body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #F5F7FA; /* Light gray background */
    margin: 0;
    padding: 0;
    color: #1A2B4C;
}
header {
    background: linear-gradient(90deg, #1A2B4C 60%, #0057B8 100%);
    color: #fff;
    padding: 2rem 0 1rem 0;
    text-align: center;
    box-shadow: 0 2px 8px rgba(26,43,76,0.08);
}
header h1 {
    margin: 0;
    font-size: 2.5rem;
    letter-spacing: 2px;
}
main {
    margin: 3rem auto;
    max-width: 700px;
    background: #F5F7FA;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(26,43,76,0.10);
    text-align: left;
}
section {
    margin-top: 2rem;
}
h2, h3 {
    color: #0057B8;
    margin-bottom: 0.5rem;
}
h2 {
    font-size: 2rem;
    border-bottom: 2px solid #00AEEF;
    padding-bottom: 0.3rem;
    margin-bottom: 1.2rem;
}
h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
}
ul {
    padding-left: 1.2rem;
    margin-bottom: 1.2rem;
}
ul li {
    margin-bottom: 0.7rem;
    color: #1A2B4C;
    background: #F5F7FA;
    border-left: 4px solid #00AEEF;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0,87,184,0.04);
}
p {
    color: #1A2B4C;
    font-size: 1.08rem;
    line-height: 1.7;
}
button {
    background: linear-gradient(90deg, #0057B8 60%, #00AEEF 100%);
    color: #fff;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    margin-top: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,87,184,0.10);
    transition: background 0.2s;
}
button:hover {
    background: linear-gradient(90deg, #1A2B4C 60%, #008080 100%);
}
#message {
    margin-top: 1.5rem;
    font-size: 1.1rem;
    color: #008080;
    text-align: center;
}
@media (max-width: 800px) {
    main {
        max-width: 98vw;
        padding: 1.2rem 0.5rem;
    }
}