/* Asteroid Blasters — engine styles.
   Rendering split: one <canvas> (#game-canvas) draws background/planet/asteroid rocks/cannon/
   lasers/particles every frame; DOM stays for text and controls (label plates, HUD, fire buttons,
   briefing/learning/game-over cards) so it's crisp and accessible. Slot colors (--slot1..4) are
   engine-owned — modes never choose category color, only which category is which slot index. */

:root {
  --bg:#0a0f1c; --panel:#111a2e; --panel2:#0b1626;
  --border:#25395a; --text:#c8d8e8; --dim:#93aac7;
  --chrome:#4A6FA5; --chrome-soft:rgba(74,111,165,.28);
  --slot1:#7CC7F0; --slot2:#F2A93C; --slot3:#E0A0CB; --slot4:#F2E96B;
  --danger:#FF5C72; --success:#5FE0A0;
  --mono:'Share Tech Mono',ui-monospace,'Courier New',monospace;
  --font:'Atkinson Hyperlegible',system-ui,sans-serif;
  --display:'Rajdhani',system-ui,sans-serif;
  --px:50px; --py:40px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{background:var(--bg);}
body.tlg-body{background:var(--bg);color:var(--text);font-family:var(--font);}
#ab-app{position:relative;}
button{font-family:var(--font);cursor:pointer;}
.ab-screen{display:none;}
.ab-screen.active{display:block;}
a.ab-link{color:var(--dim);text-decoration:none;font-family:var(--font);font-weight:600;}
a.ab-link:hover{color:var(--text);}

/* The site's floating Menu button has no positioning CSS of its own (it's normally static, at the
   very top of body flow, and site pages have no fixed full-screen sibling). This page's game
   screen is position:fixed with a high z-index and would otherwise sit visually on top of it, so
   this page alone lifts it above everything and keeps it out of the HUD's own reserved corner. */
.tlg-overlay{position:fixed;top:0;left:0;z-index:1200;}

/* ═══════════ START SCREEN: 1 subject → 2 topic (+ 3 leaderboard) ═══════════
   Same step names/numbering as Knowledge Keep's start screen. Both steps fit a 1366x657 Chromebook
   window without page scroll; narrower or shorter windows fall back to scrolling. */
#screen-select.active{display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:100dvh;padding:clamp(12px,2.4dvh,26px) 20px;
  background:radial-gradient(ellipse at 50% 0%,#111d38 0%,var(--bg) 70%);}
.ab-select-wrap{max-width:1180px;width:100%;}
.ab-select-badge{font-family:var(--mono);font-size:.95rem;color:var(--chrome);letter-spacing:2.5px;
  text-transform:uppercase;margin-bottom:2px;text-align:center;}
.ab-select-title{font-family:var(--display);font-size:clamp(1.7rem,4vw,2.4rem);font-weight:700;
  color:#fff;text-align:center;margin-bottom:4px;line-height:1.15;}
.ab-select-title em{color:var(--success);font-style:normal;}
.ab-select-sub{color:var(--dim);text-align:center;max-width:none;margin:0 auto clamp(12px,2.4dvh,24px);font-size:1.125rem;}
.ab-step[hidden]{display:none;}
.ab-step-heading{display:flex;align-items:center;gap:10px;font-family:var(--font);font-size:1.3rem;font-weight:700;
  color:#fff;margin-bottom:10px;min-width:0;}
.ab-step-num{flex:none;display:inline-grid;place-items:center;width:30px;height:30px;border-radius:7px;
  background:var(--success);color:#04150d;font-size:1.05rem;font-weight:700;box-shadow:0 3px 0 rgba(0,0,0,.35);}
.ab-step-subject{color:var(--dim);font-weight:700;}
.ab-step-subject::before{content:'·';margin-right:8px;}

