:root {
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 18px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --paper: #f2f4f8;
  --paper-strong: rgba(255, 255, 255, 0.9);
  --paper-soft: rgba(245, 248, 252, 0.78);
  --document: #ffffff;
  --ink: #172230;
  --muted: #617083;
  --line: rgba(67, 92, 122, 0.18);
  --line-strong: rgba(27, 70, 124, 0.28);
  --blue: #0d4b8f;
  --blue-deep: #07325f;
  --blue-soft: #dce8f6;
  --gold: #d9af52;
  --gold-soft: #f6e8b8;
  --good: #157d64;
  --danger: #c56a45;
  --shadow: 0 28px 74px rgba(18, 34, 57, 0.12);
  --evidence-shadow: 0 14px 28px rgba(18, 34, 57, 0.07);
  --sheet-shadow: 0 34px 92px rgba(8, 28, 52, 0.16);
  --focus: rgba(13, 75, 143, 0.2);
  --highlight: rgba(13, 75, 143, 0.08);
  --hero-glow:
    radial-gradient(circle at 12% 10%, rgba(217, 175, 82, 0.14), transparent 24%),
    radial-gradient(circle at 88% 6%, rgba(13, 75, 143, 0.12), transparent 28%);
}

:root[data-theme="night"] {
  --paper: #0f1720;
  --paper-strong: rgba(19, 28, 38, 0.92);
  --paper-soft: rgba(23, 34, 48, 0.82);
  --document: #111b26;
  --ink: #eef3f7;
  --muted: #aab8c8;
  --line: rgba(173, 191, 212, 0.16);
  --line-strong: rgba(111, 155, 216, 0.28);
  --blue: #89b7f2;
  --blue-deep: #d1e4ff;
  --blue-soft: rgba(65, 103, 153, 0.22);
  --gold: #e1bf74;
  --gold-soft: rgba(217, 175, 82, 0.18);
  --good: #6ad3ac;
  --danger: #f1a27d;
  --shadow: 0 32px 86px rgba(0, 0, 0, 0.38);
  --evidence-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
  --sheet-shadow: 0 38px 102px rgba(0, 0, 0, 0.48);
  --focus: rgba(137, 183, 242, 0.24);
  --highlight: rgba(137, 183, 242, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    var(--hero-glow),
    linear-gradient(180deg, color-mix(in srgb, var(--paper) 94%, white) 0%, var(--paper) 100%);
}

body {
  margin: 0;
  background: transparent;
  color: var(--ink);
  font-family: "Aptos", "Segoe UI Variable Text", "Trebuchet MS", sans-serif;
}

h1,
h2,
h3,
h4,
summary {
  margin: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

.site-shell {
  max-width: 1760px;
  margin: 0 auto;
  padding: 24px 30px 72px;
}

.site-controls-footer {
  margin-top: var(--space-4);
}

.control-drawer,
.drawer-panel,
.stack-shell {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--paper-strong);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.status-message,
.panel-note,
.proposal-intro,
.proposal-fine-print,
.stack-meta,
.insight-summary,
.muted-copy,
.action-helper,
.choice-copy,
.empty-copy,
.text-link {
  color: var(--muted);
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  font-weight: 800;
}

.live-chip,
.stack-position,
.stack-chip,
.source-chip,
.stack-badge,
.run-status {
  border-radius: var(--radius-pill);
}

.live-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding: 11px 16px;
  border: 1px solid color-mix(in srgb, var(--blue) 18%, transparent);
  background: color-mix(in srgb, var(--blue-soft) 68%, transparent);
  font-weight: 700;
}

.live-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--good) 18%, transparent);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.status-message {
  margin: 0;
  min-height: 1.5rem;
  text-align: right;
}

.control-drawer {
  margin: 0;
  overflow: hidden;
}

.control-drawer > summary {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 20px 24px;
  list-style: none;
  cursor: pointer;
}

.control-drawer > summary::-webkit-details-marker {
  display: none;
}

.drawer-title {
  display: block;
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  font-size: 1.32rem;
}

.drawer-note {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.55;
}

.summary-tools {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.drawer-body {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: var(--space-4);
  padding: 0 24px 24px;
}

.drawer-panel {
  padding: 22px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-3);
}

.inline-heading {
  margin-top: var(--space-4);
  margin-bottom: var(--space-3);
}

.workflow-form,
.field-stack {
  display: grid;
  gap: var(--space-3);
}

.field-grid,
.choice-grid,
.control-grid,
.recent-runs {
  display: grid;
  gap: var(--space-3);
}

