/* -------------------------------------------- 
ページ全体の共通スタイル 
--------------------------------------------- */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
body {
	font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
	line-height: 1.6;
	color: #333;
}
header {
	background: #2c3e50;
	color: white;
	padding: 1rem 0;
	box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
nav {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 20px;
	display: flex;
	justify-content: space-between;
	align-items: center;
}
nav ul {
	list-style: none;
	display: flex;
	gap: 2rem;
}
nav a {
	color: white;
	text-decoration: none;
	transition: color 0.3s;
}
nav a:hover {
	color: #3498db;
}
.hero {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	padding: 4rem 20px;
	text-align: center;
}
.hero h1 {
	font-size: 2.5rem;
	margin-bottom: 1rem;
}
.container {
	max-width: 1200px;
	margin: 2rem auto;
	padding: 0 20px;
}
.features {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 2rem;
	margin: 2rem 0;
}
.feature-card {
	background: white;
	padding: 2rem;
	border-radius: 8px;
	box-shadow: 0 2px 10px rgba(0,0,0,0.1);
	transition: transform 0.3s;
}
.feature-card:hover {
	transform: translateY(-5px);
}
.feature-card h3 {
	color: #2c3e50;
	margin-bottom: 1rem;
}
footer {
	background: #2c3e50;
	color: white;
	text-align: center;
	padding: 2rem 0;
	margin-top: 4rem;
}