:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --ink: #152022;
  --muted: #667376;
  --line: #d9e0e2;
  --panel: #ffffff;
  --panel-strong: #edf4f2;
  --teal: #167f76;
  --teal-dark: #0d514b;
  --coral: #d95b43;
  --amber: #c58a20;
  --violet: #6f63c6;
  --blue: #2c6fb7;
  --shadow: 0 18px 50px rgba(20, 32, 34, 0.10);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  min-height: 88px;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--teal-dark);
  font-size: 0.76rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  line-height: 1.05;
}

h2 {
  font-size: 0.95rem;
  line-height: 1.25;
}

.runbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.icon-button,
.text-button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #fff;
  min-height: 40px;
  border-radius: 8px;
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    background 150ms ease;
}

.icon-button {
  width: 42px;
  font-size: 1.25rem;
}

.text-button {
  min-width: 86px;
  padding: 0 11px;
  font-size: 0.82rem;
  font-weight: 760;
}

.icon-button:hover,
.text-button:hover,
.segmented button:hover {
  transform: translateY(-1px);
}

.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(285px, 330px) minmax(0, 1fr);
  min-height: 0;
}

.control-panel {
  background: #ffffff;
  border-right: 1px solid var(--line);
  padding: 22px;
  overflow: auto;
}

.panel-section {
  padding: 0 0 20px;
  margin: 0 0 20px;
  border-bottom: 1px solid var(--line);
}

.panel-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.panel-section h2 {
  margin-bottom: 13px;
}

.learning-path {
  margin: 12px 0 0;
  padding-left: 0;
  display: grid;
  gap: 10px;
  list-style: none;
}

.learning-path li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--muted);
}

.learning-path li.is-active {
  border-color: rgba(22, 127, 118, 0.4);
  background: #f2fbf8;
}

.learning-path li.is-done {
  color: var(--teal-dark);
  border-color: rgba(22, 127, 118, 0.22);
  background: #f7fbfa;
  font-weight: 650;
}

.mission-status {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.learning-path li.is-active .mission-status,
.learning-path li.is-done .mission-status {
  background: var(--teal);
  color: #ffffff;
}

.mission-body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.mission-body strong {
  color: var(--ink);
  font-size: 0.86rem;
  line-height: 1.25;
}

.mission-body small {
  display: block;
  font-size: 0.76rem;
  line-height: 1.35;
}

.mission-readout {
  color: var(--teal-dark);
  font-weight: 650;
}

.mission-target-button,
.tour-reset-button {
  grid-column: 2;
  min-height: 31px;
  width: fit-content;
  padding: 0 10px;
  font-size: 0.78rem;
}

.tour-reset-button {
  margin-top: 10px;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.segmented button {
  min-height: 36px;
  padding: 0 8px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 720;
}

.segmented button.is-active {
  background: #ffffff;
  color: var(--teal-dark);
  box-shadow: 0 4px 16px rgba(22, 127, 118, 0.13);
}

.slider-row,
.switch-row,
.field-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 13px;
  font-size: 0.88rem;
  color: var(--ink);
}

.label-with-info {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.info-tip {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  border: 1px solid #a9bfbc;
  border-radius: 50%;
  background: #f4fbfa;
  color: var(--teal-dark);
  cursor: help;
  font-size: 0.67rem;
  font-weight: 820;
  line-height: 1;
  user-select: none;
}

.info-tip:focus {
  outline: 2px solid rgba(22, 127, 118, 0.28);
  outline-offset: 2px;
}

.label-with-info::before,
.label-with-info::after {
  position: absolute;
  left: 0;
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-2px);
  transition:
    opacity 140ms ease,
    transform 140ms ease;
}

.label-with-info::before {
  content: "";
  top: calc(100% + 3px);
  width: 10px;
  height: 10px;
  margin-left: 6px;
  border-left: 1px solid #b8c6c8;
  border-top: 1px solid #b8c6c8;
  background: #ffffff;
  transform: rotate(45deg) translateY(-2px);
}

.label-with-info::after {
  content: attr(data-tooltip);
  top: calc(100% + 8px);
  width: min(260px, calc(100vw - 44px));
  padding: 11px 12px;
  border: 1px solid #b8c6c8;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(20, 32, 34, 0.16);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 560;
  line-height: 1.38;
}

