:root {
    --bg: #09090b;
    --fg: #fafafa;
    --muted: #a1a1aa;
    --muted-foreground: #71717a;
    --accent: #3b82f6; /* Modern React/SaaS Blue */
    --border: #27272a;
    --card: #09090b;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* SaaS Style Dot Grid */
.dot-grid {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(var(--border) 1px, transparent 1px);
    background-size: 24px 24px;
    mask-image: radial-gradient(ellipse at center, black, transparent 80%);
}

/* Header/Nav */
header {
    padding: 2rem 0;
    display: flex;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 9999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--accent);
}

/* Hero */
#hero {
    padding: 8rem 0 6rem;
    text-align: left;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.bio {
    font-size: 1.25rem;
    color: var(--muted);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

/* Expertise Grid */
#expertise {
    padding: 4rem 0;
}

.section-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted-foreground);
    margin-bottom: 2rem;
    display: block;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 0.75rem;
    transition: all 0.2s ease;
}

.card:hover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.02);
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--muted);
    font-size: 0.9375rem;
}

.card-mono {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    margin-bottom: 1rem;
    display: block;
}

/* Contact */
#contact {
    padding: 6rem 0 10rem;
}

.contact-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.9375rem;
}

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

.btn-primary:hover {
    background: #2563eb;
}

.btn-secondary {
    border: 1px solid var(--border);
    color: var(--fg);
    background: rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.link-item {
    color: var(--muted);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 2.5rem; }
    #hero { padding: 4rem 0; }
}