* { box-sizing: border-box; }

:root {
  color: #f7f7f7;
  background: #050505;
  font-family: "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
}

html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: #050505; }
button { font: inherit; }

.player { position: relative; width: 100vw; height: 100vh; background: #050505; }
.stage { display: grid; width: 100%; height: 100%; place-items: center; }
.gif { display: block; width: 100%; height: 100%; object-fit: contain; object-position: center; background: #050505; }

.hud {
  position: absolute;
  z-index: 10;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  left: max(18px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 18px;
  align-items: end;
  padding: 14px 16px;
  border: 1px solid rgb(255 255 255 / 18%);
  border-radius: 14px;
  background: rgb(0 0 0 / 76%);
  box-shadow: 0 8px 30px rgb(0 0 0 / 34%);
  backdrop-filter: blur(8px);
  transition: opacity 240ms ease, transform 240ms ease;
}

.player.idle .hud { opacity: 0; transform: translateY(12px); pointer-events: none; }
.identity { min-width: 0; }
.identity strong { display: block; overflow: hidden; font-size: clamp(16px, 2vw, 26px); text-overflow: ellipsis; white-space: nowrap; }
.identity span, .status-line { color: #d7d7d7; font-size: clamp(12px, 1.2vw, 15px); }
.status-line { display: flex; grid-column: 1; gap: 14px; flex-wrap: wrap; }
.controls { display: flex; grid-column: 2; grid-row: 1 / span 2; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.controls button, .error-panel button {
  min-height: 42px;
  padding: 8px 13px;
  color: #fff;
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: 9px;
  background: rgb(255 255 255 / 12%);
  cursor: pointer;
}
.controls button:hover, .controls button:focus-visible, .error-panel button:hover, .error-panel button:focus-visible { background: rgb(255 255 255 / 24%); outline: 2px solid #fff; outline-offset: 2px; }

.loading, .error-panel {
  position: absolute;
  z-index: 20;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 18px 24px;
  border-radius: 14px;
  background: rgb(0 0 0 / 82%);
  text-align: center;
}
.loading[hidden], .error-panel[hidden] { display: none; }
.error-panel { width: min(92vw, 560px); border: 1px solid #b95a5a; }
.error-panel h1 { margin: 0 0 12px; font-size: 22px; }
.error-panel p { overflow-wrap: anywhere; color: #ffdede; }

@media (max-width: 760px) {
  .hud { grid-template-columns: 1fr; }
  .controls { grid-column: 1; grid-row: auto; justify-content: flex-start; }
  .controls button { flex: 1 1 44%; }
}

@media (prefers-reduced-motion: reduce) {
  .hud { transition: none; }
}