:root {
  --bg: #050b12;
  --panel: rgba(7, 18, 31, 0.82);
  --panel-strong: #091522;
  --border: #263f5e;
  --border-soft: rgba(55, 83, 119, 0.62);
  --text: #eaf1ff;
  --text-dim: #8295b0;
  --amber: #ffb020;
  --cyan: #2ce0ff;
  --green: #50e39a;
  --coral: #ff7584;
  --violet: #b890ff;
  --red: #ff5d67;
  --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 { color: inherit; font: inherit; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.arcade-nav {
  position: relative;
  z-index: 20;
  width: 100%;
  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 {
  display: block;
  width: 78px;
  height: auto;
  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-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.all-missions:hover,
.all-missions:focus-visible {
  color: #161000;
  background: var(--amber);
  box-shadow: 0 0 20px rgba(255, 176, 32, 0.3);
  outline: 0;
}

.app-stage {
  position: relative;
  min-height: calc(100vh - 76px);
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 18%, rgba(31, 139, 174, 0.16), transparent 34%),
    linear-gradient(180deg, rgba(6, 29, 42, 0.66), transparent 43%),
    var(--bg);
}

.app-stage::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.17;
  background-image:
    linear-gradient(rgba(44, 224, 255, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 224, 255, 0.16) 1px, transparent 1px);
  background-size: 72px 72px;
  content: "";
  mask-image: radial-gradient(ellipse 82% 65% at 50% 35%, black 4%, transparent 80%);
}

.app-stage::after {
  position: absolute;
  z-index: -1;
  top: 155px;
  left: 50%;
  width: min(92vw, 1050px);
  height: 520px;
  border: 1px solid rgba(44, 224, 255, 0.08);
  border-radius: 50%;
  content: "";
  transform: translateX(-50%);
}

.app {
  width: min(100%, 1480px);
  margin: 0 auto;
  padding: 34px 24px 58px;
}

.app-header { text-align: center; }

.mission-id,
.panel-kicker {
  margin: 0;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.57rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.app-header h1 {
  max-width: 900px;
  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-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.lab-modes {
  width: fit-content;
  margin: 24px auto 22px;
  display: flex;
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: rgba(5, 14, 24, 0.72);
}

.mode-btn {
  min-height: 40px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  cursor: pointer;
}

.mode-btn.active {
  color: #171000;
  border-color: var(--amber);
  background: linear-gradient(180deg, #ffd06b, var(--amber));
  box-shadow: 0 0 15px rgba(255, 176, 32, 0.3);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(310px, 0.72fr);
  gap: 22px;
  align-items: start;
}

.profile-panel,
.briefing-panel > section {
  border: 1px solid var(--border-soft);
  background: var(--panel);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(8px);
}

.profile-panel { padding: 20px; }

.panel-topline,
.challenge-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.panel-topline h2,
.briefing-panel h2 {
  margin: 4px 0 0;
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
}

.system-chip {
  padding: 8px 10px;
  border: 1px solid rgba(44, 224, 255, 0.48);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
}

.view-controls {
  display: grid;
  justify-items: end;
  gap: 7px;
}

.view-controls[hidden] { display: none; }

.view-switch {
  display: flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  background: rgba(5, 14, 24, 0.76);
}

.view-btn {
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 2px;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.47rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  cursor: pointer;
}

.view-btn:hover,
.view-btn:focus-visible,
.view-btn.active {
  border-color: rgba(255, 176, 32, 0.62);
  background: rgba(255, 176, 32, 0.12);
  color: var(--amber);
  outline: 0;
}

.profile-frame {
  position: relative;
  min-height: 540px;
  margin-top: 16px;
  overflow: hidden;
  border: 1px solid #294563;
  background:
    linear-gradient(180deg, rgba(10, 31, 48, 0.42), rgba(5, 14, 24, 0.96)),
    #06101b;
}

.profile-grid {
  position: absolute;
  inset: 0;
  opacity: 0.54;
  background:
    repeating-linear-gradient(0deg, transparent 0 53px, rgba(75, 111, 143, 0.18) 53px 54px),
    repeating-linear-gradient(90deg, transparent 0 89px, rgba(75, 111, 143, 0.12) 89px 90px);
}

.altitude-scale {
  position: absolute;
  z-index: 7;
  left: 10px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.45rem;
  letter-spacing: 0.08em;
}

.altitude-scale.top { top: 8px; }
.altitude-scale.bottom { bottom: 9px; }

.feature-line {
  position: absolute;
  z-index: 5;
  right: 9%;
  left: 7%;
  height: 2px;
  background: currentColor;
  color: var(--cyan);
  opacity: 0.2;
  transition: opacity 0.2s, box-shadow 0.2s, transform 0.2s;
}

.feature-line span {
  position: absolute;
  top: -13px;
  left: 7px;
  padding: 3px 7px;
  border: 1px solid currentColor;
  background: #06101b;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.06em;
}

.feature-line b { color: currentColor; }
.mea-line { top: 30%; color: var(--cyan); }
.gnss-line { top: 42%; color: var(--violet); border-top: 1px dashed currentColor; background: transparent; }
.moca-line { top: 54%; color: var(--green); }

.profile-frame[data-selected="mea"] .mea-line,
.profile-frame[data-selected="gnss"] .gnss-line,
.profile-frame[data-selected="moca"] .moca-line {
  opacity: 1;
  box-shadow: 0 0 14px currentColor;
  transform: translateY(-1px);
}

.terrain {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 43%;
  pointer-events: none;
}

.terrain > span {
  position: absolute;
  right: -2%;
  bottom: 0;
  left: -2%;
  height: 100%;
}

.terrain-back {
  background: rgba(37, 82, 112, 0.17);
  clip-path: polygon(0 79%, 8% 67%, 17% 75%, 28% 38%, 38% 70%, 49% 52%, 59% 80%, 70% 35%, 79% 69%, 89% 48%, 100% 73%, 100% 100%, 0 100%);
}

