body {
      font-family: 'Roboto', sans-serif;
      background: #121212;
      color: #ffffff;
      margin: 0;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 0 16px;
    }

    .chat-container {
      background: #1f1f1f;
      border-radius: 12px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
      padding: 20px;
      max-width: 700px;
      width: 100%;
      display: flex;
      flex-direction: column;
    }

    h2 {
      text-align: center;
      color: #bb86fc;
      margin-bottom: 20px;
      font-weight: 500;
    }

    .chat-box {
      flex-grow: 1;
      max-height: 420px;
      overflow-y: auto;
      padding: 12px;
      border: 1px solid #2d2d2d;
      border-radius: 8px;
      background: #2a2a2a;
      margin-bottom: 16px;
      display: flex;
  flex-direction: column;
    }
.message {
  display: block; /* ensures full-width layout */
  width: fit-content;
  max-width: 85%;
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: 16px;
  line-height: 1.5;
  word-wrap: break-word;
}

.message.user {
  align-self: flex-end;
  margin-left: auto;
  background: #333c4d;
  color: #e3f2fd;
  border-bottom-right-radius: 0;
}

.message.assistant {
  align-self: flex-start;
  margin-right: auto;
  background: #383838;
  border-bottom-left-radius: 0;
}

    .text-content {
      white-space: pre-wrap;
    }

    .input-area {
      display: flex;
      gap: 10px;
    }

    textarea {
      flex-grow: 1;
      padding: 10px 12px;
      resize: none;
      border-radius: 6px;
      background: #2a2a2a;
      color: #fff;
      border: 1px solid #444;
      font-size: 14px;
    }

    button {
      background: #6200ee;
      color: white;
      border: none;
      border-radius: 6px;
      padding: 10px 16px;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: background 0.3s;
    }

    button:hover {
      background: #3700b3;
    }

    .typing-indicator {
      display: flex;
      gap: 6px;
      margin: 6px 0 12px;
    }

    .dot {
      width: 8px;
      height: 8px;
      background-color: #bb86fc;
      border-radius: 50%;
      animation: blink 1.4s infinite both;
    }

    .dot:nth-child(2) {
      animation-delay: 0.2s;
    }

    .dot:nth-child(3) {
      animation-delay: 0.4s;
    }

    @keyframes blink {
      0%, 80%, 100% { opacity: 0.2; }
      40% { opacity: 1; }
    }

    .code-block {
      position: relative;
      background: #1e1e1e;
      color: #eee;
      padding: 12px;
      border-radius: 8px;
      margin-top: 8px;
    }

    .copy-btn {
      position: absolute;
      top: 8px;
      right: 12px;
      background: #444;
      color: #fff;
      border: none;
      padding: 4px 8px;
      font-size: 12px;
      border-radius: 4px;
      cursor: pointer;
    }

    .copy-btn:hover {
      background: #666;
    }

    @media (max-width: 600px) {
      .chat-box {
        max-height: 60vh;
      }

      button {
        padding: 8px 14px;
      }
    }

    .timestamp {
  font-size: 11px;
  color: #aaa;
  margin-top: 4px;
  display: block;
}

.timestamp.user {
  text-align: right;
}

.timestamp.assistant {
  text-align: left;
}

.code-line {
  display: flex;
}

.line-number {
  width: 30px;
  color: #888;
  text-align: right;
  padding-right: 12px;
  user-select: none;
}

.line-content {
  flex-grow: 1;
  white-space: pre-wrap;
}

.code-block-wrapper {
  position: relative;
  background: #2d2d2d;
  border-radius: 8px;
  margin: 10px 0;
  padding-top: 1.5em;
  overflow: auto;
}

.language-label {
  position: absolute;
  top: 0;
  right: 10px;
  background: #444;
  color: #fff;
  padding: 2px 8px;
  font-size: 0.75em;
  border-bottom-left-radius: 4px;
}

.copy-btn {
  position: absolute;
  top: 0;
  left: 10px;
  background: transparent;
  color: white;
  border: none;
  font-size: 0.9em;
  cursor: pointer;
}

pre[class*="language-"] {
  white-space: pre-wrap !important;
  word-break: break-word;
  overflow-x: auto;
}

.chat-image {
  max-width: 100%;
  height: auto;
  margin-top: 10px;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}