:root{
  --ink:#e9f1f7;
  --muted:#8ea3b3;
  --bg:#070b10;
  --panel:#0e1620;
  --line:rgba(160,190,210,.18);
  --amber:#ffb54a;
  --cyan:#56d8e8;
  --red:#e4463f;
  --green:#77d38c;
  --panel-h: 56vh;
  --safe: env(safe-area-inset-bottom, 0px);
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);
  font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-user-select:none;user-select:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
canvas{display:block}

#app{position:fixed;inset:0;display:flex;flex-direction:column;background:#05080c}
#world-wrap{position:relative;flex:1 1 auto;min-height:0;overflow:hidden;background:#0a1a28}
#world{position:absolute;inset:0;width:100%;height:100%}

#panel-area{
  --panel-w: min(97vw, calc(min(56vh,42vw) * 2.612), 1780px);
  position:relative;flex:0 0 auto;height:min(56vh,42vw);
  padding-bottom:10px;
  background:
    radial-gradient(120% 160% at 50% 0%, #1a2430 0%, #0b1118 45%, #06090d 100%);
  border-top:1px solid rgba(180,210,230,.16);
  box-shadow:0 -18px 40px rgba(0,0,0,.55);
  overflow:hidden;
  display:flex;align-items:flex-end;justify-content:center;
}
#panel-area::before{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.012) 0 2px, transparent 2px 5px),
    linear-gradient(180deg, rgba(0,0,0,.55), transparent 22%, transparent 78%, rgba(0,0,0,.35));
  pointer-events:none;
}
#panel{
  position:relative;z-index:2;
  width:var(--panel-w);
  aspect-ratio:700/268;
  filter:drop-shadow(0 8px 18px rgba(0,0,0,.65));
  touch-action:none;
}

/* panel-side trim / flaps / circuit breakers */
.panel-console{
  position:absolute;z-index:4;
  right:calc((100% - var(--panel-w)) / 2 + 6px);
  bottom:12px;width:142px;padding:7px 8px 8px;
  border:1px solid rgba(150,195,215,.28);border-radius:8px;
  background:linear-gradient(180deg,rgba(10,18,25,.96),rgba(5,9,13,.97));
  box-shadow:0 8px 24px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.03);
  color:#cfe2ec;font-size:9px;
}
.pc-head{font-size:8px;letter-spacing:.18em;color:#8fb4c6;text-align:center;
  padding-bottom:5px;margin-bottom:6px;border-bottom:1px solid rgba(150,195,215,.14)}
.pc-group{margin-bottom:7px}
.pc-group:last-child{margin-bottom:0}
.pc-label{display:flex;justify-content:space-between;align-items:baseline;
  margin-bottom:4px;font-size:8px;letter-spacing:.10em;color:#8ea9b8}
.pc-label b{font-family:"Consolas",monospace;font-size:10px;color:#eaf6fb;letter-spacing:0}
.pc-row{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.pc-row button,.pc-flaps button{
  border:1px solid rgba(150,195,215,.24);border-radius:4px;background:#0e1a24;
  color:#cfe2ec;padding:4px 2px;font-size:8px;cursor:pointer;transition:.12s}
.pc-row button:hover,.pc-flaps button:hover{background:#1a2c3a;border-color:rgba(120,210,230,.5)}
.pc-row button:active{background:#1b3a47}
.pc-flaps{display:grid;grid-template-columns:repeat(4,1fr);gap:3px}
.pc-flaps button{padding:4px 0;font-size:7.5px}
.pc-flaps button.active{border-color:var(--cyan);background:#1b3a47;color:#eafcff}
.pc-track{height:4px;border-radius:99px;background:#152430;margin-top:5px;overflow:hidden}
.pc-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,#1b6fb5,#7fc7ff);transition:width .15s}
.pc-breakers{display:grid;grid-template-columns:repeat(4,1fr);gap:3px}
.pc-breaker{
  display:flex;flex-direction:column;align-items:center;gap:2px;padding:3px 1px 2px;
  border:1px solid rgba(150,195,215,.16);border-radius:4px;background:#0b131b;cursor:pointer;
}
.pc-breaker i{display:block;width:12px;height:8px;border-radius:2px;
  background:#243747;border:1px solid rgba(180,210,225,.35);position:relative;transition:.12s}
.pc-breaker i::after{content:"";position:absolute;left:2px;right:2px;top:2px;height:2px;
  border-radius:1px;background:#7c93a3;transition:.12s}
.pc-breaker span{font-size:6.5px;letter-spacing:.02em;color:#8ea6b4}
.pc-breaker.on i{background:#123b44;border-color:var(--cyan);box-shadow:0 0 5px rgba(86,216,232,.35)}
.pc-breaker.on i::after{background:#8ff0ff}
.pc-breaker.on span{color:#cfeaf2}
.panel-side{position:absolute;top:0;bottom:0;width:22%;pointer-events:none;
  background:
    radial-gradient(90% 80% at 20% 20%, rgba(52,70,86,.35), transparent 65%),
    radial-gradient(80% 90% at 90% 70%, rgba(30,44,58,.45), transparent 60%);
  opacity:.8}
.panel-side::after{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg, rgba(255,255,255,.02) 0 1px, transparent 1px 7px)}
#panel-side-left{left:0;transform:scaleX(-1)}
#panel-side-right{right:0}
#app.no-panel #panel-area{display:none}
#app.no-panel #world-wrap{flex:1 1 100%}

