/* Explain Mode — toggle button, selection overlay, drawer */

/* Toggle button injected by explain-mode.js */
#explain-mode-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9000;
  background: #1e3a5f;
  color: #7dd3fc;
  border: 1px solid #2a5a8f;
  border-radius: 24px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background 0.15s, color 0.15s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  letter-spacing: 0.3px;
}
#explain-mode-btn:hover {
  background: #2a5a8f;
}
#explain-mode-btn.active {
  background: #7dd3fc;
  color: #07090f;
  border-color: #7dd3fc;
}

/* Selection cursor when explain mode is on */
body.explain-mode-on [data-explainable] {
  cursor: help;
  outline: 2px dashed rgba(125,211,252,0.65);
  outline-offset: 3px;
  transition: outline-color 0.1s, background 0.1s;
}
body.explain-mode-on [data-explainable]:hover {
  outline-color: #7dd3fc;
  background: rgba(125,211,252,0.08);
}

/* Hint bar shown when mode is active */
#explain-mode-hint {
  display: none;
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9000;
  background: rgba(7, 12, 22, 0.92);
  border: 1px solid rgba(125,211,252,0.45);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 12px;
  color: #bae6fd;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  max-width: min(720px, calc(100vw - 24px));
  text-align: center;
  pointer-events: none;
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
}
body.explain-mode-on #explain-mode-hint {
  display: block;
}

/* Side drawer */
#explain-drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 400px;
  height: 100vh;
  background: #0b1628;
  border-left: 1px solid #1e3a5f;
  z-index: 9100;
  display: flex;
  flex-direction: column;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: right 0.25s cubic-bezier(0.4,0,0.2,1);
  overflow: hidden;
}
#explain-drawer.open {
  right: 0;
}

#explain-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #1e3a5f;
  flex-shrink: 0;
}
#explain-drawer-header .drawer-title {
  font-size: 13px;
  font-weight: 700;
  color: #7dd3fc;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
#explain-drawer-close {
  background: none;
  border: none;
  color: #475569;
  font-size: 20px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
#explain-drawer-close:hover {
  color: #94a3b8;
}

#explain-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.explain-section {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.explain-section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #334155;
}
.explain-section-body {
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.65;
}
.explain-section-body.muted {
  color: #475569;
  font-style: italic;
}
.explain-section-body.loading {
  color: #334155;
  font-style: italic;
}

.explain-clicked-text {
  font-size: 12px;
  color: #64748b;
  background: #111827;
  border: 1px solid #1e2d4a;
  border-radius: 6px;
  padding: 8px 10px;
  line-height: 1.4;
  font-style: italic;
}

/* Follow-up suggestions */
.explain-followup-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.explain-followup-chip {
  background: #111827;
  color: #7dd3fc;
  border: 1px solid #1e3a5f;
  border-radius: 14px;
  padding: 4px 12px;
  font-size: 11px;
  cursor: pointer;
  transition: background 0.12s;
}
.explain-followup-chip:hover {
  background: #1e3a5f;
}

/* Follow-up input area */
#explain-drawer-footer {
  padding: 14px 20px;
  border-top: 1px solid #1e2d4a;
  flex-shrink: 0;
  display: flex;
  gap: 8px;
}
#explain-followup-input {
  flex: 1;
  background: #111827;
  border: 1px solid #1e3a5f;
  border-radius: 8px;
  color: #e8eaf0;
  font-size: 12px;
  padding: 8px 12px;
  outline: none;
  font-family: inherit;
}
#explain-followup-input:focus {
  border-color: #7dd3fc;
}
#explain-followup-ask {
  background: #1e3a5f;
  color: #7dd3fc;
  border: 1px solid #2a5a8f;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s;
}
#explain-followup-ask:hover {
  background: #2a5a8f;
}

/* Level switcher bar */
#explain-level-bar {
  display: flex;
  flex-shrink: 0;
  padding: 8px 20px;
  gap: 6px;
  border-bottom: 1px solid #1e2d4a;
  background: #0b1628;
}
.explain-level-btn {
  flex: 1;
  background: #111827;
  color: #475569;
  border: 1px solid #1e2d4a;
  border-radius: 6px;
  padding: 5px 0;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.explain-level-btn:hover {
  background: #1e2d4a;
  color: #94a3b8;
}
.explain-level-btn.active {
  background: #1e3a5f;
  color: #7dd3fc;
  border-color: #2a5a8f;
}

/* Drawer backdrop dimmer */
#explain-drawer-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 9050;
}
#explain-drawer-backdrop.visible {
  display: block;
}

/* Responsive: full-width on narrow viewports */
@media (max-width: 440px) {
  #explain-drawer {
    width: 100vw;
    right: -100vw;
  }
}