/* Shared calculator-site stylesheet. Per-site colours come from :root vars injected by the build. */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:var(--accent-d);text-underline-offset:3px}
a:hover{color:var(--accent)}
h1,h2,h3{font-family:var(--font-h);line-height:1.2;letter-spacing:-.015em;margin:0 0 .5em;color:var(--ink)}
h1{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:750}
h2{font-size:clamp(1.35rem,2.6vw,1.75rem);font-weight:700;margin-top:2.2em}
h3{font-size:1.1rem;font-weight:650;margin-top:1.6em}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em;margin:0 0 1em}
li{margin-bottom:.35em}
.wrap{width:100%;max-width:1120px;margin-inline:auto;padding-inline:20px}
.wrap--narrow{max-width:760px}
.skip{position:absolute;left:12px;top:-60px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{top:12px}

/* header */
.hdr{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.hdr__in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font:750 1.25rem var(--font-h);color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.logo__mark{width:34px;height:34px;border-radius:10px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-size:1.05rem}
.nav{display:flex;gap:4px;align-items:center}
.nav a{padding:8px 12px;border-radius:8px;color:var(--ink-soft);text-decoration:none;font-weight:550;font-size:.95rem}
.nav a:hover,.nav a[aria-current]{background:var(--tint);color:var(--ink)}
.nav-toggle{display:none;border:1px solid var(--line);background:var(--surface);border-radius:10px;width:42px;height:42px;cursor:pointer;color:var(--ink)}
@media(max-width:820px){
  .nav-toggle{display:grid;place-items:center}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px}
  .nav-open .nav{display:flex}
}

/* hero (home) */
.hero{background:linear-gradient(180deg,var(--tint),var(--bg));padding:clamp(40px,7vw,84px) 0 clamp(28px,5vw,56px)}
.hero p{font-size:1.15rem;color:var(--ink-soft);max-width:60ch}
.search{position:relative;max-width:560px;margin-top:22px}
.search input{width:100%;height:54px;border-radius:14px;border:1px solid var(--line-d);background:var(--surface);padding:0 18px;font:inherit;font-size:1.05rem;box-shadow:var(--shadow)}
.search input:focus{outline:2px solid var(--accent);outline-offset:2px}

/* grids / cards */
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s,box-shadow .15s}
a.card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow);color:var(--ink)}
.card b{display:block;font:650 1.02rem var(--font-h);margin-bottom:4px}
.card span{color:var(--ink-soft);font-size:.92rem;line-height:1.45;display:block}
.sec{padding:clamp(28px,5vw,52px) 0}
.sec h2{margin-top:0}
.cat-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}
.cat-head a{font-weight:600;font-size:.95rem}

/* breadcrumb */
.crumbs{font-size:.88rem;color:var(--ink-soft);padding-block:18px 4px}
.crumbs a{color:var(--ink-soft)}
.crumbs span[aria-current]{color:var(--ink)}

/* calculator */
.calc{display:grid;gap:18px;margin:22px 0 8px;align-items:start}
@media(min-width:900px){.calc{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:calc(var(--r) + 4px);padding:clamp(18px,3vw,28px);box-shadow:var(--shadow)}
.panel h2{font-size:1rem;margin:0 0 16px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);font-weight:700}
.fld{margin-bottom:16px}
.fld label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.fld .hint{display:block;color:var(--ink-soft);font-size:.82rem;margin-top:5px}
.inp{display:flex;align-items:stretch;border:1px solid var(--line-d);border-radius:12px;background:#fff;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.inp:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--ring)}
.inp input,.inp select{flex:1;min-width:0;border:0;background:transparent;padding:12px 14px;font:inherit;font-size:1.02rem;color:var(--ink);outline:0}
.inp select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23667' stroke-width='2'%3E%3Cpath d='m1 1 5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.inp .u{display:grid;place-items:center;padding:0 14px;background:var(--tint);color:var(--ink-soft);font-size:.9rem;font-weight:600;white-space:nowrap}
.inp .u--pre{border-right:1px solid var(--line)}
.inp .u--post{border-left:1px solid var(--line)}
.row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
.fld,.inp{min-width:0}
.inp input{width:100%}
@media(max-width:480px){.row2{grid-template-columns:1fr}}
.chk{display:flex;gap:10px;align-items:center;font-weight:550}
.chk input{width:18px;height:18px;accent-color:var(--accent)}
.actions{display:flex;gap:10px;margin-top:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 22px;border-radius:12px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:650 .98rem var(--font);cursor:pointer;text-decoration:none}
.btn:hover{filter:brightness(1.07);color:var(--accent-ink)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-d)}
.btn--ghost:hover{background:var(--tint);color:var(--ink)}

