/* ============================================================
   SKT Inc. — front-panel design system
   Dark anodized chassis, silkscreen mono labels, status LEDs.
   Amber = Wireless DMX · Green = Networking
   ============================================================ */

@font-face {
  font-family: "AF Pepsi";
  src: url("../fonts/AfPepsi.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #0e0f11;
  --bg-2: #141619;
  --bg-3: #1a1d21;
  --line: #26292f;
  --line-2: #33373e;
  --text: #e9e7e2;
  --muted: #9b9891;
  --amber: #ffb020;
  --amber-dim: #7a5510;
  --green: #52d97a;
  --green-dim: #1f5c34;
  --plate: #e2e1df;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Barlow", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Consolas", monospace;
  --logo: "AF Pepsi", "Barlow Condensed", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background:
    linear-gradient(rgba(38, 41, 47, .38) 1px, transparent 1px) 0 -1px / 100% 96px,
    linear-gradient(90deg, rgba(38, 41, 47, .22) 1px, transparent 1px) -1px 0 / 96px 100%,
    var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
ul, ol { list-style: none; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 22px; }

.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--amber); color: #000; padding: 8px 16px; font-family: var(--mono);
}
.skip:focus { left: 0; }

/* ---------- LEDs ---------- */

.led {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%;
  background: #3a3d43; border: 1px solid #000;
  vertical-align: baseline; flex: none;
}
.led-amber.on, .led-amber.blink { background: var(--amber); box-shadow: 0 0 7px 1px rgba(255, 176, 32, .8); }
.led-green.on, .led-green.blink, .led-green.blink2 { background: var(--green); box-shadow: 0 0 7px 1px rgba(82, 217, 122, .8); }
.led.blink { animation: blink 2.1s steps(1) infinite; }
.led.blink2 { animation: blink 1.3s steps(1) .4s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 47% { opacity: 1; } 50% { opacity: .25; } 62% { opacity: .25; } 65% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .led { animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- header ---------- */

.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 15, 17, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.head-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }

.logo {
  font-family: var(--logo);
  font-size: 30px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: .02em;
  line-height: 1;
}

.site-nav { display: flex; gap: 6px; }
.site-nav a {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; letter-spacing: .09em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  padding: 8px 14px; border: 1px solid transparent;
}
.site-nav a:hover { color: var(--text); border-color: var(--line-2); }
.site-nav a[aria-current="page"] { color: var(--text); border-color: var(--line-2); background: var(--bg-2); }
.site-nav .led { width: 7px; height: 7px; }
.site-nav a[href="wireless.html"]:hover .led, .site-nav a[href="wireless.html"][aria-current] .led { background: var(--amber); box-shadow: 0 0 6px rgba(255,176,32,.8); }
.site-nav a[href="networking.html"]:hover .led, .site-nav a[href="networking.html"][aria-current] .led { background: var(--green); box-shadow: 0 0 6px rgba(82,217,122,.8); }

.nav-btn { display: none; }

/* ---------- type helpers ---------- */

.kicker {
  font-family: var(--mono); font-size: 13px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 14px;
}
.mono-tag { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--muted); }
.mono-tag .led { margin-right: 8px; }

h1, h2, h3 { font-family: var(--display); text-transform: uppercase; line-height: 1.02; font-weight: 700; }

.lede { color: var(--muted); font-size: 19px; max-width: 56ch; }

.sec-label {
  display: flex; align-items: center; gap: 14px;
  font-size: 26px; letter-spacing: .04em; color: var(--text);
  margin-bottom: 26px;
}
.sec-label span {
  font-family: var(--mono); font-size: 12px; font-weight: 400; color: var(--muted);
  border: 1px solid var(--line-2); padding: 3px 8px;
}
.sec-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.section { padding: 64px 0; }

/* ---------- buttons ---------- */

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-block; text-decoration: none;
  font-family: var(--mono); font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
  padding: 13px 24px; border: 1px solid var(--line-2); color: var(--text);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-amber { background: var(--amber); border-color: var(--amber); color: #16110a; font-weight: 500; }
.btn-amber:hover { box-shadow: 0 0 22px rgba(255, 176, 32, .35); }
.btn-green { background: transparent; border-color: var(--green); color: var(--green); }
.btn-green:hover { box-shadow: 0 0 22px rgba(82, 217, 122, .25); }
.btn-ghost:hover { border-color: var(--text); }

