@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

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

:root {
  --green:  #00ff88;
  --cyan:   #00e5ff;
  --orange: #ff6b00;
  --yellow: #ffe600;
  --red:    #ff3344;
  --purple: #cc44ff;
  --bg:     #000508;
  --panel:  #00080f;
  --dim:    #445566;
}

body {
  background: #000508;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  font-family: 'Press Start 2P', monospace;
  color: var(--green);
  overflow: hidden;
  user-select: none;
}

#app { position: relative; width: 100vw; height: 100vh; display: flex; align-items: center; justify-content: center; }

.hidden { display: none !important; }

#introCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 50;
  image-rendering: pixelated;
}

#mainMenu {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  z-index: 30;
  background: radial-gradient(ellipse at 50% 55%, #001428 0%, #000508 70%);
}

#menuStars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 15%, #fff 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 40%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(2px 2px at 50% 8%,  rgba(255,255,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 25%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 60%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 20% 75%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(2px 2px at 90% 10%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 90%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 45% 55%, rgba(0,229,255,0.4) 0%, transparent 100%);
  pointer-events: none;
  animation: starsDrift 40s linear infinite;
}

@keyframes starsDrift { from { transform: translateY(0); } to { transform: translateY(-20px); } }

.menu-planet {
  position: absolute;
  bottom: -90px;
  left: 50%;
  transform: translateX(-50%);
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(ellipse at 35% 30%, #1a4a7a 0%, #0a2040 40%, #051020 75%, #020810 100%);
  box-shadow: 0 0 60px rgba(0,100,200,0.3), 0 0 120px rgba(0,100,200,0.1);
  overflow: hidden;
}
.menu-planet::before {
  content:'';
  position:absolute;
  inset:0;
  border-radius:50%;
  background: radial-gradient(ellipse at 30% 25%, rgba(40,100,180,0.5) 0%, transparent 60%);
}

.game-title {
  font-size: 54px;
  letter-spacing: 6px;
  text-align: center;
  color: var(--green);
  text-shadow: 0 0 16px var(--green), 0 0 40px rgba(0,255,136,0.3), 0 4px 0 #004422;
  line-height: 1.3;
  animation: titleGlitch 8s ease-in-out infinite;
  image-rendering: pixelated;
}

@keyframes titleGlitch {
  0%,90%,100% { text-shadow: 0 0 16px var(--green), 0 0 40px rgba(0,255,136,0.3), 0 4px 0 #004422; }
  91% { text-shadow: 3px 0 var(--red), -3px 0 var(--cyan), 0 4px 0 #004422; clip-path: inset(20% 0 60% 0); }
  92% { text-shadow: -2px 0 var(--purple), 2px 0 var(--yellow), 0 4px 0 #004422; }
  93% { text-shadow: 0 0 16px var(--green), 0 0 40px rgba(0,255,136,0.3), 0 4px 0 #004422; }
}

.menu-sub {
  font-size: 10px;
  letter-spacing: 5px;
  color: var(--cyan);
  opacity: 0.7;
  margin-top: -10px;
}

.menu-divider {
  width: 260px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  opacity: 0.35;
  image-rendering: pixelated;
}

.menu-btns { display: flex; flex-direction: column; gap: 16px; align-items: center; }

.menu-hint { font-size: 8px; color: var(--dim); letter-spacing: 2px; margin-top: -6px; }

.mbtn {
  font-family: 'Press Start 2P', monospace;
  font-size: 13px;
  letter-spacing: 2px;
  cursor: pointer;
  border: 3px solid;
  padding: 14px 44px;
  background: transparent;
  text-transform: uppercase;
  transition: all 0.12s;
  position: relative;
  image-rendering: pixelated;
}

.mbtn::after {
  content: '';
  position: absolute;
  bottom: -6px; right: -6px;
  width: 100%; height: 100%;
  border: 2px solid;
  opacity: 0.25;
  pointer-events: none;
}

.mbtn-main { border-color: var(--green); color: var(--green); }
.mbtn-main::after { border-color: var(--green); }
.mbtn-main:hover { background: rgba(0,255,136,0.12); box-shadow: 0 0 24px rgba(0,255,136,0.4), inset 0 0 12px rgba(0,255,136,0.06); color: #fff; }

.mbtn-sec { border-color: var(--cyan); color: var(--cyan); }
.mbtn-sec::after { border-color: var(--cyan); }
.mbtn-sec:hover { background: rgba(0,229,255,0.1); box-shadow: 0 0 24px rgba(0,229,255,0.35); color: #fff; }

.overlay-screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: rgba(0,5,10,0.97);
  z-index: 35;
}

.scr-title {
  font-size: 26px;
  letter-spacing: 4px;
  text-transform: uppercase;
  text-shadow: 0 0 20px currentColor, 0 3px 0 rgba(0,0,0,0.8);
}

