/* ==========================================================================
   TERM Lab Park — Theme & Layout
   Retro-fun Rollercoaster-Tycoon laboratory: dark night lab, phenol-red
   pink accent, rounded friendly UI, pixel flair (Silkscreen).
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Silkscreen:wght@400;700&family=Nunito:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap");

/* ==========================================================================
   1. DESIGN TOKENS  (contract names — consumed by render.js too)
   ========================================================================== */
:root {
  /* contract tokens */
  --bg-deep: #0a0f1e;
  --bg-panel: #141a2e;
  --ink: #e8ecff;
  --accent-med: #ff5d8f;   /* phenol-red pink — primary accent */
  --accent-ok: #7ee081;    /* healthy green */
  --accent-warn: #ffd166;  /* media / amber */
  --accent-bad: #b967ff;   /* contamination purple */
  --accent-info: #4cc9f0;  /* info blue */
  --grid-line: rgba(120, 140, 255, 0.14);
  --floor-green: #2a3a2f;  /* grass floor */
  --path-green: #3b4a3d;   /* path */

  /* derived tokens */
  --bg-raised: #1b2440;
  --bg-hover: #222c4d;
  --bg-active: #0e1426;
  --ink-dim: #9aa6d4;
  --ink-faint: #6b77a8;
  --accent-soft: rgba(255, 93, 143, 0.14);
  --accent-ok-soft: rgba(126, 224, 129, 0.14);
  --accent-warn-soft: rgba(255, 209, 102, 0.14);
  --accent-bad-soft: rgba(185, 103, 255, 0.14);
  --accent-info-soft: rgba(76, 201, 240, 0.14);
  --outline: #0a0f1e;
  --border: rgba(120, 140, 255, 0.22);
  --border-strong: rgba(120, 140, 255, 0.38);
  --shadow: 0 6px 0 rgba(0, 0, 0, 0.35);
  --shadow-press: 0 2px 0 rgba(0, 0, 0, 0.35);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --font-display: "Silkscreen", "Courier New", monospace;
  --font-body: "Nunito", "Segoe UI", system-ui, sans-serif;
  --drawer-w: 380px;
}

/* ==========================================================================
   2. BASE / RESET
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scrollbar-color: var(--accent-med) var(--bg-panel);
}

body {
  background:
    radial-gradient(1000px 600px at 70% -10%, rgba(76, 201, 240, 0.07), transparent 60%),
    radial-gradient(900px 700px at 10% 110%, rgba(255, 93, 143, 0.06), transparent 60%),
    var(--bg-deep);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

#term-sim-root {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px clamp(12px, 3vw, 32px) 48px;
}

/* ==========================================================================
   3. HEADINGS — Silkscreen pixel flair
   ========================================================================== */
h1, h2, h3, h4, .pixel-label {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.25;
  text-shadow: 0 3px 0 rgba(0, 0, 0, 0.45);
  color: var(--ink);
}

h1 {
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
}

h2 {
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
}

h3 {
  font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  letter-spacing: 0.04em;
}

h4 {
  font-size: 0.85rem;
  letter-spacing: 0.03em;
}

p {
  margin: 0 0 0.7em;
}

a {
  color: var(--accent-info);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
}

/* ==========================================================================
   4. APP SHELL — desktop split grid
   ========================================================================== */
.term-app {
  display: grid;
  grid-template-columns: minmax(0, 58%) minmax(0, 42%);
  gap: clamp(16px, 2.5vw, 28px);
  align-items: start;
}

/* --- Canvas area --- */
.canvas-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 3px solid var(--border-strong);
  box-shadow: var(--shadow), 0 0 0 1px rgba(0, 0, 0, 0.4);
  background: var(--floor-green);
}

.canvas-wrap canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
}

/* CRT / scanline overlay — above canvas, never intercepts clicks */
.scanlines {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.028) 0px,
    rgba(255, 255, 255, 0.028) 1px,
    rgba(0, 0, 0, 0.06) 2px,
    rgba(0, 0, 0, 0.06) 3px
  );
  mix-blend-mode: overlay;
  border-radius: inherit;
}

/* subtle vignette on top of canvas, under controls */
.canvas-vignette {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(120% 100% at 50% 30%, transparent 55%, rgba(2, 4, 12, 0.55) 100%);
  border-radius: inherit;
}

/* --- Controls overlay: pause + speed pills, over canvas --- */
.canvas-controls {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn-pause {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink);
  background: rgba(10, 15, 30, 0.82);
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease;
}

.btn-pause:hover {
  background: rgba(27, 36, 64, 0.92);
}

.btn-pause:active,
.btn-pause.paused {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
  background: var(--accent-med);
  border-color: var(--accent-med);
  color: #14101a;
}

