/* ============================================================
   INI HOME SERVICE PTE. LTD.
   Direction: SCHEMATIC. A technician's worksheet — pale
   engineering grid, graphite ink, signal-green status, copper
   for live parts. Everything labelled like a service manual.
   ============================================================ */
:root{
  --sheet:#EEF1F4;        /* worksheet base */
  --sheet-2:#F8FAFB;      /* raised panel */
  --grid:rgba(31,45,58,.055);
  --graphite:#1F2D3A;
  --graphite-72:rgba(31,45,58,.72);
  --graphite-52:rgba(31,45,58,.52);
  --rule:rgba(31,45,58,.16);
  --rule-soft:rgba(31,45,58,.09);
  --signal:#0E9F6E;       /* status green */
  --signal-dk:#0A7C56;
  --copper:#C2622E;       /* live / warning */
  --slate:#123047;        /* dark band */

  --display:"Chivo","Helvetica Neue",Arial,sans-serif;
  --body:"Figtree","Segoe UI",Helvetica,Arial,sans-serif;
  --mono:"Roboto Mono",ui-monospace,Consolas,monospace;

  --wrap:1180px;
  --gutter:clamp(20px,5vw,48px);
  --band:clamp(64px,9vw,112px);
  --r:6px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;color:var(--graphite);
  background-color:var(--sheet);
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:26px 26px;
  font-family:var(--body);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}
.band{padding-block:var(--band)}

/* type ------------------------------------------------------ */
h1,h2,h3{font-family:var(--display);font-weight:800;line-height:1.05;letter-spacing:-.025em;margin:0}
h1{font-weight:900;font-size:clamp(38px,5.9vw,70px)}
h2{font-size:clamp(28px,3.9vw,46px)}
h3{font-size:clamp(17px,1.6vw,20px);font-weight:700;line-height:1.24;letter-spacing:-.015em}
p{margin:0}
.lede{font-size:clamp(17px,1.65vw,19.5px);line-height:1.6;color:var(--graphite-72);max-width:56ch}

.ref{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--signal-dk);display:inline-flex;align-items:center;gap:9px;
}
.ref::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--signal);box-shadow:0 0 0 3px rgba(14,159,110,.20);
}

/* ============================================================
   Images — drop your own files into the /images folder.
   Filenames are referenced in image-prompts.md
   ============================================================ */
.img{
  display:block;width:100%;height:auto;
  background:var(--sheet-2);
  border:1px solid var(--rule);border-radius:var(--r);
  aspect-ratio:4/3;object-fit:cover;
}
.img--wide{aspect-ratio:16/6}
.img--wide-lo{aspect-ratio:1200/450}
.img--sq{aspect-ratio:1/1}
.on-dark .img{border-color:rgba(255,255,255,.18)}

/* ============================================================
   Top bar
   ============================================================ */
.topbar{
  position:sticky;top:0;z-index:60;
  background:rgba(238,241,244,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule);
}
.topbar__inner{display:flex;align-items:center;gap:24px;min-height:70px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;margin-right:auto}
.brand__plate{
  display:grid;place-items:center;width:38px;height:38px;border-radius:var(--r);
  background:var(--graphite);color:#fff;font-family:var(--display);font-weight:900;
  font-size:13px;letter-spacing:.02em;position:relative;
}
.brand__plate::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:9px;height:9px;
  border-radius:50%;background:var(--signal);border:2px solid var(--sheet);
}
.brand__txt b{display:block;font-family:var(--display);font-weight:800;font-size:16.5px;letter-spacing:-.02em;line-height:1.2}
.brand__txt span{font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--graphite-52)}

.nav{display:flex;gap:24px}
.nav a{
  font-family:var(--body);font-size:14.5px;font-weight:500;text-decoration:none;
  color:var(--graphite-72);padding:6px 0;transition:color .18s;
}
.nav a:hover,.nav a:focus-visible{color:var(--signal-dk)}

.hotline{display:flex;align-items:center;gap:11px;text-decoration:none}
.hotline__k{font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--graphite-52);display:block}
.hotline__n{font-family:var(--display);font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.hotline:hover .hotline__n{color:var(--signal-dk)}

