:root {
  --bg-color: #0f111a;
  --surface-color: #1e2235;
  --surface-border: #2f3654;
  --text-main: #f0f3f9;
  --text-muted: #8a94a6;
  --color-safe: #00f3ff;
  --color-warn: #ff007f;
  --color-node: #ffffff;
  --btn-bg: #111a2f;
  --btn-border: #2c4f7b;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  min-height: 100%;
  margin: 0;
  background: radial-gradient(circle at 20% 0%, #1a2140 0%, #0f111a 50%, #080a11 100%);
  color: var(--text-main);
  font-family: "Pretendard", "Noto Sans KR", system-ui, -apple-system, sans-serif;
}

body {
  overflow: auto;
}

.app-shell {
  height: 100dvh;
  max-height: 100dvh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 10px;
  padding-top: max(10px, env(safe-area-inset-top));
  padding-right: max(10px, env(safe-area-inset-right));
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  padding-left: max(10px, env(safe-area-inset-left));
}

.hud {
  background: linear-gradient(180deg, rgba(30, 34, 53, 0.96), rgba(22, 25, 40, 0.9));
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 10px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.hud__title {
  margin: 0;
  font-size: 1rem;
  line-height: 1.1;
}

.hud__subtitle {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hud__center,
.hud__right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.chip {
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(11, 16, 31, 0.9);
  border: 1px solid #2a3558;
  font-size: 0.9rem;
}

.chip--warn strong {
  color: var(--color-warn);
}

.chip strong {
  color: var(--color-safe);
}

.playfield {
  min-height: 0;
  height: 100%;
}

.canvas-wrap {
  position: relative;
  height: 100%;
  min-height: 240px;
  border-radius: 16px;
  border: 1px solid #222a45;
  background: linear-gradient(160deg, rgba(5, 8, 20, 0.95), rgba(16, 20, 36, 0.98));
  overflow: hidden;
  box-shadow: inset 0 0 40px rgba(0, 243, 255, 0.04);
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.toast {
  position: absolute;
  left: 50%;
  top: 16px;
  transform: translateX(-50%);
  pointer-events: none;
  background: rgba(8, 10, 18, 0.9);
  border: 1px solid #2b3254;
  border-radius: 999px;
  color: var(--text-main);
  padding: 8px 14px;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 220ms ease;
}

.toast.is-visible {
  opacity: 1;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  min-height: 46px;
  flex: 1 1 140px;
  border: 1px solid var(--btn-border);
  border-radius: 12px;
  color: var(--text-main);
  background: linear-gradient(180deg, #132241, #0e1a32);
  font-size: 0.92rem;
  font-weight: 600;
}

.btn:active {
  transform: translateY(1px);
}

.btn--ghost {
  background: var(--btn-bg);
}

.btn--accent {
  border-color: #2f7ea3;
  background: linear-gradient(180deg, #134053, #0f2f3d);
}

.btn:disabled {
  opacity: 0.45;
}

.platform-badge {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #2f4263;
  background: rgba(17, 26, 47, 0.9);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.platform-btn {
  min-height: 44px;
  border: 1px solid #26558f;
  color: var(--text-main);
  background: #11284a;
  border-radius: 10px;
  padding: 8px 12px;
}

.leaderboard-panel {
  width: min(360px, calc(100vw - 36px));
  border: 1px solid #2f4263;
  border-radius: 12px;
  padding: 10px;
  background: rgba(9, 15, 29, 0.95);
  box-shadow: var(--shadow);
}

.leaderboard-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.leaderboard-head h2 {
  margin: 0;
  font-size: 0.95rem;
}

.leaderboard-actions {
  display: flex;
  gap: 6px;
}

.leaderboard-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(17, 26, 47, 0.8);
  border: 1px solid #293e60;
  font-size: 0.82rem;
}

.leaderboard-row strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-empty {
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 8px 4px;
}

@media (min-width: 900px) {
  .app-shell {
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 12px;
    padding: 16px;
  }

  .hud {
    grid-template-columns: minmax(220px, 1fr) auto auto;
    align-items: center;
    gap: 12px;
    padding: 12px;
  }

  .controls {
    max-width: 760px;
    justify-self: start;
  }
}