/* TapSure — stylesheet
   Brand: navy #0B2545, blue #1479D6, taken from the logo.
   Look: plain and solid rather than glossy. Square corners, visible rules,
   flat surfaces, a warm paper ground against the cool navy. */

:root{
  --page:#F7FBFE;
  --paper:#FFFFFF;
  --sunk:#E3EFFA;
  --navy:#0B2545;
  --navy-deep:#071A33;
  --blue:#1479D6;
  --blue-deep:#0F5FA8;
  --blue-wash:#E9F3FD;
  --ink:#0B2545;
  --ink-soft:#4F6275;
  --ink-faint:#7E8E9C;
  --line:#D3E5F5;
  --line-soft:#E8F2FB;
  --amber:#8A5A08;
  --amber-wash:#FAF0DC;
  --good:#1F6B4A;
  --good-wash:#E4EFE8;
  --display:"Libre Franklin","Helvetica Neue",Arial,sans-serif;
  --body:"Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:4px;
  --r-lg:6px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --page:#0D1620;--paper:#132130;--sunk:#101B27;
    --navy:#0B1F38;--navy-deep:#06121F;
    --blue:#4C9EE8;--blue-deep:#7AB9EF;--blue-wash:#10283F;
    --ink:#E8EAEC;--ink-soft:#A2AEB9;--ink-faint:#78848F;
    --line:#26343F;--line-soft:#1C2832;
    --amber:#D9A24B;--amber-wash:#2B2211;
    --good:#4FA37C;--good-wash:#10281E;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --page:#0D1620;--paper:#132130;--sunk:#101B27;
  --navy:#0B1F38;--navy-deep:#06121F;
  --blue:#4C9EE8;--blue-deep:#7AB9EF;--blue-wash:#10283F;
  --ink:#E8EAEC;--ink-soft:#A2AEB9;--ink-faint:#78848F;
  --line:#26343F;--line-soft:#1C2832;
  --amber:#D9A24B;--amber-wash:#2B2211;
  --good:#4FA37C;--good-wash:#10281E;
  color-scheme:dark;
}

*{box-sizing:border-box}
body{margin:0;background:var(--page);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
h1,h2,h3,h4{font-family:var(--display);margin:0;line-height:1.16;letter-spacing:-.015em;text-wrap:balance}
h1{font-size:clamp(2rem,4.8vw,3.15rem);font-weight:800}
h2{font-size:clamp(1.5rem,3.2vw,2.15rem);font-weight:800}
h3{font-size:1.125rem;font-weight:700}
p{margin:0}
a{color:inherit}
button{font:inherit;color:inherit}
strong{font-weight:600}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ic{width:1.25rem;height:1.25rem;flex:none}
.ic-lg{width:1.55rem;height:1.55rem}
.skip{position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;padding:.7rem 1rem;z-index:99}
.skip:focus{left:.5rem;top:.5rem}
:focus-visible{outline:2.5px solid var(--blue);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.wrap{width:100%;max-width:74rem;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.wrap-narrow{max-width:48rem}
.section{padding-block:clamp(3.25rem,6.5vw,5.5rem)}
.section-alt{background:var(--sunk);border-block:1px solid var(--line-soft)}
.sec-head{display:flex;flex-direction:column;gap:.8rem;margin-bottom:2.5rem;max-width:44rem;border-top:3px solid var(--blue);padding-top:1.3rem}
.eyebrow{font-family:var(--body);font-size:.8125rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);display:flex;align-items:center;gap:.5rem}
.sec-lede{color:var(--ink-soft);font-size:1.0625rem;max-width:40rem}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border:1.5px solid transparent;border-radius:var(--r);padding:.7rem 1.25rem;font-family:var(--display);font-weight:700;font-size:.9375rem;text-decoration:none;cursor:pointer;transition:background .14s,border-color .14s;white-space:nowrap}
.btn-primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-primary:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn-dark{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-dark:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:.88rem 1.7rem;font-size:1.0625rem}
.btn-xl{padding:1rem 2rem;font-size:1.0625rem}
.full{width:100%}

