:root{
  --ink:#0b1220;
  --bg:#f4f6fb;
  --panel:#ffffff;
  --line:#e3e8f2;
  --muted:#6b7a90;
  --accent:#4f46e5;
  --accent-ink:#3730a3;
  --teal:#0d9488;
  --danger:#dc2626;
  --warn:#b45309;
  --radius:14px;
  --shadow:0 1px 2px rgba(11,18,32,.06),0 8px 24px -12px rgba(11,18,32,.18);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:"Inter",-apple-system,"Segoe UI","PingFang HK","Noto Sans TC","Microsoft JhengHei",sans-serif;
  background:var(--bg);
  color:var(--ink);
  display:grid;
  grid-template-rows:64px minmax(0,1fr) 272px;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ── top bar ─────────────────────────────────────────── */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line);
  gap:16px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.logo{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,#4f46e5,#7c3aed 55%,#db2777);
  color:#fff;font-weight:800;font-size:12px;letter-spacing:.5px;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:15px}
.brand-text .by{font-weight:600;font-size:11.5px;color:var(--muted);letter-spacing:.2px;margin-left:2px}
.brand-text small{color:var(--muted);font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:10px}
.clock{font-variant-numeric:tabular-nums;color:var(--muted);font-size:13px;letter-spacing:.4px}

.badge{
  font-size:11.5px;padding:5px 10px;border-radius:999px;font-weight:600;
  background:#eef2ff;color:var(--accent-ink);border:1px solid #e0e7ff;white-space:nowrap;
}
.badge b{font-variant-numeric:tabular-nums}
.badge-ghost{background:#f8fafc;color:var(--muted);border-color:var(--line)}
.badge-ok{background:#ecfdf5;color:#047857;border-color:#a7f3d0}
.badge-warn{background:#fff7ed;color:var(--warn);border-color:#fed7aa}
.badge-err{background:#fef2f2;color:var(--danger);border-color:#fecaca}

/* ── layout ──────────────────────────────────────────── */
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px 356px;
  gap:14px;padding:14px 20px;min-height:0;
}
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);display:flex;flex-direction:column;min-height:0;overflow:hidden;
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 14px;border-bottom:1px solid var(--line);flex:0 0 auto;
}
.panel-head h2{margin:0;font-size:13px;font-weight:700;letter-spacing:.3px;text-transform:uppercase;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:12px}

/* ── catalog ─────────────────────────────────────────── */
.catalog{
  padding:14px;display:grid;gap:10px;overflow:auto;
  grid-template-columns:repeat(auto-fill,minmax(146px,1fr));
  align-content:start;
}
.product{
  border:1px solid var(--line);border-radius:12px;background:#fff;
  padding:12px 10px;cursor:pointer;text-align:center;
  transition:transform .08s ease,border-color .15s,box-shadow .15s;
  display:flex;flex-direction:column;gap:6px;align-items:center;
}
.product:hover{border-color:#c7d2fe;box-shadow:0 6px 18px -10px rgba(79,70,229,.5)}
.product:active{transform:scale(.97)}
.product .glyph{
  font-size:28px;width:52px;height:52px;border-radius:14px;display:grid;place-items:center;
  background:#f1f5fd;
}
.product .name{font-size:12.5px;font-weight:600;line-height:1.3;min-height:32px;display:flex;align-items:center}
.product .price{font-size:14px;font-weight:800;color:var(--accent-ink);font-variant-numeric:tabular-nums}
.product .cat{font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

/* ── cart ────────────────────────────────────────────── */
.cart-lines{flex:1 1 auto;overflow:auto;padding:10px 12px;display:flex;flex-direction:column;gap:8px}
.empty{color:var(--muted);font-size:12.5px;padding:18px 4px;text-align:center}
.cart-line{
  display:grid;grid-template-columns:1fr auto auto;gap:8px;align-items:center;
  border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fcfdff;
}
.cart-line .cl-name{font-size:12.5px;font-weight:600;line-height:1.3}
.cart-line .cl-price{font-size:11.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.qty{display:flex;align-items:center;gap:2px;background:#eef2ff;border-radius:8px;padding:2px}
.qty button{
  width:22px;height:22px;border:0;border-radius:6px;background:#fff;color:var(--accent-ink);
  font-weight:800;cursor:pointer;line-height:1;font-size:13px;
}
.qty button:hover{background:#e0e7ff}
.qty span{min-width:18px;text-align:center;font-size:12.5px;font-weight:700;font-variant-numeric:tabular-nums}
.cl-total{font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;min-width:62px;text-align:right}

