@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Modern Theme */
:root {
    /* Modern Color Palette */
    --primary-bg: #0a0b0f;              /* Deep dark background */
    --secondary-bg: #111219;            /* Slightly lighter dark */
    --card-bg: rgba(17, 18, 25, 0.8);   /* Semi-transparent cards */
    --accent-primary: #6366f1;          /* Indigo primary */
    --accent-secondary: #8b5cf6;        /* Purple secondary */
    --accent-tertiary: #06b6d4;         /* Cyan accent */
    --accent-quaternary: #f59e0b;       /* Amber accent */
    --text-primary: #f8fafc;            /* Light text */
    --text-secondary: #cbd5e1;          /* Muted text */
    --text-muted: #64748b;              /* Very muted text */
    --white: #ffffff;
    --success: #10b981;
    --error: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --gradient-secondary: linear-gradient(135deg, var(--accent-tertiary), var(--accent-quaternary));
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Font Sizes */
    --font-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --font-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --font-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
    --font-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
    --font-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --font-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.5rem);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 50px rgba(99, 102, 241, 0.3);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Animations */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-primary);
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

.container {
  height: 100vh;
  width: 100vw;
  background: var(--primary-bg);
  background-size: cover;
  animation: color 12s ease-in-out infinite;
  position: relative;
}

.welcome {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-3xl);
  font-weight: var(--font-weight-semibold);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  z-index: 10;
}

.welcomes {
  position: static;
  display: flex;
  justify-content: center;
  gap: 5px;
  margin-bottom: var(--space-md);
}

.welcomes span {
  opacity: 0; 
  display: inline-block;
  animation: revealText 4s steps(5) forwards; 
  animation-delay: 0s;
}

.welcomes span:nth-child(1) {
  animation-delay: 0.5s;
}

.welcomes span:nth-child(2) {
  animation-delay: 1s;
}

.welcomes span:nth-child(3) {
  animation-delay: 1.5s;
}

.welcomes span:nth-child(4) {
  animation-delay: 2s;
}

.welcomes span:nth-child(5) {
  animation-delay: 2.5s;
}

.welcome p1 {
  font-size: var(--font-base);
  color: var(--text-secondary);
}

@media (max-width: 991px) {
  .welcome {
    font-size: var(--font-2xl);
  }
}

@media (max-width: 767px) {
  .welcome {
    font-size: var(--font-xl);
  }
}

@media (max-width: 575px) {
  .welcome {
    font-size: var(--font-lg);
  }
}

/* Chatbot container */
.chatbot {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: calc(100% - 250px);
  background: var(--secondary-bg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.7);
  transition: all var(--transition-base);
  z-index: 10;
  max-width: 95%;
}

body.show-chatbot .chatbot {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.chatbot header {
  background: transparent;
  color: var(--text-primary);
  padding: var(--space-md);
  text-align: center;
  position: relative;
  flex-shrink: 0;
}

.chatbot header h2 {
  font-size: var(--font-2xl);
  font-weight: var(--font-weight-bold);
}

.chatbot header .close-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--font-xl);
}

/* Chatbox */
.chatbox {
  flex-grow: 1;
  overflow-y: auto;
  padding: var(--space-lg);
  background-color: var(--secondary-bg);
}

.chatbox .chat {
  display: flex;
  list-style: none;
  margin: var(--space-sm) 0;
}

.chatbox .outgoing {
  justify-content: flex-end;
  position: relative;
}

.chatbox .outgoing p {
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--space-sm);
  border-radius: var(--radius-xl) var(--radius-xl) var(--radius-sm) var(--radius-xl);
  position: relative;
  left: -17%;
  max-width: 80%;
  font-size: var(--font-base);
  border: none;
  box-shadow: var(--shadow-sm);
}

.chatbox .incoming p {
   background: var(--gradient-primary);
  color: var(--white);
  padding: var(--space-sm);
  border-radius: var(--radius-xl) var(--radius-xl) var(--radius-xl) var(--radius-sm);
  max-width: 80%;
  font-size: var(--font-base);
  border: none;
  box-shadow: var(--shadow-sm);
}

