:root{
  --glass:rgba(18,23,28,.80);
  --glass-2:rgba(18,23,28,.62);
  --edge:rgba(232,228,218,.14);
  --ink:#E8E4DA;
  --ink-dim:#A9A59B;
  --ink-faint:#6E6B64;
  --accent:#F26B1D;
  --ok:#7DC67E;
  --warn:#E8B84A;
  --bad:#E0473A;
  --sky:#BFD6E6;
  --disp:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --body:"Barlow","Segoe UI",Arial,sans-serif;
  --mono:"JetBrains Mono","Consolas","Courier New",monospace;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;overflow:hidden;background:var(--sky);color:var(--ink);font-family:var(--body);font-size:14px}
#c{position:fixed;inset:0;display:block;touch-action:none;outline:none}
.hud{position:fixed;pointer-events:none;user-select:none}
.hud *{pointer-events:auto}
.pane{background:var(--glass);border:1px solid var(--edge);border-radius:6px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.lbl{font-family:var(--disp);font-weight:600;letter-spacing:.09em;text-transform:uppercase;font-size:11px;color:var(--ink-dim)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
button{font-family:var(--disp);font-weight:600;font-size:14px;letter-spacing:.05em;text-transform:uppercase;background:transparent;color:var(--ink);border:1px solid var(--edge);border-radius:4px;padding:6px 12px;cursor:pointer}
button:hover{border-color:var(--ink-dim)}
button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
button.primary{background:var(--accent);border-color:var(--accent);color:#14100c}
button.primary:hover{filter:brightness(1.08)}
button.icon{width:34px;height:34px;padding:0;font-size:18px;line-height:1;display:grid;place-items:center}
.kbd{font-family:var(--mono);font-size:11px;color:var(--ink-dim);border:1px solid var(--edge);border-radius:3px;padding:0 4px;margin-left:6px}
button.primary .kbd{color:#14100c;border-color:rgba(20,16,12,.35)}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.seg{display:flex;border:1px solid var(--edge);border-radius:4px;overflow:hidden}
.seg button{flex:1;border:0;border-radius:0;padding:5px 2px;font-size:11px;letter-spacing:.03em}
.seg button.on{background:var(--ink);color:#12171C}
.k{font-family:var(--mono);color:var(--ink);font-size:11px}

/* ---- in-flight strip (top-left) ---- */
#strip{top:14px;left:14px;display:flex;align-items:center;gap:10px;padding:6px 8px;max-width:520px}
#strip .txt{display:flex;flex-direction:column;gap:3px;min-width:180px}
#strip .step{font-family:var(--disp);font-weight:600;font-size:17px;line-height:1.1;display:flex;gap:10px;align-items:baseline}
#strip .step .num{font-size:12px;color:var(--ink-dim)}
#strip .dots{display:flex;gap:4px;height:6px}
#strip .dots i{width:14px;height:5px;border-radius:2px;background:var(--ink-faint);opacity:.5}
#strip .dots i.now{background:var(--accent);opacity:1}
#strip .dots i.done{background:var(--ok);opacity:1}

/* ---- drone camera PiP (top-right) ---- */
#pip{top:14px;right:14px;width:320px;display:flex;flex-direction:column;gap:4px}
#pip .frame{height:180px;border:1px solid var(--edge);border-radius:6px;position:relative;overflow:hidden;background:#0d1114}
#pip .frame canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
#pip .frame::before{content:"";position:absolute;left:50%;top:50%;width:18px;height:18px;transform:translate(-50%,-50%);border:1px solid rgba(232,228,218,.55);border-radius:50%}
#pip .tag{position:absolute;top:6px;left:8px;font-family:var(--disp);font-size:11px;letter-spacing:.09em;color:var(--ink);background:var(--glass-2);padding:2px 6px;border-radius:3px}
#pip .tag.right{left:auto;right:8px;font-family:var(--mono);letter-spacing:0}
#pip .keys{font-size:11px;color:var(--ink-dim);text-align:right}
#pip .ctl{position:absolute;display:flex;flex-direction:column;gap:4px}
#pip .ctl.tilt{right:8px;top:50%;transform:translateY(-50%)}
#pip .ctl.zoom{left:8px;top:50%;transform:translateY(-50%)}
#pip .ctl button{width:30px;height:30px;padding:0;font-size:13px;line-height:1;background:var(--glass-2);border-color:rgba(232,228,218,.3);display:grid;place-items:center;touch-action:none}
#pip .ctl button:active{background:var(--accent);color:#14100c}
#pip.hidden{display:none}

