/* RJB LED LCD TV Service Centre — shared stylesheet.
   Dark "screen glow" theme: deep panel black, RGB sub-pixel accents. */

:root {
  --bg: #06070c;
  --bg-2: #0b0d17;
  --surface: #11141f;
  --surface-2: #171b2b;
  --line: rgba(255, 255, 255, .08);
  --line-2: rgba(255, 255, 255, .16);
  --text: #eef1f8;
  --muted: #a1a9bd;
  --dim: #6f7890;
  --red: #ff3d6e;
  --green: #22e6a0;
  --blue: #3d8bff;
  --cyan: #22d3ee;
  --violet: #a855f7;
  --accent: #22d3ee;
  --grad: linear-gradient(100deg, var(--red), var(--violet) 35%, var(--blue) 65%, var(--green));
  --grad-loop: linear-gradient(100deg, var(--red), var(--violet), var(--blue), var(--green), var(--blue), var(--violet), var(--red));
  --grad-soft: linear-gradient(135deg, rgba(61, 139, 255, .18), rgba(168, 85, 247, .14) 50%, rgba(255, 61, 110, .12));
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 60px -20px rgba(0, 0, 0, .7);
  --head: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1200px;
  --header-h: 72px;
}

*, *::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: 400 17px/1.7 var(--body);
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: #fff; }
h1, h2, h3, h4 { font-family: var(--head); line-height: 1.15; margin: 0 0 .6em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.2rem, 5.4vw, 4.2rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.75rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1.1em; }
ul, ol { padding-left: 1.2em; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: #fff; color: #000; padding: 8px 14px; border-radius: 8px; z-index: 200; }
.skip:focus { left: 8px; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.grad-text { background: var(--grad-loop); -webkit-background-clip: text; background-clip: text; color: transparent; background-size: 200% 100%; animation: hue 8s linear infinite; }
@keyframes hue { to { background-position: 200% 0; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 .78rem/1 var(--head); letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 18px;
}
.subpx { display: inline-flex; gap: 3px; }
.subpx i { width: 4px; height: 14px; border-radius: 2px; display: block; }
.subpx i:nth-child(1) { background: var(--red); }
.subpx i:nth-child(2) { background: var(--green); }
.subpx i:nth-child(3) { background: var(--blue); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }

/* ---------- buttons ---------- */
.btn {
  --b: var(--cyan);
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px; font: 600 1rem/1 var(--head);
  color: #05060a; background: #fff; border: 0; cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.btn:hover { color: #05060a; transform: translateY(-2px); box-shadow: 0 10px 40px -8px rgba(34, 211, 238, .6); }
.btn-glow { background: var(--grad-loop); background-size: 200% 100%; color: #fff; animation: hue 6s linear infinite; }
.btn-glow:hover { color: #fff; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line-2); }
.btn-ghost:hover { color: #fff; border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(34, 211, 238, .12); }
.btn svg { width: 18px; height: 18px; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--header-h);
  background: rgba(6, 7, 12, .55); backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.site-header.scrolled { background: rgba(6, 7, 12, .85); border-bottom-color: var(--line); }
.site-header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--grad);
  transform: scaleX(var(--progress, 0)); transform-origin: left; opacity: .9;
}
.nav { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); font: 700 1.05rem/1.1 var(--head); }
.brand:hover { color: #fff; }
.brand-mark {
  width: 40px; height: 30px; border-radius: 7px; border: 2px solid var(--text); position: relative; flex: none;
  display: grid; place-items: center; overflow: hidden;
}
.brand-mark::before { content: ""; position: absolute; inset: 3px; border-radius: 3px; background: var(--grad-loop); background-size: 200% 100%; animation: hue 5s linear infinite; }
.brand-mark::after { content: ""; position: absolute; bottom: -7px; left: 50%; width: 14px; height: 4px; transform: translateX(-50%); }
.brand-mark b { position: relative; font: 800 .62rem/1 var(--head); color: #fff; letter-spacing: .04em; }
.brand small { display: block; font: 500 .7rem/1.3 var(--body); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a { display: block; padding: 10px 14px; border-radius: 10px; color: var(--muted); font: 500 .95rem/1 var(--body); transition: color .2s, background .2s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: #fff; background: rgba(255, 255, 255, .06); }
.nav-links .nav-cta a { color: #05060a; background: #fff; margin-left: 6px; }
.nav-links .nav-cta a:hover { background: var(--cyan); color: #05060a; }
.has-sub { position: relative; }
.sub-toggle { display: none; }
.sub {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 300px; list-style: none; margin: 0; padding: 8px;
  background: rgba(17, 20, 31, .97); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(6px); transition: .2s;
}
.has-sub:hover .sub, .has-sub:focus-within .sub { opacity: 1; visibility: visible; transform: none; }
.sub a { padding: 10px 12px; font-size: .92rem; }
.menu-btn {
  display: none; width: 46px; height: 46px; border-radius: 12px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .04);
  color: var(--text); cursor: pointer; position: relative; z-index: 120;
}
.menu-btn span { position: absolute; left: 12px; right: 12px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .3s, opacity .2s, top .3s; }
.menu-btn span:nth-child(1) { top: 15px; }
.menu-btn span:nth-child(2) { top: 22px; }
.menu-btn span:nth-child(3) { top: 29px; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { top: 22px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { top: 22px; transform: rotate(-45deg); }

