:root {
  --bg: #0d1117;
  --bg-alt: #11161d;
  --text: #e6edf3;
  --text-dim: #9aa7b4;
  --accent: #36A9E1;
  --border: #1f2732;
  --max-width: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

nav a {
  color: var(--text);
  margin-left: 1.5rem;
  font-weight: 500;
}
nav a:hover { color: var(--accent); text-decoration: none; }

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

.hero-logo {
  width: min(800px, 90%);
  height: auto;
  margin-bottom: 1.5rem;
}

.tagline {
  color: var(--text-dim);
  font-size: 1.15rem;
  margin: 0;
}

.section {
  padding: 3.5rem 0;
}

.section.alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  font-size: 1.75rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
}

.links-inline {
  color: var(--text-dim);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.card h3 {
  margin: 0 0 0.25rem;
}

.card-meta {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0 0 0.75rem;
}

.card-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 500;
}

.more-link {
  margin-top: 2rem;
  color: var(--text-dim);
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li {
  padding: 0.4rem 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 600px) {
  .header-inner { flex-direction: column; gap: 0.5rem; }
  nav a { margin: 0 0.75rem; }
  .hero { padding: 3.5rem 0 2.5rem; }
  .hero h1 { font-size: 2.1rem; }
}