/* offmode — elevation. 影なし枠線1px。写真カードのみ大きな柔らかい影。
   UI surfaces (buttons, FAQ rows, tables, chips) carry NO shadow — only a 1px hairline.
   Photography cards are the single exception: one large, very soft, low-opacity shadow. */
:root{
  --shadow-none:none;
  --shadow-photo:0 30px 60px -24px rgba(34,49,63,.30),0 6px 18px -12px rgba(34,49,63,.14);
  --shadow-photo-hover:0 38px 72px -24px rgba(34,49,63,.34),0 8px 20px -12px rgba(34,49,63,.16);
  --shadow-float:0 12px 32px -16px rgba(34,49,63,.22); /* floating theme toggle, overlay chips */
  --lift-hover:-2px;  /* hover は2px浮き */
}