/* bat-che — Battery Chemistry interactive page styles
   Inherits theme variables from host site (--surf, --txt, --c-primary, etc.)
   and falls back to its own values when standalone. */

:root{
  --bc-red:#dc2626;
  --bc-red-2:#7f1d1d;
  --bc-amber:#f59e0b;
  --bc-cyan:#22d3ee;
  --bc-violet:#7c3aed;
  --bc-green:#10b981;
  --bc-radius:18px;
  --bc-radius-sm:12px;
}

[data-theme="dark"]{
  --bc-cyan:#67e8f9;
  --bc-amber:#fbbf24;
}

.bc-page{
  max-width:1200px;
  margin:0 auto;
  padding:18px 18px 60px;
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,sans-serif;
  color:var(--txt,#0f172a);
}

/* ── HERO ─────────────────────────────────────────── */
.bc-hero{
  position:relative; overflow:hidden;
  border-radius:24px;
  border:1px solid var(--brd,rgba(15,23,42,.09));
  background:var(--surf,#fff);
  padding:42px 32px 30px;
  margin-bottom:32px;
}
.bc-hero-bg{ position:absolute; inset:0; z-index:0; }
.bc-hero-bg svg{ width:100%; height:100%; display:block; }
.bc-hero-inner{ position:relative; z-index:1; }
.bc-hero-tag{
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 12px; border-radius:999px;
  background:linear-gradient(135deg,#2563eb22,#4f46e522);
  color:var(--c-primary,#2563eb);
  border:1px solid color-mix(in oklab, var(--c-primary,#2563eb) 25%, transparent);
  font-size:.78rem; font-weight:700; letter-spacing:.02em;
}
[data-theme="dark"] .bc-hero-tag{
  background:linear-gradient(135deg,#3b82f633,#818cf833);
  color:#a5b4fc;
}
.bc-hero-title{
  font-size:clamp(1.9rem, 4vw, 3rem);
  line-height:1.05; letter-spacing:-.02em;
  margin:14px 0 12px; font-weight:800;
  text-wrap:balance;
}
.bc-hero-title span{
  background:linear-gradient(135deg,var(--bc-red),var(--bc-amber));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.bc-hero-sub{
  max-width:780px; color:var(--txt-2,#475569);
  font-size:1.02rem; line-height:1.6; margin:0 0 22px;
  text-wrap:pretty;
}
.bc-hero-stats{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:12px; margin-bottom:18px;
}
.bc-stat{
  background:var(--surf2,#f1f5f9);
  border:1px solid var(--brd,rgba(15,23,42,.07));
  border-radius:14px; padding:14px 16px;
}
.bc-stat strong{
  display:block; font-size:1.6rem; font-weight:800;
  color:var(--c-primary,#2563eb); line-height:1;
}
.bc-stat span{ font-size:.78rem; color:var(--txt-3,#64748b); }
@media (max-width:640px){
  .bc-hero{ padding:28px 20px 22px; }
  .bc-hero-stats{ grid-template-columns:repeat(2,1fr); }
}

.bc-quicknav{
  display:flex; flex-wrap:wrap; gap:8px;
  padding-top:6px; border-top:1px dashed var(--brd,rgba(15,23,42,.1));
  margin-top:16px;
}
.bc-quicknav a{
  display:inline-flex; align-items:center; gap:6px;
  padding:7px 12px; border-radius:9px;
  background:var(--surf2,#f1f5f9);
  color:var(--txt-2,#475569); text-decoration:none;
  font-size:.78rem; font-weight:600;
  border:1px solid var(--brd,rgba(15,23,42,.07));
  transition:.18s;
}
.bc-quicknav a:hover{
  background:var(--c-primary,#2563eb); color:#fff;
  border-color:transparent;
  transform:translateY(-1px);
}