/* ============================================================
   Hero
   ============================================================ */
.hero{padding-block:clamp(48px,6.6vw,84px) 0}
.hero__grid{
  display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:clamp(32px,5vw,60px);align-items:start;
}
.hero h1{margin-block:20px 20px}
.hero h1 mark{background:none;color:var(--signal-dk)}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  font-family:var(--body);font-size:14.5px;font-weight:600;text-decoration:none;
  padding:14px 24px;border-radius:var(--r);display:inline-flex;align-items:center;gap:9px;
  transition:background .18s,color .18s,border-color .18s,transform .18s;
}
.btn--solid{background:var(--graphite);color:#fff}
.btn--solid:hover{background:#0F1E29;transform:translateY(-2px)}
.btn--line{border:1px solid var(--rule);background:var(--sheet-2);color:var(--graphite)}
.btn--line:hover{border-color:var(--signal);color:var(--signal-dk);transform:translateY(-2px)}

.hero__note{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--graphite-52);
  margin-top:22px;padding-top:16px;border-top:1px dashed var(--rule);max-width:46ch;
}

/* SIGNATURE — diagnostic panel ------------------------------- */
.diag{
  background:var(--sheet-2);border:1px solid var(--graphite);border-radius:var(--r);
  box-shadow:6px 6px 0 rgba(31,45,58,.10);overflow:hidden;
}
.diag__bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--graphite);color:#fff;padding:11px 15px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
}
.diag__leds{display:flex;gap:6px}
.diag__leds i{width:8px;height:8px;border-radius:50%;display:block;opacity:.85}
.diag__leds i:nth-child(1){background:var(--signal)}
.diag__leds i:nth-child(2){background:var(--copper)}
.diag__leds i:nth-child(3){background:rgba(255,255,255,.35)}
.diag__head{padding:18px 18px 4px}
.diag__title{font-family:var(--display);font-weight:800;font-size:21px;letter-spacing:-.02em}
.diag__sub{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--graphite-52);margin-top:5px}
.rows{padding:14px 18px 6px}
.row{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:13px;
  padding:11px 0;border-bottom:1px dashed var(--rule);
}
.row:last-child{border-bottom:0}
.row__led{width:9px;height:9px;border-radius:50%;background:var(--signal);box-shadow:0 0 0 3px rgba(14,159,110,.18)}
.row--warn .row__led{background:var(--copper);box-shadow:0 0 0 3px rgba(194,98,46,.18)}
.row__txt b{display:block;font-size:14.5px;font-weight:600;line-height:1.3}
.row__txt span{font-family:var(--mono);font-size:11px;color:var(--graphite-52);letter-spacing:.04em}
.row__code{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--graphite-52);white-space:nowrap}
.diag__foot{
  background:rgba(14,159,110,.08);border-top:1px solid var(--rule);
  padding:13px 18px;font-family:var(--mono);font-size:11px;letter-spacing:.05em;
  color:var(--signal-dk);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}

.hero__shot{margin-top:clamp(40px,5.5vw,66px)}

/* ============================================================
   Capability strip
   ============================================================ */
.strip{background:var(--slate);color:#fff}
.strip__inner{display:grid;grid-template-columns:repeat(4,1fr)}
.strip__i{padding:19px 20px;border-right:1px solid rgba(255,255,255,.16);font-size:14.5px}
.strip__i:last-child{border-right:0}
.strip__i span{
  display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:#5FE3AE;margin-bottom:5px;
}

/* ============================================================
   Section heads
   ============================================================ */
.head{max-width:60ch;margin-bottom:clamp(32px,4.4vw,54px)}
.head h2{margin-block:16px 14px}
.head p{color:var(--graphite-72)}

/* ============================================================
   Appliance grid
   ============================================================ */
.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,1.8vw,20px)}
.app{
  background:var(--sheet-2);border:1px solid var(--rule);border-radius:var(--r);
  padding:20px 18px 22px;transition:border-color .2s,transform .2s,box-shadow .2s;
}
.app:hover{border-color:var(--graphite);transform:translateY(-3px);box-shadow:4px 4px 0 rgba(31,45,58,.10)}
.app__icon{width:38px;height:38px;color:var(--signal-dk);margin-bottom:14px}
.app__icon svg{width:100%;height:100%;display:block}
.app h3{margin-bottom:7px}
.app p{font-size:14px;line-height:1.55;color:var(--graphite-52)}
.app__ref{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--graphite-52);display:block;margin-top:12px}

