/* ============================================================
ENERTECH SYSTEMS — shared brand system
sense · measure · analyze · control
Fonts are loaded via +
in the HTML (faster than @import — avoids a request chain).
============================================================ */
:root{
/* brand */
--yellow:#FECC00;
--yellow-deep:#F0B400;
--yellow-soft:#FFE27A;
--ink:#1A1A1C;
--grey:#5B5B5B;
--grey-2:#8B8B8E;
--paper:#FAFAF6;
--paper-2:#F1F0EA;
--card:#FFFFFF;
--line:rgba(26,26,28,.09);
--line-2:rgba(26,26,28,.16);
/* type */
--display:'Space Grotesk',sans-serif;
--body:'Manrope',sans-serif;
/* depth — layered 3D shadows */
--d1:0 1px 2px rgba(26,26,28,.06), 0 2px 6px rgba(26,26,28,.05);
--d2:0 8px 18px -6px rgba(26,26,28,.14), 0 2px 6px rgba(26,26,28,.06);
--d3:0 24px 50px -16px rgba(26,26,28,.26), 0 8px 18px -8px rgba(26,26,28,.12);
--d-yellow:0 14px 30px -10px rgba(240,180,0,.55);
--d-press:0 4px 0 0 var(--yellow-deep);
--d-press-ink:0 4px 0 0 #000;
--r-sm:10px; --r:16px; --r-lg:24px; --r-xl:34px;
--pad:clamp(20px,5vw,80px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
margin:0;
font-family:var(--body);
color:var(--ink);
background:var(--paper);
-webkit-font-smoothing:antialiased;
text-rendering:optimizeLegibility;
line-height:1.55;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);margin:0;line-height:1.02;letter-spacing:-.02em;font-weight:600}
p{margin:0}
/* ---------- type scale ---------- */
.eyebrow{
font-family:var(--display);font-weight:500;
font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
color:var(--grey);display:inline-flex;align-items:center;gap:.6em;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--yellow);display:inline-block}
.lead{font-size:clamp(1.05rem,1.5vw,1.28rem);color:var(--grey);max-width:54ch;font-weight:500}
/* ---------- layout ---------- */
.wrap{max-width:1280px;margin-inline:auto;padding-inline:var(--pad)}
section{position:relative}
/* ---------- buttons (extruded 3D) ---------- */
.btn{
--bg:var(--yellow);--fg:var(--ink);--press:var(--yellow-deep);
display:inline-flex;align-items:center;gap:.6em;
font-family:var(--display);font-weight:600;font-size:1rem;
padding:.92em 1.5em;border-radius:999px;border:0;cursor:pointer;
background:var(--bg);color:var(--fg);
box-shadow:0 4px 0 0 var(--press), var(--d2);
transition:transform .14s ease, box-shadow .14s ease, background .2s;
transform:translateY(0);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 0 0 var(--press), var(--d3)}
.btn:active{transform:translateY(2px);box-shadow:0 2px 0 0 var(--press), var(--d1)}
.btn--ink{--bg:var(--ink);--fg:#fff;--press:#000}
.btn--ghost{
background:transparent;color:var(--ink);
box-shadow:inset 0 0 0 1.5px var(--line-2);
}
.btn--ghost:hover{box-shadow:inset 0 0 0 1.5px var(--ink);transform:translateY(-2px)}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}
/* ---------- pills / chips ---------- */
.chip{
display:inline-flex;align-items:center;gap:.5em;
font-family:var(--display);font-weight:500;font-size:.82rem;
padding:.5em .9em;border-radius:999px;
background:var(--card);box-shadow:var(--d1);color:var(--ink);
}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--yellow)}
/* ---------- the 4-pillar motif ---------- */
.pillars{display:grid;gap:1px;background:var(--line)}
.pillar{
background:var(--card);padding:1.4rem 1.5rem;
display:flex;flex-direction:column;gap:.4rem;
transition:background .25s, transform .25s;
}
.pillar:hover{background:#fff;transform:translateY(-3px)}
.pillar .num{font-family:var(--display);font-size:.8rem;color:var(--grey-2);font-weight:500}
.pillar .name{font-family:var(--display);font-weight:600;font-size:1.15rem}
.pillar .desc{font-size:.9rem;color:var(--grey)}
