:root {
  --bg: #050b12;
  --panel: rgba(7, 18, 31, 0.86);
  --panel-strong: #091522;
  --border: #263f5e;
  --text: #eaf1ff;
  --text-dim: #8295b0;
  --amber: #ffb020;
  --cyan: #2ce0ff;
  --green: #50e39a;
  --red: #ff6478;
  --font-display: 'Rajdhani', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.arcade-nav {
  min-height: 76px;
  padding: 0 clamp(18px, 5vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(255, 176, 32, 0.25);
  background: rgba(5, 24, 35, 0.96);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
}

.arcade-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  white-space: nowrap;
}
.arcade-brand img { width: 78px; filter: drop-shadow(0 0 8px rgba(44, 224, 255, 0.25)); }
.arcade-brand strong { color: var(--amber); }

.all-missions {
  min-height: 38px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(255, 176, 32, 0.5);
  border-radius: 4px;
  background: rgba(255, 176, 32, 0.08);
  color: var(--amber);
  font: 700 0.68rem var(--font-mono);
  letter-spacing: 0.1em;
}
.all-missions:hover, .all-missions:focus-visible { color: #161000; background: var(--amber); outline: 0; }

.app-stage {
  position: relative;
  min-height: calc(100vh - 76px);
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 42% 18%, rgba(31, 139, 174, 0.16), transparent 31%),
    linear-gradient(180deg, rgba(6, 29, 42, 0.62), transparent 44%),
    var(--bg);
}
.app-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(44, 224, 255, 0.17) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 224, 255, 0.17) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 78% 65% at 50% 34%, black 4%, transparent 79%);
}
.app-stage::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 90px;
  left: 50%;
  width: min(90vw, 960px);
  aspect-ratio: 1;
  transform: translateX(-50%);
  border-radius: 50%;
  opacity: 0.16;
  background: repeating-radial-gradient(circle, transparent 0 95px, rgba(44, 224, 255, 0.2) 96px 97px);
  mask-image: radial-gradient(circle, black 0 48%, transparent 74%);
}

.app { width: min(100%, 1260px); margin: 0 auto; padding: 34px 24px 54px; }
.app-header { text-align: center; }
.mission-id, .panel-kicker {
  margin: 0;
  color: var(--amber);
  font: 700 0.57rem var(--font-mono);
  letter-spacing: 0.15em;
}
.app-header h1 {
  max-width: 940px;
  margin: 8px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--cyan);
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  text-shadow: 0 0 14px rgba(44, 224, 255, 0.32);
}
.brand-hair { flex: 1; max-width: 95px; height: 1px; background: linear-gradient(90deg, transparent, rgba(44, 224, 255, 0.48)); }
.brand-hair:last-child { background: linear-gradient(90deg, rgba(44, 224, 255, 0.48), transparent); }
.subtitle { margin: 7px 0 0; color: var(--text-dim); font: 500 0.64rem var(--font-mono); letter-spacing: 0.13em; }

.trainer-modes {
  width: min(100%, 350px);
  margin: 24px auto 22px;
  padding: 4px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5px;
  border: 1px solid rgba(55, 83, 119, 0.62);
  border-radius: 6px;
  background: rgba(5, 14, 24, 0.76);
}
.mode-btn {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 3px;
  background: transparent;
  color: #7e91ab;
  font: 800 0.63rem var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.mode-btn.active { border-color: var(--amber); color: #171000; background: var(--amber); box-shadow: 0 0 18px rgba(255,176,32,.25); }

.workspace { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(390px, .9fr); gap: 18px; align-items: stretch; }
.card { border: 1px solid var(--border); border-radius: 5px; background: var(--panel); box-shadow: inset 0 1px rgba(255,255,255,.02), 0 20px 50px rgba(0,0,0,.22); }
.display-panel, .control-panel { padding: 18px; }
.panel-heading { min-height: 48px; padding-bottom: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--border); }
.panel-heading h2 { margin: 4px 0 0; font-size: 1.25rem; letter-spacing: .01em; }
.model-badge { padding: 6px 8px; border: 1px solid rgba(80,227,154,.45); color: var(--green); background: rgba(80,227,154,.06); font: 700 .48rem var(--font-mono); letter-spacing: .08em; }

