:root {
  color-scheme: dark;
  --ink: #edf5ee;
  --muted: #a9b7ae;
  --quiet: #718177;
  --night: #06110c;
  --panel: rgba(10, 27, 18, 0.82);
  --line: rgba(230, 245, 232, 0.14);
  --green: #a8e46b;
  --orange: #ffa755;
  --red: #ff7e67;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at 82% 5%, rgba(94, 149, 83, 0.16), transparent 27rem),
    linear-gradient(145deg, #06110c, #0a1911 52%, #060c09);
}
body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  opacity: 0.18;
  background-image: radial-gradient(rgba(230, 255, 233, 0.24) 0.6px, transparent 0.6px);
  background-size: 6px 6px;
  content: "";
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
h1, h2, h3, p { margin-top: 0; }

.app-shell {
  width: min(1000px, calc(100% - 32px));
  margin: auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 70px;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-size: 0.98rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}
.top-links {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}
.top-links a:hover,
.top-links a:focus-visible,
footer a:hover,
footer a:focus-visible {
  color: var(--green);
  outline: none;
}

.hero {
  padding: 40px 0 24px;
}
.compact-hero {
  padding: 34px 0 20px;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
h1 {
  max-width: 720px;
  margin-bottom: 14px;
  font-size: clamp(2.8rem, 6.4vw, 4.8rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
}
h2 {
  margin-bottom: 0;
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}
h3 { margin-bottom: 0; }
.hero-text {
  max-width: 640px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
  line-height: 1.62;
}
.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 900;
  transition: 0.18s;
}
.button:hover { transform: translateY(-1px); }
.primary {
  color: var(--night);
  background: var(--green);
}
.secondary {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.035);
}
.secondary:hover {
  border-color: rgba(168, 228, 107, 0.55);
  color: var(--green);
}

.live-board,
.watchlist-section {
  margin-bottom: 28px;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: clamp(20px, 3vw, 34px);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}
.section-copy,
.fetch-status {
  max-width: 350px;
  margin: 0;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 0.7rem;
  line-height: 1.5;
  text-align: right;
}
.status-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 22px;
  border: 1px solid rgba(224, 243, 225, 0.1);
  border-radius: 18px;
  padding: 14px 16px;
  color: var(--muted);
  background: rgba(1, 12, 7, 0.3);
  font-size: 0.94rem;
}
.status-strip strong { color: var(--ink); }
.status-dot {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--quiet);
  box-shadow: 0 0 0 6px rgba(112, 128, 117, 0.12);
}
.status-dot.live {
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(168, 228, 107, 0.12), 0 0 14px rgba(168, 228, 107, 0.7);
}
.status-dot.active {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 167, 85, 0.12), 0 0 14px rgba(255, 167, 85, 0.8);
}
.status-dot.error {
  background: var(--red);
  box-shadow: 0 0 0 6px rgba(255, 126, 103, 0.12), 0 0 14px rgba(255, 126, 103, 0.75);
}
.last-activity-line {
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
}
.last-activity-line strong { color: var(--ink); }
.live-key {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 22px 0 14px;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.key-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  border-radius: 50%;
}
.airborne-dot { background: var(--orange); box-shadow: 0 0 9px var(--orange); }
.detected-dot { background: var(--green); box-shadow: 0 0 9px rgba(168, 228, 107, 0.66); }
.quiet-dot { background: var(--quiet); }
.live-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.live-card,
.empty-state {
  border: 1px solid rgba(224, 243, 225, 0.13);
  border-radius: 20px;
  padding: 20px;
  background: rgba(1, 12, 7, 0.38);
}
.live-card {
  position: relative;
  overflow: hidden;
  min-height: 210px;
}
.live-card.airborne::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--orange);
  box-shadow: 0 0 16px var(--orange);
  content: "";
}
.live-card.has-route-link { padding-bottom: 58px; }
.live-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}
.live-card-head h3 {
  max-width: 220px;
  font-size: 1.22rem;
  line-height: 1.08;
  letter-spacing: -0.04em;
}
.status-badge {
  flex: 0 0 auto;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 6px 8px;
  font-family: "DM Mono", monospace;
  font-size: 0.64rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.status-badge.airborne { color: var(--orange); }
.status-badge.detected { color: var(--green); }
.live-card-meta {
  margin: 13px 0 18px;
  color: var(--muted);
  line-height: 1.5;
}
.data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.data-grid span {
  display: block;
  margin-bottom: 5px;
  color: var(--quiet);
  font-family: "DM Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.data-grid strong {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: 0.98rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.live-route-link {
  position: absolute;
  right: 18px;
  bottom: 18px;
  color: var(--green);
  font-weight: 900;
}
.live-route-link:hover,
.live-route-link:focus-visible {
  color: #c1f589;
  outline: none;
}
.empty-state {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 140px;
  color: var(--muted);
}
.empty-icon,
.quiet-radar {
  display: inline-flex;
  width: 36px;
  height: 2px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--quiet);
}
.empty-state h3 {
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 1rem;
}
.empty-state p {
  max-width: 560px;
  margin-bottom: 0;
  line-height: 1.55;
}
.error-state .empty-icon {
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--red);
  background: rgba(255, 126, 103, 0.08);
  font-family: "DM Mono", monospace;
  font-size: 1.3rem;
}
.small-note {
  margin: 18px 0 0;
  color: var(--quiet);
  font-size: 0.88rem;
  line-height: 1.55;
}

.detail-section { margin-top: 4px; }
.aircraft-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}
.aircraft-card {
  display: block;
  position: relative;
  min-height: 190px;
  border: 1px solid rgba(224, 243, 225, 0.12);
  border-radius: 22px;
  padding: 20px;
  background: rgba(1, 12, 7, 0.34);
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.aircraft-card:hover,
.aircraft-card:focus-visible {
  border-color: rgba(168, 228, 107, 0.46);
  background: rgba(168, 228, 107, 0.06);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.16);
  outline: none;
  transform: translateY(-2px);
}
.aircraft-code {
  display: inline-flex;
  margin-bottom: 18px;
  border: 1px solid rgba(168, 228, 107, 0.22);
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--green);
  background: rgba(168, 228, 107, 0.055);
  font-family: "DM Mono", monospace;
  font-size: 0.66rem;
  font-weight: 500;
}
.aircraft-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.22rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}
.aircraft-model {
  display: block;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.45;
}
.aircraft-card p {
  margin: 16px 0 28px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.aircraft-footer {
  position: absolute;
  right: 20px;
  bottom: 18px;
  color: var(--green);
  font-family: "DM Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

footer {
  padding: 0 0 34px;
  color: var(--quiet);
  font-size: 0.78rem;
}
footer p {
  max-width: 650px;
  margin-bottom: 0;
  line-height: 1.55;
}

@media (max-width: 760px) {
  .app-shell { width: min(100% - 26px, 1000px); }
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 16px 0 12px;
  }
  .top-links { gap: 14px; }
  .hero,
  .compact-hero {
    padding: 28px 0 18px;
  }
  h1 { font-size: clamp(2.45rem, 14vw, 4.4rem); }
  .section-heading { display: block; }
  .fetch-status,
  .section-copy {
    max-width: none;
    margin-top: 12px;
    text-align: left;
  }
  .live-cards,
  .aircraft-grid {
    grid-template-columns: 1fr;
  }
  .status-strip { display: grid; grid-template-columns: auto 1fr; }
  .live-board,
  .watchlist-section {
    border-radius: 22px;
    padding: 21px;
  }
  .data-grid { grid-template-columns: 1fr; }
  .empty-state {
    align-items: flex-start;
    justify-content: flex-start;
  }
}