.speed-pills {
  display: flex;
  gap: 6px;
}

.speed-pill {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
  background: rgba(10, 15, 30, 0.82);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  min-width: 44px;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease, color 0.15s ease;
}

.speed-pill:hover {
  color: var(--ink);
  border-color: var(--border-strong);
}

.speed-pill:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

.speed-pill.active {
  color: #14101a;
  background: var(--accent-med);
  border-color: var(--accent-med);
  box-shadow: 0 3px 0 rgba(120, 20, 60, 0.55);
}

/* mode banner the renderer draws in-canvas reads these tokens */

/* --- Content panel --- */
.content-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

/* ==========================================================================
   5. SCREENS
   ========================================================================== */
.screen {
  display: none;
  animation: screen-in 0.28s ease both;
}

.screen.active {
  display: block;
}

@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Level header --- */
.level-header {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.level-header .phase-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-warn);
  margin-bottom: 6px;
}

.level-header h2 {
  margin-bottom: 4px;
}

.level-header .milestone {
  color: var(--ink-dim);
  font-size: 0.92rem;
  font-style: italic;
}

/* ==========================================================================
   6. MAP SCREEN — level path with nodes
   ========================================================================== */
.lvl-map {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow);
  position: relative;
}

.lvl-map h1 {
  margin-bottom: 18px;
  text-align: center;
}

.lvl-path {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.lvl-path::before {
  /* dotted connector down the path */
  content: "";
  position: absolute;
  top: 34px;
  bottom: 34px;
  left: 50%;
  width: 0;
  border-left: 3px dotted rgba(120, 140, 255, 0.28);
  transform: translateX(-1.5px);
}

.lvl-node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 0 16px;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--ink);
  font-family: inherit;
  text-align: center;
  transition: transform 0.15s ease;
}

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

.lvl-node .node-disc {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--bg-raised);
  border: 3px solid var(--border-strong);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--ink-dim);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.lvl-node .node-phase {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.lvl-node .node-title {
  max-width: 220px;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--ink);
}

.lvl-node:hover .node-disc {
  transform: scale(1.06);
}

/* unlocked but not yet played: pink ring */
.lvl-node:not(.locked):not(.passed):not(.active) .node-disc {
  border-color: var(--accent-med);
  color: var(--accent-med);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-soft);
}

/* passed: green + star */
.lvl-node.passed .node-disc {
  border-color: var(--accent-ok);
  color: #0a1a10;
  background: var(--accent-ok);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-ok-soft);
}

.lvl-node.passed .node-title::after {
  content: " \2605";
  color: var(--accent-ok);
}

/* active / current: pulsing pink */
.lvl-node.active .node-disc {
  border-color: var(--accent-med);
  color: #14101a;
  background: var(--accent-med);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-soft);
  animation: node-pulse 1.8s ease-in-out infinite;
}

.lvl-node.active .node-title {
  color: var(--accent-med);
}

/* locked: grayscale + lock glyph */
.lvl-node.locked {
  cursor: not-allowed;
  filter: grayscale(1);
  opacity: 0.55;
}

.lvl-node.locked:hover {
  transform: none;
}

.lvl-node.locked:hover .node-disc {
  transform: none;
}

.lvl-node.locked .node-disc::after {
  content: "\1F512";
  position: absolute;
  font-size: 13px;
}

.lvl-node.locked .node-disc {
  position: relative;
  border-color: var(--ink-faint);
  color: var(--ink-faint);
}

@keyframes node-pulse {
  0%, 100% {
    box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-soft);
  }
  50% {
    box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 9px rgba(255, 93, 143, 0.22);
  }
}

/* stars row (quizzes, results) */
.stars {
  display: inline-flex;
  gap: 4px;
  font-size: 18px;
  line-height: 1;
  color: var(--ink-faint);
  letter-spacing: 2px;
}

.stars .star {
  color: var(--ink-faint);
  text-shadow: none;
}

.stars .star.filled {
  color: var(--accent-warn);
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
}

/* level stage label inside intro/recap */
.lvl-stage {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-info);
  background: var(--accent-info-soft);
  border: 2px solid rgba(76, 201, 240, 0.35);
  border-radius: 999px;
  padding: 5px 12px;
}

/* ==========================================================================
   7. CARDS / LEARN
   ========================================================================== */
.card {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow);
}

.learn-card {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-left: 5px solid var(--accent-med);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.learn-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.learn-card h3 {
  color: var(--accent-med);
  margin-bottom: 8px;
}

.learn-card p:last-child {
  margin-bottom: 0;
}

.dot-divider {
  border: none;
  border-top: 3px dotted rgba(120, 140, 255, 0.28);
  margin: 20px 0;
}

