:root {
  --bg: #f2eee4;
  --paper: rgba(255, 252, 245, 0.84);
  --paper-strong: rgba(255, 255, 255, 0.72);
  --ink: #1f1a17;
  --muted: #5c554f;
  --line: rgba(31, 26, 23, 0.12);
  --accent: #c44d28;
  --accent-soft: #f0b97c;
  --shadow: 0 24px 60px rgba(40, 28, 18, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(196, 77, 40, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(92, 85, 79, 0.18), transparent 30%),
    linear-gradient(180deg, #f8f4ea 0%, var(--bg) 100%);
}

.page-shell {
  width: min(1380px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hero {
  padding: 24px 6px 32px;
  animation: rise 500ms ease-out;
}

.eyebrow,
.stage-kicker,
.field-meta {
  margin: 0;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

h2 {
  font-size: clamp(1.7rem, 2vw, 2.2rem);
  line-height: 1.05;
}

h3 {
  font-size: 1rem;
}

.subtitle,
.principle,
.stage-purpose,
.tracking-purpose,
li,
td,
th,
label,
button,
select,
textarea,
input,
p {
  line-height: 1.5;
}

.subtitle {
  max-width: 38rem;
  margin-top: 14px;
  color: var(--muted);
  font-size: 1.1rem;
}

.principle {
  max-width: 44rem;
  margin-top: 10px;
}

.layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 20px;
}

.rail,
.stack {
  display: grid;
  gap: 20px;
  align-content: start;
}

.card {
  backdrop-filter: blur(12px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.compact-card,
.detail-card,
.editor-card {
  padding: 22px;
}

.detail-header,
.editor-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.detail-grid section,
.field-card,
.preview-panel,
.rule-block {
  padding: 16px;
  border-radius: 16px;
  background: var(--paper-strong);
  border: 1px solid rgba(31, 26, 23, 0.08);
}

.full-width {
  grid-column: 1 / -1;
}

ol,
ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.rule-block + .rule-block {
  margin-top: 10px;
}

.tracking-purpose {
  margin-top: 10px;
  color: var(--muted);
}

.rule-block h3 {
  margin-bottom: 6px;
}

.rule-block p + p {
  margin-top: 8px;
}

.stage-nav {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.stage-button,
.secondary-button,
#reset-button,
#copy-button {
  border: 1px solid rgba(31, 26, 23, 0.1);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink);
  padding: 11px 14px;
  font: inherit;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.stage-button {
  width: 100%;
  text-align: left;
}

.stage-button:hover,
.stage-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible,
#reset-button:hover,
#copy-button:hover {
  transform: translateY(-1px);
  border-color: rgba(196, 77, 40, 0.45);
  outline: none;
}

.stage-button.active {
  background: linear-gradient(135deg, rgba(196, 77, 40, 0.16), rgba(240, 185, 124, 0.3));
  border-color: rgba(196, 77, 40, 0.35);
}

.editor-toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

select,
textarea,
input {
  width: 100%;
  border: 1px solid rgba(31, 26, 23, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  font: inherit;
}

select,
input {
  padding: 10px 12px;
}

textarea {
  min-height: 122px;
  padding: 12px;
  resize: vertical;
}

.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 18px;
}

.editor-form {
  display: grid;
  gap: 14px;
}

.field-header {
  margin-bottom: 10px;
}

.field-label {
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}

.field-meta {
  line-height: 1.6;
}

.slice-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
}

.slice-table th,
.slice-table td {
  padding: 6px;
  text-align: left;
  vertical-align: top;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.markdown-output {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

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

  .detail-header,
  .editor-header,
  .preview-header {
    flex-direction: column;
  }
}