/* Reset de base */
body, h1, h2, h3, p, ul, li, a {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Style général */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
    padding: 0;
}

/* En-tête */
header {
    background: #333; /* Couleur sombre comme sur CUB */
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

header nav ul li {
    display: inline;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

header nav ul li a:hover {
    text-decoration: underline;
}

/* Conteneur principal */
main {
    max-width: 1200px;
    margin: 20px auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Titres */
main h1 {
    text-align: center;
    color: #333; /* Couleur sombre pour les titres */
    margin-bottom: 20px;
}

main h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #333; /* Couleur sombre pour les sous-titres */
    border-bottom: 2px solid #e4e4f4; /* Bordure claire comme sur CUB */
    padding-bottom: 5px;
}

/* Paragraphes */
main p {
    margin-bottom: 15px;
    line-height: 1.8;
    text-align: justify;
}

/* Sections */
section {
    margin-bottom: 30px;
    padding: 20px;
    background: #e4e4f4; /* Fond clair comme sur CUB */
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Liens */
a {
    color: #386269; /* Couleur des liens comme sur CUB */
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Pied de page */
footer {
    text-align: center;
    margin-top: 20px;
    padding: 10px 0;
    background: #333; /* Couleur sombre comme sur CUB */
    color: #fff;
    border-radius: 8px;
}

footer p {
    font-size: 0.9rem;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #386269; /* Couleur des boutons comme sur CUB */
    text-decoration: none;
    border-radius: 5px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #2c4d50; /* Couleur au survol comme sur CUB */
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    main {
        padding: 10px;
    }

    header nav ul {
        flex-direction: column;
        gap: 10px;
    }
}
.back-to-top {
    position: fixed;
    top: 10px;
    left: 10px;
    background: #386269;
    color: #fff;
    padding: 0.5em 1em;
    border-radius: 5px;
    text-decoration: none;
    z-index: 1100;
    opacity: 0.8;
    transition: transform 0.4s ease, opacity 0.3s ease;
}

.back-to-top:hover {
    transform: translateX(-10px); 
    opacity: 1;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #386269; 
    text-decoration: none;
    border-radius: 5px; 
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); 
    transition: background-color 0.3s ease, transform 0.2s ease; 
}

.btn:hover {
    background-color: #2c4d50; 
    transform: translateY(-2px); 
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15); 
}



.cta {
    position: relative;
    margin: auto;
    padding: 12px 18px;
    transition: all 0.2s ease;
    border: none;
    background: none;
    cursor: pointer;
  }
  
  .cta:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    border-radius: 50px;
    background: #b1dae7;
    width: 45px;
    height: 45px;
    transition: all 0.3s ease;
  }
  
  .cta span {
    position: relative;
    font-family: "Ubuntu", sans-serif;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: #234567;
  }
  
  .cta svg {
    position: relative;
    top: 0;
    margin-left: 10px;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke: #234567;
    stroke-width: 2;
    transform: translateX(-5px);
    transition: all 0.3s ease;
  }
  
  .cta:hover:before {
    width: 100%;
    background: #b1dae7;
  }
  
  .cta:hover svg {
    transform: translateX(0);
  }
  
  .cta:active {
    transform: scale(0.95);
  }