:root {
    /* Kadence Theme Inspired Palette */
    --bac-primary-color: #0088cc;
    --bac-primary-hover: #0077b3;
    --bac-primary-light: #e6f3fa;
    --bac-text-dark: #333333;
    --bac-text-medium: #555555;
    --bac-text-light: #777777;
    --bac-bg-main: transparent; /* No background for the main container */
    --bac-bg-card: #ffffff;
    --bac-border-color: #e5e7eb;
    --bac-accent-amber: #f0ad4e; /* Warning/Older color */
    --bac-accent-green: #5cb85c; /* Success/Younger color */
    --bac-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
     background-color: var(--bac-bg-main);
}

#bio-age-calculator-container {
    max-width: 1290px;
    margin: 0 auto; /* Let WP handle vertical margin */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    color: var(--bac-text-dark);
    padding: 0; /* Removed container padding */
}

.bac-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 0;
}

.bac-title {
    font-size: 2.25rem; /* Slightly reduced for better embedding */
    font-weight: 600;
    color: var(--bac-text-dark);
    margin: 0;
}

.bac-subtitle {
    font-size: 1.125rem;
    color: var(--bac-text-medium);
    margin-top: 1rem;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}

.bac-main-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    padding: 0;
}

.bac-form, .bac-results {
    background-color: var(--bac-bg-card);
    padding: 2rem;
    border-radius: 8px; /* Kadence often uses more subtle curves */
    box-shadow: var(--bac-shadow);
    border: 1px solid var(--bac-border-color);
    width: 100%;
}

.bac-form-section {
    margin-bottom: 2.5rem;
}
.bac-form-section:last-child {
    margin-bottom: 0;
}

.bac-section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bac-text-dark);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--bac-border-color);
}

.bac-form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.bac-slider-group, .bac-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bac-slider-label, .bac-input-group > label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--bac-text-medium);
}
.bac-slider-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bac-primary-color);
    background-color: var(--bac-primary-light);
    padding: 0.25rem 0.5rem;
    border-radius: 0.5rem;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 0.5rem;
    background: var(--bac-border-color);
    border-radius: 0.25rem;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    background: var(--bac-primary-color);
    border-radius: 50%;
    border: 2px solid var(--bac-bg-card);
    transition: background-color 0.15s ease-in-out;
}
input[type="range"]::-moz-range-thumb {
    width: 1.25rem;
    height: 1.25rem;
    background: var(--bac-primary-color);
    border-radius: 50%;
    border: 2px solid var(--bac-bg-card);
    transition: background-color 0.15s ease-in-out;
}
input[type="range"]:active::-webkit-slider-thumb {
    background-color: var(--bac-primary-hover);
}
input[type="range"]:active::-moz-range-thumb {
    background-color: var(--bac-primary-hover);
}

.bac-bmi-display {
    font-size: 0.8rem;
    color: var(--bac-text-light);
    margin-top: 0.25rem;
}

.bac-select-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

select {
    width: 100%;
    background-color: #f7f7f7;
    border: 1px solid var(--bac-border-color);
    border-radius: 0.5rem;
    padding: 0.75rem;
    font-size: 1rem;
    transition: all 0.2s ease-in-out;
}
select:focus {
    outline: none;
    border-color: var(--bac-primary-color);
    box-shadow: 0 0 0 2px var(--bac-primary-light);
}

.bac-radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.bac-radio-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--bac-text-medium);
}
.bac-radio-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.75rem;
}
.bac-radio-options input[type="radio"] {
    display: none;
}
.bac-radio-options label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.75rem;
    border: 1px solid var(--bac-border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    min-height: 50px;
}
.bac-radio-options label:hover {
    background-color: #f7f7f7;
}
.bac-radio-options input[type="radio"]:checked + label {
    border-color: var(--bac-primary-color);
    color: var(--bac-primary-color);
    box-shadow: 0 0 0 2px var(--bac-primary-light);
}
.bac-radio-desc {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--bac-text-light);
    margin-top: 2px;
}

.bac-results-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.bac-age-display {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.bac-age-label {
    text-transform: uppercase;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--bac-text-light);
}
.bac-age-value {
    font-size: 4.5rem;
    font-weight: 700;
    color: var(--bac-primary-color);
    line-height: 1.1;
    margin: 0.5rem 0;
}
.bac-bar-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.bac-bar-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}
.bac-bar-info span:first-child {
    font-weight: 600;
    color: var(--bac-text-medium);
}
.bac-bar-value {
    font-size: 1.5rem;
    font-weight: 700;
}
.bac-bar-bio-label { color: var(--bac-primary-color) !important; }
.bac-bar-bio-value { color: var(--bac-primary-color); }
.bac-bar-track {
    height: 0.75rem;
    background-color: var(--bac-border-color);
    border-radius: 9999px;
    overflow: hidden;
}
.bac-bar-fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease-in-out;
}
.bac-bar-chrono { background-color: var(--bac-text-light); }
.bac-bar-bio { background-color: var(--bac-primary-color); }

.bac-summary {
    background-color: #f7f7f7;
    border-radius: 0.75rem;
    padding: 1rem;
    text-align: center;
    font-size: 1rem;
    color: var(--bac-text-medium);
    grid-column: 1 / -1;
}
.bac-summary strong {
    font-weight: 700;
}

.bac-results-actions {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.bac-button-primary, .bac-button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}
.bac-button-primary svg, .bac-button-secondary svg {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: 0.5rem;
}
.bac-button-primary {
    background-color: var(--bac-primary-color);
    color: white;
}
.bac-button-primary:hover {
    background-color: var(--bac-primary-hover);
}
.bac-button-secondary {
    background-color: var(--bac-bg-card);
    color: var(--bac-text-medium);
    border-color: var(--bac-border-color);
}
.bac-button-secondary:hover {
    background-color: #f7f7f7;
}
.bac-button-primary:disabled, .bac-button-secondary:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

@media (min-width: 768px) {
    .bac-form-grid { grid-template-columns: 1fr 1fr; }
    .bac-form-grid.bac-radio-sections { grid-template-columns: 1fr; }
    .bac-radio-options { grid-template-columns: repeat(4, 1fr); }
    .bac-results-content { 
        display: grid;
        grid-template-columns: 1fr 1.5fr;
        align-items: center;
        gap: 3rem;
    }
}

#print-section {
    display: none;
}

@media print {
    body * {
        visibility: hidden;
    }
    #print-section, #print-section * {
        visibility: visible;
    }
    #print-section {
        display: block;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        box-shadow: none;
        border: none;
        padding: 1rem;
    }
    .bac-results-actions {
        display: none !important;
    }
    .bac-results {
        box-shadow: none;
        border: 1px solid var(--bac-border-color);
    }
}