/* ui.css — Khammind POS design system (modern · touch-friendly · light/dark) */
:root{
  --bg:#f5f6f8; --panel:#ffffff; --panel-2:#f0f2f5; --panel-3:#e6e9ee;
  --line:#e2e6ec; --line-strong:#cfd5de;
  --text:#1a2130; --muted:#6b7686; --faint:#9aa5b3;
  --primary:#16a34a; --primary-ink:#052e16; --primary-soft:#dcfce7;
  --accent:#2563eb; --accent-soft:#dbeafe;
  --warn:#d97706; --warn-soft:#fef3c7; --danger:#dc2626; --danger-soft:#fee2e2;
  --ok:#16a34a; --ok-soft:#dcfce7;
  --radius:16px; --radius-sm:10px; --shadow:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --shadow-lg:0 10px 30px rgba(16,24,40,.12);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0b0f17; --panel:#141a24; --panel-2:#1b222e; --panel-3:#232c3a;
    --line:#26303e; --line-strong:#35404f;
    --text:#e6ebf2; --muted:#93a0b3; --faint:#66748a;
    --primary:#22c55e; --primary-ink:#052e16; --primary-soft:#0f2c1c;
    --accent:#3b82f6; --accent-soft:#12233f;
    --warn:#f59e0b; --warn-soft:#3a2c0c; --danger:#ef4444; --danger-soft:#3a1717;
    --ok:#22c55e; --ok-soft:#0f2c1c;
    --shadow:0 1px 3px rgba(0,0,0,.4); --shadow-lg:0 12px 34px rgba(0,0,0,.5);
  }
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans Thai',sans-serif;background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}
button{font-family:inherit}
a{color:var(--accent);text-decoration:none}

/* ---- app layout: sidebar + main ---- */
.app{display:flex;min-height:100vh}
.sidebar{width:230px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:10px;padding:16px 18px;font-weight:800;font-size:18px;border-bottom:1px solid var(--line)}
.brand .logo{font-size:22px}
.nav{flex:1;overflow-y:auto;padding:10px 8px}
.nav a{display:flex;align-items:center;gap:11px;padding:11px 13px;border-radius:var(--radius-sm);color:var(--text);font-weight:600;font-size:15px;margin-bottom:2px}
.nav a .ico{font-size:18px;width:22px;text-align:center}
.nav a:hover{background:var(--panel-2)}
.nav a.active{background:var(--primary);color:#fff}
.nav .sec{font-size:11px;font-weight:700;color:var(--faint);text-transform:uppercase;letter-spacing:.5px;padding:14px 13px 6px}
.sideft{padding:12px;border-top:1px solid var(--line)}
.userbox{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.userbox .avatar{width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex-shrink:0}
.userbox .uemail{font-size:12px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:130px}
.brand .logo img{width:26px;height:26px;border-radius:7px;object-fit:cover;display:block}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:12px;padding:14px 22px;border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:20}
.topbar h1{font-size:18px;margin:0;font-weight:700}
.content{padding:22px;max-width:1200px;width:100%;margin:0 auto}

/* mobile */
.menu-btn{display:none;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;width:40px;height:40px;font-size:18px;cursor:pointer}
@media(max-width:820px){
  .sidebar{position:fixed;z-index:60;transform:translateX(-100%);transition:transform .2s;box-shadow:var(--shadow-lg)}
  .sidebar.open{transform:none}
  .menu-btn{display:block}
  .content{padding:16px}
  .backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:55}
  .backdrop.show{display:block}
}

/* ---- cards / grid ---- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.grid{display:grid;gap:14px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.kpi .lbl{font-size:13px;color:var(--muted);font-weight:600;display:flex;align-items:center;gap:6px}
.kpi .val{font-size:26px;font-weight:800;margin-top:4px;line-height:1.15}
.kpi .sub{font-size:12px;color:var(--faint);margin-top:2px}
.kpi.accent{background:linear-gradient(135deg,var(--primary),#0e7a38);color:#fff;border:0}
.kpi.accent .lbl,.kpi.accent .sub{color:rgba(255,255,255,.85)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:var(--radius-sm);padding:11px 16px;font-size:15px;font-weight:700;cursor:pointer;background:var(--panel-2);color:var(--text);transition:filter .12s}
.btn:hover{filter:brightness(.97)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-ghost{background:transparent;border:1px solid var(--line-strong)}
.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn-lg{padding:15px 22px;font-size:17px}
.btn:disabled{opacity:.5;cursor:default}
.btn-block{width:100%}

