/* CSS riêng của /cong-cu/chon-dung-luong-pin, nạp sau cong-cu.css. */
.st-tool .page .st-subheading { font-family: var(--font-head); font-weight: 300; font-size: clamp(1.1rem, 2.4vw, 1.6rem); line-height: 1.3; margin: 0 0 24px; }
.st-tool .page h2 { font-family: var(--font-head); font-weight: 500; font-size: 20px; margin: 0; }
.st-tool .hint { font-size: 13px; color: #6c757d; margin: 4px 0 0; }
.st-tool .layout { display: grid; grid-template-columns: minmax(280px, 360px) minmax(0, 1fr); gap: 24px; align-items: start; }
.st-tool .card.form { display: grid; gap: 18px; }
.st-tool .range-row { display: flex; justify-content: space-between; font-size: 12px; color: #6c757d; }
.st-tool .stage { display: grid; gap: 16px; min-width: 0; }
.st-tool .verdict .big { font-size: clamp(2rem, 6vw, 3rem); }
.st-tool .verdict .sub { max-width: 60ch; }
.st-tool .kpis { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.st-tool .note { font-size: 14px; color: #555; margin: 12px 0 0; }
.st-tool .btn-secondary { font-size: 17px; padding: 9px 18px; }
.st-tool .cta { margin-top: 28px; background: #fff; border: 2px solid var(--orange); border-radius: 4px; padding: 20px 22px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.st-tool .cta h2 { margin: 0 0 4px; }
.st-tool .cta p { margin: 0; color: #555; max-width: 60ch; }
.st-tool .cta .acts { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.st-tool .cta .contact { font-size: 14px; color: #555; }
.st-tool .cta .contact a { color: var(--green); font-weight: 500; }
.st-tool .next { margin-top: 28px; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.st-tool .next a { display: block; background: #fff; border: 1px solid #e6e6e6; border-radius: 4px; padding: 14px 16px; text-decoration: none; font-weight: 500; }
.st-tool .next a small { display: block; font-weight: 400; color: #6c757d; margin-top: 2px; }
.st-tool .next a:hover { border-color: var(--green); }

/* danh sách thiết bị */
.st-tool .apps { display: grid; gap: 6px; }
.st-tool .apps-head, .st-tool .app { display: grid; grid-template-columns: minmax(0, 1fr) 64px 64px; gap: 8px; align-items: center; }
.st-tool .apps-head { font-size: 12px; color: #6c757d; padding-bottom: 2px; border-bottom: 1px solid #eee; }
.st-tool .apps-head span:nth-child(n+2) { text-align: center; }
.st-tool .app label { display: flex; gap: 8px; align-items: center; font-size: 14px; font-weight: 400; min-width: 0; margin: 0; cursor: pointer; }
.st-tool .app label small { color: #6c757d; white-space: nowrap; }
.st-tool .app label input { accent-color: var(--green); width: 18px; height: 18px; flex: none; margin: 0; }
.st-tool .app input[type=number] { width: 100%; min-width: 0; height: auto; border: 1px solid var(--line); padding: 6px 4px; font: inherit; text-align: center; border-radius: 3px; }
.st-tool .app input[type=number]:disabled { background: #f4f4f4; color: #aaa; }
.st-tool .app.off label { color: #888; }

/* thanh điện theo thiết bị */
.st-tool .ebars { display: grid; gap: 7px; margin-top: 10px; }
.st-tool .ebar { display: grid; grid-template-columns: 120px minmax(0, 1fr) 96px; gap: 10px; align-items: center; font-size: 14px; }
.st-tool .ebar .tr { height: 16px; background: #eee; border-radius: 3px; overflow: hidden; }
.st-tool .ebar .fl { height: 100%; background: var(--blue); border-radius: 3px; }
.st-tool .ebar .v { text-align: right; font-variant-numeric: tabular-nums; }

/* bộ pin */
.st-tool #bat svg { display: block; width: 100%; height: auto; max-width: 560px; }
.st-tool .b-cell { fill: #fff; stroke: #6c757d; stroke-width: 1.5; }
.st-tool .b-fill { fill: var(--green); }
.st-tool .b-lab { font-family: var(--font-body); font-size: 12px; fill: #555; text-anchor: middle; }

/* bảng tiền pin */
.st-tool .cost-tbl { border-collapse: collapse; width: 100%; font-size: 15px; font-variant-numeric: tabular-nums; margin-top: 8px; }
.st-tool .cost-tbl td { padding: 9px 12px; border-bottom: 1px solid #eee; }
.st-tool .cost-tbl td:last-child { text-align: right; font-weight: 500; }
.st-tool .cost-tbl tr.sum td { background: #f1faf3; border-top: 2px solid var(--green); }
.st-tool .quote textarea { min-height: 120px; }

@media (max-width: 991px) {
  .st-tool .layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 520px) {
  .st-tool .ebar { grid-template-columns: 96px minmax(0, 1fr) 80px; }
}