/* Aero24/7 — présentation proposée. Aucune dépendance externe : polices système, pas de framework. */

:root {
  --navy: #0b2545;
  --navy-2: #13315c;
  --ink: #1b2a41;
  --muted: #55657d;
  --line: #e3e8ef;
  --soft: #f4f7fb;
  --white: #fff;
  --gold: #c8963e;
  --gold-ink: #8a5d12;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 37, 69, .08);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; font-family: var(--sans); font-size: 17px; line-height: 1.65; color: var(--ink); background: var(--white); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy-2); }
a:hover { color: var(--gold-ink); }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1120px, 100% - 48px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

h1, h2, h3 { font-family: var(--serif); color: var(--navy); line-height: 1.15; margin: 0 0 .5em; font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: clamp(2.4rem, 5.4vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
.eyebrow { display: inline-block; font: 600 .78rem/1 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--gold-ink); margin-bottom: 18px; }
.eyebrow::before { content: ""; display: inline-block; width: 28px; height: 2px; background: var(--gold); vertical-align: middle; margin-right: 12px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }

/* Boutons */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px; border-radius: 999px; font: 600 .95rem/1 var(--sans); text-decoration: none; border: 2px solid transparent; cursor: pointer; transition: transform .2s, background .2s, color .2s, border-color .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-2); color: #fff; }
.btn-ghost { border-color: var(--navy); color: var(--navy); background: transparent; }
.btn-ghost:hover { background: var(--navy); color: #fff; }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: #d8a64e; color: var(--navy); }

/* En-tête */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px); border-bottom: 1px solid transparent; transition: border-color .2s, box-shadow .2s; }
.site-header.scrolled { border-color: var(--line); box-shadow: 0 4px 20px rgba(11, 37, 69, .06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy); }
/* Le logo est blanc sur fond noir : on l'inverse puis on éclaircit le fond pour le fondre dans l'en-tête blanc. */
.brand img { width: 46px; height: 46px; object-fit: contain; filter: invert(1) brightness(1.25); mix-blend-mode: multiply; }
.brand span { font: 700 1.15rem/1 var(--serif); letter-spacing: .02em; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 10px; width: 44px; height: 44px; cursor: pointer; color: var(--navy); }
.nav-toggle svg { width: 22px; height: 22px; }
.site-nav ul { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.site-nav a { display: block; padding: 10px 14px; font-size: .92rem; font-weight: 500; color: var(--ink); text-decoration: none; border-radius: 8px; }
.site-nav a:hover { color: var(--gold-ink); background: var(--soft); }
.site-nav .btn { padding: 11px 22px; color: #fff; margin-left: 8px; }
.site-nav .btn:hover { color: #fff; background: var(--navy-2); }

/* Hero */
.hero { position: relative; min-height: min(86vh, 760px); display: flex; align-items: center; background: #e9f0f7 url("../img/hero-bg.png") center bottom / cover no-repeat; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255, 255, 255, .94) 0%, rgba(255, 255, 255, .78) 42%, rgba(255, 255, 255, 0) 75%); }
.hero .container { position: relative; padding-block: 72px 120px; }
.hero h1 { max-width: 14ch; }
.hero .lead { margin-bottom: 36px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* Bandeau de références */
.trust { position: relative; margin-top: -64px; z-index: 2; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.trust-item { padding: 26px 24px; border-right: 1px solid var(--line); }
.trust-item:last-child { border-right: 0; }
.trust-item strong { display: block; font: 600 1.02rem/1.3 var(--serif); color: var(--navy); margin-bottom: 4px; }
.trust-item span { font-size: .88rem; color: var(--muted); line-height: 1.45; display: block; }

/* Sections */
section { padding: 104px 0; }
section.hero { padding: 0; }
.section-soft { background: var(--soft); }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.section-head { max-width: 760px; margin-bottom: 52px; }
.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; align-items: center; }
.partner-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.partner-card img { border-radius: 8px; margin-bottom: 20px; }
.partner-card p { font-size: .95rem; color: var(--muted); margin: 0; }

/* Cartes de services */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px 32px; transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.icon { width: 52px; height: 52px; border-radius: 14px; background: var(--navy); color: var(--gold); display: grid; place-items: center; margin-bottom: 22px; }
.icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card p { color: var(--muted); font-size: .98rem; }
.card a.more { font-weight: 600; font-size: .92rem; text-decoration: none; }
.card a.more::after { content: " →"; }

/* Listes */
.checks { list-style: none; margin: 0 0 1.2em; padding: 0; }
.checks li { position: relative; padding: 7px 0 7px 32px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 14px; width: 18px; height: 18px; border-radius: 50%; background: var(--gold) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3.2 3.2L15 7' fill='none' stroke='%230b2545' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat; }

