/* ===================================
   CSS Variables & Reset
   =================================== */

:root {
    /* Color Palette - Engineering Navy Blue Theme */
    --color-navy-dark: #0a1628;
    --color-navy: #1a2a4a;
    --color-navy-medium: #2a3f5f;
    --color-navy-light: #3d5a7e;
    --color-accent: #4a90e2;
    --color-accent-bright: #5aa3ff;
    --color-grey-light: #e8ecf1;
    --color-grey-medium: #c4cdd5;
    --color-grey-dark: #697a8d;
    --color-white: #ffffff;
    --color-text-dark: #1a1a1a;
    
    /* Typography */
    --font-display: 'JetBrains Mono', monospace;
    --font-body: 'IBM Plex Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --container-max: 1200px;
    --nav-height: 70px;
    
    /* Transitions */
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ===================================
   Navigation
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-grey-light);
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    height: 100%;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--color-navy-dark);
}

.logo-icon {
    color: var(--color-navy);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-navy);
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-navy);
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: var(--nav-height);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-md);
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

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

.hero-label {
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--color-accent);
    color: var(--color-white);
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid var(--color-accent);
    border-radius: 4px;
    transition: all var(--transition-base);
    animation: fadeInUp 1s ease 0.8s backwards;
}

.cta-button:hover {
    background: transparent;
    border-color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(74, 144, 226, 0.3);
}

/* ===================================
   Container & Section Utilities
   =================================== */

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

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

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

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-navy-dark);
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 0 auto var(--spacing-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-grey-dark);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Company Information Section
   =================================== */

.company-info {
    background: var(--color-grey-light);
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.info-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.info-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.info-title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.info-detail {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-navy-dark);
    margin-bottom: var(--spacing-xs);
}

.info-description {
    color: var(--color-grey-dark);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===================================
   Mission Section
   =================================== */

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

.mission-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.mission-card {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-base);
}

.mission-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transform: translate(50%, -50%);
}

.mission-card:hover {
    transform: translateX(5px);
}

.mission-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.mission-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.mission-description {
    font-size: 1rem;
    line-height: 1.7;
    opacity: 0.95;
}

/* ===================================
   Services Section
   =================================== */

.services {
    background: var(--color-grey-light);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-top: 3px solid var(--color-navy);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.service-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.service-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

.service-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-navy-dark);
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.service-list li {
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-grey-dark);
    line-height: 1.6;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 1px;
    transform: rotate(45deg);
}

/* ===================================
   Contact Section
   =================================== */

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

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

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-grey-light);
    border-left: 3px solid var(--color-accent);
}

.contact-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-item h4 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--color-grey-dark);
    font-size: 0.95rem;
}

/* Contact Form */
.contact-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-navy);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--color-grey-medium);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Honeypot field - hidden from view but not from screen readers */
.honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
}

.submit-button {
    padding: 1rem 2rem;
    background: var(--color-navy);
    color: var(--color-white);
    border: 2px solid var(--color-navy);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    justify-self: start;
}

.submit-button:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(74, 144, 226, 0.3);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--color-navy-dark);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
}

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

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.footer-logo svg {
    color: var(--color-accent);
}

.footer-text {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.footer-copyright {
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ===================================
   Responsive Design - Mobile First
   =================================== */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .mission-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr 1.5fr;
    }
    
    .contact-form {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile Navigation (max-width: 767px) */
@media (max-width: 767px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .company-name {
        font-size: 0.75rem;
    }
}

/* Small mobile adjustments */
@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero {
        min-height: 80vh;
    }
    
    .mission-number {
        font-size: 2rem;
    }
}