/* canopy framing */
#canopy-frame{position:absolute;inset:0;pointer-events:none;z-index:1;opacity:.55}
#canopy-frame::before,#canopy-frame::after{content:"";position:absolute;top:0;bottom:0;width:8%;
  background:linear-gradient(90deg, rgba(4,7,10,.9), rgba(4,7,10,.25) 55%, transparent)}
#canopy-frame::before{left:0;clip-path:polygon(0 0,100% 0,45% 100%,0 100%)}
#canopy-frame::after{right:0;transform:scaleX(-1);clip-path:polygon(0 0,100% 0,45% 100%,0 100%)}

/* top bar */
#topbar{position:absolute;top:0;left:0;right:0;z-index:20;display:flex;align-items:center;gap:14px;
  padding:10px 14px 22px;background:linear-gradient(180deg, rgba(2,5,8,.78), rgba(2,5,8,0));
  pointer-events:none}
#topbar>*{pointer-events:auto}
.brand{display:flex;align-items:center;gap:10px;min-width:150px}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:linear-gradient(145deg,#d33a32,#8e1f1c);color:#fff;font-weight:800;font-size:20px;
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset,0 4px 12px rgba(0,0,0,.4)}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{font-size:13px;letter-spacing:.18em}
.brand-text span{font-size:10px;color:var(--muted);letter-spacing:.14em}
.hud{display:flex;gap:2px;flex:1;justify-content:center;flex-wrap:wrap}
.hud-cell{display:flex;align-items:baseline;gap:4px;padding:5px 9px;border:1px solid var(--line);
  border-radius:6px;background:rgba(8,14,20,.62);backdrop-filter:blur(5px)}
.hud-cell span{font-size:9px;color:var(--muted);letter-spacing:.12em}
.hud-cell b{font-family:"Bahnschrift","Consolas",monospace;font-size:15px;font-weight:600;color:#f3f7fa;min-width:32px;text-align:right}
.hud-cell i{font-style:normal;font-size:9px;color:var(--muted)}
.top-actions{display:flex;gap:6px;align-items:center;margin-left:auto}
.icon-btn{width:34px;height:34px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line);
  background:rgba(8,14,20,.66);color:#cfe2ee;backdrop-filter:blur(5px);transition:.15s}
.icon-btn:hover{background:rgba(30,52,68,.8);color:#fff;border-color:rgba(120,210,230,.45)}
.icon-btn:active{transform:translateY(1px)}
.icon-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.icon-btn.off{opacity:.45}

/* hint + toast */
.hint{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:16;
  max-width:min(92%,720px);padding:9px 16px;border-radius:999px;border:1px solid rgba(86,216,232,.35);
  background:rgba(6,15,22,.82);backdrop-filter:blur(8px);color:#dff8fc;font-size:13px;text-align:center;
  box-shadow:0 8px 24px rgba(0,0,0,.35);transition:opacity .25s}
.hint b{color:var(--amber)}
.toast{position:absolute;left:50%;top:76px;transform:translateX(-50%);z-index:30;
  padding:11px 18px;border-radius:10px;border:1px solid rgba(255,181,74,.45);
  background:rgba(18,14,8,.9);color:#ffe2b4;font-size:13px;box-shadow:0 8px 30px rgba(0,0,0,.5)}
.toast.bad{border-color:rgba(228,70,63,.6);color:#ffc7c4;background:rgba(28,8,8,.92)}
.toast.good{border-color:rgba(119,211,140,.5);color:#c9f7d4;background:rgba(8,24,14,.92)}