.terrain-front {
  background: linear-gradient(180deg, rgba(9, 28, 43, 0.65), rgba(3, 9, 16, 0.96));
  clip-path: polygon(0 89%, 12% 70%, 23% 83%, 34% 56%, 46% 84%, 56% 68%, 68% 87%, 80% 57%, 91% 79%, 100% 68%, 100% 100%, 0 100%);
  filter: drop-shadow(0 -1px 0 rgba(74, 111, 141, 0.6));
}

.obstacle {
  position: absolute;
  z-index: 2;
  bottom: 17%;
  width: 1px;
  height: 28px;
  background: rgba(255, 176, 32, 0.78);
}

.obstacle::before,
.obstacle::after {
  position: absolute;
  left: 50%;
  width: 10px;
  height: 1px;
  background: inherit;
  content: "";
  transform: translateX(-50%);
}

.obstacle::before { top: 7px; }
.obstacle::after { top: 15px; width: 6px; }
.obstacle.one { left: 27%; }
.obstacle.two { right: 17%; bottom: 22%; height: 35px; }

.airway-line {
  position: absolute;
  z-index: 4;
  right: 9%;
  bottom: 17%;
  left: 8%;
  height: 3px;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(255, 176, 32, 0.55);
}

.moca-range {
  position: absolute;
  z-index: 7;
  bottom: 23%;
  width: 21%;
  height: 9px;
  border-top: 2px solid var(--green);
  color: var(--green);
  opacity: 0.04;
  filter: drop-shadow(0 0 6px rgba(80, 227, 154, 0.7));
  transition: opacity 0.2s;
}

.moca-range::before,
.moca-range::after {
  position: absolute;
  top: -6px;
  width: 2px;
  height: 11px;
  background: currentColor;
  content: "";
}

.moca-range::before { left: 0; }
.moca-range::after { right: 0; }
.moca-range-left { left: 8%; }
.moca-range-right { right: 9%; }

.moca-range span {
  position: absolute;
  top: -25px;
  left: 50%;
  width: max-content;
  padding: 3px 5px;
  border: 1px solid rgba(80, 227, 154, 0.5);
  background: #06101b;
  font-family: var(--font-mono);
  font-size: 0.4rem;
  letter-spacing: 0.04em;
  transform: translateX(-50%);
}

.moca-range b { color: #d8ffe9; }

.profile-frame[data-selected="moca"] .moca-range {
  opacity: 1;
}

.profile-frame.challenge-mode .moca-range {
  opacity: 0.03;
}

.navaid {
  position: absolute;
  z-index: 6;
  bottom: 11.5%;
  width: 48px;
  color: var(--amber);
  text-align: center;
}

.navaid.vor-left { left: 6%; }
.navaid.vor-right { right: 7%; }

.navaid i {
  width: 25px;
  height: 25px;
  margin: 0 auto 4px;
  display: block;
  border: 2px solid currentColor;
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(255, 176, 32, 0.35);
}

.navaid i::after {
  width: 7px;
  height: 7px;
  margin: 7px;
  display: block;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.navaid strong {
  font-family: var(--font-mono);
  font-size: 0.48rem;
}

.signal-arc {
  position: absolute;
  z-index: 2;
  bottom: 14%;
  width: 43%;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  opacity: 0.08;
  transition: opacity 0.2s;
}

.signal-arc::before {
  position: absolute;
  inset: 0 0 -100%;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  box-shadow:
    0 0 0 36px rgba(44, 224, 255, 0.035),
    0 0 0 72px rgba(44, 224, 255, 0.025);
  content: "";
}

.signal-left { left: 4%; }
.signal-right { right: 4%; }
.profile-frame[data-selected="mea"] .signal-arc { opacity: 0.62; }

.intersection {
  position: absolute;
  z-index: 6;
  width: 110px;
  color: var(--text-dim);
  text-align: center;
  opacity: 0.25;
  transition: opacity 0.2s, filter 0.2s;
}

.mca-fix {
  top: 30%;
  right: 19%;
  bottom: 17%;
  color: var(--amber);
}

.intersection::after {
  position: absolute;
  z-index: -1;
  top: 27px;
  bottom: 2px;
  left: 50%;
  border-left: 1px dashed currentColor;
  content: "";
  opacity: 0.72;
}

.intersection i {
  position: absolute;
  bottom: -7px;
  left: 50%;
  width: 13px;
  height: 13px;
  display: block;
  border: 2px solid currentColor;
  background: #06101b;
  transform: translateX(-50%) rotate(45deg);
}

.intersection span,
.intersection b {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.45rem;
  line-height: 1.5;
}

.intersection b {
  position: absolute;
  top: -12px;
  right: 0;
  left: 0;
  padding: 3px;
  border: 1px solid currentColor;
  background: #06101b;
}

.intersection span {
  position: absolute;
  right: 0;
  bottom: 13px;
  left: 0;
  color: currentColor;
}

.profile-frame[data-selected="mca"] .mca-fix {
  opacity: 1;
  filter: drop-shadow(0 0 8px currentColor);
}

.mca-climb {
  position: absolute;
  z-index: 3;
  top: 54%;
  left: 55%;
  width: 22%;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--amber) 0 8px, transparent 8px 13px);
  opacity: 0.1;
  transform: rotate(-31deg);
  transform-origin: left center;
}

.mca-climb::after {
  position: absolute;
  top: 50%;
  right: -2px;
  width: 10px;
  height: 10px;
  border-top: 3px solid var(--amber);
  border-right: 3px solid var(--amber);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.mca-climb::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 9px;
  height: 9px;
  border: 2px solid #fff3d5;
  border-radius: 50%;
  background: var(--amber);
  box-shadow:
    0 0 8px var(--amber),
    0 0 17px rgba(255, 176, 32, 0.8);
  content: "";
  opacity: 0;
  transform: translate(-50%, -50%);
}

.mca-climb span {
  position: absolute;
  top: -24px;
  left: 12%;
  width: max-content;
  padding: 3px 6px;
  border: 1px solid rgba(255, 176, 32, 0.55);
  background: #06101b;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.42rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transform: rotate(31deg);
}

