:root {
  color-scheme: dark;
  --cc-bg: #0d1b2a;
  --cc-bg-deep: #081521;
  --cc-card: #17293c;
  --cc-card-border: rgba(163, 206, 241, 0.11);
  --cc-active: #274c77;
  --cc-active-border: #6096ba;
  --cc-glass-bg: rgba(163, 206, 241, 0.07);
  --cc-glass-border: rgba(163, 206, 241, 0.22);
  --cc-accent: #a3cef1;
  --cc-text: #eaf2fb;
  --cc-text-dim: #93a8bd;
  --cc-you: #5ec8f8;
  --cc-traffic: #ffb020;
  --cc-correct: #2fd08a;
  --cc-incorrect: #ff5d6c;
  --cc-radius-card: 18px;
  --cc-radius-btn: 11px;
  --cc-font: -apple-system, "system-ui", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background: radial-gradient(120% 140% at 50% -10%, #142c42 0%, var(--cc-bg) 45%, var(--cc-bg-deep) 100%);
  color: var(--cc-text);
  font-family: var(--cc-font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px) 64px;
}

/* ---------- Header ---------- */
.cc-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--cc-card-border);
  margin-bottom: 28px;
}

.cc-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  max-width: calc(50% - 60px);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  font: inherit;
  text-align: left;
}

.cc-app-icon {
  display: flex;
  flex-shrink: 0;
}

.cc-app-name {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  flex: 1 1 auto;
  line-height: 1.2;
}

.cc-app-name-primary,
.cc-app-name-secondary {
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cc-app-name-primary {
  font-weight: 700;
  font-size: clamp(0.85rem, 2.2vw, 1rem);
}

.cc-app-name-secondary {
  font-weight: 500;
  font-size: clamp(0.7rem, 1.8vw, 0.8rem);
  color: var(--cc-text-dim);
}

.cc-header-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  flex-shrink: 0;
}

.cc-badge-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
}

.cc-badge-logo {
  height: 44px;
  width: auto;
  display: block;
}

.cc-pill-btn {
  height: 34px;
  padding: 0 16px;
  border-radius: var(--cc-radius-btn);
  border: 1px solid var(--cc-glass-border);
  background: var(--cc-glass-bg);
  color: var(--cc-text);
  font-family: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}

.cc-pill-btn:hover {
  background: rgba(163, 206, 241, 0.13);
}

/* ---------- Layout primitives ---------- */
.card {
  background: var(--cc-card);
  border: 1px solid var(--cc-card-border);
  border-radius: var(--cc-radius-card);
  padding: clamp(18px, 4vw, 30px);
}

.cc-screen {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

h1,
h2 {
  margin: 0 0 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.2rem, 3.4vw, 1.5rem);
}

p {
  color: var(--cc-text-dim);
}

.cc-accent-text {
  color: var(--cc-accent);
}

/* ---------- Buttons ---------- */
.cc-btn {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--cc-text);
  background: rgba(163, 206, 241, 0.06);
  border: 1px solid var(--cc-card-border);
  border-radius: var(--cc-radius-btn);
  padding: 12px 18px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.cc-btn:hover {
  background: rgba(163, 206, 241, 0.13);
}

.cc-btn:active {
  transform: scale(0.98);
}

.cc-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.cc-btn-primary {
  background: var(--cc-active);
  border-color: var(--cc-active-border);
}

.cc-btn-primary:hover {
  background: #2d557f;
}

.cc-btn-ghost {
  background: transparent;
}

.cc-btn-block {
  width: 100%;
  text-align: center;
  padding: 14px;
}

.cc-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.cc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- Home ---------- */
.cc-subtitle {
  max-width: 46ch;
  margin: 0 auto;
}

.cc-tip-banner {
  color: var(--cc-accent);
  font-size: 0.9rem;
  font-weight: 500;
  border-left: 3px solid var(--cc-active-border);
}

.cc-tip-inline {
  margin: 0;
  padding: 8px 0 0;
  border-left: none;
  min-height: 1.2em;
}

/* ---------- Learn ---------- */
.cc-eyebrow {
  display: inline-block;
  color: var(--cc-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.cc-scene-wrap {
  margin-top: 14px;
}

.cc-caption {
  margin-top: 10px;
  font-size: 0.9rem;
}

.cc-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 22px;
}

.cc-step-indicator {
  color: var(--cc-text-dim);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

/* ---------- Setup ---------- */
.cc-field-group {
  margin-top: 20px;
}

.cc-field-group:first-of-type {
  margin-top: 4px;
}

.cc-label {
  display: block;
  color: var(--cc-text-dim);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.cc-hint-text {
  margin: 8px 0 0;
  font-size: 0.85rem;
}

.cc-choice-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.cc-choice-btn {
  font-family: inherit;
  font-weight: 600;
  color: var(--cc-text);
  background: var(--cc-card);
  border: 1px solid var(--cc-card-border);
  border-radius: var(--cc-radius-btn);
  padding: 14px;
  cursor: pointer;
}