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

.control-grid.compact {
  grid-template-columns: minmax(0, 1fr);
}

.control-grid .wide {
  grid-column: 1 / -1;
}

.stack-label {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select,
.choice-card,
.upload-field,
.proposal-row,
.payment-term,
.payment-total,
.comparison-chip,
.proposal-total,
.breakdown-row,
.status-card,
.advisory-card,
.run-row,
.reference-fact,
.reference-table-row {
  border: 1px solid color-mix(in srgb, var(--line-strong) 50%, var(--line));
  border-radius: var(--radius-lg);
}

input,
select {
  min-height: 52px;
  padding: 12px 14px;
  background: color-mix(in srgb, var(--paper-soft) 84%, transparent);
  color: var(--ink);
}

input::placeholder {
  color: color-mix(in srgb, var(--muted) 76%, transparent);
}

.ghost-button,
.primary-button,
.source-chip {
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.ghost-button {
  background: color-mix(in srgb, var(--paper-soft) 84%, transparent);
  color: var(--ink);
  border-color: color-mix(in srgb, var(--line-strong) 32%, transparent);
  font-weight: 700;
}

.primary-button {
  background: linear-gradient(135deg, var(--blue), color-mix(in srgb, var(--blue) 62%, var(--gold)));
  color: #f8fbff;
  font-weight: 800;
  box-shadow: 0 18px 34px rgba(13, 75, 143, 0.24);
}

button:hover,
.source-chip:hover,
.control-drawer > summary:hover {
  transform: translateY(-1px);
}

button:focus,
input:focus,
select:focus,
.control-drawer > summary:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.7;
  cursor: wait;
}

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

.choice-card,
.upload-field,
.run-row {
  display: grid;
  gap: 8px;
  padding: 18px;
  background: color-mix(in srgb, var(--paper-soft) 88%, transparent);
}

.choice-card {
  cursor: pointer;
}

.choice-card.active {
  border-color: color-mix(in srgb, var(--blue) 28%, transparent);
  background: linear-gradient(150deg, color-mix(in srgb, var(--paper-soft) 94%, transparent), color-mix(in srgb, var(--blue-soft) 74%, transparent));
}

.choice-card input {
  margin: 0;
}

.choice-title {
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  font-size: 1.16rem;
}

.upload-field {
  border-style: dashed;
}

.lane-loader,
.empty-copy {
  display: grid;
  gap: 10px;
  align-items: center;
}

.inline-spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--muted) 26%, transparent);
  border-top-color: var(--blue);
  animation: spin 0.8s linear infinite;
}

.recent-runs {
  grid-template-columns: minmax(0, 1fr);
}

.run-row {
  gap: 12px;
}

.run-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: start;
}

.run-row p {
  margin: 0;
}

.run-status {
  padding: 6px 10px;
  background: color-mix(in srgb, var(--gold-soft) 66%, transparent);
  font-size: 0.84rem;
  font-weight: 700;
}

.beta-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(420px, 0.82fr);
  gap: 22px;
  align-items: start;
}

.proposal-column {
  min-width: 0;
}

.proposal-document {
  min-height: calc(100vh - 180px);
}

.proposal-sheet {
  background: var(--document);
  color: var(--ink);
  border: 1px solid color-mix(in srgb, var(--line-strong) 58%, transparent);
  border-radius: 28px;
  box-shadow: var(--sheet-shadow);
  padding: 56px 54px 40px;
}

.proposal-header {
  display: grid;
  gap: 16px;
  padding-bottom: 28px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  background: transparent;
}

.proposal-header.evidence-link,
.proposal-section.evidence-link {
  position: relative;
  z-index: 0;
}

.proposal-header.evidence-link > *,
.proposal-section.evidence-link > * {
  position: relative;
  z-index: 1;
}

.proposal-header.evidence-link::before,
.proposal-section.evidence-link::before {
  content: "";
  position: absolute;
  inset: -18px -18px -14px;
  border: 1px solid transparent;
  border-radius: 24px;
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--document) 97%, white),
      color-mix(in srgb, var(--blue-soft) 36%, white)
    );
  box-shadow: 0 14px 30px rgba(13, 75, 143, 0.06);
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    border-color 160ms ease,
    box-shadow 180ms ease;
  pointer-events: none;
}

