/* ---
   TMM-OS VIS v2.0 - Chatbot Implementation
   Primary Font: Helvetica Neue
   Base Color: Cosmic Latte (#FFF8E7)
   --- */

/* 1.0 General & Body Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: #FFF8E7; /* Primary Base: Cosmic Latte */
  color: #000000; /* Primary Text: System Black */
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 2.0 Main Layout & Header */
.chat-container {
  width: 100%;
  max-width: 900px;
  margin: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.chat-header h1 {
  font-size: 48px; /* H1 Style */
  font-weight: bold; /* Bold is often better than Black for web */
  text-transform: uppercase; /* H1 Style */
  text-align: center;
  margin-bottom: 20px;
}

/* 3.0 Message Container */
.messages-container {
  flex-grow: 1;
  overflow-y: auto;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}

/* 4.0 Individual Message Bubbles */
.message {
  display: flex;
  align-items: flex-start;
  margin-bottom: 15px;
  max-width: 80%;
  opacity: 0;
  transform: translateY(20px);
  animation: fade-in-bottom 0.4s forwards;
}

.message img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.message p {
  padding: 12px 16px;
  border-radius: 18px;
  line-height: 1.5;
  font-size: 16px; /* Body Large Style */
}

/* User Message */
.user {
  flex-direction: row-reverse;
  margin-left: auto;
}
.user img {
  margin-left: 10px;
}
.user p {
  background-color: #f0f0f0;
  border-bottom-right-radius: 5px;
}

/* AI Bot Message */
.aibot {
  margin-right: auto;
}
.aibot img {
  margin-right: 10px;
}
.aibot p {
  background-color: #ffffff;
  border: 1px solid #e0e0e0;
  border-bottom-left-radius: 5px;
}

/* Error Message */
.error {
  margin-right: auto;
}
.error img {
  margin-right: 10px;
}
.error p {
  background-color: #FFDDDD; /* Subtle version of Art (Red) */
  border: 1px solid #FF0000;
  color: #000000;
  border-bottom-left-radius: 5px;
}

/* 5.0 Loading Indicator */
.loading-container {
  display: flex;
  align-items: center;
}
.loading-animation {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 4px solid #e0e0e0;
  border-top-color: #0000FF; /* Sound (Blue) Accent */
  animation: spin 1s linear infinite;
  margin-right: 10px;
}
.loading-text {
  font-size: 16px;
  color: #555;
}

/* 6.0 Input Form */
.chat-form {
  display: flex;
  align-items: stretch;
}

.chat-form textarea {
  flex-grow: 1;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 16px; /* Body Large Style */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  resize: none;
  overflow-y: hidden;
  line-height: 1.4;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-form textarea:focus {
  outline: none;
  border-color: #0000FF; /* Sound (Blue) Accent */
  box-shadow: 0 0 0 2px rgba(0, 0, 255, 0.2);
}

.chat-form button {
  margin-left: 10px;
  padding: 0 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background-color: #000000; /* System Black */
  color: #FFF8E7; /* Cosmic Latte */
  font-size: 15px; /* UI Label Style */
  font-weight: bold; /* UI Label Style */
  text-transform: uppercase; /* UI Label Style */
  transition: background-color 0.2s;
}

.chat-form button:hover {
  background-color: #0000FF; /* Sound (Blue) Accent on hover */
}

/* 7.0 Footer */
footer {
  padding: 20px;
  text-align: center;
  font-size: 14px; /* Body Small Style */
  color: #555;
}

footer a {
  color: #0000FF; /* Sound (Blue) Accent */
  font-weight: bold;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* 8.0 Animations */
@keyframes fade-in-bottom {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}