/* Well Water Clarity — free tools stylesheet
   Mobile-first, no external dependencies. */
:root{
  --ink:#10283a;
  --ink-2:#3d5566;
  --muted:#5b7080;
  --bg:#f5f8fa;
  --card:#ffffff;
  --line:#d8e3ea;
  --line-2:#c3d3dd;
  --brand:#0a6788;
  --brand-dk:#084f69;
  --brand-lt:#e6f2f7;
  --focus:#f2a900;
  --red:#b42318;   --red-bg:#fdecea;
  --orange:#a14a07;--orange-bg:#fff1e3;
  --amber:#7a5a00; --amber-bg:#fff8db;
  --green:#1d6b3a; --green-bg:#e8f5ec;
  --grey:#4c5a64;  --grey-bg:#eef2f4;
  --radius:12px;
  --shadow:0 1px 2px rgba(16,40,58,.06),0 4px 16px rgba(16,40,58,.06);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::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/1.6 var(--font)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-underline-offset:2px}
a:hover{color:var(--brand-dk)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.narrow{max-width:760px}

/* ---------- header ---------- */
.topstrip{background:var(--ink);color:#dbe8ef;font-size:.78rem;letter-spacing:.02em}
.topstrip .wrap{display:flex;gap:14px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.topstrip span+span::before{content:"•";margin-right:14px;opacity:.6}
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.logo img{height:40px;width:auto}
.menu-btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);background:#fff;color:var(--ink);border-radius:8px;padding:8px 12px;font:600 .95rem var(--font);cursor:pointer;min-height:44px}
.menu-btn svg{width:18px;height:18px}
.site-nav{display:none;border-top:1px solid var(--line);background:#fff}
.site-nav.open{display:block}
.site-nav ul{list-style:none;margin:0;padding:8px 16px 14px}
.site-nav a{display:block;padding:11px 4px;color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1px solid var(--line)}
.site-nav a[aria-current="page"]{color:var(--brand)}
@media(min-width:980px){
  .menu-btn{display:none}
  .site-nav{display:block!important;border:0;background:none}
  .site-nav ul{display:flex;gap:2px;padding:0}
  .site-nav a{border:0;padding:8px 9px;font-size:.9rem;border-radius:6px}
  .site-nav a:hover{background:var(--brand-lt)}
  .site-head .wrap{flex-wrap:nowrap}
}
.crumbs{font-size:.85rem;color:var(--muted);padding:14px 0 0}
.crumbs a{color:var(--muted)}

/* ---------- hero ---------- */
.hero{padding:10px 0 8px}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:var(--brand-lt);padding:4px 10px;border-radius:99px}
h1{font-size:clamp(1.65rem,5.4vw,2.5rem);line-height:1.15;margin:12px 0 10px;letter-spacing:-.01em}
h2{font-size:clamp(1.3rem,3.8vw,1.7rem);line-height:1.25;margin:2.2em 0 .6em}
h3{font-size:1.1rem;line-height:1.3;margin:1.6em 0 .4em}
.lede{font-size:1.08rem;color:var(--ink-2);margin:0 0 12px}
.byline{font-size:.85rem;color:var(--muted);margin:0 0 6px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;padding:0;list-style:none}
.chips li{font-size:.82rem;background:#fff;border:1px solid var(--line);border-radius:99px;padding:4px 10px;color:var(--ink-2)}

