:root{
--color-primary:#1E3A8A;--color-on-primary:#fff;--color-secondary:#3B82F6;
--color-accent:#7C3AED;--color-on-accent:#fff;--color-background:#F8FAFC;
--color-foreground:#16295e;--color-card:#fff;--color-card-foreground:#1E40AF;
--color-muted:#E9EEF5;--color-muted-foreground:#475569;--color-border:#BFDBFE;
--color-destructive:#DC2626;--color-on-destructive:#fff;--color-ring:#1E3A8A;
--radius:14px;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;
--bottomnav-h:60px;
}
@media (prefers-color-scheme:dark){
:root{--color-background:#0b1226;--color-foreground:#dbe4ff;--color-card:#131c38;--color-card-foreground:#dbe4ff;--color-muted:#1e2a4d;--color-muted-foreground:#aab8d8;--color-border:#2b3c6e}
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--color-background);color:var(--color-foreground);line-height:1.5}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-1);padding:10px 12px;background:var(--color-card);border-bottom:1px solid var(--color-border)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;flex-shrink:0}
.brand-mark{width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));display:inline-block}
.nav{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.nav a{padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--color-foreground);min-height:36px;display:inline-flex;align-items:center;font-size:14px}
.nav a.active,.nav a:hover{background:var(--color-muted)}
.nav a.active{font-weight:700}
.userbox{display:flex;align-items:center;gap:8px;flex-basis:100%;order:3;justify-content:flex-end;font-size:13px;color:var(--color-muted-foreground);padding-top:2px}
@media (min-width:900px){.userbox{flex-basis:auto;order:0;padding-top:0}}
.userbox .btn{min-height:36px;padding:6px 12px;font-size:13px}
/* --- Bottom tab bar: mobile only --- */
.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;background:var(--color-card);border-top:1px solid var(--color-border);padding-bottom:env(safe-area-inset-bottom);height:calc(var(--bottomnav-h) + env(safe-area-inset-bottom))}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:44px;text-decoration:none;color:var(--color-muted-foreground);font-size:11px;font-weight:600;padding:4px 0}
.bottomnav a svg{width:22px;height:22px;display:block}
.bottomnav a.active{color:var(--color-foreground)}
.bottomnav a.active svg{stroke-width:2.5}
@media (min-width:900px){.bottomnav{display:none}}
@media (max-width:899px){.nav{display:none}.container{padding-bottom:calc(var(--bottomnav-h) + env(safe-area-inset-bottom) + 24px)}}
.container{max-width:720px;margin:0 auto;padding:var(--space-3) var(--space-2) 64px}
.card{background:var(--color-card);color:var(--color-card-foreground);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px;box-shadow:0 1px 2px rgba(30,58,138,.08)}
.stack{display:grid;gap:16px}
.btn{appearance:none;border:1px solid var(--color-border);border-radius:12px;min-height:48px;padding:12px 18px;font-size:16px;font-weight:600;cursor:pointer;background:var(--color-primary);color:var(--color-on-primary);transition:opacity .2s,transform .15s}
.btn:hover{opacity:.92}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-secondary{background:var(--color-secondary);color:#fff}
.btn-accent{background:var(--color-accent);color:var(--color-on-accent)}
.btn-ghost{background:transparent;color:var(--color-foreground)}
.btn-danger{background:var(--color-destructive);color:var(--color-on-destructive)}
.field{display:grid;gap:6px;margin:8px 0}
.field label{font-weight:600}
.field input,.field select{font-size:17px;padding:12px 14px;min-height:48px;border-radius:12px;border:1px solid var(--color-border);background:var(--color-card);color:inherit;width:100%}
.field input:focus,.btn:focus-visible,.nav a:focus-visible,.bottomnav a:focus-visible{outline:3px solid var(--color-ring);outline-offset:2px}
.muted{color:var(--color-muted-foreground)}
.balance{font-size:40px;font-weight:800;letter-spacing:-.02em}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.steps li{border:1px solid var(--color-border);border-radius:12px;padding:14px}
.countdown{font-variant-numeric:tabular-nums;font-weight:700}
