.filter-sidebar {
  width: 17.5rem;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--space-lg) + 4rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.filter-sidebar__head {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-forest);
}
.filter-sidebar__head h2 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  margin: 0;
  flex: 1;
}
.filter-sidebar__reset {
  font-size: var(--text-xs);
  color: var(--color-terracotta-dark);
  font-weight: 600;
}
.filter-sidebar__reset:hover { text-decoration: underline; }

.filter-sidebar__group { margin-bottom: var(--space-md); display: flex; flex-direction: column; gap: var(--space-2xs); }
.filter-sidebar__group label { font-size: var(--text-xs); font-weight: 600; color: var(--color-ink-soft); text-transform: uppercase; letter-spacing: 0.03em; }
.filter-sidebar__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xs); }

.filter-sidebar input,
.filter-sidebar select {
  padding: 0.6rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-size: var(--text-sm);
  width: 100%;
  transition: border-color var(--duration-fast) var(--ease-out-expo);
}
.filter-sidebar input:focus,
.filter-sidebar select:focus { border-color: var(--color-forest); outline: none; }

.filter-sidebar__submit { width: 100%; margin-top: var(--space-xs); }

@media (max-width: 860px) {
  .filter-sidebar { position: static; width: 100%; top: auto; }
}