/* Global Styles */
body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #333;
    color: white;
    padding: 20px 0;
}

header h1 {
    margin: 0;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

#hero {
    background: url('https://via.placeholder.com/1200x400') no-repeat center center/cover;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

#hero h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

#hero p {
    font-size: 1.2rem;
}

.btn {
    background-color: #333;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    display: inline-block;
}

#about, #skills, #contact {
    padding: 50px 0;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
}

p {
    text-align: center;
}

/* Project Grid Styles */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.project-item {
    background: #fff;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    text-align: center;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
}

.project-item img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 15px;
}

.project-item h3 {
    margin: 10px 0;
    font-size: 20px;
}

.project-item p {
    font-size: 14px;
    color: #555;
}

/* Back to Top Button Styles */
#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 15px;
    font-size: 16px;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    display: none;
}

#back-to-top:hover {
    background: #555;
}

/* Media Queries */
@media (max-width: 768px) {
    header {
        text-align: center;
    }

    nav ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 10px 0;
    }

    #hero {
        height: 300px;
    }

    #hero h2 {
        font-size: 2rem;
    }

    #hero p {
        font-size: 1rem;
    }

    .project-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 480px) {
    #hero {
        height: 200px;
    }

    #hero h2 {
        font-size: 1.5rem;
    }

    #hero p {
        font-size: 0.9rem;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }
}