:root {
  --bg: #0e1116;
  --panel: #161b22;
  --border: #262d36;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --ok: #2ea043;
  --warn: #d29922;
  --err: #f85149;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1.25rem 4rem;
  max-width: 1000px;
  margin-inline: auto;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header { margin-bottom: 1.75rem; }
h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { margin: 0 0 .75rem; font-size: .95rem; text-transform: uppercase;
     letter-spacing: .06em; color: var(--muted); }
h3 { margin: 0 0 .35rem; font-size: 1.02rem; display: flex; align-items: center; gap: .55rem; }
.sub, .meta, .desc { color: var(--muted); font-size: .875rem; margin: .3rem 0 0; }

.panel, .step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.1rem;
}

.num {
  display: grid; place-items: center;
  width: 1.55rem; height: 1.55rem;
  border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: .8rem; font-weight: 600;
}

.steps { display: grid; gap: 1.1rem; }

.row { display: flex; gap: .6rem; flex-wrap: wrap; margin: .75rem 0; }

input, select {
  background: #0d1117; color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: .5rem .7rem; font: inherit; min-width: 9rem;
}

button {
  background: var(--accent); color: #fff;
  border: 0; border-radius: 6px;
  padding: .5rem .95rem; margin: .35rem .4rem .35rem 0;
  font: inherit; font-weight: 500; cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.secondary { background: #21262d; border: 1px solid var(--border); }

.out {
  background: #0d1117; border: 1px solid var(--border); border-radius: 6px;
  padding: .7rem .8rem; margin: .6rem 0 0;
  font: 12.5px/1.5 var(--mono);
  white-space: pre-wrap; word-break: break-word;
  max-height: 15rem; overflow: auto;
}
.out:empty { display: none; }
.out.error { border-color: var(--err); color: #ffb4ae; }

.legs { display: grid; gap: .45rem; }
.leg { display: flex; align-items: center; gap: .6rem; font-size: .875rem; }
.dot { width: .6rem; height: .6rem; border-radius: 50%; flex: none; }
.dot.ready { background: var(--ok); }
.dot.missing { background: var(--warn); }
.leg .missing-keys { color: var(--muted); font-family: var(--mono); font-size: .78rem; }

.events { max-height: 26rem; overflow: auto; display: grid; gap: .3rem; }
.event {
  display: grid; grid-template-columns: 5.2rem 4.6rem 1fr; gap: .6rem;
  padding: .4rem .55rem; border-radius: 5px; background: #0d1117;
  font: 12px/1.45 var(--mono); align-items: baseline;
}
.event .ts { color: var(--muted); }
.event .leg-tag { color: var(--accent); }
.event.error { border-left: 2px solid var(--err); }
.event.error .leg-tag { color: var(--err); }
.event.webhook { border-left: 2px solid var(--warn); }
.event details summary { cursor: pointer; }
.event pre { margin: .4rem 0 0; white-space: pre-wrap; color: var(--muted); }

@media (min-width: 760px) {
  .steps { grid-template-columns: 1fr 1fr; }
}