:root{--s1:#c0392b;--s2:#d35400;--s3:#e8b84b;--s4:#27684a;--gold:#e3b23d;--bg:rgba(12,17,23,.78);--surface:rgba(24,29,35,.94);--surface2:#252c32;--field:#20262c;--text:#f5f0e6;--muted:#b9b1a4;--line:rgba(255,255,255,.13);--primary:#e3b23d;--primaryText:#211a0a;--danger:#ff8c99;--radius:18px;--font:'Noto Sans TC',sans-serif;--display:'Outfit','Noto Sans TC',sans-serif}
[data-theme=light]{--bg:rgba(255,252,245,.78);--surface:rgba(255,255,255,.93);--surface2:#f3efe7;--field:#fffdfa;--text:#292319;--muted:#696156;--line:rgba(40,35,25,.14);--primary:#23312d;--primaryText:#fff;--danger:#b82d3f}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:none}
body{min-height:100dvh;color:var(--text);font:16px/1.55 var(--font);background:#111720}
button,input,select{font:inherit;color:inherit}
[hidden]{display:none!important}
.season-bg{position:fixed;inset:0;z-index:-3;background:linear-gradient(145deg,var(--s1),var(--s2) 35%,var(--s3) 70%,var(--s4))}
.season-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(var(--bg),var(--bg))}
.skip{position:fixed;left:12px;top:12px;transform:translateY(-150%);z-index:999;background:white;color:#222;padding:10px;border-radius:8px}
.skip:focus{transform:none}
#particles{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.particle{position:absolute;opacity:0;animation:fall var(--d) linear var(--delay) infinite;font-size:var(--size)}
.particle.up{animation-name:rise}
@keyframes fall{0%{transform:translate(0,-12vh) rotate(0);opacity:0}10%,90%{opacity:.35}100%{transform:translate(var(--sway),112vh) rotate(400deg);opacity:0}}
@keyframes rise{0%{transform:translate(0,112vh);opacity:0}10%,90%{opacity:.35}100%{transform:translate(var(--sway),-15vh) rotate(-400deg);opacity:0}}
.top{width:min(calc(100% - 32px),960px);height:76px;margin:auto;display:flex;justify-content:space-between;align-items:center;position:relative;z-index:20}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}
.brand svg{width:42px;height:42px;fill:none;stroke:var(--gold);stroke-width:3}
.brand b{display:block;font-size:20px}
.brand small{display:block;font:600 12px var(--display);letter-spacing:.18em;color:var(--muted)}
nav{position:relative}
.hamb,.menu-items button,.menu-items a{width:48px;height:48px;border:1px solid var(--line);background:var(--surface);border-radius:50%;display:grid;place-items:center;text-decoration:none}
.hamb{border-radius:11px;padding:12px;gap:4px}
.hamb i{width:22px;height:2px;background:currentColor}
.menu-items{position:absolute;right:0;top:56px;display:grid;gap:8px;opacity:0;transform:translateY(-10px);pointer-events:none;transition:.2s}
.menu-items.open{opacity:1;transform:none;pointer-events:auto}
#main{width:min(calc(100% - 32px),760px);margin:36px auto 64px}
.intro{margin-bottom:30px}
.kicker{color:var(--gold);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.intro h1{font:700 clamp(26px,5vw,35px)/1.15 var(--display);margin:9px 0}
.intro>p:last-child{color:var(--muted)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(18px,4vw,38px);box-shadow:0 24px 80px rgba(0,0,0,.23);backdrop-filter:blur(18px)}
.head,.result-label{display:flex;justify-content:space-between;align-items:end;gap:14px}
.head h2{font-size:20px}
.head>span{font-size:12px;background:var(--surface2);color:var(--muted);padding:7px 11px;border-radius:99px}
.select{display:block;position:relative;margin-top:15px}
.select select{appearance:none;width:100%;min-height:52px;padding:12px 45px 12px 16px;border:1px solid var(--line);border-radius:11px;background:var(--field);font-weight:700}
.select>span{position:absolute;right:16px;top:10px;font-size:22px}
.details{border-top:1px solid var(--line);padding-top:28px;margin-top:28px}
.head small{color:var(--muted)}
.tablewrap{overflow-x:auto;margin-top:15px;border:1px solid var(--line);border-radius:13px;background:var(--field)}
table{border-collapse:collapse;width:100%}
th{background:var(--surface2);font-size:12px;color:var(--muted);text-align:left;padding:11px 9px;white-space:nowrap}
td{padding:7px 9px;border-top:1px solid var(--line)}
input{width:100%;min-width:0;height:42px;border:1px solid transparent;border-radius:7px;background:transparent;padding:7px;font-variant-numeric:tabular-nums}
input:focus{outline:2px solid var(--gold);background:var(--surface)}
.money{position:relative}
.money span{position:absolute;left:7px;top:8px;color:var(--muted)}
.money input{padding-left:20px}
.count{text-align:center}
.rowbuttons{display:flex;gap:10px;margin-top:14px}
.btn{border:1px solid transparent;border-radius:10px;min-height:48px;padding:11px 18px;font-weight:700;cursor:pointer}