.profile-frame[data-selected="mca"] .mca-climb { opacity: 0.92; }
.profile-frame[data-selected="mca"] .mca-climb::before {
  opacity: 1;
  animation: mca-climb-pulse 1.9s ease-in-out infinite;
}

@keyframes mca-climb-pulse {
  0% { left: 0; opacity: 0; }
  16% { opacity: 1; }
  82% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

.oroca-quadrant {
  position: absolute;
  z-index: 4;
  top: 27%;
  right: 2%;
  width: 82px;
  height: 110px;
  padding: 8px;
  border: 1px dashed var(--violet);
  background: rgba(184, 144, 255, 0.04);
  color: var(--violet);
  opacity: 0.2;
  text-align: right;
  transition: opacity 0.2s, box-shadow 0.2s;
}

.oroca-quadrant span,
.oroca-quadrant b {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.4rem;
  letter-spacing: 0.08em;
}

.oroca-quadrant strong {
  display: block;
  margin-top: 11px;
  font-family: var(--font-mono);
  font-size: 1.7rem;
}

.oroca-quadrant strong small {
  position: relative;
  top: -9px;
  font-size: 0.75rem;
}

.profile-frame[data-selected="oroca"] .oroca-quadrant {
  opacity: 1;
  box-shadow: 0 0 18px rgba(184, 144, 255, 0.22);
}

.profile-aircraft {
  position: absolute;
  z-index: 8;
  top: 36%;
  left: 55%;
  width: 76px;
  height: 44px;
  color: #edf4ff;
  filter:
    drop-shadow(0 1px 1px #07111d)
    drop-shadow(0 0 8px rgba(44, 224, 255, 0.72));
  transform: translateY(-50%);
  transition: top 0.38s ease, left 0.38s ease, filter 0.25s ease;
  will-change: top, left;
}

.profile-frame[data-selected="mea"] .profile-aircraft {
  top: 30%;
  left: 49%;
}

.profile-frame[data-selected="gnss"] .profile-aircraft {
  top: 42%;
  left: 49%;
}

.profile-frame[data-selected="moca"] .profile-aircraft {
  top: 54%;
  left: 49%;
}

.profile-frame[data-selected="mra"] .profile-aircraft {
  top: 42%;
  left: 24%;
}

.profile-frame[data-selected="mca"] .profile-aircraft {
  top: 54%;
  left: 46%;
  filter:
    drop-shadow(0 1px 1px #07111d)
    drop-shadow(0 0 10px rgba(255, 176, 32, 0.76));
}

.profile-frame[data-selected="oroca"] .profile-aircraft {
  top: 35%;
  left: 74%;
}

.profile-aircraft-readout {
  position: absolute;
  z-index: 3;
  top: -31px;
  left: 50%;
  min-width: 88px;
  padding: 4px 7px;
  border: 1px solid rgba(44, 224, 255, 0.5);
  background: rgba(6, 16, 27, 0.94);
  color: var(--cyan);
  font-family: var(--font-mono);
  line-height: 1.15;
  text-align: center;
  white-space: nowrap;
  box-shadow: 0 0 12px rgba(44, 224, 255, 0.15);
  transform: translateX(-50%);
  transition: opacity 0.2s, border-color 0.2s, color 0.2s;
}

.profile-aircraft-readout strong,
.profile-aircraft-readout span { display: block; }
.profile-aircraft-readout strong { font-size: 0.5rem; }
.profile-aircraft-readout span {
  margin-top: 2px;
  color: var(--text-dim);
  font-size: 0.34rem;
  letter-spacing: 0.05em;
}

.profile-frame[data-selected="mca"] .profile-aircraft-readout {
  border-color: rgba(255, 176, 32, 0.75);
  color: var(--amber);
  box-shadow: 0 0 14px rgba(255, 176, 32, 0.2);
}

.profile-frame[data-selected="oroca"] .profile-aircraft-readout {
  border-color: rgba(184, 144, 255, 0.7);
  color: var(--violet);
}

.profile-frame.challenge-mode .profile-aircraft-readout {
  opacity: 0;
}

.profile-aircraft::before {
  position: absolute;
  inset: 0;
  display: block;
  background: currentColor;
  clip-path: polygon(
    100% 50%,
    88% 43%,
    65% 42%,
    42% 15%,
    34% 18%,
    52% 46%,
    22% 46%,
    10% 36%,
    4% 39%,
    13% 50%,
    4% 61%,
    10% 64%,
    22% 54%,
    55% 55%,
    28% 88%,
    39% 91%,
    70% 54%,
    88% 53%
  );
  content: "";
}

.chart-frame {
  --chart-ink: #17212c;
  --chart-paper: #e8e5dc;
  --chart-blue: #335d9f;
  --chart-brown: #a88f67;
  position: relative;
  min-height: 540px;
  margin-top: 16px;
  overflow: hidden;
  border: 1px solid #294563;
  background:
    radial-gradient(circle at 52% 48%, rgba(255, 255, 255, 0.82), transparent 48%),
    linear-gradient(145deg, #f2f0e9, var(--chart-paper));
  color: var(--chart-ink);
  isolation: isolate;
}

.chart-frame::after {
  position: absolute;
  inset: 0;
  z-index: 12;
  border: 8px solid rgba(7, 18, 31, 0.06);
  pointer-events: none;
  content: "";
}

.chart-paper-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.48;
  background:
    repeating-linear-gradient(0deg, transparent 0 53px, rgba(65, 93, 123, 0.1) 53px 54px),
    repeating-linear-gradient(90deg, transparent 0 89px, rgba(65, 93, 123, 0.08) 89px 90px);
}

.chart-section-label,
.chart-disclaimer {
  position: absolute;
  z-index: 5;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 0.42rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.chart-section-label { left: 14px; color: var(--chart-blue); }
.chart-disclaimer { right: 14px; color: #a43c3c; }

.chart-boundary {
  position: absolute;
  z-index: 0;
  width: 1px;
  height: 125%;
  border-left: 2px dashed rgba(51, 93, 159, 0.25);
  transform-origin: center;
}

