/* ==========================================================
   Gonçalves Climatização
   Logo black, snowflake ice blue and white.
   ========================================================== */

:root {
  --black: #0A0D12;
  --graphite: #141A22;
  --ice: #68D6FB;        /* snowflake blue from the logo */
  --ice-dark: #0B6F96;   /* blue for text on white (5.6:1) */
  --white: #FFFFFF;
  --snow: #F3F7FA;
  --gray: #4F5B66;       /* secondary text (7:1 on white) */
  --gray-light: #A9B6C2;
  --line: #DCE4EB;
  --warning: #B4570A;

  --font: 'Sora', system-ui, sans-serif;
  --pad: clamp(20px, 5vw, 72px);
  --max: 1200px;
  --side: max(var(--pad), calc((100vw - var(--max)) / 2));
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; overflow-x: clip; background: var(--white); color: var(--black); font-family: var(--font); font-size: 16.5px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3, p, figure, ul, ol, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
h1, h2 { font-weight: 700; line-height: 1.08; letter-spacing: -0.03em; }
h2 { font-size: clamp(32px, 4vw, 52px); }
h3 { font-weight: 700; font-size: 21px; letter-spacing: -0.01em; }
button, input { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--ice); outline-offset: 3px; }
::selection { background: var(--ice); color: var(--black); }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 100; background: var(--ice); padding: 10px 16px; font-weight: 700; }
.skip-link:not(:focus) { width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 14px; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ice-dark); }
.eyebrow::before { content: ''; width: 22px; height: 2px; background: currentColor; }
.eyebrow-light { color: var(--ice); }
.section-head { max-width: 680px; margin-bottom: 46px; }
.lead { margin-top: 18px; font-size: 18px; color: var(--gray); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 12px 24px; border-radius: 8px; border: 2px solid transparent; font-weight: 600; font-size: 15.5px; text-align: center; text-decoration: none; transition: background .2s, color .2s, border-color .2s, transform .2s var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn-ice { background: var(--ice); color: var(--black); }
.btn-ice:hover { background: var(--white); }
.btn-outline { border-color: rgba(255,255,255,.45); color: var(--white); }
.btn-outline:hover { border-color: var(--ice); color: var(--ice); }
.btn-small { min-height: 42px; padding: 8px 16px; font-size: 14.5px; }
.btn-block { width: 100%; }
.wa-link { margin-top: auto; font-weight: 600; color: var(--ice-dark); text-underline-offset: 5px; }
.wa-link:hover { color: var(--black); }

/* ---------- Snowflake (from the logo) ---------- */
.snowflake { position: absolute; pointer-events: none; fill: none; stroke: var(--ice); stroke-width: 2.4; stroke-linecap: round; }

/* ---------- Header ---------- */
.site-header { position: fixed; inset: 0 0 auto; z-index: 40; height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 var(--side); background: var(--black); border-bottom: 1px solid #1F2731; }
.header-logo img { width: 150px; }
.site-header nav { display: flex; align-items: center; gap: 26px; }
.site-header nav a:not(.btn) { color: #D4DDE5; font-weight: 500; font-size: 15px; text-decoration: none; }
.site-header nav a:not(.btn):hover, .site-header nav a[aria-current] { color: var(--ice); }
.menu-toggle { display: none; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--black); color: var(--white); padding: 130px var(--side) 0; }
.snowflake-hero { width: 620px; right: -140px; top: 60px; opacity: .07; stroke-width: 1.4; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 40px; align-items: end; }
.hero-text { padding-bottom: 80px; }
.location { font-size: 14px; font-weight: 600; letter-spacing: .06em; color: var(--ice); }
.hero h1 { margin: 18px 0 22px; font-size: clamp(38px, 5vw, 62px); }
.hero h1 span { color: var(--ice); }
.hero-sub { max-width: 34em; font-size: 18px; color: #C4CFD9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.stats { display: flex; margin-top: 44px; border-top: 1px solid #222B36; padding-top: 22px; }
.stats div { padding-right: 32px; margin-right: 32px; border-right: 1px solid #222B36; }
.stats div:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.stats dt { font-size: 13px; color: var(--gray-light); }
.stats dd { font-size: 36px; font-weight: 700; color: var(--ice); line-height: 1.1; font-variant-numeric: tabular-nums; }
.hero-photo { position: relative; align-self: end; justify-self: center; width: min(100%, 420px); }
.hero-disc { position: absolute; left: 6%; right: 6%; bottom: 0; aspect-ratio: 1; border-radius: 50% 50% 0 0; background: var(--graphite); box-shadow: inset 0 0 0 1px #24303C; }
.hero-disc::after { content: ''; position: absolute; inset: 22px 22px 0; border-radius: 50% 50% 0 0; border: 2px dashed rgba(104,214,251,.35); border-bottom: 0; }
.hero-photo img { position: relative; width: 100%; }
.hero-name { position: absolute; left: -10px; bottom: 34px; display: flex; flex-direction: column; padding: 12px 18px; background: var(--white); color: var(--black); border-radius: 10px; border-left: 5px solid var(--ice); box-shadow: 0 14px 30px -14px rgba(0,0,0,.6); line-height: 1.3; }
.hero-name span { font-size: 13px; color: var(--gray); }

