/* ==========================================================================
   MAIN.CSS — Typographie, layout de base, structure globale
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-ink);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

p { color: var(--color-text-muted); }

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.container--narrow {
  max-width: var(--container-narrow);
}

section {
  padding-block: var(--space-2xl);
}

.section-header {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-trust-blue);
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--gradient-growth);
  border-radius: 2px;
}

.lead {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---- Skip link (accessibilité) ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-2xs) var(--space-sm);
  z-index: var(--z-modal);
}
.skip-link:focus {
  left: var(--space-sm);
  top: var(--space-sm);
}

/* ---- Focus visible ---- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-trust-blue);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-md);
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.logo span {
  color: var(--color-trust-blue);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav__list {
  display: flex;
  gap: var(--space-md);
}

.main-nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
  padding-block: var(--space-2xs);
  position: relative;
  transition: color var(--transition-fast);
}

.main-nav__link:hover,
.main-nav__link.is-active {
  color: var(--color-trust-blue);
}

.main-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--gradient-growth);
  transition: width var(--transition-fast);
}

.main-nav__link:hover::after,
.main-nav__link.is-active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2xs);
}

/* ---- Sélecteur de langue (menu déroulant, toujours visible dans la top bar) ---- */
.site-header__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-switch {
  position: relative;
}

.lang-switch__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-ink-soft);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.lang-switch__toggle:hover {
  border-color: var(--color-trust-blue);
  color: var(--color-trust-blue);
}

.lang-switch__chevron {
  color: var(--color-text-faint);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}
.lang-switch.is-open .lang-switch__chevron {
  transform: rotate(180deg);
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 130px;
  padding: 0.3rem;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: var(--z-overlay);
}
.lang-switch.is-open .lang-switch__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switch__menu a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: var(--fs-sm);
  font-weight: 500;
  text-transform: uppercase;
}
.lang-switch__menu a:hover {
  background: var(--color-bg-alt);
  color: var(--color-trust-blue);
}

.lang-switch__toggle svg,
.lang-switch__menu svg {
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(17, 24, 39, 0.08);
  flex-shrink: 0;
  display: block;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-dark);
  color: #cbd5e1;
  padding-block: var(--space-2xl) var(--space-lg);
}

.site-footer a {
  color: #cbd5e1;
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--color-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo { color: #fff; }
.footer-brand p {
  color: #94a3b8;
  margin-top: var(--space-sm);
  max-width: 30ch;
}

.footer-col h4 {
  color: #fff;
  font-size: var(--fs-sm);
  margin-bottom: var(--space-sm);
}

.footer-col li {
  margin-bottom: var(--space-2xs);
  font-size: var(--fs-sm);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  font-size: var(--fs-xs);
  color: #64748b;
}

/* ---- Utility ---- */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}