/* wx.css: interactive components for the water pages in the site navigation (Oct 22 2026).
   Brand rules: Inter, flat teal #1D7686, square corners, no gradients, no letter-spacing. */
:root{--wx-teal:#1D7686;--wx-teal-d:#155f6c;--wx-ink:#1f2a2d;--wx-muted:#5b6f78;--wx-line:#d9e4e6;--wx-soft:#f2f8f9;--wx-ease:cubic-bezier(.2,.7,.2,1)}

/* ---------- Image stepper (How it works, How we work) ---------- */
.wx-steps{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(28px,4vw,64px);align-items:stretch;margin-top:clamp(32px,3.4vw,52px);text-align:left}
.wx-steps-list{display:flex;flex-direction:column;justify-content:center;border-top:1px solid var(--wx-line)}
.wx-step{appearance:none;background:none;border:0;border-bottom:1px solid var(--wx-line);border-radius:0;margin:0;font:inherit;color:inherit;text-align:left;cursor:pointer;
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:8px;padding:24px 8px 24px 0;position:relative;width:100%}
.wx-step:focus-visible{outline:2px solid var(--wx-teal);outline-offset:-2px}
.wx-step-n{font-size:15px;font-weight:600;line-height:28px;color:#8a9ca3;font-variant-numeric:tabular-nums;transition:color .25s}
.wx-step-t{display:block;font-size:20px;font-weight:600;line-height:28px;color:var(--wx-ink);transition:color .25s}
.wx-step-d{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .45s var(--wx-ease),opacity .35s}
.wx-step-d>span{overflow:hidden;display:block;font-size:17px;line-height:1.65;color:var(--wx-muted)}
.wx-step.is-on .wx-step-d{grid-template-rows:1fr;opacity:1}
.wx-step.is-on .wx-step-d>span{padding-top:10px}
.wx-step.is-on .wx-step-n,.wx-step.is-on .wx-step-t,.wx-step:hover .wx-step-t{color:var(--wx-teal)}
.wx-step-bar{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.wx-step-bar i{display:block;height:100%;width:0;background:var(--wx-teal)}
.wx-step.is-on .wx-step-bar i{width:100%}
[data-wx-steps].is-auto .is-on .wx-step-bar i{animation:wxbar var(--wx-dur,6.5s) linear forwards}
[data-wx-steps].is-paused .is-on .wx-step-bar i,[data-wx-steps].is-paused .wx-tl-timer i{animation-play-state:paused}
@keyframes wxbar{from{width:0}to{width:100%}}
.wx-steps-stage{position:relative;min-height:460px;background:var(--wx-soft);overflow:hidden}
.wx-steps-fig{position:absolute;inset:0;margin:0;opacity:0;transition:opacity .6s var(--wx-ease)}
.wx-steps-fig.is-on{opacity:1;z-index:1}
.wx-steps-fig img{width:100%;height:100%;object-fit:cover;display:block;transform:scale(1.05);transition:transform 7s var(--wx-ease)}
.wx-steps-fig.is-on img{transform:scale(1)}
.wx-steps-fig figcaption{position:absolute;left:0;bottom:0;background:var(--wx-teal);color:#fff;font-size:15px;font-weight:600;padding:12px 18px;font-variant-numeric:tabular-nums}
@media (max-width:860px){
  .wx-steps{grid-template-columns:1fr;gap:20px}
  .wx-steps-stage{order:-1;min-height:0;aspect-ratio:4/3}
  .wx-step{padding:18px 4px 18px 0;grid-template-columns:42px minmax(0,1fr)}
  .wx-step-t{font-size:18px}
}

