Made of little things.

/*
  BLOCKFALL — cold-war demolition range.
  App-owned palette: radar phosphor, launch-pad amber, hazard red on near-black.
  The only host surface is the napplet frame; theme data is intentionally ignored.
*/

:root {
  --void: #03080a;
  --panel: #071310;
  --panel-2: #0a1a15;
  --line: rgba(125, 243, 184, 0.22);
  --line-strong: rgba(142, 255, 205, 0.5);
  --ink: #cdf6e2;
  --muted: #6f9c88;
  --phosphor: #7df3b8;
  --amber: #ffb457;
  --amber-hot: #ffe0a3;
  --hazard: #ff5f4a;
  --ui: "SFMono-Regular", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  --radius: 3px;
  color-scheme: dark;
  font: 12px/1.35 var(--ui);
}

* {
  box-sizing: border-box;
}

:where(html, body, body *) {
  -webkit-user-select: none;
  user-select: none;
}

html,
body,
#app {
  height: 100%;
  margin: 0;
  background: var(--void);
  color: var(--ink);
}

body {
  overflow: hidden;
}

.app {
  container-type: inline-size;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 6px;
  padding: 8px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 110%, rgba(22, 66, 52, 0.38), transparent 62%),
    var(--void);
}

/* Status rail ───────────────────────────────────────────────────────── */

.hud {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  min-height: 22px;
  padding: 0 2px;
}

.hud-cell {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.hud-right {
  justify-content: flex-end;
}

.hud-key {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
}

.hud-value {
  color: var(--phosphor);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 12px rgba(125, 243, 184, 0.35);
}

.best {
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.best b {
  color: var(--amber);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.hud-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  white-space: nowrap;
}

.hud-brand em {
  color: var(--muted);
  font-size: 8px;
  font-style: normal;
  font-weight: 400;
  letter-spacing: 0.16em;
}

.brand-mark {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hazard);
  box-shadow: 0 0 10px var(--hazard);
  animation: beacon 2.4s ease-in-out infinite;
}

/* Range viewport ───────────────────────────────────────────────────── */

.stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #050d0f;
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.7);
}

.stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 45%, transparent 48%, rgba(0, 0, 0, 0.55) 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.35), transparent 12%, transparent 88%, rgba(0, 0, 0, 0.35));
}

.stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.3;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.32) 0,
    rgba(0, 0, 0, 0.32) 1px,
    transparent 1px,
    transparent 3px
  );
}

.banner {
  position: absolute;
  top: 20%;
  left: 50%;
  z-index: 2;
  min-width: min(340px, 82%);
  padding: 10px 20px 11px;
  border-top: 1px solid var(--phosphor);
  border-bottom: 1px solid var(--phosphor);
  background: rgba(3, 12, 10, 0.88);
  text-align: center;
  pointer-events: none;
  transform: translate(-50%, 0);
  opacity: 0;
}

.banner.is-in {
  animation: banner-in 0.36s ease-out forwards;
}

.banner[data-tone="win"] {
  border-color: var(--amber);
}

.banner[data-tone="lose"] {
  border-color: var(--hazard);
}

.banner p {
  margin: 0;
}

#bannerTitle {
  color: var(--phosphor);
  font-size: clamp(14px, 3.1vw, 22px);
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.banner[data-tone="win"] #bannerTitle {
  color: var(--amber-hot);
}

.banner[data-tone="lose"] #bannerTitle {
  color: var(--hazard);
}

#bannerSub {
  margin-top: 4px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.restart {
  position: absolute;
  bottom: 10%;
  left: 50%;
  z-index: 3;
  padding: 9px 20px;
  transform: translateX(-50%);
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  background: rgba(18, 11, 3, 0.92);
  color: var(--amber-hot);
  font: 700 11px/1 var(--ui);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
}

.restart:hover {
  background: var(--amber);
  color: #1b0f00;
}

.restart:focus-visible {
  outline: 2px solid var(--phosphor);
  outline-offset: 2px;
}

/* Console ──────────────────────────────────────────────────────────── */

.console {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 2px;
  min-height: 44px;
}

.readout {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 0;
}

.fuel {
  display: grid;
  gap: 4px;
  flex: 0 1 132px;
  min-width: 58px;
}

.fuel-track {
  position: relative;
  height: 6px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #04100c;
}

.fuel-track span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #2f9f74, var(--phosphor));
  transition: width 0.12s linear;
}

.fuel-track span[data-low="true"] {
  background: linear-gradient(90deg, #a23825, var(--hazard));
}

