:root {
  --bg-main: #060606;
  --bg-card: #0e0e0e;
  --bg-hover: #161616;
  
  --border-color: #222222;
  --border-glow: #ff2a2a;
  
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  
  --red-accent: #e60012;
  --red-hover: #ff3344;
  --red-glow: rgba(230, 0, 18, 0.2);
  --red-glow-strong: rgba(230, 0, 18, 0.5);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

html {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-main);
  overflow: hidden;
  height: 100%;
  /* Prevent any rubber-band / overscroll on iOS */
  overscroll-behavior: none;
  position: fixed;
  width: 100%;
}

#root {
  height: 100%;
  width: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* App container */
.app-container {
  display: flex;
  /* 100dvh = dynamic viewport height (accounts for mobile browser chrome) */
  height: 100dvh;
  /* Fallback for browsers that don't support dvh */
  height: 100vh;
  height: 100dvh;
  width: 100%;
  max-width: 100vw;
  background-color: var(--bg-main);
  overflow: hidden;
}

/* Sidebar styling */
.sidebar {
  width: 320px;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-header h2 {
  font-size: 1.2rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-primary);
}

.sidebar-header h2 span {
  color: var(--red-accent);
  text-shadow: 0 0 8px var(--red-glow-strong);
}

/* Uploader */
.upload-section {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.upload-dropzone {
  border: 1px dashed var(--border-color);
  border-radius: 6px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  background-color: rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease-in-out;
}

.upload-dropzone:hover {
  border-color: var(--red-accent);
  box-shadow: 0 0 10px var(--red-glow);
  background-color: rgba(230, 0, 18, 0.02);
}

.upload-dropzone p {
  margin: 0 0 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.upload-dropzone span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.upload-progress {
  margin-top: 10px;
  padding: 8px 12px;
  background-color: rgba(230, 0, 18, 0.05);
  border: 1px solid rgba(230, 0, 18, 0.2);
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.upload-spinner {
  width: 12px;
  height: 12px;
  border: 2px solid transparent;
  border-top-color: var(--red-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Documents List */
.documents-container {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
}

.documents-container h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-top: 0;
  margin-bottom: 12px;
}

.document-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.document-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background-color: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.document-item:hover {
  border-color: var(--text-muted);
  background-color: var(--bg-hover);
}

.document-item.active {
  border-color: var(--red-accent);
  background-color: rgba(230, 0, 18, 0.05);
  box-shadow: inset 0 0 5px rgba(230, 0, 18, 0.05);
}

.document-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
  flex-grow: 1;
}

.document-name {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.document-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-badge {
  display: inline-block;
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.ready {
  background-color: rgba(0, 200, 100, 0.1);
  color: #00ff88;
}

.status-badge.chunking, .status-badge.embedding, .status-badge.extracting {
  background-color: rgba(230, 150, 0, 0.1);
  color: #ffaa00;
  animation: pulse 1.5s infinite;
}

.delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.delete-btn:hover {
  color: var(--red-hover);
  background-color: rgba(230, 0, 18, 0.1);
}

/* Chat Main Area */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-main);
  position: relative;
}

.chat-header {
  height: 65px;
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(14, 14, 14, 0.8);
  backdrop-filter: blur(10px);
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.target-badge {
  font-size: 0.75rem;
  background-color: rgba(230, 0, 18, 0.1);
  border: 1px solid rgba(230, 0, 18, 0.3);
  color: var(--red-hover);
  padding: 3px 8px;
  border-radius: 12px;
}

.clear-chat-btn {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.clear-chat-btn:hover {
  border-color: var(--red-accent);
  color: var(--text-primary);
  background-color: rgba(230, 0, 18, 0.05);
}

/* Messages container */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  text-align: center;
  max-width: 500px;
  margin: 0 auto;
}

.empty-state h3 {
  color: var(--text-primary);
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.empty-state h3 span {
  color: var(--red-accent);
}

.empty-state p {
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.message-bubble-wrapper {
  display: flex;
  flex-direction: column;
  max-width: 80%;
}

.message-bubble-wrapper.user {
  align-self: flex-end;
}

.message-bubble-wrapper.assistant {
  align-self: flex-start;
}

.message-bubble {
  display: flex;
  gap: 16px;
  width: 100%;
  padding: 14px 18px;
  border-radius: 10px;
  line-height: 1.5;
  font-size: 0.95rem;
}

