/* =========================================================
   CHARTE GRAPHIQUE
   Blanc + vert clair, touches de vert foncé
   ========================================================= */
:root {
  --white: #ffffff;
  --green-50: #f1f9f3;   /* fond très clair */
  --green-100: #dff1e4;  /* vert clair */
  --green-200: #bfe3c9;
  --green-400: #6cc28a;  /* accent clair */
  --green-700: #2e7d4f;  /* vert foncé */
  --green-900: #1d5235;  /* vert très foncé */
  --text: #1f2d26;
  --text-soft: #5b6b62;
  --border: #e3ece6;

  --radius: 14px;
  --shadow: 0 6px 24px rgba(29, 82, 53, 0.08);
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

h1, h2, h3 { font-family: 'Poppins', sans-serif; line-height: 1.2; color: var(--green-900); }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.container { width: min(1140px, 100% - 32px); margin-inline: auto; }

/* ===== BOUTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600; font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .2s, color .2s, transform .15s, box-shadow .2s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn--dark { background: var(--green-700); color: var(--white); }
.btn--dark:hover { background: var(--green-900); box-shadow: 0 6px 16px rgba(46,125,79,.25); }
.btn--ghost { border-color: var(--green-700); color: var(--green-700); background: transparent; }
.btn--ghost:hover { background: var(--green-100); }
.btn--light { background: var(--white); color: var(--green-900); }
.btn--light:hover { background: var(--green-100); }
.btn--full { width: 100%; justify-content: center; }

.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--green-100);
  color: var(--green-700);
  font-size: .8rem; font-weight: 600;
  letter-spacing: .02em;
  margin-bottom: 14px;
}
.tag--light { background: rgba(255,255,255,.15); color: var(--white); }

/* ===== BANDEAU / HEADER ===== */
.header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .2s;
}
.header.scrolled { box-shadow: 0 4px 20px rgba(29,82,53,.08); }
.header__inner { height: 100%; display: flex; align-items: center; gap: 24px; }

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo__icon {
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--green-700); color: var(--white);
}
.logo__text { font-family: 'Poppins', sans-serif; font-weight: 700; color: var(--green-900); line-height: 1.1; font-size: 1rem; }
.logo__text small { display: block; font-family: 'Inter', sans-serif; font-weight: 500; color: var(--text-soft); font-size: .75rem; }

.nav { margin-left: auto; }
.nav__list { display: flex; gap: 4px; list-style: none; }
.nav__link {
  display: block; padding: 8px 14px; border-radius: 999px;
  font-weight: 500; font-size: .93rem; color: var(--text-soft);
  transition: background .2s, color .2s; white-space: nowrap;
}
.btn, .logo__text { white-space: nowrap; }
.nav__link:hover { color: var(--green-700); background: var(--green-50); }
.nav__link.active { color: var(--green-700); background: var(--green-100); }
.nav__login { display: none; }

.burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; margin-left: auto; }
.burger span { display: block; width: 24px; height: 2px; background: var(--green-900); margin: 5px 0; border-radius: 2px; transition: .25s; }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  background:
    radial-gradient(circle at 85% 20%, var(--green-100) 0, transparent 45%),
    linear-gradient(180deg, var(--green-50), var(--white));
  padding: 90px 0 100px;
}
.hero__inner { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); margin-bottom: 18px; }
.accent { color: var(--green-700); }
.hero__lead { font-size: 1.1rem; color: var(--text-soft); max-width: 540px; margin-bottom: 30px; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero__card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  padding: 24px; background: var(--white);
  border-radius: 20px; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.stat { padding: 20px; border-radius: var(--radius); background: var(--green-50); text-align: center; }
.stat__value { display: block; font-family: 'Poppins', sans-serif; font-size: 2rem; font-weight: 700; color: var(--green-700); }
.stat__label { font-size: .88rem; color: var(--text-soft); }

/* ===== SECTIONS ===== */
.section { padding: 90px 0; }
.section--tinted { background: var(--green-50); }
.section__head { text-align: center; max-width: 640px; margin: 0 auto 50px; }
.section__head h2, .split h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 12px; }
.section__head p { color: var(--text-soft); }

.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  padding: 30px; background: var(--white);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__icon {
  width: 50px; height: 50px; border-radius: 12px;
  background: var(--green-100); color: var(--green-700);
  display: grid; place-items: center; margin-bottom: 18px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p { color: var(--text-soft); font-size: .95rem; }

/* Split (texte + visuel) */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split__text p { color: var(--text-soft); margin-bottom: 20px; }
.checklist { list-style: none; margin-bottom: 28px; }
.checklist li { position: relative; padding-left: 32px; margin-bottom: 10px; }
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--green-700); color: var(--white);
  font-size: .75rem; display: grid; place-items: center; font-weight: 700;
}
.mini-list { display: grid; gap: 12px; }
.mini-list__item {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 20px; background: var(--white);
  border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(29,82,53,.04);
}
.mini-list__item strong { display: block; color: var(--green-900); font-size: .97rem; }
.mini-list__item small { color: var(--text-soft); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green-400); flex-shrink: 0; box-shadow: 0 0 0 5px var(--green-100); }

