.tool-main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}
.tool-header h1 {
    font-size: 2.5rem;
    color: #333;
}
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}
.card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}
.input-group {
    margin-bottom: 1.5rem;
}
.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #444;
}
.input-group input, .input-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
}
.w-100 {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
}
.summary-boxes {
    margin-bottom: 2rem;
}
.summary-box {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 1rem;
}
.summary-box.primary {
    background: #e0f2fe;
    border: 1px solid #bae6fd;
}
.summary-box h3, .summary-box h4 {
    margin: 0 0 0.5rem 0;
    color: #475569;
}
.amount {
    font-size: 2.5rem;
    font-weight: bold;
    color: #0369a1;
}
.sub-amount {
    font-size: 1.5rem;
    font-weight: bold;
    color: #334155;
}
.summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}
.tool-guide-link {
    text-align: center;
    margin-top: 1.5rem;
}
.tool-guide-link a {
    color: #0ea5e9;
    text-decoration: none;
    font-weight: 600;
}
.tool-guide-link a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}