/* =========================================================
   Nerva Consulting — feuille de styles principale
   ========================================================= */

:root {
  --ink:        #0A1C2B;
  --ink-2:      #0E2739;
  --ink-3:      #14344A;
  --paper:      #FFFFFF;
  --paper-2:    #F5F8FA;
  --paper-3:    #EDF2F6;
  --text:       #16232E;
  --muted:      #5B6B7A;
  --muted-dark: #9FB3C4;
  --line:       #E1E8EE;
  --line-dark:  rgba(255,255,255,.14);
  --accent:     #0E8FA3;
  --accent-2:   #35C1D6;

  --radius:   14px;
  --radius-l: 22px;
  --shadow:   0 1px 2px rgba(10,28,43,.05), 0 12px 32px -12px rgba(10,28,43,.18);
  --shadow-l: 0 24px 60px -20px rgba(10,28,43,.35);

  --wrap: 1160px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin: 0 0 .5em;
  font-weight: 600;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.2rem; }
p  { margin: 0 0 1.1em; }

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }
.section { padding: clamp(4rem, 9vw, 7rem) 0; }
.section--tight { padding: clamp(2.5rem, 5vw, 4rem) 0; }
.section--alt  { background: var(--paper-2); }
.section--dark { background: var(--ink); color: #fff; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section--dark p { color: var(--muted-dark); }

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section--dark .eyebrow { color: var(--accent-2); }

.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.section--dark .lead { color: var(--muted-dark); }
.section-head { max-width: 68ch; margin-bottom: 3rem; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .97rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: #0b7d8f; color: #fff; }
.btn--ghost { border-color: var(--line); color: var(--text); background: #fff; }
.btn--ghost:hover { border-color: var(--ink); }
.section--dark .btn--ghost,
.hero .btn--ghost,
.cta .btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.32); }
.section--dark .btn--ghost:hover,
.hero .btn--ghost:hover,
.cta .btn--ghost:hover { border-color: #fff; color: #fff; }
.btn--lg { padding: 1rem 1.9rem; font-size: 1.02rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 76px;
}
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand__mark { width: 38px; height: 38px; flex: none; color: var(--ink); }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: .06em;
}
.brand__sub {
  font-size: .62rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: .28rem;
}

.nav { display: flex; align-items: center; gap: 2rem; }
.nav__list { display: flex; align-items: center; gap: 1.75rem; list-style: none; margin: 0; padding: 0; }
.nav__link {
  color: var(--text);
  font-size: .96rem;
  font-weight: 500;
  text-decoration: none;
  padding: .35rem 0;
  border-bottom: 2px solid transparent;
}
.nav__link:hover { text-decoration: none; color: var(--accent); }
.nav__link[aria-current="page"] { border-bottom-color: var(--accent); color: var(--ink); }

/* ---------- Sélecteur de langue ---------- */
.lang {
  display: flex;
  align-items: center;
  gap: .15rem;
  /* margin: 0 — sans cela, la marge basse des paragraphes décale le bloc
     vers le haut lors du centrage vertical de la barre de navigation. */
  margin: 0;
  margin-left: -1.1rem;   /* rapproche le sélecteur du bouton d'appel à l'action */
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .06em;
}
.lang a {
  color: var(--muted);
  text-decoration: none;
  padding: .3rem .45rem;
  border-radius: 7px;
  line-height: 1;
}
.lang a:hover { color: var(--ink); text-decoration: none; background: var(--paper-3); }
.lang a[aria-current="true"] { color: var(--ink); background: var(--paper-3); }
.lang span { color: var(--line); }

