:root {
  color-scheme: dark;
  --bg: #070d18;
  --panel: rgba(8, 18, 33, 0.84);
  --panel-border: #2d4260;
  --text: #eef4ff;
  --muted: #a8bad8;
  --accent: #507ef6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 40% -10%, #173a72, var(--bg) 62%);
  color: var(--text);
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid #284261;
  background: rgba(5, 11, 20, 0.86);
  backdrop-filter: blur(4px);
}

.topbar h1 {
  margin: 0;
  font-size: 1.05rem;
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.account-email {
  font-size: 0.8rem;
  color: var(--muted);
}

.link-btn {
  border: 1px solid #3b577b;
  border-radius: 7px;
  background: rgba(12, 24, 43, 0.9);
  color: #dce9ff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.52rem;
}

.shell {
  min-height: 100vh;
  padding-top: 3.7rem;
}

#game-canvas {
  width: 100%;
  height: calc(100vh - 3.7rem);
  display: block;
}

.panel {
  position: fixed;
  z-index: 4;
  border: 1px solid var(--panel-border);
  border-radius: 11px;
  background: var(--panel);
  backdrop-filter: blur(4px);
}

.status-panel {
  left: 0.8rem;
  top: 4.4rem;
  width: min(96vw, 520px);
  padding: 0.65rem 0.7rem;
}

.status {
  margin: 0 0 0.4rem;
  padding: 0.36rem 0.46rem;
  border-radius: 8px;
  border: 1px solid #35557f;
  font-size: 0.84rem;
}

.status.error {
  border-color: #8a4646;
  color: #ffd4d4;
}

.status.success {
  border-color: #4f8570;
  color: #d3ffe7;
}

.stats {
  margin: 0.22rem 0;
  font-size: 0.82rem;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin-top: 0.38rem;
}

input[type="text"] {
  border-radius: 7px;
  border: 1px solid #34537d;
  background: #0a1220;
  color: var(--text);
  padding: 0.35rem 0.45rem;
}

button {
  border: 0;
  border-radius: 8px;
  background: #23406b;
  color: #fff;
  font-weight: 600;
  padding: 0.4rem 0.58rem;
}

button.primary,
button.active {
  background: var(--accent);
}

.dpad {
  right: 0.8rem;
  bottom: 0.8rem;
  padding: 0.45rem;
}

.dpad-grid {
  display: grid;
  grid-template-columns: 58px 58px 58px;
  grid-template-rows: 52px 52px 52px;
  gap: 0.25rem;
}

.dpad-grid button {
  padding: 0;
  font-size: 0.85rem;
}

.dpad-grid .empty {
  visibility: hidden;
}

.legend {
  right: 0.8rem;
  top: 4.4rem;
  width: min(94vw, 335px);
  padding: 0.65rem;
}

.legend h3 {
  margin: 0 0 0.4rem;
  font-size: 0.9rem;
}

.legend p {
  margin: 0.18rem 0;
  font-size: 0.78rem;
  color: var(--muted);
}

@media (max-width: 900px), (pointer: coarse) {
  .shell {
    padding: 3.7rem 0.8rem 8rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
  }

  #game-canvas {
    height: min(62vh, calc(100dvh - 4.6rem));
  }

  .panel {
    position: static;
    width: auto;
  }

  .status-panel,
  .legend {
    top: auto;
    left: auto;
    right: auto;
    bottom: auto;
    width: auto;
  }

  .dpad {
    position: fixed;
    right: 0.8rem;
    bottom: 0.8rem;
    z-index: 6;
  }
}