:root{
  --bg:#f6f7f9; --panel:#fff; --line:#dfe3e8; --line2:#eef1f4;
  --ink:#1c2430; --muted:#6b7684; --accent:#1a5fb4; --accent-bg:#d8ecff;
  --val:#12508f; --hover:#f0f7ff; --danger:#b3261e;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font:13px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  background:var(--bg); color:var(--ink);
}

/* ---------- login ---------- */
.login-body{display:flex;align-items:center;justify-content:center;height:100vh}
.login-card{
  background:var(--panel);padding:28px 30px;border-radius:10px;width:330px;
  border:1px solid var(--line);box-shadow:0 6px 24px rgba(20,30,50,.08)
}
.login-card h1{margin:0;font-size:19px}
.login-card .sub{margin:4px 0 18px;color:var(--muted);font-size:12px}
.login-card label{display:block;margin:12px 0 4px;font-weight:600;font-size:12px}
.login-card input{
  width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:6px;font-size:14px
}
.login-card input:focus{outline:2px solid var(--accent-bg);border-color:var(--accent)}
.login-card button{
  margin-top:18px;width:100%;padding:9px;border:0;border-radius:6px;
  background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer
}
.login-card button:hover{filter:brightness(1.08)}
.err{background:#fdecea;color:var(--danger);padding:8px 10px;border-radius:6px;font-size:12px}

/* ---------- chrome ---------- */
.topbar,.navbar,.wf-head{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:7px 12px;background:var(--panel);border-bottom:1px solid var(--line)
}
.brand{font-weight:700;font-size:14px;letter-spacing:.2px}
.spacer{flex:1}
.user{color:var(--muted);font-size:12px}
.ctl{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.ctl.checkbox{gap:5px}
.ctl select,.ctl input[type=range]{font-size:12px}
.ctl select{padding:3px 6px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink)}
.pill{background:var(--line2);border-radius:9px;padding:1px 7px;font-variant-numeric:tabular-nums;color:var(--ink)}

.btn{
  border:1px solid var(--line);background:#fff;color:var(--ink);
  padding:4px 10px;border-radius:5px;cursor:pointer;font-size:12px
}
.btn:hover{background:var(--hover);border-color:var(--accent)}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{color:var(--muted)}
.btn.sm{padding:2px 8px;font-size:11px}
.btn.step{min-width:46px;font-variant-numeric:tabular-nums}
a.btn{text-decoration:none}

.navbar input[type=range]{flex:1;min-width:180px}
.rangelbl{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.rangelbl b{color:var(--ink)}

/* ---------- panels ---------- */
.panel{background:var(--panel);border-bottom:1px solid var(--line);padding:8px 12px 12px}
.panel.hidden{display:none}
.panel-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.checkgrid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));
  gap:2px 14px;max-height:230px;overflow:auto
}
.checkgrid label{display:flex;align-items:center;gap:6px;font-size:12px;padding:2px 0;cursor:pointer}
.checkgrid label:hover{color:var(--accent)}
.checkgrid .ico{width:22px;text-align:center;color:var(--muted)}
.checkgrid .u{color:var(--muted);font-size:11px}
.checkgrid .swatch{
  width:11px;height:11px;border-radius:2px;flex:0 0 11px;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.14)
}
.muted{color:var(--muted);font-size:12px}

/* ---------- flowsheet ---------- */
.flow-wrap{overflow:auto;max-height:46vh;background:var(--panel);border-bottom:1px solid var(--line)}
.loading,.hint{padding:16px;color:var(--muted)}
table.pf{border-collapse:separate;border-spacing:0;font-size:12px;width:max-content}
table.pf th,table.pf td{
  border-right:1px solid var(--line2);border-bottom:1px solid var(--line2);
  padding:2px 7px;white-space:nowrap;text-align:center
}
table.pf thead th{
  position:sticky;top:0;z-index:3;background:#f4f6f8;font-weight:600;
  cursor:pointer;font-variant-numeric:tabular-nums
}
table.pf th.rowhead{
  position:sticky;left:0;z-index:2;background:var(--panel);text-align:left;
  font-weight:500;min-width:210px;border-right:1px solid var(--line)
}
table.pf thead th.corner{z-index:4;background:#f4f6f8;left:0;position:sticky}
table.pf tbody tr:nth-child(even) th.rowhead{background:#fbfcfd}
table.pf tbody tr:nth-child(even) td{background:#fcfdfe}
table.pf tbody tr:hover td{background:var(--hover)}
table.pf td{cursor:pointer;font-variant-numeric:tabular-nums;min-width:44px}
table.pf td.v{color:var(--val);font-weight:600}
table.pf .sel{background:#bfdfff!important;box-shadow:inset 0 0 0 2px var(--accent)}
table.pf .selcol{background:var(--accent-bg)!important}
table.pf thead th.sel{background:#bfdfff!important;box-shadow:none}
.rowhead .ico{display:inline-block;width:20px;color:var(--muted)}
.rowhead .u{color:var(--muted);font-size:11px;margin-left:3px}

/* ---------- waveforms ---------- */
.wf-section{background:var(--panel)}
.wf-body{padding:6px 12px 14px}
.wf-body.hidden{display:none}
.wf-row{display:flex;align-items:stretch;gap:8px;margin-bottom:2px}
.wf-label{
  width:104px;flex:0 0 104px;text-align:right;padding-top:6px;
  font-size:12px;line-height:1.25
}
.wf-label .n{font-weight:600}
.wf-label .u{display:block;color:var(--muted);font-size:11px}
.wf-canvas-holder{flex:1;position:relative;min-width:0}
.wf-canvas-holder canvas{display:block;width:100%;height:100%}
.wf-empty{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--danger);font-size:12px;gap:4px
}
.wf-empty a.jump{color:var(--accent)}
.wf-axis{margin-left:112px;color:var(--muted);font-size:11px;
  display:flex;justify-content:space-between;font-variant-numeric:tabular-nums}
.wf-warn{padding:10px 12px;color:var(--danger);font-size:12px}
.wf-note{padding:5px 0 7px;color:var(--muted);font-size:11.5px}
.clamped{color:var(--muted);font-weight:400}

.foot{display:flex;gap:16px;padding:6px 12px;border-top:1px solid var(--line);flex-wrap:wrap}