/* ── Reset ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --cyan:   #00e5ff;
  --green:  #39ff14;
  --red:    #ff2d2d;
  --panel:  #050d05;
  --border: #0d3d0d;
  --text:   #b0c8b0;
}

body {
  background: #000;
  color: var(--text);
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Screens ── */
.screen {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}
.screen.hidden { display: none !important; }

/* ════════════════════════════════════════
   MENU SCREEN
════════════════════════════════════════ */
.menu-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 420px;
}
.menu-wrap.center { text-align: center; }

/* Title */
.title-block { text-align: center; }

.pre-title {
  font-size: 0.65rem;
  letter-spacing: 3px;
  color: var(--green);
  margin-bottom: 16px;
  opacity: 0.6;
}

.game-title {
  font-family: 'Orbitron', monospace;
  font-weight: 900;
  font-size: 3.8rem;
  line-height: 1;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 6px;
  text-shadow:
    0 0 10px var(--cyan),
    0 0 40px var(--cyan),
    0 0 80px rgba(0,229,255,0.3);
  animation: flicker 8s infinite;
}

@keyframes flicker {
  0%,94%,100% { opacity:1; }
  95%          { opacity:0.8; }
  96%          { opacity:1; }
  97%          { opacity:0.6; }
  98%          { opacity:1; }
}

.dev-credit {
  font-size: 0.65rem;
  letter-spacing: 4px;
  color: var(--text);
  margin-top: 12px;
  opacity: 0.45;
  text-transform: uppercase;
}
.dev-credit.small {
  font-size: 0.55rem;
  opacity: 0.3;
  letter-spacing: 3px;
  margin-top: 6px;
}

/* Nav buttons */
.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.nav-btn {
  width: 100%;
  padding: 14px 20px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  cursor: pointer;
  text-align: center;
  transition: all 0.18s ease;
  position: relative;
  outline: none;
}

.nav-btn::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--border);
  transition: background 0.18s;
}

.nav-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0,229,255,0.04);
  box-shadow: 0 0 20px rgba(0,229,255,0.1);
}
.nav-btn:hover::before { background: var(--cyan); }
.nav-btn:active { transform: scale(0.99); }

.nav-btn.primary {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(0,229,255,0.15);
}
.nav-btn.primary::before { background: var(--cyan); }

.nav-btn.danger { border-color: rgba(255,45,45,0.4); color: var(--red); opacity: 0.75; }
.nav-btn.danger::before { background: var(--red); }
.nav-btn.danger:hover { background: rgba(255,45,45,0.05); box-shadow: 0 0 16px rgba(255,45,45,0.15); }

/* Section title */
.section-title {
  font-family: 'Orbitron', monospace;
  font-size: 1.3rem;
  letter-spacing: 5px;
  color: var(--cyan);
  text-shadow: 0 0 14px var(--cyan);
  text-transform: uppercase;
  text-align: center;
}
.section-title.red { color: var(--red); text-shadow: 0 0 14px var(--red); }

/* Specs */
.specs-list {
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(5,13,5,0.8);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  letter-spacing: 1px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(13,61,13,0.4);
}
.spec-row:last-child { border-bottom: none; padding-bottom: 0; }
.spec-key { color: #3a6a3a; text-transform: uppercase; letter-spacing: 2px; font-size: 0.68rem; }
.spec-val { color: var(--text); }
.spec-val.neon-green { color: var(--green); text-shadow: 0 0 8px var(--green); }

/* Terminated */
.terminated-msg { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.term-code { font-size: 0.68rem; letter-spacing: 3px; color: var(--red); opacity: 0.6; }
.term-sub  { font-size: 0.78rem; color: #555; letter-spacing: 2px; }

/* ════════════════════════════════════════
   GAME SCREEN
════════════════════════════════════════ */
#gameScreen {
  gap: 0;
}

.game-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

/* HUD */
.hud {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  width: 400px;
  border: 1px solid var(--border);
  border-bottom: none;
  background: rgba(5,13,5,0.95);
}

.hud-btn {
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: #3a6a3a;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 2px;
  padding: 8px 14px;
  cursor: pointer;
  transition: color 0.15s;
  white-space: nowrap;
}
.hud-btn:hover { color: var(--cyan); }

.hud-scores { display: flex; }

.hud-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-right: 1px solid var(--border);
  min-width: 72px;
}
.hud-label { font-size: 0.5rem; letter-spacing: 2px; color: #2a5a2a; }
.hud-val   {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cyan);
  font-family: 'Orbitron', monospace;
  line-height: 1.2;
}

.hud-diff {
  font-size: 0.55rem;
  letter-spacing: 2px;
  padding: 0 14px;
  color: var(--cyan);
  display: flex;
  align-items: center;
  border-left: 1px solid var(--border);
  margin-left: auto;
}
.hud-diff.low  { color: #60a5fa; }
.hud-diff.high { color: var(--red); }

/* Canvas */
.canvas-wrap {
  position: relative;
  border: 1px solid var(--border);
  box-shadow:
    0 0 0 1px rgba(0,229,255,0.06),
    0 0 40px rgba(0,0,0,0.8);
}
#gameCanvas { display: block; background: #000; }

/* Footer bar */
.game-footer {
  width: 400px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
  border-top: none;
  background: rgba(5,13,5,0.95);
  padding: 6px 14px;
}
.key-hint  { font-size: 0.55rem; color: #1e4a1e; letter-spacing: 2px; text-transform: uppercase; }
.dev-credit.footer { font-size: 0.55rem; opacity: 0.3; letter-spacing: 2px; margin: 0; }

/* Overlay */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
}
.overlay.hidden { display: none; }

.overlay-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 28px 32px;
  border: 1px solid var(--border);
  background: rgba(5,13,5,0.98);
  min-width: 260px;
  box-shadow: 0 0 40px rgba(0,229,255,0.06);
}

.overlay-code  { font-size: 0.6rem; letter-spacing: 3px; color: #2a5a2a; }
.overlay-title {
  font-family: 'Orbitron', monospace;
  font-size: 1.6rem;
  color: var(--cyan);
  text-shadow: 0 0 16px var(--cyan);
  letter-spacing: 4px;
}
.overlay-msg   { font-size: 0.72rem; color: #4a7a4a; letter-spacing: 2px; }
.overlay-btns { display: flex; gap: 10px; margin-top: 4px; }
.overlay-btns .nav-btn { width: auto; padding: 11px 28px; }

/* D-Pad */
.dpad-wrap { display: none; margin-top: 16px; }
.dpad { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.dpad-row { display: flex; gap: 40px; }

.dpad-btn {
  width: 54px; height: 54px;
  background: rgba(5,13,5,0.9);
  border: 1px solid var(--border);
  color: var(--cyan);
  font-size: 1rem;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  transition: background 0.1s;
}
.dpad-btn:active { background: rgba(0,229,255,0.08); }

@media (hover:none) and (pointer:coarse) { .dpad-wrap { display: flex; } }

/* ── Responsive ── */
@media (max-width: 460px) {
  #gameCanvas { width: 320px; height: 320px; }
  .hud { width: 320px; }
  .game-footer { width: 320px; }
  .game-title { font-size: 2.6rem; }
  .dpad-wrap { display: flex; }
}