:root {
  --bg: #f5f1e8;
  --paper: rgba(255, 251, 245, 0.92);
  --ink: #1f1a17;
  --muted: #685f57;
  --line: rgba(48, 37, 28, 0.12);
  --accent: #b65a2a;
  --accent-deep: #7f3817;
  --accent-soft: #f1d3bc;
  --shadow: 0 20px 50px rgba(61, 41, 25, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  background:
    radial-gradient(circle at top left, rgba(255, 209, 176, 0.6), transparent 34%),
    linear-gradient(180deg, #f9f4ec 0%, #efe4d3 100%);
}

.page-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 72px;
}

.hero {
  padding: 16px 6px 10px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  color: var(--accent-deep);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 0.95;
}

.hero-copy {
  max-width: 68ch;
  margin: 18px 0 0;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--muted);
}

.panel {
  margin-top: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel-copy,
.status {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.badge,
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
}

.badge {
  padding: 6px 12px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.82rem;
}

.badge--muted {
  background: rgba(31, 26, 23, 0.08);
  color: var(--muted);
}

.planner-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: 14px;
  margin-top: 18px;
}

.planner-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.95rem;
}

.planner-form input {
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid rgba(127, 56, 23, 0.18);
  border-radius: 14px;
  font: inherit;
  background: rgba(255, 255, 255, 0.92);
}

.planner-form button {
  align-self: end;
  min-height: 48px;
  padding: 0 20px;
  border: 0;
  border-radius: 14px;
  font: inherit;
  color: #fff8f2;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  cursor: pointer;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.metric-card {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.metric-label {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.metric-value {
  margin-top: 10px;
  font-size: 1.7rem;
  color: var(--accent-deep);
}

.details-stack {
  margin-top: 20px;
}

.detail-section {
  margin-top: 22px;
}

.detail-section h3 {
  margin-bottom: 12px;
}

.stack {
  display: grid;
  gap: 12px;
}

.result-block,
.diff-card {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  line-height: 1.65;
  overflow: auto;
}

.result-block {
  white-space: pre-wrap;
  word-break: break-word;
}

.diff-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.diff-pane {
  margin: 0;
  padding: 14px;
  border-radius: 14px;
  background: #241f1b;
  color: #f8efe5;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.86rem;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
}

.change-list {
  margin: 12px 0 0;
  padding-left: 20px;
}

.empty-state {
  margin: 0;
  color: var(--muted);
}

.raw-panel {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.raw-panel summary {
  cursor: pointer;
  color: var(--accent-deep);
  font-weight: 600;
}

.output {
  min-height: 220px;
  margin: 14px 0 0;
  padding: 18px;
  overflow: auto;
  border-radius: 18px;
  background: #221d19;
  color: #f8efe5;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.88rem;
}

.panel--grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.info-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.info-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 920px) {
  .planner-form,
  .panel--grid,
  .diff-columns {
    grid-template-columns: 1fr;
  }
}