/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

/* CSS Variables for theming */
:root {
  --bg-gradient: linear-gradient(135deg, #0f172a, #123456, #1e3a8a, #3b82f6);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --bg-primary: rgba(30, 41, 59, 0.55);
  --bg-secondary: rgba(15, 23, 42, 0.8);
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);
  --user-bg: #3b82f6;
  --ai-bg: rgba(51, 65, 85, 0.8);
  --input-bg: rgba(30, 41, 59, 0.8);
  --button-bg: #3b82f6;
  --button-hover: #2563eb;
  --error-color: #ef4444;
  --success-color: #10b981;
}

[data-theme="light"] {
  --bg-gradient: linear-gradient(135deg, #f8fafc, #e2e8f0, #cbd5e1, #94a3b8);
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --bg-primary: rgba(255, 255, 255, 0.9);
  --bg-secondary: rgba(248, 250, 252, 0.95);
  --border-color: rgba(0, 0, 0, 0.1);
  --shadow: rgba(0, 0, 0, 0.1);
  --user-bg: #3b82f6;
  --ai-bg: rgba(241, 245, 249, 0.9);
  --input-bg: rgba(255, 255, 255, 0.9);
  --button-bg: #3b82f6;
  --button-hover: #2563eb;
  --error-color: #dc2626;
  --success-color: #059669;
}

[data-theme="light"] h1 {
  background: none;
  color: #1e293b;
  -webkit-background-clip: unset;
  background-clip: unset;
}

[data-theme="light"] .control-btn {
  background: rgba(0, 0, 0, 0.08);
  color: #374151;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .control-btn:hover {
  background: rgba(0, 0, 0, 0.12);
  color: #1f2937;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .divider {
  background: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .dropdown-menu {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .dropdown-item {
  color: #374151;
}

[data-theme="light"] .dropdown-item:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #1f2937;
}

body {
  background: var(--bg-gradient);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

/* Background Animation */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  position: relative;
  z-index: 10000;
  padding: 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  margin-bottom: 1rem;
  box-shadow: 0 8px 20px var(--shadow);
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.title-section {
  text-align: center;
  flex: 1;
}

.header-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.control-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 10px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.btn-icon,
.theme-icon {
  font-size: 1.2rem;
  display: flex;
  align-items: center;
}

.divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  margin: 0 0.5rem;
}

/* Dropdown Menu */
.dropdown-container {
  position: relative;
  z-index: 1001; /* Ensure container is above other elements */
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.5rem;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 9999; /* Much higher z-index to ensure it's always on top */
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  width: 100%;
  background: none;
  border: none;
  padding: 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.dropdown-item:hover {
  background: var(--border-color);
}

.dropdown-icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

.dropdown-text {
  font-weight: 500;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0.3rem;
  background: linear-gradient(90deg, #38bdf8, #6366f1, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Chat Container */
.chat-container {
  flex-grow: 1;
  background: var(--bg-secondary);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
}

.chat-messages {
  flex-grow: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-behavior: smooth;
}

.message {
  display: flex;
  gap: 1rem;
  align-items: flex-start; /* This is the key */
  animation: fadeIn 0.3s ease;
  max-width: 100%;
  overflow-x: hidden;
}

/* Animated Gradient for AI Messages */
@keyframes bubbleGradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* AI Message Styling */
.message-content.ai-message {
  background: linear-gradient(135deg, #38bdf8, #6366f1, #a855f7);
  background-size: 300% 300%;
  animation: bubbleGradient 6s ease infinite;
  color: white;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
  border: none;
  text-wrap: wrap;
}

/* User Message Styling */
.user-message .message-content {
  background: rgba(99, 102, 241, 0.2);
  color: #f1f5f9;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: none;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.user-avatar {
  background: linear-gradient(135deg, #f43f5e, #ec4899);
}

.message-content {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.85rem 1rem;
  border-radius: 12px;
  line-height: 1.5;
  font-size: 0.98rem;
  border: 1px solid rgba(255, 255, 255, 0.05);

