/* ==========================================
   CSS CUSTOM PROPERTIES (THEME TOKENS)
   ========================================== */
:root {
  /* Dark Theme (Default) */
  --bg-gradient: radial-gradient(circle at 10% 20%, #1e293b 0%, #0f172a 90%);
  --card-bg: rgba(30, 41, 59, 0.45);
  --card-border: rgba(255, 255, 255, 0.07);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --input-bg: rgba(15, 23, 42, 0.65);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-text: #f8fafc;
  --response-bg: rgba(15, 23, 42, 0.5);
  --response-border: rgba(255, 255, 255, 0.08);
  --response-text: #e2e8f0;
  --heading-color: #f8fafc;
  --nav-bg: rgba(15, 23, 42, 0.8);
  --footer-bg: rgba(15, 23, 42, 0.9);
  --accent-strong: #60a5fa;
  --code-bg: #0b0f19;
  --code-text: #34d399;
  --progress-bg: rgba(15, 23, 42, 0.6);
  --dropzone-hover-bg: rgba(59, 130, 246, 0.06);
}

:root.light-theme {
  /* Light Theme - High Visibility */
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-border: rgba(15, 23, 42, 0.15);
  --text-main: #0f172a;
  --text-muted: #475569;
  --input-bg: rgba(255, 255, 255, 0.95);
  --input-border: rgba(15, 23, 42, 0.2);
  --input-text: #0f172a;
  --response-bg: rgba(255, 255, 255, 0.9);
  --response-border: rgba(15, 23, 42, 0.12);
  --response-text: #1e293b;
  --heading-color: #0f172a;
  --nav-bg: rgba(255, 255, 255, 0.95);
  --footer-bg: rgba(241, 245, 249, 0.95);
  --accent-strong: #1d4ed8;
  --code-bg: #f1f5f9;
  --code-text: #059669;
  --progress-bg: rgba(226, 232, 240, 0.9);
  --dropzone-hover-bg: rgba(59, 130, 246, 0.04);
}

/* ==========================================
   GLOBAL BRANDING & GENERAL THEME ELEMENTS
   ========================================== */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--heading-color);
  transition: color 0.3s ease;
}

/* ==========================================
   GLASSMORPHISM CARD STYLING
   ========================================== */
.card {
  background: var(--card-bg) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border) !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15) !important;
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* ==========================================
   INPUTS & TEXTAREAS
   ========================================== */
.form-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
}

textarea.form-control {
  background: var(--input-bg) !important;
  border: 1px solid var(--input-border) !important;
  color: var(--input-text) !important;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 1rem;
}

textarea.form-control::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

textarea.form-control:focus {
  background: var(--input-bg) !important;
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25) !important;
  outline: none;
}

/* ==========================================
   BUTTONS WITH MICRO-ANIMATIONS
   ========================================== */
.btn {
  border-radius: 10px;
  font-weight: 500;
  padding: 0.6rem 1.5rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  border: none;
  color: #ffffff !important;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #60a5fa 0%, #2563eb 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.4);
}

.btn-outline-primary {
  border: 1.5px solid rgba(59, 130, 246, 0.6);
  color: var(--accent-strong) !important;
  background: transparent;
}

.btn-outline-primary:hover:not(:disabled) {
  background: rgba(59, 130, 246, 0.15);
  border-color: #60a5fa;
  color: var(--text-main) !important;
  transform: translateY(-2px);
}

.btn-outline-danger {
  border: 1.5px solid rgba(239, 68, 68, 0.6);
  color: #ef4444;
  background: transparent;
}

.btn-outline-danger:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.15);
  border-color: #f87171;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(239, 68, 68, 0.25);
}

/* ==========================================
   DRAG & DROP FILE ZONE
   ========================================== */
#dropZone {
  background: var(--input-bg) !important;
  border: 2px dashed var(--input-border) !important;
  border-radius: 16px;
  padding: 2rem !important;
  transition: all 0.3s ease;
  cursor: pointer;
}

#dropZone:hover {
  border-color: #60a5fa !important;
  background: var(--dropzone-hover-bg) !important;
  transform: scale(1.01);
}

#dropZone p {
  color: var(--text-muted) !important;
}

#fileInput {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-main);
  border-radius: 8px;
}

/* ==========================================
   RESPONSE BOX STYLING
   ========================================== */
#responseBox {
  background: var(--response-bg) !important;
  border: 1px solid var(--response-border) !important;
  border-radius: 12px;
  padding: 1.5rem;
  overflow-wrap: break-word;
  white-space: normal;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--response-text);
  box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.08);
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

#responseBox h2,
#responseBox h3,
#responseBox h4 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--heading-color);
  font-weight: 600;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.3rem;
}

