/* Polices hébergées localement (aucune requête vers un serveur tiers) */
@font-face {
  font-family: "Newsreader"; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url("fonts/newsreader-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Newsreader"; font-style: italic; font-weight: 400 500; font-display: swap;
  src: url("fonts/newsreader-italic-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Public Sans"; font-style: normal; font-weight: 400 600; font-display: swap;
  src: url("fonts/public-sans-latin.woff2") format("woff2");
}

:root {
  --paper: #f3f7f2;
  --paper-2: #e2eee4;
  --white: #fbfdfa;
  --ink: #0e1f17;
  --muted: #55645a;
  --rule: #c7d8ca;
  --green: #0a5a41;
  --green-2: #04382a;
  --accent: #0a6b4b;
  --mint: #5eeaa8;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0 0 .5em; letter-spacing: -.015em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); line-height: 1.04; letter-spacing: -.025em; }
h1 em { font-style: italic; color: var(--green); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); line-height: 1.12; }
h3 { font-size: 1.35rem; line-height: 1.25; }

.container { width: min(1140px, 100% - 48px); margin-inline: auto; }
.kicker {
  font-size: .8rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.1em;
}

/* Boutons */
.btn {
  display: inline-block; padding: .95em 1.6em; border: 1px solid var(--ink); border-radius: 2px;
  background: var(--ink); color: var(--paper); font: 600 .95rem var(--sans); cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.btn:hover { background: var(--green); border-color: var(--green); }
.btn-small { padding: .6em 1.1em; font-size: .88rem; }
.btn-outline { background: transparent; color: var(--ink); text-align: center; }
.btn-outline:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-light { background: var(--paper); color: var(--green-2); border-color: var(--paper); text-align: center; }
.btn-light:hover { background: transparent; color: var(--paper); border-color: var(--paper); }
.link-arrow { font-weight: 600; border-bottom: 1px solid currentColor; padding-bottom: 2px; }
.link-arrow::after { content: " →"; }
.link-arrow:hover { color: var(--green); }

/* En-tête */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(243,247,242,.92); backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent; transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: var(--rule); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { font-family: var(--serif); font-size: 1.55rem; font-weight: 500; letter-spacing: -.02em; }
.logo span { color: var(--accent); }
.menu { display: flex; align-items: center; gap: 1.9rem; font-size: .93rem; }
.menu a:not(.btn) { color: var(--muted); transition: color .15s; }
.menu a:not(.btn):hover { color: var(--ink); }
.nav-toggle { display: none; background: none; border: 0; padding: 10px 6px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 6px 0; background: var(--ink); }

/* Accueil */
.hero { padding: 72px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 72px; align-items: end; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 33em; margin-top: 1.6em; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; margin-top: 2em; }

.ledger { background: var(--white); border: 1px solid var(--rule); padding: 26px 26px 22px; }
.ledger-title { font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.2em; }
.ledger-title span { display: block; margin-top: .3em; font-weight: 400; letter-spacing: 0; text-transform: none; color: var(--muted); font-size: .85rem; }
.ledger table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.ledger th { text-align: right; font-weight: 500; font-size: .75rem; color: var(--muted); padding: 0 0 8px; }
.ledger th:first-child, .ledger td:first-child { text-align: left; }
.ledger td { padding: 10px 0; border-top: 1px solid var(--rule); text-align: right; font-variant-numeric: tabular-nums; }
.ledger tfoot td { font-weight: 600; border-top: 2px solid var(--ink); }
.ledger-total { margin: 18px 0 0; font-size: .95rem; color: var(--muted); }
.ledger-total strong { display: block; font-family: var(--serif); font-weight: 400; font-size: 3.4rem; line-height: 1; color: var(--green); }

/* Chiffres */
.stats { border-block: 1px solid var(--rule); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats-grid > div { padding: 40px 28px 36px 0; }
.stats-grid > div + div { padding-left: 28px; border-left: 1px solid var(--rule); }
.stats-grid strong { display: block; white-space: nowrap; font-family: var(--serif); font-weight: 400; font-size: 3.2rem; line-height: 1; letter-spacing: -.02em; margin-bottom: 10px; }
.stats-grid span { display: block; color: var(--muted); font-size: .9rem; line-height: 1.45; }
.stats-note { margin: 0; padding: 0 0 22px; color: var(--muted); font-size: .8rem; }

/* Sections */
.section { padding: 110px 0; }
.section.tint { background: var(--paper-2); }
.section-head p:not(.kicker) { color: var(--muted); }
.section-head.wide { max-width: 760px; margin-bottom: 56px; }
.split { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.split .section-head { position: sticky; top: 110px; }

/* Illustrations */
.illu { display: block; width: 100%; max-width: 360px; height: auto; margin-top: 36px; }
.diagram-wrap { overflow-x: auto; margin-bottom: 56px; }
.diagram { display: block; width: 100%; min-width: 720px; height: auto; }

