:root {
  --bg: #0f1115;
  --card: #171a21;
  --text: #f5f7fb;
  --muted: #98a2b3;
  --line: #262b36;
  --err: #ef4444;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.eyebrow {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
h1, h2, h3 { margin: 0 0 12px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
}
.card.mini {
  padding: 12px;
  margin-bottom: 10px;
}
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.row:last-child { border-bottom: 0; }
.muted { color: var(--muted); }
.err { color: var(--err); }
.ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
}
.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  word-break: break-all;
  color: var(--muted);
  margin-top: 10px;
  font-size: 12px;
}
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
}
.tab.active { background: #202633; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
}


.region-row,
.tariff-row {
  cursor: pointer;
  border-radius: 10px;
  padding-left: 10px;
  padding-right: 10px;
}

.region-row.selected,
.tariff-row.selected {
  background: #202633;
  border: 1px solid var(--line);
}


.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.field input {
  background: #11151d;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
}

.pay-method {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}