.srabpi-body {
  background: var(--color-surface);
}
.pi-page {
  --pi-ink: var(--color-text);
  --pi-green: #125d38;
  max-width: 1100px;
  width: 100%;
  padding: 12px 20px 0;
  margin: 0 auto;
  color: var(--color-text);
}
.pi-page * {
  box-sizing: border-box;
}
.pi-page [hidden] {
  display: none !important;
}
.pi-shell {
  height: var(--pi-shell-height, calc(100dvh - 120px));
  min-height: 520px;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  gap: 8px;
}
.pi-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 12px;
  align-items: center;
}
.public-page .pi-page .pi-title-copy h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 1;
  margin: 0;
}
.pi-title-copy p {
  font-size: 0.95rem;
  margin: 4px 0;
  line-height: 1.2;
}
.pi-title-motif {
  height: 72px;
  grid-column: 1/-1;
  display: grid;
  place-items: center;
}
.pi-art {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}
.pi-title-motif .pi-art {
  max-height: 72px;
  width: 190px;
}
.pi-number-planet {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}
.pi-number-planet span {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-left: 10px;
}
.pi-options,
.pi-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.pi-page button,
.pi-popover button {
  min-height: 42px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-accent);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 7px 13px;
  cursor: pointer;
  line-height: 1.2;
}
.pi-page button:hover:enabled,
.pi-popover button:hover:enabled {
  background: var(--color-accent);
  color: var(--color-surface);
}
.pi-page button:disabled {
  opacity: 0.45;
  cursor: default;
}
.pi-page .button,
#pi-start,
#pi-again,
#pi-leave-confirm {
  background: var(--color-accent);
  color: var(--color-surface);
}
.pi-options button {
  font-size: 0.78rem;
  min-height: 36px;
  padding: 6px 9px;
}
.pi-page .pi-info {
  width: 36px;
  min-width: 36px;
  height: 36px;
  min-height: 36px;
  border-radius: 50%;
  padding: 0;
  font-style: italic;
  font-family: var(--font-body);
  display: inline-grid;
  place-items: center;
}
.pi-toolbar {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}
.pi-toolbar nav {
  display: flex;
  gap: 6px;
  align-items: stretch;
  flex-wrap: wrap;
}
.pi-toolbar [role="tab"] {
  flex: 1;
  white-space: nowrap;
  border-color: transparent;
  padding: 9px 10px;
}
.pi-toolbar [aria-selected="true"] {
  background: var(--color-accent);
  color: var(--color-surface);
}
.pi-content {
  min-height: 0;
  position: relative;
}
/* Keep the complete test form in the page flow on shorter windows. */
.pi-shell:has([data-panel="test"]:not([hidden])) {
  height: auto;
  min-height: var(--pi-shell-height, calc(100dvh - 120px));
}
.pi-content:has([data-panel="test"]:not([hidden])) {
  height: auto;
}
.pi-panel[data-panel="test"] {
  height: auto;
  overflow: visible;
}
.pi-panel {
  height: 100%;
  overflow: auto;
  overscroll-behavior: auto;
  padding: 8px 4px 12px;
  scrollbar-gutter: stable;
  scroll-padding: 12px;
}
.pi-panel p {
  line-height: 1.4;
}
.pi-panel h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.15;
  margin: 4px 0 8px;
}
.pi-page :focus-visible,
.pi-popover :focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}
.pi-fields {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: end;
}
.pi-fields label {
  display: grid;
  gap: 3px;
  font-weight: 700;
  font-size: 0.84rem;
  min-width: 100px;
  flex: 1;
}
.pi-fields select,
.pi-fields input {
  width: 100%;
  min-height: 40px;
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
}
.pi-learn-controls {
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr 36px;
  margin-bottom: 8px;
}
.pi-learn-controls label {
  min-width: 0;
}
.pi-learn-stage,
.pi-test-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 20px;
  align-items: center;
}
.pi-number-workspace {
