/* ============================================================
   base.css — reset léger, typographie et styles globaux (§A)
   ============================================================ */

/* ---- Reset léger ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden; /* aucun débordement horizontal */
}

img, svg, video { display: block; max-width: 100%; }
img { height: auto; }

a { color: inherit; text-decoration: none; }

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

ul, ol { list-style: none; padding: 0; }

/* ---- Titres ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--c-text);
}
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); font-weight: var(--fw-bold); }

p { color: var(--c-text-2); }

/* ---- Utilitaires de mise en page ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: var(--sp-9); }
.section--tight { padding-block: var(--sp-8); }

/* Fonds de section */
.bg-blue { background: var(--c-bg-blue); }
.bg-card { background: var(--c-bg-card); }

/* ---- Eyebrow / tag uppercase ---- */
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--c-blue);
}

/* ---- Accessibilité : focus visibles ---- */
:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 3px solid var(--c-blue);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Lien d'évitement */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--c-blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 var(--r-sm) 0;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

/* Contenu réservé aux lecteurs d'écran */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---- Reveal au scroll (progressif, via IntersectionObserver) ---- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
/* Cascade : on décale les enfants directement marqués */
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}