/* Global Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}

body {
    background-color: #f0f2f5;
    color: #333;
}

/* Header */
.header {
    background-color: #28a745;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 20px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 1200px;
}

.logo {
    height: 80px;
    object-fit: contain;
    margin-right: 20px;
}

.header-title {
    color: white;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
    flex-grow: 1;
}

/* Calculator Styles */
.calculator-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding: 40px 20px;
}

.calculator-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 30px;
    max-width: 600px;
    width: 100%;
}

.calculator-card h2 {
    color: #28a745;
    border-bottom: 2px solid #28a745;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.input-block h3 {
    margin: 20px 0 10px;
    color: #555;
}

.input-group, .dynamic-input-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

label {
    min-width: 150px;
}

input[type="text"], input[type="number"], select {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

.add-btn, .remove-btn {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.remove-btn {
    background-color: #dc3545;
}

.add-btn:hover, .remove-btn:hover {
    filter: brightness(1.1);
}

.results-block {
    margin-top: 30px;
}

.margin-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.margin-item {
    background: #e9ecef;
    border-radius: 6px;
    padding: 15px;
    text-align: center;
}

.margin-percent {
    font-weight: bold;
    font-size: 1.2rem;
    color: #28a745;
    margin-bottom: 5px;
}

.margin-item span, .net-profit-results span {
    font-weight: bold;
    color: #007bff;
}

.net-profit-results p {
    font-size: 1rem;
    margin-bottom: 10px;
}

.final-result {
    font-size: 1.2rem;
    font-weight: bold;
    color: #28a745;
    margin-top: 15px;
    border-top: 1px solid #ccc;
    padding-top: 10px;
}

/* Footer */
.footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    width: 100%;
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    .header {
        height: 60px;
        padding: 0 10px;
    }

    .logo {
        height: 40px;
        margin-right: 10px;
    }

    .header-title {
        font-size: 1rem;
    }

    .calculator-container {
        padding: 20px 10px;
    }

    .calculator-card {
        padding: 20px;
    }
}