/* ==========================================
   HYLLTRON ELECTRIC - PROFESSIONAL B2B STYLES
   ========================================== */

/* Base Variables */
:root {
    /* Colors - Hylltron Brand Palette (Orange & Green from Logo) */
    --primary-color: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8C5F;
    --secondary-color: #28A745;
    --secondary-dark: #1E7E34;
    --secondary-light: #5CB85C;
    
    --accent-color: #2C3E50;
    --accent-light: #34495E;
    
    --text-primary: #2C3E50;
    --text-secondary: #5A6C7D;
    --text-tertiary: #95A5A6;
    
    --bg-white: #FFFFFF;
    --bg-light: #FFF5F2;
    --bg-lighter: #FFFAF8;
    --bg-dark: #2C3E50;
    
    --border-color: #E0E0E0;
    --border-light: #F0F0F0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

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

/* ==========================================
   CONTAINER & LAYOUT
   ========================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
}

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-brand a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
}

.nav-logo {
    height: 40px;
    width: auto;
    transition: transform var(--transition-base);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link-cta {
    background: var(--primary-color);
    color: white !important;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.nav-link-cta:hover {
    background: var(--primary-dark);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-white);
        box-shadow: var(--shadow-md);
        padding: 1rem 0;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
    }
    
    .nav-menu.active {
        max-height: 500px;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: 0.75rem 2rem;
    }
    
    .nav-link-cta {
        margin: 0.5rem 2rem;
        display: inline-block;
        text-align: center;
    }
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    padding: 8rem 0 5rem;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
    margin-top: 70px;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-logo {
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

.hero-logo img {
    max-width: 500px;
    width: 100%;
    height: auto;
    mix-blend-mode: multiply;
    background: transparent;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.brand-name {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.hero-meta-item i {
    color: var(--primary-color);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-logo img {
        max-width: 300px;
    }
    
    .brand-name {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .nav-logo {
        height: 35px;
    }
}

/* ==========================================
   SECTIONS
   ========================================== */

section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.section-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

.section-intro {
    text-align: center;
    margin-bottom: 3rem;
}

@media (max-width: 768px) {
    section {
        padding: 3rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* ==========================================
   VALUE PROPOSITION
   ========================================== */

.value-proposition {
    background: var(--bg-white);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.value-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.value-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.value-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.value-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ==========================================
   PRODUCT CATEGORIES OVERVIEW
   ========================================== */

.product-categories-overview {
    background: var(--bg-light);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.category-card h3 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

.category-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.category-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--border-light);
}

.category-list li:last-child {
    border-bottom: none;
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
    transition: gap var(--transition-fast);
}

.category-link:hover {
    gap: 0.75rem;
}

/* ==========================================
   WHY HYLLTRON
   ========================================== */

.why-hylltron {
    background: var(--bg-dark);
    color: white;
}

.why-hylltron .section-title {
    color: white;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.why-item {
    text-align: center;
}

.why-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-light);
}

.why-item h3 {
    color: white;
    font-size: 1.25rem;
}

.why-description {
    text-align: center;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 800px;
    margin: 0 auto;
}

/* ==========================================
   APPLICATIONS
   ========================================== */

.applications {
    background: var(--bg-light);
}

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

.application-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.application-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.application-item i {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.application-item span {
    font-weight: 500;
    color: var(--text-primary);
}

/* ==========================================
   PRODUCTS SECTION
   ========================================== */

.products-section {
    background: var(--bg-white);
}

.product-category {
    margin-bottom: 4rem;
    padding: 2.5rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary-color);
}

.product-category-header {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.product-category-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
}

.product-category-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.product-category-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.product-details {
    display: grid;
    gap: 2rem;
}

.product-detail-section {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.product-detail-section h4 {
    font-size: 1.375rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-light);
}

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

.features-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--text-secondary);
}

.features-list i {
    color: var(--secondary-color);
    margin-top: 0.25rem;
}

.sensor-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.sensor-type-card {
    padding: 1.5rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

