body { background-color: #e9e4f0; /* じゃがいもの花のような薄い紫 */ font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; color: #333; line-height: 1.9; padding: 3em 1.5em; max-width: 720px; margin: auto; } h1 { font-size: 1.8em; margin-bottom: 0.5em; border-bottom: 3px solid #c4b5d4; padding-bottom: 0.2…