/* ─────────────────────────────────────────────────────────────
   Lunar Hopper — HUD styling.
   Cold instrument-panel look: thin uppercase mono, cyan accents,
   soft glass panels. Everything is pointer-events:none except the
   start button, so the mouse stays free for camera dragging.
   ───────────────────────────────────────────────────────────── */

:root {
  --cyan: #7fe3ff;
  --cyan-dim: rgba(127, 227, 255, 0.55);
  --amber: #ffc46b;
  --ink: #e9f4fb;
  --panel-bg: rgba(6, 12, 20, 0.42);
  --panel-edge: rgba(127, 227, 255, 0.22);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #04070c;
  color: var(--ink);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#scene.dragging { cursor: grabbing; }

/* ── HUD frame ───────────────────────────────────────────── */

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  user-select: none;
}
.hud[hidden] { display: none; }

.hud-corner { position: absolute; }
.hud-corner.tl { top: 18px; left: 18px; }
.hud-corner.tr { top: 18px; right: 18px; }
.hud-corner.bl { bottom: 18px; left: 18px; }

.panel {
  position: relative;
  min-width: 208px;
  padding: 12px 14px 13px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-edge);
  border-radius: 3px;
  backdrop-filter: blur(9px) saturate(1.1);
  -webkit-backdrop-filter: blur(9px) saturate(1.1);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
/* corner ticks */
.panel::before,
.panel::after {
  content: "";
  position: absolute;
  width: 9px; height: 9px;
  border: 1px solid var(--cyan-dim);
  pointer-events: none;
}
.panel::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.panel::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.panel-title {
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 9px;
  opacity: 0.9;
}

.stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  font-size: 11px;
  line-height: 1.85;
}
.stat-label {
  color: rgba(233, 244, 251, 0.52);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 9.5px;
}
.stat-value { color: var(--ink); font-variant-numeric: tabular-nums; }
.stat-value b { color: var(--cyan); font-weight: 600; }
.stat-value i { color: rgba(233, 244, 251, 0.45); font-style: normal; margin: 0 2px; }

#backend { font-size: 9.5px; letter-spacing: 0.1em; }
#backend.webgpu { color: #8bffcf; }

/* crystal pips */
.crystal-pips {
  display: flex;
  gap: 3px;
  margin: 7px 0 4px;
  flex-wrap: wrap;
  max-width: 180px;
}
.crystal-pips i {
  width: 7px; height: 7px;
  background: rgba(127, 227, 255, 0.16);
  border: 1px solid rgba(127, 227, 255, 0.3);
  transform: rotate(45deg);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.crystal-pips i.on {
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan), 0 0 16px rgba(127, 227, 255, 0.5);
}

/* controls list */
.panel.controls { min-width: 250px; }
.panel.controls ul { list-style: none; margin: 0; padding: 0; }
.panel.controls li {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  line-height: 1.9;
  color: rgba(233, 244, 251, 0.6);
}
.panel.controls li span { margin-left: 5px; letter-spacing: 0.04em; }
kbd {
  display: inline-block;
  min-width: 17px;
  padding: 1px 4px;
  font: inherit;
  font-size: 9px;
  text-align: center;
  color: var(--ink);
  background: rgba(127, 227, 255, 0.09);
  border: 1px solid rgba(127, 227, 255, 0.3);
  border-bottom-width: 2px;
  border-radius: 3px;
}
.hint {
  margin-top: 9px;
  padding-top: 8px;
  border-top: 1px solid rgba(127, 227, 255, 0.14);
  font-size: 9.5px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--amber);
  opacity: 0.85;
}

/* compass */
.compass {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 12px 5px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-edge);
  border-radius: 3px;
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
}
.compass span {
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--cyan-dim);
  font-variant-numeric: tabular-nums;
}

/* toasts (bottom-right stack) */
.toast-stack {
  position: absolute;
  right: 18px;
  bottom: 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}
.toast {
  padding: 7px 12px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--panel-bg);
  border: 1px solid var(--panel-edge);
  border-left: 2px solid var(--cyan);
  border-radius: 2px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: toastIn 0.28s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}
.toast.gold { border-left-color: var(--amber); color: #ffe3b0; }
.toast.fade { animation: toastOut 0.45s ease forwards; }
@keyframes toastIn  { from { opacity: 0; transform: translateX(18px); } }
@keyframes toastOut { to   { opacity: 0; transform: translateX(18px); } }

