/* ====================================
   Calculator Specific Styles
   Mobile-First Approach
   ==================================== */

/* ====================================
   Calculator Hero Section
   ==================================== */
.calc-hero {
    padding: calc(60px + var(--spacing-2xl)) var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--gray);
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.calc-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}

.calc-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    margin-bottom: var(--spacing-xl);
}

.calc-stats {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.calc-stats .stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray);
    font-size: 0.875rem;
}

.calc-stats .stat i {
    color: var(--primary);
}

/* ====================================
   Calculator Layout
   ==================================== */
.calc-main {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.calc-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.calc-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.calc-form-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: var(--spacing-xl);
}

/* ====================================
   Calculator Form
   ==================================== */
.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Unit Toggle */
.unit-toggle {
    display: flex;
    background: var(--light);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.unit-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.unit-btn.active {
    background: var(--white);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* Form Rows */
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark);
}

.form-group label i {
    color: var(--primary);
    width: 16px;
}

.form-group input[type="number"] {
    padding: var(--spacing-md);
    border: 2px solid var(--light);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-help {
    font-size: 0.75rem;
    color: var(--gray);
}

/* Radio Group */
.radio-group {
    display: flex;
    gap: var(--spacing-md);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.radio-label:has(input:checked) {
    background: var(--primary);
    color: var(--white);
}

.radio-label input[type="radio"] {
    width: 16px;
    height: 16px;
}

/* Height Inputs */
.height-inputs {
    display: flex;
    gap: var(--spacing-sm);
}

.height-inputs input {
    flex: 1;
}

/* Calculate Button */
.btn-calculate {
    margin-top: var(--spacing-md);
}

/* ====================================
   Results Section
   ==================================== */
.results-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

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

.results-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: var(--spacing-xl);
}

/* Primary Result */
.result-primary {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.result-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.result-value {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.result-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
}

/* BMI Scale Visual */
.bmi-scale {
    margin-bottom: var(--spacing-xl);
}

.scale-labels,
.scale-values {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--gray);
}

.scale-labels {
    margin-bottom: var(--spacing-sm);
}

.scale-bar {
    position: relative;
    height: 30px;
    display: flex;
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.scale-segment {
    flex: 1;
}

.scale-segment.underweight {
    background: #3b82f6;
}

.scale-segment.normal {
    background: #10b981;
}

.scale-segment.overweight {
    background: #f59e0b;
}

.scale-segment.obese {
    background: #ef4444;
}

.scale-indicator {
    position: absolute;
    top: -5px;
    width: 4px;
    height: 40px;
    background: var(--dark);
    border-radius: var(--radius-full);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-md);
}

.scale-indicator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--dark);
    border-radius: 50%;
}

/* Result Breakdown */
.result-breakdown {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--light);
    border-radius: var(--radius-md);
}

.item-label {
    font-size: 0.875rem;
    color: var(--gray);
}

.item-value {
    font-weight: 600;
    color: var(--dark);
}

/* Health Risk Section */
.health-risk-section {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.health-risk-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--dark);
}

.risk-level {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.risk-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: currentColor;
}

.risk-level.low {
    color: var(--success);
}

.risk-level.moderate {
    color: var(--warning);
}

.risk-level.high,
.risk-level.very-high {
    color: var(--danger);
}

.risk-level.extreme {
    color: #991b1b;
}

.risk-text {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
}

.risk-description {
    color: var(--dark);
    line-height: 1.6;
}

/* Result Actions */
.result-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

/* ====================================
   Email Modal
   ==================================== */
.email-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.email-modal.show {
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    background: var(--light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--primary);
    color: var(--white);
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--dark);
}

.modal-benefits {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.modal-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--gray);
}

.modal-benefits i {
    color: var(--success);
}

.email-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.email-form input[type="email"] {
    padding: var(--spacing-md);
    border: 2px solid var(--light);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.privacy-note {
    font-size: 0.75rem;
    color: var(--gray);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

/* ====================================
   Related Calculators
   ==================================== */
.related-calculators {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--light);
    border-radius: var(--radius-lg);
}

.related-calculators h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--dark);
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.related-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--dark);
    transition: all var(--transition-fast);
}

.related-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.related-item i {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

/* ====================================
   Content Section
   ==================================== */
.calc-content {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.toc-sidebar {
    display: none;
}

.toc-card {
    background: var(--light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    position: sticky;
    top: 80px;
}

.toc-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--dark);
}

.toc-list {
    list-style: none;
}

.toc-list li {
    padding: var(--spacing-sm) 0;
}

.toc-list a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.toc-list a:hover {
    color: var(--primary);
}

.main-content h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--dark);
}

.main-content p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

/* Product Recommendations */
.product-recommendations {
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: var(--light);
    border-radius: var(--radius-lg);
}

.product-recommendations h2 {
    margin-bottom: var(--spacing-md);
}

.affiliate-disclosure {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--warning) 
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
    font-size: 0.875rem;
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

/* ====================================
   Animations
   ==================================== */
.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   Notifications
   ==================================== */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: var(--primary);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    transform: translateX(400px);
    transition: transform var(--transition-base);
    max-width: 350px;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    background: var(--success);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ====================================
   Tablet Styles (768px+)
   ==================================== */
@media (min-width: 768px) {
    .calc-hero {
        padding: calc(60px + var(--spacing-3xl)) var(--spacing-xl) var(--spacing-2xl);
    }
    
    .calc-title {
        font-size: 2.5rem;
    }
    
    .calc-layout {
        grid-template-columns: 1fr 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .result-breakdown {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .result-actions {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .related-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ====================================
   Desktop Styles (1024px+)
   ==================================== */
@media (min-width: 1024px) {
    .calc-layout {
        grid-template-columns: 2fr 3fr;
    }
    
    .content-wrapper {
        grid-template-columns: 250px 1fr;
    }
    
    .toc-sidebar {
        display: block;
    }
    
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ====================================
   Wide Desktop (1280px+)
   ==================================== */
@media (min-width: 1280px) {
    .calc-title {
        font-size: 3rem;
    }
    
    .product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}