/* ---------- header ---------- */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:var(--navy);border-bottom:3px solid var(--blue)}
.header-inner{display:flex;align-items:center;gap:1rem;min-height:4.4rem}
.brand{display:flex;align-items:center;text-decoration:none}
.brand img{height:2.05rem;width:auto;display:block}
.nav{display:flex;gap:1.5rem;margin-left:2.25rem}
.nav a{text-decoration:none;font-size:.9688rem;color:#B6C4D2}
.nav a:hover{color:#fff}
.header-cta{margin-left:auto;display:flex;gap:.6rem;align-items:center}
.header-cta .btn-ghost{border-color:rgba(255,255,255,.3);color:#fff}
.header-cta .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.burger{display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.25);border-radius:var(--r);width:2.6rem;height:2.6rem;padding:0;cursor:pointer;flex-direction:column;gap:4px;align-items:center;justify-content:center}
.burger span{width:16px;height:1.8px;background:#fff}
.mobile-nav{display:none;flex-direction:column;gap:.1rem;padding:.5rem 0 1.1rem;border-top:1px solid rgba(255,255,255,.12)}
.mobile-nav a{text-decoration:none;padding:.6rem .2rem;font-weight:600;color:#fff}
@media (max-width:62rem){.nav,.header-cta{display:none}.burger{display:flex}.mobile-nav[data-open="true"]{display:flex}}

/* ---------- hero ---------- */
.hero{position:relative;color:#fff;padding-block:clamp(3.25rem,7vw,5.5rem) clamp(4.5rem,8vw,7rem);overflow:hidden;background:var(--navy)}
.hero-photo{position:absolute;inset:0;background-image:url("../img/hero-install.jpg");background-size:cover;background-position:62% 42%;}
.hero-veil{position:absolute;inset:0;background:
  linear-gradient(100deg,rgba(9,46,86,.94) 0%,rgba(10,56,103,.88) 32%,rgba(13,86,152,.62) 64%,rgba(20,121,214,.42) 100%),
  linear-gradient(180deg,rgba(8,32,60,.4) 0%,rgba(8,32,60,0) 26%)}
.hero .wrap{position:relative;z-index:2}
.hero-grid{max-width:42rem}
.hero .eyebrow{color:#9BCBF2}
.dot{width:7px;height:7px;border-radius:50%;background:#5FD49A}
.hero h1{color:#fff;margin-top:.9rem;text-shadow:0 1px 20px rgba(4,18,34,.4)}
.hero h1 .hl{color:#83C6F5}
.hero-lede{color:#D3DFEA;font-size:1.0938rem;margin-top:1.1rem;max-width:33rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.9rem}
.hero-sig{margin-top:1.6rem;font-size:.9375rem;color:#B5C6D5;border-left:2px solid rgba(255,255,255,.28);padding-left:.9rem;max-width:30rem}
.hero-points{display:flex;flex-wrap:wrap;gap:.55rem 1.5rem;margin-top:1.8rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.22)}
.hero-points span{display:flex;align-items:center;gap:.45rem;font-size:.9063rem;color:#D3DFEA}
.hero-points svg{color:#5FD49A;width:1.05rem;height:1.05rem}
.hero-curve{position:absolute;left:0;right:0;bottom:-1px;z-index:3;line-height:0}
.hero-curve svg{display:block;width:100%;height:clamp(38px,5.5vw,82px)}
.hero-curve path{fill:var(--paper)}
@keyframes flow{to{stroke-dashoffset:-18}}
@media (max-width:62rem){.hero{background-position:70% 42%}}

/* ---------- trust strip ---------- */
.strip{background:var(--paper);border-bottom:1px solid var(--line)}
.strip-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:0}
.strip-item{display:flex;gap:.8rem;align-items:flex-start;min-width:0;padding:1.6rem 1.4rem 1.6rem 0;border-right:1px solid var(--line-soft)}
.strip-item:last-child{border-right:none}
.strip-item svg{color:var(--blue);margin-top:.15rem}
.strip-item strong{display:block;font-family:var(--display);font-weight:700;font-size:.9688rem}
.strip-item span{font-size:.875rem;color:var(--ink-soft);line-height:1.45}
@media (max-width:62rem){.strip-item{border-right:none;border-bottom:1px solid var(--line-soft);padding-right:0}.strip-item:last-child{border-bottom:none}}

