/* Ref and AC Projects Ltd */
:root {
  --navy: #0c2236;
  --navy-2: #133552;
  --ice: #eef6fb;
  --ice-2: #dcecf6;
  --blue: #0b6fa4;
  --blue-dark: #085a86;
  --cyan: #5ccaf2;
  --warm: #f58a3c;
  --warm-text: #b8480f;
  --text: #182a3a;
  --muted: #475b6e;
  --line: #d3e2ec;
  --white: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(12, 34, 54, 0.08);
  --font-head: "Sora", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 8px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-head);
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 0.6em;
}

p { margin: 0 0 1em; }

a { color: var(--blue); }

:focus-visible {
  outline: 3px solid var(--warm);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1160px, 100% - 2.5rem);
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 100;
  padding: 0.75rem 1.1rem;
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--navy);
}

.brand-main {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.brand-amp {
  color: var(--blue);
  margin: 0 0.05em;
}

.brand-sub {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 0.55rem 0.95rem;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--navy);
  text-decoration: none;
  border-radius: 999px;
  transition: background-color 0.2s, color 0.2s;
}

.site-nav a:hover { background: var(--ice); color: var(--blue-dark); }

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  margin-left: -10px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle-bar { top: 50%; margin-top: -1px; }
.nav-toggle-bar::before,
.nav-toggle-bar::after { content: ""; left: 0; margin-left: 0; }
.nav-toggle-bar::before { top: -6px; }
.nav-toggle-bar::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.4rem;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); }

.btn-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); border-color: var(--white); }

.btn-small { min-height: 44px; padding: 0.6rem 1.15rem; font-size: 0.95rem; }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(600px 380px at 85% 20%, rgba(92, 202, 242, 0.22), transparent 70%),
    radial-gradient(520px 360px at 95% 95%, rgba(245, 138, 60, 0.18), transparent 70%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.035) 0 1px,
    transparent 1px 56px
  );
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  align-items: center;
  gap: 3rem;
  padding-block: clamp(4rem, 9vw, 7.5rem);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 1.25rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #d6effa;
  background: rgba(92, 202, 242, 0.12);
  border: 1px solid rgba(92, 202, 242, 0.35);
  border-radius: 999px;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.2rem, 5.2vw, 3.6rem);
  letter-spacing: -0.025em;
  max-width: 14ch;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: #d3e4ef;
  max-width: 38rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* CSS-only dial */
.hero-visual {
  display: flex;
  justify-content: center;
}

.dial {
  position: relative;
  width: min(340px, 80vw);
  aspect-ratio: 1;
}

.dial-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 200deg, var(--cyan), #3a8fd0 30%, #7a7fc0 55%, var(--warm) 80%, var(--cyan));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 18px), #000 calc(100% - 17px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 18px), #000 calc(100% - 17px));
  box-shadow: 0 0 80px rgba(92, 202, 242, 0.25);
}

.dial::after {
  content: "";
  position: absolute;
  inset: 34px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.22);
}

.dial-core {
  position: absolute;
  inset: 58px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #1d4a6e, var(--navy) 75%);
  box-shadow: inset 0 2px 20px rgba(0, 0, 0, 0.35);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dial-cold { color: var(--cyan); }
.dial-warm { color: var(--warm); }

.dial-line {
  width: 56%;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--warm));
}

/* Sections */
.section { padding-block: clamp(4rem, 8vw, 6.5rem); }
.section-alt { background: var(--ice); }

.section-head { max-width: 40rem; margin-bottom: 2.5rem; }

.kicker {
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warm-text);
}

.section h2 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); letter-spacing: -0.02em; }

.section-intro { color: var(--muted); font-size: 1.1rem; }

/* Service cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.card {
  position: relative;
  padding: 2rem 1.75rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
}

.card:nth-child(3)::before { background: linear-gradient(90deg, #f3b05a, var(--warm)); }

.card h3 { font-size: 1.25rem; margin-top: 1.25rem; }
.card p { color: var(--muted); margin: 0; }

.icon {
  position: relative;
  display: block;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--ice);
}

/* AC: fan */
.icon-ac::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: conic-gradient(var(--blue) 0 60deg, transparent 60deg 120deg, var(--blue) 120deg 180deg, transparent 180deg 240deg, var(--blue) 240deg 300deg, transparent 300deg);
}
.icon-ac::after {
  content: "";
  position: absolute;
  inset: 23px;
  border-radius: 50%;
  background: var(--ice);
  box-shadow: 0 0 0 3px var(--blue);
}

/* Refrigeration: crystal */
.icon-ref::before,
.icon-ref::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 30px;
  height: 4px;
  margin: -2px 0 0 -15px;
  border-radius: 2px;
  background: var(--blue);
}
.icon-ref::before { transform: rotate(60deg); }
.icon-ref::after { transform: rotate(-60deg); }
.icon-ref {
  background:
    linear-gradient(var(--blue), var(--blue)) center / 30px 4px no-repeat,
    var(--ice);
}

/* Heat: flame */
.icon-heat { background: #fdf0e6; }
.icon-heat::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 24px;
  height: 24px;
  margin: -9px 0 0 -12px;
  border-radius: 50% 0 50% 50%;
  background: linear-gradient(135deg, #f3b05a, var(--warm));
  transform: rotate(-45deg);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-copy p { color: var(--muted); font-size: 1.08rem; }

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 0;
}

.fact {
  padding: 1.25rem 1.35rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fact:last-child { grid-column: 1 / -1; }

.fact dt {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.fact dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--navy);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 1.5rem;
  align-items: stretch;
}

.contact-card {
  padding: 2rem 1.75rem;
  background: var(--navy);
  color: #d3e4ef;
  border-radius: var(--radius);
}

.contact-card h3 { color: var(--white); font-size: 1.25rem; }

.contact-card address {
  font-style: normal;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.contact-card .btn-primary { background: var(--white); color: var(--navy); }
.contact-card .btn-primary:hover { background: var(--ice-2); }
.contact-card :focus-visible { outline-color: var(--cyan); }

.map-wrap {
  min-height: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ice);
}

.map-wrap iframe {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 340px;
  border: 0;
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: #b9cddb;
  padding-block: 3rem 2.5rem;
  font-size: 0.95rem;
}

.footer-inner > * { margin-bottom: 0.9rem; }
.footer-inner > *:last-child { margin-bottom: 0; }

.footer-brand { display: flex; align-items: baseline; gap: 0.45rem; color: var(--white); }
.footer-brand .brand-amp { color: var(--cyan); }
.footer-brand .brand-sub { color: #b9cddb; }

.footer-legal {
  max-width: 60rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.875rem;
}

.footer-copy { font-size: 0.875rem; }

/* Responsive */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { justify-content: flex-start; }
  .dial { width: min(260px, 70vw); }
  .dial-core { inset: 46px; font-size: 1rem; }
  .dial::after { inset: 26px; }
  .cards { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(12, 34, 54, 0.08);
  }

  .site-nav.is-open { display: block; }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
    width: min(1160px, 100% - 2.5rem);
    margin-inline: auto;
    padding-block: 0.5rem 1rem;
  }

  .site-nav a { padding: 0.85rem 0.5rem; border-radius: 8px; }

  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  body { font-size: 1rem; }
  .brand-main { font-size: 1.3rem; }
  .brand-sub { font-size: 0.85rem; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-visual { display: none; }
  .facts { grid-template-columns: 1fr; }
  .card, .contact-card { padding: 1.6rem 1.35rem; }
}