.res-panel{background:linear-gradient(160deg,var(--accent-d),var(--accent));color:#fff;border-color:transparent}
.res-panel h2{color:rgba(255,255,255,.75)}
.res{display:flex;flex-direction:column;gap:2px;margin-bottom:14px}
.res__l{font-size:.9rem;color:rgba(255,255,255,.8);font-weight:550}
.res__v{font:750 clamp(2rem,5vw,2.9rem)/1.1 var(--font-h);letter-spacing:-.02em;word-break:break-word}
.res--main+.res--main .res__v{font-size:clamp(1.5rem,3.4vw,2rem)}
.res-list{margin:12px 0 0;border-top:1px solid rgba(255,255,255,.25)}
.res-list div{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.18)}
.res-list dt{color:rgba(255,255,255,.82)}
.res-list dd{margin:0;font-weight:700;text-align:right}
.res-note{font-size:.88rem;color:rgba(255,255,255,.85);margin:14px 0 0}
.res-empty{color:rgba(255,255,255,.85);margin:0}
.tbl-wrap{overflow-x:auto;margin-top:16px;background:var(--surface);border-radius:12px;color:var(--ink);max-height:360px;overflow-y:auto}
.tbl{width:100%;border-collapse:collapse;font-size:.88rem}
.tbl th,.tbl td{padding:9px 12px;text-align:right;border-bottom:1px solid var(--line)}
.tbl th{position:sticky;top:0;background:var(--tint);font-weight:700}
.tbl th:first-child,.tbl td:first-child{text-align:left}

/* ads */
.ad{margin:26px 0;text-align:center;min-height:90px}
.ad ins{display:block}
.ad--ph{display:none}
.ad-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-soft);margin-bottom:4px}

/* content */
.content{padding-bottom:20px}
.content table{border-collapse:collapse;width:100%;margin:0 0 1.2em;font-size:.95rem}
.content th,.content td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.content th{background:var(--tint)}
.formula{background:var(--tint);border-left:4px solid var(--accent);padding:14px 18px;border-radius:0 12px 12px 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.95rem;margin:0 0 1.2em;overflow-x:auto}
.faq details{border-top:1px solid var(--line);padding:16px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent-d);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:12px 0 0;color:var(--ink-soft)}
.related{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.disc{font-size:.85rem;color:var(--ink-soft);border-top:1px solid var(--line);margin-top:2.4em;padding-top:1em}

/* footer */
.ftr{background:var(--footer);color:#c9d1dc;margin-top:64px;padding:44px 0 28px;font-size:.93rem}
.ftr a{color:#e6ebf2}
.ftr__grid{display:grid;gap:28px;grid-template-columns:1.4fr 1fr 1fr}
@media(max-width:700px){.ftr__grid{grid-template-columns:1fr}}
.ftr h3{color:#fff;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;margin:0 0 12px}
.ftr ul{list-style:none;padding:0;margin:0}
.ftr li{margin-bottom:7px}
.ftr__bot{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:18px;font-size:.84rem;color:#98a3b3}

.legal h1{margin-top:28px}
@media print{.hdr,.ftr,.ad,.actions{display:none}}

.ad-box{display:grid;place-items:center;gap:4px;min-height:96px;border:2px dashed var(--line-d);border-radius:12px;background:repeating-linear-gradient(45deg,transparent 0 12px,rgba(0,0,0,.025) 12px 24px);color:var(--ink-soft);padding:14px}
.ad-box b{font-size:.95rem;color:var(--ink)}
.ad-box span{font-size:.8rem}

.quick{margin:18px 0 6px;max-width:68ch;background:var(--tint);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:14px 18px}
.quick b{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-d);margin-bottom:4px}
.quick p{margin:0;font-size:1.02rem;color:var(--ink)}
.disc time{font-weight:600}

.sources{padding-left:1.1em}.sources a{font-weight:600}
.byline{color:var(--ink-soft);font-size:.92rem;margin:-4px 0 8px}.byline strong{color:var(--ink)}
.article h2{margin-top:1.6em}