/* ---------- tool shell ---------- */
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin:18px 0 8px;overflow:hidden}
.tool-head{padding:16px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfdfe,#f3f8fa)}
.tool-head h2{margin:0;font-size:1.2rem}
.tool-head p{margin:4px 0 0;color:var(--muted);font-size:.92rem}
.tool-body{padding:16px}
@media(min-width:760px){.tool-body,.tool-head{padding:22px 24px}}
.grid2{display:grid;gap:14px}
@media(min-width:640px){.grid2{grid-template-columns:1fr 1fr}}
.grid3{display:grid;gap:14px}
@media(min-width:760px){.grid3{grid-template-columns:repeat(3,1fr)}}
fieldset{border:0;margin:0 0 18px;padding:0;min-width:0}
legend{font-weight:700;font-size:1rem;margin:0 0 8px;padding:0}
label,.label{display:block;font-weight:600;font-size:.93rem;margin:0 0 6px}
.hint{display:block;font-weight:400;color:var(--muted);font-size:.84rem;margin-top:2px}
input[type=text],input[type=number],input[type=search],select{
  width:100%;min-height:46px;padding:10px 12px;border:1px solid var(--line-2);border-radius:8px;background:#fff;color:var(--ink);
  font:16px/1.3 var(--font);appearance:none;-webkit-appearance:none}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2310283a' stroke-width='2'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
input:focus,select:focus{border-color:var(--brand);outline:3px solid rgba(10,103,136,.25);outline-offset:0}
input[aria-invalid=true]{border-color:var(--red);background:#fffafa}
.inline{display:flex;gap:8px}
.inline > :first-child{flex:1 1 60%}
.inline > :last-child{flex:0 0 40%}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label{margin:0;flex:1 1 auto;text-align:center;border:1px solid var(--line-2);border-radius:8px;padding:10px 12px;min-height:46px;display:flex;align-items:center;justify-content:center;cursor:pointer;background:#fff;font-weight:600}
.seg input:checked + label{background:var(--brand);border-color:var(--brand);color:#fff}
.seg input:focus-visible + label{outline:3px solid var(--focus);outline-offset:2px}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:500}
.check input{width:22px;height:22px;margin:1px 0 0;flex:0 0 22px;accent-color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border-radius:8px;border:1px solid var(--brand);background:var(--brand);color:#fff;font:700 1rem var(--font);cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-dk);color:#fff}
.btn.ghost{background:#fff;color:var(--brand)}
.btn.ghost:hover{background:var(--brand-lt);color:var(--brand-dk)}
.btn.small{min-height:38px;padding:6px 12px;font-size:.9rem}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.note{font-size:.88rem;color:var(--muted)}
.error{color:var(--red);font-size:.86rem;margin-top:4px}

/* ---------- results ---------- */
.results{border-top:1px solid var(--line);background:#fbfdfe}
.results:empty{display:none}
.result-inner{padding:16px}
@media(min-width:760px){.result-inner{padding:22px 24px}}
.big{display:grid;gap:12px}
@media(min-width:640px){.big{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}}
.stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px}
.stat .k{font-size:.8rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.stat .v{font-size:1.7rem;font-weight:800;line-height:1.15;margin-top:4px;font-variant-numeric:tabular-nums}
.stat .s{font-size:.86rem;color:var(--ink-2);margin-top:4px}
.stat.hl{border-color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}
.callout{border-radius:10px;padding:14px 16px;margin:14px 0;border:1px solid;font-size:.95rem}
.callout strong:first-child{display:block;margin-bottom:2px}
.callout.red{background:var(--red-bg);border-color:#f3b8b2;color:#6f1710}
.callout.orange{background:var(--orange-bg);border-color:#f5c79b;color:#5c2a04}
.callout.amber{background:var(--amber-bg);border-color:#ecd98c;color:#4d3a00}
.callout.green{background:var(--green-bg);border-color:#a9d8b8;color:#134a28}
.callout.info{background:var(--brand-lt);border-color:#b5d8e6;color:#0b3d50}
.callout p{margin:.3em 0 0}
.callout ul{margin:.4em 0 0;padding-left:1.2em}

.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:10px;background:#fff;margin:12px 0}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#f3f7f9;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-2)}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.pick td{background:#eef7fb;font-weight:700}
.tag{display:inline-block;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:99px;white-space:nowrap}
.tag.red{background:var(--red-bg);color:var(--red)}
.tag.orange{background:var(--orange-bg);color:var(--orange)}
.tag.amber{background:var(--amber-bg);color:var(--amber)}
.tag.green{background:var(--green-bg);color:var(--green)}
.tag.grey{background:var(--grey-bg);color:var(--grey)}
.tag.blue{background:var(--brand-lt);color:var(--brand-dk)}

/* ---------- article ---------- */
.article{padding:8px 0 40px}
.article p,.article li{color:#1d3546}
.article ul,.article ol{padding-left:1.25em}
.article li{margin:.3em 0}
.toc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:20px 0}
.toc strong{display:block;margin-bottom:4px}
.toc ol{margin:0;padding-left:1.2em}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:0}
.faq summary{cursor:pointer;font-weight:700;padding:14px 16px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;line-height:1;color:var(--brand)}
.faq details[open] summary::after{content:"–"}
.faq details > div{padding:0 16px 14px}
.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:8px;padding:12px 14px;overflow-x:auto;white-space:pre-wrap}
.cards{display:grid;gap:12px;margin:14px 0}
@media(min-width:640px){.cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--brand);color:var(--ink)}
.card strong{display:block;color:var(--brand);margin-bottom:4px}
.card span{font-size:.9rem;color:var(--ink-2)}
.embed textarea{width:100%;min-height:92px;font:13px/1.4 ui-monospace,Menlo,Consolas,monospace;border:1px solid var(--line-2);border-radius:8px;padding:10px;resize:vertical;background:#fff;color:var(--ink)}
.sources li{font-size:.92rem}

