/* ── Circuit Breaker - soldermask, copper & silkscreen ─────────────────
   Material system: the chrome is itself a PCB. Warm metals (copper rails,
   ENIG-gold pads) carry structure and economy; silkscreen white carries
   text; cyan is reserved for live signal data. Corners are chamfered like
   routed board edges, never rounded. */

:root {
  --mask: #0A1310;          /* bare soldermask (page) */
  --mask-2: #0E1B16;        /* panel fill */
  --mask-3: #14241D;        /* raised module */
  --line: #21372C;          /* hairline rules */
  --copper: #B96F35;        /* structural traces */
  --copper-lit: #E29A55;    /* trace highlight */
  --gold: #E8C468;          /* ENIG pads, credits, primary actions */
  --gold-ink: #241A05;      /* text on gold */
  --silk: #E9F4EE;          /* silkscreen white */
  --dim: #7DA294;           /* silkscreen 50% */
  --signal: #35E0FF;        /* live data only */
  --ok: #4DF0A6;
  --fault: #FF4D5E;

  --f-disp: 'Chakra Petch', 'Segoe UI', system-ui, sans-serif;
  --f-mono: 'Kode Mono', Consolas, 'Courier New', monospace;

  --notch: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  --notch-sm: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);

  /* whole-UI magnification: menus and HUD read better a notch larger.
     every viewport-sized dimension divides by this so nothing overflows */
  --ui-zoom: 1.1;

  /* sidebar width reservation - fitBoard() reads this live, so keep the
     JS and CSS agreeing by only ever changing it here */
  --sidebar-min: 340px;
}

/* smaller viewports: drop the magnification and slim the sidebar so the
   board keeps the lion's share of the width */
@media (max-width: 1360px), (max-height: 820px) {
  :root { --ui-zoom: 1; }
}
@media (max-width: 1280px) {
  :root { --sidebar-min: 300px; }
}
@media (max-width: 1100px) {
  :root { --sidebar-min: 270px; }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  height: 100%;
}

html, body {
  background: var(--mask);
  color: var(--silk);
  font-family: var(--f-disp);
}

/* faint copper fabrication grid; flex centers the game in the viewport */
body {
  min-height: 100%;
  display: flex;
  background-image:
    linear-gradient(rgba(185, 111, 53, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 111, 53, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* one chassis: every game module lives inside this full-viewport frame */
#app {
  /* transform (not zoom) so the magnification works in every browser;
     the box is laid out smaller by the same factor, then scaled up from
     the top-left corner to land exactly on the viewport edges */
  transform: scale(var(--ui-zoom));
  transform-origin: 0 0;
  width: calc(100% / var(--ui-zoom));
  height: calc(100vh / var(--ui-zoom));
  min-height: calc(560px / var(--ui-zoom));
  display: flex;
  flex-direction: column;
  padding: 10px 14px 14px;
  user-select: none;
}

/* ── HUD bar: instrument readout strip, mounted inside the board frame
   (a flex row above the canvas, so overlays blur it along with the game) */
#hud-bar {
  flex: 0 0 auto;
  min-height: 52px;
  display: grid;
  /* left controls | integrity | run controls: the fr pair stays equal,
     so INTEGRITY sits on the frame's true centerline - the same line
     the wave banner below it centers on */
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 4px 12px;
  background: linear-gradient(180deg, var(--mask-2), #050D0B);
  border-bottom: 1px solid rgba(185, 111, 53, 0.5);
}

/* the two wings flanking the centered integrity block; on tiny frames
   they wrap internally and fitBoard() measures the taller bar */
.hud-side {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px 10px;
  min-width: 0;
}
.hud-right { justify-content: flex-end; }

.readout {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 3px 16px;
}
.ro-label {
  font: 600 9px/1 var(--f-disp);
  letter-spacing: 2.2px;
  color: var(--dim);
}
.ro-num {
  font: 600 19px/1 var(--f-mono);
  color: var(--silk);
  font-variant-numeric: tabular-nums;
}
.ro-credits .ro-num { color: var(--gold); }
.ro-wave .ro-num { color: var(--signal); }