@media (max-width: 960px) {
  /* backdrop-filter would make the header the containing block of the fixed menu panel */
  .site-header, .site-header.scrolled { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(6, 7, 12, .94); }
  .menu-btn { display: block; }
  .brand { position: relative; z-index: 120; }
  .nav-panel {
    position: fixed; inset: 0; z-index: 110; padding: calc(var(--header-h) + 12px) 20px 32px;
    background: radial-gradient(120% 60% at 100% 0, rgba(61, 139, 255, .18), transparent 60%), #06070c;
    overflow-y: auto; opacity: 0; visibility: hidden; transform: translateY(-12px); transition: opacity .3s, transform .3s, visibility 0s .3s;
  }
  .nav-panel.is-open { opacity: 1; visibility: visible; transform: none; transition: opacity .3s, transform .3s; }
  .nav-links { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-links > li { border-bottom: 1px solid var(--line); }
  .nav-links a { padding: 16px 6px; font: 600 1.15rem/1.2 var(--head); color: var(--text); background: none !important; }
  .nav-links .nav-cta { border: 0; margin-top: 18px; }
  .nav-links .nav-cta a { margin: 0; text-align: center; border-radius: 999px; padding: 16px; background: var(--grad) !important; color: #fff; }
  .has-sub { display: flex; flex-wrap: wrap; align-items: center; }
  .has-sub > a { flex: 1; }
  .sub-toggle {
    display: grid; place-items: center; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line); background: none; color: var(--text); cursor: pointer;
  }
  .sub-toggle svg { width: 18px; height: 18px; transition: transform .25s; }
  .sub-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
  .sub { position: static; flex-basis: 100%; min-width: 0; opacity: 1; visibility: visible; transform: none; display: none; background: none; border: 0; box-shadow: none; padding: 0 0 10px 10px; }
  .sub.is-open { display: block; }
  .has-sub:hover .sub { transform: none; }
  .sub a { padding: 10px 6px; font: 500 1rem/1.3 var(--body); color: var(--muted); }
}

