style.css

  /* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #f0f4f8, #d9e2ec);
  display: flex;
  min-height: 100vh;
  color: #333;
  overflow: hidden;
}

/* Sidebar styling */
.sidebar {
  width: 260px;
  background: linear-gradient(135deg, #ffffff, #e0f7fa);
  box-shadow: 2px 0 10px rgba(0,0,0,0.1);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  padding: 30px 20px;
  position: fixed;
  height: 100%;
  overflow-y: auto;
  transition: width 0.3s ease, background 0.3s ease;
}

.sidebar h2 {
  text-align: center;
  margin-bottom: 40px;
  font-family: 'Roboto', sans-serif;
  font-weight: 700;
  font-size: 1.8em;
  color: #00796B;
  background: linear-gradient(90deg, #00796B, #004D40);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar a {
  color: #555555;
  padding: 12px 15px;
  text-decoration: none;
  font-size: 1em;
  border-radius: 8px;
  margin-bottom: 10px;
  transition: background-color 0.3s, color 0.3s, transform 0.2s, box-shadow 0.3s;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #ffffff, #f9f9f9);
}

.sidebar a:hover {
  background: linear-gradient(135deg, #e0f7fa, #ffffff);
  color: #00796B;
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.sidebar a.active {
  background: linear-gradient(135deg, #80deea, #4dd0e1);
  color: #004d40;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.sidebar a::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: #004d40;
  border-radius: 50%;
  margin-right: 12px;
  opacity: 0;
  transition: opacity 0.3s;
}

.sidebar a.active::before {
  opacity: 1;
}

/* Main content styling */
.main-content {
  margin-left: 260px;
  padding: 30px;
  flex: 1;
  background: linear-gradient(135deg, #f9f9f9, #e0f2f1);
  overflow-y: auto;
  height: 100vh;
  transition: margin-left 0.3s ease, background 0.3s ease;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  background: linear-gradient(90deg, #80deea, #4dd0e1);
  padding: 15px 20px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.header h1 {
  font-family: 'Roboto', sans-serif;
  font-size: 2em;
  color: #ffffff;
  background: linear-gradient(90deg, #ffffff, #e0f7fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Card Styling */
.card {
  background: linear-gradient(135deg, #ffffff, #f1f8e9);
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  padding: 25px;
  margin-bottom: 25px;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 25px rgba(0,0,0,0.1);
  background: linear-gradient(135deg, #e0f7fa, #ffffff);
}

/* Button Styling */
button {
  background: linear-gradient(135deg, #00796B, #004D40);
  border: none;
  color: white;
  padding: 12px 20px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

button:hover {
  background: linear-gradient(135deg, #005D56, #00332E);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

button:disabled {
  background: linear-gradient(135deg, #A5D6A7, #81C784);
  cursor: not-allowed;
  box-shadow: none;
}

/* Select Dropdown Styling */
select {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid #cccccc;
  border-radius: 8px;
  font-size: 1em;
  background-color: #ffffff;
  transition: border-color 0.3s, box-shadow 0.3s;
  margin-bottom: 15px;
}

select:focus {
  border-color: #00796B;
  box-shadow: 0 0 5px rgba(0, 121, 107, 0.5);
  outline: none;
}

/* Chat Box Styling */
#chat-box {
  height: 400px;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  overflow-y: auto;
  padding: 20px;
  background-color: #ffffff;
  margin-bottom: 20px;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.message-container {
  margin-bottom: 20px;
  display: flex;
}

.message {
  padding: 12px 18px;
  border-radius: 20px;
  max-width: 75%;
  position: relative;
  word-wrap: break-word;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  font-size: 0.95em;
  line-height: 1.4;
  background-color: #f1f8e9;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.user .message {
  background: #DCF8C6;
  border-bottom-right-radius: 0;
}

.assistant .message {
  background: #e3f2fd;
  border-bottom-left-radius: 0;
}

/* Microphone Button Styling */
#mic-container {
  text-align: center;
  margin-top: 20px;
  margin-bottom: 20px;
}

/* Updated Start Button */
#start_button {
  background: linear-gradient(135deg, #00796B, #004D40);
  border: none;
  color: white;
  padding: 15px;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#start_button::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: rgba(255, 255, 255, 0.3);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  border-radius: 50%;
  transition: transform 0.5s ease-out;
}

#start_button:active::before {
  transform: translate(-50%, -50%) scale(1);
}

#start_button:disabled {
  background: linear-gradient(135deg, #A5D6A7, #81C784);
  cursor: not-allowed;
  box-shadow: none;
}

