body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 90%;
    width: 350px;
}

h1 {
    font-size: 1.5rem;
    color: #1a1a1a;
    margin-bottom: 1.5rem;
}

#qrcode {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

#qrcode img {
    max-width: 100%;
}

#info {
    margin-top: 1rem;
    color: #4a4a4a;
    font-size: 0.9rem;
}

#current-code {
    font-family: monospace;
    font-weight: bold;
    word-break: break-all;
    display: block;
    margin-top: 0.5rem;
    color: #007bff;
}

#timer {
    font-weight: bold;
    color: #dc3545;
}