/* =========================================================
   TDT Consultants Pte. Ltd. — Stylesheet
   Theme: Deep navy + structural steel + safety amber
   ========================================================= */
:root {
  --navy-950: #050d18;
  --navy-900: #07111f;
  --navy-800: #0c1c31;
  --navy-700: #13294a;
  --steel-500: #6f86a3;
  --steel-300: #a9b9cc;
  --concrete: #f2f4f7;
  --concrete-2: #e6eaf0;
  --white: #ffffff;
  --ink: #0d1726;
  --muted: #5b6b80;
  --amber: #f5a623;
  --amber-600: #e08c06;
  --amber-glow: rgba(245, 166, 35, .35);

  --font-head: "Sora", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;

  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 20px 50px -20px rgba(7, 17, 31, .35);
  --ease: cubic-bezier(.22, .8, .2, 1);
  --header-h: 84px;
  --slide-ms: 7000ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { font-family: var(--font-head); line-height: 1.15; margin: 0; letter-spacing: -.02em; }
p { margin: 0 0 1rem; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
::selection { background: var(--amber); color: var(--navy-900); }

.container { width: min(1240px, 100% - 48px); margin-inline: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .95rem 1.6rem; border-radius: 999px;
  font-family: var(--font-head); font-weight: 600; font-size: .95rem;
  transition: transform .35s var(--ease), background .3s, color .3s, box-shadow .35s, border-color .3s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn--amber { background: var(--amber); color: var(--navy-900); box-shadow: 0 10px 30px -10px var(--amber-glow); }
.btn--amber:hover { background: #ffb73d; transform: translateY(-2px); box-shadow: 0 16px 36px -10px var(--amber-glow); }
.btn--ghost { color: var(--white); border: 1.5px solid rgba(255,255,255,.4); backdrop-filter: blur(6px); background: rgba(255,255,255,.06); }
.btn--ghost:hover { background: var(--white); color: var(--navy-900); border-color: var(--white); }
.btn--outline { border: 1.5px solid var(--navy-900); color: var(--navy-900); }
.btn--outline:hover { background: var(--navy-900); color: var(--white); }
.btn--block { width: 100%; justify-content: center; }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  color: var(--white);
  transition: background .4s, height .4s var(--ease), box-shadow .4s;
}
.header.is-scrolled {
  --header-h: 70px;
  background: rgba(7, 17, 31, .86);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 10px 30px -15px rgba(0,0,0,.5);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 2rem; }

.logo { display: inline-flex; align-items: center; gap: .75rem; color: var(--white); }
.logo__mark { width: 44px; height: 44px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__text strong { font-family: var(--font-head); font-size: 1.45rem; font-weight: 800; letter-spacing: .06em; }
.logo__text small { font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; opacity: .75; margin-top: 4px; }

.nav { display: flex; align-items: center; gap: 2rem; }
.nav > a:not(.btn) { font-family: var(--font-head); font-size: 1.06rem; font-weight: 700; letter-spacing: .01em; opacity: .92; position: relative; padding: .4rem 0; }
.nav__cta { font-size: 1rem; font-weight: 700; }
.nav > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: var(--amber); transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease);
}
.nav > a:not(.btn):hover { opacity: 1; }
.nav > a:not(.btn):hover::after, .nav > a.is-current::after { transform: scaleX(1); transform-origin: left; }
.nav__cta { padding: .75rem 1.3rem; }

.burger { display: none; width: 44px; height: 44px; position: relative; }
.burger span { position: absolute; left: 10px; right: 10px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .35s var(--ease), opacity .2s; }
.burger span:nth-child(1) { top: 15px; } .burger span:nth-child(2) { top: 21px; } .burger span:nth-child(3) { top: 27px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* =========================================================
   HERO SLIDER
   ========================================================= */
.hero {
  position: relative; height: 100vh; height: 100svh; min-height: 640px;
  overflow: hidden; background: var(--navy-950); color: var(--white);
  isolation: isolate;
}
.hero__slides { position: absolute; inset: 0; }

