.calculadora-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.calculadora-container h2 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.2em;
    font-weight: 600;
}

.calculadora-container p {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.calculadora-form {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 200px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #34495e;
    font-size: 0.95em;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.periodo-container {
    display: flex;
    gap: 10px;
}

.periodo-container input {
    flex: 2;
}

.periodo-container select {
    flex: 1;
}

.parametros-section,
.investimentos-section {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 2px solid #ecf0f1;
}

.parametros-section h3,
.investimentos-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.3em;
    font-weight: 600;
}

.calcular-button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.calcular-button:hover {
    background: linear-gradient(135deg, #2980b9, #21618c);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.resultados-container {
    background: #ffffff;
    padding: 25px;
    border-radius: 10px;
    border: 2px solid #ecf0f1;
}

.resultados-container h3 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 25px;
    font-size: 1.5em;
    font-weight: 600;
}

.resultados-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.resultado-item {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    border: 2px solid #dee2e6;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resultado-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.resultado-item h4 {
    color: #495057;
    margin-bottom: 10px;
    font-size: 1.1em;
    font-weight: 600;
}

.valor-final {
    font-size: 1.8em;
    font-weight: 700;
    color: #27ae60;
    margin-bottom: 8px;
}

.rendimento {
    color: #6c757d;
    font-size: 0.95em;
    font-weight: 500;
}

.grafico-container {
    margin-top: 30px;
    padding: 20px;
    background: #ffffff;
    border-radius: 10px;
    border: 2px solid #ecf0f1;
}

/* Responsividade */
@media (max-width: 768px) {
    .calculadora-container {
        padding: 15px;
        margin: 10px;
    }
    
    .form-row {
        flex-direction: column;
        gap: 15px;
    }
    
    .form-group {
        min-width: auto;
    }
    
    .resultados-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .calculadora-container h2 {
        font-size: 1.8em;
    }
    
    .valor-final {
        font-size: 1.5em;
    }
}

@media (max-width: 480px) {
    .calculadora-form {
        padding: 15px;
    }
    
    .resultado-item {
        padding: 15px;
    }
    
    .grafico-container {
        padding: 15px;
    }
}