:root,
html[data-theme="light"] {
  --ink: #153b32;
  --ink-soft: #5f766f;
  --muted: #73877f;
  --line: #1b534424;
  --line-strong: #1b53443d;
  --bg: #f5f3e9;
  --surface: #fffdf6e6;
  --panel: #fffdf7;
  --field: #faf9f1;
  --green: #1f765f;
  --green-soft: #dfeee5;
  --orange: #ea6543;
  --gold: #efc957;
  --violet: #776184;
  --blue: #437785;
  --shadow: 0 24px 70px #23413614;
  --focus: #1f765f6b;
  --wash-a: #c5e5d385;
  --wash-b: #f4d7913d;
  --grid: #1f765f09;
  --grid-size: 76px;
  --stage-bg: #edf0e8;
  --stage-plane-a: #ffffffb8;
  --stage-plane-b: #dfe9e2c2;
  --stage-shadow: #153b3230;
  --rail-highlight: #f6fbf7;
  --rail-main: #77958c;
  --rail-shadow: #31564c;
  --rod-highlight: #fff8d6;
  --rod-main: #d89c2d;
  --rod-shadow: #7d5c21;
  --flux-fill-strong: #1f765f4d;
  --flux-fill-soft: #43778514;
  --flux-edge-color: #1f765f25;
  --field-arrow: #437785;
  --field-arrow-soft: #43778542;
  --current: #ea6543;
  --current-soft: #ea654326;
  --motion-arrow: #776184;
  --chart-grid: #1b53441c;
}

html[data-theme="dark"] {
  --ink: #effcf9;
  --ink-soft: #c2d4d3;
  --muted: #8da7ab;
  --line: #94ddd426;
  --line-strong: #94ddd43d;
  --bg: #030e13;
  --surface: #071920d1;
  --panel: #071920e0;
  --field: #020e139e;
  --green: #62e7d0;
  --green-soft: #62e7d014;
  --orange: #9a86ff;
  --gold: #ffc36d;
  --violet: #9a86ff;
  --blue: #74b9ff;
  --shadow: 0 22px 70px #00000026;
  --focus: #62e7d094;
  --wash-a: #329c9730;
  --wash-b: #6649b81f;
  --grid: #ffffff05;
  --grid-size: 64px;
  --stage-bg: #04141b;
  --stage-plane-a: #0b2730d9;
  --stage-plane-b: #071820e6;
  --stage-shadow: #00000075;
  --rail-highlight: #d6f4ef;
  --rail-main: #6e9994;
  --rail-shadow: #203c40;
  --rod-highlight: #fff4c8;
  --rod-main: #ffc36d;
  --rod-shadow: #9d6d2c;
  --flux-fill-strong: #62e7d04a;
  --flux-fill-soft: #74b9ff12;
  --flux-edge-color: #62e7d025;
  --field-arrow: #74b9ff;
  --field-arrow-soft: #74b9ff45;
  --current: #ffc36d;
  --current-soft: #ffc36d2b;
  --motion-arrow: #9a86ff;
  --chart-grid: #94ddd420;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    radial-gradient(circle at 8% 8%, var(--wash-a), transparent 31rem),
    radial-gradient(circle at 86% 13%, var(--wash-b), transparent 28rem),
    var(--bg);
  background-size: var(--grid-size) var(--grid-size), var(--grid-size) var(--grid-size), auto, auto, auto;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  transition: color 0.24s, background-color 0.24s;
}

button,
input {
  font: inherit;
}

button,
summary,
input[type="range"] {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.shell {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 92px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  color: #fffaf0;
  background: var(--green);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--green) 20%, transparent);
  font: 800 13px/1 ui-monospace, monospace;
}

html[data-theme="dark"] .brand-mark,
html[data-theme="dark"] .button-primary {
  color: #032018;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 14px;
  letter-spacing: 0.02em;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font: 500 9px/1.2 ui-monospace, monospace;
  letter-spacing: 0.08em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.home-link {
  color: var(--muted);
  font-size: 12px;
}

.home-link:hover {
  color: var(--green);
}

.theme-switcher {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--ink) 5%, transparent);
}

.theme-option {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 54px;
  height: 30px;
  padding: 0 9px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: 11px;
}

.theme-option:hover {
  color: var(--green);
}

html[data-theme-mode="auto"] .theme-option[data-theme-option="auto"],
html[data-theme-mode="light"] .theme-option[data-theme-option="light"],
html[data-theme-mode="dark"] .theme-option[data-theme-option="dark"] {
  color: #fffaf0;
  background: var(--green);
}

html[data-theme="dark"][data-theme-mode="auto"] .theme-option[data-theme-option="auto"],
html[data-theme="dark"][data-theme-mode="light"] .theme-option[data-theme-option="light"],
html[data-theme="dark"][data-theme-mode="dark"] .theme-option[data-theme-option="dark"] {
  color: #032018;
}