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 96px; isolation: isolate; }
.hero-bg { position: absolute; inset: 0; z-index: -2; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .28; filter: saturate(1.2); transform: scale(1.08); animation: drift 24s ease-in-out infinite alternate; }
@keyframes drift { to { transform: scale(1.18) translate(-2%, -2%); } }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(60% 60% at 15% 30%, rgba(61, 139, 255, .25), transparent 60%),
              radial-gradient(50% 50% at 85% 70%, rgba(255, 61, 110, .18), transparent 60%),
              linear-gradient(180deg, rgba(6, 7, 12, .5), var(--bg) 92%);
}
.scanlines::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 1;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .025) 0 1px, transparent 1px 3px);
  mix-blend-mode: overlay;
}
.orb { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5; z-index: -1; animation: float 14s ease-in-out infinite; }
.orb.o1 { width: 340px; height: 340px; background: var(--blue); top: -80px; left: -100px; }
.orb.o2 { width: 260px; height: 260px; background: var(--red); bottom: -60px; right: 10%; animation-delay: -5s; }
.orb.o3 { width: 200px; height: 200px; background: var(--green); top: 30%; right: -60px; opacity: .3; animation-delay: -9s; }
@keyframes float { 50% { transform: translate(30px, -30px) scale(1.1); } }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { margin-bottom: 22px; }
.power-on { display: inline-block; animation: powerOn 1.2s cubic-bezier(.2, .8, .2, 1) both; transform-origin: center; }
@keyframes powerOn {
  0% { transform: scale(1, .004); filter: brightness(6); opacity: .2; }
  35% { transform: scale(1, .004); filter: brightness(6); opacity: 1; }
  60% { transform: scale(1, 1.06); filter: brightness(2); }
  100% { transform: none; filter: none; }
}
.hero .lead { margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; margin: 0; padding: 0; }
.hero-badges li { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; background: rgba(255, 255, 255, .05); border: 1px solid var(--line); font-size: .88rem; color: var(--muted); }
.hero-badges li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }

/* TV mockup with channel flipping */
.tv { position: relative; perspective: 1200px; }
.tv-frame {
  position: relative; aspect-ratio: 16 / 10; border-radius: 18px; padding: 12px; background: linear-gradient(145deg, #1d2132, #0a0c14);
  border: 1px solid var(--line-2); box-shadow: 0 40px 100px -30px rgba(61, 139, 255, .55), 0 0 0 1px rgba(255, 255, 255, .03) inset;
  transform: rotateY(-8deg) rotateX(4deg); transition: transform .6s;
}
.tv:hover .tv-frame { transform: rotateY(0) rotateX(0); }
.tv-screen { position: relative; width: 100%; height: 100%; border-radius: 8px; overflow: hidden; background: #000; }
.tv-screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .1s; }
.tv-screen img.on { opacity: 1; }
.tv-screen canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; pointer-events: none; mix-blend-mode: screen; }
.tv-screen.flip canvas { opacity: .85; }
.tv-screen.flip img.on { animation: roll .35s steps(4); }
@keyframes roll { 0% { transform: translateY(-6%) skewX(4deg); filter: hue-rotate(90deg) contrast(1.6); } 100% { transform: none; } }
.tv-screen .bars { position: absolute; inset: 0; display: grid; grid-template-columns: repeat(7, 1fr); transition: opacity .6s .9s; }
.tv-screen .bars i:nth-child(1) { background: #c0c0c0; } .tv-screen .bars i:nth-child(2) { background: #c0c000; }
.tv-screen .bars i:nth-child(3) { background: #00c0c0; } .tv-screen .bars i:nth-child(4) { background: #00c000; }
.tv-screen .bars i:nth-child(5) { background: #c000c0; } .tv-screen .bars i:nth-child(6) { background: #c00000; }
.tv-screen .bars i:nth-child(7) { background: #0000c0; }
.tv.ready .bars { opacity: 0; }
.tv-screen::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(0deg, rgba(0, 0, 0, .18) 0 1px, transparent 1px 3px); pointer-events: none; }
.tv-osd { position: absolute; top: 14px; right: 18px; z-index: 2; font: 700 1.1rem/1 "Space Grotesk", monospace; color: #7CFFB2; text-shadow: 0 0 8px #22e6a0; letter-spacing: .08em; }
.tv-stand { width: 34%; height: 14px; margin: 0 auto; background: linear-gradient(#1a1e2c, #0b0d15); border-radius: 0 0 12px 12px; transform: rotateX(4deg); }
.tv-led { position: absolute; bottom: 4px; left: 50%; width: 5px; height: 5px; border-radius: 50%; background: var(--red); box-shadow: 0 0 8px var(--red); transform: translateX(-50%); }
.tv-caption { margin-top: 18px; text-align: center; color: var(--dim); font-size: .85rem; }
.float-chip {
  position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 14px;
  background: rgba(17, 20, 31, .85); border: 1px solid var(--line-2); backdrop-filter: blur(10px); box-shadow: var(--shadow);
  font-size: .85rem; animation: float 7s ease-in-out infinite;
}
.float-chip strong { display: block; font: 700 1rem/1.1 var(--head); }
.float-chip .dot { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--line-2); }
.float-chip .dot svg { width: 18px; height: 18px; color: var(--cyan); }
.chip-a { left: -26px; bottom: 22%; }
.chip-b { right: -14px; top: -18px; animation-delay: -3s; }

