:root {
  --bg: #f3f4f7;
  --fg: #1b1e27;
  --muted: #5d6474;
  --line: #d9dce4;
  --panel: #ffffff;
  --accent: #2f6f6a;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

main {
  max-width: 480px;
  margin: 64px auto;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}

h1 { font-size: 24px; margin: 0 0 12px; }
h2 { font-size: 16px; margin: 24px 0 8px; }
p { color: var(--muted); }
code { font-family: ui-monospace, Menlo, monospace; font-size: 13px; }

label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 4px; }

input[type="text"] {
  width: 100%;
  box-sizing: border-box;
  padding: 7px 10px;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

a.button, input[type="submit"], button {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.flash { padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); }
.flash.alert { color: #a12b2b; }