:root{--pink:#db2777;--ink:var(--color-text);--slate:var(--color-secondary);--mut:var(--color-text-light);--line:var(--color-border);--soft:var(--color-bg-alt);--bg:var(--color-bg-alt);--card:var(--color-surface);--ok:#16a34a}
*{box-sizing:border-box}
.tco{max-width:1240px;margin:0 auto;padding:1.6rem 1.4rem 4rem}
.tco-intro h1{font-size:clamp(1.4rem,3vw,1.85rem);margin:.2rem 0 .35rem;color:var(--ink)}
.tco-intro p{color:var(--slate);max-width:76ch;margin:0 0 1rem;font-size:.95rem}
.tco-caveat{font-size:.82rem;color:var(--mut);background:var(--color-surface);border:1px dashed var(--line);border-radius:8px;padding:.6rem .8rem;max-width:82ch;margin:0 0 1.3rem}

input,select{font:inherit}
input.num{width:5rem}
.tco input,.tco select{font-weight:600;padding:.26rem .4rem;border:1px solid var(--color-border);border-radius:7px;background:var(--color-surface);color:var(--ink)}
.tco input[type=checkbox]{width:auto;padding:0}

/* setup strip */
.setup{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.7rem 1rem;margin:0 0 1.1rem;display:flex;flex-wrap:wrap;gap:1rem 1.3rem;align-items:flex-end}
.setup .h{font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--mut);width:100%;margin-bottom:-.2rem}
.f{display:flex;flex-direction:column;gap:.2rem}
.f>label{font-size:.76rem;color:var(--slate)}
.f>label small{color:var(--mut)}
.f .in{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem}
.setup select{max-width:34rem}
.f input.case-name{width:16rem}
.f.usage input.unit{width:7rem}
.f.usage input.driver{width:13rem}
.tco input.missing{border-color:#dc2626;background:light-dark(#fef2f2,#2a1414)}
.u{font-size:.76rem;color:var(--mut);font-weight:500}
.acts{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin-left:auto}
.act{font:inherit;font-size:.8rem;font-weight:600;padding:.38rem .7rem;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface);color:var(--ink);cursor:pointer;white-space:nowrap}
.act:hover{border-color:var(--slate)}
.act.primary{background:light-dark(#1e293b,#334155);border-color:light-dark(#1e293b,#475569);color:#fff}
.act.danger{color:light-dark(#b91c1c, #e09999);border-color:#fecaca}
.act.go{background:var(--pink);border-color:var(--pink);color:#fff;font-weight:700}
.act.go:hover{background:#be185d;border-color:#be185d}
.act.go-alt{border:1.5px solid var(--pink);color:var(--pink);font-weight:700}
.act.go-alt:hover{background:light-dark(#fdf2f8,#2a1422)}
.case-row{gap:.5rem}

/* labelled inputs */
.fld{display:inline-flex;align-items:center;gap:.3rem;font-size:.8rem}
.fld .k{font-size:.72rem;color:var(--mut);font-weight:500}
.fld .k:empty{display:none}

/* options: one column per option */
.opts-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:12px}
table.opts{border-collapse:separate;border-spacing:0;min-width:100%;font-size:.84rem}
table.opts th,table.opts td{padding:.5rem .7rem;vertical-align:top;border-top:1px solid var(--soft);text-align:left}
table.opts .rowh{position:sticky;left:0;z-index:1;background:var(--color-surface);width:16rem;min-width:14rem;font-weight:600;color:var(--ink);border-right:1px solid var(--line)}
table.opts .rowh small{display:block;font-weight:400;color:var(--mut);font-size:.72rem;margin-top:.1rem}
table.opts td.cell{min-width:17rem;border-left:1px solid var(--soft)}
table.opts td.pad{width:100%}
table.opts tr.head th{border-top:none;background:var(--color-bg-alt);vertical-align:bottom}
table.opts tr.head .corner{font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.opt-top{display:flex;align-items:center;gap:.3rem}
.tco input.opt-name{width:100%;min-width:11rem;font-weight:700;font-size:.92rem;border-color:transparent;border-bottom:1px dashed var(--color-border);border-radius:0;background:transparent;padding-left:0}
.opt-tot{font-size:.8rem;color:var(--slate);font-weight:700;margin-top:.2rem;font-variant-numeric:tabular-nums}
.opt-tot small{font-weight:400;color:var(--mut)}
table.opts th.add-col{min-width:9rem}
table.opts tr.grp th{background:var(--bg);padding:.55rem .7rem .4rem;border-top:1px solid var(--line)}
table.opts tr.grp th span{position:sticky;left:.7rem;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate);font-weight:700}
table.opts tr.grp th small{text-transform:none;letter-spacing:0;font-weight:400;color:var(--mut);margin-left:.5rem}
.line-top{display:flex;align-items:center;gap:.3rem}
.tco input.line-name{width:100%;min-width:9rem}
table.opts tr.addrow th,table.opts tr.addrow td{border-top:none;padding-top:.1rem}
.add{border:1.5px dashed var(--color-border);background:var(--color-surface);color:var(--slate);border-radius:8px;padding:.3rem .6rem;font-weight:600;cursor:pointer;font-size:.78rem}
.na{border:1px dashed var(--line);background:none;color:var(--mut);border-radius:7px;padding:.25rem .6rem;cursor:pointer;font-size:.78rem}
.na:hover{border-color:var(--slate);color:var(--ink)}
.rm{border:none;background:none;color:var(--mut);cursor:pointer;font-size:1.05rem;line-height:1;padding:0 .2rem}
.rm:hover{color:light-dark(#b91c1c, #e09999)}
.cost{position:relative;display:grid;gap:.3rem;padding-right:1.2rem}
.cost .cr{display:flex;flex-wrap:wrap;gap:.3rem .7rem;align-items:center}
.cost input.amt{width:4.8rem}
.cost input.life{width:4.4rem}
.cost select{max-width:8rem}
.cost .sub .fld{font-size:.74rem;color:var(--slate)}
.cost fieldset.first{display:block;border:none;margin:0;padding:0}
.cost fieldset.first legend{padding:0;margin-bottom:.1rem;font-size:.72rem;color:var(--mut)}
.cost fieldset.first .fld{margin-right:.7rem;white-space:nowrap}
.cost .res{font-size:.74rem;color:var(--mut);font-variant-numeric:tabular-nums}
.cost .res b{color:var(--ink)}
.cost .cell-rm{position:absolute;top:0;right:0}
.calc{font-size:.78rem;color:var(--slate)}