/* ==========================================================================
   8. QUIZ
   ========================================================================== */
.quiz {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz .quiz-q {
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.quiz .quiz-prompt {
  color: var(--ink-dim);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink);
  background: var(--bg-raised);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  cursor: pointer;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35);
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease, border-color 0.15s ease;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--accent-info);
  background: var(--bg-hover);
}

.quiz-option:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.35);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option.selected {
  border-color: var(--accent-info);
  background: var(--accent-info-soft);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35), 0 0 0 3px rgba(76, 201, 240, 0.18);
}

.quiz-option.correct {
  border-color: var(--accent-ok);
  background: var(--accent-ok-soft);
  color: var(--accent-ok);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35), 0 0 0 3px var(--accent-ok-soft);
  animation: correct-pulse 0.8s ease 2;
}

.quiz-option.wrong {
  border-color: var(--accent-bad);
  background: var(--accent-bad-soft);
  color: var(--accent-bad);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35);
  animation: wrong-shake 0.45s ease;
}

@keyframes correct-pulse {
  0%, 100% {
    box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35), 0 0 0 3px var(--accent-ok-soft);
  }
  50% {
    box-shadow: 0 4px 0 rgba(0, 0, 0, 0.35), 0 0 0 9px rgba(126, 224, 129, 0.28);
  }
}

@keyframes wrong-shake {
  0%, 100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-7px);
  }
  40% {
    transform: translateX(7px);
  }
  60% {
    transform: translateX(-5px);
  }
  80% {
    transform: translateX(5px);
  }
}

.quiz-explain {
  background: var(--bg-panel);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.94rem;
  color: var(--ink-dim);
  animation: screen-in 0.25s ease both;
}

.quiz-explain b {
  color: var(--accent-warn);
}

/* ==========================================================================
   9. RECAP — accordion + references
   ========================================================================== */
.recap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recap .recap-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
}

.recap-item {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease;
}

.recap-item.open {
  border-color: var(--border-strong);
}

.recap-item .recap-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 800;
  padding: 15px 16px;
  cursor: pointer;
}

.recap-item .recap-toggle:hover {
  background: var(--bg-raised);
}

.recap-item .chevron {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--bg-raised);
  border: 2px solid var(--border);
  color: var(--accent-med);
  font-family: var(--font-display);
  font-size: 12px;
  transition: transform 0.22s ease, background 0.15s ease;
}

.recap-item .recap-toggle:hover .chevron {
  background: var(--bg-hover);
}

.recap-item.open .chevron {
  transform: rotate(180deg);
  background: var(--accent-med);
  border-color: var(--accent-med);
  color: #14101a;
}

.recap-item .recap-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s ease;
}

.recap-item .recap-inner {
  overflow: hidden;
  min-height: 0;
}

.recap-item .recap-inner > div {
  padding: 0 16px 16px;
  color: var(--ink-dim);
  font-size: 0.94rem;
  border-top: 2px dotted rgba(120, 140, 255, 0.2);
  padding-top: 12px;
  margin-left: 16px;
  margin-right: 16px;
}

.recap-item.open .recap-body {
  grid-template-rows: 1fr;
}

.recap-item .recap-inner b.obj {
  color: var(--accent-info);
}

/* references */
.recap .refs {
  margin-top: 4px;
}

.refs h3 {
  color: var(--accent-warn);
  margin-bottom: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ref-item {
  display: flex;
  gap: 10px;
  align-items: baseline;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.ref-item .ref-n {
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--accent-med);
  flex: none;
}

.ref-item .ref-meta {
  color: var(--ink-dim);
  font-size: 0.84rem;
}

.ref-item .ref-meta .ref-label {
  display: block;
  color: var(--ink);
  font-weight: 700;
}

/* ==========================================================================
   10. BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-strong);
  padding: 13px 22px;
  cursor: pointer;
  color: var(--ink);
  background: var(--bg-raised);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease, border-color 0.15s ease, filter 0.15s ease;
}

.btn:hover {
  background: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(0, 0, 0, 0.35);
}

.btn:active {
  transform: translateY(3px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.35);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
}

.btn-primary {
  background: var(--accent-med);
  border-color: var(--accent-med);
  color: #14101a;
  box-shadow: 0 5px 0 rgba(120, 20, 60, 0.55);
}

.btn-primary:hover {
  background: #ff74a0;
  border-color: #ff74a0;
  box-shadow: 0 7px 0 rgba(120, 20, 60, 0.55);
}

.btn-primary:active {
  box-shadow: 0 2px 0 rgba(120, 20, 60, 0.55);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--ink-dim);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
}

.btn-ghost:hover {
  background: var(--bg-raised);
  color: var(--ink);
}

.btn-ghost:active {
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.35);
}

.btn-ok {
  background: var(--accent-ok);
  border-color: var(--accent-ok);
  color: #0a1a10;
  box-shadow: 0 5px 0 rgba(20, 70, 30, 0.55);
}

