/* Exercice 5 - Responsive Design Mobile First */

body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f9f9f9;
}

h1 { color: #2c3e50; padding: 0 20px; }
h2 { color: #3498db; border-bottom: 2px solid #3498db; padding-bottom: 5px; margin: 0 20px 15px; }

/* Base mobile */
.container {
  width: 100%;
  padding: 15px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 5px;
  list-style: none;
  padding: 0;
  margin: 0;
  background: #2c3e50;
  border-radius: 8px;
  overflow: hidden;
}
.nav-menu li a {
  display: block;
  color: white;
  text-decoration: none;
  padding: 12px 20px;
}
.nav-menu li a:hover { background: #3498db; }

.content {
  display: block;
  margin-top: 15px;
}

.sidebar {
  display: none;
  background: #8e44ad;
  color: white;
  padding: 15px;
  border-radius: 8px;
}

.main-content {
  background: white;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.label {
  background: #e74c3c;
  color: white;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: 8px;
}

/* Tablette */
@media (min-width: 600px) {
  .nav-menu { flex-direction: row; }
  .nav-menu li a { padding: 12px 15px; }
}

/* Desktop */
@media (min-width: 900px) {
  .content { display: flex; gap: 20px; }
  .sidebar { display: block; width: 220px; flex-shrink: 0; }
  .main-content { flex: 1; }
}