:root {
    /* Industrial Color Palette - Updated to Match Logo (Black/White) */
    --bg-dark: #000000;
    --bg-surface: #121212;
    --bg-panel: #1a1a1a;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    
    /* Logo is mainly Black (#000000) and White (#FFFFFF) */
    --accent-metallic: #a7a9ac; /* Silver/Grey accent */
    --accent-steel: #ffffff;    /* White as primary accent */
    --accent-cta: #ffffff;      /* White CTA */
    --accent-cta-hover: #e0e0e0; /* Light Grey Hover */
    --accent-alert: #d21f3c;
    
    --border-color: #333333;
    --border-active: #ffffff;
    
    /* Typography */
    --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Consolas, 'Liberation Mono', monospace;
    
    /* Layout */
    --container-width: 1280px;
    --header-height: 110px;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --spacing-xl: 96px;
    
    /* Industrial UI Elements */
    --radius-sharp: 0px;
    --radius-sm: 2px;
    --shadow-card: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-depth: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3rem;
    letter-spacing: 0.1em;
}

h2 {
    font-size: 2.25rem;
    color: var(--accent-metallic);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--accent-cta);
    padding-left: var(--spacing-sm);
}

h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    max-width: 75ch;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-lg { margin-bottom: var(--spacing-lg); }

section {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

/* Grid Systems */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

/* Header & Nav */
header {
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

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

.logo-img {
    max-height: 180px;
    width: auto;
    display: block;
}

nav ul {
    display: flex;
    gap: 48px; /* Increased from var(--spacing-md) */
}

nav a {
    font-size: 1rem; /* Increased from 0.9rem */
    font-weight: 700; /* Increased from 600 */
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

nav a:hover {
    color: var(--accent-cta);
    border-bottom-color: var(--accent-cta);
}

/* Buttons */
.cta-button, .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #003366;
    color: #fff;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.cta-button:hover, .btn-primary:hover {
    background-color: #004080;
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.btn-steel {
    background-color: #003366;
    color: #fff;
}

.btn-steel:hover {
    background-color: #004080;
    box-shadow: var(--shadow-card);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(18, 18, 18, 0.8), rgba(18, 18, 18, 0.9)), 
                url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&q=80');
    background-size: cover;
    background-position: center;
    min-height: 80vh;
    display: flex;
    align-items: center;
    border-bottom: 4px solid var(--accent-cta);
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    border-left: 2px solid var(--accent-metallic);
    padding-left: var(--spacing-sm);
}


/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--accent-steel);
    transition: background-color 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--border-active);
    box-shadow: var(--shadow-depth);
}

.card:hover::before {
    background-color: var(--accent-cta);
}

.card h3 {
    margin-top: var(--spacing-sm);
    font-size: 1.25rem;
}

/* Feature Section */
.feature-section {
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.feature-grid {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
}

.feature-content {
    flex: 2;
    min-width: 300px;
}

.feature-stat {
    flex: 1;
    min-width: 250px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    text-align: center;
    position: relative;
}

.feature-stat::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, transparent 50%, var(--accent-cta) 50%);
}

.stat-number {
    font-size: 4rem;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

/* Lists */
.list-industrial {
    margin-top: var(--spacing-sm);
}

.list-industrial li {
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.list-industrial li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--accent-cta);
}

/* Forms */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-metallic);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 16px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color 0.2s ease;
    border-radius: var(--radius-sm);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-cta);
    background-color: #151515;
}

/* SMS Consent Box - Specific Industrial Styling */
.sms-consent-box {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    position: relative;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 24px 0;
    background-color: var(--bg-dark);
    padding: 16px;
    border: 1px solid var(--border-color);
}

.checkbox-group input[type="checkbox"] {
    margin-top: 4px;
    accent-color: var(--accent-cta);
    width: 18px;
    height: 18px;
}

.disclaimer-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: 24px;
}

/* Footer */
footer {
    background-color: #0a0a0a;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
    border-top: 4px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1rem;
    color: var(--accent-metallic);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    display: inline-block;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--accent-cta);
    padding-left: 4px;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
}

/* Clients Section */
.clients-section {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.client-card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    height: 100%;
    min-height: 200px;
    text-decoration: none; /* Ensure links don't have underline */
}

.client-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: var(--accent-cta);
}

.client-logo-container {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-bottom: var(--spacing-sm);
    padding: 10px;
    background-color: transparent !important;
    border-radius: 4px;
}

.client-logo-container.client-logo-container-white {
    background-color: #ffffff !important;
}

.client-logo {
    max-width: 160px;
    max-height: 100px;
    width: auto;
    height: auto;
    /* filter: grayscale(100%); Removed to show colors by default */
    /* opacity: 0.7; Removed for full visibility */
    transition: all 0.3s ease;
}

/* Invert white logos to be visible on white background */
.client-logo.invert-dark {
    filter: invert(1);
    opacity: 1;
}

.client-card:hover .client-logo.invert-dark {
    filter: invert(1);
    opacity: 1;
}

.client-card:hover .client-logo {
    /* filter: grayscale(0%); Default is now color */
    opacity: 1;
}

.client-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: auto;
}

/* Responsive Grid */
@media (max-width: 900px) {
    h1 { font-size: 2.5rem; }
    
    header { height: auto; padding: 16px 0; }
    header .container { flex-direction: column; gap: 16px; }
    
    nav ul { flex-wrap: wrap; justify-content: center; gap: 16px; }
    
    .contact-layout,
    .footer-grid,
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero { text-align: left; padding: 60px 0; }
}

/* Services Section */
.service-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.service-image-container {
    width: auto;
    height: auto;
    overflow: visible;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0;
    margin: 0 auto;
}

.service-image {
    max-width: 100%;
    height: auto;
    width: auto;
    max-height: 500px;
    display: block;
    object-fit: contain;
    object-position: center;
    transition: transform 0.3s ease;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: auto;
    -ms-interpolation-mode: bicubic;
    will-change: transform;
    backface-visibility: hidden;
    margin: 0;
    padding: 0;
}

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

.service-content {
    padding: var(--spacing-sm) 0;
}

.service-content h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-metallic);
}

.service-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

@media (min-width: 600px) {
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-item {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    
    .service-item:nth-child(even) {
        direction: rtl;
    }
    
    .service-item:nth-child(even) .service-content {
        direction: ltr;
    }
}

@media (min-width: 1024px) {
    .clients-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .service-image {
        max-height: 600px;
    }
}