:root {
  --bg: #eef1f4; --panel: #ffffff; --line: #e0e4e9; --line2: #cdd3da;
  --text: #1b2026; --dim: #6b7581; --accent: #1f6fd0; --accent2: #2b7cd3;
  --port: #2b7cd3; --porth: #17b877; --ok: #1a8a4f; --hover: #eef3f9;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, sans-serif; overflow: hidden; }
body { display: flex; flex-direction: column; }

#topbar { flex: none; height: 46px; display: flex; align-items: center; gap: 10px;
  padding: 0 12px; background: #ffffff; border-bottom: 1px solid var(--line); position: relative; z-index: 20; }
#topbar .brand { font-weight: 700; }
#topbar .brand #version { color: var(--dim); font-weight: 400; font-size: 11px; margin-left: 3px; }
#topbar .grow { flex: 1; }
#topbar #asm-name { width: 240px; padding: 5px 9px; background: #fff; border: 1px solid var(--line2);
  border-radius: 6px; color: var(--text); font: inherit; text-align: center; }
#topbar #asm-name:focus { outline: none; border-color: var(--accent2); }
.mbtn { background: #fff; border: 1px solid var(--line2); color: var(--text);
  border-radius: 6px; padding: 5px 10px; cursor: pointer; font: inherit; }
.mbtn:hover { border-color: var(--accent2); }
.menuitem { background: transparent; border: none; color: var(--text); border-radius: 5px;
  padding: 5px 9px; cursor: pointer; font: inherit; }
.menuitem:hover { background: var(--hover); }
.menuitem.on { background: var(--accent2); color: #fff; }
.ticon { background: #fff; border: 1px solid var(--line2); color: var(--text); border-radius: 6px;
  width: 28px; height: 28px; cursor: pointer; font-size: 15px; line-height: 1; display: inline-flex;
  align-items: center; justify-content: center; }
.ticon:hover:not(:disabled) { border-color: var(--accent2); }
.ticon:disabled { opacity: .4; cursor: default; }
.tbsep { width: 1px; height: 22px; background: var(--line2); }
.menu { position: relative; }
.dropdown { position: absolute; top: 34px; left: 0; background: #fff; border: 1px solid var(--line2);
  border-radius: 7px; padding: 4px; min-width: 160px; box-shadow: 0 6px 20px rgba(20,30,50,.15); z-index: 30; }
.dropdown button { display: block; width: 100%; text-align: left; background: transparent; border: none;
  color: var(--text); padding: 7px 9px; border-radius: 5px; cursor: pointer; font: inherit; }
.dropdown button:hover { background: var(--accent2); color: #fff; }

#app { flex: 1; display: flex; min-height: 0; position: relative; }
#main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
#viewport { position: relative; flex: 1; min-width: 0; }
#c { display: block; width: 100%; height: 100%; }

#tabbar { flex: none; height: 34px; display: flex; align-items: center; gap: 4px; padding: 4px 8px 0;
  background: #e7ebf0; border-bottom: 1px solid var(--line); }
#tabs { display: flex; gap: 4px; overflow-x: auto; }
.tab { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 6px 6px 0 0;
  background: #dde2e8; border: 1px solid var(--line2); border-bottom: none; color: var(--dim);
  cursor: pointer; font-size: 12px; white-space: nowrap; }
.tab.on { background: var(--bg); color: var(--text); border-color: var(--accent2); }
.tab .x { color: var(--dim); cursor: pointer; font-size: 11px; }
.tab .x:hover { color: var(--text); }

#viewctl { position: absolute; top: 12px; right: 12px; z-index: 6; display: flex; gap: 6px; }
.vbox { padding: 5px 11px; border-radius: 7px; border: 1px solid var(--line2); background: rgba(255,255,255,.9);
  color: var(--dim); cursor: pointer; font: inherit; font-size: 12px; backdrop-filter: blur(3px); }
.vbox:hover { border-color: var(--accent2); color: var(--text); }
.vbox.on { background: var(--accent2); border-color: var(--accent2); color: #fff; }

#catcount { font-size: 11px; font-weight: 400; letter-spacing: 0; text-transform: none; }

#circulate { position: static; padding: 10px 16px;
  border-radius: 9px; border: 1px solid var(--line2); background: #fff; color: var(--dim);
  cursor: not-allowed; font: inherit; font-weight: 600; box-shadow: 0 4px 16px rgba(20,30,50,.14); }
#circulate.ready { background: #e6f6ec; border-color: var(--ok); color: #12703f; cursor: pointer; }
#circulate.ready:hover { background: #d3efdd; }