/* ── SECTION HEADERS ─────────────────────────────── */
.bc-section{ margin:48px 0; scroll-margin-top:90px; }
.bc-sechead{
  display:flex; gap:18px; align-items:flex-start;
  margin-bottom:24px;
}
.bc-secnum{
  font-family:'JetBrains Mono',monospace;
  font-weight:700; font-size:1.1rem;
  width:48px; height:48px; flex-shrink:0;
  display:grid; place-items:center;
  border-radius:14px;
  background:linear-gradient(135deg,var(--c-primary,#2563eb),var(--c-primary-2,#4f46e5));
  color:#fff;
  box-shadow:0 6px 18px color-mix(in oklab, var(--c-primary,#2563eb) 35%, transparent);
}
.bc-sechead h2{
  margin:0 0 6px;
  font-size:1.55rem; font-weight:800; letter-spacing:-.01em;
}
.bc-sechead p{
  margin:0; color:var(--txt-2,#475569); font-size:.95rem; line-height:1.55;
  max-width:780px; text-wrap:pretty;
}

/* ── 1. ANATOMY ───────────────────────────────────── */
.bc-anatomy-wrap{
  display:grid; grid-template-columns:1.35fr 1fr; gap:22px;
  align-items:start;
}
@media (max-width:880px){ .bc-anatomy-wrap{ grid-template-columns:1fr; } }

.bc-anatomy-svg{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:14px;
}
.bc-anatomy-svg svg{ width:100%; height:auto; display:block; }
.bc-layer{ cursor:pointer; transition:filter .2s, transform .2s; transform-origin:center; transform-box:fill-box; }
.bc-layer:hover{ filter:brightness(1.15); }
.bc-layer.is-active{ filter:drop-shadow(0 0 12px var(--c-primary,#2563eb)) brightness(1.18); }
.bc-layer-label{ font-size:11px; font-weight:600; fill:var(--txt-2,#475569); }

.bc-anatomy-info{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:22px;
  position:sticky; top:80px;
}
.bc-info-tag{
  display:inline-block;
  padding:4px 10px; border-radius:999px;
  background:color-mix(in oklab, var(--c-primary,#2563eb) 12%, transparent);
  color:var(--c-primary,#2563eb);
  font-size:.7rem; font-weight:700; letter-spacing:.04em;
  text-transform:uppercase;
  margin-bottom:10px;
}
.bc-anatomy-info h3{
  margin:0 0 8px; font-size:1.25rem; font-weight:800;
}
.bc-anatomy-info p{
  margin:0 0 14px; color:var(--txt-2,#475569);
  font-size:.92rem; line-height:1.65;
}
.bc-chemtable{
  border-top:1px dashed var(--brd,rgba(15,23,42,.1));
  padding-top:12px;
}
.bc-chem-head{
  font-size:.7rem; font-weight:800; letter-spacing:.06em;
  text-transform:uppercase; color:var(--txt-3,#64748b);
  margin-bottom:8px;
}
.bc-chemtable ul{ list-style:none; padding:0; margin:0; }
.bc-chemtable li{
  font-size:.85rem; color:var(--txt-2,#475569);
  padding:6px 0; border-bottom:1px dashed var(--brd,rgba(15,23,42,.06));
}
.bc-chemtable li:last-child{ border-bottom:none; }
.bc-chemtable li b{
  font-family:'JetBrains Mono',monospace;
  color:var(--txt,#0f172a); font-size:.82rem; margin-right:4px;
}

/* ── 2. CHEMISTRY ATLAS ───────────────────────────── */
.bc-chemgrid{
  display:grid; grid-template-columns:280px 1fr; gap:20px;
}
@media (max-width:880px){ .bc-chemgrid{ grid-template-columns:1fr; } }

