/* =========================================================
   CASABIANCA — feuille de style principale
   Charte : brand book Casabianca
   - Titres : Microgramma (web : "Michroma", équivalent Google Fonts)
   - Texte  : Helvetica Neue
   - Couleurs : noir & blanc (la "maison blanche"), neutres méditerranéens
   ========================================================= */

/* ---------- 1. Variables (modifiez ici couleurs et polices) ---------- */
:root {
  --noir: #111111;
  --blanc: #ffffff;
  --creme: #f7f6f3;        /* fond des sections claires */
  --pierre: #e9e5de;       /* lignes, bordures douces */
  --gris: #5c5c5c;         /* texte secondaire */
  --font-titre: "Michroma", "Microgramma", "Eurostile", "Helvetica Neue", Arial, sans-serif;
  --font-texte: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --largeur: 1280px;
  --marge: clamp(16px, 4vw, 56px);
  --rayon: 28px;
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-texte);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.7;
  color: var(--noir);
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; }
p { margin: 0 0 1em; }
strong { font-weight: 600; }

h1, h2, h3, h4 {
  font-family: var(--font-titre);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: .01em;
  margin: 0 0 .7em;
}
h1 { font-size: clamp(1.6rem, 3.6vw, 2.9rem); }
h2 { font-size: clamp(1.25rem, 2.3vw, 1.85rem); }
h3 { font-size: clamp(1.02rem, 1.6vw, 1.25rem); }
h4 { font-size: .95rem; }

.surtitre {
  font-family: var(--font-texte);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gris);
  margin-bottom: 1.2em;
  display: block;
}

.conteneur { width: 100%; max-width: var(--largeur); margin: 0 auto; padding: 0 var(--marge); }
.section { padding: clamp(64px, 9vw, 120px) 0; }
.section--creme { background: var(--creme); }
.section--noir { background: var(--noir); color: var(--blanc); }
.centre { text-align: center; }
.etroit { max-width: 760px; margin-left: auto; margin-right: auto; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 999; background: #fff; padding: 8px 14px; }

/* ---------- 3. Boutons (pilule, comme le site actuel) ---------- */
.btn {
  display: inline-block;
  padding: 15px 52px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-texte);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background .25s, color .25s;
}
.btn:hover { background: var(--noir); color: var(--blanc); border-color: var(--noir); }
.btn--clair { color: var(--blanc); border-color: rgba(255,255,255,.75); }
.btn--clair:hover { background: var(--blanc); color: var(--noir); border-color: var(--blanc); }
.btn--plein { background: var(--noir); color: var(--blanc); border-color: var(--noir); }
.btn--plein:hover { background: transparent; color: var(--noir); }

/* ---------- 4. En-tête ---------- */
.entete { position: sticky; top: 0; z-index: 50; background: var(--blanc); box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.entete__haut { display: flex; align-items: center; justify-content: space-between; height: 92px; }
.logo img { height: 54px; width: auto; }
.langues { display: flex; gap: 28px; font-size: .8rem; }
.langue { position: relative; }
.langue > button {
  background: none; border: 0; font: inherit; cursor: pointer; padding: 8px 0; color: var(--noir);
}
.langue > button[aria-current="true"] { text-decoration: underline; text-underline-offset: 5px; }
.langue__menu {
  position: absolute; right: 0; top: 100%; min-width: 230px;
  background: var(--blanc); border: 1px solid var(--pierre); padding: 10px 0;
  list-style: none; margin: 0; opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: .2s; box-shadow: 0 12px 30px rgba(0,0,0,.08);
}
.langue:hover .langue__menu, .langue:focus-within .langue__menu, .langue.ouvert .langue__menu { opacity: 1; visibility: visible; transform: none; }
.langue__menu a { display: block; padding: 7px 20px; text-decoration: none; }
.langue__menu a:hover { background: var(--creme); }

.onglets { display: flex; gap: clamp(12px, 3vw, 48px); padding-bottom: 0; }
.onglets a {
  flex: 1; text-align: center; text-decoration: none; font-size: .78rem; font-weight: 400;
  padding: 6px 4px 8px; border-bottom: 2px solid var(--noir); white-space: nowrap;
  transition: background .2s;
}
.onglets a:hover, .onglets a[aria-current="page"] { background: var(--noir); color: var(--blanc); }

.burger { display: none; background: none; border: 0; width: 44px; height: 44px; cursor: pointer; padding: 10px 6px; }
.burger span { display: block; height: 1.5px; background: var(--noir); margin: 7px 0; transition: .3s; }
.menu-mobile { display: none; }

