:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #16181d; --muted: #6b7280; --line: #e3e6eb;
  --accent: #3b5bfd; --accent-text: #ffffff; --code: #eef0f4; --error: #c62828;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --card: #181b21; --text: #e8eaee; --muted: #9aa1ad; --line: #2a2f38;
    --accent: #6f86ff; --accent-text: #0f1115; --code: #222731; --error: #ff6b6b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
main { max-width: 860px; margin: 0 auto; padding: 8px 16px 48px; }
.top { max-width: 860px; margin: 0 auto; padding: 18px 16px; display: flex; justify-content: space-between; align-items: center; }
.top nav a { margin-left: 18px; text-decoration: none; color: var(--muted); }
.logo { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--text); }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px; }
h1 { font-size: 30px; margin: 16px 0 8px; }
h2 { font-size: 20px; margin: 0 0 12px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 16px 0; }
.hero { text-align: center; padding: 36px 20px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.error { color: var(--error); }
.note { background: var(--code); padding: 10px 14px; border-radius: 10px; }
code, pre { background: var(--code); border-radius: 6px; font: 14px/1.5 ui-monospace, Consolas, monospace; }
code { padding: 1px 6px; word-break: break-all; }
pre { padding: 12px; margin: 0; overflow-x: auto; flex: 1; white-space: pre; }

.login { display: flex; gap: 8px; max-width: 560px; margin: 20px auto 0; }
.login input { flex: 1; min-width: 0; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--text); font: 15px ui-monospace, Consolas, monospace; }
button, .button {
  padding: 10px 16px; border-radius: 10px; border: 0; cursor: pointer; font: inherit; font-weight: 600;
  background: var(--accent); color: var(--accent-text); text-decoration: none; display: inline-block;
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; background: none; border: 0; padding: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.card h3 { margin: 0 0 6px; }

.balance { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; align-items: center; }
.big { font-size: 44px; font-weight: 800; line-height: 1.1; }
.big span { font-size: 18px; font-weight: 500; color: var(--muted); }
.big.empty { color: var(--error); }
.stats { display: grid; gap: 8px; min-width: 240px; }
.stats div { display: flex; justify-content: space-between; gap: 16px; }

.copyline { display: flex; gap: 8px; align-items: flex-start; margin: 8px 0; }
.copyline code { flex: 1; padding: 10px 12px; }
.copyline button { flex-shrink: 0; }

.tabs { display: flex; gap: 6px; margin: 12px 0; }
.tabs button { background: var(--code); color: var(--text); }
.tabs button.active { background: var(--accent); color: var(--accent-text); }
.hidden { display: none; }
ol li { margin: 8px 0; }

details { border-top: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 600; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.kv td:first-child { color: var(--muted); }

@media (max-width: 560px) {
  .login, .copyline { flex-direction: column; align-items: stretch; }
  .big { font-size: 34px; }
}