/* integrity stands alone at the bar's center - the run's vital sign */
.ro-lives {
  padding: 3px 22px;
  align-items: center;
}
.ro-lives .ro-label { font-size: 11px; letter-spacing: 3px; }
.ro-lives.low .ro-label { color: var(--fault); }

/* the signature: 20 gold pads that burn out as integrity drains */
.pads { display: flex; gap: 3px; margin-top: 3px; }
.pads span {
  width: 10px;
  height: 5px;
  background: var(--gold);
  box-shadow: 0 0 4px rgba(232, 196, 104, 0.55);
  transition: background 0.25s, box-shadow 0.25s;
}
.pads span.out {
  background: #38181C;
  box-shadow: none;
}

.readout.flash { animation: padburn 0.45s; }
@keyframes padburn {
  0%   { background: rgba(255, 77, 94, 0.22); }
  100% { background: transparent; }
}

/* menu screens: the whole readout bar powers down (visibility keeps the
   frame layout identical) - only the meta gold count stays lit, floating
   at the board's top-left above the overlay blur */
#app.menu #hud-bar { visibility: hidden; }
/* mid-run the meta gold count is meaningless - its HUD slot hosts the
   settings button instead; the chip only surfaces on the menu screens */
#app:not(.menu) #hud-bar .ro-gold { display: none; }
#btn-settings { font-size: 19px; padding: 6px 13px; line-height: 1; }
#app.menu #hud-bar .ro-gold {
  visibility: visible;
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 20;   /* above the menu overlays (z 10), like the toast */
  padding: 10px 16px;
  background: var(--mask-3);
  border: 1px solid rgba(232, 196, 104, 0.4);
  clip-path: var(--notch-sm);
}
/* the sector roulette runs while #app is still on the menu, so the gold chip
   would hang over a board mid-shuffle - clear the frame for the scan */
#app.scanning #hud-bar .ro-gold { display: none; }
.ro-gold .ro-num { color: var(--gold); }

/* ── buttons: gold pads & silkscreen outlines ─────────────────────── */
.btn {
  font: 600 13px/1 var(--f-disp);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--silk);
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  padding: 11px 16px;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) {
  border-color: var(--copper-lit);
  color: var(--gold);
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.35; cursor: default; }
.btn:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(180deg, #F2D389, #D5AA4C);
  border: none;
  color: var(--gold-ink);
  font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5), inset 0 -2px 0 rgba(120, 80, 10, 0.35);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(180deg, #FBE09C, #E0B65A);
  color: var(--gold-ink);
}
.btn-primary.ready { animation: padpulse 1.5s infinite; }
@keyframes padpulse {
  0%, 100% { box-shadow: inset 0 1px 0 rgba(255,255,255,0.5), 0 0 4px rgba(232, 196, 104, 0.25); }
  50%      { box-shadow: inset 0 1px 0 rgba(255,255,255,0.5), 0 0 20px rgba(232, 196, 104, 0.6); }
}

#btn-wave { min-width: 172px; }
.btn-util {
  font-family: var(--f-mono);
  font-size: 12px;
  min-width: 52px;
  padding: 11px 10px;
  text-align: center;
}

.btn-big { font-size: 15px; padding: 15px 30px; }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── audio trimmers: SFX / MUSIC sliders (settings screen) ────────── */
.vol-row {
  display: grid;
  grid-template-columns: 40px 104px 26px;
  align-items: center;
  gap: 8px;
}
.vol-label {
  font: 600 9px/1 var(--f-disp);
  letter-spacing: 2px;
  color: var(--dim);
}
.vol-num {
  font: 600 12px/1 var(--f-mono);
  color: var(--gold);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* the sliders read as trim pots: copper fill up to the wiper, gold pad thumb */
.vol-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg,
    var(--copper-lit) 0 var(--fill, 50%),
    var(--line) var(--fill, 50%));
  cursor: pointer;
  outline: none;
}
.vol-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  background: var(--gold);
  box-shadow: 0 0 5px rgba(232, 196, 104, 0.55);
  border: none;
}
.vol-row input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 0;
  background: var(--gold);
  box-shadow: 0 0 5px rgba(232, 196, 104, 0.55);
  border: none;
}
.vol-row input[type="range"]:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ── layout ───────────────────────────────────────────────────────── */
#main {
  flex: 1;
  min-height: 0;
  display: flex;
  gap: 14px;
}