#responseBox strong {
  color: var(--accent-strong) !important;
  font-weight: 600;
}

#responseBox ul {
  margin-left: 1rem;
  padding-left: 1rem;
  margin-bottom: 1rem;
}

#responseBox li {
  margin-bottom: 0.5rem;
}

#responseBox pre {
  background: var(--code-bg) !important;
  border: 1px solid var(--input-border) !important;
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  overflow-x: auto;
}

#responseBox code {
  background: var(--code-bg);
  color: var(--code-text) !important;
  font-family: "Fira Code", Consolas, Monaco, "Andale Mono", monospace;
  font-size: 0.9rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

#responseBox pre code {
  padding: 0;
  background: transparent;
}

/* ==========================================
   NAVIGATION & FOOTER (THEME AWARE)
   ========================================== */
.navbar {
  background: var(--nav-bg) !important;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--card-border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main) !important;
}

.navbar .nav-link {
  color: var(--text-muted) !important;
  transition: color 0.3s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--text-main) !important;
}

footer {
  background: var(--footer-bg) !important;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted) !important;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* ==========================================
   PROGRESS BAR
   ========================================== */
.progress {
  background-color: var(--progress-bg) !important;
  border-radius: 8px;
}

/* ==========================================
   THEME TOGGLE BUTTON
   ========================================== */
#themeToggleBtn {
  border: 1px solid var(--card-border) !important;
  color: var(--text-main) !important;
  background: transparent !important;
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

#themeToggleBtn:hover {
  background: rgba(128, 128, 128, 0.1) !important;
  border-color: var(--text-main) !important;
  transform: translateY(-1px);
}

/* ==========================================
   CHAT CONVERSATION UI
   ========================================== */
.chat-container {
  background: var(--response-bg);
  border: 1px solid var(--response-border);
  border-radius: 16px;
  height: 450px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  scroll-behavior: smooth;
  position: relative;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.3);
  border-radius: 3px;
}
.chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.5);
}

/* Chat bubble base */
.chat-bubble {
  max-width: 80%;
  padding: 0.85rem 1.1rem;
  border-radius: 16px;
  font-size: 0.95rem;
  line-height: 1.65;
  word-wrap: break-word;
  overflow-wrap: break-word;
  animation: bubbleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

@keyframes bubbleIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* User bubble — right aligned */
.chat-bubble.user {
  align-self: flex-end;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: #ffffff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

/* Assistant bubble — left aligned */
.chat-bubble.assistant {
  align-self: flex-start;
  background: var(--card-bg);
  color: var(--response-text);
  border: 1px solid var(--card-border);
  border-bottom-left-radius: 4px;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Bubble role labels */
.chat-bubble .bubble-role {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
  opacity: 0.7;
}

.chat-bubble.user .bubble-role {
  color: rgba(255, 255, 255, 0.8);
}

.chat-bubble.assistant .bubble-role {
  color: var(--accent-strong);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.5rem 0;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-strong);
  animation: typingDot 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingDot {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

/* Welcome state */
.chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  opacity: 0.6;
}

.chat-welcome .welcome-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Markdown rendering inside assistant bubbles */
.chat-bubble.assistant h2,
.chat-bubble.assistant h3,
.chat-bubble.assistant h4 {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  color: var(--heading-color);
  font-weight: 600;
  font-size: 1.05rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.2rem;
}

.chat-bubble.assistant strong {
  color: var(--accent-strong) !important;
  font-weight: 600;
}

.chat-bubble.assistant code {
  background: var(--code-bg);
  color: var(--code-text) !important;
  font-family: "Fira Code", Consolas, Monaco, monospace;
  font-size: 0.85rem;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

.chat-bubble.assistant a {
  color: var(--accent-strong);
  text-decoration: underline;
}

/* Error bubble */
.chat-bubble.error {
  align-self: flex-start;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  border-bottom-left-radius: 4px;
}

.light-theme .chat-bubble.error {
  background: rgba(239, 68, 68, 0.08);
  color: #dc2626;
}

/* Timestamp on bubbles */
.bubble-time {
  font-size: 0.65rem;
  opacity: 0.5;
  margin-top: 0.35rem;
  text-align: right;
}

/* ==========================================
   SIDEBAR LAYOUT & TRANSITIONS
   ========================================== */
#wrapper {
  display: flex;
  width: 100%;
  align-items: stretch;
  overflow-x: hidden;
  min-height: calc(100vh - 120px);
}

#sidebar-wrapper {
  min-width: 280px;
  max-width: 280px;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--card-border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

/* Sidebar toggled state (collapsed) */
#wrapper.toggled #sidebar-wrapper {
  margin-left: -280px;
}

#page-content-wrapper {
  width: 100%;
  flex: 1;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.scrollable-sidebar {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