  min-width: 0;
}
.pi-position {
  display: flex;
  gap: 8px;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: 0.76rem;
  color: var(--color-muted);
  line-height: 1.3;
}
.pi-page progress {
  width: 100%;
  display: block;
  height: 8px;
  accent-color: var(--color-accent);
  margin: 6px 0;
}
.pi-learn-number {
  font-family: var(--font-body);
  font-size: clamp(3.3rem, 6.7vw, 5.2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.16em;
  line-height: 1.05;
  text-align: center;
  height: 96px;
  display: grid;
  place-items: center;
  color: var(--color-text);
}
.pi-group-controls {
  justify-content: space-between;
}
.pi-group-controls button {
  min-height: 38px;
  font-size: 0.85rem;
  padding: 6px 12px;
}
.pi-entry-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 9px 0 4px;
}
.public-page .pi-page .pi-entry {
  font-family: var(--font-body);
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  line-height: 1.1;
  text-align: center;
  height: 78px;
  min-height: 78px;
  margin: 0;
  padding: 4px 12px;
  width: 100%;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}
.pi-feedback {
  height: 48px;
  overflow: auto;
  margin: 7px 0 0;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.35;
}
.pi-correct {
  color: var(--pi-green);
}
.pi-wrong {
  color: var(--color-accent);
}
.pi-correct::first-letter {
  font-size: 1.3em;
}
.pi-mascot {
  min-width: 0;
  align-self: center;
}
.pi-mascot .pi-art {
  width: 170px;
  height: 160px;
}
.pi-mascot p {
  font-size: 0.85rem;
  line-height: 1.35;
  margin: 8px 0;
}
.pi-neutral-art {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: 4rem;
  color: var(--color-accent);
  font-family: var(--font-heading);
}
#pi-learn-image,
.pi-reaction {
  height: 160px;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.pi-test-controls {
  align-items: center;
  margin-bottom: 8px;
}
.pi-test-controls label {
  flex: 0 1 160px;
}
#pi-count {
  margin-left: auto;
  font-size: 0.9rem;
}
.pi-test-stage {
  align-items: center;
}
.pi-sequence {
  height: 72px;
  overflow: auto;
  display: flex;
  align-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 1.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 4px 0;
  line-height: 1.3;
  overscroll-behavior: auto;
}
.pi-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  padding: 3px 8px;
  border: 1px solid var(--pi-green);
  border-radius: 8px;
  color: var(--pi-green);
  background: var(--color-surface);
}
.pi-check {
  font-size: 1.2em;
  font-weight: 700;
}
.pi-result-slot {
  height: 135px;
  overflow: auto;
  border-top: 1px solid var(--color-border);
  margin-top: 7px;
  padding-top: 8px;
  overscroll-behavior: auto;
}
.pi-result-copy {
  display: flex;
  gap: 12px;
  align-items: baseline;
  flex-wrap: wrap;
}
.pi-result-copy h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.3;
  margin: 0;
}
.pi-result-copy p {
  font-size: 0.85rem;
  margin: 3px 0 5px;
  line-height: 1.3;
}
#pi-result .pi-actions button {
  min-height: 36px;
  padding: 5px 10px;
  font-size: 0.85rem;
}
#pi-share-status {
  font-size: 0.8rem;
  margin: 3px 0;
}
.pi-page textarea {
  width: 100%;
  font: inherit;
}
#pi-network {
  font-size: 0.8rem;
  margin: 0;
  line-height: 1.25;
  color: var(--color-muted);
}
#pi-network:empty {
  display: none;
}
.pi-discovery {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 20px;
  align-items: center;
  min-height: 100%;
}
.pi-circle-story {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-width: 0;
}
.pi-circle-story .pi-art {
  width: 45%;
  max-height: 220px;
}
.pi-circle-story svg {
  width: 55%;
  max-height: 260px;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text);
}
.pi-circle-story:not(:has(img)) svg {
  width: 100%;
}
.pi-circle {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 4;
}
.pi-diameter {
  stroke: var(--color-accent);