/* ---------- Brand strip ---------- */
.brand-strip { background: var(--white); border-bottom: 1px solid var(--line); padding: 24px 0 24px var(--side); }
.brand-strip-inner { display: flex; align-items: center; gap: 36px; }
.brand-strip-label { flex: none; font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--gray); }
.brand-marquee { --gap: 72px; flex: 1; min-width: 0; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.brand-track { display: flex; width: max-content; }
.motion .brand-track { animation: brand-scroll var(--duration, 30s) linear infinite; }
.brand-marquee:hover .brand-track { animation-play-state: paused; }
@keyframes brand-scroll { to { transform: translateX(-50%); } }
/* Same space after every logo (also across the loop seam); heights balance each logo's visual weight. */
.brand-set { display: flex; align-items: center; flex: none; }
.brand-set li { flex: none; display: flex; align-items: center; height: 40px; padding-right: var(--gap); }
.brand-set img { height: var(--h, 28px); width: auto; filter: grayscale(1); opacity: .65; transition: filter .3s, opacity .3s; }
.brand-set li:hover img { filter: none; opacity: 1; }
.logo-gree { --h: 26px; } .logo-agratto { --h: 19px; } .logo-elgin { --h: 30px; } .logo-tcl { --h: 28px; } .logo-philco { --h: 30px; }

/* ---------- Services ---------- */
.services { padding: 110px var(--side); }
.services-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.service-card { position: relative; display: flex; flex-direction: column; padding: 30px 24px 26px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); transition: border-color .3s, box-shadow .3s, transform .3s var(--ease); }
.service-card:hover { border-color: var(--ice-dark); box-shadow: 0 20px 40px -26px rgba(11,111,150,.45); transform: translateY(-4px); }
.service-icon { width: 54px; height: 54px; padding: 10px; margin-bottom: 20px; border-radius: 12px; background: var(--black); fill: none; stroke: var(--ice); stroke-width: 3.4; stroke-linecap: round; stroke-linejoin: round; transition: transform .35s var(--ease); }
.service-card:hover .service-icon { transform: rotate(-6deg) scale(1.06); }
.service-card > p { margin: 10px 0 16px; color: var(--gray); font-size: 15.5px; }
.service-card ul { margin-bottom: 22px; }
.service-card li { position: relative; padding: 6px 0 6px 22px; font-size: 14.5px; border-top: 1px solid var(--line); }
.service-card li::before { content: ''; position: absolute; left: 2px; top: 15px; width: 9px; height: 5px; border-left: 2px solid var(--ice-dark); border-bottom: 2px solid var(--ice-dark); transform: rotate(-45deg); }
#venda { border-color: var(--black); }
#venda .service-icon { background: var(--ice); stroke: var(--black); }

.symptoms { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 40px; margin-top: 64px; padding: clamp(26px, 4vw, 44px); border-radius: 18px; background: var(--snow); border: 1px solid var(--line); }
.symptoms-text p { margin-top: 10px; color: var(--gray); }
.symptom-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.symptom { min-height: 44px; padding: 8px 16px; border-radius: 999px; border: 1px solid #C4D1DC; background: var(--white); cursor: pointer; font-weight: 500; font-size: 15px; transition: background .2s, border-color .2s, color .2s; }
.symptom:hover { border-color: var(--ice-dark); }
.symptom[aria-selected="true"] { background: var(--black); border-color: var(--black); color: var(--white); }
.symptom-box { padding: 22px 24px; border-radius: 12px; background: var(--white); border-left: 4px solid var(--ice); }
.symptom-panel:not([hidden]) { animation: rise .4s var(--ease); }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.symptom-service { font-size: 14px; color: var(--ice-dark); margin-bottom: 6px; }
.symptom-panel > p:nth-child(2) { margin-bottom: 18px; }

