.memory-react {
  border: 1px solid #555;
  background: #fff;
  font:
    14px/1.35 system-ui,
    sans-serif;
  padding: 10px;
  color: #1b1b1b;
}
.memory-react > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #bbb;
  padding-bottom: 7px;
}
.memory-react > header small {
  display: block;
  margin-bottom: 2px;
  color: #555;
  font:
    700 10px/1.2 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
}
.memory-react h3 {
  font-size: 15px;
  margin: 0;
}
.memory-actions {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.memory-actions button {
  border: 1px solid #777;
  background: #fff;
  padding: 4px 8px;
  cursor: pointer;
}
.memory-actions button[aria-pressed="true"] {
  background: #dff3fb;
  border-color: #237da1;
  font-weight: 700;
}
.memory-lanes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(125px, 1fr));
  gap: 6px;
  margin: 8px 0;
}
.memory-lane {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 3px;
  border: 1px solid #999;
  background: #fafafa;
  padding: 7px;
  text-align: left;
}
.memory-lane.compile {
  background: #fff8dc;
}
.memory-lane.bss {
  background: #edf7fb;
}
.memory-lane.stack {
  background: #f3f8ef;
}
.memory-lane.registers {
  background: #f4f4f4;
}
.memory-lane.text {
  background: #f7f0fa;
}
.memory-lane > b {
  font-size: 11px;
  letter-spacing: 0.04em;
}
.memory-lane button {
  border: 1px solid transparent;
  background: transparent;
  padding: 3px;
  text-align: left;
  cursor: pointer;
}
.memory-lane button:hover,
.memory-lane button.active {
  border-color: #238bb7;
  background: #fff;
}
.memory-lane code {
  font-size: 10px;
  white-space: normal;
}
.arena-wrap {
  margin: 12px 0 6px;
}
.arena-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}
.arena {
  --allocp: 0;
  --arena-size: 64;
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--arena-size), 1fr);
  height: 40px;
  border: 1px solid #222;
  margin-bottom: 28px;
}
.arena i {
  border-right: 1px solid #ddd;
}
.arena .allocp {
  position: absolute;
  left: calc(var(--allocp) / var(--arena-size) * 100%);
  top: 43px;
  transform: translateX(-50%);
  color: #087da8;
  font:
    700 11px/1.2 ui-monospace,
    monospace;
  white-space: nowrap;
}
.memory-stage {
  border-top: 1px solid #ddd;
  padding-top: 7px;
  margin: 0;
}
.memory-inspector {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  margin-top: 7px;
  padding: 7px;
  border-left: 3px solid #238bb7;
  background: #f5fbfd;
}
.memory-inspector strong {
  grid-row: 1/3;
}
.memory-inspector code {
  font-size: 11px;
}
.memory-inspector span {
  font-size: 12px;
}
.asset-static-fallback {
  display: none;
}
.uml-react {
  border: 1px solid #555;
  background: #fff;
  font:
    13px/1.35 system-ui,
    sans-serif;
  color: #1b1b1b;
}
.uml-react > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  border-bottom: 1px solid #bbb;
  background: #fafafa;
}
.uml-react > header small {
  display: block;
  color: #555;
  font:
    700 10px/1.2 ui-monospace,
    monospace;
  letter-spacing: 0.06em;
}
.uml-react h3 {
  margin: 2px 0 0;
  font-size: 15px;
}
.uml-actions {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.uml-actions button {
  border: 1px solid #777;
  background: #fff;
  padding: 4px 8px;
  cursor: pointer;
}
.uml-actions button[aria-pressed="true"] {
  border-color: #315f78;
  background: #eaf4fa;
  font-weight: 700;
}
.uml-canvas {
  display: block;
  padding: 8px;
  text-align: center;
}
.uml-canvas img {
  display: block;
  width: 100%;
  max-height: 760px;
  object-fit: contain;
}
.uml-stage {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 10px;
  margin: 0 8px 8px;
  padding: 8px;
  border-left: 3px solid #315f78;
  background: #eef7fb;
}
.uml-stage strong {
  grid-row: 1/3;
}
.uml-stage code {
  grid-column: 2;
  font-size: 11px;
}
.asset-source-link {
  display: inline-block;
  margin: 5px 0;
  color: #315f78;
  font:
    600 11px/1.3 system-ui,
    sans-serif;
}
.lesson-progress-control {
  display: inline-flex;
  align-items: center;
  margin-right: 7px;
  padding: 2px 7px;
  border: 1px solid #8c8c8c;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}
.lesson-progress-control:disabled {
  cursor: wait;
  opacity: 0.6;
}
.lesson-progress-control[data-status="discussed"] {
  background: #fff4cc;
  border-color: #9b6a00;
}
.lesson-progress-control[data-status="completed"] {
  background: #e7f6ed;
  border-color: #18794e;
}
.lesson-progress-dock {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 30;
  width: min(320px, calc(100vw - 24px));
  border: 1px solid #555;
  background: #fff;
  padding: 10px;
  box-shadow: 0 4px 18px #0003;
  font:
    14px/1.35 system-ui,
    sans-serif;
}
.lesson-progress-dock p {
  margin: 5px 0;
}
.lesson-progress-error {
  color: #9b1c1c;
}
.step-row {
  display: flex;
  align-items: center;
  margin: 4px 0;
}
.section-anchor {
  position: relative;
  top: -45px;
}
.app-load-error {
  max-width: 760px;
  margin: 10vh auto;
  padding: 24px;
  border: 1px solid #9b1c1c;
  background: #fff;
  font-family: system-ui, sans-serif;
}
.app-load-error pre {
  white-space: pre-wrap;
}
@media (max-width: 800px) {
  .memory-lanes {
    grid-template-columns: 1fr 1fr;
  }
  .memory-react > header,
  .uml-react > header {
    align-items: flex-start;
    flex-direction: column;
  }
  .memory-actions {
    justify-content: flex-start;
  }
}
@media print {
  .memory-react {
    display: none !important;
  }
  .asset-static-fallback {
    display: block !important;
    width: 100%;
  }
  .uml-actions,
  .uml-stage,
  .asset-source-link,
  .lesson-progress-dock,
  .lesson-progress-control {
    display: none !important;
  }
}