* {
  box-sizing: border-box;
}

:root {
  --safe-area-top: 0px;
  --safe-area-bottom: 0px;
  --app-viewport-height: 100vh;
}

@supports (padding-top: env(safe-area-inset-top)) {
  :root {
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-bottom: env(safe-area-inset-bottom);
  }
}

html {
  height: 100%;
  min-height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: radial-gradient(circle at top, #202733 0%, #10141d 60%, #07090f 100%);
  color: #f4f7ff;
  --body-padding: 2rem;
  height: var(--app-viewport-height);
  min-height: var(--app-viewport-height);
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding-inline: var(--body-padding);
  padding-top: calc(var(--body-padding) + var(--safe-area-top));
  padding-bottom: calc(var(--body-padding) + var(--safe-area-bottom));
}


.layout {
  display: grid;
  height: 100%;
  max-height: 100%;
  gap: 1.5rem;
  grid-template-columns: minmax(320px, 420px) minmax(200px, 280px);
  align-items: stretch;
  overflow: hidden;
}

.game-shell {
  position: relative;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.7) 100%);
  border-radius: 20px;
  padding: 1rem 1rem calc(0.5rem + var(--safe-area-bottom));
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  height: 100%;
  max-height: 100%;
}

.hud {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  flex-shrink: 0;
}

.hud-panel {
  background: rgba(17, 24, 39, 0.65);
  padding: 0.6rem 0.9rem;
  border-radius: 12px;
  min-width: 90px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.label {
  display: block;
  font-size: 0.75rem;
  opacity: 0.7;
}

.value {
  font-size: 1.2rem;
  font-weight: 600;
}

#game {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  background: #090c14;
  border: 1px solid rgba(255, 255, 255, 0.08);
  margin-inline: auto;
  flex: 1 1 auto;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  border-radius: 16px;
  backdrop-filter: blur(4px);
}

.overlay.hidden {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.overlay h1 {
  margin: 0;
  font-size: 2.4rem;
  letter-spacing: 0.05em;
}

.overlay p {
  max-width: 280px;
  margin: 1.4rem 0 1.8rem;
  line-height: 1.6;
}

.btn {
  background: linear-gradient(135deg, #ff4d4d, #ff824d);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.8rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(255, 77, 77, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover,
.btn:active {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(255, 77, 77, 0.45);
}

.controls {
  display: none;
  margin-top: 0.75rem;
  gap: 1rem;
  padding-bottom: var(--safe-area-bottom);
  flex-shrink: 0;
  justify-content: center;
}

.touch-btn {
  flex: 1;
  padding: 0.9rem 0;
  font-size: 1.2rem;
  background: rgba(76, 86, 106, 0.4);
  box-shadow: none;
}

.touch-btn:active {
  background: rgba(255, 130, 77, 0.55);
}

.jump-btn {
  background: rgba(45, 212, 191, 0.6);
  font-size: 1.4rem;
  font-weight: 600;
}

.jump-btn:active {
  background: rgba(45, 212, 191, 0.85);
}

.sidebar {
  background: rgba(10, 15, 26, 0.7);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  align-self: stretch;
  overflow: auto;
}

.sidebar h2 {
  margin-top: 0;
  font-size: 1.5rem;
}

.sidebar ul {
  padding-left: 1.1rem;
  line-height: 1.6;
}

@media (max-width: 900px) {
  body {
    --body-padding: 1.2rem;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: -1;
  }
}

@media (max-width: 520px) {
  body {
    --body-padding: 0.5rem;
  }

  .layout {
    gap: 1rem;
  }

  .sidebar {
    display: none;
  }

  .controls {
    display: flex;
  }

  .hud {
    gap: 0.5rem;
  }

  .hud-panel {
    flex: 1;
    min-width: unset;
  }
}