.instrument-stage {
  position: relative;
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid #294765;
  background:
    radial-gradient(circle at 50% 48%, rgba(44,224,255,.08), transparent 54%),
    linear-gradient(180deg, #071422, #030a12);
}
#compass-canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 1.45 / 1;
  display: block;
  /* The canvas is display-only, so mobile swipes should remain page gestures. */
  touch-action: pan-y pinch-zoom;
}
.motion-chip {
  position: absolute;
  top: 12px;
  left: 50%;
  padding: 5px 9px;
  border: 1px solid rgba(255,176,32,.55);
  border-radius: 999px;
  transform: translateX(-50%);
  color: var(--amber);
  background: rgba(5,12,20,.92);
  font: 800 .5rem var(--font-mono);
  letter-spacing: .1em;
}

.compass-journey { margin-top: 10px; padding: 12px; border: 1px solid rgba(44,224,255,.28); background: linear-gradient(180deg, rgba(44,224,255,.045), rgba(3,12,21,.7)); }
.journey-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.journey-heading small { color: #71839c; font: 700 .4rem var(--font-mono); letter-spacing: .09em; }
.journey-heading h3 { margin: 3px 0 0; font-size: .9rem; }
.journey-heading > span { padding: 5px 8px; border: 1px solid rgba(255,176,32,.48); color: var(--amber); background: rgba(255,176,32,.05); font: 700 .4rem var(--font-mono); letter-spacing: .06em; }
.error-ribbon { margin-top: 10px; display: grid; grid-template-columns: repeat(3, 1fr); color: #647991; font: 700 .34rem var(--font-mono); letter-spacing: .05em; }
.error-ribbon[hidden] { display: none; }
.error-ribbon > span:nth-child(2) { color: var(--cyan); text-align: center; }
.error-ribbon > span:nth-child(3) { text-align: right; }
.error-rail { position: relative; height: 18px; margin-top: 5px; grid-column: 1 / -1; border-radius: 99px; background: linear-gradient(90deg, rgba(255,176,32,.06), rgba(44,224,255,.13) 50%, rgba(255,176,32,.06)); }
.error-rail::before { content: ""; position: absolute; top: 8px; right: 8px; left: 8px; height: 2px; background: #29425f; }
.actual-marker, .compass-marker { position: absolute; top: 3px; width: 12px; height: 12px; border: 2px solid #06101a; border-radius: 50%; transform: translateX(-50%); }
.actual-marker { left: 50%; z-index: 2; background: var(--cyan); box-shadow: 0 0 9px rgba(44,224,255,.45); }
.compass-marker { left: 50%; z-index: 3; background: var(--amber); box-shadow: 0 0 9px rgba(255,176,32,.45); transition: left .12s linear; }
.compass-marker[data-behavior="minimal"], .compass-marker[data-behavior="settled"] { opacity: .75; }
.journey-logic { margin-top: 8px; display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 7px; align-items: stretch; }
.journey-logic article { min-width: 0; padding: 8px; border: 1px solid rgba(42,67,96,.72); background: rgba(3,10,18,.62); text-align: center; }
.journey-logic small, .journey-logic strong, .journey-logic em { display: block; font-family: var(--font-mono); }
.journey-logic small { color: #63768e; font-size: .34rem; letter-spacing: .06em; }
.journey-logic strong { margin-top: 5px; color: var(--cyan); font-size: .7rem; line-height: 1.25; }
.journey-logic em { margin-top: 4px; color: #71859e; font-size: .35rem; font-style: normal; line-height: 1.35; letter-spacing: .025em; }
.journey-logic article:nth-of-type(2) strong { color: var(--amber); }
.journey-logic article:nth-of-type(3) strong { color: var(--green); }
.journey-logic > b { align-self: center; color: var(--cyan); font: 800 .62rem var(--font-mono); }

.display-controls { margin-top: 12px; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(220px, .65fr); gap: 10px; align-items: stretch; }
.display-controls .control-block { min-width: 0; }
.acceleration-control { display: flex; flex-direction: column; }
.acceleration-control .action-grid { flex: 1; }

.instrument-note { margin-top: 10px; padding: 9px 11px; display: flex; gap: 9px; border-left: 2px solid var(--cyan); background: rgba(44,224,255,.04); color: #8295ad; font-size: .72rem; line-height: 1.4; }
.instrument-note span { width: 18px; height: 18px; flex: 0 0 auto; display: grid; place-items: center; border: 1px solid var(--cyan); border-radius: 50%; color: var(--cyan); font: 700 .55rem var(--font-mono); }
.instrument-note p { margin: 0; }