.slide {
  position: absolute; inset: 0;
  display: flex; align-items: center;
  visibility: hidden;
  clip-path: inset(0 0 0 100%);
  z-index: 1;
}
.slide.is-active {
  visibility: visible; z-index: 3;
  clip-path: inset(0 0 0 0);
  transition: clip-path 1.4s cubic-bezier(.77, 0, .18, 1);
}
.slide.is-active.from-left { animation: none; }
.slide.is-leaving { visibility: visible; z-index: 2; clip-path: inset(0 0 0 0); }

.slide__media {
  position: absolute; inset: -2%;
  background-size: cover; background-position: center;
  transform: scale(1.18);
  will-change: transform;
}
.slide.is-active .slide__media { animation: kenburns calc(var(--slide-ms) + 2200ms) linear forwards; }
.slide.is-leaving .slide__media { transform: scale(1.04) translateX(-4%); transition: transform 1.4s cubic-bezier(.77,0,.18,1); }
.slide:nth-child(even).is-active .slide__media { animation-name: kenburns-alt; }

@keyframes kenburns {
  from { transform: scale(1.18) translate3d(2%, 0, 0); }
  to   { transform: scale(1.02) translate3d(0, 0, 0); }
}
@keyframes kenburns-alt {
  from { transform: scale(1.18) translate3d(-2%, 1%, 0); }
  to   { transform: scale(1.03) translate3d(0, 0, 0); }
}

/* overlay gradient */
.slide::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(90deg, rgba(5,13,24,.92) 0%, rgba(5,13,24,.72) 38%, rgba(5,13,24,.25) 70%, rgba(5,13,24,.35) 100%),
    linear-gradient(0deg, rgba(5,13,24,.85) 0%, rgba(5,13,24,0) 35%);
}

/* lighter overlay on the inspection slide so the engineer and cracked column stay visible */
.slide[data-index="2"]::after {
  background:
    linear-gradient(90deg, rgba(5,13,24,.82) 0%, rgba(5,13,24,.5) 40%, rgba(5,13,24,.1) 70%, rgba(5,13,24,.2) 100%),
    linear-gradient(0deg, rgba(5,13,24,.8) 0%, rgba(5,13,24,0) 30%);
}
.slide[data-index="2"] .slide__title, .slide[data-index="2"] .slide__text { text-shadow: 0 2px 18px rgba(5,13,24,.55); }

.hero__grid {
  position: absolute; inset: 0; z-index: 4; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(90deg, #000 0%, transparent 60%);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 60%);
}

.slide__content { position: relative; z-index: 5; padding-top: 40px; padding-bottom: 120px; }
/* desktop: keep every line of slide text inside the left half of the screen */
@media (min-width: 961px) {
  .hero .slide__content > * {
    max-width: calc(50vw - max(24px, (100vw - 1240px) / 2) - 24px);
  }
  .hero .slide__title { font-size: clamp(2.3rem, 3.9vw, 4.2rem); }
}
.eyebrow {
  display: inline-flex; align-items: center; gap: .9rem;
  font-family: var(--font-head); font-size: .82rem; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase; color: var(--amber);
  margin-bottom: 1.4rem;
}
.eyebrow__line { width: 46px; height: 2px; background: var(--amber); display: inline-block; }

