/* ══════════════════════════════════════════
   ROOT & RESET
══════════════════════════════════════════ */
:root{
  --ink:    #05050f;
  --paper:  #0a0a1e;
  --cyan:   #00e5ff;
  --green:  #00ff9d;
  --red:    #ff2052;
  --yellow: #ffd600;
  --dim:    rgba(255,255,255,0.18);
  --font-d: Impact, 'Arial Narrow', sans-serif;
  --font-m: ui-monospace, Menlo, monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{width:100%;height:100%;overflow:hidden;background:var(--ink);color:#fff;font-family:var(--font-m)}
canvas{display:block;position:fixed;inset:0;width:100%;height:100%}

/* ══════════════════════════════════════════
   SCREENS
══════════════════════════════════════════ */
.scr{
  position:fixed;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  z-index:20;pointer-events:none;opacity:0;
  transition:opacity .35s ease;
}
.scr.on{opacity:1;pointer-events:all}

/* ══════════════════════════════════════════
   MENU
══════════════════════════════════════════ */
#s-menu{
  background:radial-gradient(ellipse 80% 70% at 50% 50%, #080820 0%, #05050f 100%);
}
#s-menu::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,229,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,229,255,.05) 1px,transparent 1px);
  background-size:50px 50px;
  animation:gridDrift 20s linear infinite;
}
@keyframes gridDrift{to{background-position:50px 50px}}

.m-wrap{position:relative;z-index:2;text-align:center;display:flex;flex-direction:column;align-items:center;gap:28px}

.m-tag{font-size:11px;letter-spacing:6px;color:var(--cyan);opacity:.6;text-transform:uppercase}

.m-title{
  font-family:var(--font-d);
  font-size:clamp(80px,14vw,160px);
  line-height:.88;
  background:linear-gradient(160deg,#fff 10%,var(--cyan) 50%,#fff 90%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  filter:drop-shadow(0 0 40px rgba(0,229,255,.5));
  animation:titleBreath 3.5s ease-in-out infinite alternate;
}
@keyframes titleBreath{
  from{filter:drop-shadow(0 0 30px rgba(0,229,255,.35))}
  to  {filter:drop-shadow(0 0 70px rgba(0,229,255,.8))}
}

.m-sub{font-size:13px;letter-spacing:4px;color:var(--dim);margin-top:-10px}

.m-rules{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;
  max-width:420px;width:100%;margin-top:4px;
}
.m-rule{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(0,229,255,.12);
  border-radius:10px;padding:12px 16px;
  font-size:12px;color:rgba(255,255,255,.65);line-height:1.55;
  text-align:left;
}
.m-rule b{color:var(--cyan)}

.btn{
  font-family:var(--font-d);font-size:22px;letter-spacing:3px;
  color:var(--ink);background:var(--cyan);
  border:none;border-radius:6px;padding:16px 56px;cursor:pointer;
  box-shadow:0 0 40px rgba(0,229,255,.5);
  transition:transform .15s,box-shadow .15s;
}
.btn:hover{transform:scale(1.06);box-shadow:0 0 70px rgba(0,229,255,.85)}
.btn:active{transform:scale(.97)}
.btn-ghost{
  background:transparent;color:var(--dim);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:none;font-family:var(--font-m);font-size:13px;padding:12px 36px;letter-spacing:2px;
}
.btn-ghost:hover{color:#fff;border-color:rgba(255,255,255,.35);box-shadow:none}

/* ══════════════════════════════════════════
   HUD
══════════════════════════════════════════ */
#hud{
  position:fixed;top:0;left:0;right:0;z-index:15;
  display:flex;align-items:flex-end;justify-content:space-between;
  padding:16px 28px 12px;
  background:linear-gradient(to bottom,rgba(5,5,15,.95) 50%,transparent);
  pointer-events:none;
  opacity:0;transition:opacity .3s;
}
#hud.on{opacity:1}
.hud-block{display:flex;flex-direction:column;align-items:flex-start;gap:3px;min-width:90px}
.hud-block.center{align-items:center}
.hud-block.right{align-items:flex-end}
.hud-lbl{font-size:9px;letter-spacing:4px;color:rgba(255,255,255,.3)}
.hud-val{font-family:var(--font-d);font-size:26px;color:var(--green);letter-spacing:1px}

