/* ============================================================
   Lunar Descent — 3D Moon Lander
   ============================================================ */
:root{
  --bg:#05070d;
  --panel:rgba(12,17,28,.72);
  --panel-solid:#0e1420;
  --line:rgba(140,190,255,.20);
  --line-strong:rgba(140,190,255,.38);
  --txt:#dfe8f5;
  --txt-dim:#93a4bd;
  --cyan:#5fd7ff;
  --amber:#ffb347;
  --green:#6ef2a4;
  --red:#ff5d5d;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--txt);font-family:var(--sans);overflow:hidden}
body{-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
#app{position:fixed;inset:0;overflow:hidden}
canvas#scene{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}
.hidden{display:none!important}
button{font-family:inherit}

/* ---------------- Screens ---------------- */
.screen{position:absolute;inset:0;z-index:40;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 100% at 50% 0%,rgba(18,28,48,.92),rgba(4,6,12,.97));
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);overflow-y:auto;padding:24px}
.screen-inner{width:min(1080px,100%);margin:auto}
.screen h2{font-size:22px;margin:0 0 14px;letter-spacing:.06em;text-transform:uppercase;color:var(--cyan);font-family:var(--mono)}
.plain{background:#04060c}

/* loading */
.progress{height:6px;background:rgba(255,255,255,.10);border-radius:99px;overflow:hidden;margin:18px 0 10px}
#loadBar{height:100%;width:8%;background:linear-gradient(90deg,var(--cyan),var(--green));transition:width .25s}
.hint{color:var(--txt-dim);font-size:13px;font-family:var(--mono)}

/* menu */
.menu-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:38px;align-items:start}
.brand-kicker{font-family:var(--mono);font-size:12px;letter-spacing:.34em;color:var(--amber);margin-bottom:10px}
.brand h1{font-family:var(--mono);font-size:clamp(34px,6vw,60px);line-height:.95;margin:0 0 14px;letter-spacing:.02em}
.brand h1 span{display:block;color:var(--cyan);text-shadow:0 0 26px rgba(95,215,255,.35)}
.tagline{color:var(--txt-dim);max-width:52ch;line-height:1.6;margin:0 0 26px;font-size:15px}
.controls-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.cg h3{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--txt-dim);margin:0 0 10px;text-transform:uppercase}
.cg ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.cg li{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--txt-dim)}
.cg li span:last-child{margin-left:auto;text-align:right;color:var(--txt)}
.cg .k{font-family:var(--mono);color:var(--txt)}
kbd{display:inline-block;min-width:24px;text-align:center;padding:3px 7px;font-family:var(--mono);font-size:11px;
  border:1px solid var(--line-strong);border-bottom-width:2px;border-radius:5px;background:rgba(255,255,255,.05);color:var(--txt)}

.missions h2{font-family:var(--mono);font-size:13px;letter-spacing:.24em;color:var(--txt-dim);margin:0 0 14px}
.level-list{display:flex;flex-direction:column;gap:12px}
.level-card{display:block;width:100%;text-align:left;padding:16px 18px;border-radius:14px;cursor:pointer;
  border:1px solid var(--line);background:linear-gradient(180deg,rgba(20,30,48,.85),rgba(10,15,25,.85));
  color:var(--txt);transition:transform .12s,border-color .12s,box-shadow .12s}
.level-card:hover,.level-card:focus-visible{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.5);outline:none}
.level-card .lc-top{display:flex;align-items:baseline;gap:10px;margin-bottom:6px}
.level-card .lc-num{font-family:var(--mono);font-size:11px;color:var(--amber);letter-spacing:.16em}
.level-card .lc-name{font-weight:650;font-size:16px;letter-spacing:.01em}
.level-card .lc-best{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--green)}
.level-card .lc-desc{color:var(--txt-dim);font-size:12.5px;line-height:1.5}
.level-card .lc-stats{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:10px;letter-spacing:.1em;padding:3px 8px;border-radius:99px;
  border:1px solid var(--line);color:var(--txt-dim);text-transform:uppercase}
.chip.easy{border-color:rgba(110,242,164,.4);color:var(--green)}
.chip.hard{border-color:rgba(255,93,93,.4);color:var(--red)}
.menu-foot{display:flex;gap:10px;margin-top:18px}