  stroke-width: 4;
}
.pi-radius {
  stroke: var(--color-text);
  stroke-width: 3;
}
.pi-story-copy p {
  font-size: 0.94rem;
  margin: 8px 0;
  line-height: 1.45;
}
.pi-unroll {
  margin-top: 12px;
  font-size: 0.8rem;
}
.pi-ruler {
  display: flex;
  white-space: nowrap;
}
.pi-ruler span {
  width: 31.83%;
  border-left: 1px solid var(--color-accent);
  padding-left: 5px;
}
.pi-ruler span:last-child {
  width: 4.51%;
}
.pi-circumference {
  height: 6px;
  background: var(--color-accent);
  border-radius: 3px;
  margin: 5px 0;
}
.pi-lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.pi-lab-grid .pi-fields {
  gap: 6px;
}
.pi-lab-grid .pi-fields label {
  min-width: 80px;
}
.pi-lab-circle {
  display: grid;
  place-items: center;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: 1.5rem;
  margin: 8px auto;
  max-height: 100px;
  max-width: 100px;
}
#pi-calculation dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3px 12px;
  font-size: 0.84rem;
  margin: 6px 0;
}
#pi-calculation dd {
  margin: 0;
  font-weight: 700;
}
#pi-calculation p,
.pi-lab-grid p {
  font-size: 0.82rem;
  margin: 5px 0;
  line-height: 1.4;
}
#pi-polygon {
  width: 190px;
  height: 190px;
  display: block;
  margin: 4px auto;
  color: var(--color-text);
}
.pi-outer {
  stroke: var(--color-accent);
  stroke-dasharray: 5 2;
}
.pi-inner {
  stroke: #3157a4;
}
.pi-page input[type="range"] {
  width: 100%;
  min-height: 32px;
}
.pi-side-art {
  float: right;
  max-width: 80px;
  max-height: 80px;
  margin: 0 0 8px 10px;
}
.pi-knowledge {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  clear: both;
}
.pi-article {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  align-self: start;
}
.pi-article summary {
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1.35;
  padding-right: 26px;
}
.pi-article summary span {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-muted);
  margin-top: 4px;
}
.pi-article p {
  font-size: 0.9rem;
  line-height: 1.45;
  margin: 10px 0 0;
}
.pi-article .pi-art {
  max-height: 140px;
  margin: 8px auto;
}
.pi-article-source {
  position: absolute;
  top: 8px;
  right: 8px;
}
.pi-compact-details {
  font-size: 0.82rem;
}
.pi-compact-details summary {
  cursor: pointer;
  color: var(--color-accent);
}
.pi-popover {
  font-family: var(--font-body);
  max-width: min(92vw, 520px);
  max-height: 80dvh;
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
  line-height: 1.5;
}
.pi-popover h2 {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  margin: 0 0 8px;
}
.pi-popover p,
.pi-popover label {
  font-size: 0.95rem;
}
.pi-popover::backdrop {
  background: rgb(0 0 0 / 0.16);
}
.pi-popover label {
  display: block;
  margin: 10px 0;
}
.pi-page.motion-on .pi-pop {
  animation: pi-pop 0.25s ease-out;
}
.pi-page.motion-on .pi-wiggle {
  animation: pi-wiggle 0.25s ease-out;
}
.pi-page.motion-on .pi-glow {
  animation: pi-glow 0.3s ease-out;
}
.pi-page.motion-on .pi-article-motion[open] {
  animation: pi-pop 0.25s ease-out;
}
.pi-page.motion-on .pi-unroll.play .pi-circumference {
  animation: pi-unroll 1s ease-out;
  transform-origin: left;
}
@keyframes pi-pop {
  50% {
    transform: translateY(-5px);
  }
}
@keyframes pi-wiggle {
  30% {
    transform: rotate(-2deg);
  }
  60% {
    transform: rotate(2deg);
  }
}
@keyframes pi-glow {
  50% {
    text-shadow: 0 0 8px currentColor;
  }
}
@keyframes pi-unroll {
  from {
    transform: scaleX(0.01);
  }
  to {
    transform: scaleX(1);
  }
}
@media (max-width: 740px) {
  .pi-page {
    padding: 8px 12px 0;
  }
  .pi-shell {
    height: auto;
    min-height: 0;
    grid-template-rows: auto auto auto auto;
  }
  .pi-content {
    height: 560px;
    max-height: none;
  }
  .pi-title-copy p {
    font-size: 0.83rem;
  }
  .public-page .pi-page .pi-title-copy h1 {
    font-size: 2.5rem;
  }
  .pi-title-motif {
    height: 68px;
