:root {
  --bg: #ffffff;
  --panel: #f9f9f9;
  --text: #222222;
  --muted: #666666;
  --accent: #0066cc;
  --card: #ffffff;
  --shadow: 0 2px 6px rgba(0,0,0,.1);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans";
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1100px, 92%); margin: 0 auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--panel);
  border-bottom: 1px solid #ddd;
  z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
}

/* Nav */
.nav a {
  margin-left: 18px;
  color: var(--text);
  opacity: .9;
}
.nav a:hover { opacity: 1; }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 40px 0 8px;
  align-items: center;
}
.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow);
}
h1 {
  margin: 0 0 6px;
  font-size: clamp(28px, 4vw, 40px);
}
p {
  margin: 0 0 10px;
  color: var(--muted);
}
.cta { margin-top: 12px; display: flex; gap: 10px; }
.btn {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow);
}
.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid #ccc;
}

/* Sections */
.section { padding: 40px 0; }
h2 { margin: 0 0 16px; font-size: 22px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.card {
  background: var(--card);
  border: 1px solid #ddd;
  padding: 14px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; font-size: 18px; }
.link { display: inline-block; margin-top: 6px; }

/* Lists */
.list { list-style: none; padding: 0; margin: 0; }
.list li {
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}
.muted { color: var(--muted); font-size: 14px; }

/* Socials */
.socials { display: flex; gap: 14px; margin-top: 8px; }

/* Footer */
.site-footer {
  border-top: 1px solid #ddd;
  padding: 16px 0 30px;
  margin-top: 30px;
  color: var(--muted);
}

@media (max-width: 640px) {
  .hero { grid-template-columns: 80px 1fr; }
  .avatar { width: 80px; height: 80px; }
}