/* Newton sim: an index card from shafe.dev over a sheet of graph paper */

:root {
  --page: #1E2A5A;
  --on-page: #FCFCF8;
  --on-page-muted: #AAB4DC;
  --card: #FCFCF8;
  --sheet: #FCFCF8;
  --inset: #F3F6FC;
  --text: #1A1D33;
  --muted: #5B6280;
  --ink: #1E2A5A;
  --on-ink: #FCFCF8;
  --ink-hover: #2A3A78;
  --rule: #C9D7EF;
  --accent: #E0353B;
  --red-text: #C42A31;
  --amber: #B7791F;
  --chip: rgba(252, 252, 248, 0.92);
  --shadow: 0 18px 40px rgba(8, 12, 40, 0.4);
  --chip-shadow: 0 2px 8px rgba(8, 12, 40, 0.12);
  --font: 'Bricolage Grotesque', 'Avenir Next', 'Segoe UI', system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'Roboto Mono', Menlo, Consolas, monospace;
  --fast: 120ms;
  --med: 200ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --gutter: clamp(12px, 3vw, 40px);
  --panel-w: 360px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --page: #0E1638;
  --card: #16295F;
  --sheet: #13265A;
  --inset: #1B3170;
  --text: #E8ECF8;
  --muted: #AAB4DC;
  --ink: #FCFCF8;
  --on-ink: #13265A;
  --ink-hover: #DDE3F5;
  --rule: #2D4A8A;
  --accent: #FF6B70;
  --red-text: #FF8A80;
  --amber: #F0B95A;
  --chip: rgba(19, 38, 90, 0.92);
  --shadow: none;
  --chip-shadow: none;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

html,
body {
  margin: 0;
  height: 100%;
  background: var(--page);
}

body {
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
}

button,
input,
select { font: inherit; color: inherit; }

button { cursor: pointer; }
button:disabled { cursor: default; opacity: 0.4; }

svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  box-shadow: 0 0 0 3px var(--card);
}

[hidden] { display: none !important; }

.srOnly {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.phoneOnly { display: none !important; }

/* ---------- header strip ---------- */

.strip {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 52px;
  padding: 0 var(--gutter);
  color: var(--on-page);
}

.back {
  margin-right: 16px;
  color: var(--on-page-muted);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 3px;
  text-underline-offset: 5px;
  transition: color var(--fast), text-decoration-color var(--fast);
}

.back:hover { color: var(--on-page); text-decoration-color: var(--accent); }

.appName {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  font-stretch: 80%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stripSpacer { flex: 1; }

.stripBtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 14px;
  border: 2px solid var(--on-page);
  border-radius: 999px;
  background: transparent;
  color: var(--on-page);
  font-size: 14px;
  font-weight: 600;
  transition: background-color var(--fast), color var(--fast);
}

.stripBtn svg { width: 16px; height: 16px; }
.stripBtn.round { width: 34px; padding: 0; justify-content: center; font-size: 16px; }
.stripBtn:hover { background: var(--on-page); color: #1E2A5A; }

/* ---------- the card ---------- */

.card {
  margin: 0 var(--gutter) 16px;
  background: var(--card);
  border-radius: 6px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
}

:root[data-theme="dark"] .card { border: 1px solid var(--rule); }

.cardHead {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 60px;
  padding: 8px 12px 8px 20px;
  border-bottom: 4px solid var(--accent);
  min-width: 0;
}

.scenePick {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.1;
  font-weight: 800;
  font-stretch: 80%;
  white-space: nowrap;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
  transition: text-decoration-color var(--fast);
}

.scenePick #sceneTitle { overflow: hidden; text-overflow: ellipsis; }
.scenePick:hover,
.scenePick[aria-expanded="true"] { text-decoration-color: var(--accent); }
.scenePick .caret { font-size: 16px; color: var(--muted); }
.scenePick.pulse .caret { animation: pulse 1.2s var(--ease) 2; }

@keyframes pulse {
  50% { color: var(--accent); }
}

.transport {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex: none;
}

.iconBtn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 22px;
  line-height: 1;
  transition: background-color var(--fast), color var(--fast);
}