/* ---------- hero ---------- */

.hero { padding: 84px 0 0; }
.hero h1 { font-size: clamp(48px, 7.5vw, 96px); margin: 12px 0 24px; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero .lede { font-size: 21px; max-width: 62ch; }

.plate {
  background: var(--plate);
  border: 1px solid var(--line-2);
  padding: 10px;
  position: relative;
}
.plate img { width: 100%; }
/* corner screws */
.plate::before, .plate::after,
.card-photo::before, .card-photo::after {
  content: ""; position: absolute; width: 5px; height: 5px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #b9b9b9, #55565a 70%);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .35);
  z-index: 2;
}
.plate::before { top: 4px; left: 4px; }
.plate::after { bottom: 4px; right: 4px; }

/* panel bar under hero */
.panelbar {
  margin-top: 56px;
  display: flex; align-items: center; gap: 26px;
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  padding: 14px 20px;
}
.pb-cell {
  display: flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--muted);
}
.pb-fill { flex: 1; height: 1px; background: var(--line); }
.pb-tags { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--muted); }

/* ---------- category tiles ---------- */

.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.tile {
  text-decoration: none; border: 1px solid var(--line-2); background: var(--bg-2);
  display: flex; flex-direction: column; overflow: hidden;
  transition: border-color .15s ease, transform .15s ease;
}
.tile:hover { transform: translateY(-3px); }
.tile.accent-amber:hover { border-color: var(--amber); }
.tile.accent-green:hover { border-color: var(--green); }
.tile figure { background: var(--plate); border-bottom: 1px solid var(--line-2); }
.tile-body { padding: 24px 26px 28px; }
.tile-body h3 { font-size: 32px; margin-bottom: 10px; }
.accent-amber .tile-body h3 { color: var(--amber); }
.accent-green .tile-body h3 { color: var(--green); }
.tile-body p { color: var(--muted); font-size: 16px; }
.tile-link {
  display: inline-block; margin-top: 16px;
  font-family: var(--mono); font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
}
.accent-amber .tile-link { color: var(--amber); }
.accent-green .tile-link { color: var(--green); }

/* ---------- product cards ---------- */

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  text-decoration: none; border: 1px solid var(--line-2); background: var(--bg-2);
  display: flex; flex-direction: column;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { transform: translateY(-3px); }
.card.accent-amber:hover { border-color: var(--amber); }
.card.accent-green:hover { border-color: var(--green); }
.card-photo { background: var(--plate); border-bottom: 1px solid var(--line-2); position: relative; }
.card-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-body h3 { font-size: 25px; letter-spacing: .02em; }
.card:hover.accent-amber h3 { color: var(--amber); }
.card:hover.accent-green h3 { color: var(--green); }
.card-body p { color: var(--muted); font-size: 15px; flex: 1; }

.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chips li {
  font-family: var(--mono); font-size: 11px; letter-spacing: .06em;
  color: var(--muted); border: 1px solid var(--line-2); padding: 3px 9px;
  background: var(--bg-3);
}
.chips.big li { font-size: 12px; padding: 5px 11px; }
.accent-amber .chips.big li { color: var(--amber); border-color: var(--amber-dim); }
.accent-green .chips.big li { color: var(--green); border-color: var(--green-dim); }

/* ---------- why band ---------- */

.band { background: linear-gradient(180deg, var(--bg-2), transparent); border-block: 1px solid var(--line); }
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why article { border: 1px solid var(--line-2); background: var(--bg); padding: 26px; }
.why h3 { font-size: 24px; margin-bottom: 12px; display: flex; align-items: center; gap: 11px; }
.why p { color: var(--muted); font-size: 15.5px; }

.cta-band {
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
  border: 1px solid var(--line-2); background: var(--bg-2); padding: 36px 40px;
}
.cta-band h2 { font-size: 32px; margin-bottom: 8px; }
.cta-band p { color: var(--muted); }

