:root {
  --bg: #fbfbfa;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #2f6f4e;
  --border: #e6e6e3;
  --card: #ffffff;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181a;
    --fg: #e9e9e7;
    --muted: #9a9a97;
    --accent: #6fcf97;
    --border: #2a2d30;
    --card: #1d2023;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
header.site {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
  font-size: 18px;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  margin-left: 22px;
  font-size: 15px;
  transition: color .15s;
}
nav a:hover, nav a.active { color: var(--accent); }

/* Hero */
.hero { padding: 64px 0 32px; }
.hero h1 { font-size: 40px; line-height: 1.1; margin: 0 0 12px; }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 0 24px; }
.avatar {
  width: 96px; height: 96px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8fd3b0);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 38px; font-weight: 700; margin-bottom: 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
  margin-right: 10px;
  transition: opacity .15s;
}
.btn:hover { opacity: .88; }
.btn.ghost { background: transparent; color: var(--accent); }

/* Sections */
section { padding: 28px 0; }
h2 { font-size: 24px; margin: 0 0 18px; }
p { margin: 0 0 16px; }

/* Cards / grid */
.grid { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.06); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { font-size: 15px; color: var(--muted); margin: 0 0 12px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 12px; color: var(--accent);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 2px 10px;
}
.card a.more { font-size: 14px; color: var(--accent); text-decoration: none; font-weight: 600; }

/* Post list */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { padding: 18px 0; border-bottom: 1px solid var(--border); }
.post-list a { text-decoration: none; color: var(--fg); font-weight: 600; font-size: 18px; }
.post-list a:hover { color: var(--accent); }
.post-list .date { color: var(--muted); font-size: 14px; display: block; margin-top: 4px; }

/* Contact */
.contact-links { list-style: none; padding: 0; margin: 0; }
.contact-links li { padding: 12px 0; border-bottom: 1px solid var(--border); display: flex; gap: 12px; }
.contact-links .label { width: 90px; color: var(--muted); font-size: 15px; }
.contact-links a { color: var(--accent); text-decoration: none; }

/* Article */
article.post h1 { font-size: 32px; margin: 36px 0 6px; }
article.post .date { color: var(--muted); font-size: 15px; margin-bottom: 28px; }
article.post h2 { font-size: 22px; margin: 32px 0 12px; }
article.post pre {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px; overflow-x: auto; font-size: 14px;
}
article.post code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
article.post blockquote {
  border-left: 3px solid var(--accent); margin: 0; padding-left: 16px; color: var(--muted);
}

/* Footer */
footer.site {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}
footer.site .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--accent); }