:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9da7b3;
  --accent: #4ea1ff;
  --accent-2: #2ea043;
  --max: 880px;
}

* { box-sizing: border-box; }

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

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.site-header nav a { margin-left: 1.25rem; color: var(--muted); }
.site-header nav a:hover { color: var(--text); }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.hero h1 { font-size: 2.6rem; margin: 0 0 .25rem; }
.tagline { color: var(--accent); font-weight: 600; margin: 0 0 1rem; }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 60ch; }

.cta { margin-top: 1.75rem; display: flex; gap: .75rem; flex-wrap: wrap; }
.button {
  display: inline-block;
  padding: .6rem 1.1rem;
  border-radius: 8px;
  background: var(--accent);
  color: #04121f;
  font-weight: 600;
  border: 1px solid transparent;
}
.button:hover { text-decoration: none; filter: brightness(1.08); }
.button.secondary { background: transparent; color: var(--text); border-color: var(--border); }

section { margin-top: 3rem; }
section h2 { border-bottom: 1px solid var(--border); padding-bottom: .4rem; }

.project {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  margin: 1rem 0;
}
.project h2 { border: 0; margin: 0 0 .4rem; font-size: 1.2rem; }
.project p { color: var(--muted); margin: 0; }

.site-footer {
  max-width: var(--max);
  margin: 2rem auto 3rem;
  padding: 1.25rem 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}