/* Balance Quest — game-specific styles (shared look comes from ../../assets/site.css).
   Every class here starts with "bq-" so it can't clash with the site's own classes. */

.bq-page .wrap {
  max-width: 1240px;
}

.bq-page {
  touch-action: manipulation;
}

.bq-main {
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

.bq-page .site-header {
  padding-top: 12px;
  padding-bottom: 6px;
}

/* ---------- Title screen ---------- */

.bq-title {
  padding: 4px 0 8px;
}

.bq-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 8px 0 12px;
}

.bq-hero-icon {
  flex: none;
  width: 64px;
  height: 64px;
}

.bq-hero-post,
.bq-hero-base {
  fill: #6b7280;
}

.bq-hero-beam {
  fill: #cbd5e1;
}

.bq-hero-pan {
  fill: var(--amber);
}

.bq-hero-string {
  fill: none;
  stroke: #94a3b8;
  stroke-width: 1.5;
}

.bq-hero-pivot {
  fill: var(--teal);
}

.bq-logo {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 1.5rem + 2.4vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--text);
}

.bq-tagline {
  margin: 4px 0 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--teal);
}

.bq-intro {
  max-width: 46rem;
}

.bq-section-title {
  margin: 20px 0 12px;
  font-size: 1.375rem;
}

.bq-worlds {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
  gap: 14px;
}

.bq-world-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 14px 32px rgba(0, 0, 0, 0.3);
}

.bq-world-art {
  position: relative;
  height: 88px;
  background: #1f2937;
}

.bq-world-card[data-theme="meadow"] .bq-world-art {
  background:
    radial-gradient(14px 14px at 78% 30%, #fff7cc 60%, transparent 62%),
    linear-gradient(180deg, #7cc8f2 0%, #bfe6ff 58%, #74c463 59%, #4f9e45 100%);
}

.bq-world-card[data-theme="caves"] .bq-world-art {
  background:
    radial-gradient(10px 22px at 70% 72%, #c4b5fd 60%, transparent 64%),
    radial-gradient(8px 16px at 84% 78%, #67e8f9 60%, transparent 64%),
    radial-gradient(9px 18px at 58% 80%, #f0abfc 60%, transparent 64%),
    linear-gradient(170deg, #34275c, #120d22);
}

.bq-world-card[data-theme="volcano"] .bq-world-art {
  background:
    radial-gradient(60px 26px at 75% 100%, rgba(255, 122, 46, 0.85), transparent 70%),
    linear-gradient(135deg, transparent 58%, #2a1a14 58.5%),
    linear-gradient(225deg, transparent 58%, #2a1a14 58.5%),
    linear-gradient(180deg, #7a2f19, #2c1610);
}

.bq-world-card[data-theme="ocean"] .bq-world-art {
  background:
    repeating-linear-gradient(90deg, transparent 0 46px, rgba(234, 228, 212, 0.75) 46px 56px, transparent 56px 120px),
    linear-gradient(180deg, #1b7f96 0%, #0f5466 70%, #d8c591 71%, #c8b47f 100%);
}

.bq-world-num {
  position: absolute;
  left: 14px;
  bottom: 6px;
  font-family: var(--serif);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.55);
}

.bq-world-card[data-locked="true"] .bq-world-art {
  filter: grayscale(0.75) brightness(0.55);
}

.bq-world-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
}

.bq-world-name {
  margin: 0;
  font-size: 1.3rem;
}

.bq-world-kicker {
  display: block;
  margin-bottom: 2px;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.bq-world-blurb,
.bq-world-lock {
  margin: 0;
  color: var(--muted);
}

.bq-world-progress {
  margin: 0;
  font-size: 0.9375rem;
}

.bq-world-done {
  font-weight: 700;
  color: var(--good);
}

.bq-world-lock {
  font-size: 0.875rem;
}

.bq-world-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

.bq-world-card .btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.bq-extras {
  display: grid;
  gap: 14px;
  max-width: 52rem;
  margin-top: 22px;
}

.bq-details summary {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
}

.bq-details summary:focus-visible {
  outline-offset: -3px;
  border-radius: var(--radius);
}

.bq-details-body {
  padding: 0 16px 16px;
}

.bq-details code {
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--glass-strong);
  font-size: 0.9em;
  white-space: nowrap;
}