#start_button:hover:not(:disabled) {
  background: linear-gradient(135deg, #005D56, #00332E);
  transform: scale(1.05);
  box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

/* Icon Styling */
.mic-icon {
  width: 30px;
  height: 30px;
  transition: transform 0.3s;
  fill: #ffffff;
}

/* Animation for Mic Icon */
.mic-animate {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

/* Logs Styling */
#logs {
  height: 120px;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  overflow-y: auto;
  padding: 15px;
  background-color: #f1f1f1;
  font-size: 0.85em;
  margin-bottom: 10px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

#clear-logs {
  background: linear-gradient(135deg, #FF5252, #E53935);
  border: none;
  color: white;
  padding: 10px 18px;
  font-size: 0.9em;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#clear-logs:hover {
  background: linear-gradient(135deg, #E53935, #D32F2F);
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Chat Stats */
#chat-stats {
  font-size: 0.85em;
  color: #555555;
  text-align: center;
  margin-top: 10px;
}

/* Voice Selection Container */
#tts-voice-container label {
  display: block;
  margin-bottom: 8px;
  color: #555555;
  font-weight: 500;
}

/* Hidden Class */
.hidden {
  display: none;
}

/* Scrollbar Styling */
#chat-box::-webkit-scrollbar,
#logs::-webkit-scrollbar {
  width: 8px;
}

#chat-box::-webkit-scrollbar-track,
#logs::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

#chat-box::-webkit-scrollbar-thumb,
#logs::-webkit-scrollbar-thumb {
  background: #cccccc;
  border-radius: 4px;
}

#chat-box::-webkit-scrollbar-thumb:hover,
#logs::-webkit-scrollbar-thumb:hover {
  background: #a8a8a8;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .sidebar {
    width: 220px;
  }

  .main-content {
    margin-left: 220px;
  }
}

@media (max-width: 600px) {
  .sidebar {
    position: relative;
    width: 100%;
    height: auto;
    flex-direction: row;
    overflow-x: auto;
    padding: 15px 10px;
  }

  .sidebar h2 {
    display: none;
  }

  .sidebar a {
    margin-right: 10px;
    margin-bottom: 0;
    padding: 10px 12px;
    font-size: 0.9em;
  }

  .main-content {
    margin-left: 0;
    padding: 20px 15px;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header h1 {
    margin-bottom: 10px;
    font-size: 1.5em;
  }
}

/* Controls Container Styling */
#controls {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

/* Initialize Button Styling */
#download {
  flex: 0 0 auto;
  background: linear-gradient(135deg, #00796B, #004D40);
  border: none;
  color: white;
  padding: 10px 20px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#download:hover {
  background: linear-gradient(135deg, #005D56, #00332E);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#download:disabled {
  background: linear-gradient(135deg, #A5D6A7, #81C784);
  cursor: not-allowed;
  box-shadow: none;
}

/* Enhanced Layout for Digital Human Mentor Voice Section */
#voice .card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 20px;
}

/* Adjust controls and voice selection */
#model-selection-container,
#tts-voice-container {
  display: flex;
  flex-direction: column;
}

#model-selection-container label,
#tts-voice-container label {
  margin-bottom: 5px;
  font-weight: 500;
  color: #555555;
}

/* Chat and Controls Layout */
#chat-container {
  display: flex;
  flex-direction: column;
}

/* Ensure chat-box takes full width */
#chat-box {
  width: 100%;
}

/* Adjust microphone container */
#mic-container {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

/* Configuration Info */
#configuration {
  margin-top: 15px;
  font-size: 0.9em;
  color: #555555;
}

/* Responsive Grid Adjustments */
@media (max-width: 800px) {
  #voice .card {
    grid-template-columns: 1fr;
  }
}



/* Add New styles for the chat input container */
#text-input-container {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

#text-input {
  flex: 1;
  padding: 10px 15px;
  border: 1px solid #cccccc;
  border-radius: 8px;
  font-size: 1em;
  background-color: #ffffff;
  transition: border-color 0.3s, box-shadow 0.3s;
}

#text-input:focus {
  border-color: #00796B;
  box-shadow: 0 0 5px rgba(0, 121, 107, 0.5);
  outline: none;
}

#submit-button {
  background: linear-gradient(135deg, #00796B, #004D40);
  border: none;
  color: white;
  padding: 10px 20px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#submit-button:hover {
  background: linear-gradient(135deg, #005D56, #00332E);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#submit-button:disabled {
  background: linear-gradient(135deg, #A5D6A7, #81C784);
  cursor: not-allowed;
  box-shadow: none;
}