/* ============================================================
   Advanced Tint Solutions — 2026 build
   near-black + cool steel/ice-blue + chrome
   ============================================================ */
:root{
  --ink:#05070b;
  --ink-2:#0a0e16;
  --panel:#0e131d;
  --panel-2:#121a27;
  --line:rgba(150,178,210,.14);
  --text:#eaf1fa;
  --muted:#9fb0c6;
  --ice:#7fd3ff;
  --ice-2:#41a9ff;
  --steel:#5b7ea3;
  --chrome:#dfe9f4;
  --heat:#ff9a3c;
  --heat-2:#ff5e3a;
  --grad: linear-gradient(120deg,#7fd3ff 0%,#bfe9ff 38%,#dfe9f4 70%,#7fd3ff 100%);
  --maxw:1180px;
  --r:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.05;letter-spacing:-.02em;margin:0}
strong{color:#fff}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,5vw,40px)}

.skip-link{position:absolute;left:-999px;top:0;background:var(--ice);color:#04121f;padding:10px 16px;border-radius:0 0 10px 0;z-index:200;font-weight:700}
.skip-link:focus{left:0}

:focus-visible{outline:2px solid var(--ice);outline-offset:3px;border-radius:6px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-height:48px;padding:0 22px;border-radius:999px;
  font-weight:700;font-size:1rem;letter-spacing:.01em;cursor:pointer;border:1px solid transparent;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:var(--grad);background-size:200% 100%;color:#04121f;box-shadow:0 10px 30px -10px rgba(127,211,255,.6)}
.btn-primary:hover{background-position:100% 0;box-shadow:0 14px 40px -10px rgba(127,211,255,.8)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--ice);color:#fff}
.btn-full{width:100%}
.btn-call{background:rgba(127,211,255,.1);border-color:rgba(127,211,255,.35);color:var(--ice);min-height:44px;font-size:.95rem}
.btn-call .dot{width:8px;height:8px;border-radius:50%;background:var(--ice);box-shadow:0 0 0 0 rgba(127,211,255,.7);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(127,211,255,.55)}70%{box-shadow:0 0 0 9px rgba(127,211,255,0)}100%{box-shadow:0 0 0 0 rgba(127,211,255,0)}}

.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:120;transition:background .35s var(--ease),box-shadow .35s var(--ease),backdrop-filter .35s var(--ease)}
.header-inner{display:flex;align-items:center;gap:18px;padding-block:16px;transition:padding .35s var(--ease)}
.site-header.shrink{background:rgba(5,7,11,.72);backdrop-filter:blur(16px) saturate(140%);box-shadow:0 1px 0 var(--line),0 18px 40px -30px rgba(0,0,0,.9)}
.site-header.shrink .header-inner{padding-block:9px}
.brand{display:inline-flex;align-items:center}
.brand-logo{height:40px;width:auto;transition:height .35s var(--ease)}
.site-header.shrink .brand-logo{height:32px}
.main-nav{display:none;margin-left:auto;gap:26px}
.main-nav a{color:var(--muted);font-weight:600;font-size:.95rem;position:relative;padding:4px 0}
.main-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;background:var(--ice);transition:right .3s var(--ease)}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{right:0}
.header-call{margin-left:auto}
@media(min-width:920px){.main-nav{display:flex}.header-call{margin-left:0}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(40px,9vh,90px) 0 clamp(30px,6vh,70px);isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-1;background:
  radial-gradient(120% 80% at 78% -10%,rgba(65,169,255,.18),transparent 55%),
  radial-gradient(90% 60% at 12% 110%,rgba(20,40,70,.5),transparent 60%),
  linear-gradient(180deg,#04060a 0%,#070b13 60%,#05070b 100%)}
.sun{position:absolute;top:-12%;right:-8%;width:46vw;max-width:520px;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(255,196,120,.9),rgba(255,140,60,.35) 38%,transparent 66%);
  filter:blur(6px);animation:sunPulse 7s ease-in-out infinite}
@keyframes sunPulse{0%,100%{transform:scale(1);opacity:.85}50%{transform:scale(1.08);opacity:1}}
.heat-shimmer{position:absolute;top:0;right:0;width:60vw;height:46vh;
  background:repeating-linear-gradient(95deg,rgba(255,180,110,.05) 0 8px,transparent 8px 20px);
  mix-blend-mode:screen;animation:shimmer 5s ease-in-out infinite;transform-origin:top}
@keyframes shimmer{0%,100%{transform:skewX(0deg);opacity:.7}50%{transform:skewX(-2.5deg);opacity:.35}}
.grid-glow{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:60px 60px;mask:radial-gradient(70% 60% at 50% 30%,#000,transparent 75%);opacity:.5}

