/* ============================================================
   S1 HOME PTE. LTD.
   Direction: NIGHT SHIFT. A dark service console — charcoal
   panels, one amber signal, severity colours that only appear
   where urgency is being communicated. Persistent left rail.
   ============================================================ */
:root{
  --night:#0F1317;
  --panel:#161C22;
  --panel-2:#1D242B;
  --raised:#232C34;
  --white:#EDF1F4;
  --w-72:rgba(237,241,244,.72);
  --w-50:rgba(237,241,244,.50);
  --w-22:rgba(237,241,244,.22);
  --w-12:rgba(237,241,244,.12);
  --amber:#F2A33C;
  --amber-dk:#C97F1D;
  --stop:#E8564A;
  --today:#F2A33C;
  --week:#4DB8A8;
  --wait:#7C8B99;

  --disp:"Sora","Helvetica Neue",Arial,sans-serif;
  --body:"Lexend","Segoe UI",Helvetica,Arial,sans-serif;
  --mono:"Fira Code",ui-monospace,Consolas,monospace;

  --rail:212px;
  --wrap:1080px;
  --gutter:clamp(18px,4vw,44px);
  --band:clamp(54px,7.5vw,98px);
  --r:4px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--night);color:var(--white);
  font-family:var(--body);font-size:16.5px;line-height:1.68;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

/* layout: persistent rail + content column ------------------- */
.shell{display:grid;grid-template-columns:var(--rail) minmax(0,1fr)}
.main{min-width:0;border-left:1px solid var(--w-12)}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}
.band{padding-block:var(--band)}

/* type ------------------------------------------------------ */
h1,h2,h3{margin:0;font-family:var(--disp);font-weight:800;line-height:1.05;letter-spacing:-.03em}
h1{font-size:clamp(34px,5.2vw,62px)}
h2{font-size:clamp(26px,3.6vw,42px)}
h3{font-size:clamp(16.5px,1.5vw,19px);font-weight:700;line-height:1.25;letter-spacing:-.02em}
p{margin:0}
.deck{font-size:clamp(16px,1.55vw,18.5px);line-height:1.62;color:var(--w-72);max-width:56ch}

.sig{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--amber);display:inline-flex;align-items:center;gap:9px;
}
.sig::before{content:"";width:6px;height:6px;background:var(--amber);display:block}

/* ============================================================
   Image placeholders — console viewport
   ============================================================ */
.ph{
  position:relative;display:grid;place-items:center;padding:26px 22px;
  background:var(--panel-2);border:1px solid var(--w-22);border-radius:var(--r);
  aspect-ratio:4/3;overflow:hidden;
}
.ph::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--amber),transparent 70%);
}
.ph::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(0deg,rgba(237,241,244,.030) 0 1px,transparent 1px 4px);
  pointer-events:none;
}
.ph__tag{
  position:relative;z-index:2;text-align:center;max-width:28ch;
  font-family:var(--mono);font-size:10.5px;line-height:1.85;letter-spacing:.02em;color:var(--w-50);
}
.ph__tag b{display:block;font-weight:500;color:var(--amber);text-transform:uppercase;letter-spacing:.14em;margin-bottom:5px}
.ph--wide{aspect-ratio:16/6}
.ph--sq{aspect-ratio:1/1}
.ph--tall{aspect-ratio:3/4}

/* ============================================================
   Left rail
   ============================================================ */
.rail{
  position:sticky;top:0;height:100vh;background:var(--panel);
  display:flex;flex-direction:column;padding:22px 20px;
}
.rail__id{text-decoration:none;display:block;margin-bottom:34px}
.rail__mark{
  width:40px;height:40px;border-radius:var(--r);background:var(--amber);color:var(--night);
  display:grid;place-items:center;font-family:var(--disp);font-weight:800;font-size:16px;margin-bottom:12px;
}
.rail__id b{display:block;font-family:var(--disp);font-weight:800;font-size:17px;letter-spacing:-.03em;line-height:1.15}
.rail__id span{font-family:var(--mono);font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--w-50)}
.rail__nav{display:flex;flex-direction:column;gap:2px}
.rail__nav a{
  font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  text-decoration:none;color:var(--w-50);padding:9px 10px;border-radius:var(--r);
  border-left:2px solid transparent;transition:color .18s,background .18s,border-color .18s;
}
.rail__nav a:hover,.rail__nav a:focus-visible{color:var(--white);background:var(--panel-2);border-left-color:var(--amber)}
.rail__foot{margin-top:auto;padding-top:22px;border-top:1px solid var(--w-12)}
.rail__k{font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--w-50);display:block;margin-bottom:6px}
.rail__tel{
  font-family:var(--disp);font-weight:800;font-size:19px;letter-spacing:-.025em;
  text-decoration:none;display:block;
}
.rail__tel:hover{color:var(--amber)}
.rail__note{font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;color:var(--w-50);margin-top:10px;line-height:1.7}

