:root {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #ffffff;
  --accent: #2b6cb0;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
}

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

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-header a {
  color: var(--accent);
  text-decoration: none;
}

form.inline {
  display: inline;
}

.site-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--muted);
}

.messages {
  list-style: none;
  padding: 0;
}

.messages li {
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  background: #f1f5f9;
  margin-bottom: 0.5rem;
}

button {
  cursor: pointer;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 0.95rem;
}