.theme-option > span:first-child {
  font: 700 11px/1 ui-monospace, monospace;
}

.theme-option-label {
  font-size: 9px;
  font-weight: 700;
}

.tool-page {
  padding: 64px 0 80px;
}

.tool-heading {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: end;
  gap: 64px;
  margin-bottom: 30px;
}

.category-code {
  color: var(--violet);
  font: 750 9px/1 ui-monospace, monospace;
  letter-spacing: 0.16em;
}

.tool-heading h1 {
  margin: 14px 0 0;
  color: var(--ink);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", Georgia, serif;
  font-size: clamp(38px, 5.2vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.06em;
}

.tool-heading p {
  margin: 0 0 5px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.9;
}

.experiment-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.experiment-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 58px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
}

.state-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
}

.state-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--violet) 12%, transparent);
}

.state-pill.is-playing .state-dot {
  background: var(--green);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 13%, transparent), 0 0 15px var(--green);
}

.model-note {
  color: var(--muted);
  font: 500 9px/1.4 ui-monospace, monospace;
  letter-spacing: 0.05em;
}

.experiment-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.58fr) minmax(300px, 0.72fr);
  min-height: 590px;
}

.stage-column {
  min-width: 0;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.stage-frame {
  position: relative;
  overflow: hidden;
  height: 100%;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(circle at 72% 22%, color-mix(in srgb, var(--violet) 8%, transparent), transparent 16rem),
    radial-gradient(circle at 22% 78%, color-mix(in srgb, var(--green) 9%, transparent), transparent 19rem),
    var(--stage-bg);
}

#experimentSvg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 470px;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.stage-frame.is-view-dragging #experimentSvg {
  cursor: grabbing;
}

#orbitScene {
  will-change: transform;
}

.ground-shadow {
  fill: var(--stage-shadow);
  filter: blur(12px);
}

.rail-plane {
  stroke: var(--line);
  stroke-width: 1.5;
  filter: url(#softShadow);
}

.flux-area {
  stroke: color-mix(in srgb, var(--green) 42%, transparent);
  stroke-width: 1.5;
  transition: opacity 0.18s;
}

.flux-edge {
  fill: var(--flux-edge-color);
}

.rail {
  stroke-linecap: round;
}

.rail-shadow-line {
  stroke: var(--rail-shadow);
  stroke-width: 18;
  opacity: 0.44;
  transform: translateY(7px);
}

.rail-main-line {
  stroke: url(#railGradient);
  stroke-width: 15;
  filter: drop-shadow(0 5px 4px var(--stage-shadow));
}

.source-cable {
  fill: none;
  stroke: var(--rail-main);
  stroke-width: 8;
  stroke-linecap: round;
}

.source rect {
  fill: var(--panel);
  stroke: var(--line-strong);
  stroke-width: 1.5;
  filter: drop-shadow(0 8px 10px var(--stage-shadow));
}

.source path {
  fill: none;
  stroke: var(--violet);
  stroke-width: 4;
  stroke-linecap: round;
}

.source text {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.field-arrow line,
.field-key line {
  stroke: var(--field-arrow-soft);
  stroke-width: 2;
}

.field-arrow.active line {
  stroke: var(--field-arrow);
  stroke-width: 3;
  filter: drop-shadow(0 0 6px var(--field-arrow));
}

.field-arrow circle {
  fill: var(--field-arrow);
  opacity: 0.1;
}

.field-arrow.active circle {
  opacity: 0.38;
}

.field-key text {
  fill: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.current-path {
  fill: none;
  stroke: var(--current-soft);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.current-particle {
  fill: var(--current);
  filter: url(#currentGlow);
}

.rod-shadow {
  stroke: var(--stage-shadow);
  stroke-width: 26;
  stroke-linecap: round;
  transform: translateY(12px);
}

.rod {
  stroke: url(#rodGradient);
  stroke-width: 22;
  stroke-linecap: round;
  filter: drop-shadow(0 7px 8px var(--stage-shadow));
  cursor: ew-resize;
  touch-action: none;
}

.rod.is-dragging {
  cursor: ew-resize;
}

.rod-handle circle {
  fill: var(--gold);
  stroke: var(--panel);
  stroke-width: 4;
  filter: drop-shadow(0 0 9px var(--gold));
  pointer-events: none;
}

.rod-labels text,
.fixed-labels text {
  fill: var(--ink);
  font-family: Georgia, serif;
  font-size: 18px;
  font-style: italic;
  font-weight: 700;
}

