/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Roboto', sans-serif;
  background-color: #121212;
  color: #e0e0e0;
  line-height: 1.6;
}
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Header */
header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 1px solid #333;
}
header h1 {
  font-weight: 500;
  font-size: 1.8rem;
}
#user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}
.checkmark {
  color: #0f0;
  font-weight: bold;
}

/* Buttons */
button {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 400;
  transition: opacity 0.3s;
}
.primary {
  background-color: #25D366;
  color: white;
}
.secondary {
  background-color: #2a2a2a;
  color: #e0e0e0;
}
button:hover {
  opacity: 0.8;
}

/* Form */
.form-container {
  width: 100%;
  max-width: 500px;
  background: #1e1e1e;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
  margin-bottom: 30px;
}
.form-container h2 {
  margin-bottom: 20px;
  font-size: 1.4rem;
}
.form-container input {
  display: block;
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #555;
  border-radius: 4px;
  background: #121212;
  color: #e0e0e0;
}
.form-buttons {
  display: flex;
  gap: 10px;
}

/* Chat Section */
.chat-section {
  width: 100%;
  max-width: 600px;
  background: #1e1e1e;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
  margin: 0 auto;
}
#messages {
  height: 300px;
  overflow-y: auto;
  border: 1px solid #333;
  border-radius: 4px;
  padding: 15px;
  margin-bottom: 15px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.message {
  max-width: 70%;
  padding: 10px 15px;
  border-radius: 18px;
  word-wrap: break-word;
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-message {
  margin-left: auto;
  background-color: #25D366;
  color: white;
  flex-direction: row-reverse;
}
.bot-message {
  margin-right: auto;
  background-color: #2a2a2a;
  color: #e0e0e0;
}

/* Avatar */
.message-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
}

/* Timestamp */
.message-timestamp {
  font-size: 0.7rem;
  opacity: 0.7;
}

/* Message input */
.message-input-container {
  display: flex;
  gap: 10px;
}
#message-input {
  flex: 1;
  padding: 10px;
  border: 1px solid #555;
  border-radius: 4px;
  background: #121212;
  color: #e0e0e0;
}

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