:root {
  --bg: #f3f7fc;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --text: #14253f;
  --muted: #5d708a;
  --line: #d6e2f1;
  --primary: #1767ff;
  --primary-soft: #eaf2ff;
  --ok: #1a8c55;
  --warn: #b87608;
  --danger: #cc4a4a;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 14px 34px rgba(15, 23, 42, 0.08);
  --app-shell-max: 1280px;
  --rail-divider-color: #dce6f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Noto Sans", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #d9e6ff 0%, var(--bg) 45%);
}

a {
  color: #2359b5;
}

.layout {
  margin: 1rem auto 2rem;
  display: grid;
  gap: 1rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.section-intro {
  display: grid;
  gap: 0.35rem;
}

h2,
h3,
p {
  margin: 0;
}

.subtle,
.hint,
.footer-note {
  color: var(--muted);
}

.subtle,
.footer-note {
  line-height: 1.55;
}

.hint,
.footer-note {
  font-size: 0.84rem;
}

.panel-head {
  display: flex;
  gap: 1rem;
}

.panel-head--split {
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
}

.badge-row,
.btn-row,
.output-actions,
.toolbar-actions,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
}

.badge--ok {
  border-color: #cfe8db;
  background: #effbf4;
  color: #157346;
}

.status {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
  padding: 0.85rem 0.95rem;
}

.status strong {
  display: block;
  margin-bottom: 0.2rem;
}

.status-banner {
  margin-top: 1rem;
}

.help-panel {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.help-panel summary,
.disclosure-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.help-panel summary {
  padding: 1rem;
  font-weight: 700;
}

.help-panel summary .subtle,
.disclosure-card summary .subtle {
  font-weight: 400;
  line-height: 1.45;
}

.help-panel summary::-webkit-details-marker,
.disclosure-card summary::-webkit-details-marker {
  display: none;
}

.help-body {
  display: grid;
  gap: 0.9rem;
  padding: 0 1rem 1rem;
}

.help-grid,
.quick-grid,
.status-grid,
.mapping-grid,
.toolbar-grid {
  display: grid;
  gap: 0.85rem;
}

.quick-grid,
.mapping-grid {
  align-items: start;
}

.help-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.help-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fcfdff;
  padding: 0.85rem;
}

.help-card strong {
  display: block;
  margin-bottom: 0.4rem;
}

.quick-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.status-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0.95rem;
}

.workspace-grid {
  display: grid;
  gap: 1rem;
}

.workspace-sidebar {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.source-panel .source-stack {
  margin-top: 0.9rem;
}

.source-stack {
  display: grid;
  gap: 1rem;
}

.source-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.95rem;
  background: var(--surface-soft);
}

.field {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
  align-content: start;
}

.field > label {
  display: flex;
  align-items: flex-end;
  min-height: 1.5rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: #203756;
}

.field--action {
  align-content: end;
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid #bdd2ea;
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  background: #ffffff;
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 140px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid #d0e2ff;
  border-color: var(--primary);
}

button {
  min-height: 44px;
  border: 1px solid #c0d3ea;
  border-radius: 12px;
  padding: 0.7rem 0.95rem;
  background: #ffffff;
  color: #193454;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover:not(:disabled),
button:focus-visible:not(:disabled) {
  background: #f3f8ff;
}

button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

button.primary:hover:not(:disabled),
button.primary:focus-visible:not(:disabled) {
  background: #0f5fe0;
}

button.soft {
  border-color: #cbdcff;
  background: var(--primary-soft);
  color: #204dab;
}

button:disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.dropzone {
  min-height: 170px;
  border: 1.5px dashed #c3d4e8;
  border-radius: 16px;
  background: #f8fbff;
  padding: 1rem;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 0.5rem;
  cursor: pointer;
}

.dropzone strong {
  font-size: 1.1rem;
  line-height: 1.4;
}

.dropzone small {
  color: var(--muted);
  line-height: 1.5;
}

.disclosure-card {
  padding: 0;
  overflow: hidden;
}

.disclosure-card summary {
  padding: 0.95rem 1rem;
  background: var(--surface-soft);
  font-weight: 700;
}

.disclosure-card summary .summary-copy {
  display: grid;
  gap: 0.18rem;
}

.disclosure-card summary .summary-copy strong {
  display: block;
}

.disclosure-card summary .summary-meta {
  display: block;
  max-width: 18rem;
  text-align: right;
}