@media (max-width: 900px) {
  .lang { margin: 1.25rem 0 0; justify-content: center; }
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; position: relative;
}
.nav-toggle span::before, .nav-toggle span::after { content: ''; position: absolute; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top:  6px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.25rem 1.75rem;
    transform: translateY(-140%);
    transition: transform .28s ease;
    box-shadow: var(--shadow);
  }
  .nav[data-open="true"] { transform: translateY(0); }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link { display: block; padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .nav__link[aria-current="page"] { border-bottom-color: var(--line); color: var(--accent); }
  .nav .btn { margin-top: 1.25rem; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(160deg, #0A1C2B 0%, #10314A 60%, #0A1C2B 100%);
  color: #fff;
  overflow: hidden;
  padding: clamp(4.5rem, 10vw, 8rem) 0 clamp(4rem, 8vw, 6.5rem);
}
.hero::after {
  content: '';
  position: absolute;
  width: 620px; height: 620px;
  right: -180px; top: -220px;
  background: radial-gradient(circle, rgba(53,193,214,.22), transparent 62%);
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; display: grid; gap: 3.5rem; grid-template-columns: 1.15fr .85fr; align-items: center; }
@media (max-width: 940px) { .hero__inner { grid-template-columns: 1fr; gap: 2.5rem; } }
.hero h1 { color: #fff; }
.hero h1 em { font-style: normal; color: var(--accent-2); }
.hero__lead { font-size: 1.18rem; color: #C6D7E4; max-width: 54ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 2rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line-dark); }
.hero__meta div strong { display: block; font-family: var(--font-display); font-size: 1.5rem; color: #fff; }
.hero__meta div span { font-size: .88rem; color: var(--muted-dark); }

.hero__panel {
  background: rgba(255,255,255,.045);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-l);
  padding: 1.6rem;
  backdrop-filter: blur(6px);
}
.hero__panel-title { font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted-dark); margin-bottom: 1.1rem; }
.stack-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; }
.stack-list li {
  display: flex; align-items: center; gap: .75rem;
  font-size: .95rem; color: #DCE7EF;
  padding: .7rem .9rem;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line-dark);
  border-radius: 10px;
}
.stack-list li::before {
  content: '';
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-2); flex: none;
}

/* ---------- Grilles / cartes ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 940px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #CBD8E2; }
.card h3 { margin-bottom: .5rem; }
.card p { color: var(--muted); margin-bottom: 0; font-size: .97rem; }
.card__icon {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(14,143,163,.1);
  color: var(--accent);
  margin-bottom: 1.1rem;
}
.card__icon svg { width: 22px; height: 22px; }
.card__list { list-style: none; margin: 1rem 0 0; padding: 0; font-size: .93rem; color: var(--muted); }
.card__list li { padding-left: 1.15rem; position: relative; margin-bottom: .35rem; }
.card__list li::before { content: '→'; position: absolute; left: 0; color: var(--accent); }

.section--dark .card {
  background: rgba(255,255,255,.04);
  border-color: var(--line-dark);
}
.section--dark .card:hover { border-color: rgba(255,255,255,.28); box-shadow: none; }
.section--dark .card p { color: var(--muted-dark); }

/* ---------- Étapes ---------- */
.steps { counter-reset: step; display: grid; gap: 1.5rem; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 940px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-top: 2.6rem; }
.step::before {
  counter-increment: step;
  content: '0' counter(step);
  position: absolute; top: 0; left: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .04em;
}
.step::after {
  content: '';
  position: absolute; top: 1.55rem; left: 0; right: 1.5rem;
  height: 1px; background: var(--line);
}
.section--dark .step::after { background: var(--line-dark); }
.section--dark .step::before { color: var(--accent-2); }
.step h3 { margin-bottom: .4rem; }
.step p { font-size: .95rem; color: var(--muted); margin: 0; }

/* ---------- Bandeau CTA ---------- */
.cta {
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-3) 100%);
  color: #fff;
  border-radius: var(--radius-l);
  padding: clamp(2.5rem, 5vw, 4rem);
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-l);
}
.cta h2 { color: #fff; margin-bottom: .4rem; }
.cta p { color: var(--muted-dark); margin: 0; max-width: 46ch; }