.boundary-one { top: -14%; left: 28%; transform: rotate(17deg); }
.boundary-two { top: -9%; right: 17%; transform: rotate(-12deg); }

.chart-segment {
  position: absolute;
  z-index: 2;
  height: 5px;
  background: var(--chart-ink);
  transform-origin: left center;
  pointer-events: none;
}

.rnav-segment {
  height: 4px;
  background: var(--chart-blue);
}

.chart-route-id {
  position: absolute;
  z-index: 5;
  padding: 2px 6px;
  background: var(--chart-ink);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.chart-rnav-id {
  position: absolute;
  z-index: 5;
  padding: 2px 6px;
  background: var(--chart-blue);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

[data-route-label] { transform-origin: center; }

.chart-vor {
  position: absolute;
  z-index: 5;
  width: 78px;
  color: var(--chart-blue);
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

.chart-vor-west { top: calc(58% - 18px); left: 8%; transform: translateX(-50%); }
.chart-vor-east { top: calc(38% - 18px); left: 93%; transform: translateX(-50%); }

.chart-vor i {
  position: relative;
  width: 25px;
  height: 25px;
  margin: 0 auto 5px;
  display: block;
  border: 3px solid currentColor;
  background: var(--chart-paper);
  transform: rotate(45deg);
}

.chart-vor i::after {
  position: absolute;
  inset: 6px;
  border: 2px solid currentColor;
  border-radius: 50%;
  content: "";
}

.chart-vor strong,
.chart-vor span {
  display: block;
  font-size: 0.48rem;
  line-height: 1.3;
}

.chart-fix {
  position: absolute;
  z-index: 6;
  width: 72px;
  color: var(--chart-ink);
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

.chart-fix-cedar { top: calc(51% - 17px); left: 30%; transform: translateX(-50%); }
.chart-fix-climb { top: calc(44% - 17px); left: 74%; transform: translateX(-50%); }
.chart-fix-merit { top: calc(56% - 17px); left: 60%; transform: translateX(-50%); }
.chart-fix-north { top: calc(15% - 17px); left: 50%; transform: translateX(-50%); }
.chart-fix-south { top: calc(76% - 17px); left: 65%; transform: translateX(-50%); }
.chart-fix-nova { top: calc(24% - 17px); left: 11%; transform: translateX(-50%); }
.rnav-fix { color: var(--chart-blue); }
.rnav-fix i { border-bottom-color: currentColor; }

.chart-fix i {
  position: relative;
  z-index: 2;
  width: 0;
  height: 0;
  margin: 0 auto 3px;
  display: block;
  border-right: 10px solid transparent;
  border-bottom: 17px solid currentColor;
  border-left: 10px solid transparent;
}

.chart-fix i::after {
  position: absolute;
  z-index: 1;
  width: 0;
  height: 0;
  border-right: 6px solid transparent;
  border-bottom: 11px solid var(--chart-paper);
  border-left: 6px solid transparent;
  content: "";
  transform: translate(-6px, 4px);
}

.chart-fix.compulsory i::after { display: none; }

.chart-fix strong {
  position: absolute;
  z-index: 8;
  padding: 1px 3px;
  display: block;
  background: rgba(232, 229, 220, 0.94);
  font-size: 0.5rem;
  line-height: 1;
  white-space: nowrap;
}

.chart-fix-cedar strong {
  top: -4px;
  left: calc(50% + 13px);
  transform: translateY(-100%);
}

.chart-fix-climb strong,
.chart-fix-merit strong,
.chart-fix-north strong,
.chart-fix-south strong {
  top: 2px;
  left: calc(50% + 14px);
}

.chart-fix-climb strong {
  right: calc(50% + 14px);
  left: auto;
}

.chart-fix-nova strong {
  top: -4px;
  right: calc(50% + 13px);
  transform: translateY(-100%);
}

.chart-cop {
  position: absolute;
  z-index: 8;
  width: 42px;
  height: 68px;
  color: var(--chart-ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.58rem;
  font-weight: 700;
  text-align: center;
}

.chart-cop b {
  position: absolute;
  left: 50%;
  min-width: 24px;
  padding: 1px 3px;
  background: rgba(232, 229, 220, 0.96);
  transform: translateX(-50%);
}

.chart-cop b:first-child { top: 0; }
.chart-cop b:nth-of-type(2) { bottom: 0; }

.chart-cop b:first-child { left: calc(50% + 10px); }
.chart-cop b:nth-of-type(2) { left: calc(50% - 10px); }

.chart-cop i {
  position: absolute;
  top: 17px;
  left: 50%;
  width: 3px;
  height: 34px;
  background: var(--chart-ink);
  transform: translateX(-50%);
}

.chart-cop i::before,
.chart-cop i::after {
  position: absolute;
  width: 17px;
  height: 3px;
  background: var(--chart-ink);
  content: "";
}

.chart-cop i::before { top: 0; left: 0; }
.chart-cop i::after { right: 0; bottom: 0; }

.chart-cop small {
  position: absolute;
  bottom: -11px;
  left: 50%;
  padding: 1px 2px;
  background: rgba(232, 229, 220, 0.92);
  font-size: 0.38rem;
  letter-spacing: 0.05em;
  transform: translateX(-50%);
}

.chart-dme-next {
  position: absolute;
  z-index: 8;
  top: 43%;
  left: 72%;
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 3px;
  color: var(--chart-ink);
  font-family: Arial, Helvetica, sans-serif;
  transform: rotate(-11deg);
}

.chart-dme-next span {
  min-width: 31px;
  padding: 3px 7px;
  border: 2px solid var(--chart-ink);
  border-radius: 3px 11px 11px 3px;
  background: var(--chart-paper);
  font-size: 0.67rem;
  font-weight: 700;
  text-align: center;
}

.chart-dme-next i {
  font-size: 0.8rem;
  font-style: normal;
  font-weight: 700;
}

.chart-dme-next small {
  grid-column: 1 / -1;
  color: #555c63;
  font-size: 0.38rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.chart-segment-mileage {
  position: absolute;
  z-index: 6;
  padding: 2px 4px;
  background: rgba(232, 229, 220, 0.94);
  color: var(--chart-ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.64rem;
  font-weight: 700;
}

.chart-altitude-stack {
  position: absolute;
  z-index: 7;
  top: 46%;
  left: 49%;
  display: grid;
  justify-items: start;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  line-height: 1;
  transform: rotate(-9deg);
}

.chart-mea,
.chart-moca,
.chart-mra,
.chart-mca,
.chart-cop,
.chart-dme-next,
.chart-segment-mileage,
.chart-route-id,
.chart-rnav-id,
.chart-fix[data-chart-feature],
.chart-oroca,
.chart-gnss-note {
  transition: color 0.2s, filter 0.2s, outline-color 0.2s, background 0.2s;
}

.chart-mea,
.chart-moca {
  padding: 3px 5px;
  font-size: 0.85rem;
}

.chart-mra {
  position: relative;
  z-index: 7;
  width: max-content;
  margin: 3px auto 0;
  display: block;
  font-size: 0.54rem;
  font-weight: 700;
  white-space: nowrap;
}

.chart-mra b {
  display: block;
  padding: 2px 4px;
  background: rgba(232, 229, 220, 0.88);
}

.chart-mra em {
  position: absolute;
  z-index: 2;
  top: -56px;
  left: 50%;
  min-width: 19px;
  padding: 2px 4px;
  border: 2px solid var(--chart-ink);
  background: rgba(232, 229, 220, 0.98);
  color: inherit;
  font-size: 0.72rem;
  font-style: normal;
  line-height: 1;
  text-align: center;
  transform: translateX(-50%) rotate(10deg);
}

.chart-mra em::after {
  position: absolute;
  z-index: -1;
  top: calc(100% - 1px);
  left: 50%;
  width: 2px;
  height: 28px;
  background: var(--chart-ink);
  content: "";
  transform: translateX(-50%) rotate(-10deg);
  transform-origin: top;
}

.chart-mca {
  position: absolute;
  z-index: 7;
  top: -62px;
  right: 38px;
  left: auto;
  display: grid;
  border: 2px solid var(--chart-ink);
  background: rgba(232, 229, 220, 0.96);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.58rem;
  line-height: 1.1;
  text-align: center;
}

.chart-mca span,
.chart-mca b { padding: 3px 6px; }
.chart-mca span { border-bottom: 1px solid var(--chart-ink); }

.chart-mca em {
  position: absolute;
  z-index: 2;
  top: -2px;
  right: -27px;
  left: auto;
  min-width: 20px;
  padding: 2px 5px;
  border: 2px solid var(--chart-ink);
  background: rgba(232, 229, 220, 0.98);
  color: inherit;
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 700;
  line-height: 1;
  transform: rotate(9deg);
}

.chart-mca em::after {
  position: absolute;
  z-index: -1;
  top: calc(100% - 1px);
  left: 50%;
  width: 2px;
  height: 60px;
  background: var(--chart-ink);
  content: "";
  transform: translateX(-50%) rotate(8deg);
  transform-origin: top;
}

.chart-oroca {
  position: absolute;
  z-index: 1;
  top: 10%;
  right: 7%;
  color: var(--chart-brown);
  font-family: Arial, Helvetica, sans-serif;
}

.chart-oroca strong {
  font-size: clamp(3rem, 7vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -0.09em;
}

.chart-oroca small {
  position: relative;
  top: -1.45em;
  margin-left: 4px;
  font-size: 0.38em;
}

.chart-gnss-note {
  position: absolute;
  z-index: 5;
  top: 30.2%;
  left: 31%;
  display: grid;
  gap: 3px;
  color: var(--chart-blue);
  font-family: Arial, Helvetica, sans-serif;
  transform: rotate(13deg);
}

.chart-gnss-note span { font-size: 0.8rem; font-weight: 700; }
.chart-gnss-note small { font-size: 0.42rem; font-weight: 700; }

.chart-key {
  position: absolute;
  z-index: 8;
  right: 14px;
  bottom: 12px;
  left: 14px;
  min-height: 60px;
  padding: 8px 10px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, auto));
  align-items: center;
  justify-content: center;
  justify-items: start;
  gap: clamp(12px, 4vw, 38px);
  border: 1px solid rgba(23, 33, 44, 0.32);
  background: rgba(242, 240, 233, 0.94);
  color: #49515a;
  font-family: var(--font-mono);
  font-size: 0.46rem;
  letter-spacing: 0.04em;
}

.chart-key b { color: var(--chart-ink); }
.chart-key .key-gnss,
.chart-key .key-gnss b { color: var(--chart-blue); }

.key-cop,
.key-dme,
.key-report {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.key-cop-symbol {
  position: relative;
  width: 25px;
  height: 31px;
  display: inline-block;
  color: var(--chart-ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.32rem;
  font-weight: 700;
}

.key-cop-symbol b {
  position: absolute;
  padding: 0 2px;
  background: var(--chart-paper);
  line-height: 1;
}

.key-cop-symbol b:first-child { top: 0; right: 0; }
.key-cop-symbol b:last-child { bottom: 0; left: 0; }

.key-cop-symbol i {
  position: absolute;
  top: 7px;
  left: 11px;
  width: 3px;
  height: 17px;
  display: block;
  background: var(--chart-ink);
}

.key-cop-symbol i::before,
.key-cop-symbol i::after {
  position: absolute;
  width: 9px;
  height: 3px;
  background: var(--chart-ink);
  content: "";
}

.key-cop-symbol i::before { top: 0; left: 0; }
.key-cop-symbol i::after { right: 0; bottom: 0; }

.key-dme b {
  min-width: 25px;
  padding: 2px 6px;
  border: 1px solid var(--chart-ink);
  border-radius: 2px 9px 9px 2px;
  background: var(--chart-paper);
  text-align: center;
}

.key-dme i { color: var(--chart-ink); font-style: normal; font-size: 0.65rem; }

.key-report i {
  width: 0;
  height: 0;
  display: inline-block;
  border-right: 5px solid transparent;
  border-bottom: 9px solid var(--chart-ink);
  border-left: 5px solid transparent;
}