/* ---------- footer ---------- */
.site-foot{background:var(--ink);color:#c9d8e1;padding:34px 0 26px;margin-top:40px;font-size:.92rem}
.site-foot a{color:#e6f0f5}
.foot-grid{display:grid;gap:22px}
@media(min-width:760px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr}}
.site-foot h2{font-size:.95rem;color:#fff;margin:0 0 8px}
.site-foot ul{list-style:none;margin:0;padding:0;columns:2;column-gap:16px}
.site-foot li{margin:0 0 6px;break-inside:avoid}
.site-foot .fine{border-top:1px solid rgba(255,255,255,.15);margin-top:22px;padding-top:14px;font-size:.82rem;color:#9fb4c1}
.droplet{width:34px;height:34px;margin-bottom:8px}

/* ---------- utilities ---------- */
.hidden{display:none!important}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.mt0{margin-top:0}
.center{text-align:center}

@media print{
  .topstrip,.site-head,.site-foot,.article,.no-print,.crumbs,.embed{display:none!important}
  body{background:#fff}
  .tool{box-shadow:none;border:0}
  .tool-body{display:none}
  .results{border:0;background:#fff}
  a{color:#000;text-decoration:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ---------- test results checker ---------- */
.ctx{display:grid;gap:10px;background:var(--brand-lt);border:1px solid #b5d8e6;border-radius:10px;padding:12px 14px;margin:0 0 16px}
.pgroup{border:1px solid var(--line);border-radius:10px;margin:0 0 12px;background:#fff}
.pgroup > summary{cursor:pointer;list-style:none;padding:13px 44px 13px 14px;position:relative;display:flex;flex-direction:column;gap:2px}
.pgroup > summary::-webkit-details-marker{display:none}
.pgroup > summary::after{content:"";position:absolute;right:16px;top:50%;width:10px;height:10px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:translateY(-70%) rotate(45deg);transition:transform .15s}
.pgroup[open] > summary::after{transform:translateY(-30%) rotate(-135deg)}
.pg-title{font-weight:800}
.pg-sub{font-size:.84rem;color:var(--muted)}
.plist{border-top:1px solid var(--line)}
.prow{padding:10px 14px;border-bottom:1px solid var(--line)}
.prow:last-child{border-bottom:0}
.pname{margin-bottom:6px}
.pctrl{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:8px}
.pctrl.one{grid-template-columns:1fr}
@media(min-width:720px){
  .prow{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:14px;align-items:center}
  .pname{margin:0}
  .prow .error{grid-column:2}
}
.rlist{display:grid;gap:12px;margin-top:16px}
@media(min-width:900px){.rlist{grid-template-columns:1fr 1fr}}
.rcard{background:#fff;border:1px solid var(--line);border-left:5px solid var(--line-2);border-radius:10px;padding:14px 16px}
.rcard.lv-red{border-left-color:var(--red)}
.rcard.lv-orange{border-left-color:#d9730d}
.rcard.lv-amber{border-left-color:#d8ad16}
.rcard.lv-blue{border-left-color:var(--brand)}
.rcard.lv-green{border-left-color:#2f9a58}
.rc-head{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.rc-head h3{margin:0;font-size:1.02rem}
.rc-val{margin:8px 0 6px}
.rc-ref{margin:2px 0;font-size:.86rem;color:var(--muted)}
.rc-extra{font-size:.9rem;background:#f6f9fb;border-radius:8px;padding:8px 10px;margin:8px 0 0}
.rc-more{margin-top:8px;font-size:.93rem}
.rc-more summary{cursor:pointer;color:var(--brand);font-weight:700;padding:4px 0}
.rc-more p{margin:.45em 0}
.gauge{position:relative;height:10px;background:#e9f0f4;border-radius:99px;margin:8px 0 8px;overflow:visible}
.g-fill{position:absolute;left:0;top:0;bottom:0;background:#2f9a58;border-radius:99px}
.g-fill.over{background:#d9730d}
.g-mark{position:absolute;top:-4px;bottom:-4px;width:2px;background:var(--ink);transform:translateX(-1px)}
.g-mark.soft{background:#9aaab4}
.g-band{position:absolute;top:0;bottom:0;background:#bfe3cc;border-radius:99px}
.g-dot{position:absolute;top:50%;width:16px;height:16px;border-radius:50%;background:var(--ink);border:3px solid #fff;box-shadow:0 0 0 1px var(--ink);transform:translate(-50%,-50%)}
.obs li{margin:.5em 0}
@media print{.rc-more{display:block}.rc-more summary{display:none}.rcard{break-inside:avoid}}

