:root {
  color-scheme: dark;
  --cyan: #57f6ff;
  --green: #65ff9a;
  --amber: #ffd166;
  --red: #ff5a5f;
  --ink: #02070a;
  --panel: rgba(4, 18, 21, 0.68);
  --line: rgba(87, 246, 255, 0.32);
  --line-hot: rgba(255, 209, 102, 0.52);
  --text: #e9fbff;
  --muted: rgba(233, 251, 255, 0.62);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans JP", sans-serif;
  letter-spacing: 0;
  touch-action: none;
  user-select: none;
}

button {
  font: inherit;
}

.game-shell {
  position: fixed;
  inset: 0;
  min-width: 320px;
  background: var(--ink);
}

#gameCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.game-shell::after {
  display: none;
}

.hud,
.radar-panel,
.signal-banner,
.status-overlay {
  position: absolute;
  z-index: 5;
}

.hud-top {
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  right: max(14px, env(safe-area-inset-right));
  display: grid;
  grid-template-columns: minmax(170px, 0.75fr) minmax(360px, 2.5fr) auto;
  gap: 10px;
  align-items: stretch;
  pointer-events: none;
}

.system-brand,
.stat-cell,
.control-rack,
.radar-panel,
.overlay-frame {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(87, 246, 255, 0.12), transparent 38%),
    var(--panel);
  box-shadow:
    0 0 28px rgba(87, 246, 255, 0.08),
    inset 0 0 24px rgba(87, 246, 255, 0.05);
  backdrop-filter: blur(14px);
}

.system-brand {
  min-height: 66px;
  padding: 12px 14px;
  border-radius: 8px;
}

.brand-kicker,
.stat-cell span,
.radar-readout span,
.overlay-kicker {
  display: block;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.system-brand strong {
  display: block;
  margin-top: 5px;
  color: var(--cyan);
  font-size: clamp(1rem, 1.8vw, 1.45rem);
  line-height: 1;
  text-shadow: 0 0 14px rgba(87, 246, 255, 0.46);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(74px, 1fr));
  gap: 8px;
}

.stat-cell {
  min-height: 66px;
  padding: 10px 12px;
  border-radius: 8px;
  overflow: hidden;
}

.stat-cell strong {
  display: block;
  margin-top: 7px;
  color: var(--text);
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  line-height: 1;
  white-space: nowrap;
  text-shadow: 0 0 12px rgba(101, 255, 154, 0.22);
}

.control-rack {
  min-height: 66px;
  display: grid;
  grid-auto-flow: column;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border-radius: 8px;
  pointer-events: auto;
}

.icon-button,
.primary-command {
  border: 1px solid rgba(87, 246, 255, 0.45);
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(87, 246, 255, 0.16), rgba(87, 246, 255, 0.04)),
    rgba(3, 12, 16, 0.82);
  border-radius: 8px;
  cursor: pointer;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

.icon-button {
  position: relative;
  width: 46px;
  height: 46px;
}

.icon-button:hover,
.primary-command:hover {
  border-color: var(--amber);
  box-shadow: 0 0 18px rgba(255, 209, 102, 0.22);
}

.icon-button:active,
.primary-command:active {
  transform: translateY(1px);
}

.icon-reset,
.icon-audio {
  position: absolute;
  inset: 0;
  margin: auto;
}

.icon-reset {
  width: 22px;
  height: 22px;
  border: 2px solid var(--cyan);
  border-left-color: transparent;
  border-radius: 50%;
}

.icon-reset::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 1px;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--cyan);
  transform: rotate(-22deg);
}

.icon-audio {
  width: 25px;
  height: 22px;
}

.icon-audio::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 8px -5px 0 -1px var(--cyan), 8px 5px 0 -1px var(--cyan);
  clip-path: polygon(0 18%, 46% 18%, 100% 0, 100% 100%, 46% 82%, 0 82%);
}

.icon-audio::after {
  content: "";
  position: absolute;
  right: 1px;
  top: 3px;
  width: 12px;
  height: 16px;
  border: 2px solid var(--cyan);
  border-left: 0;
  border-radius: 0 16px 16px 0;
}

.is-muted .icon-audio::after {
  width: 18px;
  height: 2px;
  top: 10px;
  right: 0;
  border: 0;
  border-radius: 0;
  background: var(--red);
  transform: rotate(-42deg);
}

.radar-panel {
  display: none;
  left: max(14px, env(safe-area-inset-left));
  bottom: max(14px, env(safe-area-inset-bottom));
  width: 170px;
  padding: 12px;
  border-radius: 8px;
  pointer-events: none;
}