.bc-chemlist{
  display:flex; flex-direction:column; gap:8px;
}
.bc-chemcard{
  display:flex; align-items:center; gap:12px;
  padding:12px 14px;
  border-radius:13px;
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  cursor:pointer; transition:all .2s;
  text-align:left;
}
.bc-chemcard:hover{ transform:translateX(4px); border-color:var(--c-primary,#2563eb); }
.bc-chemcard.is-active{
  background:linear-gradient(135deg,#2563eb,#4f46e5);
  border-color:transparent; color:#fff;
  box-shadow:0 8px 22px rgba(79,70,229,.32);
}
.bc-chemcard.is-active .bc-cc-formula,
.bc-chemcard.is-active .bc-cc-sub{ color:rgba(255,255,255,.85); }
.bc-cc-icon{
  width:38px; height:38px; flex-shrink:0;
  border-radius:10px; display:grid; place-items:center;
  font-weight:800; font-size:.78rem;
  background:linear-gradient(135deg,var(--cc-c1,#dc2626),var(--cc-c2,#7f1d1d));
  color:#fff;
  font-family:'JetBrains Mono',monospace;
}
.bc-cc-text{ flex:1; min-width:0; }
.bc-cc-name{ font-weight:700; font-size:.94rem; line-height:1.2; }
.bc-cc-formula{
  font-family:'JetBrains Mono',monospace;
  font-size:.72rem; color:var(--txt-3,#64748b);
  margin-top:2px;
}

.bc-chempanel{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:24px;
  min-height:420px;
}
.bc-cp-head{
  display:flex; align-items:center; gap:14px;
  padding-bottom:14px;
  border-bottom:1px dashed var(--brd,rgba(15,23,42,.1));
  margin-bottom:16px;
}
.bc-cp-icon{
  width:54px; height:54px; flex-shrink:0;
  border-radius:14px; display:grid; place-items:center;
  background:linear-gradient(135deg,var(--cc-c1,#dc2626),var(--cc-c2,#7f1d1d));
  color:#fff;
  font-family:'JetBrains Mono',monospace; font-weight:800;
  font-size:.95rem;
}
.bc-cp-titles h3{ margin:0; font-size:1.35rem; font-weight:800; letter-spacing:-.01em; }
.bc-cp-titles .formula{
  font-family:'JetBrains Mono',monospace;
  color:var(--txt-3,#64748b); font-size:.82rem; margin-top:3px;
}
.bc-cp-desc{
  color:var(--txt-2,#475569); line-height:1.65; font-size:.95rem;
  margin:0 0 16px;
}
.bc-cp-bars{
  display:grid; gap:10px;
  grid-template-columns:repeat(2,1fr);
  margin:0 0 18px;
}
@media (max-width:580px){ .bc-cp-bars{ grid-template-columns:1fr; } }
.bc-cp-bar{
  background:var(--surf2,#f1f5f9);
  border-radius:10px; padding:10px 12px;
}
.bc-cp-bar-head{
  display:flex; justify-content:space-between; align-items:center;
  font-size:.78rem; color:var(--txt-2,#475569); margin-bottom:6px;
  font-weight:600;
}
.bc-cp-bar-head strong{ color:var(--txt,#0f172a); font-weight:800; }
.bc-cp-bar-track{
  height:7px; border-radius:999px;
  background:var(--brd,rgba(15,23,42,.08)); overflow:hidden;
}
.bc-cp-bar-fill{
  height:100%; border-radius:999px;
  background:linear-gradient(90deg,var(--c-primary,#2563eb),var(--c-primary-2,#4f46e5));
  transition:width .6s cubic-bezier(.4,0,.2,1);
}

.bc-cp-mol{
  background:var(--surf2,#f1f5f9);
  border-radius:14px; padding:14px;
  margin:0 0 16px;
}
.bc-cp-mol-head{
  font-size:.7rem; font-weight:800; letter-spacing:.06em;
  text-transform:uppercase; color:var(--txt-3,#64748b);
  margin-bottom:10px;
}
.bc-cp-mol-grid{
  display:flex; flex-wrap:wrap; gap:10px; align-items:center;
}
.bc-atom{
  display:inline-flex; flex-direction:column; align-items:center;
  width:54px; padding:6px 0;
  border-radius:10px;
  background:var(--surf,#fff);
  border:2px solid currentColor;
}
.bc-atom-sym{ font-weight:800; font-size:.95rem; line-height:1; font-family:'JetBrains Mono',monospace; }
.bc-atom-name{ font-size:.6rem; color:var(--txt-3,#64748b); margin-top:3px; line-height:1; }
.bc-atom-arrow{ color:var(--txt-3,#64748b); font-size:.85rem; }

