/* OnTrack architecture site — shared styles (2D/3D engine pages). */
:root{
  --bg:#EDF1F7; --fg:#16233A; --fg-dim:rgba(22,35,58,.62);
  --panel:rgba(255,255,255,.8); --panel-brd:rgba(22,35,58,.12);
  --chip:rgba(22,35,58,.07); --chip-fg:#31435F;
  --accent:#B97A00; --accent-soft:rgba(185,122,0,.14);
  --btn:rgba(255,255,255,.84); --btn-brd:rgba(22,35,58,.16);
  --nav:rgba(244,247,251,.8); --nav-brd:rgba(22,35,58,.1);
  --seg:rgba(22,35,58,.08); --seg-active:#FFFFFF;
  --warn:#C2410C;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#080D17; --fg:#E7ECF5; --fg-dim:rgba(199,211,230,.6);
  --panel:rgba(13,20,34,.84); --panel-brd:rgba(148,166,200,.16);
  --chip:rgba(148,166,200,.12); --chip-fg:#C4D0E4;
  --accent:#F5B841; --accent-soft:rgba(245,184,65,.12);
  --btn:rgba(15,23,40,.86); --btn-brd:rgba(148,166,200,.22);
  --nav:rgba(8,13,23,.72); --nav-brd:rgba(148,166,200,.14);
  --seg:rgba(148,166,200,.14); --seg-active:#26334D;
  --warn:#FB923C;
}}
:root[data-theme="dark"]{
  --bg:#080D17; --fg:#E7ECF5; --fg-dim:rgba(199,211,230,.6);
  --panel:rgba(13,20,34,.84); --panel-brd:rgba(148,166,200,.16);
  --chip:rgba(148,166,200,.12); --chip-fg:#C4D0E4;
  --accent:#F5B841; --accent-soft:rgba(245,184,65,.12);
  --btn:rgba(15,23,40,.86); --btn-brd:rgba(148,166,200,.22);
  --nav:rgba(8,13,23,.72); --nav-brd:rgba(148,166,200,.14);
  --seg:rgba(148,166,200,.14); --seg-active:#26334D;
  --warn:#FB923C;
}
:root[data-theme="light"]{
  --bg:#EDF1F7; --fg:#16233A; --fg-dim:rgba(22,35,58,.62);
  --panel:rgba(255,255,255,.8); --panel-brd:rgba(22,35,58,.12);
  --chip:rgba(22,35,58,.07); --chip-fg:#31435F;
  --accent:#B97A00; --accent-soft:rgba(185,122,0,.14);
  --btn:rgba(255,255,255,.84); --btn-brd:rgba(22,35,58,.16);
  --nav:rgba(244,247,251,.8); --nav-brd:rgba(22,35,58,.1);
  --seg:rgba(22,35,58,.08); --seg-active:#FFFFFF;
  --warn:#C2410C;
}
html,body{height:100%;margin:0;overflow:hidden}
body{
  background:var(--bg); color:var(--fg);
  font-family:-apple-system,"Segoe UI Variable Text","Segoe UI",system-ui,Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:"Cascadia Mono",ui-monospace,"JetBrains Mono",Consolas,monospace}
#stage{position:fixed;inset:0;touch-action:none;cursor:grab;display:block}
#stage.drag{cursor:grabbing}

/* ── top nav ── */
.nav{
  position:fixed;top:0;left:0;right:0;height:52px;z-index:10;
  display:flex;align-items:center;gap:14px;padding:0 18px;
  background:var(--nav);border-bottom:1px solid var(--nav-brd);
  backdrop-filter:blur(16px);
}
.nav .brand{display:flex;align-items:center;gap:9px;font-weight:750;font-size:14px;letter-spacing:-.01em;white-space:nowrap}
.nav .brand .dot{width:10px;height:10px;border-radius:3px;background:var(--accent);flex:0 0 auto}
.nav .brand .n{color:var(--fg-dim);font-weight:500}
.nav .tabs{display:flex;gap:2px;margin:0 auto;overflow-x:auto;scrollbar-width:none}
.nav .tabs::-webkit-scrollbar{display:none}
.nav .tabs a{
  font-size:13px;font-weight:600;color:var(--fg-dim);text-decoration:none;
  padding:7px 13px;border-radius:9px;white-space:nowrap;
}
.nav .tabs a:hover{color:var(--fg);background:var(--chip)}
.nav .tabs a.on{color:var(--fg);background:var(--chip)}
.nav .tabs a:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.seg{display:flex;background:var(--seg);border-radius:10px;padding:3px;gap:2px;flex:0 0 auto}
.seg button{
  font:600 12px -apple-system,"Segoe UI",system-ui,sans-serif;color:var(--fg-dim);
  background:transparent;border:0;border-radius:8px;padding:5px 13px;cursor:pointer;
}
.seg button.on{background:var(--seg-active);color:var(--fg);box-shadow:0 1px 4px rgba(3,8,20,.15)}
.seg button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}

/* ── hud ── */
.hud{position:fixed;top:72px;left:24px;max-width:440px;pointer-events:none;z-index:3}
.hud .eyebrow{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}
.hud h1{margin:0 0 8px;font-size:clamp(19px,3vw,27px);font-weight:750;letter-spacing:-.02em;text-wrap:balance}
.hud .meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.hud .meta span{
  font-family:"Cascadia Mono",ui-monospace,Consolas,monospace;font-size:10.5px;
  padding:3px 8px;border-radius:99px;background:var(--chip);color:var(--chip-fg);
}
.hud .hint{font-size:12px;color:var(--fg-dim)}