.slide__title {
  font-size: clamp(2.5rem, 6.2vw, 5.4rem);
  font-weight: 800; line-height: 1.02; letter-spacing: -.035em;
  max-width: 15ch; margin-bottom: 1.6rem;
}
.slide__title span { display: block; overflow: hidden; padding-bottom: .06em; }
.slide__title em { font-style: normal; color: transparent; -webkit-text-stroke: 1.5px var(--white); background: linear-gradient(90deg, var(--amber), #ffd27a); -webkit-background-clip: text; background-clip: text; -webkit-text-stroke: 0; }
.slide__text { font-size: clamp(1rem, 1.3vw, 1.18rem); max-width: 520px; color: rgba(255,255,255,.82); margin-bottom: 2.2rem; }
.slide__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* text reveal choreography */
.slide .eyebrow, .slide__text, .slide__actions { opacity: 0; transform: translateY(30px); }
.slide__title span > * , .slide__title span { }
.slide__title span { opacity: 0; transform: translateY(105%); }
.slide.is-active .eyebrow     { animation: rise .9s var(--ease) .55s forwards; }
.slide.is-active .slide__title span:nth-child(1) { animation: rise 1s var(--ease) .7s forwards; }
.slide.is-active .slide__title span:nth-child(2) { animation: rise 1s var(--ease) .85s forwards; }
.slide.is-active .slide__text  { animation: rise .9s var(--ease) 1.05s forwards; }
.slide.is-active .slide__actions { animation: rise .9s var(--ease) 1.2s forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* arrows */
.hero__arrows { position: absolute; right: max(24px, calc((100vw - 1240px) / 2)); top: 50%; transform: translateY(-50%); z-index: 10; display: flex; flex-direction: column; gap: .8rem; }
.arrow {
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1.5px solid rgba(255,255,255,.35); background: rgba(255,255,255,.06);
  backdrop-filter: blur(8px);
  transition: background .3s, border-color .3s, transform .3s var(--ease);
}
.arrow svg { width: 22px; height: 22px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.arrow:hover { background: var(--amber); border-color: var(--amber); transform: scale(1.06); }
.arrow:hover svg { stroke: var(--navy-900); }

/* tabs */
.hero__tabs {
  position: absolute; left: 0; right: 0; bottom: 34px; z-index: 10;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem;
}
.tab { text-align: left; color: rgba(255,255,255,.55); padding: .6rem 0 0; transition: color .3s; }
.tab:hover, .tab.is-active { color: var(--white); }
.tab__num { font-family: var(--font-head); font-weight: 700; font-size: .85rem; color: var(--amber); margin-right: .6rem; }
.tab__label { font-family: var(--font-head); font-size: .9rem; font-weight: 600; }
.tab__bar { display: block; height: 2px; margin-top: .8rem; background: rgba(255,255,255,.2); overflow: hidden; border-radius: 2px; }
.tab__bar i { display: block; height: 100%; width: 100%; background: var(--amber); transform: scaleX(0); transform-origin: left; }
.tab.is-done .tab__bar i { transform: scaleX(1); }
.tab.is-active .tab__bar i { animation: progress var(--slide-ms) linear forwards; }
.hero.is-paused .tab.is-active .tab__bar i,
.hero.is-hidden .tab.is-active .tab__bar i { animation-play-state: paused; }
@keyframes progress { to { transform: scaleX(1); } }

.hero__counter {
  position: absolute; z-index: 10; right: max(24px, calc((100vw - 1240px) / 2)); top: calc(50% + 90px);
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  font-family: var(--font-head); font-size: .85rem; color: rgba(255,255,255,.6);
}
.hero__counter #curNum { color: var(--white); font-weight: 700; font-size: 1.15rem; }
.hero__counter i { width: 1px; height: 40px; background: rgba(255,255,255,.35); }

.hero__scroll { display: none; }

/* ---------- Marquee ---------- */
.marquee { background: var(--amber); color: var(--navy-900); overflow: hidden; padding: 1.05rem 0; }
.marquee__track { display: flex; gap: 2.2rem; width: max-content; animation: marquee 38s linear infinite; align-items: center; }
.marquee span { font-family: var(--font-head); font-weight: 700; font-size: 1.05rem; text-transform: uppercase; letter-spacing: .08em; }
.marquee b { font-size: .7rem; opacity: .6; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.section { padding: clamp(80px, 11vw, 140px) 0; position: relative; }
.section__head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 70px); }
.section__head--row { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.section__sub { color: var(--muted); font-size: 1.08rem; margin-top: 1.2rem; }
.kicker {
  font-family: var(--font-head); font-size: .8rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase;
  color: var(--amber-600); display: inline-flex; align-items: center; gap: .7rem; margin-bottom: 1.1rem;
}
.kicker::before { content: ""; width: 28px; height: 2px; background: currentColor; }
.kicker--light { color: var(--amber); }
.h2 { font-size: clamp(2rem, 4.2vw, 3.3rem); font-weight: 700; color: var(--navy-900); }
.h2--light { color: var(--white); }
.hl { color: var(--amber-600); }
.h2--light .hl { color: var(--amber); }
.lead { font-size: 1.15rem; color: var(--ink); margin: 1.5rem 0 1rem; }
.lead--light { color: rgba(255,255,255,.8); }