.bc-cp-pros{
  display:grid; grid-template-columns:1fr 1fr; gap:10px;
}
@media (max-width:580px){ .bc-cp-pros{ grid-template-columns:1fr; } }
.bc-cp-pros > div{
  border-radius:12px; padding:10px 14px;
  font-size:.86rem; line-height:1.5;
}
.bc-cp-pro{
  background:color-mix(in oklab, var(--bc-green) 12%, transparent);
  border:1px solid color-mix(in oklab, var(--bc-green) 35%, transparent);
}
.bc-cp-pro b{ color:var(--bc-green); }
.bc-cp-con{
  background:color-mix(in oklab, var(--bc-red) 10%, transparent);
  border:1px solid color-mix(in oklab, var(--bc-red) 30%, transparent);
}
.bc-cp-con b{ color:var(--bc-red); }
.bc-cp-pros ul{ margin:6px 0 0; padding-left:16px; }
.bc-cp-pros li{ margin:2px 0; }

/* ── 3. CHARGE SIM ────────────────────────────────── */
.bc-sim{
  display:grid; grid-template-columns:1.35fr 1fr; gap:22px;
}
@media (max-width:980px){ .bc-sim{ grid-template-columns:1fr; } }
.bc-sim-stage{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:14px;
}
.bc-sim-stage svg{ width:100%; height:auto; display:block; border-radius:12px; overflow:hidden; }
.bc-sim-modes{
  display:flex; gap:8px; margin-top:12px; flex-wrap:wrap;
}
.bc-mode{
  flex:1; min-width:120px;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:10px 14px; border-radius:11px;
  background:var(--surf2,#f1f5f9);
  border:1px solid var(--brd,rgba(15,23,42,.07));
  color:var(--txt-2,#475569); font-weight:700; font-size:.85rem;
  cursor:pointer; transition:all .2s;
}
.bc-mode:hover{ color:var(--c-primary,#2563eb); }
.bc-mode.active{
  background:linear-gradient(135deg,var(--c-primary,#2563eb),var(--c-primary-2,#4f46e5));
  color:#fff; border-color:transparent;
  box-shadow:0 4px 14px color-mix(in oklab, var(--c-primary,#2563eb) 35%, transparent);
}

.bc-sim-meters{
  display:flex; flex-direction:column; gap:12px;
}
.bc-meter{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:14px;
  padding:12px 14px;
}
.bc-meter-head{
  display:flex; align-items:center; gap:8px;
  font-size:.82rem; color:var(--txt-2,#475569);
  margin-bottom:8px; font-weight:600;
}
.bc-meter-head i{
  width:22px; height:22px; display:grid; place-items:center;
  background:var(--surf2,#f1f5f9); border-radius:6px;
  color:var(--c-primary,#2563eb); font-size:.75rem;
}
.bc-meter-head strong{
  margin-left:auto; color:var(--txt,#0f172a); font-weight:800;
  font-family:'JetBrains Mono',monospace;
}
.bc-meter-bar{
  height:8px; background:var(--surf2,#f1f5f9);
  border-radius:999px; overflow:hidden;
}
.bc-meter-bar > div{
  height:100%; border-radius:999px;
  background:linear-gradient(90deg,var(--bc-green),#22d3ee);
  transition:width .35s ease;
}
.bc-fill-v{ background:linear-gradient(90deg,#3b82f6,#8b5cf6) !important; }
.bc-fill-t{ background:linear-gradient(90deg,#10b981,#f59e0b,#dc2626) !important; }
.bc-fill-a{ background:linear-gradient(90deg,#ec4899,#8b5cf6) !important; }