#simmodal { position: fixed; inset: 0; z-index: 40; display: flex; align-items: center; justify-content: center;
  background: rgba(40,50,65,.35); }
#simmodal[hidden] { display: none; }
.sim-card { position: relative; width: min(560px, 94%); max-height: 82vh; overflow-y: auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; box-shadow: 0 16px 50px rgba(20,30,50,.25); }
.sim-x { position: absolute; top: 4px; right: 12px; background: none; border: none; color: var(--dim);
  font-size: 16px; cursor: pointer; }
.sim-x:hover { color: var(--text); }
.sim-steps { display: flex; gap: 6px; margin-bottom: 12px; }
.sim-steps .dot { flex: 1; height: 4px; border-radius: 2px; background: var(--line2); }
.sim-steps .dot.on { background: var(--accent2); }
#sim-title { margin: 0 0 14px; font-size: 18px; }
.sim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sim-grid label, .sim-row label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--dim); }
.sim-grid input, .sim-row input, .sim-row select { padding: 6px 8px; background: #fff; border: 1px solid var(--line2);
  border-radius: 6px; color: var(--text); font: inherit; }
.sim-row { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 8px; align-items: end; margin-top: 8px; }
.sim-row .pn { align-self: center; font-size: 13px; }
.sim-head { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 8px; font-size: 11px; color: var(--dim);
  text-transform: uppercase; letter-spacing: .03em; margin-top: 4px; }
.sim-blank { padding: 40px 0; text-align: center; color: var(--dim); }
.sim-actions { display: flex; justify-content: space-between; margin-top: 18px; }
.mbtn.ghost { color: var(--dim); background: transparent; }

.chk { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; }
#topvol { font-size: 13px; } #topvol.ok { color: var(--ok); }
#topvol b { color: var(--ok); }
.dim { color: var(--dim); }
#targetbar { background: #e7f0fb; border: 1px solid var(--accent2); border-radius: 7px;
  padding: 8px 9px; margin-bottom: 8px; font-size: 12px; }
#targetbar b { color: var(--accent); }
#targetbar .pdot { display: inline-block; width: 10px; height: 10px; border-radius: 50%;
  vertical-align: middle; margin-right: 6px; box-shadow: 0 0 0 1px rgba(0,0,0,.12); }
#targetbar .cancel { float: right; cursor: pointer; color: var(--dim); }
#targetbar .cancel:hover { color: var(--text); }
#targetbar .chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; }
#targetbar .chip { padding: 2px 9px; border-radius: 11px; border: 1px solid var(--line2);
  background: #fff; color: var(--dim); cursor: pointer; font-size: 11px; }
#targetbar .chip:hover { border-color: var(--accent2); color: var(--text); }
#targetbar .chip.on { background: var(--accent2); border-color: var(--accent2); color: #fff; }
.card.incompatible { opacity: .4; }

#startup { position: absolute; inset: 0; z-index: 8; display: flex; align-items: center;
  justify-content: center; background: radial-gradient(ellipse at center, rgba(238,241,244,.5), rgba(238,241,244,.9)); }
#startup[hidden] { display: none; }
.startup-card { width: min(560px, 90%); background: #fff; border: 1px solid var(--line);
  border-radius: 14px; padding: 22px 24px; box-shadow: 0 12px 40px rgba(20,30,50,.2); text-align: center; }
.startup-card h2 { margin: 0 0 4px; font-size: 20px; }
.startup-card p { margin: 0 0 16px; }
#startup-bases { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px; margin-bottom: 16px; }
.base-card { border: 1px solid var(--line2); border-radius: 10px; padding: 14px 12px; cursor: pointer;
  background: #f7f9fb; text-align: left; transition: border-color .12s, transform .12s; }
.base-card:hover { border-color: var(--accent2); transform: translateY(-2px); }
.base-card .bi { font-size: 22px; }
.base-card .bn { font-weight: 600; margin-top: 6px; }
.base-card .bm { font-size: 11px; color: var(--dim); margin-top: 3px; }
.base-card .badge { display: inline-block; font-size: 10px; padding: 0 6px; border-radius: 8px;
  background: #e3e8ee; color: var(--text); }
#startup-bases .empty { grid-column: 1 / -1; color: var(--dim); padding: 10px; }
.mbtn.wide { width: 100%; padding: 9px; }

button.mini { background: transparent; border: 1px solid var(--line2); color: var(--dim);
  border-radius: 5px; padding: 3px 9px; cursor: pointer; font: inherit; font-size: 12px; }
button.mini:hover { border-color: var(--accent2); color: var(--text); }

