body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #eef2f7;
  margin: 0;
  padding: 0;
}

/* titre */
header {
  background: linear-gradient(90deg, #4a6cf7, #6c8cff);
  padding: 25px;
  text-align: center;
}

header h1 {
  color: white;
  margin: 0;
  font-size: 28px;
}


main {
  max-width: 700px;
  margin: 40px auto;
  padding: 0 20px;
}

/* sections */
section {
  background-color: white;
  padding: 25px;
  margin-bottom: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

h2 {
  margin-top: 0;
  color: #333;
}

/* messages */
ul {
  list-style: none;
  padding: 0;
}

li {
  background-color: #f5f7fb;
  padding: 12px 15px;
  margin-bottom: 10px;
  border-radius: 6px;
  border-left: 4px solid #4a6cf7;
}

/* Zone de texte */
textarea {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 14px;
  resize: vertical;
}

/* Bouton */
button {
  background-color: #4a6cf7;
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background-color: #3656d6;
}

input {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 14px;
  box-sizing: border-box;
}

textarea {
  box-sizing: border-box;
}

.dark-mode {
  background-color: #1e1e1e;
  color: white;
}

.dark-mode section {
  background-color: #2c2c2c;
  color: white;
}

.dark-mode h2 {
  color: white;
}

.dark-mode li {
  background-color: #3a3a3a;
  color: white;
  border-left: 4px solid #6c8cff;
}

.dark-mode input,
.dark-mode textarea {
  background-color: #444;
  color: white;
  border: 1px solid #888;
}