.iconBtn:hover { background: var(--ink); color: var(--on-ink); }
.iconBtn:active, .playBtn:active, .btn:active { transform: translateY(1px); }
.iconBtn.small { width: 40px; height: 40px; background: var(--chip); box-shadow: var(--chip-shadow); }
.iconBtn.small:hover { background: var(--ink); }

.playBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 104px;
  height: 40px;
  padding: 0 16px 0 12px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-ink);
  font-size: 15px;
  font-weight: 600;
  transition: background-color var(--fast);
}

.playBtn:hover { background: var(--ink-hover); border-color: var(--ink-hover); }
.playBtn .iconPlay { display: none; }
.paused .playBtn .iconPlay { display: block; }
.paused .playBtn .iconPause { display: none; }

.speedSeg {
  display: flex;
  height: 34px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  overflow: hidden;
}

.speedSeg button {
  min-width: 40px;
  padding: 0 8px;
  border: 0;
  border-left: 1px solid var(--rule);
  background: none;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.speedSeg button:first-child { border-left: 0; }
.speedSeg button[aria-checked="true"] { background: var(--ink); color: var(--on-ink); }

.speedChip {
  display: none;
  min-width: 52px;
  height: 40px;
  padding: 0 10px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.speedChip:hover { background: var(--inset); }

/* canvas over the chart in column 1; settings down the whole of column 2 */
.cardBody {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--panel-w);
  grid-template-rows: minmax(0, 1fr) 210px;
  grid-template-areas: "stage panel" "energy panel";
  min-height: 0;
}

.card.panelClosed .cardBody { grid-template-columns: minmax(0, 1fr) 0; }
.card.panelClosed .panel { display: none; }

/* ---------- stage ---------- */

.stage {
  grid-area: stage;
  position: relative;
  min-height: 0;
  min-width: 0;
  background: var(--sheet);
  overflow: hidden;
}

#sim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  outline: none;
  cursor: default;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#sim:focus-visible { box-shadow: inset 0 0 0 3px var(--accent); }
#sim.tool-grab { cursor: grab; }
#sim.tool-grab.over { cursor: pointer; }
#sim.dragging { cursor: grabbing; }
#sim.tool-build { cursor: crosshair; }
#sim.tool-pin { cursor: cell; }
#sim.tool-snip { cursor: crosshair; }

.fade { animation: fadeIn 300ms var(--ease); }
@keyframes fadeIn { from { opacity: 0.4; } }

.rail {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 3px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 14px;
  box-shadow: var(--chip-shadow);
  z-index: 3;
}

.tool {
  display: grid;
  place-items: center;
  gap: 0;
  width: 48px;
  height: 48px;
  padding: 4px 0 2px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
}

@media (hover: hover) {
  .tool:hover:not(:disabled) { background: var(--inset); }
}
.tool[aria-pressed="true"],
.tool[aria-pressed="true"]:hover { background: var(--ink); color: var(--on-ink); }
.railRule { height: 2px; margin: 2px 6px; background: var(--rule); border-radius: 2px; }

.modeChip {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100% - 330px);
  padding: 7px 12px 7px 14px;
  border: 0;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: 999px;
  font-size: 13px;
  z-index: 3;
  box-shadow: var(--chip-shadow);
  text-align: left;
}

.modeChip { width: max-content; max-width: min(560px, calc(100% - 330px)); border-radius: 18px; line-height: 1.35; }
.modeChip span:not(.modeX) { opacity: 0.9; }
.modeChip strong { white-space: nowrap; }
.modeX { font-size: 18px; line-height: 1; padding-left: 4px; }

.buildBar {
  position: absolute;
  top: 12px;
  left: 78px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  max-width: calc(100% - 300px);
  margin-top: 46px;
  padding: 6px 10px;
  background: var(--chip);
  border: 2px solid var(--ink);
  border-radius: 14px;
  box-shadow: var(--chip-shadow);
  font-size: 13px;
  z-index: 3;
}

.seg {
  display: inline-flex;
  align-items: center;
  border: 2px solid var(--ink);
  border-radius: 999px;
  overflow: hidden;
  flex: none;
}

