body {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: black;
    height: 100vh; 
    margin: 0;
}

#a {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    background-color: black;
    padding: 10px;
    text-align: center;
}

.logo {
    max-width: 400px;
    max-height: 400px;
    padding: 10px;
    margin: auto;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: black;
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    gap: 50px;
}

.b {
    display: flex;
    gap: 30px;
}

.btv {
    color: white;
    background-color: transparent;
    border: none;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 5px;
    outline: none;
}

.btv:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
.ac {
    display: flex;
    flex-direction: column;
    text-align: center;
    margin-top: 20px;
    color: white;
    padding: 20px;
    gap: 10px;
}

.ac p {
    margin-top: 20px;
    color: #ffffff;
    font-size: 18px;
    margin-bottom: 30px;
}


h1,
h2,
span {
    color: white;
}

img {
    width: auto;
    max-height: 100%;
}

.btn {
    margin: 0 auto;
    width: auto;
    height: 3rem;
    font-weight: 900;
    font-size: 20px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(to left, white 50%, rgb(0, 0, 0) 50%, rgb(66, 66, 65));
    background-size: 200%;
    background-position: 100%;
    transition: all ease 0.6s;
    text-align: center;
    line-height: 3rem;
}

.btn:hover span {
    background-position: 0%;
}

.btn:hover {
    background-position: 0%;
}

span {
    background: linear-gradient(to right, white 50%, rgb(0, 0, 0) 50%, rgb(66, 66, 58));
    background-size: 200%;
    background-position: 100%;
    -webkit-background-clip: text;
    color: transparent;
    transition: all ease 0.6s;
}

.hidden {
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 0s linear 0.5s;
}

.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 1s ease-in-out, visibility 0s linear;
}

.contai {
    max-width: 100%; 
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.app {
    position: relative;
    background-color: #fff;
    border-radius: 5px;
    padding: 30px;
    margin-bottom: 40px;
    width: calc(50% - 20px);
    box-sizing: border-box;
    transition: transform 0.3s ease;
    border-radius: 5px;
}

.app:hover {
    transform: scale(1.05);
}

.app h3 {
    color: #333;
    font-size: 24px;
    margin-bottom: 10px;
}

.app p {
    color: #666;
    font-size: 16px;
    margin-bottom: 20px;
}

.app a {
    display: inline-block;
    background-color: #666;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.app a:hover {
    background-color: #0056b3;
}

.appli {
    position: absolute;
    top: 100px !important;
    padding: 70px;
    background-color: #000000;
    text-align: center;
}

.s h2 {
    top: 0;
    margin: auto;
}

.cont {
    position: absolute;
    margin-top: 100px; 
    display: flex;
    flex-direction: column;
    text-align: center;
    color: white;
    padding: 20px;
    gap: 5px;
}

.cont img.logo {
    max-width: 100%; 
    max-height: 200px; 
    margin: auto;
}

.cont h3 {
    font-size: 24px;
    margin-bottom: 5px;
}

.cont p {
    font-size: 16px;
    margin-bottom: 5px;
}

.cont a {
    color: #fff;
    text-decoration: none;
}

.cont a:hover {
    text-decoration: underline;
}

.soc {
    margin-top: 20px;
}

.soc a {
    display: inline-block;
    margin-right: 10px;
}

.soc img {
    height: 50px;
    width: 50px;
}


.btv {
    background-color: black;
    border: none;
    color: #f4f4f4;
    transition: all ease 0.3s;
}
.h{
    color: #0056b3;
}
.btv:hover {
    color: #0056b3;
    background-color: rgba(255, 255, 255, 0.1);
}
@media only screen and (max-width: 768px) {
    .nav {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    p {
        font-size: 16px;
    }

    .btn {
        font-size: 14px;
    }
    .contai {
        flex-direction: column; 
        align-items: center; 
    }
    
    .app {
        width: 100%; 
    }
    .logo{
        margin-top: 30px;
        max-width: 90%;
    }

}