.bq-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 700;
}

.bq-textarea {
  display: block;
  width: 100%;
  min-height: 8.5rem;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  color: var(--text);
  font: 1rem/1.5 ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;
  resize: vertical;
}

.bq-check {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  cursor: pointer;
}

.bq-check input {
  flex: none;
  width: 22px;
  height: 22px;
  margin: 0;
  accent-color: var(--teal);
}

.bq-options {
  margin: 0;
  padding: 8px 16px 10px;
}

.bq-options legend {
  padding: 0 6px;
  font-weight: 700;
}

.bq-note {
  margin: 4px 0 0;
  color: var(--amber);
}

.bq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.bq-practice-report p {
  margin: 12px 0 4px;
  font-weight: 700;
}

.bq-ok {
  color: var(--good);
}

.bq-bad {
  color: var(--bad);
}

.bq-problems {
  margin: 4px 0 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.bq-problems strong {
  color: var(--text);
}

.bq-howto-list {
  margin: 0;
  padding-left: 1.2em;
}

.bq-howto-list li {
  margin-bottom: 6px;
}

.bq-data-error {
  color: var(--bad);
}

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

.bq-stage {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0d1014;
}

.bq-game.is-2d .bq-stage {
  overflow: visible;
  min-height: 420px;
  padding: 12px;
}

.bq-view {
  position: absolute;
  inset: 0;
  outline: none;
}

.bq-view:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: -3px;
}

.bq-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* HUD: floats over the 3D view, sits on top of the list in simple mode */
.bq-hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.bq-game.is-3d .bq-hud {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  z-index: 4;
  pointer-events: none;
}

.bq-game.is-3d .bq-hud > * {
  pointer-events: auto;
}

.bq-game.is-2d .bq-hud {
  margin-bottom: 12px;
}

.bq-hud p {
  margin: 0;
}

.bq-menu {
  background: rgba(8, 9, 11, 0.78);
}

.bq-hud-world,
.bq-hud-chip,
.bq-slow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(8, 9, 11, 0.78);
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

.bq-hud-world {
  font-weight: 700;
}

.bq-hud-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.bq-hud-chip b [aria-hidden="true"] {
  color: var(--amber);
}

.bq-slow {
  border-color: var(--amber);
}

.bq-help {
  position: absolute;
  left: 50%;
  bottom: 12px;
  z-index: 2;
  max-width: calc(100% - 24px);
  margin: 0;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(8, 9, 11, 0.78);
  font-size: 0.875rem;
  text-align: center;
  transform: translateX(-50%);
  transition: opacity 0.5s ease;
}

.bq-help.is-faded {
  opacity: 0;
  pointer-events: none;
}

.bq-help kbd {
  margin: 0 1px;
}

.bq-prompt {
  position: absolute;
  left: 50%;
  bottom: 58px;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-height: 44px;
  max-width: calc(100% - 24px);
  padding: 10px 22px;
  border: 2px solid var(--amber);
  border-radius: 16px;
  background: rgba(8, 9, 11, 0.88);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transform: translateX(-50%);
  animation: bq-pulse 1.8s ease-in-out infinite;
}

.bq-prompt-gate {
  font-size: 0.875rem;
  color: var(--muted);
}

.bq-prompt-action {
  font-size: 1.125rem;
  font-weight: 700;
}

@keyframes bq-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.35); }
  50% { box-shadow: 0 0 0 10px rgba(251, 191, 36, 0); }
}

/* Touch controls */
.bq-touch {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0 max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px));
  pointer-events: none;
}

.bq-joystick {
  position: relative;
  width: 128px;
  height: 128px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  background: rgba(8, 9, 11, 0.45);
  pointer-events: auto;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.bq-knob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 56px;
  height: 56px;
  margin: -28px 0 0 -28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}

.bq-touch-solve {
  width: 88px;
  height: 88px;
  border: 0;
  border-radius: 50%;
  background: var(--amber);
  color: var(--on-accent);
  font: 800 1.0625rem/1 var(--sans);
  pointer-events: auto;
  touch-action: manipulation;
  cursor: pointer;
}

.bq-touch-solve:disabled {
  opacity: 0.4;
  cursor: default;
}

/* On touch screens the prompt sits under the top bar, away from the thumbs. */
.bq-touch-device .bq-game.is-3d .bq-prompt {
  top: 64px;
  bottom: auto;
}