/* ---------- page head / breadcrumbs ---------- */

.page-head { padding: 44px 0 0; }
.page-head h1 { font-size: clamp(40px, 5.5vw, 64px); margin: 14px 0 18px; }
.page-head.accent-amber h1 { color: var(--amber); }
.page-head.accent-green h1 { color: var(--green); }
.page-head .note {
  margin-top: 18px; max-width: 72ch;
  font-size: 15px; color: var(--muted);
  border: 1px solid var(--line-2); background: var(--bg-2); padding: 12px 16px;
}
.page-head .note .led { margin-right: 10px; }

.crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.crumbs li + li::before { content: "/"; color: var(--line-2); margin-right: 6px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--text); }
.crumbs span { color: var(--text); }

/* ---------- product page ---------- */

.product { padding-top: 36px; }
.product-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: start; }

.product-info h1 { font-size: clamp(40px, 5vw, 58px); margin: 4px 0 14px; }
.accent-amber .product-info h1 { color: var(--amber); }
.accent-green .product-info h1 { color: var(--green); }
.product-info .lede { font-size: 18px; margin-bottom: 18px; }
.product-info .chips { margin-bottom: 22px; }
.product-info .desc { color: var(--text); font-size: 16.5px; }

.g-main { margin-bottom: 10px; }
.g-thumbs { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.g-thumb {
  border: 1px solid var(--line-2); background: var(--plate); padding: 2px; cursor: pointer;
  opacity: .55; transition: opacity .12s ease, border-color .12s ease;
}
.g-thumb:hover { opacity: .85; }
.g-thumb.is-active { opacity: 1; }
.accent-amber .g-thumb.is-active { border-color: var(--amber); }
.accent-green .g-thumb.is-active { border-color: var(--green); }

.detail .sec-label { margin-top: 52px; }
.detail .sec-label:first-child { margin-top: 0; }

.features { columns: 2; column-gap: 52px; }
.features li {
  position: relative; padding: 10px 0 10px 26px; color: var(--text); font-size: 15.5px;
  border-bottom: 1px solid var(--line);
  break-inside: avoid;
}
.features li::before {
  content: ""; position: absolute; left: 2px; top: 17px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--amber); box-shadow: 0 0 6px rgba(255, 176, 32, .7);
}
.accent-green .features li::before { background: var(--green); box-shadow: 0 0 6px rgba(82, 217, 122, .7); }

.specs { width: 100%; border-collapse: collapse; font-size: 15px; }
.specs th, .specs td { text-align: left; padding: 10px 14px; border: 1px solid var(--line); vertical-align: top; }
.specs th { font-family: var(--mono); font-size: 12px; letter-spacing: .07em; text-transform: uppercase; color: var(--muted); font-weight: 400; width: 38%; background: var(--bg-2); }

.kit { display: flex; flex-wrap: wrap; gap: 10px 44px; }
.kit li {
  font-family: var(--mono); font-size: 13.5px; padding-left: 22px; position: relative;
  color: var(--text);
}
.kit li::before { content: "▸"; position: absolute; left: 2px; color: var(--muted); }

/* product page downloads */
.dl-mini li {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  padding: 12px 2px; border-bottom: 1px solid var(--line);
}
.dl-mini a {
  font-family: var(--mono); font-size: 14px; letter-spacing: .03em;
  color: var(--text); text-decoration: none;
  padding-left: 24px; position: relative;
}
.dl-mini a::before { content: "↓"; position: absolute; left: 2px; color: var(--amber); }
.accent-green .dl-mini a::before { color: var(--green); }
.dl-mini a:hover { color: var(--amber); }
.accent-green .dl-mini a:hover { color: var(--green); }
.dl-meta { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }
.dl-note { margin-top: 16px; font-size: 14px; color: var(--muted); }
.dl-note a { color: var(--text); }

/* ---------- explainer (networking EEE) ---------- */

.explainer {
  margin-top: 48px; border: 1px solid var(--green-dim);
  background: linear-gradient(180deg, rgba(82, 217, 122, .05), transparent);
  padding: 32px 36px;
}
.explainer h2 { font-family: var(--display); text-transform: uppercase; font-size: 30px; color: var(--green); margin-bottom: 14px; }
.explainer p { color: var(--muted); max-width: 78ch; }
.explainer p + p { margin-top: 12px; }
.explainer strong { color: var(--text); }

