/* --- Body Metrics Calculator Styles --- */
:root {
    --whtr-primary-color: #0073aa; 
    --whtr-secondary-color: #d54e21;
    --whtr-text-color: #333333;
    --whtr-background-color: #ffffff;
    --whtr-border-color: #dddddd;
    --whtr-light-bg-color: #f7f7f7;
    --whtr-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --whtr-cat-underweight: #3498db;
    --whtr-cat-healthy: #2ecc71;
    --whtr-cat-overweight: #f1c40f;
    --whtr-cat-obese: #e74c3c;
    --whtr-error-color: #dc3232;
}

/* --- Main Container --- */
.whtr-calculator-container {
    font-family: var(--whtr-font-family); color: var(--whtr-text-color); background-color: var(--whtr-background-color);
    border: 1px solid var(--whtr-border-color); border-radius: 8px; padding: 25px;
    max-width: 1290px; margin: 2rem auto; display: grid; grid-template-columns: 1fr 1fr;
    gap: 40px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

/* --- Input Section --- */
.whtr-inputs-section { display: flex; flex-direction: column; gap: 15px; }
.whtr-input-group { display: flex; flex-direction: column; gap: 8px; }
.whtr-input-group label { font-weight: 600; font-size: 1rem; }
.whtr-input-group input[type="number"] {
    width: 100%; padding: 12px; border: 1px solid var(--whtr-border-color); border-radius: 4px; font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.whtr-input-group input[type="number"]:focus {
    outline: none; border-color: var(--whtr-primary-color); box-shadow: 0 0 0 2px rgba(0, 115, 170, 0.2);
}
.whtr-compound-input { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.whtr-input-group input[type="radio"] { display: none; }
.whtr-input-group input[type="radio"] + label {
    flex-grow: 1; text-align: center; padding: 10px 15px; border: 1px solid var(--whtr-border-color);
    border-radius: 4px; cursor: pointer; transition: background-color 0.3s, color 0.3s;
}
.whtr-input-group input[type="radio"]:checked + label {
    background-color: var(--whtr-primary-color); color: white; border-color: var(--whtr-primary-color);
}
.whtr-unit-switcher div, .whtr-input-group > div:not(.whtr-compound-input) { display: flex; gap: 10px; align-items: center; }
.whtr-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.whtr-btn {
    padding: 12px 20px; font-size: 1rem; font-weight: 600; border: none;
    border-radius: 4px; cursor: pointer; transition: all 0.3s;
}
.whtr-btn:hover { opacity: 0.85; }
.whtr-btn-primary { background-color: var(--whtr-primary-color); color: white; }
.whtr-btn-secondary { background-color: #6c757d; color: white; }
.whtr-error-message {
    color: var(--whtr-error-color); font-size: 0.875rem; min-height: 1.2em;
}
.whtr-input-group input.whtr-input-error { border-color: var(--whtr-error-color); }

/* --- Results Section --- */
.whtr-results-section {
    background-color: var(--whtr-light-bg-color); border-radius: 8px; padding: 30px;
    display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
}
.whtr-placeholder p { color: #777; font-size: 1.1rem; }
.whtr-results-tabs {
    display: flex; border-bottom: 1px solid var(--whtr-border-color); margin-bottom: 20px;
}
.whtr-tab-link {
    padding: 10px 20px; border: none; background-color: transparent; cursor: pointer;
    font-size: 1rem; color: #555; position: relative;
    border-bottom: 3px solid transparent; transition: all 0.3s;
}
.whtr-tab-link.active { 
    color: var(--whtr-primary-color); 
    font-weight: 700;
    border-bottom-color: var(--whtr-primary-color); 
}
.whtr-tab-content { display: none; }
.whtr-tab-content.active { display: block; animation: fadeIn 0.5s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.whtr-tab-content h3 { margin-top: 0; margin-bottom: 20px; font-size: 1.2rem; }

/* Result Visuals */
.whtr-simple-result { padding-top: 30px; }
.whtr-gauge { width: 200px; height: 100px; position: relative; margin: 0 auto 15px; }
.whtr-gauge-body { width: 200px; height: 100px; position: absolute; top: 0; left: 0; overflow: hidden; }
.whtr-gauge-fill {
    width: 200px; height: 200px; position: absolute; top: 0; left: 0; border-radius: 50%;
    background: conic-gradient(from -90deg, var(--whtr-cat-healthy) 0 98deg, var(--whtr-cat-overweight) 98deg 118deg, var(--whtr-cat-obese) 118deg 180deg);
}
.whtr-gauge-cover {
    width: 150px; height: 150px; background: var(--whtr-light-bg-color); border-radius: 50%;
    position: absolute; top: 50px; left: 25px;
}
.whtr-gauge-needle {
    width: 2px; height: 95px; background: var(--whtr-text-color); position: absolute; bottom: 5px;
    left: 50%; transform-origin: bottom center; transition: transform 0.5s ease-in-out;
    transform: translateX(-50%) rotate(0deg);
}
.whtr-result-value { font-size: 3rem; font-weight: 700; line-height: 1.1; color: var(--whtr-primary-color); }
.whtr-result-category { font-size: 1.5rem; font-weight: 600; margin-top: 5px; margin-bottom: 15px; transition: color 0.3s; }
.whtr-result-message { font-size: 1rem; line-height: 1.6; max-width: 400px; margin: 0 auto; }

/* --- Chart Container --- */
.whtr-chart-container {
    max-width: 1290px; margin: 2rem auto; padding: 25px; border: 1px solid var(--whtr-border-color); border-radius: 8px;
}
.whtr-chart-table { width: 100%; border-collapse: collapse; margin-top: 15px; }
.whtr-chart-table th, .whtr-chart-table td {
    padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--whtr-border-color);
}
.whtr-chart-table thead th { background-color: var(--whtr-light-bg-color); }
.whtr-chart-table .metric-header {
    font-weight: 700; background-color: var(--whtr-light-bg-color); vertical-align: middle; text-align: center;
}
.whtr-disclaimer { margin-top: 20px; font-size: 0.9rem; color: #666; text-align: center; }

/* --- Responsive Layout --- */
@media (max-width: 900px) { .whtr-calculator-container { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
    .whtr-calculator-container, .whtr-chart-container { padding: 15px; }
    .whtr-compound-input, .whtr-buttons { grid-template-columns: 1fr; }
    .whtr-results-tabs { width: 100%; justify-content: space-around; }
    .whtr-tab-link { padding: 10px 5px; font-size: 0.9rem; }
}

/* --- Smart Print Styles --- */
@media print {
    body * { visibility: hidden; }
    #whtr-printable-results, #whtr-printable-results *,
    #whtr-printable-chart, #whtr-printable-chart * { visibility: visible; }
    #whtr-calculator { display: block !important; position: static; box-shadow: none; border: none; }
    .whtr-inputs-section { display: none !important; }
    .whtr-results-section { background: none; padding: 0; }
    .whtr-gauge-cover { background: white !important; }
    .whtr-disclaimer { display: none; }
}