.bq-touch-device .bq-help {
  bottom: 150px;
}

/* While a puzzle is open the walking controls step aside. */
.bq-game.is-puzzle .bq-touch,
.bq-game.is-puzzle .bq-help {
  display: none;
}

/* ---------- Simple mode list ---------- */

.bq-board-title {
  margin: 0 0 4px;
  font-size: 1.4rem;
}

.bq-board-note {
  margin: 0 0 12px;
  color: var(--muted);
}

.bq-gate-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bq-gate2d {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--glass);
}

.bq-gate2d.is-next {
  border-color: var(--teal);
  background: var(--teal-soft);
}

.bq-gate2d.is-locked {
  opacity: 0.62;
}

.bq-gate2d.is-boss {
  border-width: 2px;
  border-color: #f472b6;
}

.bq-gate2d-badge {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--glass-strong);
  font-weight: 800;
  font-size: 1.15rem;
}

.bq-gate2d.is-solved .bq-gate2d-badge {
  color: var(--amber);
  font-size: 0.8rem;
  letter-spacing: 1px;
}

.bq-gate2d-title {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
}

.bq-gate2d-eq {
  display: block;
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--text);
}

.bq-gate2d-meta {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

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

.bq-puzzle {
  z-index: 6;
}

.bq-game.is-3d .bq-puzzle {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: center;
  max-height: 62%;
  padding: 0 10px 10px;
  pointer-events: none;
}

.bq-game.is-2d .bq-puzzle {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  background: rgba(0, 0, 0, 0.62);
}

.bq-puzzle[hidden] {
  display: none !important;
}

.bq-pz-card {
  width: 100%;
  max-width: 980px;
  max-height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px 16px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(14, 17, 22, 0.95);
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.45);
  pointer-events: auto;
}

.bq-game.is-2d .bq-pz-card {
  max-width: 760px;
  max-height: calc(100vh - 24px);
  max-height: calc(100svh - 24px);
  background: var(--bg-raised);
}

.bq-puzzle.is-boss .bq-pz-card {
  border-color: #f472b6;
}

.bq-pz-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.bq-pz-kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
}

.bq-puzzle.is-boss .bq-pz-kicker {
  color: #f9a8d4;
}

.bq-pz-title {
  margin: 2px 0 0;
  font-size: clamp(1.15rem, 1rem + 0.8vw, 1.5rem);
}

.bq-pz-title:focus {
  outline: none;
}

.bq-pz-title:focus-visible {
  outline: 3px solid var(--focus);
}

.bq-close {
  flex: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--glass);
  color: var(--text);
  font: 700 1.05rem/1 var(--sans);
  cursor: pointer;
}

.bq-close:hover {
  background: var(--glass-strong);
}

.bq-pz-help {
  margin: 2px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Short screens: keep the help for screen readers only, to save room. */
@media (max-height: 820px) {
  .bq-game.is-3d .bq-pz-help {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }
}

.bq-pz-scale {
  max-width: 340px;
  margin: 0 auto;
}

.bq-svg-scale {
  display: block;
  width: 100%;
  height: auto;
}

.bq-svg-base,
.bq-svg-post {
  fill: #4b5563;
}

.bq-svg-bar {
  fill: #a8b1bb;
}

.bq-svg-pivot {
  fill: var(--teal);
}

.bq-svg-needle {
  stroke: var(--amber);
  stroke-width: 3;
  stroke-linecap: round;
}

.bq-svg-string {
  stroke: #9ca3af;
  stroke-width: 1.5;
}

.bq-svg-dish {
  fill: #d9b45a;
}

.bq-svg-dot {
  stroke: rgba(0, 0, 0, 0.45);
  stroke-width: 1;
}

.bq-svg-label {
  fill: var(--text);
  font: 700 11px var(--sans);
}

.bq-svg-beam {
  transform-box: view-box;
  transform-origin: 160px 34px;
  transition: transform 0.5s cubic-bezier(0.3, 1.35, 0.5, 1);
}

.bq-svg-pan {
  transform-box: view-box;
  transition: transform 0.5s cubic-bezier(0.3, 1.35, 0.5, 1);
}

/* Equation with coefficient boxes */
.bq-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 10px;
  padding: 6px 2px 8px;
  font-size: clamp(1.25rem, 1rem + 1.1vw, 1.85rem);
}

