/* ============================================================
   Side Nav — минималистичное боковое меню справа (desktop only)
   ============================================================ */

.side-nav {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  z-index: 70;
  display: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 320ms var(--ease-out);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 2px 0;
}
.side-nav::-webkit-scrollbar { width: 0; height: 0; }

.side-nav.is-visible {
  opacity: 1;
  pointer-events: auto;
}

@media (min-width: 1200px) {
  .side-nav { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  .side-nav,
  .side-nav__link,
  .side-nav__link::after,
  .side-nav__label { transition: none; }
}

.side-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.side-nav__item {
  display: flex;
  justify-content: flex-end;
}

.side-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 3px 0;
  color: var(--fg-3);
  font: 500 12px/1.2 var(--font-sans);
  letter-spacing: -0.005em;
  white-space: nowrap;
  transition: color 200ms var(--ease-out);
  cursor: pointer;
}

.side-nav__link::after {
  content: '';
  display: block;
  width: 12px;
  height: 1px;
  background: var(--border-3, #B4B9C1);
  border-radius: 1px;
  transition: width 280ms var(--ease-out),
              height 280ms var(--ease-out),
              background-color 200ms var(--ease-out);
}

/* По умолчанию: компактный столбец из линий, подписи скрыты.
   На hover всей панели — подписи плавно выезжают. */
.side-nav__label {
  display: inline-block;
  max-width: 0;
  opacity: 0;
  transform: translateX(6px);
  overflow: hidden;
  transition: max-width 280ms var(--ease-out),
              opacity 220ms var(--ease-out),
              transform 220ms var(--ease-out);
  will-change: transform, opacity, max-width;
}

.side-nav:hover .side-nav__label,
.side-nav:focus-within .side-nav__label,
.side-nav__item.is-active .side-nav__label {
  max-width: 200px;
  opacity: 1;
  transform: none;
}

.side-nav__link:hover { color: var(--fg-1); }
.side-nav__link:hover::after { background: var(--fg-1); width: 16px; }

.side-nav__link:focus-visible {
  outline: 0;
  color: var(--fg-1);
}
.side-nav__link:focus-visible::after {
  box-shadow: var(--ring);
  background: var(--fg-1);
}

/* Активный раздел — accent + удлинённая жирная линия */
.side-nav__item.is-active .side-nav__link {
  color: var(--fg-1);
  font-weight: 600;
}
.side-nav__item.is-active .side-nav__link::after {
  width: 22px;
  height: 2px;
  background: var(--accent);
}