*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#f4f6fb; --card:#fff; --fg:#1f2937; --muted:#6b7280;
  --primary:#667eea; --primary-2:#764ba2;
  --border:#e5e7eb; --danger:#ef4444; --ok:#10b981;
  --shadow:0 6px 20px rgba(30,41,59,.08);
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f172a;--card:#1e293b;--fg:#e2e8f0;--muted:#94a3b8;--border:#334155;--shadow:0 6px 20px rgba(0,0,0,.4)}
}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  min-height:100vh;padding-bottom:calc(72px + env(safe-area-inset-bottom));}
a{color:var(--primary);text-decoration:none}
button{font:inherit;cursor:pointer}

.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;
  box-shadow:var(--shadow)}
.topbar .brand{font-weight:700;font-size:17px}
.topbar .stat{font-size:12px;color:#a7f3d0}
.topbar .stat.off{color:#fca5a5}

#app{max-width:960px;margin:0 auto;padding:14px}
.view{display:grid;gap:14px}
.card{background:var(--card);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.card-title{font-weight:700;font-size:16px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}
.card-title .right{display:flex;gap:8px;align-items:center}

.balance-card{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;text-align:center}
.balance-card .label{opacity:.85;font-size:13px}
.balance-card .balance{font-size:38px;font-weight:800;margin:6px 0;letter-spacing:.5px}
.balance-card .sub{display:flex;justify-content:center;gap:20px;opacity:.9;font-size:13px}
.balance-card .sub b{font-weight:700}
.balance-card .actions{margin-top:14px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

.btn{background:var(--card);color:var(--fg);border:1px solid var(--border);padding:9px 16px;border-radius:10px;font-weight:600;transition:.15s}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:#fff;color:var(--primary);border:none}
.balance-card .btn{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.3)}
.balance-card .btn.primary{background:#fff;color:var(--primary)}
.btn.tiny{padding:5px 10px;font-size:13px}
.btn.ghost{background:transparent}
.btn.danger{color:var(--danger);border-color:var(--danger)}

.form{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form label{display:flex;flex-direction:column;font-size:12px;color:var(--muted);gap:4px}
.form label.full{grid-column:1/-1}
.form input,.form select,.form textarea{
  border:1px solid var(--border);background:var(--card);color:var(--fg);
  padding:10px 12px;border-radius:8px;font-size:14px;outline:none}
.form input:focus,.form select:focus{border-color:var(--primary)}
.form button[type=submit]{grid-column:1/-1;margin-top:4px}

.uploads{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.uploader{border:1.5px dashed var(--border);border-radius:10px;padding:12px;text-align:center;position:relative;cursor:pointer;font-size:12px;color:var(--muted)}
.uploader span{display:block;margin-bottom:8px;font-weight:600;color:var(--fg)}
.uploader input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.uploader.done{border-color:var(--ok);color:var(--ok);border-style:solid}
.uploader .prev{font-size:11px;word-break:break-all;margin-top:4px}

.list{display:flex;flex-direction:column;gap:8px}
.row{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;
  background:var(--bg);border-radius:8px;font-size:14px;gap:10px}
.row .l{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1}
.row .l .t{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .l .s{font-size:12px;color:var(--muted)}
.row .amt{font-weight:700;white-space:nowrap}
.row .amt.plus{color:var(--ok)}
.row .amt.minus{color:var(--danger)}
.row .del{background:transparent;border:0;color:var(--muted);font-size:16px;padding:4px 8px}

.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;align-items:center;font-size:13px}
.filters input{border:1px solid var(--border);background:var(--card);color:var(--fg);padding:6px 10px;border-radius:6px}
.mini{border:1px solid var(--border);background:var(--card);color:var(--fg);padding:6px 10px;border-radius:6px;font-size:13px;width:130px}

.table-wrap{overflow-x:auto}
table.ledger{width:100%;border-collapse:collapse;font-size:13px;min-width:640px}
.ledger th,.ledger td{padding:9px 8px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.ledger th{color:var(--muted);font-weight:600;background:var(--bg)}
.ledger td.num,.ledger th.num{text-align:right;font-variant-numeric:tabular-nums}
.ledger tr:hover td{background:rgba(102,126,234,.06)}
.ledger .files a{display:inline-block;margin-right:6px}

.tabbar{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--card);
  border-top:1px solid var(--border);z-index:10;padding-bottom:env(safe-area-inset-bottom)}
.tab{flex:1;background:transparent;border:0;color:var(--muted);padding:10px 4px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px}
.tab i{font-size:20px;font-style:normal}
.tab.active{color:var(--primary)}

.toast{position:fixed;left:50%;bottom:88px;transform:translateX(-50%);
  background:rgba(30,41,59,.92);color:#fff;padding:10px 18px;border-radius:8px;font-size:14px;z-index:100;box-shadow:var(--shadow)}

@media (min-width:768px){
  #app{padding:24px}
  .view{grid-template-columns:1fr 1fr}
  .view[data-view=home] .balance-card,
  .view[data-view=ledger] .card{grid-column:1/-1}
  .form{grid-template-columns:repeat(3,1fr)}
  .balance-card .balance{font-size:48px}
}