:root{
  --bg:#f6f5f1; --panel:#fff; --fg:#1f2320; --muted:#6b716c; --line:#dcdad2;
  --accent:#1f5f4a; --accent-fg:#fff; --accent-soft:#e3efe8;
  --good:#1f7a4d; --good-soft:#e2f3e8; --warn:#9a6300; --warn-soft:#fbf0d6; --bad:#b4332a; --bad-soft:#f9e3e0;
  --agent:#2f4f7a; --agent-soft:#e4ecf6;
  --font-body:"Noto Sans TC",system-ui,-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#171a18; --panel:#202421; --fg:#e8e9e4; --muted:#9aa09b; --line:#353a36;
  --accent:#6fc19b; --accent-fg:#102118; --accent-soft:#1d2f27;
  --good:#6fc19b; --good-soft:#1d2f27; --warn:#e4b654; --warn-soft:#33290f; --bad:#ef8b82; --bad-soft:#3a1f1c;
  --agent:#8fb3e6; --agent-soft:#1c2636; color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font-family:var(--font-body);font-size:15px;line-height:1.55;
  padding-block:16px 48px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
[hidden]{display:none!important}
.wrap{max-width:1180px;margin:0 auto}
header{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;border-bottom:2px solid var(--fg);padding-bottom:10px;margin-bottom:16px}
header h1{font-size:22px;margin:0;font-weight:700;letter-spacing:.02em}
header .sub{color:var(--muted);font-size:13px}
.tabs{display:flex;flex-wrap:wrap;gap:4px;margin-left:auto}
.tabs button{font:inherit;font-size:14px;padding:6px 12px;border:1px solid transparent;background:none;color:var(--muted);border-radius:6px;cursor:pointer}
.tabs button[aria-selected="true"]{color:var(--fg);background:var(--panel);border-color:var(--line);font-weight:700}
.tabs button:focus-visible,.btn:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
h2{font-size:16px;margin:0}
h3{font-size:14px;margin:0 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.num{text-align:right;font-variant-numeric:tabular-nums}
.plat{font-weight:700}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px}
.view{display:flex;flex-direction:column;gap:14px}
.stack{display:flex;flex-direction:column;gap:14px}
.stack-sm{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.row.head{margin-bottom:10px}
.spacer{flex:1}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.form-grid label{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--muted);min-width:0}
.span2{grid-column:span 2}.span-all{grid-column:1/-1}
@media (max-width:480px){.span2{grid-column:span 1}}
input,select{font:inherit;font-size:14px;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:6px 8px;min-width:0;width:100%}
input[readonly]{color:var(--muted)}
.btn{font:inherit;font-size:14px;font-weight:500;padding:7px 14px;border-radius:6px;border:1px solid var(--line);background:var(--panel);color:var(--fg);cursor:pointer;white-space:nowrap}
.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
.btn.danger{color:var(--bad);border-color:var(--bad)}
.btn.small{font-size:12px;padding:3px 10px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:14px}
.tbl table{min-width:640px}           /* 窄螢幕改成整張表橫向捲動，不壓扁欄位 */
#catTable{min-width:0}
.num.mono{font-family:inherit}        /* 金額用本文字型 + 等寬數字；等寬字只留給單號 */
td .plat{font-weight:500}
th{font-size:12px;color:var(--muted);font-weight:500;text-align:left;padding:6px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
th.num{text-align:right}
td{padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
td .row{gap:4px;flex-wrap:nowrap}
.pill{display:inline-block;font-size:12px;padding:1px 8px;border-radius:999px;font-weight:500;white-space:nowrap}
.pill.good{background:var(--good-soft);color:var(--good)}
.pill.warn{background:var(--warn-soft);color:var(--warn)}
.pill.bad{background:var(--bad-soft);color:var(--bad)}
.pill.agent{background:var(--agent-soft);color:var(--agent)}
.pill.neutral{background:var(--bg);color:var(--muted);border:1px solid var(--line)}
.notice{border-left:3px solid var(--warn);background:var(--warn-soft);padding:8px 12px;border-radius:0 6px 6px 0;font-size:13.5px}
.notice.agent{border-color:var(--agent);background:var(--agent-soft)}
.cart .head{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:8px}
.cart .total{margin-left:auto;font-weight:700;font-variant-numeric:tabular-nums}
@media (max-width:700px){.tbl{mask-image:linear-gradient(to right,#000 calc(100% - 28px),transparent);-webkit-mask-image:linear-gradient(to right,#000 calc(100% - 28px),transparent)}}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:14px}
.tile{border:1px solid var(--line);border-radius:6px;padding:10px 12px}
.tile .v{font-family:var(--font-mono);font-size:20px;font-weight:500;font-variant-numeric:tabular-nums}
.tile .l{font-size:12px;color:var(--muted)}
.diff{font-family:var(--font-mono);font-size:12px}.diff.up{color:var(--bad)}.diff.down{color:var(--good)}
.auth{min-height:80vh;display:grid;place-items:center}
.auth-box{width:min(420px,100%)}
.auth-box h1{margin:0;font-size:26px}
.auth-box form{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.auth-box label{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--muted)}
dialog{border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--fg);padding:18px;width:min(640px,calc(100% - 32px));max-height:88vh;overflow:auto;box-sizing:border-box}
#settingsForm{max-width:720px}
output.out{display:block;padding:6px 0;font-size:15px;color:var(--fg);font-variant-numeric:tabular-nums;min-height:33px}
header .who b{font-weight:700;color:var(--fg);margin-right:6px}
dialog::backdrop{background:rgba(0,0,0,.4)}
.line-edit{display:grid;grid-template-columns:1fr auto 120px;gap:8px;align-items:center;font-size:13px}
.line-block{border-bottom:1px dashed var(--line);padding-bottom:6px}
.line-flag{margin-top:6px;padding:8px 10px;background:var(--bad-soft);border-radius:6px;font-size:13px}
.line-flag select{width:auto}
@media (max-width:560px){.line-edit{grid-template-columns:1fr;gap:4px}.line-edit input{max-width:160px}}
.toast{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:8px 16px;border-radius:999px;font-size:13px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:50;max-width:90vw}
.toast.show{opacity:1}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}

/* 本月用量 */
#monthTable input.qty{width:84px;text-align:right;font-family:var(--font-mono)}
#monthTable tfoot td{border-top:1px solid var(--line);border-bottom:0;font-weight:500}