.seg .segLabel { padding: 0 8px 0 10px; font-weight: 600; color: var(--muted); }
.seg button {
  height: 28px;
  padding: 0 10px;
  border: 0;
  border-left: 1px solid var(--rule);
  background: transparent;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}
.seg button[aria-checked="true"] { background: var(--ink); color: var(--on-ink); }
.seg button:focus-visible,
.segRow button:focus-visible,
.chartView button:focus-visible,
.speedSeg button:focus-visible { outline-offset: -4px; box-shadow: none; }

.check { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; flex: none; }
.check input { width: 18px; height: 18px; accent-color: var(--ink); }

/* HUD, top right */
.hud {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  z-index: 2;
  pointer-events: none;
}

.chip {
  padding: 4px 10px;
  background: var(--chip);
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  white-space: nowrap;
  box-shadow: var(--chip-shadow);
}

.chip.warn { border: 1.5px solid var(--amber); font-weight: 600; }
.chip.warn.bad { border-color: var(--accent); }
.chip.clickable { pointer-events: auto; cursor: pointer; }
.chip.clickable:hover { border-color: var(--ink); }

.stamp {
  padding: 2px 8px;
  border: 2px solid var(--red-text);
  border-radius: 4px;
  background: var(--chip);
  color: var(--red-text);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transform: rotate(-4deg);
}

.stageBtns {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.pill {
  height: 36px;
  padding: 0 14px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-ink);
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--chip-shadow);
}

.keyChip {
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--chip);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--chip-shadow);
}

.keyChip:hover { border-color: var(--ink); }

.keyCard {
  position: absolute;
  right: 12px;
  bottom: 60px;
  width: 240px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 10px;
  box-shadow: var(--chip-shadow);
  font-size: 13px;
  z-index: 4;
}

.keyCard .ramp { height: 8px; border-radius: 4px; margin: 6px 0 2px; }
.keyCard .rampLabels { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.keyCard ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.keyCard li { display: flex; align-items: center; gap: 8px; }
.keyCard svg { width: 26px; height: 14px; }

.bigPlay {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  justify-items: center;
  gap: 10px;
  max-width: min(360px, calc(100% - 32px));
  padding: 18px 22px;
  border: 2px solid var(--ink);
  border-radius: 16px;
  background: var(--chip);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--chip-shadow);
  z-index: 3;
}

.bigPlay svg { width: 56px; height: 56px; }

.notice,
.empty {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(360px, calc(100% - 32px));
  padding: 18px 20px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 5;
}

.empty { border: 0; background: var(--chip); box-shadow: var(--chip-shadow); text-align: center; z-index: 1; pointer-events: none; }
.empty button { pointer-events: auto; }
.empty .noticeBtns { justify-content: center; }
.notice h3,
.empty h3 { margin: 0 0 8px; font-size: 22px; font-weight: 800; font-stretch: 80%; color: var(--ink); }
.notice h3 { padding-bottom: 8px; border-bottom: 4px solid var(--accent); }
.notice p,
.empty p { margin: 0 0 12px; font-size: 15px; line-height: 1.45; }
.empty p { color: var(--muted); }
.noticeBtns { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 10px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  transition: background-color var(--fast), color var(--fast);
}

.btn:hover { background: var(--ink); color: var(--on-ink); }
.btn.primary { background: var(--ink); color: var(--on-ink); }
.btn.primary:hover { background: var(--ink-hover); border-color: var(--ink-hover); }
.btn.small { height: 34px; padding: 0 12px; font-size: 14px; }

.linkBtn {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.linkBtn:hover { color: var(--accent); }

.fine { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.4; }

.tip {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: max-content;
  max-width: min(380px, calc(100% - 32px));
  padding: 12px 40px 12px 16px;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: 4;
  animation: fadeIn 300ms var(--ease) 600ms backwards;
}

.tip p { margin: 0 0 10px; font-size: 14px; font-weight: 600; line-height: 1.4; }
.tipBtns { display: flex; align-items: center; gap: 14px; }
.tip .btn.primary { background: var(--on-ink); color: var(--ink); border-color: var(--on-ink); height: 30px; }
.tip .linkBtn { color: var(--on-ink); opacity: 0.85; font-size: 13px; }
.tipX { position: absolute; top: 6px; right: 6px; width: 28px; height: 28px; border: 0; border-radius: 50%; background: none; color: inherit; font-size: 18px; }
.tipX:hover { background: rgba(255, 255, 255, 0.15); }