  }
  .pi-title-motif .pi-art {
    max-height: 68px;
  }
  .pi-options {
    gap: 4px;
  }
  .pi-options button {
    font-size: 0.72rem;
    padding: 5px 7px;
  }
  .pi-number-planet span {
    font-size: 0.8rem;
    max-width: 18ch;
    line-height: 1.1;
    margin-left: 5px;
  }
  .pi-toolbar nav {
    gap: 4px;
  }
  .pi-toolbar [role="tab"] {
    flex: 1 0 28%;
    font-size: 0.9rem;
    padding: 8px 6px;
  }
  .pi-toolbar [role="tab"]:nth-child(n + 4) {
    flex: 1 0 42%;
  }
  .pi-learn-controls {
    grid-template-columns: 1fr 1fr 36px;
    gap: 6px;
  }
  .pi-learn-controls label:nth-child(2) {
    grid-column: 1/3;
    grid-row: 2;
  }
  .pi-learn-controls label:nth-child(3) {
    grid-column: 2;
    grid-row: 1;
  }
  .pi-learn-controls .pi-info {
    grid-column: 3;
    grid-row: 1;
  }
  .pi-learn-stage,
  .pi-test-stage {
    grid-template-columns: minmax(0, 1fr) 78px;
    gap: 10px;
  }
  .pi-mascot .pi-art {
    width: 78px;
    height: 100px;
  }
  #pi-learn-image,
  .pi-reaction {
    height: 100px;
  }
  .pi-mascot p {
    font-size: 0.75rem;
  }
  .pi-position {
    font-size: 0.73rem;
  }
  .pi-learn-number {
    font-size: 3.2rem;
    letter-spacing: 0.1em;
    height: 86px;
  }
  .public-page .pi-page .pi-entry {
    font-size: 2.8rem;
    letter-spacing: 0.06em;
    height: 72px;
    min-height: 72px;
    padding: 4px;
  }
  .pi-group-controls {
    gap: 4px;
  }
  .pi-group-controls button {
    font-size: 0.73rem;
    padding: 6px;
    min-height: 40px;
    flex: 1;
  }
  .pi-feedback {
    height: 66px;
    font-size: 0.86rem;
  }
  .pi-test-controls {
    gap: 6px;
  }
  .pi-test-controls label {
    flex: 1 1 100px;
  }
  #pi-count {
    width: 100%;
    margin: 0;
    font-size: 0.84rem;
  }
  .pi-sequence {
    height: 88px;
    font-size: 1.12rem;
  }
  .pi-result-slot {
    height: 160px;
  }
  .pi-discovery {
    grid-template-columns: 1fr;
    gap: 8px;
    align-content: start;
  }
  .pi-circle-story {
    height: 185px;
  }
  .pi-circle-story .pi-art {
    max-height: 170px;
  }
  .pi-circle-story svg {
    max-height: 185px;
  }
  .pi-story-copy p {
    font-size: 0.88rem;
  }
  .pi-story-copy h3 {
    font-size: 1.35rem;
  }
  .pi-lab-grid,
  .pi-knowledge {
    grid-template-columns: 1fr;
  }
  .pi-lab-grid {
    gap: 18px;
  }
  .pi-panel {
    padding: 6px 2px 10px;
  }
  .pi-popover {
    padding: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .pi-page * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

.pi-admin .pi-fields {
  align-items: start;
}
.pi-admin details {
  margin-bottom: 18px;
}
.pi-admin textarea {
  min-height: 90px;
  width: 100%;
}
.pi-admin .pi-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
}
.pi-admin .pi-stat-grid div {
  background: #f2f5ed;
  padding: 15px;
  border-radius: 10px;
}
.pi-admin .pi-stat-grid dd {
  font-size: 1.8rem;
  font-weight: bold;
  margin: 0;
}
.pi-admin .pi-chart {
  display: grid;
  grid-template-columns: 80px 1fr 60px;
  gap: 12px;
  align-items: center;
  margin: 12px 0;
}
.pi-admin .pi-chart meter {
  width: 100%;
  height: 24px;
}
.pi-admin table {
  width: 100%;
  border-collapse: collapse;
}
.pi-admin td,
.pi-admin th {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #ccc;
}
.pi-admin .pi-admin-row {
  padding: 15px 0;
  border-top: 1px solid #ccc;
}
.pi-admin input:not([type="checkbox"]),
.pi-admin select {
  max-width: 100%;
}
.pi-admin .pi-image-preview {
  width: 90px;
  height: 90px;
  object-fit: contain;
  margin: 8px;
}
.pi-admin .pi-field {
  display: grid;
  gap: 6px;
  margin: 14px 0;
}
.pi-admin .pi-field input {
  min-height: 42px;
}
.pi-admin .pi-field small {
  font-weight: 400;
}
.pi-admin .pi-media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.pi-admin dialog {
  width: min(94vw, 700px);
  border: 2px solid #183d32;
  border-radius: 18px;