/* ---------- contact ---------- */

.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.ccard {
  text-decoration: none; border: 1px solid var(--line-2); background: var(--bg-2);
  padding: 26px 28px; display: flex; flex-direction: column; gap: 8px;
  transition: border-color .15s ease, transform .15s ease;
}
.ccard:hover { border-color: var(--amber); transform: translateY(-2px); }
.ccard-label { font-family: var(--mono); font-size: 12px; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); display: flex; align-items: center; gap: 9px; }
.ccard-value { font-family: var(--display); font-size: 28px; text-transform: uppercase; letter-spacing: .02em; }
.ccard-note { color: var(--muted); font-size: 14px; }

/* ---------- downloads ---------- */

.btn-ds .ds-ext {
  font-size: 10px; padding: 2px 6px; margin-left: 8px;
  border: 1px solid var(--line-2); color: var(--muted); vertical-align: 1px;
}
.dl-section { padding: 40px 0 8px; }
.dl-list { border-top: 1px solid var(--line); }
.dl-row {
  display: flex; align-items: center; gap: 18px;
  padding: 18px 6px; border-bottom: 1px solid var(--line);
}
.dl-led { flex: none; display: flex; }
.dl-info { flex: 1; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.dl-name {
  font-family: var(--display); font-size: 22px; text-transform: uppercase;
  letter-spacing: .02em; text-decoration: none;
}
.dl-row.accent-amber .dl-name:hover { color: var(--amber); }
.dl-row.accent-green .dl-name:hover { color: var(--green); }
.dl-kicker { color: var(--muted); font-size: 14px; }
@media (max-width: 560px) {
  .dl-row { flex-wrap: wrap; }
  .dl-row .btn { margin-left: 21px; }
}

/* ---------- 404 ---------- */

.nf { padding: 110px 0; }
.nf h1 { font-size: clamp(44px, 6vw, 76px); margin: 10px 0 16px; }

/* ---------- footer ---------- */

.site-foot { border-top: 1px solid var(--line); margin-top: 40px; background: var(--bg-2); }
.foot-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 34px;
  padding: 52px 22px 40px;
}
.foot-brand .logo { font-size: 26px; }
.foot-brand p { color: var(--muted); font-size: 14.5px; margin-top: 12px; max-width: 34ch; }
.site-foot h2 { font-family: var(--mono); font-size: 12px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.site-foot ul li { margin-bottom: 8px; }
.site-foot ul a { color: var(--text); text-decoration: none; font-size: 15px; }
.site-foot ul a:hover { color: var(--amber); }
.foot-contact li { color: var(--muted); font-size: 15px; }
.foot-bar {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  border-top: 1px solid var(--line); padding-top: 18px; padding-bottom: 22px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--muted);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1000px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .why { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 880px) {
  .hero { padding-top: 48px; }
  .product-grid { grid-template-columns: 1fr; gap: 30px; }
  .features { columns: 1; }
  .tiles { grid-template-columns: 1fr; }
  .panelbar { margin-top: 36px; gap: 16px; }
  .pb-tags { display: none; }
  .cta-band { flex-direction: column; align-items: flex-start; }

  /* mobile nav */
  .nav-btn {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 46px; height: 46px; padding: 0 10px;
    background: none; border: 1px solid var(--line-2); cursor: pointer;
  }
  .nav-btn span { display: block; height: 2px; background: var(--text); transition: transform .18s ease, opacity .18s ease; }
  .nav-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .site-nav {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line-2);
    padding: 10px 22px 18px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 15px 6px; border: 0; border-bottom: 1px solid var(--line); font-size: 15px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .section { padding: 44px 0; }
  .grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 26px; }
  .g-thumbs { grid-template-columns: repeat(4, 1fr); }
  .lede { font-size: 17px; }
  .cta-band { padding: 26px 24px; }
  .explainer { padding: 24px 20px; }
  .sec-label { font-size: 22px; }
}