.toast {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: calc(100% - 32px);
  padding: 8px 8px 8px 16px;
  background: var(--ink);
  color: var(--on-ink);
  border-radius: 999px;
  font-size: 13px;
  box-shadow: var(--shadow);
  z-index: 6;
}

.toast span { padding: 4px 0; }
.toast button {
  flex: none;
  height: 30px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font-size: 13px;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.toast button:hover { background: rgba(255, 255, 255, 0.15); }

/* ---------- energy chart ---------- */

.energy {
  grid-area: energy;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  padding: 0 12px 8px 14px;
  border-top: 2px solid var(--rule);
  background: var(--card);
}

.energyHead {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 40px;
  border-bottom: 2px solid var(--rule);
}

.energyHead h2 { margin: 0; font-size: 18px; font-weight: 800; font-stretch: 80%; color: var(--ink); }
.chartView { display: flex; border: 1.5px solid var(--ink); border-radius: 999px; overflow: hidden; }
.chartView button { height: 26px; padding: 0 10px; border: 0; border-left: 1px solid var(--rule); background: none; font-size: 12px; font-weight: 600; white-space: nowrap; }
.chartView button:first-child { border-left: 0; }
.chartView button[aria-checked="true"] { background: var(--ink); color: var(--on-ink); }
.errChip {
  margin-left: auto;
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.errChip.bad { border: 1.5px solid var(--accent); font-weight: 700; }

.legend { display: flex; flex-wrap: nowrap; gap: 4px 6px; padding: 6px 0 2px; overflow-x: auto; scrollbar-width: thin; }
.legend > * { flex: none; }
.legend button,
.legend span.lg {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 9px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--card);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.legend button[aria-pressed="false"] { opacity: 0.4; text-decoration: line-through; }
.legend .v { font-size: 13px; }
.legend svg { width: 16px; height: 6px; }

.plotWrap { position: relative; flex: 1; min-height: 60px; }
#chart { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.energyNote { margin: 4px 2px 0; font-size: 12px; color: var(--muted); line-height: 1.35; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- panel ---------- */

.panel {
  grid-area: panel;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-left: 2px solid var(--rule);
  background: var(--card);
}

.peek { display: none; }

.inspector {
  flex: none;
  max-height: 48%;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 12px 18px 8px;
  border-bottom: 2px solid var(--rule);
  background: var(--inset);
}

.inspHead { display: flex; align-items: center; gap: 8px; margin-bottom: 2px; }
.inspHead h3 { margin: 0; font-size: 18px; font-weight: 800; font-stretch: 80%; color: var(--ink); }
.badge { font-size: 11px; font-weight: 700; padding: 2px 8px; border: 1px solid var(--muted); border-radius: 999px; color: var(--muted); }
.inspHead .iconBtn { margin-left: auto; width: 30px; height: 30px; font-size: 18px; border-width: 1.5px; }
.inspLive { margin: 0 0 6px; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.inspBtns { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 4px; }
.fbdTable { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; margin: 2px 0 6px; }
.fbdTable caption { text-align: left; font-size: 12px; color: var(--muted); padding-bottom: 2px; }
.fbdTable td { padding: 3px 4px 3px 0; border-top: 1px solid var(--rule); vertical-align: baseline; }
.fbdTable td.num { text-align: right; white-space: nowrap; }
.fbdTable td.muted { color: var(--muted); font-size: 12px; }
.fbdTable tr.sub td:first-child { padding-left: 14px; color: var(--muted); }
.fbdTable tr.net td { font-weight: 700; border-top: 1.5px solid var(--ink); }
.dir { display: inline-block; width: 14px; text-align: center; color: var(--ink); }

.tabs {
  flex: none;
  display: flex;
  border-bottom: 1px solid var(--rule);
  padding: 0 8px;
}

.tabs button {
  flex: 1;
  height: 44px;
  padding: 0 6px;
  border: 0;
  border-bottom: 3px solid transparent;
  background: none;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  transition: color var(--fast), border-color var(--med) var(--ease);
}

