/* ==========================================================================
   Universe Air Solution — marketing site
   Cool blue / cyan theme · mobile-first · plain CSS (no build)
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --blue-50:  #eff7fc;
  --blue-100: #d6ecf8;
  --blue-200: #a9d6f0;
  --blue-300: #6cb8e3;
  --blue-400: #2b97d3;
  --blue-500: #0b7bbf;
  --blue-600: #0b6fb8;
  --blue-700: #0a5e9c;
  --blue-800: #0a4d80;
  --blue-900: #0a3a60;

  --cyan-300: #5cd0e6;
  --cyan-400: #28b9d4;
  --cyan-500: #0fa3bf;

  --ink-900: #0d1b2a;
  --ink-700: #25364a;
  --ink-500: #4a5b70;
  --ink-300: #8a96a6;
  --ink-100: #d8dee5;

  --bg:       #ffffff;
  --bg-alt:   #f4f9fd;
  --bg-deep:  #06243d;

  --green-500: #1bb574;
  --wa-500:    #25d366;

  /* Brand red dot from logo */
  --brand-red: #d41616;

  --shadow-sm: 0 1px 2px rgba(10, 58, 96, .06), 0 1px 1px rgba(10, 58, 96, .04);
  --shadow-md: 0 8px 20px -8px rgba(10, 58, 96, .15), 0 2px 6px rgba(10, 58, 96, .06);
  --shadow-lg: 0 24px 60px -20px rgba(10, 58, 96, .25), 0 6px 16px rgba(10, 58, 96, .08);

  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 22px;

  --container: 1200px;

  --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --header-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-700);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { color: var(--blue-700); }
button { font: inherit; cursor: pointer; border: 0; background: none; }
ul { padding: 0; margin: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink-900);
  line-height: 1.18;
  margin: 0 0 .5em;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.18rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }
p  { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .75rem;
  font-weight: 700;
  color: var(--cyan-500);
  margin-bottom: 12px;
}
.eyebrow--blue { color: var(--blue-600); }
.eyebrow .dot { color: var(--brand-red); }

.grad {
  background: linear-gradient(95deg, var(--blue-600) 0%, var(--cyan-400) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .98rem;
  letter-spacing: .01em;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; fill: currentColor; }
.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background: linear-gradient(95deg, var(--blue-600), var(--cyan-500));
  color: #fff;
  box-shadow: 0 8px 22px -8px rgba(11, 111, 184, .55);
}
.btn--primary:hover { box-shadow: 0 14px 28px -10px rgba(11, 111, 184, .7); color: #fff; }

.btn--whatsapp { background: var(--wa-500); color: #fff; box-shadow: 0 8px 22px -8px rgba(37, 211, 102, .55); }
.btn--whatsapp:hover { background: #1ebe5c; color: #fff; }

.btn--ghost {
  background: #fff; color: var(--blue-700);
  border: 1.5px solid var(--blue-200);
}
.btn--ghost:hover { background: var(--blue-50); }

/* ---------- Topbar ---------- */
.topbar {
  background: var(--bg-deep);
  color: #cfe3f3;
  font-size: .82rem;
}
.topbar__inner { display: flex; align-items: center; gap: 12px; min-height: 38px; flex-wrap: wrap; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__item svg { width: 14px; height: 14px; fill: var(--cyan-300); }
.topbar__sep { opacity: .35; }
.topbar__spacer { flex: 1; }
.topbar__cta {
  color: #fff; font-weight: 600; display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; background: rgba(255,255,255,.08);
}
.topbar__cta svg { width: 14px; height: 14px; fill: #fff; }
.topbar__cta:hover { background: rgba(255,255,255,.16); color: #fff; }

@media (max-width: 640px) {
  .topbar__item:nth-child(3), .topbar__sep { display: none; }
}

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .2s, border-color .2s;
}
.header.is-scrolled { box-shadow: var(--shadow-sm); border-bottom-color: var(--ink-100); }
.header__inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-h); gap: 16px; }

.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink-900); }
.brand__logo {
  height: 44px; width: auto; max-width: 240px; object-fit: contain;
  display: block;
}
@media (max-width: 540px) {
  .brand__logo { height: 36px; max-width: 180px; }
}

.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  color: var(--ink-700); font-weight: 500; font-size: .96rem; padding: 6px 0;
  position: relative;
}
.nav a:hover { color: var(--blue-700); }
.nav a:not(.nav__cta)::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: linear-gradient(95deg, var(--blue-600), var(--cyan-400));
  transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav a:not(.nav__cta):hover::after { transform: scaleX(1); }
.nav__cta {
  background: linear-gradient(95deg, var(--blue-600), var(--cyan-500));
  color: #fff !important; padding: 10px 18px !important; border-radius: 999px;
  box-shadow: 0 8px 18px -8px rgba(11,111,184,.55);
}
.nav__cta:hover { transform: translateY(-1px); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  width: 42px; height: 42px; align-items: center; justify-content: center;
  border-radius: 10px; border: 1px solid var(--ink-100); background: #fff;
}
.nav__toggle span { width: 20px; height: 2px; background: var(--ink-700); border-radius: 2px; transition: .2s; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 920px) {
  .nav__toggle { display: flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 0 0;
    background: #fff; flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px 20px 24px; transform: translateX(100%);
    transition: transform .25s ease; box-shadow: var(--shadow-lg);
    overflow: auto;
  }
  .nav a { padding: 14px 4px; border-bottom: 1px solid var(--ink-100); font-size: 1.05rem; }
  .nav__cta { margin-top: 14px; text-align: center; }
  .nav.is-open { transform: translateX(0); }
}

