/* P15 学情分层互动练习的局部样式。所有选择器限定在 .p15-* 范围内。 */
.p15-practice-root,
.p15-report-summary {
  --p15-blue: #0f62fe;
  --p15-blue-strong: #0043ce;
  --p15-ink: #161616;
  --p15-muted: #525252;
  --p15-line: #d0d0d0;
  --p15-soft: #f4f4f4;
  --p15-soft-blue: #edf5ff;
  --p15-green: #198038;
  --p15-red: #da1e28;
  --p15-amber: #8a5a00;
  color: var(--p15-ink);
  font-size: 14px;
  line-height: 1.55;
}

.p15-practice-root {
  margin: 20px 0 0;
}

.p15-panel {
  border: 1px solid var(--p15-line);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}

.p15-panel > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 12px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  background: #fafafa;
}

.p15-panel > summary::-webkit-details-marker {
  display: none;
}

.p15-panel > summary::before {
  content: "+";
  display: inline-grid;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid var(--p15-line);
  border-radius: 50%;
  color: var(--p15-blue);
  font-size: 18px;
  line-height: 1;
}

.p15-panel[open] > summary {
  border-bottom: 1px solid var(--p15-line);
  background: #fff;
}

.p15-panel[open] > summary::before {
  content: "−";
}

.p15-summary-title {
  font-size: 15px;
  letter-spacing: .01em;
}

.p15-summary-meta {
  margin-left: auto;
  color: var(--p15-muted);
  font-size: 12px;
  font-weight: 500;
  text-align: right;
}

.p15-body {
  padding: 16px;
}

.p15-mode-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--p15-line);
}

.p15-mode-label {
  margin-right: 2px;
  color: var(--p15-muted);
  font-weight: 700;
  font-size: 13px;
}

.p15-mode-button,
.p15-layer-button,
.p15-relation-button,
.p15-primary-button,
.p15-hint-button,
.p15-read-button {
  min-height: 36px;
  border: 1px solid var(--p15-blue);
  border-radius: 4px;
  padding: 7px 12px;
  background: #fff;
  color: var(--p15-blue-strong);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.p15-mode-button:hover,
.p15-layer-button:hover,
.p15-relation-button:hover,
.p15-primary-button:hover,
.p15-hint-button:hover,
.p15-read-button:hover {
  background: var(--p15-soft-blue);
}

.p15-mode-button:focus-visible,
.p15-layer-button:focus-visible,
.p15-relation-button:focus-visible,
.p15-primary-button:focus-visible,
.p15-hint-button:focus-visible,
.p15-read-button:focus-visible,
.p15-answer-button:focus-visible,
.p15-scenario-button:focus-visible,
.p15-svg-edge:focus-visible,
.p15-svg-node:focus-visible {
  outline: 3px solid rgba(15, 98, 254, .42);
  outline-offset: 2px;
}

.p15-mode-button.is-active,
.p15-layer-button.is-active,
.p15-relation-button.is-selected,
.p15-answer-button.is-selected,
.p15-scenario-button.is-selected {
  border-color: var(--p15-blue-strong);
  background: var(--p15-soft-blue);
  box-shadow: inset 0 0 0 1px var(--p15-blue);
}

.p15-mode-note {
  flex: 1 1 220px;
  color: var(--p15-muted);
  font-size: 12px;
}

.p15-boundary,
.p15-visual-caption,
.p15-short-copy,
.p15-locked-copy,
.p15-independent-note {
  margin: 8px 0;
  color: var(--p15-muted);
  font-size: 13px;
}

.p15-boundary {
  padding: 9px 12px;
  border-left: 3px solid var(--p15-blue);
  background: var(--p15-soft-blue);
}

.p15-layer-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 10px;
}

.p15-layer-button[aria-selected="true"] {
  background: var(--p15-soft-blue);
}

.p15-wire-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(250px, .85fr);
  gap: 14px;
  align-items: start;
}

.p15-wire-visual,
.p15-relation-card,
.p15-question-card,
.p15-step-card {
  min-width: 0;
  border: 1px solid var(--p15-line);
  border-radius: 5px;
  background: #fff;
}

