:root{
  --bg:#f6f4ef; --card:#fffdf9; --ink:#1d2321; --muted:#6b726f; --line:#e4e0d6;
  --brand:#1f6f5c; --brand-ink:#fff; --brand-soft:#e2efe9;
  --warn:#b26a00; --warn-soft:#fdf0d9; --bad:#b3261e; --bad-soft:#fbe4e2; --ok:#2e7d4f;
  --radius:14px; --shadow:0 1px 2px rgba(0,0,0,.05),0 4px 14px rgba(0,0,0,.04);
  --tabh:64px;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#121514; --card:#1b1f1e; --ink:#eef1ef; --muted:#9aa29e; --line:#2c3230;
    --brand:#4fb393; --brand-ink:#08221a; --brand-soft:#1d332c; --warn:#f0b04c; --warn-soft:#3a2c12;
    --bad:#f08a80; --bad-soft:#3b1d1a; --ok:#6fcf97; --shadow:none; }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink)}
body{font:16px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans TC","PingFang HK",sans-serif;
  padding-bottom:calc(var(--tabh) + env(safe-area-inset-bottom) + 12px); -webkit-tap-highlight-color:transparent}
#app{max-width:720px;margin:0 auto;padding:calc(12px + env(safe-area-inset-top)) 16px 0}
h1{font-size:1.45rem;margin:6px 0 12px;letter-spacing:-.01em}
h2{font-size:1.05rem;margin:22px 0 8px}
h3{font-size:.95rem;margin:14px 0 6px}
a{color:var(--brand)}
.muted{color:var(--muted)} .small{font-size:.85rem} .tiny{font-size:.75rem}
.row{display:flex;gap:8px;align-items:center} .wrap{flex-wrap:wrap} .grow{flex:1;min-width:0}
.between{justify-content:space-between} .stack>*+*{margin-top:10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.list>.card+.card{margin-top:8px}
hr{border:0;border-top:1px solid var(--line);margin:16px 0}

/* forms */
label.f{display:block;font-size:.8rem;color:var(--muted);margin:10px 0 4px}
input,select,textarea{width:100%;font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;min-height:44px}
textarea{min-height:70px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px;border-color:transparent}
input[type=checkbox]{width:22px;height:22px;min-height:0;accent-color:var(--brand)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 10px}
button,.btn{font:inherit;font-weight:600;border:1px solid var(--line);background:var(--card);color:var(--ink);
  border-radius:10px;padding:10px 14px;min-height:44px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none}
button.primary,.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
button.danger{color:var(--bad);border-color:var(--bad-soft)}
button.ghost{background:transparent;border-color:transparent;color:var(--brand)}
button.block,.btn.block{width:100%}
button:disabled{opacity:.5;cursor:not-allowed}
button.sm{min-height:34px;padding:6px 10px;font-size:.85rem}

/* chips & badges */
.chips{display:flex;gap:6px;overflow-x:auto;padding:2px 0 6px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:6px 12px;font-size:.85rem;min-height:34px;font-weight:500}
.chip.on{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}
.badge{display:inline-block;font-size:.72rem;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--brand-soft);color:var(--brand);white-space:nowrap}
.badge.warn{background:var(--warn-soft);color:var(--warn)} .badge.bad{background:var(--bad-soft);color:var(--bad)}
.badge.grey{background:var(--line);color:var(--muted)}

/* top usage bar */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px}
.usage{font-size:.78rem;color:var(--muted);text-align:right}
.meter{height:5px;background:var(--line);border-radius:3px;overflow:hidden;width:90px;margin-top:3px;margin-left:auto}
.meter>i{display:block;height:100%;background:var(--brand)}
.meter.full>i{background:var(--bad)}

/* stock list */
.filters{position:sticky;top:0;z-index:5;background:var(--bg);padding:6px 0 4px;margin:0 -16px;padding-left:16px;padding-right:16px}
.filters select{min-height:36px;padding:6px 10px;font-size:.85rem;width:auto;flex:none;border-radius:999px}
.item{display:flex;gap:12px;align-items:center;padding:10px 12px}
.thumb{width:52px;height:52px;border-radius:10px;object-fit:cover;background:var(--line);flex:none}
.thumb.empty{display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:var(--muted)}
.item .title{font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .sub{font-size:.85rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .meta{display:flex;gap:4px;flex-wrap:wrap;margin-top:4px}
.qty{display:flex;align-items:center;gap:2px;flex:none}
.qty button{width:40px;height:40px;min-height:0;padding:0;border-radius:50%;font-size:1.3rem;line-height:1}
.qty .n{min-width:34px;text-align:center;font-weight:700;font-size:1.1rem;font-variant-numeric:tabular-nums}
.qty .n.zero{color:var(--bad)}
.empty-state{text-align:center;color:var(--muted);padding:40px 10px}

