/* ============================================================================
   Base theme + shared components. view.css (main ship view / HUD) and
   screens.css (overlays) build on these tokens and classes.
   Single deliberate dark "deep space bridge" look; not theme-switched.
   ========================================================================== */
:root {
  color-scheme: dark;

  /* surfaces */
  --bg: #090d1b;
  --bg-2: #0f1630;
  --panel: #131b34;
  --panel-2: #1a2646;
  --panel-3: #22315a;
  --line: #2f4170;
  --line-hi: #58719f;
  --scrim: rgba(4, 7, 16, 0.72);

  /* text */
  --text: #e6ecf8;
  --text-dim: #97a6c6;
  --text-faint: #5d6c8f;

  /* semantic game colors */
  --accent: #ffb547;        /* selection, primary actions ("signal amber") */
  --accent-ink: #1d1405;
  --power: #62e07e;         /* reactor / power bars */
  --power-dim: #24452f;
  --shield: #52c6ff;
  --ion: #9d88ff;
  --hull-ok: #6fd36a;
  --hull-mid: #f2c94c;
  --hull-low: #ff5d5d;
  --danger: #ff5d5d;
  --warn: #ffb547;
  --fire: #ff8a3d;
  --oxygen-low: #ff6f91;
  --scrap: #f3c64d;
  --fuel: #ff9f43;
  --missile: #d7def0;
  --blue-opt: #6ec1ff;      /* event choices unlocked by crew / equipment */
  --good: #6fd36a;

  /* type */
  --font-ui: 'Silkscreen', 'PingFang SC', 'HarmonyOS Sans SC', 'MiSans', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-title: 'ZCOOL QingKe HuangYou', 'Silkscreen', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --fs-xs: 12px;            /* numbers / Latin only; Chinese text uses >= --fs-s */
  --fs-s: 12.5px;
  --fs-m: 14px;
  --fs-l: 16px;
  --fs-xl: 20px;
  --fs-xxl: 28px;

  /* geometry */
  --gap: 8px;
  --pad: 12px;
  --bevel: 8px;             /* legacy; pixel UI uses square corners */
  /* pixel-art frame system (see ART.md): hard 2px lines, no blur, no gradients */
  --px: 2px;
  --frame-out: #05070e;     /* outer dark outline */
  --frame: #7f8fb0;         /* main light border (FTL-style steel) */
  --frame-hi: #c3cde2;
  --frame-shade: #0b1122;   /* hard drop shadow */
  --pix-frame: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--frame), inset 0 0 0 calc(var(--px) * 2) var(--frame-out);
  --pix-drop: 0 calc(var(--px) * 2) 0 0 var(--frame-shade);
  --tap: 44px;              /* minimum touch target */
}

* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-m);
  line-height: 1.45;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

#app {
  position: relative;
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
  overflow: hidden;
  background:
    radial-gradient(120% 60% at 50% 0%, #16204a 0%, transparent 60%),
    radial-gradient(90% 50% at 50% 100%, #111a3a 0%, transparent 70%),
    var(--bg);
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  font-variant-numeric: tabular-nums;
}
@media (min-width: 481px) {
  #app { box-shadow: 0 0 0 1px var(--line), 0 0 60px rgba(0, 0, 0, 0.6); }
}

/* Standalone build: we own the whole screen, so keep content clear of the notch/home bar.
   (Inside a claude.ai Artifact the host already pads :root by the safe-area insets, and there
   is no .standalone class.) */
#view { position: absolute; inset: 0; touch-action: none; }
.standalone #view {
  top: env(safe-area-inset-top, 0px);
  bottom: env(safe-area-inset-bottom, 0px);
}
#overlays { position: absolute; inset: 0; pointer-events: none; }
.standalone #overlays {
  top: env(safe-area-inset-top, 0px);
  bottom: env(safe-area-inset-bottom, 0px);
}
#toasts {
  position: absolute; left: 0; right: 0; top: 56px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  pointer-events: none; z-index: 50;
}
.standalone #toasts { top: calc(env(safe-area-inset-top, 0px) + 56px); }

/* ---------- overlay shell (G.UI.open) ---------- */
.overlay {
  position: absolute; inset: 0;
  pointer-events: auto;
  display: flex; flex-direction: column; justify-content: flex-end;
  background: var(--scrim);
  animation: ov-in 160ms ease-out;
}
.overlay.center { justify-content: center; padding: 16px; }
.overlay.full { background: var(--bg); justify-content: flex-start; }
.overlay.clear { background: transparent; pointer-events: none; }
.overlay.clear > * { pointer-events: auto; }
@keyframes ov-in { from { opacity: 0; } to { opacity: 1; } }