.cart-foot{border-top:1px solid var(--line);padding:12px;flex:0 0 auto;background:#fbfcff}
.totals{margin-bottom:10px}
.total-row{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);padding:2px 0}
.total-row b{color:var(--ink);font-variant-numeric:tabular-nums}
.total-row.grand{font-size:14px;color:var(--ink);align-items:baseline}
.total-row.grand b{font-size:22px;font-weight:800;letter-spacing:-.5px}

/* ── buttons ─────────────────────────────────────────── */
.btn{
  border:1px solid transparent;border-radius:10px;cursor:pointer;font-family:inherit;
  font-weight:700;transition:background .15s,border-color .15s,opacity .15s;
}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-text{background:transparent;border:0;color:var(--muted);font-size:12px;padding:4px 6px;font-weight:600}
.btn-text:hover{color:var(--accent-ink)}
.btn-text.danger:hover{color:var(--danger)}
.btn-pay{
  width:100%;padding:14px;font-size:15px;color:#fff;
  background:linear-gradient(135deg,#4f46e5,#6d28d9);border-radius:12px;
  display:flex;align-items:center;justify-content:center;gap:9px;
  box-shadow:0 10px 22px -12px rgba(79,70,229,.9);
}
.btn-pay:not(:disabled):hover{background:linear-gradient(135deg,#4338ca,#5b21b6)}
.octo-dot{width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#a78bfa,#f472b6)}
.pay-hint{font-size:11.5px;color:var(--muted);text-align:center;margin-top:7px}
.btn-primary{background:var(--accent);color:#fff;padding:10px 18px;font-size:13px}
.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);padding:9px 14px;font-size:12.5px}
.btn-ghost:hover{border-color:#c7d2fe;background:#f8faff}
.btn-ghost.danger{color:var(--danger);border-color:#fecaca}
.btn-tap{
  width:100%;padding:13px;font-size:14px;border-radius:12px;color:#fff;
  background:linear-gradient(135deg,#0d9488,#0891b2);
}
.btn-tap:not(:disabled):hover{background:linear-gradient(135deg,#0f766e,#0e7490)}

/* ── device ──────────────────────────────────────────── */
.device-panel{background:#0f1626;border-color:#1e293b;color:#e6edf7}
.device-panel .panel-head{border-bottom-color:#1e293b}
.device-panel .panel-head h2{color:#8fa3bf}
.device-panel .btn-text{color:#8fa3bf}
.device-panel .btn-text:hover{color:#fff}

.lcd{
  margin:12px;padding:14px;border-radius:12px;background:#05070c;
  border:1px solid #1e293b;flex:1 1 auto;min-height:110px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  position:relative;overflow:hidden;text-align:center;
}
.lcd::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.028) 0 1px,transparent 1px 3px);
}
.lcd-line{font-size:11.5px;color:#6b87a8}
.lcd-big{font-size:20px;font-weight:800;color:#c7f9e5;letter-spacing:.3px}
.lcd-big.err{color:#fca5a5}
.lcd-big.ok{color:#86efac}
.lcd-img{font-size:30px;line-height:1;height:0;overflow:hidden;transition:height .2s}
.lcd-img.show{height:34px}
.lcd.tapping{animation:pulse 1.1s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:inset 0 0 0 0 rgba(13,148,136,0)}50%{box-shadow:inset 0 0 0 2px rgba(13,148,136,.55)}}

