:root {
  --ink: #0A0F1C;
  --obsidian: #0F172A;
  --slate: #1E293B;
  --steel: #334155;
  --mist: #64748B;
  --line-mist: #CBD5E1;
  --red: #E63946;
  --red-bright: #F25564;

  --blue: #1865D9;
  --blue-bright: #2BA4E8;
  --blue-cyan: #5BCDF0;
  --blue-deep: #0A4DB8;
  --blue-soft: rgba(24,101,217,0.1);

  --amber: #F89A1A;
  --amber-bright: #FFB940;
  --amber-deep: #C46808;
  --amber-soft: rgba(248,154,26,0.12);

  --paper: #F8FAFC;
  --paper-soft: #F1F5F9;
  --paper-warm: #FAFAF9;
  --cream: #FFFFFF;
  --ink-text: #0F172A;
  --muted: #475569;

  --line: rgba(15,23,42,0.08);
  --line-strong: rgba(15,23,42,0.16);
  --line-dark: rgba(255,255,255,0.08);
  --line-dark-strong: rgba(255,255,255,0.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; min-width: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; max-width: 100vw; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--paper); color: var(--ink-text);
  line-height: 1.6; -webkit-font-smoothing: antialiased;
  overflow-x: hidden; max-width: 100vw;
}
h1, h2, h3, h4 { font-family: 'Archivo Black', sans-serif; font-weight: 900; letter-spacing: -0.025em; line-height: 1.02; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.container-sm { max-width: 960px; margin: 0 auto; padding: 0 28px; }

/* ═════ Top emergency strip ═════ */
.announce { background: var(--ink); color: var(--paper); padding: 9px 0; font-size: 11px; font-weight: 600; letter-spacing: 0.5px; position: relative; overflow: hidden; }
.announce::before {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-cyan), transparent);
}
.announce-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.announce-left { display: flex; align-items: center; gap: 22px; }
.announce-left a { color: var(--paper); display: inline-flex; align-items: center; gap: 7px; font-weight: 700; transition: color 0.2s; }
.announce-left a:hover { color: var(--blue-cyan); }
.announce-left svg { width: 13px; height: 13px; color: var(--blue-cyan); }
.announce-right { color: var(--amber-bright); font-weight: 800; letter-spacing: 2.5px; text-transform: uppercase; font-size: 10px; display: inline-flex; align-items: center; gap: 7px; }
.announce-right .pulse { display: inline-block; width: 7px; height: 7px; background: var(--amber-bright); border-radius: 50%; box-shadow: 0 0 0 0 var(--amber-bright); animation: pulse 2s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255,185,64,0.55); }
  70% { box-shadow: 0 0 0 8px rgba(255,185,64,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,185,64,0); }
}

/* ═════ Nav ═════ */
.nav-wrap { background: var(--paper); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 80; }
.nav-wrap.scrolled { background: rgba(248,250,252,0.96); backdrop-filter: blur(12px); box-shadow: 0 4px 24px rgba(15,23,42,0.06); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 24px; }
.nav-logo { display: inline-block; }
.nav-logo img { height: 60px; width: auto; display: block; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-link { color: var(--ink-text); font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; transition: color 0.2s; position: relative; padding: 4px 0; }
.nav-link:hover, .nav-link.active { color: var(--blue); }
.nav-link.active::after { content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2px; background: var(--blue); }
.nav-right { display: flex; gap: 14px; align-items: center; }
.nav-phone { color: var(--ink-text); font-size: 14px; font-weight: 800; display: inline-flex; align-items: center; gap: 8px; }
.nav-phone svg { width: 16px; height: 16px; color: var(--blue); }