.control-heading { align-items: flex-start; }
.reset-btn, .new-btn {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid #3b5875;
  border-radius: 3px;
  color: #91a2b8;
  background: #0a1725;
  font: 700 .5rem var(--font-mono);
  letter-spacing: .07em;
  cursor: pointer;
}
.reset-btn:hover, .new-btn:hover { color: var(--amber); border-color: var(--amber); }
.control-stack { display: grid; gap: 12px; padding-top: 12px; }
.control-block { padding: 11px; border: 1px solid rgba(38,63,94,.74); background: rgba(3,12,21,.55); }
.control-label { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: #dbe6f4; font: 700 .56rem var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }
.control-label output { color: var(--cyan); }
.control-block small { display: block; margin: 6px 0 8px; color: #71839c; font-size: .67rem; }
.range-endpoints { margin-top: 1px; display: flex; justify-content: space-between; gap: 10px; color: #5f738d; font: 700 .38rem var(--font-mono); letter-spacing: .04em; }

input[type="range"] { width: 100%; height: 22px; margin: 7px 0 0; appearance: none; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 99px; background: linear-gradient(90deg, var(--cyan), #29425f); }
input[type="range"]::-webkit-slider-thumb { width: 18px; height: 18px; margin-top: -7px; appearance: none; border: 2px solid #06101a; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px rgba(44,224,255,.45); }
input[type="range"]::-moz-range-track { height: 4px; background: #29425f; }
input[type="range"]::-moz-range-thumb { width: 16px; height: 16px; border: 2px solid #06101a; border-radius: 50%; background: var(--cyan); }

.segmented { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 9px; }
.segmented button { min-height: 36px; border: 1px solid #29425f; background: #07131f; color: #7d90a9; font: 700 .48rem var(--font-mono); text-transform: uppercase; cursor: pointer; }
.segmented button + button { border-left: 0; }
.segmented button.active { color: #171000; background: var(--amber); border-color: var(--amber); }
.segmented button:disabled { cursor: default; opacity: .42; }

.turn-simulator { border-color: rgba(44,224,255,.34); background: linear-gradient(180deg, rgba(44,224,255,.045), rgba(3,12,21,.64)); }
.turn-config { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.turn-selector > span { color: #71839c; font: 700 .4rem var(--font-mono); letter-spacing: .07em; text-transform: uppercase; }
.turn-selector .segmented { margin-top: 5px; }
.turn-selector .segmented button { min-height: 34px; }
.run-turn-btn {
  width: 100%;
  min-height: 48px;
  margin-top: 9px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--cyan);
  border-radius: 3px;
  color: var(--cyan);
  background: linear-gradient(180deg, rgba(44,224,255,.12), rgba(44,224,255,.035));
  box-shadow: inset 0 1px rgba(255,255,255,.035), 0 0 15px rgba(44,224,255,.08);
  cursor: pointer;
}
.run-turn-btn span { font: 800 1.2rem var(--font-mono); }
.run-turn-btn strong { font: 800 .52rem var(--font-mono); letter-spacing: .06em; }
.run-turn-btn:hover, .run-turn-btn:focus-visible { color: #06131c; background: var(--cyan); outline: 0; }
.run-turn-btn:disabled { cursor: default; color: var(--amber); border-color: var(--amber); background: rgba(255,176,32,.08); }
.turn-progress { margin-top: 8px; padding: 7px 9px; display: flex; align-items: center; justify-content: space-between; gap: 10px; border-left: 2px solid #35506d; background: rgba(3,10,18,.66); }
.turn-progress span, .turn-progress strong { font-family: var(--font-mono); }
.turn-progress span { color: #6f829a; font-size: .38rem; letter-spacing: .08em; }
.turn-progress strong { color: #8fa1b8; font-size: .4rem; text-align: right; }
.turn-progress.active { border-left-color: var(--amber); }
.turn-progress.active span, .turn-progress.active strong { color: var(--amber); }

.action-grid { margin-top: 9px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; }
.action-btn {
  min-height: 58px;
  padding: 7px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #29425f;
  border-radius: 3px;
  color: #8ca0b9;
  background: linear-gradient(180deg, #0b1a2a, #07121e);
  cursor: pointer;
}
.action-btn.steady { grid-column: 1 / -1; min-height: 42px; justify-content: center; }
.action-btn b { color: var(--cyan); font: 800 1.1rem var(--font-mono); }
.action-btn span { font: 700 .48rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.action-btn:hover, .action-btn:focus-visible { border-color: var(--cyan); outline: 0; }
.action-btn.active { border-color: var(--amber); color: var(--amber); background: rgba(255,176,32,.08); box-shadow: inset 2px 0 var(--amber), 0 0 12px rgba(255,176,32,.08); }
.action-btn.active b { color: var(--amber); }

