:root {
  --bg: #f1f5f9; --ink: #0f172a; --muted: #64748b; --card: #fff; --line: #cbd5e1;
  --accent: #2563eb; --accent2: #0d9488; --warn: #f59e0b; --bad: #ef4444; --good: #22c55e;
  --codebg: #0f172a; --codeink: #e2e8f0;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1220; --ink: #e2e8f0; --muted: #94a3b8; --card: #162033; --line: #334155; --codebg: #060b14; }
}
* { box-sizing: border-box; }
html { overflow-x: hidden; }
body { margin: 0; overflow-x: hidden; font-family: "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--ink); line-height: 1.5; }
header { text-align: center; padding: 18px 16px 6px; }
header h1 { margin: 0; font-size: 2rem; }
header h1 small { font-size: .5em; color: var(--accent2); font-weight: 600; }
header p { margin: 4px 0 0; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; padding: 12px 12px 4px; position: sticky; top: 0; background: var(--bg); z-index: 5; }
nav button { background: var(--card); color: var(--ink); border: 2px solid var(--line); box-shadow: none; }
nav button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
main { max-width: 1100px; margin: 0 auto; padding: 8px 16px 20px; }
h2 { margin: 12px 0 4px; }
.lead { margin: 0 0 12px; font-size: 1.05rem; }
.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.two > *, .three > * { min-width: 0; }
@media (max-width: 800px) { .two { grid-template-columns: minmax(0, 1fr); } }
.card { background: var(--card); border-radius: 16px; padding: 14px 16px; box-shadow: 0 2px 10px rgba(0,0,0,.1); }
.center { text-align: center; }
canvas, svg { max-width: 100%; }
canvas { width: 100%; height: auto; display: block; touch-action: none; }
.row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 10px 0; }
button { font: inherit; font-size: .95rem; padding: 8px 14px; border: 0; border-radius: 999px; background: var(--accent); color: #fff; cursor: pointer; box-shadow: 0 2px 0 rgba(0,0,0,.2); }
button:hover { filter: brightness(1.1); }
button:active { transform: translateY(1px); box-shadow: none; }
button.toggle { background: #64748b; }
button.toggle.on { background: var(--accent2); }
#wrModes button { background: #64748b; }
#wrModes button.on { background: var(--accent2); }
.slider { display: grid; grid-template-columns: 110px 1fr 70px; align-items: center; gap: 8px; margin: 8px 0; text-align: left; font-size: .95rem; }
.slider.vert { grid-template-columns: 1fr; }
.slider input[type=range] { width: 100%; accent-color: var(--accent); }
.slider select { grid-column: 2 / 4; font: inherit; padding: 6px; border-radius: 8px; background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.slider output { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 8px; }
@media (max-width: 800px) { .grid3 { grid-template-columns: 1fr; } }
.grid3 .slider { grid-template-columns: 1fr; gap: 2px; }
.grid3 .slider output { text-align: left; }
.math, .readout { font: 13px/1.6 Consolas, monospace; background: rgba(100,116,139,.12); border-radius: 10px; padding: 8px 12px; margin-top: 8px; text-align: left; white-space: pre-wrap; }
.try { background: rgba(245,158,11,.14); border-left: 5px solid var(--warn); padding: 10px 14px; border-radius: 10px; margin: 14px 0; }
.real { background: rgba(37,99,235,.12); border-left: 5px solid var(--accent); padding: 8px 12px; border-radius: 8px; margin-top: 8px; }
.status { padding: 10px 14px; border-radius: 10px; font-weight: 600; background: rgba(100,116,139,.15); }
.status.good { background: rgba(34,197,94,.2); } .status.bad { background: rgba(239,68,68,.2); } .status.warn { background: rgba(245,158,11,.22); }
.hint { color: var(--muted); font-size: .85rem; margin: 6px 0 0; }
.legend { font-size: .85rem; color: var(--muted); text-align: center; margin: 4px 0 8px; }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; }
.sw.down { background: #3b82f6; } .sw.up { background: #f59e0b; } .sw.zero { background: #94a3b8; }
.servocards { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sc { display: flex; align-items: center; gap: 8px; background: rgba(100,116,139,.12); border-radius: 10px; padding: 6px 8px; font-size: .8rem; }
.sc b { display: block; }
.sc svg { width: 70px; flex: none; }
.sc.off { opacity: .4; }
.stickrow { display: flex; gap: 16px; align-items: center; justify-content: center; margin-top: 10px; }
#stick { position: relative; width: 150px; height: 150px; border-radius: 50%; background: radial-gradient(circle, rgba(100,116,139,.25), rgba(100,116,139,.08)); border: 3px solid var(--line); touch-action: none; cursor: grab; }
#stick::before, #stick::after { content: ""; position: absolute; background: var(--line); }
#stick::before { left: 50%; top: 8px; bottom: 8px; width: 2px; }
#stick::after { top: 50%; left: 8px; right: 8px; height: 2px; }
#knob { position: absolute; width: 46px; height: 46px; border-radius: 50%; background: var(--accent); left: 50px; top: 50px; box-shadow: 0 4px 8px rgba(0,0,0,.35); }
.camview { display: inline-block; text-align: center; }
.camview svg { width: 200px; border: 4px solid #334155; border-radius: 10px; display: block; }
.camview small { color: var(--muted); }
.codebox { background: var(--codebg); color: var(--codeink); border-radius: 16px; padding: 12px 16px; margin-top: 16px; }
.codebox .ch { display: flex; justify-content: space-between; align-items: center; }
.codebox h3 { margin: 0; }
.codebox pre { margin: 8px 0; overflow-x: auto; font: 13px/1.55 Consolas, "Courier New", monospace; white-space: pre; }
.codebox .hint { color: #94a3b8; }
footer { text-align: center; color: var(--muted); padding: 8px 16px 24px; font-size: .9rem; }
.wire { cursor: pointer; }
.wire:hover path { stroke-width: 7; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