/* ---------- calculator band ---------- */
.calc-band{background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--blue);padding:clamp(1.6rem,4vw,2.5rem);display:grid;grid-template-columns:1fr auto;gap:2rem;align-items:center}
.calc-band p{color:var(--ink-soft);margin-top:.6rem;max-width:36rem}
.calc-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.3rem;margin-top:1.1rem;font-size:.875rem;color:var(--ink-faint)}
.calc-meta span{display:flex;align-items:center;gap:.4rem}
.calc-meta svg{width:1rem;height:1rem;color:var(--good)}
@media (max-width:52rem){.calc-band{grid-template-columns:1fr}}

/* ---------- calculator ---------- */
.calc{background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--blue)}
.calc-top{display:flex;align-items:center;gap:1rem;padding:1rem clamp(1.1rem,3vw,1.7rem);border-bottom:1px solid var(--line);background:var(--sunk);flex-wrap:wrap}
.calc-top h2{font-size:1.0625rem;font-weight:700}
.calc-close{margin-left:auto;background:none;border:1px solid var(--line);border-radius:var(--r);padding:.35rem .85rem;font-size:.875rem;font-weight:600;cursor:pointer;color:var(--ink-soft)}
.calc-close:hover{border-color:var(--blue);color:var(--blue)}
.progress{display:flex;gap:.3rem;flex:1;max-width:18rem;min-width:8rem}
.progress i{height:4px;flex:1;background:var(--line);transition:background .25s}
.progress i.on{background:var(--blue)}
.calc-body{display:grid;grid-template-columns:1.15fr .85fr;min-height:30rem}
.calc-main{padding:clamp(1.4rem,3.2vw,2.2rem);display:flex;flex-direction:column}
.calc-side{background:var(--sunk);border-left:1px solid var(--line);padding:clamp(1.4rem,3vw,1.8rem);display:flex;flex-direction:column;gap:1.1rem}
@media (max-width:62rem){.calc-body{grid-template-columns:1fr}.calc-side{border-left:none;border-top:1px solid var(--line)}}

.step{display:none;flex-direction:column;gap:1.25rem;flex:1}
.step[data-on="true"]{display:flex}
.step-n{font-size:.8125rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}
.step h3{font-size:clamp(1.25rem,2.5vw,1.6rem);font-weight:800}
.step-sub{color:var(--ink-soft);font-size:.9688rem;margin-top:-.5rem}

.opts{display:grid;gap:.6rem}
.opt{text-align:left;background:var(--paper);border:1.5px solid var(--line);border-radius:var(--r);padding:.95rem 1.05rem;cursor:pointer;display:flex;gap:.85rem;align-items:flex-start;transition:border-color .14s,background .14s}
.opt:hover{border-color:var(--blue)}
.opt[aria-pressed="true"]{border-color:var(--blue);background:var(--blue-wash);box-shadow:inset 0 0 0 1px var(--blue)}
.opt-tick{width:1.15rem;height:1.15rem;border:1.5px solid var(--line);flex:none;margin-top:.2rem;display:grid;place-items:center}
.opt[aria-pressed="true"] .opt-tick{background:var(--blue);border-color:var(--blue)}
.opt-tick svg{width:.7rem;height:.7rem;color:#fff;opacity:0}
.opt[aria-pressed="true"] .opt-tick svg{opacity:1}
.opt-txt{min-width:0;flex:1}
.opt strong{display:block;font-family:var(--display);font-weight:700;font-size:1rem}
.opt small{display:block;color:var(--ink-soft);font-size:.875rem;line-height:1.45;margin-top:.15rem}
.opt .plus{font-family:var(--display);font-weight:700;font-size:.875rem;color:var(--blue);white-space:nowrap;margin-left:auto;align-self:center}
.opt .plus.inc{color:var(--good)}

.hint{background:var(--sunk);border-left:3px solid var(--blue);padding:.75rem .95rem;font-size:.9063rem;color:var(--ink-soft);line-height:1.5}
.hint b{color:var(--ink);font-weight:600}

