/* ==========================================================================
   FileBridge — site vitrine
   Palette : bleu/orange du logo produit, ton tech/corporate sobre.
   ========================================================================== */

:root {
  --color-primary: #1d6fb8;
  --color-primary-dark: #14507f;
  --color-primary-light: #eaf2fa;
  --color-accent: #ef7d1f;
  --color-accent-dark: #cc6811;
  --color-ink: #16232f;
  --color-ink-soft: #4a5a68;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f8fb;
  --color-border: #e2e8f0;
  --color-white: #ffffff;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(22, 35, 47, 0.06), 0 1px 3px rgba(22, 35, 47, 0.08);
  --shadow-md: 0 8px 24px rgba(22, 35, 47, 0.10);

  --container-width: 1120px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #4a9be0;
    --color-primary-dark: #1d6fb8;
    --color-primary-light: #17293a;
    --color-accent: #ff9a4d;
    --color-accent-dark: #ef7d1f;
    --color-ink: #eef2f6;
    --color-ink-soft: #aab6c2;
    --color-bg: #0f1720;
    --color-bg-alt: #141f2b;
    --color-border: #263543;
    --color-white: #182430;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  }
}

/* Reset minimal ------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
code {
  background: var(--color-primary-light);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.9em;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 8px; top: -48px;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: top 0.15s ease;
  z-index: 100;
}
.skip-link:focus { top: 8px; }

/* Boutons --------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-dark); }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); }

.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-sm { padding: 8px 16px; font-size: 0.9rem; }

/* Header ------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-ink);
}
.brand-logo {
  height: 60px;
  width: auto;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.primary-nav a:not(.btn) {
  text-decoration: none;
  color: var(--color-ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
}
.primary-nav a:not(.btn):hover { color: var(--color-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle i { font-size: 18px; color: var(--color-ink); }

/* Hero ---------------------------------------------------------------- */

.hero {
  padding: 88px 0 72px;
  background:
    radial-gradient(680px 340px at 85% -10%, color-mix(in srgb, var(--color-accent) 16%, transparent), transparent),
    radial-gradient(680px 340px at 5% 0%, color-mix(in srgb, var(--color-primary) 14%, transparent), transparent);
}
.hero-inner { text-align: center; max-width: 780px; }

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}
.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 32px 0 18px;
}

.hero-note {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  margin: 0;
}

/* Sections ------------------------------------------------------------ */

.section { padding: 88px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  text-align: center;
  letter-spacing: -0.01em;
}
.section-lead {
  text-align: center;
  color: var(--color-ink-soft);
  max-width: 560px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

/* Features grid --------------------------------------------------------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-card-highlight {
  background: var(--color-primary-light);
  border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 16px;
}
.feature-icon i { font-size: 20px; }

.feature-card h3 { font-size: 1.05rem; }
.feature-card p { color: var(--color-ink-soft); font-size: 0.95rem; margin: 0; }

/* Steps ------------------------------------------------------------- */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  counter-reset: step;
}
.step { text-align: center; }
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: 16px;
}
.step h3 { font-size: 1.05rem; }
.step p { color: var(--color-ink-soft); font-size: 0.95rem; }

/* Sécurité / RGPD ------------------------------------------------------- */

.check-list { list-style: none; display: grid; gap: 12px; margin-top: 24px; }
.check-list-centered {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-ink-soft);
}
.check-list li i {
  color: var(--color-primary);
  font-size: 18px;
  margin-top: 3px;
  flex-shrink: 0;
}

/* FAQ / Accordion ------------------------------------------------------- */

.accordion {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  overflow: hidden;
}
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
}
.accordion-icon {
  flex-shrink: 0;
  color: var(--color-primary);
  font-size: 14px;
  transition: transform 0.2s ease;
}
.accordion-trigger[aria-expanded="true"] .accordion-icon { transform: rotate(180deg); }

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.22s ease;
}
.accordion-panel > p {
  overflow: hidden;
  margin: 0;
  padding: 0 22px;
  color: var(--color-ink-soft);
}
.accordion-item.is-open .accordion-panel { grid-template-rows: 1fr; }
.accordion-item.is-open .accordion-panel > p { padding: 0 22px 20px; }

/* CTA final ------------------------------------------------------------ */

.cta-section {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
}
.cta-inner { text-align: center; max-width: 620px; }
.cta-section h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.cta-section p { color: rgba(255,255,255,0.85); }
.cta-meta { font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-top: 18px; }

/* Footer ------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
  background: var(--color-bg-alt);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.footer-brand:hover strong { color: var(--color-primary); }
.footer-brand img { border-radius: 10px; }
.footer-brand strong { display: block; font-size: 0.95rem; }
.footer-brand p { margin: 0; font-size: 0.85rem; color: var(--color-ink-soft); }

.footer-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-nav a { text-decoration: none; font-size: 0.9rem; color: var(--color-ink-soft); }
.footer-nav a:hover { color: var(--color-primary); }

.footer-copy {
  width: 100%;
  margin: 24px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  text-align: center;
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 16px;
    display: none;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav .btn { align-self: flex-start; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }
}