#flyHorizon { max-width: 230px; margin: 0 auto; }

/* extra stations */
.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 900px) { .three { grid-template-columns: minmax(0, 1fr); } }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.pins { margin-top: 16px; }
.pingrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; font-size: .88rem; }
@media (max-width: 900px) { .pingrid { grid-template-columns: 1fr; } }
.pingrid > div { background: rgba(100,116,139,.12); border-radius: 10px; padding: 8px 10px; }
code { background: rgba(100,116,139,.2); padding: 1px 5px; border-radius: 4px; font-size: .9em; }
.cmp { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .88rem; text-align: left; }
.cmp th, .cmp td { padding: 4px 8px; border-bottom: 1px solid var(--line); }
.motorrows { display: grid; gap: 4px; margin-top: 6px; font: 12px/1.3 Consolas, monospace; }
.mrow { display: grid; grid-template-columns: 90px 1fr 70px; gap: 8px; align-items: center; }
.mbar { height: 10px; border-radius: 5px; background: rgba(100,116,139,.25); overflow: hidden; }
.mbar i { display: block; height: 100%; background: var(--accent2); }
.results { display: grid; gap: 8px; }
.res { background: rgba(100,116,139,.12); border-radius: 10px; padding: 8px 12px; border-left: 6px solid var(--line); }
.res.good { border-left-color: var(--good); } .res.warn { border-left-color: var(--warn); } .res.bad { border-left-color: var(--bad); }
.res b { display: block; }
.slider.cols2 { grid-template-columns: 50px 1fr 50px; }
#quizBox .q { font-weight: 700; margin: 6px 0 10px; }
#quizBox .opts { display: grid; gap: 8px; }
#quizBox .opts button { background: #8b5cf6; text-align: left; border-radius: 12px; }
#quizBox .opts button.right { background: #22c55e; } #quizBox .opts button.wrong { background: #ef4444; }
#quizBox .why { margin: 10px 0 !important; }
#gloss dt { font-weight: 700; margin-top: 8px; color: var(--accent2); }
#gloss dd { margin: 0; font-size: .92rem; }
:focus-visible { outline: 3px solid #facc15; outline-offset: 2px; }
.wire:focus-visible { outline: none; } .wire:focus-visible path:last-child { stroke-width: 8; }

/* missions, predictions, tuning */
#missions { max-width: 1100px; margin: 8px auto 0; padding: 10px 16px; background: var(--card); border-radius: 14px; box-shadow: 0 2px 10px rgba(0,0,0,.1); width: calc(100% - 32px); }
.mhead { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.mhead .spacer { flex: 1; }
.stars { font-weight: 700; color: var(--warn); }
button.small { padding: 5px 12px; font-size: .85rem; }
#mList { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 4px; }
#mList li { display: grid; grid-template-columns: 26px 1fr auto; gap: 6px; align-items: baseline; font-size: .93rem; padding: 4px 8px; border-radius: 8px; background: rgba(100,116,139,.1); }
#mList li.done { background: rgba(34,197,94,.16); }
#mList li .pr { color: var(--muted); font-size: .82rem; font-variant-numeric: tabular-nums; }
#predictBox { margin-top: 10px; padding: 10px 12px; border-radius: 12px; background: rgba(139,92,246,.12); border-left: 5px solid #8b5cf6; }
#predictBox .opts { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
#predictBox .opts button { background: #8b5cf6; }
#predictBox .opts button.right { background: #22c55e; } #predictBox .opts button.wrong { background: #ef4444; }
#predictBox .opts button.picked { outline: 3px solid #facc15; }
#toast { position: fixed; left: 50%; bottom: 20px; transform: translate(-50%, 90px); background: #0f172a; color: #fff; padding: 10px 18px; border-radius: 999px; box-shadow: 0 6px 20px rgba(0,0,0,.4); transition: transform .35s; z-index: 20; max-width: 90vw; text-align: center; pointer-events: none; }
#toast.show { transform: translate(-50%, 0); }
#tuneCard { margin-top: 16px; }
#tnChart { background: rgba(100,116,139,.1); border-radius: 10px; }
#tab-fly .slider { grid-template-columns: 110px 1fr 64px; }
nav button.locked { opacity: .55; }