/* ROI calculator — locked v6 system */
.roi{background:var(--bg);padding-bottom:clamp(90px,11vh,150px)}
.roi-wrap{max-width:1180px;margin:0 auto;padding:0 48px}

/* hero */
.roi-hero{text-align:center;max-width:820px;margin:0 auto;padding:clamp(46px,7vh,86px) 0 clamp(30px,4vh,44px)}
.roi-kicker{display:block;font-family:var(--mono);font-weight:500;font-size:13.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-bottom:22px}
.roi-h1{font-family:var(--serif);font-weight:420;font-size:clamp(42px,5vw,78px);line-height:1.02;letter-spacing:-.022em;color:var(--ink);margin:0 auto;max-width:16ch;text-wrap:balance}
.roi-lede{font-size:var(--fs-body);line-height:var(--lh-body);color:var(--muted);margin:24px auto 0;max-width:60ch;text-wrap:pretty}

/* vertical picker */
.roi-verts{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:0 auto clamp(40px,6vh,68px);max-width:900px}
.roi-vert{font-family:var(--sans);font-size:16.5px;font-weight:500;color:var(--ink-soft);background:#fff;border:1px solid var(--line-2);border-radius:999px;padding:11px 20px;cursor:pointer;transition:background .16s,border-color .16s,color .16s}
.roi-vert:hover{border-color:var(--muted-2);color:var(--ink)}
.roi-vert.is-on{background:var(--ink);border-color:var(--ink);color:#FAF9F5}

/* grid */
.roi-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(370px,.85fr);gap:clamp(32px,4.5vw,72px);align-items:start}

/* inputs */
.roi-inputs{margin:0}
.roi-row{padding:26px 0;border-top:1px solid var(--line)}
.roi-row:first-child{border-top:0;padding-top:0}
.roi-lab{display:flex;justify-content:space-between;align-items:baseline;gap:20px}
.roi-lab label{font-size:var(--fs-support);font-weight:600;color:var(--ink);line-height:1.3}
.roi-field{display:flex;align-items:baseline;gap:2px;flex:none}
.roi-pre,.roi-suf{font-family:var(--sans);font-size:19px;font-weight:500;color:var(--muted)}
.roi-num{font-family:var(--sans);font-size:26px;font-weight:600;color:var(--ink);background:transparent;border:0;border-bottom:1.5px solid var(--line-2);width:5.4ch;text-align:right;padding:0 2px 3px;-moz-appearance:textfield}
.roi-num::-webkit-outer-spin-button,.roi-num::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.roi-num:focus{outline:0;border-bottom-color:var(--terra)}
.roi-num.w6{width:8.6ch}
.roi-hint{font-size:15.5px;color:var(--muted);margin:7px 0 0;line-height:1.45}
.roi-slider{-webkit-appearance:none;appearance:none;accent-color:var(--ink);width:100%;height:22px;background:transparent;margin-top:14px;cursor:pointer;display:block}
.roi-slider::-webkit-slider-runnable-track{height:3px;border-radius:2px;background:var(--line-2)}
.roi-slider::-moz-range-track{height:3px;border-radius:2px;background:var(--line-2)}
.roi-slider::-webkit-slider-thumb{-webkit-appearance:none;width:19px;height:19px;border-radius:50%;background:var(--ink);border:3px solid var(--bg);box-shadow:0 0 0 1px var(--ink);margin-top:-8px;transition:transform .14s}
.roi-slider::-moz-range-thumb{width:19px;height:19px;border-radius:50%;background:var(--ink);border:3px solid var(--bg);box-shadow:0 0 0 1px var(--ink);transition:transform .14s}
.roi-slider:hover::-webkit-slider-thumb,.roi-slider:focus::-webkit-slider-thumb{transform:scale(1.12)}
.roi-slider:hover::-moz-range-thumb,.roi-slider:focus::-moz-range-thumb{transform:scale(1.12)}
.roi-reset{margin-top:28px;font-family:var(--sans);font-size:16.5px;font-weight:500;color:var(--muted);background:none;border:0;padding:0;cursor:pointer;text-decoration:underline;text-decoration-color:var(--line-2);text-underline-offset:4px}
.roi-reset:hover{color:var(--terra);text-decoration-color:var(--terra)}

