:root {
  color-scheme: dark;
  --bg: #101317;
  --panel: #171d24;
  --panel-strong: #202833;
  --text: #f4f7fb;
  --muted: #aeb8c6;
  --line: #344150;
  --accent: #38d6a8;
  --accent-2: #59a8ff;
  --warn: #f4c35f;
  --shadow: 0 22px 70px rgba(0, 0, 0, .35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(56, 214, 168, .14), transparent 34rem),
    linear-gradient(135deg, #101317 0%, #141a20 45%, #0f1318 100%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(16, 19, 23, .82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid rgba(56, 214, 168, .42);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(56, 214, 168, .22), rgba(89, 168, 255, .14));
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: .78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: .35rem;
}

.site-nav a,
.nav-toggle,
.button,
.band-controls button,
.logbook-toolbar button {
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 8px;
  background: rgba(255, 255, 255, .04);
  color: var(--text);
  text-decoration: none;
}

.site-nav a {
  padding: .55rem .85rem;
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  border-color: rgba(56, 214, 168, .45);
}

.nav-toggle {
  display: none;
  padding: .55rem .8rem;
}

.hero,
.section-grid,
.station-section,
.lab-section,
.logbook-section {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(340px, 1.1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 78px);
  padding: 5rem 0;
}

.eyebrow {
  margin: 0 0 .75rem;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 10ch;
  margin-bottom: 1.35rem;
  font-size: clamp(3.1rem, 8vw, 6.9rem);
  line-height: .88;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: .45rem;
  font-size: 1rem;
}

.hero-text,
.section-heading p,
.section-grid p,
.credential-list p,
.site-footer {
  color: var(--muted);
}

.hero-text {
  max-width: 58ch;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: .7rem 1rem;
  font-weight: 700;
}

.button.primary {
  background: var(--accent);
  color: #071311;
  border-color: transparent;
}

.button.secondary {
  color: var(--text);
}

.radio-console,
.transceiver-panel,
.schematic-card,
.scope-card,
.credential-list article,
.log-entry {
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .075), rgba(255, 255, 255, .025));
  box-shadow: var(--shadow);
}

.radio-console {
  padding: 1rem;
}

.console-top,
.meter-row,
.scope-head,
.log-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.console-top,
.meter-row {
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: .84rem;
}

.status-dot {
  color: var(--accent);
}

.frequency {
  display: flex;
  align-items: end;
  gap: .75rem;
  padding: 1.1rem 0 .8rem;
  font-family: "JetBrains Mono", monospace;
}

.frequency span,
.rig-screen strong {
  color: var(--accent);
  font-size: clamp(2rem, 5vw, 3.7rem);
  line-height: 1;
  text-shadow: 0 0 24px rgba(56, 214, 168, .35);
}

.frequency small {
  color: var(--muted);
}

canvas {
  display: block;
  width: 100%;
  max-width: 100%;
  border-radius: 8px;
}

.console-controls {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: .7rem;
  margin-top: 1rem;
}

.console-controls span,
.knob-grid span {
  min-height: 2.4rem;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 8px;
  background: linear-gradient(145deg, #252d36, #11161c);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: 2rem;
  padding: 4rem 0;
}

.credential-list {
  display: grid;
  gap: 1rem;
}

.credential-list article {
  padding: 1.2rem;
}

.credential-list span {
  color: var(--accent-2);
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
}

.station-section,
.lab-section,
.logbook-section {
  padding: 4rem 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.transceiver-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 1rem;
  padding: 1rem;
  background:
    linear-gradient(145deg, rgba(30, 38, 48, .98), rgba(11, 15, 20, .98)),
    repeating-linear-gradient(90deg, transparent, transparent 18px, rgba(255, 255, 255, .035) 19px);
}

.rig-screen {
  min-width: 0;
  padding: 1rem;
  border: 1px solid rgba(56, 214, 168, .28);
  border-radius: 8px;
  background: #07100f;
}

.rig-controls {
  display: grid;
  align-content: center;
  gap: 1.2rem;
}

.knob {
  aspect-ratio: 1;
  border-radius: 50%;
  border: 16px solid #2c3540;
  background: radial-gradient(circle, #141a20 0 36%, #3a4552 37% 40%, #101419 41%);
  box-shadow: inset 0 0 28px rgba(0, 0, 0, .65), 0 14px 34px rgba(0, 0, 0, .35);
}

.knob-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .55rem;
}

.band-controls,
.logbook-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1rem;
}

.band-controls button,
.logbook-toolbar button {
  cursor: pointer;
  padding: .55rem .85rem;
  color: var(--muted);
}

.band-controls button.active,
.logbook-toolbar button.active {
  background: rgba(56, 214, 168, .16);
  border-color: rgba(56, 214, 168, .55);
  color: var(--text);
}

.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr);
  gap: 1rem;
}

.schematic-card,
.scope-card {
  padding: 1.2rem;
}

.schematic {
  width: 100%;
  height: auto;
  margin-top: .5rem;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 8px;
  background: #eef5f0;
}

.schematic text {
  fill: #16222a;
  font: 600 17px "JetBrains Mono", monospace;
}

.wire,
.component,
.ground {
  fill: none;
  stroke: #16222a;
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.component {
  stroke: #126c55;
}

.scope-card {
  background: linear-gradient(145deg, rgba(25, 31, 38, .98), rgba(12, 16, 21, .98));
}

.scope-head span {
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
}

.scope-card label {
  display: block;
  margin-top: .85rem;
  color: var(--muted);
  font-size: .9rem;
}

.scope-card input {
  width: 100%;
  accent-color: var(--accent);
}

.logbook-list {
  display: grid;
  gap: .85rem;
  margin-top: 1rem;
}

.log-entry {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
}

.log-entry strong {
  font-family: "JetBrains Mono", monospace;
}

.log-entry p {
  margin: 0;
  color: var(--muted);
}

.badge {
  justify-self: end;
  padding: .3rem .55rem;
  border-radius: 999px;
  background: rgba(89, 168, 255, .16);
  color: #b8d9ff;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 4rem);
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .hero,
  .section-grid,
  .transceiver-panel,
  .lab-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 3rem;
  }

  h1 {
    max-width: 11ch;
  }

  .rig-controls {
    grid-template-columns: 180px 1fr;
  }
}

@media (max-width: 680px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: .75rem;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 8px;
    background: rgba(16, 19, 23, .96);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
  }

  .hero,
  .section-grid,
  .station-section,
  .lab-section,
  .logbook-section {
    width: min(100% - 1rem, 1180px);
  }

  h1 {
    font-size: 3.4rem;
  }

  .radio-console,
  .transceiver-panel,
  .schematic-card,
  .scope-card {
    padding: .75rem;
  }

  .frequency {
    display: block;
  }

  .frequency span,
  .rig-screen strong {
    font-size: 2rem;
  }

  .rig-controls {
    grid-template-columns: 1fr;
  }

  .knob {
    width: min(210px, 100%);
    margin: 0 auto;
  }

  .log-entry {
    grid-template-columns: 1fr;
  }

  .badge {
    justify-self: start;
  }

  .site-footer {
    display: block;
  }
}