body {
  font-family: Verdana, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 20px 0;
  color: #0046e2;
}

header, footer {
  background: #204cc8;
  color: #fff;
  padding: 20px 0;
  border-bottom: #77aaff 3px solid;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

nav ul {
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

nav ul li {
  display: inline;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

form {
  width: 100%;
  max-width: 600px;
  margin: 30px auto;
  padding: 30px;
  border: 1px solid #f1f1f1;
  background: #fff;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2), 0 5px 5px rgba(0, 0, 0, 0.24);
}

#container h1,
h2 {
  width: 100%;
  max-width: 600px;
  margin: 0 auto 10px;
  text-align: center;
  font-size: clamp(1.2rem, 3vw, 2rem);
}

input[type=text],
input[type=password] {
  width: 100%;
  padding: 12px 20px;
  margin: 8px 0;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

input[type=submit] {
  background-color: #0046e2;
  color: white;
  padding: 14px 20px;
  margin: 8px 0;
  border: none;
  cursor: pointer;
  width: 100%;
}

input[type=submit]:hover {
  background-color: white;
  color: #53af57;
  border: 1px solid #53af57;
}

.message,
.adresse {
  background-color: white;
  color: red;
  border: 1px solid #53af57;
  text-align: center;
  font-weight: bold;
  font-size: clamp(1.5rem, 5vw, 2rem);
  margin: 20px auto;
  max-width: 90%;
}

.submenu {
  background-color: white;
  color: red;
  border: 1px solid #53af57;
  font-weight: bold;
  font-size: 10pt;
  text-align: right;
  padding: 10px;
}

/* 📱 Media Queries pour mobile/tablette */
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    align-items: center;
  }

  .adresse {
    float: none;
    text-align: center;
  }

  form {
    padding: 20px;
  }

  .submenu {
    text-align: center;
    font-size: 12pt;
  }
}