/* ==========================================================================
   QAST Consulting — feuille de style principale
   ========================================================================== */

:root {
  --navy: #0b2545;
  --navy-2: #13315c;
  --blue: #1d4e89;
  --accent: #0e9f8e;
  --accent-dark: #0b7f72;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --text: #1b2433;
  --muted: #5b6678;
  --border: #e2e8f0;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(11, 37, 69, 0.08);
  --container: 1140px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

img, svg { max-width: 100%; display: block; }

a { color: var(--blue); }
a:hover { color: var(--accent-dark); }

h1, h2, h3 { color: var(--navy); line-height: 1.2; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
p { margin: 0 0 1em; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--navy); color: #fff; padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 10px; top: 10px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 6px;
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .02em;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-outline { border-color: rgba(255, 255, 255, .7); color: #fff; }
.btn-outline:hover { background: #fff; color: var(--navy); }

/* ---------- En-tête ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--navy);
}
.logo svg { width: 38px; height: 38px; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-text strong { font-size: 1.35rem; letter-spacing: .08em; }
.logo-text span { font-size: .68rem; letter-spacing: .32em; color: var(--muted); margin-top: 4px; }

.main-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 6px; align-items: center;
}
.main-nav a {
  display: block; padding: 8px 14px;
  text-decoration: none; color: var(--text);
  font-weight: 500; font-size: .95rem;
  border-radius: 6px;
}
.main-nav a:hover { color: var(--accent-dark); }
.main-nav a[aria-current="page"] { color: var(--accent-dark); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }
.main-nav .nav-cta { background: var(--navy); color: #fff; margin-left: 8px; }
.main-nav .nav-cta:hover { background: var(--blue); color: #fff; }
.main-nav .nav-cta[aria-current="page"] { box-shadow: none; border-radius: 6px; color: #fff; }

.nav-toggle {
  display: none;
  background: none; border: 0; padding: 8px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 26px; height: 2px; margin: 6px 0;
  background: var(--navy); transition: transform .25s, opacity .25s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background:
    radial-gradient(circle at 85% 20%, rgba(14, 159, 142, .35), transparent 45%),
    linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--blue) 100%);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to left, #000, transparent 70%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-home { padding: 120px 0 130px; }
.hero-page { padding: 80px 0 70px; }
.hero h1 { color: #fff; max-width: 760px; }
.hero p { font-size: 1.15rem; max-width: 640px; color: rgba(255, 255, 255, .85); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.eyebrow {
  display: inline-block;
  font-size: .8rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.hero .eyebrow { color: #5ee0cf; }

/* ---------- Sections ---------- */
.section { padding: 90px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 54px; }
.section-head p { color: var(--muted); }

.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow .25s, transform .25s, border-color .25s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: transparent; }
.card p { color: var(--muted); margin-bottom: 0; }
.card-icon {
  width: 54px; height: 54px; border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(14, 159, 142, .1); color: var(--accent-dark);
  margin-bottom: 20px;
}
.card-icon svg { width: 28px; height: 28px; }

/* Bloc service détaillé */
.service {
  display: grid; grid-template-columns: 80px 1fr; gap: 28px;
  padding: 40px 0; border-bottom: 1px solid var(--border);
}
.service:last-child { border-bottom: 0; }
.service .card-icon { width: 72px; height: 72px; }
.service .card-icon svg { width: 36px; height: 36px; }
.service ul { margin: 0; padding-left: 20px; color: var(--muted); }
.service li { margin-bottom: 4px; }

/* Chiffres / atouts */
.values { text-align: center; }
.values h3 { margin-top: 6px; }
.values p { color: var(--muted); }
.value-num { font-size: 2.4rem; font-weight: 700; color: var(--accent); line-height: 1; }

/* ---------- Clients ---------- */
.clients-row {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px;
}
.client {
  display: grid; place-items: center;
  height: 110px; padding: 16px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  text-align: center;
  font-weight: 700; font-size: 1.05rem; letter-spacing: .03em;
  color: #8a94a6;
  transition: box-shadow .25s;
}
.client img { max-height: 60px; max-width: 100%; width: auto; height: auto; object-fit: contain; }
.client:hover { box-shadow: var(--shadow); }

/* ---------- Bandeau CTA ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: #fff; text-align: center; padding: 70px 0;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255, 255, 255, .85); max-width: 620px; margin: 0 auto 26px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 50px; align-items: start; }
.contact-info { list-style: none; padding: 0; margin: 0; }
.contact-info li { display: flex; gap: 16px; margin-bottom: 26px; }
.contact-info .card-icon { flex: none; width: 46px; height: 46px; margin: 0; }
.contact-info .card-icon svg { width: 22px; height: 22px; }
.contact-info strong { display: block; color: var(--navy); }
.contact-info span, .contact-info a { color: var(--muted); }

.form { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; color: var(--navy); }
.field input,
.field textarea {
  width: 100%; padding: 12px 14px;
  font: inherit; font-size: .95rem; color: var(--text);
  border: 1px solid #cbd5e1; border-radius: 6px; background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus,
.field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(14, 159, 142, .18); }
.field-hint { display: block; margin-top: 5px; font-size: .8rem; color: var(--muted); }
.field input:user-invalid { border-color: #c0392b; }
.field-check { display: flex; gap: 10px; align-items: flex-start; font-size: .85rem; color: var(--muted); margin-bottom: 22px; }
.field-check input { margin-top: 4px; }
.hp { position: absolute; left: -9999px; }
.required { color: #c0392b; }

.alert { padding: 14px 18px; border-radius: 6px; margin-bottom: 22px; font-size: .95rem; }
.alert[hidden] { display: none; }
.alert-success { background: #e6f6f3; color: #0b5f55; border: 1px solid #a7e2d8; }
.alert-error { background: #fdecea; color: #8e2b20; border: 1px solid #f5b7ae; }

/* ---------- Pages texte (mentions légales) ---------- */
.prose { max-width: 820px; }
.prose h2 { font-size: 1.4rem; margin-top: 2em; }

/* ---------- Pied de page ---------- */
.site-footer { background: var(--navy); color: rgba(255, 255, 255, .75); padding: 60px 0 0; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.site-footer h4 { color: #fff; font-size: .85rem; letter-spacing: .15em; text-transform: uppercase; margin: 0 0 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: rgba(255, 255, 255, .75); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.site-footer .logo { color: #fff; margin-bottom: 16px; }
.site-footer .logo-text span { color: rgba(255, 255, 255, .6); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 20px 0; font-size: .85rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}

/* ---------- Animations d'apparition ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .clients-row { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute; top: 76px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    display: none;
  }
  .main-nav.is-open { display: block; }
  .main-nav ul { flex-direction: column; align-items: stretch; padding: 10px 20px 20px; gap: 0; }
  .main-nav a { padding: 14px 4px; border-bottom: 1px solid var(--border); }
  .main-nav a[aria-current="page"] { box-shadow: none; }
  .main-nav .nav-cta { margin: 14px 0 0; text-align: center; border-bottom: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .hero-home { padding: 80px 0 90px; }
  .hero-page { padding: 56px 0 50px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .clients-row { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form { padding: 24px 20px; }
  .service { grid-template-columns: 1fr; gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; }
}