.noncompulsory-key i {
  position: relative;
}

.noncompulsory-key i::after {
  position: absolute;
  top: 3px;
  left: -3px;
  width: 0;
  height: 0;
  border-right: 3px solid transparent;
  border-bottom: 5px solid var(--chart-paper);
  border-left: 3px solid transparent;
  content: "";
}

.chart-frame[data-selected="mea"] .chart-mea,
.chart-frame[data-selected="moca"] .chart-moca,
.chart-frame[data-selected="mra"] .chart-mra,
.chart-frame[data-selected="mca"] .chart-mca,
.chart-frame[data-selected="cop"] .chart-cop,
.chart-frame[data-selected="oroca"] .chart-oroca,
.chart-frame[data-selected="gnss"] .chart-gnss-note,
.chart-frame[data-selected="dme"] .chart-dme-next,
.chart-frame[data-selected="compulsory"] .chart-fix-north,
.chart-frame[data-selected="noncompulsory"] .chart-fix-south,
.chart-frame[data-selected="victor"] .route-id-north,
.chart-frame[data-selected="rnav"] .chart-rnav-id,
.chart-frame[data-selected="mileage"] .chart-segment-mileage,
.chart-frame[data-answer="mea"] .chart-mea,
.chart-frame[data-answer="moca"] .chart-moca,
.chart-frame[data-answer="mra"] .chart-mra,
.chart-frame[data-answer="mca"] .chart-mca,
.chart-frame[data-answer="cop"] .chart-cop,
.chart-frame[data-answer="oroca"] .chart-oroca,
.chart-frame[data-answer="dme"] .chart-dme-next,
.chart-frame[data-answer="compulsory"] .chart-fix-north,
.chart-frame[data-answer="noncompulsory"] .chart-fix-south,
.chart-frame[data-answer="victor"] .route-id-north,
.chart-frame[data-answer="rnav"] .chart-rnav-id,
.chart-frame[data-answer="mileage"] .chart-segment-mileage,
.chart-frame[data-answer="gnss"] .chart-gnss-note {
  color: #a94a00;
  filter: drop-shadow(0 0 7px rgba(255, 176, 32, 0.8));
  outline: 2px solid rgba(255, 176, 32, 0.78);
  outline-offset: 2px;
  background: rgba(255, 226, 154, 0.72);
}

.chart-frame[data-selected="gnss"] .chart-gnss-note,
.chart-frame[data-answer="gnss"] .chart-gnss-note {
  color: var(--chart-blue);
}

.chart-frame[data-selected="victor"] .route-id-north,
.chart-frame[data-answer="victor"] .route-id-north {
  background: var(--chart-ink);
  color: #fff;
}

.chart-frame[data-selected="rnav"] .chart-rnav-id,
.chart-frame[data-answer="rnav"] .chart-rnav-id {
  background: var(--chart-blue);
  color: #fff;
}

.chart-frame[data-selected="oroca"] .chart-oroca,
.chart-frame[data-answer="oroca"] .chart-oroca {
  color: var(--chart-brown);
}

.chart-frame.challenge-mode [data-chart-feature] {
  color: var(--chart-ink);
  filter: none;
  outline-color: transparent;
  background: transparent;
}

.chart-frame.challenge-mode .chart-gnss-note { color: var(--chart-blue); }
.chart-frame.challenge-mode .chart-route-id { color: #fff; background: var(--chart-ink); }
.chart-frame.challenge-mode .chart-rnav-id { color: #fff; background: var(--chart-blue); }
.chart-frame.challenge-mode .chart-oroca { color: var(--chart-brown); }

.chart-target {
  position: absolute;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  cursor: crosshair;
}

.chart-target::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 11px;
  border: 1px solid rgba(168, 79, 0, 0.7);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  content: "";
  transform: translate(-50%, -50%);
}

.chart-target:hover,
.chart-target:focus-visible {
  border-color: rgba(168, 79, 0, 0.75);
  background: rgba(255, 176, 32, 0.14);
  outline: 0;
}

.chart-target-mea { top: 42%; left: 42%; width: 12%; height: 8%; }
.chart-target-moca { top: 48%; left: 42%; width: 12%; height: 8%; }
.chart-target-mra { top: 48%; left: 23%; width: 16%; height: 17%; }
.chart-target-mca { top: 23%; left: 65%; width: 19%; height: 22%; }
.chart-target-oroca { top: 7%; right: 3%; width: 19%; height: 25%; }
.chart-target-gnss { top: 22%; left: 16%; width: 20%; height: 12%; }
.chart-target-cop { top: 45%; left: 14%; width: 13%; height: 22%; }
.chart-target-dme { top: 39%; left: 74%; width: 16%; height: 16%; }
.chart-target-dme::after { top: 85%; }
.chart-target-compulsory { top: 7%; left: 44%; width: 13%; height: 18%; }
.chart-target-noncompulsory { top: 68%; left: 59%; width: 13%; height: 17%; }
.chart-target-victor { top: 23%; left: 48%; width: 13%; height: 15%; }
.chart-target-rnav { top: 26%; left: 10%; width: 13%; height: 12%; }
.chart-target-mileage { top: 37%; left: 52%; width: 12%; height: 13%; }

.concept-deck {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.concept-deck:not(.chart-view) .chart-only-card { display: none; }
.concept-deck.chart-view { grid-template-columns: repeat(6, 1fr); }

.concept-card {
  min-height: 66px;
  padding: 9px 7px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #091522;
  color: var(--text-dim);
  text-align: left;
  cursor: pointer;
}

.concept-card strong,
.concept-card span { display: block; }

.concept-card strong {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.73rem;
}

.concept-card span {
  margin-top: 6px;
  font-size: 0.65rem;
  line-height: 1.15;
}

.concept-card:hover,
.concept-card:focus-visible,
.concept-card.active {
  border-color: var(--amber);
  background: rgba(255, 176, 32, 0.09);
  box-shadow: 0 0 14px rgba(255, 176, 32, 0.12);
  outline: 0;
}

