:root {
  --rag-neon-primary: #00f0ff;
  --rag-neon-secondary: #bc13fe;
  --rag-neon-accent: #2979ff;
  --rag-bg-deep: #0a0b10;
  --rag-bg-card: rgba(13, 15, 24, 0.96);
  --rag-bg-message-user: rgba(0, 112, 243, 0.18);
  --rag-bg-message-ai: rgba(255, 255, 255, 0.05);
  --rag-border: rgba(0, 240, 255, 0.25);
  --rag-border-glow: rgba(0, 240, 255, 0.55);
  --rag-text: #e8eaf6;
  --rag-text-muted: #94a3b8;
  --rag-radius: 0.6rem;
}

/* ===== Overlay ===== */
.rag-search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(2, 3, 8, 0.65);
  backdrop-filter: blur(2px);
  z-index: 3;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.rag-search-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ===== Panel ===== */
.rag-search-panel {
  position: fixed;
  top: 4.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(-0.5rem);
  width: min(760px, calc(100vw - 2rem));
  max-height: calc(100vh - 7rem);
  background: var(--rag-bg-card);
  border: 1px solid var(--rag-border);
  border-radius: var(--rag-radius);
  box-shadow:
    0 0 0 1px rgba(0, 240, 255, 0.08),
    0 1rem 3rem rgba(0, 0, 0, 0.55),
    0 0 2.5rem rgba(0, 240, 255, 0.12);
  z-index: 4;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
  overflow: hidden;
}

.rag-search-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ===== Header ===== */
.rag-search-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--rag-border);
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.06), transparent 60%);
}

.rag-search-icon {
  width: 1.3rem;
  height: 1.3rem;
  color: var(--rag-neon-primary);
  flex-shrink: 0;
  filter: drop-shadow(0 0 4px rgba(0, 240, 255, 0.5));
}

.rag-search-title {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--rag-text);
  letter-spacing: 0.02em;
}

.rag-search-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 0.7rem;
  margin-right: 0.3rem;
  border-radius: 0.35rem;
  cursor: pointer;
  color: var(--rag-text-muted);
  border: 1px solid transparent;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 500;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.rag-search-action:hover,
.rag-search-action:focus {
  color: var(--rag-neon-primary);
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--rag-border);
  outline: none;
}

.rag-search-action svg {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

.rag-search-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.35rem;
  cursor: pointer;
  color: var(--rag-text-muted);
  border: 1px solid transparent;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.rag-search-close:hover,
.rag-search-close:focus {
  color: var(--rag-neon-primary);
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--rag-border);
  outline: none;
}

.rag-search-close svg {
  width: 1.2rem;
  height: 1.2rem;
}

@media (max-width: 768px) {
  .rag-search-action span {
    display: none;
  }

  .rag-search-action {
    padding: 0.45rem;
  }
}

/* ===== Mode tabs ===== */
.rag-mode-tabs {
  display: flex;
  gap: 0.4rem;
  padding: 0.5rem 0.8rem 0;
  border-bottom: 1px solid var(--rag-border);
  background: rgba(0, 0, 0, 0.2);
}

.rag-mode-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.8rem;
  border: none;
  background: transparent;
  color: var(--rag-text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 0.35rem 0.35rem 0 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.rag-mode-tab svg {
  width: 0.95rem;
  height: 0.95rem;
}

.rag-mode-tab:hover,
.rag-mode-tab:focus {
  color: var(--rag-text);
  background: rgba(255, 255, 255, 0.04);
  outline: none;
}

.rag-mode-tab.active {
  color: var(--rag-neon-primary);
  border-bottom-color: var(--rag-neon-primary);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.35);
}

/* ===== Views ===== */
.rag-view {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.rag-view.active {
  display: flex;
}

/* ===== Chat messages ===== */
.rag-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.rag-message {
  display: flex;
  gap: 0.7rem;
  max-width: 92%;
  animation: rag-fade-in 0.25s ease;
}

@keyframes rag-fade-in {
  from { opacity: 0; transform: translateY(0.4rem); }
  to { opacity: 1; transform: translateY(0); }
}

.rag-message-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.rag-message-ai {
  align-self: flex-start;
}

.rag-message-avatar {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--rag-border);
  color: var(--rag-neon-primary);
  box-shadow: 0 0 0.6rem rgba(0, 240, 255, 0.15);
}

.rag-message-avatar svg {
  width: 1.1rem;
  height: 1.1rem;
}

.rag-message-user .rag-message-avatar {
  background: rgba(41, 121, 255, 0.18);
  border-color: rgba(41, 121, 255, 0.4);
  color: var(--rag-neon-accent);
  box-shadow: 0 0 0.6rem rgba(41, 121, 255, 0.15);
}

