:root {
  --bg-dark: #070b19;
  --bg-panel: rgba(15, 23, 42, 0.85);
  --bg-card: rgba(20, 30, 55, 0.88);
  --border-glow: rgba(0, 212, 255, 0.35);
  --neon-blue: #00d4ff;
  --neon-cyan: #00f5d4;
  --neon-orange: #ff6b00;
  --neon-pink: #ff2a85;
  --neon-green: #22c55e;
  --neon-yellow: #facc15;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --radius-lg: 20px;
  --radius-md: 14px;
  --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 20%, #132042 0%, #070b19 75%);
  color: var(--text-main);
  font-family: var(--font-family);
  overflow-x: hidden;
}

/* ==========================================
   ВЕРХНЯЯ НАВИГАЦИОННАЯ ПАНЕЛЬ (nav-bar.js)
   ========================================== */
.aifaq-navbar {
  position: fixed;
  top: 12px;
  left: 16px;
  right: 16px;
  min-height: 64px;
  background: var(--bg-panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 2px solid var(--border-glow);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 212, 255, 0.15);
  gap: 12px;
  flex-wrap: wrap;
}

.aifaq-nav-left,
.aifaq-nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.aifaq-nav-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  background: linear-gradient(90deg, #ffffff, #7dd3fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================
   КРУПНЫЕ ДЕТСКИЕ КНОПКИ
   ========================================== */
.kid-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  min-height: 46px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.95));
  border: 2px solid rgba(148, 163, 184, 0.35);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  white-space: nowrap;
}

.kid-btn:hover {
  transform: translateY(-2px) scale(1.02);
  border-color: var(--neon-blue);
  box-shadow: 0 6px 18px rgba(0, 212, 255, 0.3);
}

.kid-btn:active {
  transform: translateY(1px) scale(0.98);
}

.kid-btn.active,
.kid-btn.primary {
  background: linear-gradient(135deg, #0284c7, #00d4ff);
  color: #041326;
  border-color: #7dd3fc;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.55);
}

.kid-btn.warning {
  background: linear-gradient(135deg, #ea580c, #fb923c);
  color: #fff;
  border-color: #fdba74;
  box-shadow: 0 0 18px rgba(251, 146, 60, 0.45);
}

.kid-btn.danger-fun {
  background: linear-gradient(135deg, #be185d, #f43f5e);
  color: #fff;
  border-color: #fda4af;
  box-shadow: 0 0 18px rgba(244, 63, 94, 0.45);
}

.kid-btn.success {
  background: linear-gradient(135deg, #15803d, #22c55e);
  color: #fff;
  border-color: #86efac;
  box-shadow: 0 0 18px rgba(34, 197, 94, 0.45);
}

/* ==========================================
   УДОБНЫЕ ПОЛЗУНКИ (SLIDERS)
   ========================================== */
.kid-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.kid-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.kid-slider-value {
  color: var(--neon-cyan);
  font-size: 1.1rem;
  font-weight: 800;
  background: rgba(0, 245, 212, 0.12);
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid rgba(0, 245, 212, 0.4);
}

input[type="range"].kid-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 16px;
  background: linear-gradient(90deg, #1e293b 0%, #0284c7 60%, #f43f5e 100%);
  border-radius: 999px;
  outline: none;
  border: 2px solid rgba(255, 255, 255, 0.25);
  cursor: pointer;
}

input[type="range"].kid-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #ffffff;
  border: 4px solid var(--neon-blue);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.9);
  cursor: grab;
  transition: transform 0.15s ease;
}

input[type="range"].kid-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"].kid-slider::-moz-range-thumb {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #ffffff;
  border: 4px solid var(--neon-blue);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.9);
  cursor: grab;
}

/* ==========================================
   КАРТОЧКА ОПИСАНИЯ ДЕТАЛИ (TOOLTIP / POPUP)
   ========================================== */
.part-info-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 2px solid var(--neon-blue);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.65), 0 0 25px rgba(0, 212, 255, 0.25);
  color: var(--text-main);
  max-width: 390px;
  animation: popIn 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ==========================================
   АДАПТИВНОСТЬ ПОД ПЛАНШЕТЫ И ЭКРАНЫ
   ========================================== */
@media (max-width: 900px) {
  .aifaq-navbar {
    top: 8px;
    left: 8px;
    right: 8px;
    padding: 8px 12px;
  }
  .aifaq-nav-title {
    font-size: 1.05rem;
  }
  .kid-btn {
    padding: 8px 12px;
    font-size: 0.9rem;
    min-height: 40px;
  }
}