.sensor-type-card h5 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.sensor-type-card p {
    margin: 0.25rem 0;
    font-size: 0.9375rem;
}

.sensor-note {
    font-size: 0.875rem !important;
    color: var(--text-tertiary) !important;
    font-style: italic;
}

/* Product Showcase */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
    align-items: start;
}

.product-image {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.product-image:hover {
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.product-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

.product-description {
    padding: 1rem 0;
}

.product-description h5 {
    font-size: 1.375rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.product-highlight {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

.product-description > p {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .product-showcase {
        grid-template-columns: 1fr;
    }
    
    .product-image {
        order: -1;
    }
}

/* Product Gallery */
.product-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.gallery-item {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.gallery-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: var(--bg-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.gallery-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-image img {
    transform: scale(1.05);
}

.gallery-caption {
    padding: 1.5rem;
    text-align: center;
}

.gallery-caption h5 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.gallery-caption p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.gallery-tag {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .product-gallery {
        grid-template-columns: 1fr;
    }
    
    .gallery-image {
        height: 240px;
    }
}

.module-grid, .electronics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.module-card, .electronics-card {
    padding: 1.5rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
}

.module-card:hover, .electronics-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.module-card i, .electronics-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.module-card h5, .electronics-card h5 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.module-card p, .electronics-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin: 0;
}

/* Featured Electronics Card */
.electronics-card.featured {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border: 2px solid var(--secondary-color);
}

.feature-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--secondary-color);
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-top: 0.75rem;
}

.feature-highlight {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: white;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--secondary-dark);
    font-weight: 500;
}

/* Instrument Details */
.instrument-detail {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

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

.instrument-header h4 {
    font-size: 1.5rem;
    margin: 0;
}

.product-model {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
}

.instrument-intro {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.instrument-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.instrument-features h5,
.instrument-value h5,
.instrument-applications h5 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* ==========================================
   SENSOR KNOWLEDGE BASE
   ========================================== */

.sensor-knowledge {
    background: var(--bg-lighter);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    margin-top: 4rem;
}

.sensor-knowledge h4 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sensor-knowledge h4 i {
    color: var(--secondary-color);
}

.knowledge-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.7;
}

.sensor-comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.sensor-knowledge-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.sensor-knowledge-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.knowledge-header {
    padding: 2rem;
    text-align: center;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
    border-bottom: 3px solid var(--primary-color);
}

.knowledge-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2.5rem;
}

.thermocouple-icon {
    background: linear-gradient(135deg, #FF6B35 0%, #FF8C5F 100%);
    color: white;
}

.rtd-icon {
    background: linear-gradient(135deg, #0052CC 0%, #4C9AFF 100%);
    color: white;
}

.ntc-icon {
    background: linear-gradient(135deg, #28A745 0%, #5CB85C 100%);
    color: white;
}

.knowledge-header h5 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.sensor-types {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.knowledge-content {
    padding: 2rem;
}

.knowledge-content h6 {
    font-size: 1.125rem;
    color: var(--primary-color);
    margin: 1.5rem 0 0.75rem 0;
    font-weight: 600;
}

.knowledge-content h6:first-child {
    margin-top: 0;
}

.knowledge-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.knowledge-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
}

.knowledge-list li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
}

.knowledge-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.knowledge-list.compact li {
    padding: 0.25rem 0 0.25rem 1.5rem;
}

.knowledge-list.advantages li::before {
    content: "✓";
    color: var(--secondary-color);
}

.knowledge-list.limitations li::before {
    content: "•";
    color: #DC3545;
}

/* Comparison Table */
.sensor-comparison-table {
    margin: 3rem 0;
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.sensor-comparison-table h5 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.sensor-comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.sensor-comparison-table thead {
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
}

.sensor-comparison-table th,
.sensor-comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.sensor-comparison-table th {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.sensor-comparison-table td {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.sensor-comparison-table tbody tr:hover {
    background: var(--bg-lighter);
}

