/* ============================================================
   HiTech Vision — hitechvision.net
   Dark, cinematic home-theatre catalogue theme
   One stylesheet, mobile-first, no framework.
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  --bg:#0B0D12;
  --bg-2:#0E1118;
  --surface:#14171F;
  --surface-2:#191D27;
  --line:#252A36;
  --line-soft:#1E222D;
  --text:#EDEFF4;
  --muted:#9AA3B2;
  --muted-2:#6B7482;
  --accent:#3B82F6;
  --accent-hi:#38BDF8;
  --beam:#F5B851;
  --danger:#F87171;
  --ok:#34D399;

  --radius:14px;
  --radius-sm:10px;
  --radius-lg:22px;
  --container:1200px;
  --pad:clamp(20px,5vw,40px);
  --shadow:0 24px 60px -24px rgba(0,0,0,.7);
  --shadow-sm:0 8px 24px -12px rgba(0,0,0,.6);

  --font-display:"Sora","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-body:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.15;margin:0 0 .5em;letter-spacing:-.02em}
p{margin:0 0 1em}
::selection{background:var(--accent);color:#fff}

/* ---------- Layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding-inline:var(--pad)}
.section{padding-block:clamp(56px,9vw,110px)}
.section--tight{padding-block:clamp(40px,6vw,72px)}
.section--alt{background:var(--bg-2)}
.section--surface{background:var(--surface)}
.center{text-align:center}
.eyebrow{
  font-family:var(--font-display);
  text-transform:uppercase;
  letter-spacing:.22em;
  font-size:.72rem;
  font-weight:700;
  color:var(--accent-hi);
  margin:0 0 14px;
}
.section-title{font-size:clamp(1.7rem,3.6vw,2.6rem)}
.section-lead{color:var(--muted);font-size:1.06rem;max-width:60ch}
.section-intro{max-width:64ch}
.section-intro.center{margin-inline:auto}

/* ---------- Buttons ---------- */
.btn{
  --btn-bg:var(--accent);
  display:inline-flex;align-items:center;gap:.55em;
  padding:.85em 1.5em;
  border-radius:999px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:.95rem;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn .arrow{transition:transform .18s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 12px 30px -12px rgba(59,130,246,.7)}
.btn--primary:hover{background:#2f74ec;transform:translateY(-2px);box-shadow:0 18px 40px -14px rgba(59,130,246,.85)}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--accent-hi);color:#fff;transform:translateY(-2px)}
.btn--wa{background:#25D366;color:#05271a}
.btn--wa:hover{background:#20c15d;transform:translateY(-2px)}
.btn--sm{padding:.62em 1.1em;font-size:.85rem}
.btn--block{width:100%;justify-content:center}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,13,18,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease, background .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);background:rgba(11,13,18,.92)}
.header__inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:800;letter-spacing:-.01em}
.brand__mark{
  width:34px;height:34px;flex:none;border-radius:9px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--accent),var(--accent-hi));
  color:#fff;font-size:1rem;font-weight:800;
  box-shadow:0 8px 20px -8px rgba(56,189,248,.8);
}
.brand__text{font-size:1.12rem;line-height:1}
.brand__text small{display:block;font-size:.62rem;font-weight:600;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;margin-top:3px}
.nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav a{
  font-family:var(--font-display);font-weight:600;font-size:.92rem;
  color:var(--muted);padding:.55em .85em;border-radius:8px;transition:color .15s ease,background .15s ease;
}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text);background:var(--surface)}
/* keep button colours inside the nav (higher-specificity .nav a would otherwise win) */
.nav a.btn{padding:.62em 1.1em;border-radius:999px}
.nav a.btn--primary,.nav a.btn--primary:hover{color:#fff;background:var(--accent)}
.nav a.btn--primary:hover{background:#2f74ec}
.header__cta{margin-left:6px}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;margin:4px auto;background:var(--text);transition:.2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:900px){
  .nav-toggle{display:block}
  .header__cta{display:none}
  .nav{
    position:fixed;inset:72px 0 auto 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg-2);border-bottom:1px solid var(--line);
    padding:12px var(--pad) 22px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.22s ease;
  }
  .nav.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:.9em .4em;border-radius:0;border-bottom:1px solid var(--line-soft);font-size:1rem}
  .nav .btn{margin-top:14px;justify-content:center}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding-block:clamp(72px,13vw,150px);
  background:
    radial-gradient(1200px 520px at 78% -8%, rgba(59,130,246,.28), transparent 60%),
    radial-gradient(760px 380px at 10% 8%, rgba(245,184,81,.10), transparent 60%),
    var(--bg);
}
.hero::before{ /* projector beam */
  content:"";position:absolute;top:-12%;right:-4%;
  width:62vw;height:130%;
  background:conic-gradient(from 200deg at 100% 0%, rgba(56,189,248,.16), rgba(56,189,248,0) 32%);
  filter:blur(6px);pointer-events:none;
}
.hero::after{ /* grain / scanline */
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:repeating-linear-gradient(0deg, rgba(255,255,255,.017) 0 1px, transparent 1px 3px);
  mix-blend-mode:overlay;
}
.hero__inner{position:relative;z-index:1;max-width:760px}
.hero__title{font-size:clamp(2.2rem,6vw,4rem);margin-bottom:.35em}
.hero__title .accent{
  background:linear-gradient(120deg,var(--accent-hi),var(--beam));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__lead{font-size:clamp(1.02rem,2.2vw,1.22rem);color:var(--muted);max-width:56ch;margin-bottom:2em}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.hero__meta{display:flex;flex-wrap:wrap;gap:22px 34px;margin-top:42px;color:var(--muted-2);font-size:.85rem;font-family:var(--font-display);letter-spacing:.03em}
.hero__meta b{color:var(--text);font-weight:700;display:block;font-size:1.25rem;letter-spacing:-.02em}