/* ── info panel ── */
.panel{
  position:fixed;right:20px;top:72px;width:312px;max-height:calc(100vh - 170px);overflow-y:auto;
  background:var(--panel);border:1px solid var(--panel-brd);border-radius:14px;
  padding:16px 16px 14px;z-index:4;backdrop-filter:blur(14px);
  box-shadow:0 12px 40px rgba(3,8,20,.18);
}
.panel h3{margin:0 0 8px;font-size:15.5px;font-weight:700;letter-spacing:-.01em;display:flex;align-items:center;gap:8px}
.panel h3 .dot{width:10px;height:10px;border-radius:3px;flex:0 0 auto}
.panel .chips{display:flex;flex-wrap:wrap;gap:5px;margin:0 0 10px}
.panel .chips span{
  font-family:"Cascadia Mono",ui-monospace,Consolas,monospace;font-size:10px;
  padding:2.5px 7px;border-radius:6px;background:var(--chip);color:var(--chip-fg);
}
.panel p{margin:0 0 8px;font-size:12.5px;line-height:1.5}
.panel .evrow{display:flex;gap:6px;align-items:baseline;flex-wrap:wrap;margin:2px 0}
.panel .evlbl{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-dim)}
.panel .ev{
  font-family:"Cascadia Mono",ui-monospace,Consolas,monospace;font-size:10px;
  padding:2px 7px;border-radius:6px;background:var(--accent-soft);color:var(--accent);
}
.panel ul{margin:4px 0 6px;padding-left:16px;font-size:12.5px;line-height:1.55}
.panel li{margin:3px 0}
.panel .foot{font-size:11px;color:var(--fg-dim);margin-top:6px}
.panel .warn{color:var(--warn);font-weight:600}
.panel table{width:100%;border-collapse:collapse;font-size:11.5px;margin:4px 0 8px}
.panel td{padding:2.5px 4px;border-bottom:1px solid var(--panel-brd);vertical-align:top}
.panel td:first-child{font-family:"Cascadia Mono",ui-monospace,Consolas,monospace;font-size:10.5px;color:var(--chip-fg);white-space:nowrap}

/* ── legend / controls ── */
.legend{
  position:fixed;left:24px;bottom:16px;z-index:3;display:flex;flex-direction:column;gap:5px;
  font-size:11.5px;color:var(--fg-dim);pointer-events:none;
}
.legend .li{display:flex;align-items:center;gap:8px}
.lg-line{width:26px;height:0;border-top:2px solid currentColor;opacity:.7}
.lg-dash{width:26px;height:0;border-top:2px dashed currentColor;opacity:.7}
.lg-glow{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);margin:0 8px}
.lg-cyl{width:16px;height:11px;border:1.5px solid currentColor;border-radius:50%/38%;opacity:.75;margin:0 5px}
.lg-warn{width:9px;height:9px;border-radius:50%;background:var(--warn);margin:0 8px}
.controls{position:fixed;right:20px;bottom:16px;z-index:4;display:flex;gap:8px}
.controls button{
  font:600 12px -apple-system,"Segoe UI",system-ui,sans-serif;color:var(--fg);
  background:var(--btn);border:1px solid var(--btn-brd);border-radius:10px;
  padding:8px 12px;cursor:pointer;backdrop-filter:blur(10px);
}
.controls button:hover{border-color:var(--accent)}
.controls button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

@media (max-width:820px){
  .nav .brand .n{display:none}
  .hud{max-width:calc(100vw - 48px)}
  .panel{left:12px;right:12px;top:auto;bottom:64px;width:auto;max-height:36vh}
  .legend{display:none}
  .controls{right:12px;bottom:12px}
}

/* ── live status ── */
.livebar{
  position:fixed;top:60px;left:50%;transform:translateX(-50%);z-index:6;
  display:none;align-items:center;gap:8px;max-width:min(680px,90vw);
  font:600 12.5px -apple-system,"Segoe UI",system-ui,sans-serif;color:var(--fg);
  background:var(--accent-soft);border:1px solid var(--accent);border-radius:99px;
  padding:7px 14px;backdrop-filter:blur(10px);
}
.livebar .spin{width:11px;height:11px;border-radius:50%;border:2px solid var(--accent);
  border-top-color:transparent;animation:lvspin 1s linear infinite;flex:0 0 auto}
@keyframes lvspin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion: reduce){.livebar .spin{animation:none}}
.panel .lv{display:flex;flex-wrap:wrap;gap:5px;margin:2px 0 8px}
.panel .lv span{font-family:"Cascadia Mono",ui-monospace,Consolas,monospace;font-size:10px;
  padding:2.5px 7px;border-radius:6px;background:var(--chip);color:var(--chip-fg)}
.panel .lv .ph-ok{background:rgba(52,199,89,.15);color:#2E9E57}
.panel .lv .ph-rolling{background:var(--accent-soft);color:var(--accent)}
.panel .lv .ph-degraded{background:rgba(245,158,11,.15);color:#B45309}
.panel .lv .ph-down{background:rgba(239,68,68,.15);color:#DC2626}
.panel a{color:var(--accent);font-weight:600;text-decoration:none}
.panel a:hover{text-decoration:underline}