.btn-ok:hover {
  background: #94e996;
  border-color: #94e996;
  box-shadow: 0 7px 0 rgba(20, 70, 30, 0.55);
}

.btn-ok:active {
  box-shadow: 0 2px 0 rgba(20, 70, 30, 0.55);
}

.btn-danger {
  background: var(--accent-bad);
  border-color: var(--accent-bad);
  color: #160a1a;
  box-shadow: 0 5px 0 rgba(60, 20, 90, 0.55);
}

.btn-danger:hover {
  background: #c986ff;
  border-color: #c986ff;
  box-shadow: 0 7px 0 rgba(60, 20, 90, 0.55);
}

.btn-danger:active {
  box-shadow: 0 2px 0 rgba(60, 20, 90, 0.55);
}

.btn:disabled:hover {
  transform: none;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.btn-row .btn {
  flex: 1 1 auto;
}

/* floating info button */
.btn-info {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 22px;
  color: #14101a;
  background: var(--accent-med);
  border: 3px solid var(--accent-med);
  box-shadow: 0 5px 0 rgba(120, 20, 60, 0.55);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease;
}

.btn-info:hover {
  background: #ff74a0;
  border-color: #ff74a0;
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(120, 20, 60, 0.55);
}

.btn-info:active {
  transform: translateY(3px);
  box-shadow: 0 2px 0 rgba(120, 20, 60, 0.55);
}

/* ==========================================================================
   11. INFO DRAWER — fixed right slide-in; bottom sheet on mobile
   ========================================================================== */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(4, 7, 14, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  width: min(var(--drawer-w), 92vw);
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-left: 3px solid var(--border-strong);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.5);
  transform: translateX(105%);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  visibility: hidden;
}

.drawer.open {
  transform: translateX(0);
  visibility: visible;
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 18px 20px;
  border-bottom: 2px solid var(--border);
  background: var(--bg-raised);
}

.drawer-head h2 {
  font-size: 0.95rem;
  color: var(--accent-med);
}

.drawer-close {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  border: 2px solid var(--border-strong);
  background: var(--bg-panel);
  color: var(--ink-dim);
  font-family: var(--font-display);
  font-size: 13px;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.09s ease, box-shadow 0.09s ease, color 0.15s ease, border-color 0.15s ease;
}

.drawer-close:hover {
  color: var(--accent-med);
  border-color: var(--accent-med);
}

.drawer-close:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px 28px;
}

.drawer-section {
  margin-bottom: 22px;
}

.drawer-section h3 {
  color: var(--accent-warn);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.drawer-section p {
  color: var(--ink-dim);
  font-size: 0.92rem;
}

/* custom scrollbar for the drawer */
.drawer-body::-webkit-scrollbar {
  width: 10px;
}

.drawer-body::-webkit-scrollbar-track {
  background: var(--bg-deep);
  border-radius: 999px;
}

.drawer-body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-med), #b8456e);
  border-radius: 999px;
  border: 2px solid var(--bg-deep);
}

.drawer-body::-webkit-scrollbar-thumb:hover {
  background: #ff74a0;
}

.drawer-body {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-med) var(--bg-deep);
}

/* ==========================================================================
   12. TOASTS — top-center slide-down
   ========================================================================== */
.toast-stack {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(520px, calc(100vw - 32px));
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-panel);
  border: 2px solid var(--border-strong);
  border-left: 6px solid var(--accent-info);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
  font-weight: 700;
  font-size: 0.95rem;
  animation: toast-in 0.32s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.toast .toast-icon {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 14px;
  border-radius: 9px;
  color: var(--accent-info);
  background: var(--accent-info-soft);
  border: 2px solid rgba(76, 201, 240, 0.35);
}

.toast.ok {
  border-left-color: var(--accent-ok);
}

.toast.ok .toast-icon {
  color: var(--accent-ok);
  background: var(--accent-ok-soft);
  border-color: rgba(126, 224, 129, 0.35);
}

.toast.warn {
  border-left-color: var(--accent-warn);
}

.toast.warn .toast-icon {
  color: var(--accent-warn);
  background: var(--accent-warn-soft);
  border-color: rgba(255, 209, 102, 0.35);
}

.toast.bad {
  border-left-color: var(--accent-bad);
}

.toast.bad .toast-icon {
  color: var(--accent-bad);
  background: var(--accent-bad-soft);
  border-color: rgba(185, 103, 255, 0.35);
}

.toast.media {
  border-left-color: var(--accent-med);
}

.toast.media .toast-icon {
  color: var(--accent-med);
  background: var(--accent-soft);
  border-color: rgba(255, 93, 143, 0.35);
}

