/* =========================================================================
   NextWave Digital — static site stylesheet
   Theme: broadcast console / signal spectrum.
   Two accent frequencies: amber (Digital TV) and cyan (Digital Radio).
   ========================================================================= */

:root{
  --bg:        #0d1b24;
  --bg-deep:   #091319;
  --panel:     #12283340;
  --panel-solid: #142b36;
  --border:    #234a5c;
  --border-soft: #1b3844;
  --text:      #eaf2f5;
  --text-muted:#93aebb;
  --text-dim:  #6c8794;

  --amber:      #f2a63d;
  --amber-soft: rgba(242,166,61,.13);
  --amber-line: rgba(242,166,61,.4);

  --cyan:       #4fd3c4;
  --cyan-soft:  rgba(79,211,196,.13);
  --cyan-line:  rgba(79,211,196,.4);

  --accent:      var(--amber);
  --accent-soft: var(--amber-soft);
  --accent-line: var(--amber-line);

  --radius: 10px;
  --maxw: 1120px;

  --display: 'Oswald', 'Arial Narrow', sans-serif;
  --body: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
}

#digital-tv{
  --accent: var(--amber);
  --accent-soft: var(--amber-soft);
  --accent-line: var(--amber-line);
}
#digital-radio{
  --accent: var(--cyan);
  --accent-soft: var(--cyan-soft);
  --accent-line: var(--cyan-line);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img,svg{ display:block; max-width:100%; }

a{ color: inherit; text-decoration:none; }

h1,h2,h3{
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: .02em;
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 .5em;
}

h1{ font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 700; }
h2{ font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3{ font-size: 1.05rem; letter-spacing:.08em; color: var(--accent); }

p{ margin: 0 0 1em; color: var(--text-muted); max-width: 640px; }

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color: var(--accent);
  margin-bottom: 1.1em;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px;
  background: var(--accent);
  display:inline-block;
}

/* ---------- header / nav ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(9,19,25,.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 76px;
}
.brand{
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  display:flex; flex-direction:column; line-height:1.05;
}
.brand span{
  font-family: var(--mono);
  font-size:.58rem;
  letter-spacing:.28em;
  color: var(--text-dim);
  text-transform:uppercase;
  font-weight:400;
  margin-top:3px;
}
.brand b{ background:linear-gradient(90deg,var(--amber),var(--cyan)); -webkit-background-clip:text; background-clip:text; color:transparent; }

nav.main-nav ul{
  display:flex; gap: 2.2rem;
  list-style:none; margin:0; padding:0;
}
nav.main-nav a{
  font-family: var(--mono);
  font-size:.78rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color: var(--text-muted);
  padding: 6px 0 10px;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
nav.main-nav a:hover{ color: var(--text); }
nav.main-nav a[aria-current="page"]{
  color: var(--text);
  border-color: var(--accent);
}

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--border);
  color: var(--text); border-radius:6px;
  width:40px; height:36px;
  font-size: 1.1rem;
  cursor:pointer;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding: 96px 0 64px;
  overflow:hidden;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(circle at 15% 20%, var(--accent-soft), transparent 45%),
    var(--bg);
}
.hero .wrap{ position:relative; z-index:2; }
.hero-lede{ max-width: 620px; }
.hero p.sub{ font-size:1.05rem; }

/* spectrum bars — signature signal motif */
.spectrum{
  display:flex;
  align-items:flex-end;
  gap:3px;
  height: 64px;
  margin: 28px 0 0;
  opacity:.9;
}
.spectrum span{
  flex:1;
  display:block;
  background: linear-gradient(180deg, var(--amber), var(--cyan));
  border-radius: 2px 2px 0 0;
  transform-origin: bottom;
  animation: pulse 2.6s ease-in-out infinite;
}
.spectrum.mini{ height:34px; margin:0; }
@keyframes pulse{
  0%,100%{ transform: scaleY(.6); }
  50%{ transform: scaleY(1); }
}
@media (prefers-reduced-motion: reduce){
  .spectrum span{ animation: none; }
  html{ scroll-behavior:auto; }
}

/* ---------- sections ---------- */
.section{ padding: 72px 0; }
.section.alt{ background: var(--bg-deep); }
.section-head{ max-width: 640px; margin-bottom: 2.6rem; }

.grid-2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items:center;
}
@media (max-width: 860px){
  .grid-2{ grid-template-columns: 1fr; gap:2.4rem; }
}

/* cards on the homepage */
.card-row{ display:grid; grid-template-columns:1fr 1fr; gap:1.6rem; }
@media (max-width:760px){ .card-row{ grid-template-columns:1fr; } }

.card{
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  background: linear-gradient(180deg, var(--panel-solid), var(--bg-deep));
  transition: border-color .2s, transform .2s;
}
.card:hover{ transform: translateY(-3px); }
.card.tv{ border-color: var(--amber-line); }
.card.tv:hover{ border-color: var(--amber); }
.card.radio{ border-color: var(--cyan-line); }
.card.radio:hover{ border-color: var(--cyan); }

.card .tag{
  font-family:var(--mono); font-size:.68rem; letter-spacing:.18em;
  text-transform:uppercase; color: var(--text-dim); margin-bottom:.8rem; display:block;
}
.card.tv .tag{ color: var(--amber); }
.card.radio .tag{ color: var(--cyan); }