.message-bubble.user {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-bottom-right-radius: 2px;
}

.message-bubble.assistant {
  background-color: rgba(230, 0, 18, 0.02);
  border: 1px solid rgba(230, 0, 18, 0.15);
  color: var(--text-primary);
  border-bottom-left-radius: 2px;
}

/* Quota error styling */
.message-bubble.quota-error {
  background-color: rgba(230, 0, 18, 0.08);
  border-color: var(--red-accent);
  color: var(--text-primary);
}

.message-bubble.quota-error .message-content {
  color: var(--red-accent);
  font-weight: 500;
}

/* Sources section under assistant message */
.sources-container {
  margin-top: 8px;
  padding: 0 4px;
}

.sources-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  display: block;
}

.sources-list-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.source-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  max-width: 280px;
  text-align: left;
}

.source-pill:hover {
  border-color: var(--red-accent);
  color: var(--text-primary);
  background-color: rgba(230, 0, 18, 0.05);
  transform: translateY(-1px);
}

.source-icon {
  flex-shrink: 0;
  color: var(--red-hover);
}

.source-filename {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
  max-width: 120px;
}

.source-index {
  color: var(--text-muted);
  font-size: 0.7rem;
  background-color: rgba(255, 255, 255, 0.03);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Premium Modal Styles */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.25s ease-out;
}

.modal-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 700px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(230, 0, 18, 0.15);
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-container {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
  flex-grow: 1;
}

.modal-title-container h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-badge {
  font-size: 0.7rem;
  background-color: rgba(230, 0, 18, 0.1);
  border: 1px solid rgba(230, 0, 18, 0.2);
  color: var(--red-hover);
  padding: 2px 8px;
  border-radius: 12px;
  flex-shrink: 0;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.modal-close-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  background-color: #060606;
}

.source-snippet {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  color: #d8d8d8;
  padding: 16px;
  background-color: #0a0a0a;
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: 6px;
}

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

@keyframes slideUp {
  from {
    transform: translateY(20px) scale(0.96);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}


.message-content {
  white-space: pre-wrap;
  word-break: break-word;
}

/* Chat Input styling */
.chat-input-container {
  padding: 24px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-main);
}

.chat-input-form {
  position: relative;
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 12px;
  transition: all 0.2s ease-in-out;
}

.chat-input-form:focus-within {
  border-color: var(--red-accent);
  box-shadow: 0 0 12px var(--red-glow);
}

.chat-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 4px;
  outline: none;
  resize: none;
}

.send-btn {
  background-color: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.send-btn.active {
  color: var(--red-accent);
}

.send-btn.active:hover {
  color: var(--red-hover);
  transform: scale(1.05);
}

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

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #252525;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--red-accent);
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

/* Sidebar Toggle & Collapsed State */
.sidebar-toggle-arrow {
  position: absolute;
  left: -18px;
  top: 210px;
  transform: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.sidebar-toggle-arrow:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
  border-color: var(--red-accent);
  box-shadow: 0 4px 16px rgba(230, 0, 18, 0.2);
  transform: scale(1.1);
}

.sidebar-toggle-arrow:active {
  color: var(--red-accent);
  transform: scale(0.95);
}

/* Collapsed Sidebar State */
.app-container.sidebar-collapsed .sidebar {
  width: 80px;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-container.sidebar-collapsed .sidebar-header {
  padding: 16px 8px;
  justify-content: center;
}

.app-container.sidebar-collapsed .sidebar-header h2 {
  font-size: 0.9rem;
  letter-spacing: 0px;
}

.app-container.sidebar-collapsed .upload-section {
  padding: 12px 8px;
}

.app-container.sidebar-collapsed .upload-dropzone {
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

.app-container.sidebar-collapsed .upload-dropzone p {
  display: none;
}

.app-container.sidebar-collapsed .upload-dropzone span {
  display: none;
}

.app-container.sidebar-collapsed .upload-dropzone::after {
  content: '📤';
  font-size: 1.4rem;
}

.app-container.sidebar-collapsed .documents-container {
  padding: 10px 4px;
}

.app-container.sidebar-collapsed .documents-container h3 {
  font-size: 0.7rem;
  text-align: center;
}

.app-container.sidebar-collapsed .document-item {
  padding: 8px;
  justify-content: center;
  position: relative;
}

