:root {
  --bg: #0E1220; --surface: #161B2E; --line: #262D45; --text: #E6E8F2; --muted: #8A90AA;
  --blue: #5B8CFF; --red: #FF6B5A; --amber: #F2C14E; --green: #4FD1A1;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 15px/1.55 "IBM Plex Sans", system-ui, sans-serif;
  min-height: 100vh; display: flex; flex-direction: column;
}
.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }
[hidden] { display: none !important; }

.top { display: flex; justify-content: space-between; align-items: center; padding: 18px 16px; max-width: 640px; width: 100%; margin: 0 auto; }
.brand { display: flex; gap: 10px; align-items: center; font-weight: 600; letter-spacing: .01em; }
.net { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 13px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.ok { background: var(--green); box-shadow: 0 0 0 3px rgba(79,209,161,.15); }
.dot.bad { background: var(--red); }

main { flex: 1; width: 100%; max-width: 640px; margin: 0 auto; padding: 0 16px 32px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin-bottom: 14px; }
h1 { font-size: 22px; font-weight: 600; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 18px; }
.hint { color: var(--muted); margin: 0 0 14px; font-size: 14px; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 14px; }
input, textarea {
  display: block; width: 100%; margin-top: 6px; padding: 11px 12px;
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 10px;
  font: 15px "IBM Plex Mono", ui-monospace, monospace; resize: vertical;
}
input:focus, textarea:focus { outline: none; border-color: var(--blue); }
.check { display: flex; gap: 10px; align-items: center; color: var(--text); font-size: 14px; }
.check input { width: auto; margin: 0; }

button {
  font: 500 14px "IBM Plex Sans", system-ui, sans-serif; color: var(--text);
  background: transparent; border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 16px; cursor: pointer;
}
button:hover { border-color: var(--muted); }
button:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
button.primary:hover { filter: brightness(1.08); }
button.ghost { border-color: transparent; color: var(--muted); }
button.ghost:hover { color: var(--text); }
button.danger:hover { color: var(--red); }
button.small { padding: 7px 12px; font-size: 13px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
#importBox { margin-top: 20px; }

.words { columns: 3; column-gap: 18px; padding: 14px 14px 14px 34px; margin: 0 0 16px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; font-family: "IBM Plex Mono", monospace; }
.words li { padding: 2px 0; color: var(--text); }
.words li::marker { color: var(--muted); font-size: 12px; }
@media (max-width: 480px) { .words { columns: 2; } }

.balance { padding: 26px 20px 18px; }
.bl-label { color: var(--muted); font-size: 13px; }
.bl-value { font: 500 40px/1.15 "IBM Plex Mono", monospace; margin: 6px 0 2px; word-break: break-all; }
.bl-value small { font-size: 16px; color: var(--muted); }
.bl-sub { color: var(--amber); font-size: 13px; min-height: 20px; }
.sync { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

.lbl { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.addr { word-break: break-all; font-size: 13px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 10px; }

.tabs { display: flex; gap: 4px; margin: 4px 0 10px; overflow-x: auto; scrollbar-width: none; }
.tabs button { border: none; border-radius: 8px; color: var(--muted); white-space: nowrap; padding: 9px 12px; }
.tabs button[aria-selected="true"] { color: var(--text); background: var(--surface); box-shadow: inset 0 -2px 0 var(--blue); }

.fee { color: var(--muted); font-size: 13px; margin: -4px 0 14px; }
.mm { display: flex; justify-content: space-between; align-items: center; gap: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 8px 8px 8px 12px; margin-bottom: 14px; font-size: 13px; min-width: 0; }
.mm span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.outs { width: 100%; border-collapse: collapse; font-size: 13px; }
.outs th { text-align: left; color: var(--muted); font-weight: 500; padding: 6px 4px; border-bottom: 1px solid var(--line); }
.outs td { padding: 8px 4px; border-bottom: 1px solid var(--line); font-family: "IBM Plex Mono", monospace; }
.st-ok { color: var(--green); } .st-wait { color: var(--amber); } .st-spent { color: var(--muted); }

#toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  max-width: min(560px, calc(100% - 32px)); background: var(--surface); border: 1px solid var(--line);
  border-left: 3px solid var(--blue); border-radius: 10px; padding: 12px 16px; font-size: 14px; word-break: break-word;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
#toast.err { border-left-color: var(--red); }
#toast.ok { border-left-color: var(--green); }

.foot { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; padding: 18px 16px 26px; color: var(--muted); font-size: 13px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--text); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }