body {
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    background-color: #0056b3;
    color: white;
    width: 100%;
    text-align: center;
    padding: 20px 0;
    font-size: 1.2rem;
}

#app-container {
    background: white;
    width: 90%;
    max-width: 600px;
    margin-top: 20px;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.texto-destaque {
    font-size: 1.2rem;
    line-height: 1.6;
    background: #eef2f3;
    padding: 15px;
    border-left: 5px solid #0056b3;
}

.video-fake {
    width: 100%;
    height: 200px;
    background-color: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    margin-bottom: 15px;
    border-radius: 5px;
    font-weight: bold;
}

.btn-alternativa {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 15px;
    font-size: 1.1rem;
    cursor: pointer;
    background-color: #ffffff;
    border: 2px solid #0056b3;
    border-radius: 5px;
    color: #0056b3;
    transition: 0.3s;
    text-align: left;
}

.btn-alternativa:hover:not(:disabled) {
    background-color: #0056b3;
    color: white;
}

.btn-alternativa:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.feedback-msg {
    font-size: 1.2rem;
    font-weight: bold;
    margin-top: 20px;
    color: #d9534f;
}