.motion-vector line {
  stroke: var(--motion-arrow);
  stroke-width: 3;
}

.motion-vector text {
  fill: var(--violet);
  font: 700 12px/1 ui-monospace, monospace;
}

.view-hud {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.view-readout {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 7px 11px 7px 8px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--panel) 84%, transparent);
  box-shadow: 0 9px 26px color-mix(in srgb, var(--ink) 7%, transparent);
  backdrop-filter: blur(12px);
}

.view-icon {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  border-radius: 9px;
  color: var(--violet);
  background: color-mix(in srgb, var(--violet) 10%, transparent);
  font: 700 15px/1 ui-monospace, monospace;
}

.view-readout b,
.view-readout output {
  display: block;
  white-space: nowrap;
}

.view-readout b {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 8px;
}

.view-readout output {
  color: var(--ink-soft);
  font: 700 9px/1.2 ui-monospace, monospace;
}

.view-hud button {
  min-height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  backdrop-filter: blur(12px);
  pointer-events: auto;
  font-size: 9px;
  font-weight: 700;
}

.view-hud button:hover {
  border-color: color-mix(in srgb, var(--violet) 50%, transparent);
  color: var(--violet);
}

.stage-legend {
  position: absolute;
  right: 18px;
  bottom: 16px;
  left: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  backdrop-filter: blur(12px);
  font-size: 10px;
}

.stage-legend span,
.chart-key span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-flux,
.legend-current {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.legend-flux {
  background: var(--green);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 10%, transparent);
}

.legend-current {
  background: var(--current);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--current) 10%, transparent);
}

.drag-hint {
  margin-left: auto;
  color: var(--violet);
  font-weight: 700;
}

.control-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
  padding: 24px;
  background: color-mix(in srgb, var(--field) 56%, transparent);
}

.primary-readouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.readout {
  position: relative;
  overflow: hidden;
  min-width: 0;
  min-height: 124px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.readout::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  content: "";
  background: linear-gradient(90deg, var(--metric-accent), transparent 78%);
}

.readout-flux {
  --metric-accent: var(--green);
}

.readout-current {
  --metric-accent: var(--current);
}

.readout-label,
.readout-trend {
  display: block;
}

.readout-label {
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 700;
}

.readout strong {
  display: block;
  margin: 12px 0 8px;
  color: var(--ink);
  font: 700 25px/1 ui-monospace, monospace;
  letter-spacing: -0.05em;
  white-space: nowrap;
}

.readout strong small {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0;
}

.readout-trend {
  color: var(--muted);
  font-size: 9px;
  line-height: 1.35;
}

.secondary-readouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--line);
}

.secondary-readouts div {
  min-width: 0;
  padding: 12px 10px;
  background: var(--field);
}

.secondary-readouts span,
.secondary-readouts strong {
  display: block;
}

.secondary-readouts span {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 8px;
}

.secondary-readouts strong {
  color: var(--ink-soft);
  font: 700 10px/1.2 ui-monospace, monospace;
  white-space: nowrap;
}

.playback-controls {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 9px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 16px;
  border: 0;
  border-radius: 13px;
  font-size: 12px;
  font-weight: 750;
  transition: transform 0.18s, border-color 0.18s, background 0.18s;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fffaf0;
  background: var(--green);
  box-shadow: 0 16px 38px color-mix(in srgb, var(--green) 18%, transparent);
}

.button-secondary {
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--surface) 66%, transparent);
}

.button-secondary:hover {
  border-color: color-mix(in srgb, var(--green) 48%, transparent);
  color: var(--green);
}

.position-control {
  display: block;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.position-control > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.position-control b {
  color: var(--ink-soft);
  font-size: 10px;
}

.position-control output {
  color: var(--violet);
  font: 700 11px/1 ui-monospace, monospace;
}

.position-control input {
  width: 100%;
  margin: 14px 0 8px;
  accent-color: var(--violet);
}

.position-control small {
  color: var(--muted);
  font-size: 8px;
}

.observation {
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 12px;
  min-height: 74px;
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--green) 24%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--green) 6%, var(--panel));
}

.observation-symbol {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  color: var(--green);
  background: color-mix(in srgb, var(--green) 10%, transparent);
  font-family: Georgia, serif;
  font-size: 18px;
  font-style: italic;
}

.observation p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.65;
}

.parameter-panel {
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.parameter-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 45px;
  padding: 0 15px;
  list-style: none;
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 700;
}

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

.parameter-panel summary span {
  color: var(--violet);
  transition: transform 0.18s;
}

.parameter-panel[open] summary {
  border-bottom: 1px solid var(--line);
}

.parameter-panel[open] summary span {
  transform: rotate(180deg);
}

.parameter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
  padding: 14px;
}