/* Step 1: subject cards */
.ab-subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;}
.ab-subject-card{display:flex;flex-direction:column;align-items:flex-start;gap:12px;min-height:clamp(150px,30dvh,230px);
  padding:20px;text-align:left;background:var(--panel);border:2px solid var(--border);border-radius:12px;color:var(--text);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);}
.ab-subject-card:not(:disabled):hover,.ab-subject-card:focus-visible{transform:translateY(-2px);
  border-color:var(--subject-c);box-shadow:0 8px 22px rgba(0,0,0,.4);outline:none;}
.ab-subject-card:focus-visible{box-shadow:0 0 0 3px var(--success),0 8px 22px rgba(0,0,0,.4);}
.ab-subject-icon{display:grid;place-items:center;width:64px;height:64px;border-radius:12px;background:var(--subject-c);
  color:#fff;box-shadow:0 4px 0 rgba(0,0,0,.35);}
.ab-subject-icon svg{width:36px;height:36px;}
.ab-subject-name{font-family:var(--display);font-size:1.75rem;font-weight:700;color:#fff;line-height:1.1;margin-top:auto;}
.ab-subject-count{font-size:1.05rem;font-weight:700;color:var(--success);}
.ab-subject-card:disabled{cursor:not-allowed;opacity:.5;}
.ab-subject-card:disabled .ab-subject-icon{filter:grayscale(.8);}
.ab-subject-card:disabled .ab-subject-count{color:var(--dim);font-style:italic;}

/* Step 2: topics beside the leaderboard (column 3 in Knowledge Keep) */
.ab-topic-cols{display:grid;grid-template-columns:1fr;gap:18px;align-items:start;}
@media (min-width:900px){.ab-topic-cols{grid-template-columns:minmax(0,1fr) 400px;}}
.ab-step-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.ab-step-row .ab-step-heading{margin-bottom:0;}
.ab-back-btn{flex:none;display:inline-grid;place-items:center;width:38px;height:38px;border-radius:8px;
  background:var(--panel);border:1.5px solid var(--border);color:var(--text);transition:border-color .15s,color .15s;}
.ab-back-btn:hover,.ab-back-btn:focus-visible{border-color:var(--success);color:#fff;outline:none;}
.ab-back-btn svg{width:22px;height:22px;}
.ab-mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px;}
.ab-mode-card{position:relative;display:flex;flex-direction:column;background:var(--panel);border:1.5px solid var(--border);border-radius:10px;
  padding:12px 16px 12px;text-align:left;color:var(--text);cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);}
.ab-mode-card:hover,.ab-mode-card:focus-within{transform:translateY(-2px);border-color:var(--card-c1,var(--success));
  box-shadow:0 8px 22px rgba(0,0,0,.4);}
.ab-mode-card.lb-on{border-color:var(--success);}
.ab-mode-title{font-family:var(--display);font-size:1.25rem;font-weight:700;color:#fff;margin-bottom:2px;line-height:1.2;}
.ab-mode-subtitle{font-size:.95rem;color:var(--dim);margin-bottom:8px;}
.ab-mode-chips{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:8px;}
.ab-mode-chip{font-size:.82rem;font-weight:700;letter-spacing:.3px;padding:3px 9px;border-radius:10px;
  border:1.5px solid currentColor;white-space:nowrap;}
.ab-mode-stats{display:flex;justify-content:space-between;gap:10px;font-size:.95rem;color:var(--dim);
  border-top:1px solid var(--border);padding-top:8px;margin-top:auto;}
.ab-mode-stats b{color:var(--success);}
.ab-mode-actions{display:flex;gap:8px;margin-top:8px;}
.ab-mode-play,.ab-mode-lb{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;
  border-radius:7px;font-weight:700;font-size:1rem;padding:6px 12px;transition:background .15s,color .15s,border-color .15s;}
.ab-mode-play{flex:1 1 auto;background:var(--success);color:#04150d;border:none;font-family:var(--display);font-size:1.2rem;letter-spacing:.3px;}
.ab-mode-play svg{width:16px;height:16px;}
.ab-mode-play:hover{background:#82ecb8;}
.ab-mode-lb{flex:none;background:transparent;color:var(--text);border:1.5px solid var(--border);}
.ab-mode-lb:hover{border-color:var(--success);color:#fff;}
.ab-mode-lb[aria-pressed="true"]{border-color:var(--success);color:var(--success);background:rgba(95,224,160,.08);}
.ab-mode-play:focus-visible,.ab-mode-lb:focus-visible{outline:3px solid #fff;outline-offset:2px;}
.ab-lb-panel{background:var(--panel);border:1.5px solid var(--border);border-radius:10px;padding:14px 16px;min-width:0;}
.ab-lb-panel .ab-step-heading{margin-bottom:4px;}
.ab-lb-topic{font-family:var(--display);font-size:1.12rem;font-weight:700;color:var(--success);margin-bottom:8px;
  padding-bottom:8px;border-bottom:1px solid var(--border);}
.ab-lb-body .lb-row{font-size:.95rem;padding:4px 6px;gap:7px;}
.ab-lb-body .lb-country{max-width:88px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ab-select-foot{margin-top:clamp(8px,1.6dvh,20px);text-align:center;}

