diff --git a/ordinis-admin-ui/src/components/audit/PeriodFilter.tsx b/ordinis-admin-ui/src/components/audit/PeriodFilter.tsx
index e8a8a04..f8bc94b 100644
--- a/ordinis-admin-ui/src/components/audit/PeriodFilter.tsx
+++ b/ordinis-admin-ui/src/components/audit/PeriodFilter.tsx
@@ -269,7 +269,7 @@ export function PeriodFilter({ value, onChange, label, disabled }: PeriodFilterP
                     mode="range"
                     selected={dpRange}
                     onSelect={handleSelect}
-                    numberOfMonths={2}
+                    numberOfMonths={1}
                     showOutsideDays
                     weekStartsOn={1}
                     className="ord-day-picker"
diff --git a/ordinis-admin-ui/src/styles.css b/ordinis-admin-ui/src/styles.css
index c7e0d2c..a8abdcd 100644
--- a/ordinis-admin-ui/src/styles.css
+++ b/ordinis-admin-ui/src/styles.css
@@ -443,3 +443,112 @@ body {
     animation: none;
   }
 }
+
+/* === react-day-picker — кастомизация под ordinis design system.
+ * Без этих overrides DayPicker рендерится дефолтными rdp-* стилями
+ * (большие квадратные ячейки, нет hover/selected состояний под наш
+ * accent). Класс `.ord-day-picker` ставится на корень DayPicker'а
+ * в DateRangePicker и PeriodFilter. === */
+.ord-day-picker {
+  --rdp-day-width: 2rem;
+  --rdp-day-height: 2rem;
+  --rdp-day_button-width: 2rem;
+  --rdp-day_button-height: 2rem;
+  --rdp-day_button-border-radius: 6px;
+  --rdp-months-gap: 1rem;
+  --rdp-nav_button-height: 1.75rem;
+  --rdp-nav_button-width: 1.75rem;
+  --rdp-weekday-text-transform: lowercase;
+  --rdp-weekday-padding: 0.25rem 0;
+  --rdp-month_caption-font: 600 0.875rem/1.25 'Inter', sans-serif;
+  --rdp-day-font: 400 0.8125rem/1 'JetBrains Mono', monospace;
+  --rdp-weekday-font: 500 0.7rem/1 'Inter', sans-serif;
+  --rdp-accent-color: var(--color-accent);
+  --rdp-accent-background-color: var(--color-accent-bg);
+  font-family: 'Inter', sans-serif;
+  color: var(--color-ink);
+}
+
+/* Multi-month layout (если когда-то нужно): 2 столбца side-by-side
+ * вместо wrap'а вниз. */
+.ord-day-picker .rdp-months {
+  flex-wrap: nowrap;
+}
+
+.ord-day-picker .rdp-month_caption {
+  padding: 0 0 0.5rem;
+  color: var(--color-ink);
+}
+
+.ord-day-picker .rdp-weekday {
+  color: var(--color-mute);
+  text-transform: lowercase;
+  font-weight: 500;
+}
+
+.ord-day-picker .rdp-day_button {
+  border-radius: 6px;
+  transition: background-color 120ms, color 120ms;
+}
+
+.ord-day-picker .rdp-day_button:hover:not(:disabled):not([aria-disabled='true']) {
+  background-color: var(--color-surface-2);
+  color: var(--color-ink);
+}
+
+.ord-day-picker .rdp-day.rdp-outside .rdp-day_button {
+  color: var(--color-mute);
+  opacity: 0.55;
+}
+
+.ord-day-picker .rdp-day.rdp-today .rdp-day_button {
+  font-weight: 600;
+  outline: 1px solid var(--color-line-2, var(--color-line));
+  outline-offset: -2px;
+}
+
+/* Selected range */
+.ord-day-picker .rdp-day.rdp-selected .rdp-day_button {
+  background-color: var(--color-accent);
+  color: var(--color-on-accent, white);
+  font-weight: 500;
+}
+
+.ord-day-picker .rdp-day.rdp-range_middle .rdp-day_button {
+  background-color: var(--color-accent-bg);
+  color: var(--color-accent);
+  border-radius: 0;
+}
+
+.ord-day-picker .rdp-day.rdp-range_start .rdp-day_button {
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
+}
+
+.ord-day-picker .rdp-day.rdp-range_end .rdp-day_button {
+  border-top-left-radius: 0;
+  border-bottom-left-radius: 0;
+}
+
+.ord-day-picker .rdp-day.rdp-range_start.rdp-range_end .rdp-day_button {
+  border-radius: 6px;
+}
+
+/* Nav buttons */
+.ord-day-picker .rdp-button_previous,
+.ord-day-picker .rdp-button_next {
+  border-radius: 6px;
+  color: var(--color-accent);
+  transition: background-color 120ms;
+}
+
+.ord-day-picker .rdp-button_previous:hover,
+.ord-day-picker .rdp-button_next:hover {
+  background-color: var(--color-surface-2);
+}
+
+.ord-day-picker .rdp-button_previous:disabled,
+.ord-day-picker .rdp-button_next:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+}