body {
    font-family: system-ui, sans-serif;
    margin: 0;
    padding: 1rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
}
.container {
    max-width: 420px;
    width: 100%;
    text-align: center;
}
h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}
p {
    color: #444;
    line-height: 1.5;
    margin-bottom: 1rem;
}
#logo {
    width: 220px;
}
.example {
    font-family: monospace;
    background: #f6f8fa;
    padding: 0.6rem;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
    word-break: break-all;
}
.form {
    display: flex;
    gap: 0.5rem;
}
.green {
    color: #62B039;
}
input {
    flex: 1;
    padding: 0.7rem;
    font-size: 1rem;
}
button {
    padding: 0.7rem 1rem;
    font-size: 1rem;
    cursor: pointer;
}