.toast.hide {
  animation: toast-out 0.28s ease both;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-24px) scale(0.96);
  }
}

/* ==========================================================================
   13. PROGRESS BARS — accent fill + transition
   ========================================================================== */
.progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-track {
  position: relative;
  height: 16px;
  background: var(--bg-deep);
  border: 2px solid var(--border-strong);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5);
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(180deg, var(--accent-med), #d64a7b);
  border-radius: 999px 0 0 999px;
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 0 10px rgba(255, 93, 143, 0.45);
}

.progress.fill-ok .progress-fill {
  background: linear-gradient(180deg, var(--accent-ok), #5db95f);
  box-shadow: 0 0 10px rgba(126, 224, 129, 0.45);
}

.progress-track.pixel {
  border-radius: 4px;
}

.progress-track.pixel .progress-fill {
  border-radius: 2px;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
}

.progress-meta .pct {
  color: var(--accent-med);
}

.progress-stripes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.08) 0 8px,
    transparent 8px 16px
  );
  background-size: 200% 100%;
  animation: stripes-move 1.2s linear infinite;
}

@keyframes stripes-move {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 45px 0;
  }
}

/* ==========================================================================
   14. RESULTS / MISC
   ========================================================================== */
.result-banner {
  text-align: center;
  padding: 8px 0 4px;
}

.result-banner .result-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  color: var(--accent-warn);
  margin: 8px 0 4px;
}

.result-banner .result-sub {
  color: var(--ink-dim);
  font-size: 0.95rem;
}

.intro-body {
  color: var(--ink-dim);
}

.intro-body p {
  margin-bottom: 0.9em;
}

.intro-prompt {
  background: var(--accent-soft);
  border: 2px dashed rgba(255, 93, 143, 0.4);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-weight: 800;
  color: var(--accent-med);
  font-size: 0.98rem;
  margin: 4px 0 14px;
}

/* ==========================================================================
   15. RESPONSIVE — mobile < 720px
   ========================================================================== */
.drawer-open-scrim {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 14, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 44;
}

.drawer-backdrop.open + .drawer-open-scrim,
.drawer-open-scrim.open {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 719px) {
  body {
    font-size: 15px;
  }

  #term-sim-root {
    padding: 12px 12px 88px;
  }

  .term-app {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .canvas-wrap {
    order: 0;
    max-height: 42vh;
    min-height: 220px;
  }

  .canvas-wrap canvas {
    width: 100%;
    height: auto;
    max-height: 42vh;
    object-fit: cover;
  }

  .content-panel {
    order: 1;
  }

  .canvas-controls {
    top: 8px;
    right: 8px;
    gap: 6px;
  }

  .speed-pill {
    min-width: 38px;
    padding: 5px 8px;
    font-size: 11px;
  }

  .btn-pause {
    padding: 6px 10px;
    font-size: 11px;
  }

  /* drawer becomes a bottom sheet */
  .drawer {
    top: auto;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    max-height: 78vh;
    border-left: none;
    border-top: 3px solid var(--border-strong);
    border-radius: 20px 20px 0 0;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.5);
    transform: translateY(105%);
  }

  .drawer.open {
    transform: translateY(0);
  }

  .drawer-body {
    padding-bottom: 24px;
  }

  .toast-stack {
    top: 10px;
    width: calc(100vw - 24px);
  }

  .toast {
    font-size: 0.9rem;
    padding: 11px 13px;
  }

  .lvl-node .node-disc {
    width: 52px;
    height: 52px;
    font-size: 14px;
  }

  .btn-info {
    right: 14px;
    bottom: 14px;
    width: 50px;
    height: 50px;
  }
}

/* ==========================================================================
   16. ACCESSIBILITY — reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }

  .lvl-node.active .node-disc,
  .quiz-option.correct,
  .quiz-option.wrong,
  .scanlines,
  .progress-stripes {
    animation: none !important;
  }

  .btn:hover,
  .btn-primary:hover,
  .btn-ghost:hover,
  .btn-ok:hover,
  .btn-danger:hover,
  .btn-info:hover,
  .lvl-node:hover,
  .learn-card:hover {
    transform: none !important;
  }
}

/* ==========================================================================
   17. RUNTIME DOM — app.js SELECTORS
   app.js owns the polished UI and generates its own class names; this section
   wires them to the exact design tokens/intent the contract section above
   defined for the render.js-era names (map<->lvl-map, node<->lvl-node, …).
   ========================================================================== */

/* --- App shell + screens --- */
#term-sim-root .app {
  display: block;
  min-height: 60vh;
}

/* --- Shared badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-info);
  background: var(--accent-info-soft);
  border: 2px solid rgba(76, 201, 240, 0.35);
  border-radius: 999px;
  padding: 5px 12px;
}