/* Services */
.svc { display: grid; grid-template-columns: 56px 1fr; gap: 12px; padding: 30px 0; border-top: 1px solid var(--ink); }
.svc:last-child { border-bottom: 1px solid var(--ink); }
.num { font-family: var(--serif); font-size: 1.1rem; color: var(--accent); padding-top: .2em; }
.svc h3 { margin-bottom: .35em; }
.svc p { color: var(--muted); margin-bottom: .8em; }
.gain { color: var(--ink) !important; font-size: .93rem; margin: 0 !important; }
.gain b { display: inline-block; margin-right: .6em; font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--green); }

/* Simulateur */
.calc { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--ink); }
.calc-inputs { display: grid; gap: 22px; align-content: start; padding: 36px; background: var(--white); }
label { display: grid; gap: 6px; font-size: .88rem; font-weight: 500; }
label output { color: var(--accent); font-weight: 600; }
input, select, textarea {
  font: inherit; font-size: 1.05rem; color: var(--ink); background: transparent; width: 100%;
  border: 0; border-bottom: 1px solid var(--ink); border-radius: 0; padding: .5em 0;
}
input:focus, select:focus, textarea:focus { outline: 0; border-bottom-color: var(--accent); box-shadow: 0 1px 0 var(--accent); }
input[type="range"] { padding: 0; accent-color: var(--accent); border: 0; box-shadow: none; }
.calc-results { display: grid; gap: 4px; align-content: start; padding: 36px; background: var(--green); color: var(--paper); }
.res { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 14px 0; border-bottom: 1px solid rgba(243,247,242,.25); }
.res span { color: rgba(243,247,242,.75); font-size: .93rem; }
.res strong { font-family: var(--serif); font-weight: 400; font-size: 2.2rem; line-height: 1; white-space: nowrap; }
.calc-note { color: rgba(243,247,242,.7); font-size: .8rem; margin: 14px 0 18px; }
.perf { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 56px; }
.perf h3 { padding-top: 14px; border-top: 2px solid var(--accent); }
.perf p { color: var(--muted); margin: 0; }

/* Méthode */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: s; border-top: 1px solid var(--ink); }
.steps li { padding-top: 24px; }
.steps li span { display: block; font-family: var(--serif); font-size: 3.6rem; line-height: 1; color: var(--accent); margin-bottom: 16px; }
.steps p { color: var(--muted); margin: 0; font-size: .96rem; }

/* Cas d'usage */
.tabs { display: flex; flex-wrap: wrap; gap: 6px 32px; border-bottom: 1px solid var(--rule); margin-bottom: 36px; }
.tabs button {
  padding: 0 0 14px; background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px;
  font: 500 1rem var(--sans); color: var(--muted); cursor: pointer;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.panel { display: none; grid-template-columns: 1fr 1fr; gap: 64px; }
.panel.active { display: grid; animation: fade .35s; }
.panel h3 { font-size: 1.8rem; }
.panel p { color: var(--muted); }
.panel ul { margin: 0; padding: 0; list-style: none; }
.panel li { padding: 10px 0; border-top: 1px solid var(--rule); }
.panel li:last-child { border-bottom: 1px solid var(--rule); }
.kpis { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.kpis span { border: 1px solid var(--green); color: var(--green); padding: .25em .8em; font-size: .82rem; font-weight: 500; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* Tarifs */
.pricing { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--ink); }
.plan { position: relative; display: flex; flex-direction: column; padding: 38px 34px; }
.plan + .plan { border-left: 1px solid var(--ink); }
.plan.featured { background: var(--green); color: var(--paper); }
.badge {
  position: absolute; top: 0; right: 0; background: var(--mint); color: var(--green-2);
  font-size: .72rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; padding: .45em .9em;
}
.price { font-family: var(--serif); font-size: 2.9rem; line-height: 1.1; margin-bottom: 1.2rem; }
.price-note { margin: 28px 0 0; color: var(--muted); font-size: .85rem; max-width: 62em; }
.price small {font-family: var(--sans); font-size: .9rem; opacity: .65; }
.plan ul { list-style: none; padding: 0; margin: 0 0 32px; flex: 1; }
.plan li { padding: 10px 0; border-top: 1px solid var(--rule); font-size: .96rem; }
.plan.featured li { border-top-color: rgba(243,247,242,.28); }

/* FAQ */
.faq details { border-top: 1px solid var(--ink); }
.faq details:last-child { border-bottom: 1px solid var(--ink); }
summary {
  cursor: pointer; padding: 22px 0; font-family: var(--serif); font-size: 1.3rem; list-style: none;
  display: flex; justify-content: space-between; gap: 20px;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--sans); font-size: 1.5rem; line-height: 1; color: var(--accent); transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--muted); padding: 0 40px 22px 0; margin: 0; }

