/* ============================================================
   Billing checker — pipeline explanation styles.
   All classes bc- prefixed, scoped under .bc-root.
   Reuses app.css Dark Glass tokens; billing-specific tokens
   below adapt to :root[data-theme="light"].
   Structure ported from the approved mock-up:
   Highlight repo docs/consolidated-billing-explainer.html
   ============================================================ */

.bc-root {
    --bc-router: #3987e5;
    --bc-switch: #d95926;
    --bc-wifi: #199e70;
    --bc-iot: #c98500;
    --bc-trap: #e0a33c;
    --bc-trap-wash: rgba(224, 163, 60, 0.12);
    --bc-mono: ui-monospace, 'Cascadia Code', Consolas, monospace;
    margin-top: 1rem;
}

:root[data-theme="light"] .bc-root {
    --bc-router: #2a78d6;
    --bc-switch: #eb6834;
    --bc-wifi: #1baf7a;
    --bc-iot: #eda100;
    --bc-trap: #a05a0a;
    --bc-trap-wash: rgba(160, 90, 10, 0.09);
}

/* ---------- header ---------- */
.bc-top { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; padding-bottom: 0.9rem; border-bottom: 1px solid var(--border); }
.bc-name { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; }
.bc-acct { font-family: var(--bc-mono); font-size: 0.78rem; color: var(--text-muted); }
.bc-typechip { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-border); border-radius: 999px; padding: 0.1rem 0.6rem; }
.bc-spacer { flex: 1; }
.bc-recipients { font-size: 0.8rem; color: var(--text-muted); }
.bc-pill { font-size: 0.72rem; font-weight: 700; border-radius: 999px; padding: 0.15rem 0.65rem; letter-spacing: 0.04em; }
.bc-pill.on { color: var(--success); border: 1px solid var(--success); background: var(--accent-soft); }
.bc-pill.off { color: var(--danger); border: 1px solid var(--danger); }

/* ---------- alerts ---------- */
.bc-alert { border: 1px solid var(--border-strong); border-left-width: 4px; border-radius: var(--radius-sm); padding: 0.5rem 0.9rem; margin: 0.6rem 0; font-size: 0.9rem; background: var(--surface); }
.bc-alert.bad { border-left-color: var(--danger); }
.bc-alert.warn { border-left-color: var(--warning); }
.bc-alert.info { border-left-color: var(--info); }
.bc-anchor { font-family: var(--bc-mono); font-size: 0.72rem; color: var(--text-muted); margin-top: 0.15rem; }

/* ---------- stat row ---------- */
.bc-statrow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin: 1rem 0 0.5rem; }
@media (max-width: 700px) { .bc-statrow { grid-template-columns: 1fr; } }
.bc-stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.7rem 1rem 0.6rem; }
.bc-lab { font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.09em; color: var(--text-muted); }
.bc-val { font-size: 1.7rem; font-weight: 750; letter-spacing: -0.02em; line-height: 1.25; font-variant-numeric: tabular-nums; }
.bc-val small { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); margin-left: 0.3rem; }
.bc-note { font-size: 0.78rem; color: var(--text-muted); }
.bc-dim { color: var(--text-muted); }
.bc-good { color: var(--success); }
.bc-bad { color: var(--danger); }

/* ---------- CSV drop zone ---------- */
.bc-drop { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin: 0.5rem 0 1rem; }
.bc-droplabel { flex: 1; min-width: 16rem; display: block; border: 1px dashed var(--border-strong); border-radius: var(--radius-sm); padding: 0.7rem 1rem; font-size: 0.85rem; color: var(--text-muted); cursor: pointer; background: var(--surface); }
.bc-droplabel:hover { border-color: var(--accent); background: var(--surface-hover); }
.bc-droplabel input[type=file] { display: block; width: 100%; font-size: 0.8rem; margin-top: 0.35rem; color: var(--text-muted); }
.bc-filechip { font-family: var(--bc-mono); font-size: 0.78rem; border: 1px solid var(--border-strong); border-radius: 999px; padding: 0.2rem 0.7rem; }

/* ---------- numbered section header ---------- */
.bc-msec { margin-top: 1.7rem; }
.bc-mh { display: flex; align-items: baseline; gap: 0.6rem; margin-bottom: 0.6rem; flex-wrap: wrap; }
.bc-mn { font-family: var(--bc-mono); font-size: 0.7rem; font-weight: 700; color: var(--accent); border: 1px solid var(--accent-border); border-radius: 999px; padding: 0 0.5rem; }
.bc-mh h4 { margin: 0; font-size: 1.02rem; font-weight: 750; }
.bc-hint { font-size: 0.78rem; color: var(--text-muted); }
.bc-sub { font-size: 0.85rem; color: var(--text-muted); max-width: 75ch; margin: 0.25rem 0 0.6rem; }