.disclosure-card[open] summary {
  border-bottom: 1px solid var(--line);
}

.disclosure-card .panel-body {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
}

.quick-grid--sidebar {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.quick-grid > .field,
.quick-grid--sidebar > .field,
.mapping-grid > .mapping-field {
  grid-template-rows: minmax(24px, auto) minmax(44px, auto) minmax(20px, auto);
}

.quick-grid > .field > .hint,
.quick-grid--sidebar > .field > .hint,
.mapping-grid > .mapping-field > .hint {
  min-height: 20px;
}

.pill-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  background: #ffffff;
  color: #244262;
  font-size: 0.92rem;
}

.pill-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-height: 18px;
  margin: 0;
}

.mapping-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mapping-field {
  grid-template-rows: minmax(22px, auto) 44px minmax(20px, auto);
}

.spacer {
  visibility: hidden;
}

.kpi {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.kpi-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
  padding: 0.95rem;
}

.kpi-card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.8rem;
  line-height: 1;
}

#outputTextarea {
  min-height: 260px;
}

.review-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  margin-top: 0.95rem;
}

.review-tab {
  border: 0;
  border-right: 1px solid var(--line);
  border-radius: 0;
  background: #f8fbff;
  min-height: 48px;
}

.review-tab:last-child {
  border-right: 0;
}

.review-tab.active {
  background: #ffffff;
  color: #1746b8;
  box-shadow: inset 0 -3px 0 var(--primary);
}

.review-panel {
  display: none;
  margin-top: 1rem;
}

.review-panel.active {
  display: grid;
  gap: 0.95rem;
}

.toolbar-card {
  display: grid;
  gap: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
  padding: 0.95rem;
}

.toolbar-grid {
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr) minmax(0, 1fr) minmax(210px, auto);
  align-items: end;
}

.scroll-table {
  overflow: auto;
  max-height: 430px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #ffffff;
}

table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
}

#problemTable {
  min-width: 760px;
}

th,
td {
  border-bottom: 1px solid #e7eef7;
  padding: 0.7rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f8fbff;
}

td textarea {
  min-height: 84px;
}

.empty {
  padding: 1.4rem;
  text-align: center;
  color: var(--muted);
}

.level {
  display: inline-flex;
  align-items: center;
  padding: 0.24rem 0.5rem;
  border: 1px solid;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: capitalize;
}

.level.error {
  color: var(--danger);
  background: #fff3f3;
  border-color: #f1caca;
}

.level.warn {
  color: var(--warn);
  background: #fff8ea;
  border-color: #f1deb2;
}

.level.info {
  color: #2e67a0;
  background: #f2f8ff;
  border-color: #c9ddf6;
}

.row-flash {
  animation: flash-row 1.4s ease;
}

@keyframes flash-row {
  0% {
    background: #fff7c5;
  }
  100% {
    background: transparent;
  }
}

.hidden {
  display: none !important;
}

.mono {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

.tool-footer {
  margin-top: 2rem;
  padding-bottom: 1rem;
}

.tool-footer__inner {
  text-align: left;
  padding-bottom: 1rem;
}

.tool-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.9rem;
}

.tool-footer__nav a {
  color: inherit;
  text-decoration: none;
}

.tool-footer__nav a:hover,
.tool-footer__nav a:focus-visible {
  text-decoration: underline;
}

.tool-footer__meta,
.tool-footer__note {
  margin: 0 0 0.7rem;
  color: #4c5d74;
  line-height: 1.6;
}

@media (min-width: 1020px) {
  .workspace-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.95fr);
  }

  .kpi {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 1120px) {
  .help-grid,
  .quick-grid,
  .status-grid,
  .toolbar-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar-grid > .field:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .panel,
  .source-card,
  .disclosure-card .panel-body,
  .toolbar-card,
  .help-panel summary,
  .help-body {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  .panel-head--split,
  .help-panel summary,
  .disclosure-card summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .disclosure-card summary .summary-meta {
    max-width: none;
    text-align: left;
  }

  .help-grid,
  .quick-grid,
  .quick-grid--sidebar,
  .status-grid,
  .mapping-grid,
  .toolbar-grid,
  .kpi,
  .review-tabs {
    grid-template-columns: 1fr;
  }

  .btn-row,
  .output-actions,
  .toolbar-actions,
  .pill-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn-row > button,
  .output-actions > button,
  .toolbar-actions > button {
    width: 100%;
  }

  .field--action {
    align-content: stretch;
  }

  .scroll-table {
    max-height: 360px;
  }
}