/* comparison */
.cmp{margin-top:1.6rem;border-top:2px solid var(--ink);padding-top:1rem}
.cmp h3{font-size:1rem;margin:0 0 .3rem}
.cmp .sub{font-size:.84rem;color:var(--slate);margin:0 0 .9rem}
.tbars{display:grid;gap:.8rem}
.tbar{display:grid;grid-template-columns:14rem 1fr 7rem;gap:.8rem;align-items:center;font-size:.86rem}
.tbar .nm{font-weight:600;color:var(--ink)}
.tbar .nm.best::after{content:" · lowest";color:var(--ok);font-size:.74rem;font-weight:700}
.tbar .track{display:flex;height:1.5rem;border-radius:6px;overflow:hidden;background:var(--soft)}
.tbar .seg{height:100%}
.tbar .tot{font-weight:700;font-variant-numeric:tabular-nums;text-align:right}
.legend{display:flex;flex-wrap:wrap;gap:.9rem;font-size:.76rem;color:var(--slate);margin:.7rem 0 0}
.legend i{display:inline-block;width:.75rem;height:.75rem;border-radius:3px;vertical-align:-1px;margin-right:.3rem}
.res-wrap{overflow-x:auto;margin-top:1rem}
table.res{border-collapse:collapse;font-size:.84rem;min-width:100%}
table.res th,table.res td{padding:.3rem .6rem;border-bottom:1px solid var(--soft);text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.res th[scope=row]{text-align:left;font-weight:500;color:var(--slate)}
table.res th[scope=col]{color:var(--ink)}
table.res td{font-weight:600}
table.res td small{font-weight:400;color:var(--mut)}
table.res tr.t th,table.res tr.t td{border-top:2px solid var(--ink);font-weight:700;color:var(--ink)}
.lowest{color:var(--ok);font-size:.72rem;font-weight:700}
.verdict{background:var(--color-bg-alt);border:1px solid var(--line);border-left:3px solid var(--pink);border-radius:10px;padding:.85rem 1rem;margin:1rem 0 0;font-size:.9rem;color:var(--slate)}
.verdict b{color:var(--ink)}

/* breakeven chart */
.sweep{margin-top:1.6rem;border-top:2px solid var(--ink);padding-top:1rem}
.sweep-h{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;justify-content:space-between;margin-bottom:.5rem}
.sweep-h h3{font-size:1rem;margin:0}
.chart svg{width:100%;height:auto;display:block}
.chart .grid{stroke:var(--soft)}
.chart .tick{font-size:11px;fill:var(--mut);font-variant-numeric:tabular-nums}
.chart .axis{font-size:12px;fill:var(--slate)}
.chart .end{font-size:12px;font-weight:700}
.chart .now{stroke:var(--mut);stroke-dasharray:4 4}
.chart .cross{fill:var(--color-surface);stroke:var(--ink);stroke-width:2}
.sweep-msg{font-size:.9rem;color:var(--slate);margin:.6rem 0 0}
.sweep-msg b{color:var(--ink)}

.formulas{font-size:.78rem;color:var(--mut);margin-top:1.6rem;border-top:1px solid var(--line);padding-top:1rem}
.formulas code{background:var(--soft);padding:.05rem .35rem;border-radius:4px;color:var(--color-text)}
.formulas .row{margin:.2rem 0}

@media(max-width:860px){.tbar{grid-template-columns:1fr;gap:.3rem}table.opts .rowh{width:9rem;min-width:9rem}}
@media print{nav.navbar,.tool-breadcrumbs,.setup,.add,.na,.rm,.acts,.formulas,.sweep-h select,th.add-col{display:none !important}.tco{padding:0}.opts-wrap,.res-wrap{overflow:visible}}