/* Overhaul — "Trend monitor": engine-condition-monitoring software. White, hairlines, Geist.
   One signal blue for anything the model says; red only for engines that need pulling. */

:root {
  --bg: #ffffff;
  --bg-2: #fbfbfc;
  --bg-3: #f3f4f6;
  --ink: #0e1116;
  --ink-2: #374151;
  --muted: #6b7280;
  --faint: #9ca3af;
  --line: #e7e9ec;
  --line-2: #f1f2f4;
  --model: #1f5eff;
  --model-soft: rgba(31, 94, 255, 0.14);
  --model-bg: #f3f6ff;
  --alert: #d92d20;
  --alert-bg: #fdecea;
  --watch: #b54708;
  --watch-bg: #fef4e6;
  --ok: #067647;
  --sans: "Geist", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, monospace;
  --r: 8px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.45 var(--sans); }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
svg { display: block; }
.mono, .num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

/* ------------------------------------------------------------------ top bar */
.bar {
  position: sticky; top: 0; z-index: 30; height: 52px;
  display: flex; align-items: center; gap: 22px; padding: 0 18px;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; text-decoration: none; }
.logo i { width: 15px; height: 15px; border: 2px solid var(--ink); border-radius: 50%; position: relative; }
.logo i::after { content: ""; position: absolute; inset: 3px; background: var(--model); border-radius: 50%; }
.logo small { font: 400 11.5px var(--mono); color: var(--muted); margin-left: 4px; }
.nav { display: flex; gap: 2px; }
.nav a { text-decoration: none; padding: 5px 10px; border-radius: 6px; color: var(--muted); font-weight: 500; font-size: 13.5px; }
.nav a:hover { background: var(--bg-3); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--bg-3); }
.clock { margin-left: auto; display: flex; align-items: center; gap: 14px; font: 400 12px var(--mono); color: var(--muted); }
.clock b { color: var(--ink); font-weight: 500; }
.clock .tick { width: 54px; height: 3px; background: var(--line); border-radius: 2px; overflow: hidden; }
.clock .tick i { display: block; height: 100%; background: var(--model); transition: width 1s linear; }
.ff { display: flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.ff button { border: 0; background: var(--bg); padding: 4px 9px; font: 500 12px var(--mono); color: var(--ink-2); }
.ff button + button { border-left: 1px solid var(--line); }
.ff button:hover { background: var(--bg-3); }
.ff button:disabled { color: var(--faint); cursor: wait; }

/* ------------------------------------------------------------------ shared bits */
.btn {
  display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--ink); background: var(--ink); color: #fff;
  font: 500 12.5px var(--sans); padding: 7px 12px; border-radius: 6px; text-decoration: none;
}
.btn:hover { background: #262b33; }
.btn.ghost { background: var(--bg); color: var(--ink); border-color: #d1d5db; }
.btn.ghost:hover { background: var(--bg-3); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.small { padding: 4px 9px; font-size: 12px; }
select.pick { border: 1px solid #d1d5db; border-radius: 6px; padding: 6px 8px; background: var(--bg); font-size: 12.5px; }
.card { border: 1px solid var(--line); border-radius: var(--r); padding: 12px 14px; background: var(--bg); min-width: 0; }
.card h4 { margin: 0 0 6px; font: 500 12px var(--sans); color: var(--ink-2); display: flex; justify-content: space-between; gap: 10px; }
.card h4 span { font: 400 11px var(--mono); color: var(--faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tiny { font: 400 11px/1.5 var(--mono); color: var(--muted); }
.pill { display: inline-block; font: 500 12px var(--sans); padding: 3px 8px; border-radius: 4px; white-space: nowrap; }
.pill.pull, .pill.aog { color: var(--alert); background: var(--alert-bg); }
.pill.watch { color: var(--watch); background: var(--watch-bg); }
.pill.ok { color: var(--ok); background: #ecfdf3; }
.pill.booked { color: var(--model); background: var(--model-bg); }
.h-sec { margin: 0; font: 600 13px var(--sans); }
.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 50;
  background: var(--ink); color: #fff; padding: 9px 14px; border-radius: 8px; font-size: 13px; box-shadow: 0 8px 24px rgba(0,0,0,.18);
}
.toast.bad { background: var(--alert); }

/* ------------------------------------------------------------------ fleet page: list | engine | why */
.fleet { display: grid; grid-template-columns: 290px minmax(0, 1fr) 310px; min-height: calc(100vh - 52px); }
.list { border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.lhead { padding: 14px 16px 12px; border-bottom: 1px solid var(--line); position: sticky; top: 52px; background: var(--bg); z-index: 2; }
.lsub { font: 400 11.5px var(--mono); color: var(--muted); display: flex; justify-content: space-between; }
.seg { display: flex; margin-top: 10px; border: 1px solid var(--line); border-radius: 6px; font-size: 12px; }
.seg button { flex: 1; text-align: center; padding: 5px 0; color: var(--muted); border: 0; background: none; border-radius: 5px; }
.seg button.on { background: var(--ink); color: #fff; }
.item {
  display: grid; grid-template-columns: minmax(0, 1fr) 62px 44px; gap: 8px; align-items: center;
  padding: 9px 16px; border-bottom: 1px solid var(--line-2); font-size: 13px; text-decoration: none; cursor: pointer;
}
.item:hover { background: var(--bg-2); }
.item.sel { background: var(--model-bg); box-shadow: inset 3px 0 0 var(--model); }
.item .id { font-weight: 600; display: flex; align-items: center; gap: 6px; }
.item .id .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--model); }
.item .sm { font: 400 11px var(--mono); color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.item .r { font: 500 13px var(--mono); text-align: right; }
.item .r.pull, .item .r.aog { color: var(--alert); }
.item .r.watch { color: var(--watch); }
.group { padding: 10px 16px 4px; font: 500 11px var(--mono); color: var(--faint); text-transform: uppercase; letter-spacing: .06em; }

