body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  background: #f1f5f9;
}

.app {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: #fff;
  border: 1px solid #dbe2ea;
  border-radius: 14px;
  padding: 16px;
}

.hidden {
  display: none;
}

input,
textarea,
button,
select {
  display: block;
  width: 100%;
  box-sizing: border-box;
  margin: 8px 0;
  padding: 10px;
}

label input[type="checkbox"] {
  display: inline;
  width: auto;
  margin-right: 6px;
  padding: 0;
}

button {
  border: 0;
  border-radius: 8px;
  background: #0f766e;
  color: #fff;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 12px;
}

#conversationList {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 500px;
  overflow: auto;
}

#conversationList li {
  border: 1px solid #dbe2ea;
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 8px;
  cursor: pointer;
}

.thread {
  border: 1px solid #dbe2ea;
  border-radius: 10px;
  min-height: 280px;
  max-height: 500px;
  overflow: auto;
  padding: 10px;
  background: #f8fafc;
}

.msg {
  margin: 6px 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: #e2e8f0;
}

.msg.user {
  background: #ccfbf1;
}

.msg.agent {
  background: #082f49;
  color: #fff;
}

.msg.assistant {
  background: #ddd6fe;
}

.error {
  color: #b91c1c;
}

.billing {
  margin: 12px 0 16px;
  padding: 12px;
  border: 1px solid #dbe2ea;
  border-radius: 10px;
  background: #f8fafc;
}

.billing-actions {
  display: flex;
  gap: 8px;
}

.billing-actions button {
  width: auto;
  min-width: 150px;
}

.muted {
  font-size: 12px;
  color: #475569;
}

.platform,
.settings,
.tickets {
  margin: 12px 0 16px;
  padding: 12px;
  border: 1px solid #dbe2ea;
  border-radius: 10px;
  background: #f8fafc;
}

#ticketList {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 240px;
  overflow: auto;
}

#ticketList li {
  border: 1px solid #dbe2ea;
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 8px;
}