/* Shark Survival portal game styles */

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 16%, rgba(38, 120, 175, 0.24), transparent 45%),
    radial-gradient(circle at 78% 84%, rgba(14, 95, 118, 0.28), transparent 50%),
    linear-gradient(180deg, #0a1830 0%, #081328 50%, #050a16 100%);
}

#app {
  width: 100vw;
  height: 100vh;
}

#app canvas {
  display: block;
}

.hud {
  position: fixed;
  top: 0.9rem;
  right: 0.9rem;
  z-index: 80;
  min-width: 220px;
  padding: 0.7rem 0.8rem;
  border: 1px solid rgba(122, 197, 238, 0.45);
  border-radius: 12px;
  background: rgba(7, 21, 36, 0.82);
  color: #d6ecff;
  backdrop-filter: blur(4px);
  box-shadow: 0 10px 26px rgba(2, 8, 18, 0.45);
  font-family: "Trebuchet MS", Verdana, sans-serif;
  font-size: 0.87rem;
  line-height: 1.35;
}

.hud-row {
  display: flex;
  justify-content: space-between;
  gap: 0.7rem;
}

.hud-row + .hud-row {
  margin-top: 0.22rem;
}

.hud-key {
  color: #97bbd7;
}

.hud-value {
  color: #f2fbff;
  font-weight: 700;
}

.hud-tip {
  margin-top: 0.42rem;
  color: #8ec7ea;
  font-size: 0.75rem;
}

.portal-back {
  position: fixed;
  bottom: 0.9rem;
  left: 1rem;
  z-index: 90;
  color: #00c8c8;
  font-size: 0.85rem;
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 150ms ease;
}
.portal-back:hover { opacity: 1; }

@media (max-width: 700px) {
  .hud {
    left: 0.75rem;
    right: 0.75rem;
    top: 0.75rem;
    min-width: 0;
  }
}