:root{
  --bg:#ffffff; --text:#111114; --dim:#8e8e93; --faint:#c7c7cc; --line:#e5e5ea; --tap:#ececef;
  --green:#4fae63; --green-d:#3f9a53; --blue:#0a7aff;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{margin:0;height:100%;background:var(--bg)}
body{font:16px/1.4 -apple-system,"SF Pro Text",system-ui,Roboto,"Segoe UI",sans-serif;color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
button,select,input,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}

.app{position:relative;max-width:440px;margin:0 auto;height:100dvh;min-height:560px;display:flex;flex-direction:column;padding:env(safe-area-inset-top) 0 0}
.top{display:flex;justify-content:center;align-items:center;padding:clamp(14px,3.2dvh,28px) 20px 0}
.logo{display:block;height:auto;width:clamp(150px,50vw,190px)}

.display{position:relative;text-align:center;margin-top:clamp(10px,3dvh,30px)}
.num{height:64px;line-height:64px;font-size:clamp(40px,6.4dvh,52px);font-weight:300;letter-spacing:.5px;padding:0 64px;white-space:nowrap;overflow:hidden;font-variant-numeric:tabular-nums}
.num.empty{font-size:28px;color:var(--faint)}
.del{position:absolute;right:22px;top:12px;width:48px;height:40px;display:flex;align-items:center;justify-content:center;color:var(--dim)}
.del svg{width:32px;height:28px}
.del:active{color:var(--text)}

.meta{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:2px;min-height:44px;padding:0 16px}
.link{position:relative;color:var(--blue);font-size:17px;padding:10px 12px;border-radius:10px}
.link select{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer;font-size:16px}
.msgbtn{max-width:62%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.msgbtn.set{color:var(--text);background:#f2f2f7}
.msg{display:block;margin:2px auto 0;width:min(340px,86%);border:0;border-radius:14px;background:#f2f2f7;padding:10px 14px;font-size:16px;line-height:1.35;resize:none;outline:none}
.msg:focus{box-shadow:0 0 0 2px rgba(10,122,255,.35)}

.pad{flex:1 1 auto;min-height:250px;width:min(100%,360px);margin:clamp(2px,1dvh,10px) auto 0;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(4,1fr);align-items:center;justify-items:center}
.pad button{position:relative;height:min(100%,94px);aspect-ratio:1/1;max-width:94px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:50%;color:var(--text)}
.pad button::before{content:"";position:absolute;inset:0;border-radius:50%;background:var(--tap);opacity:0;transition:opacity .25s}
.pad button:active::before{opacity:1;transition:none}
.pad b{position:relative;font-size:clamp(34px,5.4dvh,46px);font-weight:300;line-height:1}
.pad i{position:relative;font-style:normal;font-size:11px;letter-spacing:2px;color:var(--dim);line-height:12px;height:12px;margin-top:2px}
.pad svg{position:relative;color:var(--text);width:30px;height:30px}

.go-wrap{display:flex;justify-content:center;margin:clamp(6px,1.4dvh,14px) 0 clamp(14px,2.4dvh,24px)}
.go{width:min(320px,86vw);height:58px;border-radius:29px;background:var(--green);color:#fff;font-size:19px;font-weight:600;letter-spacing:.1px;transition:opacity .15s,background .15s,transform .1s}
.go.off{opacity:.4}
.go:not(.off):active{background:var(--green-d);transform:scale(.985)}

.tabs{display:flex;justify-content:space-around;padding:8px 24px calc(8px + env(safe-area-inset-bottom));border-top:.5px solid var(--line);background:#fafafa}
.tabs > *{position:relative;display:flex;flex-direction:column;align-items:center;gap:3px;min-width:80px;color:var(--dim);font-size:12px;text-decoration:none;padding:4px 0;border-radius:10px}
.tabs svg{width:28px;height:28px}
.tabs > *:active{color:var(--text)}

[data-tip]{position:relative}
@media (hover:hover){
  [data-tip]:hover::after{content:attr(data-tip);position:absolute;left:50%;bottom:calc(100% + 6px);transform:translateX(-50%);background:#1c1c1e;color:#fff;font-size:12px;line-height:1.35;padding:7px 10px;border-radius:8px;width:max-content;max-width:220px;text-align:center;z-index:5;pointer-events:none;font-weight:400;letter-spacing:0;white-space:normal}
}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

.toast{position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translateX(-50%);background:#1c1c1e;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;z-index:20;max-width:86vw;text-align:center}
.sheet{position:fixed;left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));max-width:416px;margin:0 auto;background:#1c1c1e;color:#fff;border-radius:16px;padding:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;z-index:30}
.sheet p{margin:0;font-size:14px}
.sheet button{color:#0a84ff;font-weight:600;padding:6px 10px}

@media (min-width:600px){
  body{background:#f4f4f6}
  .app{background:#fff;margin-top:24px;height:calc(100dvh - 48px);border-radius:36px;box-shadow:0 0 0 1px var(--line);overflow:hidden}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}