/* ============================================================
   layout.css — conteneurs, grilles de page, en-tête, pied.
   ============================================================ */

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ---------- sections ---------- */
section { position: relative; }

section[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

.sec { padding-block: clamp(72px, 9vw, 118px); }

.sec-head { margin-bottom: clamp(38px, 5vw, 58px); }

.sec-head h2 { font-size: clamp(1.5rem, 3.4vw, 2.7rem); }

.sec-head p {
  color: var(--muted);
  margin: 18px 0 0;
  max-width: 56ch;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- en-tête ---------- */
.hdr {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgb(16 18 22 / 72%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}

.hdr.is-stuck {
  border-bottom-color: var(--line);
  background: rgb(16 18 22 / 92%);
}

.hdr .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

/* Décale le contenu sous l'en-tête fixe (pages intérieures). */
.page-offset { padding-top: var(--header-h); }

/* ---------- héros ---------- */
.hero {
  position: relative;
  padding: 104px 0 96px;
  overflow: hidden;
}

.hero .wrap {
  position: relative;
  z-index: 1;
}

/* ---------- grilles ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.formats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
  margin: 0;
  padding: 34px 0 0;
  list-style: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}

/* ---------- pied de page ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 40px;
  background: var(--ink-4);
}

.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.foot nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

/* ============================================================
   Points de rupture
   ============================================================ */

@media (width <= 960px) {
  .cards         { grid-template-columns: repeat(2, 1fr); }
  .steps         { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
  .steps::before { display: none; }
  .contact-grid  { grid-template-columns: 1fr; }
  .formats       { grid-template-columns: 1fr; }
}

@media (width <= 720px) {
  .cards { grid-template-columns: 1fr; }
  .hero  { padding: 88px 0 72px; }
}

@media (width <= 560px) {
  .steps { grid-template-columns: 1fr; gap: 28px; }
  .foot  { flex-direction: column; align-items: flex-start; gap: 20px; }
}