/* Master Air Duct Services - static site
   Graphite + fresh green, Manrope display, rounded cards, airflow motifs. */

:root {
  --ink: #15191f;
  --ink-2: #222831;
  --ink-3: #2e3642;
  --green: #22b45e;
  --green-dk: #178a47;
  --green-soft: #e3f6ea;
  --sky: #eaf5ff;
  --mist: #f5f7f9;
  --paper: #ffffff;
  --text: #39424e;
  --muted: #687482;
  --line: #e1e6ec;
  --r: 12px;
  --r-lg: 20px;
  --shadow: 0 22px 44px -26px rgba(21, 25, 31, .5);
  --shadow-sm: 0 10px 22px -16px rgba(21, 25, 31, .45);
  --display: 'Manrope', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--sans); font-size: 17px; line-height: 1.65; color: var(--text); background: var(--paper); overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--green-dk); text-decoration: none; }
a:hover { color: var(--ink); }
h1, h2, h3, h4 { font-family: var(--display); color: var(--ink); margin: 0 0 .5em; line-height: 1.12; letter-spacing: -.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.9rem); font-weight: 800; }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.7rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 800; letter-spacing: -.01em; }
h4 { font-size: 1rem; font-weight: 800; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
svg[aria-hidden] { width: 1.15em; height: 1.15em; flex: none; }

.wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.sec { padding: 96px 0; }
.sec--mist { background: var(--mist); }
.sec--ink { background: var(--ink); color: #b9c2cd; }
.sec--ink h2, .sec--ink h3 { color: #fff; }
[id] { scroll-margin-top: 90px; }
.center { text-align: center; }
.lead { font-size: 1.13rem; color: var(--muted); max-width: 64ch; }
.sec--ink .lead { color: #a3aebb; }
.center .lead { margin-left: auto; margin-right: auto; }
.head { margin-bottom: 52px; }
.note { font-size: .88rem; color: var(--muted); }

.tag { display: inline-flex; align-items: center; gap: 8px; font-family: var(--display); font-size: .8rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--green-dk); margin-bottom: 14px; }
.tag::before { content: ""; width: 18px; height: 8px; border-radius: 8px; background: var(--green); box-shadow: 10px 0 0 -2px rgba(34, 180, 94, .4); margin-right: 10px; }
.sec--ink .tag { color: #7ee2a4; }

.skip { position: absolute; left: -9999px; top: 0; z-index: 999; background: var(--ink); color: #fff; padding: 10px 16px; }
.skip:focus { left: 12px; top: 12px; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 15px 26px; border-radius: 999px; border: 2px solid transparent; font-family: var(--display); font-weight: 800; font-size: 1rem; line-height: 1.2; cursor: pointer; transition: transform .15s ease, background .15s ease; white-space: nowrap; }
.btn:hover { transform: translateY(-2px); }
.btn--green { background: var(--green); color: #fff; box-shadow: 0 14px 26px -14px rgba(34, 180, 94, .95); }
.btn--green:hover { background: var(--green-dk); color: #fff; }
.btn--ink { background: var(--ink); color: #fff; }
.btn--ink:hover { background: var(--ink-3); color: #fff; }
.btn--line { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn--line:hover { background: #fff; color: var(--ink); }
.btn--white { background: #fff; color: var(--ink); }
.btn--white:hover { background: var(--green-soft); color: var(--ink); }
.btn--sm { padding: 11px 18px; font-size: .92rem; }

/* Top bar + nav */
.topbar { background: var(--ink); color: #b9c2cd; font-size: .86rem; }
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 40px; flex-wrap: wrap; }
.topbar ul { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar li { display: flex; align-items: center; gap: 8px; }
.topbar svg { color: var(--green); }
.topbar a { color: #fff; font-weight: 700; }
.topbar a:hover { color: #7ee2a4; }

.nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 22px; min-height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand img { width: 46px; height: 46px; }
.brand > span { display: flex; flex-direction: column; line-height: 1.05; }
.brand b { font-family: var(--display); font-size: 1.28rem; font-weight: 800; letter-spacing: -.02em; }
.brand span span { font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--green-dk); margin-top: 5px; font-weight: 700; }
.menu { display: flex; gap: 26px; }
.menu a { color: var(--ink); font-weight: 600; font-size: .95rem; }
.menu a:hover { color: var(--green-dk); }
.navside { display: flex; align-items: center; gap: 16px; }
.navtel { display: flex; flex-direction: column; line-height: 1.15; text-align: right; }
.navtel small { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; }
.navtel a { font-family: var(--display); font-weight: 800; color: var(--ink); font-size: 1.08rem; }
.burger { display: none; width: 46px; height: 46px; border: 1px solid var(--line); background: #fff; border-radius: 50%; cursor: pointer; padding: 0; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.burger i { display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }

/* Breadcrumbs */
.crumbs { font-size: .86rem; color: #a3aebb; margin-bottom: 18px; }
.crumbs a { color: #d6dde5; }
.crumbs a:hover { color: #7ee2a4; }
.crumbs span { margin: 0 6px; opacity: .6; }

/* Hero */
.hero { position: relative; background: var(--ink); color: #b9c2cd; padding: 78px 0 90px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(760px 460px at 82% 20%, rgba(34, 180, 94, .22), transparent 62%), radial-gradient(520px 420px at 0% 100%, rgba(46, 54, 66, .9), transparent 70%); }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero h1 { color: #fff; }
.hero h1 em { font-style: normal; color: #5fd68f; }
.hero .lead { color: #b9c2cd; font-size: 1.18rem; margin-bottom: 30px; }
.hero__acts { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }
.hero__checks { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; max-width: 520px; }
.hero__checks li { display: flex; align-items: center; gap: 10px; font-weight: 600; color: #fff; font-size: .96rem; }
.hero__checks svg { color: var(--ink); background: #5fd68f; border-radius: 50%; padding: 3px; width: 22px; height: 22px; }
.hero__art img { width: 100%; border-radius: var(--r-lg); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .8); }

/* Strip */
.strip { background: var(--green); color: #fff; }
.strip .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip div { padding: 24px 20px; border-left: 1px solid rgba(255, 255, 255, .25); }
.strip div:first-child { border-left: 0; }
.strip b { display: block; font-family: var(--display); font-size: 1.3rem; font-weight: 800; line-height: 1.15; }
.strip span { font-size: .9rem; color: #e8fbef; }

/* Services */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.svc { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 30px 26px 26px; transition: transform .2s ease, box-shadow .2s ease; }
.svc:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.svc__ico { width: 56px; height: 56px; border-radius: 16px; background: var(--green-soft); color: var(--green-dk); display: grid; place-items: center; margin-bottom: 18px; }
.svc__ico svg { width: 28px; height: 28px; }
.svc p { font-size: .96rem; color: var(--muted); margin: 0; }

/* Regions + location cards */
.regions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.region { background: #fff; border-radius: var(--r-lg); padding: 30px; border: 1px solid var(--line); }
.region h3 { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; }
.region h3 svg { color: var(--green); width: 24px; height: 24px; }
.region p { color: var(--muted); font-size: .95rem; }
.locs { display: grid; gap: 10px; margin-top: 16px; }
.locs a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 18px; border-radius: var(--r); background: var(--mist); color: var(--ink); font-weight: 700; transition: background .15s ease; }
.locs a:hover { background: var(--green-soft); color: var(--ink); }
.locs a small { font-weight: 500; color: var(--muted); font-size: .84rem; }
.locs a svg { color: var(--green-dk); }

/* Before / after + why */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split img { border-radius: var(--r-lg); box-shadow: var(--shadow); width: 100%; }
.ticks { display: grid; gap: 16px; margin-top: 26px; }
.ticks li { display: flex; gap: 14px; }
.ticks span { width: 42px; height: 42px; border-radius: 12px; background: var(--green-soft); color: var(--green-dk); display: grid; place-items: center; flex: none; }
.ticks span svg { width: 22px; height: 22px; }
.ticks b { display: block; color: var(--ink); font-family: var(--display); }
.ticks p { margin: 0; font-size: .94rem; color: var(--muted); }
.sec--ink .ticks span { background: rgba(95, 214, 143, .14); color: #5fd68f; }
.sec--ink .ticks b { color: #fff; }
.sec--ink .ticks p { color: #a3aebb; }

/* Signs grid */
.signs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.signs li { background: var(--ink-2); border: 1px solid rgba(255, 255, 255, .07); border-radius: var(--r-lg); padding: 22px; }
.signs b { display: flex; align-items: center; gap: 10px; color: #fff; font-family: var(--display); margin-bottom: 6px; }
.signs b svg { color: #5fd68f; width: 22px; height: 22px; }
.signs p { margin: 0; font-size: .92rem; color: #a3aebb; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 28px 24px; position: relative; }
.step::before { counter-increment: s; content: counter(s); display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: #5fd68f; font-family: var(--display); font-weight: 800; font-size: 1.2rem; margin-bottom: 16px; }
.step p { margin: 0; font-size: .95rem; color: var(--muted); }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips li { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 9px 16px; font-weight: 600; font-size: .92rem; color: var(--ink); }
.chips li.zip { background: var(--mist); font-weight: 500; color: var(--muted); }

/* Area info */
.area { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
.map { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--line); }
.map iframe { display: block; width: 100%; height: 380px; border: 0; }
.map__bar { padding: 14px 20px; background: #fff; font-size: .9rem; color: var(--muted); }

