/* break_even_calculator — tool-specific design (the formula is the form + break-even chart). Shared: nav, footer, sidebars, ad script only. */
body[data-tool="break_even_calculator"] {
  --be-bg: #FAF9F6; --be-card: #FFFFFF; --be-ink: #111214; --be-ink2: #4B4F58; --be-mute: #8A8F99; --be-line: #E6E4DE;
  --be-rev: #111214; --be-cost: #E5484D; --be-fix: #9AA0AA; --be-gain: rgba(24,160,88,.16); --be-loss: rgba(229,72,77,.12); --be-up: #13844A;
  --be-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif; --be-mono: "DM Mono", ui-monospace, Menlo, monospace;
  background: var(--be-bg); color: var(--be-ink); font-family: var(--be-sans);
}
body[data-tool="break_even_calculator"] .dt-nav { background: var(--be-bg); border-bottom: 1px solid var(--be-line); }
body[data-tool="break_even_calculator"] .dt-nav .navbar-brand { color: var(--be-ink); }
.dt-bare { display: block; width: 100%; flex: 1; }
.bex { max-width: 1080px; margin: 0 auto; padding: 36px 20px 64px; }
.be-hero h1 { font-size: 48px; line-height: 1.05; font-weight: 800; letter-spacing: -.035em; margin: 0; }
.be-hero p { margin: 12px 0 0; font-size: 18px; color: var(--be-ink2); max-width: 60ch; }

.be { margin-top: 28px; background: var(--be-card); border: 1px solid var(--be-line); border-radius: 18px; padding: 26px 30px 28px; }
.be-mode { display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px; background: #F1F0EB; }
.be-mode button { border: 0; border-radius: 999px; background: transparent; padding: 8px 16px; font: inherit; font-size: 14px; font-weight: 600; color: var(--be-ink2); cursor: pointer; }
.be-mode button[aria-pressed="true"] { background: var(--be-ink); color: #fff; }
.be-mode button:focus-visible { outline: 2px solid var(--be-cost); outline-offset: 2px; }

/* the equation */
.be-eq { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px 14px; margin-top: 26px; }
.be-term { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.be-term label { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--be-mute); }
.be-term small { font-size: 12px; color: var(--be-mute); }
.be-in { display: flex; align-items: baseline; gap: 2px; border-bottom: 2px solid var(--be-ink); padding-bottom: 2px; }
.be-in span { font-size: 26px; font-weight: 700; color: var(--be-mute); }
.be-in input { width: 150px; border: 0; background: transparent; font-family: var(--be-sans); font-size: 34px; font-weight: 800; letter-spacing: -.02em; color: var(--be-ink); padding: 0; outline: none; -moz-appearance: textfield; font-variant-numeric: tabular-nums; }
.be-in input::-webkit-outer-spin-button, .be-in input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.be-in:focus-within { border-bottom-color: var(--be-cost); }
.be-eq .be-term small { min-height: 15px; }
.be-op { font-size: 40px; font-weight: 300; color: #B9BCC3; line-height: 1; padding-bottom: 26px; }
.be-par { font-size: 54px; padding-bottom: 20px; }
.be-res { display: flex; flex-direction: column; gap: 2px; padding: 10px 18px 12px; background: var(--be-ink); color: #fff; border-radius: 14px; margin-bottom: 10px; }
.be-res b { font-size: 40px; line-height: 1.05; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.be-res span { font-size: 13px; color: #C7CAD1; }
body[data-mode="margin"] .only-unit, body:not([data-mode="margin"]) .only-margin { display: none; }
.be-err { min-height: 0; margin: 10px 0 0; color: var(--be-cost); font-size: 14px; }
.be-err:empty { display: none; }

.be-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-top: 22px; }
.be-cards > div { border: 1px solid var(--be-line); border-radius: 14px; padding: 14px 16px; }
.be-cards span { display: block; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--be-mute); }
.be-cards b { display: block; margin-top: 6px; font-size: 26px; font-weight: 800; letter-spacing: -.01em; font-variant-numeric: tabular-nums; }