/* ═════ Buttons ═════ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; padding: 14px 26px; border: none; cursor: pointer; transition: all 0.25s; border-radius: 6px; white-space: nowrap; }
.btn-blue {
  background: var(--blue); color: var(--paper);
  box-shadow: 0 2px 0 var(--blue-deep), 0 10px 24px rgba(24,101,217,0.3);
}
.btn-blue:hover { background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 3px 0 var(--blue-deep), 0 16px 32px rgba(24,101,217,0.4); }
.btn-amber {
  background: var(--amber); color: var(--ink);
  box-shadow: 0 2px 0 var(--amber-deep), 0 10px 24px rgba(248,154,26,0.3);
}
.btn-amber:hover { background: var(--amber-bright); transform: translateY(-2px); box-shadow: 0 3px 0 var(--amber-deep), 0 16px 32px rgba(248,154,26,0.4); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--slate); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(15,23,42,0.3); }
.btn-outline { background: transparent; color: var(--ink-text); border: 2px solid var(--ink-text); }
.btn-outline:hover { background: var(--ink-text); color: var(--paper); }
.btn-outline-blue { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline-blue:hover { background: var(--blue); color: var(--paper); }
.btn-ghost-dark { background: rgba(255,255,255,0.06); color: var(--paper); border: 1px solid var(--line-dark-strong); backdrop-filter: blur(6px); }
.btn-ghost-dark:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn-lg { padding: 17px 32px; font-size: 14px; letter-spacing: 1.3px; }

/* ═════ Burger / Drawer ═════ */
.burger { display: none; background: 0; border: 0; width: 40px; height: 40px; color: var(--ink-text); cursor: pointer; }
.burger svg { width: 22px; height: 22px; }
.drawer { position: fixed; inset: 0; z-index: 200; background: var(--ink); padding: 80px 28px 40px; transform: translateX(100%); transition: transform 0.3s; display: flex; flex-direction: column; gap: 6px; }
.drawer.open { transform: translateX(0); }
.drawer a { color: var(--paper); font-family: 'Archivo Black', sans-serif; font-size: 28px; font-weight: 900; padding: 12px 0; border-bottom: 1px solid var(--line-dark); text-transform: uppercase; letter-spacing: 0.5px; }
.drawer a:hover { color: var(--blue-cyan); }
.drawer-close { position: absolute; top: 20px; right: 20px; background: 0; border: 0; width: 44px; height: 44px; color: var(--paper); cursor: pointer; font-size: 24px; }
.drawer-phone { color: var(--blue-cyan) !important; font-size: 22px !important; }
.drawer-cta { margin-top: 20px; }

/* ═════ Sections ═════ */
section { position: relative; }
.sec { padding: 100px 0; }
.sec-paper { background: var(--paper); }
.sec-soft { background: var(--paper-soft); }
.sec-warm { background: var(--paper-warm); }
.sec-ink { background: var(--ink); color: var(--paper); }
.sec-slate { background: var(--slate); color: var(--paper); }
.sec-blue { background: var(--blue); color: var(--paper); }

/* Airflow pattern overlay on dark sections */
.sec-ink::before, .sec-slate::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: url('/images/airflow-pattern.svg');
  background-size: 800px 400px; background-repeat: repeat;
  opacity: 0.45; z-index: 0;
}
.sec-ink > .container, .sec-slate > .container { position: relative; z-index: 1; }

.sec-head { margin-bottom: 60px; max-width: 760px; }
.sec-head-center { margin: 0 auto 60px; text-align: center; }
.sec-eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: 'Inter', sans-serif; font-size: 11px; font-weight: 800;
  letter-spacing: 4px; text-transform: uppercase; color: var(--blue);
  margin-bottom: 20px;
}
.sec-eyebrow::before { content: ''; width: 32px; height: 2px; background: var(--blue); }
.sec-head-center .sec-eyebrow { justify-content: center; }
.sec-ink .sec-eyebrow, .sec-slate .sec-eyebrow { color: var(--blue-cyan); }
.sec-ink .sec-eyebrow::before, .sec-slate .sec-eyebrow::before { background: var(--blue-cyan); }
.sec h2 { font-size: clamp(38px, 5vw, 68px); color: var(--ink-text); margin-bottom: 16px; }
.sec h2 em { font-style: normal; color: var(--blue); }
.sec-ink h2, .sec-slate h2 { color: var(--paper); }
.sec-ink h2 em, .sec-slate h2 em { color: var(--blue-cyan); }
.sec-sub { color: var(--muted); font-size: 17px; line-height: 1.7; max-width: 620px; }
.sec-ink .sec-sub, .sec-slate .sec-sub { color: rgba(248,250,252,0.7); }
.sec-blue h2 { color: var(--paper); }
.sec-blue h2 em { color: var(--amber-bright); }
.sec-blue .sec-sub { color: rgba(255,255,255,0.86); }

