* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    font-family: "Segoe UI", sans-serif;
    background-color: var(--background);
    color: var(--text);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container principal */
.center {
    padding: 2rem;
    text-align: center;
}

/* Liens de navigation */
a {
    margin: 0 1rem;
    text-decoration: none;
    color: var(--main);
    font-weight: 600;
    transition: color 0.3s ease;
}

/* Logo */
img {
    max-width: 450px;
    margin: 2rem auto;
    display: block;
}

/* Titres */
h1 {
    font-family: 'DisplayFont';
    font-size: 2.5rem;
    letter-spacing: 0.05rem;
    font-weight: 400;
    color: var(--main);
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.2rem;
    font-weight: normal;
    margin-bottom: 0.5rem;
}

/* button */

.btn {
  display: inline-block;
  background-color: var(--main);
  color: var(--alternate);
  padding: 12px 20px;
  text-decoration: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: bold;
}


/* ===== FOOTER ===== */
footer {
  background-color: var(--main);
  color: var(--background);
  text-align: center;
  padding: 20px;
  font-size: 14px;
}