/* ---------- product/category card with 3D tilt ---------- */
.card3d{
position:relative;border-radius:var(--r-lg);background:var(--card);
box-shadow:var(--d2);overflow:hidden;
transition:transform .25s ease, box-shadow .25s ease;
transform-style:preserve-3d;
}
.card3d:hover{transform:translateY(-6px);box-shadow:var(--d3)}
/* ---------- image placeholder ---------- */
.ph{
background:
repeating-linear-gradient(135deg,var(--paper-2) 0 10px,transparent 10px 20px),
var(--paper);
border:1px dashed var(--line-2);
display:flex;align-items:center;justify-content:center;
color:var(--grey-2);font-family:'Space Grotesk',monospace;
font-size:.72rem;letter-spacing:.04em;text-align:center;
border-radius:var(--r);
}
.ph--dark{
background:
repeating-linear-gradient(135deg,rgba(255,255,255,.04) 0 10px,transparent 10px 20px),
rgba(255,255,255,.03);
border-color:rgba(255,255,255,.14);color:rgba(255,255,255,.45);
}
/* ---------- header (shared base) ---------- */
.nav{
position:sticky;top:0;z-index:50;
backdrop-filter:saturate(140%) blur(12px);
background:rgba(250,250,246,.78);
border-bottom:1px solid var(--line);
}
.nav__in{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;height:72px}
.nav__logo{height:48px;width:auto}
/* vector brand logo (sharp at any size; adapts colour per background) */
.brand-link{display:inline-flex;align-items:center}
.brand{display:block;width:auto;overflow:visible}
.brand--nav{height:40px;color:var(--ink)}
.brand--foot{height:42px;color:#fff;margin-bottom:1.1rem}
@media(max-width:520px){.brand--nav{height:34px}}
.nav__links{display:flex;gap:1.6rem;align-items:center;font-family:var(--display);font-weight:500;font-size:.95rem}
.nav__links a{color:var(--grey);transition:color .2s}
.nav__links a:hover{color:var(--ink)}
.nav__burger{display:none;background:none;border:0;cursor:pointer}
@media(max-width:860px){
.nav__links{display:none}
.nav__burger{display:flex}
}
/* ---------- footer (shared) ---------- */
.foot{background:var(--ink);color:#fff;padding:clamp(48px,7vw,84px) 0 36px}
.foot a{color:rgba(255,255,255,.66);transition:color .2s}
.foot a:hover{color:var(--yellow)}
.foot__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:2.5rem}
.foot h4{font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--yellow);margin-bottom:1rem;font-weight:600}
.foot__logo{height:40px;margin-bottom:1.1rem}
.foot__tag{color:rgba(255,255,255,.55);max-width:30ch;font-size:.95rem}
.foot ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.6rem;font-size:.95rem}
.foot__bar{
margin-top:3rem;padding-top:1.4rem;border-top:1px solid rgba(255,255,255,.12);
display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
color:rgba(255,255,255,.5);font-size:.85rem;font-family:var(--display);
}
@media(max-width:860px){.foot__grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.foot__grid{grid-template-columns:1fr}}
/* ---------- reveal on scroll (progressive enhancement) ---------- */
/* base = visible. Hidden start-state only applied once JS confirms live painting. */
.reveal{opacity:1;transform:none}
html.reveals-on .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1)}
html.reveals-on .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html.reveals-on .reveal{opacity:1;transform:none;transition:none}}
/* ---------- utility ---------- */
.grid{display:grid}
.flex{display:flex}
.mono{font-family:'Space Grotesk',monospace}
.yellow-text{color:var(--yellow-deep)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;flex-wrap:wrap;margin-bottom:clamp(28px,4vw,52px)}
.section-head h2{font-size:clamp(1.9rem,4vw,3.1rem);max-width:16ch}
/* ============================================================
CATEGORY PAGES — shared layout (energy-metering, drives, etc.)