/* ==========================================================================
   17a. MAP SCREEN (screen-map) — winding path with alternating node cards
   ========================================================================== */
.screen-map {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(16px, 3vw, 28px);
  box-shadow: var(--shadow);
  position: relative;
}

.map-splash {
  text-align: center;
  margin-bottom: 22px;
}

.map-title-row {
  display: flex;
  justify-content: center;
  gap: 2px;
  flex-wrap: wrap;
  margin: 4px 0 10px;
}

.map-title-letter {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
  text-shadow: 0 3px 0 rgba(0, 0, 0, 0.45);
  animation: title-pop 0.35s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.map-title-space {
  width: 0.42em;
}

@keyframes title-pop {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.92);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.map-subtitle {
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.map-tagline {
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.map-levels {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.map-node-row {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(520px, 100%);
  padding: 10px 0;
}

.map-node-row.col-left {
  flex-direction: row;
  justify-content: flex-start;
}

.map-node-row.col-right {
  flex-direction: row-reverse;
  justify-content: flex-start;
}

.map-node {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid var(--accent-med);
  background: var(--bg-raised);
  color: var(--accent-med);
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-soft);
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

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

.map-node.locked {
  cursor: not-allowed;
  filter: grayscale(1);
  opacity: 0.55;
  border-color: var(--ink-faint);
  color: var(--ink-faint);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35);
}

.map-node.passed {
  border-color: var(--accent-ok);
  background: var(--accent-ok);
  color: #0a1a10;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.35), 0 0 0 4px var(--accent-ok-soft);
}

.map-node.shake {
  animation: wrong-shake 0.45s ease;
}

.map-node-badge {
  pointer-events: none;
}

.map-node-stars {
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  gap: 2px;
  white-space: nowrap;
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 1px 6px;
  font-size: 11px;
  line-height: 1.2;
}

.map-node-stars .star {
  color: var(--ink-faint);
}

.map-node-stars .star.on {
  color: var(--accent-warn);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

.map-lock {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 20px;
  pointer-events: none;
}

.map-lock::before {
  content: "\1F512";
}

.map-node-label {
  flex: 1;
  min-width: 0;
  font-weight: 800;
  font-size: 0.98rem;
  line-height: 1.3;
}

.map-node-row.col-right .map-node-label {
  text-align: right;
}

.map-connector {
  position: relative;
  z-index: 0;
  width: 3px;
  height: 34px;
  border-left: 3px dotted rgba(120, 140, 255, 0.28);
}

.map-foot {
  margin: 22px auto 0;
  max-width: 520px;
  text-align: center;
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.map-empty {
  color: var(--ink-dim);
  text-align: center;
  padding: 24px 0;
}

/* ==========================================================================
   17b. INTRO SCREEN (screen-intro)
   ========================================================================== */
.intro-card {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: var(--shadow);
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.intro-badge {
  align-self: flex-start;
}

.intro-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  color: var(--accent-med);
}

.intro-body p {
  margin-bottom: 0.9em;
}

.intro-prompt {
  margin-top: 4px;
}

.intro-prompt-label {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-med);
  margin-bottom: 4px;
}

.intro-prompt-text {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
}

.intro-learn {
  background: var(--bg-raised);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.intro-learn-title {
  color: var(--accent-ok);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.intro-learn-list {
  margin: 0;
  padding-left: 18px;
}

.intro-learn-item {
  margin-bottom: 4px;
  color: var(--ink-dim);
}

.intro-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.intro-actions .btn {
  flex: 1 1 auto;
}

/* ==========================================================================
   17c. SIM SCREEN (screen-sim) — canvas 58% left, panel right; canvas 42vh on mobile
   ========================================================================== */
.screen-sim {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(14px, 2.5vw, 22px);
  box-shadow: var(--shadow);
}

.sim-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.btn-small {
  font-size: 11px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
}

.sim-title {
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: var(--accent-med);
  letter-spacing: 0.04em;
}

.sim-hud {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-layout {
  display: grid;
  grid-template-columns: minmax(0, 58%) minmax(0, 42%);
  gap: clamp(12px, 2vw, 20px);
  align-items: start;
}

.sim-canvas-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 3px solid var(--border-strong);
  box-shadow: var(--shadow);
  background: var(--floor-green);
  min-height: 280px;
}

.sim-canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  min-height: 280px;
}

.sim-controls {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-control {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink);
  background: rgba(10, 15, 30, 0.82);
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.4);
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-control:hover {
  background: rgba(27, 36, 64, 0.92);
  border-color: var(--accent-med);
}

.btn-control:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

.sim-speeds {
  display: flex;
  gap: 6px;
}

.sim-speeds .speed-pill {
  min-width: 42px;
  padding: 6px 10px;
}

.sim-status {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--accent-ok);
  background: rgba(10, 15, 30, 0.82);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  white-space: nowrap;
}

.sim-status.paused {
  color: var(--accent-warn);
}

.sim-clock {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--ink-dim);
  background: rgba(10, 15, 30, 0.82);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  white-space: nowrap;
}

.sim-stations {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sim-station {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: rgba(10, 15, 30, 0.85);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 4px 9px;
}

.sim-station.active {
  color: var(--accent-ok);
  border-color: var(--accent-ok);
  background: rgba(18, 32, 20, 0.85);
  box-shadow: 0 0 8px rgba(126, 224, 129, 0.35);
}

.sim-panel {
  background: var(--bg-raised);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  min-width: 0;
}

.sim-stage {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-med);
  background: var(--accent-soft);
  border: 2px solid rgba(255, 93, 143, 0.35);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 12px;
}

.sim-body {
  min-height: 120px;
}

.sim-toasts {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 6;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: min(300px, calc(100vw - 48px));
}

.sim-toasts .toast {
  font-size: 0.85rem;
  padding: 11px 13px;
}

/* --- Learn stage --- */
.learn-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 12px;
}

.learn-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--border-strong);
}

.learn-dot.on {
  background: var(--accent-med);
  border-color: var(--accent-med);
}

.learn-nav {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.learn-nav .btn {
  flex: 1 1 auto;
}

/* --- Quiz stage --- */
.quiz-gate {
  text-align: center;
  padding: 10px 0 4px;
}

.quiz-gate-title {
  color: var(--accent-med);
  margin-bottom: 6px;
}

.quiz-gate-sub {
  color: var(--ink-dim);
  margin-bottom: 16px;
}

.quiz-progress {
  height: 12px;
  background: var(--bg-deep);
  border: 2px solid var(--border-strong);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 12px;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(180deg, var(--accent-med), #d64a7b);
  border-radius: 999px;
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 0 10px rgba(255, 93, 143, 0.45);
}

.quiz-counter {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  margin-bottom: 6px;
}

.quiz-awarded {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-ok);
  background: var(--accent-ok-soft);
  border: 2px solid rgba(126, 224, 129, 0.35);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  margin-bottom: 10px;
}

.quiz-question {
  margin-bottom: 12px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.quiz-feedback {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-verdict {
  font-weight: 800;
  border-radius: var(--radius-md);
  padding: 12px 14px;
  border: 2px solid;
  animation: screen-in 0.25s ease both;
}

.quiz-verdict.ok {
  color: var(--accent-ok);
  background: var(--accent-ok-soft);
  border-color: rgba(126, 224, 129, 0.5);
}

.quiz-verdict.bad {
  color: var(--accent-bad);
  background: var(--accent-bad-soft);
  border-color: rgba(185, 103, 255, 0.5);
}

.quiz-nav {
  display: flex;
}

.quiz-nav .btn {
  flex: 1 1 auto;
}

/* --- Done / results stage --- */
.done-panel {
  text-align: center;
  padding: 8px 0 4px;
}

.done-title {
  font-family: var(--font-display);
  color: var(--accent-ok);
  margin-bottom: 8px;
}

.done-title.fail {
  color: var(--accent-bad);
}

.done-stars {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 30px;
  line-height: 1;
  margin-bottom: 10px;
}

.star {
  color: var(--ink-faint);
}

.star.on {
  color: var(--accent-warn);
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
}

.star.big {
  font-size: 34px;
}

.done-score {
  color: var(--ink-dim);
  max-width: 380px;
  margin: 0 auto 12px;
}

.done-hint {
  color: var(--accent-info);
  font-weight: 700;
  margin-bottom: 12px;
}

.done-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.done-actions .btn {
  flex: 0 1 auto;
  min-width: 140px;
}

/* --- Toast kinds (app.js builds "toast toast-<kind>") --- */
.toast-info {
  border-left-color: var(--accent-info);
}

.toast-teach {
  border-left-color: var(--accent-ok);
}

.toast-warn {
  border-left-color: var(--accent-warn);
}

.toast.toast-out {
  animation: toast-out 0.28s ease both;
}

/* ==========================================================================
   17d. RECAP SCREEN (screen-recap) — card + accordion + refs
   ========================================================================== */
.recap-card {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: var(--shadow);
  max-width: 760px;
  margin: 0 auto;
}

.recap-badge {
  margin-bottom: 10px;
}

.recap-title {
  font-family: var(--font-display);
  color: var(--accent-med);
  margin-bottom: 10px;
}

.recap-milestone {
  background: var(--bg-raised);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 14px;
}

.recap-milestone-label {
  display: block;
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warn);
  margin-bottom: 4px;
}