.bc-sim-note{
  background:var(--surf2,#f1f5f9);
  border-left:3px solid var(--c-primary,#2563eb);
  padding:10px 14px; border-radius:10px;
  font-size:.84rem; line-height:1.55;
  color:var(--txt-2,#475569);
}

/* SVG ion particles */
.bc-ion{
  fill:#fbbf24; stroke:#f59e0b; stroke-width:1;
  filter:drop-shadow(0 0 4px #fbbf24);
}
.bc-ion-e{
  fill:#22d3ee; filter:drop-shadow(0 0 5px #22d3ee);
}

/* ── 4. FORMATS ───────────────────────────────────── */
.bc-formats{
  display:grid; grid-template-columns:repeat(3,1fr); gap:18px;
}
@media (max-width:880px){ .bc-formats{ grid-template-columns:1fr; } }
.bc-format{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:18px;
  position:relative; overflow:hidden;
  transition:transform .25s, box-shadow .25s, border-color .25s;
}
.bc-format:hover{
  transform:translateY(-4px);
  box-shadow:0 14px 30px rgba(15,23,42,.08);
  border-color:var(--c-primary,#2563eb);
}
.bc-fmt-art{
  background:linear-gradient(180deg,var(--surf2,#f1f5f9),transparent);
  border-radius:14px; padding:8px; margin-bottom:14px;
  height:200px; display:grid; place-items:center;
}
.bc-fmt-art svg{ height:100%; width:auto; max-width:100%; }
.bc-fmt-tag{
  display:inline-block; font-size:.7rem; font-weight:800;
  padding:3px 10px; border-radius:999px; letter-spacing:.04em;
  text-transform:uppercase; margin-bottom:8px;
}
.bc-fmt-tag-cyl{ background:#fee2e2; color:#991b1b; }
.bc-fmt-tag-prism{ background:#e0e7ff; color:#3730a3; }
.bc-fmt-tag-pouch{ background:#d1fae5; color:#065f46; }
[data-theme="dark"] .bc-fmt-tag-cyl{ background:#7f1d1d55; color:#fca5a5; }
[data-theme="dark"] .bc-fmt-tag-prism{ background:#312e8155; color:#a5b4fc; }
[data-theme="dark"] .bc-fmt-tag-pouch{ background:#064e3b55; color:#6ee7b7; }
.bc-format h3{
  margin:0 0 8px; font-size:1.05rem; font-weight:800;
  font-family:'JetBrains Mono',monospace; letter-spacing:-.02em;
}
.bc-format p{
  margin:0 0 12px; color:var(--txt-2,#475569);
  font-size:.86rem; line-height:1.55;
}
.bc-fmt-meta{
  list-style:none; padding:0; margin:0;
  border-top:1px dashed var(--brd,rgba(15,23,42,.1));
  padding-top:10px;
}
.bc-fmt-meta li{
  font-size:.78rem; color:var(--txt-2,#475569);
  padding:4px 0;
}
.bc-fmt-meta li b{ color:var(--txt,#0f172a); font-weight:700; }

/* ── 5. RADAR COMPARE ────────────────────────────── */
.bc-compare{
  display:grid; grid-template-columns:300px 1fr; gap:22px;
  align-items:start;
}
@media (max-width:880px){ .bc-compare{ grid-template-columns:1fr; } }