/* ═══════════ BRIEFING ═══════════ */
#screen-briefing.active{display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:100dvh;overflow:hidden;padding:clamp(10px,2dvh,22px) 20px;
  background:radial-gradient(ellipse at 50% 60%,#111d38 0%,var(--bg) 75%);}
.ab-brief-card{max-width:1040px;width:100%;max-height:100%;overflow-y:auto;background:var(--panel);
  border:1px solid var(--border);border-radius:8px;padding:clamp(14px,2.4dvh,26px) clamp(18px,3vw,34px);}
.ab-brief-head{margin-bottom:10px;}
.ab-brief-badge{font-family:var(--mono);font-size:.9rem;color:var(--chrome);letter-spacing:2.5px;
  text-transform:uppercase;margin-bottom:5px;}
.ab-brief-title{font-family:var(--display);font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:#fff;
  line-height:1.1;margin-bottom:3px;}
.ab-brief-sub{font-size:.95rem;letter-spacing:.5px;color:var(--dim);text-transform:uppercase;
  border-bottom:1px solid var(--border);padding-bottom:9px;}
.ab-brief-cols{display:grid;grid-template-columns:1fr;gap:16px;margin-top:12px;}
@media (min-width:860px){.ab-brief-cols{grid-template-columns:1.15fr .85fr;align-items:start;}}
.ab-brief-body{font-size:1.125rem;line-height:1.55;margin-bottom:12px;}
.ab-brief-body p{margin-bottom:7px;}
.ab-cat-ref{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:7px;}
.ab-cat-box{display:flex;align-items:center;gap:9px;padding:8px 11px;border-radius:6px;font-size:.98rem;line-height:1.4;
  background:rgba(255,255,255,.04);border:1.5px solid var(--cat-c,var(--chrome));}
.ab-cat-box .glyph{flex:none;width:28px;height:28px;}
.ab-cat-box b{display:block;font-size:1.02rem;color:var(--cat-c,#fff);}
.ab-cat-box span{color:var(--dim);font-size:.88rem;}
.ab-rules-box{background:rgba(74,111,165,.08);border:1px solid var(--chrome-soft);
  border-radius:6px;padding:12px 15px;font-size:1.125rem;}
.ab-rules-box .rh{color:var(--chrome);font-size:.85rem;letter-spacing:1.5px;text-transform:uppercase;
  font-weight:700;display:block;margin-bottom:6px;}
.ab-rules-box ul{padding-left:18px;line-height:1.65;}
.ab-rules-box li{color:var(--text);margin-bottom:2px;}
.ab-rules-box li:last-child{margin-bottom:0;}
.ab-rules-box strong{color:var(--success);}
.ab-start-btn{width:100%;padding:13px;margin-top:12px;background:var(--success);color:#04150d;border:none;
  border-radius:5px;font-family:var(--display);font-size:1.35rem;font-weight:700;letter-spacing:.5px;
  transition:opacity .15s;}
.ab-start-btn:hover{opacity:.88;}
.ab-brief-changerow{margin-top:10px;text-align:center;}

/* ═══════════ GAME SCREEN ═══════════ */
#game-screen{flex-direction:column;position:fixed;inset:0;width:auto;height:100dvh;overflow:hidden;
  z-index:1000;background:var(--bg);}
#game-screen.active{display:flex;}
#game-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1;display:block;}