.proposal-header.evidence-link.is-active::before,
.proposal-section.evidence-link.is-active::before {
  opacity: 1;
  transform: translateY(0);
  border-color: color-mix(in srgb, var(--blue) 24%, transparent);
  box-shadow: 0 18px 34px rgba(13, 75, 143, 0.1);
}

.proposal-topline,
.proposal-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.92rem;
}

.proposal-sheet h1,
.proposal-sheet h2 {
  font-family: "Bahnschrift", "Franklin Gothic Medium", "Arial Narrow", sans-serif;
  text-transform: uppercase;
  color: var(--blue);
  letter-spacing: 0.02em;
}

.proposal-sheet h1 {
  font-size: clamp(1.9rem, 3.2vw, 3.45rem);
  line-height: 0.96;
}

.proposal-sheet h2 {
  font-size: clamp(1.2rem, 2vw, 2rem);
}

.proposal-section {
  display: grid;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
}

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

.proposal-detail-table {
  display: grid;
}

.proposal-row,
.breakdown-row,
.reference-fact,
.reference-table-row,
.status-card,
.advisory-card,
.payment-term,
.payment-total,
.comparison-chip,
.proposal-total {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: color-mix(in srgb, var(--document) 92%, var(--blue-soft));
  color: var(--ink);
  transition:
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

button.evidence-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(
      150deg,
      color-mix(in srgb, var(--document) 96%, white),
      color-mix(in srgb, var(--blue-soft) 58%, white)
    );
  opacity: 0;
  transition: opacity 160ms ease;
  pointer-events: none;
  z-index: 0;
}

button.evidence-link {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

button.evidence-link > * {
  position: relative;
  z-index: 1;
}

.proposal-row {
  display: grid;
  grid-template-columns: minmax(160px, 0.76fr) minmax(0, 1fr);
  grid-template-areas:
    "label value"
    ". note";
  column-gap: 14px;
  row-gap: 6px;
  align-items: start;
  min-height: 62px;
  padding: 14px 16px;
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}

.proposal-row:first-child {
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
}

.proposal-row:last-child {
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.proposal-row-label {
  grid-area: label;
  font-weight: 800;
}

.proposal-row-value {
  grid-area: value;
  text-align: left;
  font-weight: 600;
}

.proposal-row-note {
  grid-area: note;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
  text-align: left;
}

.payment-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1.12fr);
  gap: 14px;
  align-items: stretch;
  padding: 24px;
  border: 2px solid color-mix(in srgb, var(--gold) 68%, white);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--document) 92%, transparent), color-mix(in srgb, var(--blue-soft) 34%, transparent));
}

.payment-term,
.payment-total {
  display: grid;
  grid-template-rows: minmax(2.8rem, auto) minmax(0, 1fr);
  justify-items: stretch;
  align-items: stretch;
  gap: 14px;
  min-height: 160px;
  padding: 20px;
  text-align: left;
}

.payment-term strong,
.payment-total strong,
.comparison-chip strong,
.proposal-total strong,
.status-card strong {
  font-family: "Bahnschrift", "Franklin Gothic Medium", "Arial Narrow", sans-serif;
  font-size: clamp(1.6rem, 2.8vw, 2.9rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  order: 2;
  align-self: center;
}

.payment-term > span,
.payment-total > span,
.comparison-chip > span,
.proposal-total > span,
.status-card > span {
  color: var(--muted);
  font-weight: 700;
  order: 1;
  align-self: start;
}

.payment-term > span,
.payment-total > span {
  text-align: center;
}

.money-value,
.money-inline {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 6px;
  width: 100%;
  font-variant-numeric: tabular-nums;
}

.money-currency {
  justify-self: start;
}

.money-amount {
  display: block;
  width: 100%;
  justify-self: end;
  text-align: right;
}

.payment-total {
  background: linear-gradient(150deg, color-mix(in srgb, var(--blue-soft) 92%, white), color-mix(in srgb, var(--gold-soft) 72%, white));
}

.payment-operator {
  display: grid;
  place-items: center;
  font-family: "Bahnschrift", "Franklin Gothic Medium", "Arial Narrow", sans-serif;
  font-size: clamp(2rem, 3.2vw, 3.2rem);
  font-weight: 700;
  color: var(--blue);
}

.comparison-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.comparison-chip,
.proposal-total,
.status-card {
  display: grid;
  gap: 8px;
  padding: 18px;
  text-align: left;
}

.comparison-chip.good strong {
  color: var(--good);
}

.proposal-section-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.proposal-total {
  min-width: min(320px, 100%);
}