.main { padding: 20px 26px 30px; min-width: 0; }
.crumb { font: 400 12px var(--mono); color: var(--muted); }
.main h2 { font: 600 26px/1.15 var(--sans); letter-spacing: -0.02em; margin: 6px 0 2px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.facts { display: flex; gap: 28px; margin: 14px 0 14px; flex-wrap: wrap; }
.facts div { font-size: 12px; color: var(--muted); }
.facts b { display: block; font: 500 22px var(--mono); color: var(--ink); letter-spacing: -0.02em; }
.grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin-top: 10px; }
.legend { display: flex; gap: 14px; font: 400 11px var(--mono); color: var(--muted); flex-wrap: wrap; }
.legend i { display: inline-block; width: 14px; height: 0; border-top: 2px solid var(--model); vertical-align: middle; margin-right: 5px; }
.legend i.band { height: 8px; border: 0; background: var(--model-soft); }
.legend i.dash { border-top: 1.5px dashed var(--ink); }
.legend i.red { border-top: 1.5px dashed var(--alert); }

.why-col { border-left: 1px solid var(--line); padding: 20px 18px; display: flex; flex-direction: column; gap: 16px; background: var(--bg-2); }
.why { display: grid; grid-template-columns: minmax(0, 1fr) 84px; gap: 7px 10px; align-items: center; font-size: 12.5px; }
.why .bar { height: 6px; background: #eceef1; border-radius: 3px; overflow: hidden; }
.why .bar i { display: block; height: 100%; background: var(--ink); border-radius: 3px; transition: width .4s; }
.why .dir { color: var(--muted); }
.rec { border: 1px solid var(--ink); border-radius: var(--r); padding: 12px; background: var(--bg); font-size: 13px; }
.rec b { display: block; margin-bottom: 4px; }
.rec .acts { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; align-items: center; }
.rec .acts select { width: 100%; min-width: 0; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; font-size: 12.5px; }
.kv span:nth-child(even) { font-family: var(--mono); text-align: right; }

/* ------------------------------------------------------------------ plan + model pages */
.page { max-width: 1180px; margin: 0 auto; padding: 24px 22px 60px; }
.page h1 { font: 600 28px/1.15 var(--sans); letter-spacing: -0.02em; margin: 0 0 6px; }
.lede { color: var(--ink-2); max-width: 70ch; margin: 0 0 18px; }
.stats { display: flex; gap: 34px; flex-wrap: wrap; padding: 14px 0 18px; border-bottom: 1px solid var(--line); margin-bottom: 20px; }
.stats div { font-size: 12px; color: var(--muted); }
.stats b { display: block; font: 500 24px var(--mono); color: var(--ink); letter-spacing: -0.02em; }
.stats b.bad { color: var(--alert); }
.cols { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.stack { display: grid; gap: 20px; }
table.t { width: 100%; border-collapse: collapse; font-size: 13px; }
table.t th { text-align: left; font: 500 11.5px var(--sans); color: var(--muted); padding: 0 8px 7px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.t td { padding: 8px; border-bottom: 1px solid var(--line-2); vertical-align: middle; }
table.t td.n { font-family: var(--mono); font-variant-numeric: tabular-nums; }
table.t tr.past td { color: var(--faint); }
.empty { color: var(--muted); font-size: 13px; padding: 14px 0; }
.slider { display: flex; align-items: center; gap: 10px; margin: 10px 0 4px; }
.slider input[type="range"] { flex: 1; accent-color: var(--model); }
.switch { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.switch input { accent-color: var(--model); width: 16px; height: 16px; }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin: 6px 0 20px; }
.metric { border: 1px solid var(--line); border-radius: var(--r); padding: 12px 14px; }
.metric b { display: block; font: 500 24px var(--mono); letter-spacing: -0.02em; }
.metric span { font-size: 12px; color: var(--muted); }
.metric.hi { border-color: var(--model); background: var(--model-bg); }
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: var(--r); margin: 0 0 22px; }
.steps div { padding: 12px 14px; font-size: 12.5px; color: var(--ink-2); }
.steps div + div { border-left: 1px solid var(--line); }
.steps b { display: block; font: 500 11px var(--mono); color: var(--muted); margin-bottom: 4px; }
.prose { font-size: 13.5px; color: var(--ink-2); max-width: 72ch; }
.prose li { margin: 4px 0; }

/* ------------------------------------------------------------------ small screens */
@media (max-width: 1180px) {
  .fleet { grid-template-columns: 250px minmax(0, 1fr); }
  .why-col { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
}
@media (max-width: 900px) {
  .bar { position: static; height: auto; flex-wrap: wrap; padding: 10px 16px; gap: 10px 16px; }
  .clock { margin-left: 0; width: 100%; justify-content: space-between; flex-wrap: wrap; }
  .lhead { top: 0; position: static; }
  .fleet { grid-template-columns: 1fr; }
  .list { border-right: 0; border-bottom: 1px solid var(--line); max-height: 330px; overflow-y: auto; }
  .main { padding: 18px 16px; }
  .why-col { padding: 18px 16px; }
  .grid4, .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cols { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .steps div:nth-child(3) { border-left: 0; }
  .steps div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .page { padding: 18px 16px 50px; }
  .table-wrap { overflow-x: auto; }
}