/* Shared calculator UI: restrained, readable, thumb-friendly */
:root{--bg:#fff;--ink:#171717;--mute:#68686f;--line:#e6e6e8;--fill:#f2f2f4;--acc:#1a1a1a;--seg:#fff;box-sizing:border-box}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#111;--ink:#f3f3f3;--mute:#a0a0a6;--line:#333;--fill:#252528;--acc:#f2f2f3;--seg:#444}}
:root[data-theme=dark]{--bg:#111;--ink:#f3f3f3;--mute:#a0a0a6;--line:#333;--fill:#252528;--acc:#f3f3f3;--seg:#444}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}[hidden]{display:none!important}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);font:100%/1.5 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
nav{display:flex;align-items:center;gap:1.25rem;padding:16px max(20px,calc((100% - 560px)/2));font-size:.8rem}nav a{color:var(--mute);text-decoration:none}nav a:hover{color:var(--ink)}nav .brand{font-weight:500;color:var(--ink);margin-right:auto}nav .brand .logo{display:block;height:22px;width:auto}nav .brand .logo-dark{display:none}:root[data-theme=dark] nav .brand .logo-light{display:none}:root[data-theme=dark] nav .brand .logo-dark{display:block}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) nav .brand .logo-light{display:none}:root:not([data-theme=light]) nav .brand .logo-dark{display:block}}
.tool-page{width:min(100% - 40px,560px);margin:0 auto;padding-bottom:60px}.back{display:inline-block;margin:25px 0 28px;color:var(--mute);text-decoration:none;font-size:.78rem}.back:hover{color:var(--ink)}.tool-page-head{margin-bottom:25px}.tool-eyebrow{font-size:.66rem;letter-spacing:.09em;color:var(--mute);margin:0 0 7px}.tool-h{font-size:clamp(1.8rem,5vw,2.4rem);line-height:1.1;letter-spacing:-.05em;font-weight:500;margin:0}
section{padding:0;margin:0}h2{font-size:.88rem;font-weight:500;color:var(--mute);margin:0 0 1.2rem}.bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.seg{position:relative;display:inline-grid;grid-auto-flow:column;grid-auto-columns:1fr;background:var(--fill);border-radius:999px;padding:3px;max-width:100%}.seg i{position:absolute;top:3px;bottom:3px;left:0;background:var(--seg);border-radius:999px;box-shadow:0 1px 3px #00000012;will-change:transform,width}.seg button{position:relative;z-index:1;border:0;background:none;color:var(--ink);font:inherit;font-size:.75rem;font-weight:500;padding:7px 12px;border-radius:999px;cursor:pointer;white-space:nowrap}.seg button:focus-visible,.chips button:focus-visible,.pill:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 0}.chips button{border:0;background:var(--fill);padding:6px 10px;border-radius:999px;font:inherit;font-size:.75rem;color:var(--mute);cursor:pointer;transition:background .15s,color .15s}.chips button[aria-pressed=true]{background:var(--ink);color:var(--bg);font-weight:500}.chips button:active{opacity:.75}
.sent{display:flex;flex-wrap:wrap;align-items:baseline;gap:.35rem .65rem;margin:28px 0 0;font-size:clamp(1.35rem,4.5vw,2.05rem);line-height:1.6;letter-spacing:-.025em;font-weight:500;font-variant-numeric:tabular-nums}.sent>span{color:var(--mute);font-weight:400}.sent .t{display:inline-flex;align-items:baseline;gap:.13em}.sent input{font-size:inherit}
input{border:0;border-bottom:1px solid #b8b8be;border-radius:0;background:transparent;color:var(--ink);font:inherit;letter-spacing:inherit;font-variant-numeric:tabular-nums;text-align:center;padding:0 0 2px;outline:none;transition:border-color .15s;width:3.5ch;min-width:0}input.w5{width:5.5ch}input.w2{width:2.2ch}input:focus{border-color:var(--ink);border-bottom-width:2px}input:focus-visible{outline:none}input[type=range]{appearance:none;-webkit-appearance:none;accent-color:var(--ink);display:block;width:100%;height:36px;margin:12px 0 