.bc-compare-pickers{
  display:flex; flex-direction:column; gap:8px;
}
.bc-pickrow{
  display:flex; align-items:center; gap:10px;
  padding:10px 12px;
  border-radius:11px;
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  cursor:pointer; transition:all .2s;
  font-size:.86rem; font-weight:600;
}
.bc-pickrow:hover{ border-color:var(--c-primary,#2563eb); }
.bc-pickrow.is-on{
  background:linear-gradient(135deg,
    color-mix(in oklab, var(--pick-c,#2563eb) 18%, var(--surf,#fff)),
    var(--surf,#fff));
  border-color:var(--pick-c,#2563eb);
  box-shadow:0 4px 14px color-mix(in oklab, var(--pick-c,#2563eb) 18%, transparent);
}
.bc-pickrow .dot{
  width:14px; height:14px; border-radius:5px;
  background:var(--pick-c,#2563eb);
  border:2px solid #fff;
  box-shadow:0 0 0 1px var(--brd,rgba(15,23,42,.12));
}
.bc-pickrow .ck{
  margin-left:auto; width:18px; height:18px; border-radius:6px;
  border:1.5px solid var(--brd,rgba(15,23,42,.18));
  display:grid; place-items:center;
  font-size:.65rem; color:transparent;
}
.bc-pickrow.is-on .ck{
  background:var(--pick-c,#2563eb); border-color:transparent;
  color:#fff;
}

.bc-radar-wrap{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius);
  padding:18px;
  position:relative;
}
.bc-radar-wrap canvas{ width:100% !important; height:auto !important; max-width:520px; display:block; margin:0 auto; }
.bc-radar-legend{
  display:flex; flex-wrap:wrap; gap:10px 14px;
  justify-content:center; margin-top:10px;
  font-size:.82rem;
}
.bc-radar-legend span{
  display:inline-flex; align-items:center; gap:6px;
  color:var(--txt-2,#475569);
}
.bc-radar-legend i.dot{
  width:11px; height:11px; border-radius:4px; display:inline-block;
}

/* ── 6. PROS / CONS GRID ─────────────────────────── */
.bc-tradegrid{
  display:grid; grid-template-columns:repeat(2,1fr); gap:14px;
}
@media (max-width:780px){ .bc-tradegrid{ grid-template-columns:1fr; } }
.bc-trade{
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  border-radius:var(--bc-radius-sm);
  padding:18px;
  position:relative;
}
.bc-trade-head{
  display:flex; align-items:center; gap:10px;
  margin-bottom:12px; padding-bottom:10px;
  border-bottom:1px dashed var(--brd,rgba(15,23,42,.1));
}
.bc-trade-head .badge{
  width:32px; height:32px; border-radius:8px;
  display:grid; place-items:center;
  background:linear-gradient(135deg,var(--td-c1,#dc2626),var(--td-c2,#7f1d1d));
  color:#fff; font-weight:800; font-size:.72rem;
  font-family:'JetBrains Mono',monospace;
}
.bc-trade-head h4{
  margin:0; font-size:1rem; font-weight:800;
}
.bc-trade-head .formula{
  font-family:'JetBrains Mono',monospace;
  font-size:.7rem; color:var(--txt-3,#64748b); margin-top:2px;
}
.bc-trade-cols{
  display:grid; grid-template-columns:1fr 1fr; gap:10px;
}
@media (max-width:480px){ .bc-trade-cols{ grid-template-columns:1fr; } }
.bc-trade-col{
  border-radius:10px; padding:10px 12px;
  font-size:.8rem; line-height:1.5;
}
.bc-trade-col.pro{
  background:color-mix(in oklab, var(--bc-green) 10%, transparent);
  border:1px solid color-mix(in oklab, var(--bc-green) 30%, transparent);
}
.bc-trade-col.con{
  background:color-mix(in oklab, var(--bc-red) 9%, transparent);
  border:1px solid color-mix(in oklab, var(--bc-red) 28%, transparent);
}
.bc-trade-col h5{
  margin:0 0 6px; font-size:.7rem; font-weight:800;
  letter-spacing:.06em; text-transform:uppercase;
  display:flex; align-items:center; gap:6px;
}
.bc-trade-col.pro h5{ color:var(--bc-green); }
.bc-trade-col.con h5{ color:var(--bc-red); }
.bc-trade-col ul{ margin:0; padding-left:14px; color:var(--txt-2,#475569); }
.bc-trade-col li{ margin:2px 0; }

