/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Navbar */
.navbar {
    background-color: #282e34;
}
.navbar-brand, .nav-link, .dropdown-item {
    color: white !important;
}

/* Sections */
.sec-1 {
    width: 100%;
    padding: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
}
.text-part {
    padding: 10px;
    text-align: center;
}
.sec-1 h1 {
    font-size: 36px;
    color: #333333;
}
.sec-1 h3 {
    font-size: 24px;
    color: #555555;
    margin-top: 20px;
}
.img-part {
    padding-left: 50px;
}
.img-part img {
    border-radius: 15px;
    box-shadow: 0px 0px 15px 0px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    height: auto;
}

.download {
    text-decoration: none;
    padding: 10px 20px;
    background-color: red;
    border-radius: 20px;
    color: white;
    transition: background-color 0.3s ease;
    display: inline-block;
}
.download:hover {
    background-color: darkred;
}
.button {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    text-align: center;
}
.sec-2 {
    background-color: #fff;
    padding: 20px;
}
.App-part {
    display: flex;
    justify-content: flex-start;
    padding: 30px 0;
    overflow-x: auto;
    scroll-behavior: smooth;
}
.App-part .app-img {
    padding: 20px;
    flex: 0 0 auto;
}
.App-part .app-img img {
    width: 350px;
    height:550px;
    border-radius: 10px;
    box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.1);
}

.sec-3 .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px;
}
.sec-3 .container .text-part {
    text-align: left;
}

/* Footer */
.footer {
    background-color: #282e34;
    color: #ddd;
    padding: 20px;
    font-size: 20px;
    text-align: center;
}

/* Media Queries */
@media screen and (max-width: 820px) {
    body {
        text-align: center;
    }
    .sec-1, .sec-3 {
        padding: 10px;
        display: block;
        text-align: center;
    }
    .sec-1 .img-part img {
        width: 100%;
        max-width: 200px;
        height: auto;
    }
    .sec-3 .container {
        display: block;
        flex-direction: column-reverse;
    }
    .sec-2 {
        padding: 20px;
    }
    .sec-1 .img-part {
        padding-left: 0;
        padding-top: 50px;
    }
    .button {
        display: block;
        margin-top: 15px;
    }
    .sec-1 h1 {
        font-size: 28px;
    }
    .sec-1 h3 {
        font-size: 20px;
        margin-top: 15px;
    }
    .App-part {
        padding: 10px 0;
    }
    .App-part .app-img img {
        max-width: 200px;
        height: auto;
    }
    .footer {
        font-size: 16px;
    }
}