/* Smooth feedback for all four buttons */
.btn {
  --btn-glow: rgba(255, 196, 73, 0.28);

  transform: scale(1);
  transform-origin: center;
  transition:
    transform 100ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 160ms ease,
    filter 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease;

  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  will-change: transform;
}

/* Optional: different glow colors for different button styles */
.btn.light {
  --btn-glow: rgba(255, 196, 73, 0.26);
}

.btn.ghost {
  --btn-glow: rgba(120, 120, 120, 0.20);
}

.btn.primary {
  --btn-glow: rgba(255, 183, 47, 0.34);
}

.btn.close {
  --btn-glow: rgba(255, 183, 47, 0.28);
}

/* Apply hover only to devices that actually support hovering */
@media (hover: hover) and (pointer: fine) {
  .btn:not(:disabled):hover {
    box-shadow:
      0 0 0 3px var(--btn-glow),
      0 6px 18px var(--btn-glow);
    filter: brightness(1.035);
  }
}

/* Mouse click and mobile tap feedback */
.btn:not(:disabled):active {
  transform: scale(0.985);
  box-shadow:
    0 0 0 2px var(--btn-glow),
    0 3px 9px var(--btn-glow);
  filter: brightness(0.98);
  transition-duration: 70ms;
}

/* Accessible keyboard feedback */
.btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
  box-shadow:
    0 0 0 3px var(--btn-glow),
    0 6px 18px var(--btn-glow);
}

/* Disabled buttons should not react */
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

/* Respect the device's reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  .btn {
    transition:
      box-shadow 100ms ease,
      filter 100ms ease,
      background-color 100ms ease;
  }