/* Contact */
.contact { background: var(--green-2); color: var(--paper); }
.contact .kicker { color: var(--mint); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.contact p { color: rgba(243,247,242,.8); }
.contact-list { list-style: none; padding: 0; margin: 2em 0 0; font-family: var(--serif); font-size: 1.3rem; }
.contact-list li { padding: 10px 0; border-top: 1px solid rgba(243,247,242,.25); }
.contact form { display: grid; gap: 22px; padding: 40px; background: var(--white); color: var(--ink); border-top: 6px solid var(--mint); }
.form-title { font-family: var(--serif); font-size: 1.6rem; line-height: 1.2; margin: 0 0 -6px; }
.contact form .form-title { color: var(--ink); }
.contact label { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 4px; font-size: .95rem; font-weight: 600; color: var(--ink); }
.contact label small { flex-basis: 100%; font-weight: 400; color: var(--muted); font-size: .85rem; line-height: 1.4; }
.contact label input, .contact label select, .contact label textarea { flex-basis: 100%; }
.req { color: var(--accent); }
.contact input, .contact select, .contact textarea {
  color: var(--ink); background: #fff; font-weight: 400; font-size: 1rem;
  border: 1.5px solid #9db3a4; border-radius: 3px; padding: .8em 1em;
}
.contact input::placeholder, .contact textarea::placeholder { color: #86978c; }
.contact textarea { min-height: 150px; resize: vertical; line-height: 1.5; }
.contact select { appearance: auto; cursor: pointer; }
.contact input:hover, .contact select:hover, .contact textarea:hover { border-color: var(--green); }
.contact input:focus, .contact select:focus, .contact textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(11,138,90,.2); }
.contact input.invalid, .contact textarea.invalid { border-color: #b3261e; background: #fff6f4; }
.contact form .btn { width: 100%; padding: 1.05em 1.6em; background: var(--green); border-color: var(--green); color: #fff; font-size: 1rem; }
.contact form .btn:hover { background: var(--green-2); border-color: var(--green-2); }
.form-hint { margin: -6px 0 0; font-size: .82rem; color: var(--muted) !important; }
#form-status { margin: 0; font-size: .92rem; min-height: 1.4em; }
#form-status.ok { color: var(--accent); font-weight: 600; }
#form-status.err { color: #b3261e; font-weight: 600; }

/* Pages légales */
.legal { padding: 72px 0 96px; }
.narrow-legal { width: min(760px, 100% - 48px); margin-inline: auto; }
.legal h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); margin-bottom: .6em; }
.legal h2 { font-size: 1.5rem; margin: 2.2em 0 .5em; padding-top: 1.2em; border-top: 1px solid var(--rule); }
.legal p, .legal li { color: var(--ink); }
.legal ul { padding-left: 1.2em; }
.legal li { margin-bottom: .4em; }
.legal a:not(.link-arrow) { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.legal mark { background: #fff1b8; color: var(--ink); padding: 0 .25em; }
.legal-note { background: var(--paper-2); border-left: 4px solid var(--accent); padding: 14px 18px; font-size: .95rem; margin-bottom: 2em; }
.legal-date { margin-top: 3em; color: var(--muted) !important; font-size: .9rem; }
.back { font-size: .95rem; }
.back::after { content: none; }
.back::before { content: "← "; }

/* Page 404 */
.notfound { padding: 110px 0 130px; }
.notfound h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
.notfound p { color: var(--muted); max-width: 34em; }
.notfound-links { display: flex; flex-wrap: wrap; align-items: center; gap: 20px 28px; margin-top: 2em; }

/* Pied de page */
.site-footer { padding: 26px 0; color: var(--muted); font-size: .88rem; border-top: 1px solid var(--rule); }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer-row a:hover { color: var(--ink); }

/* Effets au défilement */
.scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 100; height: 3px; width: 100%;
  background: var(--accent); transform: scaleX(0); transform-origin: left; will-change: transform;
}
.js .reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--d, 0s);
}
.js .reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid, .split, .contact-grid, .calc { grid-template-columns: 1fr; gap: 48px; }
  .calc { gap: 0; }
  .split .section-head { position: static; }
  .stats-grid, .steps { grid-template-columns: 1fr 1fr; }
  .stats-grid > div:nth-child(3) { padding-left: 0; border-left: 0; }
  .stats-grid > div:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .panel.active { grid-template-columns: 1fr; gap: 24px; }
  .pricing { grid-template-columns: 1fr; }
  .plan + .plan { border-left: 0; border-top: 1px solid var(--ink); }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav-toggle { display: block; }
  .menu {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 0; padding: 8px 24px 24px; background: var(--paper); border-bottom: 1px solid var(--rule); display: none;
  }
  .menu.open { display: flex; }
  .menu a { padding: 12px 0; }
  .menu .btn { text-align: center; margin-top: 10px; }
  .section { padding: 72px 0; }
  .hero { padding: 40px 0 56px; }
  .perf { grid-template-columns: 1fr; gap: 28px; }
  .steps { grid-template-columns: 1fr; }
  .calc-inputs, .calc-results { padding: 26px 22px; }
  .svc { grid-template-columns: 40px 1fr; }
  .stats-grid strong { font-size: 2.3rem; }
  .stats-grid > div { padding-right: 16px; }
  .stats-grid > div + div { padding-left: 16px; }
  .stats-grid > div:nth-child(3) { padding-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; }
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}