.card-link{
  display:inline-flex; align-items:center; gap:.5em;
  font-family: var(--mono); font-size:.78rem; letter-spacing:.08em;
  text-transform:uppercase; margin-top:1rem;
}
.card.tv .card-link{ color: var(--amber); }
.card.radio .card-link{ color: var(--cyan); }
.card-link::after{ content:"→"; transition: transform .15s; }
.card:hover .card-link::after{ transform: translateX(4px); }

/* schematic panel */
.schematic{
  border:1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(var(--border-soft) 1px, transparent 1px) 0 0/100% 24px,
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px) 0 0/24px 100%,
    var(--bg-deep);
  padding: 1.4rem;
}
.schematic svg{ width:100%; height:auto; }
.schematic .cap{
  display:flex; justify-content:space-between;
  font-family: var(--mono); font-size:.66rem; letter-spacing:.12em;
  text-transform:uppercase; color: var(--text-dim);
  margin-top: .9rem;
}

/* connections legend + feature chips */
.legend{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: .55rem 1.6rem;
  margin: 0 0 1.8rem;
  padding:0; list-style:none;
}
@media (max-width:520px){ .legend{ grid-template-columns:1fr; } }
.legend li{
  display:flex; align-items:baseline; gap:.7em;
  font-size:.92rem; color: var(--text);
  border-bottom: 1px dashed var(--border-soft);
  padding-bottom:.5rem;
}
.legend .num{
  font-family: var(--mono); font-size:.72rem;
  color: var(--accent);
  border:1px solid var(--accent-line);
  border-radius:50%;
  width:1.6em; height:1.6em;
  display:inline-flex; align-items:center; justify-content:center;
  flex-shrink:0;
}

.chip-list{ display:flex; flex-wrap:wrap; gap:.55rem; padding:0; list-style:none; margin:0; }
.chip-list li{
  font-family: var(--mono); font-size:.72rem; letter-spacing:.03em;
  color: var(--text-muted);
  border:1px solid var(--border);
  border-radius: 999px;
  padding:.45em .95em;
}

.bullets{ list-style:none; padding:0; margin:0 0 1.4rem; }
.bullets li{
  position:relative; padding-left:1.4em; margin-bottom:.6em;
  color: var(--text-muted);
}
.bullets li::before{
  content:"";
  position:absolute; left:0; top:.55em;
  width:8px; height:2px;
  background: var(--accent);
}

/* callout / cross-link band */
.callout{
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 2rem;
  display:flex; align-items:center; justify-content:space-between; gap:1.4rem;
  background: var(--panel-solid);
  flex-wrap:wrap;
}
.callout p{ margin:0; color: var(--text-muted); max-width:520px; }

.btn{
  display:inline-flex; align-items:center; gap:.6em;
  font-family: var(--mono); font-size:.78rem; letter-spacing:.08em;
  text-transform:uppercase;
  padding: .85em 1.5em;
  border-radius: 6px;
  border: 1px solid var(--accent);
  color: var(--bg);
  background: var(--accent);
  white-space:nowrap;
  transition: opacity .15s;
}
.btn:hover{ opacity:.85; }
.btn.ghost{
  background: transparent;
  color: var(--accent);
}

/* product title block */
.product-kicker{
  font-family: var(--mono); color: var(--text-dim);
  font-size:.8rem; letter-spacing:.1em; text-transform:uppercase;
  margin-bottom:.4rem;
}

/* footer */
.site-footer{
  border-top: 1px solid var(--border-soft);
  padding: 40px 0;
  background: var(--bg-deep);
}
.footer-row{
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap:wrap; gap:1rem;
}
.site-footer p{ margin:0; font-size:.8rem; color: var(--text-dim); }
.footer-links{ display:flex; align-items:center; gap:1.6rem; list-style:none; padding:0; margin:0; flex-wrap:wrap; }
.footer-links a{ font-family:var(--mono); font-size:.75rem; letter-spacing:.08em; text-transform:uppercase; color:var(--text-muted); }
.footer-links a:hover{ color:var(--text); }
.footer-links .divider{ color: var(--border); }
.footer-fine{
  margin: 1.2rem 0 0;
  font-size: .74rem;
  color: var(--text-dim);
}

/* inter-section wayfinding */
.section-jump{
  text-align:center;
  margin: 3.2rem 0 0;
}
.section-jump a{
  font-family: var(--mono); font-size:.78rem; letter-spacing:.1em;
  text-transform:uppercase; color: var(--accent);
  border-bottom: 1px solid var(--accent-line);
  padding-bottom: 3px;
}

/* mobile nav */
@media (max-width: 720px){
  .nav-toggle{ display:inline-flex; align-items:center; justify-content:center; }
  nav.main-nav{
    position:fixed; inset: 76px 0 0 0;
    background: var(--bg);
    transform: translateX(100%);
    transition: transform .25s ease;
    padding: 2rem 0;
    z-index: 40;
  }
  nav.main-nav.open{ transform: translateX(0); }
  nav.main-nav ul{ flex-direction:column; gap:0; padding:0 24px; }
  nav.main-nav a{ display:block; padding:1rem 0; border-bottom:1px solid var(--border-soft); }
}

:focus-visible{ outline: 2px solid var(--accent); outline-offset:2px; }