/**
 * Enhanced BMI Calculator Styles
 * Incorporates design patterns and best practices from fitness-calculator
 */

:root {
    /* Primary Color Scheme - Based on fitness-calculator patterns */
    --bmi-primary: #3952ff;
    --bmi-secondary: #f2f8fd;
    --bmi-white: #ffffff;
    --bmi-dark: #161f37;
    --bmi-dark-text: #95a1b8;
    --bmi-light: #f8fafc;
    
    /* Status Colors */
    --bmi-success: #2ecc71;
    --bmi-warning: #f39c12;
    --bmi-danger: #e74c3c;
    --bmi-info: #3498db;
    
    /* BMI Category Colors */
    --bmi-underweight: #3498db;
    --bmi-normal: #2ecc71;
    --bmi-overweight: #f39c12;
    --bmi-obese: #e74c3c;
    
    /* UI Colors */
    --bmi-border-color: #c0d1e4;
    --bmi-global-color: #7d889c;
    --bmi-title-color: #202d51;
    --bmi-box-bg: #f9f9f9;
    --bmi-input-color: #7d889c;
    --bmi-input-bg: #ffffff;
    --bmi-placeholder: #7e7e7e;
    
    /* Effects */
    --bmi-shadow: 0 30px 30px rgb(32 45 81 / 10%);
    --bmi-transition: all .3s;
    --bmi-radius: 8px;
    
    /* Typography */
    --bmi-font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Enhanced BMI Calculator Container */
.enhanced-bmi-calculator {
    font-family: var(--bmi-font-family);
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--bmi-white);
    border-radius: var(--bmi-radius);
    box-shadow: var(--bmi-shadow);
}

.enhanced-bmi-calculator * {
    box-sizing: border-box;
}

/* Form Styling - Following fitness-calculator patterns */
.bmi-form-container {
    background: var(--bmi-box-bg);
    padding: 2rem;
    border-radius: var(--bmi-radius);
    margin-bottom: 2rem;
}

.bmi-form-title {
    color: var(--bmi-title-color);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.bmi-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.bmi-form-group {
    display: flex;
    flex-direction: column;
}

.bmi-form-label {
    color: var(--bmi-title-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.bmi-form-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--bmi-border-color);
    border-radius: var(--bmi-radius);
    background: var(--bmi-input-bg);
    color: var(--bmi-input-color);
    font-size: 1rem;
    transition: var(--bmi-transition);
}

.bmi-form-input:focus {
    outline: none;
    border-color: var(--bmi-primary);
    box-shadow: 0 0 0 3px rgba(57, 82, 255, 0.1);
}

.bmi-form-input::placeholder {
    color: var(--bmi-placeholder);
}

/* Radio Button Groups */
.bmi-radio-group {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.bmi-radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.bmi-radio-option input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--bmi-primary);
}

.bmi-radio-option label {
    color: var(--bmi-global-color);
    cursor: pointer;
    margin: 0;
}

/* Unit Selection */
.bmi-unit-selector {
    display: flex;
    background: var(--bmi-white);
    border: 1px solid var(--bmi-border-color);
    border-radius: var(--bmi-radius);
    overflow: hidden;
    margin-top: 0.5rem;
}

.bmi-unit-option {
    flex: 1;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: var(--bmi-transition);
    color: var(--bmi-global-color);
}

.bmi-unit-option.active {
    background: var(--bmi-primary);
    color: var(--bmi-white);
}

.bmi-unit-option:hover:not(.active) {
    background: var(--bmi-secondary);
}

/* Calculate Button */
.bmi-calculate-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--bmi-primary);
    color: var(--bmi-white);
    border: none;
    border-radius: var(--bmi-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--bmi-transition);
    margin-top: 1rem;
}

.bmi-calculate-btn:hover {
    background: #2d42d4;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(57, 82, 255, 0.3);
}

.bmi-calculate-btn:active {
    transform: translateY(0);
}

.bmi-calculate-btn:disabled {
    background: var(--bmi-border-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Enhanced Results Section */
.bmi-results-section {
    background: var(--bmi-white);
    border-radius: var(--bmi-radius);
    box-shadow: var(--bmi-shadow);
    padding: 2rem;
    margin-top: 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.bmi-results-section.show {
    opacity: 1;
    transform: translateY(0);
}

.bmi-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bmi-border-color);
}

.bmi-results-title {
    color: var(--bmi-title-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

/* BMI Speedometer Enhancement */
.bmi-speedometer-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 2rem 0;
}

.bmi-speedometer {
    position: relative;
    width: 300px;
    height: 150px;
    margin-bottom: 1rem;
}

.bmi-speedometer-bg {
    width: 100%;
    height: 100%;
}

.bmi-needle-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 80px;
    transform-origin: bottom center;
    transition: transform 1s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
}

.bmi-needle {
    width: 100%;
    height: 100%;
    background: var(--bmi-primary);
    border-radius: 2px;
    position: relative;
}

.bmi-needle::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--bmi-primary);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(57, 82, 255, 0.3);
}

/* BMI Value Display */
.bmi-value-display {
    text-align: center;
    background: var(--bmi-box-bg);
    padding: 2rem;
    border-radius: var(--bmi-radius);
    margin: 1rem 0;
}