/* ---------- About ---------- */
.about__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(40px, 7vw, 100px); align-items: center; }
.about__media { position: relative; padding: 0 12% 18% 0; }
.about__img { border-radius: var(--radius-lg); object-fit: cover; box-shadow: var(--shadow); }
.about__img--main { width: 100%; aspect-ratio: 4/3.4; }
.about__img--sub { position: absolute; right: 0; bottom: 0; width: 48%; aspect-ratio: 1; border: 8px solid var(--white); }
.about__badge {
  position: absolute; left: -18px; bottom: 9%;
  background: var(--navy-900); color: var(--white); border-radius: var(--radius);
  padding: 1.2rem 1.5rem; box-shadow: var(--shadow); text-align: center;
  border-bottom: 4px solid var(--amber);
}
.about__badge strong { display: block; font-size: .75rem; text-transform: uppercase; letter-spacing: .2em; color: var(--amber); }
.about__badge span { display: block; font-family: var(--font-head); font-weight: 800; font-size: 2.3rem; line-height: 1.1; }
.about__badge small { font-size: .75rem; opacity: .7; letter-spacing: .1em; text-transform: uppercase; }
.about__copy > p { color: var(--muted); }
.about__copy .lead { color: var(--ink); }

.checks { display: grid; gap: .8rem; margin: 1.8rem 0 2rem; }
.checks li { position: relative; padding-left: 2.1rem; font-weight: 500; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: .2em; width: 1.35rem; height: 1.35rem; border-radius: 50%;
  background: var(--amber) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2307111f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/62% no-repeat;
}
.company-card {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 1px; background: var(--concrete-2);
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--concrete-2);
}
.company-card > div { background: var(--concrete); padding: 1rem 1.3rem; }
.company-card small { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .14em; color: var(--muted); }
.company-card strong { font-family: var(--font-head); font-size: 1.02rem; color: var(--navy-900); }

/* ---------- Stats ---------- */
.stats { background: var(--navy-900); color: var(--white); padding: 64px 0; position: relative; overflow: hidden; }
.stats::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.stats__grid { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 0 1.5rem; border-left: 1px solid rgba(255,255,255,.12); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat strong { display: block; font-family: var(--font-head); font-size: clamp(2.2rem, 4vw, 3.4rem); font-weight: 800; color: var(--amber); line-height: 1.1; }
.stat span { color: var(--steel-300); font-size: .95rem; }

/* ---------- Services ---------- */
.services { background: var(--concrete); }
.services__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; }
.svc {
  background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: 0 1px 0 var(--concrete-2); display: flex; flex-direction: column;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.svc:hover { transform: translateY(-10px); box-shadow: var(--shadow); }
.svc__img { aspect-ratio: 4/3; overflow: hidden; position: relative; }
.svc__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.svc:hover .svc__img img { transform: scale(1.08); }
.svc__img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,17,31,.45), transparent 55%); }
.svc__body { padding: 1.7rem 1.6rem 2rem; position: relative; flex: 1; }
.svc__num {
  position: absolute; top: -28px; right: 1.4rem;
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--amber); color: var(--navy-900); font-family: var(--font-head); font-weight: 800;
  box-shadow: 0 10px 24px -8px var(--amber-glow); z-index: 2;
}
.svc h3 { font-size: 1.3rem; margin-bottom: .7rem; color: var(--navy-900); }
.svc p { color: var(--muted); font-size: .95rem; }
.svc ul { display: grid; gap: .45rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--concrete-2); }
.svc li { font-size: .9rem; padding-left: 1.2rem; position: relative; }
.svc li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 7px; background: var(--amber); transform: rotate(45deg); }