.rule-card { margin-top: 12px; padding: 13px; border: 1px solid rgba(255,176,32,.38); background: rgba(255,176,32,.055); }
.rule-card > div { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.rule-card span { color: var(--amber); font: 700 .42rem var(--font-mono); letter-spacing: .08em; }
.rule-card strong { color: #e5edf7; font-size: .88rem; }
.rule-card p { margin: 8px 0 0; color: #91a2b8; font-size: .74rem; line-height: 1.45; }

.scenario-card { margin-top: 14px; padding: 14px; border-left: 3px solid var(--amber); background: rgba(255,176,32,.06); }
.scenario-card span { color: var(--cyan); font: 700 .46rem var(--font-mono); letter-spacing: .08em; }
.scenario-card strong { margin-top: 7px; display: block; color: var(--amber); font: 800 .95rem var(--font-mono); }
.scenario-card p { margin: 8px 0 0; color: #b0bfd0; font-size: .76rem; line-height: 1.5; }
.scope-control { margin-top: 14px; padding: 12px; border: 1px solid var(--border); background: rgba(3,12,21,.58); }
.scope-control small { display: block; margin-top: 8px; color: #71839c; font-size: .66rem; line-height: 1.35; }
.behavior-prediction { margin-top: 14px; padding: 13px; border: 1px solid var(--border); background: rgba(3,12,21,.58); }
.behavior-prediction > p { margin: 0 0 10px; color: #8799b0; font: 700 .52rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.behavior-prediction > p span, .reasoning-prediction > p span { color: var(--cyan); }
.reasoning-prediction { margin-top: 10px; padding: 11px; border: 1px solid var(--border); background: rgba(3,12,21,.58); }
.reasoning-prediction > p { margin: 0 0 8px; color: #8799b0; font: 700 .46rem var(--font-mono); line-height: 1.35; letter-spacing: .035em; text-transform: uppercase; }
.reasoning-choices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; }
.reasoning-choices button { min-height: 38px; padding: 5px; border: 1px solid #29425f; border-radius: 3px; color: #8296af; background: #07131f; font: 700 .39rem var(--font-mono); line-height: 1.25; text-transform: uppercase; cursor: pointer; }
.reasoning-choices button:hover, .reasoning-choices button:focus-visible { color: var(--cyan); border-color: var(--cyan); outline: 0; }
.reasoning-choices button.selected { color: var(--amber); border-color: var(--amber); background: rgba(255,176,32,.08); box-shadow: inset 0 -2px var(--amber); }
.reasoning-choices button:disabled { cursor: default; opacity: .68; }
.reasoning-choices button.selected:disabled { opacity: 1; }
.reasoning-choices button.correct-answer,
.prediction-choice.correct-answer { position: relative; color: var(--green); border-color: var(--green); background: rgba(80,227,154,.1); box-shadow: inset 0 -2px var(--green), 0 0 14px rgba(80,227,154,.12); opacity: 1; }
.reasoning-choices button.incorrect-answer,
.prediction-choice.incorrect-answer { position: relative; color: var(--red); border-color: var(--red); background: rgba(255,83,116,.09); box-shadow: inset 0 -2px var(--red); opacity: 1; }
.prediction-choice.correct-answer b { color: var(--green); }
.prediction-choice.incorrect-answer b { color: var(--red); }
.reasoning-choices button.correct-answer::after,
.prediction-choice.correct-answer::after,
.reasoning-choices button.incorrect-answer::after,
.prediction-choice.incorrect-answer::after { position: absolute; top: 4px; right: 5px; font: 900 .48rem var(--font-mono); }
.reasoning-choices button.correct-answer::after,
.prediction-choice.correct-answer::after { content: "✓"; color: var(--green); }
.reasoning-choices button.incorrect-answer::after,
.prediction-choice.incorrect-answer::after { content: "×"; color: var(--red); }
.prediction-choices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.prediction-choice {
  min-height: 72px;
  padding: 8px 5px;
  display: grid;
  place-items: center;
  gap: 4px;
  border: 1px solid #29425f;
  border-radius: 3px;
  color: #8ca0b9;
  background: linear-gradient(180deg, #0b1a2a, #07121e);
