:root {
  --bg: #07100f;
  --bg-2: #0b1718;
  --panel: rgba(12, 25, 27, 0.88);
  --panel-strong: rgba(15, 32, 35, 0.96);
  --line: rgba(82, 246, 255, 0.26);
  --line-strong: rgba(82, 246, 255, 0.62);
  --text: #f0f5f0;
  --muted: #a2b4b2;
  --lime: #b7ff21;
  --cyan: #52f6ff;
  --amber: #ffae22;
  --danger: #ff5c6c;
  --shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(rgba(82, 246, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 246, 255, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 70% 10%, rgba(183, 255, 33, 0.12), transparent 30%),
    linear-gradient(180deg, #050908 0%, var(--bg) 42%, #060b0c 100%);
  background-size: 32px 32px, 32px 32px, auto, auto;
  font-family: var(--sans);
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(180deg, rgba(255,255,255,0.035), transparent 18%),
    repeating-linear-gradient(180deg, rgba(255,255,255,0.025) 0, rgba(255,255,255,0.025) 1px, transparent 1px, transparent 5px);
  opacity: 0.55;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 18px 52px;
  background: rgba(4, 10, 11, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.25);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 21px;
  font-weight: 900;
  text-transform: uppercase;
}

.brand strong {
  color: var(--lime);
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--bg);
  background: var(--lime);
  clip-path: polygon(18% 0, 100% 0, 100% 76%, 78% 100%, 0 100%, 0 24%);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 900;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

nav a {
  position: relative;
  padding: 8px 0;
}

nav a:hover {
  color: var(--cyan);
}

main {
  width: min(100%, 1480px);
  margin: 0 auto;
  padding: 0 32px 48px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
  gap: 34px;
  align-items: center;
  min-height: 540px;
  padding: 34px 0 18px;
}

.hero-copy h1,
.guide-hero h1 {
  margin: 0;
  max-width: 720px;
  font-family: var(--mono);
  font-size: 64px;
  line-height: 0.98;
  text-transform: uppercase;
  text-shadow: 0 0 26px rgba(82, 246, 255, 0.16);
}

.hero-copy p,
.guide-hero p,
.section-head p,
.panel p,
footer p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-copy p {
  max-width: 660px;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 900;
  text-transform: uppercase;
}

.button.primary {
  color: #07100f;
  background: linear-gradient(90deg, var(--lime), #dfff6b);
  border-color: var(--lime);
  box-shadow: 0 0 24px rgba(183, 255, 33, 0.24);
}

.button.secondary {
  color: var(--cyan);
  background: rgba(82, 246, 255, 0.06);
}

.terminal-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 640px;
  margin: 28px 0 0;
  border: 1px solid var(--line);
  background: rgba(4, 10, 11, 0.56);
}

.terminal-stats div {
  padding: 14px 18px;
  border-right: 1px solid var(--line);
}

.terminal-stats div:last-child {
  border-right: 0;
}

.terminal-stats dt,
.facts dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.terminal-stats dd,
.facts dd {
  margin: 6px 0 0;
  color: var(--lime);
  font-family: var(--mono);
  font-weight: 900;
  text-transform: uppercase;
}

.hero-visual {
  position: relative;
  min-height: 420px;
}

.visual-frame,
.content-band,
.panel,
.mission-strip {
  position: relative;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(82, 246, 255, 0.08), transparent 36%),
    linear-gradient(180deg, var(--panel-strong), rgba(7, 16, 15, 0.88));
  box-shadow: var(--shadow);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.visual-frame {
  height: 420px;
  overflow: hidden;
}

.visual-frame::before,
.content-band::before,
.panel::before,
.mission-strip::before {
  position: absolute;
  inset: 8px;
  pointer-events: none;
  content: "";
  border: 1px solid rgba(82, 246, 255, 0.11);
}

.scan-label {
  position: absolute;
  top: 26px;
  left: 28px;
  z-index: 2;
  display: grid;
  gap: 4px;
  font-family: var(--mono);
  text-transform: uppercase;
}

.scan-label span,
.signal-box span,
.guide-meta span,
.card-index,
.difficulty,
.back-link {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.scan-label strong {
  color: var(--lime);
  font-size: 18px;
}

.radar-art {
  position: absolute;
  inset: 16px 0 0 0;
  width: 100%;
  height: calc(100% - 10px);
  filter: drop-shadow(0 0 18px rgba(183, 255, 33, 0.22));
}

.radar-rings circle,
.radar-rings path,
.radar-ticks path {
  fill: none;
  stroke: rgba(82, 246, 255, 0.32);
  stroke-width: 1.2;
}

.radar-sweep {
  fill: rgba(82, 246, 255, 0.06);
}

.chameleon-wire,
.chameleon-tail {
  fill: rgba(183, 255, 33, 0.08);
  stroke: url(#radarGlow);
  stroke-width: 2;
}