/* ---------- scope ---------- */
.bc-scope { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; font-size: 0.88rem; }
.bc-fpill { font-size: 0.78rem; border: 1px solid var(--border-strong); border-radius: 999px; padding: 0.15rem 0.7rem; color: var(--text); }
.bc-count { margin-left: auto; font-size: 0.85rem; color: var(--text-muted); }

/* ---------- type colours ---------- */
.bc-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; vertical-align: 1px; background: var(--border-strong); }
.bc-dot.router { background: var(--bc-router); }
.bc-dot.switch { background: var(--bc-switch); }
.bc-dot.wifi { background: var(--bc-wifi); }
.bc-dot.iot { background: var(--bc-iot); }

/* ---------- type cards ---------- */
.bc-typecards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.6rem; }
.bc-tcard { background: var(--surface); border: 1px solid var(--border); border-top: 3px solid var(--border-strong); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem 0.6rem; }
.bc-tcard.router { border-top-color: var(--bc-router); }
.bc-tcard.switch { border-top-color: var(--bc-switch); }
.bc-tcard.wifi { border-top-color: var(--bc-wifi); }
.bc-tcard.iot { border-top-color: var(--bc-iot); }
.bc-tname { font-size: 0.85rem; font-weight: 750; }
.bc-tcount { font-size: 1.4rem; font-weight: 780; font-variant-numeric: tabular-nums; }
.bc-trule { font-size: 0.75rem; color: var(--text-muted); line-height: 1.45; margin-top: 0.2rem; }
.bc-tcard-btn { cursor: pointer; text-align: left; font-family: inherit; width: 100%; }
.bc-tcard-btn:hover { border-color: var(--accent); background: var(--surface-hover); }
.bc-tcard-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.bc-tcard-cta { font-size: 0.7rem; color: var(--accent); font-weight: 650; }
.bc-filterbar { display: flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0.9rem; border-bottom: 1px solid var(--border); }
.bc-clearfilter { background: none; border: none; color: var(--text-muted); font-size: 0.75rem; cursor: pointer; font-family: inherit; }
.bc-clearfilter:hover { color: var(--text); }

/* ---------- trap box ---------- */
.bc-trap { background: var(--bc-trap-wash); border: 1px solid var(--bc-trap); border-radius: var(--radius-sm); padding: 0.7rem 1rem; margin-top: 0.7rem; font-size: 0.88rem; }
.bc-trap-eyebrow { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--bc-trap); margin-bottom: 0.15rem; }

/* ---------- allowance groups + tables ---------- */
.bc-grp { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 0.6rem; overflow: hidden; }
.bc-ghead { padding: 0.45rem 0.9rem; font-weight: 700; font-size: 0.85rem; border-bottom: 1px solid var(--border); background: var(--surface-hover); }
details.bc-grp > summary.bc-ghead { cursor: pointer; display: flex; align-items: center; gap: 0.5rem; list-style: none; }
summary.bc-ghead::-webkit-details-marker { display: none; }
summary.bc-ghead::after { content: "›"; margin-left: auto; transition: transform 0.15s ease; color: var(--text-muted); }
details[open] > summary.bc-ghead::after { transform: rotate(90deg); }
details.bc-grp:not([open]) > summary.bc-ghead { border-bottom: none; }
.bc-gmuted { font-weight: 500; color: var(--text-muted); font-size: 0.75rem; }
.bc-tablewrap { overflow-x: auto; }
.bc-table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
.bc-table th, .bc-table td { padding: 0.45rem 0.9rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.bc-table th { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); font-weight: 700; }
.bc-table th.num, .bc-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.bc-table tr:last-child td { border-bottom: none; }
.bc-table details summary { cursor: pointer; }
.bc-mono { font-family: var(--bc-mono); font-size: 0.72rem; color: var(--text-muted); }
.bc-why { font-size: 0.8rem; color: var(--text-muted); padding: 0.3rem 0 0.1rem; max-width: 60ch; }

