/* --- リセット＆共通 --- */
	* { margin: 0; padding: 0; box-sizing: border-box; }
	html, body { width: 100%; height: 100%; overflow: hidden; background: #fff; }

	/* --- ローディングオーバーレイ --- */
	#loader {
		position: fixed;
		inset: 0;
		display: flex;
		align-items: center;
		justify-content: center;
		background: #fff;
		z-index: 1000;
	}
	.spinner {
		width: 60px; height: 60px;
		border: 6px solid #999;
		border-top-color: transparent;
		border-radius: 50%;
		animation: spin 1s linear infinite;
	}
	@keyframes spin { to { transform: rotate(360deg); } }

	/* --- 全画面動画 --- */
	#introVideo {
		position: fixed;
		inset: 0;
		width: 100%;
		height: 100%;
		object-fit: cover;
	}

	/* --- スキップボタン --- */
	#skipBtn {
		position: fixed;
		right: 24px;
		bottom: 24px;
		padding: 12px 24px;
		font-size: 16px;
		border: none;
		border-radius: 4px;
		background: rgba(0, 0, 0, 0.6);
		color: #fff;
		cursor: pointer;
		z-index: 1100;
		transition: background 0.2s;
	}
	#skipBtn:hover { background: rgba(0, 0, 0, 0.8); }