/* Universal Explainer Modal Styles */
.ue-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: ueFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ueFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.ue-modal {
  background: #0d0f12;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7), 0 0 1px 1px rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  color: #e6edf3;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  animation: ueSlideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes ueSlideUp {
  from { transform: translateY(20px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.ue-header {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 0;
  background: #0d0f12;
  z-index: 10;
}

.ue-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ue-header-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(56, 139, 253, 0.12);
  border: 1px solid rgba(56, 139, 253, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #58a6ff;
  font-size: 16px;
  flex-shrink: 0;
}

.ue-title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: #f0f6fc;
}

.ue-subtitle {
  margin: 3px 0 0 0;
  font-size: 12px;
  color: #8b949e;
}

.ue-close-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #8b949e;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.ue-close-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #f0f6fc;
  border-color: rgba(255, 255, 255, 0.2);
}

.ue-tabs {
  display: flex;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.015);
  gap: 8px;
  overflow-x: auto;
}

.ue-tab {
  background: transparent;
  border: none;
  color: #8b949e;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.ue-tab:hover {
  color: #c9d1d9;
}

.ue-tab.active {
  color: #58a6ff;
  border-bottom-color: #58a6ff;
}

.ue-body {
  padding: 24px;
  flex: 1;
}

.ue-section {
  margin-bottom: 20px;
}

.ue-section:last-child {
  margin-bottom: 0;
}

.ue-section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #8b949e;
  margin-bottom: 8px;
  font-weight: 600;
}

.ue-p {
  font-size: 14px;
  line-height: 1.6;
  color: #c9d1d9;
  margin: 0 0 12px 0;
}

.ue-analogy-box {
  background: rgba(56, 139, 253, 0.06);
  border: 1px solid rgba(56, 139, 253, 0.2);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 14px 0;
}

.ue-analogy-title {
  font-size: 12px;
  font-weight: 600;
  color: #58a6ff;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.ue-formula-card {
  background: #161b22;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 18px;
  margin: 14px 0;
  text-align: center;
  overflow-x: auto;
}

.ue-formula {
  font-family: "Courier New", Courier, monospace;
  font-size: 16px;
  font-weight: 600;
  color: #79c0ff;
}

.ue-vars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.ue-var-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 10px;
  font-size: 12px;
}

.ue-var-symbol {
  font-weight: 700;
  color: #79c0ff;
  font-family: monospace;
}

.ue-callout-warning {
  background: rgba(210, 153, 34, 0.08);
  border: 1px solid rgba(210, 153, 34, 0.25);
  border-radius: 10px;
  padding: 14px;
  font-size: 13px;
  color: #d29922;
  line-height: 1.5;
  margin-top: 14px;
}

.ue-callout-warning strong {
  color: #e3b341;
}

.ue-interactive-box {
  background: rgba(35, 134, 54, 0.08);
  border: 1px solid rgba(46, 160, 67, 0.25);
  border-radius: 10px;
  padding: 16px;
  margin-top: 16px;
}

.ue-slider-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
}

.ue-slider-group label {
  font-size: 12px;
  color: #8b949e;
  min-width: 110px;
}

.ue-slider-group input[type="range"] {
  flex: 1;
  accent-color: #2ea043;
}

.ue-slider-val {
  font-family: monospace;
  font-size: 13px;
  color: #56d364;
  min-width: 60px;
  text-align: right;
}

.ue-calc-result {
  background: #0d1117;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.ue-calc-label {
  font-size: 13px;
  color: #8b949e;
}

.ue-calc-num {
  font-size: 18px;
  font-weight: 700;
  color: #58a6ff;
  font-family: monospace;
}

.ue-badge-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(56, 139, 253, 0.1);
  border: 1px solid rgba(56, 139, 253, 0.2);
  color: #58a6ff;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  user-select: none;
}

.ue-badge-trigger:hover {
  background: rgba(56, 139, 253, 0.2);
  border-color: rgba(56, 139, 253, 0.4);
  color: #79c0ff;
}

.ue-badge-trigger i {
  font-size: 10px;
}

.ue-footer {
  padding: 16px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.015);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ue-footer-text {
  font-size: 11px;
  color: #6e7681;
}

.ue-footer-btn {
  background: #21262d;
  color: #c9d1d9;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ue-footer-btn:hover {
  background: #30363d;
  color: #f0f6fc;
}