header {
    background: linear-gradient(135deg,#333333,#444444);
    text-align: center;
    padding: 1.5rem 0;
    position:fixed;
    width: 100%;
    top: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);

}

header:hover{
    filter: brightness(1.1);
}

nav a{
    color: rgb(0, 0, 0);
    text-decoration: none;
    margin: 0 0.5rem;
    position: relative;
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #ffffff;
    border-radius: 999px;
    transition: all 0.3s ease;

}

nav a:hover{
    background-color: #850000;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);

}

nav a:active{
    transform: scale(0.95);
    background-color: #2c3e50;
}

body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: rgb(247, 247, 247);

    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main{
    margin-top: 250px;
    flex: 1;
}

section{
    padding: 2rem;
    margin: auto;
    max-width: 800px;
    
}

section h2{
    border-bottom: 2px solid;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

li {
    padding: 0.5rem 0;
}

footer{
    text-align: center;
    padding: 1.9rem 1rem;
    background: linear-gradient(135deg,#444444,#333333);
    margin: 0;
}