/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #F8FAFC;
    color: #0F172A;
    line-height: 1.6;
}

header {
    background-color: #FFFFFF;
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid #E5E7EB;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #2563EB;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.secao-gerador, .exibicao-grafico {
    background-color: #FFFFFF;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid #E5E7EB;
}

.secao-gerador h2, .exibicao-grafico h2 {
    margin-bottom: 1rem;
    color: #0F172A;
}

.grupo-formulario {
    margin-bottom: 1.5rem;
}

.grupo-formulario label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #0F172A;
}

.grupo-formulario select, .grupo-formulario textarea, .grupo-formulario input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #E5E7EB;
    border-radius: 4px;
    font-size: 1rem;
    background-color: #FFFFFF;
    color: #0F172A;
    margin-bottom: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.grupo-formulario select:focus, .grupo-formulario textarea:focus, .grupo-formulario input[type="number"]:focus {
    border-color: #2563EB;
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.grupo-formulario textarea {
    height: 100px;
    resize: vertical;
}

/* Remove spinners dos inputs number */
.grupo-formulario input[type="number"]::-webkit-outer-spin-button,
.grupo-formulario input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.grupo-formulario input[type="number"]::-moz-appearance {
    appearance: textfield;
}

#botao-gerar {
    background-color: #2563EB;
    color: #FFFFFF;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#botao-gerar:hover {
    background-color: #1E40AF;
}

#area-grafico {
    height: 300px;
    border: 2px dashed #E5E7EB;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #DBEAFE;
    color: #64748B;
    font-size: 1.2rem;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #FFFFFF;
    border-top: 1px solid #E5E7EB;
    color: #64748B;
}

/* Responsividade */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    main {
        padding: 0 0.5rem;
    }
    .secao-gerador, .exibicao-grafico {
        padding: 1rem;
    }
}

canvas {
    width: 98%;
    height: 98%;
}