:root{--bg:#0d1720;--panel:#172532;--panel2:#203342;--line:#2b4252;--text:#f4f7fa;--muted:#9fb0bf;--blue:#39a8e8;--cyan:#65d3ff;--green:#35c779;--yellow:#f2c94c;--orange:#f2994a;--red:#eb5757;--purple:#bb6bd9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,sans-serif;line-height:1.45}a{color:#7bcaff}.app-shell{display:grid;grid-template-columns:224px 1fr;min-height:100vh}.sidebar{background:#10202b;border-right:1px solid var(--line);padding:18px;position:sticky;top:0;height:100vh;overflow:auto}.brand{font-size:20px;font-weight:700}.sidebar-subtitle,.muted{color:var(--muted)}.sidebar nav{margin-top:16px}.sidebar nav a{display:block;padding:10px 11px;margin-top:7px;border-radius:8px;color:var(--text);text-decoration:none;background:#1a2c39}.sidebar nav a:hover{background:#284253}.sidebar-foot{margin-top:18px;color:var(--muted);font-size:12px;display:flex;gap:7px;align-items:center}.workspace{padding:18px;max-width:1540px;width:100%}.topline,.section-head{display:flex;justify-content:space-between;gap:14px;align-items:center;flex-wrap:wrap}.header-status{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.eyebrow{color:var(--cyan);font-size:12px;letter-spacing:.12em;text-transform:uppercase}.status,.sync-state,.poll-chip,.gas-status{padding:8px 12px;border-radius:999px;font-weight:700;font-size:13px}.sync-state,.poll-chip{background:#203744;color:#b9deef}.poll-chip{display:flex;gap:7px;align-items:center}.normal{background:rgba(53,199,121,.17);color:var(--green)}.warning{background:rgba(242,201,76,.17);color:var(--yellow)}.high{background:rgba(242,153,74,.17);color:var(--orange)}.danger{background:rgba(235,87,87,.17);color:var(--red)}.fault{background:rgba(187,107,217,.17);color:var(--purple)}.live-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(53,199,121,.12);display:inline-block}.summary-grid,.gauge-grid,.health-grid,.modbus-summary-grid{display:grid;gap:12px}.summary-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin:14px 0}.summary-card,.card,.gauge-card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px}.summary-label,.gas-caption,.gauge-unit,.gauge-pct,.summary-meta{color:var(--muted);font-size:13px}.summary-value{font-weight:700;margin:5px 0}.section-block{margin:16px 0}.gauge-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:14px}.gauge-heading,.gauge-details,.stat-row,.health-grid>div,.modbus-summary-grid>div{display:flex;justify-content:space-between;gap:10px}.gas-name{font-size:21px;font-weight:700}.gas-status{padding:6px 9px;font-size:11px}.gauge-wrap{position:relative;width:180px;height:180px;margin:6px auto 4px}.gauge-svg{width:180px;height:180px;transform:rotate(-90deg)}.gauge-track,.gauge-progress{fill:none;stroke-width:15}.gauge-track{stroke:#2a414f}.gauge-progress{stroke:var(--cyan);stroke-linecap:round;stroke-dasharray:427.26;transition:stroke-dashoffset .45s ease,stroke .3s ease}.gauge-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.gauge-value{font-size:31px;font-weight:700}.gauge-details{flex-direction:column;margin-top:4px}.gauge-details>div,.health-grid>div,.modbus-summary-grid>div{display:flex;justify-content:space-between;gap:10px}.gauge-details span,.stat-row,.health-grid span,.modbus-summary-grid span{color:var(--muted);font-size:12px}.mini-bar{height:9px;background:#304856;border-radius:8px;overflow:hidden;margin:11px 0}.mini-bar span{display:block;height:100%;background:var(--blue);transition:width .45s ease}.stat-row{display:flex;justify-content:space-between;gap:8px}.section-head h2,.topline h1{margin:3px 0}.card{margin:14px 0}.legend{display:flex;gap:16px;color:var(--muted);font-size:13px;margin-top:8px}.legend-so2{color:#4fc3f7}.legend-nox{color:#f6c453}.legend-co{color:#ef6b73}canvas{width:100%;background:#101c26;border-radius:9px}.health-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.health-grid>div,.modbus-summary-grid>div{background:#1c3040;border-radius:8px;padding:11px}.modbus-summary-grid{grid-template-columns:repeat(4,minmax(0,1fr));margin:12px 0}.btn{display:inline-block;padding:10px 13px;border:0;border-radius:8px;background:var(--blue);color:white;text-decoration:none;cursor:pointer;margin:4px 6px 4px 0}.btn.secondary{background:#314957}.footer{color:var(--muted);font-size:13px;margin:18px 0}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{padding:9px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.modbus-table th{color:#b9deef;background:#1c3040}.modbus-table td{font-variant-numeric:tabular-nums}.auth-body{display:grid;place-items:center;min-height:100vh}.auth-card{width:min(440px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}.auth-card input{display:block;width:100%;padding:11px;border-radius:8px;border:1px solid var(--line);background:#0f1d27;color:var(--text);margin:6px 0 12px}.alert{padding:10px;border-radius:8px}@media(max-width:1180px){.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gauge-grid{grid-template-columns:1fr}.gauge-card{max-width:700px}.modbus-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.app-shell{grid-template-columns:1fr}.sidebar{height:auto;position:static}.summary-grid,.health-grid,.modbus-summary-grid{grid-template-columns:1fr}.workspace{padding:13px}.gauge-wrap{width:168px;height:168px}.gauge-svg{width:168px;height:168px}}
/* V5 stable matched HMI refinement */
.modbus-table tbody tr{
  transition:background-color .35s ease,box-shadow .35s ease
}
.modbus-table tbody tr.register-updated{
  background:rgba(101,211,255,.11);
  box-shadow:inset 3px 0 0 rgba(101,211,255,.8)
}
.modbus-table tbody tr.register-steady{
  background:transparent
}
.gauge-card{overflow:hidden}
.gas-name{letter-spacing:.04em}
.gauge-center .gauge-value{font-variant-numeric:tabular-nums}

