/* ─────────────────────────────────────────────────────
   Module Sidebar Navigation
   Shared sidebar component for all modules.
   ───────────────────────────────────────────────────── */

:root {
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 68px;
  --sidebar-bg: var(--ynk-surface);
  --sidebar-bg-hover: var(--ynk-surface-active);
  --sidebar-text: var(--ynk-text-muted, #4b5563);
  --sidebar-text-hover: var(--ynk-text, #111827);
  --sidebar-text-active: var(--ynk-primary, #3b00ff);
  --sidebar-active-bg: var(--ynk-primary-light, #f0ecff);
  --sidebar-divider: var(--ynk-border-light, #e5e7eb);
  --sidebar-transition: var(--ynk-duration-slow) var(--ynk-ease-out);
  --sidebar-z-index: var(--ynk-z-sidebar);
  --brand-bar-height: 80px;
  --footer-height: 3.5rem;
}

/* ── Shell Flex Layout ────────────────────────────── */

.module-shell {
  display: flex;
  background: linear-gradient(180deg, var(--ynk-surface-secondary) 0%, #f5f7fb 58%, var(--ynk-surface-hover) 100%);
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.module-main-content {
  flex: 1;
  min-width: 0;
  background: linear-gradient(180deg, var(--ynk-surface-secondary) 0%, #f5f7fb 58%, var(--ynk-surface-hover) 100%);
  overflow-y: auto;
  height: 100%;
}

/* ── Sidebar Container ────────────────────────────── */

.module-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  align-self: stretch;
  overflow: hidden;
  z-index: var(--sidebar-z-index);
  display: flex;
  flex-direction: column;
  margin: 0.5rem 0 0.25rem 0.75rem;
  border-radius: var(--ynk-radius-lg, 12px);
  border: 1px solid var(--sidebar-divider);
  box-shadow: var(--ynk-shadow-xs);
  transition: width var(--sidebar-transition);
}

.module-sidebar__content {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  padding: 0.75rem 0 0.25rem;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

.module-sidebar__footer {
  flex-shrink: 0;
  padding: 0 0 0.25rem;
}

/* ── Scrollbar ────────────────────────────────────── */

.module-sidebar__content::-webkit-scrollbar {
  width: 3px;
}

.module-sidebar__content::-webkit-scrollbar-track {
  background: transparent;
}

.module-sidebar__content::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.08);
  border-radius: 2px;
}

/* ── Navigation List ──────────────────────────────── */

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav__item {
  margin: 0 0.5rem 0.15rem;
}

.sidebar-nav__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.8rem;
  border-radius: var(--ynk-radius-sm, 6px);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  font-family: var(--ynk-font);
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-nav__link:hover {
  background: var(--sidebar-bg-hover);
  color: var(--sidebar-text-hover);
  text-decoration: none;
}

.sidebar-nav__link.is-active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-text-active);
  font-weight: 600;
}

/* ── Icons ────────────────────────────────────────── */

.sidebar-nav__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.15s ease;
}

.sidebar-nav__link:hover .sidebar-nav__icon {
  opacity: 0.85;
}

.sidebar-nav__link.is-active .sidebar-nav__icon {
  opacity: 1;
  color: var(--sidebar-text-active);
}

/* ── Section Label ────────────────────────────────── */

.sidebar-nav__label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ynk-text-subtle, #6b7280);
  opacity: 0.6;
  padding: 0.5rem 1.3rem 0.3rem;
  font-family: var(--ynk-font);
  white-space: nowrap;
  transition: opacity var(--sidebar-transition);
  line-height: 1.6;
}

/* ── Collapsible Group Labels ────────────────────── */

.sidebar-nav__group {
  display: block;
}

.sidebar-nav__group-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: calc(100% - 1rem);
  margin: 0 0.5rem 0.15rem;
  padding: 0.5rem 0.8rem 0.3rem 1.3rem;
  border: 0;
  background: transparent;
  color: var(--ynk-text-subtle, #6b7280);
  cursor: pointer;
  text-align: left;
  font-family: var(--ynk-font);
  transition: color 0.15s ease;
}

.sidebar-nav__group-toggle:hover {
  color: var(--sidebar-text-hover);
}

.sidebar-nav__group-toggle:focus-visible {
  outline: 2px solid rgba(59, 0, 255, 0.22);
  outline-offset: 2px;
  border-radius: var(--ynk-radius-sm, 6px);
}

.sidebar-nav__group-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.72;
  line-height: 1.6;
  white-space: nowrap;
}

.sidebar-nav__group-chevron {
  flex-shrink: 0;
  opacity: 0.55;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.sidebar-nav__group.is-open .sidebar-nav__group-chevron {
  transform: rotate(180deg);
  opacity: 0.9;
}

.sidebar-nav__group-body {
  display: block;
}

.sidebar-nav__group:not(.is-open) .sidebar-nav__group-body {
  display: none;
}

/* ── Divider ──────────────────────────────────────── */

.sidebar-nav__divider {
  height: 1px;
  background: var(--sidebar-divider);
  margin: 0.5rem 1rem;
}