.cc-choice-btn.active {
  background: var(--cc-active);
  border-color: var(--cc-active-border);
}

.cc-choice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cc-mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  text-align: left;
  font-family: inherit;
  color: var(--cc-text);
  background: var(--cc-card);
  border: 1px solid var(--cc-card-border);
  border-radius: var(--cc-radius-btn);
  padding: 14px 16px;
  cursor: pointer;
  width: 100%;
}

.cc-mode-btn.active {
  background: var(--cc-active);
  border-color: var(--cc-active-border);
}

.cc-mode-name {
  font-weight: 700;
}

.cc-mode-desc {
  color: var(--cc-text-dim);
  font-size: 0.85rem;
}

.cc-mode-btn.active .cc-mode-desc {
  color: rgba(234, 242, 251, 0.8);
}

/* ---------- Play ---------- */
.cc-play-header {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 20px;
}

.cc-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cc-stat-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cc-text-dim);
}

.cc-stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.cc-play-header .cc-btn {
  margin-left: auto;
}

.cc-question {
  color: var(--cc-text);
  font-size: 1.05rem;
  margin-top: 0;
}

.cc-scene-container {
  max-width: 320px;
  margin: 0 auto;
}

.cc-scene {
  width: 100%;
  height: auto;
  display: block;
}

.cc-label,
.cc-aircraft text {
  user-select: none;
}

.cc-aircraft text {
  font-family: var(--cc-font);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* ---------- Dial ---------- */
.cc-dial-wrap {
  display: flex;
  justify-content: center;
  margin: 22px 0 8px;
}

.cc-dial {
  position: relative;
  width: min(280px, 82vw);
  aspect-ratio: 1;
}

.cc-dial-ring {
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  border: 1px dashed var(--cc-card-border);
}

.cc-dial-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cc-card-border);
  transform: translate(-50%, -50%);
}

.cc-dial-btn {
  position: absolute;
  width: 15%;
  aspect-ratio: 1;
  min-width: 34px;
  min-height: 34px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid var(--cc-card-border);
  background: var(--cc-card);
  color: var(--cc-text);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.cc-dial-btn:hover {
  background: rgba(163, 206, 241, 0.16);
}

.cc-dial-btn.is-selected {
  border-color: var(--cc-active-border);
}

.cc-dial-btn.is-correct {
  background: var(--cc-correct);
  border-color: var(--cc-correct);
  color: #06281c;
  transform: translate(-50%, -50%) scale(1.12);
}

.cc-dial-btn.is-incorrect {
  background: var(--cc-incorrect);
  border-color: var(--cc-incorrect);
  color: #300608;
}

.cc-dial-locked .cc-dial-btn {
  cursor: default;
}

/* ---------- Feedback ---------- */
.cc-feedback {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: var(--cc-radius-btn);
  background: rgba(163, 206, 241, 0.06);
  border: 1px solid var(--cc-card-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.cc-feedback p {
  margin: 0;
  color: var(--cc-text);
  font-size: 0.95rem;
}

.cc-play-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ---------- Results ---------- */
.cc-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 18px 0;
}

.cc-result-item {
  background: rgba(163, 206, 241, 0.06);
  border: 1px solid var(--cc-card-border);
  border-radius: var(--cc-radius-btn);
  padding: 14px;
  text-align: center;
}

.cc-result-value {
  font-size: 1.4rem;
  font-weight: 700;
  display: block;
}

.cc-result-label {
  font-size: 0.75rem;
  color: var(--cc-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Stats ---------- */
.cc-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}

.cc-difficulty-progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cc-diff-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cc-diff-name {
  width: 90px;
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: 600;
}

.cc-diff-bar-track {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: rgba(163, 206, 241, 0.1);
  overflow: hidden;
}

.cc-diff-bar-fill {
  height: 100%;
  background: var(--cc-active-border);
  border-radius: 999px;
}

.cc-diff-row.is-complete .cc-diff-bar-fill {
  background: var(--cc-correct);
}

.cc-diff-count {
  width: 46px;
  text-align: right;
  font-size: 0.8rem;
  color: var(--cc-text-dim);
  font-variant-numeric: tabular-nums;
}

.cc-sparkline {
  width: 100%;
  height: 60px;
  display: block;
  margin-top: 6px;
}

/* ---------- Footer ---------- */
.cc-footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--cc-card-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--cc-text-dim);
}

/* ---------- Toast ---------- */
.cc-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--cc-card);
  border: 1px solid var(--cc-glass-border);
  color: var(--cc-text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  z-index: 10;
}

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .cc-badge-logo {
    height: 33px;
  }

  .cc-header-left {
    max-width: calc(50% - 28px);
  }

  .cc-play-header {
    gap: 14px;
  }

  .cc-play-header .cc-btn {
    order: 10;
    width: 100%;
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}