.toasts{position:fixed;left:16px;right:16px;bottom:16px;display:grid;gap:8px;max-width:720px;margin:0 auto;z-index:30}
.toast{background:#111c3f;color:#fff;border-radius:12px;padding:12px 16px}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:10px;border-bottom:1px solid var(--color-border)}
.tablewrap{overflow:auto;border:1px solid var(--color-border);border-radius:12px}
.tablewrap table th,.tablewrap table td{padding:10px 12px}
th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--color-muted-foreground)}
/* --- Checkout: tap zone --- */
.tapzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:36px 16px;border:2px dashed var(--color-border);border-radius:var(--radius);margin:4px 0;cursor:pointer}
.tapzone .icon{width:44px;height:44px}
.tapzone.listening{border-color:var(--color-accent);border-style:solid;animation:pulse-ring 1.8s infinite}
@keyframes pulse-ring{0%{box-shadow:0 0 0 0 rgba(124,58,237,.35)}70%{box-shadow:0 0 0 18px rgba(124,58,237,0)}100%{box-shadow:0 0 0 0 rgba(124,58,237,0)}}
/* --- Transaction view: big balance + big actions --- */
.txhead{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.txhead .balance{font-size:56px}
.chip{display:inline-block;padding:3px 10px;border-radius:999px;border:1px solid var(--color-border);font-size:12px;font-weight:700;color:var(--color-muted-foreground)}
.txactions{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.txactions .btn{min-height:56px}
@media (max-width:480px){.txactions{grid-template-columns:1fr}}
/* --- PIN pad --- */
.pinpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:340px;margin:0 auto;width:100%}
.pinpad button{min-height:60px;font-size:22px;font-weight:700;border-radius:12px;border:1px solid var(--color-border);background:var(--color-card);color:inherit;cursor:pointer;padding:8px}
.pinpad button:active{transform:scale(.97)}
.pindots{display:flex;gap:10px;justify-content:center;min-height:16px;margin:6px 0}
.pindots span{width:14px;height:14px;border-radius:50%;background:var(--color-border);display:inline-block}
.pindots span.filled{background:var(--color-foreground)}
/* --- Customer list rows --- */
.rowlist{display:grid;gap:8px}
.row-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px;border:1px solid var(--color-border);border-radius:12px;text-decoration:none;color:inherit;min-height:56px;background:var(--color-card);transition:background .15s,transform .1s}
.row-item:hover{background:var(--color-muted)}
.row-item:active{transform:scale(.995)}
.row-item .who{display:grid;gap:2px;min-width:0}
.row-item .who b{font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row-item .who span{font-size:13px;color:var(--color-muted-foreground)}
.row-item .meta{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;flex-shrink:0}
/* --- Hero balance (customer detail) --- */
.hero{display:grid;gap:4px;padding:14px 0 6px}
.hero .balance{font-size:64px}
.hero .label{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--color-muted-foreground)}
/* --- Skeleton loading --- */
.skeleton{position:relative;overflow:hidden;border:1px solid var(--color-border);border-radius:12px;min-height:56px;background:var(--color-muted)}
.skeleton::after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);animation:shimmer 1.4s infinite}
@keyframes shimmer{100%{transform:translateX(100%)}}
/* --- Collapsible form sections --- */
details.section{border:1px solid var(--color-border);border-radius:12px;padding:12px 14px}
details.section summary{cursor:pointer;font-weight:700;min-height:32px;display:flex;align-items:center}
/* --- Login screen --- */
.login-card{max-width:380px;margin:0 auto;display:grid;gap:16px;padding:28px 22px;margin-top:8vh;text-align:left}
.login-card .brand{justify-content:center;font-size:18px}
/* --- Search bar --- */
.searchbar{display:flex;gap:8px;align-items:stretch}
.searchbar input{flex:1}
/* --- Modal --- */
.modal-overlay{position:fixed;inset:0;z-index:40;background:rgba(4,8,22,.55);display:flex;align-items:center;justify-content:center;padding:16px}
.modal{max-width:420px;width:100%;max-height:calc(100vh - 32px);overflow:auto}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}