/* ---------- Phase timeline (PFAS pilot) ---------- */
.wx-tl{margin-top:clamp(32px,3.4vw,52px)}
.wx-tl-nav{position:relative;display:grid;grid-template-columns:repeat(var(--n),minmax(0,1fr))}
.wx-tl-line{position:absolute;top:25px;left:calc(50% / var(--n));right:calc(50% / var(--n));height:2px;background:var(--wx-line)}
.wx-tl-line i{display:block;height:100%;width:var(--wx-p,0%);background:var(--wx-teal);transition:width .6s var(--wx-ease)}
.wx-tl-node{appearance:none;background:none;border:0;border-radius:0;margin:0;font:inherit;cursor:pointer;position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;gap:8px;padding:0 10px 26px;text-align:center}
.wx-tl-node:focus-visible{outline:2px solid var(--wx-teal);outline-offset:2px}
.wx-tl-dot{width:52px;height:52px;display:grid;place-items:center;background:#fff;border:2px solid var(--wx-line);color:#8a9ca3;transition:background .3s,border-color .3s,color .3s;margin-bottom:6px}
.wx-tl-dot svg{width:22px;height:22px}
.wx-tl-node.is-done .wx-tl-dot{border-color:var(--wx-teal);color:var(--wx-teal)}
.wx-tl-node.is-on .wx-tl-dot{background:var(--wx-teal);border-color:var(--wx-teal);color:#fff}
.wx-tl-node:hover .wx-tl-dot{border-color:var(--wx-teal);color:var(--wx-teal)}
.wx-tl-node.is-on:hover .wx-tl-dot{color:#fff}
.wx-tl-k{font-size:14px;font-weight:600;color:#8a9ca3;font-variant-numeric:tabular-nums}
.wx-tl-t{font-size:18px;font-weight:600;line-height:1.3;color:var(--wx-ink);transition:color .25s}
.wx-tl-node.is-on .wx-tl-k,.wx-tl-node.is-on .wx-tl-t{color:var(--wx-teal)}
.wx-tl-stage{position:relative;background:var(--wx-soft);border-top:2px solid var(--wx-teal)}
.wx-tl-panel{display:none;grid-template-columns:auto minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start;padding:clamp(28px,3.6vw,48px) clamp(24px,4vw,56px)}
.wx-tl-panel.is-on{display:grid;animation:wxin .5s var(--wx-ease)}
.wx-tl-big{font-size:clamp(56px,6vw,88px);font-weight:600;line-height:.9;color:var(--wx-teal);font-variant-numeric:tabular-nums}
.wx-tl-panel h3{font-size:clamp(22px,2vw,28px);font-weight:600;line-height:1.25;color:var(--wx-ink);margin:0 0 12px}
.wx-tl-panel p{font-size:18px;line-height:1.7;color:var(--wx-muted);margin:0;max-width:760px}
.wx-tl-timer{position:absolute;left:0;right:0;bottom:0;height:3px}
.wx-tl-timer i{display:block;height:100%;width:0;background:var(--wx-teal)}
[data-wx-steps].is-auto .wx-tl-timer i{animation:wxbar var(--wx-dur,7s) linear forwards}
@keyframes wxin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (max-width:760px){
  .wx-tl-node{padding:0 2px 18px}
  .wx-tl-t{display:none}
  .wx-tl-dot{width:44px;height:44px}
  .wx-tl-line{top:21px}
  .wx-tl-k{font-size:12px}
  .wx-tl-panel{grid-template-columns:1fr;gap:10px;padding:24px 20px}
  .wx-tl-big{font-size:44px}
  .wx-tl-panel p{font-size:17px}
}