.hero-inner{position:relative}
.eyebrow{font-size:.82rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ice);font-weight:700;margin:0 0 18px}
.hero-title{font-size:clamp(2.6rem,11vw,5.6rem);font-weight:800}
.hero-sub{max-width:60ch;color:var(--muted);font-size:clamp(1.02rem,2.6vw,1.22rem);margin:22px 0 28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-cta .btn{flex:1 1 auto;min-width:180px}
@media(min-width:560px){.hero-cta .btn{flex:0 0 auto}}

/* Tint demo — signature motion #1 */
.tint-demo{margin:0;max-width:760px}
.tint-stage{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);box-shadow:0 40px 90px -40px rgba(0,0,0,.9);cursor:ew-resize;touch-action:none;user-select:none}
.tint-img{width:100%;display:block;aspect-ratio:16/9;object-fit:cover}
.tint-overlay{position:absolute;inset:0;width:0%;
  background:linear-gradient(120deg,rgba(8,16,28,.62),rgba(20,40,66,.5));
  border-right:2px solid rgba(127,211,255,.8);
  backdrop-filter:saturate(115%) brightness(.92);transition:width .05s linear}
.glare{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 50% at 70% 25%,rgba(255,220,170,.55),transparent 60%);
  mix-blend-mode:screen;opacity:1;transition:opacity .2s linear}
.tint-handle{position:absolute;top:0;bottom:0;left:0;width:44px;transform:translateX(-50%);
  display:flex;align-items:center;justify-content:center;cursor:ew-resize;z-index:3}
.handle-grip{width:42px;height:42px;border-radius:50%;background:rgba(8,14,22,.7);border:1.5px solid var(--ice);
  backdrop-filter:blur(6px);position:relative;box-shadow:0 6px 20px rgba(0,0,0,.5)}
.handle-grip::before,.handle-grip::after{content:"";position:absolute;top:50%;width:0;height:0;border:5px solid transparent;transform:translateY(-50%)}
.handle-grip::before{left:7px;border-right-color:var(--ice)}
.handle-grip::after{right:7px;border-left-color:var(--ice)}
.tint-tag{position:absolute;top:14px;font-size:.72rem;font-weight:700;letter-spacing:.04em;padding:5px 11px;border-radius:999px;backdrop-filter:blur(6px);transition:opacity .3s}
.tag-bare{left:14px;background:rgba(255,120,60,.18);color:#ffcaa0;border:1px solid rgba(255,150,90,.4)}
.tag-cool{right:14px;background:rgba(127,211,255,.16);color:var(--ice);border:1px solid rgba(127,211,255,.4);opacity:0}
.tint-cap{margin-top:14px;color:var(--muted);font-size:.92rem;font-weight:600}
.tint-cap #rejectReadout{color:var(--ice)}

.scroll-hint{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);width:24px;height:38px;border:2px solid rgba(255,255,255,.25);border-radius:14px;display:flex;justify-content:center;padding-top:7px}
.scroll-hint span{width:4px;height:8px;border-radius:2px;background:var(--ice);animation:scrolly 1.8s infinite}
@keyframes scrolly{0%{transform:translateY(0);opacity:1}70%{transform:translateY(10px);opacity:0}100%{opacity:0}}

/* ---------- Marquee ---------- */
.marquee{border-block:1px solid var(--line);background:var(--ink-2);overflow:hidden;padding:14px 0}
.marquee-track{display:flex;gap:26px;white-space:nowrap;width:max-content;animation:marq 26s linear infinite;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--chrome);font-size:.92rem}
.marquee-track .sep{color:var(--ice)}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marq{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- Stats ---------- */
.stats{padding:clamp(40px,7vw,72px) 0;background:linear-gradient(180deg,var(--ink),var(--ink-2))}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(min-width:760px){.stats-grid{grid-template-columns:repeat(4,1fr)}}
.stat{text-align:center;padding:18px 8px;border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.02)}
.stat-num{font-size:clamp(2.2rem,7vw,3.3rem);font-weight:800;line-height:1;color:#fff;display:flex;justify-content:center;align-items:baseline}
.stat-num .plus{color:var(--ice)}
.stat-label{margin-top:8px;color:var(--muted);font-size:.9rem;font-weight:600}

/* ---------- Section base ---------- */
section{padding:clamp(54px,9vw,110px) 0}
.section-eyebrow{font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ice);font-weight:700;margin:0 0 12px}
.section-title{font-size:clamp(1.9rem,6vw,3.3rem);font-weight:800;max-width:18ch;margin-bottom:18px}