.bc-sustain{
  margin-top:24px;
  display:grid; grid-template-columns:auto 1fr; gap:18px;
  align-items:center;
  background:linear-gradient(135deg,
    color-mix(in oklab, var(--bc-green) 10%, var(--surf,#fff)),
    var(--surf,#fff));
  border:1px solid color-mix(in oklab, var(--bc-green) 28%, transparent);
  border-radius:var(--bc-radius);
  padding:22px 24px;
}
@media (max-width:580px){
  .bc-sustain{ grid-template-columns:1fr; text-align:left; }
}
.bc-sustain-icon{
  width:54px; height:54px; border-radius:14px;
  display:grid; place-items:center;
  background:linear-gradient(135deg,var(--bc-green),#22d3ee);
  color:#fff; font-size:1.3rem;
  box-shadow:0 8px 20px color-mix(in oklab, var(--bc-green) 35%, transparent);
}
.bc-sustain h3{ margin:0 0 6px; font-size:1.1rem; font-weight:800; }
.bc-sustain p{
  margin:0; color:var(--txt-2,#475569);
  font-size:.9rem; line-height:1.6;
}
.bc-sustain-pills{
  display:flex; flex-wrap:wrap; gap:8px; margin-top:10px;
}
.bc-sustain-pills span{
  display:inline-flex; align-items:center; gap:6px;
  padding:5px 11px; border-radius:999px;
  background:var(--surf,#fff);
  border:1px solid var(--brd,rgba(15,23,42,.09));
  font-size:.75rem; font-weight:700;
  color:var(--txt-2,#475569);
}
.bc-sustain-pills span i{ color:var(--bc-green); }

/* ── 7. PERIODIC GRID ────────────────────────────── */
.bc-periodic{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(120px, 1fr));
  gap:10px;
}
.bc-elem{
  position:relative; aspect-ratio:1/1.05;
  border-radius:13px; padding:10px;
  display:flex; flex-direction:column; justify-content:space-between;
  background:linear-gradient(135deg,var(--el-c1,#2563eb),var(--el-c2,#4f46e5));
  color:#fff;
  cursor:default;
  overflow:hidden;
  transition:transform .25s, box-shadow .25s;
}
.bc-elem:hover{
  transform:translateY(-3px) scale(1.02);
  box-shadow:0 10px 24px rgba(0,0,0,.18);
}
.bc-elem-num{
  font-size:.7rem; opacity:.8; font-family:'JetBrains Mono',monospace;
}
.bc-elem-sym{
  font-size:2rem; font-weight:800; line-height:1;
  font-family:'JetBrains Mono',monospace; letter-spacing:-.02em;
}
.bc-elem-name{ font-size:.78rem; font-weight:600; opacity:.95; }
.bc-elem-role{
  font-size:.62rem; opacity:.85; margin-top:4px;
  text-transform:uppercase; letter-spacing:.05em; font-weight:700;
}

/* ── OUTRO ─────────────────────────────────────── */
.bc-outro{
  margin-top:50px;
  background:linear-gradient(135deg,#0f172a,#1e293b);
  border-radius:24px;
  padding:38px 32px;
  color:#fff;
  text-align:center;
}
[data-theme="dark"] .bc-outro{
  background:linear-gradient(135deg,#1e293b,#0f172a);
  border:1px solid rgba(255,255,255,.06);
}
.bc-outro h2{
  margin:0 0 12px; font-size:1.4rem; font-weight:800; letter-spacing:-.01em;
  background:linear-gradient(135deg,#22d3ee,#a5b4fc);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.bc-outro p{
  max-width:760px; margin:0 auto;
  color:#cbd5e1; line-height:1.7; font-size:.96rem;
  text-wrap:pretty;
}

#mSocFill{width:62%;}
#mVFill{width:68%;}
#mTFill{width:35%;}
#mAFill{width:50%;}