.be-chart { margin-top: 22px; border: 1px solid var(--be-line); border-radius: 14px; padding: 14px 16px 6px; }
.be-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--be-ink2); align-items: center; }
.be-legend i { display: inline-block; width: 18px; height: 3px; margin-right: 6px; vertical-align: middle; border-radius: 2px; }
.be-legend .lr { background: var(--be-rev); } .be-legend .lc { background: var(--be-cost); } .be-legend .lf { background: var(--be-fix); }
.be-legend .lp { height: 10px; background: rgba(24,160,88,.35); } .be-legend .ll { height: 10px; background: rgba(229,72,77,.3); }
#beChart svg { width: 100%; height: auto; display: block; margin-top: 6px; font-family: var(--be-mono); font-size: 11px; }
#beChart text { fill: var(--be-mute); }
#beChart .g { stroke: #EFEDE8; } #beChart .gainA { fill: var(--be-gain); } #beChart .lossA { fill: var(--be-loss); }
#beChart .rev { stroke: var(--be-rev); stroke-width: 2.5; } #beChart .cost { stroke: var(--be-cost); stroke-width: 2.5; } #beChart .fix { stroke: var(--be-fix); stroke-width: 1.5; stroke-dasharray: 6 5; }
#beChart .bev { stroke: var(--be-ink); stroke-width: 1; stroke-dasharray: 3 4; } #beChart .bep { fill: #fff; stroke: var(--be-ink); stroke-width: 3; }
#beChart .qv { stroke: var(--be-up); stroke-width: 1.5; stroke-dasharray: 2 4; }

.be-what { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 28px; margin-top: 24px; padding-top: 20px; border-top: 1px dashed var(--be-line); }
.be-what .be-in input { width: 100%; font-size: 26px; }
.be-what .be-in span { font-size: 20px; }
.be-what p { margin: 6px 0 0; font-size: 15px; color: var(--be-ink2); min-height: 22px; }
.be-what b { color: var(--be-ink); } .be-what b.up { color: var(--be-up); } .be-what b.dn { color: var(--be-cost); }

.be-adwrap { margin: 44px 0 8px; }
.be-article, .be-faq, .be-more { max-width: 720px; margin: 0 auto; }
.be-article { margin-top: 48px; font-size: 17px; line-height: 1.75; color: var(--be-ink2); }
.be-article h2, .be-faq h2, .be-more h2 { font-size: 28px; line-height: 1.25; font-weight: 800; letter-spacing: -.02em; color: var(--be-ink); margin: 52px 0 12px; }
.be-article h2:first-child { margin-top: 0; }
.be-article p { margin: 0 0 14px; } .be-article b { color: var(--be-ink); } .be-article a { color: var(--be-ink); }
.be-article ul { padding-left: 1.2em; } .be-article li { margin: 6px 0; }
.be-eqline { font-family: var(--be-mono); font-size: 15px; background: var(--be-card); border: 1px solid var(--be-line); border-left: 4px solid var(--be-ink); border-radius: 6px; padding: 12px 14px; color: var(--be-ink); }
.be-table { overflow-x: auto; margin: 16px 0 18px; border: 1px solid var(--be-line); border-radius: 12px; background: var(--be-card); }
.be-table table { width: 100%; border-collapse: collapse; font-size: 15px; }
.be-table th { text-align: left; padding: 12px 14px; font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--be-mute); border-bottom: 1px solid var(--be-line); }
.be-table td { padding: 10px 14px; border-bottom: 1px solid #F1EFEA; color: var(--be-ink); }
.be-table tr:last-child td { border-bottom: 0; }
.be-src { font-size: 15px; }
.be-q { border-bottom: 1px solid var(--be-line); }
.be-q summary { list-style: none; cursor: pointer; padding: 16px 32px 16px 0; position: relative; font-size: 18px; font-weight: 700; }
.be-q summary::-webkit-details-marker { display: none; }
.be-q summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 24px; font-weight: 400; color: var(--be-mute); }
.be-q[open] summary::after { content: "\2212"; }
.be-q p { margin: 0 0 18px; font-size: 17px; line-height: 1.7; color: var(--be-ink2); }
.be-more > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.be-more a { display: block; text-decoration: none; padding: 14px 16px; border: 1px solid var(--be-line); border-radius: 12px; background: var(--be-card); color: var(--be-ink); }
.be-more a:hover { border-color: var(--be-ink); }
.be-more b { display: block; font-size: 15px; } .be-more span { display: block; font-size: 13px; color: var(--be-mute); margin-top: 2px; }

@media (max-width: 900px) {
  .be-eq { flex-direction: column; align-items: stretch; gap: 4px; }
  .be-op { padding: 0; text-align: center; font-size: 32px; }
  .be-par { display: none; }
  .be-in input { width: 100%; }
  .be-res { margin: 6px 0 0; }
}
@media (max-width: 640px) {
  .bex { padding: 24px 14px 48px; }
  .be-hero h1 { font-size: 36px; }
  .be-hero p { font-size: 16px; }
  .be { padding: 18px 16px 20px; }
  .be-mode button { padding: 8px 12px; font-size: 13px; }
  .be-what { grid-template-columns: minmax(0, 1fr); }
  .be-article { font-size: 16px; }
  .be-article h2, .be-faq h2, .be-more h2 { font-size: 23px; margin-top: 40px; }
  .be-more > div { grid-template-columns: minmax(0, 1fr); }
}