/* V7 verified edge synchronization */
.sync-state.offline{background:rgba(235,87,87,.17);color:var(--red)}
.sync-state.waiting{background:rgba(242,201,76,.17);color:var(--yellow)}

.operator-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0}.operator-strip>div{background:#152936;border:1px solid var(--line);border-radius:10px;padding:11px;display:flex;flex-direction:column;gap:5px}.strip-label{color:var(--muted);font-size:11px;letter-spacing:.12em}.operator-strip strong{color:#d9f3ff;font-size:14px}.gauge-card,.summary-card{background:linear-gradient(180deg,#172a38,#14232f)}.gauge-heading{border-bottom:1px solid rgba(101,211,255,.14);padding-bottom:7px}#diag-sequence{font-size:12px;overflow-wrap:anywhere}@media(max-width:900px){.operator-strip{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.operator-strip{grid-template-columns:1fr}}

/* V8 matched operator HMI: stable five-second cadence */
.workspace{overflow-x:hidden}
.operator-strip{grid-template-columns:repeat(5,minmax(0,1fr))}
.section-block{scroll-margin-top:16px}
.gauge-card{
  min-height:420px;
  overflow:hidden;
  contain:layout paint;
  transition:border-color .35s ease,box-shadow .35s ease
}
.gauge-card.sample-updated{
  border-color:rgba(101,211,255,.7);
  box-shadow:0 0 0 1px rgba(101,211,255,.16),0 0 20px rgba(101,211,255,.10)
}
.gauge-details>div,.stat-row{
  min-width:0
}
.gauge-details strong,.stat-row strong{
  font-variant-numeric:tabular-nums;
  white-space:nowrap
}
.action-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
  margin-top:14px
}
.action-grid>div{
  min-width:0;
  background:#1c3040;
  border:1px solid var(--line);
  border-radius:9px;
  padding:12px;
  display:flex;
  flex-direction:column;
  gap:6px
}
.action-grid strong{
  color:#d9f3ff;
  font-size:13px;
  letter-spacing:.05em
}
.action-grid span{
  color:var(--muted);
  font-size:12px
}
.section-actions{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-top:12px
}
.modbus-table th,.modbus-table td{
  white-space:nowrap
}
@media(max-width:1200px){
  .operator-strip{grid-template-columns:repeat(3,minmax(0,1fr))}
  .action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
  .operator-strip,.action-grid{grid-template-columns:1fr}
  .gauge-card{min-height:auto}
}

/* V9 dual-device operator hierarchy */
.priority-grid,.device-grid{display:grid;gap:12px}
.priority-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:14px}
.device-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:14px}
.priority-card,.device-card{
  min-width:0;
  background:linear-gradient(180deg,#1b3140,#162835);
  border:1px solid var(--line);
  border-radius:11px;
  padding:13px
}
.priority-head,.device-card-head,.device-kv{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px
}
.priority-value{font-size:25px;font-weight:700;margin:11px 0 4px;font-variant-numeric:tabular-nums}
.priority-value small,.priority-meta,.device-index{font-size:12px;color:var(--muted)}
.activity-pill{font-size:11px;color:var(--cyan);background:rgba(101,211,255,.10);padding:4px 7px;border-radius:999px}
.monitor-check{color:var(--green);font-weight:700}
.monitor-empty{color:var(--muted)}
.device-card{cursor:pointer;transition:border-color .25s ease,box-shadow .25s ease}
.device-card.selected{border-color:rgba(101,211,255,.75);box-shadow:0 0 0 1px rgba(101,211,255,.14),0 0 20px rgba(101,211,255,.08)}
.device-card h3{margin:2px 0 9px}
.device-kv{border-top:1px solid rgba(101,211,255,.10);padding:7px 0;font-size:13px}
.device-kv span{color:var(--muted)}
.device-tabbar{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.device-tab{border:1px solid var(--line);background:#203342;color:var(--text);padding:10px 13px;border-radius:8px;cursor:pointer;font-weight:700}
.device-tab.active{background:#28506a;border-color:rgba(101,211,255,.75)}
@media(max-width:1100px){
  .priority-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
  .priority-grid,.device-grid{grid-template-columns:1fr}
}