/* ---------- Hero ---------- */
.hero { position: relative; padding: 68px 0 80px; overflow: hidden; }
.hero__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(800px 460px at 85% -10%, rgba(40,185,212,.18), transparent 60%),
    radial-gradient(700px 500px at -5% 30%, rgba(11,111,184,.16), transparent 55%),
    linear-gradient(180deg, #f4faff 0%, #ffffff 70%);
}
.hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero__copy .lede { font-size: 1.08rem; color: var(--ink-700); max-width: 56ch; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 32px; }

.hero__stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; max-width: 560px; }
.hero__stats li {
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 14px; text-align: center; box-shadow: var(--shadow-sm);
}
.hero__stats strong {
  display: block; font-family: var(--font-display); font-weight: 800; color: var(--blue-700);
  font-size: 1.45rem; line-height: 1;
  position: relative;
}
.hero__stats li:first-child strong::after {
  content: ''; position: absolute; right: 6px; top: 4px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--brand-red);
}
.hero__stats span { font-size: .78rem; color: var(--ink-500); }

.hero__visual { position: relative; }
.hero__visual img {
  width: 100%; height: 460px; object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.hero__badge {
  position: absolute; left: -18px; bottom: 24px;
  background: #fff; color: var(--ink-900);
  padding: 12px 16px; border-radius: 14px;
  display: inline-flex; align-items: center; gap: 10px;
  box-shadow: var(--shadow-md);
  font-weight: 600; font-size: .92rem;
}
.hero__badge strong { color: var(--blue-700); }
.hero__badge svg { width: 22px; height: 22px; fill: var(--cyan-500); }
.hero__badge::after {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand-red); display: inline-block;
  box-shadow: 0 0 0 4px rgba(212, 22, 22, .15);
}

@media (max-width: 920px) {
  .hero { padding: 44px 0 56px; }
  .hero__inner { grid-template-columns: 1fr; gap: 36px; }
  .hero__visual img { height: 320px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Trust strip ---------- */
.trust {
  background: var(--bg-deep); color: #cfe3f3; padding: 22px 0;
}
.trust__inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; align-items: center;
}
.trust__item { display: flex; align-items: center; gap: 10px; font-size: .94rem; }
.trust__item svg { width: 22px; height: 22px; fill: var(--cyan-300); flex: 0 0 auto; }
@media (max-width: 920px) {
  .trust__inner { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section--alt { background: var(--bg-alt); }
.section--daikin { background: linear-gradient(180deg, #fff 0%, #eff7fc 100%); }
.section__head { max-width: 760px; margin: 0 auto 48px; text-align: center; }
.section__sub { color: var(--ink-500); font-size: 1.05rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.grid-2--center { align-items: center; }
@media (max-width: 920px) {
  .section { padding: 60px 0; }
  .grid-2 { grid-template-columns: 1fr; gap: 36px; }
}

/* check list */
.check-list { margin: 18px 0 24px; }
.check-list li {
  position: relative; padding: 6px 0 6px 32px; color: var(--ink-700);
}
.check-list li::before {
  content: ''; position: absolute; left: 0; top: 12px; width: 20px; height: 20px;
  background: var(--blue-50);
  border-radius: 50%;
}
.check-list li::after {
  content: ''; position: absolute; left: 5px; top: 16px; width: 10px; height: 5px;
  border-left: 2px solid var(--blue-600); border-bottom: 2px solid var(--blue-600);
  transform: rotate(-45deg);
}

/* ---------- About ---------- */
.about__visual img,
.daikin__visual img {
  width: 100%; height: 420px; object-fit: cover;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}

/* ---------- Service cards ---------- */
.cards {
  display: grid; gap: 22px;
  grid-template-columns: repeat(4, 1fr);
}
.card {
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 24px; transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
}
.card__icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.card__icon svg { width: 24px; height: 24px; fill: var(--blue-600); }
.card h3 { margin-bottom: 6px; }
.card p { color: var(--ink-500); font-size: .94rem; margin: 0; }

@media (max-width: 1100px) { .cards { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px)  { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .cards { grid-template-columns: 1fr; } }

/* ---------- Industries ---------- */
.industries { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry {
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 22px; text-align: center;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.industry:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--blue-200); }
.industry__icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.industry__icon svg { width: 24px; height: 24px; fill: var(--blue-600); }
.industry h3 { font-size: 1rem; margin-bottom: 4px; }
.industry p { font-size: .86rem; color: var(--ink-500); margin: 0; }
@media (max-width: 1100px) { .industries { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px)  { .industries { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .industries { grid-template-columns: 1fr; } }

