line-height: 1.7; color: rgba(255,255,255,.92); max-width: 680px; margin: 0;
}
.ia-foryou { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.ia-foryou span {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.24);
  border-radius: 99px; padding: 8px 14px; font-size: .88rem; color: #fff;
  backdrop-filter: blur(5px);
}
.ia-foryou i { opacity: .85; }
.ia-hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 14px; }
.btn-ia-light { background: #fff; color: var(--ia-theme); border: none; }
.btn-ia-light:hover { background: #f3f6fb; transform: translateY(-2px); }
.btn-ia-ghost { background: rgba(255,255,255,.1); color: #fff; border: 1.5px solid rgba(255,255,255,.4); }
.btn-ia-ghost:hover { background: rgba(255,255,255,.2); }

/* ── BLOC INSPIRATION ──────────────────────────────────────────────── */
.ia-inspire { padding: 74px 0; }
.ia-inspire-inner { max-width: 880px; margin: 0 auto; text-align: center; }
.ia-kicker {
  display: inline-block; font-family: var(--font-display, sans-serif);
  font-weight: 800; font-size: .82rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ia-theme); margin-bottom: 14px;
}
.ia-inspire h2 {
  font-family: var(--font-display, sans-serif);
  font-size: clamp(1.6rem, 3.2vw, 2.3rem); font-weight: 800;
  color: var(--text-dark, #0d2137); line-height: 1.2; margin: 0 0 22px;
}
.ia-inspire p { font-size: 1.12rem; line-height: 1.85; color: var(--text-secondary, #51637a); margin: 0 0 18px; }
.ia-pull {
  margin: 30px auto 0; max-width: 720px;
  background: var(--ia-theme-soft); border-left: 5px solid var(--ia-theme);
  border-radius: 0 18px 18px 0; padding: 24px 30px;
  font-family: var(--font-display, sans-serif); font-size: 1.18rem; font-weight: 600;
  color: var(--text-dark, #0d2137); line-height: 1.55; text-align: left;
}

/* ── ARGUMENTS ─────────────────────────────────────────────────────── */
.ia-section { padding: 30px 0 74px; }
.ia-section.soft { background: linear-gradient(180deg, #fff 0%, #f7fbff 100%); padding: 74px 0; }
.ia-head { max-width: 760px; margin: 0 auto 44px; text-align: center; }
.ia-head .ia-kicker { color: var(--ia-theme); }
.ia-head h2 {
  font-family: var(--font-display, sans-serif); font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800; color: var(--text-dark, #0d2137); margin: 0 0 12px;
}
.ia-head p { color: var(--text-secondary, #51637a); font-size: 1.05rem; line-height: 1.7; margin: 0; }

.ia-args-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.ia-arg {
  display: flex; gap: 18px; align-items: flex-start;
  background: #fff; border: 1.5px solid var(--border-light, #e6eef7);
  border-radius: 20px; padding: 28px; box-shadow: var(--shadow-sm, 0 2px 10px rgba(8,42,90,.05));
  transition: transform .2s, box-shadow .2s;
}
.ia-arg:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg, 0 18px 40px rgba(8,42,90,.12)); }
.ia-arg-icon {
  width: 54px; height: 54px; flex-shrink: 0; border-radius: 15px;
  display: flex; align-items: center; justify-content: center; font-size: 1.35rem;
  background: var(--ia-theme-soft); color: var(--ia-theme);
}
.ia-arg h3 { margin: 0 0 8px; font-size: 1.14rem; color: var(--text-dark, #0d2137); }
.ia-arg p { margin: 0; color: var(--text-secondary, #51637a); line-height: 1.6; }

/* ── CAS CONCRETS ──────────────────────────────────────────────────── */
.ia-cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ia-case {
  background: #fff; border: 1px solid var(--border-light, #e6eef7);
  border-radius: 16px; padding: 24px; box-shadow: var(--shadow-sm, 0 2px 10px rgba(8,42,90,.05));
}
.ia-case-icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ia-theme-soft); color: var(--ia-theme); font-size: 1.1rem;
}
.ia-case h4 { margin: 0 0 6px; font-size: 1rem; color: var(--text-dark, #0d2137); }
.ia-case p { margin: 0; font-size: .92rem; color: var(--text-secondary, #51637a); line-height: 1.55; }

/* ── OBJECTION / RÉASSURANCE ───────────────────────────────────────── */
.ia-obj {
  display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: center;
  max-width: 920px; margin: 0 auto;
  background: var(--ia-theme-soft); border: 1px solid rgba(0,0,0,.04);
  border-radius: 24px; padding: 36px 40px;
}
.ia-obj-icon { font-size: 2.6rem; color: var(--ia-theme); }
.ia-obj h3 { margin: 0 0 8px; font-size: 1.25rem; color: var(--text-dark, #0d2137); }
.ia-obj p { margin: 0; color: var(--text-secondary, #51637a); line-height: 1.7; }

/* ── CTA ───────────────────────────────────────────────────────────── */
.ia-cta {
  background: linear-gradient(135deg, var(--ia-theme), var(--ia-theme-2));
  padding: 66px 0; text-align: center; color: #fff;
}
.ia-cta h2 { font-family: var(--font-display, sans-serif); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: #fff; margin: 0 0 12px; }
.ia-cta p { color: rgba(255,255,255,.9); font-size: 1.08rem; line-height: 1.6; max-width: 620px; margin: 0 auto 28px; }
.ia-cta .btn-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ── RESPONSIVE ────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .ia-args-grid { grid-template-columns: 1fr; }
  .ia-cases-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .ia-cases-grid { grid-template-columns: 1fr; }
  .ia-obj { grid-template-columns: 1fr; text-align: center; padding: 30px 24px; }
  .ia-pull { font-size: 1.05rem; padding: 20px 22px; }
}