/* bottom sheet: default container for modal screens */
.sheet {
  position: relative;
  max-height: 90%;
  display: flex; flex-direction: column;
  background: var(--panel);
  border-top: var(--px) solid var(--frame);
  box-shadow: 0 calc(var(--px) * -1) 0 var(--frame-out), inset 0 var(--px) 0 var(--frame-out);
  animation: sheet-in 160ms steps(4, end);
}
@keyframes sheet-in { from { transform: translateY(24px); opacity: 0.4; } to { transform: none; opacity: 1; } }
.sheet-head {
  display: flex; align-items: center; gap: var(--gap);
  padding: 12px 16px 8px;
  border-bottom: var(--px) solid var(--frame-out);
}
.sheet-title { font-size: var(--fs-l); font-weight: 700; letter-spacing: 0.04em; flex: 1; }
.sheet-body { overflow-y: auto; -webkit-overflow-scrolling: touch; touch-action: pan-y; padding: 12px 16px; flex: 1; min-height: 0; }
.sheet-foot {
  display: flex; gap: var(--gap); padding: 10px 16px 14px;
  border-top: var(--px) solid var(--frame-out);
}
.sheet-foot > .btn { flex: 1; }

/* ---------- panel ---------- */
.panel {
  position: relative;
  background: var(--panel);
  box-shadow: var(--pix-frame);
  padding: calc(var(--pad) + var(--px));
}
.panel.hi { box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--accent), inset 0 0 0 calc(var(--px) * 2) var(--frame-out); }

/* ---------- buttons ---------- */
.btn {
  appearance: none; border: 0; cursor: pointer;
  min-height: var(--tap); padding: 0 16px;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-weight: 600; font-size: var(--fs-m); letter-spacing: 0.03em;
  color: var(--text);
  background: var(--panel-3);
  box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--frame), var(--pix-drop);
  image-rendering: pixelated;
}
.btn:active { transform: translateY(var(--px)); box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--frame-hi); }
.btn:focus-visible { outline: var(--px) solid var(--accent); outline-offset: var(--px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) #ffd894, inset 0 calc(var(--px) * -2) 0 #c9832a, var(--pix-drop); }
.btn.danger { background: #5a1f28; box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--danger), var(--pix-drop); color: #ffd9dc; }
.btn.ghost { background: transparent; box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--line-hi); }
/* .btn.small: secondary actions inside sheets only, never on the main view */
.btn.small { min-height: 36px; padding: 0 10px; font-size: var(--fs-s); }
.btn:disabled, .btn.disabled { opacity: 0.4; pointer-events: none; }
.btn.icon { width: var(--tap); padding: 0; }

/* ---------- chips / resources ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; min-height: 24px;
  font-size: var(--fs-s); font-weight: 600;
  background: var(--bg-2);
  box-shadow: inset 0 0 0 var(--px) var(--line);
  white-space: nowrap;
}
.chip.good { color: var(--good); box-shadow: inset 0 0 0 var(--px) #2f6a33; }
.chip.bad { color: var(--danger); box-shadow: inset 0 0 0 var(--px) #7a2a2f; }
.res-scrap { color: var(--scrap); }
.res-fuel { color: var(--fuel); }
.res-missiles { color: var(--missile); }
.res-hull { color: var(--hull-ok); }

.ico { width: 1em; height: 1em; display: inline-block; vertical-align: -0.12em; flex: none; }
.ico svg { width: 100%; height: 100%; display: block; }

/* ---------- text helpers ---------- */
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.label {
  font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-dim);
}
.title-font { font-family: var(--font-title); letter-spacing: 0.06em; }
.blue { color: var(--blue-opt); }
.warn { color: var(--warn); }
.danger { color: var(--danger); }
.good { color: var(--good); }
.row { display: flex; align-items: center; gap: var(--gap); }
.col { display: flex; flex-direction: column; gap: var(--gap); }
.grow { flex: 1; min-width: 0; }
.wrap { flex-wrap: wrap; }

/* ---------- toast ---------- */
.toast {
  max-width: 86%;
  padding: 8px 14px;
  background: var(--panel);
  box-shadow: var(--pix-frame), var(--pix-drop);
  font-size: var(--fs-s);
  animation: toast-in 180ms ease-out;
}
.toast.warn { box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--warn); color: #ffe2b0; }
.toast.bad { box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--danger); color: #ffd0d4; }
.toast.good { box-shadow: 0 0 0 var(--px) var(--frame-out), inset 0 0 0 var(--px) var(--good); color: #d6ffd2; }
.toast.out { opacity: 0; transition: opacity 250ms; }
@keyframes toast-in { from { transform: translateY(-8px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- confirm dialog (G.UI.confirm) ---------- */
.dialog { width: 100%; max-width: 360px; margin: 0 auto; }
.dialog .panel { padding: 18px 16px 14px; }
.dialog h3 { margin: 0 0 6px; font-size: var(--fs-l); }
.dialog p { margin: 0 0 14px; color: var(--text-dim); }
.dialog .row > .btn { flex: 1; }

@media (prefers-reduced-motion: reduce) {
  /* Collapse every animation to one near-instant pass (never ~1000 loops/s strobe);
     static colour-state classes (.hot/.low/.hurt) still convey the state. */
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}