/* result */
.roi-out{position:sticky;top:calc(var(--nav-h,72px) + 24px);background:var(--paper-deep);border:1px solid var(--line-2);border-radius:18px;padding:clamp(26px,2.6vw,36px)}
.roi-out-k{display:block;font-family:var(--mono);font-weight:500;font-size:13px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.roi-total{font-family:var(--serif);font-weight:440;font-size:clamp(46px,5.4vw,74px);line-height:1;letter-spacing:-.026em;color:var(--ink);font-variant-numeric:tabular-nums}
.roi-total-sub{font-size:16.5px;color:var(--muted);margin:12px 0 0;line-height:1.45}
.roi-total-sub b{font-weight:600;color:var(--ink-soft)}
.roi-break{margin-top:26px;border-top:1px solid var(--line-2)}
.roi-brow{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:14px 0;border-bottom:1px solid var(--line-2)}
.roi-brow span{font-size:16.5px;color:var(--muted);line-height:1.35}
.roi-brow small{font-size:15px;color:var(--muted-2);font-variant-numeric:tabular-nums}
.roi-brow b{font-family:var(--sans);font-weight:600;font-size:19px;color:var(--ink);white-space:nowrap;font-variant-numeric:tabular-nums}
.roi-ba{display:flex;align-items:center;gap:14px;margin-top:22px;padding:16px 18px;background:#fff;border:1px solid var(--line-2);border-radius:12px}
.roi-ba-i{flex:1;min-width:0}
.roi-ba-i em{display:block;font-style:normal;font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:5px}
.roi-ba-i b{font-family:var(--sans);font-weight:600;font-size:19px;color:var(--ink)}
.roi-ba-a{flex:none;color:var(--terra)}
.roi-out .btn{display:block;text-align:center;margin-top:24px}
.roi-note{font-size:15px;color:var(--muted);margin:12px 0 0;text-align:center;line-height:1.45}

/* assumptions */
.roi-assume{max-width:760px;margin:clamp(80px,10vh,130px) auto 0;text-align:center}
.roi-mark{display:flex;justify-content:center;margin:0 0 26px;height:56px}
.roi-mark svg{height:56px;width:67px;flex:none;display:block;overflow:visible}
.roi-mark path,.roi-mark circle,.roi-mark rect{vector-effect:non-scaling-stroke}
.roi-mark .ink{fill:none;stroke:var(--ink);stroke-width:2.9;stroke-linecap:round;stroke-linejoin:round}
.roi-mark .fill{fill:#fff;stroke:none}
.roi-mark .dot{fill:var(--terra);stroke:none}
.roi-mark .draw{stroke-dasharray:var(--len);stroke-dashoffset:var(--len)}
.roi-mark.on .draw{animation:roiDraw .9s cubic-bezier(.6,.05,.2,1) forwards}
.roi-mark .rock{transform-box:view-box;transform-origin:36px 16px}
.roi-mark.on .rock{animation:roiTip 3.6s ease-in-out .95s infinite}
@keyframes roiDraw{to{stroke-dashoffset:0}}
@keyframes roiTip{0%,100%{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}
.roi-a-h{font-family:var(--serif);font-weight:420;font-size:clamp(34px,3.6vw,52px);line-height:1.06;letter-spacing:-.018em;color:var(--ink);margin:0}
.roi-a-p{font-size:var(--fs-support);line-height:1.55;color:var(--muted);margin:20px auto 0;max-width:62ch;text-wrap:pretty}
.roi-defs{text-align:left;margin:clamp(38px,5vh,56px) 0 0;border-top:1px solid var(--line)}
.roi-def{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 28px;align-items:baseline;padding:17px 0;border-bottom:1px solid var(--line)}
.roi-def dt{font-size:var(--fs-support);color:var(--ink-soft);line-height:1.4}
.roi-def dd{margin:0;font-family:var(--sans);font-weight:600;font-size:var(--fs-support);color:var(--ink);white-space:nowrap;font-variant-numeric:tabular-nums}
.roi-src{font-size:15.5px;color:var(--muted);margin:26px 0 0;line-height:1.55;text-align:left;text-wrap:pretty}

@media(max-width:1000px){.roi-grid{grid-template-columns:minmax(0,1fr);gap:44px}.roi-out{position:static}}
@media(max-width:760px){.roi-wrap{padding:0 22px}.roi-lab{flex-direction:column;align-items:flex-start;gap:8px}.roi-def{grid-template-columns:minmax(0,1fr)}.roi-def dd{white-space:normal}}
@media(prefers-reduced-motion:reduce){.roi-mark .draw{stroke-dashoffset:0}.roi-mark.on .rock{animation:none}}