.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs button:hover { color: var(--ink); }

.tabBody {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 4px 20px 20px;
}

.tabBody h3 {
  margin: 18px 0 4px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--rule);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.panelKeys { flex: none; margin: 0; padding: 8px 20px; border-top: 1px solid var(--rule); font-size: 12px; color: var(--muted); }

.sceneHead { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 10px; margin: 14px 0 6px; }
.sceneName { margin: 0; font-size: 24px; line-height: 1.05; font-weight: 800; font-stretch: 80%; color: var(--ink); }
.sceneBlurb { margin: 0 0 4px; font-size: 15px; line-height: 1.45; }

.try {
  margin: 14px 0 6px;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--inset);
  border-radius: 0 6px 6px 0;
}

.try .tryLabel { display: block; margin-bottom: 4px; font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--red-text); }
.try p { margin: 0 0 10px; font-size: 15px; line-height: 1.4; }
.try p:last-child { margin-bottom: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }

details.more { margin: 8px 0 0; font-size: 14px; }
details.more summary { cursor: pointer; color: var(--muted); font-weight: 600; }
details.more ul { margin: 8px 0 0; padding-left: 18px; line-height: 1.45; }
details.more li { margin-bottom: 8px; }
details.more .chips { margin-top: 6px; }

.chipBtn {
  height: 34px;
  padding: 0 12px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  transition: background-color var(--fast), color var(--fast);
}

.chipBtn:hover,
.chipBtn[aria-pressed="true"] { background: var(--ink); color: var(--on-ink); }

/* a control row: label + value on top, input below */
.row { padding: 10px 0; border-bottom: 1px solid var(--rule); }
.row:last-child { border-bottom: 0; }
.rowTop { display: flex; align-items: baseline; gap: 8px; }
.rowTop label, .rowTop .lbl { font-size: 14px; font-weight: 500; }
.rowTop .val {
  margin-left: auto;
  padding: 1px 4px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: none;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  text-align: right;
  min-width: 64px;
}
.rowTop .val:hover { border-color: var(--rule); }
.rowTop input.val { width: 96px; border-color: var(--ink); background: var(--card); }
.reset {
  width: 22px;
  height: 22px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--muted);
  font-size: 14px;
  line-height: 1;
}
.reset:hover { color: var(--accent); }
.help { margin: 3px 0 0; font-size: 12px; color: var(--muted); line-height: 1.4; }
.help.ok::before { content: '● '; color: #2E8B57; }
.help.amber { color: var(--text); }
.help.amber::before { content: '● '; color: var(--amber); }
.warnNote { margin: 8px 0 0; padding: 8px 10px; border: 1.5px solid var(--accent); border-radius: 6px; font-size: 13px; line-height: 1.4; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 26px;
  margin: 4px 0 0;
  background: transparent;
  --fill: 50%;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--ink) var(--fill), var(--rule) var(--fill));
}
input[type="range"]::-moz-range-track { height: 4px; border-radius: 2px; background: var(--rule); }
input[type="range"]::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--ink); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -7px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--card);
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--card);
}

.select {
  width: 100%;
  height: 36px;
  margin-top: 6px;
  padding: 0 10px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--card);
  font-size: 14px;
}

.switchRow { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 28px; padding: 0; border: 0; background: none; text-align: left; }
.switchRow .lbl { flex: 1; font-size: 14px; font-weight: 500; }
.switch {
  position: relative;
  flex: none;
  width: 38px;
  height: 22px;
  border: 2px solid var(--muted);
  border-radius: 999px;
  background: var(--inset);
  transition: background-color var(--fast), border-color var(--fast);
}
.switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform var(--fast) var(--ease), background-color var(--fast);
}
[aria-checked="true"] > .switch { background: var(--ink); border-color: var(--ink); }
[aria-checked="true"] > .switch::after { transform: translateX(16px); background: var(--on-ink); }

