:root{
  --bg:#070B12;
  --panel:#0C141F;
  --line:#1B2A3D;
  --line-soft:#13202F;
  --ion:#4FE0C8;
  --amber:#FFB454;
  --danger:#FF5470;
  --text:#C9D6E3;
  --dim:#5E7287;
  --display:'Chakra Petch',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{background:var(--bg);color:var(--text);font-family:var(--mono);overflow:hidden;-webkit-user-select:none;user-select:none}
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(1200px 700px at 70% -10%, rgba(79,224,200,.06), transparent 60%),
    radial-gradient(900px 600px at 10% 110%, rgba(255,180,84,.05), transparent 60%),
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(255,255,255,.012) 3px 4px);
}
.screen{position:fixed;inset:0;z-index:5;display:none;flex-direction:column;align-items:center;justify-content:center;padding:24px;background:rgba(7,11,18,.92)}
.screen.active{display:flex}
.frame{position:fixed;inset:14px;pointer-events:none;z-index:6}
.frame i{position:absolute;width:26px;height:26px;border:2px solid var(--ion);opacity:.55}
.frame i:nth-child(1){top:0;left:0;border-right:0;border-bottom:0}
.frame i:nth-child(2){top:0;right:0;border-left:0;border-bottom:0}
.frame i:nth-child(3){bottom:0;left:0;border-right:0;border-top:0}
.frame i:nth-child(4){bottom:0;right:0;border-left:0;border-top:0}
h1.brand{font-family:var(--display);font-weight:700;font-size:clamp(44px,8vw,84px);letter-spacing:.06em;color:#EAF4F2;line-height:1;text-transform:lowercase}
h1.brand span{color:var(--ion)}
.tagline{color:var(--dim);font-size:12px;letter-spacing:.34em;text-transform:uppercase;margin-top:10px}
.eyebrow{font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--ion);margin-bottom:14px}
.modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;width:min(760px,100%);margin-top:40px}
.mode-card{
  background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:20px 18px;cursor:pointer;
  text-align:left;position:relative;transition:border-color .15s,transform .15s,box-shadow .15s;
  color:var(--text);font-family:var(--mono);
}
.mode-card:hover,.mode-card:focus-visible{border-color:var(--ion);transform:translateY(-3px);box-shadow:0 10px 30px -14px rgba(79,224,200,.35);outline:none}
.mode-card h3{font-family:var(--display);font-weight:600;font-size:19px;letter-spacing:.06em;color:#EAF4F2;margin-bottom:7px}
.mode-card p{font-size:12px;color:var(--dim);line-height:1.55;min-height:50px}
.mode-card .best{margin-top:12px;font-size:11px;color:var(--amber);letter-spacing:.08em}
.mode-card .key{position:absolute;top:14px;right:14px;font-size:10px;color:var(--dim);border:1px solid var(--line);border-radius:3px;padding:2px 6px}
.menu-foot{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.hint{margin-top:22px;font-size:11px;color:var(--dim);letter-spacing:.1em;text-align:center;line-height:2}
.hint b{color:var(--text);border:1px solid var(--line);border-radius:3px;padding:1px 7px;font-weight:400}
.btn{
  font-family:var(--display);font-weight:600;letter-spacing:.14em;text-transform:uppercase;font-size:13px;
  color:var(--ion);background:transparent;border:1px solid var(--ion);border-radius:4px;padding:12px 26px;cursor:pointer;
  transition:background .15s,color .15s;
}
.btn:hover,.btn:focus-visible{background:var(--ion);color:#04110E;outline:none}
.btn.ghost{border-color:var(--line);color:var(--dim)}
.btn.ghost:hover{border-color:var(--text);color:var(--text);background:transparent}
.btn.solid{background:var(--ion);color:#04110E}
.btn.solid:hover{background:#6FF0DA}
.panel{width:min(560px,100%);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:30px 30px 26px;max-height:86vh;overflow:auto}
.panel h2{font-family:var(--display);font-weight:600;letter-spacing:.1em;font-size:22px;color:#EAF4F2;margin-bottom:24px}
.field{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line-soft)}
.field:last-of-type{border-bottom:0}
.field label{font-size:12px;letter-spacing:.06em;color:var(--text)}
.field small{display:block;color:var(--dim);font-size:10px;margin-top:3px}
.field .val{font-size:11px;color:var(--ion);min-width:42px;text-align:right}
input[type=range]{-webkit-appearance:none;appearance:none;width:170px;height:3px;background:var(--line);border-radius:2px;outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--ion);border:2px solid #04110E;box-shadow:0 0 8px rgba(79,224,200,.6)}
input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--ion);border:2px solid #04110E}
.seg{display:flex;gap:6px}
.seg button{font-family:var(--mono);font-size:11px;color:var(--dim);background:transparent;border:1px solid var(--line);border-radius:3px;padding:6px 10px;cursor:pointer}
.seg button.on{color:#04110E;background:var(--ion);border-color:var(--ion)}
.swatches{display:flex;gap:8px}
.swatch{width:20px;height:20px;border-radius:50%;border:2px solid transparent;cursor:pointer}
.swatch.on{border-color:#fff}
