:root {
  --bg: #07090c;
  --panel: rgba(10, 14, 20, 0.88);
  --ink: #e8ecf1;
  --muted: #8e9aa8;
  --accent: #ffb52e;
  --danger: #ff4b3e;
  --ok: #57d68d;
  --line: rgba(255, 255, 255, 0.14);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
}

#view {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
}

.panel {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(560px, calc(100% - 32px));
  max-height: calc(100% - 32px);
  overflow: auto;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  backdrop-filter: blur(6px);
}

.panel[hidden], #hud[hidden], [hidden] { display: none !important; }

h1 {
  margin: 0 0 4px;
  font: 800 44px/1 var(--mono);
  letter-spacing: 0.12em;
}
h1 em { color: var(--accent); font-style: normal; }
h2 { margin: 0 0 16px; font: 700 24px var(--mono); letter-spacing: 0.1em; }
.sub { color: var(--muted); margin: 0 0 18px; }
.hint { color: var(--muted); font-size: 13px; }
code, kbd { font-family: var(--mono); font-size: 0.92em; color: var(--accent); }
#load-status { min-height: 1.4em; font-family: var(--mono); font-size: 13px; }
#load-status.error { color: var(--danger); }

.button {
  display: inline-block;
  margin: 8px 8px 8px 0;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font: 600 14px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
.button.primary { background: var(--accent); border-color: var(--accent); color: #1a1204; }
.button:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.field { display: block; margin: 14px 0; color: var(--muted); font: 600 12px var(--mono); letter-spacing: 0.08em; }
.field select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 8px;
  background: #11161d;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: 14px var(--mono);
}

.keys { width: 100%; margin-top: 18px; border-collapse: collapse; font-size: 13px; }
.keys td { padding: 4px 6px; border-top: 1px solid var(--line); }
.keys td:nth-child(odd) { font-family: var(--mono); color: var(--accent); white-space: nowrap; }

.drop { outline: 2px dashed var(--accent); outline-offset: -8px; }

/* HUD (modelled on the original's: chrome globe map, energy capsule, special weapon, score) */
#hud {
  --hud-font: "Trebuchet MS", "Verdana", system-ui, sans-serif;
  position: fixed;
  inset: 0;
  pointer-events: none;
}
#globe { position: absolute; left: 14px; top: 10px; width: 150px; height: 150px; }
#objective {
  position: absolute;
  left: 20px;
  top: 164px;
  font: 600 11px var(--mono);
  letter-spacing: 0.12em;
  color: #e9edf2;
  text-shadow: 1px 1px 0 #000, 0 0 4px #000;
}
#energy { position: absolute; right: 18px; top: 12px; width: 44px; height: 110px; filter: drop-shadow(2px 3px 2px rgba(0, 0, 0, 0.7)); }
#energy.low #energy-level { fill: #d8574c; }
#special { position: absolute; left: 14px; bottom: 12px; display: flex; align-items: center; gap: 10px; }
#special-icon { width: 56px; height: 56px; filter: drop-shadow(2px 3px 2px rgba(0, 0, 0, 0.7)); }
#special.empty #special-icon rect:first-of-type { fill: none; stroke: #c9ccd1; stroke-width: 3; }
#special.empty #special-icon rect:nth-of-type(2), #special.empty #special-glyph, #special.empty #special-text { display: none; }
#special-text, #score {
  font: italic 700 26px/1.05 var(--hud-font);
  color: #fff;
  text-shadow: 2px 2px 0 #000, 3px 3px 3px rgba(0, 0, 0, 0.8);
}
#special-text { display: flex; flex-direction: column; }
#special-count { font-size: 22px; }
#score-block { position: absolute; right: 18px; bottom: 12px; text-align: right; }
#score { letter-spacing: 0.04em; font-variant-numeric: tabular-nums; }
#minimap {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(70vmin, 512px);
  height: min(70vmin, 512px);
  transform: translate(-50%, -50%);
  border: 1px solid var(--line);
  image-rendering: pixelated;
}
#banner {
  position: absolute;
  left: 0;
  right: 0;
  top: 30%;
  text-align: center;
  font: italic 800 clamp(22px, 5vw, 44px) var(--hud-font);
  letter-spacing: 0.08em;
  color: #fff;
  text-shadow: 2px 2px 0 #000, 0 0 8px #000;
}

@media (max-width: 600px) {
  #globe { width: 104px; height: 104px; }
  #objective { top: 118px; }
  #energy { width: 32px; height: 80px; }
  #special-icon { width: 42px; height: 42px; }
  #special-text, #score { font-size: 18px; }
  #special-count { font-size: 16px; }
  .panel { padding: 20px; }
  h1 { font-size: 34px; }
}

