.purchase-section { max-width: 1040px; margin: 0 auto; padding: 128px 32px 96px; }
    .product { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 48px; align-items: stretch; }
    .product-media {
      min-width: 0; position: relative; border: 1px solid var(--border); border-radius: 14px;
      overflow: hidden; background: var(--bg-card); display: flex;
    }
    .product-media::before {
      content: ''; position: absolute; inset: 0;
      background: radial-gradient(ellipse 80% 60% at 70% 20%, rgba(201,168,64,0.12) 0%, transparent 70%);
      pointer-events: none; z-index: 1;
    }
    .product-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
    .product-info { position: relative; display: flex; flex-direction: column; min-width: 0; }
    .product-tag {
      align-self: flex-start; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.18em;
      text-transform: uppercase; color: var(--gold);
      border: 1px solid rgba(201,168,64,0.35); border-radius: 9999px;
      padding: 0.3rem 0.85rem; margin-bottom: 1.1rem;
    }
    .product-title { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.05; margin-bottom: 0.85rem; color: var(--cream); }
    .product-caption { display: grid; color: var(--muted); font-size: 0.95rem; line-height: 24px; margin-bottom: 24px; }
    .product-caption > span { grid-area: 1 / 1; }
    .product-caption-reserve { visibility: hidden; pointer-events: none; }
    .product-price { display: flex; align-items: baseline; gap: 0.4rem; margin-bottom: 1.5rem; }
    .price-amount { font-size: 2.75rem; font-weight: 800; color: var(--cream); }
    .price-unit { font-size: 1rem; font-weight: 600; color: var(--muted); }
    .price-each { font-size: 0.8rem; color: var(--muted); margin-left: 0.4rem; }
    .qty-row {
      display: flex; align-items: center; justify-content: space-between;
      padding: 1.1rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin-bottom: 1.5rem;
    }
    .qty-label { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--cream); }
    .qty { display: flex; align-items: center; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
    .qty-btn {
      width: 40px; height: 40px; background: var(--bg-card); border: none; color: var(--cream);
      font-size: 1.2rem; line-height: 1; cursor: pointer; transition: background 0.15s, color 0.15s;
    }
    .qty-btn:hover { background: rgba(201,168,64,0.12); color: var(--gold); }
    .qty-input {
      width: 56px; height: 40px; text-align: center; background: var(--bg); border: none;
      border-left: 1px solid var(--border); border-right: 1px solid var(--border);
      color: var(--cream); font-family: var(--font-sans); font-size: 0.95rem; outline: none;
    }
    .product-total { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; font-size: 0.85rem; color: var(--muted); }
    .product-total strong { font-size: 1.45rem; color: var(--cream); font-weight: 700; }
    .buy-feedback { position: absolute; top: 100%; left: 0; right: 0; min-height: 60px; margin-top: 16px; }
    .buy-error { margin: 0; font-size: 0.825rem; line-height: 20px; color: #fca5a5; }
    #buy-btn { min-height: 48px; }
    #product-plan { width: 100%; min-width: 0; margin: 8px 0 16px; }
    .product-fine { margin-top: 16px; font-size: 0.78rem; color: var(--muted); display: flex; align-items: center; gap: 0.4rem; }
    .product-fine svg { color: var(--gold); flex-shrink: 0; }
    @media (max-width: 820px) { .product { grid-template-columns: 1fr; } .product-media { aspect-ratio: 807 / 616; } }