.parameter-grid label {
  position: relative;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
}

.parameter-grid input {
  width: 100%;
  height: 36px;
  margin-top: 6px;
  padding: 0 28px 0 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  background: var(--field);
  font-size: 11px;
}

.parameter-grid em {
  position: absolute;
  right: 9px;
  bottom: 10px;
  color: var(--muted);
  font: 500 8px/1 ui-monospace, monospace;
}

.trend-panel {
  padding: 28px 30px 22px;
  border-top: 1px solid var(--line);
}

.trend-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
}

.trend-heading h2 {
  margin: 8px 0 0;
  color: var(--ink);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", Georgia, serif;
  font-size: 25px;
  letter-spacing: -0.04em;
}

.chart-key {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 10px;
}

#trendChart {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart-grid-line {
  stroke: var(--chart-grid);
  stroke-width: 1;
}

.chart-axis {
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.chart-curve {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-flux {
  stroke: var(--green);
}

.chart-current {
  stroke: var(--current);
}

.time-marker {
  stroke: var(--violet);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.chart-point {
  stroke: var(--panel);
  stroke-width: 3;
  filter: drop-shadow(0 0 6px currentColor);
}

.chart-flux-point {
  fill: var(--green);
  color: var(--green);
}

.chart-current-point {
  fill: var(--current);
  color: var(--current);
}

.chart-labels text {
  fill: var(--muted);
  font: 600 10px/1 ui-monospace, monospace;
}

.formula-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  background: var(--field);
}

.formula-strip span {
  min-width: 0;
  padding: 17px 20px;
  color: var(--ink-soft);
  font: 600 10px/1.5 ui-monospace, monospace;
  text-align: center;
}

.formula-strip span + span {
  border-left: 1px solid var(--line);
}

.formula-strip b {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font: 700 8px/1 ui-sans-serif, sans-serif;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 37px 0 45px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer strong,
.footer span {
  display: block;
}

.footer strong {
  color: var(--ink-soft);
  font-size: 12px;
}

.footer span,
.footer p {
  margin: 5px 0 0;
  font: 500 9px/1.5 ui-monospace, monospace;
  letter-spacing: 0.06em;
}

@media (max-width: 960px) {
  .tool-heading {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .stage-column {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stage-frame {
    min-height: 0;
  }

  .control-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .primary-readouts,
  .secondary-readouts,
  .parameter-panel {
    grid-column: 1 / -1;
  }

  .observation {
    min-height: 100%;
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(calc(100% - 28px), 1120px);
  }

  .nav {
    height: 76px;
  }

  .brand-mark {
    width: 35px;
    height: 35px;
  }

  .home-link {
    display: none;
  }

  .theme-option {
    width: 33px;
    min-width: 33px;
    height: 29px;
    padding: 0;
  }

  .theme-option-label {
    position: absolute;
    overflow: hidden;
    width: 1px;
    height: 1px;
    clip-path: inset(50%);
  }

  .tool-page {
    padding: 46px 0 58px;
  }

  .tool-heading h1 {
    font-size: clamp(37px, 12vw, 54px);
  }

  .experiment-topline {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 17px;
  }

  .stage-column,
  .control-column {
    padding: 14px;
  }

  #experimentSvg {
    min-height: 350px;
  }

  .stage-legend {
    right: 10px;
    bottom: 10px;
    left: 10px;
    gap: 10px;
    padding: 0 10px;
  }

  .view-hud {
    top: 10px;
    left: 10px;
  }

  .view-readout {
    min-height: 38px;
    padding: 5px 8px 5px 6px;
  }

  .view-icon {
    width: 26px;
    height: 26px;
  }

  .view-hud button {
    min-height: 32px;
    padding: 0 8px;
  }

  .drag-hint {
    display: none !important;
  }

  .control-column {
    display: flex;
  }

  .primary-readouts {
    grid-template-columns: 1fr 1fr;
  }

  .readout {
    min-height: 114px;
    padding: 14px;
  }

  .readout strong {
    font-size: 21px;
  }

  .trend-panel {
    padding: 24px 14px 16px;
  }

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

  .formula-strip {
    grid-template-columns: 1fr 1fr;
  }

  .formula-strip span:nth-child(3) {
    border-left: 0;
  }

  .formula-strip span:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 430px) {
  .brand small {
    display: none;
  }

  .primary-readouts,
  .playback-controls,
  .parameter-grid {
    grid-template-columns: 1fr;
  }

  .secondary-readouts {
    grid-template-columns: 1fr;
  }

  .stage-legend span:nth-child(2) {
    display: none;
  }

  .formula-strip {
    grid-template-columns: 1fr;
  }

  .formula-strip span + span,
  .formula-strip span:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}