:root {
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    /* Sky blue for primary actions/highlights */
    --accent-dim: #0ea5e9;
    /* Slightly darker for hover/active */
    --accent-glow: rgba(56, 189, 248, 0.15);
    --border-color: rgba(255, 255, 255, 0.08);
    /* Subtle border for separation */

    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    max-width: 1000px;
    /* Reduced max-width for better reading experience */
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Nav */
.site-header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background-color: rgba(15, 23, 42, 0.9);
    /* Glass effect */
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

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

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

.nav-link {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: -0.01em;
}

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

.lang-switch {
    font-size: 0.85rem;
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.lang-switch:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Hero Section */
.hero-section {
    padding: 8rem 0 6rem;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.hero-content {
    max-width: 800px;
}

h1 {
    font-size: 3rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.text-accent {
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    font-weight: 400;
    margin-bottom: 2rem;
}

/* Sections */
.section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.content-block {
    margin-bottom: 3rem;
}

.content-block h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

.content-block p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

/* Grid for Services/Features */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

/* About Page Specifics */
.bio-header {
    margin-bottom: 3rem;
}

.bio-meta {
    font-family: monospace;
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Footer & Legal */
.site-footer {
    background-color: var(--bg-secondary);
    padding: 4rem 0 2rem;
    font-size: 0.9rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-legal h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    opacity: 0.7;
}

.legal-list {
    list-style: none;
}

.legal-list li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.legal-list strong {
    color: var(--text-primary);
    font-weight: 500;
}

.copyright {
    text-align: center;
    color: var(--text-secondary);
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.25rem;
    }

    .grid-2,
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .main-nav ul {
        gap: 1.5rem;
    }
}