:root{
  --bg:#f5f7fb; --card:#ffffff; --ink:#141b2d; --dim:#6b7788; --line:#e6eaf1;
  --pri:#2563eb; --pri-d:#1d4ed8; --ok:#0ea472; --warn:#e6a100; --bad:#e5484d;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 4px 16px rgba(16,24,40,.06);
  --tab-h:60px; --top-h:52px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow-x:hidden}
body.sheet-open{overflow:hidden}
body{background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
#app{min-height:100%;display:flex;flex-direction:column}
a{color:var(--pri);text-decoration:none}

/* top bar */
#topbar{position:sticky;top:0;z-index:20;height:var(--top-h);display:flex;align-items:center;
  justify-content:space-between;padding:0 16px;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.tb-title{font-weight:700;font-size:16px;letter-spacing:.02em}
.tb-title small{font-weight:500;color:var(--dim);margin-left:6px;font-size:12px}
#tb-right{display:flex;gap:8px;align-items:center}
.tb-btn{font-size:13px;color:var(--dim);padding:6px 10px;border-radius:8px;cursor:pointer}
.tb-btn:active{background:var(--line)}

/* main */
#view{flex:1;padding:14px 14px calc(var(--tab-h) + 20px);max-width:720px;margin:0 auto;width:100%}
.pagehead{margin:2px 2px 12px}
.pagehead h1{font-size:20px;margin:0 0 2px}
.pagehead .sub{color:var(--dim);font-size:13px}
.loading,.empty{color:var(--dim);text-align:center;padding:40px 0;font-size:14px}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;
  box-shadow:var(--shadow);margin-bottom:14px}
.card h2{font-size:15px;margin:0 0 12px}
.muted{color:var(--dim);font-size:13px}

/* KPI grid */
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 12px;box-shadow:var(--shadow)}
.kpi .n{font-size:24px;font-weight:750;letter-spacing:-.02em}
.kpi .l{color:var(--dim);font-size:12px;margin-top:2px}
.kpi.accent .n{color:var(--pri)}

/* bars / chart */
.chart{display:flex;align-items:flex-end;gap:5px;height:120px;padding-top:8px}
.chart .bar{flex:1;background:linear-gradient(180deg,#5b8def,#2563eb);border-radius:4px 4px 0 0;min-height:2px;position:relative}
.chart .bar span{position:absolute;bottom:-18px;left:0;right:0;text-align:center;font-size:9px;color:var(--dim)}
.rank{display:flex;flex-direction:column;gap:8px}
.rank .row{display:flex;align-items:center;gap:10px}
.rank .nm{width:84px;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank .track{flex:1;height:8px;background:var(--line);border-radius:5px;overflow:hidden}
.rank .fill{height:100%;background:var(--pri);border-radius:5px}
.rank .v{width:52px;text-align:right;font-size:12px;color:var(--dim)}

/* list rows */
.row{display:flex;align-items:center;gap:10px}
.list{display:flex;flex-direction:column}
.item{display:flex;align-items:center;gap:12px;padding:12px 4px;border-bottom:1px solid var(--line)}
.item:last-child{border-bottom:none}
.item .grow{flex:1;min-width:0}
.item .t1{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .t2{color:var(--dim);font-size:12px;margin-top:1px}
.item .r{text-align:right;font-size:13px;white-space:nowrap}

/* pills / tags */
.pill{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:#eef2f8;color:#465468;font-weight:600}
.pill.pri{background:#e7efff;color:var(--pri)}
.pill.ok{background:#e3f6ee;color:var(--ok)}
.pill.warn{background:#fdf3d8;color:#8a6400}
.pill.gray{background:#eef1f5;color:#69737f}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}

/* buttons */
button,.btn{font:inherit;border:none;border-radius:10px;padding:11px 16px;font-weight:600;cursor:pointer;
  background:var(--line);color:var(--ink)}
button:active,.btn:active{transform:translateY(1px)}
.btn.pri,button.pri{background:var(--pri);color:#fff}
.btn.pri:active{background:var(--pri-d)}
.btn.sm{padding:7px 12px;font-size:13px;border-radius:9px}
.btn.gho{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn.danger{background:#fdecec;color:var(--bad)}
.btn.block{width:100%;padding:14px;font-size:16px}
.btnrow{display:flex;gap:10px;flex-wrap:wrap}

/* forms */
label.f{display:block;margin-bottom:12px}
label.f .lb{font-size:13px;color:var(--dim);margin-bottom:5px;display:block}
input,select,textarea{width:100%;font:inherit;padding:11px 12px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px #2563eb22}
textarea{min-height:64px;resize:vertical}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* scanner */
#scanWrap{position:relative;border-radius:16px;overflow:hidden;background:#000;aspect-ratio:1/1;max-width:420px;margin:0 auto}
#scanVid{width:100%;height:100%;object-fit:cover;display:block}
.scan-frame{position:absolute;inset:14%;border:2px solid rgba(255,255,255,.9);border-radius:16px;box-shadow:0 0 0 100vmax rgba(0,0,0,.35)}
.scan-hint{position:absolute;left:0;right:0;bottom:14px;text-align:center;color:#fff;font-size:13px;text-shadow:0 1px 4px #000}

