:root{
  --carbon:#050706; --graphite:#0B100E; --panel:#080C0A; --slate:#121815;
  --line:rgba(245,246,242,.09); --line-soft:rgba(245,246,242,.05);
  --white:#F5F6F2; --muted:#79877D; --muted2:#525C56; --signal:#C9F26E;
  --none:#79877D; --low:#8FA88C; --medium:#E3C55C; --high:#E08A4B; --critical:#E0705F;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--carbon);color:var(--white)}
body{font-family:var(--sans);font-size:13px;-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--signal);color:#0A0C0A}

#app{display:grid;grid-template-rows:44px 1fr 74px;grid-template-columns:238px 1fr 258px;height:100%}
header{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:0 16px;border-bottom:1px solid var(--line);background:var(--panel)}
.brand{display:flex;align-items:center;gap:10px}
.brand svg{width:19px;height:19px}
.brand b{font-family:var(--sans);font-weight:600;letter-spacing:.34em;font-size:.86rem}
.hdr-mid{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hdr-right{display:flex;align-items:center;gap:14px}
.tag{font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted2)}
#riskBadge{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;border:1px solid var(--line);
  border-radius:999px;padding:5px 11px;color:var(--muted)}
#clock{font-family:var(--mono);font-size:.72rem;color:var(--muted);letter-spacing:.1em}

aside{background:var(--panel);overflow-y:auto;overflow-x:hidden}
aside.left{border-right:1px solid var(--line)}
aside.right{border-left:1px solid var(--line)}
.block{padding:13px 14px;border-bottom:1px solid var(--line-soft)}
.block h3{margin:0 0 10px;font-family:var(--mono);font-size:.58rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted2);font-weight:400}
.rows .row{display:flex;justify-content:space-between;gap:10px;padding:3px 0;
  font-family:var(--mono);font-size:.68rem}
.rows .k{color:var(--muted2)}
.rows .v{color:var(--white);text-align:right}

main{position:relative;background:var(--carbon);min-width:0}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
#scene{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab}
#scene:active{cursor:grabbing}
.overlay-tl{position:absolute;left:14px;top:12px;pointer-events:none}
.overlay-tl .mode{font-family:var(--mono);font-size:.58rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted2)}
.overlay-bl{position:absolute;left:14px;bottom:12px;font-family:var(--mono);font-size:.58rem;
  letter-spacing:.14em;color:var(--muted2);pointer-events:none;line-height:1.9}
.legend i{display:inline-block;width:7px;height:7px;margin-right:6px;vertical-align:middle}

.seg{display:inline-flex;border:1px solid var(--line);border-radius:4px;overflow:hidden}
.seg button{font-family:var(--mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 9px;color:var(--muted);border-right:1px solid var(--line-soft);transition:background .2s,color .2s}
.seg button:last-child{border-right:0}
.seg button:hover{color:var(--white);background:rgba(245,246,242,.04)}
.seg button.on{background:rgba(201,242,110,.14);color:var(--signal)}

.chk{display:flex;align-items:center;gap:8px;padding:3px 0;font-family:var(--mono);
  font-size:.63rem;color:var(--muted);cursor:pointer;user-select:none}
.chk input{appearance:none;-webkit-appearance:none;width:11px;height:11px;border:1px solid var(--line);
  border-radius:2px;position:relative;flex:none;cursor:pointer}
.chk input:checked{background:var(--signal);border-color:var(--signal)}
.chk:hover{color:var(--white)}

.srow{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:3px 0;
  font-family:var(--mono);font-size:.62rem}
.sid{color:var(--muted)}
.sstate{font-size:.55rem;letter-spacing:.1em;padding:2px 6px;border-radius:3px;
  border:1px solid var(--line-soft);color:var(--muted2)}
.sstate.active{color:var(--signal);border-color:rgba(201,242,110,.3)}
.sstate.degraded{color:var(--medium);border-color:rgba(227,197,92,.35)}
.sstate.offline{color:var(--critical);border-color:rgba(224,112,95,.35)}

footer{grid-column:1/-1;border-top:1px solid var(--line);background:var(--panel);
  display:flex;align-items:center;gap:16px;padding:0 16px;overflow:hidden}
#alerts{display:flex;flex-direction:column;gap:3px;flex:1;min-width:0;padding:8px 0}
.alert{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.65rem;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.alert .lvl{font-size:.55rem;letter-spacing:.14em;padding:2px 7px;border-radius:3px;flex:none;
  border:1px solid currentColor}
.alert .txt{color:var(--muted)}
.alert.none .lvl{color:var(--none)} .alert.low .lvl{color:var(--low)}
.alert.medium .lvl{color:var(--medium)} .alert.high .lvl{color:var(--high)}
.alert.critical .lvl{color:var(--critical)}
.alert.critical .txt,.alert.high .txt{color:var(--white)}
.controls{display:flex;align-items:center;gap:10px;flex:none}
#playPause,#reset{font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;
  border:1px solid var(--line);border-radius:4px;padding:7px 13px;color:var(--muted);transition:.2s}
#playPause.on{color:var(--signal);border-color:rgba(201,242,110,.35)}
#reset:hover,#playPause:hover{color:var(--white)}