.pump-cmp{display:grid;grid-template-columns:1fr 1fr;gap:.6rem}
@media (max-width:32rem){.pump-cmp{grid-template-columns:1fr}}
.pc{border:1.5px solid var(--line);border-radius:var(--r);padding:.9rem;background:var(--paper);cursor:pointer;text-align:left;display:flex;flex-direction:column;gap:.55rem;transition:border-color .14s,background .14s}
.pc:hover{border-color:var(--blue)}
.pc[aria-pressed="true"]{border-color:var(--blue);background:var(--blue-wash);box-shadow:inset 0 0 0 1px var(--blue)}
.pc-head{display:flex;align-items:baseline;gap:.5rem}
.pc-head strong{font-family:var(--display);font-weight:700;font-size:.9688rem}
.pc-head .plus{margin-left:auto;font-size:.875rem;font-weight:700;color:var(--blue)}
.pc-head .plus.inc{color:var(--good)}
.trace{display:block;width:100%;height:auto;background:var(--sunk);border:1px solid var(--line-soft)}
.trace .axis{stroke:var(--line);stroke-width:1}
.trace .band{fill:var(--good);opacity:.13}
.trace .line{fill:none;stroke:var(--blue);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.trace .line.rough{stroke:var(--amber)}
.trace .lbl{fill:var(--ink-faint);font-size:8px;font-family:var(--body)}
.pc small{color:var(--ink-soft);font-size:.875rem;line-height:1.45}

.dist-vis{background:var(--sunk);border:1px solid var(--line-soft);padding:1rem}
.dist-vis svg{display:block;width:100%;height:auto}
.dv-stroke{fill:none;stroke:var(--ink-soft);stroke-width:1.5}
.dv-fill{fill:var(--line-soft)}
.dv-run{fill:none;stroke:var(--blue);stroke-width:3;stroke-linecap:round;transition:stroke .2s}
.dv-run.over{stroke:var(--amber)}
.dv-cap{fill:var(--ink-soft);font-size:9px;font-family:var(--body);text-anchor:middle}

.step-nav{display:flex;gap:.7rem;margin-top:auto;padding-top:1.5rem}
.step-nav .btn{flex:1}
.step-nav .btn-ghost{flex:0 0 auto}

.live-head{display:flex;align-items:center;justify-content:space-between;gap:.6rem}
.live-head span{font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint);font-weight:600}
.chip{font-size:.75rem;font-weight:700;padding:.2rem .55rem;background:var(--blue);color:#fff;font-family:var(--display)}
.sys{display:block;width:100%;height:auto;background:var(--paper);border:1px solid var(--line-soft)}
.sys .st{fill:none;stroke:var(--ink-soft);stroke-width:1.6;stroke-linejoin:round}
.sys .sf{fill:var(--sunk)}
.sys .water{fill:var(--blue);opacity:.8}
.sys .pipe{fill:none;stroke:var(--blue);stroke-width:2.6;stroke-linecap:round}
.sys .cap{fill:var(--ink-faint);font-size:8.5px;font-family:var(--body);text-anchor:middle}
.sys .grp{opacity:0;transition:opacity .3s}
.sys .grp.on{opacity:1}
.sys .rotor{transform-origin:center;transform-box:fill-box}
.sys .rotor.spin{animation:spin 1.1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.tally{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem;font-size:.875rem}
.tally li{display:flex;gap:.6rem;align-items:baseline;color:var(--ink-soft)}
.tally li span:first-child{flex:1;min-width:0}
.tally li span:last-child{font-variant-numeric:tabular-nums;font-weight:600;color:var(--ink)}
.tally li.inc span:last-child{color:var(--good)}

.price-now{margin-top:auto;border-top:1px solid var(--line);padding-top:1rem}
.price-now .pl{font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint);font-weight:600}
.price-now .pv{font-family:var(--display);font-weight:800;font-size:clamp(2rem,4.2vw,2.5rem);letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-top:.2rem}
.price-now .pv .cur{font-size:.55em;color:var(--ink-soft);margin-right:.12em}
.price-now .ps{font-size:.875rem;color:var(--ink-soft);margin-top:.3rem}

.result{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}
@media (max-width:62rem){.result{grid-template-columns:1fr}}
.res-box{background:var(--sunk);border:1px solid var(--line-soft);padding:1.1rem 1.2rem}
.res-box h4{font-size:.9688rem;font-weight:700;margin-bottom:.65rem;display:flex;align-items:center;gap:.45rem}
.res-box h4 svg{width:1.05rem;height:1.05rem;color:var(--good)}
.res-box.warn{background:var(--amber-wash);border-color:transparent}
.res-box.warn h4 svg{color:var(--amber)}
.res-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem}
.res-list li{font-size:.875rem;color:var(--ink-soft);padding-left:1rem;position:relative;line-height:1.5}
.res-list li::before{content:"";position:absolute;left:0;top:.65em;width:6px;height:1px;background:var(--blue)}
.res-box.warn .res-list li::before{background:var(--amber)}