/* tab bar */
#tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;height:calc(var(--tab-h) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);display:flex;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-top:1px solid var(--line)}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--dim);font-size:11px;cursor:pointer;padding-top:8px}
.tab svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8}
.tab.on{color:var(--pri)}
.tab.scan-cta{position:relative}
.tab.scan-cta .fab{width:48px;height:48px;border-radius:16px;background:var(--pri);color:#fff;display:flex;
  align-items:center;justify-content:center;margin-top:-14px;box-shadow:0 6px 16px #2563eb55}
.tab.scan-cta .fab svg{width:26px;height:26px;stroke:#fff}

/* toast + modal */
#toast{position:fixed;left:50%;bottom:calc(var(--tab-h) + 24px);transform:translateX(-50%);z-index:60;
  background:#1c2534;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;opacity:0;
  transition:opacity .2s,transform .2s;pointer-events:none;max-width:88%}
#toast.show{opacity:1;transform:translateX(-50%) translateY(-4px)}
.sheet-bg{position:fixed;inset:0;z-index:50;background:rgba(10,15,25,.4);display:flex;align-items:flex-end;justify-content:center}
.sheet{position:relative;background:#fff;width:100%;max-width:720px;border-radius:18px 18px 0 0;padding:18px 16px calc(20px + env(safe-area-inset-bottom));
  max-height:88vh;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;animation:up .22s ease}
@keyframes up{from{transform:translateY(30px);opacity:.6}to{transform:none;opacity:1}}
.sheet h2{margin:2px 0 14px;font-size:17px;padding-right:40px}
.sheet .close{position:absolute;top:12px;right:12px;width:34px;height:34px;padding:0;border:none;border-radius:50%;
  background:var(--line);color:var(--dim);font-size:15px;line-height:1;display:flex;align-items:center;justify-content:center;z-index:3;cursor:pointer}
.divider{height:1px;background:var(--line);margin:14px 0}

/* auth screen */
.authwrap{min-height:calc(100vh - var(--top-h) - 40px);display:flex;align-items:center;justify-content:center;padding:16px}
.authcard{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--shadow);padding:26px 22px}
.authlogo{font-size:24px;font-weight:800;letter-spacing:-.01em;text-align:center}
.authsub{color:var(--dim);text-align:center;font-size:13px;margin-top:2px;margin-bottom:20px}
.authtabs{display:flex;background:#eef1f6;border-radius:12px;padding:4px;margin-bottom:18px}
.atab{flex:1;text-align:center;padding:9px;border-radius:9px;color:var(--dim);font-weight:600;cursor:pointer;font-size:14px}
.atab.on{background:#fff;color:var(--pri);box-shadow:0 1px 3px rgba(16,24,40,.1)}
.authfoot{text-align:center;margin-top:16px;font-size:13px}
.authfoot a{cursor:pointer}
.profile{display:flex;flex-direction:column;gap:2px}
.profile .p{display:flex;justify-content:space-between;padding:11px 2px;border-bottom:1px solid var(--line);font-size:14px}
.profile .p:last-child{border:none}
.profile .p .k{color:var(--dim)}

/* 设备注册（管理员扫条码） */
.regslots{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}
.slot{border:1.5px dashed var(--line);border-radius:14px;padding:14px 6px;text-align:center;background:#fafbfe}
.slot.filled{border-style:solid;border-color:var(--ok);background:#f2fbf7}
.slot .pos{font-size:20px;font-weight:800}
.slot .sn{font-size:10px;color:var(--dim);margin-top:4px;word-break:break-all;min-height:13px}
.slot.filled .sn{color:var(--ok);font-weight:600}
.posbtns{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.posbtn{padding:28px 6px;border-radius:18px;background:var(--pri);color:#fff;font-size:30px;font-weight:800;
  border:none;box-shadow:0 8px 18px #2563eb44;cursor:pointer;line-height:1}
.posbtn small{display:block;font-size:12px;font-weight:600;opacity:.85;margin-top:6px}
.posbtn:active{transform:translateY(2px)}
.posbtn.taken{background:#eef1f6;color:#9aa5b3;box-shadow:none}
.snbig{font-family:ui-monospace,monospace;font-size:22px;font-weight:700;text-align:center;letter-spacing:.03em;
  background:#f2fbf7;color:var(--ok);border:1px solid #bfe9d4;border-radius:12px;padding:16px;margin:6px 0}
.bigbtn{width:100%;padding:20px;font-size:18px;border-radius:16px;background:var(--pri);color:#fff;font-weight:700;box-shadow:0 6px 16px #2563eb44}

.pill.new{background:#e5484d;color:#fff}