:root{--bg:#02030c;--ink:#eaf6ff;--dim:rgba(214,226,255,.62);--cyan:#6ff3ff;--vio:#a58bff;--pink:#ff6fd8;--gold:#ffd36b}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);overflow:hidden;color:var(--ink);
  font-family:ui-rounded,"SF Pro Rounded","Nunito","Segoe UI",system-ui,-apple-system,sans-serif;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;touch-action:none;overscroll-behavior:none}
canvas{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none}
body.playing{cursor:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
button:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

#hud{position:fixed;left:0;right:0;top:0;padding:calc(env(safe-area-inset-top) + 14px) 22px 0;display:flex;justify-content:space-between;align-items:flex-start;pointer-events:none;opacity:0;transition:opacity .4s}
#hud.show{opacity:1}
#hud .r{text-align:right}
.lbl{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--dim)}
.val{font-size:30px;font-weight:700;line-height:1.15;font-variant-numeric:tabular-nums;text-shadow:0 0 18px rgba(111,243,255,.45)}
#combo{position:absolute;left:50%;top:calc(env(safe-area-inset-top) + 18px);transform:translateX(-50%);font-size:24px;font-weight:800;color:var(--gold);text-shadow:0 0 18px rgba(255,211,107,.7);opacity:0;transition:opacity .25s}
#combo.on{opacity:1}
#comboBar{display:block;height:3px;width:56px;margin:2px auto 0;border-radius:3px;background:var(--gold);box-shadow:0 0 10px rgba(255,211,107,.8);transform-origin:50% 50%}
#combo.pop{animation:pop .28s ease-out}
@keyframes pop{0%{transform:translateX(-50%) scale(1.6)}100%{transform:translateX(-50%) scale(1)}}

#banner{position:fixed;left:0;right:0;top:27%;transform:translateY(-50%);text-align:center;pointer-events:none;opacity:0}
#banner.go{animation:banner 1.5s cubic-bezier(.2,.8,.2,1) both}
#bannerBig{font-size:clamp(34px,10vw,64px);font-weight:800;letter-spacing:.22em;padding-left:.22em;text-shadow:0 0 30px rgba(140,160,255,.8),0 0 80px rgba(140,160,255,.4)}
#bannerSmall{margin-top:8px;font-size:clamp(14px,4vw,18px);letter-spacing:.08em;color:var(--dim)}
@keyframes banner{0%{opacity:0;transform:translateY(-50%) scale(1.25);filter:blur(8px)}18%{opacity:1;transform:translateY(-50%) scale(1);filter:blur(0)}70%{opacity:1}100%{opacity:0;transform:translateY(-50%) scale(.96)}}

.panel{position:fixed;left:50%;top:50%;width:min(90vw,400px);text-align:center;transform:translate(-50%,-50%) scale(.95);opacity:0;pointer-events:none;transition:opacity .45s,transform .45s cubic-bezier(.2,.8,.2,1)}
.panel.show{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}
#title::before{content:"";position:absolute;inset:-14% -22%;z-index:-1;background:radial-gradient(closest-side,rgba(2,6,18,.78),rgba(2,6,18,.5) 60%,rgba(2,6,18,0));pointer-events:none}
.glass{padding:30px 26px 24px;border-radius:30px;background:rgba(6,12,30,.62);-webkit-backdrop-filter:blur(16px) saturate(140%);backdrop-filter:blur(16px) saturate(140%);border:1px solid rgba(255,255,255,.09);box-shadow:0 30px 90px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.07)}

