@scope (#calculator) {

@font-face{font-family:Newsreader;src:url('/assets/fonts/Newsreader-Variable.woff2')}@font-face{font-family:DM;src:url('/assets/fonts/DMSans-Regular.woff2')}@font-face{font-family:DM;src:url('/assets/fonts/DMSans-Medium.woff2');font-weight:500}
:scope{--paper:#f1f1f3;--card:#fff;--well:#f5f5f6;--ink:#0b0b0c;--muted:#6c6c71;--line:#e5e5e8;--accent:#32664d;--serif:Newsreader,Georgia,serif;--sans:DM,system-ui,sans-serif;color-scheme:light}*{box-sizing:border-box}:scope{margin:0;background:var(--paper);color:var(--ink);font:15px/1.5 var(--sans)}button,input,select{font:inherit;color:inherit}input,select{color:var(--ink)}button,a,select,input[type=range]{-webkit-tap-highlight-color:transparent}button,a{cursor:pointer}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button{border:0}input,select{min-width:0;width:100%;border:1px solid var(--line);border-radius:10px;background:var(--well);padding:10px 12px;height:44px}input[aria-invalid=true]{outline:2px solid #b94b42}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='m1 1 5 5 5-5' fill='none' stroke='%23808085' stroke-width='1.5'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:32px}input[type=number]{appearance:textfield}input::-webkit-inner-spin-button{appearance:none}label{display:grid;gap:6px;font-size:12px;color:var(--muted)}fieldset{border:0;padding:0;margin:0;min-width:0}h1,h2,h3,p{margin:0}h1{font:400 clamp(36px,5vw,56px)/1.02 var(--serif);letter-spacing:-.025em}h2{font-size:18px;font-weight:500}h3{font-size:14px;font-weight:500}.label{text-transform:uppercase;letter-spacing:.13em;font-size:10px;font-weight:500;color:var(--muted)}.muted,.note{color:var(--muted)}.note{font-size:12px;line-height:1.6}.serif{font-family:var(--serif)}.number{font:400 44px/1 var(--serif);font-variant-numeric:tabular-nums;letter-spacing:-.025em}.large{font-size:64px}.card{background:var(--card);border-radius:24px;padding:26px;min-width:0}.head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stack{display:grid;gap:16px}.gap{margin-top:20px}.rule{border-top:1px solid var(--line);padding-top:18px;margin-top:18px}.calc-pill{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:999px;background:var(--ink);color:var(--card);text-decoration:none;font-size:12px;white-space:nowrap}.quiet{background:transparent;color:var(--muted);padding:0;text-decoration:underline;text-underline-offset:4px;font-size:12px}.calc-units{display:flex;gap:3px;background:var(--well);padding:3px;border-radius:99px}.calc-units button{background:none;padding:6px 12px;border-radius:99px;font-size:12px}.calc-units button[aria-pressed=true]{background:var(--ink);color:var(--card)}.site-nav{max-width:1120px;margin:auto;padding:24px 24px;display:flex;justify-content:space-between;align-items:center}.wordmark{font:30px var(--serif);text-decoration:none}.nav-links{display:flex;gap:24px;align-items:center;font-size:12px}.page{max-width:1100px;margin:28px auto 0;padding:0 24px 110px}.intro{margin-bottom:28px;display:flex;justify-content:space-between;align-items:end;gap:20px}.intro p{margin-top:10px;color:var(--muted)}.design-note{border-top:1px solid var(--line);margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.race-form{display:grid;grid-template-columns:1fr 1.2fr;gap:12px}.race-form .time{font:36px var(--serif);height:58px;padding:8px 12px}.race-form select{height:58px;font-size:14px}.race-form label{align-content:start}.card .label+.race-form{margin-top:14px}.ruler{width:100%;height:34px;padding:0;border:0;background:none;accent-color:var(--ink);cursor:ew-resize}.ruler-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.gap-badge{display:inline-block;background:#edf3ef;color:#32664d;border-radius:99px;padding:5px 10px;font-size:11px}.status:empty{display:none}.status{min-height:20px;color:var(--muted);font-size:12px;margin-top:10px}.table-wrap{overflow-x:auto}.equivalents{width:100%;border-collapse:collapse;table-layout:fixed;font-variant-numeric:tabular-nums}.equivalents th,.equivalents td{padding:16px 8px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}.equivalents th:first-child{width:25%;text-align:left;padding-left:0}.equivalents th:last-child,.equivalents td:last-child{padding-right:0}.equivalents thead th{font-size:10px;font-weight:400;color:var(--muted);padding-top:6px;padding-bottom:10px}.equivalents tbody th{font-size:13px;font-weight:500}.equivalents tbody td{font-size:14px}.equivalents tbody tr.is-goal{background:var(--well)}.equivalents tbody tr.is-goal th{padding-left:8px}.equivalents small{display:block;color:var(--muted);font-size:10px}.conditions summary{cursor:pointer;font-weight:500;font-size:13px}.conditions summary::marker{color:var(--muted)}.condition-fields{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}.conditions .pair{gap:8px}.conditions input,.conditions select{font-size:12px;padding:8px;height:38px}.conditions select{padding-right:25px}.conditions fieldset>label+label{margin-top:8px}.conditions legend{font-size:11px;font-weight:500;margin-bottom:8px}.conditions [hidden]{display:none}.conditions .custom{margin-top:10px}.road{height:150px;position:relative;overflow:hidden}.road svg{width:100%;height:100%;overflow:visible}.road .base{fill:none;stroke:var(--line);stroke-width:9;stroke-linecap:round}.road .trace{fill:none;stroke:var(--ink);stroke-width:2.4;stroke-linecap:round}.road text{font:10px var(--sans);fill:var(--muted)}.road circle{fill:var(--ink)}.forecast .number{margin-top:12px}.forecast .note{margin-top:8px}.breakdown{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.breakdown span{font-size:10px;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:5px 8px}.train-link{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);margin-top:20px;padding-top:16px;text-decoration:none;font-size:12px}.train-link span{color:var(--muted)}.training{max-width:850px}.training table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}.training th,.training td{text-align:right;padding:13px 8px;border-bottom:1px solid var(--line);font-size:14px}.training th:first-child{text-align:left}.training th{font-weight:500}.training thead th{font-size:11px;color:var(--muted)}.training caption{text-align:left;font-weight:500;padding-bottom:14px}.training .rep-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}.zone-key{display:flex;height:32px;gap:3px;margin:18px 0}.zone-key span{flex:1;border-radius:5px;color:white;display:grid;place-content:center;font-size:10px}
/* 1: paired race cards, compact lower split. */
.compare .race-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare .goal-card{background:#e8ece8}.compare .lower{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,1fr);gap:16px;margin-top:16px}.compare .condition-fields{grid-template-columns:repeat(4,1fr)}.compare .forecast .road{height:165px}
/* 2: a stable control rail and one dense ledger. */
.ledger{max-width:1000px}.ledger .intro h1{font:500 28px var(--sans)}.ledger .ledger-grid{display:grid;grid-template-columns:280px minmax(0,1fr);gap:24px}.ledger .card{border-radius:16px;padding:22px}.ledger .race-form{grid-template-columns:1fr}.ledger .race-form label{display:flex;justify-content:space-between;align-items:center;gap:10px}.ledger .race-form input,.ledger .race-form select{width:155px;height:42px;font-size:18px}.ledger .condition-fields{grid-template-columns:1fr}.ledger .equivalents th,.ledger .equivalents td{padding-block:13px}.ledger .forecast{display:grid;grid-template-columns:1fr 180px;align-items:center}.ledger .forecast .road{height:105px}.ledger .forecast .breakdown{grid-column:1/-1}
/* 3: destination foreground, evidence in the side rail. */
.goal-first .hero-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(250px,1fr);gap:18px}.goal-first .goal-hero{background:#161b18;color:#f6f6f3;padding:34px;--muted:#acb6af;--line:#3d4841;--well:#252e28;--ink:#f6f6f3;--card:#161b18}.goal-first .goal-hero .race-form{max-width:430px}.goal-first .goal-hero .race-form .time{font-size:48px;height:68px}.goal-first .goal-hero .race-form select{height:68px}.goal-first .goal-hero .road{height:120px}.goal-first .goal-hero .ruler{accent-color:#dce7dc}.goal-first .goal-hero input,.goal-first .goal-hero select{color-scheme:dark}.goal-first .forecast .number{font-size:40px}.goal-first .results{max-width:800px;margin:24px auto 0}.goal-first .conditions{margin-top:18px}
/* 4: editorial horizontal narrative, restrained ink rules. */
.story{max-width:1000px;background:var(--card);padding:36px 36px 100px;border-radius:24px}.story .intro{border-bottom:1px solid var(--line);padding-bottom:24px}.story .story-flow{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}.story .story-flow>section{padding:0 20px 0 0;border-right:1px solid var(--line)}.story .story-flow>section:last-child{border-right:0;padding-right:0}.story .race-form{grid-template-columns:1fr}.story .race-form label{gap:4px}.story .race-form select{height:38px}.story .race-form .time{height:52px}.story .forecast .number{font-size:48px}.story .forecast .road{height:105px}.story .conditions{border-block:1px solid var(--line);padding-block:18px;margin:26px 0}.story .story-bottom{display:grid;grid-template-columns:1fr 260px;gap:36px}.story .story-aside{font:24px/1.25 var(--serif);padding-top:30px}.story .story-aside p{font:12px/1.7 var(--sans);color:var(--muted);margin-top:12px}
/* 5: task-focused workbench with a map in the center. */
.workbench{max-width:1180px}.workbench .bench{display:grid;grid-template-columns:250px minmax(0,1fr) 280px;gap:14px}.workbench .bench .race-form{grid-template-columns:1fr}.workbench .bench .card{padding:24px}.workbench .map-card{background:#e9ece8}.workbench .map-card .road{height:190px}.workbench .map-card .number{font-size:52px}.workbench .bench-results{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:14px;margin-top:14px}.workbench .condition-fields{grid-template-columns:1fr 1fr}.workbench .bench-results .conditions{padding:24px}.workbench .intro h1{font-size:42px}.workbench .bench-results .table-card{padding-inline:30px}
@media(max-width:900px){.workbench .bench{grid-template-columns:1fr 1fr}.workbench .map-card{grid-column:1/-1;grid-row:2}.workbench .map-card .road{height:130px}.workbench .bench-results{grid-template-columns:1fr}.workbench .condition-fields{grid-template-columns:repeat(4,1fr)}}
@media(max-width:680px){.site-nav{padding:18px 20px}.nav-links{gap:14px}.page{padding:0 16px 120px;margin-top:18px}.intro{display:block}.intro h1{font-size:36px}.intro .calc-units{width:fit-content;margin-top:16px}.intro p{font-size:13px}.card{padding:20px}.number{font-size:38px}.large{font-size:48px}.compare .race-pair,.compare .lower,.ledger .ledger-grid,.goal-first .hero-grid,.story .story-flow,.story .story-bottom,.workbench .bench,.workbench .bench-results{grid-template-columns:1fr}.ledger .race-form{grid-template-columns:1fr 1fr}.ledger .race-form label{display:grid}.ledger .race-form input,.ledger .race-form select{width:100%;height:50px}.ledger .condition-fields,.condition-fields,.workbench .condition-fields{grid-template-columns:1fr 1fr}.compare .lower .forecast{grid-row:1}.compare .condition-fields{grid-template-columns:1fr 1fr}.goal-first .goal-hero{padding:24px}.goal-first .results{margin-top:18px}.story{margin-inline:12px;padding:24px 20px 120px}.story .story-flow>section{border:0;border-bottom:1px solid var(--line);padding:0 0 22px}.story .story-flow>section:last-child{border:0}.story .race-form{grid-template-columns:1fr 1fr}.story .story-aside{padding-top:0}.story .story-bottom{gap:24px}.workbench .map-card{grid-column:auto;grid-row:auto}.workbench .bench .race-form{grid-template-columns:1fr 1fr}.workbench .bench-results .table-card{padding:20px}.equivalents th:first-child{width:24%}.equivalents th,.equivalents td{padding:13px 4px}.equivalents tbody th{font-size:11px}.equivalents tbody td{font-size:12px}.equivalents thead th{font-size:9px}.design-note{flex-direction:column;gap:8px}.training .rep-grid{grid-template-columns:1fr}.training th,.training td{font-size:12px;padding:12px 4px}.nav-links .desktop{display:none}}

.page.flow{max-width:850px}.flow .intro{margin-bottom:26px}.flow .steps{display:flex;gap:10px;align-items:center;margin-bottom:20px}.step{display:grid;place-content:center;border:1px solid var(--line);border-radius:50%;width:25px;height:25px;font-size:12px;color:var(--muted)}.chips{display:flex;gap:6px;flex-wrap:wrap}.chips button{flex:1;padding:10px 12px;border-radius:10px;background:var(--well);font-size:13px;white-space:nowrap}.chips button[aria-pressed=true]{background:var(--ink);color:var(--card)}.goal-entry{display:grid;grid-template-columns:1fr 240px;align-items:end;gap:24px}.condition-row{padding:20px 0;border-top:1px solid var(--line)}.condition-row .head{margin-bottom:12px}.condition-row:first-child{border-top:0}.condition-row input[type=range]{accent-color:var(--ink);height:28px;padding:0;border:0;background:none}.value{font-variant-numeric:tabular-nums;color:var(--ink);font-size:14px}.result{background:#e8eee8;padding:26px;border-radius:18px;text-align:center;margin-top:10px}.result .number{font-size:64px;margin:14px 0}.result .breakdown{justify-content:center}.recent-section{margin-top:38px}.recent-form{margin-top:20px}.flow .equivalents th:first-child{width:24%}.flow .equivalents tbody td{font-size:13px}.flow .comparison{margin-top:20px}.flow .number{color:var(--ink)}.status:empty{display:none}.condition-row .pair{margin-top:12px}.condition-row label{gap:10px}.flow [hidden]{display:none!important}@media(max-width:600px){.goal-entry{grid-template-columns:1fr;gap:16px}.chips button{padding:10px 8px;font-size:12px}.result .number{font-size:52px}.flow .equivalents td{font-size:11px!important}.flow .card{padding:20px}.flow .pair{gap:10px}}

/* Shared controls: stable touch target, fine track and compact choices. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.flow .chips{display:inline-flex;max-width:100%;width:fit-content;gap:3px;padding:3px;background:var(--well);border-radius:999px;flex-wrap:nowrap}
.flow .chips button{flex:0 1 auto;min-height:34px;padding:7px 14px;border-radius:999px;background:transparent;font-size:12px;line-height:1.3}
.flow .chips button[aria-pressed=true]{background:var(--ink);color:var(--card)}
.flow .condition-row input[type=range]{appearance:none;-webkit-appearance:none;display:block;width:100%;height:32px;margin:2px 0 10px;border:0;padding:0;background:transparent;cursor:pointer;--fill:0%}
.flow input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:4px;background:linear-gradient(to right,var(--ink) 0 var(--fill),var(--line) var(--fill) 100%)}
.flow input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--card);border:1px solid #c6c6cb;box-shadow:0 1px 3px #0002;margin-top:-7px}
.flow input[type=range]::-moz-range-track{height:4px;border-radius:4px;background:var(--line)}
.flow input[type=range]::-moz-range-progress{height:4px;background:var(--ink)}
.flow input[type=range]::-moz-range-thumb{width:18px;height:18px;box-sizing:border-box;border-radius:50%;background:var(--card);border:1px solid #c6c6cb;box-shadow:0 1px 3px #0002}
.flow .condition-row{min-width:0}.flow .condition-row .head{margin-bottom:8px}.flow .value{font-size:13px}.flow .condition-row h3{font-size:14px}.flow .goal-entry .chips button,.flow .recent-form>.chips button{padding-inline:15px}
.flow .result{background:var(--well);text-align:left;margin-top:24px;padding:26px;border-radius:18px}
.math{display:grid;grid-template-columns:1fr minmax(210px,1.15fr) 1fr;gap:24px;align-items:center}
.math .number{font-size:42px;margin:12px 0 8px;white-space:nowrap}.math-end{border-left:1px solid var(--line);padding-left:24px}.math-end .number{color:#32664d}.math-adjustments{display:grid;gap:12px}.math-term{display:grid;grid-template-columns:72px 1fr;gap:10px;align-items:baseline}.math-term strong{font:500 17px var(--sans);font-variant-numeric:tabular-nums;text-align:right}.math-term span{font-size:12px}.math-term small{display:block;font-size:10px;color:var(--muted)}.math-term.zero{color:var(--muted)}.math-end .label::before{content:'= ';font-size:16px;color:var(--ink)}
.flow .equivalents th,.flow .equivalents td{padding-inline:12px}.flow .equivalents th:last-child,.flow .equivalents td:last-child{padding-right:18px}.flow .equivalents th:first-child{padding-left:12px;width:22%}.flow .equivalents tbody tr.is-goal th{padding-left:12px}
.design-caption{font-size:12px;color:var(--muted);margin:0 0 18px}.flow{padding-bottom:130px!important}.conditions-grid{display:grid;gap:0}.condition-nav{display:none}
/* Compact: four controls in a two-by-two working area. */
.layout-0{max-width:960px!important}.layout-0 .conditions-grid{grid-template-columns:1fr 1fr;gap:0 30px}.layout-0 .condition-row{border-top:0;border-bottom:1px solid var(--line);padding:18px 0}.layout-0 .result{margin-top:22px}
/* Rows: label and live value left, controls right. */
.layout-1{max-width:960px!important}.layout-1 .condition-row{display:grid;grid-template-columns:170px minmax(0,1fr);gap:6px 28px;align-items:center;padding:18px 0}.layout-1 .condition-row>.head{grid-column:1;grid-row:1/3;display:block}.layout-1 .head .value,.layout-1 .head [data-course-note]{display:block;margin-top:7px}.layout-1 .condition-row>label,.layout-1 .condition-row>input,.layout-1 .condition-row>.chips,.layout-1 .condition-row>.pair{grid-column:2}.layout-1 .condition-row>.chips{justify-self:start}
/* Cards: each condition has its own outlined tile. */
.layout-2{max-width:1100px!important}.layout-2 .conditions-grid{grid-template-columns:1fr 1fr;gap:14px}.layout-2 .condition-row{border:1px solid var(--line);padding:20px;border-radius:16px}.layout-2 .condition-row:first-child{border-top:1px solid var(--line)}.layout-2 .result{background:#e9eee9}.layout-2 .goal-entry{grid-template-columns:1fr 290px}
/* Sheet: narrow app-like grouped rows and a receipt below. */
.layout-3{max-width:650px!important}.layout-3 .intro h1{font-size:42px}.layout-3 .intro{display:block}.layout-3 .intro>.chips{margin-top:16px}.layout-3 .goal-entry{grid-template-columns:1fr}.layout-3 .condition-row{padding:18px 0}.layout-3 .condition-row>.chips{margin-top:0}.layout-3 .math{grid-template-columns:1fr}.layout-3 .math-start{display:flex;justify-content:space-between;align-items:center}.layout-3 .math-start .note{display:none}.layout-3 .math-adjustments{border-block:1px solid var(--line);padding-block:18px}.layout-3 .math-term{grid-template-columns:1fr auto}.layout-3 .math-term strong{grid-column:2;grid-row:1}.layout-3 .math-term span{grid-column:1;grid-row:1}.layout-3 .math-end{border:0;padding:0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.layout-3 .math-end .note{width:100%}.layout-3 .math .number{font-size:38px;margin:0}
/* Focus: one condition at a time, always followed by the full equation. */
.layout-4{max-width:960px!important}.layout-4 .condition-nav{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}.condition-nav button{padding:10px 16px;border-radius:99px;background:var(--well);font-size:12px}.condition-nav button[aria-selected=true]{background:var(--ink);color:var(--card)}.layout-4 .conditions-grid{border:1px solid var(--line);border-radius:18px;padding:24px;min-height:175px}.layout-4 .condition-row{border:0;padding:0;max-width:540px;width:100%;margin:auto}.layout-4 .condition-row:first-child{border:0}.layout-4 .condition-row.inactive{display:none}
@media(max-width:700px){.flow .math{grid-template-columns:1fr;gap:18px}.flow .math-start{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.flow .math-start .note{display:none}.flow .math .number{font-size:38px;margin:0}.flow .math-adjustments{border-block:1px solid var(--line);padding-block:16px}.flow .math-term{grid-template-columns:1fr auto}.flow .math-term strong{grid-column:2;grid-row:1}.flow .math-term span{grid-column:1;grid-row:1}.flow .math-end{border:0;padding:0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.flow .math-end .note{width:100%;margin-top:8px}.flow .conditions-grid{grid-template-columns:1fr}.flow .chips button{padding-inline:10px;font-size:11px}.flow .goal-entry .chips button,.flow .recent-form>.chips button{padding-inline:10px}.layout-1 .condition-row{grid-template-columns:1fr;gap:4px}.layout-1 .condition-row>.head{grid-column:1;grid-row:auto;display:flex}.layout-1 .head .value{margin:0}.layout-1 .condition-row>label,.layout-1 .condition-row>input,.layout-1 .condition-row>.chips,.layout-1 .condition-row>.pair{grid-column:1}.layout-2 .goal-entry{grid-template-columns:1fr}.layout-2 .condition-row{padding:16px}.flow .equivalents{min-width:570px}.flow .equivalents th:first-child{position:sticky;left:0;background:var(--card)}.flow .equivalents .is-goal th:first-child{background:var(--well)}.layout-4 .conditions-grid{padding:18px}.flow .result{padding:20px}}
.proto-picker {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2147483647;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(10, 10, 10, 0.82);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  backdrop-filter: blur(12px) saturate(1.4);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08) inset,
    0 8px 24px rgba(0, 0, 0, 0.24),
    0 2px 6px rgba(0, 0, 0, 0.12);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  -webkit-user-select: none;
}

.proto-picker-highlight {
  position: absolute;
  top: 4px;
  left: 0;
  height: 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  will-change: transform;
}

/* The slide is enabled only after first paint (data-ready), so load doesn't animate. */
.proto-picker[data-ready] .proto-picker-highlight {
  transition:
    transform 250ms cubic-bezier(0.23, 1, 0.32, 1),
    width 250ms cubic-bezier(0.23, 1, 0.32, 1);
}

@media (prefers-reduced-motion: reduce) {
  .proto-picker[data-ready] .proto-picker-highlight { transition: none; }
}

.proto-picker-item {
  position: relative; /* sits above the highlight */
  display: flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  font: inherit;
  cursor: pointer;
  transition: color 150ms ease-out;
}

.proto-picker-item:hover {
  color: rgba(255, 255, 255, 0.85);
}

.proto-picker-item:active {
  transform: scale(0.97);
}

.proto-picker-item:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.4);
  outline-offset: 2px;
}

.proto-picker-item[data-active] {
  color: #fff;
}

.proto-picker-divider {
  width: 1px;
  height: 16px;
  margin: 0 4px;
  background: rgba(255, 255, 255, 0.12);
}

.proto-picker-replay {
  padding: 0 10px;
  font-size: 14px;
}

.proto-picker[data-position="top"] {
  bottom: auto;
  top: 24px;
}
.race-inputs,.race-result{display:contents}
.flow .equivalents{min-width:790px;table-layout:fixed}
.flow .equivalents th:first-child{width:auto}
.flow .equivalents thead tr:first-child th{font-size:11px;padding-bottom:9px;padding-top:0}
.flow .equivalents thead tr:first-child th[colspan]{text-align:center}
.flow .equivalents thead tr:nth-child(2) th{font-size:10px;font-weight:400;padding-top:10px}
.flow .equivalents .pace-start{border-left:1px solid var(--line);padding-left:18px}
.faster{color:#247047}.slower{color:#b13b39}.unchanged{color:var(--muted)}
.flow .equivalents td.faster,.flow .equivalents td.slower{font-weight:500}
.flow .equivalents th:last-child,.flow .equivalents td:last-child{padding-right:20px}
.layout-3{max-width:1120px!important;margin-top:8px}
.layout-3 .intro{display:flex;align-items:center;margin-bottom:16px}
.layout-3 .intro h1{font-size:36px}.layout-3 .intro p{margin-top:6px}.layout-3 .intro>.chips{margin:0}
.layout-3 .design-caption{margin-bottom:12px;font-size:11px}
.layout-3 .race-workspace{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(0,1fr);gap:20px;align-items:stretch;padding:0;background:none}
.layout-3 .race-inputs,.layout-3 .race-result{display:block;background:var(--card);border-radius:24px;padding:24px;min-width:0}
.layout-3 .race-result{position:sticky;top:24px}
.layout-3 .steps{margin-bottom:12px}.layout-3 .steps h2{font-size:16px}
.layout-3 .goal-entry{grid-template-columns:1fr 170px;gap:16px;align-items:end}

.layout-3 .goal-entry label{font-size:10px}
.layout-3 .goal-entry .label{font-size:9px;margin-bottom:10px!important}
.layout-3 .goal-entry .chips button{padding:7px 10px;font-size:11px;min-height:32px}
.layout-3 .rule{margin-top:16px;padding-top:16px}
.layout-3 .condition-row{padding:11px 0}
.layout-3 .condition-row .head{margin-bottom:4px}
.layout-3 .condition-row input[type=range]{height:26px;margin:0 0 5px}
.layout-3 .condition-row .chips button{min-height:32px;padding-block:6px}
.layout-3 .result{margin:0;padding:0;background:none}
.layout-3 .math{gap:22px}
.layout-3 .math-start{display:block}
.layout-3 .math-start .number{font-size:48px;margin:10px 0}
.layout-3 .math-start .note{display:block}
.layout-3 .math-adjustments{padding-block:22px;gap:22px}
.layout-3 .math-term strong{font-size:20px}
.layout-3 .math-term span{font-size:14px}
.layout-3 .math-term small{font-size:11px;margin-top:3px}
.layout-3 .math-end{display:block}
.layout-3 .math-end .number{font-size:52px;margin:12px 0}
.layout-3 .race-result>.note{font-size:11px;margin-top:22px;max-width:34em}
.layout-3 .recent-section{margin-top:24px}
.layout-3 .recent-form{display:grid;grid-template-columns:1fr 240px;gap:10px 24px;align-items:end}
.layout-3 .recent-form label.gap{margin:0}.layout-3 .recent-form .status{grid-column:1/-1}
@media(max-width:1000px) and (min-width:801px){.layout-3 .goal-entry{grid-template-columns:1fr}.layout-3 .chips button{font-size:11px;padding-inline:9px}}
@media(max-width:800px){.layout-3 .intro{display:block}.layout-3 .intro>.chips{margin-top:12px}.layout-3 .race-workspace{grid-template-columns:1fr;gap:16px}.layout-3 .race-inputs,.layout-3 .race-result{padding:20px}.layout-3 .race-result{position:static}.layout-3 .goal-entry{grid-template-columns:1fr}.layout-3 .condition-row{padding-block:15px}.layout-3 .recent-form{grid-template-columns:1fr}.layout-3 .math-start,.layout-3 .math-end{display:flex;justify-content:space-between;flex-wrap:wrap;align-items:center}.layout-3 .math-start .note{width:100%}.layout-3 .math-start .number,.layout-3 .math-end .number{font-size:38px;margin:0}.layout-3 .math-start .note,.layout-3 .math-end .note{margin-top:8px}.flow .equivalents thead tr:nth-child(2) th:first-child{position:static;background:transparent}.flow .equivalents tbody th:first-child,.flow .equivalents thead tr:first-child th:first-child{position:sticky;left:0;background:var(--card)}.flow .equivalents tbody .is-goal th{background:var(--well)}}

@media(min-width:1100px) and (max-height:950px){
body:has(.layout-3) .site-nav{padding-block:12px}
.layout-3{margin-top:0}.layout-3 .intro{margin-bottom:10px}.layout-3 .intro h1{font-size:32px}.layout-3 .design-caption{margin-bottom:8px;font-size:10px}
.layout-3 .race-inputs,.layout-3 .race-result{padding:20px}
.layout-3 .condition-row{padding-block:8px}.layout-3 .condition-row input[type=range]{height:24px;margin-bottom:4px}.layout-3 .condition-row .chips button{min-height:30px}
.layout-3 .math{gap:18px}.layout-3 .math-adjustments{gap:18px;padding-block:18px}.layout-3 .math-end .number{font-size:46px}.layout-3 .race-result>.note{margin-top:16px}
}

.flow .clock-action{min-width:0;width:210px;display:grid;gap:10px}
.flow .clock-group{min-width:0;margin:0;padding:0;border:0}
.flow .clock-group legend{font:11px var(--sans);color:var(--muted);margin-bottom:9px;padding:0}
.flow .clock-fields{display:grid;grid-template-columns:1fr 10px 1fr 10px 1fr;gap:3px;align-items:start}
.flow .clock-fields label{display:grid;grid-template-columns:minmax(0,1fr);min-width:0;gap:4px;text-align:center;color:var(--muted);font-size:10px}
.flow .clock-fields input{appearance:none;-webkit-appearance:none;display:block;box-sizing:border-box;min-width:0;width:100%;height:48px;margin:0;padding:0;text-align:center;font:30px/1 var(--serif);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";color:var(--ink);border:1px solid var(--line);border-radius:10px;background:var(--well)}
.flow .clock-colon{font:26px/48px var(--serif);text-align:center;color:var(--muted)}
.flow .calculate{height:36px;padding:8px 14px;border-radius:99px;background:var(--ink);color:var(--card);font:12px var(--sans);white-space:nowrap}
.flow .goal-entry{align-items:start}.flow .goal-entry>div:first-child{padding-top:2px}
.layout-3 .goal-entry{grid-template-columns:minmax(0,1fr) 210px;gap:20px}
.layout-3 .recent-form{display:grid;grid-template-columns:max-content 210px;gap:12px 32px;justify-content:start;align-items:start}
.flow .recent-distance>.label{margin:2px 0 10px;font-size:10px}
.layout-3 .recent-form>.status{grid-column:1/-1}
@media(max-width:1000px){.layout-3 .goal-entry{grid-template-columns:1fr}.layout-3 .recent-form{grid-template-columns:1fr;gap:20px}.flow .clock-action{width:240px;max-width:100%}}
@media(min-width:1100px) and (max-height:950px){body:has(.layout-3) .site-nav{padding-block:8px}.layout-3 .design-caption{display:none}.layout-3 .clock-fields input{height:42px;font-size:28px}.layout-3 .clock-colon{line-height:42px}.layout-3 .clock-group legend{margin-bottom:6px}.layout-3 .clock-action{gap:6px}.layout-3 .calculate{height:32px}.layout-3 .condition-row{padding-block:6px}.layout-3 .rule{margin-top:12px;padding-top:12px}}

@media(min-width:1001px){
  .layout-3 .recent-form{grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);gap:24px;align-items:start}
  .layout-3 .recent-form .clock-action{width:100%;display:grid;grid-template-columns:210px minmax(0,1fr);gap:24px;align-items:center}
  .layout-3 .recent-form .calculate{margin-top:4px}
}
.flow .intro [data-choice="unit"]{background:transparent}
.flow .intro .chips:has([data-choice="unit"]){background:#fff}
.flow .intro [data-choice="unit"][aria-pressed="true"]{background:#0b0b0c;color:#fff}

/* Reserve separate columns so signs stay fixed as durations change. */
.layout-3 .math-term{grid-template-columns:minmax(0,1fr) 1ch 8ch;column-gap:10px}
.layout-3 .math-term .math-sign{grid-column:2;grid-row:1;text-align:center}
.layout-3 .math-term .math-value{grid-column:3;grid-row:1;text-align:right}

@media(prefers-color-scheme:dark){
.flow .intro .chips:has([data-choice="unit"]){background:var(--well)}
.flow .intro [data-choice="unit"][aria-pressed="true"]{background:var(--ink);color:var(--card)}
}

.layout-3 .comparison>.head{flex-wrap:wrap}
.layout-3 .comparison>.head .chips{flex-shrink:0;margin-left:auto}

.layout-3 .condition-unit-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}
.layout-3 .condition-unit-row .chips{flex-shrink:0}

}
#calculator{padding-top:90px}

@media(prefers-color-scheme:dark){#calculator{--paper:#000;--card:#171719;--well:#242427;--ink:#f3f2ee;--muted:#aaaab0;--line:#36363b;--accent:#8bb59a;color-scheme:dark;color:var(--ink);background:var(--paper)}}