:root {
  --bg: #0a0e14;
  --text: #e6edf3;
  --accent: #00d4ff;
  --muted: #8b949e;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
  --font-sans: -apple-system, "Segoe UI", Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
}

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

header {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 20, 0.9);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid #1c232e;
  z-index: 10;
}

nav {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
}

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

.nav-links a {
  color: var(--text);
  font-size: 0.9rem;
}

.nav-links a:hover { color: var(--accent); }

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

#hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

#hero h1 {
  font-family: var(--font-mono);
  font-size: 3rem;
  color: var(--accent);
}

.tagline {
  font-family: var(--font-mono);
  color: var(--muted);
  margin-top: 0.5rem;
}

.intro {
  max-width: 560px;
  margin: 1.5rem auto 2rem;
  color: var(--text);
}

.btn-primary {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.6rem 1.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

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

.project-card {
  padding: 3rem 0;
  border-top: 1px solid #1c232e;
}

.project-card h2 {
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 1rem;
}

.tags {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.2rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid #1c232e;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
}

footer#contact {
  text-align: center;
  padding: 3rem 1.5rem;
  border-top: 1px solid #1c232e;
  color: var(--muted);
  font-size: 0.85rem;
}

footer#contact a {
  color: var(--accent);
}

.copyright {
  margin-top: 0.5rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

@media (max-width: 640px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid #1c232e;
    padding: 1rem 1.5rem;
    gap: 1rem;
  }

  nav { position: relative; }

  .nav-links.nav-open { display: flex; }

  #hero h1 { font-size: 2.2rem; }
}