/* Chapter structure for the Prismatic reference, using its existing material. */
.prism-guide .guide-index {
  padding: 1rem 0 3rem;
}
.prism-guide .guide-index > p {
  margin-bottom: 1rem;
}
.prism-guide .guide-index ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 1.5rem;
  list-style: none;
}
.prism-guide .guide-index a {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.2rem 0.6rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--hairline);
  color: inherit;
  text-decoration: none;
  min-height: 92px;
}
.prism-guide .guide-index a > span {
  font: 11px/1.7 var(--mono);
}
.prism-guide .guide-index a strong {
  font-size: 16px;
  font-weight: 600;
}
.prism-guide .guide-index a small {
  grid-column: 2;
  font-size: 13px;
}
.prism-guide .guide-index a:hover strong {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.prism-guide .guide-chapter {
  padding: 3rem 0;
  border-top: 1px solid var(--hairline);
  scroll-margin-top: 110px;
}
.prism-guide .guide-chapter > header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: end;
}
.prism-guide .guide-chapter > header h2 {
  font: 600 clamp(26px, 3.4vw, 38px)/1.15 var(--sans);
  letter-spacing: -0.035em;
  margin-top: 0.6rem;
}
.prism-guide .guide-chapter > header > p {
  max-width: 52ch;
}
.prism-guide .guide-chapter > .ds-section {
  padding-bottom: 1rem;
}
.prism-guide .guide-chapter > .ds-section > header h3 {
  font: 600 24px/1.3 var(--sans);
  letter-spacing: -0.02em;
  margin-top: 0.35rem;
}
.prism-guide .guide-chapter > .ds-section > header p {
  opacity: 1;
}
.prism-guide .ds-law,
.prism-guide .ds-caption,
.prism-guide .ds-type-meta {
  opacity: 0.8;
}
.prism-guide .guide-concepts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.prism-guide .guide-concepts h3 {
  font-size: 21px;
  line-height: 1.25;
  margin: 1rem 0 0.7rem;
}
.prism-guide .guide-concepts p:last-child {
  font-size: 15px;
  line-height: 1.6;
}
.prism-guide .guide-concepts .prism-holo {
  min-height: 104px;
  padding: 16px;
  margin-bottom: 1rem;
}
.prism-guide .guide-bands {
  display: flex;
  gap: 4px;
  height: 60px;
  align-items: center;
  margin: 1rem 0;
}
.prism-guide .guide-bands i {
  flex: 1;
  height: 60px;
  background: var(--anchor);
  border-radius: 7px;
}
.prism-guide .guide-bands i:nth-child(2) {
  background: var(--near);
  height: 48px;
}
.prism-guide .guide-bands i:nth-child(3) {
  background: var(--far);
  height: 36px;
}
.prism-guide .guide-bands i:nth-child(4) {
  background: var(--counter);
  height: 24px;
}
.prism-guide .guide-invariant {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--anchor);
  max-width: 82ch;
}
.prism-guide .guide-invariant strong {
  display: block;
  font: 12px/1.6 var(--mono);
  margin-bottom: 0.5rem;
}
.prism-guide .guide-table-wrap {
  overflow-x: auto;
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--r-md);
  box-shadow: var(--elev-dense);
  margin: 1.2rem 0;
}
.prism-guide .guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}
.prism-guide .guide-table caption {
  text-align: left;
  padding: 1.2rem;
  font: 12px/1.5 var(--mono);
}
.prism-guide .guide-table th,
.prism-guide .guide-table td {
  padding: 1rem 1.2rem;
  vertical-align: top;
  border-top: 1px solid color-mix(in oklch, var(--ink) 18%, transparent);
}
.prism-guide .guide-table thead th {
  font: 11px/1.5 var(--mono);
  text-transform: uppercase;
}
.prism-guide .guide-equations {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
.prism-guide .guide-equations .prism-card {
  box-shadow: var(--elev-dense);
}
.prism-guide .guide-equations h3 {
  font-size: 18px;
  margin-bottom: 0.8rem;
}
.prism-guide .guide-equations code {
  display: block;
  font: 12px/1.7 var(--mono);
  overflow-wrap: anywhere;
  margin-bottom: 0.8rem;
}
.prism-guide .guide-equations p {
  font-size: 14px;
}
.prism-guide .guide-contract {
  margin-top: 1rem;
  font: 12px/1.7 var(--mono);
  overflow-wrap: anywhere;
}
.prism-guide .guide-code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  padding: 1.5rem;
  margin: 1rem 0;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  font: 12px/1.8 var(--mono);
}
.prism-guide .guide-composition {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
  align-items: start;
}
.prism-guide .guide-composition h3 {
  font-size: 24px;
  line-height: 1.25;
  margin: 0.8rem 0;
}
.prism-guide .guide-composition .guide-table-wrap {
  margin: 0;
}
.prism-guide .guide-composition .guide-table {
  min-width: 340px;
}
.prism-guide .guide-record[data-current="true"] {
  background: var(--standing-tint);
  box-shadow: inset 2px 0 var(--anchor);
}
.prism-guide .guide-record small {
  display: block;
  font-size: 12px;
}
.prism-guide .guide-composition details {
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--hairline);
}
.prism-guide .guide-composition summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.prism-guide .guide-composition details p {
  font-size: 14px;
  margin-top: 0.7rem;
}
.prism-guide .guide-avoid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
  list-style: none;
}
.prism-guide .guide-avoid li {
  border-top: 1px solid var(--hairline);
  padding-top: 1rem;
}
.prism-guide .guide-avoid strong {
  display: block;
  margin-bottom: 0.4rem;
}
.prism-guide .guide-avoid p {
  font-size: 14px;
}
.prism-guide
  :is(.guide-index a, .guide-chapter a, .guide-chapter summary):focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}
.prism-guide .guide-chapter a {
  color: inherit;
  text-underline-offset: 4px;
}
.prism-guide .ds-paint {
  max-width: 100%;
  --px-size: clamp(10px, 2.8vw, 16px) !important;
}
.prism-guide .ds-mx-cell {
  min-width: max-content;
}
@media (max-width: 760px) {
  .prism-guide .guide-index ol {
    grid-template-columns: 1fr 1fr;
    gap: 0 1rem;
  }
  .prism-guide .guide-chapter > header,
  .prism-guide .guide-concepts,
  .prism-guide .guide-equations,
  .prism-guide .guide-composition {
    grid-template-columns: 1fr;
  }
  .prism-guide .guide-chapter > header {
    gap: 1rem;
  }
  .prism-guide .guide-chapter {
    scroll-margin-top: 165px;
  }
  .prism-guide .guide-table th,
  .prism-guide .guide-table td {
    padding: 0.8rem;
  }
  .prism-guide .guide-avoid {
    grid-template-columns: 1fr;
  }
}