/* HUD: one compact row, reserves room for the site's Menu button (top-left) and the audio toggles
   (top-right), and wraps its stat chips rather than colliding with either at 1280px. */
#game-hud{position:absolute;top:0;left:0;right:0;min-height:54px;z-index:40;
  background:rgba(10,17,32,.88);border-bottom:1px solid var(--border);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;
  padding:8px 176px 8px 76px;font-family:var(--mono);backdrop-filter:blur(4px);}
/* margin-left: the site Menu button (~113px wide incl. its logo) overlaps the HUD's 76px left padding.
   flex-basis 0: a long mode title truncates with an ellipsis instead of wrapping the chips to a 2nd row. */
.hud-brand{color:var(--chrome);font-size:1.05rem;font-weight:700;letter-spacing:1px;flex:1 1 0;min-width:0;margin-left:48px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.hud-brand b{color:#fff;}
.stat-chip{background:rgba(95,224,160,.08);border:1px solid rgba(95,224,160,.28);
  padding:4px 11px;border-radius:3px;color:var(--success);white-space:nowrap;font-size:1.125rem;font-weight:700;}
.stat-chip b{color:#fff;}
.err-chip{background:rgba(255,92,114,.08);border-color:rgba(255,92,114,.3);color:var(--danger);}
.err-chip b{color:#fff;}
.shield-chip{background:rgba(74,111,165,.1);border-color:var(--chrome-soft);color:var(--chrome);}
.seg{display:inline-block;width:14px;height:10px;margin-left:3px;background:var(--chrome);
  border-radius:2px;transition:background .2s,opacity .2s;}
.seg.off{background:#233858;opacity:.55;}
.shield-chip.hit{animation:chip-hit .5s ease-out;}
@keyframes chip-hit{0%,60%{background:rgba(255,92,114,.45);}100%{background:rgba(74,111,165,.1);}}
.hud-tools{display:flex;gap:6px;position:absolute;top:8px;right:12px;z-index:41;}
.hud-tool-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  background:rgba(255,255,255,.05);border:1px solid var(--border);border-radius:4px;color:var(--dim);
  transition:color .15s,border-color .15s;padding:0;}
.hud-tool-btn:hover{color:var(--text);border-color:var(--chrome);}
.hud-tool-btn[aria-pressed="false"]{color:#5a708f;}
.hud-tool-btn svg{width:18px;height:18px;}

/* Game area: everything below the HUD (HUD is a fixed 54px single row at target widths — see the
   mobile breakpoint below for the shorter/narrower case). Canvas fills it at (0,0)-local; DOM
   label plates/FX overlay on top using those same local coordinates. */
#game-area{position:absolute;top:54px;left:0;right:0;bottom:0;z-index:10;cursor:default;touch-action:manipulation;}
/* During active play the canvas crosshair replaces the cursor (engine.js toggles .aiming off for
   pause, the learn card and game over, which brings the normal cursor back). */
#game-area.aiming,#game-area.aiming *{cursor:none;}
#ab-crosshair{position:absolute;left:0;top:0;width:64px;height:64px;z-index:36;pointer-events:none;will-change:transform;}
#ab-crosshair[hidden]{display:none;}
#game-area.shake{animation:shake .24s linear;}
@keyframes shake{0%,100%{transform:translate(0,0);}25%{transform:translate(-3px,2px);}
  50%{transform:translate(3px,-2px);}75%{transform:translate(-2px,-1px);}}
#game-area.paused .lc-bar i{animation-play-state:paused;}

#danger-vignette{position:absolute;inset:0;pointer-events:none;z-index:15;opacity:0;
  box-shadow:inset 0 0 70px 10px rgba(255,92,114,.4);transition:opacity .3s;}
#danger-vignette.on{opacity:.55;}
#slow-tint{position:absolute;inset:0;pointer-events:none;z-index:14;opacity:0;transition:opacity .3s;
  background:radial-gradient(circle at 50% 50%,transparent 35%,rgba(124,199,240,.22));}
#slow-tint.on{opacity:1;}
#slow-hud{position:absolute;top:64px;left:50%;transform:translateX(-50%);z-index:45;display:none;
  font-size:.98rem;font-weight:700;color:#bfe0ff;background:rgba(124,199,240,.14);
  border:1px solid rgba(124,199,240,.5);padding:4px 14px;border-radius:14px;pointer-events:none;white-space:nowrap;}
#slow-hud.on{display:block;}