/* ---------- Services / tabs ---------- */
.tabs{position:relative;display:inline-flex;gap:4px;padding:5px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.03);margin:6px 0 30px}
.tab{position:relative;z-index:2;border:0;background:transparent;color:var(--muted);font-weight:700;font-size:1rem;padding:10px 22px;min-height:44px;border-radius:999px;cursor:pointer;transition:color .25s}
.tab.is-active{color:#04121f}
.tab-ink{position:absolute;z-index:1;top:5px;height:calc(100% - 10px);border-radius:999px;background:var(--grad);transition:transform .35s var(--ease),width .35s var(--ease);box-shadow:0 8px 20px -8px rgba(127,211,255,.7)}
.panel{display:none;grid-template-columns:1fr;gap:26px;align-items:center}
.panel.is-active{display:grid;animation:fadeUp .5s var(--ease)}
@media(min-width:860px){.panel{grid-template-columns:1.05fr 1fr;gap:48px}}
.panel-media{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);box-shadow:0 30px 70px -40px rgba(0,0,0,.9)}
.panel-media img{width:100%;aspect-ratio:3/2;object-fit:cover}
.panel-copy h3{font-size:clamp(1.4rem,4vw,2rem);margin-bottom:12px}
.panel-copy p{color:var(--muted)}
.ticks{list-style:none;padding:0;margin:18px 0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:30px;color:var(--text)}
.ticks li::before{content:"";position:absolute;left:0;top:8px;width:16px;height:9px;border-left:2.5px solid var(--ice);border-bottom:2.5px solid var(--ice);transform:rotate(-45deg)}
.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--ice);font-weight:700}
.link-arrow span{transition:transform .25s var(--ease)}
.link-arrow:hover span{transform:translateX(5px)}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- Heat story ---------- */
.heat{background:radial-gradient(120% 90% at 100% 0,rgba(255,120,60,.1),transparent 55%),linear-gradient(180deg,var(--ink-2),var(--ink))}
.heat-inner{display:grid;grid-template-columns:1fr;gap:34px;align-items:center}
@media(min-width:900px){.heat-inner{grid-template-columns:1.05fr .95fr;gap:56px}}
.heat-copy p{color:var(--muted)}
.heat-points{list-style:none;padding:0;margin:20px 0 26px;display:grid;gap:12px}
.heat-points li{padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.02)}
.heat-points strong{color:var(--ice)}
.heat-visual{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.heat-card{position:relative;overflow:hidden;border-radius:var(--r);aspect-ratio:3/4;display:flex;flex-direction:column;justify-content:flex-end;padding:18px;border:1px solid var(--line)}
.heat-bare{background:linear-gradient(180deg,#3a1c10,#7a2c14)}
.heat-cool{background:linear-gradient(180deg,#0c2236,#0a2f4a)}
.heat-waves{position:absolute;inset:0;background:repeating-linear-gradient(0deg,rgba(255,170,90,.18) 0 6px,transparent 6px 16px);animation:rise 3.5s linear infinite;mix-blend-mode:screen}
@keyframes rise{from{background-position:0 0}to{background-position:0 -22px}}
.cool-glow{position:absolute;inset:0;background:radial-gradient(70% 60% at 50% 20%,rgba(127,211,255,.25),transparent 65%);animation:breathe 5s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:.6}50%{opacity:1}}
.heat-temp{position:relative;font-size:clamp(2.2rem,9vw,3.4rem);font-weight:800;line-height:1}
.heat-bare .heat-temp{color:#ffb486}
.heat-cool .heat-temp{color:var(--ice)}
.heat-cap{position:relative;color:var(--muted);font-weight:700;font-size:.9rem;margin-top:4px}
.disclaimer{color:var(--steel);font-size:.78rem;margin-top:26px}

/* ---------- Why ---------- */
.why-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:640px){.why-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.why-grid{grid-template-columns:repeat(4,1fr)}}
.why-card{padding:24px;border:1px solid var(--line);border-radius:var(--r);background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.01));transition:transform .35s var(--ease),border-color .35s var(--ease)}
.why-card:hover{transform:translateY(-5px);border-color:rgba(127,211,255,.4)}
.why-ico{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:12px;background:rgba(127,211,255,.12);color:var(--ice);font-size:1.3rem;margin-bottom:14px}
.why-card h3{font-size:1.18rem;margin-bottom:8px}
.why-card p{color:var(--muted);font-size:.95rem;margin:0}