/* ---- bottom-left: instruments block ---- */
#bar{left:14px;bottom:14px;width:300px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:6px 4px}
#bar .g{display:flex;flex-direction:column;align-items:center;gap:1px;padding:5px 2px;border-right:1px solid var(--edge)}
#bar .g:nth-child(4n){border-right:0}
#bar .g:nth-child(-n+4){border-bottom:1px solid var(--edge)}
#bar .g .val{font-family:var(--mono);font-size:18px;font-weight:600;line-height:1;font-variant-numeric:tabular-nums}
#bar .g .val small{font-size:10px;color:var(--ink-dim);font-weight:400;margin-left:2px}
#bar .g .val.warn{color:var(--warn)} #bar .g .val.bad{color:var(--bad)} #bar .g .val.ok{color:var(--ok)}
#bar .g .lbl{font-size:10px}

/* ---- above it: motor controls ---- */
#ctl{left:14px;bottom:132px;width:300px;display:flex;align-items:center;gap:8px;padding:8px 10px}
#ctl #btnAuto{flex:1;min-width:0;padding:8px 10px;font-size:15px}
#ctl #btnAuto.land{border-color:var(--warn);color:var(--warn)}
#ctl #motorTag{font-family:var(--disp);font-weight:700;font-size:14px;letter-spacing:.08em;padding:7px 10px;border-radius:3px;border:1.5px solid var(--ink-faint);color:var(--ink-faint);white-space:nowrap}
#ctl #motorTag.armed{border-color:var(--ok);color:var(--ok)}
#ctl #motorTag.crash{border-color:var(--bad);color:var(--bad);background:rgba(224,71,58,.12)}
#btnSound.off{color:var(--ink-faint);text-decoration:line-through}

/* ---- sticks (Mode 2) ---- */
#sticks{right:14px;bottom:14px;display:flex;gap:10px;padding:8px 10px 6px}
.stick{display:flex;flex-direction:column;align-items:center;gap:4px}
.stick .box{width:88px;height:88px;position:relative;border:1px solid var(--edge);border-radius:4px;background:rgba(0,0,0,.25)}
.stick .box::before,.stick .box::after{content:"";position:absolute;background:var(--edge)}
.stick .box::before{left:50%;top:0;bottom:0;width:1px}
.stick .box::after{top:50%;left:0;right:0;height:1px}
.stick .box .dot{position:absolute;width:12px;height:12px;border-radius:50%;background:var(--accent);left:50%;top:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 2px rgba(0,0,0,.35)}
.stick .box .rng{position:absolute;inset:0;margin:auto;width:44px;height:44px;border:1px dashed rgba(232,228,218,.22);border-radius:4px;display:none}
.stick .box.fine .rng{display:block}
.stick .ax{font-family:var(--disp);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-dim)}


/* ---- centre message ---- */
#msg{left:50%;top:14px;transform:translateX(-50%);font-family:var(--disp);font-weight:700;font-size:24px;letter-spacing:.03em;padding:8px 18px;opacity:0;transition:opacity .25s}
#msg.show{opacity:1}
#msg.bad{color:var(--bad)} #msg.ok{color:var(--ok)} #msg.warn{color:var(--warn)}

/* ---- result card ---- */
#result{left:50%;top:50%;transform:translate(-50%,-50%);width:360px;padding:16px 18px;display:none;flex-direction:column;gap:10px;z-index:4}
#result.show{display:flex}
#result h2{font-family:var(--disp);font-size:24px;margin:0;font-weight:700}
#result h2.ok{color:var(--ok)} #result h2.bad{color:var(--bad)} #result h2.warn{color:var(--warn)}
#result table{border-collapse:collapse;width:100%}
#result td{padding:3px 0;border-bottom:1px solid var(--edge);font-size:13px}
#result td:last-child{text-align:right;font-family:var(--mono)}
#result td:first-child:only-of-type,#result tr:first-child td:empty+td{display:none}
#result td[colspan]{color:var(--warn);line-height:1.4}

