/* Precision Unit Converter Page - Site-Consistent Professional Styling */
/* Enhanced user experience with consistent blue design theme matching site-wide standards */

:root {
    /* Site-Wide Blue Color System (Matching main.css) */
    --primary-blue: #007AFF;
    --secondary-blue: #5AC8FA;
    --accent-blue: #0056CC;
    --light-blue: #E3F2FD;
    --dark-blue: #1565C0;
    
    /* Neutral Supporting Colors */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E0E0E0;
    --gray-300: #BDBDBD;
    --gray-500: #757575;
    --gray-700: #424242;
    --gray-900: #212121;
    
    /* System Colors */
    --background-white: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
    
    /* Spacing (8px grid) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Borders & Shadows */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-color: var(--gray-200);
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-smooth: 0.3s ease-in-out;
    
    /* Icon Colors (Site Standard) */
    --icon-primary: var(--primary-blue);
    --icon-secondary: var(--gray-500);
    --icon-converter: var(--secondary-blue);
    --icon-precision: #9C27B0;
    --icon-success: var(--success-color);
    --icon-warning: var(--warning-color);
}

/* Base Layout Override for Page Consistency */
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-white);
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 400;
}

/* Main Container */
.calculator-page {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 32px;
}

.container {
    max-width: 100%;
}

/* Site-Consistent Calculator Header */
.calculator-header {
    background: var(--gray-50);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl) var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
    text-align: left;
}

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

.calculator-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.calculator-icon i {
    color: white;
    background: var(--primary-blue);
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-fast);
}

.calculator-icon:hover i {
    background: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.header-text {
    flex: 1;
}

.calculator-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.header-text p {
    font-size: 1rem;
    margin: 0 0 var(--spacing-lg) 0;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 600px;
}

.calculator-badges {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.badge.primary {
    background: var(--success-color);
    color: white;
}

.badge.secondary {
    background: var(--warning-color);
    color: white;
}

.badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

/* Conversion Categories Styling */
.conversion-categories {
    margin-bottom: var(--spacing-xxl);
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-md);
}

.tab-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    background: var(--background-white);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab-button:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.tab-button.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

.tab-button i {
    font-size: 1rem;
}

/* Conversion Panels */
.conversion-panel {
    display: none;
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) var(--border-radius-lg);
    box-shadow: var(--shadow-light);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.conversion-panel.active {
    display: block;
}

.conversion-panel h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xl) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.conversion-panel h3 i {
    color: var(--primary-blue);
}

/* Conversion Grid Layout */
.conversion-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-xl);
    align-items: end;
}

.input-section,
.results-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.conversion-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.5rem;
    padding: var(--spacing-md);
}

/* Form Elements */
.input-group,
.result-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label,
.result-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.input-group input,
.input-group select {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    background: var(--background-white);
    transition: all var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* Result Display */
.result-display {
    background: var(--light-blue);
    border: 2px solid var(--primary-blue);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

.result-unit {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Precision Information */
.precision-info {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.precision-info i {
    color: var(--icon-precision);
}

/* Quick Conversions Table */
.quick-conversions {
    margin: var(--spacing-xxl) 0;
}

.quick-conversions h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.quick-conversions h3 i {
    color: var(--primary-blue);
}

.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-light);
}

#quickConversionTable {
    width: 100%;
    border-collapse: collapse;
    background: var(--background-white);
    font-size: 0.9rem;
}

#quickConversionTable th {
    background: var(--primary-blue);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
}

#quickConversionTable td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

#quickConversionTable tbody tr:hover {
    background: var(--gray-50);
}

/* Precision Information Section */
.precision-info-section {
    margin: var(--spacing-xxl) 0;
}

.precision-info-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.precision-info-section h3 i {
    color: var(--primary-blue);
}

.precision-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.precision-card {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-fast);
    display: flex;
    gap: var(--spacing-lg);
}

.precision-card:hover {
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-blue);
}

.precision-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--light-blue);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.precision-icon i {
    color: var(--primary-blue);
    font-size: 1.5rem;
}

.precision-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm) 0;
}

.precision-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.5;
}

/* Educational Content */
.educational-content {
    margin: var(--spacing-xxl) 0;
}

.educational-content h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.content-card {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-fast);
}

.content-card:hover {
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-blue);
}

.content-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.content-card h3 i {
    color: var(--primary-blue);
}

.content-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.content-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* FAQ Section Styling */
.faq-section {
    margin: var(--spacing-xxl) 0;
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl);
}

.faq-section h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.faq-section h2 i {
    color: var(--primary-blue);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-fast);
    overflow: hidden;
}

.faq-item:hover {
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-blue);
}

.faq-item.active {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-medium);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: left;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
}

.faq-question:focus {
    outline: none;
    background: var(--light-blue);
    color: var(--primary-blue);
}

.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--success-color);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-smooth);
    background: var(--gray-50);
}

.faq-item.active .faq-answer {
    max-height: 1000px;
    padding: 0 var(--spacing-xl) var(--spacing-xl) var(--spacing-xl);
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.faq-answer ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.faq-answer li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.faq-answer strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .precision-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .calculator-page {
        padding: 24px 16px;
    }
    
    .calculator-header {
        padding: var(--spacing-xl);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .calculator-header h1 {
        font-size: 2rem;
    }
    
    .header-text p {
        font-size: 0.95rem;
    }
    
    .calculator-badges {
        justify-content: center;
    }
    
    .conversion-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .conversion-arrow {
        transform: rotate(90deg);
        padding: var(--spacing-sm);
    }
    
    .category-tabs {
        justify-content: center;
    }
    
    .tab-button {
        font-size: 0.8rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .calculator-header {
        padding: var(--spacing-lg);
    }
    
    .calculator-header h1 {
        font-size: 1.75rem;
    }
    
    .header-text p {
        font-size: 0.9rem;
    }
    
    .calculator-icon i {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .badge {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .faq-question {
        font-size: 1rem;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .faq-icon {
        width: 20px;
        height: 20px;
        font-size: 0.7rem;
    }
    
    .faq-answer p,
    .faq-answer li {
        font-size: 0.9rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .precision-card {
        flex-direction: column;
        text-align: center;
    }
    
    .category-tabs {
        gap: var(--spacing-xs);
    }
    
    .tab-button {
        flex: 1;
        min-width: 0;
        font-size: 0.75rem;
        padding: var(--spacing-sm);
    }
    
    .tab-button span {
        display: none;
    }
    
    .tab-button i {
        margin: 0;
    }
}

/* Print Styles */
@media print {
    .calculator-header,
    .faq-section {
        break-inside: avoid;
    }
    
    .conversion-panel {
        break-inside: avoid;
    }
    
    .precision-card {
        break-inside: avoid;
    }
    
    .content-card {
        break-inside: avoid;
    }
}