/* ---------- Inspections ---------- */
.inspect { background: var(--navy-900); color: var(--white); overflow: hidden; }
.inspect__bg {
  position: absolute; inset: 0; opacity: .18;
  background: url("../assets/images/svc-foundation.jpg") center/cover fixed;
}
.inspect::after { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 15% 20%, rgba(245,166,35,.16), transparent 50%); pointer-events: none; }
.inspect__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(40px, 6vw, 90px); align-items: center; }
.inspect__list { display: grid; gap: 1rem; }
.icard {
  display: flex; gap: 1.2rem; align-items: flex-start;
  padding: 1.35rem 1.5rem; border-radius: var(--radius);
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  backdrop-filter: blur(10px);
  transition: background .35s, transform .45s var(--ease), border-color .35s;
}
.icard:hover { background: rgba(255,255,255,.09); border-color: rgba(245,166,35,.5); transform: translateX(8px); }
.icard__icon { flex: none; width: 48px; height: 48px; border-radius: 12px; background: rgba(245,166,35,.14); display: grid; place-items: center; }
.icard__icon svg, .feat__icon svg { width: 24px; height: 24px; fill: none; stroke: var(--amber); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icard h4 { font-size: 1.05rem; margin-bottom: .25rem; }
.icard p { margin: 0; color: var(--steel-300); font-size: .93rem; }

/* ---------- Process ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; counter-reset: s; position: relative; }
.steps::before { content: ""; position: absolute; top: 34px; left: 34px; right: 10%; height: 2px; background: repeating-linear-gradient(90deg, var(--concrete-2) 0 10px, transparent 10px 18px); }
.step { position: relative; }
.step__n {
  width: 68px; height: 68px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--font-head); font-weight: 800; font-size: 1.2rem;
  background: var(--white); color: var(--navy-900); border: 2px solid var(--concrete-2);
  margin-bottom: 1.6rem; position: relative; z-index: 1;
  transition: background .4s, color .4s, border-color .4s, transform .4s var(--ease);
}
.step:hover .step__n { background: var(--amber); border-color: var(--amber); transform: scale(1.08); }
.step h4 { font-size: 1.2rem; margin-bottom: .6rem; color: var(--navy-900); }
.step p { color: var(--muted); font-size: .96rem; }

/* ---------- Projects ---------- */
.projects { background: var(--concrete); }
.gallery { display: grid; grid-template-columns: 1.2fr 1fr 1fr; grid-auto-rows: 280px; gap: 1.2rem; }
.tile { margin: 0; position: relative; overflow: hidden; border-radius: var(--radius-lg); cursor: pointer; }
.tile--tall { grid-row: span 2; }
.tile img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.tile::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5,13,24,.88) 0%, rgba(5,13,24,.1) 55%); transition: opacity .5s; }
.tile:hover img { transform: scale(1.08); }
.tile figcaption { position: absolute; left: 1.5rem; right: 1.5rem; bottom: 1.4rem; z-index: 2; color: var(--white); transition: transform .5s var(--ease); }
.tile figcaption small { display: block; font-size: .74rem; text-transform: uppercase; letter-spacing: .18em; color: var(--amber); font-weight: 600; margin-bottom: .3rem; }
.tile figcaption strong { font-family: var(--font-head); font-size: 1.3rem; }
.tile:hover figcaption { transform: translateY(-6px); }

