:root{
  --ink:#0d1f33; --muted:#5b7288; --line:#dbe6f2; --paper:#eef3f9; --card:#fff;
  --blue:#186084; --blue-dark:#0d3a54; --navy:#0d1f33; --ok:#0a7f4f; --danger:#b42318;
  --amber:#c8891b;
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);
  font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif}
input,select,button{font:inherit}
.center{min-height:60vh;display:flex;align-items:center;justify-content:center}
.muted{color:var(--muted)}
.err{color:var(--danger);font-size:.85rem;margin:8px 0 0}
.hint{color:var(--muted);font-size:.78rem;margin:2px 0 10px}

/* auth */
.auth-wrap{max-width:420px;margin:0 auto;padding:34px 18px;text-align:center}
.brand{height:56px;margin:10px auto 22px;display:block}
.auth-card{text-align:left}
.auth-card h2{margin:0 0 6px}
.auth-card label{display:block;font-size:.74rem;font-weight:700;color:var(--muted);margin:12px 0 4px}
.auth-card input{width:100%}

/* app shell */
.app{max-width:640px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--navy);color:#fff}
.topbar-logo{height:26px}
.topbar-who{margin-left:auto;text-align:right;line-height:1.1}
.topbar-who .role{display:block;font-size:.66rem;color:#9db8d0;text-transform:uppercase;letter-spacing:.05em}
.link{background:none;border:none;color:#bcd6ea;cursor:pointer;font-size:.8rem;padding:6px}
.main{flex:1;padding:16px}
.foot{padding:14px 16px;text-align:center;font-size:.72rem}

/* cards + inputs */
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 16px;margin-bottom:14px}
.card h2{margin:0 0 4px;font-size:1.15rem;color:var(--navy)}
input,select{padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);outline:none}
input:focus,select:focus{border-color:var(--blue)}
button.pri{margin-top:14px;width:100%;padding:12px;border:none;border-radius:11px;
  background:var(--blue);color:#fff;font-weight:700;cursor:pointer}
button.pri:disabled{opacity:.6}

/* tabs */
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.tab{padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;
  color:var(--muted);font-weight:700;cursor:pointer}
.tab.on{border-color:var(--blue);background:#eef6ff;color:var(--blue-dark)}
.status{background:#eaf7f0;color:var(--ok);font-weight:700;font-size:.8rem;
  padding:7px 11px;border-radius:9px;margin:4px 0 10px}

/* rate rows */
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:10px 0;border-bottom:1px solid var(--line)}
.row-main{flex:1 1 100%;line-height:1.25}
.row-main .zh{display:block;color:var(--muted);font-size:.78rem}
.row-main .spec{display:block;color:var(--amber);font-size:.72rem}
.row .rm{color:var(--muted);font-size:.8rem}
.row .num{width:78px;text-align:right}
.row select{max-width:170px;flex:1 1 auto}

/* item supply toggle */
.seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
.seg button{border:none;background:#fff;padding:6px 11px;font-size:.76rem;color:var(--muted);cursor:pointer}
.seg button.on{background:var(--blue);color:#fff;font-weight:700}
.chk{display:inline-flex;align-items:center;gap:4px;font-size:.74rem;color:var(--muted)}

/* charges grid */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:6px}
.f label{display:block;font-size:.74rem;font-weight:700;color:var(--muted);margin-bottom:4px}
.f input{width:100%}
@media(max-width:460px){ .grid2{grid-template-columns:1fr} .row select{max-width:140px} }