/* ===== Base ===== */
:root{
  --bg:#0f1621;
  --panel:#121a27;
  --ink:#e9f0ff;
  --muted:#9fb0c9;
  --accent:#58c77a;     /* green */
  --accent-fast:#ffd22e;/* yellow */
  --danger:#ff6b6b;
  --white:#ffffff;
  --chip-human:#e24a58;
  --chip-alien:#2aa8ff;
  --btn:#233044;
  --btn-hover:#2e3c55;
  --ring:rgba(255,255,255,.08);
}

*{box-sizing:border-box}
html,body{
  height:100%;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, Noto Sans, "Apple Color Emoji","Segoe UI Emoji";
  margin:0;
}

button{
  font:inherit;
  color:inherit;
}

/* ===== Screens ===== */
.screen{
  display:none;
  min-height:100dvh;
  padding:24px 16px 40px;
}
.screen.visible{display:block}

/* ===== Start Panel ===== */
.start-panel{
  max-width:780px;
  margin:48px auto;
  background:var(--panel);
  border:1px solid var(--ring);
  border-radius:16px;
  padding:32px;
  box-shadow:0 10px 30px rgba(0,0,0,.25);
  text-align:center;
}
.title{
  font-size:40px;
  margin:0 0 6px;
  letter-spacing:.5px;
}
.subtitle{
  margin:0 0 16px;
  color:var(--muted);
}
.actions{ display:flex; gap:12px; justify-content:center; margin:12px 0 6px; }
.tip{ color:var(--muted); font-size:.95rem; margin-top:10px; }

/* ===== Buttons ===== */
.btn{
  background:var(--btn);
  border:1px solid var(--ring);
  border-radius:10px;
  padding:10px 16px;
  cursor:pointer;
  transition:transform .05s ease, background .15s ease, box-shadow .15s ease;
  box-shadow:0 2px 0 rgba(0,0,0,.3);
}
.btn:hover{ background:var(--btn-hover); transform:translateY(-1px); }
.btn:active{ transform:translateY(0); }
.btn.primary{ background:#3a7bfd; border-color:#3a7bfd33; box-shadow:0 6px 16px rgba(58,123,253,.25); }
.btn.primary:hover{ filter:brightness(1.05); }

.hidden{ display:none !important; }

/* ===== Level Select ===== */
.select-title{
  text-align:center; font-size:28px; margin:8px 0 18px;
}
.chapter{
  max-width:1100px; margin:0 auto 22px;
}
.chapter-header{
  display:flex; align-items:center; gap:10px; color:var(--muted); margin:0 0 8px 4px;
}
.chip{
  display:inline-block; padding:4px 10px; border-radius:999px; font-weight:700; color:var(--white);
  background:var(--chip-human);
}
.chip-alien{ background:var(--chip-alien); }
.level-wheel{
  display:flex; gap:8px; overflow-x:auto; padding:12px; border-radius:12px; background:#0b1320; border:1px solid var(--ring);
  scroll-snap-type:x mandatory;
}
.level-btn{
  min-width:56px; height:56px; border-radius:12px; border:1px solid var(--ring); background:#141c2a; color:var(--ink);
  display:flex; align-items:center; justify-content:center; position:relative; cursor:default; opacity:.5;
  scroll-snap-align:start;
}
.level-btn.unlocked{ cursor:pointer; opacity:1; }
.level-btn.selected{ outline:2px solid #3a7bfd; }
.level-btn .tag{
  position:absolute; bottom:-8px; left:50%; transform:translateX(-50%); background:#0b1320; border:1px solid var(--ring);
  padding:2px 6px; border-radius:8px; font-size:.7rem; color:var(--muted);
}

/* ===== Game Screen Layout ===== */
.hud-top{
  display:flex; justify-content:center; align-items:center; margin:6px 0 10px;
}
.level-pill{
  background:rgba(0,0,0,.35);
  border:1px solid var(--ring);
  padding:6px 14px;
  border-radius:999px;
  font-weight:800;
  letter-spacing:.5px;
  box-shadow:0 6px 16px rgba(0,0,0,.25);
}

.game-wrap{
  max-width:1200px;
  margin:0 auto;
  display:flex; flex-direction:column; align-items:center;
}

.canvas-outer{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--ring);
  background:#101826;
  box-shadow:0 15px 40px rgba(0,0,0,.35);
}
#game{
  display:block;
  width:100%;
  height:auto;
}

/* ===== Center banner (animated) ===== */
.center-msg{
  position:absolute;
  left:50%; top:50%;
  transform:translate(-50%,-50%) scale(.95);
  padding:14px 24px;
  font-size:40px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:1px;
  color:#fff;
  background:linear-gradient(90deg, #3a7bfd, #58c77a);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 6px 18px rgba(0,0,0,.5));
  opacity:0;
  pointer-events:none;
}
.center-msg.show{
  animation:centerPop .75s cubic-bezier(.2,.8,.2,1) forwards,
            glowPulse 2.2s ease-in-out infinite .75s;
}
@keyframes centerPop{
  0%{ opacity:0; transform:translate(-50%,-50%) scale(.8); }
  60%{ opacity:1; transform:translate(-50%,-50%) scale(1.05); }
  100%{ opacity:1; transform:translate(-50%,-50%) scale(1.0); }
}
@keyframes glowPulse{
  0%,100%{ text-shadow:0 0 0 rgba(90,200,250,.0); }
  50%{ text-shadow:0 0 22px rgba(90,200,250,.35); }
}

/* ===== Spawn Row ===== */
.spawn-row{
  display:flex;
  gap:22px;
  margin:14px 0 8px;
  align-items:center;
  justify-content:center;
}
.spawn-btn{
  display:flex; flex-direction:column; align-items:center; gap:6px;
  background:transparent; border:none; cursor:pointer; padding:6px 10px;
}
.spawn-btn.disabled{ opacity:.45; cursor:not-allowed; }
.spawn-icon{
  width:64px; height:64px; border-radius:50%;
  background:rgba(255,255,255,.06);
  border:1px solid var(--ring);
  box-shadow:inset 0 4px 18px rgba(0,0,0,.35), 0 6px 16px rgba(0,0,0,.25);
}
.spawn-name{ font-weight:700; font-size:.95rem; }
#btnSpawnBad .spawn-name{ color:var(--accent); }
#btnSpawnFastBad .spawn-name{ color:var(--accent-fast); }
.spawn-quota{
  font-weight:700; color:#b9c7e6; background:#0b1320; border:1px solid var(--ring);
  padding:2px 8px; border-radius:999px; font-size:.86rem;
}

/* ===== HUD Counts ===== */
.hud-row{
  display:flex; align-items:center; justify-content:center;
  gap:16px; margin:6px 0 14px; color:var(--ink);
}
.pill{
  background:#0b1320; border:1px solid var(--ring); border-radius:999px;
  padding:6px 10px; font-weight:700;
}
.pill.good strong{ color:#ff9e9e; }
.pill.bad  strong{ color:#84f7a8; }
.pill.white strong{ color:#ffffff; }
.divider{ color:#3b4a64; }

/* ===== Flow Buttons ===== */
.flow-buttons{
  display:flex; gap:10px; justify-content:center; align-items:center;
  margin:6px 0 0;
}

/* ===== Utilities ===== */
.hidden{ display:none !important; }