body {
    font-family: 'Heebo', sans-serif;
    background-color: #f7f9fc;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.app-container {
    background-color: #ffffff;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    text-align: center;
    padding: 40px;
}

header {
    margin-bottom: 30px;
}

.logo {
    width: 180px;
    margin-bottom: 15px;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    color: #0052cc;
}

main {
    margin-bottom: 20px;
}

button {
    background-color: #0052cc;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 5px;
}

button:disabled {
    background-color: #cccccc;
    cursor: default;
}

button:hover:not(:disabled) {
    background-color: #003a99;
}

#status {
    margin-top: 20px;
    font-size: 14px;
    color: #666;
}

footer {
    font-size: 12px;
    color: #999;
    border-top: 1px solid #eaeaea;
    padding-top: 10px;
}