/* Asteroid: DOM wrapper positions the plate + tags; the rock body itself is canvas-drawn at the
   same coordinates each frame (see engine.js render()). The plate never rotates. */
.asteroid{position:absolute;left:0;top:0;user-select:none;-webkit-user-select:none;
  will-change:transform;touch-action:manipulation;z-index:3;opacity:1;transition:opacity .3s ease-out;}
.asteroid.dying{opacity:0;pointer-events:none;}
.ab-inline-icon{vertical-align:-2px;flex:none;}
.ast-plate{position:relative;pointer-events:auto;cursor:pointer;text-align:center;
  padding:7px 11px 9px;border-radius:10px;border:2px solid rgba(150,190,240,.4);
  background:linear-gradient(180deg,rgba(9,16,30,.94),rgba(5,10,20,.96));
  box-shadow:0 2px 10px rgba(0,0,0,.55);
  transition:border-color .2s,box-shadow .2s,background-color .2s,transform .12s;}
.ast-name{font-family:var(--font);font-size:1.375rem;font-weight:700;color:#fff;line-height:1.15;margin-bottom:2px;}
.ast-line1{font-family:var(--font);font-size:1.125rem;font-weight:600;color:#eef5ff;line-height:1.25;}
.ast-line2{font-family:var(--font);font-size:1.125rem;font-weight:600;color:var(--success);line-height:1.25;}
.ast-struct{display:flex;justify-content:center;margin-bottom:3px;}
.ast-struct svg{width:78px;height:78px;filter:drop-shadow(0 1px 3px rgba(0,0,0,.8));}
.ast-struct svg.wide{width:176px;height:72px;}
.asteroid.power .ast-plate{border-color:#e8c96a;}
.asteroid.danger .ast-plate{border-color:var(--danger);
  box-shadow:0 0 0 3px rgba(255,92,114,.28),0 0 16px rgba(255,92,114,.6),0 2px 10px rgba(0,0,0,.55);}
.asteroid.wrong .ast-plate{border-color:var(--danger);box-shadow:0 0 14px rgba(255,92,114,.7);}
/* Under the crosshair: brighter border and a slight scale-up (no scale with reduced motion). */
.ast-plate{transform-origin:50% 50%;}
.asteroid.hovered .ast-plate{border-color:#fff;transform:scale(1.04);transition:border-color .12s,box-shadow .2s,transform .12s;}

.ast-tag{position:absolute;left:50%;transform:translate(-50%,-50%);z-index:5;display:none;
  font-family:var(--mono);font-size:.76rem;font-weight:700;letter-spacing:1.2px;white-space:nowrap;
  padding:2px 9px;border-radius:9px;pointer-events:none;color:#04150d;background:var(--success);}
.ast-tag.top{top:0;}
.ast-tag.bot{top:100%;background:#e8c96a;color:#2a1e00;}
.asteroid.danger .ast-tag.top{display:block;}
.asteroid.danger .ast-tag.top{background:var(--danger);color:#fff;}
.asteroid.power .ast-tag.bot{display:block;}

/* Level-up banner */
#sector-banner{position:absolute;left:0;right:0;top:26%;text-align:center;z-index:65;pointer-events:none;opacity:0;
  padding:12px 0 8px;background:linear-gradient(90deg,transparent,rgba(10,15,28,.8) 20%,rgba(10,15,28,.8) 80%,transparent);}
#sector-banner .sb-t{font-family:var(--display);font-size:clamp(2rem,7vw,3.6rem);font-weight:700;letter-spacing:.25em;
  padding-left:.25em;color:#fff;text-shadow:0 0 20px var(--chrome),0 0 44px var(--chrome);}
#sector-banner .sb-s{color:var(--chrome);letter-spacing:1px;font-size:1rem;font-weight:700;padding:0 10px;}
#sector-banner.go{animation:sb 1.9s var(--ease) forwards;}
@keyframes sb{0%{opacity:0;transform:scale(1.15);}14%{opacity:1;transform:scale(1);}72%{opacity:1;}100%{opacity:0;transform:scale(.98);}}

