body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(120deg, #f0f4f8 0%, #e0e7ef 100%);
    margin: 0;
    color: #222;
}

header {
    background: #2d3e50;
    color: #fff;
    padding: 30px 0 10px 0;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 2.5rem;
    letter-spacing: 2px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 30px;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    transition: color 0.2s;
}

nav a:hover {
    color: #ffb347;
}

main {
    max-width: 700px;
    margin: 40px auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(44,62,80,0.07);
    padding: 40px 30px;
}

section {
    margin-bottom: 40px;
}

h2 {
    color: #2d3e50;
    margin-top: 0;
    font-size: 2rem;
    border-bottom: 2px solid #ffb347;
    display: inline-block;
    padding-bottom: 5px;
}

footer {
    text-align: center;
    padding: 20px 0;
    background: #2d3e50;
    color: #fff;
    margin-top: 40px;
    font-size: 1rem;
    letter-spacing: 1px;
    border-radius: 0 0 12px 12px;
}

a {
    color: #2d3e50;
    text-decoration: underline;
}
a:hover {
    color: #ffb347;
}

@media (max-width: 800px) {
    main {
        padding: 25px 10px;
        margin: 20px 8px;
    }
    h2 {
        font-size: 1.4rem;
    }
    header h1 {
        font-size: 1.5rem;
    }
    nav ul {
        gap: 15px;
        font-size: 0.95rem;
    }
    footer {
        font-size: 0.95rem;
        padding: 14px 0;
    }
}

@media (max-width: 500px) {
    main {
        padding: 10px 2px;
        margin: 10px 2px;
    }
    header {
        padding: 18px 0 6px 0;
    }
    nav ul {
        flex-direction: column;
        gap: 8px;
    }
    h2 {
        font-size: 1.1rem;
    }
    header h1 {
        font-size: 1.1rem;
    }
}