/* =========================================================
   RHEZ — Landing Page Styles
   Brand: RHEZ Sdn Bhd
   ========================================================= */

:root {
  /* Brand colors (spec §2) */
  --color-gold: #E1C564;
  --color-gold-soft: rgba(225, 197, 100, 0.15);
  --color-black: #000000;
  --color-night: #0A0A0A;
  --color-surface: #393939;
  --color-surface-2: #1A1A1A;
  --color-muted: #858585;
  --color-white: #FFFFFF;

  /* Typography */
  --font-display: 'Rajdhani', 'Barlow Condensed', system-ui, sans-serif;
  --font-body: 'Barlow', 'Segoe UI', system-ui, sans-serif;

  /* Layout */
  --max-w: 1280px;
  --pad-x: clamp(20px, 5vw, 64px);
  --nav-h: 72px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* =========================================================
   Reset & base
   ========================================================= */

*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--color-black);
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

ul { list-style: none; padding: 0; margin: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0;
  line-height: 1.1;
}

p { margin: 0; }

::selection { background: var(--color-gold); color: var(--color-black); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.section-head { margin-bottom: 40px; }

/* Reveal-on-scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--color-gold);
  border-radius: 2px;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-gold);
  color: var(--color-black);
}
.btn--primary:hover { background: var(--color-white); border-color: var(--color-white); }

.btn--outline {
  background: transparent;
  color: var(--color-gold);
}
.btn--outline:hover { background: var(--color-gold); color: var(--color-black); }

.btn--quote {
  background: transparent;
  color: var(--color-gold);
  padding: 10px 20px;
  font-size: 12px;
}
.btn--quote:hover { background: var(--color-gold); color: var(--color-black); }

/* =========================================================
   Nav (spec §3)
   ========================================================= */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 50;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-gold-soft);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.nav--scrolled {
  background: rgba(0, 0, 0, 0.92);
  border-bottom-color: rgba(225, 197, 100, 0.28);
}

.nav__inner {
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-gold);
}
.nav__logo {
  height: 32px;
  width: auto;
  display: block;
}
.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.32em;
  color: var(--color-white);
}

.nav__links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}
.nav__links a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-white);
  position: relative;
  transition: color 0.2s var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -8px;
  width: 0; height: 1px;
  background: var(--color-gold);
  transition: width 0.25s var(--ease);
}
.nav__links a:hover { color: var(--color-gold); }
.nav__links a:hover::after { width: 100%; }

.nav__burger {
  display: none;
  width: 36px; height: 36px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  margin-left: auto;
}
.nav__burger span {
  display: block;
  height: 2px;
  background: var(--color-white);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav--open .nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav--open .nav__burger span:nth-child(2) { opacity: 0; }
.nav--open .nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 24px var(--pad-x) 32px;
  background: rgba(0, 0, 0, 0.96);
  border-bottom: 1px solid var(--color-gold-soft);
}
.nav__mobile a {
  padding: 14px 0;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid #1f1f1f;
}
.nav__mobile .btn--quote {
  margin-top: 16px;
  align-self: flex-start;
  border-bottom: none;
}

/* =========================================================
   Hero (spec §4)
   ========================================================= */

.hero {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 64px);
  padding-bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 80% at 20% 10%, rgba(225,197,100,0.12), transparent 55%),
    radial-gradient(80% 60% at 90% 60%, rgba(40, 80, 130, 0.18), transparent 60%),
    linear-gradient(180deg, #0a0a0a 0%, #000 70%);
}
.hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/></svg>");
  opacity: 0.05;
  mix-blend-mode: overlay;
  pointer-events: none;
}

.hero__content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  width: 100%;
}
.hero__title {
  font-size: clamp(48px, 7.5vw, 88px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  max-width: 12ch;
}
.hero__sub {
  color: var(--color-muted);
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 300;
  max-width: 56ch;
  margin-bottom: 36px;
}
.hero__ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 80px; }

.hero__tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-gold-soft);
  border-top: 1px solid var(--color-gold-soft);
}

.tile {
  position: relative;
  aspect-ratio: 4 / 3;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  overflow: hidden;
  color: var(--color-white);
  transition: transform 0.4s var(--ease), filter 0.4s var(--ease);
}
.tile::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.85) 100%);
  pointer-events: none;
  z-index: 1;
}
.tile > * { position: relative; z-index: 2; }
.tile:hover { filter: brightness(1.15); }
.tile:hover .tile__label { color: var(--color-gold); }

.tile__num {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 0.2em;
}
.tile__label {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.25s var(--ease);
}

