:root {
  --bg: #f4f1ea;
  --surface: #fffdf7;
  --ink: #1e2022;
  --accent: #006d77;
  --border: #d9d6ce;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #fef7dd 0%, #f4f1ea 35%, #dff5f2 100%);
  color: var(--ink);
}

.layout {
  max-width: 840px;
  margin: 2rem auto;
  padding: 1rem;
}

.backlink {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: #0f5b54;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
}

h1, h2 {
  margin-top: 0;
}

label {
  display: block;
  margin-bottom: 0.65rem;
}

input, select, button {
  padding: 0.55rem;
  margin-left: 0.4rem;
}

button {
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  margin-right: 0.35rem;
}

pre {
  background: #f1efe9;
  padding: 0.75rem;
  border-radius: 6px;
  white-space: pre-wrap;
  overflow-x: auto;
}