/* Must come first: [hidden] is attribute-level and loses to any class rule that
   sets `display`. Without this an element stays painted after el.hidden = true. */
[hidden] { display: none !important; }

:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --ink: #16202c;
  --muted: #5f6b7a;
  --line: #d8dfe7;
  --accent: #1668c1;
  --ok: #137a44;
  --warn: #8a5a00;
  --danger: #b0202a;
  --code: #f1f4f8;
  --shadow: 0 1px 2px rgba(20,32,48,.06), 0 4px 14px rgba(20,32,48,.05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f151c;
    --panel: #161e27;
    --ink: #e6ecf3;
    --muted: #94a3b4;
    --line: #26313d;
    --accent: #5aa9f8;
    --ok: #3ecf8e;
    --warn: #e0b355;
    --danger: #ff6b74;
    --code: #101820;
    --shadow: 0 1px 2px rgba(0,0,0,.4);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
code, pre, .addr, .mono { font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace; }
h1 { font-size: 17px; margin: 0; letter-spacing: -.01em; }
h2 { font-size: 15px; margin: 0 0 6px; }
h3 { font-size: 14px; margin: 0 0 8px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
.muted, .note { color: var(--muted); }
.note { font-size: 12px; }
.warn { color: var(--warn); font-weight: 600; }
.danger-text { color: var(--danger); }

/* ------------------------------------------------------------- topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 20px; background: var(--panel);
  border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.mark {
  font-size: 22px; color: var(--accent); line-height: 1;
  transform: translateY(-1px);
}
.sub { font-size: 12px; color: var(--muted); font-family: ui-monospace, Menlo, Consolas, monospace; }
.conn { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pill {
  font-size: 11.5px; padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); white-space: nowrap;
}
.pill.role.master { color: var(--ok); border-color: var(--ok); font-weight: 600; }
.pill.role.operator { color: var(--accent); border-color: var(--accent); font-weight: 600; }
.pill.role.viewer { color: var(--warn); border-color: var(--warn); }

/* -------------------------------------------------------------- banner */
.banner {
  margin: 0; padding: 9px 20px; font-size: 12.5px;
  background: color-mix(in srgb, var(--warn) 14%, var(--panel));
  border-bottom: 1px solid var(--line); color: var(--ink);
}
.banner.err { background: color-mix(in srgb, var(--danger) 16%, var(--panel)); }
.banner.ok { background: color-mix(in srgb, var(--ok) 14%, var(--panel)); }

main { max-width: 1080px; margin: 0 auto; padding: 20px; }

/* --------------------------------------------------------------- cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; box-shadow: var(--shadow);
}
.card label { display: block; font-size: 11px; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted); margin-bottom: 5px; }
.big { font-size: 20px; font-weight: 650; letter-spacing: -.02em; }
.addr { font-size: 12px; word-break: break-all; }

.roots { margin-top: 12px; display: grid; gap: 6px; }
.rootrow {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px;
}
.rootrow span { font-size: 11px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); min-width: 130px; }
.rootrow code { font-size: 11.5px; word-break: break-all; flex: 1; }
.rootrow em { font-style: normal; font-size: 11.5px; color: var(--ok); }
.rootrow em.bad { color: var(--danger); }

/* ---------------------------------------------------------------- tabs */
.tabs { display: flex; gap: 4px; margin: 22px 0 0; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.tabs button {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 9px 12px; font: inherit; font-size: 13px; color: var(--muted); cursor: pointer;
}
.tabs button:hover { color: var(--ink); }
.tabs button.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.panel, .panel-static {
  background: var(--panel); border: 1px solid var(--line); border-top: 0;
  border-radius: 0 0 10px 10px; padding: 18px; box-shadow: var(--shadow);
}
.panel { display: none; }
.panel.on { display: block; }
.panel-static { margin-top: 20px; border-top: 1px solid var(--line); border-radius: 10px; }
.lede { margin: 0 0 14px; color: var(--muted); font-size: 13px; max-width: 78ch; }

/* --------------------------------------------------------------- forms */
.row { display: flex; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.row.end { justify-content: flex-end; margin-bottom: 0; }
input {
  flex: 1; min-width: 260px; padding: 8px 11px; font: inherit; font-size: 13px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--line); border-radius: 7px;
}
input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 1px; }
.btn {
  padding: 8px 14px; font: inherit; font-size: 13px; font-weight: 550; cursor: pointer;
  background: var(--panel); color: var(--ink);
  border: 1px solid var(--line); border-radius: 7px; white-space: nowrap;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); color: #fff; }
.btn.ok:hover:not(:disabled) { border-color: var(--ok); color: var(--ok); }
.btn.danger:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }

/* -------------------------------------------------------------- result */
.result { margin-top: 14px; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.result table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.result td { padding: 7px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.result tr:last-child td { border-bottom: 0; }
.result td:first-child { color: var(--muted); width: 210px; white-space: nowrap; }
.result td.v { font-family: ui-monospace, Menlo, Consolas, monospace; word-break: break-all; }
.yes { color: var(--ok); font-weight: 600; }
.no  { color: var(--danger); font-weight: 600; }
.meh { color: var(--muted); }
.sect { background: var(--code); font-weight: 600; color: var(--ink) !important; }

/* ----------------------------------------------------------------- log */
.log { display: grid; gap: 6px; }
.logrow {
  display: flex; gap: 10px; align-items: baseline; font-size: 12.5px;
  padding: 7px 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg);
}
.logrow .t { color: var(--muted); font-size: 11px; white-space: nowrap; }
.logrow.err { border-color: var(--danger); }
.logrow.ok { border-color: var(--ok); }
a { color: var(--accent); }

/* --------------------------------------------------------------- modal */
/* display:none is the default here on purpose. A class selector outranks the UA's
   [hidden]{display:none}, so `display:flex` on .modal would leave a full-screen
   position:fixed overlay swallowing every click while looking invisible. */
.modal {
  position: fixed; inset: 0; background: rgba(8,12,18,.55);
  display: none; align-items: center; justify-content: center; padding: 20px; z-index: 50;
}
.modal:not([hidden]) { display: flex; }
.modal-box {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; max-width: 720px; width: 100%; max-height: 86vh; overflow: auto;
}
.modal-box label { display: block; font-size: 11px; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted); margin: 12px 0 4px; }
pre {
  background: var(--code); border: 1px solid var(--line); border-radius: 7px;
  padding: 10px; font-size: 11.5px; overflow-x: auto; margin: 0; white-space: pre-wrap;
  word-break: break-all;
}

footer {
  max-width: 1080px; margin: 0 auto; padding: 18px 20px 40px;
  display: flex; gap: 16px; justify-content: space-between; flex-wrap: wrap;
  font-size: 12px; color: var(--muted); border-top: 1px solid var(--line);
}
@media (max-width: 620px) {
  .result td:first-child { width: auto; }
  input { min-width: 100%; }
}

/* =================================================== platform additions === */

/* ---------------------------------------------------------- login gate */
.gate {
  position: fixed; inset: 0; z-index: 60; padding: 20px;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(1100px 520px at 50% -10%, color-mix(in srgb, var(--accent) 13%, transparent), transparent),
    var(--bg);
}
.gate[hidden] { display: none !important; }
.gate-box {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 28px; max-width: 520px; width: 100%; box-shadow: var(--shadow);
}
.brand.big .mark { font-size: 30px; }
.brand.big h1 { font-size: 21px; }
.gate-box .lede { margin: 18px 0 18px; font-size: 13px; }
.btn.big { padding: 11px 18px; font-size: 14px; width: 100%; justify-content: center; }
.gate-foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line);
  font-size: 11.5px; color: var(--muted);
}
.gate-foot code { font-size: 11px; word-break: break-all; }

/* -------------------------------------------------------- the pair view */
.pairgrid {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center;
  margin: 4px 0 18px;
}
.wbox {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
}
.wbox label {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted);
  margin-bottom: 7px;
}
.wbox .addr.big { font-size: 12.5px; font-weight: 600; letter-spacing: 0; }
.tag {
  text-transform: none; letter-spacing: 0; font-size: 10.5px; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px; padding: 1px 7px;
}
.bal { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 9px; font-size: 12px; color: var(--muted); }
.bal b { color: var(--ink); font-family: ui-monospace, Menlo, Consolas, monospace; }
.arrow { font-size: 22px; color: var(--accent); text-align: center; }
.panel h2 { margin-top: 22px; }
.panel h2:first-of-type { margin-top: 0; }
label.inline { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--muted); }
label.inline input { min-width: 0; width: 90px; flex: 0 0 auto; }
select {
  flex: 1; min-width: 260px; padding: 8px 11px; font: inherit; font-size: 13px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--bg); color: var(--ink); border: 1px solid var(--line); border-radius: 7px;
}
#mnemonicBox { margin-top: 10px; font-size: 13px; letter-spacing: .02em; }
@media (max-width: 780px) {
  .pairgrid { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); }
}