.recap-milestone-text {
  margin: 0;
  color: var(--ink-dim);
}

.recap-best {
  margin-bottom: 14px;
  font-weight: 700;
}

.recap-best-stars {
  letter-spacing: 2px;
}

.recap-best-stars .star {
  font-size: 16px;
}

.recap-best-stars .star.on {
  color: var(--accent-warn);
}

.recap-section-title {
  color: var(--accent-warn);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 18px 0 10px;
}

.recap-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.recap-refs {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.recap-ref {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
}

.recap-ref a {
  font-weight: 700;
}

.recap-ref-note {
  color: var(--ink-dim);
  font-size: 0.85rem;
}

.recap-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.recap-actions .btn {
  flex: 1 1 auto;
}

/* --- Accordion (shared: recap + drawer) --- */
.acc-item {
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease;
}

.acc-item.open {
  border-color: var(--border-strong);
}

.acc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 800;
  padding: 14px 16px;
  cursor: pointer;
}

.acc-head:hover {
  background: var(--bg-raised);
}

.acc-title {
  flex: 1 1 auto;
  min-width: 0;
}

.acc-chev {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--bg-raised);
  border: 2px solid var(--border);
  color: var(--accent-med);
  font-family: var(--font-display);
  font-size: 12px;
  transition: transform 0.22s ease, background 0.15s ease;
}

.acc-item.open .acc-chev {
  transform: rotate(90deg);
  background: var(--accent-med);
  border-color: var(--accent-med);
  color: #14101a;
}

.acc-body {
  padding: 0 16px 14px;
  padding-top: 10px;
  color: var(--ink-dim);
  font-size: 0.93rem;
  border-top: 2px dotted rgba(120, 140, 255, 0.2);
}

.acc-detail {
  margin: 0;
}

/* ==========================================================================
   17e. INFO DRAWER + FAB (app.js element is aside.info-drawer;
   backdrop toggles via inline display, so force it visible when shown)
   ========================================================================== */
.drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.info-drawer {
  background: var(--bg-panel);
  border-left: 3px solid var(--border-strong);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 2px solid var(--border);
  background: var(--bg-raised);
}

.drawer-title {
  color: var(--accent-med);
  font-size: 0.9rem;
  margin: 0;
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px 28px;
}

.drawer-where {
  background: var(--bg-raised);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 16px;
}

.drawer-where-label {
  display: block;
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 2px;
}

.drawer-where-value {
  display: block;
  font-weight: 800;
  color: var(--accent-med);
  font-size: 1.05rem;
}

.drawer-lvl {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dotted var(--border);
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.drawer-block {
  margin-bottom: 20px;
}

.drawer-block-title {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warn);
  margin: 0 0 8px;
}

.drawer-acc {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-refs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drawer-refs a {
  font-size: 0.9rem;
}

.drawer-gloss {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drawer-gloss-link {
  text-align: left;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.drawer-gloss-link:hover {
  border-color: var(--accent-med);
  background: var(--bg-hover);
  color: var(--accent-med);
}

.info-fab {
  font-family: var(--font-display);
  color: #14101a;
  background: var(--accent-med);
  border: 3px solid var(--accent-med);
  box-shadow: 0 5px 0 rgba(120, 20, 60, 0.55);
  cursor: pointer;
  transition: transform 0.09s ease, box-shadow 0.09s ease, background 0.15s ease;
}

.info-fab:hover {
  background: #ff74a0;
  border-color: #ff74a0;
  transform: translateY(-2px);
  box-shadow: 0 7px 0 rgba(120, 20, 60, 0.55);
}

.info-fab:active {
  transform: translateY(3px);
  box-shadow: 0 2px 0 rgba(120, 20, 60, 0.55);
}

/* ==========================================================================
   17f. RUNTIME RESPONSIVE — app.js layout tweaks
   ========================================================================== */
@media (max-width: 719px) {
  .sim-layout {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .sim-canvas-wrap {
    max-height: 42vh;
    min-height: 220px;
  }

  .sim-canvas {
    aspect-ratio: auto;
    height: 100%;
    max-height: 42vh;
    object-fit: cover;
    min-height: 220px;
  }

  .sim-hud {
    flex-wrap: wrap;
  }

  .sim-stations {
    top: 8px;
    left: 8px;
  }

  .sim-toasts {
    top: 8px;
    right: 8px;
  }

  .map-node {
    width: 56px;
    height: 56px;
    font-size: 15px;
  }

  .map-node-label {
    font-size: 0.9rem;
  }

  .info-fab {
    right: 14px;
    bottom: 14px;
    width: 50px;
    height: 50px;
  }

  .info-drawer {
    border-left: none;
    border-top: 3px solid var(--border-strong);
    border-radius: 16px 16px 0 0;
  }
}