.sd-shell { background: #fff; color: #1a1a1a; font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif; line-height: 1.7; }
.sd-shell * { box-sizing: border-box; }
.sd-container { max-width: 760px; margin: 0 auto; padding: 0 1rem; }
.sd-site-header { padding: 1.35rem 0 1rem; border-bottom: 1px solid #e0e0e0; background: #fff; }
.sd-sitename { margin: 0; font-size: 1.6rem; font-weight: 700; line-height: 1.25; }
.sd-sitename a { color: #1a1a1a; text-decoration: none; }
.sd-subtitle { margin: .2rem 0 0; color: #666; font-size: .9rem; }
.sd-nav { display: flex; flex-wrap: wrap; gap: .35rem 1rem; margin-top: .5rem; }
.sd-nav a { color: #0f766e; text-decoration: none; font-size: .9rem; font-weight: 600; }
.sd-safety { padding: .72rem 0; border-bottom: 1px solid #f5d08a; background: #fff8e6; color: #4a3511; }
.sd-safety .sd-container { display: grid; gap: .1rem; }
.sd-safety strong { color: #7a4b00; font-size: .86rem; }
.sd-safety span { font-size: .8rem; }
.sd-archive-footer { max-width: 880px; margin: 2rem auto 0; padding: 1rem 18px 1.5rem; border-top: 1px solid #2e3844; color: #949fac; font: 12px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.sd-archive-footer strong { color: #dbe2ea; }
.sd-archive-footer p { margin: .25rem 0 0; }
@media (prefers-color-scheme: dark) {
  .sd-shell { background: #14161a; color: #e8e8e8; }
  .sd-site-header { border-bottom-color: #2c2f36; background: #14161a; }
  .sd-sitename a { color: #e8e8e8; }
  .sd-subtitle { color: #9a9a9a; }
  .sd-nav a { color: #5eead4; }
  .sd-safety { border-bottom-color: #66501f; background: #241d0e; color: #ead7aa; }
  .sd-safety strong { color: #fbbf24; }
}