/* scan */
.shot{width:100%;max-height:300px;object-fit:contain;border-radius:var(--radius);background:#000;display:block}
.bigbtn{width:100%;min-height:120px;flex-direction:column;font-size:1.05rem;border-style:dashed;border-width:2px;background:var(--brand-soft);color:var(--brand);border-color:var(--brand)}
.bigbtn svg{width:40px;height:40px;stroke:currentColor;fill:none;stroke-width:1.7}
.review .card{padding:12px}
.review .card.off{opacity:.5}
.conf-low{border-left:4px solid var(--bad)} .conf-medium{border-left:4px solid var(--warn)}
.spinner{width:42px;height:42px;border:4px solid var(--brand-soft);border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite;margin:30px auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* tables (admin) */
.tbl{width:100%;border-collapse:collapse;font-size:.88rem}
.tbl th,.tbl td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-size:.75rem;color:var(--muted);font-weight:600}
.scrollx{overflow-x:auto}
.segment{display:flex;background:var(--line);border-radius:12px;padding:3px;gap:3px;margin-bottom:12px;overflow-x:auto}
.segment button{flex:1;min-height:36px;border:0;background:transparent;font-size:.85rem;padding:6px 8px;white-space:nowrap}
.segment button.on{background:var(--card);box-shadow:var(--shadow)}
.notice{background:var(--warn-soft);color:var(--warn);border-radius:12px;padding:10px 12px;font-size:.9rem}
.notice.bad{background:var(--bad-soft);color:var(--bad)}
.notice.good{background:var(--brand-soft);color:var(--brand)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}

/* bottom tabs */
#tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:center;background:var(--card);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);height:calc(var(--tabh) + env(safe-area-inset-bottom))}
#tabs a{flex:1;max-width:140px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--muted);text-decoration:none;font-size:.72rem;font-weight:600}
#tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
#tabs a.on{color:var(--brand)}
#tabs a.tab-scan svg{background:var(--brand);color:var(--brand-ink);stroke:var(--brand-ink);border-radius:12px;padding:4px;width:34px;height:34px}

/* sheet / dialog */
.sheet-bg{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:30;display:flex;align-items:flex-end;justify-content:center}
.sheet{background:var(--card);width:100%;max-width:720px;border-radius:18px 18px 0 0;padding:18px 16px calc(18px + env(safe-area-inset-bottom));max-height:88vh;overflow:auto}
.sheet h3{margin-top:0}
#toast{position:fixed;left:50%;bottom:calc(var(--tabh) + env(safe-area-inset-bottom) + 14px);transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:.9rem;opacity:0;pointer-events:none;transition:.2s;z-index:40;max-width:90vw}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* login */
.login{max-width:380px;margin:12vh auto 0}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.5rem;margin-bottom:18px}
.logo img{width:44px;height:44px}

/* sticky confirm bar on the review screen */
.actionbar{position:sticky;bottom:calc(var(--tabh) + env(safe-area-inset-bottom));z-index:6;background:var(--bg);
  margin:16px -16px 0;padding:10px 16px;border-top:1px solid var(--line)}
.actionbar button{flex:1}

/* review: compact rows */
.grid3{display:grid;grid-template-columns:1.1fr 1fr .8fr;gap:0 8px}
.rcard{padding:10px 12px}
.rhead{display:flex;align-items:center;gap:10px}
.rtext{cursor:pointer;min-width:0}
.rtext .title{font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rtext .sub{font-size:.82rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rtext .meta{margin-top:3px}
.rcard .qty button{width:34px;height:34px;font-size:1.15rem}
.rcard .qty .n{min-width:26px;font-size:1rem}
.redit{border-top:1px dashed var(--line);margin-top:10px}
.ignored summary{cursor:pointer;list-style:none;padding:2px 0}
.ignored summary::-webkit-details-marker{display:none}
.ignored summary::before{content:'▸ ';color:var(--muted)}
.ignored[open] summary::before{content:'▾ '}
.catrow.off{opacity:.6}