:root {
  --bg: #0b0f1a;
  --panel: #111a2b;
  --edge: #3af6ff;
  --hot: #ff5cf0;
  --acid: #b6ff00;
  --grid: #1d2a45;
  --text: #d8f4ff;
  --shadow: #000000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Courier New", "Lucida Console", monospace;
  background: radial-gradient(circle at 20% 20%, #1c2b4a, #080b14 65%);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 64px;
}

.scanlines {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.12),
    rgba(0, 0, 0, 0.12) 1px,
    transparent 2px,
    transparent 4px
  );
  pointer-events: none;
  mix-blend-mode: soft-light;
  z-index: 1;
}

.shell {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(260px, 320px);
  gap: 20px;
  padding: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: #0b1428;
  border-top: 4px solid var(--edge);
  padding: 12px 16px;
  text-align: center;
  letter-spacing: 1px;
  box-shadow: 0 -6px 0 var(--shadow);
  z-index: 4;
}

.footer-link {
  color: var(--hot);
  text-decoration: none;
  text-transform: uppercase;
}

.footer-link:hover {
  color: var(--acid);
}

.marquee {
  grid-column: 1 / -1;
  border: 4px solid var(--edge);
  background: #0b1428;
  padding: 10px 16px;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: 6px 6px 0 var(--shadow);
}

.board {
  background: var(--panel);
  padding: 18px;
  border: 4px solid var(--edge);
  box-shadow: 10px 10px 0 var(--shadow);
}

.hud {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.mode {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.mode-btn.active {
  border-color: var(--acid);
  color: var(--acid);
}

.stat {
  background: #0b1428;
  border: 3px solid var(--hot);
  padding: 8px;
  text-align: center;
}

.label {
  font-size: 12px;
  letter-spacing: 2px;
}

.value {
  font-size: 24px;
  color: var(--acid);
  margin-top: 6px;
}

#game {
  display: block;
  width: 100%;
  height: auto;
  background: linear-gradient(135deg, #0a1224, #09101f);
  border: 4px solid var(--edge);
}

.controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  flex: 1;
  padding: 10px 12px;
  background: #0b0f1a;
  color: var(--text);
  border: 4px solid var(--hot);
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--shadow);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--shadow);
}

.tips {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 1px;
  color: #9bc4ff;
}

.scores {
  background: #0b1428;
  border: 4px solid var(--edge);
  padding: 18px;
  box-shadow: 10px 10px 0 var(--shadow);
}

.panel-title {
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
  color: var(--hot);
}

.score-list {
  list-style: none;
  padding: 0;
  margin: 0 0 12px 0;
}

.score-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 6px;
  border-bottom: 2px solid var(--grid);
}

.message {
  min-height: 24px;
  color: var(--acid);
}

.entry {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 16, 0.85);
  display: grid;
  place-items: center;
  z-index: 5;
}

.entry.hidden {
  display: none;
}

.entry-box {
  background: #0b1428;
  border: 4px solid var(--hot);
  padding: 24px;
  width: min(90vw, 420px);
  box-shadow: 10px 10px 0 var(--shadow);
}

.entry-title {
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.entry-box form {
  display: grid;
  gap: 10px;
}

.entry-box input {
  padding: 10px;
  border: 3px solid var(--edge);
  background: #0b0f1a;
  color: var(--text);
  font-family: inherit;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .hud {
    grid-template-columns: repeat(3, 1fr);
  }
}