/* MRO */
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.panel h3 { font-size: 1.15rem; }
.panel .checks { margin-bottom: 0; }
.cert { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; padding: 0; list-style: none; }
.cert li { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 8px 18px; font-size: .88rem; font-weight: 600; color: var(--navy); }

.makers { display: flex; flex-wrap: wrap; gap: 14px 40px; align-items: center; margin-top: 56px; padding-top: 36px; border-top: 1px solid var(--line); }
.makers span.label { font: 600 .78rem/1 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.makers b { font: 600 1.25rem/1 var(--serif); color: var(--navy-2); letter-spacing: .06em; text-transform: uppercase; opacity: .75; }

/* Pooling */
.quote-block { max-width: 820px; margin: 0 auto 56px; text-align: center; }
.quote-block blockquote { margin: 0; font: italic 500 clamp(1.4rem, 2.8vw, 2rem)/1.4 var(--serif); color: var(--navy); }
.quote-block blockquote::before { content: "“"; display: block; font-size: 4rem; line-height: .6; color: var(--gold); margin-bottom: 8px; }
.narrow { max-width: 760px; margin-inline: auto; }
.narrow-left { max-width: 760px; }

/* Étapes / conseil */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; margin-top: 40px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.step::before { counter-increment: step; content: "0" counter(step); display: block; font: 600 2rem/1 var(--serif); color: var(--gold); margin-bottom: 14px; }
.step strong { font: 600 1.1rem/1.3 var(--serif); color: var(--navy); }
.advisory { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.advisory .num { font: 600 .85rem/1 var(--sans); letter-spacing: .16em; color: var(--gold-ink); margin-bottom: 18px; display: block; }

/* Bandeau citation */
.band { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; text-align: center; padding: 96px 0; }
.band h2 { color: #fff; max-width: 28ch; margin: 0 auto 28px; font-size: clamp(1.8rem, 4vw, 3rem); }
.band h2 em { color: var(--gold); font-style: normal; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.contact-info address { font-style: normal; color: var(--muted); line-height: 1.8; margin-top: 28px; padding-left: 20px; border-left: 3px solid var(--gold); }
.contact-info address strong { color: var(--navy); }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
.field { margin-bottom: 20px; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
label { display: block; font-size: .85rem; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
label small { font-weight: 400; color: var(--muted); }
input[type=text], input[type=email], textarea { width: 100%; padding: 14px 16px; font: inherit; color: var(--ink); background: #fff; border: 1px solid #c9d3e0; border-radius: 10px; transition: border-color .2s, box-shadow .2s; }
input:focus, textarea:focus { outline: none; border-color: var(--navy-2); box-shadow: 0 0 0 4px rgba(19, 49, 92, .12); }
textarea { min-height: 150px; resize: vertical; }
/* Piège à robots : hors écran, retiré de la navigation clavier (tabindex=-1). */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-card .btn { width: 100%; justify-content: center; }

/* Pied de page */
.site-footer { background: #08172c; color: #b8c4d6; padding: 64px 0 36px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; padding-bottom: 36px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.site-footer h3 { color: #fff; font-size: 1.2rem; }
.site-footer a { color: #d9e2ef; text-decoration: none; }
.site-footer a:hover { color: var(--gold); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.legal { padding-top: 28px; font-size: .82rem; color: #8b9ab0; }
.legal p { margin: 0 0 6px; }

/* Apparition au défilement (activée uniquement si le JS tourne) */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
}

/* Adaptatif */
@media (max-width: 960px) {
  section { padding: 80px 0; }
  .nav-toggle { display: inline-grid; place-items: center; }
  .site-nav { position: absolute; left: 0; right: 0; top: 100%; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 16px 30px rgba(11, 37, 69, .1); display: none; padding: 12px 24px 20px; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav .btn { margin: 10px 0 0; text-align: center; justify-content: center; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-item:nth-child(2) { border-right: 0; }
  .trust-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .split, .contact-grid, .footer-grid, .panel-grid { grid-template-columns: 1fr; gap: 40px; }
  .cards, .steps, .advisory { grid-template-columns: 1fr; }
  .hero::before { background: linear-gradient(180deg, rgba(255, 255, 255, .92) 0%, rgba(255, 255, 255, .7) 60%, rgba(255, 255, 255, .15) 100%); }
  .hero .container { padding-block: 56px 110px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .container { width: calc(100% - 32px); }
  .row-2 { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: 28px 22px; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .trust-item:last-child { border-bottom: 0; }
}