:root {
  --bg: #05060a;
  --ink: #d7f5e2;          /* soft phosphor white-green */
  --glow: #5cff9d;         /* vector green */
  --glow-dim: #2a8f57;
  --hazard: #ff6b5c;       /* used only for lives-lost / errors */
  --panel: #0a0e14;
  --line: #16351f;
  --font: "Share Tech Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background:
    radial-gradient(120% 120% at 50% 0%, #0b1018 0%, var(--bg) 60%);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: none;
}

.frame {
  min-height: 100%;
  display: grid;
  grid-template-columns: 1fr 240px;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "hud   hud"
    "stage board";
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px;
}

.hud {
  grid-area: hud;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  letter-spacing: 0.18em;
}
.hud-title { color: var(--glow); text-shadow: 0 0 12px var(--glow-dim); font-size: 15px; }
.hud-score span { color: var(--glow); }
.hud-lives { display: flex; gap: 8px; }
.hud-lives .life {
  width: 12px; height: 16px;
  clip-path: polygon(50% 0, 100% 100%, 50% 78%, 0 100%);
  background: var(--glow);
  box-shadow: 0 0 8px var(--glow-dim);
}

.stage {
  grid-area: stage;
  position: relative;
  aspect-ratio: 4 / 3;
  width: 100%;
  border: 1px solid var(--line);
  background: #020306;
  box-shadow: inset 0 0 60px rgba(92,255,157,0.05);
}

canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
}

/* scanline veil — subtle, not a gimmick */
.stage::after {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0 2px,
    rgba(0,0,0,0.16) 2px 3px
  );
  mix-blend-mode: multiply;
}

.overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 16px; text-align: center;
  background: rgba(2,3,6,0.82);
  backdrop-filter: blur(1px);
  z-index: 2;
}
.overlay.hidden { display: none; }

.glow {
  color: var(--glow);
  letter-spacing: 0.3em;
  text-shadow: 0 0 18px var(--glow), 0 0 42px var(--glow-dim);
  margin: 0;
  font-size: clamp(28px, 6vw, 52px);
}
.sub { color: var(--ink); opacity: 0.75; max-width: 30ch; line-height: 1.9; font-size: 12px; }
kbd {
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--glow);
}

.btn {
  font-family: var(--font);
  letter-spacing: 0.2em;
  color: var(--bg);
  background: var(--glow);
  border: none;
  padding: 12px 22px;
  cursor: pointer;
  box-shadow: 0 0 18px var(--glow-dim);
  transition: transform 0.08s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 0 28px var(--glow); }
.btn:active { transform: translateY(0); }
.btn-ghost {
  background: transparent; color: var(--glow);
  border: 1px solid var(--glow-dim); box-shadow: none;
}

.entry { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.entry label { font-size: 11px; opacity: 0.7; letter-spacing: 0.2em; }
#initials {
  width: 120px; text-align: center;
  font-family: var(--font); font-size: 32px; letter-spacing: 0.4em;
  text-transform: uppercase;
  background: #020306; color: var(--glow);
  border: 1px solid var(--glow-dim); padding: 8px;
  text-shadow: 0 0 12px var(--glow-dim);
}
#initials:focus { outline: none; border-color: var(--glow); box-shadow: 0 0 16px var(--glow-dim); }
.entry-status { font-size: 12px; }
.entry-status.hidden { display: none; }
.entry-status.err { color: var(--hazard); }

.board {
  grid-area: board;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 14px 16px;
}
.board h2 {
  color: var(--glow); font-size: 13px; letter-spacing: 0.2em;
  margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
#leaderboard { list-style: none; margin: 0; padding: 0; counter-reset: rank; }
#leaderboard li {
  display: flex; justify-content: space-between;
  padding: 6px 0; font-size: 13px;
  border-bottom: 1px dotted var(--line);
}
#leaderboard li::before { counter-increment: rank; content: counter(rank); color: var(--glow-dim); width: 22px; }
#leaderboard li .nm { flex: 1; color: var(--ink); letter-spacing: 0.15em; }
#leaderboard li .sc { color: var(--glow); }
#leaderboard li.me .nm, #leaderboard li.me .sc { color: #fff; text-shadow: 0 0 10px var(--glow); }
#leaderboard li.loading { opacity: 0.5; justify-content: center; }
#leaderboard li.loading::before { content: ""; width: 0; }

@media (max-width: 720px) {
  .frame { grid-template-columns: 1fr; grid-template-areas: "hud" "stage" "board"; }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}