.bq-eq.is-long {
  gap: 6px 8px;
  font-size: clamp(1.1rem, 0.9rem + 0.5vw, 1.3rem);
}

.bq-term {
  display: flex;
  align-items: center;
  gap: 6px;
}

.bq-formula {
  font-family: var(--serif);
  font-weight: 700;
  white-space: nowrap;
}

.bq-formula sub {
  font-size: 0.62em;
  line-height: 0;
  vertical-align: -0.32em;
}

.bq-plus,
.bq-arrow {
  font-weight: 700;
  color: var(--muted);
}

.bq-plus {
  padding-right: 2px;
}

.bq-arrow {
  padding: 0 6px 0 2px;
  font-size: 1.2em;
  color: var(--teal);
}

/* "yields" arrow between reactants and products (built by js/arrow.js):
   a bold amber arrow with the word "yields" under it, set apart from the + signs. */
.bq-yields {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin: 0 10px;
  line-height: 1;
}

.bq-yields-arrow {
  display: block;
  width: 2.4em;
  height: 0.9em;
  fill: var(--amber);
}

.bq-yields-word {
  font-family: var(--sans);
  font-size: 0.42em;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
}

.bq-eq-yields {
  margin: 0 14px;
}

.bq-eq.is-long .bq-eq-yields {
  margin: 0 8px;
}

/* Smaller version inside the Simple-mode gate list */
.bq-yields--inline {
  vertical-align: middle;
  margin: 0 6px;
}

.bq-yields--inline .bq-yields-arrow {
  width: 1.8em;
  height: 0.7em;
}

.bq-yields--inline .bq-yields-word {
  font-size: 0.55em;
}

@media (max-width: 480px) {
  .bq-eq-yields {
    margin: 0 6px;
  }
}

.bq-coef {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.bq-step {
  width: 48px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--glass-strong);
  color: var(--text);
  font: 700 1.5rem/1 var(--sans);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.bq-step:hover {
  background: rgba(255, 255, 255, 0.16);
}

.bq-step:active {
  background: var(--teal-soft);
}

.bq-step:disabled {
  opacity: 0.3;
  cursor: default;
}

.bq-coef-input {
  width: 54px;
  height: 52px;
  padding: 0;
  border: 2px solid var(--teal);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: 700 1.6rem/1 var(--sans);
  text-align: center;
  caret-color: var(--teal);
}

.bq-coef-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
  opacity: 1;
}

.bq-coef-input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.bq-coef-input[readonly] {
  border-color: var(--line-strong);
}

.bq-coef.is-revealed .bq-coef-input {
  border-color: var(--violet);
  color: var(--violet);
}

.bq-puzzle.is-solved .bq-coef-input {
  border-color: var(--good);
  color: var(--good);
}

.bq-coef-fixed {
  min-width: 0.8em;
  font: 700 1em/1 var(--sans);
  text-align: right;
}

.bq-coef-fixed.is-one {
  color: rgba(255, 255, 255, 0.34);
}

/* Panel layout: one column on phones; on wide screens the counter and buttons
   sit to the right of the equation so the 3D scale stays visible above. */
.bq-pz-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

@media (min-width: 860px) {
  .bq-pz-grid {
    grid-template-columns: minmax(0, 1fr) 15.5rem;
    grid-template-areas:
      "help help"
      "scale counter"
      "eq counter"
      "msgs actions";
    column-gap: 18px;
    align-items: start;
  }

  .bq-pz-help { grid-area: help; }
  .bq-pz-scale { grid-area: scale; }
  .bq-eq { grid-area: eq; }
  .bq-counter-wrap { grid-area: counter; }
  .bq-pz-msgs { grid-area: msgs; }
  .bq-pz-actions { grid-area: actions; align-self: end; }
}

.bq-counter {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.bq-counter caption {
  padding-bottom: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: left;
  text-transform: uppercase;
  color: var(--muted);
}

.bq-counter th,
.bq-counter td {
  padding: 3px 8px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.bq-counter thead th {
  font-size: 0.8125rem;
  color: var(--muted);
}

.bq-counter tbody th {
  font-family: var(--serif);
  font-size: 1.05rem;
}

.bq-counter tr.is-equal {
  background: var(--good-soft);
}

.bq-counter tr.is-equal .bq-counter-mark {
  color: var(--good);
  font-weight: 800;
}

