:root{
  --bg:#05060f;--cyan:#19e6ff;--magenta:#ff2bd6;--violet:#8b5cff;--gold:#ffd166;--red:#ff4d6d;--text:#eef2ff;--muted:#8e97b8;
  --glass:rgba(10,12,30,.8);--font-d:'Orbitron','Noto Sans KR',sans-serif;--font-b:'Noto Sans KR','Orbitron',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font-b);overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:none;-webkit-tap-highlight-color:transparent}
#game{position:fixed;inset:0;display:block;touch-action:none}
.hidden{display:none!important}
.screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:10;animation:fadeIn .25s ease;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);background:rgba(5,6,15,.45)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

.panel{width:min(92vw,520px);max-height:92vh;overflow:auto;background:var(--glass);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.1);border-radius:22px;padding:26px 24px;display:flex;flex-direction:column;gap:16px;align-items:center;text-align:center}
.panel.small{width:min(90vw,360px)}
.panel h2{font-family:var(--font-d);font-weight:900;letter-spacing:.18em;font-size:1.3rem;background:linear-gradient(90deg,var(--cyan),var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent}

.btn{font-family:var(--font-d);font-weight:700;letter-spacing:.12em;cursor:pointer;border:0;color:var(--text);padding:14px 30px;border-radius:999px;font-size:.95rem;transition:transform .12s,filter .2s,opacity .2s;position:relative;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:10px;touch-action:manipulation}
.btn:active{transform:scale(.96)}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--violet) 55%,var(--magenta));box-shadow:0 10px 30px rgba(139,92,255,.45),0 0 0 1px rgba(255,255,255,.12) inset;color:#fff}
.btn-primary:hover{filter:brightness(1.12)}
.btn-ghost{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn.small{padding:9px 16px;font-size:.72rem}
.btn.home{color:var(--cyan);border-color:rgba(25,230,255,.35)}
.btn.daily{color:var(--gold);border-color:rgba(255,209,102,.4)}
.btn.daily small{font-family:var(--font-b);font-weight:400;font-size:.7rem;letter-spacing:0;color:#ffe7b0}
.pulse{animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 10px 30px rgba(139,92,255,.45)}50%{box-shadow:0 10px 44px rgba(25,230,255,.7)}}

/* title */
.title-wrap{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center;padding:20px}
.logo{font-family:var(--font-d);font-weight:900;font-size:clamp(3.4rem,16vw,7rem);letter-spacing:.08em;line-height:1;display:flex}
.logo span{background:linear-gradient(180deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 22px rgba(25,230,255,.5))}
.logo .flip{display:inline-block;transform:scaleY(-1) translateY(-.08em);background:linear-gradient(180deg,#fff,var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 22px rgba(255,43,214,.5));animation:flipin 3s ease-in-out infinite}
@keyframes flipin{0%,40%,100%{transform:scaleY(-1) translateY(-.08em)}50%,90%{transform:scaleY(1) translateY(0)}}
.tagline{color:var(--muted);letter-spacing:.14em;font-size:.85rem}
.tut-first{color:var(--gold);font-size:.85rem;animation:bob 1.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
.title-sub{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.title-foot{color:var(--muted);font-size:.78rem;letter-spacing:.06em}
.version-tag{display:flex;gap:12px;align-items:center;justify-content:center}
.version-tag span{font-family:var(--font-d);font-size:.7rem;letter-spacing:.25em;color:var(--muted);opacity:.8}

/* how to */
.guide-list{display:flex;flex-direction:column;gap:10px;width:100%;text-align:left}
.guide-row{display:flex;gap:12px;align-items:center;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:9px 12px;font-size:.86rem;line-height:1.55;color:#d6dcf5}
.guide-row b{color:var(--text)}
.g-ico{flex:0 0 44px;display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.ob{display:block;width:30px;height:16px;border-radius:3px}
.ob.spike{background:var(--red);clip-path:polygon(0 0,100% 50%,0 100%);box-shadow:0 0 10px var(--red)}
.ob.bar{background:var(--magenta);height:8px;box-shadow:0 0 10px var(--magenta)}
.ob.block{background:var(--violet);width:22px;box-shadow:0 0 10px var(--violet)}
.howto-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}