/* manual */
.manual h2{margin-bottom:20px}
.manual-cols{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:26px}
.manual h3{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--amber);text-transform:uppercase;margin:0 0 8px}
.manual p{color:var(--txt-dim);line-height:1.65;font-size:14px;margin:0 0 18px}
.limits{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.limits li{font-size:13.5px;color:var(--txt-dim);padding-left:16px;position:relative}
.limits li:before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:99px;background:var(--cyan)}
.limits b{color:var(--txt)}

/* buttons */
.primary-btn,.ghost-btn{border-radius:11px;padding:12px 22px;font-size:14px;font-weight:600;cursor:pointer;
  border:1px solid transparent;transition:.12s;letter-spacing:.02em}
.primary-btn{background:linear-gradient(180deg,#6fe0ff,#2aa6d6);color:#04121a;box-shadow:0 8px 24px rgba(60,190,240,.28)}
.primary-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.ghost-btn{background:rgba(255,255,255,.05);border-color:var(--line-strong);color:var(--txt)}
.ghost-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.primary-btn:focus-visible,.ghost-btn:focus-visible,.level-card:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* result */
.result{text-align:center;max-width:620px}
.badge{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.3em;padding:6px 16px;border-radius:99px;
  border:1px solid var(--green);color:var(--green);margin-bottom:16px}
.badge.bad{border-color:var(--red);color:var(--red)}
.result h2{font-size:clamp(24px,4vw,34px);color:var(--txt);text-transform:none;letter-spacing:0}
.result-text{color:var(--txt-dim);line-height:1.6;margin:0 0 22px}
.score-table{display:flex;flex-direction:column;gap:2px;margin-bottom:26px;font-family:var(--mono);font-size:13px}
.score-table .row{display:flex;justify-content:space-between;padding:9px 14px;background:rgba(255,255,255,.035);border-radius:6px}
.score-table .row.total{background:rgba(95,215,255,.12);color:var(--cyan);font-weight:700;margin-top:6px}
.score-table .row span:first-child{color:var(--txt-dim)}
.score-table .row.total span:first-child{color:var(--cyan)}
.result-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* pause */
.pause{text-align:center;max-width:420px}

/* ---------------- HUD ---------------- */
.hud{position:absolute;inset:0;z-index:20;pointer-events:none;padding:14px;
  padding-top:max(14px,env(safe-area-inset-top));padding-bottom:max(14px,env(safe-area-inset-bottom))}
.hud .panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;
  backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);box-shadow:0 6px 24px rgba(0,0,0,.35)}
.hud-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.mission{padding:10px 15px}
.mission-name{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--cyan)}
.mission-sub{display:flex;gap:16px;margin-top:5px;font-family:var(--mono);font-size:11px;color:var(--txt-dim);letter-spacing:.06em}
.mission-sub b{color:var(--txt)}
.hud-buttons{display:flex;gap:8px;pointer-events:auto}
.icon-btn{background:var(--panel);border:1px solid var(--line);border-radius:11px;color:var(--txt);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;padding:8px 12px;cursor:pointer;min-width:62px;
  display:flex;flex-direction:column;align-items:center;gap:2px;backdrop-filter:blur(9px);transition:.12s}
.icon-btn small{font-size:9px;color:var(--txt-dim);letter-spacing:.08em}
.icon-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.icon-btn.on{border-color:rgba(110,242,164,.5)}
.icon-btn.on small{color:var(--green)}
.icon-btn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.hud-center{position:absolute;left:0;right:0;top:16%;display:flex;justify-content:center;pointer-events:none}
.banner{font-family:var(--mono);font-size:clamp(15px,2.6vw,22px);letter-spacing:.28em;padding:10px 26px;border-radius:10px;
  background:rgba(6,10,18,.72);border:1px solid var(--line-strong);color:var(--cyan);text-align:center;
  text-shadow:0 0 20px rgba(95,215,255,.4)}
.banner.warn{color:var(--amber);border-color:rgba(255,179,71,.5);text-shadow:0 0 20px rgba(255,179,71,.35)}
.banner.bad{color:var(--red);border-color:rgba(255,93,93,.5);text-shadow:0 0 20px rgba(255,93,93,.35)}
.banner.good{color:var(--green);border-color:rgba(110,242,164,.5);text-shadow:0 0 20px rgba(110,242,164,.35)}