.bq-counter tr.is-off .bq-counter-mark {
  color: var(--bad);
  font-weight: 800;
}

.bq-counter tr.is-empty .bq-counter-mark {
  color: var(--muted);
}

.bq-counter-wrap.is-waiting .bq-counter {
  display: none;
}

.bq-counter-wrap.is-stale .bq-counter {
  opacity: 0.5;
}

.bq-counter-note {
  margin: 6px 0 0;
  padding: 8px 10px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--muted);
}

.bq-feedback {
  margin: 0 0 6px;
  font-weight: 600;
}

.bq-feedback:empty {
  display: none;
}

.bq-feedback.is-yes {
  color: var(--good);
}

.bq-feedback.is-no {
  color: #fda4af;
}

.bq-feedback.is-almost {
  color: var(--amber);
}

.bq-hint {
  margin: 0 0 8px;
  padding: 8px 12px;
  border-left: 3px solid var(--violet);
  border-radius: 0 8px 8px 0;
  background: var(--violet-soft);
}

.bq-hint:empty {
  display: none;
}

.bq-stars {
  margin: 0;
  font-weight: 700;
}

.bq-stars-icons {
  font-size: 1.6rem;
  letter-spacing: 2px;
  color: var(--amber);
  vertical-align: middle;
}

.bq-pz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.bq-pz-actions .btn {
  min-width: 6.25rem;
}

/* ---------- Overlays (complete, lost, loading) ---------- */

.bq-overlay {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: 16px;
  background: rgba(8, 9, 11, 0.74);
}

.bq-game.is-2d .bq-overlay {
  position: fixed;
  z-index: 60;
}

.bq-overlay[hidden] {
  display: none !important;
}

.bq-card {
  width: 100%;
  max-width: 34rem;
  max-height: 100%;
  margin: auto;
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-raised);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.bq-card h2 {
  font-size: 1.6rem;
}

.bq-card h2:focus {
  outline: none;
}

.bq-loading .bq-card {
  max-width: 18rem;
  text-align: center;
  font-weight: 700;
}

.bq-complete-total {
  font-size: 1.25rem;
}

.bq-complete-total strong {
  color: var(--amber);
}

.bq-complete-list {
  max-height: 38vh;
  margin: 0 0 12px;
  padding: 0;
  overflow-y: auto;
  list-style: none;
}

.bq-complete-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
  border-bottom: 1px solid var(--line);
}

.bq-complete-stars {
  white-space: nowrap;
  color: var(--amber);
}

.bq-complete-unlock {
  font-weight: 700;
  color: var(--good);
}

/* ---------- Small screens ---------- */

@media (max-width: 700px) {
  .bq-game.is-3d .bq-puzzle {
    max-height: 72%;
    padding: 0 6px 6px;
  }

  .bq-pz-card {
    padding: 10px 12px 12px;
  }

  .bq-eq {
    gap: 4px 8px;
  }

  .bq-step {
    width: 44px;
  }

  .bq-coef-input {
    width: 48px;
    height: 48px;
  }

  .bq-hud-label {
    display: none;
  }

  .bq-hud-world {
    display: none;
  }

  .bq-help {
    font-size: 0.8125rem;
  }
}

@media (max-width: 520px) {
  .bq-gate2d {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .bq-gate2d .btn {
    grid-column: 1 / -1;
  }

  .bq-hero-icon {
    width: 48px;
    height: 48px;
  }
}

@media (max-height: 560px) and (min-width: 701px) {
  .bq-game.is-3d .bq-puzzle {
    max-height: 70%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bq-prompt {
    animation: none;
  }
}

/* ---------- Story: opening screens, Professor Mole, the ending (js/story.js) ---------- */

.bq-worlds-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 20px 0 12px;
}

.bq-worlds-head .bq-section-title {
  margin: 0;
}

.bq-section-title:focus:not(:focus-visible) {
  outline: none;
}

.bq-face {
  display: block;
  border-radius: 50%;
  background: #2a3441;
}

.bq-story-btn {
  padding-left: 8px;
}

.bq-story-btn .bq-face {
  width: 30px;
  height: 30px;
}

/* The story screens */
.bq-story {
  padding: 4px 0 24px;
}

.bq-story-card {
  max-width: 54rem;
  margin: 8px auto 0;
  padding: 16px 20px 18px;
}