.rag-message-content {
  padding: 0.7rem 0.9rem;
  border-radius: var(--rag-radius);
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--rag-text);
  border: 1px solid transparent;
  word-break: break-word;
}

.rag-message-content p {
  margin: 0 0 0.5rem;
}

.rag-message-content p:last-child {
  margin-bottom: 0;
}

.rag-message-content ul,
.rag-message-content ol {
  margin: 0.3rem 0;
  padding-left: 1.2rem;
}

.rag-message-content li {
  margin: 0.15rem 0;
}

.rag-message-content a {
  color: var(--rag-neon-primary);
  text-decoration: underline;
  text-underline-offset: 0.15rem;
}

.rag-message-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8em;
  background: rgba(0, 0, 0, 0.35);
  padding: 0.15rem 0.35rem;
  border-radius: 0.25rem;
  color: var(--rag-neon-primary);
  border: 1px solid rgba(0, 240, 255, 0.15);
}

.rag-message-content pre {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--rag-border);
  border-radius: 0.4rem;
  padding: 0.7rem;
  overflow-x: auto;
  margin: 0.5rem 0;
}

.rag-message-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: #c3e88d;
}

.rag-message-ai .rag-message-content {
  background: var(--rag-bg-message-ai);
  border-color: var(--rag-border);
  border-top-left-radius: 0.2rem;
}

.rag-message-user .rag-message-content {
  background: var(--rag-bg-message-user);
  border-color: rgba(41, 121, 255, 0.35);
  border-top-right-radius: 0.2rem;
}

.rag-message.rag-welcome .rag-message-content {
  background: rgba(188, 19, 254, 0.08);
  border-color: rgba(188, 19, 254, 0.3);
}

/* Streaming cursor */
.rag-streaming-cursor {
  display: inline-block;
  width: 0.5em;
  height: 1em;
  background: var(--rag-neon-primary);
  margin-left: 0.15rem;
  vertical-align: middle;
  animation: rag-blink 0.9s step-end infinite;
  box-shadow: 0 0 6px var(--rag-neon-primary);
}

@keyframes rag-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Tool status */
.rag-tool-status {
  padding: 0.35rem 1rem;
  font-size: 0.72rem;
  color: var(--rag-neon-primary);
  display: none;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 240, 255, 0.06);
  border-top: 1px solid var(--rag-border);
}

.rag-tool-status.active {
  display: flex;
}

.rag-tool-status::before {
  content: '';
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--rag-neon-primary);
  box-shadow: 0 0 0.4rem var(--rag-neon-primary);
  animation: rag-pulse-dot 1.2s ease-in-out infinite;
}

@keyframes rag-pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ===== Chat input area ===== */
.rag-input-area {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--rag-border);
  background: rgba(0, 0, 0, 0.25);
}

.rag-chat-input {
  flex: 1;
  min-height: 2.4rem;
  max-height: 8rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--rag-border);
  border-radius: 0.45rem;
  background: rgba(0, 0, 0, 0.35);
  color: var(--rag-text);
  font-size: 0.85rem;
  line-height: 1.45;
  resize: none;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.rag-chat-input::placeholder {
  color: var(--rag-text-muted);
}

.rag-chat-input:focus {
  border-color: var(--rag-border-glow);
  box-shadow: 0 0 0.8rem rgba(0, 240, 255, 0.15);
}

.rag-chat-send {
  width: 2.4rem;
  height: 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 0.45rem;
  background: linear-gradient(135deg, var(--rag-neon-accent) 0%, var(--rag-neon-primary) 100%);
  color: #001;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.rag-chat-send:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 0 1rem rgba(0, 240, 255, 0.4);
}

.rag-chat-send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.rag-chat-send svg {
  width: 1.1rem;
  height: 1.1rem;
}

/* ===== Search view ===== */
.rag-search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--rag-border);
  background: rgba(0, 0, 0, 0.2);
}

.rag-search-box-icon {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--rag-neon-primary);
  flex-shrink: 0;
}

.rag-search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.9rem;
  color: var(--rag-text);
  min-width: 0;
}

.rag-search-input::placeholder {
  color: var(--rag-text-muted);
}

.rag-search-status {
  padding: 0.35rem 1rem;
  font-size: 0.7rem;
  color: var(--rag-text-muted);
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--rag-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.rag-search-status:empty {
  display: none;
}

.rag-search-results {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.rag-search-result {
  display: block;
  padding: 0.6rem 0.75rem;
  border-radius: 0.35rem;
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.rag-search-result:hover,
.rag-search-result:focus {
  background: rgba(0, 240, 255, 0.06);
  border-color: var(--rag-border);
  outline: none;
}

.rag-search-result-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--rag-text);
  line-height: 1.3;
  margin-bottom: 0.15rem;
}

