* { box-sizing: border-box; }
body { margin: 0; background: #f4f1fa; color: #281a42; font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans JP', 'Yu Gothic', sans-serif; }
.demo { width: min(100%, 560px); margin: 0 auto; padding: 40px 24px; }
.label { font-size: 11px; letter-spacing: .16em; color: #746184; font-weight: 700; }
h1 { font-size: clamp(30px, 6vw, 40px); line-height: 1.5; letter-spacing: .03em; margin: 22px 0 12px; }
.lead, .hint { font-size: 13px; color: #796b89; line-height: 1.8; }
.controls { margin: 28px 0 20px; }
label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 8px; }
select { width: 100%; border: 1px solid #ded4e9; border-radius: 12px; padding: 13px; color: #3b2659; background: white; font: inherit; font-size: 14px; }
.home { position: relative; border-radius: 26px; background: #fff; border: 1px solid #e5deed; padding: 38px 22px 26px; text-align: center; box-shadow: 0 8px 0 #e9e2f2; }
.home-tag { display: block; color: #94839f; font-size: 11px; }
.game-mark { margin: 22px auto 10px; font-size: 48px; color: #9d7cc2; }
#source-title { font-weight: 800; margin: 0 0 28px; }
button { border: 0; color: white; background: #7853a6; border-radius: 16px; padding: 15px 26px; font: inherit; font-weight: 700; cursor: pointer; box-shadow: 0 4px 0 #573880; }
button span { font-size: 23px; vertical-align: -1px; margin-right: 6px; }
button:hover { background: #674491; }
.hint { text-align: center; margin: 24px 0 28px; }
details { font-size: 12px; line-height: 1.8; color: #70627e; }
summary { cursor: pointer; }
output, pre { display: block; white-space: pre-wrap; overflow-wrap: anywhere; background: #ebe5f2; padding: 14px; border-radius: 10px; font-size: 11px; }
:focus-visible { outline: 3px solid #0089b6; outline-offset: 4px; }