/* ---------- Brands ---------- */
.brands { padding: 110px var(--side); background: var(--snow); }
.brands-top { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); gap: 48px; align-items: center; margin-bottom: 48px; }
.brands-photo { overflow: hidden; border-radius: 16px; }
.brands-photo img { width: 100%; aspect-ratio: 4 / 4.2; object-fit: cover; transition: transform .8s var(--ease); }
.brands-photo:hover img { transform: scale(1.04); }
.brands-head h2 span { color: var(--ice-dark); }
.brand-groups { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 20px; }
.brand-group { padding: 30px 30px 28px; border-radius: 16px; background: var(--white); border: 1px solid var(--line); transition: transform .3s var(--ease), box-shadow .3s; }
.brand-group:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(10,13,18,.35); }
.brand-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; background: var(--black); color: var(--ice); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.brand-badge::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--ice); }
.brand-logos { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 170px)); align-items: center; gap: 22px 34px; min-height: 96px; margin: 24px 0 20px; padding: 20px 0; border-block: 1px solid var(--line); }
.brand-logo { height: 46px; min-width: 0; }
.brand-logo img { width: 100%; height: 100%; object-fit: contain; object-position: left center; transition: transform .3s var(--ease); }
.brand-logo:hover img { transform: scale(1.08); }
.brand-group > p:last-child { color: var(--gray); font-size: 15.5px; }

.why { margin-top: 56px; }
.why h3 { font-size: 24px; margin-bottom: 22px; }
.why-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.why-list li { display: flex; flex-direction: column; gap: 8px; padding: 26px 24px; border-radius: 14px; background: var(--black); color: var(--white); }
.why-list span { font-size: 14px; font-weight: 700; color: var(--ice); }
.why-list strong { font-size: 18px; line-height: 1.3; }
.why-list p { color: #B9C5D0; font-size: 15px; }
.why-list li:first-child { background: var(--ice); color: var(--black); }
.why-list li:first-child span { color: var(--black); }
.why-list li:first-child p { color: #10313D; }

.warning { display: flex; gap: 16px; align-items: flex-start; margin-top: 24px; padding: 20px 22px; border-radius: 12px; background: #FFF6EC; border: 1px solid #F3D3B0; border-left: 5px solid var(--warning); }
.warning svg { flex: none; width: 26px; height: 26px; fill: none; stroke: var(--warning); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; margin-top: 2px; }
.warning p { color: #4A3320; }

/* ---------- Sales ---------- */
.sales { padding: 110px var(--side); background: var(--black); color: var(--white); }
.sales-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 56px; align-items: start; }
.sales-text > p:not(.eyebrow):not(.models-note) { margin-top: 16px; color: #C4CFD9; font-size: 17.5px; max-width: 36em; }
.models { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 34px; }
.models .model { flex: 0 0 calc((100% - 28px) / 3); min-width: 0; }
.model { display: flex; flex-direction: column; gap: 6px; padding: 22px 20px; border-radius: 14px; border: 1px solid #26313D; background: var(--graphite); transition: border-color .3s, transform .3s var(--ease); }
.model:hover { border-color: var(--ice); transform: translateY(-4px); }
.model strong { font-size: 30px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.model strong small { font-size: 14px; color: var(--ice); }
.model-mode { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ice); }
.model-mode svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.model-quente { color: #FFB86B; }
.model-use { font-size: 14px; color: var(--gray-light); margin-bottom: 10px; }
.model .wa-link { color: var(--ice); }
.model .wa-link:hover { color: var(--white); }
.models-note { margin-top: 14px; font-size: 14px; color: var(--gray-light); }

.btu { padding: 30px 28px; border-radius: 16px; background: var(--white); color: var(--black); }
.btu-title { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; }
.btu-sub { color: var(--gray); font-size: 15px; margin: 4px 0 20px; }
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field span, .field-set legend { font-size: 13px; font-weight: 600; color: var(--gray); }
.field input { min-height: 48px; padding: 8px 14px; border: 1px solid #C4D1DC; border-radius: 8px; font-size: 17px; font-weight: 600; background: var(--white); }
.field input:focus { outline: none; border-color: var(--ice-dark); box-shadow: 0 0 0 3px rgba(104,214,251,.35); }
.field-set { border: 0; padding: 0; margin: 0 0 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.field-set legend { width: 100%; margin-bottom: 8px; padding: 0; }
.field-set label { position: relative; cursor: pointer; }
.field-set input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.field-set span { display: inline-block; padding: 8px 20px; border-radius: 999px; border: 1px solid #C4D1DC; font-weight: 500; transition: background .2s, color .2s, border-color .2s; }
.field-set input:checked + span { background: var(--black); color: var(--white); border-color: var(--black); }
.field-set input:focus-visible + span { outline: 3px solid var(--ice); outline-offset: 2px; }
.btu-result { margin-bottom: 16px; padding: 16px 18px; border-radius: 12px; background: var(--snow); border-left: 4px solid var(--ice); }
.btu-result small { display: block; font-size: 13px; color: var(--gray); }
.btu-result strong { display: block; font-size: 26px; line-height: 1.2; }
.btu-result span { display: block; font-size: 14px; color: var(--ice-dark); font-weight: 600; margin-top: 2px; }
.btu-note { margin-top: 12px; font-size: 12.5px; color: var(--gray); line-height: 1.5; }