/* Learning card after a wrong answer */
#learn-dim{position:absolute;inset:0;z-index:70;display:none;align-items:center;justify-content:center;
  padding:14px;background:rgba(6,10,20,.62);cursor:default;}
#learn-dim.ready{cursor:pointer;}
#learn-dim.show{display:flex;}
#learn-card{width:min(600px,100%);max-height:100%;overflow-y:auto;background:rgba(10,17,32,.98);
  border:2px solid var(--danger);border-radius:10px;padding:16px 20px 12px;
  box-shadow:0 0 34px rgba(255,92,114,.32),0 10px 34px rgba(0,0,0,.55);
  animation:card-in .2s var(--ease);}
@keyframes card-in{from{opacity:0;transform:translateY(10px) scale(.98);}to{opacity:1;transform:none;}}
.lc-h{display:flex;align-items:center;gap:7px;color:var(--danger);letter-spacing:.5px;font-weight:700;
  font-size:.95rem;text-transform:uppercase;margin-bottom:7px;}
.lc-t{font-family:var(--display);font-size:1.4rem;font-weight:700;color:#fff;line-height:1.25;margin-bottom:8px;}
.lc-s{font-size:1.125rem;font-weight:500;color:var(--text);line-height:1.5;}
.lc-bar{height:6px;background:rgba(255,255,255,.1);margin-top:14px;border-radius:3px;overflow:hidden;}
.lc-bar i{display:block;height:100%;width:100%;background:var(--chrome);transform-origin:left;transform:scaleX(0);
  transition:transform .2s linear;}
#learn-dim.ready .lc-bar i{background:var(--success);}
.lc-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px;flex-wrap:wrap;}
.lc-f{color:var(--dim);font-size:.95rem;}
.lc-continue{min-width:190px;min-height:44px;padding:8px 18px;border-radius:7px;border:2px solid var(--success);
  background:var(--success);color:#04150d;font-family:var(--display);font-size:1.2rem;font-weight:700;letter-spacing:.3px;
  font-variant-numeric:tabular-nums;transition:background .15s,opacity .15s;}
.lc-continue:disabled{background:transparent;border-color:#3a4d6c;color:#8093ae;cursor:not-allowed;}
.lc-continue:not(:disabled):hover{background:#82ecb8;}
.lc-continue:focus-visible{outline:3px solid #fff;outline-offset:2px;}

/* Floating score text — positioned local to #game-area (canvas-local coords), not the page. */
.float-txt{position:absolute;z-index:32;pointer-events:none;font-weight:700;font-size:1.3rem;
  text-shadow:0 1px 3px rgba(0,0,0,.85);transform:translate(-50%,-50%);animation:floatup .9s ease-out forwards;}
@keyframes floatup{to{transform:translate(-50%,-130px);opacity:0;}}

/* Feedback banner */
#feedback-banner{position:absolute;top:62px;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:7px;
  font-size:1.05rem;font-weight:700;padding:7px 18px;border-radius:5px;
  white-space:nowrap;z-index:45;pointer-events:none;max-width:96vw;overflow:hidden;text-overflow:ellipsis;
  transition:opacity .3s;opacity:0;}
#feedback-banner:empty{display:none;}
#feedback-banner.show-ok{background:rgba(95,224,160,.12);border:1px solid rgba(95,224,160,.35);
  color:var(--success);opacity:1;}
#feedback-banner.show-err{background:rgba(255,92,114,.12);border:1px solid rgba(255,92,114,.35);
  color:var(--danger);opacity:1;}

/* Streak / combo */
#combo{position:absolute;bottom:calc(var(--fire-h,110px) + 30px);left:50%;transform:translateX(-50%);
  z-index:33;pointer-events:none;font-size:1rem;font-weight:700;color:#e8c96a;white-space:nowrap;
  background:rgba(10,17,32,.85);border:1px solid rgba(232,201,106,.4);border-radius:5px;
  padding:5px 12px;opacity:0;transition:opacity .2s;}
#combo.on{opacity:1;}
#combo b{color:#fff;}
#combo span{color:var(--dim);font-size:.82rem;font-weight:600;}
#combo.x2{border-color:#e8b23a;box-shadow:0 0 12px rgba(232,178,58,.3);}
#combo.x3{border-color:#e88a3a;color:#f0a96a;box-shadow:0 0 14px rgba(232,138,58,.4);}
#combo.lost{color:var(--danger);border-color:var(--danger);box-shadow:none;}
#combo.pop{animation:cpop .22s var(--ease);}
@keyframes cpop{0%{transform:translateX(-50%) scale(1.25);}100%{transform:translateX(-50%) scale(1);}}

