*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

:root {
  --teal: #0d9488;
  --teal-dark: #0f766e;
  --teal-soft: #ccfbf1;
  --cyan: #0891b2;
  --cyan-soft: #cffafe;
  --green: #16a34a;
  --amber: #b45309;
  --rose: #be123c;
  --indigo: #4f46e5;
  --ink: #0f172a;
  --muted: #475569;
  --subtle: #64748b;
  --faint: #94a3b8;
  --line: #dbe4ea;
  --line-soft: #e7edf2;
  --canvas: #f5f7f4;
  --paper: #fffdfa;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --code: #111827;
  --shadow: 0 12px 32px -24px rgba(15, 23, 42, .55), 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-strong: 0 26px 50px -34px rgba(15, 23, 42, .65), 0 12px 24px -24px rgba(13, 148, 136, .55);
  --radius: 8px;
  --radius-sm: 6px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --display: "IBM Plex Sans", "Inter", -apple-system, system-ui, sans-serif;
  --mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
  /* blended nirs4all.org x nirs4all-studio accents */
  --gradient-primary: linear-gradient(135deg, #0d9488 0%, #0891b2 100%);
  --gradient-spectral: linear-gradient(120deg, #0f766e 0%, #06b6d4 60%, #10b981 100%);
  --glow: 0 14px 28px -18px rgba(13, 148, 136, .95);
  --role-features: #0d9488;
  --role-targets: #4f46e5;
  --role-metadata: #b45309;
  --role-weights: #0891b2;
  --role-ignore: #94a3b8;
  --role-mixed: #7c3aed;
}

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    linear-gradient(180deg, #fffdfa 0, #f7f4eb 280px, #edf7f5 620px, #f8fafc 100%);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 23, 42, .032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, .028) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0, transparent 720px);
}

button, input, select, textarea { font: inherit; }
button {
  cursor: pointer;
  transition: background .16s, border-color .16s, color .16s, box-shadow .16s, transform .16s;
}
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid rgba(13, 148, 136, .35);
  outline-offset: 2px;
}
svg { width: 1em; height: 1em; }
::selection { background: rgba(13, 148, 136, .18); }

.container {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(15, 23, 42, .08);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
}

.nav-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-size: 1.04rem;
  font-weight: 700;
  margin-right: auto;
}

.brand .mark {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 8px;
  box-shadow: 0 12px 24px -16px rgba(13, 148, 136, .9);
}

.brand small {
  display: block;
  margin-top: -2px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .66rem;
  font-weight: 500;
}

.nav-note {
  color: var(--subtle);
  font-size: .82rem;
  font-weight: 600;
  white-space: nowrap;
}

.runtime {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  max-width: 520px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: rgba(255, 255, 255, .78);
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.runtime::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--faint);
  box-shadow: 0 0 0 3px rgba(100, 116, 139, .12);
}

.runtime.ok {
  color: #047857;
  border-color: rgba(16, 185, 129, .28);
  background: rgba(240, 253, 250, .86);
}
.runtime.ok::before {
  background: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, .16), 0 0 12px rgba(16, 185, 129, .55);
}
.runtime.err {
  color: var(--rose);
  border-color: rgba(190, 18, 60, .26);
  background: #fff1f2;
}
.runtime.err::before {
  background: var(--rose);
  box-shadow: 0 0 0 3px rgba(190, 18, 60, .14);
}

.workbench {
  position: relative;
  padding: 28px 0 22px;
  border-bottom: 1px solid rgba(219, 228, 234, .76);
}

.workbench::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 86px;
  opacity: .34;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0 5%, rgba(13, 148, 136, .18) 5% 5.2%, transparent 5.2% 17%, rgba(8, 145, 178, .14) 17% 17.2%, transparent 17.2% 32%, rgba(22, 163, 74, .13) 32% 32.2%, transparent 32.2% 100%),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, .12) 0 1px, transparent 1px 58px);
  mask-image: linear-gradient(180deg, #000, transparent);
}

.workbench-grid {
  display: grid;
  grid-template-columns: minmax(300px, .76fr) minmax(440px, 1.24fr);
  gap: 18px;
  align-items: stretch;
}

.has-dataset .workbench {
  padding: 16px 0;
}
.has-dataset .workbench-grid {
  grid-template-columns: minmax(260px, 330px) minmax(0, 1fr);
  align-items: start;
}