.force { border-bottom: 1px solid var(--rule); padding: 10px 0; }
.force:last-child { border-bottom: 0; }
.force .switchRow .lbl { font-size: 15px; font-weight: 700; color: var(--ink); }
.formula { margin: 2px 0 0 48px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.formula code { font-family: var(--mono); font-size: 11.5px; }
.forceBody { margin: 4px 0 0 48px; }
.forceBody .row { padding: 8px 0; }
.forceBody .row:last-child { padding-bottom: 0; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.presets .chipBtn { height: 28px; padding: 0 10px; font-size: 12px; border-width: 1.5px; }
details.adv summary { margin-top: 6px; cursor: pointer; font-size: 13px; color: var(--muted); font-weight: 600; }

.radioCards { display: grid; gap: 6px; margin-top: 6px; }
.radioCard {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 2px 8px;
  padding: 9px 12px;
  border: 1.5px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  text-align: left;
}
.radioCard:hover { border-color: var(--ink); }
.radioCard[aria-checked="true"] { border: 2px solid var(--ink); box-shadow: inset 4px 0 0 var(--accent); padding: 8.5px 11.5px; }
.radioCard .key { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.radioCard strong { font-size: 15px; color: var(--ink); }
.radioCard .badge { justify-self: end; }
.radioCard .note { grid-column: 1 / -1; font-size: 12px; color: var(--muted); line-height: 1.4; }

.segRow { display: flex; margin-top: 6px; border: 2px solid var(--ink); border-radius: 999px; overflow: hidden; }
.segRow button { flex: 1; min-width: 0; height: 32px; padding: 0 6px; border: 0; border-left: 1px solid var(--rule); background: none; font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.segRow button:first-child { border-left: 0; }
.segRow button[aria-checked="true"] { background: var(--ink); color: var(--on-ink); }

.subChecks { display: flex; gap: 16px; margin-top: 8px; font-size: 14px; }
.subChecks label { display: inline-flex; align-items: center; gap: 6px; }
.subChecks input { width: 18px; height: 18px; accent-color: var(--ink); }

.readouts { margin: 8px 0 0; padding: 0; list-style: none; font-size: 13px; font-variant-numeric: tabular-nums; }
.readouts li { padding: 3px 0; }

.code {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: var(--inset);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  color: var(--text);
}

.panelFoot { margin: 22px 0 0; font-size: 13px; color: var(--muted); line-height: 1.6; }
.panelFoot a { color: inherit; }

/* ---------- picker, modals ---------- */

.picker,
.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(8, 12, 40, 0.55);
  z-index: 20;
}

.pickerCard,
.modalCard {
  width: min(820px, 100%);
  max-height: min(88dvh, 820px);
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-radius: 6px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modalCard { width: min(580px, 100%); }
.modalCard.narrow { width: min(460px, 100%); }

.pickerHead,
.modalHead {
  display: flex;
  align-items: center;
  padding: 14px 16px 10px 22px;
  border-bottom: 4px solid var(--accent);
}

.pickerHead h2,
.modalHead h2 { margin: 0; font-size: 28px; font-weight: 800; font-stretch: 80%; color: var(--ink); }
.pickerHead .iconBtn,
.modalHead .iconBtn { margin-left: auto; }

.pickerGrid { overflow: auto; overscroll-behavior: contain; padding: 4px 22px 22px; }
.pickerGrid h3 {
  margin: 18px 0 8px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--rule);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.pickerRow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }

.sceneCard {
  display: flex;
  flex-direction: column;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--inset);
  text-align: left;
  overflow: hidden;
  transition: border-color var(--fast);
}
.sceneCard:hover { border: 1px solid var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.sceneCard[aria-current="true"] { border: 1px solid var(--ink); box-shadow: inset 0 0 0 1px var(--ink), inset 4px 0 0 var(--accent); }
.sceneCard canvas { display: block; width: 100%; height: 96px; background: var(--sheet); border-bottom: 1px solid var(--rule); }
.sceneCard strong { padding: 8px 10px 0; font-size: 15px; color: var(--ink); }
.sceneCard span { padding: 2px 10px 10px; font-size: 12px; color: var(--muted); line-height: 1.3; }