/* ---- menu overlay ---- */
#menu{inset:0;background:rgba(10,13,16,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:20px;z-index:6}
#menu.show{display:flex}
#menu .card{width:min(940px,100%);max-height:100%;overflow:auto;background:var(--glass);border:1px solid var(--edge);border-radius:8px;padding:18px 20px;display:flex;flex-direction:column;gap:16px}
#menu header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
#menu .eyebrow{font-family:var(--disp);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-dim)}
#menu h1{font-family:var(--disp);font-weight:700;font-size:32px;line-height:1;margin:2px 0 0}
#menu .cols{display:grid;grid-template-columns:1fr 260px;gap:18px}
#menu .tasks{display:grid;grid-template-columns:1fr 1fr;gap:8px;align-content:start}
#menu .task{display:flex;flex-direction:column;gap:5px;text-align:left;text-transform:none;letter-spacing:0;padding:10px 12px;border-radius:6px;font-family:var(--body);font-weight:400}
#menu .task .name{font-family:var(--disp);font-weight:700;font-size:17px;letter-spacing:.01em}
#menu .task .brief{font-size:12px;color:var(--ink-dim);line-height:1.35}
#menu .task .brief b{color:var(--ink);font-weight:500}
#menu .task .best{font-family:var(--mono);font-size:11px;color:var(--ok)}
#menu .task.on{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
#menu .task.free{grid-column:1 / -1}
#menu .side{display:flex;flex-direction:column;gap:9px}
#menu .field{display:grid;grid-template-columns:72px 1fr;gap:6px;align-items:center}
#menu input[type=text]{background:#0d1114;color:var(--ink);border:1px solid var(--edge);border-radius:4px;padding:4px 6px;font-family:var(--mono);font-size:13px;width:100%}
#menu input[type=range]{width:100%;accent-color:var(--accent)}
#menu .src{font-family:var(--mono);font-size:11px;color:var(--ink-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#menu .src.ok{color:var(--ok)} #menu .src.warn{color:var(--warn)}
#menu .fine{font-size:11px;color:var(--ink-faint);margin:4px 0 0}
@media (max-width:860px){ #menu .cols{grid-template-columns:1fr} #menu .tasks{grid-template-columns:1fr} #pip{width:220px} #pip .frame{height:124px} }

/* ---- log drawer ---- */
#log{top:14px;bottom:14px;right:14px;width:min(760px,calc(100vw - 28px));padding:14px 16px;display:none;flex-direction:column;gap:10px;z-index:7}
#log.show{display:flex}
#log h2{font-family:var(--disp);font-size:22px;margin:0;font-weight:700}
#log .sum{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
#log .sum div{border:1px solid var(--edge);border-radius:4px;padding:6px 8px}
#log .sum .val{font-family:var(--mono);font-size:20px;font-weight:600}
#log .tbl{overflow:auto;flex:1;border:1px solid var(--edge);border-radius:4px}
#log table{border-collapse:collapse;width:100%;font-size:12px}
#log th{position:sticky;top:0;background:#1a2027;text-align:left;padding:5px 7px;font-family:var(--disp);letter-spacing:.06em;text-transform:uppercase;font-size:11px;color:var(--ink-dim)}
#log td{padding:4px 7px;border-top:1px solid var(--edge);font-family:var(--mono);white-space:nowrap}
#log td.bad{color:var(--bad)} #log td.ok{color:var(--ok)}
#log textarea{width:100%;height:80px;background:#0d1114;color:var(--ink-dim);border:1px solid var(--edge);border-radius:4px;font-family:var(--mono);font-size:11px;padding:6px}

