:root {
  --bg: #04060f;
  --bg2: #0a1020;
  --panel: rgba(12, 20, 40, 0.9);
  --panel-alt: rgba(18, 28, 54, 0.88);
  --text: #f8fbff;
  --muted: #c7d4ea;
  --cyan: #7dd3ff;
  --magenta: #ff4fd8;
  --yellow: #ffe066;
  --line: rgba(125, 211, 255, 0.45);
  --glow: 0 0 16px rgba(125, 211, 255, 0.25);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Trebuchet MS", "Verdana", "Geneva", sans-serif;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(248, 251, 255, 0.2) 0 1px, transparent 1px),
    radial-gradient(circle at 76% 30%, rgba(125, 211, 255, 0.18) 0 1px, transparent 1px),
    radial-gradient(circle at 55% 72%, rgba(255, 224, 102, 0.18) 0 1px, transparent 1px),
    radial-gradient(circle at 40% 40%, rgba(248, 251, 255, 0.1) 0 1px, transparent 1px),
    linear-gradient(180deg, var(--bg2) 0%, var(--bg) 100%);
  background-size: 170px 170px, 230px 230px, 270px 270px, 130px 130px, 100% 100%;
  line-height: 1.62;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(248, 251, 255, 0.06) 0,
    rgba(248, 251, 255, 0.06) 1px,
    transparent 1px,
    transparent 4px
  );
  opacity: 0.06;
  z-index: 7;
}

main,
header,
footer {
  position: relative;
  z-index: 2;
}

a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover,
a:focus-visible {
  color: var(--yellow);
}

.container {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding-top: 1rem;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Courier New", "Lucida Console", monospace;
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text);
  text-shadow:
    2px 0 0 #0c1533,
    0 2px 0 #0c1533,
    3px 3px 0 rgba(255, 79, 216, 0.5);
}

.brand::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #ffe066;
  box-shadow:
    6px 0 0 #ffe066,
    12px 0 0 #ffe066,
    18px 0 0 #ffe066,
    6px 6px 0 #7dd3ff,
    12px 6px 0 #7dd3ff,
    18px 6px 0 #7dd3ff,
    12px 12px 0 #ff4fd8;
  flex-shrink: 0;
  image-rendering: pixelated;
}

.nav-links {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  padding: 0.45rem 0.65rem;
  border: 2px solid rgba(255, 79, 216, 0.45);
  background: rgba(8, 14, 28, 0.65);
  color: var(--text);
  letter-spacing: 0.09em;
  font-size: 0.84rem;
  border-radius: 0;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(125, 211, 255, 0.35);
}

.panel,
.card {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-alt) 100%);
  border: 2px solid var(--line);
  box-shadow:
    inset 0 0 0 2px rgba(5, 10, 22, 0.7),
    0 0 0 3px rgba(125, 211, 255, 0.12),
    var(--glow);
  border-radius: 0;
  padding: 1rem;
}

.hero {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0;
  display: inline-block;
  font-size: clamp(1.65rem, 3.6vw, 2.65rem);
  line-height: 1.2;
  padding: 0.5rem 0.7rem;
  border: 3px solid rgba(255, 79, 216, 0.7);
  background: linear-gradient(180deg, rgba(18, 30, 58, 0.85), rgba(9, 14, 28, 0.95));
  box-shadow:
    4px 4px 0 rgba(125, 211, 255, 0.35),
    inset 0 0 0 2px rgba(4, 7, 14, 0.65);
  text-shadow:
    2px 0 0 #13213d,
    0 2px 0 #13213d,
    3px 3px 0 rgba(125, 211, 255, 0.5);
}

.hero-logo {
  font-family: "Courier New", "Lucida Console", monospace;
  min-width: min(92vw, 740px);
  background-image:
    linear-gradient(90deg, rgba(125, 211, 255, 0.09) 1px, transparent 1px),
    linear-gradient(180deg, rgba(125, 211, 255, 0.09) 1px, transparent 1px),
    linear-gradient(180deg, rgba(15, 23, 43, 0.92), rgba(6, 10, 20, 0.98));
  background-size: 10px 10px, 10px 10px, 100% 100%;
}

.hero-logo .logo-row {
  display: block;
  line-height: 0.96;
  font-size: clamp(1.9rem, 7.2vw, 4rem);
  letter-spacing: 0.14em;
}