/* ---------- 5. Héros ---------- */
.heros {
  position: relative; min-height: min(86vh, 820px); color: var(--blanc);
  display: flex; align-items: stretch; overflow: hidden; background: #222;
}
.heros__media { position: absolute; inset: 0; }
.heros__media img, .heros__media video { width: 100%; height: 100%; object-fit: cover; }
.heros::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,.30), rgba(0,0,0,.10) 45%, rgba(0,0,0,.45)); }
.heros__contenu {
  position: relative; z-index: 1; width: 100%; display: grid;
  grid-template-columns: 1.2fr 1fr; grid-template-rows: auto 1fr auto;
  padding-top: clamp(32px, 5vw, 64px); padding-bottom: clamp(40px, 6vw, 72px);
}
.heros h1 { grid-column: 1; max-width: 15em; }
.heros__texte { grid-column: 2; grid-row: 3; font-size: 1.05rem; line-height: 1.65; }
.heros__texte .btn { margin-top: 2.2em; }
.heros--page { min-height: min(72vh, 680px); }
.heros--page .heros__contenu { grid-template-columns: 1fr; grid-template-rows: 1fr auto; text-align: left; }
.heros--page h1 { grid-row: 2; margin-bottom: .4em; }
.heros--page .heros__texte { grid-column: 1; grid-row: 3; max-width: 560px; }
.heros__sur { grid-row: 2; }

/* ---------- 6. Grilles ---------- */
.grille-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 40px); }
.grille-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.grille-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(20px, 3vw, 36px); }
.intro-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: clamp(24px, 4vw, 56px); font-size: .92rem; }
.intro-3 h2 { margin: 0; }

/* ---------- 7. Formes d'images (signature du site) ---------- */
.forme { overflow: hidden; background: var(--pierre); }
.forme img { width: 100%; height: 100%; object-fit: cover; }
.forme--coin { border-radius: var(--rayon) var(--rayon) var(--rayon) 0; }
.forme--ovale { border-radius: 50% / 46%; }
.forme--vague { border-radius: 0 0 100% 0 / 0 0 55% 0; }
.forme--arche { border-radius: 999px 999px 0 0; }
.forme--arche-pleine { border-radius: 50% 50% 46% 46% / 38% 38% 32% 32%; }
.ratio-carte { aspect-ratio: 4 / 4.6; }
.ratio-paysage { aspect-ratio: 3 / 2; }
.ratio-portrait { aspect-ratio: 4 / 5; }
.ratio-carre { aspect-ratio: 1; }

/* ---------- 8. Cartes services ---------- */
.carte h2 { margin: 22px 0 18px; }
.carte p { font-size: .88rem; min-height: 6.5em; }
.carte .btn { margin-top: 16px; padding: 15px 0; width: 72%; text-align: center; text-transform: none; letter-spacing: .02em; font-size: .85rem; }

/* ---------- 9. Galerie ---------- */
.galerie { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.galerie figure { margin: 0; aspect-ratio: 4 / 3; overflow: hidden; background: var(--pierre); }
.galerie img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.galerie figure:hover img { transform: scale(1.04); }

/* ---------- 10. Formulaire ---------- */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 16px; font-size: .82rem; }
.form .plein { grid-column: 1 / -1; }
.form label { display: block; margin-bottom: 6px; }
.form label small { color: var(--gris); font-size: .72rem; margin-left: 4px; }
.form input, .form textarea, .form select {
  width: 100%; font: inherit; font-size: .95rem; padding: 10px 12px;
  border: 1px solid #9a9a9a; border-radius: 0; background: var(--blanc); color: var(--noir);
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--noir); outline-offset: 1px; }
.form textarea { min-height: 130px; resize: vertical; }
.form legend { font-size: .82rem; margin-bottom: 8px; padding: 0; }
.form fieldset { border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form .btn { justify-self: start; }
.form .piege { display: none; }

/* ---------- 11. Équipe ---------- */
.equipe { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.membre img { width: 100%; max-width: 280px; aspect-ratio: 1; object-fit: cover; margin-bottom: 18px; background: var(--pierre); }
.membre h3 { font-size: 1rem; margin: 0 0 4px; }
.membre .role { font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; display: block; margin-bottom: 12px; }
.membre p { font-size: .86rem; }

/* ---------- 12. Étapes / méthode ---------- */
.etape { border-top: 1px solid var(--noir); padding-top: 22px; }
.etape__num { font-family: var(--font-titre); font-size: .85rem; display: block; margin-bottom: 14px; }
.etape h3 { font-size: 1rem; }
.etape p { font-size: .88rem; }

