/* Configuração geral */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #ffffff;
}

/* Cabeçalho e navegação */
header {
    background: #1e1e1e;
    color: #ffffff;
    text-align: center;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

nav {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

nav button {
    background: #457ae8;
    color: #ffffff;
    border: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
}

nav button:hover {
    background: #457ae8;
}

nav button.ativo {
    background: #4caf50;
}

/* Abas */
.aba {
    display: none;
    padding: 1rem;
}

.aba.ativa {
    display: block;
}

/* Estilo das listas */
.item {
    background-color: #1e1e1e;
    border: 1px solid #333333;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.item h2 {
    margin: 0 0 1rem;
    color: #ffffff;
}

.item.feito {
    color: #2196f3;
    text-decoration: line-through;
    font-weight: bold;
}

/* Botões */
button {
    background: #457ae8;
    color: #ffffff;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    font-weight: bold;
}

button:hover {
    background: #5883d8;
}

/* Gráfico */
canvas {
    display: block;
    margin: 2rem auto;
    max-width: 100%;
    background: #1e1e1e;
    border-radius: 10px;
    padding: 1rem;
}