/* ---------- Why ---------- */
.why__grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(40px, 6vw, 90px); align-items: start; }
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.3rem; }
.feat {
  padding: 2rem 1.7rem; border-radius: var(--radius-lg); border: 1px solid var(--concrete-2);
  transition: border-color .4s, box-shadow .4s, transform .4s var(--ease);
  background: var(--white);
}
.feat:hover { border-color: transparent; box-shadow: var(--shadow); transform: translateY(-6px); }
.feat__icon { width: 54px; height: 54px; border-radius: 14px; background: var(--navy-900); display: grid; place-items: center; margin-bottom: 1.3rem; }
.feat h4 { font-size: 1.15rem; margin-bottom: .5rem; color: var(--navy-900); }
.feat p { color: var(--muted); font-size: .95rem; margin: 0; }

/* ---------- CTA ---------- */
.cta { position: relative; padding: clamp(90px, 12vw, 150px) 0; color: var(--white); overflow: hidden; text-align: center; }
.cta__bg { position: absolute; inset: 0; background: url("../assets/images/singapore.jpg") center/cover fixed; }
.cta::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(135deg, rgba(7,17,31,.92), rgba(19,41,74,.78)); }
.cta__inner { position: relative; z-index: 2; max-width: 820px; }
.cta h2 { font-size: clamp(2rem, 4.4vw, 3.4rem); font-weight: 700; margin-bottom: 1.2rem; }
.cta p { color: rgba(255,255,255,.8); font-size: 1.1rem; margin-bottom: 2.2rem; }
.cta__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(40px, 6vw, 90px); align-items: start; }
.contact__info > p { color: var(--muted); margin: 1.2rem 0 2rem; }
.info { display: flex; gap: 1.1rem; align-items: center; padding: 1.1rem 0; border-bottom: 1px solid var(--concrete-2); }
.info__icon { width: 50px; height: 50px; flex: none; border-radius: 12px; background: var(--concrete); display: grid; place-items: center; }
.info__icon svg { width: 22px; height: 22px; fill: none; stroke: var(--amber-600); stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.info small { display: block; font-size: .74rem; text-transform: uppercase; letter-spacing: .14em; color: var(--muted); }
.info strong { font-weight: 600; color: var(--navy-900); }
.info a:hover { color: var(--amber-600); }

.form {
  background: var(--navy-900); color: var(--white); padding: clamp(28px, 4vw, 48px);
  border-radius: var(--radius-lg); box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.form::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--amber), #ffd27a); }
.form h3 { font-size: 1.5rem; margin-bottom: 1.6rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: block; margin-bottom: 1rem; }
.field span { display: block; font-size: .82rem; color: var(--steel-300); margin-bottom: .4rem; font-weight: 500; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; color: var(--white);
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  border-radius: 10px; padding: .85rem 1rem; outline: none;
  transition: border-color .3s, background .3s, box-shadow .3s;
}
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a9b9cc' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; background-size: 18px; }
.field select option { color: var(--ink); }
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--amber); background: rgba(255,255,255,.09); box-shadow: 0 0 0 4px rgba(245,166,35,.15); }
.field.is-invalid input, .field.is-invalid select, .field.is-invalid textarea { border-color: #ff6b6b; }
.form__note { margin: 1rem 0 0; font-size: .92rem; min-height: 1.4em; color: var(--amber); }

/* ---------- Footer ---------- */
.footer { background: var(--navy-950); color: var(--steel-300); padding: 80px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 60px; }
.footer__brand p { margin-top: 1.3rem; max-width: 330px; font-size: .95rem; }
.footer__uen { font-family: var(--font-head); font-weight: 600; color: var(--white); letter-spacing: .05em; }
.footer h5 { color: var(--white); font-size: 1rem; margin-bottom: 1.2rem; }
.footer__grid > div:not(.footer__brand) { display: flex; flex-direction: column; gap: .7rem; font-size: .95rem; }
.footer__grid a:hover { color: var(--amber); }
.footer__bottom { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 26px 0; border-top: 1px solid rgba(255,255,255,.08); font-size: .88rem; }
.totop:hover { color: var(--amber); }

