/**
 * USB Specifications Technical Standards Styles
 * Namespace: techStandards_usb-specifications
 */

/* CSS Variables - Reference homepage colors */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent-color: #7c3aed;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --black: #000000;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 3rem;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Header Styles - Exact copy from homepage */
.site-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
}

.logo:hover {
    color: var(--white);
}

.logo svg {
    width: 32px;
    height: 32px;
    fill: var(--white);
}

/* Navigation Styles */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.main-nav > ul > li {
    position: relative;
}

.main-nav a {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    white-space: nowrap;
    font-size: 1rem;
    color: var(--white);
}

.main-nav a:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--white);
    text-decoration: none;
}

.main-nav svg {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-md);
    fill: currentColor;
}

/* Main Standards Container */
.techStandards_usb-specifications {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: var(--gray-50);
    min-height: 100vh;
}

/* Standard Header */
.techStandards_usb-specifications .standard-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    background: var(--white);
    padding: var(--spacing-3xl);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.techStandards_usb-specifications .standard-header .standard-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-light), var(--success-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xl);
    color: var(--white);
    font-size: 2rem;
}

.techStandards_usb-specifications .standard-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.techStandards_usb-specifications .standard-header p {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Section Titles */
.techStandards_usb-specifications .section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.techStandards_usb-specifications .section-title i {
    color: var(--success-color);
    font-size: 1.25rem;
}

/* Standard Overview */
.techStandards_usb-specifications .standard-overview {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .overview-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.techStandards_usb-specifications .overview-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.techStandards_usb-specifications .overview-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-light), var(--success-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.techStandards_usb-specifications .overview-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.techStandards_usb-specifications .overview-content p {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* USB Versions Section */
.techStandards_usb-specifications .usb-versions-section {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .versions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .version-item {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border-left: 4px solid var(--primary-light);
    transition: all var(--transition-normal);
}

.techStandards_usb-specifications .version-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.techStandards_usb-specifications .version-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.techStandards_usb-specifications .version-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.techStandards_usb-specifications .version-specs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.techStandards_usb-specifications .spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-200);
}

.techStandards_usb-specifications .spec-label {
    font-weight: 600;
    color: var(--gray-700);
}

.techStandards_usb-specifications .spec-value {
    font-family: 'Courier New', monospace;
    color: var(--primary-light);
    font-weight: 500;
}

/* Automotive Applications Section */
.techStandards_usb-specifications .automotive-applications-section {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .automotive-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .automotive-category {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border-left: 4px solid var(--success-color);
}

.techStandards_usb-specifications .automotive-category h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.techStandards_usb-specifications .automotive-category p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.techStandards_usb-specifications .automotive-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.techStandards_usb-specifications .auto-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-200);
}

.techStandards_usb-specifications .auto-label {
    font-weight: 600;
    color: var(--gray-700);
}

.techStandards_usb-specifications .auto-value {
    font-family: 'Courier New', monospace;
    color: var(--success-color);
    font-weight: 500;
}

/* FAQ Section */
.techStandards_usb-specifications .faq-section {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .faq-item {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.techStandards_usb-specifications .faq-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.techStandards_usb-specifications .faq-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.techStandards_usb-specifications .faq-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Authority Standards Section */
.techStandards_usb-specifications .authority-standards-section {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .authority-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .authority-item {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border-left: 4px solid var(--success-color);
    transition: all var(--transition-normal);
}

.techStandards_usb-specifications .authority-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.techStandards_usb-specifications .authority-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.techStandards_usb-specifications .authority-item p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.techStandards_usb-specifications .authority-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--success-color);
    font-weight: 600;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    min-height: 44px;
    min-width: 44px;
}

.techStandards_usb-specifications .authority-link:hover {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

/* Legal Information Section */
.techStandards_usb-specifications .legal-info-section {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.techStandards_usb-specifications .legal-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.techStandards_usb-specifications .legal-item {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border-left: 4px solid var(--warning-color);
}

.techStandards_usb-specifications .legal-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.techStandards_usb-specifications .legal-item p {
    color: var(--gray-600);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

    .mobile-nav-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--white);
        font-size: 1.5rem;
        cursor: pointer;
        padding: var(--spacing-md);
        min-height: 44px;
        min-width: 44px;
    }

    .mobile-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        transition: left var(--transition-normal);
        z-index: 1000;
        overflow-y: auto;
    }

    .mobile-nav.active {
        left: 0;
    }

    .mobile-nav ul {
        list-style: none;
        padding: var(--spacing-xl);
    }

    .mobile-nav li {
        margin-bottom: var(--spacing-md);
    }

    .mobile-nav a {
        display: flex;
        align-items: center;
        padding: var(--spacing-lg);
        color: var(--gray-800);
        text-decoration: none;
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
        min-height: 44px;
        font-size: 1rem;
    }

    .mobile-nav a:hover {
        background-color: var(--gray-100);
        color: var(--primary-color);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .techStandards_usb-specifications .overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .techStandards_usb-specifications .versions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .techStandards_usb-specifications .authority-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .techStandards_usb-specifications .overview-grid,
    .techStandards_usb-specifications .versions-grid,
    .techStandards_usb-specifications .automotive-grid,
    .techStandards_usb-specifications .faq-grid,
    .techStandards_usb-specifications .authority-grid {
        grid-template-columns: 1fr;
    }

    .techStandards_usb-specifications .standard-header h1 {
        font-size: 2rem;
    }

    .techStandards_usb-specifications .standard-header p {
        font-size: 1rem;
    }

    .techStandards_usb-specifications .overview-item {
        flex-direction: column;
        text-align: center;
    }

    /* Ensure minimum font sizes for mobile */
    .techStandards_usb-specifications .breadcrumb-item {
        font-size: 14px;
    }

    .techStandards_usb-specifications .spec-label,
    .techStandards_usb-specifications .auto-label {
        font-size: 14px;
    }

    .techStandards_usb-specifications .spec-value,
    .techStandards_usb-specifications .auto-value {
        font-size: 14px;
    }

    /* Ensure touch targets are at least 44px */
    .techStandards_usb-specifications .authority-link {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
}