.label-with-info:hover::before,
.label-with-info:hover::after,
.label-with-info:focus-within::before,
.label-with-info:focus-within::after {
  opacity: 1;
  transform: translateY(0);
}

.label-with-info:hover::before,
.label-with-info:focus-within::before {
  transform: rotate(45deg) translateY(0);
}

output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.switch-row {
  align-items: center;
  margin-bottom: 2px;
}

.field-row {
  align-items: center;
}

select {
  width: 142px;
  min-height: 34px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
}

input[type="checkbox"] {
  width: 42px;
  height: 24px;
  margin: 0;
  accent-color: var(--teal);
}

.secondary-button {
  width: 100%;
  min-height: 36px;
  margin-top: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--teal-dark);
  font-weight: 760;
}

.secondary-button:hover {
  border-color: #b7cdca;
  background: #f8fbfa;
}

.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
  background: #f4f7f6;
}

.button-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.button-pair .secondary-button {
  margin-top: 10px;
}

.lesson-note {
  min-height: 56px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.42;
}

.main-stage {
  min-width: 0;
  padding: 24px;
  overflow: auto;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(118px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.metric,
.view {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 14px 15px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 680;
  margin-bottom: 4px;
}

.metric strong {
  display: block;
  font-size: clamp(1.1rem, 2vw, 1.55rem);
  font-variant-numeric: tabular-nums;
}

.quality-metric[data-quality="stable"] strong {
  color: var(--teal-dark);
}

.quality-metric[data-quality="watch"] strong {
  color: #774c00;
}

.quality-metric[data-quality="unstable"] strong {
  color: #9e2f22;
}

.metric small {
  display: block;
  min-height: 16px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.model-note p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.45;
}

.view-grid {
  display: grid;
  grid-template-columns: minmax(360px, 1.15fr) minmax(300px, 0.85fr);
  gap: 16px;
}

.view {
  min-width: 0;
  overflow: hidden;
}

.trace-view {
  grid-column: 1 / -1;
}

.view-heading {
  height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px solid var(--line);
}

.view-heading span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 680;
  white-space: nowrap;
}

.view-heading select {
  width: 130px;
  min-height: 30px;
  font-size: 0.78rem;
  font-weight: 680;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #ffffff;
}

.trace-view canvas {
  aspect-ratio: 980 / 360;
}

.spectrum-view canvas,
.network-view canvas,
.fc-view canvas {
  aspect-ratio: 560 / 340;
}

.bands-view canvas,
.model-view canvas,
.homeostasis-view canvas {
  aspect-ratio: 560 / 270;
}

.insight-view {
  grid-column: 1 / -1;
}

.insights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.insights p {
  min-height: 96px;
  margin: 0;
  padding: 18px;
  background: #ffffff;
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.45;
}

.insights p::first-line {
  font-weight: 780;
}

.inspector {
  padding: 14px 16px;
  border-top: 1px solid var(--line);
  background: #fbfcfc;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.45;
}

.warnings {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
}

.warning-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 9px;
  border-radius: 8px;
  background: #fff5e4;
  color: #774c00;
  border: 1px solid #f0d49a;
  font-size: 0.78rem;
  font-weight: 720;
}

.warning-chip.is-ok {
  background: #edf4f2;
  color: var(--teal-dark);
  border-color: #c8ddd8;
}

@media (max-width: 1060px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .control-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(2, minmax(250px, 1fr));
    gap: 18px;
  }

  .metrics-grid {
    grid-template-columns: repeat(3, minmax(150px, 1fr));
  }

  .panel-section {
    margin: 0;
    border-bottom: 0;
  }
}

@media (max-width: 760px) {
  .topbar {
    padding: 16px;
    align-items: flex-start;
    flex-direction: column;
  }

  .control-panel,
  .main-stage {
    padding: 16px;
  }

  .control-panel,
  .metrics-grid,
  .view-grid {
    grid-template-columns: 1fr;
  }

  .insights {
    grid-template-columns: 1fr;
  }

  .trace-view {
    grid-column: auto;
  }
}