/* beacon.css — Level 2 capstone "The Beacon" assembly page.
   Theme vars come from styles.css. */

/* ─── bill of materials ──────────────────────────────────────────────────── */
.bcn-bom {
  margin: 26px 0 22px;
  border: 1px solid var(--rule-strong);
  border-radius: 12px;
  overflow: hidden;
  max-width: 640px;
}
.bcn-bom-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 16px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-card);
}
.bcn-bom-row:last-child { border-bottom: none; }
.bcn-bom-label { font-size: 15px; color: var(--ink); }
.bcn-bom-label sub { font-size: 0.72em; }
.bcn-bom-mid {
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint);
}
.bcn-bom-val {
  font-size: 16px; color: var(--ink); display: inline-flex; align-items: center; gap: 8px;
}
.bcn-bom-val i {
  font-style: normal; font-family: 'IBM Plex Mono', monospace;
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 2px 6px; border-radius: 4px;
}
.bcn-bom-val i.yours { background: var(--current); color: var(--bg-card); }
.bcn-bom-val i.rec { background: var(--bg-deeper); color: var(--ink-faint); border: 1px solid var(--rule-strong); }

.bcn-rate {
  display: flex; flex-direction: column; gap: 5px;
  padding: 16px 20px; border-radius: 12px; max-width: 640px;
  background: var(--bg-deeper); border: 1px solid var(--rule-strong);
}
.bcn-rate.ok { border-color: var(--current); background: color-mix(in oklch, var(--current) 7%, var(--bg-card)); }
.bcn-rate-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint);
}
.bcn-rate-val { font-size: 18px; color: var(--ink-soft); }
.bcn-rate-val sub { font-size: 0.72em; }
.bcn-rate-val b { color: var(--current); font-size: 22px; }
.bcn-rate-note { font-size: 13px; color: var(--ink-faint); font-style: italic; }

/* ─── build layout ───────────────────────────────────────────────────────── */
.bcn-build {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
  gap: 30px;
  align-items: start;
}
.bcn-board-wrap {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--rule-strong);
  border-radius: 14px;
  padding: 12px;
}
.bb-board { display: block; }
.bcn-power {
  position: absolute; right: 22px; bottom: 22px;
  appearance: none; cursor: pointer;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  letter-spacing: 0.08em; padding: 11px 18px; border-radius: 9px;
  border: 1.5px solid var(--current); background: var(--bg-card); color: var(--current);
  transition: all 140ms ease;
}
.bcn-power:hover { transform: translateY(-1px); }
.bcn-power.on { background: var(--current); color: var(--bg-card); }

.bcn-panel {
  position: sticky; top: 86px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px 22px 20px;
}
.bcn-step-tag {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--current);
  margin-bottom: 10px;
}
.bcn-step-title { font-size: 26px; margin: 0 0 12px; line-height: 1.1; }
.bcn-step-body { font-size: 15px; line-height: 1.6; color: var(--ink-soft); margin: 0 0 14px; }
.bcn-step-body sub { font-size: 0.72em; }

/* ─── gated assembly task ────────────────────────────────────────────────── */
.bcn-task {
  margin: 4px 0 16px; padding: 16px 16px 14px;
  border: 1px solid var(--rule-strong); border-radius: 11px;
  background: var(--bg);
  border-left: 3px solid var(--water);
}
.bcn-task.done { border-left-color: var(--current); }
.bcn-task-q { font-size: 15px; line-height: 1.5; color: var(--ink); margin-bottom: 10px; }
.bcn-task-q sub { font-size: 0.72em; }
.bcn-task-formula {
  font-size: 13px; color: var(--ink-soft); background: var(--bg-deeper);
  padding: 8px 11px; border-radius: 7px; margin-bottom: 12px;
}
.bcn-task-formula sub { font-size: 0.72em; }
.bcn-task-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.bcn-task-input {
  display: inline-flex; align-items: center; gap: 6px; height: 40px;
  border: 1.5px solid var(--rule-strong); border-radius: 8px;
  background: var(--bg-card); padding: 0 12px;
}
.bcn-task-input:focus-within { border-color: var(--water); }
.bcn-task-input input {
  appearance: none; border: none; background: transparent; outline: none;
  font-family: 'IBM Plex Mono', monospace; font-size: 15px; color: var(--ink);
  width: 92px; height: 100%;
}
.bcn-task-input input:disabled { color: var(--ink-faint); }
.bcn-task-unit { font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--ink-faint); }
.bcn-task-check {
  appearance: none; cursor: pointer; height: 40px; padding: 0 18px; border: none;
  border-radius: 8px; background: var(--current); color: var(--bg-card);
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.bcn-task-check:disabled { background: var(--bg-deeper); color: var(--ink-faint); cursor: not-allowed; }
.bcn-task-badge {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.06em;
  color: var(--current); font-weight: 600;
}
.bcn-task-fb { margin-top: 11px; font-size: 14px; line-height: 1.5; }
.bcn-task-fb.ok { color: var(--ink-soft); }
.bcn-task-fb.ok b { color: var(--current); }
.bcn-task-fb.ok sub { font-size: 0.72em; }
.bcn-task-fb.wrong { color: #b3402f; }