#catalog-panel { width: 300px; flex: none; background: var(--panel); border-left: 1px solid var(--line);
  display: flex; flex-direction: column; padding: 12px; transition: width .15s, padding .15s; overflow: hidden; }
#app.collapsed #catalog-panel { width: 0; padding: 0; border-left: none; }
.cphead { display: flex; align-items: center; justify-content: space-between; }
.cphead h3 { margin: 0; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--dim); }
#search { width: 100%; margin: 10px 0; padding: 7px 9px; background: #fff;
  border: 1px solid var(--line2); border-radius: 6px; color: var(--text); font: inherit; }
#catlist { overflow-y: auto; flex: 1; }
.card { border: 1px solid var(--line2); border-radius: 8px; padding: 8px 9px; margin-bottom: 8px;
  cursor: pointer; background: #fff; display: grid; grid-template-columns: 52px 1fr; gap: 9px; align-items: center; }
.card:hover { border-color: var(--accent2); box-shadow: 0 2px 8px rgba(20,30,50,.06); }
.card .thumb { width: 52px; height: 44px; border-radius: 6px; background: #f0f2f5; object-fit: contain;
  border: 1px solid var(--line); }
.card .thumb.ph { display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--dim); }
.card .cn { font-weight: 600; }
.card .cm { font-size: 11px; color: var(--dim); margin-top: 2px; }
.card .badge { display: inline-block; font-size: 10px; padding: 0 6px; border-radius: 8px;
  background: #e3e8ee; color: var(--text); margin-right: 5px; }
.card.termination .badge { background: #f3e7c6; color: #8a6a1c; }

#panel-toggle { position: absolute; top: 12px; right: 12px; z-index: 5; background: rgba(255,255,255,.9);
  border: 1px solid var(--line2); color: var(--text); border-radius: 6px; width: 30px; height: 30px;
  cursor: pointer; font-size: 15px; display: none; }
#app.collapsed #panel-toggle { display: block; }

#radial { position: absolute; z-index: 10; width: 0; height: 0; }
#radial .center { position: absolute; width: 54px; height: 54px; border-radius: 50%;
  transform: translate(-50%,-50%); background: rgba(255,255,255,.95); border: 1px solid var(--line2);
  display: flex; align-items: center; justify-content: center; color: var(--dim); font-size: 11px; text-align: center;
  box-shadow: 0 2px 10px rgba(20,30,50,.12); }
#radial .seg { position: absolute; transform: translate(-50%,-50%); min-width: 74px;
  background: #fff; border: 1px solid var(--accent2); color: var(--text);
  border-radius: 16px; padding: 6px 10px; cursor: pointer; text-align: center; font-size: 12px;
  box-shadow: 0 3px 12px rgba(20,30,50,.14); }
#radial .seg:hover { background: var(--accent2); color: #fff; }
#radial .seg .sc { display: block; font-size: 10px; color: var(--dim); }
#radial .seg:hover .sc { color: #eaf2fb; }

/* welcome / demo password gate */
#welcome { position: fixed; inset: 0; z-index: 60; display: flex; align-items: center; justify-content: center;
  background: rgba(238,241,244,.92); backdrop-filter: blur(4px); }
#welcome[hidden] { display: none; }
.welcome-card { width: min(520px, 92%); background: #fff; border: 1px solid var(--line);
  border-radius: 16px; padding: 28px 30px; box-shadow: 0 20px 60px rgba(20,30,50,.18); }
.welcome-card h1 { margin: 0 0 14px; font-size: 23px; }
.welcome-card h1 .wv { font-size: 11px; font-weight: 600; color: #fff; background: var(--accent2);
  padding: 2px 9px; border-radius: 20px; vertical-align: middle; margin-left: 8px;
  text-transform: uppercase; letter-spacing: .05em; }
.welcome-card p { margin: 0 0 12px; }
.welcome-pass-l { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--dim); margin-top: 14px; }
.welcome-pass-l input { padding: 10px 12px; background: #fff; border: 1px solid var(--line2);
  border-radius: 8px; color: var(--text); font: inherit; }
.welcome-pass-l input:focus { outline: none; border-color: var(--accent2); }
.welcome-err { color: #c0392b; font-size: 12px; min-height: 16px; margin: 7px 0 2px; }
.welcome-enter { width: 100%; padding: 11px; background: var(--accent2); border-color: var(--accent2);
  color: #fff; font-weight: 600; margin-top: 4px; }
.welcome-enter:hover { background: var(--accent); }