.tile--cctv  { background: radial-gradient(120% 100% at 30% 30%, #1a3a5c 0%, #050b14 70%); }
.tile--alarm { background: radial-gradient(120% 100% at 70% 30%, #3a1414 0%, #0a0303 70%); }
.tile--access{ background: radial-gradient(120% 100% at 30% 70%, #4a3a14 0%, #0a0703 70%); }
.tile--cyber { background: radial-gradient(120% 100% at 70% 70%, #143a2f 0%, #03110b 70%); }

/* =========================================================
   Solutions / Tabs (spec §5)
   ========================================================= */

.solutions { padding: 120px 0; background: var(--color-black); }

.solutions__tabs {
  display: flex;
  gap: 32px;
  border-bottom: 1px solid var(--color-surface);
  margin-bottom: 40px;
  overflow-x: auto;
  scrollbar-width: none;
}
.solutions__tabs::-webkit-scrollbar { display: none; }

.solutions__tab {
  padding: 16px 4px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  white-space: nowrap;
}
.solutions__tab:hover { color: var(--color-white); }
.solutions__tab[aria-selected="true"] {
  color: var(--color-white);
  border-bottom-color: var(--color-gold);
}

.solutions__panel[hidden] { display: none; }

.card-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 300px);
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-surface) transparent;
}
.card-row::-webkit-scrollbar { height: 6px; }
.card-row::-webkit-scrollbar-thumb { background: var(--color-surface); border-radius: 3px; }

.card {
  background: var(--color-surface);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  scroll-snap-align: start;
  transition: transform 0.3s var(--ease);
}
.card:hover { transform: translateY(-4px); }
.card__img {
  aspect-ratio: 4 / 3;
  position: relative;
}
.card__img::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(255,255,255,0.06) 0%, transparent 50%);
}
.card__img--blue  { background: radial-gradient(circle at 30% 40%, #1f4d7a, #0a1620); }
.card__img--gold  { background: radial-gradient(circle at 70% 40%, #5e4a1a, #1a1408); }
.card__img--red   { background: radial-gradient(circle at 50% 60%, #5e1a1a, #160707); }
.card__img--green { background: radial-gradient(circle at 40% 50%, #1a5e44, #051a13); }

.card h3 {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  color: var(--color-white);
  padding: 18px 20px 4px;
  text-transform: none;
  letter-spacing: 0.02em;
}
.card__link {
  padding: 0 20px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s var(--ease);
}
.card:hover .card__link { color: var(--color-gold); }

/* =========================================================
   Features (spec §6)
   ========================================================= */

.features { padding: 60px 0 120px; background: var(--color-black); }

.features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  isolation: isolate;
}
.feature::before {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.9) 100%);
}
.feature:hover { transform: scale(1.01); box-shadow: 0 24px 50px -20px rgba(0,0,0,0.7); }
.feature:hover::before { background: linear-gradient(180deg, rgba(0,0,0,0.1) 30%, rgba(0,0,0,0.85) 100%); }

.feature--kit       { background: radial-gradient(120% 100% at 70% 30%, #2a3858 0%, #050810 80%); }
.feature--facility  { background: radial-gradient(120% 100% at 30% 30%, #58472a 0%, #100a05 80%); }
.feature--stories   { background: radial-gradient(120% 100% at 70% 70%, #582a2a 0%, #100505 80%); }
.feature--ready     { background: radial-gradient(120% 100% at 30% 70%, #2a583e 0%, #051008 80%); }

.feature__overlay {
  position: absolute;
  left: 32px; bottom: 32px;
  z-index: 2;
  max-width: 80%;
}
.feature__overlay h3 {
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  color: var(--color-white);
}
.feature__cta {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  transition: transform 0.25s var(--ease);
}
.feature:hover .feature__cta { transform: translateX(4px); }

/* =========================================================
   Stats (spec §7)
   ========================================================= */

.stats {
  background: var(--color-night);
  padding: 80px 0;
  border-top: 1px solid var(--color-surface);
  border-bottom: 1px solid var(--color-surface);
}

.stats__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stat {
  text-align: center;
  padding: 16px 24px;
  border-right: 1px solid var(--color-surface);
}
.stat:last-child { border-right: none; }

.stat__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 5vw, 56px);
  color: var(--color-gold);
  letter-spacing: 0.02em;
  line-height: 1;
}
.stat__num span {
  font-size: 0.7em;
  margin-left: 2px;
  opacity: 0.85;
}
.stat__label {
  margin-top: 12px;
  color: var(--color-muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

/* =========================================================
   Partners marquee
   ========================================================= */

.partners {
  background: var(--color-black);
  padding: 96px 0 72px;
  overflow: hidden;
}
.partners__head { text-align: center; margin-bottom: 48px; }
.partners__title {
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-white);
  max-width: 32ch;
  margin: 0 auto;
}

