/*
 * ════════════════════════════════════════════════════════════════
 *  FEM Blocks · fem-blocks.css
 *  FEAScript website tokens (light and dark) + a playful pixel kit
 * ════════════════════════════════════════════════════════════════
 */

:root {
  --font-pixel: "Jersey 10", "Roboto Mono", monospace;
  --font-math: "STIX Two Math", "Cambria Math", "Latin Modern Math", "Times New Roman", serif;
  --outline: #1d1d1d;
  --card: #fffdf6;
  --shadow: 4px 4px 0 var(--outline);
  --top-h: 3.6rem;
}

html[data-theme="dark"] {
  --outline: #0b0b0e;
  --card: #222226;
}

html.site body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.px {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* ─── Top bar ─── */
.fb-top {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  height: var(--top-h);
  padding: 0 1rem;
  border-bottom: 3px solid var(--outline);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
}

.fb-brand {
  display: flex;
  align-items: center;
  gap: 0.05em;
  font-size: 1.35rem;
  font-weight: 300;
  color: var(--ink-strong);
  white-space: nowrap;
}

.fb-brand > svg {
  width: 0.75em;
  height: 0.75em;
  margin-right: 0.08em;
}

.fb-brand .wm-t {
  display: inline;
  width: 0.3em;
  height: 1.15em;
  margin: 0 0 -0.32em 0.02em;
  vertical-align: -0.16em;
}

.fb-crumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--faint);
}

.fb-crumb a {
  color: var(--muted);
  text-decoration: underline dotted;
}

.fb-crumb a:hover {
  color: var(--gold-ink);
}

.fb-title {
  font-family: var(--font-pixel);
  font-size: 1.89rem;
    letter-spacing: 0.02em;
  color: var(--ink-strong);
  text-shadow: 2px 2px 0 var(--gold);
}

.fb-title b {
  margin-left: 0.15em;
  padding: 0 0.25em;
  color: #1d1d1d;
  background: var(--gold);
  border: 2px solid var(--outline);
  text-shadow: none;
}

.fb-top-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ─── Pixel buttons ─── */
.fb-btn {
  font-family: var(--font-pixel);
  font-size: 1.23rem;
  padding: 0.35rem 0.75rem;
  color: #1d1d1d !important;
  background: var(--gold) !important;
  border: 2px solid var(--outline) !important;
  box-shadow:
    inset -2px -2px 0 rgba(0, 0, 0, 0.22),
    inset 2px 2px 0 rgba(255, 255, 255, 0.4),
    3px 3px 0 var(--outline);
  cursor: pointer;
  white-space: nowrap;
}

.fb-btn.ghost {
  background: var(--card) !important;
  color: var(--ink) !important;
}

.fb-btn.small {
  font-size: 1.1rem;
  padding: 0.2rem 0.55rem;
}

.fb-btn:hover {
  filter: brightness(1.06);
}

.fb-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--outline);
}

/* ─── Mission bar ─── */
.fb-mission {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 3px solid var(--outline);
  background: var(--bg-sunken);
}

#mascot {
  width: 96px;
  height: 96px;
}

#mascot svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Tri hops and blinks, like on the Tri's Lab page */
.lab-tri .tri-up {
  animation: triHop 1.6s steps(1) infinite;
}

.lab-tri .tri-eyes {
  transform-box: fill-box;
  transform-origin: center;
  animation: triBlink 4.2s steps(1) infinite;
}

@keyframes triHop {
  0%,
  100% {
    transform: none;
  }
  50% {
    transform: translateY(-1px);
  }
}

@keyframes triBlink {
  0%,
  92%,
  100% {
    transform: none;
  }
  94% {
    transform: scaleY(0.15);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-tri .tri-up,
  .lab-tri .tri-eyes {
    animation: none;
  }
}

html[data-theme="dark"] .lab-tri .tri-feet {
  fill: #e6e3da;
}

.fb-bubble {
  position: relative;
  padding: 0.6rem 0.9rem;
  background: var(--card);
  border: 3px solid var(--outline);
  box-shadow: var(--shadow);
  min-height: 80px;
}

