body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5; /* Fond clair */
    color: #333; /* Texte foncé pour mode clair */
    transition: background-color 0.3s ease, color 0.3s ease;
    animation: appear 3s ease;
}

h1 {
    color: #e63946;
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
    text-decoration: underline;
    margin-top: -20px;
    margin-bottom: 30px;
    font-size: 2.5rem;
}

h2 {
    color: #457b9d;
}

h3 {
    color: #457b9d;
    margin-top: 20px;
    margin-bottom: 10px;
    text-align: left;
}

strong {
    color: gold;
}

.date-time {
    text-align: center;
    margin-bottom: 20px;
    font-style: italic;
    color: #555; /* Couleur de texte pour la date en mode clair */
}

.code-container {
    background-color: #fff; /* Fond blanc pour les conteneurs en mode clair */
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    padding: 20px;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.code-container:hover {
    transform: translateY(-5px);
}

pre {
    margin: 0;
    padding: 0;
}

code {
    color: #1d3557; /* Couleur de texte pour le code en mode clair */
    font-size: 16px;
    display: block;
    background-color: #f1faee; /* Fond légèrement coloré pour le code en mode clair */
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #457b9d;
    overflow-x: auto;
    transition: background-color 0.3s ease, color 0.3s ease;
}

hr {
    border: none;
    height: 2px;
    background-color: #a8dadc;
    margin: 30px 0;
}

.comment {
    color: #6c757d; /* Couleur des commentaires en mode clair */
}

.btn {
    /* Vert élégant */
    background-color: #4CAF50;
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: inline-block;
    font-size: 16px;
    font-weight: bold;
    margin-left: 50%;
    padding: 12px 24px;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
    /* Animation de pulsation */
    animation: pulse 2s infinite;
    /* Ombre portée pour effet de profondeur */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

/* Animation de pulsation subtile */
@keyframes pulse {
    0% {
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    50% {
        box-shadow: 0 8px 16px rgba(76, 175, 80, 0.4);
    }

    100% {
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }
}

/* Effet d'ondulation au clic */
.btn::after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, #fff 10%, transparent 10.01%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform 0.5s, opacity 0.8s;
}

.btn:active::after {
    transform: scale(0, 0);
    opacity: 0.3;
    transition: 0s;
}

.btn:hover {
    background-color: #45a049;
    transform: scale(1.05);
    border: 2px solid #000000;
    /* Animation de brillance au survol */
    animation: glow 1.5s infinite alternate;
}

/* Animation de brillance */
@keyframes glow {
    from {
        box-shadow: 0 0 5px rgba(76, 175, 80, 0.5);
    }

    to {
        box-shadow: 0 0 20px rgba(76, 175, 80, 0.8);
    }
}

/* Animation de clic */
@keyframes click-animation {
    0% {
        transform: scale(0.95);
        background-color: #3e8e41;
    }

    50% {
        transform: scale(0.9);
        background-color: #2d682f;
    }

    100% {
        transform: scale(0.95);
        background-color: #3e8e41;
    }
}

/* Animation d'ondulation pour l'état actif */
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }

    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes appear {
    0% {
        opacity: 0;
        transform: translateY(-100px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn:active {
    background-color: #3e8e41;
    transform: scale(0.95);
    /* Animation de clic */
    animation: click-animation 0.3s ease;
    /* Effet d'ondulation amélioré */
    position: relative;
    overflow: hidden;
}

.btn:active::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: ripple 0.6s linear;
}

/* ----------- Dark mode */

/* Bouton dark mode */
.btn-darkmode {
    background-color: #4CAF50;
    /* Position en haut à droite */
    position: fixed;
    top: 20px;
    right: 20px;
    /* Style du bouton */
    border: none;
    color: white;
    padding: 12px 24px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 30px;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn-darkmode:hover {
    background-color: #45a049;
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* Styles spécifiques pour le mode clair */
body:not(.dark-mode) .btn-darkmode {
    background-color: #74c0fc;
    color: #222;
}

body:not(.dark-mode) .btn-darkmode:hover {
    background-color: #4dabf7;
    border: 2px solid #1971c2;
}

/* Dark mode */
.dark-mode {
    background-color: #222;
    color: #f0f0f0;
}

.dark-mode h1 {
    color: #ff6b6b;
}

.dark-mode h3 {
    color: #74c0fc;
}

.dark-mode .date-time {
    color: #adb5bd;
}

.dark-mode .code-container {
    background-color: #333;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.dark-mode .btn {
    background-color: #2d8a30;
    color: #f0f0f0;
}

.dark-mode .btn:hover {
    background-color: #3a9d3d;
    border: 2px solid #f0f0f0;
}

.dark-mode code {
    background-color: #444;
    color: #f8f9fa;
    border-left: 4px solid #74c0fc;
}

.dark-mode .comment {
    color: #adb5bd;
}

/* Cartes de déroulement */

.card {
    border: 1px solid #ccc;
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    padding: 15px;
    background-color: #f5f5f5;
    cursor: pointer;
    font-weight: bold;
}

.card-body {
    display: none;
    padding: 15px;
}

.card.active .card-body {
    display: block;
}

.dark-mode .card-header {
    background-color: #333;
    color: #fff;
}

.dark-mode .card {
    border-color: #444;
    background-color: #222;
}

/* Bouton vers cours html */

#btn-cours-html {
    margin-top: 70px !important;
    animation: pulse 2s infinite;
    text-decoration: none !important;
    color: #000000;
    font-weight: bold;
    font-size: 1.2rem;
}

#btn-cours-html:hover {
    background-color: #45a049;
    transform: scale(1.05);
    border: 2px solid #000000;
}

#btn-cours-html a {
    text-decoration: none !important;
    color: #000000;
}

.btn-jeu {
    margin-bottom: 20px;
}