.chatbox .incoming .bot-message-container p {
  flex: 1;
  min-width: 100%;
  word-break: break-word;
  white-space: pre-wrap;
}

.bot-message-container {
  display: flex;
  flex-direction: column;
  max-width: 80%;
  background: transparent;
  padding: 0;
  margin: 0;
  border: none;
  position: relative;
}

.chat.incoming {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  position: relative;
  padding-bottom: var(--space-lg);
}

.chatbox .incoming {
  justify-content: flex-start;
}

/* Chat input */
.chat-input {
  padding: var(--space-sm) var(--space-lg);
  background: var(--card-bg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-input textarea {
  width: 100%;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: var(--font-base);
  resize: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: border-color var(--transition-fast);
}

.chat-input textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.chat-input span {
  font-size: var(--font-xl);
  color: var(--accent-primary);
  cursor: pointer;
  visibility: hidden;
}

.chat-input textarea:valid ~ span {
  visibility: visible;
}

/* Sidebar for search history */
.history-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 250px;
  height: 100vh;
  background-color: var(--secondary-bg);
  color: var(--text-primary);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  display: none;
  z-index: 10;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--secondary-bg) var(--secondary-bg);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

button.chatbot-toggler {
  color: #000;
}

.history-sidebar::-webkit-scrollbar {
  width: 1px;
}

.history-sidebar::-webkit-scrollbar-thumb {
  background-color: var(--secondary-bg);
  border-radius: 1px;
}

.history-sidebar::-webkit-scrollbar-track {
  background: var(--secondary-bg);
}

.history-sidebar h3 {
  font-size: var(--font-lg);
  font-weight: var(--font-weight-semibold);
  padding-bottom: var(--space-sm);
  color: var(--text-primary);
}

.history-list {
  list-style: none;
  padding: 0;
}

.history-list li {
  padding: var(--space-sm);
  background-color: var(--card-bg);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xs);
  font-size: var(--font-sm);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
}

.history-list li:hover {
  background-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-2px);
}

.delete-icon {
  cursor: pointer;
  margin-left: var(--space-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.delete-icon:hover {
  color: var(--error);
}

/* Show sidebar when active */
body.show-history .history-sidebar {
  display: block;
}

body.show-history .chatbot {
  width: calc(100% - 250px);
}

/* Delete All Button */
.delete-all-btn {
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background: none;
  border: none;
  padding: var(--space-sm);
  font-size: var(--font-base);
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: color var(--transition-fast);
  margin-top: var(--space-md);
  border-radius: var(--radius-md);
}

.delete-all-btn:hover {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error);
}

.delete-all-btn .material-icons {
  margin-right: var(--space-xs);
}

/* Start Chat Button */
.start-chat-btn {
  background: var(--gradient-primary);
  color: var(--white);
  font-size: var(--font-base);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  margin-top: var(--space-lg);
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
  box-shadow: var(--shadow-md);
}

.start-chat-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Responsive adjustments */
@media (max-width: 767px) {
  .history-sidebar {
    width: 200px;
    padding: var(--space-sm);
  }

  body.show-history .chatbot {
    width: calc(100% - 200px);
  }

  .chatbot header h2 {
    font-size: var(--font-lg);
  }

  .chatbox .chat p {
    font-size: var(--font-sm);
  }

  .chat-input textarea {
    font-size: var(--font-sm);
  }
  
}

@media (max-width: 575px) {
  .history-sidebar {
    width: 180px;
  }

  body.show-history .chatbot {
    width: calc(100% - 180px);
  }

  .chatbox .chat p {
    font-size: var(--font-xs);
  }

  .chat-input textarea {
    font-size: var(--font-xs);
  }
}

/* Mobile view fixes */
@media (max-width: 480px) {
  .chatbot {
    width: 100% !important;
    right: 0;
    left: 0;
    border-radius: 0;
    max-width: 100% !important;
  }

  body.show-history .chatbot {
    width: 100% !important;
    transform: none;
  }

  .container {
    overflow: hidden;
    width: 100%;
  }

  /* Outgoing (user) messages to the right */
  .chatbox .outgoing p {
    position: relative;
    left: auto;                 /* reset any desktop offset */
    margin-left: auto;          /* push to right edge */
    margin-right: 8px;          /* small right gap */
    max-width: 85%;
  }