/* ---------- Spec explorer (PFAS pilot skid) ---------- */
.wx-tabs{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);border:1px solid var(--wx-line);background:#fff;margin-top:8px}
.wx-tabs-list{display:flex;flex-direction:column;border-right:1px solid var(--wx-line)}
.wx-tab{appearance:none;background:#fff;border:0;border-bottom:1px solid var(--wx-line);border-radius:0;margin:0;font:inherit;cursor:pointer;text-align:left;position:relative;
  display:grid;grid-template-columns:40px minmax(0,1fr) auto;align-items:center;gap:16px;padding:16px 22px;transition:background .25s}
.wx-tab:last-child{border-bottom:0}
.wx-tab:focus-visible{outline:2px solid var(--wx-teal);outline-offset:-2px}
.wx-tab::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--wx-teal);transform:scaleY(0);transition:transform .3s var(--wx-ease)}
.wx-tab-ico{width:40px;height:40px;display:grid;place-items:center;background:var(--wx-soft);color:var(--wx-teal);transition:background .25s,color .25s}
.wx-tab-ico svg{width:20px;height:20px}
.wx-tab-t{font-size:17px;font-weight:600;line-height:1.35;color:var(--wx-ink)}
.wx-tab-n{font-size:14px;font-weight:600;color:#8a9ca3;font-variant-numeric:tabular-nums}
.wx-tab:hover{background:var(--wx-soft)}
.wx-tab.is-on{background:var(--wx-soft)}
.wx-tab.is-on::before{transform:scaleY(1)}
.wx-tab.is-on .wx-tab-ico{background:var(--wx-teal);color:#fff}
.wx-tab.is-on .wx-tab-t,.wx-tab.is-on .wx-tab-n{color:var(--wx-teal)}
.wx-tabs-stage{display:flex;flex-direction:column;padding:clamp(28px,4vw,56px)}
.wx-tab-panel{display:none}
.wx-tab-panel.is-on{display:block;animation:wxin .45s var(--wx-ease)}
.wx-tab-k{display:block;font-size:14px;font-weight:600;color:var(--wx-teal);margin-bottom:22px;font-variant-numeric:tabular-nums}
.wx-tab-big{width:72px;height:72px;display:grid;place-items:center;background:var(--wx-teal);color:#fff;margin-bottom:26px}
.wx-tab-big svg{width:34px;height:34px}
.wx-tab-panel h3{font-size:clamp(24px,2.2vw,30px);font-weight:600;line-height:1.2;color:var(--wx-ink);margin:0 0 14px}
.wx-tab-panel p{font-size:18px;line-height:1.7;color:var(--wx-muted);margin:0;max-width:560px}
.wx-tabs-cta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--wx-teal);color:#fff;text-decoration:none;padding:20px 24px;transition:background .25s}
.wx-tab-panel.is-on{margin-bottom:36px}
.wx-tabs-cta b{display:block;font-size:18px;font-weight:600;margin-bottom:2px}
.wx-tabs-cta span{font-size:16px;line-height:1.5}
.wx-tabs-go{width:40px;height:40px;flex:none;display:grid;place-items:center;border:1px solid rgba(255,255,255,.5);transition:background .25s,color .25s}
.wx-tabs-go svg{width:16px;height:16px}
.wx-tabs-cta:hover{background:var(--wx-teal-d)}
.wx-tabs-cta:hover .wx-tabs-go{background:#fff;color:var(--wx-teal)}
@media (max-width:860px){
  .wx-tabs{grid-template-columns:1fr}
  .wx-tabs-list{flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--wx-line);scrollbar-width:none}
  .wx-tabs-list::-webkit-scrollbar{display:none}
  .wx-tab{flex:0 0 auto;grid-template-columns:auto;padding:14px;border-bottom:0;border-right:1px solid var(--wx-line)}
  .wx-tab-t,.wx-tab-n{display:none}
  .wx-tab::before{left:0;right:0;top:auto;bottom:0;width:auto;height:3px;transform:scaleX(0)}
  .wx-tab.is-on::before{transform:scaleX(1)}
  .wx-tabs-stage{padding:26px 20px}
  .wx-tab-big{width:56px;height:56px;margin-bottom:18px}
  .wx-tab-panel p{font-size:17px}
}

/* ---------- FAQ (RSSCT and SEA-IX product pages) ---------- */
.rs-faq-grid,.pd-faq-grid{grid-template-columns:minmax(0,4fr) minmax(0,7fr) !important;gap:clamp(32px,5vw,80px) !important}
@media (min-width:1001px){.rs-faq-grid>div:first-child,.pd-faq-grid>div:first-child{position:sticky;top:110px}}
.rs-faq-grid>div:first-child>p:last-child,.pd-faq-grid>div:first-child>p:last-child{margin-top:28px !important;padding:20px 22px;background:#fff;border:1px solid var(--wx-line);border-left:3px solid var(--wx-teal);font-size:17px;line-height:1.6;color:var(--wx-ink)}
.pd-faq-grid>div:first-child>p:last-child{background:var(--wx-soft)}
.rs-faq .faq,.pd-faq .faq{counter-reset:wxq;background:#fff;border:1px solid var(--wx-line)}
.rs-faq .faq-item,.pd-faq .faq-item{counter-increment:wxq;position:relative;background:#fff !important;border:0 !important;border-bottom:1px solid var(--wx-line) !important;margin:0 !important;transition:background .25s}
.rs-faq .faq-item:last-child,.pd-faq .faq-item:last-child{border-bottom:0 !important}
.rs-faq .faq-item::before,.pd-faq .faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--wx-teal);transform:scaleY(0);transform-origin:top;transition:transform .35s var(--wx-ease)}
.rs-faq .faq-q,.pd-faq .faq-q{display:grid !important;grid-template-columns:44px minmax(0,1fr) 36px;align-items:center;gap:10px;padding:22px 24px !important;font-size:18px !important;font-weight:600 !important;line-height:1.4;color:var(--wx-ink) !important;text-align:left;transition:color .25s}
.rs-faq .faq-q::before,.pd-faq .faq-q::before{content:counter(wxq,decimal-leading-zero);font-size:14px;font-weight:600;color:#8a9ca3;font-variant-numeric:tabular-nums}
.rs-faq .faq-q .pm,.pd-faq .faq-q .pm{width:36px;height:36px;border:1px solid var(--wx-line);background:#fff;color:var(--wx-teal);display:grid;place-items:center;transition:background .25s,border-color .25s,color .25s}
.rs-faq .faq-q:hover,.pd-faq .faq-q:hover{color:var(--wx-teal) !important}
.rs-faq .faq-q:hover .pm,.pd-faq .faq-q:hover .pm{border-color:var(--wx-teal)}
.rs-faq .faq-q:focus-visible,.pd-faq .faq-q:focus-visible{outline:2px solid var(--wx-teal);outline-offset:-2px}
.rs-faq .faq-item.open,.pd-faq .faq-item.open{background:var(--wx-soft) !important}
.rs-faq .faq-item.open::before,.pd-faq .faq-item.open::before{transform:scaleY(1)}
.rs-faq .faq-item.open .faq-q,.pd-faq .faq-item.open .faq-q{color:var(--wx-teal) !important}
.rs-faq .faq-item.open .faq-q::before,.pd-faq .faq-item.open .faq-q::before{color:var(--wx-teal)}
.rs-faq .faq-item.open .pm,.pd-faq .faq-item.open .pm{background:var(--wx-teal);border-color:var(--wx-teal);color:#fff}
.rs-faq .faq-a p,.pd-faq .faq-a p{padding:0 72px 26px 78px !important;font-size:17px !important;line-height:1.7 !important;color:var(--wx-muted) !important;margin:0}
@media (max-width:640px){
  .rs-faq .faq-q,.pd-faq .faq-q{grid-template-columns:32px minmax(0,1fr) 32px;padding:18px 16px !important;font-size:17px !important}
  .rs-faq .faq-q .pm,.pd-faq .faq-q .pm{width:32px;height:32px}
  .rs-faq .faq-a p,.pd-faq .faq-a p{padding:0 18px 22px 58px !important;font-size:16px !important}
}

