@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500&display=swap");

:root {
    --bg: #363fff;
    --bg2: #3138c6;
    --title: #293245;
    --secondary-light: rgba(34, 124, 112, 0.2);
    --secondary-light-2: rgba(127, 183, 126, 0.1);
    --white: #fff;
    --black: #393e46;
    --green: #00FF96;
    --blue: #00A2FF;

    --shadow: 0px 2px 8px 0px var(--secondary-light);
}

* {
    font-family: "Poppins", sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}


nav {
    background-color: #124559;
}

main {
    display: flex;
    flex-direction: column;
    padding: 300px 10% 50px 10%;
    gap: 40px;
    color: black;
}

/* Titre principal */
h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    text-align: center;
    color: #111;
}

/* Titres de section */
h2, h3, h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: #0056b3;
}

h2 {
    font-size: 1.4rem;
}
h3 {
    font-size: 1.2rem;
}
h4 {
    font-size: 1rem;
    font-weight: 500;
    color: #333;
}

/* Paragraphes */
p {
    margin-bottom: 1rem;
    text-align: justify;
}

/* Sommaire */
nav.toc {
    background-color: #fff;
    padding: 1rem 1.25rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
nav.toc h2 {
    margin-top: 0;
}
nav.toc ul {
    padding-left: 1.2rem;
    margin: 0.5rem 0 0 0;
    list-style-type: none;
}
nav.toc ul li {
    margin-bottom: 0.4rem;
}
nav.toc a {
    color: #0056b3;
    text-decoration: underline;
}
nav.toc a:hover {
    color: #003d80;
}

/* Articles */
section, article {
    background-color: #fff;
    padding: 1rem 1.25rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Listes */
ul {
    padding-left: 1.2rem;
    margin-bottom: 1rem;
}
li {
    margin-bottom: 0.5rem;
}

/* Liens */
a {
    color: #0056b3;
    text-decoration: underline;
}
a:hover {
    color: #003d80;
}

/* Notes / footer */
.note {
    font-size: 0.9rem;
    color: #555;
    font-style: italic;
}
.footer {
    text-align: center;
    font-size: 0.9rem;
    color: #555;
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    main {
        padding: 1rem;
    }
    h1 {
        font-size: 1.6rem;
    }
    h2 {
        font-size: 1.2rem;
    }
}
@media (max-width: 480px) {
    body {
        font-size: 0.95rem;
    }
    h1 {
        font-size: 1.4rem;
    }
    h2 {
        font-size: 1.1rem;
    }
}


/* css pour le fleche de remonter  */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 100;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 50%;
    padding: 10px 15px;
    font-size: 18px;
    cursor: pointer;
    display: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease-in-out;
}

#backToTop:hover {
    background-color: #555;
}