4px;padding:0;border:0;background:transparent;cursor:pointer;touch-action:pan-y}input[type=range]::-webkit-slider-runnable-track{height:7px;border-radius:999px;background:var(--line)}input[type=range]::-moz-range-track{height:7px;border-radius:999px;background:var(--line)}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:24px;height:24px;margin-top:-8.5px;border:2px solid var(--bg);border-radius:50%;background:var(--ink);box-shadow:0 0 0 1px var(--ink)}input[type=range]::-moz-range-thumb{width:20px;height:20px;border:2px solid var(--bg);border-radius:50%;background:var(--ink);box-shadow:0 0 0 1px var(--ink)}input[type=range]:focus-visible{outline:2px solid var(--ink);outline-offset:4px;border-radius:999px}.slide{margin-top:24px}.slide input[type=range]{min-height:40px}
.out{margin:34px 0 0;padding:18px 0 0;border-top:1px solid var(--line)}.out b{display:block;font-size:clamp(2.7rem,10vw,4.6rem);line-height:1.05;letter-spacing:-.06em;font-weight:500;font-variant-numeric:tabular-nums;color:var(--ink);overflow-wrap:anywhere}.out span{display:block;margin-top:7px;font-size:.86rem;color:var(--mute)}.err{color:var(--mute);font-size:.82rem;margin:10px 0 0;min-height:1.4rem}
.lbl{font-size:.78rem;color:var(--mute);font-weight:500;margin:22px 0 0}.lbl+.chips{margin-top:8px}.desc{font-size:.9rem;margin:10px 0 0;color:var(--mute)}.slide{margin-top:24px}.ends{display:flex;justify-content:space-between;gap:8px;font-size:.72rem;color:var(--mute);margin-top:3px}
details{margin-top:24px}summary{cursor:pointer;font-size:.82rem;color:var(--mute);list-style:none;display:inline-block;padding:4px 0}summary::-webkit-details-marker{display:none}summary:after{content:" ↗"}details[open] summary:after{content:" ↘"}.list{columns:2 12rem;column-gap:24px;margin-top:12px;font-variant-numeric:tabular-nums}.list div{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);break-inside:avoid;font-size:.82rem}.list span{color:var(--mute)}
.rows{margin-top:28px;font-variant-numeric:tabular-nums}.rows .r{display:grid;grid-template-columns:3.8rem minmax(35px,1fr) 3.3rem 4rem;gap:8px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line);font-size:.8rem}.rows .h{font-size:.7rem;color:var(--mute);padding-top:0}.rows .r>span,.rows .r>em{color:var(--mute)}.rows .r>b{font-weight:500;text-align:right}.rows .r>em{font-style:normal;text-align:right}.rows .bar{display:block;height:4px;border-radius:3px;background:var(--fill);overflow:hidden}.rows .bar u{display:block;height:100%;border-radius:3px;background:var(--ink);transition:width .25s}
.range{margin-top:24px;font-variant-numeric:tabular-nums}.range div{display:flex;justify-content:space-between;gap:15px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.85rem}.range span{color:var(--mute)}.range b{font-weight:500}.note,.hint{font-size:.78rem;line-height:1.6;color:var(--mute);margin:16px 0 0;max-width:42rem}
.wall{margin-top:28px;padding-top:18px;border-top:1px solid var(--line)}.wall .lbl{margin-top:0}.wall-body{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.pill{border:0;border-radius:999px;background:var(--ink);color:var(--bg);font:inherit;font-size:.78rem;font-weight:500;padding:10px 14px;cursor:pointer}.pill.alt{background:var(--fill);color:var(--ink)}
.tool-footer{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:14px;margin-top:44px;color:var(--mute);font-size:.72rem}.tool-footer a{color:inherit;text-decoration:none}
footer{color:var(--mute);font-size:.75rem;padding:20px 0 0}
@media(min-width:700px){.rows .r{grid-template-columns:5rem minmax(60px,1fr) 4rem 5rem}}
@media(max-width:420px){nav{gap:14px}.tool-page{width:calc(100% - 36px)}.seg button{padding:7px 9px;font-size:.7rem}.sent{gap:.25rem .4rem}.rows .r{grid-template-columns:3.1rem minmax(20px,1fr) 2.8rem 3.4rem;gap:6px;font-size:.73rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}

/* Embedded mode is applied before the stylesheet paints to avoid a style flash. */
html.embedded-tool,html.embedded-tool body{background:transparent!important}
html.embedded-tool body{overflow:hidden}
html.embedded-tool nav,html.embedded-tool .back,html.embedded-tool .tool-page-head,html.embedded-tool .tool-footer{display:none!important}
html.embedded-tool .tool-page{width:100%!important;max-width:none!important;margin:0!important;padding:0 0 16px!important}

/* Wallpaper chooser */
.wall-picker{margin-top:16px;padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--bg)}
.wall-picker-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:10px}
.wall-picker-head .tool-eyebrow{margin:0 0 4px}
.wall-picker-head h2{margin:0;color:var(--ink);font-size:1rem;font-weight:500}
.wall-close{border:0;background:var(--fill);color:var(--ink);border-radius:50%;width:32px;height:32px;font-size:1.3rem;line-height:1;cursor:pointer}
.wall-choice{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:12px;width:100%;padding:10px 0;border:0;border-top:1px solid var(--line);background:transparent;color:var(--ink);text-align:left;font:inherit;cursor:pointer}
.wall-choice b,.wall-choice small{display:block}.wall-choice b{font-size:.82rem;font-weight:500}.wall-choice small{font-size:.72rem;color:var(--mute);margin-top:2px}
.wall-swatch{display:block;width:48px;height:58px;border-radius:7px;border:1px solid #ffffff20}
.swatch-midnight{background:radial-gradient(ellipse at 75% 28%,#587ba0 0,transparent 42%),repeating-radial-gradient(ellipse at 90% 40%,transparent 0 8px,#91b2d533 9px 10px),linear-gradient(145deg,#080f1d,#304c68)}
.swatch-ocean{background:radial-gradient(ellipse at 70% 25%,#4caaa3 0,transparent 45%),linear-gradient(145deg,#061b22,#123e46 55%,#1b6866)}
.swatch-violet{background:radial-gradient(ellipse at 70% 25%,#9c8acb 0,transparent 45%),linear-gradient(145deg,#151126,#33264e 55%,#51456c)}
.swatch-forest{background:radial-gradient(ellipse at 70% 25%,#6da889 0,transparent 45%),linear-gradient(145deg,#071c18,#143d30 55%,#245b45)}
.swatch-ember{background:radial-gradient(ellipse at 72% 25%,#e08a55 0,transparent 45%),linear-gradient(145deg,#24101a,#572b31 55%,#8e4c35)}
.swatch-rose{background:radial-gradient(ellipse at 72% 25%,#c17fa0 0,transparent 45%),linear-gradient(145deg,#201321,#4d2c48 55%,#77485f)}
.wall-arrow{color:var(--mute);font-size:.9rem}.wall-choice:hover b,.wall-choice:focus-visible b{color:var(--acc)}
.wall-choice:focus-visible,.wall-close:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
@media(max-width:420px){.wall-picker{padding:12px}.wall-choice{grid-template-columns:42px minmax(0,1fr) auto;gap:10px}.wall-swatch{width:42px;height:52px}}

/* Distance and running-pace converter */
.converter-divider{height:1px;background:var(--line);margin:26px 0 18px}
.converter-label{font-size:.78rem;color:var(--mute);font-weight:500;margin:0}
.converter-note{font-size:.78rem;line-height:1.5;color:var(--mute);margin:10px 0 0}
.pace-sent{margin-top:8px}


/* Embedded mobile calculators should never widen their parent page */
html,body{max-width:100%;overflow-x:clip}
.tool-page,#convert,#pace,#predict,#strategy{min-width:0;max-width:100%}
.sent,.bar,.chips,.out,.range,.wall,.rows{min-width:0;max-width:100%}
.sent{overflow-wrap:anywhere}
.rows{overflow-x:clip}
@media(max-width:420px){
  .tool-page{width:calc(100% - 24px)}
  .sent{font-size:clamp(1.2rem,6vw,1.65rem);gap:.25rem .35rem}
  .rows .r{grid-template-columns:2.8rem minmax(0,1fr) 2.5rem 3.1rem;gap:5px;font-size:.7rem}
}


/* Dark mode polish: keep calculator controls distinct without harsh contrast. */
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#111113;
  --ink:#ececef;
  --mute:#a0a0a6;
  --line:#303136;
  --fill:#222225;
  --acc:#f2f2f3;
  --seg:#333336;
}
:root[data-theme="dark"] body{background:var(--bg);color:var(--ink)}
:root[data-theme="dark"] .seg{background:#222225}
:root[data-theme="dark"] .seg i{background:#3a3a3d;box-shadow:0 1px 3px #00000035}
:root[data-theme="dark"] .seg button{color:#ececef}
:root[data-theme="dark"] .chips button{background:#222225;color:#bbbbc0}
:root[data-theme="dark"] .chips button[aria-pressed="true"]{background:#f2f2f3;color:#111113}
:root[data-theme="dark"] input{border-bottom-color:#555558}
:root[data-theme="dark"] input:focus{border-color:var(--acc)}
:root[data-theme="dark"] input[type="range"]{accent-color:var(--acc)}
:root[data-theme="dark"] input[type="range"]::-webkit-slider-runnable-track{background:#333336}
:root[data-theme="dark"] input[type="range"]::-moz-range-track{background:#333336}
:root[data-theme="dark"] input[type="range"]::-webkit-slider-thumb{border-color:#111113;background:var(--acc);box-shadow:0 0 0 1px var(--acc)}
:root[data-theme="dark"] input[type="range"]::-moz-range-thumb{border-color:#111113;background:var(--acc);box-shadow:0 0 0 1px var(--acc)}
:root[data-theme="dark"] input[type="range"]:focus-visible,
:root[data-theme="dark"] .seg button:focus-visible,
:root[data-theme="dark"] .chips button:focus-visible,
:root[data-theme="dark"] .pill:focus-visible{outline-color:var(--acc)}
:root[data-theme="dark"] .rows .bar{background:#252528}
:root[data-theme="dark"] .rows .bar u{background:var(--acc)}
:root[data-theme="dark"] .pill{background:var(--acc);color:#111113}
:root[data-theme="dark"] .pill.alt{background:#222225;color:var(--ink)}
:root[data-theme="dark"] .wall-picker{background:#15191f}
:root[data-theme="dark"] .wall-close{background:#252528;color:var(--ink)}
:root[data-theme="dark"] .wall-swatch{border-color:#ffffff30}


/* Keep interactive controls neutral in dark mode; reserve slate blue for accents. */
:root[data-theme="dark"] input[type="range"]{accent-color:#e7e7e9}
:root[data-theme="dark"] input[type="range"]::-webkit-slider-thumb{background:#e7e7e9;box-shadow:0 0 0 1px #e7e7e9}
:root[data-theme="dark"] input[type="range"]::-moz-range-thumb{background:#e7e7e9;box-shadow:0 0 0 1px #e7e7e9}
:root[data-theme="dark"] .pill{background:#e7e7e9;color:#17181b}
:root[data-theme="dark"] .chips button[aria-pressed="true"]{background:#e7e7e9;color:#17181b}


/* ---- Launch additions: share actions, new tool layouts, explainers, print, a11y ---- */
.tool-page,#hr,#tp,#tmill,#fuel{min-width:0;max-width:100%}
.zones,.paces,.sched,.share{min-width:0;max-width:100%}
input{border-bottom-color:#85858d}
input::placeholder{color:var(--mute);opacity:.55}
:root[data-theme="dark"] input{border-bottom-color:#77777c}
summary:focus-visible,a:focus-visible,.tool-footer a:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:3px}
:root[data-theme="dark"] summary:focus-visible,:root[data-theme="dark"] a:focus-visible{outline-color:var(--acc)}

/* Copy result / copy link */
.share{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:14px}
.share .pill{font-size:.75rem;padding:8px 13px}
.share-msg{font-size:.75rem;color:var(--mute)}

/* Heart-rate zones */
.zones{margin-top:24px;font-variant-numeric:tabular-nums}
.zr{display:grid;grid-template-columns:2rem minmax(0,1fr) auto;gap:10px;align-items:center;padding:11px 0 11px 10px;border-bottom:1px solid var(--line);border-left:3px solid var(--zc,var(--line))}
.zr b{font-weight:500;font-size:.78rem;color:var(--mute)}
.zr>span{font-size:.88rem;min-width:0}
.zr small{display:block;font-size:.72rem;line-height:1.4;color:var(--mute);margin-top:2px;font-weight:400}
.zr em{font-style:normal;font-weight:500;font-size:.9rem;text-align:right;white-space:nowrap}
.z1{--zc:#8fb0d8}.z2{--zc:#6bae98}.z3{--zc:#cfae55}.z4{--zc:#d88a58}.z5{--zc:#c45f58}

/* Training pace chart */
.paces{margin-top:24px;font-variant-numeric:tabular-nums}
.pr{display:grid;grid-template-columns:minmax(0,1.7fr) repeat(3,minmax(0,1fr));gap:8px;align-items:baseline;padding:10px 0;border-bottom:1px solid var(--line);font-size:.82rem}
.pr.h{font-size:.7rem;color:var(--mute);padding-top:0}
.pr>b{font-weight:500;text-align:right}.pr.h>b{font-weight:400}
.pr>span small{display:block;font-size:.7rem;line-height:1.35;color:var(--mute);margin-top:2px}

/* Fuel plan */
.sched{margin-top:24px;font-variant-numeric:tabular-nums}
.sr{display:grid;grid-template-columns:3.4rem repeat(3,minmax(0,1fr));gap:8px;align-items:baseline;padding:9px 0;border-bottom:1px solid var(--line);font-size:.82rem}
.sr.h{font-size:.7rem;color:var(--mute);padding-top:0}
.sr>span{color:var(--mute)}.sr>b{font-weight:500;text-align:right}.sr.h>b{font-weight:400}
#tmeq{margin-top:20px}#tmeq b{font-weight:500;text-align:right}
.hint:empty{display:none}

/* Explainers under each tool (hidden when a tool is embedded on the home page) */
.explain{margin-top:56px;padding-top:28px;border-top:1px solid var(--line);max-width:42rem}
.explain h2{font-size:1.05rem;font-weight:600;letter-spacing:-.01em;color:var(--ink);margin:30px 0 10px}
.explain h2:first-child{margin-top:0}
.explain p,.explain li{font-size:.9rem;line-height:1.65;color:var(--ink)}
.explain p{margin:0 0 12px}
.explain ul{padding-left:1.15rem;margin:0 0 12px}.explain li{margin-bottom:6px}
.explain a{color:var(--ink)}
.explain .formula{font:500 .82rem/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--fill);padding:10px 12px;border-radius:8px;overflow-x:auto;margin:10px 0 14px}
.explain .tablewrap{overflow-x:auto;margin:8px 0 14px}
.explain table{width:100%;border-collapse:collapse;font-size:.8rem;font-variant-numeric:tabular-nums}
.explain th,.explain td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.explain th:first-child,.explain td:first-child{text-align:left}
.explain th{font-size:.72rem;font-weight:500;color:var(--mute)}
.explain .src{font-size:.78rem;color:var(--mute)}
html.embedded-tool .explain,html.embedded-tool .tool-footer{display:none!important}
noscript .nojs{margin:24px 0;color:var(--mute);font-size:.9rem}

@media(max-width:420px){
  .pr{grid-template-columns:minmax(0,1.35fr) repeat(3,minmax(0,1fr));gap:5px;font-size:.72rem}
  .sr{grid-template-columns:3rem repeat(3,minmax(0,1fr));gap:5px;font-size:.74rem}
  .zr{grid-template-columns:1.8rem minmax(0,1fr) auto;gap:8px}
}

/* Print: the split plan becomes a clean, wrist-friendly sheet */
.print-head{display:none}
@media print{
  :root{--bg:#fff;--ink:#000;--mute:#444;--line:#bbb;--fill:#fff}
  body{background:#fff;color:#000}
  nav,.back,.tool-footer,.explain,.share{display:none!important}
  #strategy .bar,#strategy .chips,#strategy .sent,#strategy .slide,#strategy .out,#strategy .err,#strategy .wall,#strategy .lbl,#strategy .note{display:none!important}
  .tool-page-head{margin-bottom:8pt}
  .print-head{display:block;font-size:11pt;font-weight:600;margin:0 0 10pt}
  #strategy .rows{margin-top:0;columns:2;column-gap:28pt}
  #strategy .rows .r{break-inside:avoid;font-size:10pt;padding:5pt 0}
  #strategy .rows .h{display:none}
  #strategy .rows .bar{display:none}
  #strategy .rows .r{grid-template-columns:3.6rem 3.2rem 4rem}
}
.footer-links{display:inline-flex;flex-wrap:wrap;gap:6px 14px}