  .btn:not(:disabled):active {
    transform: none;
  }
}
.light{background:var(--surface2);border-color:var(--line)}
.ghost{background:transparent;color:var(--muted)}
.btn:disabled{opacity:.4}
.primary{display:flex;width:100%;justify-content:center;gap:10px;margin-top:22px;min-height:55px;background:var(--primary);color:var(--primaryText)}
#error{min-height:24px;color:var(--danger);font-size:14px;margin-top:8px}
.summary{margin-top:20px;padding:18px;background:var(--surface2);border-radius:13px;display:grid;grid-template-columns:.7fr 1.3fr;gap:16px;align-items:center}
.summary dl{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.summary dt{font-size:12px;color:var(--muted)}
.summary dd{font:700 21px var(--display);font-variant-numeric:tabular-nums}
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:16px;visibility:hidden}
.modal.open{visibility:visible}
.backdrop{position:absolute;inset:0;background:rgba(4,7,9,.7);backdrop-filter:blur(10px);opacity:0;transition:.25s}
.modal.open 
.backdrop{opacity:1}
.sheet{position:relative;width:min(100%,720px);max-height:90dvh;overflow:auto;background:#fff;color:#29241b;border-radius:20px;padding:clamp(20px,4vw,38px);box-shadow:0 30px 100px rgba(0,0,0,.4);opacity:0;transform:translateY(20px);transition:.28s}
.modal.open .sheet{opacity:1;transform:none}
.x{position:absolute;right:15px;top:15px;border:0;border-radius:50%;width:44px;height:44px;background:#f1eee8;font-size:24px;z-index:2}
.calc-loader{height:330px;display:grid;place-content:center;text-align:center}
.calc-loader p{color:#8a8377}
.result-head{padding-right:45px}
.result-head h2{font:700 clamp(28px,5vw,36px) var(--display);margin:4px 0}
.result-head>p:last-child{color:#6f685d}
.averages{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:25px}
.avg{background:#f4f0e8;border-radius:14px;padding:16px}
.avg span{display:block;color:#6f685d;font-size:13px}
.avg strong{display:block;font:700 28px var(--display);margin-top:3px}
.result-section{margin-top:28px}
.result-label{margin-bottom:11px}
.result-label small{color:#776f63}
.result-table{overflow-x:auto;border:1px solid rgba(40,35,25,.14);border-radius:13px}
.result-table th{background:#f4f0e8;color:#665f54}
.result-table td{border-color:rgba(40,35,25,.1);font-variant-numeric:tabular-nums}
.result-table th:not(:first-child),
.result-table td:not(:first-child){text-align:right}
.pos{color:#b32638;font-weight:700}
.neg{color:#167448;font-weight:700}
.settlements{margin-top:27px;padding:18px;background:#27302c;color:white;border-radius:14px}
.settlements .result-label small{color:#c5cbc6}
.settlements ol{list-style:none}
.transfer{display:grid;grid-template-columns:1fr auto;padding:13px 0;border-top:1px solid rgba(255,255,255,.13);font-weight:700}
.transfer b{color:#f0c453}.close{width:100%;margin-top:20px;background:#e3b23d;color:#211a0a}
.settled{padding-top:10px;color:#ced4cf}
.startup{position:fixed;inset:0;z-index:300;background:#171c22;color:white;display:grid;place-content:center;justify-items:center;gap:12px;transition:.35s}
.startup.done{opacity:0;visibility:hidden}
.coinbox{position:relative;width:86px;height:102px}
.coinbox.small{transform:scale(.8);margin:auto}
.coin{position:absolute;left:13px;top:3px;width:60px;height:60px;border:4px solid #875a0d;border-radius:50%;background:radial-gradient(circle at 32% 25%,#fff2a0,#e5ba43 30%,#9b6914 100%);box-shadow:inset 0 0 0 5px #f3d36a,5px 9px 13px #0004;display:grid;place-items:center;font:800 30px var(--display);color:#70490a;animation:bounce .85s cubic-bezier(.16,1,.3,1) infinite}
.coinbox i{position:absolute;bottom:7px;left:23px;width:40px;height:9px;background:#0005;border-radius:50%;filter:blur(2px);animation:shadow .85s infinite}@keyframes bounce{0%,100%{transform:translateY(20px) scaleY(.9)}45%{transform:translateY(-3px) rotateY(180deg)}}
@keyframes shadow{0%,100%{transform:scaleX(1)}45%{transform:scaleX(.55);opacity:.3}}
@media(max-width:620px){.top,#main{width:calc(100% - 20px)}.top{height:68px}.brand small{display:none}#main{margin-top:20px}.card{padding:16px}.details{margin-top:22px;padding-top:22px}.head>small{display:none}.rowbuttons{display:grid;grid-template-columns:1fr 1fr}.summary{grid-template-columns:1fr}.sheet{max-height:94dvh;padding:20px 16px}.result-table th,.result-table td{padding-inline:7px;font-size:14px}.result-table th{font-size:12px}.averages{grid-template-columns:1fr 1fr}.avg strong{font-size:25px}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}#particles{display:none}}