/* ═════ CTA banner ═════ */
.cta { background: var(--ink); color: var(--paper); padding: 88px 0; position: relative; overflow: hidden; }
.cta::before {
  content: ''; position: absolute; inset: 0; opacity: 0.5; pointer-events: none;
  background-image: url('/images/airflow-pattern.svg'); background-size: 800px 400px; background-repeat: repeat;
}
.cta::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--amber) 0%, var(--blue-cyan) 50%, var(--blue) 100%);
}
.cta-inner { display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: center; position: relative; z-index: 1; }
.cta h2 { font-size: clamp(36px, 5vw, 60px); color: var(--paper); line-height: 1.05; }
.cta h2 em { font-style: normal; color: var(--blue-cyan); }
.cta p { font-size: 15px; margin-top: 14px; color: rgba(248,250,252,0.72); max-width: 500px; }
.cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ═════ Footer ═════ */
.footer { background: var(--ink); color: var(--paper); padding: 72px 0 32px; border-top: 1px solid var(--line-dark); position: relative; overflow: hidden; }
.footer::before {
  content: ''; position: absolute; inset: 0; opacity: 0.3; pointer-events: none;
  background-image: url('/images/airflow-pattern.svg'); background-size: 800px 400px; background-repeat: repeat;
}
.footer > .container { position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; margin-bottom: 48px; }
.footer-logo img { height: 84px; width: auto; display: block; margin-bottom: 18px; }
.footer-about { color: rgba(255,255,255,0.55); font-size: 13px; line-height: 1.7; max-width: 320px; }
.footer-heading { font-family: 'Inter', sans-serif; font-size: 10px; letter-spacing: 3px; text-transform: uppercase; color: var(--blue-cyan); margin-bottom: 18px; font-weight: 800; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,0.55); font-size: 13px; transition: color 0.2s; }
.footer-links a:hover { color: var(--blue-cyan); }
.footer-contact-item { display: flex; gap: 11px; align-items: flex-start; margin-bottom: 14px; }
.footer-contact-item svg { width: 16px; height: 16px; color: var(--blue-cyan); flex-shrink: 0; margin-top: 3px; }
.footer-contact-item .l { font-size: 10px; letter-spacing: 2.5px; text-transform: uppercase; color: rgba(255,255,255,0.42); margin-bottom: 2px; }
.footer-contact-item .v { color: var(--paper); font-size: 13px; line-height: 1.5; }
.footer-contact-item .v a { color: var(--paper); }
.footer-contact-item .v a:hover { color: var(--blue-cyan); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 22px; border-top: 1px solid var(--line-dark); color: rgba(255,255,255,0.4); font-size: 11px; letter-spacing: 1px; }

/* ═════ Page hero (sub-pages) ═════ */
.page-hero { background: var(--ink); color: var(--paper); padding: 108px 0 84px; position: relative; overflow: hidden; border-bottom: 3px solid var(--blue); }
.page-hero::before {
  content: ''; position: absolute; inset: 0; opacity: 0.4; pointer-events: none;
  background-image: url('/images/airflow-pattern.svg'); background-size: 800px 400px; background-repeat: repeat;
}
.page-hero::after {
  content: ''; position: absolute; top: 0; right: 0; width: 50%; height: 100%;
  background: radial-gradient(circle at 100% 0%, rgba(91,205,240,0.18) 0%, transparent 60%);
  pointer-events: none;
}
.page-hero-inner { position: relative; z-index: 1; }
.breadcrumb { font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 22px; font-weight: 700; }
.breadcrumb a { color: var(--blue-cyan); }
.breadcrumb span { margin: 0 10px; color: rgba(255,255,255,0.25); }
.page-eyebrow { display: inline-flex; align-items: center; gap: 12px; font-family: 'Inter', sans-serif; font-size: 12px; font-weight: 800; letter-spacing: 4px; text-transform: uppercase; color: var(--blue-cyan); margin-bottom: 24px; }
.page-eyebrow::before { content: ''; width: 40px; height: 2px; background: var(--blue-cyan); }
.page-hero h1 { font-size: clamp(44px, 6.5vw, 84px); font-weight: 900; letter-spacing: -0.03em; color: var(--paper); }
.page-hero h1 em { font-style: normal; color: var(--blue-cyan); }
.page-hero-sub { font-size: 17px; line-height: 1.7; color: rgba(255,255,255,0.72); max-width: 680px; margin-top: 20px; }