/* ---------- About ---------- */
.about-inner{display:grid;grid-template-columns:1fr;gap:34px;align-items:center}
@media(min-width:900px){.about-inner{grid-template-columns:1fr 1.05fr;gap:56px}}
.about-media{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);box-shadow:0 30px 70px -40px rgba(0,0,0,.9)}
.about-media img{aspect-ratio:3/2;object-fit:cover;width:100%}
.about-copy p{color:var(--muted)}
.about-meta{display:grid;gap:12px;margin-top:22px}
.about-meta>div{display:flex;flex-direction:column;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.02)}
.meta-k{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ice);font-weight:700}
.meta-v{color:var(--text);font-weight:600}
.meta-v a{color:var(--ice)}

/* ---------- Reviews ---------- */
.reviews-note{color:var(--muted);margin:-6px 0 26px;font-size:.95rem}
.review-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:780px){.review-grid{grid-template-columns:repeat(3,1fr)}}
.review{margin:0;padding:24px;border:1px solid var(--line);border-radius:var(--r);background:linear-gradient(180deg,rgba(127,211,255,.05),rgba(255,255,255,.01))}
.stars{color:#ffd76a;letter-spacing:2px;margin-bottom:10px}
.review p{margin:0 0 14px;color:var(--text)}
.review cite{color:var(--muted);font-style:normal;font-size:.85rem;font-weight:600}

/* ---------- Area ---------- */
.area-list{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-wrap:wrap;gap:10px}
.area-list li{padding:9px 16px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.03);font-weight:600;font-size:.92rem;transition:border-color .3s,color .3s}
.area-list li:hover{border-color:var(--ice);color:var(--ice)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:840px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.02);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:700;font-size:1.05rem;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:44px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--ice);font-size:1.5rem;font-weight:400;transition:transform .3s var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{margin:0;padding:0 22px 20px;color:var(--muted)}

/* ---------- Contact ---------- */
.contact{background:linear-gradient(180deg,var(--ink),#070c15)}
.contact-inner{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:900px){.contact-inner{grid-template-columns:1fr 1fr;gap:56px}}
.contact-meta{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:14px}
.contact-meta li{display:flex;flex-direction:column;border-left:2px solid var(--ice);padding-left:16px}
.contact-meta span{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ice);font-weight:700}
.contact-meta a{color:#fff;font-weight:700;font-size:1.15rem}
.quote-form{padding:26px;border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.03);backdrop-filter:blur(10px);display:grid;gap:16px}
.field{display:grid;gap:7px}
.field label{font-size:.82rem;font-weight:700;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;min-height:48px;border-radius:12px;border:1px solid var(--line);background:rgba(4,8,14,.6);color:var(--text);font:inherit;font-size:1rem;transition:border-color .25s,box-shadow .25s}
.field textarea{min-height:90px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ice);box-shadow:0 0 0 3px rgba(127,211,255,.18)}
.form-status{margin:0;font-weight:700;font-size:.95rem;min-height:1.2em}
.form-status.ok{color:var(--ice)}
.form-alt{margin:0;color:var(--muted);font-size:.9rem;text-align:center}
.form-alt a{color:var(--ice);font-weight:700}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink);padding:40px 0 110px}
.footer-inner{display:grid;gap:12px;text-align:center;justify-items:center}
.footer-inner .brand-logo,.footer-inner img{height:40px;width:auto}
.footer-nap{color:var(--muted);margin:0}
.footer-nap a{color:var(--ice);font-weight:700}
.footer-fine{color:var(--steel);font-size:.82rem;margin:0;max-width:60ch}

/* ---------- Sticky mobile call bar ---------- */
.call-bar{position:fixed;left:12px;right:12px;bottom:12px;z-index:130;display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:16px;background:linear-gradient(120deg,#0a2740,#08436b);border:1px solid rgba(127,211,255,.4);box-shadow:0 18px 40px -16px rgba(0,0,0,.8);color:#fff;backdrop-filter:blur(8px);transform:translateY(140%);transition:transform .4s var(--ease)}
.call-bar.show{transform:translateY(0)}
.call-bar-ico{font-size:1.3rem}
.call-bar-text{display:flex;flex-direction:column;line-height:1.15;flex:1}
.call-bar-text strong{font-size:.98rem}
.call-bar-text small{color:var(--ice);font-weight:700}
.call-bar-go{font-size:1.3rem;color:var(--ice)}
@media(min-width:920px){.call-bar{display:none}}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .sun,.heat-shimmer,.heat-waves,.cool-glow,.marquee-track,.scroll-hint span,.btn-call .dot{animation:none}
  .marquee-track{transform:none}
  .call-bar{transform:none}
}