/* ---------- forms ---------- */
.qform{display:flex;flex-direction:column;gap:.85rem}
.field label{display:block;font-size:.875rem;font-weight:600;margin-bottom:.3rem}
.field .sub{font-size:.8125rem;color:var(--ink-faint);font-weight:400;margin-bottom:.35rem}
.field input,.select,textarea{width:100%;padding:.68rem .8rem;border:1.5px solid var(--line);border-radius:var(--r);background:var(--paper);color:var(--ink);font-family:var(--body);font-size:1rem}
.field input:focus,.select:focus{border-color:var(--blue);outline:none}
.two-up{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
@media (max-width:34rem){.two-up{grid-template-columns:1fr}}
.err{color:#A32A1C;font-size:.8125rem;margin-top:.25rem;min-height:1em}
:root[data-theme="dark"] .err,:root[data-theme="dark"] .status{color:#FF9385}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .err,:root:not([data-theme="light"]) .status{color:#FF9385}}
.carry{font-size:.875rem;color:var(--ink-soft);background:var(--sunk);border:1px solid var(--line-soft);padding:.6rem .75rem}
.fine{font-size:.8125rem;color:var(--ink-faint)}
.status{font-size:.9375rem;font-weight:600;color:#A32A1C;min-height:1.2em}
.thanks{margin-top:1.6rem;scroll-margin-top:6rem;padding:1.6rem;background:var(--paper);border:1.5px solid var(--line);border-top:4px solid var(--good);display:flex;flex-direction:column;gap:.9rem;outline:none;animation:thanks-in .35s ease-out}
.thanks[hidden]{display:none}
.thanks-mark{width:3rem;height:3rem;border-radius:50%;background:var(--good-wash);color:var(--good);display:grid;place-items:center}
.thanks-mark svg{width:1.5rem;height:1.5rem}
.thanks h4{font-family:var(--display);font-size:1.375rem;line-height:1.25;margin:0}
.thanks-lead{color:var(--ink-soft);margin:0}
.thanks-steps{list-style:none;counter-reset:t;margin:0;padding:0;display:flex;flex-direction:column;gap:.7rem}
.thanks-steps li{counter-increment:t;position:relative;padding-left:2.4rem;color:var(--ink-soft);font-size:.9375rem;line-height:1.5}
.thanks-steps li::before{content:counter(t);position:absolute;left:0;top:0;width:1.6rem;height:1.6rem;background:var(--blue);color:#fff;font-weight:700;font-size:.8125rem;display:grid;place-items:center}
.thanks-steps strong{color:var(--ink)}
.thanks-ref{font-size:.875rem;color:var(--ink-faint);background:var(--sunk);padding:.6rem .75rem;margin:0}
@keyframes thanks-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.thanks{animation:none}}

/* photo drops */
.drops{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
@media (max-width:34rem){.drops{grid-template-columns:1fr}}
.drop{border:1.5px dashed var(--line);border-radius:var(--r);padding:.9rem;background:var(--sunk);cursor:pointer;display:flex;flex-direction:column;gap:.45rem;align-items:flex-start;min-height:7rem;position:relative;overflow:hidden}
.drop:hover{border-color:var(--blue)}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer}
.drop svg{width:1.4rem;height:1.4rem;color:var(--blue)}
.drop strong{font-family:var(--display);font-size:.9063rem;font-weight:700}
.drop small{font-size:.8125rem;color:var(--ink-soft);line-height:1.4}
.drop img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.drop .done{position:absolute;right:.5rem;top:.5rem;z-index:2;background:var(--good);color:#fff;font-size:.75rem;font-weight:700;padding:.15rem .5rem}

/* ---------- why ---------- */
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr));gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
.why{background:var(--paper);padding:1.6rem 1.7rem;display:flex;flex-direction:column;gap:.7rem;min-width:0}
.why-ic{width:2.4rem;height:2.4rem;background:var(--blue);color:#fff;display:grid;place-items:center}
.why p{color:var(--ink-soft);font-size:.9688rem}

