/* ══════════════════════════════════════════
   BASE — Reset · Typographie · Utilitaires
══════════════════════════════════════════ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: clip; }
body {
  font-family: var(--font);
  background: var(--surface);
  color: var(--on-surface);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(18,102,194,.15); }
a  { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul  { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

::-webkit-scrollbar       { width: 5px; }
::-webkit-scrollbar-track { background: var(--surf-ct-low); }
::-webkit-scrollbar-thumb { background: var(--outline); border-radius: var(--r-full); }

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.section    { padding: 120px 0; }
.section-sm { padding: 60px 0; }
.section-alt { background: var(--surf-ct-low); }

/* ── Typographie ── */
.display-lg {
  font-family: var(--font-display);
  font-size: var(--display-lg);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.display-md {
  font-family: var(--font-display);
  font-size: var(--display-md);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.018em;
}
.display-sm {
  font-family: var(--font-display);
  font-size: var(--display-sm);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.028em;
}

/* ── Kicker : discret, sans trait ── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border-radius: 10px 16px 16px 16px;
  background: var(--primary-container);
  font-size: var(--label-md);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}

.grad-text {
  color: transparent;
  background: linear-gradient(100deg, var(--primary), var(--brand-violet));
  -webkit-background-clip: text;
  background-clip: text;
}

/* ── Tête de section ── */
.section-head { max-width: 720px; margin-bottom: 60px; }
.section-sub {
  font-size: var(--body-lg);
  line-height: 1.75;
  color: var(--on-surface-var);
  margin-top: 14px;
  max-width: 540px;
}

/* ── Boutons : un seul style fort ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font);
  font-size: var(--label-lg);
  font-weight: 600;
  padding: 0 26px;
  height: 48px;
  border-radius: var(--r-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-1) var(--ease-std),
              color var(--dur-1) var(--ease-std),
              border-color var(--dur-1) var(--ease-std),
              transform var(--dur-1) var(--ease-std),
              box-shadow var(--dur-1) var(--ease-std);
  white-space: nowrap;
  text-decoration: none;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn-filled {
  background: var(--primary);
  color: #fff;
}
.btn-filled:hover { background: var(--primary-d); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(23,105,224,.2); }

.btn-ghost {
  background: transparent;
  color: var(--on-surface);
  border-color: var(--surf-ct-high);
}
.btn-ghost:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ── Lien texte avec flèche ── */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: var(--label-lg);
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--dur-1) var(--ease-std), color var(--dur-1);
}
.link-arrow svg { width: 15px; height: 15px; }
.link-arrow:hover { gap: 11px; }

/* ── Chips ── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 6px 12px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,.94);
  color: var(--on-surface);
}

/* ── Blocs de langue ── */
html.en .lang-fr { display: none; }
html:not(.en) .lang-en { display: none; }

/* ── Reveal : discret ── */
.rv, .rv-l, .rv-r, .rv-s {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-4) var(--ease-dec), transform var(--dur-4) var(--ease-dec);
}
.rv.on, .rv-l.on, .rv-r.on, .rv-s.on { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .rv, .rv-l, .rv-r, .rv-s { opacity: 1; transform: none; transition: none; }
}

/* ── Focus ── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .section    { padding: 72px 0; }
  .section-sm { padding: 48px 0; }
  .section-head { margin-bottom: 40px; }
}
@media (max-width: 600px) {
  .section    { padding: 56px 0; }
  .section-sm { padding: 40px 0; }
}