/* menu screens don't deal in components: drop the sidebar and center
   the board (it keeps its in-game size, so PLAY causes no resize jump) */
#app.bare #sidebar { display: none; }
#app.bare #main { justify-content: center; }

/* the board letterboxes into whatever space the chassis gives it;
   it sizes to the canvas, and the sidebar absorbs the leftover width */
#board {
  flex: 0 0 auto;
  min-width: 0;
  min-height: 0;
  display: flex;
}

/* sized in px by fitBoard() in main.js - exact letterbox, no distortion;
   pinned top-left so the frame lines up with the header and sidebar */
#canvas-wrap {
  position: relative;
  margin: 0 auto auto 0;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--copper);
  background: #050A08;
  box-shadow: 0 0 0 1px rgba(185, 111, 53, 0.15), 0 6px 32px rgba(0, 0, 0, 0.55);
  /* the HUD and every overlay size themselves against the frame's real
     width (@container / cqw below), not the viewport - the frame can be
     narrow on a huge monitor whenever height is the binding constraint */
  container-type: inline-size;
}

canvas#game {
  display: block;
  width: 100%;
  flex: 1;
  min-height: 0;
  cursor: crosshair;
}

/* ── sidebar: modules on a copper trace spine ─────────────────────── */
#sidebar {
  flex: 1;
  min-width: var(--sidebar-min, 340px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow-y: auto;
  scrollbar-width: thin;
}
/* the spine itself */
#sidebar::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--copper-lit) 6%, var(--copper-lit) 94%, transparent);
}

.panel {
  background: var(--mask-2);
  border: 1px solid var(--line);
  clip-path: var(--notch);
  padding: 11px 13px 13px;
  position: relative;
}
/* via connecting each module to the spine */
.panel::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 2px;
  background: var(--copper);
}
.panel::after {
  content: '';
  position: absolute;
  left: -13px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--mask);
  box-shadow: 0 0 5px rgba(232, 196, 104, 0.5);
}

.panel h2 {
  font: 700 10.5px/1 var(--f-disp);
  letter-spacing: 2.5px;
  color: var(--dim);
  margin-bottom: 10px;
}
.dim { color: var(--dim); font-size: 12px; }

/* shop cards: component footprints */
#shop { display: flex; flex-direction: column; gap: 8px; }

.card {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  grid-template-rows: auto auto;
  gap: 1px 10px;
  align-items: center;
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  padding: 7px 10px;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
  position: relative;
}
.card:hover { border-color: var(--copper); }
.card.active {
  border-color: var(--gold);
  background: #1B2B21;
}
.card.active::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 14px 14px 0;
  border-color: transparent var(--gold) transparent transparent;
}
.card.broke { opacity: 0.38; filter: saturate(0.35); }

/* requisition: gamble on a random 4th component */
.card-req { border-color: rgba(232, 196, 104, 0.35); }
.card-req:hover { border-color: var(--gold); }
.card-req .req-icon {
  grid-row: 1 / 3;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 24px/1 var(--f-mono);
  color: var(--gold);
  border: 1px dashed rgba(232, 196, 104, 0.5);
}
.card canvas { grid-row: 1 / 3; width: 46px; height: 46px; }
.card .card-name { font: 600 13px/1.2 var(--f-disp); color: var(--silk); }
.card .card-desc { font: 400 10.5px/1.4 var(--f-disp); color: var(--dim); grid-column: 2 / 4; }
.card .card-cost { font: 600 13px/1 var(--f-mono); color: var(--gold); }

