* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0b0c;
  color: white;
}

.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 280px;
  background: #151518;
  padding: 12px;
  overflow-y: auto;
  border-right: 1px solid #222;
}

.sidebar h2 {
  margin-top: 0;
}

#userDisplay {
  margin-bottom: 12px;
  color: #aaa;
  word-break: break-word;
}

.sidebar button {
  width: 100%;
  margin: 5px 0;
  padding: 12px;
  background: #2a66ff;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
}

.sidebar button:hover {
  opacity: 0.9;
}

hr {
  border: none;
  border-top: 1px solid #333;
  margin: 14px 0;
}

.miniTitle {
  color: #aaa;
  font-size: 13px;
  margin-bottom: 6px;
}

#fileStatus {
  font-size: 12px;
  color: #bbb;
  margin-top: 8px;
  white-space: pre-wrap;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

#chat {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
}

.msg {
  margin: 8px 0;
  padding: 12px;
  border-radius: 12px;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-width: 90%;
}

.user {
  background: #2a66ff;
  margin-left: auto;
}

.ai {
  background: #2a2a2e;
}

.system {
  background: #333;
  color: #ddd;
  margin-left: auto;
  margin-right: auto;
  font-size: 13px;
}

.msg img {
  max-width: 320px;
  width: 100%;
  border-radius: 12px;
  margin-top: 10px;
  display: block;
}

#attachedFiles {
  padding: 8px 12px;
  background: #101012;
  border-top: 1px solid #222;
  display: none;
  gap: 8px;
  flex-wrap: wrap;
}

.fileChip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #2a2a2e;
  color: white;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  margin: 4px;
}

.fileChip button {
  background: #444;
  color: white;
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.inputBar {
  display: flex;
  gap: 10px;
  padding: 12px;
  background: #151518;
  border-top: 1px solid #222;
}

.inputBar input {
  flex: 1;
  min-width: 0;
  padding: 12px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
}

.inputBar button {
  padding: 12px 18px;
  background: #2a66ff;
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .app {
    flex-direction: column;
    height: 100dvh;
  }

  .sidebar {
    width: 100%;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid #222;
  }

  .main {
    flex: 1;
    min-height: 0;
  }

  #chat {
    padding: 10px;
  }

  .msg {
    max-width: 100%;
    font-size: 14px;
  }

  .inputBar {
    padding: 10px;
  }

  .inputBar input {
    font-size: 16px;
  }

  .inputBar button {
    padding: 12px;
    min-width: 70px;
  }
}