* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Monserrat', sans-serif;
}

body {
    padding: 0;
    margin: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background-color: #333;
    display: flex;
    justify-content: center;
    width: 100%;
}

.navbar a {
    text-align: center;
    padding: 14px;
    font-size: 17px;
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3px;
}

.navbar a:hover {
    background-color: #555;
}

.navbar-bottom {
    background-color: #222;
}

.davodev-section {
    box-sizing: border-box;
    display: flex;
    width: 100%;
    height: 40vh;
    justify-content: center;
    align-items: center;
    background-image: linear-gradient(180deg, #2465f1 0%, #1a4fd9 50%, #0f3ac1 100%);
}

.davodev-section img {
    width: 50%;
    height: auto;
}

.main-nav {
    background-color: #333;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-nav .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.main-nav a {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    margin: 0 5px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.main-nav a:hover {
    background-color: #2465f1;
}

.welcome-section {
    background-color: #333;
    color: white;
    padding: 30px;
    margin: 30px 0;
    border-radius: 8px;
    text-align: center;
}

.welcome-section h1 {
    color: #2465f1;
    margin-bottom: 15px;
}

.welcome-section h2 {
    color: #2465f1;
    margin-bottom: 15px;
}

.welcome-section p {
    font-size: 1.1rem;
    line-height: 1.7;
}

.content-section {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    margin-bottom: 30px;
}

.content-section h2 {
    color: #2465f1;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}

.content-section h3 {
    color: #555;
    margin: 20px 0 10px;
}

.content-section p {
    margin-bottom: 20px;
    color: #555;
}

.feature-list {
    list-style: none;
    margin: 20px 0;
}

.feature-list li {
    display: flex;
    margin-bottom: 15px;
    align-items: flex-start;
}

.code-tag {
    background-color: #333;
    color: #2465f1;
    padding: 5px 10px;
    border-radius: 4px;
    font-family: monospace;
    margin-right: 15px;
    min-width: 120px;
}

.description {
    flex: 1;
}

.lists-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}

.list-box {
    flex: 1;
    min-width: 250px;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #2465f1;
}

.list-box h3 {
    margin-top: 0;
    color: #2465f1;
}

.list-box ol,
.list-box ul {
    margin-left: 20px;
}

.list-box li {
    margin-bottom: 8px;
}

.multimedia-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}

.media-box {
    flex: 1;
    min-width: 250px;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #f16529;
}

.media-box h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: #2465f1;
}

.code-example {
    margin: 25px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.code-header {
    background-color: #333;
    color: white;
    padding: 10px 15px;
    font-family: monospace;
    font-size: 0.9rem;
}

.code-example pre {
    margin: 0;
    padding: 0;
}

.code-example code {
    display: block;
    background-color: #222;
    color: #f8f9fa;
    padding: 15px;
    overflow-x: auto;
    font-family: monospace;
    line-height: 1.5;
    font-size: 0.9rem;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 30px 20px;
    margin-top: 40px;
}

.footer-bio {
    max-width: 800px;
    margin: 15px auto;
    line-height: 1.8;
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #2465f1;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s;
}

.back-to-top:hover {
    background-color: #2465f1;
}

@media (max-width: 768px) {
    .logo-text {
        font-size: 3.5rem;
    }

    .main-nav a {
        margin: 5px;
    }

    .feature-list li {
        flex-direction: column;
    }

    .code-tag {
        margin-bottom: 8px;
        margin-right: 0;
    }

    .lists-container,
    .multimedia-container {
        flex-direction: column;
    }

    .list-box,
    .media-box {
        min-width: 100%;
    }

    form input,
    form select,
    form textarea,
    form button {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 2.5rem;
    }

    .lang-icon,
    .social-icon {
        margin: 0 5px;
        font-size: 0.8rem;
    }

    .welcome-section p {
        font-size: 1rem;
    }

    section h2 {
        font-size: 1.5rem;
    }

    .code-example code {
        font-size: 0.8rem;
    }
}