.breakdown-table,
.reference-table {
  display: grid;
  gap: 8px;
}

.breakdown-header,
.breakdown-row,
.reference-table-head,
.reference-table-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(120px, 0.6fr) minmax(120px, 0.52fr);
  gap: 14px;
  align-items: center;
}

.breakdown-header,
.reference-table-head {
  padding: 0 16px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.breakdown-header > span:first-child,
.breakdown-row > span:first-child {
  justify-self: start;
  text-align: left;
}

.breakdown-header > span:nth-child(2),
.breakdown-header > span:nth-child(3),
.breakdown-row > strong,
.breakdown-row > span:last-child {
  justify-self: end;
  text-align: right;
}

.breakdown-row,
.reference-table-row {
  padding: 14px 16px;
  text-align: left;
}

.breakdown-row > strong,
.reference-table-row span:last-child {
  text-align: right;
}

.breakdown-row > .money-inline,
.breakdown-row > strong.money-inline {
  justify-self: end;
}

.breakdown-row > .money-inline {
  color: var(--ink);
  font-weight: 700;
}

.status-strip,
.advisory-grid {
  display: grid;
  gap: 14px;
}

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

.status-card.warning strong {
  color: var(--danger);
}

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

.advisory-card {
  display: grid;
  gap: 10px;
  padding: 18px;
  text-align: left;
}

.advisory-card p {
  margin: 0;
  line-height: 1.55;
  color: var(--muted);
}

.advisory-label {
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.proposal-footer {
  padding-top: 22px;
}

.empty-proposal {
  display: grid;
  place-items: center;
}

.empty-proposal-copy {
  max-width: 42rem;
  padding: 48px;
  text-align: center;
  border: 1px dashed color-mix(in srgb, var(--line-strong) 52%, transparent);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--paper-strong) 88%, transparent);
}

.empty-proposal-copy h2 {
  margin: 12px 0;
}

.empty-proposal-copy p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.evidence-column {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 14px;
  max-height: calc(100vh - 24px);
  overflow: auto;
  padding-right: 6px;
}

.evidence-column .stack-shell {
  box-shadow: var(--evidence-shadow);
}

.stack-shell {
  display: grid;
  gap: 12px;
  padding: 18px;
  transition: padding 160ms ease;
}

.stack-shell.collapsed {
  padding-bottom: 16px;
}

.stack-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.stack-heading > div:first-child {
  min-width: 0;
}

.stack-heading-side {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}

.stack-tools,
.stack-body {
  display: grid;
  gap: 12px;
}

.stack-body[hidden] {
  display: none !important;
}

.stack-tools {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  align-items: center;
}

.stack-toggle {
  min-width: 112px;
}

.stack-heading h2 {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: clamp(1.02rem, 0.62vw + 0.72rem, 1.18rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reference-card h3 {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 1.56rem;
  letter-spacing: -0.03em;
}

.stack-badge,
.stack-position,
.source-chip,
.stack-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid color-mix(in srgb, var(--line-strong) 44%, transparent);
  background: color-mix(in srgb, var(--paper-soft) 88%, transparent);
  color: var(--ink);
  font-weight: 700;
}

.source-chip {
  inline-size: 5.5rem;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

.text-link {
  align-self: center;
  font-weight: 700;
  text-decoration: none;
}

.disabled-link {
  pointer-events: none;
  opacity: 0.55;
}

.stack-insights {
  display: grid;
  gap: 12px;
  min-height: 96px;
  max-height: 118px;
  overflow: auto;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--line-strong) 42%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--paper-soft) 90%, transparent);
}

.empty-panel,
.empty-stage {
  color: var(--muted);
}

.empty-panel p,
.empty-stage p {
  margin: 0;
}

.insight-list,
.chip-row,
.reference-facts,
.reference-body {
  display: grid;
  gap: 10px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
}

.insight-note {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--line) 92%, transparent);
  background: color-mix(in srgb, var(--document) 92%, transparent);
  line-height: 1.5;
}

.muted-chip {
  background: color-mix(in srgb, var(--paper-soft) 88%, transparent);
  color: var(--muted);
}

.stack-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.stack-stage {
  position: relative;
  min-height: clamp(260px, 24vw, 360px);
  border-radius: 24px;
  overflow: hidden;
  isolation: isolate;
  clip-path: inset(0 round 24px);
  transition: min-height 180ms ease;
}

