:root{
  /* ---- radii — small and unfussy; nothing is pill-shaped except pills -- */
  --radius-xs:3px;
  --radius-sm:4px;
  --radius-md:6px;      /* the default card / panel radius */
  --radius-lg:8px;
  --radius-xl:12px;
  --radius-2xl:18px;    /* day cards only */
  --radius-pill:999px;

  /* The stone shape: a soft cobble silhouette used on primary actions.
     Not a rounded rectangle — opposite corners differ. */
  --radius-stone:14px 22px 14px 22px / 22px 14px 22px 14px;
  --radius-stone-sm:10px 16px 10px 16px / 16px 10px 16px 10px;

  /* Telegram bubbles: three round corners, one tucked */
  --radius-bubble-in:14px 14px 14px 4px;
  --radius-bubble-out:12px 12px 4px 12px;

  /* ---- borders -------------------------------------------------------- */
  --border-hair:1px solid var(--rule); /* @kind other */
  --border-firm:1px solid var(--rule-strong); /* @kind other */
  --border-dashed:1px dashed var(--rule-strong); /* @kind other */

  /* ---- shadows — flat, warm, never blue ------------------------------- */
  --shadow-card:0 8px 24px rgba(28,24,21,0.08);
  --shadow-slip:2px 3px 0 rgba(28,24,21,0.12);
  --shadow-lip:0 1px 0 var(--moss-deep);         /* pressable "lip" under actions */
  --shadow-lip-accent:0 1px 0 var(--ochre-deep);
}