:root {
  --ink: #1d2327;
  --muted: #5b646b;
  --bg: #faf8f4;
  --accent: #2f6f62;
  --line: #e4dfd6;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 18px/1.65 "Source Serif 4", Georgia, serif;
}
a { color: var(--accent); }
nav {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 860px; margin: 0 auto; padding: 20px 16px;
  font-family: "Inter", system-ui, sans-serif; font-size: 15px;
}
nav .brand { font-weight: 700; text-decoration: none; color: var(--ink); letter-spacing: .02em; }
nav .links a { margin-left: 20px; text-decoration: none; color: var(--muted); }
nav .links a:hover, nav .links a[aria-current] { color: var(--accent); }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 80px; }
h1, h2, h3 { font-family: "Inter", system-ui, sans-serif; line-height: 1.2; }
h1 { font-size: 2.4rem; margin: 0 0 .3em; }
h2 { font-size: 1.4rem; margin-top: 2.2em; padding-top: 1em; border-top: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 1.6em 0 .3em; }
.subtitle { color: var(--muted); font-style: italic; margin-top: 0; }

/* Landing */
.hero { text-align: center; padding-top: 40px; }
.hero img {
  width: 220px; height: 220px; border-radius: 50%; object-fit: cover;
  border: 4px solid #fff; box-shadow: 0 6px 24px rgba(0,0,0,.12);
}
.hero h1 { font-size: 3rem; margin-top: 28px; }
.hero p { max-width: 560px; margin: 0 auto 32px; color: var(--muted); }
.buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px;
  font: 600 15px "Inter", system-ui, sans-serif; text-decoration: none;
  border: 2px solid var(--accent);
}
.btn.primary { background: var(--accent); color: #fff; }

.bio-photo { float: right; width: 180px; border-radius: 8px; margin: 0 0 16px 24px; }
ul { padding-left: 1.2em; }
li { margin-bottom: .5em; }
footer { text-align: center; color: var(--muted); font: 14px "Inter", system-ui, sans-serif; padding: 24px 16px 40px; }

@media (max-width: 560px) {
  .hero h1 { font-size: 2.2rem; }
  .bio-photo { float: none; display: block; margin: 0 auto 20px; }
  nav .links a { margin-left: 14px; }
}