:root {
  --bg: #06100a;
  --bg-deep: #030805;
  --green: #8dff72;
  --green-soft: #b7ff9f;
  --green-dim: #4f7254;
  --line: rgba(141,255,114,.20);
  --text: #dff9d8;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 45%, rgba(141,255,114,.08), transparent 34%),
    linear-gradient(180deg, #08140d 0%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    linear-gradient(rgba(141,255,114,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141,255,114,.045) 1px, transparent 1px);
  background-size: 40px 40px;
}

.landing {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 28px clamp(22px, 4vw, 58px) 24px;
  isolation: isolate;
}

.scanlines {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: .15;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,.035) 0,
    rgba(255,255,255,.035) 1px,
    transparent 1px,
    transparent 4px
  );
  mix-blend-mode: soft-light;
}

.topbar,
.footerline {
  position: relative;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: clamp(.68rem, 1.2vw, .82rem);
  color: var(--green-dim);
}

.topbar {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  color: var(--text);
  font-weight: 700;
}

.brand-mark span { color: var(--green); }

.top-status {
  display: flex;
  align-items: center;
  gap: 9px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px rgba(141,255,114,.85);
  animation: pulse 2.2s ease-in-out infinite;
}

.hero {
  position: relative;
  z-index: 2;
  align-self: center;
  width: min(100%, 1280px);
  padding: 7vh 0 8vh;
}

.overline {
  margin: 0 0 20px;
  color: var(--green);
  letter-spacing: .24em;
  font-size: clamp(.68rem, 1.25vw, .9rem);
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 1100px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(3.9rem, 10.5vw, 10.8rem);
  line-height: .82;
  letter-spacing: -.07em;
  font-weight: 900;
  text-transform: uppercase;
  text-shadow: 0 0 34px rgba(141,255,114,.08);
}

h1 span {
  display: block;
  margin-top: .08em;
  color: transparent;
  -webkit-text-stroke: clamp(1px, .11vw, 2px) var(--green-soft);
  text-shadow: 0 0 38px rgba(141,255,114,.12);
}

.frequency-line {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  width: min(760px, 88vw);
  margin-top: clamp(35px, 6vh, 72px);
}

.frequency-line span {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green));
  opacity: .8;
}

.frequency-line span:last-child {
  background: linear-gradient(90deg, var(--green), transparent);
}

.frequency-line i {
  width: 9px;
  height: 9px;
  border: 1px solid var(--green);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(141,255,114,.5);
}

.holding {
  margin: 18px 0 0;
  color: var(--green-dim);
  letter-spacing: .16em;
  font-size: clamp(.68rem, 1.2vw, .82rem);
  text-transform: uppercase;
}

.holding span {
  color: var(--green);
  animation: blink 1.05s steps(1) infinite;
}

.signal-field {
  position: absolute;
  right: 0;
  top: 50%;
  width: min(42vw, 520px);
  aspect-ratio: 1;
  transform: translateY(-50%);
  opacity: .19;
  pointer-events: none;
}

.wave {
  position: absolute;
  inset: 50%;
  border: 1px solid var(--green);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.wave-a { width: 26%; height: 26%; }
.wave-b { width: 52%; height: 52%; }
.wave-c { width: 82%; height: 82%; }

.signal-field::before,
.signal-field::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--green);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 18px rgba(141,255,114,.5);
}

.signal-field::before { width: 1px; height: 100%; }
.signal-field::after { width: 100%; height: 1px; }

.footerline {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

@keyframes pulse {
  0%, 100% { opacity: .45; }
  50% { opacity: 1; }
}

@keyframes blink {
  0%, 48% { opacity: 1; }
  49%, 100% { opacity: 0; }
}

@media (max-width: 720px) {
  .landing { padding-inline: 18px; }
  .topbar, .footerline { letter-spacing: .07em; }
  .top-status { color: var(--green); }
  .hero { padding: 10vh 0; }
  .signal-field { width: 76vw; right: -33vw; opacity: .13; }
  h1 { font-size: clamp(3.25rem, 17vw, 6rem); line-height: .86; }
  .footerline span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .status-dot, .holding span { animation: none; }
}