/* ---------- rate card matrix ---------- */
.bc-matrixwrap { overflow-x: auto; }
.bc-matrix { border-collapse: separate; border-spacing: 4px; min-width: 560px; width: 100%; }
.bc-matrix th { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); font-weight: 700; padding: 0.2rem 0.5rem; text-align: center; }
.bc-matrix th.bc-rowh { text-align: left; white-space: nowrap; }
.bc-matrix th.bc-rowh small { display: block; font-family: var(--bc-mono); font-size: 0.62rem; letter-spacing: 0; text-transform: none; }
.bc-matrix td.bc-cell { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.5rem 0.6rem 0.4rem; text-align: center; min-width: 104px; }
.bc-units { font-family: var(--bc-mono); font-size: 1.05rem; font-weight: 700; }
.bc-ulab { font-size: 0.65rem; color: var(--text-muted); font-weight: 600; margin-left: 0.25rem; }
.bc-occ { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.2rem; font-variant-numeric: tabular-nums; }
.bc-matrix td.bc-tot { font-size: 0.78rem; font-weight: 700; text-align: center; color: var(--text-muted); font-variant-numeric: tabular-nums; padding: 0.2rem 0.5rem; }
.bc-matrixfoot { display: flex; gap: 1rem; flex-wrap: wrap; align-items: baseline; margin-top: 0.5rem; font-size: 0.85rem; color: var(--text-muted); }
.bc-grand { margin-left: auto; font-size: 0.95rem; font-weight: 750; color: var(--text); }
.bc-grand b { font-variant-numeric: tabular-nums; font-size: 1.1rem; }

/* ---------- device inspector ---------- */
.bc-insp { display: grid; grid-template-columns: minmax(280px, 5fr) minmax(280px, 7fr); gap: 0.75rem; align-items: start; }
@media (max-width: 900px) { .bc-insp { grid-template-columns: 1fr; } }
.bc-devlist { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.bc-search { width: 100%; box-sizing: border-box; border: none; border-bottom: 1px solid var(--border); background: transparent; color: var(--text); padding: 0.55rem 0.9rem; font-size: 0.85rem; }
.bc-search:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.bc-devscroll { max-height: 24rem; overflow-y: auto; }
.bc-devrow { display: flex; align-items: center; gap: 0.5rem; width: 100%; text-align: left; background: none; border: none; border-bottom: 1px solid var(--border); color: var(--text); padding: 0.4rem 0.9rem; font-size: 0.8rem; cursor: pointer; font-family: inherit; }
.bc-devrow:hover { background: var(--surface-hover); }
.bc-devrow.sel { background: var(--accent-soft); box-shadow: inset 2px 0 0 var(--accent); }
.bc-devrow.flagged .bc-devname { color: var(--danger); font-weight: 650; }
.bc-devname { font-family: var(--bc-mono); font-size: 0.75rem; }
.bc-devloc { color: var(--text-muted); font-size: 0.72rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 11rem; }
.bc-devtier { color: var(--text-muted); font-size: 0.72rem; margin-left: auto; }
.bc-devunits { font-variant-numeric: tabular-nums; font-size: 0.75rem; }
.bc-flag { color: var(--danger); }
.bc-devcount { padding: 0.35rem 0.9rem; font-size: 0.72rem; color: var(--text-muted); border-top: 1px solid var(--border); }
.bc-chip { display: inline-block; font-size: 0.68rem; font-weight: 700; border-radius: 999px; padding: 0 0.5rem; border: 1px solid var(--border-strong); color: var(--text-muted); }
.bc-chip.router { color: var(--bc-router); border-color: var(--bc-router); }
.bc-chip.switch { color: var(--bc-switch); border-color: var(--bc-switch); }
.bc-chip.wifi { color: var(--bc-wifi); border-color: var(--bc-wifi); }
.bc-chip.iot { color: var(--bc-iot); border-color: var(--bc-iot); }
.bc-chip.units { color: var(--accent); border-color: var(--accent-border); background: var(--accent-soft); font-variant-numeric: tabular-nums; }
.bc-traptext { color: var(--bc-trap); font-weight: 600; }
.bc-trace { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.8rem 1rem; }
.bc-tracehead { font-weight: 750; font-size: 0.95rem; margin-bottom: 0.4rem; }
.bc-trow { display: grid; grid-template-columns: 130px 1fr; gap: 0.8rem; padding: 0.5rem 0; border-bottom: 1px dashed var(--border); font-size: 0.85rem; }
.bc-trow:last-child { border-bottom: none; }
@media (max-width: 620px) { .bc-trow { grid-template-columns: 1fr; gap: 0.1rem; } }
.bc-tl { font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); padding-top: 0.15rem; }
.bc-tv { color: var(--text); }