/* FAQ */
.faq { max-width: 880px; margin: 0 auto; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); margin-bottom: 12px; overflow: hidden; }
.faq details[open] { border-color: var(--green); box-shadow: var(--shadow-sm); }
.faq summary { list-style: none; cursor: pointer; padding: 21px 62px 21px 24px; font-family: var(--display); font-weight: 800; color: var(--ink); position: relative; font-size: 1.04rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); width: 30px; height: 30px; border-radius: 50%; background: var(--green-soft); color: var(--green-dk); display: grid; place-items: center; font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; background: var(--green); color: #fff; }
.faq details > div { padding: 0 24px 22px; color: var(--muted); }
.faq details > div p:last-child { margin: 0; }

/* Contact */
.contact { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
.form { background: #fff; border-radius: var(--r-lg); padding: 38px; box-shadow: var(--shadow); }
.form h3 { font-size: 1.6rem; }
.fgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.fgrid .full { grid-column: 1 / -1; }
.form label { display: block; font-size: .84rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.form input, .form select, .form textarea { width: 100%; font: inherit; font-size: 1rem; color: var(--ink); background: var(--mist); border: 1px solid var(--line); border-radius: var(--r); padding: 13px 15px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--green); background: #fff; box-shadow: 0 0 0 4px rgba(34, 180, 94, .15); }
.form textarea { min-height: 100px; resize: vertical; }
.form .btn { width: 100%; margin-top: 20px; }
.info { display: grid; gap: 16px; }
.card { background: #fff; border-radius: var(--r-lg); padding: 26px 28px; border: 1px solid var(--line); }
.card h4 { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.card h4 svg { color: var(--green-dk); }
.card p { margin: 0; }
.card--ink { background: var(--ink); color: #b9c2cd; border-color: var(--ink); }
.card--ink h4 { color: #fff; }
.card--ink h4 svg { color: #5fd68f; }
.card .big { font-family: var(--display); font-size: 1.8rem; font-weight: 800; color: #fff; }

/* CTA + footer */
.cta { background: linear-gradient(120deg, var(--green-dk), var(--green)); color: #fff; }
.cta .wrap { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding-top: 60px; padding-bottom: 60px; flex-wrap: wrap; }
.cta h2 { color: #fff; margin-bottom: 6px; }
.cta p { margin: 0; color: #e8fbef; font-size: 1.1rem; }
.cta__acts { display: flex; gap: 14px; flex-wrap: wrap; }

.foot { background: #0f1216; color: #95a1ae; font-size: .93rem; padding-top: 72px; }
.foot__grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr 1fr; gap: 34px; }
.foot .brand, .foot .brand b { color: #fff; }
.foot .brand span span { color: #7ee2a4; }
.foot h4 { color: #fff; font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 16px; }
.foot li { margin-bottom: 9px; }
.foot a { color: #d3dae2; }
.foot a:hover { color: #7ee2a4; }
.foot__base { margin-top: 54px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 22px 0 28px; border-top: 1px solid rgba(255, 255, 255, .08); font-size: .85rem; }

.dock { display: none; }

@media (max-width: 1100px) {
  .navtel { display: none; }
  .menu { gap: 18px; }
  .foot__grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 960px) {
  .sec { padding: 76px 0; }
  .hero .wrap, .split, .area, .contact { grid-template-columns: 1fr; gap: 42px; }
  .hero__art { max-width: 580px; }
  .services, .signs { grid-template-columns: 1fr 1fr; }
  .regions { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .strip .wrap { grid-template-columns: 1fr 1fr; }
  .strip div:nth-child(3) { border-left: 0; }
  .strip div:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, .25); }
  .burger { display: flex; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .menu.open { display: flex; }
  .menu a { padding: 16px 24px; border-top: 1px solid var(--line); }
}
@media (max-width: 640px) {
  body { font-size: 16px; padding-bottom: 68px; }
  .wrap { padding: 0 16px; }
  .sec { padding: 60px 0; }
  .head { margin-bottom: 36px; }
  .topbar .wrap { justify-content: center; padding-top: 8px; padding-bottom: 8px; }
  .topbar .topbar__hide { display: none; }
  .nav .wrap { min-height: 66px; }
  .brand img { width: 40px; height: 40px; }
  .brand b { font-size: 1.1rem; }
  .navside .btn { display: none; }
  .hero { padding: 54px 0 64px; }
  .hero__acts .btn { flex: 1 1 100%; }
  .hero__checks, .services, .signs, .steps, .fgrid { grid-template-columns: 1fr; }
  .strip div { padding: 18px 14px; }
  .strip b { font-size: 1.05rem; }
  .region { padding: 24px 20px; }
  .form { padding: 28px 20px; }
  .map iframe { height: 300px; }
  .cta__acts, .cta__acts .btn { width: 100%; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
  .dock { display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: var(--ink); }
  .dock a { display: flex; align-items: center; justify-content: center; gap: 10px; background: var(--green); color: #fff; font-family: var(--display); font-weight: 800; border-radius: 999px; padding: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .svc { transition: none; }
}