:root {
  --bot-color: #e0e0e0;
  --you-color: #4a90e2;
  --chat-bg: #ffffff;
  --chat-header-bg: #4a90e2;
  --chat-footer-bg: #f5f5f5;
  --text-color: #000000;
}

body.dark-mode {
  --bot-color: #3a3a3a;
  --you-color: #357abd;
  --chat-bg: #2c2c2c;
  --chat-header-bg: #357abd;
  --chat-footer-bg: #3a3a3a;
  --text-color: #ffffff;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

/* Плавающая кнопка */
#chat-button {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--you-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 28px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition:
    transform 0.2s,
    background-color 0.2s;
}
#chat-button:hover {
  transform: scale(1.1);
  background-color: #356ac1;
}

/* Модальное окно */
#chat-modal {
  display: none;
  position: fixed;
  bottom: 100px;
  right: 30px;
  width: 360px;
  max-height: 500px;
  background-color: var(--chat-bg);
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  flex-direction: column;
  overflow: hidden;
  animation: fadeIn 0.3s ease-in-out;
}

#chat-header {
  background-color: var(--chat-header-bg);
  color: white;
  padding: 12px 16px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
}

#chat-header button {
  background: transparent;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
}

#chat-log {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
  background-color: var(--chat-footer-bg);
}

.message {
  margin: 6px 0;
  padding: 8px 14px;
  border-radius: 14px;
  max-width: 75%;
  word-wrap: break-word;
  color: var(--text-color);
  animation: fadeIn 0.25s ease-in;
}

.bot {
  background-color: var(--bot-color);
  align-self: flex-start;
}
.you {
  background-color: var(--you-color);
  color: white;
  align-self: flex-end;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

#chat-footer {
  display: flex;
  border-top: 1px solid #ddd;
  background-color: var(--chat-footer-bg);
}

#chat-message-input {
  flex: 1;
  padding: 10px;
  border: none;
  outline: none;
  font-size: 14px;
}

#chat-message-submit {
  background-color: var(--you-color);
  border: none;
  color: white;
  padding: 0 16px;
  cursor: pointer;
  transition: background-color 0.2s;
}
#chat-message-submit:hover {
  background-color: #356ac1;
}

#typing-indicator {
  font-style: italic;
  color: #666;
  margin: 5px;
  display: none;
}

#dark-mode-toggle {
  cursor: pointer;
  font-size: 16px;
  padding: 2px 6px;
  border-radius: 5px;
  background-color: rgba(255, 255, 255, 0.2);
}