.concept-card.active strong { color: var(--amber); }
.concept-deck.challenge-mode { display: none; }

.briefing-panel {
  display: grid;
  gap: 14px;
}

.briefing-panel > section { padding: 20px; }

.briefing-code {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.briefing-code span {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  text-shadow: 0 0 16px rgba(255, 176, 32, 0.28);
}

.briefing-code small {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  letter-spacing: 0.1em;
}

.definition {
  min-height: 104px;
  color: #a8b8cd;
  font-size: 0.92rem;
  line-height: 1.58;
}

.protection-grid {
  display: grid;
  gap: 10px;
}

.protection-grid div,
.contrast-callout {
  padding: 12px;
  border: 1px solid #233b57;
  background: #07111d;
}

.protection-grid small,
.contrast-callout small {
  display: block;
  margin-bottom: 6px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.46rem;
  letter-spacing: 0.1em;
}

.protection-grid strong {
  font-size: 0.8rem;
  line-height: 1.4;
}

.contrast-callout {
  margin-top: 10px;
  border-left-color: var(--amber);
}

.contrast-callout small { color: var(--amber); }
.contrast-callout p { margin: 0; color: var(--text-dim); font-size: 0.77rem; line-height: 1.45; }

.memory-panel .panel-kicker { margin-bottom: 12px; }

.memory-row {
  min-height: 36px;
  display: grid;
  grid-template-columns: 86px 1fr;
  align-items: center;
  border-top: 1px solid rgba(38, 63, 94, 0.65);
}

.memory-row b {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  letter-spacing: 0.08em;
}

.memory-row span {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.challenge-topline button {
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--amber);
  background: rgba(255, 176, 32, 0.08);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  font-weight: 700;
  cursor: pointer;
}

.challenge-stats {
  margin: 18px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
}

.challenge-stats span {
  padding: 11px 5px;
  border-right: 1px solid var(--border);
  text-align: center;
}

.challenge-stats span:last-child { border: 0; }
.challenge-stats small,
.challenge-stats strong { display: block; font-family: var(--font-mono); }
.challenge-stats small { color: var(--text-dim); font-size: 0.4rem; letter-spacing: 0.09em; }
.challenge-stats strong { margin-top: 5px; color: var(--cyan); font-size: 0.95rem; }

.applied-clues-toggle {
  min-height: 50px;
  margin: -7px 0 14px;
  padding: 9px 11px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  background: rgba(8, 20, 33, 0.74);
  cursor: pointer;
}

.applied-clues-toggle span,
.applied-clues-toggle strong,
.applied-clues-toggle small { display: block; }

.applied-clues-toggle strong {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
}

.applied-clues-toggle small {
  margin-top: 4px;
  color: var(--text-dim);
  font-size: 0.58rem;
  line-height: 1.25;
}

.applied-clues-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.applied-clues-toggle i {
  position: relative;
  width: 38px;
  height: 21px;
  border: 1px solid #41536c;
  border-radius: 999px;
  background: #13243a;
}

.applied-clues-toggle i::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #71839b;
  content: "";
  transition: transform 0.18s, background 0.18s, box-shadow 0.18s;
}

.applied-clues-toggle input:checked + i {
  border-color: var(--amber);
  background: rgba(255, 176, 32, 0.13);
}

.applied-clues-toggle input:checked + i::after {
  background: var(--amber);
  box-shadow: 0 0 10px rgba(255, 176, 32, 0.45);
  transform: translateX(17px);
}

.applied-clues-toggle input:focus-visible + i {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.challenge-prompt {
  padding: 17px;
  border: 1px solid rgba(255, 176, 32, 0.45);
  background: rgba(255, 176, 32, 0.06);
}

.challenge-prompt > span {
  display: block;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: clamp(1rem, 4vw, 1.65rem);
  font-weight: 700;
  line-height: 1.15;
  overflow-wrap: anywhere;
}

.challenge-prompt p {
  margin: 10px 0 0;
  color: #b7c4d5;
  font-size: 0.83rem;
  line-height: 1.5;
}

.challenge-instruction {
  color: var(--text-dim);
  font-size: 0.72rem;
  line-height: 1.45;
}

.challenge-feedback {
  min-height: 68px;
  padding: 12px;
  border: 1px solid var(--border);
  background: #07111d;
}

.challenge-feedback strong,
.challenge-feedback span { display: block; }
.challenge-feedback strong { color: var(--cyan); font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.08em; }
.challenge-feedback span { margin-top: 7px; color: var(--text-dim); font-size: 0.7rem; line-height: 1.4; }
.challenge-feedback.correct { border-color: rgba(80, 227, 154, 0.55); }
.challenge-feedback.correct strong { color: var(--green); }
.challenge-feedback.wrong { border-color: rgba(255, 93, 103, 0.55); }
.challenge-feedback.wrong strong { color: var(--red); }

.profile-frame.challenge-mode [data-feature] { opacity: 0.13; box-shadow: none; filter: none; }
.profile-frame.challenge-mode .signal-arc { opacity: 0.05; }
.profile-frame.challenge-mode .moca-range { opacity: 0.03; }

.challenge-overlay {
  position: absolute;
  inset: 0;
  z-index: 15;
}

.feature-target {
  position: absolute;
  border: 1px solid transparent;
  border-radius: 5px;
  background: rgba(44, 224, 255, 0.015);
  cursor: crosshair;
}

.feature-target::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 11px;
  border: 1px solid rgba(44, 224, 255, 0.55);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(44, 224, 255, 0.22);
  content: "";
  transform: translate(-50%, -50%);
}

.feature-target:hover,
.feature-target:focus-visible {
  border-color: rgba(44, 224, 255, 0.7);
  background: rgba(44, 224, 255, 0.08);
  outline: 0;
}

.target-mea { top: 24%; right: 10%; left: 8%; height: 12%; }
.target-gnss { top: 36%; right: 10%; left: 8%; height: 12%; }
.target-moca { top: 48%; right: 10%; left: 8%; height: 12%; }
.target-mca { top: 24%; right: 15%; width: 22%; height: 14%; }
.target-oroca { top: 24%; right: 1%; width: 12%; height: 25%; }