/* inspector: datasheet rows with dotted leaders */
#info { font-size: 12.5px; line-height: 1.5; }
#info h3 { font: 700 14px/1.3 var(--f-disp); letter-spacing: 0.5px; margin-bottom: 3px; }
#info .tier {
  font: 500 10px/1 var(--f-mono);
  letter-spacing: 1.5px;
  color: var(--gold);
  margin-bottom: 8px;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  border-bottom: 1px dotted rgba(125, 162, 148, 0.25);
  font: 500 12px/1.4 var(--f-mono);
}
.stat-row .sr-label {
  color: var(--dim);
  font-family: var(--f-disp);
  font-size: 10.5px;
  letter-spacing: 1.5px;
  align-self: center;
}
.info-btns { display: flex; flex-direction: column; gap: 7px; margin-top: 12px; }
.info-btns .btn { width: 100%; font-size: 11.5px; padding: 9px 10px; }
.btn-sell { border-color: rgba(255, 77, 94, 0.35); }
.btn-sell:hover:not(:disabled) { border-color: var(--fault); color: var(--fault); }

/* ── overlays: title blocks & fault reports ───────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 10, 8, 0.87);
  backdrop-filter: blur(4px);
  z-index: 10;
  overflow: auto;
  padding: 12px;
}
.overlay.hidden, .hidden { display: none !important; }

.overlay-box {
  text-align: center;
  background: var(--mask-2);
  border: 1px solid var(--copper);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  padding: 26px clamp(16px, 4.5cqw, 44px) 24px;
  max-width: min(660px, 96%);
  margin: auto;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}

/* the boot screen covers most of the board: the box hugs its scaled-up
   contents, so there is no dead space inside the frame */
#overlay-start .overlay-box {
  max-width: 92%;
  padding: 22px clamp(18px, 5.5cqw, 60px) 20px;
}
#overlay-start .title { font-size: clamp(26px, 5.5cqw, 44px); letter-spacing: clamp(3px, 1.2cqw, 9px); padding-bottom: 12px; margin-bottom: 6px; }
#overlay-start .tagline { font-size: 15px; margin-bottom: 16px; }
#overlay-start .loadout-label { font-size: 12.5px; letter-spacing: 2.6px; margin-bottom: 10px; }
#overlay-start .best { font-size: 14px; margin-bottom: 12px; }
#overlay-start .btn-big { font-size: clamp(14px, 2.3cqw, 17px); padding: 13px clamp(18px, 4.5cqw, 40px); }
#overlay-start .keys-hint { font-size: 11.5px; margin-top: 12px; }

/* ── main menu / settings / field manual screens ──────────────────── */
#overlay-mainmenu .overlay-box { padding: 34px clamp(20px, 8cqw, 80px) 30px; }
#overlay-mainmenu .title { font-size: clamp(26px, 5.5cqw, 44px); letter-spacing: clamp(3px, 1.2cqw, 9px); padding-bottom: 15px; margin-bottom: 8px; }
#overlay-mainmenu .tagline { font-size: 14.5px; }
#overlay-mainmenu .best { margin: 20px 0 0; }

.menu-btns {
  display: flex;
  flex-direction: column;
  gap: 13px;
  width: min(300px, 100%);
  margin: 28px auto 4px;
}
.menu-btns .btn-big { font-size: 16px; padding: 16px 0; }

/* upgrades screen: one card per tower on a horizontal scroll strip;
   sized to 3 full cards plus a sliver of the 4th as a scroll cue */
#overlay-upgrades .overlay-box { width: 878px; max-width: 94%; }
#overlay-upgrades .au-line { margin-bottom: 22px; }

#upgrades {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  margin-bottom: 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--copper) transparent;
}
#upgrades::-webkit-scrollbar { height: 9px; }
#upgrades::-webkit-scrollbar-track { background: var(--mask-3); }
#upgrades::-webkit-scrollbar-thumb { background: var(--copper); }
#upgrades::-webkit-scrollbar-thumb:hover { background: var(--copper-lit); }

.up-card {
  flex: 0 0 232px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  padding: 16px 15px 14px;
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  text-align: center;
}
.up-card canvas { width: 64px; height: 64px; }
.up-card .up-name { font: 600 15px/1.2 var(--f-disp); color: var(--silk); }
.up-card .up-desc {
  font: 400 11.5px/1.45 var(--f-disp);
  color: var(--dim);
  min-height: 33px;   /* two lines, so single-line blurbs stay aligned */
}
/* per-tier tabs: BASE plus one per reachable upgrade tier */
.up-card .up-tiers {
  display: flex;
  gap: 3px;
  width: 100%;
  margin-top: 2px;
}
.up-card .up-tier {
  flex: 1;
  min-width: 0;
  padding: 5px 0;
  font: 600 9.5px/1 var(--f-mono);
  letter-spacing: 0.3px;
  color: var(--dim);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
}
.up-card .up-tier:hover { border-color: var(--copper); color: var(--silk); }
.up-card .up-tier.on { color: var(--gold); border-color: var(--gold); background: #1B2B21; }