/* ---------- Marquee ---------- */
.marquee{border-block:1px solid var(--line);background:var(--bg-2);overflow:hidden}
.marquee__track{
  display:flex;gap:0;white-space:nowrap;
  animation:marquee 34s linear infinite;
}
.marquee span{
  font-family:var(--font-display);font-weight:700;letter-spacing:.02em;
  font-size:.9rem;color:var(--muted);
  padding:16px 30px;position:relative;
}
.marquee span::after{content:"•";position:absolute;right:-4px;color:var(--accent)}
@keyframes marquee{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.marquee__track{animation:none}}

/* ---------- Generic grid ---------- */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--auto{grid-template-columns:repeat(auto-fill,minmax(270px,1fr))}
@media (max-width:900px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.grid--3,.grid--4,.grid--auto{grid-template-columns:1fr}}

/* ---------- Category cards ---------- */
.cat-card{
  position:relative;display:flex;flex-direction:column;gap:10px;
  padding:26px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,var(--surface),var(--bg-2));
  transition:transform .2s ease, border-color .2s ease;
  min-height:100%;
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.cat-card h3{font-size:1.18rem;margin:0}
.cat-card p{color:var(--muted);font-size:.92rem;margin:0}
.cat-card .link{margin-top:auto;padding-top:14px;color:var(--accent-hi);font-family:var(--font-display);font-weight:600;font-size:.9rem}
.cat-card__index{font-family:var(--font-display);font-weight:800;color:var(--line);font-size:1.6rem;position:absolute;top:18px;right:22px}

/* ---------- Product card ---------- */
.p-card{
  display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);overflow:hidden;
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.p-card:hover{transform:translateY(-5px);border-color:var(--accent);box-shadow:var(--shadow-sm)}
.p-card__media{
  position:relative;aspect-ratio:4/3;background:var(--bg-2);
  border-bottom:1px solid var(--line);overflow:hidden;
}
.p-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.p-card:hover .p-card__media img{transform:scale(1.04)}
.p-card__tag{
  position:absolute;top:12px;left:12px;
  background:rgba(11,13,18,.78);backdrop-filter:blur(4px);
  border:1px solid var(--line);
  font-family:var(--font-display);font-size:.68rem;font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;color:var(--accent-hi);
  padding:.4em .7em;border-radius:999px;
}
.p-card__body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.p-card__body h3{font-size:1.03rem;margin:0;line-height:1.3}
.p-card__spec{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px}
.p-card__spec span{
  font-size:.74rem;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:.25em .55em;
  font-family:var(--font-display);font-weight:600;
}
.p-card__cta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line-soft);
  font-family:var(--font-display);font-weight:600;font-size:.88rem;color:var(--accent-hi);
}
.p-card__price-note{color:var(--muted-2);font-size:.76rem;font-weight:500}

