.chat {
  display: flex;
  flex-direction: column;
  height: 100svh;
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
  box-sizing: border-box;
}

.header {
  text-align: center;
  margin-bottom: 24px;

  h1 {
    font-size: 32px;
    margin: 0 0 8px;
  }

  p {
    color: var(--text);
    margin: 0;
  }
}

.messages {
  flex: 1 1 auto;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-bottom: 16px;
}

.message {
  display: flex;

  &.user {
    justify-content: flex-end;
  }

  &.agent {
    justify-content: flex-start;
  }
}

.bubble {
  max-width: 70%;
  padding: 12px 16px;
  border-radius: 16px;
  background: #f5f5f5;
  color: #111;
  text-align: left;
  word-break: break-word;

  .role {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    color: #777;
  }

  .content {
    margin: 0;
    line-height: 1.5;
    white-space: pre-wrap;
  }
}

.user .bubble {
  background: #222;
  color: #fff;

  .role {
    color: #aaa;
  }
}

.inputArea {
  display: flex;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);

  input {
    flex: 1 1 auto;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text-h);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;

    &:focus {
      border-color: #999;
      box-shadow: 0 0 0 3px #e5e5e5;
    }

    &:disabled {
      opacity: 0.6;
      cursor: not-allowed;
    }
  }

  button {
    flex: 0 0 auto;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    background: #111;
    color: #fff;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;

    &:hover:not(:disabled) {
      opacity: 0.85;
    }

    &:active:not(:disabled) {
      transform: scale(0.98);
    }

    &:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }
  }
}

.loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #ddd;
  border-top-color: #111;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error {
  padding: 12px 16px;
  border-radius: 12px;
  background: #f5f5f5;
  color: #111;
  font-size: 14px;
  text-align: left;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: currentColor;
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@media (max-width: 640px) {
  .chat {
    padding: 16px;
  }

  .bubble {
    max-width: 85%;
  }
}