/* Simulate: step-3 mode chooser (disabled until the engine is wired) */
.sim-modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 8px 0 2px; }
.sim-mode { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  width: 100%; min-height: 132px; padding: 20px 14px; text-align: center; cursor: pointer;
  background: #fff; border: 1px solid var(--line2); border-radius: 12px; color: var(--text);
  transition: border-color .12s, box-shadow .12s, transform .12s; }
.sim-mode:hover:not(:disabled) { border-color: var(--accent2); box-shadow: 0 2px 10px rgba(20,30,50,.07); transform: translateY(-1px); }
.sim-mode-t { font-size: 15px; font-weight: 600; }
.sim-mode-d { font-size: 11.5px; color: var(--dim); }
.sim-mode:disabled { opacity: .5; cursor: not-allowed; background: var(--bg); }
.sim-modes-note { grid-column: 1 / -1; text-align: center; font-size: 12px; margin: 8px 0 0; }

/* viewport action stack: Simulate + (greyed) Convert to Lesker Cart */
#viewactions { position: absolute; bottom: 16px; right: 16px; z-index: 6;
  display: flex; flex-direction: column; align-items: stretch; gap: 8px; }
#lesker-cart { flex: none; margin-top: 10px; width: 100%; padding: 11px 14px;
  border-radius: 9px; border: 1px solid var(--line2); background: var(--bg); color: var(--dim);
  cursor: not-allowed; font: inherit; font-weight: 600; display: inline-flex;
  align-items: center; justify-content: center; gap: 8px; opacity: .7; }
#lesker-cart .arr { font-weight: 700; }

/* catalog panel: Catalog / BOM tabs */
.cptabs { display: flex; gap: 12px; }
.cptab { background: transparent; border: none; padding: 2px 0 6px; font: inherit; font-size: 13px;
  text-transform: uppercase; letter-spacing: .04em; color: var(--dim); cursor: pointer;
  border-bottom: 2px solid transparent; }
.cptab.on { color: var(--text); border-bottom-color: var(--accent2); }
.cptab:hover:not(.on) { color: var(--text); }
#catalog-view, #bom-view { display: flex; flex-direction: column; flex: 1; min-height: 0; }
#catalog-view[hidden], #bom-view[hidden] { display: none; }

/* BOM list */
#bomlist { overflow-y: auto; flex: 1; margin-top: 10px; }
.bom-headrow { display: flex; justify-content: space-between; font-size: 11px; text-transform: uppercase;
  letter-spacing: .04em; color: var(--dim); padding: 0 2px 6px; border-bottom: 1px solid var(--line); }
.bom-row { display: flex; align-items: center; gap: 10px; padding: 8px 2px; border-bottom: 1px solid var(--line); }
.bom-thumb { width: 42px; height: 34px; border-radius: 6px; background: #f0f2f5; object-fit: contain; flex: none; }
.bom-info { flex: 1; min-width: 0; }
.bom-name { font-weight: 600; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bom-meta { font-size: 11px; color: var(--dim); margin-top: 2px; }
.bom-qty { font-weight: 600; font-variant-numeric: tabular-nums; min-width: 22px; text-align: right; }
.bom-total { display: flex; justify-content: space-between; padding: 11px 2px 2px; font-weight: 600; }
.bom-empty { padding: 16px 2px; }
.cpcount { font-size: 11px; margin-top: 8px; min-height: 14px; }

/* assembly guide (bottom-left hint) */
#guide { position: absolute; left: 16px; bottom: 16px; z-index: 6; max-width: 250px;
  background: rgba(255,255,255,.94); border: 1px solid var(--line2); border-radius: 10px;
  padding: 11px 13px; box-shadow: 0 4px 16px rgba(20,30,50,.12); }
#guide[hidden] { display: none; }
.guide-h { display: flex; align-items: center; gap: 7px; font-size: 11px; text-transform: uppercase;
  letter-spacing: .04em; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.guide-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--porth);
  box-shadow: 0 0 0 3px rgba(23,184,119,.18); flex: none; }
.guide-b { font-size: 12.5px; color: var(--text); line-height: 1.42; }