:root {
    --bg-color: #050505;
    --text-color: #FAFAFA;
    --text-muted: #888888;
    --accent-color: #333333;
    --border-color: #222222;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --container-width: 1200px;
    --header-height: 70px;
}

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

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

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

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

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: #e0e0e0;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    margin-left: var(--spacing-sm);
}

.btn-secondary:hover {
    border-color: var(--text-color);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.subtext {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.section-label {
    font-size: 0.875rem;
    font-family: monospace; /* Gives that technical infrastructure feel */
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.eyebrow {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

/* Header */
.site-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.brand-logo {
    font-weight: 700;
    font-size: 1.25rem;
    text-transform: uppercase; /* Consistent with request */
    letter-spacing: 0.05em;
}

/* Main Layout */
main {
    padding-top: var(--header-height);
}

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

/* Grid System for Sections */
.section-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .section-grid {
        grid-template-columns: 1fr;
    }
    
    .section-label {
        margin-bottom: var(--spacing-sm);
    }

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

/* Hero Section */
.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

/* About Section */
.lead-text {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    max-width: 900px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.expertise-item {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.expertise-item:hover {
    color: var(--text-color);
    border-color: var(--text-muted);
}

/* Products Section */
.product-card {
    background: #0a0a0a;
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    border-radius: 8px;
    max-width: 800px; /* Limit width for readability */
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.tag {
    background: var(--text-color);
    color: var(--bg-color);
    padding: 4px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 2px;
    text-transform: uppercase;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    margin-top: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-color);
    border-bottom: 1px solid transparent;
}

.link-arrow:hover {
    border-bottom-color: var(--text-color);
    opacity: 1;
}

.link-arrow span {
    margin-left: 4px;
    transition: transform 0.2s ease;
}

.link-arrow:hover span {
    transform: translate(2px, -2px);
}

/* Philosophy */
.philosophy-list {
    border-left: 1px solid var(--border-color);
}

.philosophy-list li {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1.25rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.philosophy-list li:hover {
    color: var(--text-color);
    padding-left: calc(var(--spacing-md) + 10px);
}

.philosophy-list li:first-child {
    border-top: 1px solid var(--border-color);
}

/* Founder */
.role {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.portfolio-card {
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 140px;
    transition: background-color 0.2s ease;
}

.portfolio-card:hover {
    background-color: #0d0d0d;
}

/* Contact */
.email-link {
    font-size: 1.5rem;
    font-weight: 300;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2px;
}

.email-link:hover {
    border-bottom-color: var(--text-color);
}

/* Footer */
.site-footer {
    padding: var(--spacing-lg) 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
}