.up-card .up-stats { width: 100%; margin-top: 2px; }
.up-card .up-stats .stat-row { font-size: 11.5px; }
.up-card .up-buy {
  width: 100%;
  margin-top: auto;   /* buttons share a baseline across the strip */
  padding: 10px 6px;
  font-size: 11px;
  color: var(--gold);
  border-color: rgba(232, 196, 104, 0.4);
}
.up-card .up-buy:hover:not(:disabled) {
  border-color: var(--gold);
  color: var(--gold);
  background: #1B2B21;
}
.up-card .up-buy:disabled { color: var(--dim); opacity: 1; }

/* locked components: darkened icon until bought */
.up-card.locked canvas { filter: grayscale(0.85) brightness(0.55); opacity: 0.6; }
.up-card.locked .up-name { color: var(--dim); }

/* the two shop tabs: component arsenal / board skins */
.up-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
}
.up-tab {
  font: 600 12px/1 var(--f-mono);
  letter-spacing: 1.5px;
  color: var(--dim);
  background: transparent;
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  padding: 10px 22px;
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
}
.up-tab:hover { border-color: var(--copper); color: var(--silk); }
.up-tab.on {
  color: var(--gold);
  border-color: var(--gold);
  background: #1B2B21;
}

/* every pane shares a floor height so the box doesn't jump between tabs */
.up-pane {
  min-height: 392px;
  display: flex;
  flex-direction: column;
}
/* the skins pane carries two shops, so it is the one pane tall enough to
   push BACK off the board - cap it and let the shops scroll inside */
#up-pane-skins {
  max-height: min(430px, 50vh);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--copper) transparent;
}
#up-pane-skins::-webkit-scrollbar { width: 9px; }
#up-pane-skins::-webkit-scrollbar-track { background: var(--mask-3); }
#up-pane-skins::-webkit-scrollbar-thumb { background: var(--copper); }
#up-pane-skins::-webkit-scrollbar-thumb:hover { background: var(--copper-lit); }
/* the skins pane scrolls, and centering would strand its top row out of
   reach, so only the short consumables pane centres itself */
#up-pane-cons { justify-content: center; }

/* the skins pane runs two shops: board palettes over CPU cores */
.sk-head {
  font: 700 10px/1 var(--f-disp);
  letter-spacing: 2.6px;
  color: var(--dim);
  text-align: left;
  margin-bottom: 9px;
}
.sk-head + #cores { margin-bottom: 12px; }

/* board skins: one card per palette, REV B row over REV C row, columns
   aligned per board; previews stay in full color even while locked -
   they're the product */
#skins, #cores {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}
.skin-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 9px 9px 8px;
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}
.skin-card:hover { border-color: var(--gold); }
/* height follows the canvas's intrinsic 260:182 ratio at any card width */
.skin-card canvas { width: 100%; height: auto; }
.skin-card .sk-name {
  font: 600 13px/1.2 var(--f-disp);
  color: var(--silk);
  letter-spacing: 1.3px;
  margin-top: 2px;
}
.skin-card .sk-map { font: 500 9.5px/1.2 var(--f-mono); color: var(--dim); letter-spacing: 0.8px; }
.skin-card .sk-state { font: 600 11px/1.2 var(--f-mono); color: var(--gold); margin-top: 2px; }
.skin-card.on { border-color: var(--gold); }
.skin-card.locked .sk-name { color: var(--dim); }

/* ── consumables: armed with gold here, spent when the next run boots ── */
#consumables {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.cons-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 12px 13px 11px;
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.12s, background 0.12s;
}
.cons-card:hover { border-color: var(--gold); }
/* armed stock is locked in, so it stops advertising itself as clickable */
.cons-card.on { border-color: var(--gold); background: #1B2B21; cursor: default; }