.p15-wire-visual {
  padding: 10px;
  background: #fbfbfb;
}

.p15-wire-svg {
  display: block;
  width: 100%;
  min-height: 170px;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  background: #fdfdfd;
}

.p15-svg-grid path {
  fill: none;
  stroke: #e8e8e8;
  stroke-width: 1;
}

.p15-svg-edge {
  cursor: pointer;
}

.p15-edge-line {
  fill: none;
  stroke: #8d8d8d;
  stroke-width: 3;
  marker-end: url(#p15-arrow);
}

.p15-edge-hit {
  fill: transparent;
  stroke: transparent;
  stroke-width: 20;
}

.p15-edge-label {
  fill: var(--p15-muted);
  font-size: 13px;
  font-weight: 700;
  pointer-events: none;
}

.p15-svg-edge.is-selected .p15-edge-line {
  stroke: var(--p15-blue);
  stroke-width: 5;
}

.p15-svg-edge.is-selected .p15-edge-label {
  fill: var(--p15-blue-strong);
}

.p15-svg-edge.is-correct .p15-edge-line {
  stroke: var(--p15-green);
}

.p15-svg-edge.is-incorrect .p15-edge-line {
  stroke: var(--p15-red);
}

.p15-svg-node {
  cursor: pointer;
}

.p15-svg-node rect {
  fill: #fff;
  stroke: #8d8d8d;
  stroke-width: 2;
}

.p15-svg-node text {
  fill: var(--p15-ink);
  font-size: 13px;
  font-weight: 700;
  text-anchor: middle;
  pointer-events: none;
}

.p15-svg-node.is-selected rect {
  fill: var(--p15-soft-blue);
  stroke: var(--p15-blue);
  stroke-width: 3;
}

.p15-visual-caption {
  margin: 8px 2px 0;
}

.p15-relation-card {
  padding: 12px;
}

.p15-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.p15-card-head h3,
.p15-card-head h4 {
  margin: 2px 0 0;
  color: var(--p15-ink);
  font-size: 15px;
  line-height: 1.35;
}

.p15-kicker {
  display: block;
  color: var(--p15-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .03em;
}

.p15-mini-status,
.p15-status-chip {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 24px;
  border: 1px solid var(--p15-line);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--p15-muted);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.p15-status-chip.is-good {
  border-color: #a7f0ba;
  color: var(--p15-green);
  background: #effaf1;
}

.p15-status-chip.is-warn {
  border-color: #f6c6c6;
  color: var(--p15-red);
  background: #fff1f1;
}

.p15-relation-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin: 12px 0;
}

.p15-relation-button {
  padding: 7px 5px;
  font-size: 12px;
}

.p15-inline-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.p15-primary-button {
  background: var(--p15-blue);
  color: #fff;
}

.p15-primary-button:hover {
  background: var(--p15-blue-strong);
  color: #fff;
}

.p15-hint-box {
  flex: 1 1 220px;
  min-width: 0;
}

.p15-hint-button {
  min-height: 32px;
  padding: 5px 8px;
  border-color: #8d8d8d;
  color: var(--p15-ink);
  font-size: 12px;
  font-weight: 600;
}

.p15-hint-button:disabled {
  cursor: not-allowed;
  opacity: .55;
}

.p15-hint-line {
  margin: 5px 0;
  padding: 5px 8px;
  border-left: 2px solid var(--p15-amber);
  background: #fff8e1;
  color: var(--p15-ink);
  font-size: 12px;
}

.p15-question-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 10px;
  margin: 18px 0 8px;
}

.p15-question-heading h3 {
  margin: 2px 0 0;
  font-size: 15px;
}

.p15-question-stack {
  display: grid;
  gap: 10px;
}

.p15-question-card {
  padding: 12px;
}

.p15-answer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin-top: 10px;
}

.p15-answer-button,
.p15-scenario-button {
  display: flex;
  align-items: flex-start;
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--p15-line);
  border-radius: 4px;
  padding: 8px 9px;
  background: #fff;
  color: var(--p15-ink);
  font: inherit;
  font-size: 13px;
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
}

