/* Variables globales pour un thème "Santé/Institution" */
:root {
  --primary-color: #005b9f;
  --secondary-color: #f4f7f6;
  --text-color: #333333;
  --link-color: #004080;
  --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* Reset et Accessibilité */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-main); color: var(--text-color); line-height: 1.6; background-color: var(--secondary-color); }
a { color: var(--link-color); text-decoration: none; transition: color 0.3s; }
a:hover, a:focus { color: var(--primary-color); text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }

/* Structure principale */
header { background-color: #ffffff; border-bottom: 4px solid var(--primary-color); padding: 1.5rem 5%; text-align: center; }
header h1 { color: var(--primary-color); font-size: 2rem; margin-bottom: 0.5rem; }
header p { font-size: 1rem; color: #666; font-style: italic; }

nav { background-color: var(--primary-color); padding: 1rem 5%; }
nav ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
nav a { color: #ffffff; font-weight: bold; font-size: 1.1rem; }
nav a:hover, nav a:focus { color: #d0e1f9; text-decoration: none; }

main { max-width: 900px; margin: 2rem auto; padding: 2rem; background: #ffffff; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
main h2 { color: var(--primary-color); margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #eee; }
main h3 { color: #444; margin: 1.5rem 0 1rem 0; }
main p, main ul { margin-bottom: 1.5rem; }
main ul { padding-left: 2rem; }
main li { margin-bottom: 0.5rem; }

footer { background-color: #2c3e50; color: #ffffff; text-align: center; padding: 2rem 5%; margin-top: 2rem; }
footer a { color: #d0e1f9; }

/* Responsive Mobile */
@media (max-width: 768px) {
  nav ul { flex-direction: column; gap: 1rem; text-align: center; }
  main { margin: 1rem; padding: 1.5rem; }
}