:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --line: #e2e2e2;
  --accent: #0a5c36;
  --bg: #ffffff;
}

* { box-sizing: border-box; }

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

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.site-header .brand {
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}

.site-header nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-header nav a:hover { color: var(--accent); }

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.content h1 { font-size: 1.9rem; margin-top: 0; }
.content h2 { font-size: 1.3rem; margin-top: 2rem; }
.content h3 { font-size: 1.05rem; color: var(--muted); }

.post-date { color: var(--muted); font-size: 0.9rem; }

.blog-index { list-style: none; padding: 0; }
.blog-index li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
}

form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

form input, form textarea {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  font: inherit;
}

form button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.site-footer a { color: var(--muted); }
.fine-print { margin-top: 0.5rem; }