/* Mobile First - Calculadora ROI */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 1rem;
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2rem;
    color: #1e293b;
    margin-bottom: 1rem;
}

.header p {
    color: #64748b;
    font-size: 1rem;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.input-section {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 15px;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #6366f1;
}

.results-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 15px;
}

.result-item {
    margin-bottom: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.result-label {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 1.2rem;
    font-weight: 700;
}

.roi-positive {
    color: #10b981;
}

.roi-negative {
    color: #ef4444;
}

.calculate-btn {
    width: 100%;
    background: #6366f1;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.calculate-btn:hover {
    background: #5856eb;
    transform: translateY(-2px);
}

.tips {
    background: #fef3c7;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #f59e0b;
}

.tips h3 {
    color: #92400e;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.tips ul {
    color: #92400e;
    padding-left: 1.5rem;
}

.tips li {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.back-btn {
    display: inline-block;
    background: #64748b;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.back-btn:hover {
    background: #475569;
}

/* Tablet - 768px and up */
@media (min-width: 768px) {
    body {
        padding: 2rem;
    }
    
    .calculator-container {
        padding: 3rem;
    }
    
    .header h1 {
        font-size: 2.5rem;
    }
    
    .header p {
        font-size: 1.1rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
        margin-bottom: 3rem;
    }
    
    .input-section {
        padding: 2rem;
    }
    
    .results-section {
        padding: 2rem;
    }
    
    .input-group {
        margin-bottom: 1.5rem;
    }
    
    .input-group label {
        font-size: 1rem;
    }
    
    .result-item {
        margin-bottom: 1.5rem;
    }
    
    .result-label {
        font-size: 0.9rem;
    }
    
    .result-value {
        font-size: 1.5rem;
    }
    
    .calculate-btn {
        font-size: 1.1rem;
    }
    
    .tips h3 {
        font-size: 1.2rem;
    }
    
    .tips li {
        font-size: 1rem;
    }
}