.drop-zone {
  position: relative;
  min-height: 274px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: 28px;
  border: 1px dashed rgba(13, 148, 136, .42);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .92), rgba(248, 250, 252, .86));
  box-shadow: var(--shadow);
  text-align: center;
  overflow: hidden;
}

.drop-zone::before {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 4px solid var(--teal);
  pointer-events: none;
}
.drop-zone > * { position: relative; z-index: 1; }
.drop-zone:hover, .drop-zone.drag {
  border-color: var(--teal);
  box-shadow: var(--shadow-strong);
  transform: translateY(-1px);
}
.drop-zone.drag {
  background: #f0fdfa;
  border-style: solid;
}

.drop-step { margin-bottom: 0; }
.drop-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(13, 148, 136, .16);
  border-radius: var(--radius);
  color: var(--teal-dark);
  background: var(--teal-soft);
}
.drop-icon svg { width: 26px; height: 26px; }
.drop-zone h1 {
  font-family: var(--display);
  font-size: 2.28rem;
  line-height: 1.04;
  font-weight: 700;
}
.drop-zone p:not(.eyebrow) {
  max-width: 470px;
  color: var(--muted);
  line-height: 1.65;
}
.drop-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
  margin-top: 8px;
}

.has-dataset .drop-zone {
  min-height: 152px;
  justify-items: stretch;
  align-content: start;
  text-align: left;
  padding: 18px;
}
.has-dataset .drop-icon, .has-dataset .drop-step, .has-dataset .drop-zone p:not(.eyebrow) {
  display: none;
}
.has-dataset .drop-zone h1 {
  font-size: 1.22rem;
}
.has-dataset .drop-actions {
  justify-content: flex-start;
  margin-top: 4px;
}

.primary, .secondary, .ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink);
  background: #fff;
}

.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--teal-dark), var(--cyan));
  box-shadow: 0 14px 28px -18px rgba(13, 148, 136, .95);
}
.primary:hover {
  background: linear-gradient(135deg, #0b6f68, #0e7490);
  transform: translateY(-1px);
}
.secondary, .ghost {
  border-color: var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, .82);
}
.secondary:hover, .ghost:hover {
  border-color: rgba(13, 148, 136, .38);
  color: var(--teal-dark);
  background: #fff;
  transform: translateY(-1px);
}

.summary-band {
  position: relative;
  min-width: 0;
  padding: 20px;
  border: 1px solid rgba(219, 228, 234, .92);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .9);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.summary-band::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--cyan), rgba(22, 163, 74, .84));
}

.summary-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}
.summary-head h2 {
  font-family: var(--display);
  font-size: 1.34rem;
  line-height: 1.2;
  font-weight: 700;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 6px;
  color: var(--teal-dark);
  font-size: .68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .14em;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.kpis {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}
.kpi {
  min-width: 0;
  padding: 10px 11px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, #fff, #fbfdfe);
  position: relative;
  overflow: hidden;
}
.kpi::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--accent, var(--teal));
}
.k-label {
  margin-bottom: 4px;
  color: var(--subtle);
  font-size: .64rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.k-val {
  color: var(--teal-dark);
  font-family: var(--display);
  font-size: 1.42rem;
  line-height: 1.05;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.k-unit {
  margin-top: 4px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.status-line {
  margin-top: 12px;
  padding: 9px 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: #f8fafc;
  font-size: .84rem;
}