/* mobile bar (hidden on desktop) */
.mbar{display:none}

/* ============================================================
   Hero
   ============================================================ */
.hero{padding-block:clamp(38px,5vw,72px) 0;border-bottom:1px solid var(--w-12)}
.hero h1{margin-block:18px 20px}
.hero h1 span{color:var(--amber)}
.hero__acts{display:flex;flex-wrap:wrap;gap:11px;margin-top:28px}
.btn{
  font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;
  text-decoration:none;padding:14px 22px;border-radius:var(--r);display:inline-block;
  transition:background .18s,color .18s,transform .18s,border-color .18s;
}
.btn--amber{background:var(--amber);color:var(--night)}
.btn--amber:hover{background:#FFB955;transform:translateY(-2px)}
.btn--line{border:1px solid var(--w-22);color:var(--white)}
.btn--line:hover{border-color:var(--amber);color:var(--amber);transform:translateY(-2px)}
.hero__shot{margin-top:clamp(32px,4vw,52px)}

/* status bar under hero */
.status{border-top:1px solid var(--w-12);background:var(--panel)}
.status__in{display:grid;grid-template-columns:repeat(4,1fr)}
.status__i{padding:17px 18px;border-right:1px solid var(--w-12);font-size:14px}
.status__i:last-child{border-right:0}
.status__i b{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber);margin-bottom:5px;font-weight:500}

/* ============================================================
   Section head
   ============================================================ */
.sh{max-width:58ch;margin-bottom:clamp(28px,3.6vw,46px)}
.sh h2{margin-block:14px 13px}
.sh p{color:var(--w-72);font-size:16px}

/* ============================================================
   SIGNATURE — triage
   ============================================================ */
.triage{display:grid;gap:12px}
.tri{
  display:grid;grid-template-columns:6px 128px minmax(0,1fr) minmax(0,1.35fr);
  gap:clamp(12px,2vw,24px);align-items:center;
  background:var(--panel);border:1px solid var(--w-12);border-radius:var(--r);
  padding:0 20px 0 0;overflow:hidden;transition:border-color .2s,transform .2s;
}
.tri:hover{border-color:var(--w-22);transform:translateX(4px)}
.tri__bar{align-self:stretch;background:var(--c)}
.tri__lv{padding:18px 0 18px 18px}
.tri__lv b{
  display:inline-block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c);border:1px solid currentColor;border-radius:100px;padding:5px 11px;
}
.tri__lv span{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--w-50);margin-top:9px}
.tri__s h3{margin-bottom:5px}
.tri__s p{font-size:13.5px;color:var(--w-50);line-height:1.5}
.tri__a{font-size:14.5px;line-height:1.6;color:var(--w-72);padding-block:18px}
.tri__a strong{color:var(--white);font-weight:600}
.triage__foot{
  margin-top:20px;font-family:var(--mono);font-size:10.5px;letter-spacing:.04em;
  color:var(--w-50);line-height:1.8;
}

/* ============================================================
   Coverage — two column index
   ============================================================ */
.cov{display:grid;grid-template-columns:repeat(2,1fr);gap:0 clamp(24px,4vw,52px)}
.unit{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:16px;align-items:start;
  padding:17px 0;border-bottom:1px solid var(--w-12);
}
.unit__c{font-family:var(--mono);font-size:11px;letter-spacing:.09em;color:var(--amber);padding-top:3px}
.unit h3{margin-bottom:5px}
.unit p{font-size:14px;line-height:1.55;color:var(--w-50)}