.fb-bubble::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 26px;
  width: 12px;
  height: 12px;
  background: var(--outline);
  clip-path: polygon(100% 0, 0 50%, 100% 100%);
}

.fb-bubble-head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.fb-kicker {
  font-family: var(--font-pixel);
  font-size: 1.01rem;
    letter-spacing: 0.06em;
  color: var(--gold-ink);
  text-transform: uppercase;
}

.fb-bubble h1 {
  font-family: var(--font-pixel);
  font-size: 1.76rem;
    color: var(--ink-strong);
}

.fb-bubble p {
  margin-top: 0.25rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink);
}

.fb-goal > span {
  display: inline-block;
  margin-right: 0.5rem;
  font-family: var(--font-pixel);
  font-size: 0.98rem;
    padding: 0.05rem 0.4rem;
  color: #fff;
  background: var(--phys-heat);
  border: 2px solid var(--outline);
}

.fb-goal.done > span {
  background: var(--phys-structure);
}

.fb-mission-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.fb-missions {
  display: flex;
  gap: 0.3rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
}

.fb-mchip {
  flex: 0 1 2rem;
  min-width: 1.5rem;
  height: 2rem;
  font-family: var(--font-pixel);
  font-size: 1.23rem !important;
    color: var(--ink) !important;
  background: var(--card) !important;
  border: 2px solid var(--outline) !important;
  box-shadow: 2px 2px 0 var(--outline);
}

.fb-mchip.done {
  background: var(--phys-structure) !important;
  color: #fff !important;
}

.fb-mchip.on {
  outline: 3px solid var(--gold);
  outline-offset: 1px;
}

.fb-mchip:hover {
  filter: brightness(1.08);
}

.fb-mission-actions {
  display: flex;
  gap: 0.4rem;
}

/* ─── Workbench ─── */
.fb-bench {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 40%);
  gap: 1rem;
  padding: 1rem;
  min-height: 0;
}

.fb-ws-wrap {
  position: relative;
  min-height: 560px;
  height: calc(100vh - var(--top-h) - 9.5rem);
  border: 3px solid var(--outline);
  box-shadow: var(--shadow);
  background: var(--bg);
}

#workspace {
  position: absolute;
  inset: 0;
}

.fb-run {
  position: absolute;
  right: 1.2rem;
  top: 0.9rem;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem 0.55rem 0.9rem;
  font-family: var(--font-pixel);
  font-size: 1.69rem !important;
    color: #fff !important;
  background: var(--phys-structure) !important;
  border: 3px solid var(--outline) !important;
  box-shadow:
    inset -3px -3px 0 rgba(0, 0, 0, 0.25),
    inset 3px 3px 0 rgba(255, 255, 255, 0.35),
    4px 4px 0 var(--outline);
  cursor: pointer;
}

.fb-run:hover:not(:disabled) {
  filter: brightness(1.08);
}

.fb-run:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--outline);
}

.fb-run:disabled {
  filter: grayscale(0.9);
  cursor: wait;
  font-size: 0.95rem !important;
}

.fb-run-icon {
  display: inline-grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  font-size: 0.8em;
  background: rgba(0, 0, 0, 0.2);
}

.fb-run.busy .fb-run-icon {
  animation: spin 0.6s steps(4) infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ─── Side: results and math ─── */
.fb-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.fb-card {
  background: var(--card);
  border: 3px solid var(--outline);
  box-shadow: var(--shadow);
}

.fb-tabs {
  display: flex;
  border-bottom: 3px solid var(--outline);
}

.fb-tab {
  flex: 1;
  padding: 0.45rem 0.4rem !important;
  font-family: var(--font-pixel);
  font-size: 1.23rem !important;
    color: var(--muted) !important;
  background: var(--bg-sunken) !important;
  border-right: 3px solid var(--outline) !important;
}

.fb-tab:last-child {
  border-right: 0 !important;
}

.fb-tab.on {
  color: var(--ink-strong) !important;
  background: var(--card) !important;
  box-shadow: inset 0 -4px 0 var(--gold);
}

.fb-pane {
  display: none;
  padding: 0.8rem;
}

.fb-pane.on {
  display: block;
}

.fb-pane-note {
  font-size: 0.88rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.fb-canvas-wrap {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 220px;
  overflow: hidden;
}

