:root{
  --paper:#F5F3F8;--surface:#FFFFFF;--ink:#241A33;--muted:#62586F;--line:#DCD4E6;
  --fertile:#2C8C74;--ov:#E1A31F;--period:#B8506E;
  --serif:"Young Serif",Georgia,"Noto Serif",serif;
  --sans:"Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI","Noto Sans","Noto Sans Arabic","Noto Nastaliq Urdu","Noto Sans Devanagari","Noto Sans Bengali","Noto Sans Thai","Hiragino Sans","Yu Gothic","Malgun Gothic","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:1.0625rem/1.65 var(--sans)}
img,svg{max-width:100%}
a{color:var(--ink);text-decoration-color:var(--fertile);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:var(--fertile)}
:focus-visible{outline:3px solid var(--ov);outline-offset:2px;border-radius:4px}
.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.skip:focus{width:auto;height:auto;clip:auto;inset-inline-start:12px;top:12px;background:var(--surface);padding:8px 12px;z-index:10}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.18;letter-spacing:-.01em;text-wrap:balance}
[lang=ar] h1,[lang=ar] h2,[lang=ar] h3,[lang=ur] h1,[lang=ur] h2,[lang=ur] h3,[lang=hi] h1,[lang=hi] h2,[lang=bn] h1,[lang=bn] h2,[lang=th] h1,[lang=th] h2,[lang=ja] h1,[lang=ja] h2,[lang=ko] h1,[lang=ko] h2,[lang=zh] h1,[lang=zh] h2,[lang=ru] h1,[lang=ru] h2{font-family:var(--sans);font-weight:700;letter-spacing:0}
[lang=ur] body,[lang=ur]{line-height:2}
h1{font-size:clamp(2rem,4.6vw,3.2rem);margin:.25em 0 .35em}
h2{font-size:1.6rem;margin:1.9em 0 .5em}
h3{font-size:1.2rem;margin:1.4em 0 .4em}
.lede{font-size:1.2rem;color:var(--muted);max-width:58ch;margin-top:0}

/* header */
.site-head{border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:16px 24px;min-height:68px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:1.15rem;text-decoration:none;color:var(--ink)}
.brand svg{width:30px;height:30px;flex:none}
.site-nav{display:flex;gap:6px 20px;margin-inline-start:auto;align-items:center;flex-wrap:wrap}
.site-nav a{text-decoration:none;color:var(--muted)}
.site-nav a:hover{color:var(--ink)}
.lang-pick{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.95rem}
select,input{font:inherit;color:var(--ink)}
.lang-pick select{padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}

/* hero */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:56px 0 24px}
.hero h1{font-size:clamp(2.3rem,5.4vw,3.9rem)}
.dial{width:100%;max-width:360px;justify-self:center}
.dial .seg{opacity:0;animation:segIn .5s ease forwards}
@keyframes segIn{to{opacity:1}}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{display:inline-block;padding:12px 22px;border-radius:999px;background:var(--ink);color:#fff;text-decoration:none;font-weight:700}
.btn:hover{color:#fff;background:#3a2b52}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--surface);color:var(--ink)}
.key{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:.95rem;margin-top:28px}
.key i,.legend i{display:inline-block;width:12px;height:12px;border-radius:50%;margin-inline-end:6px;vertical-align:-1px}
i.p{background:var(--period)}i.f{background:var(--fertile)}i.o{background:var(--ov)}

/* tool lists */
.tools{columns:2;column-gap:48px;list-style:none;padding:0;margin:0}
.tools li{break-inside:avoid;padding:16px 0;border-top:1px solid var(--line)}
.tools a{font-family:var(--serif);font-size:1.2rem;text-decoration:none}
[lang=ar] .tools a,[lang=ur] .tools a,[lang=hi] .tools a,[lang=bn] .tools a,[lang=th] .tools a,[lang=ja] .tools a,[lang=ko] .tools a,[lang=zh] .tools a,[lang=ru] .tools a{font-family:var(--sans);font-weight:700}
.tools p{margin:4px 0 0;color:var(--muted);font-size:.97rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:12px 0 0}
.chips a{display:inline-flex;align-items:center;justify-content:center;min-width:52px;padding:8px 14px;border:1.5px solid var(--line);border-radius:999px;text-decoration:none;background:var(--surface);font-weight:700}
.chips a:hover{border-color:var(--fertile)}
.chips a[aria-current]{background:var(--ink);color:#fff;border-color:var(--ink)}

