:root {
  --bg: #f3efe6;
  --ink: #1c2430;
  --accent: #0f6a5a;
  --panel: #fffdf8;
  --line: #d5cbb8;
  --error: #9b2c2c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #e7f2ee, transparent 40%),
    linear-gradient(180deg, #f7f2e8, #ebe4d6);
  min-height: 100vh;
}

.top {
  padding: 1.25rem 1.5rem 0.5rem;
}

.brand {
  font-family: "Fraunces", "Times New Roman", serif;
  font-size: 2rem;
  color: var(--ink);
  text-decoration: none;
}

.tagline {
  margin: 0.25rem 0 0;
  color: #4d5a66;
}

main {
  padding: 1rem 1.5rem 3rem;
  max-width: 920px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1.25rem;
}

label {
  display: block;
  margin-top: 0.85rem;
  font-weight: 600;
}

input, textarea {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  background: #fff;
  font: inherit;
}

button {
  margin-top: 1rem;
  margin-right: 0.5rem;
  padding: 0.55rem 0.9rem;
  border: 0;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

pre {
  margin-top: 1rem;
  padding: 0.75rem;
  background: #1c2430;
  color: #e8eef2;
  overflow: auto;
  max-height: 360px;
}

.error { color: var(--error); }

fieldset {
  margin-top: 1rem;
  border: 1px solid var(--line);
}

fieldset label {
  display: inline-block;
  margin-right: 1rem;
  font-weight: 500;
}

@media (max-width: 640px) {
  .brand { font-size: 1.6rem; }
  main { padding: 0.75rem; }
}