.modalBody { overflow: auto; padding: 6px 22px 22px; font-size: 15px; line-height: 1.5; }
.modalBody h3 { margin: 18px 0 8px; padding-bottom: 4px; border-bottom: 2px solid var(--rule); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.modalBody a { color: var(--ink); font-weight: 600; }
.keys { width: 100%; border-collapse: collapse; font-size: 14px; }
.keys th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 600; padding: 4px 8px 4px 0; }
.keys td { padding: 6px 8px 6px 0; border-top: 1px solid var(--rule); vertical-align: top; }
.keys td:first-child { font-weight: 600; }
.keyList { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0 16px; margin: 0; }
.keyList div { display: flex; gap: 10px; align-items: baseline; padding: 5px 0; border-top: 1px solid var(--rule); }
.keyList dt { min-width: 60px; font-family: var(--mono); font-size: 13px; font-weight: 600; }
.keyList dd { margin: 0; font-size: 14px; }
.shareUrl { width: 100%; height: 40px; padding: 0 10px; border: 2px solid var(--ink); border-radius: 6px; background: var(--inset); font-size: 13px; font-family: var(--mono); }
.shareUrl + .fine { margin: 8px 0 12px; }

/* ---------- mid widths ---------- */

@media (max-width: 1279px) {
  :root { --panel-w: 320px; }
  .cardBody { grid-template-rows: minmax(0, 1fr) 230px; }
}

@media (max-width: 1099px) {
  .speedSeg { display: none; }
  .speedChip { display: inline-block; }
  .cardHead { padding-left: 16px; }
  .scenePick { font-size: 22px; }
}

/* ---------- phones and narrow windows: a fixed page with a settings sheet ---------- */

@media (max-width: 899px) {
  .deskOnly { display: none !important; }
  .phoneOnly { display: revert !important; }
  .strip { height: 44px; gap: 4px; padding: 0 8px 0 4px; }
  .back { display: grid; place-items: center; width: 44px; height: 44px; margin: 0; font-size: 20px; color: var(--on-page); text-decoration: none; }
  .backText { display: none; }
  .appName { font-size: 17px; min-width: 0; flex: 1 1 auto; }
  .stripSpacer { display: none; }
  .stripLabel { display: none; }
  .stripBtn { width: 40px; height: 40px; padding: 0; justify-content: center; border-width: 0; }
  .stripBtn.round { width: 36px; height: 36px; border-width: 2px; margin: 0 4px; }
  .card {
    margin: 0 8px;
    border-radius: 6px 6px 0 0;
    grid-template-rows: auto minmax(0, 1fr);
  }
  .cardHead { min-height: 52px; gap: 8px; padding: 6px 8px 6px 14px; border-bottom-width: 3px; }
  .scenePick { font-size: 20px; }
  .transport { gap: 6px; }
  .playBtn { min-width: 44px; width: 44px; height: 44px; padding: 0; }
  .playBtn span { display: none; }
  .iconBtn { width: 44px; height: 44px; }
  .speedChip { display: none; }
  body { grid-template-columns: minmax(0, 1fr); }
  .card { min-width: 0; }
  .cardBody { display: flex; flex-direction: column; min-width: 0; }
  .panel, .tabBody, .tabs { min-width: 0; }
  .energyHead { flex-wrap: wrap; gap: 6px 10px; padding: 6px 0; }
  .chartView { max-width: 100%; overflow-x: auto; }
  .errChip { margin-left: 0; }
  .card.panelClosed .panel { display: flex; }
  .stage { flex: 1; min-height: 160px; }
  .energy { display: none; }
  .tabBody .energy { display: flex; padding: 0; border: 0; height: 100%; min-height: 220px; }
  .panel { flex: none; border-left: 0; border-top: 2px solid var(--rule); height: 56px; transition: height var(--med) var(--ease); }
  .panel.open { height: 46dvh; }
  .peek {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    flex: none;
    width: 100%;
    height: 56px;
    padding: 8px 14px 0;
    border: 0;
    background: var(--card);
    color: var(--text);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
    text-align: left;
  }
  .grip { position: absolute; top: 6px; left: 50%; width: 36px; height: 4px; margin-left: -18px; border-radius: 2px; background: var(--rule); }
  .spark { width: 96px; height: 28px; flex: none; }
  .peekErr.bad { color: var(--red-text); font-weight: 700; }
  .peekOpen { margin-left: auto; font-size: 15px; font-weight: 600; color: var(--ink); white-space: nowrap; }
  .peekE, .peekErr { white-space: nowrap; }
  .modeChip { max-width: calc(100% - 140px); }
  .inspector { max-height: 45%; }
  .tabs { padding: 0 4px; }
  .tabs button { font-size: 13px; padding: 0 2px; }
  .tabBody { padding: 4px 16px 20px; }
  .rail { top: auto; bottom: 10px; left: 10px; flex-direction: row; }
  .tool { width: 44px; height: 44px; font-size: 0; gap: 0; }
  .railRule { width: 2px; height: auto; margin: 6px 3px; }
  .stageBtns { right: 10px; bottom: 10px; }
  .keyChip, .keyCard { display: none; }
  .hud { top: 10px; right: 10px; }
  .modeChip { top: 10px; left: 10px; transform: none; }
  .modeChip span:not(.modeX) { display: none; }
  .modeChip.long span:not(.modeX) { display: inline; }
  .buildBar { top: auto; bottom: 64px; left: 10px; right: 10px; margin: 0; max-width: none; flex-wrap: nowrap; overflow-x: auto; padding: 5px 6px; gap: 6px; }
  .seg .segLabel { display: none; }
  .seg button { padding: 0 9px; height: 34px; }
  .tip, .toast { bottom: 66px; }
  .bigPlay { padding: 14px 16px; }
  .pickerGrid { padding: 4px 14px 16px; }
  .pickerRow { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .sceneCard canvas { height: 80px; }
  .picker, .modal { padding: 0; place-items: stretch; }
  .pickerCard, .modalCard, .modalCard.narrow { width: 100%; max-height: 100dvh; border-radius: 0; }
}