#inspector{position:absolute;right:14px;top:56px;width:224px;background:rgba(8,12,10,.93);
  border:1px solid var(--line);border-radius:5px;backdrop-filter:blur(9px);
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:.24s;z-index:5}
#inspector.open{opacity:1;visibility:visible;transform:none}
.insp-head{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;
  border-bottom:1px solid var(--line-soft)}
#inspTitle{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;color:var(--signal)}
#inspectorClose{font-family:var(--mono);font-size:.7rem;color:var(--muted2);padding:0 3px}
#inspectorClose:hover{color:var(--white)}
.insp-body{padding:10px 12px;max-height:52vh;overflow-y:auto}
#inspSources{display:flex;flex-wrap:wrap;gap:4px;margin-top:9px}
.src{font-family:var(--mono);font-size:.53rem;letter-spacing:.08em;padding:2px 6px;
  border:1px solid var(--line-soft);border-radius:3px;color:var(--muted2)}

#bootError{display:none;position:absolute;inset:0;margin:auto;height:fit-content;width:fit-content;
  font-family:var(--mono);font-size:.8rem;color:var(--critical);padding:20px}
::-webkit-scrollbar{width:7px;height:7px}
::-webkit-scrollbar-thumb{background:rgba(245,246,242,.09);border-radius:4px}
::-webkit-scrollbar-track{background:transparent}

@media (max-width:1100px){
  #app{grid-template-columns:200px 1fr 210px}
}

a.brand{color:inherit;text-decoration:none}
.mobile-panels{display:none}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
@media(max-width:1300px){.brand .tag{display:none}}
@media(max-width:900px){
  html,body{height:auto;min-height:100%;overflow:auto}
  #app{height:auto;min-height:100svh;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto minmax(380px,60svh) auto auto auto;grid-template-areas:'header' 'tabs' 'scene' 'controls' 'vessel' 'sensors'}
  header{grid-area:header;display:grid;grid-template-columns:1fr auto;gap:14px;padding:16px 12px}
  .hdr-right{grid-column:2;grid-row:1;gap:8px}
  .hdr-mid{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:8px;min-width:0}
  #scenarios{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
  .hdr-mid .seg{display:flex;min-width:0}
  .hdr-mid #scenarios{display:grid}
  .hdr-mid .seg button{flex:1;min-width:0;padding:8px 5px;font-size:.53rem;letter-spacing:.04em;min-height:40px}
  .mobile-panels{grid-area:tabs;display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line);padding:0 12px 10px;gap:8px;background:var(--panel)}
  .mobile-panels button{min-height:44px;border:1px solid var(--line);border-radius:4px;font-family:var(--mono);font-size:.6rem;color:var(--muted)}
  .mobile-panels button[aria-expanded=true]{color:var(--signal);border-color:var(--signal)}
  main{grid-area:scene;min-height:380px}
  #scene{touch-action:none}
  aside.left{grid-area:vessel}
  aside.right{grid-area:sensors}
  aside.left,aside.right{display:none;border:0;max-height:70svh;border-top:1px solid var(--line)}
  aside.mobile-open{display:block}
  .block{padding:20px 16px}
  .block h3{font-size:.65rem;color:var(--muted)}
  .chk{min-height:40px;font-size:.75rem}
  .chk input{width:18px;height:18px}
  #camModes{display:flex}
  #camModes button{flex:1;min-height:44px}
  footer{grid-area:controls;display:flex;flex-direction:column;align-items:stretch;gap:8px;padding:12px}
  .controls{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  #speeds{grid-column:1/-1;display:flex}
  #speeds button{flex:1;min-height:44px}
  #playPause,#reset{min-height:44px}
  #alerts{padding:0}
  .alert{white-space:normal;align-items:flex-start;line-height:1.5;font-size:.6rem}
  .alert .txt{overflow-wrap:anywhere}
  .overlay-tl .mode{font-size:.5rem;letter-spacing:.1em}
  .overlay-bl{font-size:.5rem;letter-spacing:.06em;line-height:1.7}
  #inspector{max-width:calc(100% - 24px);right:12px;top:40px}
  #inspectorClose{min-height:36px;min-width:36px}
}