/* systems console (flaps / trim / engine) */
.systems-panel{position:absolute;left:14px;top:68px;z-index:19;width:206px;max-height:calc(100% - 88px);
  border:1px solid rgba(150,195,215,.22);border-radius:10px;background:rgba(6,13,19,.82);
  backdrop-filter:blur(8px);box-shadow:0 10px 30px rgba(0,0,0,.35);overflow:hidden;
  font-size:10px;color:#cfe2ec}
.sp-head{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;
  border-bottom:1px solid rgba(150,195,215,.14);background:rgba(15,27,38,.7);
  font-size:9px;letter-spacing:.16em;color:#8fb4c6}
.sp-head button{border:none;background:none;color:#cfe2ec;font-size:16px;line-height:1;cursor:pointer;padding:0 3px}
.sp-body{padding:9px 10px 10px}
.systems-panel.collapsed .sp-body{display:none}
.sp-group{padding:6px 0;border-bottom:1px solid rgba(150,195,215,.09)}
.sp-group:last-of-type{border-bottom:none}
.sp-label{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:5px;
  font-size:8.5px;letter-spacing:.12em;color:#8ea9b8}
.sp-label b{font-family:"Bahnschrift","Consolas",monospace;font-size:11px;color:#e9f4f9;letter-spacing:0}
.sp-flaps{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.sp-flaps button,.sp-trim button,.sp-switches button{border:1px solid rgba(150,195,215,.22);
  background:#0e1a24;color:#cfe2ec;border-radius:5px;padding:5px 3px;font-size:9px;cursor:pointer;transition:.12s}
.sp-flaps button:hover,.sp-trim button:hover,.sp-switches button:hover{background:#1a2c3a;border-color:rgba(120,210,230,.45)}
.sp-flaps button.active,.sp-switches button.active{border-color:var(--cyan);background:#1b3a47;color:#eafcff}
.sp-track{height:4px;border-radius:99px;background:#152430;margin-top:6px;overflow:hidden}
.sp-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,#1b6fb5,#7fc7ff);transition:width .15s}
.sp-trim{display:flex;align-items:center;gap:5px}
.sp-trim button{flex:0 0 auto;padding:4px 5px;font-size:8px}
.sp-trim-track{position:relative;flex:1;height:5px;border-radius:99px;background:#152430}
.sp-trim-track i{position:absolute;top:-3px;left:50%;width:8px;height:11px;border-radius:2px;
  background:#ffd070;box-shadow:0 0 5px rgba(255,208,112,.45);transform:translateX(-50%);transition:left .1s}
.sp-throttle input{width:100%;margin-top:3px}
.sp-switches{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.sp-switches button{padding:5px 4px;font-size:8px;letter-spacing:.03em}
.sp-switches button.ign{grid-column:span 2}
.sp-wind{font-family:"Consolas",monospace;font-size:9px;color:#93aebb;padding-top:6px}

/* on-screen controls */
.ctrl-strip{position:absolute;left:50%;bottom:10px;transform:translateX(-50%);z-index:18;
  display:flex;align-items:flex-end;gap:14px;padding:10px 14px;border-radius:12px;
  border:1px solid var(--line);background:rgba(6,12,18,.78);backdrop-filter:blur(9px);
  box-shadow:0 10px 30px rgba(0,0,0,.4);max-width:96vw}
.lever-block{display:flex;flex-direction:column;gap:5px;min-width:150px}
.lever-block.narrow{min-width:100px}
.lever-block label{font-size:9px;letter-spacing:.12em;color:var(--muted);display:flex;justify-content:space-between}
.lever-block label span{color:#dbeaf4;font-family:"Bahnschrift",monospace}
input[type=range]{appearance:none;-webkit-appearance:none;height:5px;border-radius:99px;background:#1b2a36;outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;
  background:linear-gradient(145deg,#eaf6fb,#8fb6c9);box-shadow:0 0 0 1px #0c141b,0 2px 6px rgba(0,0,0,.5);cursor:grab}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border:none;border-radius:50%;background:#cfe4ee}
.btn-row{display:grid;grid-template-columns:repeat(3,auto);gap:5px}
.btn-row button{padding:7px 9px;font-size:10px;letter-spacing:.06em;border-radius:6px;border:1px solid var(--line);
  background:#101c26;color:#cfe2ee;transition:.12s}
.btn-row button:hover{background:#1a2c3a;border-color:rgba(120,210,230,.4)}
.btn-row button.active{background:#244452;border-color:var(--cyan);color:#eafcff}