/* ---------- marquee ---------- */
.marquee { border-block: 1px solid var(--line); background: var(--bg-2); overflow: hidden; padding: 22px 0; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; gap: 64px; width: max-content; animation: scroll 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee span { font: 700 1.5rem/1 var(--head); color: rgba(255, 255, 255, .28); letter-spacing: .02em; white-space: nowrap; transition: color .2s; }
.marquee span:hover { color: #fff; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- sections ---------- */
.section { padding: 104px 0; position: relative; }
.section-alt { background: var(--bg-2); }
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .lead { margin-inline: auto; }
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

/* spotlight cards */
.card {
  position: relative; padding: 30px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line);
  overflow: hidden; transition: transform .35s, border-color .35s; isolation: isolate;
}
.card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .35s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(34, 211, 238, .14), transparent 45%);
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px; z-index: -1;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(168, 85, 247, .9), rgba(61, 139, 255, .4) 40%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .35s;
}
.card:hover { transform: translateY(-4px); }
.card:hover::before, .card:hover::after { opacity: 1; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); margin-bottom: 0; }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 22px;
  background: var(--grad-soft); border: 1px solid var(--line-2);
}
.card .icon svg { width: 24px; height: 24px; color: var(--cyan); }
.card .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font: 600 .92rem/1 var(--head); }
.card .more svg { width: 16px; height: 16px; transition: transform .25s; }
.card:hover .more svg { transform: translateX(4px); }
.card-link { color: inherit; display: block; }
.card-link:hover { color: inherit; }

/* brand cards with photos */
.brand-card { padding: 0; display: flex; flex-direction: column; }
.brand-card .ph { aspect-ratio: 16 / 10; overflow: hidden; position: relative; }
.brand-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s; }
.brand-card:hover .ph img { transform: scale(1.07); }
.brand-card .ph::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(17, 20, 31, .1) 20%, rgba(17, 20, 31, .75) 70%, var(--surface)); }
.brand-card .ph b { text-shadow: 0 2px 16px rgba(0, 0, 0, .6); }
.brand-card .ph b { position: absolute; left: 22px; bottom: 14px; z-index: 1; font: 800 1.9rem/1 var(--head); letter-spacing: -.02em; }
.brand-card .body { padding: 8px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.brand-card .body p { flex: 1; }

/* split media */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.rev > :first-child { order: 2; }
.media { position: relative; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3.4; }
.media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(200deg, transparent 50%, rgba(6, 7, 12, .6)); }
.media-stack { position: relative; padding: 0 0 60px 60px; }
.media-stack .media.small { position: absolute; left: 0; bottom: 0; width: 46%; border: 4px solid var(--bg); }
.media-stack .media.small img { aspect-ratio: 1; }
.media-tag { position: absolute; z-index: 2; right: 18px; top: 18px; padding: 8px 14px; border-radius: 999px; background: rgba(6, 7, 12, .7); backdrop-filter: blur(8px); font: 600 .8rem/1 var(--head); border: 1px solid var(--line-2); }
.ticks { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 34px; color: var(--muted); }
.ticks li strong { color: var(--text); }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 22px; height: 22px; border-radius: 7px;
  background: rgba(34, 230, 160, .14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2322e6a0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 13px no-repeat;
  border: 1px solid rgba(34, 230, 160, .35);
}