/* ═════ Reveal ═════ */
.reveal { opacity: 0; transform: translateY(24px); transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.show { opacity: 1; transform: translateY(0); }

/* ═════ Mobile sticky CTA ═════ */
.mobile-sticky-cta {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 150;
  background: var(--ink);
  padding: 10px 12px; gap: 10px;
  box-shadow: 0 -8px 28px rgba(0,0,0,0.5);
  border-top: 2px solid var(--blue);
  transform: translateY(110%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-sticky-cta.show { transform: translateY(0); }
.mcta-btn {
  flex: 1; padding: 13px 10px;
  font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 800;
  letter-spacing: 1px; text-transform: uppercase;
  text-align: center; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 4px;
}
.mcta-call { background: var(--amber); color: var(--ink); }
.mcta-quote { background: var(--blue); color: var(--paper); }
.mcta-btn svg { width: 16px; height: 16px; }

/* ═════ Responsive ═════ */
@media (max-width: 1080px) {
  .cta-inner { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 720px) {
  .container, .container-sm { padding: 0 16px; }
  .announce { font-size: 9.5px; padding: 6px 0; }
  .announce-right { display: none; }
  .announce-left { gap: 14px; }
  .announce-left a span { display: none; }
  .announce-left a:first-child span { display: inline; }
  .nav { padding: 8px 0; gap: 8px; }
  .nav-logo img { height: 44px; }
  .nav-links, .nav-right .nav-phone, .nav-right .btn-outline-blue, .nav-right .btn-outline { display: none; }
  .burger { display: inline-flex; align-items: center; justify-content: center; }

  .sec { padding: 36px 0; }
  .sec-head { margin-bottom: 20px; max-width: 100%; }
  .sec h2 { font-size: 28px; line-height: 1.04; }
  .sec-sub { font-size: 13px; line-height: 1.55; }
  .sec-eyebrow { font-size: 9.5px; letter-spacing: 2.5px; margin-bottom: 10px; }
  .sec-eyebrow::before { width: 20px; }

  .page-hero { padding: 36px 0 32px; }
  .page-hero h1 { font-size: 32px; line-height: 1.04; }
  .page-hero-sub { font-size: 13px; line-height: 1.55; margin-top: 12px; }
  .page-eyebrow { font-size: 9.5px; letter-spacing: 2.5px; margin-bottom: 12px; }
  .breadcrumb { font-size: 9.5px; letter-spacing: 2px; margin-bottom: 12px; }

  .cta { padding: 36px 0; }
  .cta-inner { gap: 14px; }
  .cta h2 { font-size: 26px; line-height: 1.05; }
  .cta p { font-size: 12.5px; margin-top: 8px; }
  .cta-btns { flex-direction: column; width: 100%; gap: 7px; }
  .cta-btns .btn { width: 100%; }

  .footer { padding: 32px 0 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .footer-grid > div:nth-child(4) { grid-column: 1 / -1; }
  .footer-logo img { height: 56px; margin-bottom: 10px; }
  .footer-about { font-size: 12px; max-width: 100%; line-height: 1.6; }
  .footer-heading { font-size: 9px; letter-spacing: 2px; margin-bottom: 8px; }
  .footer-links li { margin-bottom: 5px; }
  .footer-links a { font-size: 11.5px; }
  .footer-contact-item { margin-bottom: 8px; }
  .footer-contact-item .v { font-size: 12px; }
  .footer-contact-item .l { font-size: 9px; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; padding-top: 14px; font-size: 10px; }

  .mobile-sticky-cta { display: flex; }
  body { padding-bottom: 64px; }

  .btn { padding: 11px 16px; font-size: 11.5px; letter-spacing: 0.6px; }
  .btn-lg { padding: 13px 20px; font-size: 12.5px; }
}
@media (max-width: 420px) {
  .sec h2 { font-size: 25px; }
  .page-hero h1 { font-size: 28px; }
  .cta h2 { font-size: 23px; }
}