/* CSS riêng của /cong-cu/ban-dien-du-hay-giu-lai, 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); }

/* so sánh hai phương án */
.st-tool .cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.st-tool .cmp > div { border: 1px solid #e6e6e6; border-radius: 4px; padding: 14px 16px; background: #fcfcfc; min-width: 0; }
.st-tool .cmp > div.win { border-color: var(--green); background: #f1faf3; }
.st-tool .cmp h3 { font-family: var(--font-head); font-weight: 500; font-size: 15px; margin: 0 0 4px; color: var(--ink); }
.st-tool .cmp .amt { font-family: var(--font-head); font-weight: 700; font-size: 24px; font-variant-numeric: tabular-nums; }
.st-tool .cmp p { margin: 4px 0 0; font-size: 13px; color: #555; }

/* biểu đồ cầu thang */
.st-tool #chart { margin-top: 10px; }
.st-tool .c-grid { stroke: #e8e8e8; stroke-width: 1; }
.st-tool .c-axis { stroke: #888; stroke-width: 1.2; }
.st-tool .c-t { font-family: var(--font-body); font-size: 11px; fill: #6c757d; }
.st-tool .c-paid { fill: var(--blue); opacity: .88; }
.st-tool .c-keep { fill: var(--green); }
.st-tool .c-rest { fill: none; stroke: #6c757d; stroke-width: 1.2; stroke-dasharray: 4 4; }
.st-tool .c-rate { font-family: var(--font-body); font-size: 11px; fill: #555; text-anchor: middle; }
.st-tool .c-sell { stroke: var(--orange); stroke-width: 2; }
.st-tool .c-sell-t { font-family: var(--font-body); font-size: 12px; fill: #9A5A0A; font-weight: 500; }
.st-tool .legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: #555; margin-top: 10px; }
.st-tool .legend span { display: inline-flex; align-items: center; gap: 6px; }
.st-tool .legend i { width: 14px; height: 14px; border-radius: 2px; display: inline-block; }

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