.fb-canvas-wrap.win {
  animation: win 1.2s steps(6);
}

@keyframes win {
  0%,
  33%,
  66% {
    box-shadow: inset 0 0 0 6px var(--gold);
  }
  16%,
  50%,
  100% {
    box-shadow: none;
  }
}

#result {
  max-width: 100%;
  touch-action: pan-y;
  height: auto !important;
}

.fb-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--muted);
}

.fb-empty b {
  font-family: var(--font-pixel);
  font-size: 1.56rem;
  color: var(--ink-strong);
}

.fb-empty[hidden],
#result[hidden] {
  display: none;
}

.kbd-run {
  white-space: nowrap;
  font-family: var(--font-pixel);
    padding: 0 0.3rem;
  color: #fff;
  background: var(--phys-structure);
  border: 2px solid var(--outline);
}

.fb-tip {
  position: absolute;
  pointer-events: none;
  padding: 0.25rem 0.5rem;
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  line-height: 1.3;
  color: #fff;
  background: #1d1d1d;
  border: 2px solid var(--gold);
  opacity: 0;
  white-space: nowrap;
}

.fb-tip.on {
  opacity: 1;
}

.fb-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  color: var(--muted);
}

.fb-legend > span {
  white-space: nowrap;
}

.fb-legend-bar {
  display: flex;
  border: 2px solid var(--outline);
}

.fb-legend-bar i {
  width: 14px;
  height: 12px;
}

.fb-summary {
  margin-top: 0.4rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.fb-summary b {
  color: var(--ink-strong);
  font-weight: 500;
}

.fb-code {
  margin-top: 0.6rem;
  padding: 0.8rem;
  max-height: 460px;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.55;
  color: #e6e3da;
  background: #1b1b1f;
  border: 2px solid var(--outline);
  white-space: pre;
}

.fb-code .tok-kw {
  color: #ff79a8;
}

.fb-code .tok-str {
  color: #f6d54a;
}

.fb-code .tok-num {
  color: #7fd0ff;
}

.fb-code .tok-fn {
  color: #7be0b5;
}

.fb-code .tok-comment {
  color: #8c8a82;
  font-style: italic;
}

.fb-steps {
  counter-reset: step;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.fb-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.4rem;
  font-size: 0.92rem;
  line-height: 1.5;
}

.fb-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  font-family: var(--font-pixel);
    color: #1d1d1d;
  background: var(--gold);
  border: 2px solid var(--outline);
}

.fb-mini {
  display: block;
  margin-top: 0.5rem;
  max-width: 100%;
  width: 240px;
  border: 2px solid var(--outline);
}

#miniK {
  width: 200px;
  height: 200px;
}

/* The math tab: what the blocks mean, then how it's solved */
.fb-math {
  padding: 0 0 0.6rem;
}

.fb-math-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fb-phys {
  font-family: var(--font-pixel);
  font-size: 1.04rem;
    padding: 0.05rem 0.45rem;
  color: #fff;
  background: var(--phys-heat);
  border: 2px solid var(--outline);
}

.fb-phys[data-physics="flow"] {
  background: var(--phys-flow);
}

.fb-phys[data-physics="front"] {
  background: #2c6f8f;
}

.fb-eq [data-term="phi"] {
  color: #2c6f8f;
}

#mascot {
  cursor: pointer;
}

.fb-eq {
  margin: 0.6rem 0;
  padding: 0.6rem;
  text-align: center;
  font-family: var(--font-math);
  font-style: italic;
  font-size: 1.7rem;
  color: var(--ink-strong);
  background: var(--bg-sunken);
  border: 2px solid var(--outline);
}

.fb-eq .op {
  font-style: normal;
  color: var(--muted);
}

.fb-eq [data-term] {
  padding: 0 0.1em;
  transition: background 0.15s;
}

.fb-eq [data-term="k"] {
  color: #a85a26;
}

.fb-eq [data-term="Q"] {
  color: var(--phys-heat);
}

.fb-eq [data-term="T"],
.fb-eq [data-term="u"] {
  color: var(--phys-flow);
}

.fb-eq [data-term="p"] {
  color: var(--phys-structure);
}

.fb-eq .hl {
  background: var(--gold);
  color: #1d1d1d !important;
  box-shadow: 0 0 0 3px var(--outline);
}

