:root {
    --yale-blue: #00356B;
    --yale-white: #ffffff;
}

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: #333;
}

.calculation-section {
    margin-bottom: 64px;
}

/* If you also want margin after the download section */
#download {
    margin-bottom: 32px;
}

.navbar {
    background-color: var(--yale-blue);
    padding: 1rem 0;
}

.yale-header {
    width: 100%;
}

.yale-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.yale-logo {
    height: 60px;
    width: auto;
}

.yale-text {
    display: flex;
    flex-direction: column;
}

.yale-school {
    color: var(--yale-white);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.2;
}

.yale-center {
    color: var(--yale-white);
    font-size: 1.25rem;
    line-height: 1.2;
}

.main-title {
    color: var(--yale-blue);
    font-family: 'Merriweather', serif;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 2rem 0 3rem 0;
    text-align: left;
    max-width: 800px;
    line-height: 1.2;
}

.section-subtitle {
    color: #000;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
}

.section-divider {
    border-top: 2px solid #000;
    margin: 1rem 0;
}

.collapsible-section {
    margin-bottom: 1rem;
}

.collapsible-header {
    background-color: transparent;
    color: #000;
    padding: 1rem;
    cursor: pointer;
    border-bottom: 1px solid #ddd;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
}

.collapsible-header::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: bold;
}

.collapsible-header:hover {
    background-color: #f8f9fa;
}

.collapsible-content {
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 0 0 4px 4px;
    display: none;
}

.download-button {
    background-color: var(--yale-blue);
    color: var(--yale-white);
    padding: 10px 20px;
    line-height: 1.5;
    height: auto;
    min-height: 50px;
    margin-bottom: 5px;
    border: none;
    border-radius: 4px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.download-button:hover {
    background-color: #004c99;
}

.download-btn-orange {
    background-color: #FF8300;  /* Orange color */
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    margin: 10px 0;
}

.download-btn-orange:hover {
    background-color: #E67300;  /* Darker orange for hover effect */
}

.index-selector {
    margin: 1.5rem 0 1rem 0;
    max-width: 600px;
}

.form-select {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    background-color: #fff;
}

.plot-title {
    color: var(--yale-blue);
    margin: 1rem 0 0.5rem 0;
    font-size: 1.5rem;
    font-weight: 500;
}

.plot-container {
    margin: 0.5rem 0;
    min-height: 600px;
}

.chart-controls {
    margin: 0.5rem 0 1rem 0;
    text-align: center;
}

.chart-controls .btn {
    background-color: transparent;
    border: 1px solid #6c757d;
    color: #6c757d;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    white-space: nowrap;
}

.chart-controls .btn:hover {
    background-color: #6c757d;
    color: white;
}

.chart-controls .btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(108, 117, 125, 0.25);
}

.calculation-section {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .plot-container {
        min-height: 300px;
    }
}

.button-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    align-items: center;
    margin-top: 20px;
}

/* Make sure buttons have consistent height */
.download-button,
.download-btn-orange {
    height: 40px;  /* or whatever height matches your design */
}