.hud-bottom{position:absolute;left:14px;right:14px;bottom:max(14px,env(safe-area-inset-bottom));
  display:flex;align-items:flex-end;justify-content:space-between;gap:12px}
/* keeps the centre of the screen clear so the chase camera is not blocked */
.hud-right{display:flex;align-items:flex-end;gap:12px}
.telemetry{padding:12px 15px;min-width:250px;display:flex;flex-direction:column;gap:11px}
.readouts{display:grid;grid-template-columns:1fr 1fr;gap:6px 18px}
.readouts .r{display:flex;flex-direction:column;gap:1px}
.readouts label,.fuel label,.thr label{font-family:var(--mono);font-size:9px;letter-spacing:.16em;color:var(--txt-dim)}
.readouts span{font-family:var(--mono);font-size:16px;color:var(--txt)}
.readouts b{font-weight:600}
.readouts i{font-style:normal;font-size:10px;color:var(--txt-dim);margin-left:3px}
.telemetry .warning b{color:var(--red)}
.fuel{display:flex;align-items:center;gap:9px}
.fuel-bar{flex:1;height:8px;border-radius:99px;background:rgba(255,255,255,.10);overflow:hidden}
.fuel-fill{height:100%;width:100%;border-radius:99px;background:linear-gradient(90deg,var(--green),var(--cyan));transition:width .1s}
.fuel-fill.low{background:linear-gradient(90deg,var(--amber),var(--red))}
.fuel span{font-family:var(--mono);font-size:11px;color:var(--txt-dim);min-width:36px;text-align:right}
.thr{display:flex;align-items:center;gap:9px}
.thr-bar{flex:1;height:6px;border-radius:99px;background:rgba(255,255,255,.10);overflow:hidden}
.thr-fill{height:100%;width:0%;border-radius:99px;background:linear-gradient(90deg,var(--amber),#fff0c2)}

.guidance{padding:11px;display:flex;flex-direction:column;align-items:center;gap:9px}
#horizon{display:block;border-radius:8px}
.padinfo{font-family:var(--mono);font-size:11px;text-align:center;color:var(--txt-dim)}
.pad-line{display:flex;align-items:center;gap:6px;justify-content:center}
.pad-line b{color:var(--txt);font-size:14px}
.pad-line .dark{color:var(--txt);font-size:14px}
.pad-line .dot{width:7px;height:7px;border-radius:99px;background:var(--green);box-shadow:0 0 8px var(--green)}
.pad-line .bear{color:var(--amber);font-size:14px;display:inline-block;transition:transform .1s}
.pad-line.small{font-size:10px;color:var(--txt-dim);margin-top:2px}
.pad-line.small.ok{color:var(--green)}
.pad-line.small.bad{color:var(--red)}

.radar-panel{padding:11px;display:flex;flex-direction:column;align-items:center;gap:6px}
#radar{display:block}
.radar-label{font-family:var(--mono);font-size:9px;letter-spacing:.16em;color:var(--txt-dim)}