/* ---------- 13. Citation ---------- */
.citation { position: relative; min-height: 460px; display: flex; align-items: center; justify-content: center; color: var(--blanc); text-align: center; overflow: hidden; }
.citation img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.citation::after { content: ""; position: absolute; inset: 0; background: rgba(0,0,0,.38); }
.citation blockquote { position: relative; z-index: 1; margin: 0; padding: 0 var(--marge); font-family: var(--font-titre); font-size: clamp(1.2rem, 2.6vw, 2rem); line-height: 1.4; max-width: 900px; }

/* ---------- 14. Icônes expertise ---------- */
.expertises { display: grid; grid-template-columns: repeat(5, 1fr); gap: 28px; text-align: center; }
.expertises img { width: 100%; max-width: 190px; margin: 0 auto; mix-blend-mode: multiply; }
.expertises span { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; }

/* ---------- 15. Services (cartes texte) ---------- */
.service { background: var(--blanc); padding: 36px 30px; border-radius: var(--rayon) var(--rayon) var(--rayon) 0; }
.section--creme .service { background: var(--blanc); }
.service h3 { font-size: 1rem; }
.service p { font-size: .9rem; margin: 0; }

/* ---------- 16. Biens / secteurs ---------- */
.secteur { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(28px, 5vw, 80px); align-items: center; padding: clamp(40px, 5vw, 64px) 0; border-top: 1px solid var(--pierre); }
.secteur:nth-child(even) .secteur__img { order: 2; }
.badge { display: inline-block; font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; border: 1px solid var(--noir); border-radius: 999px; padding: 5px 14px; margin-bottom: 18px; }

/* ---------- 17. Pied de page ---------- */
.pied { background: var(--blanc); border-top: 1px solid var(--pierre); padding: 56px 0 28px; font-size: .82rem; }
.pied__grille { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; align-items: start; }
.pied__logo img { width: 240px; height: auto; }
.pied h4 { font-family: var(--font-titre); font-size: .85rem; margin-bottom: 1.2em; }
.pied p { margin: 0 0 .5em; }
.pied a { text-decoration: none; }
.pied a:hover { text-decoration: underline; }
.pied__bas { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--pierre); color: var(--gris); font-size: .74rem; }

/* ---------- 18. Animations douces à l'apparition ---------- */
.apparition { opacity: 0; transform: translateY(24px); transition: opacity .9s ease, transform .9s ease; }
.apparition.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .apparition { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ---------- 19. Responsive ---------- */
@media (max-width: 960px) {
  .intro-3, .grille-3, .equipe { grid-template-columns: 1fr 1fr; }
  .intro-3 h2 { grid-column: 1 / -1; }
  .grille-4 { grid-template-columns: 1fr 1fr; }
  .expertises { grid-template-columns: repeat(3, 1fr); }
  .heros__contenu { grid-template-columns: 1fr; }
  .heros__texte { grid-column: 1; }
  .pied__grille { grid-template-columns: 1fr 1fr; }
  .pied__logo { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .entete__haut { height: 72px; }
  .logo img { height: 40px; }
  .langues, .onglets { display: none; }
  .burger { display: block; }
  .menu-mobile {
    display: block; position: fixed; inset: 72px 0 0 0; background: var(--blanc);
    padding: 24px var(--marge) 48px; overflow-y: auto;
    transform: translateX(100%); transition: transform .35s ease; visibility: hidden;
  }
  .menu-ouvert .menu-mobile { transform: none; visibility: visible; }
  .menu-ouvert .burger span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
  .menu-ouvert .burger span:nth-child(2) { opacity: 0; }
  .menu-ouvert .burger span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }
  .menu-mobile a { display: block; padding: 14px 0; border-bottom: 1px solid var(--pierre); text-decoration: none; font-family: var(--font-titre); font-size: 1rem; }
  .menu-mobile .groupe { margin: 28px 0 6px; font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gris); }
  .intro-3, .grille-3, .grille-2, .grille-4, .equipe, .galerie, .secteur, .form, .form fieldset { grid-template-columns: 1fr; }
  .secteur:nth-child(even) .secteur__img { order: 0; }
  .expertises { grid-template-columns: 1fr 1fr; }
  .carte p { min-height: 0; }
  .carte .btn { width: 100%; }
  .heros { min-height: 78vh; }
  .heros__texte { font-size: .98rem; }
  .pied__grille { grid-template-columns: 1fr; }
  .galerie { gap: 10px; }
  .btn { padding: 14px 36px; }
}