.reference-stage {
  min-height: clamp(300px, 26vw, 410px);
}

.source-shell.zoomed .stack-stage {
  min-height: var(--source-zoom-height, 780px);
}

.reference-shell.zoomed .reference-stage {
  min-height: var(--reference-zoom-height, 860px);
}

.reference-shell:not(.zoomed) .reference-card[data-offset="-1"] {
  transform: translateY(12px);
}

.reference-shell:not(.zoomed) .reference-card[data-offset="0"] {
  transform: translateY(0);
}

.reference-shell:not(.zoomed) .reference-card[data-offset="1"] {
  transform: translateY(18px);
}

.reference-shell:not(.zoomed) .reference-card[data-offset="2"] {
  transform: translateY(30px);
}

.stack-card {
  position: absolute;
  inset: 0 0 44px 0;
  border-radius: 20px;
  border: 1px solid color-mix(in srgb, var(--line-strong) 52%, transparent);
  background: var(--document);
  box-shadow: 0 18px 46px rgba(10, 23, 44, 0.16);
  transform-origin: top center;
  transition:
    transform 220ms ease,
    opacity 180ms ease,
    box-shadow 180ms ease,
    border-color 160ms ease;
}

.stack-card[data-offset="-1"] {
  z-index: 1;
  transform: translateY(24px) scale(0.95);
  opacity: 0.24;
}

.stack-card[data-offset="0"] {
  z-index: 4;
  transform: translateY(0) scale(1);
}

.stack-card[data-offset="1"] {
  z-index: 3;
  transform: translateY(20px) scale(0.97);
  opacity: 0.82;
}

.stack-card[data-offset="2"] {
  z-index: 2;
  transform: translateY(38px) scale(0.94);
  opacity: 0.6;
}

.stack-card.active,
.reference-card.is-active {
  border-color: color-mix(in srgb, var(--blue) 42%, transparent);
  box-shadow: 0 20px 52px rgba(13, 75, 143, 0.18);
}

button.evidence-link:hover,
button.evidence-link:focus-visible {
  border-color: color-mix(in srgb, var(--blue) 22%, var(--line-strong));
  box-shadow: 0 12px 24px rgba(13, 75, 143, 0.08);
}

button.evidence-link:hover::after,
button.evidence-link:focus-visible::after {
  opacity: 0.84;
}

button.evidence-link.is-active {
  border-color: color-mix(in srgb, var(--blue) 34%, transparent);
  box-shadow:
    0 16px 30px rgba(13, 75, 143, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

button.evidence-link.is-active::after {
  opacity: 1;
}

.reference-card[data-offset="-1"],
.reference-card[data-offset="1"],
.reference-card[data-offset="2"] {
  opacity: 1;
}

.source-card {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 14px;
  padding: 10px;
}

.source-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--line) 90%, transparent);
  background: color-mix(in srgb, var(--paper) 82%, white);
}

.stack-card-caption {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  padding: 0 2px;
  color: var(--muted);
}

.reference-card {
  display: grid;
  gap: 14px;
  padding: 24px;
  overflow: hidden;
  background: var(--document);
  isolation: isolate;
}

.reference-card-head {
  display: grid;
  gap: 6px;
}

.reference-card-preview {
  justify-content: space-between;
}

.reference-card-preview .reference-card-head {
  gap: 10px;
}

.reference-card-mini {
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 14px;
  padding: 10px;
  background: color-mix(in srgb, var(--paper-soft) 72%, white);
  justify-items: center;
}

.reference-shell:not(.zoomed) .reference-card-mini {
  padding: 8px 0 0;
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.reference-shell:not(.zoomed) .reference-card-mini.active,
.reference-shell:not(.zoomed) .reference-card-mini.is-active {
  border-color: transparent;
  box-shadow: none;
}

.reference-mini-sheet {
  display: grid;
  align-content: start;
  gap: 12px;
  width: min(100%, 15.75rem);
  max-width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1.414;
  padding: 18px 16px 14px;
  border: 1px solid color-mix(in srgb, var(--line) 90%, transparent);
  border-radius: var(--radius-md);
  background: var(--document);
  box-shadow: 0 16px 34px rgba(10, 23, 44, 0.08);
  overflow: hidden;
}

.reference-shell:not(.zoomed) .reference-card-mini .stack-card-caption {
  width: min(100%, 15.75rem);
}