  /* FIXES */
  word-break: normal;
  overflow-wrap: anywhere; /* Keeps code and text wrapped */
  max-width: 100%;
}

.user-message .message-content {
  background: rgba(99, 102, 241, 0.2);
}

/* Formatted Content Styles */
.message-content p {
  margin-bottom: 0.8rem;
}

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

.message-content strong {
  font-weight: 600;
  color: #ffffff;
}

.message-content ul,
.message-content ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.message-content li {
  margin-bottom: 0.3rem;
  line-height: 1.4;
}

.message-content code {
  background: rgba(0, 0, 0, 0.3);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
  color: #fbbf24;
}
.message-content pre {
  background: rgba(0, 0, 0, 0.4);
  padding: 1rem;
  border-radius: 8px;
  margin: 0.5rem 0;
  overflow-x: auto; /* allows horizontal scroll */
  border-left: 4px solid #38bdf8;
  white-space: pre-wrap; /* preserve whitespace but allow wrapping if needed */
  tab-size: 4; /* set tab size for better indentation display */
  word-break: keep-all; /* don't break words */
}

.message-content pre code {
  background: none;
  padding: 0;
  color: #e2e8f0;
  font-size: 0.85rem;
  line-height: 1.4;
  white-space: pre-wrap; /* preserve exact whitespace but allow wrapping */
  font-family: "Consolas", "Monaco", "Courier New", monospace; /* better monospace font */
  display: block; /* ensure proper block display */
}

/* copy code area */
.code-block-container {
  position: relative;
  margin-top: 0.5rem;
}

.copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  padding: 0.5rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  opacity: 1;
  transition: transform 0.2s ease;
  backdrop-filter: blur(5px);
}

.copy-button:hover {
  transform: scale(1.05);
}

/* Input Area */
.input-container {
  padding: 1rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.input-form {
  display: flex;
  gap: 1rem;
  align-items: flex-end; /* Keep buttons at the bottom when textarea grows */
}

textarea {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(26, 32, 44, 0.8);
  color: #f1f5f9;
  font-size: 1rem;
  resize: none;
  min-height: 50px;
  max-height: 150px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

textarea:focus {
  outline: none;
  border-color: #38bdf8;
  background: rgba(26, 32, 44, 0.95);
}

button {
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.3s ease;
  font-weight: 500;
}

/* Voice Button */
.voice-button {
  position: relative;
  padding: 0;
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  overflow: hidden;
}

.voice-button::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.voice-button:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.voice-button:hover::before {
  opacity: 1;
}

.voice-button:active {
  transform: translateY(-1px) scale(1.02);
}

.voice-button.recording {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
  animation: recordingPulse 1.5s infinite;
}

.voice-button.recording::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(239, 68, 68, 0.3) 0%,
    transparent 70%
  );
  animation: ripple 1.5s infinite;
}

.voice-button.recording:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 20px rgba(239, 68, 68, 0.5);
}

.voice-icon {
  width: 20px;
  height: 20px;
  color: white;
  z-index: 1;
  transition: all 0.3s ease;
}

.voice-button:hover .voice-icon {
  transform: scale(1.1);
}

@keyframes recordingPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}

@keyframes ripple {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

button:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #2563eb, #7c3aed);
}

button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  color: #94a3b8;
  align-items: center;
}

.dot {
  width: 8px;
  height: 8px;
  background: #38bdf8;
  border-radius: 50%;
  animation: bounce 1.4s infinite;
}

.dot:nth-child(2) {
  animation-delay: 0.2s;
}
.dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}

/* Fade In Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile Responsive */
@media (max-width: 640px) {
  .container {
    padding: 0.5rem;
  }
  header {
    padding: 1rem;
  }
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  .chat-messages {
    padding: 1rem;
  }
  .message-content {
    font-size: 0.95rem;
  }
  .message {
    flex-direction: column;
    gap: 0.5rem;
  }
  .message-wrapper {
    align-self: stretch;
  }
}

/* New Styles for Enhanced Features */

/* Message Wrapper */
.message-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