.p15-answer-button:hover,
.p15-scenario-button:hover {
  border-color: var(--p15-blue);
  background: #f8fbff;
}

.p15-option-marker {
  display: inline-flex;
  flex: 0 0 22px;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--p15-soft);
  color: var(--p15-muted);
  font-size: 12px;
  font-weight: 700;
}

.p15-feedback {
  margin-top: 10px;
  padding: 9px 10px;
  border-left: 3px solid var(--p15-line);
  background: var(--p15-soft);
  font-size: 13px;
}

.p15-feedback.is-good {
  border-left-color: var(--p15-green);
  background: #effaf1;
}

.p15-feedback.is-warn {
  border-left-color: var(--p15-red);
  background: #fff1f1;
}

.p15-feedback strong {
  display: block;
  font-size: 13px;
}

.p15-feedback p {
  margin: 3px 0;
}

.p15-feedback small {
  color: var(--p15-muted);
  font-size: 12px;
}

.p15-diagnosis .p15-body {
  padding-bottom: 18px;
}

.p15-step-list {
  display: grid;
  gap: 10px;
}

.p15-step-card {
  padding: 12px;
}

.p15-step-card.is-locked {
  background: #fafafa;
}

.p15-step-card.is-locked .p15-status-chip {
  color: var(--p15-muted);
}

.p15-scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin-top: 10px;
}

.p15-scenario-button {
  display: block;
}

.p15-scenario-button strong,
.p15-scenario-button span {
  display: block;
}

.p15-scenario-button strong {
  margin-bottom: 3px;
  font-size: 13px;
}

.p15-scenario-button span {
  color: var(--p15-muted);
  font-size: 12px;
}

.p15-evidence-card {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid #9ec5fe;
  border-left: 4px solid var(--p15-blue);
  border-radius: 4px;
  background: var(--p15-soft-blue);
}

.p15-evidence-card strong {
  display: block;
  margin: 2px 0 3px;
  font-size: 13px;
}

.p15-evidence-card p {
  margin: 0;
  font-size: 13px;
}

.p15-read-button {
  margin-top: 10px;
  background: #fff;
}

.p15-report-summary {
  margin-top: 20px;
  border: 1px solid var(--p15-line);
  border-radius: 5px;
  background: #fff;
}

.p15-report-summary h3 {
  margin: 2px 0 0;
  font-size: 16px;
}

.p15-report-summary p {
  margin: 10px 0;
  font-size: 13px;
}

.p15-report-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 10px 0;
}

.p15-report-stats span {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  border: 1px solid var(--p15-line);
  border-radius: 999px;
  padding: 3px 9px;
  color: var(--p15-muted);
  font-size: 12px;
}

.p15-report-summary ol {
  display: grid;
  gap: 5px;
  margin: 8px 0 0;
  padding-left: 20px;
}

.p15-report-summary li {
  padding-left: 2px;
  font-size: 13px;
}

.p15-report-summary li .p15-status-chip {
  margin-right: 6px;
  vertical-align: middle;
}

@media (max-width: 760px) {
  .p15-wire-layout {
    grid-template-columns: 1fr;
  }

  .p15-answer-grid,
  .p15-scenario-grid {
    grid-template-columns: 1fr;
  }

  .p15-summary-meta {
    max-width: 48%;
  }
}

@media (max-width: 520px) {
  .p15-body {
    padding: 12px;
  }

  .p15-panel > summary {
    align-items: flex-start;
    padding: 10px 12px;
  }

  .p15-summary-title {
    font-size: 14px;
  }

  .p15-summary-meta {
    font-size: 12px;
  }

  .p15-mode-row {
    align-items: flex-start;
  }

  .p15-mode-note {
    flex-basis: 100%;
  }

  .p15-relation-actions {
    grid-template-columns: 1fr;
  }

  .p15-wire-svg {
    min-height: 180px;
  }

  .p15-question-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .p15-practice-root *,
  .p15-report-summary * {
    scroll-behavior: auto;
    transition: none !important;
  }
}