/* ---------- Filter bar ---------- */
.filter{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  margin-bottom:32px;
}
.filter__group{display:flex;flex-wrap:wrap;gap:8px}
.filter__label{font-size:.74rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted-2);font-family:var(--font-display);font-weight:700;width:100%;margin-top:6px}
.chip{
  font-family:var(--font-display);font-weight:600;font-size:.83rem;
  color:var(--muted);background:var(--surface);
  border:1px solid var(--line);border-radius:999px;
  padding:.5em 1em;cursor:pointer;transition:.15s ease;
}
.chip:hover{color:var(--text);border-color:var(--muted-2)}
.chip.is-active{background:var(--accent);color:#fff;border-color:var(--accent)}
.catalogue__count{color:var(--muted-2);font-size:.85rem;margin-bottom:20px;font-family:var(--font-display)}
.catalogue__empty{color:var(--muted);padding:40px 0;text-align:center;display:none}

/* ---------- Split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,64px);align-items:center}
.split--rev .split__media{order:-1}
.split__media{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:var(--bg-2);aspect-ratio:4/3;
}
.split__media img{width:100%;height:100%;object-fit:cover}
@media (max-width:820px){.split{grid-template-columns:1fr}.split--rev .split__media{order:0}}

/* ---------- Steps / how it works ---------- */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--surface)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-family:var(--font-display);font-weight:800;font-size:1.1rem;
  color:var(--accent-hi);display:block;margin-bottom:12px;
}
.step h3{font-size:1.04rem;margin:0 0 6px}
.step p{color:var(--muted);font-size:.9rem;margin:0}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* ---------- Feature list ---------- */
.ticks{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.ticks li{position:relative;padding-left:34px;color:var(--muted)}
.ticks li strong{display:block;color:var(--text);font-family:var(--font-display);font-weight:600;margin-bottom:2px}
.ticks li::before{
  content:"";position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:6px;
  background:linear-gradient(140deg,var(--accent),var(--accent-hi));
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/14px no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/14px no-repeat;
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:clamp(32px,6vw,60px);
  background:
    radial-gradient(600px 300px at 85% 0%, rgba(59,130,246,.25), transparent 65%),
    linear-gradient(180deg,var(--surface),var(--bg-2));
  text-align:center;
}
.cta-band h2{font-size:clamp(1.6rem,3.4vw,2.3rem)}
.cta-band p{color:var(--muted);max-width:52ch;margin-inline:auto}
.cta-band .hero__actions{justify-content:center;margin-top:26px}

/* ---------- Product detail ---------- */
.pd{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,60px);align-items:start}
@media (max-width:900px){.pd{grid-template-columns:1fr}}
.pd__media{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-2);
  position:sticky;top:96px;
}
@media (max-width:900px){.pd__media{position:static}}
.pd__frame{aspect-ratio:16/10;position:relative;background:#05070b;padding:18px}
.pd__frame img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 20px 40px rgba(0,0,0,.6))}
.pd__cat{color:var(--accent-hi)}
.pd__title{font-size:clamp(1.5rem,3.6vw,2.2rem)}
.pd__summary{color:var(--muted);font-size:1.05rem}
.table{width:100%;border-collapse:collapse;margin:22px 0 26px;font-size:.92rem}
.table th,.table td{text-align:left;padding:11px 2px;border-bottom:1px solid var(--line-soft);vertical-align:top}
.table th{color:var(--muted-2);font-family:var(--font-display);font-weight:600;width:38%;white-space:nowrap;padding-right:14px}
.table td{color:var(--text)}
.inquire-box{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);padding:22px;margin-top:8px;
}
.inquire-box h3{font-size:1.05rem;margin:0 0 6px}
.inquire-box p{color:var(--muted);font-size:.88rem;margin:0 0 16px}
.inquire-box .btn{margin:4px 8px 4px 0}

