body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #f4f4f4;

  min-height: 100vh;      /* important : hauteur mini = viewport */
  display: flex;
  flex-direction: column; /* header (facultatif), main, footer */
}

/* CENTRER LE CONTENU DANS MAIN (pas le body) */
main {
  flex: 1;                        /* prend l'espace restant */
  display: flex;
  justify-content: center;        /* centre horizontal */
  align-items: center;            /* centre vertical */
}

footer {
  background-color: #ffffff;
  color: black;
  text-align: center;
  width: 100%;
}
.login-container {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-form {
    display: flex;
    flex-direction: column;
}

.login-form h2 {
    margin-bottom: 20px;
    text-align: center;
}

.login-form input {
    margin-bottom: 15px;
    padding: 12px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

.login-form button {
    padding: 12px;
    background-color: #70C48F;
    border: none;
    color: white;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-form button:hover {
    background-color: #5aaa7c;
}

.error {
    background-color: #ffdddd;
    color: #a94442;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: center;
}