/* Estilos Modernizados da Calculadora de ITBI */
:root {
    --itbi-primary: #3498db;
    --itbi-primary-dark: #2980b9;
    --itbi-secondary: #2ecc71;
    --itbi-danger: #e74c3c;
    --itbi-text: #2c3e50;
    --itbi-text-light: #7f8c8d;
    --itbi-bg: #f8f9fa;
    --itbi-white: #ffffff;
    --itbi-border: #e1e8ed;
    --itbi-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.calculadora-itbi {
    max-width: 650px;
    margin: 30px auto;
    padding: 30px;
    background: var(--itbi-white);
    border-radius: 12px;
    box-shadow: var(--itbi-shadow);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--itbi-text);
}

.calculadora-itbi h3 {
    color: var(--itbi-text);
    text-align: center;
    margin-bottom: 30px;
    font-size: 26px;
    font-weight: 700;
}

.campo-grupo {
    margin-bottom: 22px;
}

.campo-grupo label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    font-size: 15px;
}

.campo-grupo input[type="text"],
.campo-grupo input[type="number"],
.campo-grupo select {
    width: 100%;
    padding: 14px;
    border: 2px solid var(--itbi-border);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    box-sizing: border-box;
    background-color: #fff;
}

.campo-grupo input[type="text"]:focus,
.campo-grupo input[type="number"]:focus,
.campo-grupo select:focus {
    outline: none;
    border-color: var(--itbi-primary);
    box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.15);
}

.campo-grupo input[type="checkbox"] {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    vertical-align: middle;
    cursor: pointer;
}

.campo-grupo .checkbox-label {
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    display: inline-block;
    vertical-align: middle;
}

.mensagem-erro {
    color: var(--itbi-danger);
    font-size: 13px;
    margin-top: 6px;
    display: block;
}

.erro-campo {
    border-color: var(--itbi-danger) !important;
}

/* Grupo de botões */
.botoes-grupo {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 15px;
    margin-top: 30px;
}

#calcular-btn,
#limpar-btn {
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

#calcular-btn {
    background: linear-gradient(135deg, var(--itbi-primary), var(--itbi-primary-dark));
    color: white;
}

#calcular-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

#limpar-btn {
    background: #f1f3f5;
    color: var(--itbi-text-light);
}

#limpar-btn:hover {
    background: #e9ecef;
    color: var(--itbi-text);
}

/* Resultado */
.resultado {
    margin-top: 35px;
    padding: 25px;
    background: #f0f9ff;
    border: 1px solid #bae1ff;
    border-radius: 12px;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.resultado h4 {
    color: var(--itbi-primary-dark);
    margin-bottom: 20px;
    font-size: 20px;
    text-align: center;
    border-bottom: 2px solid rgba(52, 152, 219, 0.1);
    padding-bottom: 10px;
}

.resultado-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.resultado-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.resultado-total {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.resultado-label {
    font-size: 14px;
    color: var(--itbi-text-light);
    font-weight: 500;
}

.resultado-valor {
    font-weight: 700;
    color: var(--itbi-text);
    font-size: 18px;
}

.resultado-valor.destaque {
    font-size: 32px;
    color: var(--itbi-secondary);
    display: block;
    margin-top: 5px;
}

.info-cidade {
    text-align: center;
    font-size: 13px;
    color: var(--itbi-text-light);
    margin-top: 15px;
}

.aviso {
    background: #fff9db;
    border-left: 4px solid #fcc419;
    color: #856404;
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
    font-size: 14px;
    line-height: 1.5;
}

/* FAQ e Explicação */
.explicacao {
    margin-top: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 12px;
}

.explicacao h4 {
    margin-bottom: 15px;
    color: var(--itbi-text);
}

.explicacao ul {
    padding-left: 20px;
    margin-top: 10px;
}

.explicacao li {
    margin-bottom: 10px;
    color: var(--itbi-text-light);
    font-size: 14px;
}

.faq-itbi {
    margin-top: 40px;
}

.faq-itbi h2 {
    font-size: 22px;
    margin-bottom: 25px;
    text-align: center;
}

.faq-itbi details {
    margin-bottom: 10px;
    border: 1px solid var(--itbi-border);
    border-radius: 8px;
    overflow: hidden;
}

.faq-itbi summary {
    padding: 15px 20px;
    background: white;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-itbi summary:hover {
    background: #f8f9fa;
}

.faq-itbi p {
    padding: 15px 20px;
    background: #fff;
    border-top: 1px solid var(--itbi-border);
    font-size: 14px;
    line-height: 1.6;
    color: var(--itbi-text-light);
}

/* Responsividade */
@media (max-width: 600px) {
    .calculadora-itbi {
        padding: 20px;
        margin: 15px;
    }
    
    .botoes-grupo {
        grid-template-columns: 1fr;
    }
    
    .resultado-grid {
        grid-template-columns: 1fr;
    }
    
    .resultado-valor.destaque {
        font-size: 26px;
    }
}