/* V10 configurable device manager and calmer UI */
.manager-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px}
.manager-card{min-width:0}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px}
.form-grid label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:12px}
.form-grid input{min-width:0;background:#10212c;color:var(--text);border:1px solid var(--line);border-radius:7px;padding:10px}
.toggle-line{display:flex;align-items:center;gap:7px;color:var(--text);font-weight:700}
.device-card .device-actions{margin-top:10px}
.operator-strip{grid-template-columns:repeat(5,minmax(0,1fr))}
@media(max-width:1000px){.manager-grid{grid-template-columns:1fr}}
@media(max-width:560px){.form-grid{grid-template-columns:1fr}}

/* V10.2 visibility-first polish */
.workspace{max-width:1680px;padding:16px 18px 28px}
.section-block{border-radius:13px}
.section-head{align-items:flex-start}
.section-head>div{min-width:0}
.section-head h2{line-height:1.2}
.operator-strip>div,.summary-card,.gauge-card,.priority-card,.device-card{
  min-width:0;
  overflow:hidden
}
.gauge-grid{align-items:stretch}
.gauge-heading{min-width:0}
.gauge-heading>div{min-width:0}
.gas-name,.priority-head strong,.device-card h3{
  overflow-wrap:anywhere
}
.table-wrap{
  border:1px solid var(--line);
  border-radius:10px;
  max-height:520px;
  overflow:auto
}
.modbus-table thead{
  position:sticky;
  top:0;
  z-index:2
}
.modbus-table th{
  background:#1c3040
}
.device-tabbar{
  position:sticky;
  top:0;
  z-index:3;
  background:var(--panel);
  padding:8px 0
}
.sidebar nav a{
  border:1px solid transparent
}
.sidebar nav a:hover{
  border-color:rgba(101,211,255,.5)
}
.manager-card{
  overflow:hidden
}
@media(max-width:1180px){
  .workspace{padding:14px}
}

/* V11 continuous trend and report center */
.trend-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end;background:#172a38;border:1px solid var(--line);border-radius:10px;padding:12px;margin:12px 0}
.trend-controls label,.trend-controls fieldset{display:flex;gap:8px;align-items:center}.trend-controls fieldset{border:1px solid var(--line);border-radius:8px;padding:8px 10px}.trend-controls legend{color:var(--muted);font-size:11px;padding:0 5px}.trend-controls select{min-width:120px}.trend-meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px;margin-bottom:8px;overflow-wrap:anywhere}
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:10px 0 16px}.check-card{display:flex;gap:9px;align-items:flex-start;background:#1c3040;border:1px solid var(--line);border-radius:9px;padding:11px}.check-card span{display:flex;flex-direction:column;gap:3px}.check-card small{color:var(--muted)}
.report-frame{width:100%;min-height:640px;border:1px solid var(--line);border-radius:9px;background:#fff}.report-print{background:#fff;color:#1f2933}.report-print table{width:100%;border-collapse:collapse}.report-print th,.report-print td{border:1px solid #c7d1d8;padding:7px;text-align:left}.report-print h2,.report-print h3{color:#1f2933}
@media(max-width:900px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:620px){.check-grid{grid-template-columns:1fr}.trend-controls{display:grid}}

/* V12 report image and table refinement */
#trend-image-link{display:inline-flex;align-items:center}
.modbus-table td:nth-child(3),.modbus-table th:nth-child(3){font-variant-numeric:tabular-nums;white-space:nowrap}
.report-print img{max-width:100%;height:auto}

/* V13 operator workflow */
.check-card input:checked+span{border-color:rgba(101,211,255,.7)}
.modbus-table input{max-width:105px;background:#132430;color:var(--text);border:1px solid var(--line);border-radius:5px;padding:5px}
.priority-pill{display:inline-flex;align-items:center;padding:4px 8px;border-radius:999px;font-weight:700;font-size:11px}
.priority-pill.active{background:rgba(53,199,121,.16);color:var(--green)}
.priority-pill.idle{background:rgba(168,182,196,.12);color:var(--muted)}

/* V14 consolidated operator polish */
.nav-group{display:block;margin:12px 7px 5px;color:var(--muted);font-size:10px;letter-spacing:.14em}
.sidebar nav{max-height:calc(100vh - 170px);overflow:auto;padding-right:3px}
.sidebar nav a{padding:8px 10px}
#active-alarm-body td{white-space:nowrap}
.status.danger{background:rgba(235,87,87,.18);color:#ff9b9b}
.status.warning{background:rgba(242,201,76,.18);color:#f2c94c}
.device-card .device-kv strong{font-variant-numeric:tabular-nums}
.trend-meta{font-size:12px;color:var(--muted)}