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--surface); padding: 30px 24px; text-align: center; }
.stat b { display: block; font: 700 clamp(2.2rem, 4vw, 3rem)/1 var(--head); margin-bottom: 8px; }
.stat span { color: var(--muted); font-size: .92rem; }

/* symptom checker */
.checker { display: grid; grid-template-columns: 300px 1fr; gap: 26px; }
.checker-tabs { display: flex; flex-direction: column; gap: 8px; }
.checker-tabs button {
  text-align: left; padding: 16px 18px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface);
  color: var(--muted); font: 600 .98rem/1.3 var(--head); cursor: pointer; transition: .25s; display: flex; align-items: center; gap: 12px;
}
.checker-tabs button i { width: 10px; height: 10px; border-radius: 50%; background: var(--dim); flex: none; transition: .25s; }
.checker-tabs button:hover { color: #fff; border-color: var(--line-2); }
.checker-tabs button[aria-selected="true"] { color: #fff; background: var(--surface-2); border-color: rgba(34, 211, 238, .5); box-shadow: 0 0 0 4px rgba(34, 211, 238, .08); }
.checker-tabs button[aria-selected="true"] i { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.checker-panel {
  position: relative; padding: 36px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); overflow: hidden; min-height: 360px;
}
.checker-panel[hidden] { display: none; }
.checker-panel.anim { animation: panelIn .45s cubic-bezier(.2, .8, .2, 1); }
@keyframes panelIn { from { opacity: 0; transform: translateY(10px); filter: blur(4px); } }
.mini-tv { width: 160px; aspect-ratio: 16 / 10; border-radius: 10px; border: 5px solid #1f2335; float: right; margin: 0 0 18px 24px; position: relative; overflow: hidden; background: #000; }
.mini-tv .fx { position: absolute; inset: 0; }
.fx-nopicture { background: #020203; }
.fx-nopicture::after { content: "\266A"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--green); font-size: 1.6rem; animation: blink 1.2s infinite; }
.fx-lines { background: linear-gradient(90deg, #333 0 18%, #ff3d6e 18% 19%, #2a2a40 19% 46%, #22e6a0 46% 47%, #333 47% 71%, #3d8bff 71% 73%, #444 73%); }
.fx-nopower::after { content: ""; position: absolute; bottom: 6px; right: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--red); animation: blink 1s infinite; }
.fx-dim { background: radial-gradient(circle at 30% 50%, #333 0 20%, #0a0a0a 45%), #050505; }
.fx-flicker { background: linear-gradient(135deg, #3d8bff, #a855f7); animation: flick .18s steps(2) infinite; }
.fx-sound { background: linear-gradient(135deg, #1b3a5c, #3d8bff); }
.fx-sound::after { content: "\2715"; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font: 700 1.4rem/1 var(--head); }
.fx-smart { background: linear-gradient(135deg, #22d3ee, #22e6a0); }
.fx-smart::after { content: ""; position: absolute; left: 50%; top: 50%; width: 22px; height: 22px; margin: -11px; border: 3px solid rgba(255, 255, 255, .4); border-top-color: #fff; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes blink { 50% { opacity: .15; } }
@keyframes flick { 50% { filter: brightness(.35); } }
@keyframes spin { to { transform: rotate(360deg); } }
.checker-panel h3 { font-size: 1.6rem; }
.checker-panel dl { display: grid; gap: 14px; margin: 22px 0 26px; clear: both; }
.checker-panel dt { font: 600 .78rem/1 var(--head); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: 6px; }
.checker-panel dd { margin: 0; color: var(--muted); }

/* process timeline */
.timeline { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.timeline::before { content: ""; position: absolute; top: 27px; left: 6%; right: 6%; height: 2px; background: var(--line-2); }
.timeline::after { content: ""; position: absolute; top: 27px; left: 6%; height: 2px; width: calc(88% * var(--fill, 0)); background: var(--grad); transition: width .2s linear; box-shadow: 0 0 12px rgba(61, 139, 255, .8); }
.step { position: relative; z-index: 1; text-align: center; padding: 0 8px; }
.step .num {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 20px; display: grid; place-items: center; background: var(--bg);
  border: 2px solid var(--line-2); font: 700 1.2rem/1 var(--head); transition: .4s;
}
.step.lit .num { border-color: var(--cyan); box-shadow: 0 0 0 6px rgba(34, 211, 238, .12), 0 0 24px rgba(34, 211, 238, .5); color: var(--cyan); }
.step p { color: var(--muted); font-size: .95rem; }