/* big centred banner (mission complete) */
.center-toast {
  position: absolute;
  top: 34%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 22px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 0 22px rgba(127, 227, 255, 0.75), 0 0 60px rgba(127, 227, 255, 0.35);
  opacity: 0;
  transition: opacity 0.5s ease;
  white-space: nowrap;
}
.center-toast.show { opacity: 1; animation: bannerPulse 2.4s ease-in-out infinite; }
@keyframes bannerPulse { 0%, 100% { transform: translate(-50%, -50%) scale(1); } 50% { transform: translate(-50%, -50%) scale(1.035); } }

.reticle {
  position: absolute;
  top: 50%; left: 50%;
  width: 5px; height: 5px;
  margin: -2.5px 0 0 -2.5px;
  border-radius: 50%;
  background: rgba(127, 227, 255, 0.75);
  box-shadow: 0 0 8px rgba(127, 227, 255, 0.8);
}
.reticle[hidden] { display: none; }

/* flash on hard landing / launch */
.damage-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(ellipse at center, transparent 42%, rgba(255, 196, 107, 0.35) 100%);
  transition: opacity 0.45s ease;
}

/* ── Title overlay ───────────────────────────────────────── */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  /* Translucent, so the lunar basin and the lander stay visible behind the
     title instead of a flat black card. */
  background:
    radial-gradient(ellipse at 50% 55%, rgba(4, 7, 12, 0.42), rgba(4, 7, 12, 0.86) 62%, rgba(4, 7, 12, 0.95) 100%);
  backdrop-filter: blur(1.5px);
  -webkit-backdrop-filter: blur(1.5px);
  transition: opacity 0.7s ease, visibility 0.7s;
}
.overlay.gone { opacity: 0; visibility: hidden; pointer-events: none; }

.overlay-inner { text-align: center; padding: 28px; max-width: 640px; }

.eyebrow {
  font-size: 10px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--cyan-dim);
  margin-bottom: 18px;
}

.overlay h1 {
  margin: 0;
  font-size: clamp(40px, 9vw, 84px);
  line-height: 0.94;
  letter-spacing: 0.06em;
  font-weight: 500;
  text-transform: uppercase;
  text-shadow: 0 0 40px rgba(127, 227, 255, 0.28);
}
.overlay h1 span {
  display: block;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan-dim);
}

.tagline {
  margin: 20px 0 34px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(233, 244, 251, 0.55);
  text-transform: uppercase;
}

.loader { max-width: 320px; margin: 0 auto; }
.loader-bar {
  height: 2px;
  background: rgba(127, 227, 255, 0.14);
  overflow: hidden;
}
.loader-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, transparent, var(--cyan));
  box-shadow: 0 0 12px var(--cyan);
  transition: width 0.3s ease;
}
.loader-text {
  margin-top: 11px;
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(233, 244, 251, 0.45);
  min-height: 12px;
}
.loader.done { display: none; }

.start-btn {
  margin-top: 6px;
  padding: 15px 46px;
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: #04121a;
  background: var(--cyan);
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  box-shadow: 0 0 34px rgba(127, 227, 255, 0.4);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
  pointer-events: auto;
}
.start-btn:hover  { transform: translateY(-2px); box-shadow: 0 0 48px rgba(127, 227, 255, 0.6); }
.start-btn:active { transform: translateY(0); }
.start-btn small {
  display: block;
  margin-top: 6px;
  font-size: 8.5px;
  letter-spacing: 0.18em;
  opacity: 0.65;
  text-transform: none;
}

.overlay-foot {
  margin-top: 40px;
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(233, 244, 251, 0.3);
}
.overlay-foot .dot { margin: 0 8px; }

/* fatal error card */
.fatal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  background: #04070c;
  padding: 30px;
}
.fatal[hidden] { display: none; }
.fatal-inner { max-width: 720px; }
.fatal h2 {
  font-size: 14px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #ff8f6b;
  margin: 0 0 14px;
}
.fatal pre {
  font-size: 11px;
  line-height: 1.7;
  color: rgba(233, 244, 251, 0.7);
  white-space: pre-wrap;
  margin: 0;
}

/* small screens: keep the view clear */
@media (max-width: 720px) {
  .panel.controls { display: none; }
  .hud-corner.tl, .hud-corner.tr { transform: scale(0.88); transform-origin: top; }
  .hud-corner.tl { transform-origin: top left; }
  .hud-corner.tr { transform-origin: top right; }
}