/* Ligne sous les titres principaux */
h2, h3 {
    position: relative;
    padding-bottom: 0.5em;
    margin-bottom: 1.2em;
}
h2::after, h3::after {
    content: "";
    display: block;
    width: 100%;
    height: 2px;
    background: #ddd;
    margin: 0.5em auto 0 auto;
    border-radius: 2px;
}
/* Logo */
.logo {
    display: block;
    margin: 0 auto 1rem auto;
    max-height: 80px;
}
body {
    font-family: Calibri, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(120deg, #f8fafc 0%, #e3eafc 100%);
    min-height: 100vh;
    color: #000;
    line-height: 1.7;
}


header {
    background: #f6f8fc;
    color: #FF0000;
    padding: 2.5rem 0 1.5rem 0;
    text-align: center;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.06);
    margin-bottom: 2rem;
}

.logo {
    display: block;
    margin: 0 auto 1rem auto;
    max-height: 80px;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.08));
}

h1 {
    font-family: 'Modern No. 20', 'Times New Roman', Times, serif;
    font-size: 36px;
    color: #FF0000;
    margin-bottom: 0.3em;
    letter-spacing: 1px;
}

h2 {
    font-family: 'Modern No. 20', 'Times New Roman', Times, serif;
    font-size: 26px;
    color: #FF0000;
    margin-top: 2em;
    margin-bottom: 0.5em;
    letter-spacing: 0.5px;
}


main, .main {
    text-align: center;
    margin: 3rem auto 2rem auto;
    font-size: 16px;
    color: #000;
    max-width: 800px;
    background: #ffffffcc;
    border-radius: 16px;
    box-shadow: 0 2px 16px 0 rgba(0,0,0,0.06);
    padding: 2rem 2.5rem;
    backdrop-filter: blur(1px);
}

section.alt, .alt-bg {
    background: #eaf1fbcc;
    border-radius: 16px;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.03);
    margin: 2rem auto;
    padding: 2rem 2.5rem;
    max-width: 800px;
}

nav {
    margin: 2rem 0 1rem 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
    background: #f0f4fa;
    border-radius: 30px;
    box-shadow: 0 1px 8px 0 rgba(0,0,0,0.04);
    padding: 0.5rem 0;
}
nav a {
    text-decoration: none;
    color: #0000ff;
    font-weight: 600;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    font-size: 16px;
    box-shadow: 0 0 0 rgba(0,0,0,0);
}
nav a:hover, nav a:focus {
    background: #FF0000;
    color: #fff;
    box-shadow: 0 2px 8px 0 rgba(255,0,0,0.10);
    outline: none;
}

ul, li {
    text-align: left;
    margin: 0 auto;
    max-width: 600px;
    font-size: 16px;
}

.important, .info, .highlight {
    color: #ff7f00;
    font-weight: bold;
}

/* Ajout d'un effet subtil sur les titres importants */
h1, h2 {
    text-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

/* Amélioration des listes */
ul {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
}
li {
    margin-bottom: 0.5em;
}

/* Responsive */
@media (max-width: 800px) {
    main, .main {
        padding: 1.2rem 0.5rem;
    }
}
@media (max-width: 600px) {
    nav {
        flex-direction: column;
        gap: 1rem;
        padding: 0.5rem 0.2rem;
    }
    main, .main {
        font-size: 15px;
        padding: 1rem 0.2rem;
    }
    h1 {
        font-size: 32px;
    }
    h2 {
        font-size: 24px;
    }
}