/* CSS Variables for easy theming */
:root {
    --bcc-primary-color: #007A73; /* A calming, professional teal */
    --bcc-secondary-color: #4A90E2; /* A friendly blue for highlights */
    --bcc-accent-color: #F5A623; /* A warm orange for callouts */
    --bcc-bg-color: #f8f9fa;
    --bcc-card-bg-color: #ffffff;
    --bcc-text-color: #333;
    --bcc-light-text-color: #666;
    --bcc-border-color: #e9ecef;
    --bcc-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    --bcc-font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

#braces-cost-calculator-app {
    all: unset; /* Reset styles to avoid theme conflicts */
    font-family: var(--bcc-font);
    background-color: var(--bcc-bg-color);
    color: var(--bcc-text-color);
    padding: 2rem 1rem;
    max-width: 900px;
    margin: 2rem auto;
    border-radius: 12px;
    box-shadow: var(--bcc-shadow);
    border: 1px solid var(--bcc-border-color);
    overflow: hidden;
}

.bcc-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.bcc-header h2 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    color: var(--bcc-primary-color);
    margin: 0 0 0.5rem 0;
    font-weight: 700;
}

.bcc-header p {
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    color: var(--bcc-light-text-color);
    margin: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.bcc-main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 800px) {
    .bcc-main-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.bcc-card {
    background-color: var(--bcc-card-bg-color);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.bcc-input-group {
    margin-bottom: 1.75rem;
}

.bcc-input-group:last-child {
    margin-bottom: 0;
}

.bcc-input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--bcc-primary-color);
}

.bcc-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.75rem;
}

.bcc-options-grid input[type="radio"] {
    display: none;
}

.bcc-options-grid label {
    display: block;
    padding: 0.75rem;
    border: 2px solid var(--bcc-border-color);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--bcc-light-text-color);
}

.bcc-options-grid input[type="radio"]:checked + label {
    background-color: var(--bcc-primary-color);
    color: white;
    border-color: var(--bcc-primary-color);
    box-shadow: 0 2px 5px rgba(0, 122, 115, 0.3);
    transform: translateY(-2px);
}

.bcc-slider-group {
    position: relative;
}

.bcc-slider-output {
    font-weight: 700;
    color: var(--bcc-secondary-color);
    font-size: 1.2rem;
}

input[type="range"].bcc-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: var(--bcc-border-color);
    border-radius: 5px;
    outline: none;
    margin-top: 0.5rem;
    cursor: pointer;
}

input[type="range"].bcc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    background: var(--bcc-secondary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: background-color 0.2s;
}

input[type="range"].bcc-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: var(--bcc-secondary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: background-color 0.2s;
}

.bcc-results-card h3 {
    font-size: 1.4rem;
    color: var(--bcc-primary-color);
    border-bottom: 2px solid var(--bcc-border-color);
    padding-bottom: 0.75rem;
    margin: -1.5rem -1.5rem 1.5rem -1.5rem;
    padding-left: 1.5rem;
}

.bcc-total-cost-display {
    background-color: var(--bcc-primary-color);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 1.5rem;
}

.bcc-total-cost-display .bcc-label {
    font-size: 1rem;
    opacity: 0.9;
    display: block;
}

.bcc-total-cost-display .bcc-amount {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.1;
}

.bcc-results-breakdown ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bcc-results-breakdown li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--bcc-border-color);
    font-size: 0.95rem;
}

.bcc-results-breakdown li:last-child {
    border-bottom: none;
}

.bcc-results-breakdown li span:first-child {
    color: var(--bcc-light-text-color);
}

.bcc-results-breakdown li span:last-child {
    font-weight: 600;
    color: var(--bcc-text-color);
}

.bcc-monthly-payment {
    font-weight: 700 !important;
    font-size: 1.1rem;
    color: var(--bcc-secondary-color) !important;
}

.bcc-interest-free-box {
    background-color: #e8f5e9; /* Light green */
    border: 1px solid #a5d6a7;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1.5rem;
    text-align: center;
}

.bcc-interest-free-box h4 {
    margin: 0 0 0.5rem 0;
    color: #2e7d32; /* Darker green */
    font-size: 1.1rem;
}

.bcc-interest-free-box p {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1b5e20;
}