/* Fire buttons: generated, must lay out well at 2-4, in category order. */
#fire-btns{position:absolute;bottom:14px;left:0;right:0;display:flex;justify-content:center;
  flex-wrap:wrap;gap:14px;z-index:50;padding:0 16px;}
.fire-btn{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:7px 19px;border:3px solid transparent;border-radius:8px;background:var(--btn-c);color:#04101c;
  transition:transform .12s,box-shadow .15s,opacity .1s,filter .12s;flex:1 1 auto;min-width:150px;max-width:260px;}
.fire-btn:hover{box-shadow:0 6px 26px var(--btn-shadow);}
.fire-btn:active{transform:scale(.96);}
/* Blaster selection: cards only arm (keys 1-N, click/tap, mouse wheel); the armed one is raised,
   glows in its slot color and has a white border + ARMED label; the rest dim but stay readable. */
.fire-btn:not(.armed){filter:brightness(.72) saturate(.75);}
.fire-btn:not(.armed):hover{filter:brightness(.88) saturate(.9);}
.fire-btn.armed{border-color:#fff;transform:translateY(-8px);
  box-shadow:0 0 0 2px rgba(4,16,28,.6),0 0 22px var(--btn-glow),0 8px 26px var(--btn-shadow);}
.fire-btn.armed:active{transform:translateY(-8px) scale(.97);}
.fb-armed{display:none;position:absolute;top:-11px;left:50%;transform:translateX(-50%);
  font-family:var(--mono);font-size:.72rem;font-weight:700;letter-spacing:1.5px;line-height:1;
  padding:3px 8px;border-radius:8px;background:#fff;color:#04101c;white-space:nowrap;pointer-events:none;}
.fire-btn.armed .fb-armed{display:block;}
.fb-badge{display:flex;align-items:center;gap:6px;}
.fb-badge .glyph{width:26px;height:26px;flex:none;}
.fb-badge b{font-family:var(--display);font-size:1.5rem;font-weight:700;color:#04101c;}
.fire-btn .fb-label{font-size:1.25rem;font-weight:700;letter-spacing:.2px;}
.fire-btn small{font-size:.94rem;font-weight:600;opacity:.85;}
.fire-btn kbd{display:none;}
.fire-btn:disabled{opacity:.4;cursor:default;}

.life-icon{font-size:1.1rem;line-height:1;}
.life-icon.lost{opacity:.25;}

#pause-overlay{position:absolute;inset:0;z-index:68;display:none;align-items:center;justify-content:center;
  background:rgba(6,10,20,.55);cursor:pointer;}
#pause-overlay:not([hidden]){display:flex;}
.pause-card{background:rgba(10,17,32,.96);border:1px solid var(--border);border-radius:8px;
  padding:14px 22px;font-size:1.1rem;font-weight:700;color:#fff;}
#debug-hud{position:absolute;top:60px;left:8px;z-index:80;background:rgba(6,10,20,.85);
  border:1px solid var(--border);border-radius:4px;padding:6px 10px;font-family:var(--mono);
  font-size:.85rem;color:var(--success);white-space:pre;pointer-events:none;}
#debug-hud:not([hidden]){display:block;}

@media (max-width:560px){
  #game-hud{padding:6px 96px 6px 64px;gap:6px;}
  .hud-brand{display:none;}
  .stat-chip{padding:3px 8px;font-size:.95rem;}
  .seg{width:10px;height:9px;margin-left:2px;}
  .hud-tools{top:6px;right:8px;}
  .hud-tool-btn{width:30px;height:30px;}
  #fire-btns{bottom:10px;gap:8px;padding:0 8px;}
  .fire-btn{flex:1 1 42%;max-width:190px;min-width:0;padding:8px 6px;}
  .fb-badge b{font-size:1.2rem;}
  .fire-btn .fb-label{font-size:1.05rem;}
  .fire-btn small{font-size:.85rem;}
  #combo{bottom:calc(var(--fire-h,150px) + 20px);}
  #combo span{display:none;}
  .lc-t{font-size:1.2rem;}
  #feedback-banner{font-size:.92rem;padding:6px 10px;}
  .ab-brief-card,.go-card{padding:18px 16px;}
}
@media (prefers-reduced-motion: reduce){
  #danger-vignette.on{animation:none !important;}
  .float-txt,#sector-banner.go{animation-duration:.001s !important;}
  #game-area.shake{animation:none !important;}
  .asteroid.hovered .ast-plate{transform:none;}
  .fire-btn{transition:none;}
}