/* touch controls */
.touch{position:absolute;inset:0;pointer-events:none}
.stick{position:absolute;left:20px;bottom:150px;width:130px;height:130px;pointer-events:auto;touch-action:none}
.stick-ring{position:absolute;inset:0;border-radius:99px;border:1.5px solid var(--line-strong);
  background:radial-gradient(circle,rgba(20,30,48,.5),rgba(10,15,25,.28))}
.stick-knob{position:absolute;left:50%;top:50%;width:54px;height:54px;margin:-27px 0 0 -27px;border-radius:99px;
  background:radial-gradient(circle at 35% 30%,rgba(140,225,255,.9),rgba(40,140,190,.85));
  border:1px solid rgba(200,240,255,.6);box-shadow:0 0 18px rgba(95,215,255,.4);transition:transform .05s}
.touch-right{position:absolute;right:20px;bottom:150px;display:flex;align-items:center;gap:12px;pointer-events:auto}
.tbtn{border-radius:99px;border:1px solid var(--line-strong);background:var(--panel);color:var(--txt);
  cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;touch-action:none;
  backdrop-filter:blur(9px);font-size:22px}
.tbtn.thrust{width:96px;height:96px;background:radial-gradient(circle at 50% 70%,rgba(255,179,71,.28),rgba(20,25,38,.85));
  border-color:rgba(255,179,71,.55);font-size:30px;color:var(--amber)}
.tbtn.thrust small{font-family:var(--mono);font-size:8px;letter-spacing:.14em;color:var(--txt-dim);margin-top:2px}
.tbtn.small{width:52px;height:52px;font-size:20px}
.tbtn:active,.tbtn.active{transform:scale(.94);border-color:var(--cyan)}
.tbtn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* ---------------- Responsive ---------------- */
@media (max-width:1000px){
  .menu-grid{grid-template-columns:1fr;gap:26px}
  .controls-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .hud{padding:10px}
  .hud .panel{border-radius:10px}

  /* top bar: mission left, controls right, both compact */
  .hud-top{gap:8px}
  .mission{padding:7px 10px;max-width:44%}
  .mission-name{font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .mission-sub{font-size:9px;gap:8px;margin-top:3px}
  .hud-buttons{gap:5px}
  .icon-btn{min-width:40px;font-size:9.5px;padding:6px 8px;border-radius:9px}
  .icon-btn small{display:none}

  /* every readout moves to the top; the bottom of a phone belongs to the thumbs */
  .hud-bottom{top:78px;bottom:auto;left:10px;right:10px;align-items:flex-start;gap:8px}
  .hud-right{display:contents}
  .telemetry{padding:8px 10px;gap:7px;min-width:0;max-width:58%}
  .readouts{grid-template-columns:1fr 1fr;gap:3px 8px}
  .readouts span{font-size:12px}
  .readouts label{font-size:7.5px}
  .readouts i{font-size:8px}
  .fuel span{font-size:10px;min-width:30px}
  .guidance{padding:7px 9px;gap:0}
  #horizon{display:none}
  .padinfo{text-align:right}
  .pad-line b{font-size:13px}
  .pad-line.small{font-size:9.5px}
  .radar-panel{display:none}

  .hud-center{top:31%}
  .banner{font-size:13px;letter-spacing:.2em;padding:8px 14px}

  .manual-cols{grid-template-columns:1fr;gap:16px}
  .screen{padding:16px}
  .brand h1{font-size:clamp(30px,10vw,44px)}
}

/* landscape phones are short: keep the readouts high and the sticks low */
@media (max-height:560px) and (max-width:950px){
  .mission-name{font-size:9px}
  .icon-btn small{display:none}
  .hud-bottom{top:62px;bottom:auto;align-items:flex-start;gap:8px}
  .hud-center{top:40%}
  .telemetry{max-width:46%;padding:7px 9px;gap:5px}
  .readouts span{font-size:11px}
  #horizon{display:none}
  .radar-panel{display:none}
  .stick{width:104px;height:104px;bottom:92px;left:14px}
  .touch-right{right:14px;bottom:92px;gap:8px}
  .tbtn.thrust{width:72px;height:72px;font-size:24px}
  .tbtn.small{width:44px;height:44px;font-size:18px}
}
@media (max-width:420px){
  .readouts span{font-size:11px}
  .mission{max-width:40%}
  .icon-btn{min-width:36px;padding:6px 7px}
  .hud-bottom{top:74px}
  .telemetry{max-width:56%}
  .stick{width:112px;height:112px;bottom:132px;left:12px}
  .touch-right{right:12px;bottom:132px;gap:8px}
  .tbtn.thrust{width:80px;height:80px;font-size:26px}
  .tbtn.small{width:46px;height:46px;font-size:18px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}