.outside{
  margin-top:28px;border:1px solid var(--stop);border-radius:var(--r);
  background:rgba(232,86,74,.07);padding:20px 22px;
  display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;
}
.outside b{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--stop);border:1px solid var(--stop);border-radius:100px;padding:6px 12px;white-space:nowrap;
}
.outside p{font-size:15px;color:var(--w-72)}

/* ============================================================
   Visit timeline
   ============================================================ */
.visit{background:var(--panel);border-block:1px solid var(--w-12)}
.tl{position:relative;margin-top:14px}
.tl__track{height:2px;background:var(--w-12);position:relative;margin-bottom:30px}
.tl__fill{position:absolute;inset:0 0 0 0;background:linear-gradient(90deg,var(--amber),rgba(242,163,60,.15))}
.tl__stops{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,2.4vw,30px)}
.tstop{position:relative}
.tstop::before{
  content:"";position:absolute;top:-39px;left:0;width:12px;height:12px;border-radius:50%;
  background:var(--night);border:2px solid var(--amber);
}
.tstop__t{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--amber);display:block;margin-bottom:9px;
}
.tstop h3{margin-bottom:8px}
.tstop p{font-size:14px;line-height:1.55;color:var(--w-50)}

/* ============================================================
   Gallery
   ============================================================ */
.gal{display:grid;grid-template-columns:repeat(6,1fr);gap:clamp(12px,1.8vw,20px)}
.gal figure{margin:0}
.gal figcaption{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--w-50);margin-top:11px;
}
.gal figcaption b{color:var(--w-72);font-weight:500}
.ga{grid-column:span 3}
.gb{grid-column:span 3}
.gc{grid-column:span 2}
.gd{grid-column:span 2}
.ge{grid-column:span 2}

/* ============================================================
   Terms
   ============================================================ */
.tg{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:clamp(26px,4vw,56px);align-items:start}
.spec{border-top:1px solid var(--w-22)}
.spec__r{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:14px 0;border-bottom:1px solid var(--w-12)}
.spec__k{font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--amber);padding-top:4px}
.spec__v{font-size:15px;line-height:1.6;color:var(--w-72)}
.spec__v strong{color:var(--white);font-weight:600}
.who{list-style:none;margin:16px 0 0;padding:0}
.who li{padding:11px 0 11px 24px;border-bottom:1px solid var(--w-12);font-size:15px;color:var(--w-72);position:relative}
.who li::before{content:"";position:absolute;left:0;top:20px;width:10px;height:2px;background:var(--amber)}

/* ============================================================
   Contact
   ============================================================ */
.contact{background:var(--panel);border-top:1px solid var(--w-12)}
.cg{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(26px,4vw,56px);align-items:start}
.line{padding:16px 0;border-bottom:1px solid var(--w-12)}
.line:first-of-type{border-top:1px solid var(--amber);margin-top:24px}
.line__k{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--w-50)}
.line__v{font-family:var(--disp);font-weight:800;font-size:clamp(19px,2.2vw,26px);letter-spacing:-.03em;margin-top:7px;word-break:break-word}
.line__v a{text-decoration:none;border-bottom:2px solid var(--amber)}
.line__v a:hover{color:var(--amber)}
.line address{font-style:normal;font-family:var(--body);font-size:16px;line-height:1.6;color:var(--w-72);margin-top:8px}

.form{background:var(--panel-2);border:1px solid var(--w-22);border-radius:var(--r);padding:clamp(22px,3vw,32px)}
.form h3{margin-bottom:5px}
.form>p{font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:var(--w-50);margin-bottom:20px}
.f{margin-bottom:14px}
.f label{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--w-50);margin-bottom:7px}
.f input,.f select,.f textarea{
  width:100%;font-family:var(--body);font-size:15px;color:var(--white);
  background:var(--night);border:1px solid var(--w-22);border-radius:var(--r);padding:12px 13px;
  transition:border-color .18s,box-shadow .18s;
}
.f textarea{min-height:100px;resize:vertical}
.f select option{background:var(--night);color:var(--white)}
.f input::placeholder,.f textarea::placeholder{color:rgba(237,241,244,.30)}
.f input:focus,.f select:focus,.f textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(242,163,60,.18)}
.form button{
  font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;
  background:var(--amber);color:var(--night);border:0;border-radius:var(--r);
  padding:15px 26px;cursor:pointer;width:100%;transition:background .18s,transform .18s;
}
.form button:hover{background:#FFB955;transform:translateY(-2px)}

