:root {
  --primary-color: #273843;
  --secondary-color: #576F7A;
  --accent-color: #94AAB3;
  --background-color: #F0F4F5;
  --text-color: #152330;
  --border-color: #BCCCD1;
  --success-color: #4CAF50;
  --error-color: #F44336;
  --warning-color: #FF9800;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

header h1 {
  color: var(--primary-color);
  margin-bottom: 10px;
}

header p {
  color: var(--secondary-color);
}

#status-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 15px;
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 15px;
}

.main-nav a {
  text-decoration: none;
  color: var(--secondary-color);
  padding: 5px 10px;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.main-nav a:hover {
  color: var(--primary-color);
  background-color: rgba(0, 0, 0, 0.05);
}

.main-nav a.active {
  color: var(--primary-color);
  font-weight: bold;
  border-bottom: 2px solid var(--primary-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 14px;
}

.status-label {
  font-weight: bold;
}

.status-value {
  padding: 2px 8px;
  border-radius: 12px;
  background-color: #e0e0e0;
}

.status-value.success {
  background-color: var(--success-color);
  color: white;
}

.status-value.error {
  background-color: var(--error-color);
  color: white;
}

.tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.tab-button {
  padding: 10px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--secondary-color);
  transition: all 0.3s ease;
}

.tab-button:hover {
  color: var(--primary-color);
}

.tab-button.active {
  color: var(--primary-color);
  border-bottom: 3px solid var(--primary-color);
  font-weight: bold;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.search-container, .chat-container {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 30px;
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.search-form > * {
  margin-bottom: 10px;
}

#search-input {
  flex-grow: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px;
}

#search-type {
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px;
}

.search-options {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: center;
}

.option-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.option-group label {
  font-size: 14px;
  color: var(--secondary-color);
}

#search-limit, #min-confidence, #fact-limit, #document-limit,
#enhanced-fact-limit, #enhanced-document-limit {
  width: 60px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
}

.chat-options {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 15px;
  padding: 10px;
  background-color: #f0f0f0;
  border-radius: 4px;
}

#search-button, #chat-send, #chat-reset, #enhanced-chat-send, #enhanced-chat-reset, #enhanced-new-session {
  padding: 10px 20px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

#search-button:hover, #chat-send:hover, #chat-reset:hover,
#enhanced-chat-send:hover, #enhanced-chat-reset:hover, #enhanced-new-session:hover {
  background-color: var(--secondary-color);
}

.results-container {
  min-height: 200px;
}

.placeholder {
  color: var(--secondary-color);
  text-align: center;
  padding: 20px;
}

.result-item {
  margin-bottom: 20px;
  padding: 15px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: #f9f9f9;
}

.result-content {
  margin-bottom: 10px;
}

.result-metadata {
  font-size: 14px;
  color: var(--secondary-color);
}

.result-score {
  font-weight: bold;
  color: var(--primary-color);
}

.chat-messages {
  height: 400px;
  overflow-y: auto;
  margin-bottom: 20px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: #f9f9f9;
}

.message {
  margin-bottom: 15px;
  max-width: 80%;
}

.message.user {
  margin-left: auto;
}

.message.system, .message.assistant {
  margin-right: auto;
}

.message-content {
  padding: 10px 15px;
  border-radius: 18px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message.user .message-content {
  background-color: var(--primary-color);
  color: white;
  border-top-right-radius: 4px;
}

.message.system .message-content {
  background-color: var(--accent-color);
  color: var(--text-color);
  border-top-left-radius: 4px;
}

.message.assistant .message-content {
  background-color: var(--secondary-color);
  color: white;
  border-top-left-radius: 4px;
}

.chat-input-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#chat-input, #enhanced-chat-input {
  width: 100%;
  height: 100px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px;
  resize: none;
  font-family: inherit;
}

.chat-buttons {
  display: flex;
  gap: 10px;
}

#chat-reset, #enhanced-chat-reset {
  background-color: var(--secondary-color);
}

#enhanced-new-session {
  background-color: var(--accent-color);
  color: var(--text-color);
}

.session-id {
  font-size: 12px;
  background-color: var(--accent-color);
  color: var(--text-color);
  padding: 3px 8px;
  border-radius: 12px;
  display: inline-block;
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Styles for fact and document results */
.result-item.fact {
  border-left: 4px solid #4CAF50;
}

.result-item.document {
  border-left: 4px solid #2196F3;
}

.result-source {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: bold;
  margin-right: 5px;
}

.result-source.fact {
  background-color: #4CAF50;
  color: white;
}

.result-source.document {
  background-color: #2196F3;
  color: white;
}

footer {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--secondary-color);
  font-size: 14px;
}

