:root {
  --bg: #0a0f1a; --panel: #111827; --panel2: #162033; --line: #223049; --text: #e6edf7; --muted: #8a9bb5;
  --accent: #3ddc97; --accent-ink: #04130c; --warn: #ffb020; --bad: #ff5d6c; --info: #5aa9ff;
  --radius: 12px; --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 var(--font); }
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 13px; margin: 0 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 12.5px; }
.right { text-align: right; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.grow { flex: 1; }
[hidden] { display: none !important; }

/* layout */
.shell { display: grid; grid-template-columns: 228px 1fr; min-height: 100vh; }
.side { background: var(--panel); border-right: 1px solid var(--line); padding: 18px 12px; position: sticky; top: 0; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; }
.brand { font-weight: 700; font-size: 18px; padding: 4px 10px 18px; letter-spacing: -0.02em; }
.brand b { color: var(--accent); }
.nav a { display: block; padding: 9px 12px; border-radius: 9px; color: var(--muted); font-weight: 500; margin-bottom: 2px; }
.nav a:hover { background: var(--panel2); color: var(--text); }
.nav a.on { background: rgba(61, 220, 151, .12); color: var(--accent); }
.nav .count { float: right; background: var(--warn); color: #201400; border-radius: 99px; font-size: 11px; padding: 0 7px; font-weight: 700; }
.side-foot { margin-top: auto; padding: 12px 10px 0; border-top: 1px solid var(--line); font-size: 12.5px; }
.main { padding: 26px 32px 60px; min-width: 0; }
.topbar { margin-bottom: 22px; }
.modes { display: inline-flex; background: var(--panel); border: 1px solid var(--line); border-radius: 99px; padding: 3px; }
.modes button { border: 0; background: transparent; color: var(--muted); padding: 5px 14px; border-radius: 99px; font: inherit; font-weight: 600; cursor: pointer; }
.modes button.on { background: var(--warn); color: #201400; }
.modes button.on[data-mode="live"] { background: var(--accent); color: var(--accent-ink); }
.modes button:disabled { opacity: .4; cursor: not-allowed; }

/* cards + stats */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); margin-bottom: 18px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.stat .k { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.stat .v { font-size: 24px; font-weight: 700; margin-top: 6px; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stat .s { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.bars { display: flex; align-items: flex-end; gap: 6px; height: 120px; }
.bars div { flex: 1; max-width: 56px; background: linear-gradient(180deg, var(--accent), rgba(61, 220, 151, .25)); border-radius: 4px 4px 0 0; min-height: 2px; position: relative; }
.bars div span { position: absolute; bottom: -20px; left: 0; right: 0; text-align: center; font-size: 10px; color: var(--muted); }
.banner { border: 1px solid var(--warn); background: rgba(255, 176, 32, .08); color: #ffd58a; padding: 12px 14px; border-radius: var(--radius); margin-bottom: 18px; }
.banner.bad { border-color: var(--bad); background: rgba(255, 93, 108, .08); color: #ffb3ba; }
.banner.ok { border-color: var(--accent); background: rgba(61, 220, 151, .08); color: #a8f0cf; }

/* tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 10px; border-bottom: 1px solid rgba(34, 48, 73, .6); vertical-align: middle; }
tr.click { cursor: pointer; }
tr.click:hover td { background: var(--panel2); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.empty { text-align: center; color: var(--muted); padding: 34px 10px; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 99px; font-size: 11.5px; font-weight: 600; background: var(--panel2); color: var(--muted); white-space: nowrap; }
.badge.ok { background: rgba(61, 220, 151, .14); color: var(--accent); }
.badge.bad { background: rgba(255, 93, 108, .14); color: var(--bad); }
.badge.warn { background: rgba(255, 176, 32, .14); color: var(--warn); }
.badge.info { background: rgba(90, 169, 255, .14); color: var(--info); }

/* forms */
label { display: block; font-size: 12.5px; color: var(--muted); margin: 0 0 5px; font-weight: 500; }
input, select, textarea { width: 100%; background: var(--bg); border: 1px solid var(--line); color: var(--text); border-radius: 9px; padding: 9px 11px; font: inherit; }
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(61, 220, 151, .5); border-color: var(--accent); }
textarea { min-height: 90px; font-family: var(--mono); font-size: 12.5px; }
.field { margin-bottom: 13px; }
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 0 14px; }
.filters { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.filters input, .filters select { width: auto; min-width: 170px; }
.btn { display: inline-block; border: 1px solid var(--line); background: var(--panel2); color: var(--text); border-radius: 9px; padding: 8px 14px; font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { border-color: rgba(255, 93, 108, .5); color: var(--bad); }
.btn.ok { border-color: rgba(61, 220, 151, .5); color: var(--accent); }
.btn.sm { padding: 4px 10px; font-size: 12.5px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 7px 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }
.secret { background: var(--bg); border: 1px dashed var(--accent); border-radius: 9px; padding: 12px; font-family: var(--mono); font-size: 12.5px; word-break: break-all; margin: 10px 0; }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 9px; padding: 14px; overflow-x: auto; font: 12.5px/1.55 var(--mono); margin: 10px 0 18px; }
code { font-family: var(--mono); font-size: 12.5px; background: var(--panel2); padding: 1px 5px; border-radius: 5px; }
pre code { background: none; padding: 0; }

