/* =========================================
   Performance & Typography Imports
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* =========================================
   CSS Variables & Design Tokens
   ========================================= */
:root {
    /* Color Palette */
    --color-bg: #050505;
    --color-bg-alt: #0a0a0a;
    --color-bg-card: #121212;
    --color-text: #e0e0e0;
    --color-text-muted: #9e9e9e;
    --color-accent: #00e676; /* Vivid green for high contrast CTA */
    --color-accent-hover: #00c853;
    --color-border: #222222;
    --color-border-hover: #333333;
    
    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing Scale */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Micro-Animations & Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-medium: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================
   Modern CSS Reset
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

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

/* =========================================
   Base Typography
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    color: #ffffff;
    font-weight: 700;
    line-height: 1.1;
}

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

a:hover, a:focus {
    color: var(--color-accent-hover);
}

/* Accessible focus outline */
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

/* =========================================
   Layout Architecture
   ========================================= */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--color-text-muted);
    font-size: clamp(1rem, 2vw, 1.125rem);
}

/* =========================================
   Components: Buttons
   ========================================= */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-medium);
}

.btn-primary {
    background-color: var(--color-accent);
    color: #000000;
    border: 1px solid var(--color-accent);
    box-shadow: 0 4px 20px rgba(0, 230, 118, 0.15);
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--color-accent-hover);
    color: #000000;
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 230, 118, 0.25);
}

/* =========================================
   Header & Navigation
   ========================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.05em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a:not(.btn-nav)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--color-accent);
    transition: width var(--transition-fast);
}

.nav-links a:not(.btn-nav):hover::after,
.nav-links a:not(.btn-nav):focus::after {
    width: 100%;
}

.btn-nav {
    border: 1px solid var(--color-border);
    padding: 0.6rem 1.5rem;
    border-radius: 2px;
    transition: all var(--transition-medium);
}

.btn-nav:hover, .btn-nav:focus {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background-color: rgba(0, 230, 118, 0.05);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px); /* accounting for header */
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Subtle background accent for high-end feel */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 100vw;
    background: radial-gradient(circle, rgba(0, 230, 118, 0.03) 0%, rgba(5,5,5,0) 60%);
    z-index: -1;
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    animation: fadeUp 0.8s ease-out forwards;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 5.5rem);
    letter-spacing: -0.04em;
    margin-bottom: var(--spacing-sm);
    color: #ffffff;
}

.hero-subtext {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   Core Competencies Section (Native Grid)
   ========================================= */
.core-competencies {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.grid-three-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

/* Flexbox for inner card layout */
.competency-card {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 3rem 2rem;
    border-radius: 4px;
    transition: all var(--transition-medium);
}

.competency-card:hover {
    border-color: var(--color-border-hover);
    background-color: #161616;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.card-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.competency-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.competency-card p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
    flex-grow: 1; /* Pushes content down nicely if heights differ */
}

/* =========================================
   Authority Section
   ========================================= */
.authority-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.authority-content {
    max-width: 800px;
    text-align: center;
}

.authority-body {
    position: relative;
    padding: var(--spacing-md) 0;
}

.authority-body::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 6rem;
    color: var(--color-border-hover);
    line-height: 1;
    font-family: serif;
    opacity: 0.3;
}

.authority-text {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: #ffffff;
    font-weight: 300;
    line-height: 1.6;
    letter-spacing: -0.01em;
}

/* =========================================
   Footer (Flexbox & Grid Mix)
   ========================================= */
.site-footer {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h2 {
    font-size: 1.5rem;
    letter-spacing: -0.05em;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    color: #ffffff;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.footer-contact h3 {
    font-size: 1rem;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.footer-contact address {
    font-style: normal;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* =========================================
   Responsive Design & Mobile-First Tweaks
   ========================================= */
@media (max-width: 768px) {
    .site-header {
        position: relative; /* Prevent header covering content on very small screens */
    }

    .main-nav {
        flex-direction: column;
        height: auto;
        padding: var(--spacing-sm) 0;
        gap: var(--spacing-sm);
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1.5rem;
        padding-top: var(--spacing-sm);
        border-top: 1px solid var(--color-border);
    }
    
    .btn-nav {
        border: none;
        padding: 0;
    }
    
    .btn-nav:hover, .btn-nav:focus {
        background-color: transparent;
    }
    
    .hero {
        min-height: 60vh;
        padding: var(--spacing-lg) 0;
    }
    
    .competency-card {
        padding: 2rem 1.5rem;
    }
}