:root {
  color-scheme: light dark;
  --bg: #0f1420;
  --fg: #eef1f6;
  --muted: #9aa4b2;
  --accent: #4da6ff;
  --card-bg: #171d2b;
  --border: #262e40;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
}

header {
  padding: 1.5rem 2rem 0;
  border-bottom: 1px solid var(--border);
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
}

nav#tabs {
  display: flex;
  gap: 0.5rem;
}

.tab-link {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-link:hover {
  color: var(--fg);
}

.tab-link.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.project-card img {
  max-width: 100%;
  border-radius: 4px;
}