/* Selection Guide */
.selection-guide {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.selection-guide h5 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.selection-guide h5 i {
    color: #FFC107;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.guide-card {
    background: var(--bg-lighter);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.guide-card:nth-child(2) {
    border-left-color: #0052CC;
}

.guide-card:nth-child(3) {
    border-left-color: var(--secondary-color);
}

.guide-card h6 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.guide-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.guide-card ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   TEMPERATURE SENSOR KNOWLEDGE BASE
   ========================================== */

.sensor-knowledge {
    background: var(--bg-lighter);
    padding: 6rem 0;
}

.sensor-knowledge .section-title i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.sensor-comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.sensor-type-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.sensor-type-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.sensor-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--bg-white);
    font-size: 2rem;
}

.sensor-type-card h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.sensor-badge {
    display: block;
    text-align: center;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.sensor-principle,
.sensor-specs,
.sensor-types-list,
.pros-cons {
    margin-top: 1.5rem;
}

.sensor-principle h4,
.sensor-specs h4,
.sensor-types-list h4,
.pros-cons h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.sensor-principle p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.sensor-specs {
    background: var(--bg-lighter);
    padding: 1rem;
    border-radius: var(--radius-md);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-item strong {
    color: var(--text-primary);
}

.spec-item span {
    color: var(--text-secondary);
    text-align: right;
}

.sensor-types-list ul {
    list-style: none;
    padding: 0;
}

.sensor-types-list li {
    padding: 0.5rem 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.sensor-types-list li:last-child {
    border-bottom: none;
}

.sensor-types-list strong {
    color: var(--primary-color);
}

.pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.pros,
.cons {
    padding: 1rem;
    border-radius: var(--radius-md);
}

.pros {
    background: #E8F5E9;
    border-left: 3px solid #00875A;
}

.cons {
    background: #FFF3E0;
    border-left: 3px solid #FF6B35;
}

.pros h4 {
    color: #00875A;
}

.cons h4 {
    color: #FF6B35;
}

.pros ul,
.cons ul {
    list-style: none;
    padding: 0;
    margin-top: 0.5rem;
}

.pros li,
.cons li {
    padding: 0.25rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Comparison Table */
.comparison-table-wrapper {
    margin-top: 4rem;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table-wrapper h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.table-scroll {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.comparison-table thead {
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
}

.comparison-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
}

.comparison-table th i {
    margin-right: 0.5rem;
}

.comparison-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.comparison-table tbody tr:hover {
    background: var(--bg-lighter);
}

.comparison-table td strong {
    color: var(--text-primary);
}

/* Selection Guide */
.selection-guide {
    margin-top: 4rem;
}

.selection-guide h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.guide-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.guide-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.guide-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.guide-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--bg-white);
    font-size: 1.5rem;
}

.guide-card h4 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.guide-card ul {
    list-style: none;
    padding: 0;
}

.guide-card li {
    padding: 0.5rem 0 0.5rem 2rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    position: relative;
    line-height: 1.6;
}

.guide-card li::before {
    content: "→";
    position: absolute;
    left: 0.5rem;
    top: 0.5rem;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1rem;
}

/* ==========================================
   OIL INTELLIGENCE PLATFORM
   ========================================== */

.oil-intelligence {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
}

.platform-concept,
.platform-architecture,
.platform-value,
.platform-applications {
    margin-top: 3rem;
}

.platform-concept h3,
.platform-architecture h3,
.platform-value h3,
.platform-applications h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

.platform-concept p {
    font-size: 1.125rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.architecture-layers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.layer-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
}

.layer-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.layer-number {
    position: absolute;
    top: -15px;
    left: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.layer-card h4 {
    font-size: 1.375rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.value-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.value-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.value-item h4 {
    font-size: 1.125rem;
    margin: 0;
}

.applications-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.app-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.app-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.app-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* ==========================================
   INDUSTRIES
   ========================================== */

