/* # Fundo com gradiente azul pastel */
body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(180deg, #e3f0ff 0%, #b3d8f7 100%);
    min-height: 100vh;
}

/* # Cabeçalho centralizado com cor suave */
h2 {
    color: #3a6ea5;
    text-align: center;
    margin-top: 32px;
    font-weight: 600;
}

/* # Container do leitor com sombra e borda arredondada */
#reader {
    margin: 24px auto;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(58,110,165,0.08);
    padding: 16px;
    display: flex;
    justify-content: center;
}

/* # Parágrafo de status com cor pastel */
#status {
    text-align: center;
    color: #6b7b8c;
    font-size: 1.1em;
    margin-bottom: 16px;
}

/* # Card de porcentagem com cor pastel e sombra */
#porcentagem {
    background: #f7fafd;
    color: #3a6ea5;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(58,110,165,0.07);
    padding: 12px 24px;
    text-align: center;
    font-size: 1.2em;
    margin: 0 auto 24px auto;
    width: fit-content;
}

/* # Botão estilizado com cor pastel e efeito hover */
button {
    display: block;
    margin: 32px auto 0 auto;
    background: #b3d8f7;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 32px;
    font-size: 1.1em;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(58,110,165,0.07);
    cursor: pointer;
    transition: background 0.2s;
}
button:hover {
    background: #3a6ea5;
}

/* # Onda azul decorativa no topo */
.onda {
    width: 100%;
    height: 80px;
    background: url('data:image/svg+xml;utf8,<svg width="100%25" height="100" viewBox="0 0 100 100" preserveAspectRatio="none" xmlns="http://www.w3.org/2000/svg"><path d="M0,30 Q50,80 100,30 L100,100 L0,100 Z" fill="%23b3d8f7"/></svg>');
    background-repeat: no-repeat;
    background-size: cover;
}