.bq-story-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.bq-story-kicker {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.bq-story-skip {
  flex: none;
  border-color: rgba(255, 255, 255, 0.42);
}

.bq-story-body {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.bq-story-art {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  min-height: 190px;
  overflow: hidden;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: radial-gradient(circle at 50% 55%, rgba(251, 191, 36, 0.22), transparent 66%), rgba(255, 255, 255, 0.03);
}

.bq-story-art[data-mood="violet"] {
  background: radial-gradient(circle at 50% 55%, rgba(167, 139, 250, 0.3), transparent 66%), rgba(255, 255, 255, 0.03);
}

.bq-story-art[data-mood="teal"] {
  background: radial-gradient(circle at 50% 55%, rgba(45, 212, 191, 0.24), transparent 66%), rgba(255, 255, 255, 0.03);
}

.bq-story-img {
  width: 180px;
  height: auto;
  margin-bottom: 10px;
}

/* Professor Mole is a bust portrait: he sits on the bottom edge of the frame */
.bq-story-img.is-bust {
  margin-bottom: -16px;
}

.bq-story-art.is-pair .bq-story-img {
  width: 140px;
}

.bq-story-art.is-pair .bq-story-img--small {
  width: 120px;
  margin-bottom: 14px;
}

.bq-story-title {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 1.25rem + 1.3vw, 2.2rem);
  border-radius: 6px;
}

.bq-story-title:focus {
  outline: none;
}

.bq-story-title:focus-visible {
  outline: none;
  text-decoration: underline;
  text-decoration-color: var(--focus);
  text-decoration-thickness: 3px;
  text-underline-offset: 8px;
}

.bq-story-p {
  max-width: 38rem;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.bq-story-p strong {
  color: var(--amber);
}

.bq-story-worlds {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.bq-story-worlds li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 4px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--glass);
  font-size: 0.9375rem;
  font-weight: 700;
}

.bq-story-wnum {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #74c463;
  color: var(--on-accent);
  font-size: 0.8125rem;
}

.bq-story-worlds [data-theme="caves"] .bq-story-wnum {
  background: #c4b5fd;
}

.bq-story-worlds [data-theme="volcano"] .bq-story-wnum {
  background: #ff8a4c;
}

.bq-story-worlds [data-theme="ocean"] .bq-story-wnum {
  background: #5cc8e0;
}

.bq-story-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.bq-story-nav .btn {
  min-width: 7.5rem;
}

.bq-story-back:disabled {
  opacity: 0.4;
  cursor: default;
}

.bq-story-dots {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bq-story-dots li {
  width: 10px;
  height: 10px;
  border-radius: 5px;
  background: var(--line-strong);
  transition: width 0.25s ease, background-color 0.25s ease;
}

.bq-story-dots li.is-on {
  width: 26px;
  background: var(--teal);
}

.bq-story-body.is-fwd {
  animation: bq-story-in-fwd 0.35s ease-out both;
}

.bq-story-body.is-back {
  animation: bq-story-in-back 0.35s ease-out both;
}

@keyframes bq-story-in-fwd {
  from { opacity: 0; transform: translateX(24px); }
  to { opacity: 1; transform: none; }
}

@keyframes bq-story-in-back {
  from { opacity: 0; transform: translateX(-24px); }
  to { opacity: 1; transform: none; }
}

@media (min-width: 720px) {
  .bq-story-body {
    grid-template-columns: minmax(0, 19rem) minmax(0, 1fr);
    align-items: center;
    gap: 28px;
  }

  .bq-story-art {
    min-height: 230px;
  }
}

@media (max-width: 480px) {
  .bq-story-card {
    padding: 12px 14px 14px;
  }

  .bq-story-brand {
    display: none;
  }

  .bq-story-art {
    min-height: 150px;
    padding: 10px;
  }

  .bq-story-img {
    width: 140px;
  }

  .bq-story-img.is-bust {
    margin-bottom: -10px;
  }

  .bq-story-art.is-pair .bq-story-img {
    width: 120px;
  }

  .bq-story-art.is-pair .bq-story-img--small {
    width: 104px;
  }

  .bq-story-p {
    font-size: 1rem;
  }

  .bq-story-nav .btn {
    min-width: 0;
  }

  .bq-story-dots {
    order: -1;
    justify-content: center;
    width: 100%;
  }
}