============================================================ */
/* breadcrumb */
.bc{font-family:var(--display);font-size:.85rem;color:var(--grey-2);padding-top:1.1rem}
.bc a{color:var(--grey)} .bc a:hover{color:var(--ink)}
.bc span{margin:0 .45em;color:var(--line-2)}
/* category hero */
.cat-hero{padding:clamp(26px,4vw,48px) 0 clamp(34px,5vw,62px)}
.cat-hero h1{font-size:clamp(2.3rem,5.5vw,4rem);font-weight:700;letter-spacing:-.03em;max-width:20ch;margin-top:1rem}
.cat-hero h1 em{font-style:normal;background:linear-gradient(transparent 60%,var(--yellow) 60% 92%,transparent 92%);padding:0 .05em}
.cat-hero .lead{margin-top:1.2rem}
.cat-cta{display:flex;gap:.9rem;flex-wrap:wrap;margin-top:1.8rem}
.cat-trust{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.5rem}
/* product grid */
.cat-sec{padding:clamp(36px,5vw,70px) 0}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
@media(max-width:820px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.cat-grid{grid-template-columns:1fr}}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.4rem;box-shadow:var(--d1);transition:transform .2s,box-shadow .2s}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--d2)}
.cat-card .tag{display:inline-block;margin-bottom:.6rem;font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--yellow-deep);font-family:var(--display);font-weight:600}
.cat-card h3{font-size:1.12rem;margin-bottom:.4rem}
.cat-card p{color:var(--grey);font-size:.9rem}
/* dark "why" band */
.cat-why{background:var(--ink);color:#fff;padding:clamp(48px,7vw,90px) 0}
.cat-why h2{color:#fff;font-size:clamp(1.8rem,4vw,2.8rem);max-width:20ch}
.cat-why .eyebrow{color:var(--yellow)}
.cat-why__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-top:2.2rem}
@media(max-width:760px){.cat-why__grid{grid-template-columns:1fr}}
.cat-why__item{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:var(--r-lg);padding:1.4rem}
.cat-why__item .ic{width:42px;height:42px;border-radius:12px;background:var(--yellow);color:var(--ink);display:grid;place-items:center;margin-bottom:.9rem;font-size:1.2rem}
.cat-why__item h3{color:#fff;font-size:1.12rem;margin-bottom:.35rem}
.cat-why__item p{color:rgba(255,255,255,.6);font-size:.9rem}
/* FAQ */
.faq{padding:clamp(48px,7vw,90px) 0}
.faq__list{margin-top:1.8rem;max-width:60rem}
.faq__item{border-top:1px solid var(--line);padding:1.3rem 0}
.faq__item:last-child{border-bottom:1px solid var(--line)}
.faq__item h3{font-size:1.12rem;margin-bottom:.45rem}
.faq__item p{color:var(--grey);max-width:72ch}
/* related categories */
.rel{padding:0 0 clamp(48px,7vw,90px)}
.rel__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.6rem}
@media(max-width:760px){.rel__grid{grid-template-columns:1fr}}
.rel__card{display:flex;align-items:center;justify-content:space-between;gap:1rem;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:1.1rem 1.3rem;box-shadow:var(--d1);font-family:var(--display);font-weight:600;transition:transform .2s,box-shadow .2s}
.rel__card:hover{transform:translateY(-3px);box-shadow:var(--d2)}
.rel__card .arr{color:var(--yellow-deep)}
/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--yellow),var(--yellow-soft));padding:clamp(44px,6vw,80px) 0;text-align:center}
.cta-band h2{font-size:clamp(1.8rem,4vw,2.8rem);max-width:20ch;margin-inline:auto}
.cta-band p{color:rgba(26,26,28,.72);margin:1rem auto 0;max-width:48ch;font-weight:500}
.cta-band .cta-row{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap;margin-top:1.8rem}
/* WhatsApp button (shared across pages) */
.btn--wa{--bg:#25D366;--fg:#fff;--press:#1da851}
.wa-fab{position:fixed;right:clamp(16px,3vw,28px);bottom:clamp(16px,3vw,28px);z-index:90;display:flex;align-items:center;height:60px;border-radius:999px;background:#25D366;color:#fff;box-shadow:0 12px 26px -8px rgba(37,211,102,.75), var(--d2);transition:transform .2s,box-shadow .2s;overflow:hidden}
.wa-fab .wa-ic{flex:0 0 auto;width:60px;height:60px;display:grid;place-items:center}
.wa-fab .wa-ic svg{width:32px;height:32px}
.wa-fab .wa-lbl{max-width:0;white-space:nowrap;overflow:hidden;opacity:0;font-family:var(--display);font-weight:600;font-size:.95rem;transition:max-width .28s,opacity .2s,padding .28s}
.wa-fab:hover{transform:translateY(-3px);box-shadow:0 16px 32px -8px rgba(37,211,102,.8), var(--d3)}
.wa-fab:hover .wa-lbl{max-width:200px;opacity:1;padding-right:1.2rem}
.wa-fab::before{content:"";position:absolute;inset:0;border-radius:999px;animation:wapulse 2.4s ease-out infinite}
@keyframes wapulse{0%{box-shadow:0 0 0 0 rgba(37,211,102,.45)}70%{box-shadow:0 0 0 16px rgba(37,211,102,0)}100%{box-shadow:0 0 0 0 rgba(37,211,102,0)}}
