body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f3f5f8;
  color: #0e1a2b;
}

.container {
  max-width: 860px;
  margin: 24px auto;
  padding: 16px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.08);
}

.hidden {
  display: none;
}

.chat {
  border: 1px solid #d0d7e2;
  border-radius: 10px;
  min-height: 280px;
  max-height: 520px;
  overflow-y: auto;
  padding: 12px;
  background: #fbfcfe;
}

.row {
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 8px;
  line-height: 1.4;
}

.user {
  background: #e7f0ff;
}

.assistant {
  background: #eef9f0;
}

.chat-form {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

input,
button,
textarea {
  padding: 10px;
  border: 1px solid #c8d0dd;
  border-radius: 8px;
}

input,
textarea {
  flex: 1;
}

button {
  background: #163f75;
  color: white;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background: #0f2d57;
}

.hint {
  font-size: 12px;
  color: #5e6a79;
}

.meta {
  font-size: 12px;
  color: #506077;
  margin: -2px 0 8px 0;
}

.card {
  border: 1px solid #d0d7e2;
  border-radius: 10px;
  padding: 12px;
  margin: 10px 0;
  background: #fbfcfe;
}

.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.login-card {
  max-width: 520px;
}

.login-toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-bottom: 8px;
}

.kb-manual {
  display: grid;
  gap: 10px;
}

.kb-manual textarea {
  min-height: 110px;
}

.manual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  align-items: center;
}

.manual-grid input,
.manual-grid button,
.kb-manual input,
.kb-manual textarea {
  width: 100%;
}

@media (max-width: 760px) {
  .manual-grid,
  .login-toolbar {
    grid-template-columns: 1fr;
  }
}

.toolbar label {
  font-size: 13px;
  color: #334155;
}

.muted {
  color: #506077;
  font-size: 12px;
}