  padding: 24px;
}
.pi-admin dialog::backdrop {
  background: #0007;
}

.pi-knowledge-item {
  position: relative;
  min-width: 0;
  align-self: start;
}
.pi-neutral-art {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  max-height: 160px;
  font-family: var(--font-heading);
  font-size: 5rem;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}
.pi-river-controls,
.pi-river-navigation {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.pi-river-controls label,
.pi-river-navigation label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
}
.pi-river-navigation input {
  width: 110px;
}
.pi-river-number {
  min-height: 160px;
  padding: 18px 0;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  line-height: 1.75;
  overflow-wrap: anywhere;
  word-spacing: 0.4em;
}
.pi-river-number strong {
  color: var(--color-accent);
  font-size: 1.4em;
  margin-right: 0.35em;
}
.pi-river-navigation {
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}
#pi-river-range {
  font-size: 0.85rem;
  color: var(--color-muted);
}
.pi-shell:has([data-panel="river"]:not([hidden])) {
  height: auto;
  min-height: var(--pi-shell-height, calc(100dvh - 120px));
}
.pi-content:has([data-panel="river"]:not([hidden])) {
  height: auto;
}
.pi-panel[data-panel="river"] {
  height: auto;
  overflow: visible;
}
@media (max-width: 740px) {
  .pi-toolbar [role="tab"]:nth-child(n + 4) {
    flex: 1 0 28%;
  }
}
.pi-river-counter {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-sm);
  max-width: 500px;
  margin: 18px auto 12px;
  padding: 16px 24px;
  text-align: center;
}
.pi-river-counter-value {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.pi-river-counter-label {
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}
.pi-learn-controls {
  grid-template-columns: 1fr 1fr 1.6fr 1fr 36px;
}
.pi-wide-groups .pi-learn-number {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  align-content: center;
  gap: 0.3em;
  height: auto;
  min-height: 96px;
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  letter-spacing: 0.05em;
}
.pi-wide-groups .pi-learn-number span {
  white-space: nowrap;
}
.public-page .pi-page.pi-wide-groups .pi-entry {
  font-size: clamp(1rem, calc(70vw / var(--pi-interval-size)), 2.6rem);
  letter-spacing: 0.03em;
}
.pi-wide-groups .pi-feedback {
  height: auto;
  min-height: 48px;
  overflow: visible;
}
@media (max-width: 740px) {
  .pi-learn-controls {
    grid-template-columns: 1fr 1fr 36px;
  }
  .pi-learn-controls label:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
  }
  .pi-learn-controls label:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
  }
  .pi-learn-controls label:nth-child(3) {
    grid-column: 1/-1;
    grid-row: 2;
  }
  .pi-learn-controls label:nth-child(4) {
    grid-column: 1/-1;
    grid-row: 3;
  }
  .pi-learn-controls .pi-info {
    grid-column: 3;
    grid-row: 1;
  }
  .pi-wide-groups .pi-learn-stage,
  .pi-wide-groups .pi-test-stage {
    grid-template-columns: minmax(0, 1fr);
  }
  .pi-wide-groups .pi-mascot {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .pi-wide-groups #pi-learn-image,
  .pi-wide-groups .pi-reaction,
  .pi-wide-groups .pi-mascot .pi-art {
    height: 60px;
    width: 60px;
  }
  .pi-wide-groups .pi-neutral-art {
    font-size: 2.5rem;
  }
  .pi-wide-groups .pi-mascot p {
    flex: 1;
  }
}
.pi-river-search {
  border-block: 1px solid var(--color-border);
  padding: 14px 0;
  margin: 12px 0;
}
.pi-search-form {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 8px;
}
.pi-search-form label {
  display: grid;
  gap: 4px;
  flex: 1 1 240px;
  max-width: 440px;
  font-size: 0.9rem;
  font-weight: 700;
}
.pi-search-form input {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  font: inherit;
  padding: 8px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
}
.pi-search-scope,
#pi-search-page {
