/* ========================================
   CSS RESET & BASE
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #0066CC;
    --secondary: #7CB342;
    --accent: #FF6B35;
    --neutral-dark: #1A1A1A;
    --neutral-medium: #666666;
    --neutral-light: #F5F7FA;
    --white: #FFFFFF;
    
    /* Typography */
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-xxl: 96px;
    
    /* Border & Shadow */
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --box-shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--neutral-dark);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* ========================================
   UTILITIES
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-light {
    background-color: var(--neutral-light);
}

.section-accent {
    background: linear-gradient(135deg, var(--primary) 0%, #004999 100%);
    color: var(--white);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.section-header-white {
    color: var(--white);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-dark);
}

.section-header-white .section-title {
    color: var(--white);
}

.section-description {
    font-size: 1.125rem;
    color: var(--neutral-medium);
    line-height: 1.7;
}

.section-header-white .section-description {
    color: rgba(255, 255, 255, 0.9);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-2-wide {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: #E55A2B;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--primary);
    color: var(--white);
}

.btn-full {
    width: 100%;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 70px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-llc {
    color: var(--secondary);
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--neutral-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

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

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

.nav-cta {
    background-color: var(--primary);
    color: var(--white);
    padding: 10px 24px;
    border-radius: var(--border-radius);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover,
.nav-cta:focus {
    background-color: #0052A3;
    color: var(--white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--neutral-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    margin-top: 70px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.05) 0%, rgba(124, 179, 66, 0.05) 100%);
    padding: var(--spacing-xxl) 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--neutral-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--neutral-medium);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-dark);
    margin-bottom: var(--spacing-xs);
}

.card-text {
    color: var(--neutral-medium);
    line-height: 1.6;
}

/* Service Cards */
.service-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.service-card:hover {
    border-left-color: var(--secondary);
    transform: translateX(4px);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.service-description {
    color: var(--neutral-medium);
}

/* ========================================
   FEATURES
   ======================================== */
.feature {
    display: flex;
    gap: var(--spacing-md);
}

.feature-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.3;
    flex-shrink: 0;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

.feature-text {
    color: var(--neutral-medium);
}

/* ========================================
   INDUSTRIES
   ======================================== */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-sm);
}

.industry-item {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    font-weight: 500;
    color: var(--neutral-dark);
    transition: var(--transition);
}

.industry-item:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: scale(1.05);
}

/* ========================================
   VALUE CARDS
   ======================================== */
.value-card {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.value-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.value-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--white);
}

.value-text {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* ========================================
   MISSION & VISION
   ======================================== */
.mission-vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.mission-box,
.vision-box {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.mission-box {
    background: linear-gradient(135deg, var(--primary) 0%, #004999 100%);
    color: var(--white);
}

.vision-box {
    background: linear-gradient(135deg, var(--secondary) 0%, #5a8f2f 100%);
    color: var(--white);
}

.mission-title,
.vision-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.mission-text,
.vision-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    opacity: 0.95;
}

/* ========================================
   CONTACT
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

.contact-details a {
    color: var(--primary);
    display: inline-block;
    margin-top: 4px;
}

.contact-details a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background-color: var(--neutral-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #E0E0E0;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background-color: var(--neutral-dark);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo-text {
    color: var(--white);
    font-size: 1.5rem;
}

.footer-brand .logo-llc {
    color: var(--secondary);
}

.footer-tagline {
    margin-top: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--white);
}

.footer-links a,
.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-links a:hover {
    color: var(--secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--box-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary);
    transform: translateY(-4px);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background-color: var(--white);
        padding: var(--spacing-lg);
        box-shadow: var(--box-shadow);
        transition: var(--transition);
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Focus Styles for Accessibility */
*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}