.fb-terms {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.fb-term {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  padding: 0.3rem 0.5rem;
  font-size: 0.76rem;
  line-height: 1.35;
  color: var(--faint);
  border: 2px dashed var(--line-strong);
}

.fb-term .sym {
  font-family: var(--font-math);
  font-style: italic;
  font-size: 1rem;
  color: var(--muted);
}

.fb-term b {
  font-weight: 500;
  color: var(--muted);
}

.fb-term.used {
  border-style: solid;
  border-color: var(--outline);
  color: var(--muted);
}

.fb-term.used .sym,
.fb-term.used b {
  color: var(--ink-strong);
}

.fb-term.hl {
  background: var(--gold);
  border-color: var(--outline);
  color: #1d1d1d;
}

.fb-term.hl .sym,
.fb-term.hl b {
  color: #1d1d1d;
}

.fb-explain {
  margin-top: 0.7rem;
  padding: 0.6rem 0.8rem;
  border-left: 8px solid var(--bc, var(--gold));
  background: var(--bg-sunken);
}

.fb-explain h3 {
  font-family: var(--font-pixel);
  font-size: 1.43rem;
    color: var(--ink-strong);
}

.fb-explain p {
  margin-top: 0.3rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.fb-explain .fun {
  font-size: 0.82rem;
  color: var(--muted);
}

.fb-explain .fun::before {
  content: "★ ";
  color: var(--gold-ink);
}

/* ─── Footer and toast ─── */
.fb-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 0.8rem 1rem;
  font-size: 0.8rem;
  color: var(--faint);
  border-top: 3px solid var(--outline);
}

.fb-foot a {
  color: var(--muted);
  text-decoration: underline dotted;
}

.fb-toast {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  z-index: 60;
  max-width: min(560px, 92vw);
  padding: 0.6rem 0.9rem;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--ink);
  background: var(--card);
  border: 3px solid var(--outline);
  border-left: 10px solid var(--phys-structure);
  box-shadow: var(--shadow);
  transform: translate(-50%, calc(100% + 3rem));
  visibility: hidden;
  transition:
    transform 0.25s steps(4),
    visibility 0s 0.25s;
}

.fb-toast.on {
  transform: translate(-50%, 0);
  visibility: visible;
  transition: transform 0.25s steps(4);
}

.fb-toast.bad {
  border-left-color: var(--phys-heat);
}

/* ─── Blockly, made pixel-y ─── */
.blocklySvg {
  display: block;
}

.blocklyPath {
  stroke: var(--outline) !important;
  stroke-width: 2.5px !important;
  shape-rendering: crispEdges;
}

.blocklyDraggable > .blocklyPath,
.blocklyBlockCanvas > .blocklyDraggable > .blocklyPath {
  filter: drop-shadow(3px 3px 0 rgba(0, 0, 0, 0.3));
}

.blocklySelected > .blocklyPath {
  stroke: var(--gold) !important;
  stroke-width: 4px !important;
}

.blocklyText,
.blocklyFlyoutLabelText {
  fill: #fff !important;
}

.blocklyEditableText > rect,
.blocklyFieldRect {
  stroke: var(--outline) !important;
  stroke-width: 2px !important;
  shape-rendering: crispEdges;
}

.blocklyEditableText > .blocklyText,
.blocklyFieldRect + .blocklyText {
  fill: #1d1d1d !important;
}

.blocklyToolbox,
.blocklyToolboxDiv {
  border-right: 3px solid var(--outline);
  padding: 0.3rem 0 !important;
  font-family: var(--font-pixel) !important;
}

.blocklyToolboxCategory,
.blocklyTreeRow {
  height: auto !important;
  margin: 0.15rem 0.4rem 0.15rem 0 !important;
  padding: 0.35rem 0.6rem 0.35rem 0.4rem !important;
  border-radius: 0 !important;
}

.blocklyToolboxCategoryLabel,
.blocklyTreeLabel {
  font-family: var(--font-pixel) !important;
  font-size: 1.3rem !important;
  }