  /* Incoming (bot) messages to the left */
  .chatbox .incoming,
  .chat-incoming {
    display: flex;
    justify-content: flex-start;
    margin-left: 0 !important; /* no wrapper gap */
    padding-left: 0 !important;
    left: -20px;
  }

  .chatbox .incoming p,
  .chat-incoming p {
    display: flex;
    left: -20px;
    margin-left: 0 !important; /* no bubble gap */
          /* small inner padding so text isn’t glued to edge */
    max-width: 85%;            /* control width on mobile */
    border-radius: var(--radius-xl) var(--radius-xl) var(--radius-xl) var(--radius-sm);
  }

  .chat-input {
    padding: 10px;
    width: 100%;
    left: 0 !important;
    gap: 8px;
  }

  .chat-input textarea {
    width: 100%;
  }

  #close-chatbot {
    position: absolute;
    right: 15px;
    left: auto;
  }

  /* History sidebar for mobile */
  .history-sidebar {
    width: 85% !important;
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1001;
    display: block !important;
  }

  body.show-history .history-sidebar {
    transform: translateX(0);
  }

  body.show-history .chatbot {
    transform: translateX(0);
  }

  /* Ensure the background color is consistent */
  .chatbot,
  .chatbox,
  .chat-input {
    background: var(--secondary-bg);
  }

  body.light-mode .chatbot,
  body.light-mode .chatbox,
  body.light-mode .chat-input {
    background: var(--secondary-bg);
  }
}


/* Remove conflicting styles */
@media (max-width: 480px) {
  .history-sidebar {
    width: 100% !important;
    height: 100% !important;
    position: fixed !important;
  }
  
  .chatbot {
    left: 0 !important;
    width: 100% !important;
  }
  
  .chat-input {
    left: 0 !important;
    padding: 10px !important;
  }
}

@keyframes revealText {
  0% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  75% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

/* Light Mode Styles */
body.light-mode {
  --primary-bg: #f8fafc;
  --secondary-bg: #ffffff;
  --card-bg: rgba(255, 255, 255, 0.8);
  --text-primary: #1e293b;     /* dark text */
  --text-secondary: #475569;
  --text-muted: #94a3b8;
}

body.light-mode .container {
  background-color: var(--primary-bg);
}

body.light-mode .chatbot {
  background-color: var(--secondary-bg);
  border-radius: none;
  box-shadow: none;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .chatbox {
  background-color: var(--secondary-bg);
}

body.light-mode .chat-input {
  background-color: var(--secondary-bg);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .chatbox .outgoing p {
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
}

body.light-mode .chatbox .incoming p {
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
}

body.light-mode .chat-input textarea {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .chatbot header {
  background-color: var(--secondary-bg);
  color: var(--text-primary);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .chatbot header .close-btn {
  color: var(--text-primary);
}

body.light-mode .history-sidebar {
  background-color: var(--secondary-bg);
  border-right: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .history-sidebar h3 {
  color: var(--text-primary);
}

body.light-mode .history-list li {
  background: white;
  color: black;
  border: 1.7px solid rgba(0, 0, 0, 0.1);
  font-weight: 400;
}

body.light-mode .history-list li:hover {
  background-color: rgba(99, 102, 241, 0.1);
}

body.light-mode .delete-icon {
  color: var(--text-secondary);
}

body.light-mode .delete-all-btn {
  color: var(--text-primary);
}

/* 🔹 All Material icons (including robot icons) dark in light mode */
body.light-mode .material-symbols-outlined,
body.light-mode .material-icons,
body.light-mode .robot-icon {
  color: var(--text-primary) !important;
}

body.light-mode #mode-toggle {
  color: var(--text-primary) !important;
}

body.light-mode #mic-btn,
body.light-mode .chat-input span {
  color: var(--text-primary) !important;
}

body.light-mode .speak-btn {
  color: var(--text-primary) !important;
}

#mode-toggle {
  position: absolute;
  top: 10px;
  left: 50px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-xl);
  color: var(--text-primary);
  padding: 5px;
  z-index: 100;
  transition: color var(--transition-fast);
}