/* ---------- Interactive breakthrough charts ---------- */
.ix-figure{position:relative}
.ix-chart{cursor:crosshair;touch-action:pan-y}
.ix-chart .wx-hair{pointer-events:none}
.wx-tip{position:absolute;z-index:3;pointer-events:none;background:#fff;border:1px solid var(--wx-line);border-top:3px solid var(--wx-teal);box-shadow:0 10px 30px rgba(20,40,45,.12);padding:10px 12px;min-width:210px;font-size:13px;line-height:1.45;color:var(--wx-ink);opacity:0;transition:opacity .15s}
.wx-tip.is-on{opacity:1}
.wx-tip b{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--wx-teal)}
.wx-tip div{display:grid;grid-template-columns:12px minmax(0,1fr) auto;gap:8px;align-items:center}
.wx-tip div i{width:10px;height:10px;display:block}
.wx-tip div em{font-style:normal;font-weight:600;font-variant-numeric:tabular-nums}
.ix-legend li{cursor:pointer;transition:opacity .2s;user-select:none}
.ix-legend li:focus-visible{outline:2px solid var(--wx-teal);outline-offset:2px}
.ix-legend li.is-off{opacity:.35;text-decoration:line-through}
.wx-chart-hint{display:block;font-size:13px;color:#8a9ca3;margin-top:6px}
.ix-chart .wx-dim{opacity:.12;transition:opacity .2s}
.ix-chart .wx-hide{opacity:0}

/* ---------- Continuous improvement steps: light up in sequence ---------- */
.cip-steps.wx-cip .cip-ico{background:#fff;color:var(--wx-teal);border:2px solid var(--wx-line);transition:background .4s,border-color .4s,color .4s}
.cip-steps.wx-cip .cip-step::after{content:"";position:absolute;top:24px;right:50%;width:100%;height:2px;background:var(--wx-teal);z-index:0;transform:scaleX(0);transform-origin:left;transition:transform .5s var(--wx-ease)}
.cip-steps.wx-cip .cip-step:first-child::after{display:none}
.cip-steps.wx-cip .cip-step.is-lit .cip-ico{background:var(--wx-teal);border-color:var(--wx-teal);color:#fff}
.cip-steps.wx-cip .cip-step.is-lit::after{transform:scaleX(1)}
.cip-steps.wx-cip .cip-step{cursor:default}
.cip-steps.wx-cip .cip-step:hover .cip-ico{transform:translateY(-3px);transition:transform .25s,background .4s}
.cip-step p{font-size:15px !important}
@media(max-width:760px){.cip-steps.wx-cip .cip-step::after{display:none}}