.ammo {
  display: grid;
  gap: 4px;
}

.ammo-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ammo-count {
  color: var(--amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.ammo-pips {
  display: flex;
  gap: 3px;
  min-height: 7px;
}

@container (max-width: 620px) {
  .ammo-pips {
    display: none;
  }
}

.pip {
  width: 9px;
  height: 7px;
  background: var(--amber);
  clip-path: polygon(0 100%, 45% 0, 100% 100%);
  transition: opacity 0.2s ease, background 0.2s ease;
}

.pip.spent {
  background: #27453a;
  opacity: 0.55;
}

.hint {
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.controls {
  display: flex;
  align-items: stretch;
  gap: 6px;
}

.controls button {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #10241d, #081511);
  color: var(--ink);
  font: 700 11px/1 var(--ui);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

.pad {
  width: 44px;
  min-height: 44px;
  color: var(--phosphor);
  font-size: 13px;
}

.thrust {
  width: 94px;
  min-height: 44px;
  border-color: var(--amber-hot);
  background: linear-gradient(180deg, var(--amber-hot), var(--amber));
  color: #1b0f00;
}

.controls button:active,
.controls button.is-held {
  transform: translateY(1px);
  filter: brightness(1.08);
}

.controls button:hover:not(:disabled) {
  border-color: var(--phosphor);
}

.controls button:disabled {
  opacity: 0.3;
  cursor: default;
  transform: none;
}

.controls button:focus-visible {
  outline: 2px solid var(--phosphor);
  outline-offset: 2px;
}

/* Compact frames ───────────────────────────────────────────────────── */

@container (max-width: 460px) {
  .hud-brand em {
    display: none;
  }

  .hint {
    display: none;
  }

  .console {
    gap: 8px;
  }

  .readout {
    gap: 8px;
  }

  .fuel {
    flex-basis: 84px;
    min-width: 50px;
  }
}

@container (max-width: 340px) {
  .best {
    display: none;
  }

  .hud-brand {
    font-size: 9px;
    letter-spacing: 0.16em;
  }

  .hud-value {
    font-size: 13px;
  }

  .pad {
    width: 40px;
    min-height: 40px;
  }

  .thrust {
    width: 82px;
    min-height: 40px;
    letter-spacing: 0.12em;
  }

  #bannerTitle {
    letter-spacing: 0.18em;
  }
}

@container (max-width: 300px) {
  .ammo {
    display: none;
  }

  .hud-brand {
    display: none;
  }

  .fuel {
    flex-basis: 52px;
  }

  .pad {
    width: 30px;
    min-height: 32px;
  }

  .thrust {
    width: 60px;
    min-height: 32px;
    font-size: 9px;
    letter-spacing: 0.08em;
  }

  .console {
    min-height: 32px;
  }

  .hud-value {
    font-size: 12px;
  }
}

@container (max-width: 240px) {
  .hud-key {
    display: none;
  }

  .fuel .hud-key {
    display: none;
  }

  .fuel {
    flex-basis: 40px;
  }
}

@media (max-height: 320px) {
  .app {
    gap: 4px;
    padding: 5px;
  }

  .hud {
    min-height: 18px;
  }

  .hud-value {
    font-size: 14px;
  }

  .console {
    min-height: 36px;
  }

  .controls button {
    min-height: 36px;
  }

  .pad {
    width: 38px;
  }

  .thrust {
    width: 82px;
  }

  .hint,
  .ammo .hud-key {
    display: none;
  }

  .ammo-pips {
    min-height: 6px;
  }

  .banner {
    padding: 6px 14px 7px;
  }
}

@media (max-height: 220px) {
  .app {
    gap: 3px;
    padding: 4px;
  }

  .hud-key {
    font-size: 8px;
  }

  .hud-brand em,
  .best,
  .hint,
  .ammo .hud-key {
    display: none;
  }

  .hud-value {
    font-size: 12px;
  }

  .controls button {
    min-height: 30px;
    font-size: 10px;
  }

  .pad {
    width: 32px;
  }

  .thrust {
    width: 62px;
  }

  .fuel {
    flex-basis: 68px;
  }

  .fuel-track {
    height: 4px;
  }

  .console {
    min-height: 30px;
  }

  #bannerTitle {
    font-size: 12px;
  }

  #bannerSub {
    font-size: 8px;
  }
}

@keyframes beacon {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

@keyframes banner-in {
  from {
    opacity: 0;
    transform: translate(-50%, -6px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand-mark {
    animation: none;
  }

  .banner.is-in {
    animation: none;
    opacity: 1;
  }

  .fuel-track span,
  .pip {
    transition: none;
  }
}

[hidden] {
  display: none !important;
}