* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(170deg, #002736 0%, #00a4e6 100%);
    color: #ffffff;
    line-height: 1.7;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
}
 

header {
    margin-bottom: 20px;
}
 
header h1 {
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 225, 255, 0.5);
}
 

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}
 
nav ul li a {
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid #fff;
    border-radius: 5px;
    color: #fff;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 225, 255, 0.3);
}
 
nav ul li a:hover {
    background: #fff;
    color: #4a90e2;
    display: grid;
    gap: 15px;
}
 

footer {
    margin-top: auto;
    font-size: 0.9rem;
    opacity: 0.8;
}

hr {
    border: none;
    height: 4px;
    background: linear-gradient(90deg, #ffffff 0%, #005a7e 50%, #ffffff 100%);
    margin: 45px 0 45px 0;
    border-radius: 3px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}