/* ---------- Card hover states on the water pages ---------- */
.scard,.resin-card,.card,.rsb,.mc2,.chal-card,.life-card,.wtype-card,.crit-card,.pd-app{transition:transform .3s var(--wx-ease),box-shadow .3s var(--wx-ease),border-color .3s}
.scard img,.mc2 img,.wtype-card img,.pd-app img,.resin-card img,.card img{transition:transform .7s var(--wx-ease)}
@media (hover:hover){
  .scard:hover,.resin-card:hover,.card:hover,.mc2:hover,.life-card:hover,.wtype-card:hover,.crit-card:hover,.pd-app:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,60,70,.10);border-color:#b9d3d7}
  .chal-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,60,70,.16)}
  .rsb:hover{background:var(--wx-soft)}
  .scard:hover img,.mc2:hover img,.wtype-card:hover img,.pd-app:hover img,.resin-card:hover img,.card:hover img{transform:scale(1.04)}
  .card:hover .ico,.rsb:hover .ico,.life-card:hover .ico,.crit-card:hover .ico{background:var(--wx-teal);color:#fff}
}
.card .ico,.rsb .ico,.life-card .ico,.crit-card .ico{transition:background .3s,color .3s}
:is(.scard,.mc2,.wtype-card,.pd-app,.resin-card,.card) :is(figure,.pd-app-media,.mc2-media,.scard-media,div:has(>img)){overflow:hidden}


/* Contaminant tiles (Water Treatment Solutions) */
.cont-card{transition:background .3s,color .3s;cursor:default}
.cont-card .cont-img{transition:transform .4s var(--wx-ease)}
@media (hover:hover){
  .cont-card:hover{background:var(--wx-teal) !important}
  .cont-card:hover .cont-txt strong{color:#fff !important}
  .cont-card:hover .cont-txt span{color:#d6ecef !important}
  .cont-card:hover .cont-img{transform:scale(1.06)}
}

/* Compare table rows (SEA-IX product pages) */
.pd-cmp tbody tr{transition:background .2s}
@media (hover:hover){.pd-cmp tbody tr:hover td{background:var(--wx-soft)}}

@media (prefers-reduced-motion:reduce){
  .wx-steps-fig,.wx-steps-fig img,.wx-tl-panel,.wx-tab-panel,.wx-step-d{transition:none !important;animation:none !important}
}
@media (max-width:1000px){.rs-faq-grid,.pd-faq-grid{grid-template-columns:1fr !important;gap:28px !important}}

/* ---------- Brochure cards (cover preview + download) ---------- */
.bro-card{display:grid;grid-template-columns:112px minmax(0,1fr);gap:22px;align-items:center;max-width:470px;margin-top:28px;padding:16px 22px 16px 16px;background:#fff;border:1px solid var(--wx-line);text-decoration:none;color:var(--wx-ink);transition:border-color .3s,box-shadow .3s var(--wx-ease),transform .3s var(--wx-ease)}
.bro-thumb{display:block;position:relative;background:var(--wx-soft);box-shadow:0 6px 18px rgba(20,50,58,.16);transition:transform .4s var(--wx-ease),box-shadow .4s var(--wx-ease)}
.bro-thumb img{display:block;width:100%;height:auto;aspect-ratio:480/621;object-fit:cover;object-position:top}
.bro-meta{display:flex;flex-direction:column;gap:6px;min-width:0}
.bro-k{font-size:14px;font-weight:500;color:var(--wx-muted)}
.bro-t{font-size:19px;font-weight:600;line-height:1.3;color:var(--wx-ink)}
.bro-dl{display:inline-flex;align-items:center;gap:8px;margin-top:6px;font-size:16px;font-weight:600;color:var(--wx-teal)}
.bro-dl svg{width:18px;height:18px;padding:5px;box-sizing:content-box;background:var(--wx-soft);transition:background .25s,color .25s}
@media (hover:hover){
  .bro-card:hover{border-color:#b9d3d7;box-shadow:0 16px 36px rgba(20,60,70,.10)}
  .bro-card:hover .bro-thumb{transform:translateY(-4px) rotate(-1.5deg);box-shadow:0 14px 28px rgba(20,50,58,.22)}
  .bro-card:hover .bro-dl svg{background:var(--wx-teal);color:#fff}
}
.bro-card:focus-visible{outline:2px solid var(--wx-teal);outline-offset:3px}
.bro-card--dark{border-color:#fff}
.bro-wrap{margin-top:8px}
.order-media + * .bro-card,.reason-head-r .bro-card{margin-top:24px}
@media (max-width:600px){.bro-card{grid-template-columns:84px minmax(0,1fr);gap:16px;padding:14px}.bro-t{font-size:17px}}