body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #00416A, #E4E5E6);
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.calculator {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.calculator:hover {
    transform: translateY(-5px);
}

h1 {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #2c3e50;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
    margin-bottom: 10px;
}

select {
    background-color: white;
}

input:focus, select:focus {
    border-color: #00416A;
    outline: none;
}

button {
    width: 100%;
    padding: 12px;
    background: #00416A;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 15px;
}

button:hover {
    background: #002d4a;
}

.results {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    overflow-x: auto;
}

.chart-container {
    grid-column: 1 / span 2;
    background: white;
    padding: 20px;
    border-radius: 15px;
    margin-top: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    font-size: 14px;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid #ddd;
    white-space: nowrap;
}

th {
    background-color: #00416A;
    color: white;
}

tr:nth-child(even) {
    background-color: #f5f5f5;
}

@media (max-width: 1200px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        grid-column: 1;
    }
}