  cursor: pointer;
}
.prediction-choice b { color: var(--cyan); font: 800 1.2rem var(--font-mono); line-height: 1; }
.prediction-choice span { font: 700 .44rem var(--font-mono); letter-spacing: .03em; text-align: center; text-transform: uppercase; }
.prediction-choice:hover, .prediction-choice:focus-visible { border-color: var(--cyan); color: var(--cyan); outline: 0; }
.prediction-choice.selected { border-color: var(--amber); color: var(--amber); background: rgba(255,176,32,.09); box-shadow: inset 0 -2px var(--amber), 0 0 14px rgba(255,176,32,.1); }
.prediction-choice.selected b { color: var(--amber); }
.prediction-choice:disabled { cursor: default; opacity: .68; }
.prediction-choice.selected:disabled { opacity: 1; }
.submit-btn { width: 100%; min-height: 46px; margin-top: 12px; border: 1px solid var(--amber); border-radius: 3px; color: #171000; background: var(--amber); box-shadow: 0 0 18px rgba(255,176,32,.2); font: 800 .57rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; cursor: pointer; }
.submit-btn:disabled { color: #75869c; border-color: #2b4058; background: #0d1a28; box-shadow: none; cursor: default; }
.challenge-guidance { min-height: 34px; margin: 9px 0 0; color: #8ea0b7; font-size: .7rem; line-height: 1.4; }
.challenge-result { margin: 12px 0; padding: 12px; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 4px 11px; align-items: center; border: 1px solid var(--green); background: linear-gradient(135deg, rgba(80,227,154,.14), rgba(3,17,24,.92)); box-shadow: 0 0 22px rgba(80,227,154,.13); }
.challenge-result[hidden] { display: none; }
.challenge-result.incorrect { border-color: var(--red); background: linear-gradient(135deg, rgba(255,83,116,.12), rgba(3,17,24,.92)); box-shadow: 0 0 22px rgba(255,83,116,.1); }
.result-icon { width: 34px; height: 34px; display: grid; place-items: center; grid-row: span 1; border: 1px solid currentColor; border-radius: 50%; color: var(--green); font: 900 1rem var(--font-mono); }
.challenge-result.incorrect .result-icon { color: var(--red); }
.result-copy strong { display: block; color: var(--green); font: 800 .64rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.challenge-result.incorrect .result-copy strong { color: var(--red); }
.result-copy p { margin: 5px 0 0; color: #b5c5d7; font-size: .7rem; line-height: 1.4; }
.challenge-result > button { min-height: 38px; margin-top: 8px; grid-column: 1 / -1; border: 1px solid var(--green); border-radius: 3px; color: #05150f; background: var(--green); font: 800 .48rem var(--font-mono); letter-spacing: .05em; text-transform: uppercase; cursor: pointer; }
.challenge-result.incorrect > button { color: #e9f5ff; border-color: #3b5875; background: #0a1725; }
.challenge-result > button:hover, .challenge-result > button:focus-visible { filter: brightness(1.12); outline: 0; }
@keyframes challenge-success-pulse { 0%, 100% { box-shadow: inset 0 1px rgba(255,255,255,.02), 0 20px 50px rgba(0,0,0,.22); } 45% { border-color: var(--green); box-shadow: 0 0 30px rgba(80,227,154,.35), inset 0 0 24px rgba(80,227,154,.07); } }
@keyframes challenge-review-pulse { 0%, 100% { box-shadow: inset 0 1px rgba(255,255,255,.02), 0 20px 50px rgba(0,0,0,.22); } 45% { border-color: var(--red); box-shadow: 0 0 25px rgba(255,83,116,.24), inset 0 0 20px rgba(255,83,116,.05); } }
.card.challenge-success { animation: challenge-success-pulse .7s ease-out; }
.card.challenge-review { animation: challenge-review-pulse .7s ease-out; }
.challenge-stats { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--border); }
.challenge-stats span { padding: 9px 4px; text-align: center; }
.challenge-stats span + span { border-left: 1px solid var(--border); }
.challenge-stats small, .challenge-stats strong { display: block; font-family: var(--font-mono); }
.challenge-stats small { color: #6f829b; font-size: .4rem; }
.challenge-stats strong { margin-top: 4px; color: var(--cyan); font-size: .72rem; }