.target-dot {
  fill: rgba(183, 255, 33, 0.2);
  stroke: var(--lime);
  stroke-width: 2;
}

.signal-box {
  position: absolute;
  right: 28px;
  bottom: 28px;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, 12px);
  gap: 5px;
  align-items: end;
  padding: 16px;
  border: 1px solid rgba(255, 174, 34, 0.54);
  background: rgba(255, 174, 34, 0.06);
}

.signal-box span {
  grid-column: 1 / -1;
  color: var(--amber);
}

.signal-box b {
  display: block;
  width: 12px;
  background: var(--amber);
}

.signal-box b:nth-child(2) { height: 8px; }
.signal-box b:nth-child(3) { height: 14px; }
.signal-box b:nth-child(4) { height: 20px; }
.signal-box b:nth-child(5) { height: 27px; }
.signal-box b:nth-child(6) { height: 35px; }

.mission-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 8px 0 18px;
  padding: 12px;
  background: rgba(8, 18, 20, 0.92);
}

.mission-strip a {
  display: grid;
  gap: 6px;
  min-height: 86px;
  padding: 18px;
  background: rgba(82, 246, 255, 0.04);
  border: 1px solid rgba(82, 246, 255, 0.16);
}

.mission-strip a:hover {
  border-color: var(--lime);
  background: rgba(183, 255, 33, 0.07);
}

.mission-strip span {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.mission-strip strong {
  font-family: var(--mono);
  font-size: 18px;
  text-transform: uppercase;
}

.content-band {
  margin-top: 18px;
  padding: 28px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: 26px;
  text-transform: uppercase;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.related-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.guide-card,
.guide-link {
  position: relative;
  display: grid;
  min-height: 210px;
  gap: 10px;
  align-content: start;
  padding: 20px;
  border: 1px solid rgba(82, 246, 255, 0.22);
  background:
    linear-gradient(180deg, rgba(82, 246, 255, 0.07), rgba(82, 246, 255, 0.02)),
    rgba(5, 12, 13, 0.74);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.guide-card:hover,
.guide-link:hover {
  border-color: var(--lime);
  box-shadow: 0 0 24px rgba(183, 255, 33, 0.12);
  transform: translateY(-2px);
}

.difficulty {
  justify-self: start;
  color: var(--lime);
  border: 1px solid rgba(183, 255, 33, 0.36);
  padding: 5px 8px;
}

.guide-card strong,
.guide-link strong {
  font-family: var(--mono);
  font-size: 19px;
  line-height: 1.2;
  text-transform: uppercase;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.route-line {
  display: flex;
  align-items: center;
  gap: 34px;
  width: 100%;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(82, 246, 255, 0.15);
}

.route-line i {
  position: relative;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
}

.route-line i::after {
  position: absolute;
  top: 3px;
  left: 8px;
  width: 34px;
  height: 1px;
  content: "";
  background: rgba(82, 246, 255, 0.42);
}

.route-line i:last-child::after {
  display: none;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.panel {
  padding: 26px;
}

.accent-panel {
  border-color: rgba(183, 255, 33, 0.38);
}

.guide-page {
  padding-top: 34px;
}

.guide-hero {
  max-width: 980px;
  padding: 36px 0 20px;
}

.guide-hero h1 {
  margin-top: 14px;
  font-size: 52px;
}

.guide-hero p {
  max-width: 760px;
  font-size: 18px;
}

.guide-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.guide-meta span {
  border: 1px solid rgba(82, 246, 255, 0.28);
  padding: 6px 9px;
  background: rgba(82, 246, 255, 0.05);
}

.facts {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
}

.facts div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(82, 246, 255, 0.18);
}

dd {
  text-align: right;
}

.check-list,
.number-list {
  margin: 14px 0 0;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.75;
}

.check-list li::marker,
.number-list li::marker {
  color: var(--lime);
}

.guide-link {
  min-height: 118px;
}

footer {
  width: min(100%, 1480px);
  margin: 0 auto;
  padding: 28px 32px 38px;
  color: var(--muted);
  border-top: 1px solid rgba(82, 246, 255, 0.18);
}

@media (max-width: 1040px) {
  .site-header {
    padding: 16px 26px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .hero-copy h1 {
    font-size: 54px;
  }

  .guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mission-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  main,
  footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-copy h1,
  .guide-hero h1 {
    font-size: 38px;
  }

  .hero-copy p,
  .guide-hero p {
    font-size: 16px;
  }

  .hero {
    gap: 24px;
    padding-top: 34px;
  }

  .hero-visual,
  .visual-frame {
    min-height: 250px;
    height: 250px;
  }

  .mission-strip,
  .guide-grid,
  .related-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .terminal-stats div {
    min-width: 0;
    padding: 12px 10px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .terminal-stats div:last-child {
    border-right: 0;
  }

  .terminal-stats dd {
    font-size: 13px;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .content-band,
  .panel {
    padding: 20px;
  }

  .brand {
    font-size: 18px;
  }
}