.device-controls{padding:0 12px 12px;display:flex;flex-direction:column;gap:9px;flex:0 0 auto}
.field{display:flex;flex-direction:column;gap:5px}
.field > span{font-size:11px;color:#8fa3bf;font-weight:600;letter-spacing:.3px}
.field select{
  padding:9px 10px;border-radius:9px;border:1px solid #24344d;background:#162033;color:#e6edf7;
  font-family:inherit;font-size:12.5px;
}
.check{display:flex;align-items:center;gap:7px;font-size:12px;color:#b6c6dc;cursor:pointer}
.check input{accent-color:#0d9488;width:14px;height:14px}
.device-note{font-size:10.5px;color:#6b87a8;line-height:1.45}

/* ── dock ────────────────────────────────────────────── */
.dock{
  background:var(--panel);border-top:1px solid var(--line);
  display:flex;flex-direction:column;min-height:0;
}
.tabs{display:flex;gap:4px;padding:8px 20px 0;border-bottom:1px solid var(--line);flex:0 0 auto}
.tab{
  border:0;background:transparent;font-family:inherit;font-size:12.5px;font-weight:600;
  color:var(--muted);padding:8px 12px;border-radius:9px 9px 0 0;cursor:pointer;
  display:flex;align-items:center;gap:7px;border-bottom:2px solid transparent;
}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--accent-ink);border-bottom-color:var(--accent);background:#f7f8ff}
.pill{
  background:#eef2ff;color:var(--accent-ink);font-size:10.5px;padding:1px 6px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.tab-body{flex:1 1 auto;min-height:0;position:relative}
.tab-pane{position:absolute;inset:0;overflow:auto;padding:12px 20px;display:none}
.tab-pane.active{display:block}

/* ── tables ──────────────────────────────────────────── */
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:12px}
th{
  text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.5px;
  color:var(--muted);font-weight:700;padding:6px 8px;border-bottom:1px solid var(--line);
  position:sticky;top:0;background:var(--panel);
}
td{padding:7px 8px;border-bottom:1px solid #f1f5fb;font-variant-numeric:tabular-nums;white-space:nowrap}
tbody tr:hover{background:#fafbff}
.tnum{font-variant-numeric:tabular-nums}
.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:5px;vertical-align:middle}
.dot-ok{background:#10b981}
.dot-fail{background:#ef4444}
.dot-pending{background:#f59e0b}

/* ── logs ────────────────────────────────────────────── */
.logs{display:flex;flex-direction:column;gap:6px;font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace}
.log{
  border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;
  padding:7px 10px;background:#fcfdff;font-size:11.5px;
}
.log.res-fail{border-left-color:var(--danger);background:#fffafa}
.log.res-ok{border-left-color:#10b981}
.log-top{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:10.5px;margin-bottom:3px}
.log-cmd{font-weight:700;color:var(--accent-ink)}
.log-json{color:#334155;white-space:pre-wrap;word-break:break-word;line-height:1.45}
.log-json .k{color:#7c3aed}
.log-json .s{color:#0f766e}

/* ── cases ───────────────────────────────────────────── */
.cases{display:grid;gap:6px;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));align-content:start}
.case{
  display:grid;grid-template-columns:26px 1fr auto;gap:9px;align-items:start;
  border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fcfdff;
}
.case-no{
  font-size:11px;font-weight:800;color:var(--accent-ink);background:#eef2ff;
  border-radius:6px;text-align:center;padding:2px 0;
}
.case-body{min-width:0}
.case-title{font-size:12px;font-weight:600;line-height:1.35}
.case-sub{font-size:10.5px;color:var(--muted);line-height:1.35;margin-top:2px}
.case-actions{display:flex;gap:4px;align-items:center}
.case-btn{
  border:1px solid var(--line);background:#fff;border-radius:7px;font-size:10.5px;
  font-weight:700;padding:4px 7px;cursor:pointer;font-family:inherit;color:var(--muted);
}
.case-btn:hover{border-color:#c7d2fe;color:var(--accent-ink)}
.case-btn.pass{background:#ecfdf5;border-color:#a7f3d0;color:#047857}
.case-btn.fail{background:#fef2f2;border-color:#fecaca;color:var(--danger)}

/* ── tools ───────────────────────────────────────────── */
.tools{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}

