body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  padding: 18px;
  max-width: 980px;
  margin: 0 auto;
  line-height: 1.5;
}

h1 {
  font-size: 20px;
  margin: 0 0 10px;
}

.tabs {
  display: flex;
  gap: 10px;
  margin: 10px 0 14px;
  flex-wrap: wrap;
}

.tabbtn {
  padding: 8px 14px;
  border-radius: 12px;
  border: 1px solid #bbb;
  background: #e9e9e9;
  color: #222;
  cursor: pointer;
  font-size: 13px;
}

.tabbtn:hover {
  background: #ddd;
}

.tabbtn.active {
  border-color: #222;
  background: #111;
  color: #fff;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.box {
  background: #fafafa;
  border: 1px solid #ddd;
  border-radius: 14px;
  padding: 14px 16px;
  margin: 14px 0;
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.field {
  flex: 1 1 280px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
}

label {
  font-size: 12px;
  opacity: 0.8;
}

input, textarea, select {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 10px;
  font-size: 14px;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

button {
  padding: 10px 14px;
  border: 1px solid #222;
  background: #111;
  color: #fff;
  border-radius: 12px;
  cursor: pointer;
}

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

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

.note {
  font-size: 12px;
  opacity: 0.78;
  margin-top: 10px;
}

.ok {
  color: #0a7;
  font-weight: 650;
}

.bad {
  color: #c33;
  font-weight: 650;
}

code {
  background: #f1f1f1;
  padding: 2px 6px;
  border-radius: 7px;
}

ul {
  margin: 8px 0 8px 20px;
}

.pill {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid #ddd;
  border-radius: 999px;
  font-size: 12px;
  background: #fff;
}

.small {
  font-size: 12px;
  opacity: 0.8;
}

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

.h2 {
  margin: 0 0 8px;
}

.h3 {
  margin: 0 0 6px;
  font-size: 14px;
}

.p0 {
  margin: 0;
}