.exclude{
  margin-top:26px;padding:16px 18px;border:1px dashed var(--rule);border-radius:var(--r);
  background:rgba(194,98,46,.06);font-size:14.5px;color:var(--graphite-72);
  display:flex;gap:13px;align-items:flex-start;
}
.exclude b{color:var(--copper);font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;white-space:nowrap;padding-top:3px}

/* ============================================================
   Fault table
   ============================================================ */
.faults{background:var(--slate);color:#fff}
.faults .head p{color:rgba(255,255,255,.72)}
.faults .ref{color:#5FE3AE}
.faults .ref::before{background:#5FE3AE;box-shadow:0 0 0 3px rgba(95,227,174,.20)}
.ftable{border-top:1px solid rgba(255,255,255,.22)}
.frow{
  display:grid;grid-template-columns:26px minmax(0,1fr) minmax(0,1.25fr) auto;
  gap:18px;align-items:baseline;padding:17px 0;
  border-bottom:1px solid rgba(255,255,255,.14);
  transition:background .2s;
}
.frow:hover{background:rgba(255,255,255,.04)}
.frow__n{font-family:var(--mono);font-size:11px;color:#5FE3AE}
.frow__sym{font-family:var(--display);font-weight:700;font-size:16.5px;letter-spacing:-.01em}
.frow__cause{font-size:15px;color:rgba(255,255,255,.72);line-height:1.55}
.frow__unit{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.5);white-space:nowrap}
.fnote{
  margin-top:24px;font-family:var(--mono);font-size:11.5px;letter-spacing:.05em;
  color:rgba(255,255,255,.55);
}

/* ============================================================
   Callout sequence — horizontal rail
   ============================================================ */
.rail{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:clamp(16px,2vw,24px);padding-top:34px}
.rail::before{
  content:"";position:absolute;top:11px;left:12px;right:12px;height:1px;
  background:repeating-linear-gradient(90deg,var(--rule) 0 7px,transparent 7px 14px);
}
.stop{position:relative}
.stop::before{
  content:"";position:absolute;top:-29px;left:0;width:23px;height:23px;border-radius:50%;
  background:var(--sheet);border:1.5px solid var(--graphite);
  display:block;
}
.stop::after{
  content:"";position:absolute;top:-23px;left:6px;width:11px;height:11px;border-radius:50%;
  background:var(--signal);
}
.stop__n{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--graphite-52);display:block;margin-bottom:9px}
.stop h3{margin-bottom:8px}
.stop p{font-size:14.5px;line-height:1.55;color:var(--graphite-72)}

/* ============================================================
   Parts & terms
   ============================================================ */
.terms{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:clamp(32px,5vw,64px);align-items:start}
.spec{border-top:1px solid var(--graphite)}
.spec__r{display:grid;grid-template-columns:166px 1fr;gap:20px;padding:15px 0;border-bottom:1px solid var(--rule-soft)}
.spec__k{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--signal-dk);padding-top:5px}
.spec__v{font-size:15.5px;line-height:1.6;color:var(--graphite-72)}
.spec__v strong{color:var(--graphite);font-weight:600}
.who{list-style:none;margin:18px 0 0;padding:0}
.who li{padding:12px 0 12px 26px;border-bottom:1px solid var(--rule-soft);font-size:15.5px;color:var(--graphite-72);position:relative}
.who li::before{
  content:"";position:absolute;left:0;top:22px;width:12px;height:12px;border-radius:2px;
  border:1.5px solid var(--signal);
}

/* ============================================================
   Work gallery
   ============================================================ */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,2vw,22px)}
.gal figure{margin:0}
.gal figcaption{
  font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--graphite-52);margin-top:11px;
}
.gal figcaption b{color:var(--graphite-72);font-weight:500}