/* ---------- service area ---------- */
.area-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:2.5rem;align-items:start}
@media (max-width:62rem){.area-grid{grid-template-columns:1fr}}
.radius-fig{background:var(--paper);border:1px solid var(--line);padding:1.3rem}
.radius-fig svg{display:block;width:100%;height:auto}
.rf-ring{fill:none;stroke:var(--line);stroke-width:1.2;stroke-dasharray:4 5}
.rf-zone{fill:var(--blue);opacity:.05}
.rf-base{fill:var(--blue)}
.rf-pin{fill:var(--ink-soft)}
.rf-lbl{fill:var(--ink-soft);font-size:9px;font-family:var(--body)}
.rf-base-lbl{fill:var(--blue-deep);font-size:9.5px;font-weight:700;font-family:var(--display)}
.rf-ring-lbl{fill:var(--ink-faint);font-size:8px;font-family:var(--body);text-anchor:middle}

.checker{background:var(--paper);border:1px solid var(--line);border-top:4px solid var(--blue);padding:1.4rem}
.checker h3{margin-bottom:.3rem}
.checker p.sub{color:var(--ink-soft);font-size:.9375rem;margin-bottom:1rem}
.check-row{display:flex;gap:.6rem}
.check-row input{flex:1;min-width:0}
.check-out{margin-top:1rem;padding:.85rem 1rem;border-left:3px solid var(--line);background:var(--sunk);font-size:.9375rem}
.check-out.yes{border-color:var(--good);background:var(--good-wash)}
.check-out.maybe{border-color:var(--amber);background:var(--amber-wash)}
.check-out strong{display:block;font-family:var(--display);margin-bottom:.2rem}

.corridors{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1.4rem;margin-top:2rem}
.corridor h4{font-size:.8125rem;letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:.6rem}
.corridor p{font-size:.9375rem;color:var(--ink-soft);line-height:1.6}

/* ---------- how ---------- */
.how-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:start}
@media (max-width:62rem){.how-grid{grid-template-columns:1fr}}
.demo{background:var(--paper);border:1px solid var(--line);padding:1.3rem}
.demo-head{display:flex;align-items:center;justify-content:space-between;gap:.6rem;margin-bottom:1rem}
.demo-title{font-size:.75rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint);font-weight:600}
.chip-ok{background:var(--good-wash);color:var(--good)}
.chip-alert{background:var(--amber-wash);color:var(--amber)}
.demo-svg{display:block;width:100%;height:auto}
.demo-svg .pipe{fill:none;stroke:var(--line);stroke-width:4;stroke-linecap:round;transition:stroke .4s}
.demo-svg .pipe.live{stroke:var(--blue);stroke-dasharray:8 12;animation:flow 1.4s linear infinite}
.demo-svg .pipe.dead{stroke:var(--line);opacity:.55}
.demo-svg .node rect,.demo-svg .tank rect,.demo-svg .house path,.demo-svg .pump rect{fill:var(--sunk);stroke:var(--ink-soft);stroke-width:1.6}
.demo-svg text{fill:var(--ink-soft);font-size:9.5px;font-family:var(--body);text-anchor:middle}
.demo-svg .tank-fill{fill:var(--blue);stroke:none;opacity:.75;transition:y .8s,height .8s}
.demo-svg .valve circle{fill:var(--paper);stroke:var(--blue);stroke-width:2.2}
.demo-svg .valve path{stroke:var(--blue);stroke-width:2;transition:transform .5s;transform-origin:center;transform-box:fill-box}
.demo-svg .valve.flipped path{transform:rotate(90deg)}
.demo-svg .pump circle{fill:var(--blue);opacity:.85}
.demo-note{font-size:.9375rem;color:var(--ink-soft);margin:1rem 0;min-height:3.2em}
.step-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1.25rem}
.step-list li{display:flex;gap:1rem}
.step-list .num{width:2rem;height:2rem;background:var(--blue);color:#fff;font-family:var(--display);font-weight:700;font-size:.875rem;display:grid;place-items:center;flex:none}
.step-list strong{display:block;font-family:var(--display);font-weight:700;font-size:1.0313rem;margin-bottom:.2rem}
.step-list p{color:var(--ink-soft);font-size:.9375rem}

