* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    line-height: 1.6;
}

header {
    text-align: center;
    background: linear-gradient(90deg, #1e3c72, #2a5298);
    color: white;
    padding: 20px 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
}

header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
    background: #1e1e1e;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

section {
    margin-bottom: 30px;
}

h2 {
    font-size: 1.8rem;
    color: #90caf9;
    margin-bottom: 10px;
}

#wallet-balance {
    font-size: 1.5rem;
    color: #bbdefb;
    background: #263238;
    padding: 10px;
    border-radius: 5px;
    display: inline-block;
    margin-top: 10px;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    background: #2c2c2c;
    margin: 10px 0;
    padding: 15px;
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

li:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.6);
}

a {
    text-decoration: none;
    color: #90caf9;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}