.dataset-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.map-empty {
  grid-column: 1 / -1;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  color: var(--subtle);
  background: #f8fafc;
  text-align: center;
  font-size: .84rem;
}
.map-role {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fff;
}
.map-role-title {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 7px;
  color: var(--teal-dark);
  font-size: .66rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.map-role-title::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}
.map-role-items {
  display: grid;
  gap: 6px;
}
.map-chip {
  min-width: 0;
  padding: 8px;
  border: 1px solid #eef2f5;
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}
.map-chip strong {
  display: block;
  color: var(--ink);
  font-size: .84rem;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.map-chip small {
  display: block;
  margin-top: 2px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .66rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.map-chip div {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}
.map-chip span {
  display: inline-flex;
  max-width: 100%;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: #ecfeff;
  color: #155e75;
  font-family: var(--mono);
  font-size: .64rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dataset-alerts {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}
.dataset-alert {
  padding: 11px;
  border: 1px solid rgba(180, 83, 9, .25);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius-sm);
  background: #fffbeb;
}
.refusal-alert {
  border-color: rgba(190, 18, 60, .22);
  border-left-color: var(--rose);
  background: #fff1f2;
}
.alert-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.alert-head strong {
  margin-right: auto;
  color: #92400e;
  font-size: .86rem;
}
.refusal-alert .alert-head strong { color: var(--rose); }
.alert-action {
  min-height: 30px;
  padding: 5px 10px;
  font-size: .76rem;
  background: #fff;
}
.alert-list {
  display: grid;
  gap: 5px;
}
.alert-row {
  display: grid;
  grid-template-columns: minmax(120px, 1.2fr) minmax(110px, 1fr) minmax(90px, .7fr) minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  color: var(--muted);
  font-size: .73rem;
}
.alert-row span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.alert-path {
  color: #92400e;
  font-family: var(--mono);
  font-weight: 700;
}

.main-grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 18px 0 64px;
}
.left-rail, .viz-stack {
  display: grid;
  gap: 18px;
  min-width: 0;
}
.left-rail {
  position: sticky;
  top: 82px;
}

.panel {
  position: relative;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
  scroll-margin-top: 86px;
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--cyan), transparent);
  z-index: 1;
}
.panel-head {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 14px 15px 12px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, #fff, #f8fafc);
}
.panel-head h3 {
  margin-right: auto;
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 700;
}
.step {
  width: 24px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  color: #fff;
  background: var(--teal-dark);
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 23px;
  max-width: 100%;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: var(--surface-soft);
  font-family: var(--mono);
  font-size: .7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pill.ok {
  color: #047857;
  border-color: rgba(16, 185, 129, .28);
  background: #ecfdf5;
}
.pill.warn {
  color: #92400e;
  border-color: rgba(180, 83, 9, .28);
  background: #fffbeb;
}
.pill.err {
  color: var(--rose);
  border-color: rgba(190, 18, 60, .25);
  background: #fff1f2;
}

.icon-btn {
  width: 32px;
  height: 32px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: #fff;
}
.icon-btn:hover:not(:disabled) {
  color: var(--teal-dark);
  border-color: rgba(13, 148, 136, .38);
  background: #f0fdfa;
  transform: translateY(-1px);
}
.icon-btn:disabled {
  opacity: .42;
  cursor: not-allowed;
}
.icon-btn svg { width: 16px; height: 16px; }

.spec-head { gap: 8px; }
.spec-actions {
  display: inline-flex;
  gap: 6px;
  margin-left: auto;
}
.spec-head h3 { margin-right: 0; }

.file-list, .decision-list {
  display: grid;
  gap: 8px;
  max-height: 520px;
  padding: 10px;
  overflow: auto;
}
.file-row {
  display: grid;
  gap: 6px;
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fff;
}
.file-row:hover {
  border-color: rgba(13, 148, 136, .3);
  box-shadow: 0 12px 24px -22px rgba(13, 148, 136, .75);
}
.file-top {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.file-name {
  min-width: 0;
  margin-right: auto;
  font-size: .9rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-meta {
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .7rem;
}
.file-probe {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 8px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .67rem;
  line-height: 1.35;
}
.file-probe span {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.probe-format {
  color: var(--teal-dark);
  font-weight: 800;
}
.probe-error {
  color: var(--amber);
  font-weight: 800;
}
.sidecars {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.sidecar {
  display: inline-flex;
  max-width: 100%;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--subtle);
  background: #f8fafc;
  font-family: var(--mono);
  font-size: .66rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidecar.present {
  color: #047857;
  border-color: rgba(16, 185, 129, .22);
  background: #ecfdf5;
}
.sidecar.missing {
  color: var(--rose);
  border-color: rgba(190, 18, 60, .22);
  background: #fff1f2;
}