/* ============================================================
   Footer
   ============================================================ */
.foot{background:var(--night);border-top:1px solid var(--w-12)}
.foot__in{padding-block:38px 30px}
.foot__top{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-end;padding-bottom:22px;border-bottom:1px solid var(--w-12)}
.foot__name{font-family:var(--disp);font-weight:800;font-size:clamp(24px,3.4vw,38px);letter-spacing:-.035em;line-height:1}
.foot__name span{color:var(--amber)}
.foot__nav{display:flex;flex-wrap:wrap;gap:18px;font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase}
.foot__nav a{text-decoration:none;color:var(--w-50)}
.foot__nav a:hover{color:var(--amber)}
.foot__bot{display:flex;flex-wrap:wrap;gap:9px 26px;justify-content:space-between;padding-top:18px;font-family:var(--mono);font-size:10px;letter-spacing:.05em;color:var(--w-50)}

/* ============================================================
   Focus + motion
   ============================================================ */
a:focus-visible,button:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
.in{animation:in .6s cubic-bezier(.22,.68,.34,1) both}
.in--2{animation-delay:.08s}
.in--3{animation-delay:.16s}
@keyframes in{from{opacity:0;transform:translateY(13px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto}}

/* ============================================================
   Responsive — rail collapses to a top bar
   ============================================================ */
@media (max-width:1000px){
  .shell{grid-template-columns:1fr}
  .rail{display:none}
  .main{border-left:0}
  .mbar{
    display:block;position:sticky;top:0;z-index:70;
    background:var(--panel);border-bottom:1px solid var(--w-12);
  }
  .mbar__in{display:flex;align-items:center;gap:18px;padding-block:13px}
  .mbar__id{display:flex;align-items:center;gap:11px;text-decoration:none;margin-right:auto}
  .mbar__mark{width:34px;height:34px;border-radius:var(--r);background:var(--amber);color:var(--night);display:grid;place-items:center;font-family:var(--disp);font-weight:800;font-size:14px}
  .mbar__id b{display:block;font-family:var(--disp);font-weight:800;font-size:15.5px;letter-spacing:-.03em;line-height:1.2}
  .mbar__id span{font-family:var(--mono);font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--w-50)}
  .mbar__tel{
    font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;text-decoration:none;
    background:var(--amber);color:var(--night);padding:10px 15px;border-radius:var(--r);white-space:nowrap;
  }
  .cov{grid-template-columns:1fr}
  .tl__stops{grid-template-columns:repeat(2,1fr);row-gap:34px}
  .tstop::before{display:none}
  .tstop{border-top:1px solid var(--w-12);padding-top:16px}
  .tl__track{display:none}
  .gal{grid-template-columns:repeat(4,1fr)}
  .ga,.gb{grid-column:span 4}
  .gc,.gd,.ge{grid-column:span 2}
}
@media (max-width:820px){
  .tg,.cg{grid-template-columns:1fr}
  .status__in{grid-template-columns:repeat(2,1fr)}
  .status__i{border-bottom:1px solid var(--w-12)}
  .status__i:nth-child(2){border-right:0}
  .tri{grid-template-columns:6px minmax(0,1fr);row-gap:0;padding-right:16px}
  .tri__lv{padding-bottom:0}
  .tri__s{padding-block:12px 0}
  .tri__a{padding-block:12px 18px}
}
@media (max-width:600px){
  body{font-size:16px}
  .status__in,.tl__stops,.gal{grid-template-columns:1fr}
  .status__i{border-right:0}
  .ga,.gb,.gc,.gd,.ge{grid-column:span 1}
  .spec__r{grid-template-columns:1fr;gap:4px}
  .ph--wide{aspect-ratio:16/10}
  .outside{grid-template-columns:1fr;gap:12px}
  .foot__top{align-items:flex-start}
  .mbar__id span{display:none}
}

/* Replaceable image assets
   Put your files in: images/
   Filenames are referenced in index.html */
.site-img{width:100%;height:100%;object-fit:cover;display:block;border-radius:var(--r);aspect-ratio:4/3;background:var(--panel-2)}
.site-img--wide{aspect-ratio:16/6}
.site-img--16-9{aspect-ratio:16/9}