.marquee {
  position: relative;
  display: flex;
  width: 100%;
  overflow: hidden;
  user-select: none;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee__track {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 0;
  padding-right: 0;
  animation: marquee-scroll 38s linear infinite;
  will-change: transform;
}
.marquee:hover .marquee__track { animation-play-state: paused; }

.marquee__logo {
  display: inline-block;
  height: 56px;
  width: auto;
  margin: 0 48px;
  object-fit: contain;
  opacity: 0.75;
  transition: opacity 0.25s var(--ease);
  flex-shrink: 0;
}
.marquee__logo:hover { opacity: 1; }
.marquee__logo--invert { filter: invert(1) brightness(1.1); }

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-100%); }
}

@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
  .marquee { -webkit-mask-image: none; mask-image: none; flex-wrap: wrap; justify-content: center; }
  .marquee__track:nth-child(2) { display: none; }
}

/* =========================================================
   Partner (spec §8)
   ========================================================= */

.partner {
  position: relative;
  padding: 140px 0;
  background: var(--color-surface-2);
  overflow: hidden;
}
.partner__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 80% at 80% 50%, rgba(225,197,100,0.10), transparent 70%),
    radial-gradient(50% 80% at 10% 30%, rgba(60, 100, 140, 0.12), transparent 70%);
}
.partner__content {
  position: relative;
  max-width: 720px;
  text-align: left;
}
.partner__body {
  color: var(--color-muted);
  font-size: 17px;
  font-weight: 300;
  margin: 24px 0 36px;
  max-width: 56ch;
}

/* =========================================================
   Footer (spec §9)
   ========================================================= */

.footer {
  background: var(--color-black);
  color: var(--color-muted);
  padding: 80px 0 32px;
  border-top: 1px solid var(--color-surface);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 40px;
  margin-bottom: 56px;
}
.footer h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 18px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a {
  font-size: 14px;
  color: var(--color-white);
  opacity: 0.78;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}
.footer ul li a:hover { opacity: 1; color: var(--color-gold); }

.footer__newsletter {
  display: flex;
  border: 1px solid var(--color-surface);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 18px;
}
.footer__newsletter input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 10px 12px;
  font: inherit;
  color: var(--color-white);
  font-size: 13px;
}
.footer__newsletter input::placeholder { color: var(--color-muted); }
.footer__newsletter button {
  padding: 0 16px;
  background: var(--color-gold);
  color: var(--color-black);
  font-weight: 700;
  transition: background 0.2s var(--ease);
}
.footer__newsletter button:hover { background: var(--color-white); }

.footer__social { display: flex; gap: 10px; }
.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border: 1px solid var(--color-surface);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-white);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.footer__social a:hover { border-color: var(--color-gold); color: var(--color-gold); }

.footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  padding: 28px 0;
  border-top: 1px solid var(--color-surface);
  border-bottom: 1px solid var(--color-surface);
  margin-bottom: 24px;
}
.footer__contact-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 6px;
}
.footer__contact a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-white);
  letter-spacing: 0.04em;
  transition: color 0.2s var(--ease);
}
.footer__contact a:hover { color: var(--color-gold); }

.footer__bottom {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
}
.footer__slash {
  color: var(--color-gold);
  font-weight: 700;
  font-size: 16px;
  margin: 0 4px;
}
.footer__bottom nav { display: flex; gap: 18px; margin-left: auto; }
.footer__bottom nav a:hover { color: var(--color-gold); }

/* =========================================================
   Responsive (spec §11)
   ========================================================= */

/* Tablet: 768–1200px */
@media (max-width: 1200px) {
  .hero__tiles { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
}

/* Mobile: <768px */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__inner > .btn--quote { display: none; }
  .nav__burger { display: flex; }
  .nav--open .nav__mobile { display: flex; }

  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero__title { letter-spacing: 0.01em; }
  .hero__ctas { margin-bottom: 56px; }
  .hero__tiles { grid-template-columns: 1fr; }
  .tile { aspect-ratio: 16 / 9; }

  .solutions, .features { padding: 80px 0; }
  .features__grid { grid-template-columns: 1fr; }
  .feature { aspect-ratio: 4 / 3; }
  .feature__overlay { left: 24px; bottom: 24px; }

  .stats { padding: 56px 0; }
  .stats__row { grid-template-columns: repeat(2, 1fr); gap: 24px 0; }
  .stat { padding: 16px 12px; }
  .stat:nth-child(2) { border-right: none; }

  .partner { padding: 96px 0; }

  .footer__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .footer__contact { gap: 24px; }
  .footer__bottom nav { margin-left: 0; }
  .footer__slash { display: none; }
}

@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}