@media(prefers-reduced-motion:reduce){.wa-fab::before{animation:none}}
/* ============================================================
PRODUCT DETAIL & BRANDS PAGES
============================================================ */
.prose{max-width:66ch}
.prose p{color:var(--grey);font-size:1.02rem;margin-bottom:1rem}
.prose p:last-child{margin-bottom:0}
.brand-chips{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.5rem;align-items:center}
.brand-chips .lbl{font-family:var(--display);font-weight:600;font-size:.82rem;color:var(--grey)}
.appl{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.6rem}
.appl .chip{background:var(--paper-2);box-shadow:none;border:1px solid var(--line);color:var(--grey)}
/* linked product cards (category pages) */
a.cat-card{display:flex;flex-direction:column}
.cat-card__more{margin-top:auto;padding-top:.9rem;font-family:var(--display);font-weight:600;font-size:.85rem;color:var(--yellow-deep);display:inline-flex;align-items:center;gap:.4em}
.cat-card__more .arr{transition:transform .2s}
a.cat-card:hover .cat-card__more .arr{transform:translateX(3px)}
/* brands page */
.brands-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem;margin-top:1rem}
@media(max-width:760px){.brands-grid{grid-template-columns:1fr}}
.brand-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.9rem;box-shadow:var(--d1);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.brand-card:hover{transform:translateY(-4px);box-shadow:var(--d2)}
.brand-card .bn{font-family:var(--display);font-weight:700;font-size:1.55rem;letter-spacing:-.02em}
.brand-card .bt{font-family:var(--display);font-weight:600;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--yellow-deep);margin-top:.35rem}
.brand-card p{color:var(--grey);font-size:.95rem;margin-top:1rem}
.brand-card .bchips{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:1.2rem}
.brand-card .bchips span{font-size:.76rem;background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:.4em .85em;font-family:var(--display);color:var(--grey)}
.brand-card .blink{margin-top:1.4rem;font-family:var(--display);font-weight:600;font-size:.9rem;color:var(--ink);display:inline-flex;gap:.45em;align-items:center}
.brand-card .blink .arr{color:var(--yellow-deep);transition:transform .2s}
.brand-card:hover .blink .arr{transform:translateX(3px)}
/* genuine Enertech badge logo (raster) */
.brand-img{display:block;width:auto}
.brand-img--nav{height:48px}
.brand-img--foot{height:50px;margin-bottom:1.1rem}
@media(max-width:520px){.brand-img--nav{height:40px}}
/* ============================================================
PRODUCT/HOMEPAGE ILLUSTRATIONS (SVG instrument art)
============================================================ */
.cat-hero:has(.cat-hero__art){display:grid;grid-template-columns:1.2fr .82fr;gap:clamp(28px,4vw,58px);align-items:center}
.cat-hero__text{min-width:0}
@media(max-width:820px){.cat-hero:has(.cat-hero__art){grid-template-columns:1fr}}
.artframe{position:relative;border-radius:var(--r-xl);background:linear-gradient(158deg,#fff,var(--paper-2));border:1px solid var(--line);box-shadow:var(--d2);padding:clamp(20px,3vw,34px);overflow:hidden}
.artframe::after{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:26px 26px;opacity:.5;-webkit-mask-image:radial-gradient(70% 70% at 50% 45%,#000,transparent 75%);mask-image:radial-gradient(70% 70% at 50% 45%,#000,transparent 75%);pointer-events:none}
.artframe__glow{position:absolute;inset:0;background:radial-gradient(58% 58% at 70% 22%,rgba(254,204,0,.26),transparent 70%);pointer-events:none}
.artframe svg{position:relative;z-index:1;display:block;width:100%;height:auto;max-height:300px}
.artframe--sm{padding:clamp(14px,2vw,22px)}
.artframe--sm svg{max-height:150px}
/* homepage family illustration */
.b-fam__art{width:clamp(170px,24vw,240px);margin:0 0 1.4rem auto}
@media(max-width:820px){.b-fam__art{margin:0 0 1.1rem}}
/* AI-friendly "key facts" bar (product pages) */
.kf-wrap{padding:0 var(--pad) clamp(8px,2vw,18px)}
.keyfacts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin:0}
.keyfacts>div{background:var(--card);padding:1rem 1.1rem}
.keyfacts dt{font-family:var(--display);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--grey-2);margin-bottom:.35rem}
.keyfacts dd{margin:0;font-family:var(--display);font-weight:600;font-size:.92rem;color:var(--ink);line-height:1.3}
@media(max-width:720px){.keyfacts{grid-template-columns:1fr 1fr}}
@media(max-width:420px){.keyfacts{grid-template-columns:1fr}}