* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f8fafc;
  color: #0f172a;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}

.topbar {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 18px 0;
}

.topbar h1 {
  margin: 8px 0 0;
}

.back-link {
  text-decoration: none;
  color: #0f766e;
  font-size: 14px;
}

.layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.panel {
  border: 1px solid #dbe2ec;
  border-radius: 12px;
  background: #fff;
  padding: 14px;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field span {
  font-size: 13px;
  color: #475569;
}

input,
textarea,
select {
  border: 1px solid #cbd5e1;
  border-radius: 9px;
  padding: 9px 11px;
  font-size: 14px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  border: none;
  border-radius: 9px;
  padding: 9px 12px;
  font-size: 14px;
  cursor: pointer;
}

.btn--primary {
  background: #0f766e;
  color: #fff;
}

.btn--secondary {
  background: #e2e8f0;
  color: #0f172a;
}

.status {
  margin: 4px 0 0;
  font-size: 13px;
  min-height: 17px;
  color: #334155;
}

.status--error {
  color: #b91c1c;
}

.status--ok {
  color: #0f766e;
}

.billing-box {
  border: 1px dashed #cbd5e1;
  border-radius: 10px;
  padding: 10px;
  color: #334155;
  margin-bottom: 10px;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
}