/* ── modal ───────────────────────────────────────────── */
.modal{
  position:fixed;inset:0;background:rgba(11,18,32,.55);backdrop-filter:blur(3px);
  display:none;place-items:center;padding:20px;z-index:50;
}
.modal.open{display:grid}
/* 付款狀態卡：不阻擋背後的讀卡器操作（考試時要一邊斷線／拍卡） */
.modal.pay-modal{
  pointer-events:none;background:rgba(11,18,32,.14);
  place-items:end center;padding-bottom:22px;
}
.modal.pay-modal .pay-card{pointer-events:auto;box-shadow:0 24px 60px -18px rgba(11,18,32,.6)}
.modal-card{
  background:var(--panel);border-radius:18px;padding:20px;width:min(440px,100%);
  box-shadow:0 30px 70px -20px rgba(11,18,32,.5);max-height:92vh;overflow:auto;
}
.modal-head,.pay-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.modal-head h3,.pay-head h3{margin:0;font-size:15px}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:14px}

.pay-card{text-align:center}
.pay-head{text-align:left}
.pay-amount{font-size:40px;font-weight:800;letter-spacing:-1.5px;margin:4px 0 6px}
.pay-stage{font-size:13px;color:var(--muted);min-height:20px}
.pay-progress{height:5px;background:#eef2ff;border-radius:99px;overflow:hidden;margin:14px 0 12px}
.pay-progress .bar{height:100%;width:0;background:linear-gradient(90deg,#4f46e5,#0d9488);transition:width .3s}
.pay-meta{
  display:grid;grid-template-columns:auto 1fr;gap:4px 12px;text-align:left;
  font-size:11.5px;padding-top:10px;border-top:1px solid var(--line);
}
.pay-meta span{color:var(--muted)}
.pay-meta b{font-variant-numeric:tabular-nums;text-align:right}

/* ── receipt ─────────────────────────────────────────── */
.receipt{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11.5px;line-height:1.55;
  background:#fff;border:1px dashed #cbd5e1;border-radius:10px;padding:16px;
  white-space:pre-wrap;color:#0b1220;
}
.settle{font-size:12.5px}
.settle table{font-size:12px}
.settle h4{margin:14px 0 6px;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}

/* ── toast ───────────────────────────────────────────── */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);
  background:#0b1220;color:#fff;padding:10px 18px;border-radius:11px;font-size:12.5px;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:80;
  box-shadow:0 18px 40px -14px rgba(11,18,32,.7);
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.err{background:#7f1d1d}

/* ── print ───────────────────────────────────────────── */
@media print{
  body > *:not(.modal){display:none !important}
  .modal{position:static;background:#fff;display:block !important}
  .modal:not(#receiptModal){display:none !important}
  .modal-card{box-shadow:none;width:100%;padding:0}
  .modal-head,.modal-actions{display:none !important}
  .receipt{border:0;padding:0;font-size:12px}
}

@media (max-width:1250px){
  body{display:block;height:auto;min-height:100vh;overflow:auto}
  .layout{
    grid-template-columns:minmax(0,1fr) 300px;
    grid-template-rows:auto auto;
  }
  .catalog-panel,.cart-panel{height:min(46vh,420px)}
  .device-panel{
    grid-column:1 / -1;display:grid;height:auto;
    grid-template-columns:minmax(0,1fr) 330px;
    grid-template-rows:auto auto;
  }
  .device-panel .panel-head{grid-column:1 / -1}
  .device-panel .lcd{margin:0 0 12px 12px;min-height:96px}
  .device-panel .device-controls{padding:0 12px 12px 0}
  .dock{min-height:320px}
  .tab-body{min-height:264px}
}

@media (max-width:820px){
  .layout{grid-template-columns:1fr}
  .device-panel{grid-template-columns:1fr}
  .device-panel .lcd{margin:0 12px 12px}
  .device-panel .device-controls{padding:0 12px 12px}
  .catalog-panel,.cart-panel{height:auto;max-height:none}
  .catalog{max-height:440px}
  .cart-lines{max-height:280px}
}