:root {
  --bg: #f3efe6;
  --surface: rgba(255, 255, 255, 0.9);
  --text: #1d2b32;
  --accent: #006a6a;
  --accent-dark: #004f4f;
  --border: rgba(29, 43, 50, 0.14);
  --shadow: 0 24px 60px rgba(24, 39, 44, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 106, 106, 0.18), transparent 28%),
    linear-gradient(135deg, #f7f1e7 0%, #e7efe9 100%);
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.panel {
  width: min(100%, 720px);
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-size: 12px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
}

.lead {
  margin: 0 0 24px;
  font-size: 1.05rem;
  max-width: 52ch;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 14px 18px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.actions {
  margin-bottom: 20px;
}

.echoBox {
  margin-top: 8px;
}

.echoBox label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.95rem;
  font-weight: 700;
}

.echoRow {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

pre {
  margin: 24px 0 0;
  padding: 18px;
  border-radius: 16px;
  background: #132126;
  color: #dff6f3;
  overflow-x: auto;
}

@media (max-width: 640px) {
  .panel {
    padding: 24px;
  }

  .echoRow {
    grid-template-columns: 1fr;
  }
}