body {
    font-family: Arial, sans-serif;
    background-color: #f0f4f8;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
    text-align: center;
}

.card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    padding: 40px 20px;
    margin-bottom: 20px;
}

.logo {
    width: 120px;
    height: auto;
    margin-bottom: 20px;
}

h1 {
    color: #4caf50;
    margin-bottom: 30px;
}

p {
    margin: 10px 0;
    line-height: 1.6;
}

button {
    background-color: #4caf50;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 16px;
    margin-top: 20px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #388e3c;
}

.footer {
    color: #888;
    font-size: 14px;
}

.success-message {
    color: #4caf50;
    font-weight: bold;
    font-size: 20px;
}

.error-message {
    color: #f44336;
    font-weight: bold;
    font-size: 20px;
}

/* Spinner für Ladeanimation */
.spinner {
    width: 40px;
    height: 40px;
    margin: 20px auto;
    border: 4px solid rgba(76, 175, 80, 0.2);
    border-top: 4px solid #4caf50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}