/* Site Chantiplan : polices du système (aucun appel à un service extérieur) */
:root {
  --fond: #f4f6f9; --papier: #ffffff; --encre: #17212e; --doux: #4f5d70; --trait: #d6dde6;
  --bleu: #3a6ea5; --bleu-fonce: #2c5b8c; --bleu-clair: #e4edf7;
  --vert: #2f7f76; --vert-clair: #e1f1ef; --ambre-clair: #fbf0dc; --ambre: #8a4f06;
  --sur-bleu: #ffffff;
  --texte: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --rayon: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #10161e; --papier: #18212c; --encre: #e6ebf1; --doux: #a3b0c0; --trait: #2a3646;
    --bleu: #82abdd; --bleu-fonce: #9dbde6; --bleu-clair: #1c2b3e;
    --vert: #5cc2b5; --vert-clair: #15302d; --ambre-clair: #33270f; --ambre: #f0b25c;
    --sur-bleu: #0d1520;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--fond); color: var(--encre); font: 17px/1.6 var(--texte); }
img, svg { max-width: 100%; }
a { color: var(--bleu); }
h1, h2, h3 { line-height: 1.2; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0; }
.largeur { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.evitement { position: absolute; left: -999px; }
.evitement:focus { left: 16px; top: 8px; background: var(--papier); padding: 8px 12px; z-index: 10; }
:focus-visible { outline: 3px solid var(--bleu); outline-offset: 2px; }

/* En-tête */
.entete { background: var(--papier); border-bottom: 1px solid var(--trait); position: sticky; top: 0; z-index: 5; }
.entete-ligne { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.marque { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem;
          color: var(--encre); text-decoration: none; }
.logo { width: 34px; height: 34px; flex: none; }
.menu { display: flex; gap: 20px; margin-left: auto; }
.menu a, .menu-mobile nav a { color: var(--encre); text-decoration: none; font-weight: 600; font-size: .97rem; }
.menu a:hover, .menu a[aria-current] { color: var(--bleu); }
.menu-mobile { display: none; margin-left: auto; position: relative; }
.menu-mobile summary { cursor: pointer; font-weight: 600; list-style: none; padding: 8px 12px;
                       border: 1px solid var(--trait); border-radius: 8px; }
.menu-mobile summary::-webkit-details-marker { display: none; }
.menu-mobile nav { position: absolute; right: 0; top: 46px; background: var(--papier); border: 1px solid var(--trait);
                   border-radius: var(--rayon); padding: 12px 16px; display: grid; gap: 10px; min-width: 220px;
                   box-shadow: 0 8px 24px rgba(0,0,0,.12); }
@media (max-width: 860px) {
  .menu { display: none; }
  .menu-mobile { display: block; }
  .entete .bouton.petit { display: none; }
}

/* Boutons */
.bouton { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--bleu);
          color: var(--sur-bleu); text-decoration: none; font-weight: 700; padding: 13px 22px; border-radius: 10px;
          border: 2px solid var(--bleu); font-size: 1rem; cursor: pointer; font-family: inherit; }
.bouton:hover { background: var(--bleu-fonce); border-color: var(--bleu-fonce); }
.bouton.secondaire { background: transparent; color: var(--bleu); }
.bouton.secondaire:hover { background: var(--bleu-clair); }
.bouton.petit { padding: 8px 14px; font-size: .95rem; }
.boutons { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
.section { padding: 64px 0; }
.section.claire { background: var(--papier); border-block: 1px solid var(--trait); }
.section .largeur { display: grid; gap: 28px; }
.intro { display: grid; gap: 12px; max-width: 720px; }
.intro p { color: var(--doux); font-size: 1.08rem; }
.etiquette { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--vert); }

/* Accueil */
.heros { padding: 72px 0 56px; }
.heros .largeur { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 48px; align-items: center; }
.heros p.chapeau { font-size: 1.2rem; color: var(--doux); max-width: 34em; }
.heros .texte { display: grid; gap: 22px; }
.heros .rassurance { font-size: .95rem; color: var(--doux); }
@media (max-width: 860px) { .heros .largeur { grid-template-columns: minmax(0, 1fr); } }