/* ================= Showcase chrome (reference + lab) =================
   Reads PRISM role tokens; mints no brand hex. */
/* Showcase-only supplement. Reads PRISM role tokens; mints no brand hex. */

/* Info inherits the anchor; --standing-tint is the one sanctioned wash. */
[data-mode="day"] {
  --standing-tint: oklch(0.74 0.125 var(--h) / 0.08);
  --info: var(--anchor);
  --info-dense: oklch(0.44 0.10 var(--h));
  --on-info: #fff;
}
[data-mode="night"] {
  --standing-tint: oklch(0.72 0.115 var(--hr) / 0.14);
  --info: var(--anchor);
  --info-dense: var(--anchor);
  --on-info: var(--field);
}

html, body { min-height: 100%; }
body { padding-bottom: 6rem; }

/* Type roles. Secondary text dims via opacity, not color-mix(currentColor…),
   which Chromium resolves one mode/hue stale after a toggle or hue drag. */
.prism-headline { font-family: var(--sans); font-size: 24px; font-weight: 600; letter-spacing: -0.02em; }
.prism-body { font-size: 15.5px; line-height: 1.55; }
.prism-ui { font-size: 13.5px; font-weight: 500; }
.prism-data { font-family: var(--mono); font-size: 13px; }
.prism-eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.62; }
.prism-aside { font-family: var(--serif); font-style: italic; font-size: 16px; opacity: 0.72; }
.prism-muted { opacity: 0.68; }

/* Card hover — day lifts toward the light; night glows brighter (no lift). */
.prism-card {
  transition: background var(--t-sunset) var(--e-refract),
              box-shadow var(--t-flash) var(--t-lag) var(--e-light),
              transform var(--t-arrive) var(--e-light),
              color var(--t-sunset) var(--e-refract);
}
.prism-card.ds-lift:hover { box-shadow: var(--elev-hi); transform: translate(-2px, -3px); }
[data-mode="night"] .prism-card.ds-lift:hover { transform: none; }
.prism-btn--primary.prism-edge:hover::before { background-position: 100% 100%; }

.prism-swatch {
  border-radius: var(--r-sm); min-height: 64px; display: flex; align-items: flex-end;
  padding: 0.5rem 0.6rem; font-family: var(--mono); font-size: 12px;
  color: var(--ink); box-shadow: var(--elev-dense);
}
.prism-swatch small { opacity: 0.7; }
.ds-swatch-label { display: flex; flex-direction: column; gap: 0.1rem; }