/* Markdown table styles */
.markdown-table {
  border-collapse: collapse;
  width: 100%;
  margin: 15px 0;
  font-size: 14px;
  background-color: white;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  color:#576F7A;
}

.markdown-table th,
.markdown-table td {
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  vertical-align: top;
}

.markdown-table th {
  background-color: var(--primary-color);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.5px;
}

.markdown-table tbody tr {
  transition: background-color 0.2s ease;
}

.markdown-table tbody tr:nth-child(even) {
  background-color: #f8f9fa;
}

.markdown-table tbody tr:hover {
  background-color: var(--accent-color);
  color: var(--text-color);
}

.markdown-table td {
  line-height: 1.5;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .search-form {
    flex-direction: column;
  }

  #search-type, #search-limit {
    width: 100%;
  }

  .status-container {
    flex-direction: column;
    align-items: center;
  }

  /* Responsive table styles */
  .markdown-table {
    font-size: 12px;
    overflow-x: auto;
    display: block;
    white-space: nowrap;
  }

  .markdown-table th,
  .markdown-table td {
    padding: 8px 10px;
    min-width: 100px;
  }

  .markdown-table th {
    font-size: 11px;
  }
}


/* SIE-94: Fullscreen-focused layout for consolidated Enhanced RAG view */
html, body {
  height: 100%;
}
.container {
  max-width: 100%;
}
/* Make chat area taller to leverage viewport height */
#enhanced-rag .chat-messages,
#enhanced-rag-tab .chat-messages {
  /* fallback selector keeps compatibility if old id exists */
  height: calc(80vh - 220px);
}


/* SIE-96: Modern, spacious chat canvas layout */

/* compact header controls */
.header-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.header-controls .left, .header-controls .right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-header .brand {
  font-weight: 700;
  color: var(--primary-color);
}
.app-header .subtitle {
  color: var(--secondary-color);
  font-size: 0.9rem;
}

/* Status pills in header stay as-is */

.chat-canvas {
  position: relative;
  height: calc(100vh - 160px); /* header is smaller now */
  display: flex;
  flex-direction: column;
  background: transparent;
}
.toolbar {
  display: none; /* controls moved to header */
}
.toolbar .left, .toolbar .right { display: none; }
.btn-ghost {
  background: transparent;
  color: var(--secondary-color);
  border: 1px solid var(--border-color);
  padding: 4px 8px; /* compact */
  border-radius: 6px;
}
.btn-compact { font-size: 12px; padding: 2px 6px; }
.header-controls.compact .option-group label { font-size: 12px; }
.header-controls.compact .option-group input,
.header-controls.compact .option-group select { height: 28px; padding: 2px 6px; font-size: 12px; }

/* Messages area - full bleed, no card box */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 4px 100px; /* bottom space for composer */
}

/* Remove old card look */
.chat-container { box-shadow: none; background: transparent; padding: 0; }
.chat-options { background: transparent; border: none; padding: 0; }

/* Composer fixed to bottom */
.composer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--border-color);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.composer textarea {
  flex: 1;
  height: 56px;
  resize: none;
  border-radius: 10px;
}
.composer-actions { display: flex; gap: 8px; }
.btn-primary { background: var(--primary-color); color: #fff; border: none; padding: 10px 16px; border-radius: 8px; }
.btn-secondary { background: var(--secondary-color); color: #fff; border: none; padding: 10px 16px; border-radius: 8px; }

/* Message bubbles remain */
.message { max-width: 900px; }
.messages .message + .message { margin-top: 12px; }

/* Responsive */
@media (max-width: 768px) {
  .composer textarea { height: 48px; }
  .toolbar { flex-wrap: wrap; }
}


/* Laptop: make header single-line and ultra compact */
@media (min-width: 1024px) {
  .app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 2px 0; /* reduce height */
    border-bottom: 1px solid var(--border-color);
    flex-wrap: nowrap;
  }
  .app-header .brand { font-size: 16px; line-height: 1; }
  .header-controls { flex: 1; display: flex; align-items: center; gap: 8px; }
  .header-controls .left, .header-controls .right { gap: 8px; }
  .header-controls .option-group label, .session-label { display: none; }
  .header-controls.compact .option-group input,
  .header-controls.compact .option-group select { height: 24px; padding: 2px 6px; font-size: 11px; }
  #status-container { display: flex; gap: 8px; margin-top: 0; }
  .status-indicator { font-size: 12px; }
  .session-id { font-size: 11px; }
  .btn-ghost.btn-compact { padding: 2px 6px; font-size: 11px; }
  .chat-canvas { height: calc(100vh - 100px); }
}