/* 업데이트 공지 창 — 알파 관문과 로그인 화면 사이에 한 번 뜬다 */
.update-notice-backdrop {
  position: fixed; inset: 0; z-index: 3500;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  background: rgba(15, 23, 42, 0.55);
}
.update-notice {
  width: min(680px, 100%); max-height: min(86vh, 860px);
  display: flex; flex-direction: column; overflow: hidden;
  background: #fff; border-radius: 18px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
}

.un-head {
  padding: 22px 26px 16px;
  background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
  border-bottom: 1px solid #dbe4ef;
}
.un-badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--primary); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: 0.02em;
}
.un-head h2 { margin: 10px 0 4px; font-size: 21px; line-height: 1.35; color: #111827; }
.un-sub { margin: 0; font-size: 13px; color: #475467; }

.un-body { flex: 1; min-height: 0; overflow: auto; padding: 18px 26px 8px; }

/* 패치노트 본문(마크다운) */
.un-md { line-height: 1.7; font-size: 14.5px; color: #1f2937; }
.un-md h1 { font-size: 18px; margin: 4px 0 10px; }
.un-md h2 {
  font-size: 16px; margin: 22px 0 8px; padding-bottom: 6px; border-bottom: 1px solid #eef2f7; color: #111827;
}
.un-md h2:first-child { margin-top: 0; }
.un-md h3 { font-size: 14.5px; margin: 14px 0 6px; color: #1e3a8a; }
.un-md p { margin: 6px 0; }
.un-md ul { margin: 6px 0; padding-left: 20px; }
.un-md li { margin: 4px 0; }
.un-md code { background: #f3f4f6; padding: 1px 5px; border-radius: 5px; font-size: 90%; }
.un-md hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.un-md strong { color: #111827; }
.un-latest > p:first-child {
  margin: 0 0 14px; padding: 12px 14px; border-radius: 12px; background: #f8fafc; border: 1px solid #e5eaf1;
}

.un-older { margin: 26px 0 12px; padding-top: 16px; border-top: 2px solid #eef2f7; }
.un-older h3 { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.un-older-item { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; background: #fff; }
.un-older-item > summary { cursor: pointer; padding: 10px 14px; font-size: 14px; font-weight: 700; color: #344054; }
.un-older-item > summary:hover { color: var(--primary); }
.un-older-item[open] > summary { border-bottom: 1px solid #eef2f7; }
.un-older-item .un-md { padding: 10px 16px 12px; font-size: 13.5px; }
.un-quiet { margin: 0; font-size: 13px; color: var(--muted); }

.un-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 26px; border-top: 1px solid #eef2f7; background: #fbfcfe;
}
.un-foot-note { font-size: 12px; color: var(--muted); }
.un-foot .primary { flex: none; min-width: 120px; }

@media (max-width: 600px) {
  .update-notice-backdrop { padding: 10px; }
  .un-head, .un-body, .un-foot { padding-left: 16px; padding-right: 16px; }
  .un-head h2 { font-size: 18px; }
  .un-foot { flex-direction: column-reverse; align-items: stretch; }
  .un-foot-note { text-align: center; }
}