/* ═══════════ GAME OVER ═══════════ */
#screen-gameover.active{display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:100dvh;overflow:hidden;padding:clamp(10px,2dvh,22px) 20px;background:var(--bg);}
.go-card{max-width:920px;width:100%;max-height:100%;overflow-y:auto;background:var(--panel);
  border:1px solid var(--border);border-radius:8px;padding:clamp(14px,2.2dvh,24px) clamp(18px,3vw,28px);}
.go-badge{font-family:var(--mono);font-size:.9rem;letter-spacing:2.5px;
  color:var(--chrome);text-transform:uppercase;margin-bottom:5px;}
.go-title{font-family:var(--display);font-size:1.7rem;font-weight:700;color:#fff;margin-bottom:3px;}
.go-sub{font-size:1.05rem;margin-bottom:14px;display:flex;flex-wrap:wrap;gap:5px 14px;}
.go-sub b{color:var(--success);}
.go-cols{display:grid;grid-template-columns:1fr;gap:16px;}
@media (min-width:820px){.go-cols{grid-template-columns:1.2fr .8fr;align-items:start;}}
.lesson-box{background:var(--panel2);border:1px solid rgba(95,224,160,.15);
  border-radius:5px;padding:13px 15px;font-size:1.125rem;line-height:1.6;}
.lh{color:var(--chrome);font-weight:700;letter-spacing:.5px;}
.lv{color:var(--success);font-weight:700;}
.le{color:var(--danger);font-weight:700;}
.miss{border-left:3px solid #7a8aa0;margin:9px 0 0;
  padding:7px 11px;font-size:1.125rem;line-height:1.4;color:var(--text);background:rgba(255,255,255,.03);}
.miss-h{font-weight:700;font-size:1.12rem;color:#fff;}
.miss-tag{font-size:.8rem;font-weight:700;letter-spacing:.5px;padding:1px 8px;border-radius:9px;
  margin-left:6px;vertical-align:middle;color:#04101c;}
.miss-s{color:var(--success);font-weight:600;}
.miss-w{color:#ff8a95;font-weight:600;}
.miss-r{color:var(--dim);}
.lb-box{margin-top:0;}
.lb-title{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:7px;display:flex;align-items:center;gap:7px;}
.lb-row{display:flex;gap:9px;align-items:center;padding:5px 7px;white-space:nowrap;
  border-bottom:1px solid rgba(37,57,90,.5);font-size:1rem;}
.lb-row.hi{background:rgba(95,224,160,.08);color:var(--success);}
.lb-med{min-width:24px;font-weight:700;}
.lb-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.lb-country{color:var(--dim);font-size:.85rem;}
.lb-pts{flex:none;}
.lb-empty,.lb-note{color:var(--dim);font-size:.98rem;padding:5px 0;}
.lb-you{margin-top:6px;color:var(--dim);font-size:.95rem;}
.lb-celebrate{display:flex;align-items:center;gap:6px;background:rgba(232,201,106,.12);border:1px solid rgba(232,201,106,.4);color:#e8c96a;
  border-radius:5px;padding:6px 10px;margin-bottom:8px;font-size:.95rem;font-weight:700;}
.lb-signin{margin-top:6px;font-size:.95rem;}
.lb-signin a{color:var(--success);font-weight:700;}
.again-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px;}
.again-btn{flex:1 1 auto;min-width:160px;padding:12px;background:transparent;border:1.5px solid var(--chrome);
  color:var(--chrome);border-radius:5px;font-family:var(--display);font-size:1.2rem;font-weight:700;letter-spacing:.5px;
  cursor:pointer;transition:background .15s,color .15s;}
.again-btn:hover{background:var(--chrome);color:#fff;}
.again-btn.primary{border-color:var(--success);color:var(--success);}
.again-btn.primary:hover{background:var(--success);color:#04150d;}
.go-foot{margin-top:12px;text-align:center;}

/* The player's avatar standing on the planet (review games only; shared/avatar/). 32x32 at x3, never smoothed. */
.ab-pilot{position:absolute;left:clamp(10px,3vw,40px);bottom:clamp(64px,12vh,110px);width:96px;height:96px;pointer-events:none;z-index:2;filter:drop-shadow(0 3px 4px rgba(0,0,0,.55));}
.ab-pilot canvas{width:96px;height:96px;image-rendering:pixelated;}
@media (max-height:520px){.ab-pilot{display:none;}}
/* Gear (Avatar Phase 5): the perk line, top right of the field. */
.ab-perk-hud{position:absolute;top:12px;right:12px;z-index:46;max-width:min(560px,70%);flex-wrap:wrap;}