/* comparison toggle (LED vs LCD) */
.compare { border-radius: 24px; background: var(--surface); border: 1px solid var(--line); padding: 34px; }
.seg { display: inline-flex; padding: 5px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); margin-bottom: 30px; position: relative; flex-wrap: wrap; }
.seg button { position: relative; z-index: 1; border: 0; background: none; color: var(--muted); padding: 11px 20px; border-radius: 999px; font: 600 .95rem/1 var(--head); cursor: pointer; transition: color .25s, background .25s; }
.seg button[aria-pressed="true"] { color: #05060a; background: #fff; }
.compare-body { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.panel-diagram { position: relative; aspect-ratio: 16 / 10; border-radius: 14px; background: #0a0c14; border: 1px solid var(--line-2); overflow: hidden; }
.panel-diagram .lcd { position: absolute; inset: 10% 8%; border-radius: 6px; background: linear-gradient(135deg, rgba(61, 139, 255, .25), rgba(168, 85, 247, .2)); border: 1px solid rgba(255, 255, 255, .2); transition: .5s; }
.panel-diagram .lamp { position: absolute; transition: .5s; border-radius: 4px; }
.panel-diagram[data-mode="ccfl"] .lamp { left: 10%; right: 10%; height: 5px; background: #fff7d6; box-shadow: 0 0 18px 4px rgba(255, 240, 180, .7); }
.panel-diagram[data-mode="edge"] .lamp { top: 12%; bottom: 12%; width: 5px; background: #e6f6ff; box-shadow: 0 0 18px 4px rgba(180, 220, 255, .8); }
.panel-diagram[data-mode="full"] .lamp { width: 8px; height: 8px; border-radius: 50%; background: #fff; box-shadow: 0 0 14px 4px rgba(200, 230, 255, .9); }
.panel-diagram[data-mode="ccfl"] .lcd { background: linear-gradient(180deg, rgba(255, 240, 200, .18), rgba(255, 240, 200, .08)); }
.panel-diagram[data-mode="edge"] .lcd { background: linear-gradient(90deg, rgba(180, 220, 255, .3), rgba(61, 139, 255, .06) 50%, rgba(180, 220, 255, .3)); }
.panel-diagram[data-mode="full"] .lcd { background: radial-gradient(circle at 30% 40%, rgba(255, 255, 255, .35), transparent 30%), radial-gradient(circle at 70% 60%, rgba(61, 139, 255, .4), transparent 35%), rgba(0, 0, 0, .4); }
.panel-diagram .label { position: absolute; left: 14px; bottom: 12px; font: 600 .78rem/1 var(--head); color: var(--muted); letter-spacing: .1em; text-transform: uppercase; }
.compare-copy h3 { font-size: 1.5rem; }
.meter { display: grid; grid-template-columns: 130px 1fr; gap: 10px 14px; align-items: center; margin-top: 18px; font-size: .9rem; color: var(--muted); }
.meter .bar { height: 8px; border-radius: 99px; background: var(--bg); overflow: hidden; }
.meter .bar i { display: block; height: 100%; width: var(--v, 0%); border-radius: inherit; background: var(--grad); transition: width .6s cubic-bezier(.2, .8, .2, 1); }

/* areas */
.area-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.area-group { padding: 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.area-group h3 { font-size: 1.05rem; color: var(--muted); letter-spacing: .04em; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chips a, .chips span {
  display: inline-block; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--text); font-size: .9rem; transition: .2s;
}
.chips a:hover { border-color: var(--cyan); background: rgba(34, 211, 238, .08); color: #fff; }
.chips span { color: var(--muted); border-style: dashed; }