/* Étapes */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.step {
  position: relative; padding: 28px 24px;
  border-radius: var(--radius); border: 1px solid var(--border); background: var(--white);
}
.step__num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--green-700); color: var(--white);
  display: grid; place-items: center; font-weight: 700; margin-bottom: 16px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 6px; }
.step p { color: var(--text-soft); font-size: .93rem; }

/* Timeline */
.timeline { max-width: 720px; margin: 0 auto; position: relative; }
.timeline::before { content: ""; position: absolute; left: 60px; top: 10px; bottom: 10px; width: 2px; background: var(--green-200); }
.timeline__item { display: flex; gap: 40px; align-items: flex-start; padding: 14px 0; position: relative; }
.timeline__date {
  width: 120px; flex-shrink: 0; text-align: center;
  padding: 6px 0; border-radius: 999px;
  background: var(--green-700); color: var(--white);
  font-weight: 600; font-size: .85rem; position: relative; z-index: 1;
  margin-left: 0;
}
.timeline__item h3 { font-size: 1.05rem; margin-bottom: 4px; }
.timeline__item p { color: var(--text-soft); font-size: .93rem; }

/* Contact */
.contact {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  padding: 50px; border-radius: 24px;
  background: linear-gradient(135deg, var(--green-700), var(--green-900));
  color: var(--white);
}
.contact h2 { color: var(--white); font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 10px; }
.contact p { opacity: .85; }
.contact__form { display: grid; gap: 12px; }
.contact__form input, .contact__form textarea {
  width: 100%; padding: 12px 16px; border-radius: 10px;
  border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.1);
  color: var(--white); font: inherit; resize: vertical;
}
.contact__form ::placeholder { color: rgba(255,255,255,.65); }
.contact__form input:focus, .contact__form textarea:focus { outline: 2px solid var(--green-400); }
.contact__form .btn { justify-self: start; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 26px 0; font-size: .9rem; color: var(--text-soft); }
.footer__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a:hover { color: var(--green-700); }

/* ===== MODAL CONNEXION ===== */
.modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 16px; opacity: 0; pointer-events: none; transition: opacity .2s; }
.modal.open { opacity: 1; pointer-events: auto; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(29,82,53,.35); backdrop-filter: blur(3px); }
.modal__box {
  position: relative; width: min(420px, 100%);
  background: var(--white); border-radius: 20px; padding: 36px;
  box-shadow: 0 20px 60px rgba(0,0,0,.15);
  transform: translateY(12px); transition: transform .2s;
}
.modal.open .modal__box { transform: none; }
.modal__close { position: absolute; top: 14px; right: 16px; background: none; border: 0; font-size: 1.6rem; color: var(--text-soft); cursor: pointer; }
.modal__box h2 { margin-bottom: 4px; }
.modal__sub { color: var(--text-soft); font-size: .92rem; margin-bottom: 22px; }
.modal__box form { display: grid; gap: 14px; }
.modal__box label { display: grid; gap: 6px; font-size: .88rem; font-weight: 600; color: var(--green-900); }
.modal__box input { padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); font: inherit; background: var(--green-50); }
.modal__box input:focus { outline: 2px solid var(--green-400); background: var(--white); }

.modal__demo { margin-top: 18px; display: grid; gap: 8px; }
.modal__demo span {
  display: flex; align-items: center; gap: 10px;
  font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-soft);
}
.modal__demo span::before, .modal__demo span::after { content: ""; flex: 1; height: 1px; background: var(--border); }

.login-erreur { color: #b3412f; font-size: .88rem; }
.login-aide { margin-top: 16px; font-size: .8rem; color: var(--text-soft); line-height: 1.5; }
.login-aide code { background: var(--green-50); color: var(--green-900); padding: 1px 6px; border-radius: 5px; }

/* ===== ANIMATION D'APPARITION ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1080px) {
  .header__login { display: none; }
  .burger { display: block; }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--border);
    padding: 16px; box-shadow: 0 10px 30px rgba(29,82,53,.1);
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .nav.open { opacity: 1; visibility: visible; transform: none; }
  .nav__list { flex-direction: column; }
  .nav__link { padding: 12px 16px; }
  .nav__login { display: flex; justify-content: center; margin-top: 12px; }
}
@media (max-width: 960px) {

  .hero__inner, .split, .contact { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .hero { padding: 60px 0 70px; }
  .section { padding: 64px 0; }
  .steps { grid-template-columns: 1fr; }
  .contact { padding: 32px 22px; }
  .timeline::before { left: 45px; }
  .timeline__item { gap: 18px; }
  .timeline__date { width: 90px; }
}

/* ===== MAQUETTE (3 phases) ===== */
.steps--3 { grid-template-columns: repeat(3, 1fr); }
.step__meta {
  display: inline-block; margin-bottom: 10px;
  font-size: .8rem; font-weight: 600; color: var(--green-700);
  background: var(--green-100); padding: 3px 10px; border-radius: 999px;
}
.step__list { list-style: none; margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--green-200); }
.step__list li { position: relative; padding-left: 18px; font-size: .9rem; color: var(--text); margin-bottom: 6px; }
.step__list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 8px; height: 8px; border-radius: 50%; background: var(--green-400); }
@media (max-width: 960px) { .steps--3 { grid-template-columns: 1fr; } }