:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 14px;
}

.form-group input[type='text'],
.form-group input[type='number'],
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.form-group textarea {
  min-height: 80px;
  resize: vertical;
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.checkbox-row input[type='checkbox'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-row label {
  cursor: pointer;
  font-weight: 500;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success {
  background: #dcfce7;
  color: var(--success);
}

.badge-warning {
  background: #fef3c7;
  color: var(--warning);
}

.badge-info {
  background: #dbeafe;
  color: var(--primary);
}

.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  background: var(--text);
  color: #fff;
  border-radius: 8px;
  z-index: 9999;
  animation: slideIn 0.3s ease;
}

.toast.success {
  background: var(--success);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Chat bubbles */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  word-break: break-word;
}

.msg-visitor {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-agent,
.msg-system {
  align-self: flex-start;
  background: #f1f5f9;
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.msg-system {
  background: #fef9c3;
  font-size: 13px;
}

.msg-time {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

.msg-visitor .msg-time {
  color: rgba(255, 255, 255, 0.7);
}

.msg-image {
  margin-bottom: 4px;
}

.msg-image img {
  max-width: 220px;
  max-height: 220px;
  border-radius: 8px;
  cursor: pointer;
  display: block;
}

.msg-text + .msg-image,
.msg-image + .msg-text {
  margin-top: 6px;
}

.btn-image {
  background: var(--border);
  border: none;
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
}

.btn-image:hover {
  background: #cbd5e1;
}

.chat-input-area input[type='file'] {
  display: none;
}

.chat-input-area {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: var(--card);
}

.chat-input-area input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.qa-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 12px;
}

.qa-btn {
  padding: 6px 12px;
  background: #eff6ff;
  color: var(--primary);
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
}

.qa-btn:hover {
  background: #dbeafe;
}

/* Admin / agent shared */
.disabled-section {
  opacity: 0.5;
  pointer-events: none;
}

.msg-withdrawn {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
}

.btn-recall {
  display: block;
  margin-top: 4px;
  padding: 0;
  border: none;
  background: none;
  color: rgba(255, 255, 255, 0.75);
  font-size: 11px;
  cursor: pointer;
  text-decoration: underline;
}

.msg-agent .btn-recall {
  color: var(--muted);
}

.btn-recall:hover {
  color: var(--danger);
}

  opacity: 0.5;
  pointer-events: none;
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: center;
}