.decision {
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fff;
}
.decision strong {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
  font-size: .86rem;
}
.decision p {
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.45;
}
.warn-decision {
  border-color: rgba(180, 83, 9, .25);
  background: #fffbeb;
}
.evidence-block {
  background: #fbfdfe;
}
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-top: 7px;
}
.evidence-chip, .evidence-row {
  min-width: 0;
  padding: 7px;
  border: 1px solid #edf2f7;
  border-radius: var(--radius-sm);
  background: #fff;
}
.evidence-chip strong {
  display: block;
  margin: 0;
  font-size: .74rem;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.evidence-chip span {
  display: block;
  margin-top: 3px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .63rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.evidence-list {
  display: grid;
  gap: 6px;
  margin-top: 7px;
}
.evidence-row {
  display: grid;
  gap: 2px;
}
.evidence-row span {
  color: var(--teal-dark);
  font-weight: 800;
  font-size: .7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.evidence-row small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: .63rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}
.reader-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  max-height: 108px;
  margin-top: 8px;
  overflow: auto;
}
.reader-tags span {
  display: inline-flex;
  max-width: 100%;
  padding: 2px 6px;
  border: 1px solid rgba(13, 148, 136, .14);
  border-radius: var(--radius-sm);
  color: var(--teal-dark);
  background: #f0fdfa;
  font-family: var(--mono);
  font-size: .62rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.viz-panel {
  box-shadow: var(--shadow-strong);
}
.viz-head {
  flex-wrap: wrap;
  gap: 10px;
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.tab {
  min-height: 30px;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: #fff;
  font-size: .78rem;
  font-weight: 800;
}
.tab:hover {
  color: var(--teal-dark);
  border-color: rgba(13, 148, 136, .36);
  background: #f0fdfa;
}
.tab.active {
  color: #fff;
  border-color: transparent;
  background: var(--teal-dark);
  box-shadow: 0 12px 22px -17px rgba(13, 148, 136, .95);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 15px;
  border-bottom: 1px solid var(--line-soft);
  background: #f8fafc;
}
.toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: .79rem;
  font-weight: 800;
}
select, input[type="text"], textarea {
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: #fff;
  padding: 6px 8px;
  transition: border-color .16s, box-shadow .16s;
}
select:focus, input[type="text"]:focus, textarea:focus {
  border-color: rgba(13, 148, 136, .48);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, .08);
}
select { max-width: 220px; }
.range-label { margin-left: auto; }
input[type="range"] {
  min-width: 132px;
  accent-color: var(--teal);
}

.canvas-wrap {
  position: relative;
  width: 100%;
  height: 462px;
  padding: 10px;
  background:
    linear-gradient(180deg, #fff, #fbfdfe),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, .04) 0 1px, transparent 1px 56px);
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-sm);
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(219, 228, 234, .94);
}
.readout {
  position: absolute;
  left: 18px;
  top: 18px;
  display: none;
  pointer-events: none;
  max-width: min(420px, calc(100% - 36px));
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: #fff;
  background: rgba(17, 24, 39, .92);
  box-shadow: var(--shadow-strong);
  font-family: var(--mono);
  font-size: .7rem;
}
.readout.on { display: block; }
.legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  min-height: 42px;
  padding: 10px 15px 13px;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  background: #f8fafc;
  font-size: .77rem;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.sw {
  width: 14px;
  height: 3px;
  display: inline-block;
  border-radius: 2px;
  background: var(--teal);
}

.spec-form {
  display: grid;
  gap: 14px;
  padding: 14px;
}
.spec-overview {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}
.spec-stat {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fff;
}
.spec-stat span {
  display: block;
  color: var(--teal-dark);
  font-size: .63rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.spec-stat strong {
  display: block;
  margin-top: 4px;
  font-family: var(--display);
  font-size: 1rem;
  line-height: 1.18;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.spec-stat small {
  display: block;
  margin-top: 3px;
  color: var(--subtle);
  font-family: var(--mono);
  font-size: .66rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.spec-section {
  display: grid;
  gap: 12px;
  padding: 13px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fbfdfe;
}
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title h4 {
  font-family: var(--display);
  font-size: .98rem;
  font-weight: 700;
}
.section-title .compact {
  min-height: 30px;
  margin-left: auto;
  padding: 5px 10px;
  font-size: .76rem;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}
.field {
  display: grid;
  gap: 5px;
  min-width: 0;
}
.field label {
  color: var(--subtle);
  font-size: .66rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .09em;
}
.field input, .field select { width: 100%; }
.spec-form select { max-width: none; }
.wide-field { grid-column: 1 / -1; }

