:root {
  --bg0: #0c1210;
  --bg1: #141c18;
  --panel: #1a2420;
  --line: #2a3830;
  --text: #e8f0ea;
  --muted: #8aa092;
  --accent: #3dd68c;
  --accent-dim: #2a9d64;
  --warn: #e8a54b;
  --err: #e85d5d;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "DM Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg0);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(61, 214, 140, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 480px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.badge {
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid rgba(61, 214, 140, 0.35);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  animation: rise 0.4s ease-out;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.4rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.sub {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.pair {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.5rem;
  align-items: end;
  margin-bottom: 0.85rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.field span {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pair .field { margin-bottom: 0; }

input, select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg0);
  color: var(--text);
  font: 500 0.95rem/1.3 var(--sans);
  outline: none;
}

input:focus, select:focus { border-color: var(--accent-dim); }
input[readonly] { color: #c5dbc9; }

.flip {
  width: 40px;
  height: 40px;
  margin-bottom: 2px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg0);
  color: var(--accent);
  font-size: 1.1rem;
  cursor: pointer;
}

.btn {
  width: 100%;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: 10px;
  font: 600 0.98rem/1.2 var(--sans);
  cursor: pointer;
}

.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn.primary {
  background: var(--accent);
  color: #062014;
}

.btn.primary:hover:not(:disabled) { background: #4de39a; }

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.btn.ghost:hover { border-color: var(--accent-dim); }

.copy-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.copy-row .btn {
  width: auto;
  padding: 0.7rem 0.9rem;
  white-space: nowrap;
}

.status {
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
  word-break: break-word;
}

.status.info { background: rgba(61, 214, 140, 0.1); color: var(--accent); }
.status.error { background: rgba(232, 93, 93, 0.12); color: var(--err); }
.status.warn { background: rgba(232, 165, 75, 0.12); color: var(--warn); }

.routes {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.route {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg0);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.route:hover { border-color: var(--accent-dim); }
.route.selected {
  border-color: var(--accent);
  background: rgba(61, 214, 140, 0.08);
}

.route-top {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.route-amount {
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 500;
}

.route-meta { font-size: 0.8rem; color: var(--muted); }

.tag {
  display: inline-block;
  margin-left: 0.3rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background: rgba(61, 214, 140, 0.15);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 600;
}

.amount-box {
  text-align: center;
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: 12px;
  background: var(--bg0);
  border: 1px solid var(--line);
}

.amount-box .label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
}

.amount-box .value {
  margin-top: 0.25rem;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 500;
}

.amount-box .hint {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.qr-wrap {
  display: flex;
  justify-content: center;
  margin: 0.5rem 0 1rem;
}

.qr-wrap img {
  border-radius: 12px;
  background: #fff;
  padding: 10px;
}

.meta-grid {
  display: grid;
  gap: 0.55rem;
  margin: 0.5rem 0 1rem;
  font-size: 0.85rem;
}

.meta-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  margin-bottom: 0.15rem;
}

.meta-grid strong {
  font-weight: 500;
  font-family: var(--mono);
  font-size: 0.8rem;
  word-break: break-all;
}

.actions {
  display: grid;
  gap: 0.55rem;
}

.track-json {
  margin-top: 0.75rem;
  padding: 0.75rem;
  max-height: 220px;
  overflow: auto;
  border-radius: 10px;
  background: #0a0f0d;
  border: 1px solid var(--line);
  font: 400 0.72rem/1.4 var(--mono);
  color: #b8d4c0;
  white-space: pre-wrap;
  word-break: break-all;
}

.field-hint {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.35;
  text-transform: none;
  letter-spacing: 0;
}

.track-link {
  display: block;
  margin: 0.25rem 0 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  text-decoration: none;
}

.track-link:hover { text-decoration: underline; }

.track-summary {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: var(--bg0);
  border: 1px solid var(--line);
}

.track-summary .sum-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0.4rem;
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
}

.track-summary .sum-row span {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.track-summary .sum-row strong {
  font-weight: 500;
  word-break: break-all;
}

.track-summary .sum-row strong.mono,
.track-summary .mono {
  font-family: var(--mono);
  font-size: 0.78rem;
}

.track-summary em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.8em;
}

.track-summary .sum-link {
  display: inline-block;
  margin-top: 0.55rem;
  color: var(--accent);
  font-size: 0.9rem;
}

.status a { color: inherit; font-weight: 600; }

.track-details {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.track-details summary {
  cursor: pointer;
  margin-bottom: 0.4rem;
}

.foot {
  text-align: center;
  padding: 0 1rem 2rem;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 420px) {
  .pair { grid-template-columns: 1fr; }
  .flip { width: 100%; }
}