/* Style de base pour la page */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #add8e6; /* Bleu clair */
    color: #333;
}

/* Style pour l'en-tête */
header {
    background-color: #add8e6;
    color: #333;
    padding: 20px 0;
    text-align: center;
    font-size: 2em;
}

/* Style pour la navigation */
nav {
    background-color: #fff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    font-size: 1.2em;
    transition: background-color 0.3s, color 0.3s;
}

nav ul li a:hover {
    background-color: #333;
    color: #fff;
}

/* Style pour le contenu principal */
main {
    padding: 20px;
    text-align: center;
}

/* Style pour les boutons de cours */
#course-buttons ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

#course-buttons ul li {
    margin: 0;
}

#course-buttons ul li a {
    display: block;
    padding: 15px 20px;
    background-color: #fff;
    color: #333;
    text-decoration: none;
    font-size: 1.2em;
    border: 2px solid #333;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

ul#chapters li {
    background-color: #e0f7e0;  /* Couleur de fond vert pâle */
    padding: 10px 15px;  /* Espacement interne */
    margin: 10px 0;  /* Espacement entre les éléments */
    border-radius: 10px;  /* Coins arrondis */
    list-style-type: none;  /* Supprime les puces */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);  /* Ombre légère */
}

#course-buttons ul li a:hover {
    background-color: #333;
    color: #fff;
}

/* Styles pour les chapitres */
#chapters ul {
    list-style-type: none; /* Supprimer les puces */
    padding: 0;
    text-align: left; /* Aligner les listes à gauche */
}

#chapters ul li {
    font-weight: bold; /* Texte en gras */
    font-size: 20px; /* Taille de la police */
    margin-bottom: 10px; /* Espacement entre les lignes */
}

#exerciseForm {
    margin-top: 20px;
}

#triangleCanvas {
    border: 1px solid #000;
    margin-bottom: 20px;
}

#result {
    margin-top: 10px;
    font-weight: bold;
}

/* Style pour les boutons de cours */
#exercise-links ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

#exercise-links ul li {
    margin: 0;
}

#exercise-links ul li a {
    display: block;
    padding: 15px 20px;
    background-color: #fff;
    color: #333;
    text-decoration: none;
    font-size: 1.2em;
    border: 2px solid #333;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

#exercise-links ul li a:hover {
    background-color: #333;
    color: #fff;
}

@font-face {
    font-family: 'Skintones';
    src: url('fonts/skintones.woff2') format('woff2'),
         url('fonts/skintones.woff') format('woff'),
         url('fonts/skintones.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Skintones', sans-serif;
}

/* Responsive Styles */

/* Styles pour les écrans de moins de 768px de large */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 10px 0;
    }

    #course-buttons ul,
    #exercise-links ul {
        flex-direction: column;
        align-items: center;
    }

    #course-buttons ul li a,
    #exercise-links ul li a {
        width: 80%;
        font-size: 18px;
        padding: 12px;
    }

    header {
        font-size: 1.5em;
        padding: 10px 0;
    }
}

/* Styles pour les écrans de moins de 480px de large */
@media (max-width: 480px) {
    header {
        font-size: 1.2em;
        padding: 8px 0;
    }

    nav ul li a {
        padding: 10px 15px;
        font-size: 16px;
    }

    #course-buttons ul li a,
    #exercise-links ul li a {
        width: 100%;
        font-size: 16px;
        padding: 10px;
    }

    ul#chapters li {
        font-size: 18px;
        padding: 8px 10px;
    }

    main {
        padding: 15px;
    }
}
/* Encadré blanc pour le tableau */
#canvas-container {
    background-color: #ffffff;
    border: 2px solid #ccc;
    border-radius: 10px;
    padding: 10px;
    margin: 20px auto;
    position: relative;
    max-width: 100%;
    box-sizing: border-box;
}

/* Style pour les canevas */
#drawing-canvas {
    border: 1px solid #000;
    background-color: #f9f9f9;
    border-radius: 5px;
    cursor: crosshair;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Barre d'outils */
#toolbar {
    margin: 10px 0;
    text-align: center;
    flex-wrap: wrap;
}

#toolbar select, #toolbar input, #toolbar button {
    margin: 5px;
    padding: 8px;
    font-size: 14px;
    min-width: 80px;
}

/* Styles spécifiques pour petits écrans */
@media only screen and (max-width: 768px) {
    #toolbar {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    #drawing-canvas {
        width: 100%;
        height: 300px;
    }
}

@media only screen and (max-width: 480px) {
    #toolbar {
        flex-direction: column;
    }

    #drawing-canvas {
        height: 250px;
    }

    #toolbar select, #toolbar input, #toolbar button {
        font-size: 12px;
        padding: 6px;
    }
}