/* ---- forms ---- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field>span{font-size:13px;font-weight:600;color:var(--muted)}
input,select,textarea{font-family:inherit;font-size:15px;padding:11px 13px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--panel);color:var(--text);width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid var(--primary-soft);border-color:var(--primary)}
textarea{resize:vertical;min-height:64px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:560px){.form-row{grid-template-columns:1fr}}

/* ---- toolbar / chips / pills ---- */
.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.toolbar .title{font-size:18px;font-weight:700;margin:0}
.spacer{flex:1}
.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;border:1px solid var(--line-strong);background:var(--panel);font-size:13px;font-weight:600;cursor:pointer}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.pill{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:700}
.pill-ok{background:var(--ok-soft);color:var(--ok)} .pill-warn{background:var(--warn-soft);color:var(--warn)}
.pill-danger{background:var(--danger-soft);color:var(--danger)} .pill-accent{background:var(--accent-soft);color:var(--accent)}
.search{position:relative;flex:1;min-width:160px;max-width:340px}
.search input{padding-left:36px}
.search::before{content:"🔍";position:absolute;left:12px;top:50%;transform:translateY(-50%);font-size:14px;opacity:.6}

/* ---- table ---- */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto;background:var(--panel);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:14px}
th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;font-weight:700;background:var(--panel-2)}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.row-act{white-space:nowrap;text-align:right;width:1%}

/* ---- menu/product cards ---- */
.prodgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.prod{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:transform .1s,box-shadow .1s;display:flex;flex-direction:column}
.prod:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.prod .img{aspect-ratio:4/3;background:var(--panel-3) center/cover no-repeat;display:flex;align-items:center;justify-content:center;font-size:32px;color:var(--faint)}
.prod .body{padding:11px 13px}
.prod .name{font-weight:700;font-size:14px;line-height:1.3;margin-bottom:4px}
.prod .price{font-weight:800;color:var(--primary)}
.prod .meta{font-size:12px;color:var(--muted);margin-top:3px}

/* ---- modal ---- */
.modal-bg{position:fixed;inset:0;background:rgba(10,15,25,.55);display:flex;align-items:flex-start;justify-content:center;padding:24px 16px;z-index:100;overflow-y:auto}
.modal{background:var(--panel);border-radius:var(--radius);width:100%;max-width:520px;box-shadow:var(--shadow-lg);margin:auto}
.modal.lg{max-width:820px}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal-head h3{margin:0;font-size:17px}
.modal-body{padding:20px}
.modal-foot{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--line);align-items:center}
.icon-btn{background:transparent;border:0;font-size:20px;cursor:pointer;color:var(--muted);width:34px;height:34px;border-radius:8px}
.icon-btn:hover{background:var(--panel-2)}

/* ---- toast ---- */
.toast-wrap{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:#1a2130;color:#fff;padding:12px 18px;border-radius:999px;font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);animation:tin .2s}
.toast.ok{background:var(--primary)} .toast.err{background:var(--danger)}
@keyframes tin{from{opacity:0;transform:translateY(8px)}}

/* ---- misc ---- */
.empty{text-align:center;padding:48px 20px;color:var(--muted)}
.empty .big{font-size:40px;margin-bottom:8px}
.muted{color:var(--muted)} .faint{color:var(--faint)}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}
.loading{padding:40px;text-align:center;color:var(--muted)}
.bar{height:8px;border-radius:6px;background:var(--panel-3);overflow:hidden}
.bar>i{display:block;height:100%;background:var(--primary)}
.net-off{color:var(--warn)}