/* touch controls */
.touch-controls{position:absolute;inset:0;z-index:15;pointer-events:none;display:flex;justify-content:space-between;align-items:flex-end;padding:16px 18px}
.stick-zone{width:132px;height:132px;pointer-events:auto;display:grid;place-items:center}
.stick-base{width:110px;height:110px;border-radius:50%;border:1px solid rgba(160,200,220,.28);
  background:radial-gradient(circle at 50% 40%,rgba(40,64,82,.5),rgba(5,10,14,.55));touch-action:none}
.stick-knob{width:44px;height:44px;margin:33px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#e3f3fa,#7b9caf);box-shadow:0 4px 12px rgba(0,0,0,.55)}
.touch-throttle{pointer-events:auto;height:160px;display:flex;align-items:center}
.touch-throttle input{writing-mode:vertical-lr;direction:rtl;width:8px;height:150px}
.touch-buttons{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);display:grid;
  grid-template-columns:repeat(3,auto);gap:6px;pointer-events:auto}
.touch-buttons button{padding:9px 10px;font-size:10px;letter-spacing:.05em;border-radius:7px;
  border:1px solid rgba(160,200,220,.30);background:rgba(8,15,21,.78);color:#dfeef7;backdrop-filter:blur(6px)}
.touch-buttons button:active{background:#254454;border-color:var(--cyan)}

/* screens / modals */
.screen{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:22px}
.screen[hidden]{display:none}
.overlay{background:rgba(3,7,11,.72);backdrop-filter:blur(7px)}
.start-bg{position:absolute;inset:0;background:url('../assets/img/hero.png') center 42%/cover no-repeat;
  filter:saturate(.9) contrast(1.04);transform:scale(1.02)}
.start-vignette{position:absolute;inset:0;background:
  radial-gradient(90% 80% at 50% 40%, transparent 25%, rgba(2,5,8,.55) 75%, rgba(2,5,8,.92) 100%),
  linear-gradient(90deg, rgba(2,5,8,.88) 0%, rgba(2,5,8,.25) 45%, rgba(2,5,8,.75) 100%)}
.start-inner{position:relative;z-index:2;width:min(780px,94vw);text-align:left}
.start-kicker{font-size:10px;letter-spacing:.32em;color:#9ec5d6;margin-bottom:10px}
.start-inner h1{margin:0;font-size:clamp(58px,10vw,126px);line-height:.82;letter-spacing:-.02em;font-weight:800;
  color:#f4f8fa;text-shadow:0 8px 40px rgba(0,0,0,.6)}
.start-inner h1 span{color:var(--red)}
.start-model{margin:16px 0 0;font-size:clamp(20px,2.5vw,30px);letter-spacing:.04em;color:#e8f1f6;font-weight:300}
.start-model b{color:var(--red);font-weight:700}
.start-sub{margin:8px 0 26px;font-size:15px;line-height:1.55;color:#cfdde7;max-width:520px}
.start-actions{display:flex;flex-wrap:wrap;gap:9px}
.btn{padding:11px 18px;border-radius:8px;border:1px solid rgba(170,205,220,.28);
  background:rgba(10,18,26,.66);color:#e6f1f7;font-size:13px;letter-spacing:.02em;
  transition:.15s;backdrop-filter:blur(5px)}
.btn:hover{background:rgba(30,52,68,.85);border-color:rgba(120,210,230,.55)}
.btn.primary{background:linear-gradient(145deg,#d64037,#9e2621);border-color:#e8655c;color:#fff;font-weight:600}
.btn.primary:hover{background:linear-gradient(145deg,#e04a40,#b12b25)}
.btn.danger{color:#ffb8b4;border-color:rgba(228,70,63,.45)}
.start-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px;font-size:10px;letter-spacing:.12em;color:#8fa8b7}
.start-note{margin-top:18px;font-size:10px;line-height:1.5;color:#758b99;max-width:560px}

.modal{position:relative;width:min(520px,94vw);max-height:90vh;overflow:auto;padding:26px;
  border-radius:14px;border:1px solid rgba(160,200,220,.22);
  background:linear-gradient(160deg,rgba(18,29,39,.97),rgba(7,12,17,.98));
  box-shadow:0 30px 80px rgba(0,0,0,.65)}
.modal.wide{width:min(900px,95vw)}
.modal h2{margin:0 0 18px;font-size:20px;letter-spacing:.04em;font-weight:600}
.modal-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.close{position:absolute;right:10px;top:8px;width:32px;height:32px;border:none;background:none;color:#9fb4c2;font-size:26px;line-height:1}
.close:hover{color:#fff}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.help-grid h3{margin:0 0 10px;font-size:11px;letter-spacing:.16em;color:var(--amber);font-weight:600}
.help-grid dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0;font-size:12px}
.help-grid dt{font-family:"Bahnschrift","Consolas",monospace;color:#dff6ff;white-space:nowrap}
.help-grid dd{margin:0;color:#a9becb}
.help-note{font-size:11px;line-height:1.5;color:#8298a6;margin:20px 0 0}
.settings-list{display:flex;flex-direction:column;gap:2px}
.set-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:10px 2px;border-bottom:1px solid rgba(150,185,205,.09);font-size:13px}
.set-row:last-child{border-bottom:none}
.set-row input[type=range]{width:160px}
.set-row select{background:#0e1a24;border:1px solid var(--line);border-radius:6px;padding:6px 8px;font-size:12px}
.set-row input[type=checkbox]{width:17px;height:17px;accent-color:#d64037}

