/* ── Sidebar shell ── */

.sidebar {
  width: var(--sb-width);
  flex-shrink: 0;
  background: var(--sb-bg);
  border-right: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  transition: width 0.2s ease;
}

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

/* ── Header ── */

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 12px;
  border-bottom: 1px solid var(--sb-border);
  min-height: 52px;
  flex-shrink: 0;
}

.sidebar-logo {
  font-size: var(--text-heading-xs);
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--sb-accent);
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.15s ease, width 0.2s ease;
}

.sidebar.collapsed .sidebar-logo {
  opacity: 0;
  width: 0;
}

/* ── Toggle button ── */

.sidebar-toggle {
  background: none;
  border: 1px solid var(--sb-border);
  border-radius: 5px;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: border-color 0.12s;
}

.sidebar-toggle:hover {
  border-color: var(--sb-text-muted);
}

.sidebar-toggle-icon {
  display: block;
  width: 10px;
  height: 8px;
  position: relative;
}

.sidebar-toggle-icon::before,
.sidebar-toggle-icon::after,
.sidebar-toggle-icon {
  transition: all 0.2s ease;
}

/* Three-line hamburger */
.sidebar-toggle-icon,
.sidebar-toggle-icon::before,
.sidebar-toggle-icon::after {
  background: var(--sb-text-muted);
  height: 1.5px;
  border-radius: 1px;
}

.sidebar-toggle-icon::before,
.sidebar-toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
}

.sidebar-toggle-icon::before { top: -3.5px; }
.sidebar-toggle-icon::after  { top: 3.5px; }

/* Collapsed: show only middle line (becomes arrow-like via border trick) */
.sidebar.collapsed .sidebar-toggle-icon {
  background: transparent;
}

.sidebar.collapsed .sidebar-toggle-icon::before {
  top: -2px;
  transform: rotate(35deg);
  transform-origin: left center;
  width: 70%;
}

.sidebar.collapsed .sidebar-toggle-icon::after {
  top: 2px;
  transform: rotate(-35deg);
  transform-origin: left center;
  width: 70%;
}

/* ── Nav ── */

.sidebar-nav {
  flex: 1;
  padding: 10px 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 8px;
  border-radius: 6px;
  font-size: var(--text-label-sm);
  font-weight: 500;
  color: var(--sb-text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s;
}

.sidebar-link:hover {
  background: var(--sb-hover-bg);
  color: var(--sb-active-color);
}

.sidebar-link.active {
  background: var(--sb-hover-bg);
  color: var(--sb-active-color);
}

.sidebar-icon {
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  font-size: var(--text-paragraph-sm);
  line-height: 1;
}

.sidebar-label {
  overflow: hidden;
  transition: opacity 0.15s ease, max-width 0.2s ease;
  max-width: 200px;
}

.sidebar.collapsed .sidebar-label {
  opacity: 0;
  max-width: 0;
}

/* ── Submenu ── */

.sidebar-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-submenu {
  padding-left: 10px;
  border-left: 1px solid var(--sb-border);
  margin-left: 15px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
  transition: opacity 0.15s ease, max-height 0.2s ease;
  max-height: 200px;
}

.sidebar.collapsed .sidebar-submenu {
  opacity: 0;
  max-height: 0;
  pointer-events: none;
}

.sidebar-sublink {
  font-size: var(--text-paragraph-xs);
  font-weight: 400;
  padding: 5px 8px;
}

/* ── Footer ── */

.sidebar-footer {
  padding: 10px 6px 14px;
  border-top: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-user {
  padding: 0 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: opacity 0.15s ease, max-height 0.2s ease;
  max-height: 60px;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-user {
  opacity: 0;
  max-height: 0;
}

.sidebar-user-name {
  font-size: var(--text-label-sm);
  font-weight: 500;
  color: var(--sb-text);
  white-space: nowrap;
}

.sidebar-user-email {
  font-size: var(--text-paragraph-xs);
  font-variant-numeric: tabular-nums;
  color: var(--sb-text-muted);
  white-space: nowrap;
}

.sidebar-theme-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 7px 8px;
  background: transparent;
  border: 1px solid var(--sb-border);
  border-radius: 6px;
  font-size: var(--text-label-xs);
  font-weight: 500;
  color: var(--sb-text-muted);
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  transition: border-color 0.12s, color 0.12s;
}

.sidebar-theme-toggle:hover {
  border-color: var(--sb-text-muted);
  color: var(--sb-text);
}

.sidebar-signout {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 7px 8px;
  background: transparent;
  border: 1px solid var(--sb-border);
  border-radius: 6px;
  font-size: var(--text-label-xs);
  font-weight: 500;
  color: var(--sb-text-muted);
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  transition: border-color 0.12s, color 0.12s;
}

.sidebar-signout:hover {
  border-color: var(--sb-text-muted);
  color: var(--sb-text);
}