/* ── Spacer ───────────────────────────────────────── */

.sidebar-nav__spacer {
  flex: 1;
}

/* ── Collapse Toggle Button ───────────────────────── */

.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
  width: auto;
  height: 28px;
  margin: 0 0.5rem 0.5rem;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--ynk-radius-sm, 6px);
  cursor: pointer;
  color: var(--ynk-text-subtle, #6b7280);
  opacity: 0.55;
  transition: opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease, transform var(--sidebar-transition);
  padding: 0 0.5rem;
  flex-shrink: 0;
}

.sidebar-collapse-btn span {
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--ynk-font);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-collapse-btn:hover {
  opacity: 1;
  background: var(--sidebar-bg-hover);
  border-color: var(--sidebar-divider);
}

/* ── Collapsed State ──────────────────────────────── */

.module-sidebar.is-collapsed {
  width: var(--sidebar-collapsed-width);
}

.module-sidebar.is-collapsed .sidebar-nav__label {
  opacity: 0;
  pointer-events: none;
}

.module-sidebar.is-icon-collapsed .sidebar-nav__group-toggle {
  display: none;
}

.module-sidebar.is-icon-collapsed .sidebar-nav__group-body {
  display: block;
}

.module-sidebar.is-collapsed .sidebar-nav__link {
  justify-content: center;
  padding: 0.55rem;
}

.module-sidebar.is-collapsed .sidebar-nav__link span {
  display: none;
}

.module-sidebar.is-collapsed .sidebar-collapse-btn {
  margin-left: auto;
  margin-right: auto;
  justify-content: center;
  padding: 0;
  width: 28px;
  transform: rotate(180deg);
}

.module-sidebar.is-collapsed .sidebar-collapse-btn span {
  display: none;
}

/* Tooltip on collapsed icons */
.module-sidebar.is-collapsed .sidebar-nav__link {
  position: relative;
}

.module-sidebar.is-collapsed .sidebar-nav__link::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--ynk-tooltip-bg);
  color: var(--ynk-tooltip-text);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.6rem;
  border-radius: var(--ynk-radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--ynk-duration-fast) var(--ynk-ease-default);
  z-index: var(--ynk-z-header);
}

.module-sidebar.is-collapsed .sidebar-nav__link:hover::after {
  opacity: 1;
}

/* ── Mobile Toggle Button ─────────────────────────── */

.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--ynk-text-subtle, #6b7280);
  border-radius: var(--ynk-radius-sm, 6px);
  transition: background 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}

.sidebar-toggle:hover {
  background: var(--ynk-surface-hover);
  color: var(--ynk-text, #111827);
}

/* ── Mobile Overlay ───────────────────────────────── */

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--ynk-overlay);
  z-index: var(--ynk-z-overlay);
  opacity: 0;
  transition: opacity var(--sidebar-transition);
}

.sidebar-overlay.is-visible {
  display: block;
  opacity: 1;
}

/* ── Responsive: Mobile ───────────────────────────── */

@media (max-width: 992px) {
  .sidebar-toggle {
    display: inline-flex;
  }

  .sidebar-collapse-btn {
    display: none;
  }

  .module-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    margin: 0;
    border-radius: 0;
    border: none;
    transform: translateX(-100%);
    z-index: var(--ynk-z-overlay);
    transition: transform var(--sidebar-transition);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
  }

  .module-sidebar.is-collapsed {
    width: var(--sidebar-width);
  }

  .module-sidebar.is-collapsed .sidebar-nav__label {
    opacity: 0.6;
  }

  .module-sidebar.is-icon-collapsed .sidebar-nav__group-toggle {
    display: flex;
  }

  .module-sidebar.is-icon-collapsed .sidebar-nav__group-body {
    display: block;
  }

  .module-sidebar.is-collapsed .sidebar-nav__link {
    justify-content: flex-start;
    padding: 0.55rem 0.8rem;
  }

  .module-sidebar.is-collapsed .sidebar-nav__link span {
    display: inline;
  }

  .module-sidebar.is-collapsed .sidebar-nav__link::after {
    display: none;
  }

  .module-sidebar.is-open {
    transform: translateX(0);
  }
}

/* ── Sidebar Badge (Notification Count) ──────────── */

.sidebar-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ynk-surface);
  background: var(--ynk-danger);
  border-radius: 9px;
  margin-left: auto;
  flex-shrink: 0;
}

.module-sidebar.is-collapsed .sidebar-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 8px;
  height: 8px;
  padding: 0;
  font-size: 0;
  margin-left: 0;
}

/* ── Print ────────────────────────────────────────── */

@media print {
  .module-sidebar,
  .sidebar-toggle,
  .sidebar-overlay {
    display: none !important;
  }

  .module-main-content {
    background: var(--ynk-surface);
  }
}