.logo{position:relative;display:inline-block;font-size:clamp(60px,18vw,116px);font-weight:800;letter-spacing:.16em;padding-left:.16em;line-height:1;
  background:linear-gradient(100deg,#fff2a0,#9ff3cf 52%,#b9a8ff);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 26px rgba(170,230,200,.45))}
.sub{margin-top:2px;font-size:clamp(15px,4.6vw,22px);font-weight:700;letter-spacing:.9em;padding-left:.9em;color:#ffe680;text-shadow:0 0 18px rgba(255,230,128,.6)}
.logo::before,.logo::after{content:"ECHO";position:absolute;inset:0;padding-left:.16em;background:none;color:transparent;-webkit-text-stroke:1px rgba(190,240,215,.5);animation:echo 3.4s ease-out infinite;pointer-events:none}
.logo::after{animation-delay:1.7s}
@keyframes echo{0%{transform:scale(1);opacity:.85}100%{transform:scale(1.42);opacity:0}}
.tag{margin-top:14px;text-shadow:0 1px 10px rgba(0,0,0,.8);font-size:17px;line-height:1.5;color:var(--dim)}
.modes{display:inline-flex;margin-top:24px;padding:4px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09)}
.modes button{padding:9px 17px;border-radius:999px;font-size:14px;color:var(--dim);transition:background .2s,color .2s}
.modes button.on{background:rgba(255,255,255,.14);color:var(--ink)}
.primary{display:block;width:100%;margin-top:20px;padding:17px 20px;border-radius:999px;font-size:18px;font-weight:800;letter-spacing:.1em;color:#07060f;
  background:linear-gradient(100deg,#ffe680,#a8f5cf 55%,#b9c4ff);box-shadow:inset 0 0 0 1px rgba(255,255,255,.3),0 10px 44px rgba(160,230,200,.4);transition:transform .15s}
.primary:active{transform:scale(.97)}
.best{margin-top:16px;font-size:14px;color:var(--dim);min-height:1.2em;text-shadow:0 1px 8px rgba(0,0,0,.8)}
.hint{margin-top:8px;font-size:13px;color:rgba(214,226,255,.6);text-shadow:0 1px 8px rgba(0,0,0,.8)}

.eyebrow{font-size:13px;letter-spacing:.2em;text-transform:uppercase;color:var(--pink)}
.bigscore{margin-top:8px;font-size:clamp(54px,16vw,76px);font-weight:800;line-height:1.05;font-variant-numeric:tabular-nums;
  background:linear-gradient(100deg,#7ff6ff,#fff 50%,#ffb8ec);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 22px rgba(140,200,255,.45))}
.newbest{display:inline-block;margin-top:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.16em;color:#221a00;background:var(--gold);box-shadow:0 0 24px rgba(255,211,107,.6)}
.stats{display:flex;justify-content:center;gap:26px;margin-top:18px}
.stats b{display:block;font-size:22px;font-variant-numeric:tabular-nums}
.stats span{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.row{display:flex;gap:10px;margin-top:12px}
.soft{flex:1;padding:13px 14px;border-radius:999px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);font-size:15px}
.soft:active{background:rgba(255,255,255,.12)}
#pause .glass{font-size:20px;font-weight:700;letter-spacing:.1em}
#pause small{display:block;margin-top:8px;font-size:14px;font-weight:400;letter-spacing:0;color:var(--dim)}
@media (max-height:480px){.logo{font-size:50px}.sub{font-size:13px}.tag{margin-top:6px;font-size:14px}.tag br{display:none}.modes{margin-top:10px}.primary{margin-top:10px;padding:12px}.best{margin-top:8px}.hint{display:none}
  .glass{padding:12px 22px}.bigscore{font-size:36px;margin-top:0}.rank{margin-top:4px}.rankbar{display:none}.stats{margin-top:6px}.stats b{font-size:17px}.row{margin-top:8px}.soft{padding:9px}#bannerBig{font-size:30px}#banner{top:22%}}
#mute{position:fixed;right:calc(env(safe-area-inset-right) + 14px);bottom:calc(env(safe-area-inset-bottom) + 14px);width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);display:grid;place-items:center;opacity:.75}
#mute svg{width:20px;height:20px;fill:none;stroke:var(--ink);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
#mute.off .wave{display:none}
#mute:not(.off) .x{display:none}
body.playing #mute{opacity:.3}
#pauseBtn{position:fixed;right:calc(env(safe-area-inset-right) + 68px);bottom:calc(env(safe-area-inset-bottom) + 14px);width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);display:none;place-items:center;opacity:.3}
#pauseBtn svg{width:18px;height:18px;fill:var(--ink)}
body.playing #pauseBtn{display:grid}
#home{position:fixed;left:calc(env(safe-area-inset-left) + 16px);bottom:calc(env(safe-area-inset-bottom) + 24px);font-size:13px;letter-spacing:.06em;color:var(--dim);text-decoration:none;transition:opacity .3s}
#home[hidden]{display:none}
body.playing #home{opacity:0;pointer-events:none}
.rank{margin-top:14px;font-size:13px;color:var(--dim)}
.rank b{display:inline-block;margin-right:8px;padding:4px 12px;border-radius:999px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);border:1px solid rgba(165,139,255,.6);background:rgba(165,139,255,.16);box-shadow:0 0 18px rgba(165,139,255,.35)}
.rankbar{height:4px;margin:10px auto 0;width:70%;border-radius:4px;background:rgba(255,255,255,.1);overflow:hidden}
.rankbar i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,#7ff6ff,#a58bff,#ff6fd8);transform-origin:0 50%;transition:transform .9s cubic-bezier(.2,.8,.2,1) .3s}