.bcn-task-opts { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.bcn-opt {
  appearance: none; cursor: pointer; text-align: left;
  display: flex; align-items: center; gap: 11px;
  padding: 11px 13px; border-radius: 9px;
  border: 1.5px solid var(--rule-strong); background: var(--bg-card);
  font-size: 14px; line-height: 1.4; color: var(--ink);
  transition: border-color 130ms ease, background 130ms ease;
}
.bcn-opt:hover:not(:disabled) { border-color: var(--ink-soft); }
.bcn-opt.sel { border-color: var(--water); background: color-mix(in oklch, var(--water) 7%, var(--bg-card)); }
.bcn-opt.right { border-color: var(--current); background: color-mix(in oklch, var(--current) 9%, var(--bg-card)); }
.bcn-opt.wrong { border-color: #c0392b; background: color-mix(in oklch, #c0392b 8%, var(--bg-card)); }
.bcn-opt:disabled { cursor: default; }
.bcn-opt-key {
  flex: 0 0 auto; width: 22px; height: 22px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg-deeper); color: var(--ink-faint);
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; font-weight: 600;
}
.bcn-opt.right .bcn-opt-key { background: var(--current); color: var(--bg-card); }

.bcn-dot.locked { opacity: 0.4; cursor: not-allowed; }
.bcn-callout {
  font-size: 13px; color: var(--ink); background: var(--bg-deeper);
  border-radius: 8px; padding: 11px 13px; margin-bottom: 14px; line-height: 1.5;
}
.bcn-callout sub { font-size: 0.72em; }
.bcn-live {
  font-size: 14px; color: var(--ink-soft); padding: 11px 13px; margin-bottom: 14px;
  border-radius: 8px; border: 1px dashed var(--rule-strong); transition: all 160ms ease;
}
.bcn-live.lit { border-color: var(--current); color: var(--ink); background: color-mix(in oklch, var(--current) 8%, transparent); }
.bcn-live b { color: var(--current); }

.bcn-stepper { display: flex; gap: 8px; margin: 4px 0 16px; }
.bcn-dot {
  appearance: none; cursor: pointer; width: 30px; height: 30px; border-radius: 50%;
  border: 1.5px solid var(--rule-strong); background: var(--bg); color: var(--ink-faint);
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; transition: all 140ms ease;
}
.bcn-dot.on { border-color: var(--current); background: var(--current); color: var(--bg-card); }
.bcn-dot.done { border-color: var(--current); color: var(--current); }

.bcn-nav { display: flex; gap: 10px; }
.bcn-nav button {
  flex: 1; appearance: none; cursor: pointer;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.04em;
  padding: 11px 14px; border-radius: 9px;
  border: 1px solid var(--rule-strong); background: transparent; color: var(--ink-soft);
  transition: all 140ms ease;
}
.bcn-nav button:hover:not(:disabled) { border-color: var(--ink-soft); }
.bcn-nav button.primary { background: var(--current); color: var(--bg-card); border-color: var(--current); }
.bcn-nav button:disabled { opacity: 0.4; cursor: not-allowed; }

/* end-of-build nav: a certificate link or a power-up hint — never a dead "Next" */
a.bcn-nav-done {
  flex: 1; display: flex; align-items: center; justify-content: center;
  text-decoration: none; font-family: 'IBM Plex Mono', monospace;
  font-size: 13px; letter-spacing: 0.04em; border-radius: 9px; padding: 11px 14px;
  background: var(--current); color: var(--bg-card); border: 1px solid var(--current);
  transition: filter 140ms ease;
}
a.bcn-nav-done:hover { filter: brightness(1.08); }
.bcn-nav-hint {
  flex: 1; display: flex; align-items: center; justify-content: center; text-align: center;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--ink-soft);
  border: 1px dashed var(--rule-strong); border-radius: 9px; padding: 0 10px;
}
.bcn-nav-hint b { color: var(--current); }

/* live 555 OUT oscilloscope */
.bcn-scope {
  margin: 2px 0 16px; border: 1px solid #1f5a3c; border-radius: 8px;
  overflow: hidden; background: #06140d; opacity: 0.5; transition: opacity 220ms ease;
}
.bcn-scope.on { opacity: 1; }
.bcn-scope-head {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 6px 10px; font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  color: #a8d4b6; background: #0a2014; border-bottom: 1px solid #143a26;
}
.bcn-scope-dot { color: #7dff9a; font-size: 10px; letter-spacing: 0.06em; white-space: nowrap; }
.bcn-scope-svg { display: block; width: 100%; height: 86px; }
.bcn-scope-grid line { stroke: #123723; stroke-width: 0.6; }
.bcn-scope-trace { fill: none; stroke: #7dff9a; stroke-width: 2; stroke-linejoin: round; filter: drop-shadow(0 0 3px #7dff9a); }
.bcn-scope-cap { fill: #4d7a60; font-family: 'IBM Plex Mono', monospace; font-size: 8.5px; }

@media (max-width: 920px) {
  .bcn-build { grid-template-columns: 1fr; }
  .bcn-panel { position: static; }
}

/* ─── build certificate extras ───────────────────────────────────────────── */
.bcn-cert-specs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px;
  max-width: 460px; margin: 22px auto 0; text-align: left;
}
.bcn-cert-specs > div {
  display: flex; flex-direction: column; gap: 2px;
  border-left: 2px solid color-mix(in oklch, var(--current) 45%, transparent);
  padding-left: 11px;
}
.bcn-cert-specs span {
  font-family: 'IBM Plex Mono', monospace; font-size: 9.5px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint);
}
.bcn-cert-specs b { font-size: 15px; color: var(--ink); font-weight: 600; }
.bcn-cert-hint {
  font-family: 'IBM Plex Mono', monospace; font-size: 13.5px;
  color: var(--ink-faint); font-style: italic;
}