/* calculator */
.crumbs{font-size:.92rem;color:var(--muted);padding-top:22px}
.crumbs a{color:var(--muted)}
.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;margin:28px 0 8px;align-items:start}
.calc{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;margin-bottom:6px}
.field input,.field select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff}
.field input:focus,.field select:focus{border-color:var(--fertile);outline:none;box-shadow:0 0 0 3px rgba(44,140,116,.2)}
.go{width:100%;font:inherit;font-weight:700;padding:14px;border:0;border-radius:999px;background:var(--ink);color:#fff;cursor:pointer;margin-top:4px}
.go:hover{background:#3a2b52}
.result{border-radius:20px;padding:26px;background:var(--ink);color:#fff;outline:none}
.result.is-empty{background:transparent;border:1.5px dashed var(--line);color:var(--muted);min-height:180px;display:flex;align-items:center}
.result.is-empty p{margin:0}
.result.is-error{background:#fff;border:1.5px solid var(--period);color:var(--ink)}
.result dl{margin:0}
.r{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.14)}
.r:last-child{border-bottom:0}
.r dt{font-size:.9rem;color:rgba(255,255,255,.72)}
.r dd{margin:2px 0 0;font-size:1.22rem;font-weight:700}
.r.hl dd{color:var(--ov);font-size:1.45rem}
.cyc{padding-top:6px}.cyc+.cyc{border-top:1px solid rgba(255,255,255,.3);margin-top:6px}
.cyc-n{display:block;font-size:.85rem;color:rgba(255,255,255,.6);margin-top:8px}
.strip{display:grid;grid-template-columns:repeat(auto-fill,minmax(26px,1fr));gap:4px;margin:18px 0 8px}
.strip span{aspect-ratio:1;border-radius:50%;display:grid;place-items:center;font-size:.7rem;background:rgba(255,255,255,.09)}
.strip .p{background:var(--period)}.strip .f{background:var(--fertile)}.strip .o{background:var(--ov);color:var(--ink);font-weight:700}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.85rem;color:rgba(255,255,255,.8);margin:0}

/* prose */
.prose{max-width:70ch}
.prose ul{padding-inline-start:1.2em}
.prose li{margin:.3em 0}
details{border-top:1px solid var(--line);padding:14px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:700}
details p{margin:.6em 0 0;color:var(--muted)}
.disc{font-size:.93rem;color:var(--muted);border-inline-start:3px solid var(--period);padding-inline-start:14px;margin-top:28px}
.tbl{overflow-x:auto;margin:20px 0;background:var(--surface);border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%}
th,td{text-align:start;padding:11px 16px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child th,tr:last-child td{border-bottom:0}
th{font-weight:400;color:var(--muted);width:52%}
td{font-weight:700}

/* blog */
.post-list{list-style:none;padding:0;margin:0}
.post-list li{padding:14px 0;border-top:1px solid var(--line)}
.post-list a{font-family:var(--serif);font-size:1.15rem;text-decoration:none}
.post-list p{margin:4px 0 0;color:var(--muted);font-size:.95rem}
.cat-nav{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:8px 0 24px}
.cat-nav a{display:inline-block;padding:6px 14px;border:1.5px solid var(--line);border-radius:999px;text-decoration:none;background:var(--surface);font-size:.95rem}
.cat-nav a[aria-current]{background:var(--ink);color:#fff;border-color:var(--ink)}
.pager{display:flex;flex-wrap:wrap;gap:6px;margin:28px 0}
.pager a,.pager span{display:inline-grid;place-items:center;min-width:40px;height:40px;padding:0 10px;border:1px solid var(--line);border-radius:10px;text-decoration:none;background:var(--surface)}
.pager span{background:var(--ink);color:#fff;border-color:var(--ink)}
.meta{color:var(--muted);font-size:.93rem}
.cta{background:var(--surface);border:1px solid var(--line);border-inline-start:4px solid var(--fertile);border-radius:14px;padding:18px 22px;margin:32px 0}
.cta p{margin:0 0 10px}
.prevnext{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:36px 0 0;padding-top:18px;border-top:1px solid var(--line)}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px}
.side h2{font-size:1.2rem;margin-top:2em}
.side ul{list-style:none;padding:0;margin:0}.side li{padding:8px 0;border-top:1px solid var(--line);font-size:.95rem}

/* footer */
.site-foot{margin-top:80px;border-top:1px solid var(--line);padding:36px 0 48px;color:var(--muted);font-size:.93rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.site-foot ul{list-style:none;padding:0;margin:0}.site-foot li{margin:6px 0}
.site-foot a{color:var(--muted)}
.site-foot h2{font-size:1rem;font-family:var(--sans);font-weight:700;margin:0 0 8px;color:var(--ink)}
.langs-foot{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:20px}

@media (max-width:820px){
  .hero,.calc-layout,.two-col,.foot-grid{grid-template-columns:1fr}
  .hero{padding-top:32px;gap:24px}
  .dial{max-width:240px;order:-1}
  .tools{columns:1}
  .site-nav{margin-inline-start:0;width:100%}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.dial .seg{opacity:1}}
@media print{.site-head,.site-foot,.calc,.lang-pick{display:none}.result{color:#000;background:#fff;border:1px solid #000}.r dt{color:#333}}