/* image band */
.band { position: relative; min-height: 440px; display: grid; align-items: center; overflow: hidden; isolation: isolate; }
.band > img { position: absolute; inset: 0; width: 100%; height: 120%; object-fit: cover; z-index: -2; will-change: transform; }
.band::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(6, 7, 12, .92) 25%, rgba(6, 7, 12, .45)); }
.band h2 { max-width: 16ch; }
.band p { max-width: 52ch; color: #cfd5e4; }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 860px; }
.faq details { border-radius: 16px; background: var(--surface); border: 1px solid var(--line); transition: border-color .3s; }
.faq details[open] { border-color: rgba(34, 211, 238, .35); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 60px 22px 24px; font: 600 1.05rem/1.4 var(--head); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); font: 400 1.2rem/1 var(--body); transition: transform .3s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); color: var(--cyan); border-color: var(--cyan); }
.faq .ans { padding: 0 24px 22px; color: var(--muted); }
.faq .ans p:last-child { margin: 0; }

/* CTA */
.cta {
  position: relative; border-radius: 28px; padding: 64px; overflow: hidden; text-align: center; isolation: isolate;
  background: radial-gradient(80% 120% at 0 0, rgba(61, 139, 255, .35), transparent 60%), radial-gradient(80% 120% at 100% 100%, rgba(255, 61, 110, .3), transparent 60%), var(--surface);
  border: 1px solid var(--line-2);
}
.cta::before { content: ""; position: absolute; inset: 0; z-index: -1; background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .03) 0 1px, transparent 1px 40px), repeating-linear-gradient(0deg, rgba(255, 255, 255, .03) 0 1px, transparent 1px 40px); }
.cta h2 { max-width: 20ch; margin-inline: auto; }
.cta p { color: var(--muted); max-width: 56ch; margin: 0 auto 28px; }
.cta .hero-actions { justify-content: center; margin: 0; }

/* page hero (interior) */
.page-hero { position: relative; padding: 64px 0 72px; overflow: hidden; isolation: isolate; border-bottom: 1px solid var(--line); }
.page-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; opacity: .32; }
.page-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 80% at 10% 20%, rgba(61, 139, 255, .3), transparent 60%), linear-gradient(90deg, var(--bg) 20%, rgba(6, 7, 12, .55)); }
.page-hero h1 { display: block; font-size: clamp(2rem, 4.6vw, 3.4rem); max-width: 20ch; }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0 0 22px; font-size: .88rem; color: var(--dim); }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--dim); }
.crumbs a { color: var(--muted); }

/* prose + sidebar */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 56px; align-items: start; }
.prose h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.4em; }
.prose p, .prose li { color: #c9cfdd; }
.prose li { margin-bottom: .5em; }
.prose figure { margin: 34px 0; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); }
.prose figure img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.prose figcaption { padding: 12px 18px; font-size: .88rem; color: var(--dim); background: var(--surface); }
.prose table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: .95rem; display: block; overflow-x: auto; }
.prose th, .prose td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { font: 600 .85rem/1.3 var(--head); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.callout { padding: 22px 24px; border-radius: 16px; background: var(--grad-soft); border: 1px solid var(--line-2); margin: 28px 0; }
.callout p:last-child { margin: 0; }
.fault-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 24px 0; }
.fault { padding: 20px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); }
.fault h3 { margin: 0 0 6px; font-size: 1.02rem; }
.fault p { margin: 0; font-size: .95rem; color: var(--muted); }
.sidebar { position: sticky; top: calc(var(--header-h) + 24px); display: grid; gap: 18px; }
.side-card { padding: 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.side-card h2, .side-card h3 { font-size: 1.15rem; }
.side-card ul { list-style: none; padding: 0; margin: 0; }
.side-card li a { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .95rem; }
.side-card li:last-child a { border: 0; }
.side-card li a:hover, .side-card li a[aria-current="page"] { color: #fff; }
.side-cta { background: radial-gradient(100% 100% at 100% 0, rgba(168, 85, 247, .35), transparent 60%), var(--surface-2); border-color: var(--line-2); }
.side-cta p { color: var(--muted); font-size: .95rem; }
.side-cta .btn { width: 100%; justify-content: center; }