/* ---------- Why us ---------- */
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why__item {
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 26px; position: relative; overflow: hidden;
}
.why__item::after {
  content: ''; position: absolute; right: -30px; top: -30px; width: 120px; height: 120px;
  border-radius: 50%; background: radial-gradient(circle, var(--blue-50), transparent 70%);
}
.why__num {
  font-family: var(--font-display); font-weight: 800; font-size: 1.6rem;
  color: var(--cyan-500); margin-bottom: 8px;
}
.why__item h3 { margin-bottom: 6px; }
.why__item p { color: var(--ink-500); font-size: .94rem; margin: 0; }
@media (max-width: 920px) { .why { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .why { grid-template-columns: 1fr; } }

/* ---------- Chips ---------- */
.chips {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.chips li {
  padding: 10px 16px; border-radius: 999px;
  background: #fff; border: 1px solid var(--blue-100);
  color: var(--ink-700); font-weight: 500; font-size: .94rem;
  box-shadow: var(--shadow-sm);
  transition: all .2s;
}
.chips li:hover { background: var(--blue-50); border-color: var(--blue-300); color: var(--blue-700); }
.chips--inline { justify-content: flex-start; gap: 8px; }
.chips--inline li { padding: 7px 12px; font-size: .85rem; }
.chips--light li {
  background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18);
  color: #cfe3f3;
}
.chips--light li:hover { background: rgba(255,255,255,.16); color: #fff; border-color: var(--cyan-300); }

/* ---------- Areas grid (Trichy + PAN India) ---------- */
.areas-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.areas-card {
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-sm);
}
.areas-card h3 {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 4px;
}
.areas-card p { color: var(--ink-500); font-size: .94rem; margin-bottom: 16px; }
.areas-card--dark {
  background: linear-gradient(160deg, #0a3a60, #06243d);
  border-color: transparent;
  color: #cfe3f3;
}
.areas-card--dark h3 { color: #fff; }
.areas-card--dark p { color: #a9c3d8; }
.dot-red {
  width: 10px; height: 10px; border-radius: 50%; background: var(--brand-red);
  box-shadow: 0 0 0 4px rgba(212, 22, 22, .15);
  display: inline-block; flex: 0 0 auto;
}
@media (max-width: 920px) { .areas-grid { grid-template-columns: 1fr; } }

/* ---------- Contact ---------- */
.contact-list { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.contact-row {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border: 1px solid var(--ink-100); border-radius: var(--radius);
  padding: 16px 18px; color: var(--ink-700);
  transition: all .2s;
}
.contact-row:hover { border-color: var(--blue-300); transform: translateX(2px); color: var(--ink-700); }
.contact-row--static { cursor: default; }
.contact-row--static:hover { border-color: var(--ink-100); transform: none; }
.contact-row__icon {
  width: 44px; height: 44px; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
  border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
}
.contact-row__icon svg { width: 22px; height: 22px; fill: var(--blue-600); }
.contact-row strong { display: block; color: var(--ink-900); font-weight: 700; }
.contact-row em { font-style: normal; color: var(--ink-500); font-size: .88rem; display: block; }

.map { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.map iframe {
  width: 100%; height: 480px; border: 0; display: block;
}
@media (max-width: 920px) { .map iframe { height: 320px; } }

/* ---------- Footer ---------- */
.footer { background: var(--bg-deep); color: #b6cee0; padding-top: 56px; }
.footer__inner {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 36px;
}
.footer__brand p { color: #92acc4; font-size: .94rem; max-width: 36ch; margin-top: 8px; }
.footer__logo {
  height: 50px; width: auto; max-width: 240px;
  display: block; margin-bottom: 6px;
  background: #fff; padding: 8px 12px; border-radius: 10px;
}
.footer h4 { color: #fff; margin-bottom: 12px; }
.footer ul li { padding: 4px 0; }
.footer a { color: #b6cee0; }
.footer a:hover { color: var(--cyan-300); }
.footer__bar {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0; font-size: .85rem; color: #7e98b0;
}
.footer__bar-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 920px) {
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer__inner { grid-template-columns: 1fr; }
}

/* ---------- Floating mobile CTAs ---------- */
.float-call, .float-wa {
  position: fixed; bottom: 18px; z-index: 60;
  width: 54px; height: 54px; border-radius: 50%;
  display: none; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg);
}
.float-call { right: 84px; background: linear-gradient(135deg, var(--blue-600), var(--cyan-500)); }
.float-wa   { right: 18px; background: var(--wa-500); }
.float-call svg, .float-wa svg { width: 24px; height: 24px; fill: #fff; }
@media (max-width: 720px) { .float-call, .float-wa { display: inline-flex; } }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Selection ---------- */
::selection { background: var(--blue-200); color: var(--ink-900); }