:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #111111;
  --text-soft: #3a3a3c;
  --muted: #6e6e73;
  --line: rgba(17, 17, 17, 0.1);
  --line-strong: rgba(17, 17, 17, 0.16);
  --accent: #0071e3;
  --accent-strong: #0058b0;
  --accent-soft: rgba(0, 113, 227, 0.08);
  --result-bg: #111214;
  --result-text: #f5f5f7;
  --radius-sm: 14px;
  --radius-md: 20px;
  --content-width: 1440px;
  --ease: 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(245, 245, 247, 0.94)),
    var(--bg);
  color: var(--text);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "SF Pro Display",
    "SF Pro Text",
    "Helvetica Neue",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 36px 28px 96px;
}

.page.narrow {
  max-width: 800px;
}

.masthead {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 48px;
  align-items: start;
  padding: 8px 0 40px;
}

.brand-lockup,
.workflow-nav,
.disclaimer,
.status-strip,
.workspace-section {
  animation: fade-up 640ms var(--ease) both;
}

.eyebrow,
.label,
.section-index {
  margin: 0;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

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

h1 {
  max-width: 10ch;
  margin-top: 14px;
  font-size: clamp(4rem, 9vw, 7.5rem);
  line-height: 0.92;
  letter-spacing: -0.075em;
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 3.8vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.05em;
  font-weight: 650;
}

h3 {
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.lede {
  max-width: 42rem;
  margin-top: 18px;
  font-size: 1.15rem;
  line-height: 1.62;
  color: var(--text-soft);
}

.disclaimer {
  position: relative;
  display: grid;
  gap: 6px;
  grid-column: 1 / -1;
  width: 100%;
  margin-top: -18px;
  padding: 14px 16px 14px 18px;
  border: 1px solid rgba(0, 113, 227, 0.28);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(90deg, rgba(0, 113, 227, 0.14), rgba(255, 255, 255, 0.72)),
    var(--accent-soft);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.06);
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.5;
}

.disclaimer-label {
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.workflow-nav {
  align-self: center;
  display: grid;
  gap: 14px;
  justify-items: end;
}

.workflow-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text);
  text-decoration: none;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  font-weight: 560;
  transition: color var(--ease), transform var(--ease), opacity var(--ease);
}

.workflow-nav a::before {
  content: "";
  width: 24px;
  height: 1px;
  margin-right: 14px;
  background: var(--line-strong);
  transition: width var(--ease), background var(--ease);
}

.workflow-nav a:hover {
  color: var(--accent-strong);
  transform: translateX(-4px);
}

.workflow-nav a:hover::before {
  width: 44px;
  background: var(--accent);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding: 18px 0 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-item {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.status-item strong {
  font-size: 0.98rem;
  line-height: 1.45;
  font-weight: 560;
  word-break: break-word;
}

.workspace-section {
  display: grid;
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
  gap: 40px;
  padding: 54px 0;
  border-top: 1px solid var(--line);
}

.workspace-section-last {
  border-bottom: 1px solid var(--line);
}

.section-rail {
  position: sticky;
  top: 20px;
  align-self: start;
  display: grid;
  gap: 14px;
}

.section-index {
  color: var(--accent);
}

.section-note {
  max-width: 26ch;
  color: var(--muted);
  line-height: 1.6;
}

.section-body {
  display: grid;
  gap: 20px;
  min-width: 0;
}

.control-row,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 28px;
}

.content-group {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.debug-panel {
  display: grid;
  gap: 12px;
}

.content-group + .content-group {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.group-heading {
  display: grid;
  gap: 6px;
}

.document-tools {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.document-tools .field {
  min-width: 0;
}

.muted {
  color: var(--muted);
}

.summary-line {
  min-height: 1.5em;
  padding-bottom: 4px;
}

.stack {
  display: grid;
  gap: 20px;
}

.advanced-config {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.55);
  padding: 18px 20px;
}

.advanced-config summary {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.advanced-config-body {
  margin-top: 18px;
}

.advanced-group {
  display: grid;
  gap: 16px;
  padding-top: 4px;
}

.advanced-group + .advanced-group {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.field-note {
  align-content: start;
}

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

.form-grid-narrow {
  grid-template-columns: 1.15fr 0.85fr;
}

.field {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.field span {
  font-size: 0.9rem;
  line-height: 1.3;
  font-weight: 560;
  color: var(--text-soft);
}

.compact-field {
  min-width: 220px;
}

input,
textarea,
select,
button {
  font: inherit;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  padding: 14px 16px;
  transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--line-strong);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(0, 113, 227, 0.44);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
  background: var(--surface);
}

textarea {
  min-height: 360px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  line-height: 1.58;
}

.short-textarea {
  min-height: 220px;
}

button {
  min-height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: #2f3136;
  color: white;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  cursor: pointer;
  transition: transform var(--ease), background var(--ease), opacity var(--ease), box-shadow var(--ease);
}

button:hover {
  transform: translateY(-1px);
}

button.primary {
  background: linear-gradient(135deg, var(--accent), #1f8fff);
  box-shadow: 0 10px 24px rgba(0, 113, 227, 0.18);
}

button.primary:hover {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 12px 28px rgba(0, 113, 227, 0.24);
}

button.secondary {
  background: #52555c;
}

button.tertiary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line-strong);
}

.document-list,
.coverage-groups,
.mapping-list {
  display: grid;
}

.document-list,
.coverage-groups {
  max-height: 560px;
  overflow: auto;
}

.doc-item,
.coverage-group,
.mapping-item {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease), transform var(--ease);
}

.doc-item:hover,
.coverage-group:hover {
  transform: translateX(4px);
}

.doc-item {
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: start;
}

.doc-item input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

.doc-item code,
.mapping-item p,
.coverage-group strong {
  color: var(--text-soft);
}

.empty-state {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.result {
  margin: 6px 0 0;
  min-height: 120px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--result-bg);
  color: var(--result-text);
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.55;
}

.result-console {
  max-height: 320px;
  overflow: auto;
}

.card {
  display: grid;
  gap: 20px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.84);
}

.callback-grid {
  display: grid;
  gap: 24px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--text);
  color: white;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.02em;
  transition: transform var(--ease), background var(--ease), opacity var(--ease);
}

.button-link:hover {
  transform: translateY(-1px);
}

.mapping-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.mapping-item {
  padding-top: 0;
}

.mapping-note {
  max-width: 54rem;
  line-height: 1.6;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .masthead,
  .workspace-section,
  .two-column,
  .mapping-list {
    grid-template-columns: 1fr;
  }

  .workflow-nav {
    justify-items: start;
  }

  .content-group + .content-group {
    padding-left: 0;
    border-left: 0;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }

  .section-rail {
    position: static;
  }
}

@media (max-width: 760px) {
  .page {
    padding: 20px 16px 64px;
  }

  .masthead {
    gap: 28px;
    padding: 8px 0 32px;
  }

  h1 {
    max-width: none;
    font-size: clamp(3rem, 18vw, 4.6rem);
  }

  .status-strip,
  .form-grid,
  .form-grid-narrow,
  .document-tools {
    grid-template-columns: 1fr;
  }

  .workspace-section {
    gap: 24px;
    padding: 38px 0;
  }

  .control-row,
  .inline-actions {
    flex-direction: column;
    align-items: stretch;
  }

  button {
    width: 100%;
  }
}