/* ---------- band ---------- */
.band{background:var(--sunk);color:var(--ink);padding-block:clamp(3rem,6vw,4.25rem)}
.band-inner{display:grid;grid-template-columns:1.25fr .75fr;gap:2.5rem;align-items:start}
@media (max-width:62rem){.band-inner{grid-template-columns:1fr}}
.band h2{color:var(--ink)}
.band p{color:var(--ink-soft);margin-top:1rem}
.band strong{color:var(--blue-deep);font-weight:700}
.band-src{font-size:.8125rem;color:var(--ink-faint);margin-top:1rem}
.band-tool{background:var(--paper);border:1px solid var(--line);border-top:3px solid var(--blue);padding:1.25rem}
.band-label{display:block;font-size:.875rem;font-weight:600;margin-bottom:.5rem;color:var(--ink)}
.band-tool .select{background:var(--paper);border-color:var(--line);color:var(--ink)}
.band-result{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--line)}
.area-badge{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:.2rem .55rem;background:var(--blue-wash);color:var(--blue-deep);margin-bottom:.5rem}
.band-result p{margin-top:.3rem;font-size:.9375rem;color:var(--ink-soft)}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:1.05rem .2rem;font-family:var(--display);font-weight:700;font-size:1.0313rem;list-style:none;display:flex;align-items:center;gap:.8rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";margin-left:auto;font-size:1.4rem;color:var(--blue);font-weight:600;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq p{padding:0 .2rem 1.1rem;color:var(--ink-soft);font-size:.9688rem;max-width:44rem}
.faq-cta{text-align:center;margin-top:2.5rem;display:flex;flex-direction:column;align-items:center;gap:.9rem}
.faq-cta p{color:var(--ink-soft)}

/* ---------- footer ---------- */
.site-footer{background:var(--navy-deep);color:#A4B3C1;padding-block:3rem 1.5rem;font-size:.9375rem}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2rem}
@media (max-width:62rem){.footer-inner{grid-template-columns:1fr 1fr}}
@media (max-width:32rem){.footer-inner{grid-template-columns:1fr}}
.foot-brand img{height:2.1rem;width:auto;margin-bottom:.9rem;display:block}
.foot-col h4{font-size:.8125rem;letter-spacing:.09em;text-transform:uppercase;color:#fff;margin-bottom:.8rem}
.foot-col a,.foot-col span{display:block;text-decoration:none;padding:.2rem 0;color:#A4B3C1}
.foot-col a:hover{color:#6FB5EC}
.foot-bottom{margin-top:2.5rem;padding-top:1.3rem;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:.5rem;font-size:.8125rem;color:#7B8EA1}

.wa-float{position:fixed;right:max(1rem,env(safe-area-inset-right,0px));bottom:calc(1rem + env(safe-area-inset-bottom,0px));z-index:35;display:flex;align-items:center;gap:.5rem;background:#1F8F4A;color:#fff;text-decoration:none;padding:.7rem 1.1rem;font-weight:700;font-size:.9063rem;font-family:var(--display);border-radius:var(--r)}
.wa-float svg{width:1.3rem;height:1.3rem}
@media (max-width:40rem){.wa-float span{display:none}.wa-float{padding:.85rem}}


/* ---------- curved transitions ----------
   A shallow bow between sections, filled with the colour of the band above,
   so the join reads as a soft edge rather than a ruled line. */
.curve{display:block;line-height:0;background:var(--to,var(--page))}
.curve svg{display:block;width:100%;height:clamp(34px,5vw,76px)}
.curve path{fill:var(--from,var(--navy))}
.curve-up{background:var(--to,var(--page))}

/* section surfaces */
.on-paper{background:var(--paper)}
.on-page{background:var(--page)}
.on-sunk{background:var(--sunk)}
.section-alt{background:var(--page);border-block:none}
.band{border-block:none}
.strip{border-bottom:none}
.site-footer{position:relative}

/* a little more variation between the bands */
.section-tight{padding-block:clamp(2.5rem,5vw,4rem)}
.rule-head{border-top:3px solid var(--blue);padding-top:1.4rem;display:inline-block}