/* ============================================================
   PIXEL ÉTINCELLE — BASE
   Reset, typographie, utilitaires partagés par toutes les pages.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, picture, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-md); }

p { margin: 0 0 var(--space-4); color: var(--text-secondary); max-width: 68ch; }

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

ul, ol { padding-left: 1.2em; }

button { font-family: inherit; }

/* Focus visibility — never remove */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section-tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-tertiary { background: var(--bg-tertiary); }
.bg-elevated { background: var(--bg-elevated); }
/* Le site reste entièrement sombre — les sections varient seulement
   par la profondeur de surface (primary → elevated), jamais vers le clair. */

.grad-text {
  background: var(--pe-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-title);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--accent-primary);
  display: inline-block;
}

.section-sub {
  font-size: var(--fs-md);
  max-width: 640px;
  color: var(--text-secondary);
}

.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;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  background: var(--accent-primary);
  color: var(--pe-dark-900);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 700;
  z-index: var(--z-top);
  transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); }