/* ============================================================
   Contact
   ============================================================ */
.contact{background:var(--sheet-2);border-top:1px solid var(--rule)}
.contact__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(32px,5vw,64px);align-items:start}
.det{padding:17px 0;border-bottom:1px solid var(--rule-soft)}
.det:first-of-type{border-top:1px solid var(--graphite);margin-top:26px}
.det__k{font-family:var(--mono);font-size:10px;letter-spacing:.17em;text-transform:uppercase;color:var(--graphite-52)}
.det__v{font-family:var(--display);font-weight:800;font-size:clamp(20px,2.2vw,26px);letter-spacing:-.02em;margin-top:7px;word-break:break-word}
.det__v a{text-decoration:none;border-bottom:2px solid var(--signal)}
.det__v a:hover{color:var(--signal-dk)}
.det address{font-style:normal;font-family:var(--body);font-size:16.5px;line-height:1.6;color:var(--graphite-72);margin-top:8px}

.form{background:var(--sheet);border:1px solid var(--graphite);border-radius:var(--r);padding:clamp(22px,3.2vw,32px);box-shadow:6px 6px 0 rgba(31,45,58,.10)}
.form h3{margin-bottom:6px}
.form>p{font-size:14.5px;color:var(--graphite-52);margin-bottom:22px}
.field{margin-bottom:15px}
.field label{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--graphite-52);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--body);font-size:15.5px;color:var(--graphite);
  background:var(--sheet-2);border:1px solid var(--rule);border-radius:var(--r);
  padding:12px 13px;transition:border-color .18s,box-shadow .18s;
}
.field textarea{min-height:106px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:rgba(31,45,58,.34)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--signal);box-shadow:0 0 0 3px rgba(14,159,110,.20);
}
.form button{
  font-family:var(--body);font-size:14.5px;font-weight:600;background:var(--signal);color:#fff;
  border:0;border-radius:var(--r);padding:14px 28px;cursor:pointer;
  transition:background .18s,transform .18s;
}
.form button:hover{background:var(--signal-dk);transform:translateY(-2px)}

/* ============================================================
   Footer
   ============================================================ */
.foot{background:var(--graphite);color:rgba(255,255,255,.62)}
.foot__inner{padding-block:44px 34px}
.foot__top{display:flex;flex-wrap:wrap;gap:22px;justify-content:space-between;align-items:flex-end;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.16)}
.foot__name{font-family:var(--display);font-weight:900;font-size:clamp(24px,3.5vw,40px);color:#fff;letter-spacing:-.03em}
.foot__name span{color:#5FE3AE}
.foot__links{display:flex;flex-wrap:wrap;gap:20px;font-size:14px}
.foot__links a{text-decoration:none;transition:color .18s}
.foot__links a:hover{color:#5FE3AE}
.foot__bot{display:flex;flex-wrap:wrap;gap:11px 30px;justify-content:space-between;padding-top:20px;font-family:var(--mono);font-size:11px;letter-spacing:.05em}

/* ============================================================
   Motion + focus
   ============================================================ */
a:focus-visible,button:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.up{animation:up .6s cubic-bezier(.22,.68,.34,1) both}
.up--2{animation-delay:.09s}
.up--3{animation-delay:.18s}
@keyframes up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto}}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1040px){
  .apps{grid-template-columns:repeat(2,1fr)}
  .gal{grid-template-columns:repeat(2,1fr)}
  .rail{grid-template-columns:repeat(2,1fr);row-gap:34px}
  .rail::before{display:none}
  .stop{padding-top:30px}
  .stop::before{top:0}
  .stop::after{top:6px}
}
@media (max-width:900px){
  .nav{display:none}
  .hero__grid,.terms,.contact__grid{grid-template-columns:1fr}
  .strip__inner{grid-template-columns:repeat(2,1fr)}
  .strip__i{border-bottom:1px solid rgba(255,255,255,.16)}
  .strip__i:nth-child(2){border-right:0}
  .frow{grid-template-columns:22px 1fr;row-gap:5px}
  .frow__cause{grid-column:2}
  .frow__unit{grid-column:2}
}
@media (max-width:620px){
  body{font-size:16px}
  .apps,.gal,.rail{grid-template-columns:1fr}
  .strip__inner{grid-template-columns:1fr}
  .strip__i{border-right:0}
  .spec__r{grid-template-columns:1fr;gap:4px}
  .img--wide{aspect-ratio:16/10}
  .diag__foot{flex-direction:column;gap:7px}
  .row{grid-template-columns:auto 1fr;row-gap:4px}
  .row__code{grid-column:2}
  .foot__top{align-items:flex-start}
  .exclude{flex-direction:column;gap:8px}
}