/* ------------------------------------------------------------ front end (original style) */

:root {
  --menu-font: 900 italic clamp(14px, 3.7vh, 34px)/1.12 "Arial Black", "Helvetica Neue", Arial, sans-serif;
  /* White lettering with a hard black outline, as on the original's menus. */
  --menu-outline: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000, 0 2px 2px rgba(0,0,0,0.7);
}

#splash {
  position: fixed; inset: 0; display: grid; place-content: center; text-align: center;
  background: #000; cursor: pointer; user-select: none;
}
.splash-logo {
  font: 900 italic clamp(48px, 14vw, 160px)/1 "Arial Black", Impact, sans-serif;
  letter-spacing: -0.02em; transform: skewX(-8deg);
  background: linear-gradient(#fff 0%, #c9d3e0 30%, #5b6878 48%, #1e2732 52%, #8c9cb0 70%, #e8eef6 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  -webkit-text-stroke: 2px #9fb4cc;
}
.splash-logo span { font-size: 0.32em; -webkit-text-stroke: 1px #c8d2de; vertical-align: middle; }
.blink { margin-top: 3vh; font: var(--menu-font); color: #fff; text-shadow: var(--menu-outline); animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

#frontend { position: fixed; inset: 0; pointer-events: none; }
#menu-box, .menu-box {
  position: absolute; left: 50%; top: 31vh; transform: translateX(-50%);
  width: min(58vw, 92vh, 760px); min-width: min(320px, calc(100vw - 32px));
  pointer-events: auto; user-select: none;
  font: var(--menu-font); color: #fff; text-shadow: var(--menu-outline); text-align: center;
}
#menu-header, .menu-header {
  padding: 0.12em 0.4em 0.18em;
  background: linear-gradient(#c2c4c6, #9a9c9f 45%, #808285 55%, #8e9093);
  border: 1px solid #e9ebee; border-bottom-color: #3a3c3f;
  white-space: pre-line;
}
#menu-header:empty { display: none; }
#menu-items, .menu-list {
  list-style: none; margin: 0.18em 0 0; padding: 0.1em 0;
  border-top: 1px solid rgba(255,255,255,0.85); border-bottom: 1px solid rgba(255,255,255,0.85);
  background: rgba(0, 0, 0, 0.18);
}
#menu-items li, .menu-list li { margin: 0; }
#menu-items li.rule { height: 0; margin: 0.12em 0; border-top: 1px solid rgba(255,255,255,0.85); }
#menu-items li.text { padding: 0.02em 0.4em; font-size: 0.86em; }
#menu-items li.empty { color: #ddd; letter-spacing: 0.3em; }
#menu-items button, .menu-list button {
  all: unset; box-sizing: border-box; display: block; width: 100%; padding: 0.02em 0.4em;
  border: 1px solid transparent; cursor: pointer; font: inherit; color: inherit; text-shadow: inherit;
}
#menu-items button.sel, .menu-list button:focus, .menu-list button:hover {
  background: linear-gradient(rgba(20,22,24,0.88), rgba(45,47,50,0.88)); border-color: #e3e5e8;
}
#menu-items .value { color: #ffd84a; }
#menu-items .slider { display: inline-block; width: 7em; height: 0.18em; margin: 0 0.4em; vertical-align: middle;
  background: #d8dadd; border: 1px solid #000; position: relative; }
#menu-items .slider i { position: absolute; top: -0.32em; width: 0.32em; height: 0.8em; background: #e9ebee; border: 1px solid #000; transform: translateX(-50%); }
#menu-help { position: absolute; bottom: 2vh; width: 100%; text-align: center; font: 600 12px var(--mono); color: rgba(255,255,255,0.55); }
#menu-help kbd { margin: 0 2px; }
.menu-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.35); }

#briefing { position: fixed; inset: 0; background: #000; }
#briefing-map, .briefing-cockpit { width: 100%; height: 100%; display: block; }
#briefing-skip { position: absolute; bottom: 2vh; width: 100%; text-align: center; font: 600 12px var(--mono); color: rgba(255,255,255,0.5); }

/* The intro cinematic. */
#intro { position: fixed; inset: 0; background: #000; z-index: 50; transition: opacity 0.45s; }
#intro canvas { width: 100%; height: 100%; display: block; }
#intro.fade { opacity: 0; }
.intro-skip { position: absolute; right: 16px; bottom: 12px; font: 600 12px var(--mono); color: rgba(255,255,255,0.35); }
#briefing canvas { position: absolute; inset: 0; }