:root{
  --bg:#17181b; --panel:#1e2024e6; --line:#33363d;
  --fg:#e6e7ea; --dim:#9aa0aa; --accent:#c8a15a;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--fg);
  font:14px/1.45 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}
#view{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none}

#loading{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:#17181bcc;color:var(--dim);z-index:40;pointer-events:none;transition:opacity .2s}
#loading.hidden{opacity:0}

.icon-btn{position:fixed;top:calc(env(safe-area-inset-top) + 10px);right:10px;z-index:30;
  width:42px;height:42px;font-size:18px;border-radius:10px}

#panel{position:fixed;top:calc(env(safe-area-inset-top) + 10px);right:10px;z-index:20;
  width:270px;max-height:calc(100dvh - 110px);overflow-y:auto;padding:14px;padding-top:56px;
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
#panel.hidden{display:none}
#panel section{padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line)}
#panel section:last-of-type{border-bottom:0;margin-bottom:4px}
.hd{display:block;margin-bottom:7px;color:var(--dim);font-size:11px;letter-spacing:.09em;text-transform:uppercase}

button,select,input[type=text]{font:inherit;color:var(--fg);background:#2a2d34;
  border:1px solid var(--line);border-radius:9px;padding:9px 11px;min-height:40px;cursor:pointer}
button:active{background:#353942}
button.primary{background:var(--accent);color:#17181b;border-color:var(--accent);font-weight:600}
button.on{background:var(--accent);color:#17181b;border-color:var(--accent)}
select,input[type=text]{width:100%;cursor:auto}
input[type=text]{text-align:center;letter-spacing:.05em}

.row{display:flex;gap:7px;margin-bottom:7px}
.row>button{flex:1}
.row.presets>button{padding:8px 4px;font-size:13px}
.row.slider{align-items:center}
.row.slider>span{width:62px;color:var(--dim);font-size:12px}
.row.slider>input{flex:1}
input[type=range]{accent-color:var(--accent);height:26px}
.chk{display:flex;align-items:center;gap:9px;padding:5px 0;color:var(--fg);cursor:pointer}
.chk input{width:18px;height:18px;accent-color:var(--accent)}
.hint{margin:0;color:var(--dim);font-size:11px;line-height:1.6}
kbd{background:#2a2d34;border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:10px}

#timerbar{position:fixed;left:0;right:0;bottom:0;z-index:25;
  display:flex;align-items:center;gap:12px;
  padding:10px 14px calc(env(safe-area-inset-bottom) + 10px);
  background:var(--panel);border-top:1px solid var(--line)}
#timerbar[hidden]{display:none}
#timer-progress{position:absolute;left:0;top:0;height:2px;width:0;background:var(--accent)}
#timer-remaining{flex:1;font-size:24px;font-variant-numeric:tabular-nums;letter-spacing:.04em}

@media (max-width:640px){
  #panel{width:auto;left:10px;right:10px;max-height:calc(100dvh - 160px)}
  #timer-remaining{font-size:20px}
}