/* HUD */
.hud{position:fixed;inset:0;z-index:5;pointer-events:none;padding:calc(10px + env(safe-area-inset-top)) 14px calc(14px + env(safe-area-inset-bottom))}
.hud-top{display:flex;align-items:flex-start;justify-content:space-between}
.hud-mode{font-family:var(--font-d);font-size:.68rem;letter-spacing:.2em;color:var(--cyan)}
.hud-dist{font-family:var(--font-d);font-weight:900;font-size:1.7rem;letter-spacing:.05em;text-shadow:0 0 14px rgba(25,230,255,.5)}
.hud-speed{font-family:var(--font-d);font-weight:700;font-size:1rem;color:var(--muted);margin-top:4px;transition:color .2s}
.hud-speed.hot{color:var(--gold);text-shadow:0 0 12px rgba(255,209,102,.7)}
.hud-right{display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.hud-stars{font-family:var(--font-d);font-weight:700;color:var(--gold);font-size:1rem}
.hud .btn{pointer-events:auto}
.guide{position:absolute;left:50%;top:calc(76px + env(safe-area-inset-top));transform:translateX(-50%);width:min(92vw,420px);background:rgba(255,209,102,.1);border:1px solid rgba(255,209,102,.4);border-radius:14px;padding:10px 14px;font-size:.88rem;line-height:1.5;color:#fff3d6;text-align:center;animation:fadeIn .3s}
.brake{pointer-events:auto;position:absolute;right:calc(14px + env(safe-area-inset-right));bottom:calc(18px + env(safe-area-inset-bottom));width:84px;height:84px;border-radius:50%;border:2px solid rgba(25,230,255,.45);background:rgba(10,12,30,.75);color:var(--cyan);font-family:var(--font-d);font-weight:700;font-size:.62rem;letter-spacing:.18em;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none}
.brake-track{width:14px;height:34px;border-radius:7px;background:rgba(255,255,255,.08);overflow:hidden;display:flex;align-items:flex-end}
.brake-fill{width:100%;height:100%;background:linear-gradient(180deg,var(--cyan),#3b7bff);transition:height .1s linear}
.brake.active{background:rgba(59,123,255,.35);border-color:#7fc8ff;box-shadow:0 0 24px rgba(59,123,255,.6)}
.brake.empty{opacity:.45}

/* result */
.panel.result{gap:12px}
.result-title{font-family:var(--font-d);font-weight:900;font-size:1.6rem;letter-spacing:.16em;background:linear-gradient(90deg,var(--magenta),#fff 50%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.result-mode{font-family:var(--font-d);font-size:.75rem;letter-spacing:.2em;color:var(--muted)}
.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;width:100%}
.result-grid div{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:10px 6px}
.result-grid label{display:block;font-family:var(--font-d);font-size:.58rem;letter-spacing:.18em;color:var(--muted)}
.result-grid b{font-family:var(--font-d);font-size:1.1rem;font-weight:900;display:block;margin-top:4px}
.result-sub{color:var(--muted);font-size:.82rem}
.newbest{font-family:var(--font-d);color:var(--gold);font-weight:900;letter-spacing:.2em;animation:pulse-text 1s ease-in-out infinite}
@keyframes pulse-text{0%,100%{text-shadow:0 0 10px rgba(255,209,102,.5)}50%{text-shadow:0 0 26px rgba(255,209,102,1)}}
.result-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}

#toast{position:fixed;left:50%;bottom:120px;transform:translateX(-50%);background:rgba(10,12,30,.92);border:1px solid rgba(255,255,255,.14);color:var(--text);padding:10px 18px;border-radius:999px;font-size:.85rem;z-index:50;white-space:pre-line;text-align:center;max-width:90vw;pointer-events:none}

@media (max-width:640px){
  .btn{padding:14px 22px;font-size:.9rem;min-height:48px}
  .btn.small{padding:10px 14px;font-size:.72rem;min-height:42px}
  .result-grid{grid-template-columns:repeat(2,1fr)}
  .panel{padding:22px 16px}
  .hud-dist{font-size:1.4rem}
}
@media (prefers-reduced-motion: reduce){ .pulse,.logo .flip,.tut-first,.newbest{animation:none} .screen{animation:none} }