body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 20px;
    background-color: #f0f0f0;
    color: #333;
}

.container {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 1000px;
    margin-bottom: 20px;
}

.logo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.logo-placeholder img {
    max-height: 50px;
    max-width: 150px;
}

h1 {
    text-align: center;
    margin-top: 0;
    color: #2c3e50;
    font-size: 2.5rem;
}

h2 {
    text-align: center;
    margin-top: 0;
}

.subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-bottom: 2rem;
}

/* Calculator Grid Styles */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.calculator-card {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.calculator-card:not(.coming-soon):hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.calculator-card.coming-soon {
    opacity: 0.7;
    background: #f1f3f4;
}

.calculator-card h3 {
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 1rem;
}

.calculator-card p {
    color: #666;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.calculator-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.feature-tag {
    background: #007acc;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.coming-soon .feature-tag {
    background: #95a5a6;
}

.calculator-button {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: #007acc;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.calculator-button:hover {
    background-color: #005a9e;
}

.calculator-button.disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

.calculator-button.disabled:hover {
    background-color: #95a5a6;
}

.page-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    color: #666;
    font-size: 0.9rem;
}

.page-footer a {
    color: #007acc;
    text-decoration: none;
}

.page-footer a:hover {
    text-decoration: underline;
}

fieldset {
    border: 1px solid #ccc;
    padding: 15px;
    border-radius: 5px;
}

legend {
    font-weight: bold;
    padding: 0 10px;
}

.param-row, .input-group {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.param-control {
    flex: 0 0 280px;
    display: flex;
    align-items: center;
}

.param-control label {
    margin-left: 5px;
}

.param-inputs {
    flex: 1;
}

.range-inputs {
    display: none;
    align-items: center;
    gap: 10px;
}

.range-inputs label {
    font-size: 0.9em;
}

input[type="number"] {
    width: 100%;
    box-sizing: border-box;
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.range-inputs input {
    width: 70px;
}

.input-group label {
    flex-basis: 280px;
}

button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 1rem;
    border: none;
    background-color: #007bff;
    color: #fff;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3;
}

#result {
    margin-top: 1.5rem;
    font-weight: normal;
    line-height: 1.7;
    background-color: #e9f5ff;
    padding: 1rem;
    border-radius: 5px;
    border-left: 5px solid #007bff;
}

#result h4 {
    margin-top: 0;
    margin-bottom: 10px;
}

#result strong {
    font-weight: bold;
}

.plot-container {
    width: 100%;
    max-width: 900px;
    height: 700px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#chartContainer {
    height: 500px;
}