/* the rack stays sealed until every component is owned - dimmed the same
   way locked components are, but still readable so the goal is visible */
.cons-card.sealed .cons-glyph { filter: grayscale(0.9) brightness(0.6); }
.cons-card.sealed .cons-name,
.cons-card.sealed .cons-desc,
.cons-card.sealed .cons-cost { color: var(--dim); }
.cons-card.sealed .cons-state { color: var(--gold); }

/* glyph and price share the top rule; the name gets its own line so a
   four-across row never has to squeeze them together */
.cons-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.cons-glyph {
  min-width: 36px;
  text-align: center;
  font: 700 20px/1 var(--f-mono);
  color: var(--gold);
  border: 1px dashed rgba(232, 196, 104, 0.5);
  padding: 7px 5px;
}
.cons-cost {
  font: 600 12.5px/1 var(--f-mono);
  color: var(--gold);
  white-space: nowrap;
}
.cons-name {
  font: 600 13px/1.25 var(--f-disp);
  letter-spacing: 1.4px;
  color: var(--silk);
  margin-top: 1px;
}
.cons-desc { font: 400 11.5px/1.45 var(--f-disp); color: var(--dim); }
.cons-state {
  margin-top: auto;
  padding-top: 3px;
  font: 600 10.5px/1.3 var(--f-mono);
  color: var(--gold);
}
.cons-card:not(.on) .cons-state { color: var(--dim); }

/* settings: the header trim pots, writ large */
.set-rows {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin: 28px auto 26px;
  width: fit-content;
}
.set-row { grid-template-columns: 120px 240px 34px; gap: 14px; }
.set-row .vol-label { font-size: 10.5px; text-align: left; }
.set-row .vol-num { font-size: 14px; }

.set-danger {
  margin-bottom: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.set-danger .keys-hint { margin-top: 10px; font-size: 11.5px; }
.btn-danger { border-color: rgba(255, 77, 94, 0.55); color: var(--fault); }
.btn-danger:hover:not(:disabled) { border-color: var(--fault); color: var(--fault); background: rgba(255, 77, 94, 0.1); }
.btn-danger.armed {
  background: var(--fault);
  border-color: var(--fault);
  color: #14100E;
  font-weight: 700;
}

/* field manual */
.help-box { max-width: min(800px, 96%); }
.help-box .tagline { margin-bottom: 4px; }
.help-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 32px;
  text-align: left;
  margin: 22px 0 26px;
}
.help-sec h4 {
  font: 600 10.5px/1 var(--f-disp);
  letter-spacing: 2.4px;
  color: var(--gold);
  margin-bottom: 7px;
}
.help-sec p { font: 400 12px/1.55 var(--f-disp); color: var(--dim); }
.help-sec b { color: var(--silk); font-weight: 600; }

.title {
  font: 700 clamp(22px, 4.5cqw, 34px)/1.1 var(--f-disp);
  letter-spacing: clamp(2px, 1cqw, 7px);
  color: var(--silk);
  margin-bottom: 6px;
  padding-bottom: 14px;
  position: relative;
}
/* copper keyline with a gold pad, like a title-block rule */
.title::after {
  content: '';
  position: absolute;
  left: 20%;
  right: 20%;
  bottom: 0;
  height: 2px;
  background: var(--copper);
  box-shadow: -14px 0 0 -0px var(--gold);
}
.title--fault { color: var(--fault); }
.title--dim { color: var(--dim); }

.tagline {
  color: var(--dim);
  font: 400 13.5px/1.5 var(--f-disp);
  letter-spacing: 0.5px;
  margin-bottom: 22px;
}

/* loadout picker */
.loadout-label {
  font: 600 10px/1 var(--f-disp);
  letter-spacing: 2px;
  color: var(--dim);
  margin-bottom: 10px;
}
.loadout-label #lo-count { color: var(--gold); }