.industries {
    background: var(--bg-white);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.industry-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.industry-card:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.industry-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: color var(--transition-fast);
}

.industry-card:hover i {
    color: white;
}

.industry-card h3 {
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

.industry-card:hover h3 {
    color: white;
}

/* ==========================================
   ENGINEERING & CUSTOMIZATION
   ========================================== */

.engineering {
    background: var(--bg-light);
}

.engineering-content {
    margin-top: 3rem;
}

.engineering-process,
.customization-options {
    margin-bottom: 4rem;
}

.engineering-process h3,
.customization-options h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-primary);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.process-step {
    background: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.process-step h4 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
}

.process-step p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0;
}

.customization-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.custom-option {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.custom-option:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.custom-option i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.custom-option h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.custom-option p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ==========================================
   QUALITY & RELIABILITY
   ========================================== */

.quality {
    background: var(--bg-white);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.quality-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-lighter);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.quality-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.quality-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.quality-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.quality-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* ==========================================
   ECOSYSTEM
   ========================================== */

.ecosystem {
    background: var(--bg-dark);
    color: white;
}

.ecosystem .section-title,
.ecosystem .section-description {
    color: white;
}

.ecosystem-members {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.ecosystem-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.ecosystem-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.ecosystem-card.highlight {
    background: rgba(0, 82, 204, 0.2);
    border: 2px solid var(--primary-light);
}

/* Herzon Logo Header */
.herzon-logo-header {
    text-align: center;
    margin-bottom: 2rem;
}

.herzon-logo-header img {
    max-width: 200px;
    height: auto;
    /* Keep original colors - logo should stay colorful */
    filter: none;
    opacity: 1;
}

.ecosystem-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.ecosystem-logo {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem;
}

.ecosystem-logo img {
    max-height: 100%;
    max-width: 180px;
    width: auto;
    height: auto;
    object-fit: contain;
    /* Keep logos colorful - no filter by default */
    filter: none;
    opacity: 1;
    transition: all var(--transition-base);
}

.ecosystem-card:hover .ecosystem-logo img {
    transform: scale(1.05);
}

/* All logos keep their original colors - no filters */
.ecosystem-card .ecosystem-logo img {
    filter: none;
    opacity: 1;
}

.ecosystem-card:hover .ecosystem-logo img {
    opacity: 1;
}

.ecosystem-card h3 {
    font-size: 1.375rem;
    color: white;
    margin-bottom: 1rem;
}

.ecosystem-card h4 {
    font-size: 1.25rem;
    color: white;
    margin-bottom: 0.5rem;
}

.ecosystem-card .company-tagline {
    font-size: 0.875rem;
    color: var(--primary-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.ecosystem-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* Ecosystem Sections */
.ecosystem-section {
    margin-top: 3rem;
}

.ecosystem-section:first-child {
    margin-top: 2rem;
}

.ecosystem-section-title {
    font-size: 1.5rem;
    color: white;
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

.ecosystem-section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-color);
}

/* Portfolio Section */
.portfolio-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.portfolio-companies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.portfolio-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-base);
}

.portfolio-card:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.15);
}

.portfolio-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 135, 90, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #00A86B;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.portfolio-card h4 {
    font-size: 1.125rem;
    color: white;
    margin-bottom: 0.5rem;
}

.portfolio-card .company-type {
    font-size: 0.8125rem;
    color: #00A86B;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.portfolio-card p {
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.ecosystem-summary {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

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

.summary-item {
    text-align: center;
    padding: 1.5rem;
}

.summary-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.summary-item h4 {
    font-size: 1.125rem;
    color: white;
    margin-bottom: 0.75rem;
}

.summary-item p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.ecosystem-summary p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 800px;
    margin: 0 auto;
}

/* ==========================================
   INDUSTRY LEADERS
   ========================================== */

.industry-leaders {
    background: var(--bg-white);
    padding: 5rem 0;
}

.industry-leaders .section-title {
    text-align: center;
    margin-bottom: 1.5rem;
}