@media (prefers-reduced-motion:reduce){ #msg{transition:none} }

/* ---- tutorial overlay ---- */
#tutorial{inset:0;background:rgba(10,13,16,.6);display:none;align-items:center;justify-content:center;padding:20px;z-index:8}
#tutorial.show{display:flex}
#tutorial .card{width:min(860px,100%);max-height:100%;overflow:auto;background:var(--glass);border:1px solid var(--edge);border-radius:8px;padding:18px 20px;display:flex;flex-direction:column;gap:14px}
#tutorial header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
#tutorial .eyebrow{font-family:var(--disp);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-dim)}
#tutorial h1{font-family:var(--disp);font-weight:700;font-size:26px;line-height:1;margin:2px 0 0}
#tutorial .intro{margin:0;color:var(--ink-dim);line-height:1.45;max-width:72ch}
#tutorial .intro b,#tutorial .steps b{color:var(--ink);font-weight:500;font-family:var(--mono);font-size:12px}
#tutorial .keys{display:flex;flex-direction:column;gap:5px;overflow-x:auto;padding:4px 0}
#tutorial .krow{display:flex;gap:5px}
#tutorial .krow:nth-child(2){padding-left:24px} #tutorial .krow:nth-child(3){padding-left:36px} #tutorial .krow:nth-child(4){padding-left:12px} #tutorial .krow:nth-child(5){padding-left:48px}
#tutorial .key{width:74px;height:54px;border:1px solid var(--edge);border-radius:5px;display:flex;flex-direction:column;justify-content:space-between;padding:5px 6px;background:rgba(0,0,0,.25);flex:none}
#tutorial .key.blank{border-color:transparent;background:rgba(255,255,255,.03)}
#tutorial .key b{font-family:var(--mono);font-size:14px;font-weight:600}
#tutorial .key small{font-size:10px;line-height:1.1;color:var(--ink-dim)}
#tutorial .key.left{border-color:var(--accent);background:rgba(242,107,29,.16)}
#tutorial .key.right{border-color:#5fa8d3;background:rgba(95,168,211,.16)}
#tutorial .key.arm{border-color:var(--ok);background:rgba(125,198,126,.16)}
#tutorial .key.cam{border-color:var(--warn);background:rgba(232,184,74,.14)}
#tutorial .key.cmd{border-color:var(--ink-dim)}
#tutorial .key.fine{border-color:#b48ad8;background:rgba(180,138,216,.16)}
#tutorial .key.off{border-color:var(--bad);color:var(--ink-dim)}
#tutorial .legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--ink-dim)}
#tutorial .legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:5px;vertical-align:-2px;border:1px solid var(--edge)}
#tutorial .legend i.left{background:var(--accent)} #tutorial .legend i.right{background:#5fa8d3} #tutorial .legend i.arm{background:var(--ok)} #tutorial .legend i.cam{background:var(--warn)} #tutorial .legend i.cmd{background:var(--ink-dim)} #tutorial .legend i.fine{background:#b48ad8}
#tutorial .steps{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:5px;line-height:1.4;font-size:13px;color:var(--ink-dim);max-width:78ch}

/* ---- inspection answer panel ---- */
#answers{left:50%;bottom:24px;transform:translateX(-50%);padding:10px 12px;display:none;flex-direction:column;gap:8px;z-index:3}
#answers.show{display:flex}
#answers .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
#answers .grid button{padding:8px 10px;font-size:13px;text-transform:none;letter-spacing:0;font-family:var(--body);font-weight:500}

/* ---- entry gate ---- */
#gate{inset:0;background:rgba(10,13,16,.62);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);display:none;align-items:center;justify-content:center;padding:20px;z-index:9}
#gate.show{display:flex}
#gate .card{width:min(820px,100%);background:var(--glass);border:1px solid var(--edge);border-radius:8px;padding:22px 24px;display:flex;flex-direction:column;gap:14px}
#gate .eyebrow{font-family:var(--disp);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-dim)}
#gate h1{font-family:var(--disp);font-weight:700;font-size:34px;line-height:1;margin:0}
#gate .roles{display:grid;grid-template-columns:1fr 1fr;gap:14px}
#gate .role{border:1px solid var(--edge);border-radius:6px;padding:14px 16px;display:flex;flex-direction:column;gap:8px}
#gate .role h2{font-family:var(--disp);font-size:22px;margin:0;font-weight:700}
#gate .role p{margin:0;color:var(--ink-dim);font-size:13px;line-height:1.4}
#gate input,#gate select{background:#0d1114;color:var(--ink);border:1px solid var(--edge);border-radius:4px;padding:7px 8px;font-family:var(--mono);font-size:14px;width:100%}
#gate .btn{display:inline-block;text-align:center;font-family:var(--disp);font-weight:600;font-size:14px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink);border:1px solid var(--edge);border-radius:4px;padding:7px 12px;text-decoration:none;margin-top:auto}
#gate .btn:hover{border-color:var(--ink-dim)}
#gate .err{color:var(--bad)} #gate .fine{font-size:11px;color:var(--ink-faint)}
#gate button.primary{margin-top:auto}
@media (max-width:700px){ #gate .roles{grid-template-columns:1fr} }
#btnSound.off{color:var(--ink-faint);text-decoration:line-through}

/* ---- home links in overlay headers ---- */
a.home{color:inherit;text-decoration:none;display:block}
a.home:hover .eyebrow{color:var(--accent)}