.bmi-value-number {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.bmi-value {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--bmi-primary);
    line-height: 1;
    transition: var(--bmi-transition);
}

.bmi-unit {
    font-size: 1.2rem;
    color: var(--bmi-dark);
    font-weight: 500;
}

.bmi-category {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-block;
    transition: var(--bmi-transition);
}

.bmi-category.underweight {
    background: rgba(52, 152, 219, 0.1);
    color: var(--bmi-info);
}

.bmi-category.normal {
    background: rgba(46, 204, 113, 0.1);
    color: var(--bmi-success);
}

.bmi-category.overweight {
    background: rgba(243, 156, 18, 0.1);
    color: var(--bmi-warning);
}

.bmi-category.obese {
    background: rgba(231, 76, 60, 0.1);
    color: var(--bmi-danger);
}

.bmi-description {
    color: var(--bmi-global-color);
    font-size: 1rem;
    line-height: 1.5;
    max-width: 400px;
    margin: 0 auto;
}

/* Enhanced Results Table */
.bmi-results-table-container {
    margin-top: 2rem;
    border-radius: var(--bmi-radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.bmi-results-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bmi-white);
    font-size: 0.95rem;
}

.bmi-results-table th {
    background: var(--bmi-primary);
    color: var(--bmi-white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.bmi-results-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--bmi-border-color);
    color: var(--bmi-global-color);
}

.bmi-results-table tbody tr:hover {
    background: var(--bmi-box-bg);
}

.bmi-results-table tbody tr:last-child td {
    border-bottom: none;
}

/* Action Buttons */
.bmi-action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.bmi-action-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--bmi-primary);
    border-radius: var(--bmi-radius);
    background: transparent;
    color: var(--bmi-primary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--bmi-transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.bmi-action-btn:hover {
    background: var(--bmi-primary);
    color: var(--bmi-white);
    transform: translateY(-2px);
}

.bmi-action-btn.primary {
    background: var(--bmi-primary);
    color: var(--bmi-white);
}

.bmi-action-btn.primary:hover {
    background: #2d42d4;
}

/* Social Share Buttons */
.bmi-social-share {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1rem;
}

.bmi-share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--bmi-border-color);
    background: var(--bmi-white);
    color: var(--bmi-global-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--bmi-transition);
}

.bmi-share-btn:hover {
    background: var(--bmi-primary);
    color: var(--bmi-white);
    transform: translateY(-2px);
    border-color: var(--bmi-primary);
}

/* Loading States */
.bmi-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--bmi-border-color);
    border-radius: 50%;
    border-top-color: var(--bmi-primary);
    animation: bmi-spin 1s ease-in-out infinite;
}

@keyframes bmi-spin {
    to { transform: rotate(360deg); }
}

/* Error States */
.bmi-error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--bmi-danger);
    padding: 1rem;
    border-radius: var(--bmi-radius);
    border-left: 4px solid var(--bmi-danger);
    margin: 1rem 0;
}

.bmi-form-input.error {
    border-color: var(--bmi-danger);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* Success States */
.bmi-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--bmi-success);
    padding: 1rem;
    border-radius: var(--bmi-radius);
    border-left: 4px solid var(--bmi-success);
    margin: 1rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .enhanced-bmi-calculator {
        padding: 1rem;
        margin: 1rem;
    }
    
    .bmi-form-container {
        padding: 1.5rem;
    }
    
    .bmi-form-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .bmi-results-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .bmi-speedometer {
        width: 250px;
        height: 125px;
    }
    
    .bmi-value {
        font-size: 2.5rem;
    }
    
    .bmi-action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .bmi-action-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .enhanced-bmi-calculator {
        padding: 0.5rem;
    }
    
    .bmi-form-container {
        padding: 1rem;
    }
    
    .bmi-results-section {
        padding: 1rem;
    }
    
    .bmi-speedometer {
        width: 200px;
        height: 100px;
    }
    
    .bmi-value {
        font-size: 2rem;
    }
    
    .bmi-results-table th,
    .bmi-results-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
}

/* Print Styles */
@media print {
    .enhanced-bmi-calculator {
        box-shadow: none;
        border: 1px solid var(--bmi-border-color);
    }
    
    .bmi-action-buttons,
    .bmi-social-share {
        display: none;
    }
    
    .bmi-results-section {
        box-shadow: none;
        border: 1px solid var(--bmi-border-color);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bmi-white: #1a1a1a;
        --bmi-dark: #ffffff;
        --bmi-box-bg: #2d2d2d;
        --bmi-input-bg: #2d2d2d;
        --bmi-border-color: #404040;
        --bmi-global-color: #b0b0b0;
        --bmi-title-color: #ffffff;
        --bmi-dark-text: #b0b0b0;
    }
}

/* Accessibility Enhancements */
.bmi-form-input:focus,
.bmi-calculate-btn:focus,
.bmi-action-btn:focus,
.bmi-share-btn:focus {
    outline: 2px solid var(--bmi-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .bmi-needle-container {
        transition: none;
    }
    
    .bmi-results-section {
        transition: none;
        opacity: 1;
        transform: none;
    }
}