/* 12 components four across and three deep, so the four a new save owns
   fill the top row exactly and the gold-locked eight sit below them -
   the row break does the explaining, no labelling needed */
#loadout {
  display: grid;
  grid-template-columns: repeat(4, minmax(84px, 156px));
  gap: 8px;
  justify-content: center;
  margin-bottom: 14px;
  max-width: 100%;
}
.lo-chip {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 6px 7px;
  background: var(--mask-3);
  border: 1px solid var(--line);
  clip-path: var(--notch-sm);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, opacity 0.12s;
}
.lo-chip:hover { border-color: var(--copper); }
.lo-chip.sel {
  border-color: var(--gold);
  background: #1B2B21;
}
.lo-chip.dis { opacity: 0.35; }

/* locked components: darkened icon, gold unlock price */
.lo-chip.locked canvas { filter: grayscale(0.85) brightness(0.55); opacity: 0.6; }
.lo-chip.locked .lo-name { color: var(--dim); }
.lo-chip.locked .lo-cost { color: var(--gold); }
.lo-chip.locked:hover { border-color: var(--gold); }

.lo-chip canvas { width: 44px; height: 44px; }
.lo-chip .lo-name {
  font: 600 12px/1.2 var(--f-disp);
  color: var(--silk);
  text-align: center;
}
.lo-chip .lo-cost { font: 600 11.5px/1 var(--f-mono); color: var(--gold); }

.au-line { color: var(--gold); font: 500 12.5px/1.5 var(--f-mono); margin-bottom: 14px; }
.best { color: var(--gold); font: 500 13px/1 var(--f-mono); margin-bottom: 18px; }
.keys-hint { margin-top: 20px; font-size: 11px; color: var(--dim); }

.stats-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 18px clamp(14px, 4cqw, 36px);
  justify-content: center;
  margin-bottom: 26px;
}
.stats-grid > div { display: flex; flex-direction: column; gap: 5px; }
.stat-label { font: 600 9.5px/1 var(--f-disp); letter-spacing: 2px; color: var(--dim); }
.stat-big { font: 600 26px/1 var(--f-mono); color: var(--silk); }
.stat-big.au { color: var(--gold); }

/* toast */
#toast {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--mask-3);
  border: 1px solid var(--copper);
  clip-path: var(--notch-sm);
  padding: 9px 20px;
  font: 600 12px/1 var(--f-mono);
  letter-spacing: 0.5px;
  z-index: 20;   /* above the menu overlays (z 10), or purchases go unread */
  pointer-events: none;
  animation: toastin 0.18s;
  /* hugs one line while it fits, wraps instead of spilling past the frame */
  width: max-content;
  max-width: calc(100% - 16px);
  text-align: center;
}
@keyframes toastin {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* wave-cleared banner: rides the top of the board, twice the presence */
/* menu screens have no HUD bar - only the gold chip floats top-left, so
   pop messages ride that same line */
#app.menu #toast,
#app.menu #toast.toast-big {
  bottom: auto;
  top: 10px;
}

#toast.toast-big {
  bottom: auto;
  /* clears the HUD bar however tall it currently is (fitBoard sets the var) */
  top: calc(var(--hud-h, 52px) + 14px);
  padding: 15px clamp(16px, 3.5cqw, 34px);
  font-size: clamp(14px, 2.8cqw, 20px);
  letter-spacing: 2px;
  color: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 24px rgba(232, 196, 104, 0.25), 0 10px 30px rgba(0, 0, 0, 0.5);
  animation: toastin-top 0.22s;
}
@keyframes toastin-top {
  from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── accessibility & small screens ────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .btn-primary.ready { animation: none; }
  .pads span { transition: none; }
}

@media (max-width: 900px) {
  #app { height: auto; min-height: calc(100vh / var(--ui-zoom)); padding: 8px 10px 10px; }
  #main { flex-direction: column; gap: 10px; }
  #sidebar { width: 100%; min-width: 0; flex-direction: row; flex-wrap: wrap; overflow-y: visible; }
  #sidebar::before, .panel::before, .panel::after { display: none; }
  #sidebar .panel { flex: 1; min-width: 240px; }
}

