:root {
  color-scheme: light;
  --bg: #f4efe7;
  --surface: #fffdf8;
  --surface-strong: #f7f1e8;
  --text: #1b1a17;
  --muted: #645f57;
  --line: #d5c6b3;
  --accent: #a9471f;
  --accent-strong: #7d2f13;
  --shadow: rgba(45, 30, 12, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 208, 122, 0.28), transparent 35%),
    linear-gradient(180deg, #faf5ee 0%, var(--bg) 100%);
  color: var(--text);
}

code,
pre,
textarea,
input {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.page {
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 20px 56px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--accent);
}

h1,
h2 {
  margin: 0 0 12px;
}

.lede,
.note {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.55;
}

.card {
  background: color-mix(in srgb, var(--surface) 92%, white 8%);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 16px 36px var(--shadow);
  margin-bottom: 20px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.full {
  display: block;
  margin-top: 16px;
}

label span,
.label,
legend {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}

input,
textarea,
button {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  padding: 12px 14px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

textarea {
  resize: vertical;
}

button {
  width: auto;
  min-width: 180px;
  border: none;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #fff7f1;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(169, 71, 31, 0.22);
}

button:disabled {
  cursor: not-allowed;
  background: #bbb2a7;
  box-shadow: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.mode-row {
  margin: 18px 0 0;
  padding: 0;
  border: none;
}

.choice {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
  color: var(--muted);
}

.choice input {
  width: auto;
  margin: 0;
}

.info-row {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 18px;
}

pre {
  margin: 0;
  padding: 16px;
  background: #171411;
  color: #f8ead7;
  border-radius: 14px;
  overflow: auto;
  min-height: 160px;
  line-height: 1.45;
}

.callback-page {
  max-width: 760px;
}

@media (max-width: 720px) {
  .page {
    padding: 24px 14px 40px;
  }

  .card {
    padding: 18px;
    border-radius: 16px;
  }

  button {
    width: 100%;
  }
}