.rag-search-result-title mark {
  background: rgba(0, 240, 255, 0.25);
  color: var(--rag-neon-primary);
  padding: 0 0.15rem;
  border-radius: 0.15rem;
}

.rag-search-result-heading {
  font-size: 0.7rem;
  color: var(--rag-text-muted);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rag-search-result-snippet {
  font-size: 0.74rem;
  color: var(--rag-text-muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rag-search-result-meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.25rem;
  font-size: 0.65rem;
  color: var(--rag-text-muted);
}

.rag-search-result-module {
  display: inline-block;
  padding: 0.08rem 0.35rem;
  border-radius: 0.25rem;
  background: rgba(0, 240, 255, 0.1);
  color: var(--rag-neon-primary);
  text-transform: uppercase;
  border: 1px solid var(--rag-border);
}

.rag-search-empty,
.rag-search-loading {
  padding: 2.5rem 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--rag-text-muted);
}

.rag-search-loading svg {
  width: 1.6rem;
  height: 1.6rem;
  animation: rag-spin 1s linear infinite;
  margin-bottom: 0.6rem;
  color: var(--rag-neon-primary);
  filter: drop-shadow(0 0 4px rgba(0, 240, 255, 0.5));
}

@keyframes rag-spin {
  to { transform: rotate(360deg); }
}

/* ===== Floating action button ===== */
.rag-search-fab {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 1.1rem;
  border: none;
  border-radius: 2rem;
  background: linear-gradient(135deg, #0d1117 0%, #1a0d24 100%);
  color: var(--rag-text);
  box-shadow:
    0 0.25rem 1rem rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(0, 240, 255, 0.45),
    0 0 1.2rem rgba(0, 240, 255, 0.22);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.rag-search-fab:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #111827 0%, #231231 100%);
  box-shadow:
    0 0.4rem 1.5rem rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(0, 240, 255, 0.65),
    0 0 1.8rem rgba(0, 240, 255, 0.35);
}

.rag-search-fab:active {
  transform: translateY(0);
}

.rag-search-fab-ring {
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--rag-neon-primary), var(--rag-neon-secondary)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.8;
  animation: rag-fab-pulse 2.2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes rag-fab-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.9; transform: scale(1.02); }
}

.rag-search-fab-icon {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
  color: var(--rag-neon-primary);
  filter: drop-shadow(0 0 4px rgba(0, 240, 255, 0.5));
}

.rag-search-fab-text {
  white-space: nowrap;
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.35);
}

.rag-search-fab-close {
  position: absolute;
  top: -0.35rem;
  right: -0.35rem;
  width: 1.1rem;
  height: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--rag-bg-card);
  color: var(--rag-text-muted);
  cursor: pointer;
  box-shadow: 0 0 0 1px var(--rag-border), 0 0.1rem 0.25rem rgba(0, 0, 0, 0.4);
  transition: color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.rag-search-fab-close:hover,
.rag-search-fab-close:focus {
  color: var(--rag-neon-primary);
  background: rgba(0, 240, 255, 0.15);
  transform: scale(1.15);
  outline: none;
}

.rag-search-fab-close svg {
  width: 0.75rem;
  height: 0.75rem;
}

.rag-search-fab-hidden {
  display: none !important;
}

/* ===== Scrollbar ===== */
.rag-messages::-webkit-scrollbar,
.rag-search-results::-webkit-scrollbar {
  width: 6px;
}

.rag-messages::-webkit-scrollbar-thumb,
.rag-search-results::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.25);
  border-radius: 3px;
}

.rag-messages::-webkit-scrollbar-thumb:hover,
.rag-search-results::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 240, 255, 0.45);
}

/* ===== Desktop placement (anchored to FAB) ===== */
@media (min-width: 769px) {
  .rag-search-panel {
    top: auto;
    bottom: 5.5rem;
    right: 1.5rem;
    left: auto;
    transform: translateY(0.5rem);
    transform-origin: bottom right;
  }

  .rag-search-panel.active {
    transform: translateY(0);
  }
}

/* ===== Mobile adjustments ===== */
@media (max-width: 768px) {
  .rag-search-panel {
    top: auto;
    bottom: 4.8rem;
    left: 0.5rem;
    right: 0.5rem;
    width: auto;
    transform: translateY(0.5rem);
    max-height: calc(100vh - 6rem);
  }

  .rag-search-panel.active {
    transform: translateY(0);
  }

  .rag-search-fab {
    right: 1rem;
    bottom: 1rem;
    padding: 0.7rem;
  }

  .rag-search-fab-text {
    display: none;
  }

  .rag-message {
    max-width: 95%;
  }

  .rag-message-content {
    font-size: 0.82rem;
  }
}