/* Maquette d'écran (dessinée en CSS) */
.ecran { background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon);
         box-shadow: 0 18px 40px rgba(23,33,46,.12); overflow: hidden; }
.ecran .barre { display: flex; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--trait); }
.ecran .barre span { width: 10px; height: 10px; border-radius: 50%; background: var(--trait); }
.ecran .corps { display: grid; grid-template-columns: 34% 66%; min-height: 260px; }
.ecran .lateral { background: var(--bleu-clair); padding: 14px; display: grid; gap: 8px; align-content: start; font-size: .82rem; }
.ecran .lateral b { color: var(--bleu); }
.ecran .principal { padding: 16px; display: grid; gap: 10px; align-content: start; font-size: .85rem; }
.ecran .ligne { display: flex; justify-content: space-between; gap: 8px; padding: 8px 10px; border: 1px solid var(--trait); border-radius: 8px; }
.ecran .ok { color: var(--vert); font-weight: 700; }
.ecran .total { font-weight: 800; font-size: 1.05rem; text-align: right; padding-top: 6px; }

/* Grilles de cartes */
.cartes { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.carte { background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon); padding: 22px; display: grid; gap: 8px; align-content: start; }
.section.claire .carte { background: var(--fond); }
.carte p, .carte li { color: var(--doux); }
.carte ul { margin: 0; padding-left: 1.1em; display: grid; gap: 4px; }
.pastille { width: 40px; height: 40px; border-radius: 10px; background: var(--bleu-clair); color: var(--bleu);
            display: grid; place-items: center; font-weight: 800; }

/* Bandeau */
.bandeau { background: var(--bleu); color: var(--sur-bleu); border-radius: var(--rayon); padding: 36px; display: grid; gap: 14px; justify-items: start; }
.bandeau p { opacity: .92; max-width: 46em; }
.bandeau .bouton { background: var(--sur-bleu); color: var(--bleu); border-color: var(--sur-bleu); }

/* Tarifs */
.formules { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; max-width: 900px; }
@media (max-width: 760px) { .formules { grid-template-columns: minmax(0, 1fr); } }
.formule { background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon); padding: 28px; display: grid; gap: 14px; align-content: start; }
.formule.phare { border: 2px solid var(--bleu); }
.formule .prix { font-size: 2.6rem; font-weight: 800; line-height: 1; }
.formule .prix small { font-size: 1rem; font-weight: 400; color: var(--doux); }
.formule .annuel, .formule .pour { color: var(--doux); }
.formule ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.lancement { background: var(--vert-clair); border-radius: var(--rayon); padding: 22px 26px; display: grid; gap: 6px; max-width: 900px; }
.lancement h2 { font-size: 1.25rem; color: var(--vert); }
table { width: 100%; border-collapse: collapse; background: var(--papier); border-radius: var(--rayon); overflow: hidden; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--trait); vertical-align: top; }
th { color: var(--doux); font-weight: 600; font-size: .95rem; }
td.oui { color: var(--vert); font-weight: 700; }
.defilement { overflow-x: auto; border: 1px solid var(--trait); border-radius: var(--rayon); }

/* Questions */
.questions { display: grid; gap: 10px; max-width: 820px; }
.questions details { background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon); padding: 16px 20px; }
.questions summary { cursor: pointer; font-weight: 700; }
.questions details p { margin-top: 10px; color: var(--doux); }

/* Texte long (pages légales…) */
.texte-long { max-width: 780px; display: grid; gap: 14px; }
.texte-long h2 { font-size: 1.3rem; margin-top: 18px; }
.texte-long ul { margin: 0; padding-left: 1.2em; display: grid; gap: 4px; }
.a-completer { background: var(--ambre-clair); color: var(--ambre); padding: 0 4px; border-radius: 4px; font-weight: 600; }
.note { background: var(--ambre-clair); border-radius: var(--rayon); padding: 14px 18px; }

