:root{
  --bg:#E6EDF3; --ink:#1F2A44; --sub:#56627A; --sand:#D9A441; --sand-d:#A8721C;
  --glass:#FFFFFF; --line:#B9C6D4; --hot:#C8432F; --card:#F5F8FB;
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#141A2B; --ink:#EEF2F8; --sub:#A3AEC4; --sand:#E8B85A; --sand-d:#C48B2C;
    --glass:#1E2740; --line:#3A4766; --hot:#F0735C; --card:#1A2236; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#141A2B; --ink:#EEF2F8; --sub:#A3AEC4; --sand:#E8B85A; --sand-d:#C48B2C;
  --glass:#1E2740; --line:#3A4766; --hot:#F0735C; --card:#1A2236; color-scheme:dark;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",sans-serif;line-height:1.7;font-size:16px}
main{max-width:520px;margin:0 auto;padding:28px 20px 56px}
h1{font-family:"Dela Gothic One","Hiragino Sans",sans-serif;font-weight:400;
  font-size:clamp(2.4rem,11vw,3.4rem);line-height:1.05;margin:0 0 6px;letter-spacing:.02em}
h1 span{display:block;font-size:.42em;letter-spacing:.08em;color:var(--sub);margin-top:10px;font-family:"Zen Kaku Gothic New",sans-serif;font-weight:700}
h2{font-family:"Dela Gothic One","Hiragino Sans",sans-serif;font-weight:400;font-size:1.45rem;margin:0 0 4px;line-height:1.3}
p.lead{color:var(--sub);margin:0 0 20px;font-size:.95rem}

.stage{display:flex;flex-direction:column;align-items:center;gap:10px;margin:22px 0 8px;text-align:center}
svg.hg{width:min(72vw,260px);height:auto;display:block}
.count .big{font-family:"Dela Gothic One",sans-serif;font-size:clamp(1.6rem,8vw,2.3rem);line-height:1.1;font-variant-numeric:tabular-nums;word-break:break-all}
.count .unit{font-size:.85rem;color:var(--sub)}
.count .pct{font-family:"Dela Gothic One",sans-serif;font-size:1.35rem;color:var(--sand-d);margin-top:8px}
.count .empty{color:var(--sub);font-size:.95rem}
.count .piled{font-size:.82rem;color:var(--hot);margin-top:6px}

.rainbow-toggle{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;font-size:.85rem;min-height:36px;border-radius:999px}
@keyframes hueSpin{to{filter:hue-rotate(360deg) saturate(1.6)}}
.hg.rainbow #sandGroup{animation:hueSpin 2.4s linear infinite}
@media (prefers-reduced-motion:reduce){.hg.rainbow #sandGroup{animation-duration:12s}}

.particle{animation:burstFly .9s cubic-bezier(.2,.7,.3,1) forwards}
@keyframes burstFly{
  0%{transform:translate(0,0) scale(1);opacity:1}
  70%{opacity:1}
  100%{transform:translate(var(--dx),var(--dy)) scale(.4);opacity:0}
}
@media (prefers-reduced-motion:reduce){.particle{animation:none;opacity:0}}

form,.panel{background:var(--card);border:2px solid var(--line);border-radius:18px;padding:18px;margin-top:18px}
label{display:block;font-weight:700;font-size:.9rem;margin:0 0 6px}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
input[type=date],input[type=number],select{font:inherit;color:var(--ink);background:var(--glass);border:2px solid var(--line);
  border-radius:10px;padding:10px 12px;width:100%;min-height:46px}
.seg{display:flex;gap:8px}
.seg button{flex:1}
button{font:inherit;font-weight:700;cursor:pointer;border-radius:12px;min-height:46px;padding:10px 14px;
  border:2px solid var(--ink);background:var(--glass);color:var(--ink)}
button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
button.go{width:100%;background:var(--sand);border-color:var(--sand-d);color:#1F2A44;font-size:1.05rem}
:focus-visible{outline:3px solid var(--hot);outline-offset:2px}

.waste-result{margin-top:14px;display:none}
.waste-result.on{display:block}
.grains{font-family:"Dela Gothic One",sans-serif;font-size:clamp(1.8rem,9vw,2.6rem);color:var(--hot);line-height:1.1;font-variant-numeric:tabular-nums}
.rank{display:inline-block;margin-top:8px;padding:4px 12px;border-radius:999px;background:var(--ink);color:var(--bg);font-weight:700;font-size:.9rem}
.note{font-size:.85rem;color:var(--sub);margin-top:6px}

.share{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;margin-top:22px;text-decoration:none;
  background:var(--ink);color:var(--bg);font-weight:700;border-radius:14px;min-height:54px;font-size:1.05rem}
.share svg{width:20px;height:20px;fill:currentColor}
.share[aria-disabled="true"]{opacity:.4;pointer-events:none}
footer{margin-top:28px;font-size:.78rem;color:var(--sub)}

.stream{stroke-dasharray:3 5;animation:fall .6s linear infinite}
@keyframes fall{to{stroke-dashoffset:-16}}
@media (prefers-reduced-motion:reduce){.stream{animation:none}}