.source-list {
  display: grid;
  gap: 10px;
}
.source-row {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}
.source-title {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.source-title > div {
  min-width: 0;
  margin-right: auto;
}
.source-title strong {
  display: block;
  font-size: .94rem;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.source-title span {
  display: block;
  color: var(--subtle);
  font-size: .74rem;
}
.source-remove {
  width: 29px;
  height: 29px;
}
.source-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.source-chips span {
  display: inline-flex;
  max-width: 100%;
  padding: 2px 6px;
  border: 1px solid rgba(13, 148, 136, .14);
  border-radius: var(--radius-sm);
  color: var(--teal-dark);
  background: #f0fdfa;
  font-family: var(--mono);
  font-size: .64rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.source-fields, .advanced-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  align-items: end;
}
.source-row .wide { grid-column: span 2; }
.source-advanced {
  border-top: 1px solid var(--line-soft);
  padding-top: 8px;
}
.source-advanced summary {
  display: inline-flex;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 800;
  cursor: pointer;
}
.source-advanced[open] summary {
  margin-bottom: 10px;
  color: var(--teal-dark);
}
textarea {
  width: 100%;
  min-height: 96px;
  resize: vertical;
  font-family: var(--mono);
  font-size: .77rem;
  line-height: 1.5;
}
.json-editor { min-height: 236px; }

.empty {
  padding: 22px 12px;
  color: var(--subtle);
  text-align: center;
  font-size: .86rem;
}
.drag-veil {
  position: fixed;
  inset: 0;
  z-index: 19;
  pointer-events: none;
  background: rgba(13, 148, 136, .08);
  border: 4px solid rgba(13, 148, 136, .24);
}

@media (max-width: 1100px) {
  .left-rail { position: static; }
  .main-grid {
    grid-template-columns: 1fr;
  }
  .left-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .workbench-grid, .has-dataset .workbench-grid {
    grid-template-columns: 1fr;
  }
  .kpis, .dataset-map, .spec-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .alert-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .form-grid, .source-fields, .advanced-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .source-row .wide {
    grid-column: auto;
  }
  .range-label {
    margin-left: 0;
  }
  .canvas-wrap {
    height: 390px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 24px, 1240px);
  }
  .nav-inner {
    min-height: 62px;
    padding: 9px 0;
    flex-wrap: wrap;
    gap: 8px 12px;
  }
  .brand small, .nav-note {
    display: none;
  }
  .runtime {
    width: 100%;
    max-width: none;
    justify-content: center;
    white-space: normal;
    overflow-wrap: anywhere;
    font-size: .68rem;
  }
  .workbench {
    padding-top: 18px;
  }
  .drop-zone {
    min-height: 230px;
    padding: 20px 16px;
  }
  .drop-zone h1 {
    font-size: 1.86rem;
  }
  .summary-head, .alert-head, .section-title {
    align-items: stretch;
    flex-direction: column;
  }
  .alert-action, .section-title .compact {
    width: 100%;
    justify-content: center;
    margin-left: 0;
  }
  .kpis, .dataset-map, .spec-overview, .left-rail, .form-grid, .source-fields, .advanced-grid, .alert-row {
    grid-template-columns: 1fr;
  }
  .panel {
    scroll-margin-top: 118px;
  }
  .toolbar label, .toolbar select {
    width: 100%;
  }
  select {
    max-width: none;
  }
  input[type="range"] {
    width: 100%;
  }
  .canvas-wrap {
    height: 330px;
  }
}

/* ====================================================================== */
/* Iterative builder                                                      */
/* ====================================================================== */

/* mode visibility */
.builder-only { display: none; }
body.mode-builder .builder-only { display: block; }
body.mode-builder .oneshot-only { display: none; }

/* nav mode toggle */
.mode-toggle {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .7);
  backdrop-filter: blur(8px);
}
.mode-toggle button {
  padding: 5px 14px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--subtle);
  font-size: .82rem;
  font-weight: 600;
}
.mode-toggle button:hover { color: var(--teal-dark); }
.mode-toggle button.active {
  color: #fff;
  background: var(--gradient-primary);
  box-shadow: var(--glow);
}