.prism-badge--warn { background: var(--warning-dense); color: var(--on-warning-dense); }
.prism-badge--info { background: var(--info-dense); color: var(--on-info); }
.prism-btn--danger { background: var(--danger-dense); color: var(--on-danger-dense); box-shadow: var(--elev-dense); }

/* Data surface as a block grid */
.prism-table {
  background: var(--surface); color: var(--ink); border-radius: var(--r-md);
  overflow: hidden; box-shadow: var(--elev-dense); font-family: var(--mono); font-size: 13px;
}
.prism-table .prism-row, .ds-thead { display: grid; grid-template-columns: var(--cols, 1fr 1fr 1fr); gap: 1rem; align-items: center; }
.ds-thead {
  padding: 10px; border-bottom: 1px solid var(--hairline);
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: color-mix(in oklch, var(--ink) 60%, transparent);
}
.prism-table .prism-row:last-child { border-bottom: none; }
.prism-row.lit::before { opacity: 1; }
.prism-row.lit { background: var(--standing-tint); }
.prism-row:focus-visible { outline: 2px solid var(--anchor); outline-offset: -2px; }

/* Entanglement dot */
.prism-dot {
  width: 14px; height: 14px; border-radius: 50%; background: var(--anchor); box-shadow: var(--elev-dense);
  transition: box-shadow var(--t-flash) var(--e-light), transform var(--t-flash) var(--e-light);
}
.prism-dot.lit { box-shadow: 0 0 0 4px var(--standing-tint); transform: scale(1.15); }

/* Superposition collapse (5q) */
.prism-ghost.collapsed { background: transparent; }
.prism-ghost.collapsed::before, .prism-ghost.collapsed::after {
  animation: none; opacity: 0; transition: opacity calc(var(--q) * 5) var(--e-light);
}


/* Radiance monitor */
.ds-mono { margin: 0.35rem 0 0; }
.ds-mono b, .ds-range output { color: var(--anchor); font-weight: 500; }
.ds-range { display: flex; align-items: center; gap: 0.75rem; margin: 1.1rem 0 0.9rem; }
.ds-range input { flex: 1; accent-color: var(--anchor); }
.ds-range output { font-family: var(--mono); font-size: 13px; min-width: 1.5ch; }
.ds-cascades td, .ds-cascades th { font-family: var(--mono); font-size: 12.5px; padding: 0.55rem 1rem; }
.ds-cascades tr[data-off] { opacity: 0.35; }

/* Icons & displays */
.ds-icon-row { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.ds-icon-tile {
  background: none; border: none; cursor: pointer; padding: 0.35rem;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  border-radius: var(--r-sm); color: inherit;
}
.ds-icon-tile .prism-data { opacity: 0.65; }
.ds-icon-tile:hover .prism-data { opacity: 1; }
.ds-icon-tile:focus-visible { outline: 2px solid var(--anchor); outline-offset: 3px; }
.ds-paint { touch-action: none; cursor: crosshair; }
.ds-paint:focus-visible { outline: 2px solid var(--anchor); outline-offset: 4px; }
.ds-paint b.cursor { outline: 2px solid var(--counter); outline-offset: 1px; }

/* Page chrome (ds-*) */
.ds-skip {
  position: absolute; left: -999px; top: 0; background: var(--surface); color: var(--ink);
  padding: 0.5rem 1rem; border-radius: var(--r-sm); z-index: 50;
}
.ds-skip:focus { left: 0.5rem; top: 0.5rem; }

.ds-controls {
  position: sticky; top: 0; z-index: 40;
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem;
  padding: 0.85rem clamp(1rem, 4vw, 3rem);
  background: color-mix(in oklch, var(--field) 86%, transparent);
  backdrop-filter: blur(10px) saturate(140%); -webkit-backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--hairline);
  transition: background var(--t-sunset) var(--e-refract), border-color var(--t-sunset) var(--e-refract);
}
.ds-brand {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase;
  color: inherit; opacity: 0.6; text-decoration: none; margin-right: auto;
}
.ds-brand:hover { opacity: 1; }
.ds-hue { display: flex; align-items: center; gap: 0.6rem; }
.ds-hue label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; opacity: 0.6; }
.ds-hue input[type='range'] {
  -webkit-appearance: none; appearance: none; width: clamp(120px, 22vw, 240px); height: 8px;
  border-radius: 999px; outline-offset: 4px;
  background: linear-gradient(to right,
    oklch(0.72 0.16 0), oklch(0.72 0.16 60), oklch(0.72 0.16 120),
    oklch(0.72 0.16 180), oklch(0.72 0.16 240), oklch(0.72 0.16 300), oklch(0.72 0.16 360));
}
.ds-hue input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: var(--anchor); border: 2px solid var(--surface); box-shadow: var(--elev-dense); cursor: pointer;
}
.ds-hue input[type='range']::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%; background: var(--anchor);
  border: 2px solid var(--surface); cursor: pointer;
}
.ds-readout { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.ds-readout b { color: var(--anchor); font-weight: 500; }
.ds-mode {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em;
  padding: 0.5rem 0.9rem; border-radius: var(--r-sm); border: 1px solid var(--hairline);
  background: var(--surface); color: var(--ink); cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.5ch;
  transition: background var(--t-sunset) var(--e-refract), color var(--t-sunset) var(--e-refract);
}
.ds-mode .ds-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--anchor); }