.hero-logo .logo-cosmic {
  color: var(--cyan);
  text-shadow:
    2px 0 0 rgba(12, 21, 51, 0.95),
    0 2px 0 rgba(12, 21, 51, 0.95),
    4px 4px 0 rgba(255, 79, 216, 0.72);
}

.hero-logo .logo-facts {
  margin-top: 0.04em;
  color: var(--yellow);
  text-shadow:
    2px 0 0 rgba(12, 21, 51, 0.95),
    0 2px 0 rgba(12, 21, 51, 0.95),
    4px 4px 0 rgba(125, 211, 255, 0.72);
}

.hero-logo .logo-sub {
  display: inline-block;
  margin-top: 0.55rem;
  padding-top: 0.4rem;
  font-size: clamp(0.68rem, 1.9vw, 1rem);
  letter-spacing: 0.24em;
  border-top: 2px solid rgba(255, 79, 216, 0.55);
  color: #f3f7ff;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero p {
  margin-top: 0.8rem;
  margin-bottom: 0;
  color: var(--muted);
  max-width: 65ch;
}

h1,
h2,
h3,
.btn,
.section-title,
thead th {
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

h2 {
  margin-top: 2rem;
  margin-bottom: 0.65rem;
}

.btn,
button {
  display: inline-block;
  border: 2px solid rgba(255, 79, 216, 0.7);
  background: linear-gradient(180deg, rgba(255, 79, 216, 0.2), rgba(18, 26, 48, 0.95));
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0.55rem 0.9rem;
  margin-right: 0.6rem;
  margin-top: 0.55rem;
  border-radius: 0;
  box-shadow:
    inset 0 -3px 0 rgba(255, 79, 216, 0.22),
    0 0 0 2px rgba(5, 10, 22, 0.55);
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible,
button:hover,
button:focus-visible {
  border-color: var(--cyan);
  box-shadow:
    inset 0 -3px 0 rgba(125, 211, 255, 0.32),
    0 0 14px rgba(125, 211, 255, 0.45);
}

.btn-row {
  margin-top: 0.85rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.category-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.category-grid .card h3 {
  margin-top: 0;
  margin-bottom: 0.55rem;
  font-size: 1rem;
}

.category-grid .card p {
  margin: 0;
  color: var(--muted);
}

.arcade-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.canvas-wrap {
  position: relative;
  max-width: 900px;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
  border: 2px solid rgba(125, 211, 255, 0.35);
  background: rgba(2, 5, 11, 0.9);
}

.touch-zones {
  position: absolute;
  inset: 0;
  display: flex;
  pointer-events: none;
}

#zoneMove {
  flex: 1;
}

#zoneFire {
  width: 40%;
}

.hint {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumb {
  margin-top: 0.75rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.facts-list {
  margin: 0;
  padding-left: 1.1rem;
}

.facts-list li {
  margin: 0.45rem 0;
}

article {
  margin-top: 1rem;
}

.table-wrap {
  overflow-x: auto;
  margin: 0.75rem 0 0.4rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 500px;
}

th,
td {
  border: 1px solid rgba(125, 211, 255, 0.35);
  padding: 0.55rem;
  text-align: left;
}

thead th {
  background: rgba(125, 211, 255, 0.15);
}

details {
  margin: 0.45rem 0;
  border: 1px solid rgba(125, 211, 255, 0.3);
  border-radius: 4px;
  padding: 0.5rem 0.65rem;
  background: rgba(8, 14, 30, 0.55);
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.next-reading ul {
  margin: 0;
  padding-left: 1.1rem;
}

.site-footer {
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.disclaimer {
  color: var(--muted);
  margin-top: 0.5rem;
  margin-bottom: 0;
  font-size: 0.84rem;
}

@media (hover: none), (pointer: coarse) {
  .touch-zones {
    pointer-events: auto;
  }
}

@media (max-width: 900px) {
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .category-grid {
    grid-template-columns: 1fr;
  }

  .btn,
  button {
    width: 100%;
    margin-right: 0;
  }

  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-logo .logo-row {
    letter-spacing: 0.1em;
  }

  .hero-logo .logo-sub {
    letter-spacing: 0.16em;
  }
}