.industry-leaders .section-intro {
    max-width: 900px;
    margin: 0 auto 3rem;
    text-align: center;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.industry-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.industry-category {
    text-align: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.industry-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.15);
    border-color: var(--primary-color);
}

.category-icon {
    width: 70px;
    height: 70px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
}

.category-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.industry-category h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.4;
    margin: 0;
}

/* ==========================================
   ABOUT
   ========================================== */

.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.about-intro strong {
    color: var(--primary-color);
    font-weight: 700;
}

.about-focus {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

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

.about-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.highlight-item {
    background: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.highlight-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.highlight-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.highlight-item h4 {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.highlight-item p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ==========================================
   CONTACT
   ========================================== */

.contact {
    background: var(--bg-white);
}

/* Contact Content Centered */
.contact-content-centered {
    max-width: 900px;
    margin: 3rem auto 0;
}

.contact-card {
    background: linear-gradient(135deg, #FFF5F2 0%, #FFE8DF 100%);
    padding: 3rem;
    border-radius: var(--radius-lg);
    text-align: center;
    margin-bottom: 3rem;
    border: 2px solid var(--primary-color);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.1);
}

.contact-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.contact-icon i {
    font-size: 2.5rem;
    color: white;
}

.contact-card h3 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-email-large {
    margin: 1.5rem 0;
}

.contact-email-large a {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-base);
}

.contact-email-large a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.contact-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.btn-large {
    font-size: 1.125rem;
    padding: 1rem 2.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

/* Contact Info Grid */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--bg-lighter);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.info-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-card h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.info-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Contact Guidelines */
.contact-guidelines {
    background: var(--bg-lighter);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--secondary-color);
}

.contact-guidelines h4 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.contact-guidelines h4 i {
    color: var(--secondary-color);
}

.guidelines-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.guidelines-list li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
    border-bottom: 1px solid var(--border-light);
}

.guidelines-list li:last-child {
    border-bottom: none;
}

.guidelines-list li i {
    color: var(--secondary-color);
    margin-right: 0.75rem;
}

.guidelines-list li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.form-message.success {
    display: block;
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #81c784;
}

.form-message.error {
    display: block;
    background: #ffebee;
    color: #c62828;
    border: 1px solid #ef5350;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: white;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.footer-info a {
    color: var(--primary-light);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
    font-size: 0.9375rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ==========================================
   UTILITIES
   ========================================== */

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 1024px) {
    .categories-grid,
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .industry-categories {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sensor-comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-cards {
        grid-template-columns: 1fr;
    }
    
    .pros-cons {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
    
    .categories-grid,
    .industries-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .architecture-layers,
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .industry-categories {
        grid-template-columns: 1fr;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .product-category-header {
        flex-direction: column;
        text-align: center;
    }
    
    /* Contact Mobile */
    .contact-card {
        padding: 2rem 1.5rem;
    }
    
    .contact-email-large a {
        font-size: 1.5rem;
    }
    
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-guidelines {
        padding: 1.5rem;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .product-category-header {
        flex-direction: column;
        text-align: center;
    }
    
    .instrument-header {
        flex-direction: column;
        text-align: center;
    }
    
    .sensor-comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-comparison-table {
        overflow-x: auto;
    }
    
    .sensor-comparison-table table {
        min-width: 600px;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-knowledge {
        padding: 2rem 1rem;
    }
    
    .portfolio-companies {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .ecosystem-section-title {
        font-size: 1.25rem;
    }
    
    .herzon-logo-header img {
        max-width: 150px;
    }
    
    .ecosystem-logo {
        height: 70px;
    }
    
    .ecosystem-logo img {
        max-width: 150px;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ==========================================
   PRINT STYLES
   ========================================== */

@media print {
    .navbar,
    .nav-toggle,
    .hero-cta,
    .contact-form {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    section {
        page-break-inside: avoid;
    }
}