.ds-page { max-width: 1080px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem); }
.ds-hero { padding: clamp(2.5rem, 7vw, 5rem) 0 2rem; }
.ds-hero .prism-aside { display: block; margin-top: 0.75rem; }
.ds-hero .ds-intro { max-width: 56ch; margin-top: 1.25rem; }

.ds-section { padding: 2.5rem 0; border-top: 1px solid var(--hairline); }
.ds-section > header { margin-bottom: 1.5rem; }
.ds-section header p { max-width: 64ch; margin: 0.5rem 0 0; }
.ds-section header a { color: var(--anchor); }
.ds-law { font-family: var(--mono); font-size: 12px; }

.ds-grid { display: grid; gap: 1rem; }
.ds-grid--4 { grid-template-columns: repeat(4, 1fr); }
.ds-grid--3 { grid-template-columns: repeat(3, 1fr); }
.ds-grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 760px) {
  .ds-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .ds-grid--3, .ds-grid--2 { grid-template-columns: 1fr; }
}
.ds-row-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.ds-stack { display: flex; flex-direction: column; gap: 0.6rem; }

/* sizes × styles sheet */
.ds-matrix {
  display: grid; grid-template-columns: 76px repeat(5, minmax(0, 1fr));
  gap: 0.9rem 0.75rem; align-items: center; overflow-x: auto;
}
.ds-mx-cell { display: flex; align-items: center; }
.ds-mx-label { font-family: var(--mono); font-size: 11.5px; opacity: 0.6; white-space: nowrap; }

.ds-replay {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.35rem 0.7rem; border-radius: var(--r-sm); border: 1px solid var(--hairline);
  background: transparent; color: inherit; opacity: 0.7; cursor: pointer;
}
.ds-replay:hover { opacity: 1; border-color: var(--anchor); }
.ds-caption { font-family: var(--mono); font-size: 12px; margin-top: 0.6rem; }

.ds-type-stack { display: flex; flex-direction: column; gap: 1.1rem; }
.ds-type-stack > * { margin: 0; }
.ds-type-meta { font-family: var(--mono); font-size: 12px; }

.ds-footer {
  max-width: 1080px; margin: 3rem auto 0; padding: 2rem clamp(1rem, 4vw, 3rem) 0;
  border-top: 1px solid var(--hairline); font-family: var(--mono); font-size: 13px;
  color: color-mix(in oklch, var(--on-ground) 70%, transparent);
}
.ds-footer a { color: var(--anchor); }
.ds-footer p + p { margin-top: 1rem; line-height: 1.7; }
.ds-footer code { color: currentColor; }

/* v0.9: decision tables, acceptance list, playground */
.prism-guide .ds-lookup th, .prism-guide .ds-lookup td { padding: 0.6rem 0.9rem; font-size: 13px; }
.prism-guide .ds-lookup th[scope="row"] { font: 500 12.5px var(--mono); white-space: nowrap; }
.prism-guide .ds-lookup td small { display: block; font-size: 11.5px; opacity: 0.62; margin-top: 0.15rem; }
.prism-guide .ds-accept { list-style: none; display: grid; gap: 0.45rem; margin-top: 0.4rem; }
.prism-guide .ds-accept li { padding-left: 1.4rem; position: relative; font-size: 14px; }
.prism-guide .ds-accept li::before { content: "☐"; position: absolute; left: 0; opacity: 0.6; }
.prism-guide .ds-playground { height: clamp(300px, 40vw, 420px); }
.prism-guide .ds-playground [data-material], .prism-guide .ds-playground button[data-source] { cursor: grab; }
.prism-guide .ds-playground button[data-source] { border: none; padding: 0; }
.prism-guide select { font: 12.5px var(--sans); padding: 4px 6px; margin-left: 0.4rem; border-radius: 8px; border: 1px solid var(--hairline); background: var(--surface); color: var(--ink); }
.prism-guide .ds-hero .ds-intro a { color: var(--anchor); }