/* ---------- shock calculator ---------- */
.mt{margin-top:12px}
@media(min-width:760px){.span2{grid-column:span 2}}
.presets{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0 4px}
.presets .hint{margin:0 4px 0 0}
.pill{border:1px solid var(--line-2);background:#fff;color:var(--ink);border-radius:99px;padding:6px 14px;min-height:38px;font:600 .9rem var(--font);cursor:pointer}
.pill:hover{border-color:var(--brand);color:var(--brand)}
.steps{list-style:none;counter-reset:st;margin:8px 0 16px;padding:0}
.steps li{counter-increment:st;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:0 0 8px;background:#fff}
.steps li:has(input:checked){background:#f2f9f4;border-color:#bfe0c9}
.steps li:has(input:checked) strong{text-decoration:line-through;text-decoration-color:#6aa982}
.steps .check span{display:block}
.progress{height:8px;background:#e9f0f4;border-radius:99px;overflow:hidden}
.progress-bar{height:100%;width:0;background:var(--brand);transition:width .2s}
.countdown{font-size:clamp(2rem,9vw,3rem);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em;color:var(--brand-dk);margin:4px 0}
.timer-row{max-width:320px;margin-bottom:12px}

/* ---------- softener + hub ---------- */
.adv{margin-top:14px;border:1px dashed var(--line-2);border-radius:10px;padding:10px 14px;background:#fbfdfe}
.adv summary{cursor:pointer;font-weight:700;color:var(--brand)}
.tool-grid{display:grid;gap:14px;margin:18px 0 10px}
@media(min-width:720px){.tool-grid{grid-template-columns:1fr 1fr}}
.tool-card{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:border-color .15s,transform .15s}
.tool-card:hover{border-color:var(--brand);color:var(--ink);transform:translateY(-1px)}
.tool-card h2{margin:6px 0 0;font-size:1.25rem}
.tool-card p{margin:0;color:var(--ink-2)}
.tool-card .tag{align-self:flex-start}
.tool-card .go{margin-top:auto;padding-top:8px;font-weight:700;color:var(--brand)}

/* ---------- refinements after device testing ---------- */
.topstrip .wrap{flex-wrap:nowrap;justify-content:center;gap:8px;white-space:nowrap;font-size:.72rem}
.topstrip span+span::before{margin-right:8px}
@media(min-width:640px){.topstrip .wrap{justify-content:flex-start;font-size:.78rem}}
#wwc-out,#shock-out,#soft-out,.results,[id]{scroll-margin-top:84px}
.big{grid-template-columns:1fr 1fr}
@media(min-width:760px){.big{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}}
.stat{padding:12px}
.stat .v{font-size:clamp(1.25rem,5.2vw,1.7rem)}
.stat .k{font-size:.72rem}
.stat.hl.stat-red{border-color:var(--red);box-shadow:inset 0 0 0 1px var(--red);background:var(--red-bg)}
.stat.hl.stat-orange{border-color:#d9730d;box-shadow:inset 0 0 0 1px #d9730d;background:var(--orange-bg)}
.stat.hl.stat-amber{border-color:#d8ad16;box-shadow:inset 0 0 0 1px #d8ad16;background:var(--amber-bg)}
.rc-head{flex-wrap:wrap}
.rc-head h3{min-width:0;flex:1 1 60%}
.big .stat.hl:only-child,.big .stat.hl:first-child:nth-last-child(2){grid-column:auto}
td.dates{font-weight:700;font-variant-numeric:tabular-nums;min-width:9.5em}
.livebar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:var(--ink);color:#fff;font-weight:700;box-shadow:0 -4px 16px rgba(0,0,0,.18);transform:translateY(110%);transition:transform .2s}
.livebar.hidden{display:flex!important;visibility:hidden}
.livebar.show{transform:none;visibility:visible}
.livebar a{color:#fff;white-space:nowrap;font-weight:600}
@media(min-width:980px){.livebar{display:none!important}}
/* header layout: nav shares the logo row on wide screens */
.site-head .wrap{flex-wrap:wrap}
.site-nav{flex:1 0 100%;margin:0 -16px;border-top:1px solid var(--line)}
@media(min-width:980px) and (max-width:1239.98px){
  .menu-btn{display:inline-flex}
  .site-nav{display:none!important}
  .site-nav.open{display:block!important}
}
@media(min-width:1240px){
  .site-head .wrap{max-width:1240px}
  .menu-btn{display:none}
  .site-head .wrap{flex-wrap:nowrap}
  .site-nav{display:block!important;flex:0 1 auto;margin:0;border:0}
  .site-nav ul{display:flex;gap:0;padding:0}
  .site-nav a{white-space:nowrap;padding:8px 6px;font-size:.86rem}
}
@media(min-width:980px) and (max-width:1239.98px){.site-nav{margin:0 -16px}}
.logo img{max-width:170px}