/* style.css — Neon Drift */
:root{
  --bg0:#06030f;
  --bg1:#150830;
  --fg:#eaf2ff;
  --muted:#8b93c7;
  --accent:#5ff0ff;
  --accent2:#ff5b9a;
  --good:#8effc4;
  --warn:#ffe16b;
  --panel:rgba(18,10,38,0.72);
  --border:rgba(140,120,255,0.22);
  color-scheme: dark;
}
@media (prefers-color-scheme: light){
  :root{
    --bg0:#eef1fb;
    --bg1:#dde3f7;
    --fg:#161033;
    --muted:#5a5680;
    --accent:#0a8fb5;
    --accent2:#d6337a;
    --good:#1f9d63;
    --warn:#c98a00;
    --panel:rgba(255,255,255,0.82);
    --border:rgba(40,30,120,0.18);
    color-scheme: light;
  }
}
html[data-theme="light"]{
  --bg0:#eef1fb; --bg1:#dde3f7; --fg:#161033; --muted:#5a5680;
  --accent:#0a8fb5; --accent2:#d6337a; --good:#1f9d63; --warn:#c98a00;
  --panel:rgba(255,255,255,0.82); --border:rgba(40,30,120,0.18);
  color-scheme: light;
}
html[data-theme="dark"]{
  --bg0:#06030f; --bg1:#150830; --fg:#eaf2ff; --muted:#8b93c7;
  --accent:#5ff0ff; --accent2:#ff5b9a; --good:#8effc4; --warn:#ffe16b;
  --panel:rgba(18,10,38,0.72); --border:rgba(140,120,255,0.22);
  color-scheme: dark;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; height:100%; }
body{
  background:var(--bg0);
  color:var(--fg);
  font-family:ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow:hidden;
  touch-action:manipulation;
  -webkit-tap-highlight-color:transparent;
}

#app{
  position:fixed;
  inset:0;
  display:block;
}

#game{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  touch-action:none;
}

/* HUD */
#hud{
  position:absolute;
  top:0; left:0; right:0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:max(10px, env(safe-area-inset-top)) 14px 10px;
  pointer-events:none;
  z-index:5;
  font-variant-numeric: tabular-nums;
}
.hud-block{
  display:flex;
  flex-direction:column;
  line-height:1;
}
.hud-block.right{ align-items:flex-end; }
.hud-label{
  font-size:10px;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:4px;
}
.hud-value{
  font-size:22px;
  font-weight:700;
  color:var(--fg);
  text-shadow:0 0 12px rgba(95,240,255,0.35);
}
.hud-center{
  display:flex;
  gap:4px;
}
.heart{
  font-size:18px;
  color:var(--accent2);
  text-shadow:0 0 10px rgba(255,91,154,0.6);
  transition: transform .2s;
}
.heart:nth-child(odd){ transform: translateY(-1px); }

/* Level up flash */
.levelup{
  position:absolute;
  top:42%; left:50%;
  transform:translate(-50%,-50%) scale(.8);
  font-size:34px;
  font-weight:800;
  letter-spacing:0.18em;
  color:var(--accent);
  text-shadow:0 0 24px rgba(95,240,255,0.7);
  opacity:0;
  pointer-events:none;
  z-index:6;
}
.levelup.show{
  animation: lvflash 1.3s ease-out forwards;
}
@keyframes lvflash{
  0%{ opacity:0; transform:translate(-50%,-50%) scale(.6); }
  20%{ opacity:1; transform:translate(-50%,-50%) scale(1); }
  80%{ opacity:1; transform:translate(-50%,-50%) scale(1.05); }
  100%{ opacity:0; transform:translate(-50%,-60%) scale(1.1); }
}

/* Screens */
.screen{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:10;
  background:radial-gradient(120% 80% at 50% 30%, rgba(20,8,46,0.2), rgba(6,3,15,0.78));
  backdrop-filter: blur(2px);
  animation: fadeIn .35s ease;
}
html[data-theme="light"] .screen{
  background:radial-gradient(120% 80% at 50% 30%, rgba(255,255,255,0.2), rgba(238,241,251,0.86));
}
.screen.hidden{ display:none; }
@keyframes fadeIn{ from{opacity:0;} to{opacity:1;} }

.screen-inner{
  text-align:center;
  padding:28px 22px;
  max-width:420px;
  width:88%;
}

.title{
  margin:0 0 6px;
  font-size:clamp(40px, 11vw, 72px);
  font-weight:900;
  letter-spacing:0.04em;
  line-height:0.95;
  color:var(--fg);
}
.title span{
  display:inline-block;
  margin-left:0.12em;
  color:var(--accent);
  text-shadow:0 0 24px rgba(95,240,255,0.55);
}
html[data-theme="light"] .title span{ text-shadow:0 0 14px rgba(10,143,181,0.35); }

.tagline{
  margin:0 0 28px;
  color:var(--muted);
  font-size:15px;
  letter-spacing:0.02em;
}

.btn{
  font:inherit;
  font-weight:700;
  font-size:16px;
  letter-spacing:0.04em;
  padding:14px 30px;
  border:none;
  border-radius:14px;
  cursor:pointer;
  transition: transform .12s ease, box-shadow .2s ease, filter .2s;
  -webkit-tap-highlight-color:transparent;
}
.btn.primary{
  background:linear-gradient(135deg, var(--accent), #b58bff);
  color:#06121a;
  box-shadow:0 8px 28px rgba(95,240,255,0.35), inset 0 1px 0 rgba(255,255,255,0.5);
}
html[data-theme="light"] .btn.primary{ color:#fff; }
.btn.primary:hover{ transform:translateY(-2px); box-shadow:0 12px 34px rgba(95,240,255,0.45); }
.btn.primary:active{ transform:translateY(0) scale(.98); }
.btn:focus-visible{ outline:2px solid var(--fg); outline-offset:3px; }

.controls{
  margin-top:26px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  color:var(--muted);
  font-size:14px;
}
.ctrl{ display:flex; align-items:center; gap:6px; flex-wrap:wrap; justify-content:center; }
.key{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:26px;
  height:26px;
  padding:0 7px;
  border:1px solid var(--border);
  border-radius:7px;
  background:var(--panel);
  color:var(--fg);
  font-size:13px;
  font-weight:600;
  box-shadow:0 1px 0 rgba(255,255,255,0.05) inset, 0 2px 6px rgba(0,0,0,0.25);
}
.ctrl-sub{ font-size:12px; opacity:0.85; }

.over-title{
  margin:0 0 18px;
  font-size:clamp(32px, 8vw, 48px);
  font-weight:900;
  letter-spacing:0.06em;
  color:var(--accent2);
  text-shadow:0 0 26px rgba(255,91,154,0.45);
}
.result{
  display:flex;
  justify-content:center;
  gap:22px;
  margin:0 0 28px;
  flex-wrap:wrap;
}
.result > div{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
}
.result-label{
  font-size:10px;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--muted);
}
.result-value{
  font-size:26px;
  font-weight:800;
  font-variant-numeric: tabular-nums;
  color:var(--fg);
}

@media (max-width:360px){
  .hud-value{ font-size:18px; }
  .title{ font-size:42px; }
}