.radar-disc {
  position: relative;
  width: 108px;
  height: 108px;
  margin: 0 auto 10px;
  overflow: hidden;
  border: 1px solid rgba(101, 255, 154, 0.42);
  border-radius: 50%;
  background:
    radial-gradient(circle, transparent 0 23%, rgba(101, 255, 154, 0.12) 24% 25%, transparent 26% 48%, rgba(101, 255, 154, 0.1) 49% 50%, transparent 51%),
    linear-gradient(rgba(101, 255, 154, 0.18), rgba(101, 255, 154, 0.18)) 50% 0 / 1px 100% no-repeat,
    linear-gradient(90deg, rgba(101, 255, 154, 0.18), rgba(101, 255, 154, 0.18)) 0 50% / 100% 1px no-repeat,
    rgba(2, 12, 8, 0.66);
  box-shadow: inset 0 0 28px rgba(101, 255, 154, 0.18);
}

.radar-sweep {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: conic-gradient(from 0deg, rgba(101, 255, 154, 0.58), transparent 58deg);
  animation: sweep 2.4s linear infinite;
  mix-blend-mode: screen;
}

.radar-pip {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px var(--amber);
}

.pip-a {
  left: 29%;
  top: 36%;
}

.pip-b {
  left: 62%;
  top: 52%;
}

.pip-c {
  left: 48%;
  top: 24%;
}

.radar-readout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.radar-readout strong {
  color: var(--green);
  font-size: 1.05rem;
}

.signal-banner {
  top: 104px;
  left: 50%;
  min-width: min(520px, 82vw);
  padding: 10px 18px;
  border: 1px solid transparent;
  color: var(--amber);
  text-align: center;
  font-weight: 900;
  letter-spacing: 0.08em;
  transform: translate(-50%, -8px);
  opacity: 0;
  transition:
    opacity 220ms ease,
    transform 220ms ease;
  pointer-events: none;
}

.signal-banner.is-visible {
  border-color: rgba(255, 209, 102, 0.38);
  background: rgba(18, 10, 3, 0.58);
  box-shadow: 0 0 24px rgba(255, 209, 102, 0.12);
  opacity: 1;
  transform: translate(-50%, 0);
}

.status-overlay {
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 42%, rgba(87, 246, 255, 0.12), transparent 36%),
    rgba(0, 0, 0, 0.42);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 180ms ease,
    visibility 180ms ease;
  pointer-events: none;
}

.status-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.overlay-frame {
  width: min(520px, 92vw);
  padding: clamp(22px, 5vw, 42px);
  border-radius: 8px;
  text-align: center;
}

.overlay-frame h1 {
  margin: 10px 0 8px;
  color: var(--cyan);
  font-size: clamp(2.2rem, 8vw, 4.8rem);
  line-height: 0.92;
  text-shadow:
    0 0 22px rgba(87, 246, 255, 0.44),
    0 0 46px rgba(87, 246, 255, 0.18);
}

.overlay-frame p {
  min-height: 1.35em;
  margin: 0 0 24px;
  color: var(--muted);
  font-weight: 700;
}

.primary-command {
  min-width: 156px;
  min-height: 46px;
  padding: 0 22px;
  color: var(--ink);
  background: linear-gradient(180deg, var(--amber), #f59f32);
  border-color: rgba(255, 209, 102, 0.8);
  font-weight: 1000;
  letter-spacing: 0.08em;
}

@keyframes sweep {
  to {
    transform: rotate(1turn);
  }
}

@media (max-width: 880px) {
  .hud-top {
    grid-template-columns: 1fr auto;
  }

  .system-brand {
    display: none;
  }

  .stat-grid {
    grid-template-columns: repeat(3, minmax(72px, 1fr));
  }

  .radar-panel {
    width: 132px;
  }

  .radar-disc {
    width: 82px;
    height: 82px;
  }
}

@media (max-width: 560px) {
  .hud-top {
    top: max(8px, env(safe-area-inset-top));
    left: max(8px, env(safe-area-inset-left));
    right: max(8px, env(safe-area-inset-right));
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .stat-grid {
    grid-template-columns: repeat(3, minmax(64px, 1fr));
    gap: 6px;
  }

  .stat-cell {
    min-height: 54px;
    padding: 8px 9px;
  }

  .stat-cell span {
    font-size: 0.58rem;
  }

  .stat-cell strong {
    margin-top: 5px;
    font-size: 0.98rem;
  }

  .control-rack {
    position: fixed;
    right: max(10px, env(safe-area-inset-right));
    bottom: max(10px, env(safe-area-inset-bottom));
    min-height: 0;
    padding: 7px;
  }

  .radar-panel {
    display: none;
  }

  .signal-banner {
    top: 206px;
    font-size: 0.78rem;
  }
}