.scr-title.green { color: var(--green); }
.scr-title.cyan  { color: var(--cyan);  }
.scr-title.yellow{ color: var(--yellow);}
.scr-title.red   { color: var(--red);   }

.brief-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 780px;
  width: 90%;
}

.brief-card {
  background: #000e1c;
  border: 2px solid #003344;
  padding: 20px 16px;
}

.brief-card h3 {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--cyan);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid #002233;
}

.brief-card p { font-size: 9px; color: #557788; line-height: 2.4; }

.purow { font-size: 9px; color: #557788; margin: 8px 0; line-height: 1.8; }
.purow.purple { color: var(--purple); }
.purow.yellow { color: var(--yellow); }
.purow.cyan   { color: var(--cyan);   }
.purow.orange { color: var(--orange); }

#gameWrap {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

#crt {
  position: relative;
  border: 3px solid #004455;
  box-shadow:
    0 0 0 2px #001a22,
    0 0 60px rgba(0,255,136,0.1),
    inset 0 0 120px rgba(0,8,16,0.4);
  border-radius: 6px;
  overflow: hidden;
  image-rendering: pixelated;
}

#crt::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,0,0,0.07) 3px, rgba(0,0,0,0.07) 4px);
  pointer-events: none;
  z-index: 99;
}

#hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  background: var(--panel);
  border-bottom: 2px solid #003344;
}

.hcell { display: flex; flex-direction: column; gap: 4px; }
.hlabel { font-size: 7px; letter-spacing: 3px; color: #223344; text-transform: uppercase; }
.hval   { font-size: 16px; letter-spacing: 3px; color: #fff; }

#gameCanvas { display: block; image-rendering: pixelated; }

#powerbar {
  display: flex;
  gap: 12px;
  padding: 8px 24px;
  background: var(--panel);
  border-top: 2px solid #003344;
  min-height: 40px;
  align-items: center;
}

.pblabel { font-size: 7px; letter-spacing: 2px; color: #223344; }

.pu-pill {
  padding: 4px 12px;
  border: 2px solid;
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  letter-spacing: 1px;
  animation: pillBlink 0.9s step-end infinite;
}

@keyframes pillBlink { 0%,100%{opacity:1} 50%{opacity:0.6} }

.pu-spread { border-color: var(--yellow); color: var(--yellow); background: #1a1000; }
.pu-shield { border-color: var(--cyan);   color: var(--cyan);   background: #001418; }
.pu-aoe    { border-color: var(--orange); color: var(--orange); background: #180800; }
.pu-rewind { border-color: var(--purple); color: var(--purple); background: #110018; }

.crt-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 40;
  padding: 36px;
}

.crt-overlay.hidden { display: none !important; }

#instrOverlay, #waveClearOverlay, #winOverlay, #loseOverlay {
  background: rgba(0,4,10,0.94);
}

.instr-box {
  background: #000d1a;
  border: 2px solid #003344;
  padding: 28px 40px;
  max-width: 540px;
  text-align: center;
}

.instr-box p { font-size: 9px; color: #5577aa; line-height: 2.6; }

.idiv {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #003344, transparent);
  margin: 12px 0;
}

.kbd {
  display: inline-block;
  padding: 1px 6px;
  background: #001828;
  border: 2px solid #334455;
  color: var(--yellow);
  font-size: 8px;
}

.dim { color: var(--dim) !important; }

.wave-title {
  font-size: 32px;
  letter-spacing: 4px;
  color: var(--yellow);
  text-shadow: 0 0 24px var(--yellow), 0 4px 0 #443300;
  animation: wavePulse 0.5s step-end infinite alternate;
}

@keyframes wavePulse { from { opacity: 1; } to { opacity: 0.7; } }

.wave-sub { font-size: 8px; letter-spacing: 3px; color: var(--dim); }

.big-win  { font-size: 38px !important; text-shadow: 0 0 30px var(--green), 0 4px 0 #003322 !important; }
.big-lose { font-size: 36px !important; text-shadow: 0 0 30px var(--red),   0 4px 0 #330011 !important; }

.sub-tag { font-size: 9px; letter-spacing: 3px; margin-top: -10px; }

.final-score {
  font-size: 52px;
  letter-spacing: 6px;
  color: #fff;
  text-shadow: 0 4px 0 #222, 0 0 30px rgba(255,255,255,0.12);
}

.score-tag { font-size: 8px; letter-spacing: 4px; color: var(--dim); margin-top: -10px; }

#rewindFlash {
  position: absolute;
  inset: 0;
  background: var(--purple);
  opacity: 0;
  pointer-events: none;
  z-index: 50;
  transition: opacity 0.1s step-end;
}

#rewindFlash.active { opacity: 0.4; }