/* proposal cards */
.proposal-groups { display: grid; gap: 14px; }
.proposal-group { display: grid; gap: 10px; }
.proposal-group-title {
  font-family: var(--mono);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--subtle);
}
.proposal-card {
  position: relative;
  padding: 14px 16px 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .16s, box-shadow .16s, border-color .16s;
}
.proposal-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--faint);
}
.proposal-card.ok::before { background: var(--gradient-spectral); }
.proposal-card.warn::before { background: var(--amber); }
.proposal-card.ambiguous { border-style: dashed; }
.proposal-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-strong); border-color: rgba(13, 148, 136, .38); }
.proposal-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.proposal-title { font-size: .82rem; color: var(--muted); }
.proposal-title strong { color: var(--ink); font-family: var(--mono); }
.proposal-value {
  margin: 6px 0 2px;
  font-family: var(--display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--teal-dark);
}
.proposal-why { font-size: .82rem; color: var(--subtle); line-height: 1.5; }
.proposal-alts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.alt-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: .78rem;
  font-weight: 600;
}
.alt-chip:hover { border-color: var(--teal); color: var(--teal-dark); background: var(--teal-soft); }
.alt-chip .alt-score { font-family: var(--mono); font-size: .68rem; color: var(--faint); }
.proposal-actions { display: flex; align-items: center; justify-content: flex-end; gap: 10px; margin-top: 10px; }
.proposal-actions .override {
  margin-right: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .66rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--faint);
}
.proposal-actions .override select { min-height: 30px; padding: 4px 8px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
button.compact { padding: 7px 14px; font-size: .82rem; }

.confirmed-list { margin-top: 6px; border-top: 1px solid var(--line-soft); padding-top: 8px; }
.confirmed-list summary { cursor: pointer; font-size: .78rem; font-weight: 700; color: var(--subtle); }
.confirmed-row { display: flex; justify-content: space-between; gap: 8px; font-size: .78rem; color: var(--muted); padding: 4px 0; }
.confirmed-row .link { border: 0; background: none; color: var(--cyan); font-size: .76rem; padding: 0; }

/* step timeline */
.step-list { display: grid; gap: 8px; }
.step-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--line-soft); border-radius: var(--radius-sm); background: var(--surface); }
.step-row.done { border-color: rgba(13, 148, 136, .3); background: linear-gradient(180deg, #fff, #f6fdfb); }
.step-body { flex: 1; min-width: 0; }
.step-files { font-size: .82rem; font-weight: 600; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.step-meta { font-size: .72rem; color: var(--subtle); }

/* dataset so far */
.sofar { display: grid; gap: 6px; }
.sofar-row { display: flex; align-items: center; gap: 8px; font-size: .82rem; }
.sofar-name { flex: 1; min-width: 0; font-family: var(--mono); font-size: .76rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.role-tag { padding: 2px 8px; border-radius: 999px; font-size: .68rem; font-weight: 700; color: #fff; }
.role-features { background: var(--role-features); }
.role-targets { background: var(--role-targets); }
.role-metadata { background: var(--role-metadata); }
.role-weights { background: var(--role-weights); }
.role-ignore { background: var(--role-ignore); }
.role-mixed { background: var(--role-mixed); }
.map-chip { padding: 2px 7px; border-radius: 999px; border: 1px solid var(--line); font-size: .68rem; color: var(--subtle); }
.map-chip.join { color: var(--indigo); border-color: rgba(79, 70, 229, .3); }
.sofar-foot { font-size: .72rem; color: var(--subtle); margin-top: 2px; }

/* materialized preview */
.preview { display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.preview-block { padding: 10px 12px; border: 1px solid var(--line-soft); border-radius: var(--radius-sm); background: linear-gradient(180deg, #fff, #fbfdfe); }
.preview-part { font-family: var(--mono); font-size: .7rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; color: var(--teal-dark); }
.preview-stat { font-size: .82rem; color: var(--muted); }
.preview-stat strong { color: var(--ink); font-size: 1.1rem; font-family: var(--display); }
.preview-foot { grid-column: 1 / -1; font-size: .72rem; color: var(--subtle); }

.empty.ok { color: var(--teal-dark); }
.empty.warn { color: var(--amber); }
.empty.err { color: var(--rose); }

@media (max-width: 1100px) {
  .mode-toggle { order: 3; }
}