.toggle{width:44px;height:22px;border-radius:22px;border:1px solid var(--line);background:transparent;cursor:pointer;position:relative}
.toggle::after{content:'';position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--dim);transition:transform .15s,background .15s}
.toggle.on{border-color:var(--ion)}
.toggle.on::after{transform:translateX(22px);background:var(--ion)}
.panel .row{display:flex;gap:12px;margin-top:26px;justify-content:flex-end}
/* ---------- game layer ---------- */
#game{display:none;position:fixed;inset:0;z-index:2}
#game.active{display:block}
#three{position:absolute;inset:0}
#three canvas{display:block;width:100%;height:100%;cursor:none}
.hud{
  position:absolute;top:0;left:0;right:0;z-index:3;pointer-events:none;
  display:flex;justify-content:center;gap:clamp(16px,4.5vw,58px);padding:18px 16px 12px;
  background:linear-gradient(180deg, rgba(7,11,18,.72), transparent);
}
.hud .stat{text-align:center}
.hud .stat b{display:block;font-family:var(--display);font-weight:600;font-size:clamp(17px,2.5vw,25px);color:#EAF4F2;letter-spacing:.04em;text-shadow:0 1px 6px rgba(0,0,0,.6)}
.hud .stat span{font-size:10px;letter-spacing:.26em;color:#B8C6D4;text-transform:uppercase;text-shadow:0 1px 4px rgba(0,0,0,.6)}
.hud .stat b.time{color:var(--ion)}
.hud .stat b.warn{color:var(--danger)}
#ammoBar{position:absolute;bottom:22px;right:26px;z-index:3;pointer-events:none;text-align:right}
#ammoBar b{display:block;font-family:var(--display);font-weight:700;font-size:34px;color:#EAF4F2;letter-spacing:.06em;text-shadow:0 1px 8px rgba(0,0,0,.7)}
#ammoBar b em{font-style:normal;font-size:16px;color:#B8C6D4}
#ammoBar span{font-size:10px;letter-spacing:.26em;color:#B8C6D4;text-transform:uppercase;text-shadow:0 1px 4px rgba(0,0,0,.6)}
#ammoBar.reloading b{color:var(--amber)}
#modeTag{position:absolute;bottom:18px;left:22px;z-index:3;pointer-events:none;font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:#B8C6D4;text-shadow:0 1px 4px rgba(0,0,0,.6)}
#xhair{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;pointer-events:none;filter:drop-shadow(0 1px 2px rgba(0,0,0,.7))}
#hitmark{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) rotate(45deg);z-index:3;pointer-events:none;width:18px;height:18px;opacity:0}
#hitmark::before,#hitmark::after{content:'';position:absolute;background:#fff}
#hitmark::before{left:8px;top:0;width:2px;height:18px}
#hitmark::after{top:8px;left:0;width:18px;height:2px}
#hitmark.show{animation:hm .18s ease-out}
@keyframes hm{0%{opacity:1;transform:translate(-50%,-50%) rotate(45deg) scale(1.4)}100%{opacity:0;transform:translate(-50%,-50%) rotate(45deg) scale(.8)}}
#countdown{
  position:absolute;inset:0;z-index:4;display:none;align-items:center;justify-content:center;
  font-family:var(--display);font-weight:700;font-size:clamp(90px,18vw,180px);
  color:var(--ion);text-shadow:0 0 40px rgba(79,224,200,.5);pointer-events:none;
}
#clickCatch{
  position:absolute;inset:0;z-index:4;display:none;align-items:center;justify-content:center;
  background:rgba(7,11,18,.6);font-family:var(--display);letter-spacing:.2em;color:var(--ion);
  font-size:18px;text-transform:uppercase;cursor:pointer;
}
/* ---------- results ---------- */
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;width:min(760px,100%);margin-top:26px}
.res-cell{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:16px 14px;text-align:center}
.res-cell b{display:block;font-family:var(--display);font-weight:600;font-size:24px;color:#EAF4F2}
.res-cell span{font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--dim)}
.res-score{font-family:var(--display);font-weight:700;font-size:clamp(56px,10vw,96px);color:var(--amber);line-height:1;text-shadow:0 0 50px rgba(255,180,84,.35)}
#newBest{display:none;margin-top:10px;font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--amber);animation:pulse 1.1s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.res-actions{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.storage-note{position:fixed;bottom:18px;left:0;right:0;text-align:center;font-size:10px;color:#33445A;letter-spacing:.12em;z-index:5;pointer-events:none}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media (max-width:640px){.field{flex-wrap:wrap}input[type=range]{width:130px}}

/* ---------- loader ---------- */
#loader{
  position:fixed;inset:0;z-index:50;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:18px;background:var(--bg);transition:opacity .4s;
}
#loader.done{opacity:0;pointer-events:none}
.brandmini{font-family:var(--display);font-weight:700;font-size:34px;letter-spacing:.06em;color:#EAF4F2}
.brandmini span{color:var(--ion)}
.loadbar{width:min(300px,70vw);height:3px;background:var(--line);border-radius:2px;overflow:hidden}
.loadbar i{display:block;height:100%;width:0%;background:var(--ion);transition:width .25s}
#loadText{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--dim)}