  font-size: 0.8rem;
  color: var(--color-muted);
}
#pi-search-status {
  min-height: 1.4em;
  overflow-wrap: anywhere;
}
.pi-search-positions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  list-style: none;
  margin: 8px 0;
  padding: 0;
}
.pi-search-positions button {
  font-size: 0.85rem;
  min-height: 36px;
  padding: 6px 9px;
}
.pi-search-preview {
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
  line-height: 1.6;
}
.pi-search-preview mark {
  background: var(--color-accent);
  color: #fff;
  padding: 2px 3px;
  border-radius: 2px;
}

/* Keep the river controls in view; only the digit window advances. */
.pi-shell:has([data-panel="river"]:not([hidden])) {
  height: var(--pi-shell-height, calc(100dvh - 120px));
  min-height: 580px;
}
.pi-shell:has([data-panel="river"]:not([hidden])) .pi-title-motif {
  display: none;
}
.pi-content:has([data-panel="river"]:not([hidden])) {
  height: 100%;
  min-height: 0;
}
.pi-panel[data-panel="river"]:not([hidden]) {
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 5px;
  min-height: 0;
  padding-block: 4px;
}
.pi-panel[data-panel="river"] > :not(.pi-river-number) {
  flex-shrink: 0;
}
.pi-panel[data-panel="river"] p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.35;
}
.pi-river-counter {
  margin: 0 auto;
  padding: 6px 24px;
  gap: 0;
  min-width: 240px;
}
.pi-river-counter-value {
  font-size: clamp(2rem, 4vw, 3rem);
}
.pi-river-counter-label {
  font-size: 0.8rem;
}
.pi-river-search {
  margin: 0;
  padding: 5px 0;
}
.pi-river-search h3 {
  display: none;
}
.pi-search-form {
  flex-wrap: nowrap;
  gap: 6px;
}
.pi-search-form label {
  flex: 1;
  max-width: none;
  font-size: 0.8rem;
}
.pi-search-form input {
  min-height: 36px;
  padding: 5px;
}
.pi-panel[data-panel="river"] button {
  font-size: 0.8rem;
  padding: 6px 9px;
  min-height: 36px;
}
#pi-search-status:empty {
  display: none;
}
.pi-river-number {
  flex: 1 1 0;
  min-height: 64px;
  padding: 6px 0;
  overflow: hidden;
  font-size: clamp(1.1rem, 2vw, 1.65rem);
  line-height: 1.65;
}
.pi-river-number strong {
  font-size: 1em;
}
.pi-river-navigation {
  gap: 5px;
  padding-top: 5px;
}
#pi-river-range {
  flex: 1 0 100%;
  font-size: 0.75rem;
  order: -1;
}
.pi-river-navigation input {
  width: 100px;
  min-height: 36px;
}
.pi-river-scope {
  text-align: center;
}
@media (max-width: 740px) {
  .pi-shell:has([data-panel="river"]:not([hidden])) {
    min-height: 640px;
  }
  .pi-panel[data-panel="river"] .pi-river-controls {
    gap: 5px;
  }
  .pi-river-navigation label {
    font-size: 0.75rem;
  }
  .pi-river-navigation input {
    width: 90px;
  }
  .pi-search-scope {
    font-size: 0.7rem !important;
  }
}
/* Warp stays inside the original counter; the established viewer layout is unchanged. */
.pi-river-counter {
  position: relative;
  overflow: hidden;
}
.pi-warp::before,
.pi-warp::after {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 28px;
  width: 24px;
  pointer-events: none;
  opacity: 0.3;
  background: repeating-linear-gradient(
    0deg,
    transparent 0 9px,
    #fff 9px 10px,
    transparent 10px 19px
  );
  animation: pi-speed-lines 0.24s linear infinite;
}
.pi-warp::before {
  left: 4px;
}
.pi-warp::after {
  right: 4px;
  animation-direction: reverse;
}
@keyframes pi-speed-lines {
  from {
    transform: translateX(-5px) skewY(-12deg);
  }
  to {
    transform: translateX(5px) skewY(-12deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .pi-warp::before,
  .pi-warp::after {
    display: none;
    animation: none;
  }
}
/* Search hits in the original digit lines; typography and layout stay unchanged. */
.pi-river-number mark {
  background: #ffe26c;
  color: #211a00;
  padding: 0;
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.pi-river-number mark.pi-search-current {
  box-shadow: inset 0 -2px var(--color-accent);
}