/* ---------- Page interne ---------- */
.page-hero {
  background: var(--ink);
  color: #fff;
  padding: clamp(3.5rem, 7vw, 5.5rem) 0 clamp(3rem, 6vw, 4.5rem);
}
.page-hero h1 { color: #fff; margin-bottom: .6rem; }
.page-hero p { color: var(--muted-dark); max-width: 60ch; font-size: 1.1rem; margin: 0; }
.breadcrumb { font-size: .84rem; color: var(--muted-dark); margin-bottom: 1.2rem; }
.breadcrumb a { color: var(--muted-dark); }
.breadcrumb a:hover { color: #fff; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 3rem; align-items: start; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; } }

.form { display: grid; gap: 1.25rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 620px) { .form__row { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field label { font-size: .9rem; font-weight: 600; color: var(--ink); }
.field .req { color: var(--accent); }
.field input, .field select, .field textarea {
  font: inherit;
  font-size: .97rem;
  color: var(--text);
  padding: .8rem .95rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  transition: border-color .16s ease, box-shadow .16s ease;
  width: 100%;
}
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,143,163,.15);
}
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"], .field select[aria-invalid="true"] {
  border-color: #C0392B;
  box-shadow: 0 0 0 3px rgba(192,57,43,.12);
}
.field__error { font-size: .84rem; color: #C0392B; min-height: 1.1em; }
.field__hint { font-size: .84rem; color: var(--muted); }

.checkbox { display: flex; flex-direction: row; flex-wrap: wrap; gap: .7rem; align-items: flex-start; font-size: .9rem; color: var(--muted); }
.checkbox label { font-weight: 400; line-height: 1.5; flex: 1; min-width: 12rem; }
.checkbox .field__error { width: 100%; }
.checkbox input { width: 18px; height: 18px; margin-top: .2rem; flex: none; accent-color: var(--accent); }

.form__status { border-radius: 10px; padding: .9rem 1.1rem; font-size: .95rem; display: none; }
.form__status[data-state="ok"]   { display: block; background: rgba(14,143,163,.1);  color: #0b6d7c; border: 1px solid rgba(14,143,163,.3); }
.form__status[data-state="error"]{ display: block; background: rgba(192,57,43,.08); color: #A5342A; border: 1px solid rgba(192,57,43,.25); }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; }

.info-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
}
.info-card + .info-card { margin-top: 1.5rem; }
.info-card h3 { font-size: 1.05rem; margin-bottom: 1rem; }
.info-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; font-size: .95rem; }
.info-list dt, .info-list strong { display: block; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: .15rem; }
.info-list li span { color: var(--text); }

/* ---------- Contenu légal ---------- */
.prose { max-width: 76ch; }
.prose h2 { font-size: 1.45rem; margin-top: 2.8rem; }
.prose h3 { font-size: 1.08rem; margin-top: 1.8rem; }
.prose p, .prose li { color: var(--muted); }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: .4rem; }
.prose strong { color: var(--text); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: .95rem; }
.prose th, .prose td { text-align: left; padding: .75rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { width: 38%; color: var(--ink); font-weight: 600; }
.prose td { color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--muted-dark); padding: 4rem 0 2rem; font-size: .93rem; }
.site-footer a { color: var(--muted-dark); }
.site-footer a:hover { color: #fff; text-decoration: none; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 2.5rem; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer .brand { color: #fff; }
.site-footer .brand__mark { color: #fff; }
.site-footer .brand__sub { color: var(--muted-dark); }
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: .76rem; letter-spacing: .16em; text-transform: uppercase;
  color: #fff; margin: 0 0 1rem;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.footer-about p { margin: 1.2rem 0 0; max-width: 34ch; }
.footer-legal {
  margin-top: 3rem; padding-top: 1.5rem;
  border-top: 1px solid var(--line-dark);
  display: flex; flex-wrap: wrap; gap: .6rem 1.5rem;
  justify-content: space-between;
  font-size: .85rem;
}
.footer-legal ul { display: flex; flex-wrap: wrap; gap: 1.25rem; list-style: none; margin: 0; padding: 0; }

/* ---------- Divers ---------- */
/* Décalage pour l'en-tête collant lors des ancres et du focus de validation */
[id] { scroll-margin-top: 96px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: #fff; color: var(--ink); padding: .75rem 1.25rem; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }