/* WhiteUI v4 — "advanced" redesign, inspired by the example the user shared.
   Two-column tool layout: inputs panel (left) + result panel (right).
   Display type: Bricolage Grotesque; body: Instrument Sans (system fallbacks).
   Brand purple kept: #673DE6. Dark mode follows the system, like the example. */
:root{
  --bg:#FFFFFF; --ink:#1B1F2A; --body:#2E2A3F; --muted:#5D6577;
  --mist:#F2F4F8; --line:#E3E7EE; --primary:#673DE6; --primary-dark:#5A2EDB;
  --primary-soft:#F1EEFF; --tint:#E9E8FF; --result:#059669;
  --hd:"Bricolage Grotesque","Trebuchet MS",system-ui,sans-serif;
  --bd:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#13151C; --ink:#ECEEF5; --body:#C9CEDD; --muted:#98A0B3;
    --mist:#1C1F29; --line:#2B3040; --primary:#8B85FF; --primary-dark:#7C5CFF;
    --primary-soft:#262452; --tint:#262452; --result:#4FD1A0}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--bd);-webkit-font-smoothing:antialiased}
a{color:var(--primary)}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:6px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--line);z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.top{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font:800 22px/1 var(--hd);letter-spacing:-.02em;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo span{color:var(--primary)}
.logo img{width:30px;height:30px}
.topnote{font-size:13px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
nav.pillnav{display:flex;gap:4px;background:var(--mist);padding:4px;border-radius:999px}
nav.pillnav a{padding:7px 18px;border-radius:999px;text-decoration:none;font-weight:600;font-size:15px;color:var(--muted)}
nav.pillnav a[aria-current="page"]{background:var(--bg);color:var(--ink);box-shadow:0 1px 3px rgba(20,24,40,.14)}
h1,h2,h3{font-family:var(--hd);letter-spacing:-.025em;line-height:1.1;margin:0}
h1{font-size:clamp(32px,6vw,52px);font-weight:800;margin:36px 0 0}
h2{font-size:26px;margin:36px 0 12px}
h3{font-size:18px;margin:24px 0 6px}
.lead,.lede{color:var(--muted);max-width:52ch;margin:12px 0 0;font-size:18px}
.muted{color:var(--muted);font-size:14px}
.crumb{font-size:13px;color:var(--muted);margin-top:22px}
.crumb a{text-decoration:none}

/* --- Home: search + index --- */
.searchbox{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--mist);border-radius:14px;padding:0 14px;margin-top:26px;max-width:460px}
.searchbox input{flex:1;border:0;background:transparent;color:var(--ink);font:400 16px var(--bd);padding:13px 0}
.searchbox input:focus{outline:none}
.searchbox:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.toolindex{margin:30px 0 0;padding:0;list-style:none}
.toolindex li{border-top:1px solid var(--line)}
.toolindex li:last-child{border-bottom:1px solid var(--line)}
.toolindex a{display:flex;gap:16px;align-items:baseline;text-decoration:none;padding:20px 4px;color:inherit}
.toolindex a:hover .tname{color:var(--primary)}
.toolindex .tname{font-family:var(--hd);font-size:26px;color:var(--ink)}
.toolindex .tdesc{color:var(--muted);font-size:15px}
.toolindex .tarrow{margin-left:auto;color:var(--primary);font-size:22px;flex:none}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0 0}
.chip{border:1px solid var(--line);background:var(--bg);color:var(--ink);font:500 14px var(--bd);padding:7px 15px;border-radius:999px;cursor:pointer;text-decoration:none}
.chip:hover{border-color:var(--primary)}
.chip.cur{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.rule{border:0;border-top:1px solid var(--line);margin:36px 0}

/* --- Tool: two-column calculator --- */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
.panel{background:var(--mist);border-radius:22px;padding:26px}
.panel.res{background:var(--bg);border:1px solid var(--line)}
.field{margin-bottom:26px}.field:last-child{margin-bottom:0}
.row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
.row label{font-weight:600}
.num{display:flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:0 12px;min-width:150px}
.num span{color:var(--muted);font-size:14px}
.num input{width:100%;border:0;background:transparent;color:var(--ink);font:600 17px var(--bd);padding:9px 6px;text-align:right;min-width:0}
.num input:focus{outline:none}
.num:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
input[type=range]{width:100%;accent-color:var(--primary);height:28px;margin:0}
.seg{display:inline-flex;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:3px;gap:0;flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--muted);font:600 13px var(--bd);padding:5px 12px;border-radius:8px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--primary);color:#fff}
.answer .alabel,.sub{color:var(--muted);margin:0;font-size:15px}
.big{font:800 clamp(44px,8vw,64px)/1 var(--hd);letter-spacing:-.04em;margin:6px 0 4px;color:var(--ink)}
.answer .big{color:var(--ink)}
.asub{font-size:17px;margin:12px 0 0;color:var(--body)}
.abreak{font-size:15px;margin:8px 0 0;color:var(--muted)}
.answer-actions{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}
.abtn{background:var(--ink);color:var(--bg);border:0;border-radius:12px;padding:11px 20px;font-size:15px;font-weight:600;cursor:pointer}
.abtn:hover{filter:brightness(1.15)}
.split{display:flex;height:16px;border-radius:99px;overflow:hidden;margin:26px 0 14px;background:var(--mist)}
.split b{display:block;transition:width .35s ease}
.split .p{background:var(--primary)}
.split .i{background:var(--result)}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.legend small{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:14px}
.legend small::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--primary)}
.legend div:nth-child(2) small::before{background:var(--result)}
.legend strong{font:700 22px var(--hd);letter-spacing:-.02em}
.tot{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;display:flex;justify-content:space-between;font-weight:600}
.chips2{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 4px}
.chip2{background:var(--mist);border:1px solid var(--line);border-radius:14px;padding:10px 14px;flex:1 1 140px}
.chip2 b{display:block;font-family:var(--hd);font-size:20px;color:var(--ink);line-height:1.2}
.chip2 span{font-size:12px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase;font-weight:700}
/* legacy sentence inputs (blog + old pages) */
.sentence{font-family:var(--hd);font-size:24px;line-height:1.7;color:var(--ink);margin:28px 0 8px}
.sentence input[type=number],.sentence select{font:inherit;color:var(--primary);background:transparent;border:0;border-bottom:3px solid var(--primary);width:4.2ch;text-align:center;padding:0 2px;outline:none;border-radius:0}
.sentence select{width:auto;cursor:pointer}
.sentence label{font-family:var(--bd);font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.04em;text-transform:uppercase;display:block;margin-top:14px}
input[type=text],input[type=number],select,textarea{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:16px;font-family:var(--bd);background:var(--bg);color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:3px solid var(--primary-soft);border-color:var(--primary)}
.btn{display:inline-block;background:var(--primary);color:#fff;text-decoration:none;padding:11px 20px;border-radius:12px;font-weight:600}
.btn:hover{filter:brightness(1.08)}
.visual{background:var(--bg);border:1px solid var(--line);border-radius:20px;padding:20px;margin:20px 0}
.visual svg{width:100%;height:auto;display:block}
.visual figcaption{font-size:13px;color:var(--muted);margin-top:10px}
.ad{border:1px dashed var(--line);border-radius:16px;padding:16px;text-align:center;color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin:24px 0;background:var(--bg)}
.example{background:var(--mist);border:1px solid var(--line);border-radius:16px;padding:18px}
table{width:100%;border-collapse:collapse}
td,th{padding:9px 6px;border-bottom:1px solid var(--line);text-align:left;font-size:15px}
footer{margin-top:48px;padding:24px 0 32px;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
.sticky-answer{display:none}
@media(max-width:760px){
  .calc{grid-template-columns:1fr}
  .panel{padding:20px}
  .toolindex .tdesc{display:none}
  .sticky-answer{display:flex;justify-content:space-between;align-items:center;gap:12px;position:sticky;bottom:12px;background:var(--ink);color:#fff;border-radius:999px;padding:12px 18px;margin:20px 0;font-weight:700;box-shadow:0 8px 24px rgba(17,9,42,.25)}
  .sticky-answer .sbig{font-family:var(--hd);font-size:22px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* --- v4.1 fix: number-box inputs must stay borderless inside .num ---
   A later global input rule was giving them their own border/padding,
   which showed as a second box inside the outer box (seen in screenshot). */
.panel .num input, .field .num input{
  border:0 !important; background:transparent !important; box-shadow:none !important;
  border-radius:0 !important; padding:9px 6px !important; width:100% !important;
}
.panel .num input:focus, .field .num input:focus{outline:none !important; border:0 !important; box-shadow:none !important}
/* v4.2 slider fix: input stays 28px tall so the thumb is centred on the
   track, instead of a 6px-tall input that clipped the thumb off-track. */
input[type=range]{-webkit-appearance:none;appearance:none;height:28px;background:transparent;margin:0;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:6px;background:var(--line);border-radius:999px}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:22px;height:22px;border-radius:50%;background:var(--primary);border:3px solid var(--bg);box-shadow:0 1px 4px rgba(20,24,40,.3);cursor:pointer;margin-top:-8px}
input[type=range]::-moz-range-track{height:6px;background:var(--line);border-radius:999px}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--primary);border:3px solid var(--bg);box-shadow:0 1px 4px rgba(20,24,40,.3);cursor:pointer}