/* Timestamp Styles */
.message-timestamp {
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.7;
  margin-left: 0.5rem;
  font-style: italic;
}

/* Copy Message Button */
.copy-message-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.8rem;
  opacity: 0.7;
  transition: all 0.2s ease;
  margin-left: 0.5rem;
}

.copy-message-btn:hover {
  opacity: 1;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.copy-message-btn.copied {
  color: var(--success-color);
  opacity: 1;
}

/* Message Header */
.message-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.2rem;
}

/* Streaming Text Effect */
.streaming-text {
  position: relative;
}

.streaming-text::after {
  content: "|";
  animation: blink 1s infinite;
  color: var(--text-primary);
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

/* Update existing message styles to work with variables */
.message-content {
  background: var(--ai-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.user-message .message-content {
  background: var(--user-bg);
  color: white;
}

/* Input styles update */
textarea {
  background: var(--input-bg) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
}

button[type="submit"] {
  background: var(--button-bg) !important;
}

button[type="submit"]:hover {
  background: var(--button-hover) !important;
}

/* Theme transition */
* {
  transition: background-color 0.3s ease, color 0.3s ease,
    border-color 0.3s ease;
}

/* Chat History Sidebar */
.chat-history-sidebar {
  position: fixed;
  top: 0;
  left: -350px;
  width: 350px;
  height: 100vh;
  background: var(--bg-secondary);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  z-index: 15000;
  transition: left 0.3s ease;
  display: flex;
  flex-direction: column;
}

.chat-history-sidebar.open {
  left: 0;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: 1.2rem;
}

.close-sidebar {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
}

.close-sidebar:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

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

.chat-sessions-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.chat-session-item {
  padding: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.chat-session-item:hover {
  background: var(--border-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.chat-session-item.active {
  border-color: var(--button-bg);
  background: rgba(59, 130, 246, 0.1);
}

.chat-session-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-session-preview {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-session-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.chat-session-date {
  opacity: 0.8;
}

.chat-session-delete {
  background: none;
  border: none;
  color: var(--error-color);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  opacity: 0;
  transition: all 0.3s ease;
}

.chat-session-item:hover .chat-session-delete {
  opacity: 1;
}

.chat-session-delete:hover {
  background: rgba(220, 38, 38, 0.1);
}

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 14000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.sidebar-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* New Chat and Chat History buttons */
.new-chat,
.chat-history {
  background: var(--button-bg);
  border: none;
  padding: 0.75rem;
  border-radius: 0.75rem;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.new-chat:hover,
.chat-history:hover {
  background: var(--button-hover);
  transform: translateY(-2px);
}

/* Empty state */
.chat-sessions-empty {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.chat-sessions-empty h4 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .chat-history-sidebar {
    width: 90vw;
    left: -90vw;
  }

  .header-controls {
    gap: 0.4rem;
  }

  .control-btn {
    width: 40px;
    height: 40px;
  }

  .btn-icon,
  .theme-icon {
    font-size: 1.1rem;
  }

  .dropdown-menu {
    min-width: 180px;
    right: -10px;
  }

  /* Make delete buttons always visible on mobile */
  .chat-session-delete {
    opacity: 1;
  }
}

@media (max-width: 480px) {
  .control-btn {
    width: 38px;
    height: 38px;
  }

  .btn-icon,
  .theme-icon {
    font-size: 1rem;
  }

  .header-controls {
    gap: 0.3rem;
  }

  .dropdown-menu {
    min-width: 160px;
    right: 0;
    left: auto;
    /* Ensure dropdown stays within viewport */
    max-width: calc(100vw - 40px);
  }

  /* Adjust dropdown position if it would overflow */
  .dropdown-container:last-child .dropdown-menu {
    right: 0;
    left: auto;
  }
}

/* For very narrow screens, make dropdown full width */
@media (max-width: 380px) {
  .dropdown-menu {
    right: 0;
    left: 0;
    min-width: unset;
    width: calc(100vw - 32px);
    margin: 0 16px;
  }
}

/* End of styles */