/* Étapes numérotées */
.etapes { list-style: none; counter-reset: etape; margin: 0; padding: 0; display: grid; gap: 14px; max-width: 820px; }
.etapes li { counter-increment: etape; background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon);
             padding: 18px 20px 18px 64px; position: relative; }
.etapes li::before { content: counter(etape); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; border-radius: 50%;
                     background: var(--bleu); color: var(--sur-bleu); display: grid; place-items: center; font-weight: 800; }
.etapes li p { color: var(--doux); }

/* Formulaire d'inscription */
.formulaire { background: var(--papier); border: 1px solid var(--trait); border-radius: var(--rayon); padding: 28px; display: grid; gap: 16px; max-width: 640px; }
.champs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 620px) { .champs { grid-template-columns: minmax(0, 1fr); } }
.champ { display: grid; gap: 6px; }
.champ.large { grid-column: 1 / -1; }
.champ label, fieldset legend { font-weight: 600; }
.champ small { color: var(--doux); }
input[type=text], input[type=email], input[type=tel], input[type=password], textarea {
  font: inherit; color: inherit; background: var(--fond); border: 1px solid var(--trait); border-radius: 8px; padding: 10px 12px; width: 100%; }
fieldset { border: 1px solid var(--trait); border-radius: 8px; padding: 12px 14px; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.case { display: flex; gap: 10px; align-items: flex-start; }
.case input { margin-top: 5px; }
.piege { position: absolute; left: -5000px; width: 1px; height: 1px; overflow: hidden; }
.message { border-radius: 8px; padding: 12px 14px; }
.message.erreur { background: var(--ambre-clair); color: var(--ambre); }
.message.reussite { background: var(--vert-clair); }
.message.reussite code { font-size: 1.1rem; font-weight: 800; }
[hidden] { display: none !important; }

/* Pied de page */
.pied { background: var(--papier); border-top: 1px solid var(--trait); padding: 40px 0 20px; margin-top: 40px; }
.pied-grille { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.pied-grille > div { display: grid; gap: 10px; align-content: start; }
.pied-grille p { color: var(--doux); font-size: .95rem; max-width: 30em; }
.pied nav { display: grid; gap: 6px; align-content: start; font-size: .95rem; }
.pied nav h2 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--doux); }
.pied nav a { color: var(--encre); text-decoration: none; overflow-wrap: anywhere; }
.pied nav a:hover { color: var(--bleu); }
.copyright { color: var(--doux); font-size: .85rem; margin-top: 24px; }
@media (max-width: 760px) { .pied-grille { grid-template-columns: minmax(0, 1fr); } }

/* Mon abonnement (espace client) */
.espace-client { display: grid; gap: 20px; max-width: 760px; }
.espace-client .formulaire { max-width: none; }
.ligne-titre { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.pastille-statut { font-size: .85rem; font-weight: 700; border-radius: 999px; padding: 3px 12px; background: var(--bleu-clair); color: var(--bleu); }
.pastille-statut.reussite { background: var(--vert-clair); color: var(--vert); }
.pastille-statut.erreur { background: var(--ambre-clair); color: var(--ambre); }
.composer fieldset { display: grid; gap: 10px; }
.case.choix span { display: grid; gap: 2px; }
.case.choix small, .petit-texte { color: var(--doux); font-size: .88rem; }
.case input:disabled + span { opacity: .75; }
.lancement-note { background: var(--vert-clair); border-radius: 8px; padding: 10px 14px; font-weight: 600; }
.recap table { width: 100%; border-collapse: collapse; }
.recap td { padding: 8px 0; border-bottom: 1px solid var(--trait); }
.recap td:last-child { text-align: right; white-space: nowrap; padding-left: 12px; }
.recap .remise td { color: var(--vert); }
.recap .sous-total td { font-weight: 700; }
.recap .total td { font-weight: 800; font-size: 1.15rem; border-bottom: 0; }
.lien-bouton { background: none; border: 0; padding: 0; color: var(--bleu); text-decoration: underline; cursor: pointer; font: inherit; }

/* Lien « Se connecter » de l'en-tête (logiciel dans le navigateur) */
.lien-connexion { font-weight: 600; text-decoration: none; white-space: nowrap; }
@media (max-width: 860px) { .lien-connexion { margin-left: auto; } }