* { box-sizing: border-box; }
body { margin: 0; background: #f7f7f5; color: #262626; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", sans-serif; }
.container { max-width: 1050px; margin: auto; padding: 40px 20px; }
header { text-align: center; margin-bottom: 42px; }
.eyebrow { letter-spacing: .2em; font-size: 12px; color: #777; }
h1 { font-size: clamp(24px, 4vw, 36px); margin: 12px 0; }
header p, #detail-description { color: #666; }
.plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.plan-card { border: 1px solid #e6e6e6; background: white; border-radius: 14px; overflow: hidden; padding: 0; cursor: pointer; text-align: left; transition: transform .2s, box-shadow .2s; color: inherit; font: inherit; }
.plan-card:hover, .plan-card:focus-visible { transform: translateY(-3px); box-shadow: 0 8px 24px #00000012; }
.plan-card img, .card-placeholder { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
.card-placeholder, .placeholder { background: linear-gradient(135deg,#eae5dc,#d9dfdd); color: #6c706e; display: flex; align-items: center; justify-content: center; text-align: center; padding: 20px; }
.card-text { padding: 18px; }
.card-text h2 { margin: 0 0 6px; font-size: 20px; }
.card-text p { margin: 0; color: #777; font-size: 14px; }
.back-button, .angle-buttons button { background: white; border: 1px solid #d6d6d6; border-radius: 9px; padding: 11px 16px; cursor: pointer; font: inherit; }
.back-button:hover, .angle-buttons button:hover { background: #eee; }
#detail-view { max-width: 800px; margin: auto; }
#detail-view h2 { margin-top: 30px; }
.detail-image-wrap { margin-top: 22px; }
#detail-image, #detail-placeholder { width: 100%; aspect-ratio: 16/10; object-fit: contain; border-radius: 12px; background: #e9e9e9; }
.angle-buttons { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.angle-buttons button.active { background: #303c37; color: white; border-color: #303c37; }
.note, footer { color: #888; font-size: 12px; }
footer { text-align: center; margin-top: 65px; }
[hidden] { display: none !important; }
@media (max-width: 650px) { .plan-grid { grid-template-columns: 1fr; } .container { padding: 26px 16px; } .plan-card img, .card-placeholder { aspect-ratio: 16/9; } }