/* contact */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.info-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.info-list li { display: flex; gap: 16px; align-items: flex-start; padding: 20px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.info-list .icon { width: 44px; height: 44px; flex: none; border-radius: 12px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--line-2); }
.info-list svg { width: 20px; height: 20px; color: var(--cyan); }
.info-list b { display: block; font-family: var(--head); }
.info-list span, .info-list a { color: var(--muted); word-break: break-word; }
.form { padding: 34px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); display: grid; gap: 16px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: grid; gap: 8px; font: 600 .88rem/1 var(--head); color: var(--muted); }
.form input, .form select, .form textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--bg); color: var(--text);
  font: 400 1rem/1.4 var(--body); transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: 0; border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(34, 211, 238, .12); }
.form textarea { min-height: 130px; resize: vertical; }
.form .hp { position: absolute; left: -9999px; }
.form-note { font-size: .85rem; color: var(--dim); margin: 0; }
.alert { padding: 16px 18px; border-radius: 12px; border: 1px solid; margin-bottom: 8px; }
.alert-ok { border-color: rgba(34, 230, 160, .5); background: rgba(34, 230, 160, .08); }
.alert-err { border-color: rgba(255, 61, 110, .5); background: rgba(255, 61, 110, .08); }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-2); padding: 72px 0 30px; position: relative; overflow: hidden; }
.site-footer::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--grad); opacity: .7; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.site-footer h2 { font-size: .85rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 18px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.site-footer ul a { color: #c5cbda; font-size: .95rem; }
.site-footer ul a:hover { color: #fff; }
.foot-about p { color: var(--muted); font-size: .95rem; max-width: 36ch; }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; padding-top: 26px; border-top: 1px solid var(--line); color: var(--dim); font-size: .85rem; }
.foot-bottom a { color: var(--muted); }
.disclaimer { font-size: .8rem; color: var(--dim); max-width: 90ch; margin-top: 14px; }

/* reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2, .8, .2, 1), transform .8s cubic-bezier(.2, .8, .2, 1); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* back to top */
.to-top { position: fixed; right: 18px; bottom: 18px; z-index: 90; width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(17, 20, 31, .9); color: var(--text); display: grid; place-items: center; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: .3s; }
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top svg { width: 20px; height: 20px; }
.to-top:hover { border-color: var(--cyan); color: var(--cyan); }

/* 404 */
.nosignal { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 60px 0; }
.nosignal .tv-frame { width: min(520px, 100%); margin: 0 auto 36px; transform: none; }
.static { position: absolute; inset: 0; }

/* responsive */
@media (max-width: 1080px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}
@media (max-width: 960px) {
  .hero-grid, .split, .compare-body, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split.rev > :first-child { order: 0; }
  .g3 { grid-template-columns: repeat(2, 1fr); }
  .checker { grid-template-columns: 1fr; }
  .checker-tabs { flex-direction: row; overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
  .checker-tabs button { flex: none; scroll-snap-align: start; }
  .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .timeline::before, .timeline::after { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .tv-frame { transform: none; }
  .chip-a { left: 0; }
  .chip-b { right: 0; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  :root { --header-h: 64px; }
  .section { padding: 72px 0; }
  .hero { padding: 40px 0 64px; }
  .g2, .g3, .g4, .fault-grid, .form .row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta { padding: 40px 22px; }
  .compare, .checker-panel, .form { padding: 24px; }
  .mini-tv { float: none; margin: 0 0 18px; }
  .media-stack { padding: 0 0 40px 30px; }
  .float-chip { padding: 10px 12px; font-size: .78rem; }
  .chip-a { bottom: -14px; }
  .chip-b { right: 6px; top: -22px; }
  .brand small { display: none; }
  .meter { grid-template-columns: 100px 1fr; }
  .btn { padding: 14px 20px; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}
.panel-diagram .lamps { position: absolute; inset: 0; }
.panel-diagram .lcd { z-index: 1; backdrop-filter: blur(2px); }
.panel-diagram .label { z-index: 2; }