/* ---------- Technician ---------- */
.technician { padding: 110px var(--side); background: var(--snow); }
.technician-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 60px; align-items: center; }
.technician-photo { overflow: hidden; border-radius: 16px; }
.technician-photo img { width: 100%; aspect-ratio: 1400 / 1002; object-fit: cover; transition: transform .8s var(--ease); }
.technician-photo:hover img { transform: scale(1.03); }
.technician-text > p:not(.eyebrow) { margin-top: 16px; font-size: 17.5px; color: var(--gray); }
.credentials { margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.credentials li { padding: 16px 18px; background: var(--white); border: 1px solid var(--line); border-radius: 12px; display: flex; flex-direction: column; line-height: 1.35; transition: border-color .3s; }
.credentials li:hover { border-color: var(--ice-dark); }
.credentials strong { font-size: 15.5px; }
.credentials span { margin-top: 4px; font-size: 14px; color: var(--gray); }

/* ---------- Process ---------- */
.process { padding: 110px var(--side); background: var(--black); color: var(--white); border-top: 1px solid #1F2731; }
.process-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 60px; align-items: center; }
.steps { margin-top: 30px; }
.steps li { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 18px 0; border-top: 1px solid #222B36; }
.steps li > span { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; border: 2px solid var(--ice); color: var(--ice); font-weight: 700; font-size: 18px; transition: background .3s, color .3s; }
.steps li:hover > span { background: var(--ice); color: var(--black); }
.steps p { margin-top: 4px; color: #B9C5D0; font-size: 15.5px; }
.regions { position: relative; }
.regions img { width: 100%; border-radius: 16px; aspect-ratio: 1; object-fit: cover; }
.regions-text { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 18px 20px; background: rgba(10,13,18,.9); border-radius: 12px; }
.regions-title { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ice); font-weight: 700; }
.regions ul { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 6px; font-size: 20px; font-weight: 700; }

/* ---------- CTA ---------- */
.cta { position: relative; overflow: hidden; padding: 90px var(--side); background: var(--ice); color: var(--black); text-align: center; }
.snowflake-cta { width: 300px; left: -60px; top: -60px; stroke: var(--black); opacity: .08; }
.cta h2 { position: relative; max-width: 18em; margin: 0 auto; }
.cta-actions { position: relative; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 28px; }
.cta .btn-ice { background: var(--black); color: var(--white); }
.cta .btn-ice:hover { background: var(--graphite); }
.cta .btn-outline { border-color: var(--black); color: var(--black); }
.cta .btn-outline:hover { background: var(--black); color: var(--white); }

/* ---------- Footer ---------- */
.site-footer { background: var(--black); color: #B9C5D0; }
.footer-top { display: grid; grid-template-columns: auto 1fr auto; gap: 40px; align-items: center; padding: 50px var(--side) 36px; }
.footer-logo { width: 180px; }
.footer-top p { font-size: 15px; }
.footer-top nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-top nav a { text-decoration: none; font-weight: 500; }
.footer-top nav a:hover { color: var(--ice); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 18px var(--side) 24px; border-top: 1px solid #1F2731; font-size: 14px; }
.powered { text-decoration: none; }
.powered strong { color: var(--ice); }
.powered:hover strong { text-decoration: underline; text-underline-offset: 4px; }

.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 30; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 50%; background: var(--ice); box-shadow: 0 0 0 3px var(--black), 0 10px 20px -6px rgba(0,0,0,.5); transition: transform .25s var(--ease); }
.wa-float svg { width: 28px; height: 28px; fill: var(--black); }
.wa-float:hover { transform: scale(1.08); }