/* Scrollbar for sidebar */
.scrollable-sidebar::-webkit-scrollbar {
  width: 4px;
}
.scrollable-sidebar::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.2);
  border-radius: 2px;
}

/* Saved session list items */
.saved-session-item {
  background: transparent !important;
  color: var(--text-main) !important;
  border: 1px solid transparent !important;
  border-radius: 8px !important;
  margin-bottom: 0.25rem !important;
  padding: 0.75rem 1rem !important;
  transition: all 0.2s ease;
  cursor: pointer;
}

.saved-session-item:hover {
  background: rgba(255, 255, 255, 0.05) !important;
  border-color: var(--card-border) !important;
}

.light-theme .saved-session-item:hover {
  background: rgba(15, 23, 42, 0.04) !important;
}

.saved-session-item.active {
  background: rgba(59, 130, 246, 0.15) !important;
  border-color: rgba(59, 130, 246, 0.3) !important;
  color: var(--accent-strong) !important;
}

.saved-session-item .session-title {
  font-size: 0.9rem;
  font-weight: 500;
  max-width: 180px;
  display: inline-block;
}

.saved-session-item .delete-session-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  opacity: 0.5;
  transition: all 0.2s ease;
  padding: 2px 6px;
  border-radius: 4px;
}

.saved-session-item .delete-session-btn:hover {
  opacity: 1;
  color: #ef4444 !important;
  background: rgba(239, 68, 68, 0.1);
}

/* Sidebar Toggle button on the content page */
#sidebarToggle {
  border: 1px solid var(--card-border);
  color: var(--text-main);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.2s ease;
}

#sidebarToggle:hover {
  background: rgba(128, 128, 128, 0.1);
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  #sidebar-wrapper {
    margin-left: -280px;
    position: absolute;
    height: 100%;
    z-index: 1000;
  }
  #wrapper.toggled #sidebar-wrapper {
    margin-left: 0;
  }
}

/* ==========================================
   STREAMING ANIMATION & CURSOR
   ========================================== */
.streaming-cursor {
  display: inline-block;
  width: 7px;
  height: 15px;
  background-color: var(--accent-strong);
  margin-left: 3px;
  vertical-align: middle;
  border-radius: 2px;
  animation: cursorPulse 0.8s infinite ease-in-out;
}

@keyframes cursorPulse {
  0%, 100% {
    opacity: 1;
    transform: scaleY(1);
  }
  50% {
    opacity: 0.15;
    transform: scaleY(0.8);
  }
}

/* ==========================================
   CODE BLOCKS WITH HEADER & COPY BUTTON
   ========================================== */
.code-block-wrapper {
  position: relative;
  margin: 1rem 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--input-border);
  background: var(--code-bg);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid var(--input-border);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.light-theme .code-header {
  background: rgba(0, 0, 0, 0.03);
}

.copy-code-btn {
  background: transparent;
  border: 1px solid var(--input-border);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  border-color: var(--accent-strong);
}

.copy-code-btn.copied {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
  border-color: #10b981;
}

.code-block-wrapper pre {
  margin: 0 !important;
  padding: 1rem !important;
  background: transparent !important;
  border: none !important;
  overflow-x: auto;
}

.code-block-wrapper pre code {
  font-family: "Fira Code", Consolas, Monaco, monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--code-text);
  background: transparent !important;
  padding: 0 !important;
}

/* ==========================================
   STOP GENERATING BUTTON
   ========================================== */
.btn-stop {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
  border: none !important;
  color: #ffffff !important;
  animation: pulseStop 2s infinite ease-in-out;
}

.btn-stop:hover {
  background: linear-gradient(135deg, #f87171 0%, #b91c1c 100%) !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(239, 68, 68, 0.4);
}

@keyframes pulseStop {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
  }
}

/* Tables inside chat bubbles */
.chat-bubble.assistant table {
  width: 100%;
  margin: 1rem 0;
  border-collapse: collapse;
  font-size: 0.9rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--card-border);
}

.chat-bubble.assistant table th,
.chat-bubble.assistant table td {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--card-border);
  text-align: left;
}

.chat-bubble.assistant table th {
  background: rgba(255, 255, 255, 0.07);
  font-weight: 600;
  color: var(--heading-color);
}

.light-theme .chat-bubble.assistant table th {
  background: rgba(0, 0, 0, 0.05);
}

.chat-bubble.assistant table tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.light-theme .chat-bubble.assistant table tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

/* Blockquotes */
.chat-bubble.assistant blockquote {
  border-left: 3px solid var(--accent-strong);
  padding-left: 0.8rem;
  margin: 0.8rem 0;
  color: var(--text-muted);
  font-style: italic;
}