:root{
  --ink:#16262f;--muted:#5f6f76;--bg:#f2f4f3;--card:#fff;--line:#dbe2e0;--nav:#0f1d26;--nav-ink:#b9c8cd;--nav-active:#22394a;
  --accent:#1d6fa5;--accent-ink:#fff;--accent-soft:#e7f0f7;--gold:#d2a24c;
  --ok:#25744f;--ok-soft:#e5f3eb;--soon:#8a5f12;--soon-soft:#f8eed7;--bad:#a8332c;--bad-soft:#f9e4e2;--gray-soft:#eef1f2;
  --radius:10px;--shadow:0 1px 2px rgba(15,29,38,.06);
}
@media (prefers-color-scheme:dark){:root{
  --ink:#e4ecef;--muted:#9aaab0;--bg:#0d161c;--card:#15212a;--line:#24343f;--nav:#081015;--nav-active:#1c3142;
  --accent:#4a9ad3;--accent-soft:#13283a;--ok:#5cc28e;--ok-soft:#12291f;--soon:#e0b357;--soon-soft:#2c2412;--bad:#f07a70;--bad-soft:#331816;--gray-soft:#1b2830;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--accent)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.hidden{display:none!important}

/* shell */
.sidebar{position:fixed;inset:0 auto 0 0;width:220px;background:var(--nav);color:#eef4f6;padding:24px 16px;display:flex;flex-direction:column;gap:18px;z-index:20}
.brand{display:flex;gap:10px;align-items:center;color:inherit;text-decoration:none}
.brand img{width:36px;height:36px}
.brand b{display:block;font-size:18px;letter-spacing:2px}
.brand small{display:block;font-size:10px;letter-spacing:1.5px;color:#8fa5ad}
#nav{display:flex;flex-direction:column;gap:3px}
#nav a{display:flex;gap:10px;align-items:center;padding:9px 11px;border-radius:7px;color:var(--nav-ink);text-decoration:none;font-size:14px}
#nav a:hover{background:#1a2c37}
#nav a.active{background:var(--nav-active);color:#fff}
#nav a .i{width:18px;text-align:center;color:#7fa0ad}
#nav a.active .i{color:var(--gold)}
.side-foot{margin-top:auto;font-size:12px;color:#8fa5ad}
.side-foot b{color:#dfe8eb;font-weight:600}
.workspace{margin-left:220px;min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:12px;padding:14px 28px;border-bottom:1px solid var(--line);background:var(--card)}
.topbar h1{font-size:19px;margin:0;font-weight:650;letter-spacing:-.3px;flex:1}
#menu-btn{display:none}
main{padding:24px 28px 40px;max-width:1200px;width:100%}
.footer{margin-top:auto;padding:14px 28px;font-size:12px;color:var(--muted)}

/* building blocks */
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);min-width:0}
.card h2{font-size:16px;margin:0 0 10px}
.card h3{font-size:14px;margin:14px 0 6px}
.stack>*+*{margin-top:16px}
.metric .label{font-size:12px;color:var(--muted)}
.metric .value{font-size:28px;font-weight:650;letter-spacing:-.8px;line-height:1.25}
.metric .foot{font-size:12px;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:12px}
.notice{background:var(--accent-soft);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:13px}
.warn{background:var(--soon-soft);color:var(--soon);border-radius:8px;padding:10px 12px;font-size:14px}
.error{background:var(--bad-soft);color:var(--bad);border-radius:8px;padding:10px 12px;font-size:14px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spread{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.pill{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.4px;padding:3px 8px;border-radius:5px;background:var(--gray-soft);color:var(--muted);white-space:nowrap;text-transform:uppercase}
.pill.ok{background:var(--ok-soft);color:var(--ok)}
.pill.soon,.pill.caution,.pill.deferred{background:var(--soon-soft);color:var(--soon)}
.pill.overdue,.pill.grounding{background:var(--bad-soft);color:var(--bad)}
.pill.open,.pill.on{background:var(--accent-soft);color:var(--accent)}

.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--card);border-radius:8px;padding:9px 14px;font-weight:600;font-size:14px;text-decoration:none;color:var(--ink);cursor:pointer;min-height:40px}
.button:hover{filter:brightness(.97)}
.button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.button.danger{color:var(--bad)}
.button.big{min-height:52px;font-size:16px;padding:12px 18px}
.button:disabled{opacity:.55;cursor:default}

/* tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;color:var(--muted);font-weight:600;white-space:nowrap}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.clickable{cursor:pointer}
tr.clickable:hover td{background:var(--gray-soft)}

/* forms */
form .fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 14px}
form .full{grid-column:1/-1}
label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:600}
label .hint{font-weight:400;color:var(--muted);font-size:12px}
input,select,textarea{border:1px solid var(--line);border-radius:8px;padding:10px 11px;background:var(--card);min-height:44px;width:100%}
textarea{min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg label{flex:1;flex-direction:row;justify-content:center;align-items:center;padding:0;font-weight:500;cursor:pointer}
.seg input{position:absolute;opacity:0;width:1px;height:1px;min-height:0}
.seg span{flex:1;text-align:center;padding:9px 6px}
.seg input:checked+span{background:var(--accent);color:var(--accent-ink)}
.seg input:focus-visible+span{outline:3px solid var(--gold);outline-offset:-3px}
.pair{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:end}
fieldset{border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin:0}
legend{font-size:13px;font-weight:600;padding:0 4px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

/* hangar */
.heater{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.heater:last-child{border-bottom:0}
.temp{font-size:26px;font-weight:650}

/* sign-in */
.login-page{display:flex;min-height:100vh;align-items:center;justify-content:center;padding:16px}
.login-card{width:100%;max-width:380px}
.login-card .brand{color:var(--ink);margin-bottom:18px}
.login-card .brand small{color:var(--muted)}

#toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--nav);color:#fff;padding:10px 16px;border-radius:8px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:50;max-width:calc(100% - 32px)}
#toast.show{opacity:1}

@media (max-width:900px){
  .g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .sidebar{transform:translateX(-100%);transition:transform .2s;width:240px}
  body.nav-open .sidebar{transform:none;box-shadow:0 0 0 100vmax rgba(0,0,0,.35)}
  .workspace{margin-left:0}
  #menu-btn{display:inline-flex}
  .topbar{padding:10px 16px;position:sticky;top:0;z-index:10}
  main{padding:16px 16px 32px}
  .footer{padding:12px 16px}
  .g2,.g3{grid-template-columns:minmax(0,1fr)}
  .g4{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .metric .value{font-size:22px}
  form .fields{grid-template-columns:minmax(0,1fr)}
  .hide-sm{display:none}
  th,td{padding:7px 6px}
  table.cards-sm thead{display:none}
  table.cards-sm tr{display:block;border-bottom:1px solid var(--line);padding:8px 0}
  table.cards-sm td{display:block;border:0;padding:2px 0}
}
@media print{.sidebar,.topbar,.actions,#toast{display:none!important}.workspace{margin:0}}