/* ==========================================================
   Motion (only when .motion is set and reduced motion is off)
   ========================================================== */
[data-delay="1"] { --d: 1; } [data-delay="2"] { --d: 2; } [data-delay="3"] { --d: 3; } [data-delay="4"] { --d: 4; }
.motion .enter { opacity: 0; translate: 0 26px; }
.motion.loaded .enter { opacity: 1; translate: 0 0; transition: opacity .8s ease, translate .9s var(--ease); transition-delay: calc(var(--d, 0) * 110ms + 80ms); }
.motion .snowflake-hero { rotate: -30deg; opacity: 0; }
.motion.loaded .snowflake-hero { rotate: 0deg; opacity: .07; transition: rotate 2.4s var(--ease), opacity 1.2s ease; }
.motion .reveal { opacity: 0; translate: 0 34px; transition: opacity .8s ease, translate .9s var(--ease), border-color .3s, box-shadow .3s, transform .3s var(--ease); transition-delay: calc(var(--d, 0) * 110ms), calc(var(--d, 0) * 110ms), 0s, 0s, 0s; }
.motion .reveal.visible { opacity: 1; translate: 0 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sales-grid { grid-template-columns: 1fr; }
  .btu { max-width: 560px; }
}
@media (max-width: 1000px) {
  .hero-grid, .technician-grid, .process-grid, .symptoms { grid-template-columns: 1fr; }
  .hero-text { padding-bottom: 20px; }
  .brand-groups { grid-template-columns: 1fr; }
  .why-list { grid-template-columns: 1fr; }
  .brand-strip-inner { flex-direction: column; align-items: stretch; gap: 14px; }
  .brand-strip { padding-right: var(--side); }
  .brands-top { grid-template-columns: 1fr; }
  .brands-photo { max-width: 520px; }
  .brands-photo img { aspect-ratio: 16 / 10; }
  .footer-top { grid-template-columns: auto 1fr; }
  .footer-top nav { grid-column: 1 / -1; }
}
@media (max-width: 860px) {
  .menu-toggle { display: flex; flex-direction: column; justify-content: center; gap: 7px; width: 48px; height: 48px; padding: 0 12px; position: relative; z-index: 42; background: var(--ice); border: 0; border-radius: 8px; cursor: pointer; }
  .menu-toggle span { height: 2px; background: var(--black); transition: transform .3s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4.5px) rotate(-45deg); }
  .site-header nav { position: fixed; inset: 0; z-index: 41; flex-direction: column; align-items: flex-start; justify-content: center; gap: 10px; padding: 90px var(--pad) 40px; background: var(--black); opacity: 0; visibility: hidden; transition: opacity .3s, visibility 0s .3s; }
  .site-header.open nav { opacity: 1; visibility: visible; transition: opacity .3s; }
  .site-header nav a:not(.btn) { font-size: 28px; font-weight: 600; color: var(--white); }
  .site-header nav .btn { margin-top: 18px; }
  .models .model { flex-basis: 100%; }
  .model { flex-direction: row; flex-wrap: wrap; align-items: baseline; column-gap: 14px; }
  .model .model-mode { width: 100%; }
  .model .wa-link { margin-left: auto; }
  .model-use { margin-bottom: 0; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header { height: 66px; }
  .header-logo img { width: 124px; }
  .hero { padding-top: 100px; }
  .hero h1 { font-size: clamp(32px, 9.2vw, 42px); }
  .hero-sub { font-size: 16.5px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .stats div { padding-right: 14px; margin-right: 14px; }
  .stats dd { font-size: 28px; }
  .stats dt { font-size: 12px; }
  .hero-photo { width: min(100%, 320px); }
  .hero-name { left: -6px; bottom: 24px; padding: 10px 14px; }
  .brand-marquee { --gap: 48px; }
  .brand-set li { height: 34px; }
  .logo-gree { --h: 22px; } .logo-agratto { --h: 16px; } .logo-elgin { --h: 25px; } .logo-tcl { --h: 23px; } .logo-philco { --h: 25px; }
  .services, .technician, .process, .brands, .sales { padding-block: 80px; }
  .services-grid { grid-template-columns: 1fr; }
  .symptoms { margin-top: 44px; gap: 22px; }
  .symptom-box .btn { width: 100%; }
  .brand-group { padding: 24px 20px; }
  .brand-logos { gap: 18px 28px; }
  .brand-logos { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 24px; }
  .brand-logo { height: 36px; }
  .lead { font-size: 16.5px; }
  .model .wa-link { margin-left: 0; width: 100%; }
  .btu { padding: 24px 20px; }
  .credentials { grid-template-columns: 1fr; }
  .regions ul { font-size: 18px; }
  .cta { padding-block: 70px; }
  .cta-actions .btn { width: 100%; }
  .footer-top { grid-template-columns: 1fr; gap: 20px; }
  .footer-bottom { flex-direction: column; padding-bottom: 96px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .brand-marquee { overflow-x: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}