.canvas-container {
  width: 100%;
  max-width: 497px;  /* 任意：元サイズ以上に拡大させたくない場合 */
}
.canvas-container canvas {
  display: block;
  width: 100%;
  height: auto;
}

.font_size_2rem{
	font-size: 2.0rem;
	font-weight: bold;
}
.font_size_3rem{
	font-size: 3.0rem;
	font-weight: bold;
}

.img-center{
	text-align: center;
}

.startbtn {
	font-size: 1.0rem;
	font-weight: 700;
	line-height: 0.3;
	position: relative;
	display: inline-block;
	padding: 1rem 1rem;
	margin: 5px 5px 10px 5px;
	cursor: pointer;
	text-align: center;
	vertical-align: middle;
	text-decoration: none;
	letter-spacing: 0.1em;
	width: 200px;
	height: 50px;
}
.startbtn-orange {
	color: #fff;
	/*background-color: #9A9A9A;*/
}
.startbtn-radius {
	border-radius: 2vh;
}

.backcolor-fastForward {
	background-color: #49d64e;
}


#status {
	font-size: 2.0rem;
	font-weight: bold;
	width: 350px;
}
/*STEP1からSTEP5のボタン*/
.step-nav {
	display: flex;
	flex-direction: row;
	align-items: stretch;
	justify-content: center;
	gap: 14px;
	flex-wrap: wrap;
	row-gap: 16px;
}
.step-btn {
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	width: 150px;
	padding: 14px 10px 12px;
	border: none;
	border-radius: 16px;
	color: #fff;
	cursor: pointer;
	transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}
.step-btn:hover {
	transform: translateY(-4px);
	filter: brightness(1.05);
}
.step-btn:active {
	transform: translateY(-1px);
}
.step-btn .step-num {
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	background: rgba(255, 255, 255, 0.25);
	padding: 2px 10px;
	border-radius: 999px;
	margin-bottom: 6px;
}
.step-btn .step-label {
	font-size: 0.95rem;
	font-weight: 600;
	line-height: 1.3;
	text-align: center;
}

/* 全ボタン共通：STEP1と同じブルー系グラデーションに統一 */
.step-btn {
	background: linear-gradient(145deg, #60a5fa, #2563eb);
	box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35), 0 1px 0 rgba(255, 255, 255, 0.4) inset;
}
.step-btn:hover {
	box-shadow: 0 8px 16px rgba(37, 99, 235, 0.45), 0 1px 0 rgba(255, 255, 255, 0.4) inset;
}