/* 購入前の最終確認とログインのダイアログ（lab-checkout.js） */
.ck {
  width: min(640px, calc(100% - 24px)); max-height: calc(100dvh - 32px); padding: 0; border: 0; border-radius: var(--radius-lg);
  background: transparent; color: var(--text); overflow: visible;
}
.ck::backdrop { background: rgba(6, 5, 4, 0.72); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.ck[open] { animation: ckIn 0.5s var(--ease-out); }
@keyframes ckIn { from { opacity: 0; transform: translateY(18px) scale(0.98); } }
.ck__panel {
  position: relative; max-height: calc(100dvh - 32px); overflow: auto; overscroll-behavior: contain;
  border-radius: var(--radius-lg); border: 1px solid var(--line-2);
  background: linear-gradient(180deg, #1a1613, #110e0c); box-shadow: 0 40px 120px -30px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 138, 0, 0.08) inset;
}
.ck__form { padding: 28px clamp(18px, 4vw, 34px) 24px; }
.ck__head { position: relative; padding-right: 40px; }
.ck__eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; color: var(--orange-2); }
.ck__title { margin-top: 8px; font-size: clamp(20px, 3vw, 26px); }
.ck__x { position: absolute; top: -6px; right: -6px; width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line-2); color: var(--text-2); font-size: 18px; line-height: 1; }
.ck__x:hover { border-color: var(--orange); color: var(--text); }
.ck__rows { margin: 20px 0 0; border-top: 1px solid var(--line); }
.ck__rows > div { display: grid; grid-template-columns: 9.5em 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.ck__rows dt { font-size: 12.5px; color: var(--muted); }
.ck__rows dd { margin: 0; font-size: 14px; line-height: 1.7; }
.ck__rows dd b { font-weight: 700; color: var(--text); }
.ck__rows dd span { display: block; font-size: 12px; color: var(--muted); line-height: 1.6; margin-top: 2px; }
.ck__price { font-family: var(--font-en); font-size: 22px; letter-spacing: 0; color: var(--orange) !important; }
.ck__warn dt { color: var(--orange-2) !important; }
.ck__agree {
  display: flex; gap: 12px; align-items: flex-start; margin-top: 18px; padding: 14px 16px; border-radius: var(--radius);
  border: 1px solid rgba(255, 138, 0, 0.35); background: var(--orange-soft); font-size: 13.5px; line-height: 1.7; cursor: pointer;
}
.ck__agree input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--orange); flex: none; }
.ck__agree a { color: var(--orange-2); text-decoration: underline; text-underline-offset: 3px; }
.ck__actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.ck__actions .btn[disabled] { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
.ck__foot { margin-top: 12px; font-size: 12px; color: var(--muted); line-height: 1.7; }
.ck__msg { margin-top: 10px; font-size: 13px; color: var(--text-2); line-height: 1.7; min-height: 1em; }
.ck__msg a { color: var(--orange-2); text-decoration: underline; }
.ck__lead { margin-top: 12px; color: var(--text-2); font-size: 14px; line-height: 1.8; }
.ck__field { display: grid; gap: 8px; margin-top: 18px; font-size: 12.5px; color: var(--muted); }
.ck__field input {
  height: 46px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--ink); color: var(--text); font-size: 16px;
}
.ck__field input:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px var(--orange-soft); }
.ck__opt { display: flex; gap: 10px; align-items: center; margin-top: 12px; font-size: 13px; color: var(--text-2); }
.ck__opt input { accent-color: var(--orange); width: 18px; height: 18px; }
@media (max-width: 560px) {
  .ck__rows > div { grid-template-columns: 1fr; gap: 2px; }
  .ck__actions .btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) { .ck[open] { animation: none; } }