body {
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem 3rem;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

body > p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: 0.3rem;
  margin-bottom: 1.5rem;
}

section {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

label,
.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  font-family: var(--font-family-mono);
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: 0.8rem;
  min-height: 100px;
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: var(--color-accent-1);
}

.warning {
  color: var(--color-error);
  min-height: 1.2em;
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.diff-summary {
  color: var(--color-text-subtle);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

.diff-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: var(--font-family-mono);
  font-size: 0.85rem;
  overflow-x: auto;
}

.diff-line {
  white-space: pre;
  padding: 0.05rem 0.75rem;
}

.diff-line.diff-equal {
  color: var(--color-text-subtle);
}

.diff-line.diff-add {
  background: rgba(74, 222, 128, 0.15);
  color: #4ade80;
}

.diff-line.diff-remove {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-error);
}