.sidebar {
  display: flex;
  flex-direction: column;
  min-block-size: 0;
  border-block-end: 1px solid var(--color-line-soft);
  background: var(--color-page);
}

.sidebar__top {
  display: flex;
  flex: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-block-size: 64px;
  padding-inline: var(--gutter);
}

.sidebar__collapse {
  display: none;
  flex: none;
  place-items: center;
  inline-size: 36px;
  block-size: 36px;
  padding: 0;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius);
  background: none;
  color: var(--color-text-faint);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.sidebar__collapse:hover {
  border-color: var(--color-line);
  color: var(--color-text);
}

.sidebar__collapse .sidebar__icon {
  inline-size: 18px;
  block-size: 18px;
  transition: transform 0.25s var(--ease-out);
}

.sidebar__nav {
  display: flex;
  flex: none;
  padding-inline: calc(var(--gutter) - 20px);
  overflow-x: auto;
  scrollbar-width: none;
}

.sidebar__link {
  position: relative;
  display: flex;
  flex: none;
  align-items: center;
  gap: 12px;
  min-block-size: 52px;
  padding-inline: 20px;
  color: var(--color-text-soft);
  font: 400 16px/1.2 var(--font-sans);
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}

.sidebar__link:hover {
  color: var(--color-text);
}

.sidebar__link::before {
  content: "";
  position: absolute;
  inset-block-end: 0;
  inset-inline: 20px;
  block-size: 2px;
  background: var(--color-accent);
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.2s, transform 0.25s var(--ease-out);
}

.sidebar__link--active {
  color: var(--color-text);
  font-weight: 650;
}

.sidebar__link--active::before {
  opacity: 1;
  transform: none;
}

.sidebar__icon {
  flex: none;
  inline-size: 22px;
  block-size: 22px;
}

.sidebar__link--active .sidebar__icon {
  stroke-width: 2;
}

.sidebar__icon--image {
  opacity: 0.75;
  transition: opacity 0.15s;
}

.sidebar__link:hover .sidebar__icon--image,
.sidebar__link--active .sidebar__icon--image {
  opacity: 1;
}

.sidebar__foot {
  display: none;
}

.sidebar__actions {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar__github {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-block-size: 36px;
  padding-inline: 14px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.15s;
}

.sidebar__github:hover {
  background: var(--color-accent-hover);
}

.sidebar__github .sidebar__icon {
  inline-size: 18px;
  block-size: 18px;
}

.sidebar__social {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  inline-size: 36px;
  min-block-size: 36px;
  border: 1px solid var(--color-line);
  color: var(--color-text-soft);
  transition: color 0.15s, border-color 0.15s;
}

.sidebar__social:hover {
  border-color: var(--color-light);
  color: var(--color-text);
}

.sidebar__social .sidebar__icon {
  inline-size: 14px;
  block-size: 14px;
}

@media (min-width: 940px) {
  .sidebar {
    position: sticky;
    inset-block-start: 0;
    inline-size: 264px;
    block-size: 100dvh;
    border-block-end: 0;
    border-inline-end: 1px solid var(--color-line-soft);
    transition: inline-size 0.25s var(--ease-out);
  }

  .sidebar__top {
    min-block-size: 72px;
    padding-inline: 28px 18px;
  }

  .sidebar__top .sidebar__actions {
    display: none;
  }

  .js .sidebar__collapse {
    display: grid;
  }

  .sidebar__nav {
    display: grid;
    flex: 1;
    align-content: start;
    gap: var(--space-xs);
    padding-block: var(--space-lg);
    padding-inline: 0;
    overflow-x: hidden;
    overflow-y: auto;
  }

  .sidebar__link {
    gap: 18px;
    inline-size: 100%;
    padding-inline: 30px 20px;
    font-size: 17px;
  }

  .sidebar__link::before {
    inset-block: 14px;
    inset-inline: 0 auto;
    inline-size: 2px;
    block-size: auto;
    transform: scaleY(0.4);
  }

  .sidebar__icon {
    inline-size: 24px;
    block-size: 24px;
  }

  .sidebar__foot {
    display: flex;
    flex: none;
    align-items: center;
    gap: var(--space-sm);
    min-block-size: 72px;
    padding-inline: 26px 20px;
    border-block-start: 1px solid var(--color-line-soft);
  }

  .sidebar__foot .sidebar__github {
    flex: 1;
  }

  .sidebar--collapsed {
    inline-size: 84px;
  }

  .sidebar--collapsed .sidebar__label {
    display: none;
  }

  .sidebar--collapsed .sidebar__top {
    flex-direction: column;
    justify-content: center;
    min-block-size: 124px;
    padding-inline: 0;
  }

  .sidebar--collapsed .sidebar__collapse .sidebar__icon {
    transform: rotate(180deg);
  }

  .sidebar--collapsed .sidebar__foot {
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
    min-block-size: 0;
    padding-block: var(--space-xl);
    padding-inline: 0;
  }

  .sidebar--collapsed .sidebar__foot .sidebar__github,
  .sidebar--collapsed .sidebar__foot .sidebar__social {
    flex: none;
    inline-size: 44px;
    min-block-size: 44px;
    padding-inline: 0;
  }
}