/* ---------- WhatsApp floating button ---------- */
.whatsapp {
  position: fixed; right: 24px; bottom: 24px; z-index: 150;
  width: 60px; height: 60px; border-radius: 50%;
  display: grid; place-items: center;
  background: #25d366; color: #fff;
  box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .6), 0 4px 12px rgba(0,0,0,.2);
  transition: transform .35s var(--ease), box-shadow .35s;
}
.whatsapp svg { width: 32px; height: 32px; }
.whatsapp::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: #25d366; z-index: -1; animation: wa-pulse 2.4s ease-out infinite;
}
.whatsapp:hover { transform: scale(1.08); box-shadow: 0 16px 34px -8px rgba(37, 211, 102, .75), 0 4px 12px rgba(0,0,0,.25); }
.whatsapp__tip {
  position: absolute; right: calc(100% + 12px); top: 50%; transform: translate(8px, -50%);
  background: var(--navy-900); color: #fff; font-family: var(--font-head); font-size: .85rem; font-weight: 600;
  padding: .5rem .9rem; border-radius: 8px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s var(--ease);
}
.whatsapp:hover .whatsapp__tip { opacity: 1; transform: translate(0, -50%); }
@keyframes wa-pulse { 0% { transform: scale(1); opacity: .55; } 100% { transform: scale(1.6); opacity: 0; } }
@media (max-width: 640px) {
  .whatsapp { right: 16px; bottom: 16px; width: 54px; height: 54px; }
  .whatsapp svg { width: 28px; height: 28px; }
  .whatsapp__tip { display: none; }
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1100px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .nav { gap: 1.1rem; }
  .nav > a:not(.btn) { font-size: .98rem; }
}

@media (max-width: 960px) {
  .burger { display: block; z-index: 2; }
  .nav {
    position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: 1.6rem;
    background: rgba(5,13,24,.97); backdrop-filter: blur(16px);
    opacity: 0; visibility: hidden; transition: opacity .4s, visibility .4s;
  }
  .nav > a:not(.btn) { font-family: var(--font-head); font-size: 1.6rem; font-weight: 600; }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav__cta { margin-top: 1rem; }

  .about__grid, .inspect__grid, .why__grid, .contact__grid { grid-template-columns: 1fr; }
  .about__media { max-width: 620px; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 3rem; }
  .steps::before { display: none; }
  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 240px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); row-gap: 2.5rem; }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }

  .hero__arrows { top: auto; bottom: 110px; transform: none; flex-direction: row; }
  .hero__counter { display: none; }
  .hero__tabs { grid-template-columns: repeat(4, 1fr); gap: .6rem; }
  .tab__label { display: none; }
  .tab__num { margin: 0; }
  .inspect__bg, .cta__bg { background-attachment: scroll; }
}

@media (max-width: 640px) {
  :root { --header-h: 70px; }
  .container { width: calc(100% - 32px); }
  .logo__mark { width: 38px; height: 38px; }
  .logo__text strong { font-size: 1.25rem; }
  .slide__content { padding-bottom: 170px; }
  .slide__title { font-size: clamp(2.2rem, 10.5vw, 3rem); }
  .slide::after { background: linear-gradient(0deg, rgba(5,13,24,.95) 0%, rgba(5,13,24,.6) 55%, rgba(5,13,24,.45) 100%); }
  .slide__actions .btn { padding: .85rem 1.25rem; font-size: .9rem; }
  .hero__arrows { left: 16px; right: auto; bottom: 86px; }
  .arrow { width: 46px; height: 46px; }
  .hero__tabs { bottom: 26px; padding-right: 66px; }
  .services__grid, .features, .form__row, .steps { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; grid-auto-rows: 240px; }
  .tile--tall { grid-row: auto; }
  .about__media { padding: 0 0 22% 0; }
  .about__img--sub { width: 52%; }
  .about__badge { left: 10px; bottom: auto; top: 10px; padding: .9rem 1.1rem; }
  .about__badge span { font-size: 1.8rem; }
  .company-card { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 0 1rem; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}