.profile-frame[data-answer="mea"] .mea-line,
.profile-frame[data-answer="gnss"] .gnss-line,
.profile-frame[data-answer="moca"] .moca-line,
.profile-frame[data-answer="mca"] .mca-fix,
.profile-frame[data-answer="oroca"] .oroca-quadrant {
  opacity: 1;
  filter: drop-shadow(0 0 8px currentColor);
}

.answer-bubble {
  position: absolute;
  z-index: 30;
  min-width: 128px;
  padding: 9px 12px;
  border: 1px solid;
  background: #07111d;
  text-align: center;
  transform: translate(-50%, -100%);
  pointer-events: none;
}

.answer-bubble strong,
.answer-bubble span { display: block; font-family: var(--font-mono); }
.answer-bubble strong { font-size: 0.55rem; letter-spacing: 0.08em; }
.answer-bubble span { margin-top: 4px; color: var(--text-dim); font-size: 0.47rem; }
.answer-bubble.correct { color: var(--green); box-shadow: 0 0 20px rgba(80, 227, 154, 0.25); }
.answer-bubble.wrong { color: var(--red); box-shadow: 0 0 20px rgba(255, 93, 103, 0.2); }

.app-footer {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: #60748e;
  font-family: var(--font-mono);
  font-size: 0.48rem;
  letter-spacing: 0.05em;
}

@media (max-width: 1040px) {
  .workspace { grid-template-columns: 1fr; }
  .briefing-panel { grid-template-columns: 1.2fr 0.8fr; }
  .briefing-panel > section:first-child { grid-row: span 2; }
  .definition { min-height: 0; }
  .concept-deck.chart-view { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 720px) {
  .arcade-nav { min-height: 68px; padding: 0 14px; }
  .arcade-brand { gap: 8px; font-size: 0.58rem; letter-spacing: 0.2em; }
  .arcade-brand img { width: 58px; }
  .all-missions { padding: 0 9px; font-size: 0.52rem; }
  .app { padding: 25px 9px 40px; }
  .app-header h1 { gap: 7px; font-size: 1.18rem; }
  .brand-hair { max-width: 24px; }
  .lab-modes { width: 100%; }
  .mode-btn { flex: 1; padding: 0 5px; font-size: 0.5rem; }
  .profile-panel { padding: 12px; }
  .panel-topline { align-items: flex-start; }
  .view-controls { min-width: 132px; }
  .view-btn { padding: 0 7px; font-size: 0.42rem; }
  .system-chip { padding: 6px; font-size: 0.4rem; text-align: center; }
  .profile-frame,
  .chart-frame { min-height: 430px; }
  .concept-deck,
  .concept-deck.chart-view { grid-template-columns: repeat(2, 1fr); }
  .concept-card { min-height: 56px; }
  .briefing-panel { grid-template-columns: 1fr; }
  .briefing-panel > section:first-child { grid-row: auto; }
  .workspace.challenge-mode .briefing-panel { display: contents; }
  .workspace.challenge-mode .challenge-briefing { order: -1; }
  .workspace.challenge-mode .challenge-feedback { display: none; }
  .oroca-quadrant { width: 65px; height: 90px; }
  .oroca-quadrant strong { font-size: 1.25rem; }
  .intersection { width: 82px; }
  .mca-fix { right: 16%; }
  .feature-line { right: 8%; left: 8%; }
  .feature-line span { font-size: 0.46rem; }
  .profile-aircraft { left: 46%; transform: translateY(-50%) scale(0.84); transform-origin: center; }
  .chart-oroca strong { font-size: 3.1rem; }
  .chart-mca { right: 30px; left: auto; }
  .chart-altitude-stack { left: 47%; }
  .chart-key { gap: 7px 12px; font-size: 0.36rem; }
  .app-footer { flex-direction: column; line-height: 1.5; }
}

@media (max-width: 430px) {
  .panel-topline { display: grid; grid-template-columns: 1fr; }
  .view-controls { width: 100%; grid-template-columns: auto 1fr; align-items: center; justify-items: start; }
  .system-chip { max-width: none; justify-self: end; }
  .profile-frame { min-height: 430px; }
  .chart-frame { min-height: 560px; }
  .intersection b { font-size: 0.4rem; }
  .mca-fix { right: 12%; }
  .navaid.vor-left { left: 3%; }
  .navaid.vor-right { right: 3%; }
  .target-oroca { width: 18%; }
  .chart-section-label { max-width: 150px; }
  .chart-vor { width: 60px; }
  .chart-vor strong,
  .chart-vor span { font-size: 0.4rem; }
  .chart-fix { width: 55px; }
  .chart-fix strong { font-size: 0.4rem; }
  .chart-route-id,
  .chart-rnav-id { font-size: 0.5rem; }
  .chart-mea,
  .chart-moca { font-size: 0.66rem; }
  .chart-gnss-note span { font-size: 0.65rem; }
  .chart-gnss-note small { display: none; }
  .chart-mra { font-size: 0.5rem; }
  .chart-mca { font-size: 0.49rem; }
  .chart-mca { top: -51px; right: 27px; left: auto; }
  .route-id-west,
  .route-id-east { display: none; }
  .route-id-middle { left: 45%; transform: rotate(-9deg) scale(0.82); }
  .chart-rnav-id { left: 14%; transform: rotate(13deg) scale(0.82); }
  .chart-gnss-note { left: 31%; transform: rotate(13deg) scale(0.82); transform-origin: left center; }
  .chart-cop { left: 12%; transform: rotate(-12deg) scale(0.76); transform-origin: center; }
  .chart-dme-next { top: 49%; left: 72%; transform: rotate(-11deg) scale(0.72); transform-origin: left center; }
  .chart-key {
    right: 7px;
    bottom: 7px;
    left: 7px;
    min-height: 86px;
    padding: 6px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    justify-content: space-between;
    gap: 5px 8px;
    font-size: 0.34rem;
  }
  .memory-row { grid-template-columns: 78px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}