#timer-big{
  font-family:var(--font-d);
  font-size:clamp(44px,7vw,68px);
  color:var(--green);
  letter-spacing:2px;
  transition:color .4s,filter .4s;
  line-height:1;
}
#timer-big.warn{color:var(--yellow);filter:drop-shadow(0 0 12px rgba(255,214,0,.7))}
#timer-big.crit{color:var(--red);filter:drop-shadow(0 0 16px rgba(255,32,82,.9));animation:critPulse .5s ease-in-out infinite alternate}
@keyframes critPulse{from{transform:scale(1)}to{transform:scale(1.06)}}

/* Difficulty badge */
#diff{
  position:fixed;top:16px;right:28px;z-index:16;
  font-family:var(--font-d);font-size:13px;letter-spacing:2px;
  color:var(--yellow);background:rgba(255,214,0,.08);
  border:1px solid rgba(255,214,0,.3);border-radius:4px;
  padding:5px 12px;pointer-events:none;
  opacity:0;transition:opacity .4s;
}
#diff.on{opacity:1}

/* Combo badge */
#combo{
  position:fixed;top:50%;left:50%;transform:translate(-50%,-120px);
  z-index:16;font-family:var(--font-d);font-size:clamp(28px,5vw,48px);
  color:var(--yellow);filter:drop-shadow(0 0 20px var(--yellow));
  pointer-events:none;opacity:0;transition:opacity .25s;
  letter-spacing:3px;
}
#combo.on{opacity:1}

/* Flash overlay */
#flash{
  position:fixed;inset:0;z-index:14;
  background:rgba(255,20,50,0);pointer-events:none;
  transition:background .08s;
}
#flash.on{background:rgba(255,20,50,.38)}

/* Vignette danger pulse */
#vignette{
  position:fixed;inset:0;z-index:13;pointer-events:none;
  border-radius:0;
  box-shadow:inset 0 0 0px rgba(255,32,82,0);
  transition:box-shadow .5s;
}
#vignette.danger{box-shadow:inset 0 0 120px rgba(255,32,82,.55)}
#vignette.critical{box-shadow:inset 0 0 160px rgba(255,32,82,.85);animation:vigPulse .6s ease-in-out infinite alternate}
@keyframes vigPulse{from{box-shadow:inset 0 0 100px rgba(255,32,82,.5)}to{box-shadow:inset 0 0 200px rgba(255,32,82,.95)}}

/* ══════════════════════════════════════════
   GAME OVER
══════════════════════════════════════════ */
#s-over{
  background:radial-gradient(ellipse 80% 70% at 50% 40%, #1a0010 0%,#05050f 70%);
}
#s-over::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,32,82,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,32,82,.05) 1px,transparent 1px);
  background-size:50px 50px;pointer-events:none;
}
.go-wrap{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;gap:24px;text-align:center;padding:40px 24px}
.go-tag{font-size:11px;letter-spacing:6px;color:var(--red);opacity:.7}
.go-title{font-family:var(--font-d);font-size:clamp(48px,10vw,100px);line-height:.9;color:#fff;filter:drop-shadow(0 0 40px rgba(255,32,82,.6))}
.go-stats{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:4px}
.stat{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);border-radius:12px;padding:18px 26px}
.stat-l{font-size:9px;letter-spacing:3px;color:rgba(255,255,255,.3);margin-bottom:8px}
.stat-v{font-family:var(--font-d);font-size:32px;color:var(--red);filter:drop-shadow(0 0 10px rgba(255,32,82,.5))}
.go-btns{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:8px}

/* ══════════════════════════════════════════
   NEW BEST
══════════════════════════════════════════ */
#new-best{
  position:fixed;top:40%;left:50%;transform:translate(-50%,-50%);
  z-index:22;font-family:var(--font-d);font-size:clamp(24px,5vw,44px);
  color:var(--yellow);letter-spacing:4px;
  filter:drop-shadow(0 0 30px var(--yellow));
  pointer-events:none;opacity:0;
  animation:none;
}


@keyframes newBestAnim{
  0%  {opacity:0;transform:translate(-50%,-50%) scale(.6)}
  15% {opacity:1;transform:translate(-50%,-50%) scale(1.15)}
  30% {transform:translate(-50%,-50%) scale(1)}
  80% {opacity:1}
  100%{opacity:0;transform:translate(-50%,-50%) scale(.9) translateY(-40px)}
}
#new-best{
  position:fixed;top:40%;left:50%;transform:translate(-50%,-50%);
  z-index:22;font-family:Impact, 'Arial Narrow', sans-serif;font-size:clamp(24px,5vw,44px);
  color:#ffd600;letter-spacing:4px;
  filter:drop-shadow(0 0 30px #ffd600);
  pointer-events:none;opacity:0;
}