/* =======================
   CSS Custom Properties
   ======================= */
:root {
    /* Color Palette - Dark Theme */
    --background: 218 23% 8%;           /* #0F1419 */
    --surface: 218 20% 12%;             /* #1A1F2E */
    --surface-elevated: 218 18% 16%;    /* #252A3A */
    --surface-hover: 218 16% 20%;       /* #2F3441 */
    
    --text-primary: 210 20% 95%;        /* #F1F3F5 */
    --text-secondary: 210 15% 75%;      /* #B8BCC8 */
    --text-muted: 210 10% 55%;          /* #7D848F */
    
    --accent-primary: 212 100% 60%;     /* #3399FF */
    --accent-secondary: 45 100% 65%;    /* #FFD700 */
    --accent-success: 142 76% 36%;      /* #16A34A */
    --accent-warning: 38 92% 50%;       /* #F59E0B */
    
    --border: 218 15% 25%;              /* #3A404C */
    --border-light: 218 12% 30%;        /* #434951 */
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow: 0 4px 6px -1px hsla(218, 23%, 5%, 0.1);
    --shadow-lg: 0 10px 15px -3px hsla(218, 23%, 5%, 0.1);
    
    /* Transitions */
    --transition: all 0.2s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
}

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

/* =======================
   Typography
   ======================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-sm);
    color: hsl(var(--text-secondary));
}

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

a:hover {
    color: hsl(var(--accent-secondary));
}

/* =======================
   Layout Components
   ======================= */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: hsl(var(--text-muted));
    max-width: 600px;
    margin: 0 auto;
}

/* =======================
   Navigation
   ======================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: hsla(var(--background), 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid hsl(var(--border));
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand .brand-link {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: hsl(var(--text-primary));
}

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

.nav-link {
    font-weight: var(--font-weight-medium);
    color: hsl(var(--text-secondary));
    transition: var(--transition);
}

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

.nav-link--future {
    opacity: 0.5;
    pointer-events: none;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: hsl(var(--text-primary));
    margin: 3px 0;
    transition: var(--transition);
}

/* =======================
   Hero Section
   ======================= */
.hero {
    padding: calc(70px + var(--space-3xl)) 0 var(--space-3xl);
    background: linear-gradient(135deg, hsl(var(--background)) 0%, hsl(var(--surface)) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    margin-bottom: var(--space-lg);
}

.hero-company {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-sm);
}

.hero-slogan {
    display: block;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: hsl(var(--accent-primary));
    font-weight: var(--font-weight-medium);
}

.hero-description {
    font-size: 1.25rem;
    color: hsl(var(--text-secondary));
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* =======================
   Buttons
   ======================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    min-width: 140px;
}

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

.btn-primary:hover {
    background-color: hsl(212 100% 55%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    border-color: hsl(var(--accent-primary));
    color: hsl(var(--accent-primary));
    background-color: hsla(var(--accent-primary), 0.1);
}

/* =======================
   Company Overview
   ======================= */
.company-overview {
    background-color: hsl(var(--surface));
}

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

.overview-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: hsl(var(--text-secondary));
}

/* =======================
   Core Competencies
   ======================= */
.competencies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.competency-item {
    background-color: hsl(var(--surface));
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid hsl(var(--border));
    transition: var(--transition);
    text-align: center;
}

.competency-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--accent-primary));
}

.competency-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.competency-item h3 {
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-sm);
}

.competency-item p {
    color: hsl(var(--text-muted));
}

/* =======================
   Differentiators
   ======================= */
.differentiators {
    background-color: hsl(var(--surface));
}

.differentiators-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.differentiator-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background-color: hsl(var(--surface-elevated));
    border-radius: var(--border-radius-lg);
    border: 1px solid hsl(var(--border));
    transition: var(--transition);
}

.differentiator-item:hover {
    border-color: hsl(var(--accent-primary));
    background-color: hsl(var(--surface-hover));
}

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

.differentiator-content h3 {
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-xs);
}

.differentiator-content p {
    color: hsl(var(--text-muted));
    margin: 0;
}

/* =======================
   Company Data
   ======================= */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.data-item {
    background-color: hsl(var(--surface));
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid hsl(var(--border));
    text-align: center;
    transition: var(--transition);
}

.data-item:hover {
    border-color: hsl(var(--accent-secondary));
    background-color: hsl(var(--surface-elevated));
}

.data-item h3 {
    color: hsl(var(--accent-secondary));
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.data-item p {
    color: hsl(var(--text-primary));
    font-weight: var(--font-weight-medium);
    margin: 0;
    line-height: 1.5;
}

/* =======================
   Contact Section
   ======================= */
.contact {
    background-color: hsl(var(--surface));
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background-color: hsl(var(--surface-elevated));
    border-radius: var(--border-radius-lg);
    border: 1px solid hsl(var(--border));
    transition: var(--transition);
}

.contact-item:hover {
    border-color: hsl(var(--accent-primary));
    background-color: hsl(var(--surface-hover));
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h3 {
    color: hsl(var(--text-primary));
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.contact-details p,
.contact-details a {
    color: hsl(var(--text-secondary));
    margin: 0;
}

.contact-details a:hover {
    color: hsl(var(--accent-primary));
}

/* =======================
   Footer
   ======================= */
.footer {
    background-color: hsl(var(--background));
    border-top: 1px solid hsl(var(--border));
    padding: var(--space-xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-brand h3 {
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-xs);
}

.footer-brand p {
    color: hsl(var(--accent-primary));
    margin: 0;
    font-weight: var(--font-weight-medium);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    color: hsl(var(--text-muted));
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.4;
}

/* =======================
   Responsive Design
   ======================= */

/* Tablet Styles */
@media (max-width: 768px) {
    :root {
        --space-3xl: 4rem;
        --space-2xl: 3rem;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: hsl(var(--surface));
        border-bottom: 1px solid hsl(var(--border));
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-slow);
    }

    .nav-menu--active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle--active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .mobile-menu-toggle--active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .competencies-grid {
        grid-template-columns: 1fr;
    }

    .data-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

/* Mobile Styles */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    .hero {
        padding: calc(70px + var(--space-2xl)) 0 var(--space-2xl);
        min-height: auto;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }

    .differentiator-item {
        flex-direction: column;
        text-align: center;
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }

    .data-grid {
        grid-template-columns: 1fr;
    }
}

/* =======================
   Accessibility & Performance
   ======================= */

/* Focus states for keyboard navigation */
.nav-link:focus,
.btn:focus,
a:focus {
    outline: 2px solid hsl(var(--accent-primary));
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border: 210 20% 40%;
        --border-light: 210 20% 50%;
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-cta,
    .mobile-menu-toggle {
        display: none;
    }

    body {
        color: black;
        background: white;
    }

    .section {
        padding: 1rem 0;
    }
}