.app-container.sidebar-collapsed .document-info {
  display: none;
}

.app-container.sidebar-collapsed .delete-btn {
  position: absolute;
  right: 0;
  top: 0;
  opacity: 0;
  transition: opacity 0.2s;
}

.app-container.sidebar-collapsed .document-item:hover .delete-btn {
  opacity: 1;
}

.app-container.sidebar-collapsed .document-item::before {
  content: '📄';
  font-size: 1.2rem;
}

/* Expanded Chat Area on Sidebar Collapse */
.chat-area.sidebar-collapsed {
  flex: 1;
  transition: flex 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-container.sidebar-collapsed .settings-info-wrapper {
  display: none !important;
}

/* ===== Mobile: Overlay Drawer Sidebar ===== */

/* The mobile hamburger toggle — hidden on desktop */
.mobile-sidebar-toggle {
  display: none;
}

/* The mobile backdrop — hidden on desktop, shown on mobile via media query */
.mobile-backdrop {
  display: none;
}

@media (max-width: 768px) {
  /* --- Hide the desktop floating arrow toggle --- */
  .sidebar-toggle-arrow {
    display: none;
  }

  /* --- Show the hamburger in the chat header --- */
  .mobile-sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s;
  }

  .mobile-sidebar-toggle:hover {
    color: var(--text-primary);
    border-color: var(--red-accent);
    background-color: rgba(230, 0, 18, 0.05);
  }

  /* --- Sidebar becomes a fixed overlay drawer --- */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    height: 100vh;
    height: 100dvh;
    width: 280px;
    z-index: 500;
    /* Slide in/out */
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s ease;
    /* Always keep the full sidebar visible (not width:0 trick) */
    overflow: hidden;
  }

  /* When sidebar is open on mobile, slide it into view */
  .app-container:not(.sidebar-collapsed) .sidebar {
    transform: translateX(0);
    box-shadow: 4px 0 32px rgba(0, 0, 0, 0.8);
  }

  /* When collapsed, slide completely off-screen */
  .app-container.sidebar-collapsed .sidebar {
    transform: translateX(-100%);
    width: 280px;       /* Keep width so transition is smooth */
    min-width: unset;
    border-right: none;
  }

  /* --- Backdrop overlay when sidebar is open --- */
  /* This is a real div injected by React so it can receive click events */
  .mobile-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 499;
    animation: fadeIn 0.25s ease-out forwards;
  }

  /* --- Chat area always fills full width on mobile --- */
  .chat-area {
    width: 100%;
    flex: 1;
  }

  /* Reduce desktop collapsed sidebar styles that would interfere */
  .app-container.sidebar-collapsed .sidebar-header,
  .app-container.sidebar-collapsed .upload-dropzone,
  .app-container.sidebar-collapsed .documents-container,
  .app-container.sidebar-collapsed .document-item {
    /* Reset any collapsed-state tweaks so drawer looks normal when opened */
    all: revert;
  }

  /* Re-apply base sidebar structure after revert */
  .app-container.sidebar-collapsed .sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .app-container.sidebar-collapsed .sidebar-header h2 {
    font-size: 1.2rem;
    margin: 0;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-primary);
  }

  .app-container.sidebar-collapsed .upload-dropzone {
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    background-color: rgba(0, 0, 0, 0.2);
  }

  .app-container.sidebar-collapsed .upload-dropzone p,
  .app-container.sidebar-collapsed .upload-dropzone span {
    display: block;
  }

  .app-container.sidebar-collapsed .upload-dropzone::after {
    display: none;
  }

  .app-container.sidebar-collapsed .documents-container {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
  }

  .app-container.sidebar-collapsed .document-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
  }

  .app-container.sidebar-collapsed .document-info {
    display: flex;
  }

  .app-container.sidebar-collapsed .document-item::before {
    display: none;
  }

  .app-container.sidebar-collapsed .delete-btn {
    position: static;
    opacity: 1;
  }

  .app-container.sidebar-collapsed .settings-info-wrapper {
    display: flex !important;
  }

  /* --- Chat header & input adjustments --- */
  .chat-header {
    padding: 0 14px;
    gap: 10px;
  }

  .messages-container {
    padding: 14px;
  }

  .chat-input-container {
    padding: 10px 14px;
  }

  .message-bubble-wrapper {
    max-width: 95%;
  }
}

@media (max-width: 480px) {
  .sidebar {
    width: 260px;
  }

  .app-container.sidebar-collapsed .sidebar {
    width: 260px;
  }
}