/* modal + toast */
.modal-bg { position: fixed; inset: 0; background: rgba(3, 6, 12, .7); display: flex; align-items: flex-start; justify-content: center; padding: 6vh 16px; z-index: 50; overflow-y: auto; }
.modal { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 22px; width: 100%; max-width: 620px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }
#toasts { position: fixed; bottom: 20px; right: 20px; z-index: 60; display: grid; gap: 8px; }
.toast { background: var(--panel2); border: 1px solid var(--line); border-left: 3px solid var(--accent); padding: 10px 14px; border-radius: 9px; max-width: 360px; }
.toast.bad { border-left-color: var(--bad); }

/* landing / auth */
.landing { max-width: 1040px; margin: 0 auto; padding: 40px 22px 80px; }
.hero { display: grid; grid-template-columns: 1.2fr .9fr; gap: 40px; align-items: start; margin-top: 30px; }
.hero h1 { font-size: 42px; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 14px; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero p.lead { font-size: 16.5px; color: var(--muted); max-width: 520px; }
.feats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 26px; }
.feat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.feat b { display: block; margin-bottom: 3px; }
.feat span { color: var(--muted); font-size: 13px; }
.tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.tabs button { flex: 1; border: 1px solid var(--line); background: transparent; color: var(--muted); padding: 8px; border-radius: 9px; font: inherit; font-weight: 600; cursor: pointer; }
.tabs button.on { background: var(--panel2); color: var(--text); border-color: var(--muted); }
.auth-wrap { max-width: 400px; margin: 12vh auto; padding: 0 16px; }

/* checkout */
body.checkout { display: grid; place-items: center; min-height: 100vh; padding: 16px; background: radial-gradient(900px 500px at 50% -10%, #12233a, var(--bg)); }
.co-card { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 22px; text-align: center; }
.co-head { display: flex; justify-content: space-between; align-items: flex-start; text-align: left; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.co-merchant { font-weight: 700; font-size: 16px; }
.co-desc { color: var(--muted); font-size: 13px; }
.co-amount { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; white-space: nowrap; }
.co-test { background: rgba(255, 176, 32, .12); color: var(--warn); border-radius: 8px; font-size: 12px; font-weight: 700; padding: 6px; margin-bottom: 14px; letter-spacing: .04em; }
.co-qr { background: #fff; border-radius: 14px; padding: 10px; display: block; margin: 0 auto 8px; }
.co-hint { color: var(--muted); margin: 0 0 14px; }
.co-intent { display: block; padding: 12px; font-size: 15px; }
.co-vpa, .co-timer { color: var(--muted); font-size: 12.5px; margin-top: 10px; word-break: break-all; }
.co-sim { margin-top: 16px; border: 1px dashed var(--line); border-radius: 12px; padding: 12px; }
.co-sim-title { font-size: 11.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 8px; font-weight: 600; }
.co-sim .row { justify-content: center; }
.co-icon { width: 72px; height: 72px; border-radius: 50%; display: grid; place-items: center; font-size: 34px; margin: 18px auto 12px; font-weight: 700; }
.co-icon.ok { background: rgba(61, 220, 151, .15); color: var(--accent); }
.co-icon.bad { background: rgba(255, 93, 108, .15); color: var(--bad); }
.co-foot { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11.5px; }

/* docs */
.docs { max-width: 860px; margin: 0 auto; padding: 36px 22px 90px; }
.docs h2 { margin-top: 34px; font-size: 19px; padding-top: 18px; border-top: 1px solid var(--line); }
.docs h3 { margin-top: 22px; }
.docs table { margin: 10px 0 18px; }
.docs li { margin-bottom: 5px; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 10px; }
  .brand { padding: 4px 10px; }
  .nav { display: flex; flex-wrap: wrap; }
  .side-foot { margin: 0 0 0 auto; border: 0; padding: 0 10px; }
  .main { padding: 18px 14px 50px; }
  .hero { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dd { margin-bottom: 8px; }
}