#challenge-panel .panel-heading h2 { font-size: 1.4rem; }
#challenge-panel .scope-control { padding: 14px; }
#challenge-panel .scope-control .control-label { font-size: .68rem; }
#challenge-panel .scope-control small { font-size: .8rem; line-height: 1.45; }
#challenge-panel .scenario-card { padding: 17px 18px; }
#challenge-panel .scenario-card span { font-size: .62rem; }
#challenge-panel .scenario-card strong { font-size: 1.12rem; }
#challenge-panel .scenario-card p { font-size: .88rem; line-height: 1.55; }
#challenge-panel .reasoning-prediction,
#challenge-panel .behavior-prediction { padding: 15px; }
#challenge-panel .reasoning-prediction > p,
#challenge-panel .behavior-prediction > p { font-size: .68rem; line-height: 1.45; }
#challenge-panel .reasoning-choices button { min-height: 50px; padding: 8px; font-size: .62rem; }
#challenge-panel .prediction-choice { min-height: 84px; }
#challenge-panel .prediction-choice b { font-size: 1.42rem; }
#challenge-panel .prediction-choice span { font-size: .64rem; }
#challenge-panel .submit-btn { min-height: 50px; font-size: .7rem; }
#challenge-panel .challenge-guidance { font-size: .82rem; }
#challenge-panel .result-copy strong { font-size: .8rem; }
#challenge-panel .result-copy p { font-size: .84rem; line-height: 1.5; }
#challenge-panel .challenge-result > button { min-height: 44px; font-size: .64rem; }
#challenge-panel .challenge-stats small { font-size: .54rem; }
#challenge-panel .challenge-stats strong { font-size: .92rem; }

.lesson-deck { margin-top: 16px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.lesson-card { min-height: 155px; padding: 16px; border: 1px solid var(--border); background: rgba(7,18,31,.86); }
.lesson-card > span { font: 700 .45rem var(--font-mono); letter-spacing: .09em; }
.lesson-card h3 { margin: 9px 0 7px; font: 800 1.18rem var(--font-mono); }
.lesson-card p { margin: 0; color: #91a2b8; font-size: .75rem; line-height: 1.45; }
.lesson-card.amber > span, .lesson-card.amber h3, .lesson-card.amber p strong { color: var(--amber); }
.lesson-card.cyan > span, .lesson-card.cyan h3, .lesson-card.cyan p strong { color: var(--cyan); }
.lesson-card.green > span, .lesson-card.green h3 { color: var(--green); }
.app-footer { margin-top: 16px; padding-top: 16px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--border); color: #637791; font: 500 .5rem var(--font-mono); letter-spacing: .04em; }

@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .lesson-deck { grid-template-columns: 1fr; }
  .control-panel { order: 2; }
}

@media (max-width: 640px) {
  .arcade-nav { min-height: 66px; padding: 0 12px; }
  .arcade-brand { gap: 7px; font-size: .58rem; letter-spacing: .2em; }
  .arcade-brand img { width: 58px; }
  .all-missions { min-height: 34px; padding: 0 9px; font-size: .52rem; }
  .app { padding: 26px 8px 40px; }
  .app-header h1 { font-size: 1.2rem; gap: 7px; letter-spacing: .07em; }
  .subtitle { font-size: .5rem; line-height: 1.5; }
  .trainer-modes { margin-top: 18px; }
  .display-panel, .control-panel { padding: 8px; }
  .panel-heading { min-height: 42px; }
  .panel-heading h2 { font-size: 1rem; }
  .model-badge { font-size: .38rem; }
  #compass-canvas { aspect-ratio: 1.02 / 1; }
  .motion-chip { top: 7px; font-size: .4rem; }
  .compass-journey { padding: 9px; }
  .journey-heading h3 { font-size: .78rem; }
  .journey-logic { grid-template-columns: 1fr; gap: 5px; }
  .journey-logic > b { display: none; }
  .journey-logic article { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 3px 8px; text-align: left; }
  .journey-logic strong { margin-top: 0; text-align: right; }
  .journey-logic em { grid-column: 1 / -1; margin-top: 1px; }
  .display-controls { grid-template-columns: 1fr; }
  .instrument-note { font-size: .66rem; }
  .turn-config { gap: 6px; }
  .turn-progress { align-items: flex-start; flex-direction: column; gap: 3px; }
  .turn-progress strong { text-align: left; }
  .action-btn { min-height: 55px; }
  .trainer-modes { grid-template-columns: repeat(2, 1fr); }
  .mode-btn { min-height: 38px; padding: 3px; font-size: .48rem; letter-spacing: .045em; }
  .lesson-card { min-height: 0; }
  .app-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}