/* ---------- Forms ---------- */
.form{display:grid;gap:16px;max-width:620px}
.form--wide{max-width:none}
.field{display:grid;gap:6px}
.field label{font-family:var(--font-display);font-weight:600;font-size:.85rem;color:var(--text)}
.field .req{color:var(--accent-hi)}
.field input,.field select,.field textarea{
  width:100%;padding:.8em .9em;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-sm);
  color:var(--text);font-family:inherit;font-size:.95rem;transition:border-color .15s ease, box-shadow .15s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.22)
}
.field textarea{min-height:130px;resize:vertical}
.field--row{grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.field--row{grid-template-columns:1fr}}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form__note{color:var(--muted-2);font-size:.8rem}
.form__status{display:none;padding:14px 16px;border-radius:var(--radius-sm);font-size:.9rem}
.form__status.is-ok{display:block;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.4);color:#a7f3d0}
.form__status.is-err{display:block;background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.4);color:#fecaca}

/* ---------- Info cards (contact) ---------- */
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:34px}
@media (max-width:760px){.info-grid{grid-template-columns:1fr}}
.info-card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:var(--surface)}
.info-card h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted-2);margin:0 0 8px}
.info-card p,.info-card a{color:var(--text);font-size:.98rem;margin:0;word-break:break-word}
.info-card a:hover{color:var(--accent-hi)}
.map-embed{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:16/7;background:var(--bg-2)}
.map-embed iframe{width:100%;height:100%;border:0;filter:grayscale(.3) contrast(1.05)}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding-block:56px 30px;margin-top:20px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
@media (max-width:860px){.footer__grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.footer__grid{grid-template-columns:1fr}}
.footer__grid h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted-2);margin:0 0 14px}
.footer__grid a{display:block;color:var(--muted);font-size:.9rem;padding:4px 0;transition:color .15s ease}
.footer__grid a:hover{color:var(--text)}
.footer__brand p{color:var(--muted);font-size:.9rem;max-width:34ch;margin:12px 0 0}
.footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid var(--line);margin-top:40px;padding-top:22px;
  color:var(--muted-2);font-size:.82rem;
}

/* ---------- Floating WhatsApp ---------- */
.wa-float{
  position:fixed;right:18px;bottom:18px;z-index:70;
  display:flex;align-items:center;gap:10px;
  background:#25D366;color:#05271a;
  font-family:var(--font-display);font-weight:700;font-size:.9rem;
  padding:.8em 1.1em;border-radius:999px;
  box-shadow:0 14px 34px -10px rgba(37,211,102,.6);
  transition:transform .18s ease;
}
.wa-float:hover{transform:translateY(-3px)}
.wa-float svg{width:20px;height:20px;flex:none}
@media (max-width:560px){.wa-float span{display:none}.wa-float{padding:.9em}}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{
  padding-block:clamp(52px,8vw,84px);
  background:
    radial-gradient(900px 360px at 82% -20%, rgba(59,130,246,.22), transparent 60%),
    var(--bg-2);
  border-bottom:1px solid var(--line);
}
.page-hero h1{font-size:clamp(1.9rem,4.4vw,2.9rem);margin-bottom:.3em}
.page-hero p{color:var(--muted);max-width:58ch;font-size:1.05rem;margin:0}
.breadcrumb{font-size:.82rem;color:var(--muted-2);margin-bottom:16px;font-family:var(--font-display)}
.breadcrumb a:hover{color:var(--accent-hi)}

/* ---------- Reveal animation ----------
   Content is visible by default. The hidden start-state applies ONLY when JS
   has added .js-anim to <html>, so a JS failure never hides content. */
.js-anim .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.js-anim .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js-anim .reveal{opacity:1;transform:none;transition:none}}

/* ---------- Misc ---------- */
.prose p{color:var(--muted);max-width:68ch}
.prose h2{margin-top:1.6em}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.tag-row span{font-size:.76rem;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:.3em .6em;font-family:var(--font-display);font-weight:600}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:12px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}