/* Professor Mole's speech bubble: floats over the 3D view, sits above the list in simple mode */
.bq-mole-bubble {
  position: absolute;
  top: 60px;
  left: 8px;
  z-index: 5;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: min(30rem, calc(100% - 16px));
}

.bq-game.is-2d .bq-mole-bubble {
  position: relative;
  top: auto;
  left: auto;
  width: auto;
  max-width: 40rem;
  margin: 0 0 12px;
}

/* On touch screens the gate prompt sits under the top bar: make room for it. */
.bq-touch-device .bq-game.is-3d .bq-prompt:not([hidden]) ~ .bq-mole-bubble {
  top: 140px;
}

.bq-mole-bubble.is-in {
  animation: bq-bubble-in 0.35s cubic-bezier(0.2, 1.3, 0.4, 1) both;
}

@keyframes bq-bubble-in {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

.bq-face-ring {
  flex: none;
  display: block;
  width: 56px;
  height: 56px;
  overflow: hidden;
  border: 3px solid var(--teal);
  border-radius: 50%;
  background: #2a3441;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.bq-face-ring .bq-face {
  width: 100%;
  height: 100%;
}

.bq-bubble-box {
  position: relative;
  flex: 1;
  min-width: 0;
  padding: 8px 48px 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #0f1318;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
}

/* the little tail pointing at his face */
.bq-bubble-box::before {
  content: "";
  position: absolute;
  top: 20px;
  left: -8px;
  width: 14px;
  height: 14px;
  border-bottom: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
  background: #0f1318;
  transform: rotate(45deg);
}

.bq-bubble-name {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
}

.bq-bubble-line {
  margin: 2px 0 0;
  font-size: 0.9375rem;
  line-height: 1.45;
}

.bq-bubble-line strong {
  color: var(--amber);
}

.bq-bubble-close {
  position: absolute;
  top: 2px;
  right: 2px;
  border-color: transparent;
  background: transparent;
}

@media (max-width: 700px) {
  .bq-mole-bubble {
    gap: 10px;
  }

  .bq-face-ring {
    width: 46px;
    height: 46px;
  }

  .bq-bubble-box::before {
    top: 15px;
  }
}

/* Professor Mole's line on the world-complete card */
.bq-mole-say {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  padding: 10px 12px;
  border: 1px solid rgba(45, 212, 191, 0.35);
  border-radius: var(--radius-sm);
  background: var(--teal-soft);
}

.bq-face-ring--sm {
  width: 46px;
  height: 46px;
  border-width: 2px;
  box-shadow: none;
}

.bq-mole-say-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.bq-mole-say-text > strong {
  color: var(--teal);
}

/* The ending, after the World 4 boss */
.bq-ending {
  z-index: 9;
  background: rgba(8, 9, 11, 0.86);
}

.bq-ending-card {
  max-width: 36rem;
  max-height: none;
  background: radial-gradient(28rem 14rem at 50% 0%, rgba(251, 191, 36, 0.16), transparent 70%), var(--bg-raised);
}

.bq-ending-art {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 6px;
  margin: 0 0 6px;
}

.bq-ending-img {
  width: 150px;
  height: auto;
}

.bq-ending-img--mole {
  width: 112px;
}

.bq-ending-card .bq-story-kicker,
.bq-ending-card h2 {
  text-align: center;
}

.bq-ending-card .bq-story-kicker {
  margin-bottom: 4px;
}

.bq-ending-stars {
  font-weight: 700;
}

.bq-ending-stars strong {
  color: var(--amber);
}

.bq-ending-card .bq-actions {
  justify-content: center;
}

@media (max-width: 480px) {
  .bq-ending {
    padding: 10px;
  }

  .bq-ending-card {
    padding: 14px 16px 16px;
  }

  .bq-ending-card h2 {
    font-size: 1.4rem;
  }

  .bq-ending-card p {
    margin-bottom: 0.75em;
    font-size: 0.9375rem;
  }

  .bq-ending-img {
    width: 112px;
  }

  .bq-ending-img--mole {
    width: 84px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bq-story-body.is-fwd,
  .bq-story-body.is-back,
  .bq-mole-bubble.is-in {
    animation: none;
  }

  .bq-story-dots li {
    transition: none;
  }
}