#mic-btn {
  font-size: var(--font-xl);
  color: var(--accent-primary);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

#mic-btn.listening {
  color: var(--error);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}
/* Hide or visually disable the sidebar toggle in light mode */
body.light-mode #sidebar-toggle {

  opacity: 0;           /* make it look disabled */
  pointer-events: none;   /* actually disable clicking */
  cursor: default;        /* cursor no longer pointer */
}
@media (max-width: 480px) {
body.light-mode #sidebar-toggle {
    opacity: 1;
    pointer-events: auto;
  }
}

.chat-input {
  display: flex;
  align-items: center;
  padding: var(--space-sm);
  background-color: transparent;
  gap: var(--space-xs);
}

.chat-input textarea {
  flex: 1;
  height: 60px;
  resize: none;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: var(--font-base);
}

.chat-input button,
.chat-input label {
  cursor: pointer;
  background: none;
  border: none;
  font-size: var(--font-xl);
  padding: 4px;
  color: var(--accent-primary);
  transition: all var(--transition-fast);
}

.chat-input button:hover,
.chat-input label:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.speak-btn {
  position: absolute;
  left: 5px;
  bottom: -25px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--font-xs);
  cursor: pointer;
  padding: 2px;
  transition: all var(--transition-fast);
  transform: scale(0.8);
}

.dots::after {
  content: '';
  display: inline-block;
  width: 1em;
  animation: dots 1s steps(3, end) infinite;
}

@keyframes dots {
  0% { content: ''; }
  33% { content: '.'; }
  66% { content: '..'; }
  100% { content: '...'; }
}
  

@media (max-width: 767px) {
  .welcomes {
    font-size: var(--font-2xl);
  }
}

@media (max-width: 480px) {
  .welcomes {
    font-size: var(--font-xl);
  }
}

/* Hide the menu button by default */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-2xl);
  cursor: pointer;
  margin-right: var(--space-sm);
  color: var(--text-primary);
}

/* Show menu button on mobile only */
@media (max-width: 480px) {
  .menu-toggle {
    display: block;
  }

  .history-sidebar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--secondary-bg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: 1000;
    padding: var(--space-lg);
    overflow-y: auto;
  }

  .history-sidebar.active {
    transform: translateX(0);
  }

  .container {
    width: 100%;
    height: 100vh;
    background: var(--primary-bg);
  }
  
  .chatbot {
    position: fixed;
    left: -10px;
    width: 100%;
    border-radius: none;
    box-shadow: none;
  }
  
  #close-chatbot {
    position: fixed;
    left: 95%;
  }
  
  .chat-input {
    display: flex;
    align-items: center;
    gap: 2px;
    width: 100%;
    position: relative;
    left: 20px;
    padding: 0;
    margin: 0;
  }
  
  .chat-input textarea {
    width: 100%;
  }
  
  .chatbox .outgoing p {
    position: relative;
    left: 0;
  }
}

.close-sidebar-btn {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-xl);
  color: var(--text-primary);
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  z-index: 100;
  cursor: pointer;
}

@media (max-width: 479px) {
  .close-sidebar-btn {
    display: block;
  }
}

/* Sidebar toggle button */
#sidebar-toggle {
  display: none;
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: var(--font-2xl);
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  z-index: 1001;
}

/* Theme toggle (dark/light) */
.theme-toggle {
  position: absolute;
  top: 16px;
  right: 46px;
  z-index: 1001;
}

/* Show sidebar toggle only on small screens */
@media (max-width: 480px) {
  #sidebar-toggle {
    display: block;
  }
}

body.light-mode #sidebar-toggle {
  color: var(--accent-primary);
  display: block;
}

.chatbot-toggler {
  display: none;
  height: 0%;
  background-color: var(--secondary-bg);
}

/* Hide close button on desktop */

/* Desktop view: sidebar always visible */
@media (min-width: 481px) {
  .history-sidebar {
    transform: translateX(0) !important; /* force open */
  }
  /* Hide close button on desktop */
  .history-sidebar #close-sidebar {
    display: none !important;
  }
}


.chatbot .material-symbols-outlined,
.chatbot .material-icons {
  color: #fff !important;
}