/* radio */
.radio-modal{width:min(560px,95vw)}
.radio-stack{display:flex;flex-direction:column;gap:7px}
.radio-unit{display:flex;align-items:center;gap:12px;width:100%;padding:7px 9px;border-radius:8px;
  border:1px solid rgba(150,190,210,.18);background:linear-gradient(180deg,#0b141b,#060b0f)}
.radio-thumb{display:block;width:82px;height:auto;flex:0 0 auto;border-radius:4px;
  border:1px solid rgba(150,190,210,.16);opacity:.96}
.radio-info{flex:1 1 auto;min-width:0}
.radio-name{font-size:9px;letter-spacing:.15em;color:#8ea3b3;margin-bottom:4px}
.radio-digits{font-family:"Bahnschrift","Consolas",monospace;color:#ffd36b;
  font-size:clamp(13px,2.1vw,18px);letter-spacing:.08em;text-shadow:0 0 8px rgba(255,190,80,.28);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.radio-btns{display:flex;gap:5px;flex:0 0 auto}
.radio-btns button{min-width:28px;height:28px;padding:0 7px;border-radius:5px;
  border:1px solid rgba(160,200,220,.25);background:rgba(9,16,22,.75);color:#dfeef7;font-size:11px;line-height:1}
.radio-btns button:hover{background:#223744}
.radio-btns button[disabled]{opacity:.35;cursor:default}
.radio-note{font-size:11px;line-height:1.5;color:#8ea3b3;margin-top:14px}

/* gps */
.gps-modal{width:min(620px,95vw)}
.gps-body{display:flex;justify-content:center}
#gps-canvas{width:min(456px,86vw);height:auto;border-radius:8px;border:1px solid rgba(160,200,220,.2);background:#000}

.result-body{font-size:13px;line-height:1.7;color:#c2d3de}
.result-body b{color:#fff}
.result-body .score{font-size:42px;font-weight:700;color:var(--amber);line-height:1}
.result-body .verdict{color:#a9d9b6}
.result-body .bad{color:#ff9a94}

@media (max-width:900px){
  .systems-panel{left:8px;top:56px;width:174px;font-size:9px;max-height:calc(100% - 70px)}
  .sp-body{padding:7px 8px 8px}
  .sp-flaps button,.sp-trim button{padding:4px 2px;font-size:8px}
  #panel-area{height:min(52vh,58vw);--panel-w:min(99vw, calc(min(52vh,58vw) * 2.612))}
  #panel{width:var(--panel-w)}
  .panel-console{right:calc((100% - var(--panel-w)) / 2 + 3px);bottom:6px;width:150px;padding:6px 7px 7px;font-size:8px}
  .pc-breaker span{font-size:6px}
  .hud{display:none!important}
  .brand-text span{display:none}
  .ctrl-strip{display:none!important}
  .help-grid{grid-template-columns:1fr}
  .start-inner h1{font-size:clamp(48px,14vw,86px)}
}
@media (max-aspect-ratio:1/1){
  .start-inner{text-align:left}
  .start-inner h1{font-size:clamp(42px,13vw,68px)}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* Host-site navigation, separate from flight controls. */
.start-home-link{display:inline-block;color:#e8f1f6;text-decoration:none;font-size:14px;margin-bottom:24px}.start-home-link:hover,.start-home-link:focus-visible{text-decoration:underline}.site-return{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:0 9px;color:#e8f1f6;text-decoration:none;font-size:12px;border:1px solid rgba(255,255,255,.16);border-radius:8px;white-space:nowrap}.site-return:hover,.site-return:focus-visible{background:rgba(255,255,255,.12)}@media(max-width:760px){.site-return-label{display:none}.site-return{padding:0;width:30px;min-height:30px}.start-home-link{margin-bottom:14px}}