@media (max-width: 899px) and (max-height: 700px) {
  .panel.open { height: 42dvh; }
}

@media (max-width: 360px) {
  .spark { display: none; }
  .segRow button { font-size: 12px; padding: 0 3px; }
}

/* landscape phones: everything side by side, no sheet */
@media (max-height: 520px) and (orientation: landscape) and (max-width: 899px) {
  .strip { height: 36px; }
  .strip .stripBtn, .strip .back { height: 36px; }
  .card { margin: 0 8px; border-radius: 6px 6px 0 0; }
  .cardHead { min-height: 44px; }
  .panel { position: absolute; right: 0; top: 0; bottom: 0; width: 300px; height: auto; z-index: 8; box-shadow: -18px 0 40px rgba(8, 12, 40, 0.25); border-top: 0; border-left: 2px solid var(--rule); transform: translateX(100%); transition: transform var(--med) var(--ease); }
  .panel.open, .panel.open[class] { transform: none; height: auto; }
  .panel:not(.open) { box-shadow: none; }
  .peek { position: absolute; right: 100%; top: 50%; width: auto; height: 44px; margin-top: -22px; padding: 0 12px; border: 2px solid var(--ink); border-right: 0; border-radius: 999px 0 0 999px; }
  .peek .spark, .peek .peekE, .peek .peekErr, .grip { display: none; }
  .cardBody { position: relative; }
  .rail { top: 10px; bottom: auto; flex-direction: column; }
  .tool { width: 40px; height: 40px; }
}

@media (pointer: coarse) {
  .seg button { height: 40px; }
  .chipBtn { height: 44px; }
  .segRow button { height: 44px; }
  .speedSeg { height: 44px; }
  .reset { width: 40px; height: 40px; }
  .rowTop .val { min-height: 36px; }
  .chartView button { height: 36px; }
  .iconBtn, .stripBtn.round { width: 44px; height: 44px; }
  .playBtn { height: 44px; }
  .tabs button { height: 48px; }
  input[type="range"] { height: 40px; }
  input[type="range"]::-webkit-slider-thumb { width: 24px; height: 24px; margin-top: -10px; }
  .legend button { height: 32px; }
  .btn.small { height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (forced-colors: active) {
  .tool[aria-pressed="true"], .seg button[aria-checked="true"], .radioCard[aria-checked="true"], .segRow button[aria-checked="true"] { outline: 2px solid Highlight; }
  :focus-visible { outline-color: Highlight; }
}