.reference-shell:not(.zoomed) .reference-card[data-offset="-1"] .stack-card-caption,
.reference-shell:not(.zoomed) .reference-card[data-offset="1"] .stack-card-caption,
.reference-shell:not(.zoomed) .reference-card[data-offset="2"] .stack-card-caption {
  opacity: 0;
}

.reference-mini-sheet .reference-card-head {
  gap: 5px;
}

.reference-mini-sheet .reference-kicker {
  font-size: 0.6rem;
}

.reference-mini-sheet h3 {
  font-size: 1.06rem;
}

.reference-mini-sheet .reference-summary {
  font-size: 0.76rem;
  line-height: 1.35;
}

.reference-mini-sheet .reference-badges {
  gap: 6px;
}

.reference-mini-sheet .stack-chip {
  min-height: 26px;
  padding: 4px 10px;
  font-size: 0.72rem;
}

.reference-mini-body,
.reference-mini-section,
.reference-mini-lines {
  display: grid;
  gap: 8px;
}

.reference-mini-body {
  align-content: start;
}

.reference-mini-section h4 {
  margin: 0;
  font-size: 0.6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.reference-mini-lines span {
  display: block;
  padding: 6px 8px;
  border: 1px solid color-mix(in srgb, var(--line) 90%, transparent);
  border-radius: 10px;
  background: color-mix(in srgb, var(--paper-soft) 88%, transparent);
  color: var(--ink);
  font-size: 0.72rem;
  line-height: 1.25;
}

.reference-mini-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.reference-kicker {
  margin: 0;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.reference-summary,
.reference-copy p,
.reference-list li {
  color: var(--muted);
  line-height: 1.5;
}

.reference-summary,
.reference-copy p {
  margin: 0;
}

.reference-block {
  display: grid;
  gap: 10px;
}

.reference-block h4 {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--blue);
}

.reference-preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.reference-fact,
.reference-table-row {
  display: grid;
  gap: 6px;
  padding: 12px;
  text-align: left;
}

.reference-fact strong,
.reference-table-row span:last-child {
  font-weight: 800;
}

.reference-table-head,
.reference-table-row {
  grid-template-columns: minmax(0, 1.3fr) minmax(100px, 0.7fr) minmax(80px, 0.46fr);
}

.reference-list {
  margin: 0;
  padding-left: 18px;
}

.reference-footer {
  display: grid;
  gap: 8px;
  margin-top: auto;
  color: var(--muted);
  font-size: 0.88rem;
}

.hidden {
  display: none !important;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 1680px) {
  html {
    font-size: 17px;
  }

  .site-shell {
    max-width: 1880px;
    padding: 28px 34px 84px;
  }

  .beta-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(470px, 0.8fr);
  }

  .stack-stage {
    min-height: 380px;
  }

  .reference-stage {
    min-height: 430px;
  }
}

@media (max-width: 1320px) {
  .drawer-body,
  .beta-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .evidence-column {
    position: static;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }
}

@media (max-width: 920px) {
  .site-shell {
    padding: 24px 16px 48px;
  }

  .field-grid,
  .control-grid,
  .choice-grid,
  .proposal-details-grid,
  .comparison-strip,
  .status-strip,
  .advisory-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel-heading,
  .control-drawer > summary,
  .proposal-section-heading,
  .stack-heading,
  .stack-heading-side,
  .stack-tools,
  .stack-controls,
  .action-row,
  .proposal-topline,
  .proposal-footer {
    flex-direction: column;
    align-items: start;
  }

  .summary-tools,
  .status-message {
    justify-items: start;
    text-align: left;
  }

  .proposal-sheet {
    padding: 28px 20px 24px;
  }

  .proposal-sheet h1 {
    font-size: clamp(1.62rem, 7.4vw, 2.34rem);
  }

  .stack-heading h2 {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
  }

  .proposal-row,
  .breakdown-header,
  .breakdown-row,
  .reference-table-head,
  .reference-table-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .proposal-row-note {
    text-align: left;
  }

  .payment-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .payment-operator {
    min-height: 44px;
  }

  .stack-stage {
    min-height: 300px;
  }

  .reference-stage {
    min-height: 340px;
  }

  .stack-card {
    inset: 0 0 30px 0;
  }

  .stack-card[data-offset="-1"] {
    transform: translateY(14px) scale(0.95);
  }

  .stack-card[data-offset="1"] {
    transform: translateY(12px) scale(0.98);
  }

  .stack-card[data-offset="2"] {
    transform: translateY(24px) scale(0.95);
  }
}