:root {
  color-scheme: dark;
  --bg: #0b1024;
  --panel: #141b33;
  --panel-soft: rgba(20, 27, 51, 0.8);
  --accent: #f4b23f;
  --accent-2: #4ade80;
  --text: #f8f6ef;
  --muted: #b7c0d9;
  --danger: #ff8b8b;
  --shadow: rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Nunito", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #142042, #060816 70%);
  color: var(--text);
  min-height: 100vh;
}

button,
input,
select,
textarea {
  font-family: inherit;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 90px 16px 40px;
}

.ad-slot {
  width: 100%;
  margin: 16px 0;
  height: 0;
  overflow: hidden;
}

.game-shell {
  background: var(--panel-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 20px 60px var(--shadow);
  position: relative;
  overflow: hidden;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.mute-toggle {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.start-screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, rgba(6, 14, 37, 0.95), rgba(4, 6, 16, 0.96));
  z-index: 4;
  padding: 24px;
}

.start-card,
.results-card {
  background: var(--panel);
  border-radius: 20px;
  padding: 28px;
  max-width: 520px;
  width: 100%;
  text-align: center;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.start-card h1 {
  font-family: "Poppins", sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 10px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 18px;
}

.rules {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
  text-align: left;
}

.rule {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.05);
  padding: 12px;
  border-radius: 12px;
}

.rule span {
  font-size: 1.4rem;
}

.primary,
.secondary {
  border-radius: 999px;
  padding: 10px 18px;
  border: none;
  cursor: pointer;
  font-weight: 700;
}

.primary {
  background: linear-gradient(120deg, #f5d06f, #f4a54a);
  color: #1a1406;
}

.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  background: rgba(8, 12, 28, 0.7);
  padding: 10px 14px;
  border-radius: 12px;
  margin-bottom: 12px;
  font-weight: 700;
}

.hud-item {
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 12px;
  border-radius: 999px;
  min-width: 110px;
  text-align: center;
}

.hud-item.bonus {
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.canvas-shell {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #04060f;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

#game-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: transparent;
}

.canvas-fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  color: var(--muted);
  background: #0b1024;
}

.canvas-shell.no-canvas .canvas-fallback {
  display: flex;
}

.controls {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.dpad {
  display: grid;
  gap: 6px;
}

.dpad-row {
  display: flex;
  gap: 6px;
}

.control-btn {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
  min-width: 52px;
  cursor: pointer;
  font-weight: 700;
}

.control-btn:active {
  transform: translateY(1px);
}

.control-btn.interact {
  min-width: 120px;
  background: rgba(244, 178, 63, 0.2);
  border-color: rgba(244, 178, 63, 0.7);
}

.control-btn.interact[disabled] {
  opacity: 0.5;
}

.interaction-hint {
  text-align: center;
  margin-top: 10px;
  color: var(--muted);
  min-height: 22px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 20, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.panel {
  background: var(--panel);
  border-radius: 18px;
  padding: 22px;
  max-width: 540px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.choices {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.choice-btn {
  text-align: left;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

.choice-btn.correct {
  border-color: rgba(74, 222, 128, 0.8);
  background: rgba(74, 222, 128, 0.2);
}

.choice-btn.wrong {
  border-color: rgba(255, 139, 139, 0.8);
  background: rgba(255, 139, 139, 0.2);
}

.feedback {
  margin-top: 12px;
  font-weight: 700;
}

.explanation {
  margin-top: 8px;
  color: var(--muted);
}

.stats-grid,
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

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

.results-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(4, 6, 16, 0.95);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 30;
}

.results-screen.active {
  opacity: 1;
  pointer-events: auto;
}

.results-card {
  text-align: left;
}

.results-card h2 {
  text-align: center;
  margin-bottom: 10px;
}

@media (max-width: 720px) {
  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .control-btn {
    width: 100%;
  }

  .hud-item {
    min-width: 90px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}