/* ── container tiers: the HUD and overlay internals track the board
   frame's real width, whether it's narrow because the window is small
   or because a short window letterboxed the canvas down ─────────────── */
@container (max-width: 1080px) {
  #hud-bar { gap: 8px; }
  .hud-side { gap: 2px 8px; }
  #hud-bar .readout { padding: 3px 8px; }
  #hud-bar .ro-lives { padding: 3px 12px; }
  .pads span { width: 8px; }
  #hud-bar .btn { font-size: 12px; padding: 10px 12px; }
  #hud-bar .btn-util { min-width: 44px; padding: 10px 8px; font-size: 12px; }
  #btn-wave { min-width: 150px; }
  #btn-settings { font-size: 17px; padding: 5px 11px; }
}

@container (max-width: 880px) {
  #hud-bar { gap: 6px; }
  .hud-side { gap: 2px 6px; }
  #hud-bar .readout { padding: 3px 5px; }
  #hud-bar .ro-num { font-size: 15px; }
  #hud-bar .ro-label { font-size: 8px; letter-spacing: 1.6px; }
  #hud-bar .ro-lives { padding: 3px 8px; }
  #hud-bar .ro-lives .ro-label { font-size: 9.5px; letter-spacing: 2px; }
  .pads { gap: 2px; }
  .pads span { width: 6px; height: 4px; }
  #hud-bar .btn { font-size: 11px; padding: 9px 8px; }
  #hud-bar .btn-util { min-width: 36px; padding: 9px 6px; font-size: 11px; }
  #btn-wave { min-width: 108px; }
  #btn-settings { font-size: 15px; padding: 5px 9px; }
  /* four rows of chips have to keep shrinking with the frame, or the boot
     screen pushes POWER ON past the bottom edge of the board */
  .lo-chip { padding: 6px 5px 6px; }
  .lo-chip canvas { width: 38px; height: 38px; }
  .lo-chip .lo-name { font-size: 11px; }
  #loadout { gap: 7px; margin-bottom: 11px; }
  #overlay-start .overlay-box { padding: 18px clamp(16px, 4.5cqw, 46px) 16px; }
  #overlay-start .title { font-size: clamp(22px, 5cqw, 34px); padding-bottom: 9px; margin-bottom: 5px; }
  #overlay-start .tagline { font-size: 13px; margin-bottom: 11px; }
  #overlay-start .loadout-label { font-size: 11.5px; margin-bottom: 8px; }
  #overlay-start .btn-big { padding: 12px clamp(16px, 4cqw, 36px); }
  #overlay-start .keys-hint { display: none; }
}

@container (max-width: 720px) {
  #hud-bar { gap: 4px; padding: 4px 8px; }
  .hud-side { gap: 2px 4px; }
  #hud-bar .btn { font-size: 10px; padding: 8px 6px; letter-spacing: 0.7px; }
  #hud-bar .btn-util { min-width: 30px; padding: 8px 4px; font-size: 10px; }
  #btn-wave { min-width: 100px; }
  #btn-settings { font-size: 14px; padding: 4px 8px; }
  .pads span { width: 5px; }
  .help-cols { grid-template-columns: 1fr; gap: 14px; }
  #consumables { grid-template-columns: 1fr 1fr; }
  #loadout { grid-template-columns: repeat(4, minmax(66px, 128px)); gap: 6px; margin-bottom: 10px; }
  .lo-chip canvas { width: 33px; height: 33px; }
  .lo-chip .lo-name { font-size: 10px; }
  #overlay-start .overlay-box { padding: 16px clamp(14px, 4cqw, 40px) 15px; }
  #overlay-start .tagline { font-size: 12.5px; margin-bottom: 10px; }
  #overlay-start .loadout-label { margin-bottom: 7px; }
  #overlay-start .btn-big { padding: 11px clamp(14px, 4cqw, 34px); }
  #overlay-start .keys-hint { display: none; }
}

@container (max-width: 560px) {
  #consumables { grid-template-columns: 1fr; }
  /* still four across, just a smaller chip - dropping to fewer columns
     would add rows and run the boot screen off the bottom of the board */
  .lo-chip { padding: 5px 4px 5px; gap: 3px; }
  .lo-chip canvas { width: 29px; height: 29px; }
  .lo-chip .lo-name { font-size: 9.5px; }
  .lo-chip .lo-cost { font-size: 10px; }
  .set-rows { width: 100%; }
  .set-row { grid-template-columns: 84px 1fr 30px; gap: 8px; }
  .stat-big { font-size: 21px; }
}