.blocklyToolboxSelected,
.blocklyTreeSelected {
  box-shadow: 3px 3px 0 var(--outline);
}

.blocklyToolboxSelected .blocklyToolboxCategoryLabel,
.blocklyTreeSelected .blocklyTreeLabel {
  color: #fff !important;
}

.blocklyWidgetDiv .blocklyMenu,
.blocklyDropDownDiv {
  font-family: var(--font-pixel) !important;
  border-radius: 0 !important;
}

.blocklyDropDownDiv {
  border: 3px solid var(--outline) !important;
  box-shadow: var(--shadow) !important;
}

.blocklyHtmlInput {
  font-family: var(--font-pixel) !important;
  border-radius: 0 !important;
}

/* ─── Narrow screens ─── */
@media (max-width: 1000px) {
  .fb-bench {
    grid-template-columns: 1fr;
  }

  .fb-ws-wrap {
    height: 70vh;
  }

  .fb-mission {
    grid-template-columns: auto 1fr;
  }

  .fb-mission-side {
    grid-column: 1 / -1;
    align-items: stretch;
  }

  .fb-missions {
    justify-content: flex-start;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .fb-crumb,
  #btnOpen,
  #btnSave {
    display: none;
  }

  /* Keep the top bar inside the screen: logo only, smaller title */
  .fb-top {
    gap: 0.5rem;
    padding: 0 0.75rem;
  }

  .fb-brand > span {
    display: none;
  }

  .fb-brand > svg {
    width: 1.2em;
    height: 1.2em;
  }

  .fb-title {
    font-size: 1.5rem;
  }

  .fb-top-right .fb-btn {
    padding: 0.25rem 0.5rem;
  }

  .fb-mission {
    align-items: start;
    gap: 0.75rem;
    padding: 0.75rem;
  }

  #mascot {
    width: 48px;
    height: 48px;
  }

  .fb-bubble::before {
    top: 18px;
  }

  .fb-bench {
    padding: 0.75rem;
  }

  /* Leave the blocks more room next to the toolbox */
  .blocklyToolboxCategory,
  .blocklyTreeRow {
    padding: 0.25rem 0.4rem 0.25rem 0.3rem !important;
  }

  .blocklyToolboxCategoryLabel,
  .blocklyTreeLabel {
    font-size: 1.05rem !important;
  }

  .fb-legend {
    font-size: 1rem;
  }

  .fb-legend-bar i {
    width: 8px;
  }

  .fb-run {
    right: 0.7rem;
    top: 0.6rem;
    padding: 0.35rem 0.8rem 0.35rem 0.6rem;
    font-size: 1.3rem !important;
  }

  .fb-terms {
    grid-template-columns: 1fr;
  }
}

/* Jersey 10 has a single weight: never synthesise bold */
.fb-title,
.fb-title b,
.fb-kicker,
.fb-bubble h1,
.fb-btn,
.fb-run,
.fb-tab,
.fb-mchip,
.fb-goal > span,
.fb-phys,
.fb-empty b,
.fb-explain h3,
.fb-tip,
.fb-tip b,
.kbd-run,
.fb-steps li::before,
.fb-legend {
  font-weight: 400 !important;
}

/* Code lines: the selected block's lines light up */
.fb-code {
  white-space: normal;
}

.fb-code .ln {
  display: block;
  white-space: pre;
  margin: 0 -0.8rem;
  padding: 0 0.8rem;
  border-left: 4px solid transparent;
}

.fb-code .ln.hl {
  background: rgba(212, 170, 0, 0.22);
  border-left-color: #d4aa00;
}

.fb-explain .code-note {
  font-size: 0.82rem;
  color: var(--muted);
}

.fb-explain .code-note a {
  color: var(--link);
  text-decoration: underline;
}

.fb-solved-head {
  margin: 0.9rem 0 0.7rem;
  padding-top: 0.8rem;
  border-top: 3px dashed var(--line-strong);
}

/* A block was clicked: its explanation is waiting in The math tab */
.fb-tab.ping {
  animation: tabPing 1.2s steps(2) 3;
}

@keyframes tabPing {
  50% {
    background: var(--gold) !important;
    color: #1d1d1d !important;
  }
}