/* ============================================
   RITHM - Sidebar Navigation
   ============================================ */

/* --- Sidebar Container --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--sidebar-width);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal);
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

/* --- Collapsed State --- */
.sidebar.collapsed,
[data-sidebar-collapsed] .sidebar {
  width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-item-text,
.sidebar.collapsed .sidebar-logo-text,
.sidebar.collapsed .sidebar-section-label,
.sidebar.collapsed .sidebar-user-info,
.sidebar.collapsed .sidebar-user-actions,
.sidebar.collapsed .sidebar-auth-actions .sidebar-item-text,
.sidebar.collapsed .sidebar-signup-btn .sidebar-item-text,
[data-sidebar-collapsed] .sidebar .sidebar-item-text,
[data-sidebar-collapsed] .sidebar .sidebar-logo-text,
[data-sidebar-collapsed] .sidebar .sidebar-section-label {
  display: none;
}

.sidebar.collapsed .sidebar-collapse-btn i,
[data-sidebar-collapsed] .sidebar .sidebar-collapse-btn i {
  transform: rotate(180deg);
}

.sidebar.collapsed .sidebar-nav,
[data-sidebar-collapsed] .sidebar .sidebar-nav {
  padding: 0 4px;
}

.sidebar.collapsed .sidebar-nav .sidebar-item,
[data-sidebar-collapsed] .sidebar .sidebar-nav .sidebar-item {
  justify-content: center;
}

.sidebar.collapsed .sidebar-logo,
[data-sidebar-collapsed] .sidebar .sidebar-logo {
  justify-content: center;
}

/* --- Sidebar Items --- */
.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  text-decoration: none;
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
}

.sidebar-item:hover {
  background: var(--surface-alpha);
  color: var(--text-primary);
}

.sidebar-item.active {
  background: var(--surface-primary);
  color: var(--color-primary);
}

.sidebar-item-icon {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  font-size: 14px;
}

.sidebar-item--small {
  padding: 5px 10px;
  font-size: 12px;
}

.sidebar-item--danger:hover {
  color: var(--color-danger);
}

/* --- Section Labels --- */
.sidebar-section-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px 10px 4px;
  font-weight: 500;
  font-family: var(--font-sans);
}

/* --- Logo --- */
.sidebar-logo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 12px;
  margin-bottom: 4px;
}

.sidebar-logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar-logo-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.sidebar-collapse-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-collapse-btn:hover {
  color: var(--text-primary);
  background: var(--surface-alpha);
}

.sidebar-collapse-btn i {
  transition: transform var(--transition-fast);
}

/* --- Navigation --- */
.sidebar-nav {
  flex: 1;
  padding: 0 8px;
  overflow-y: auto;
}

/* --- Bottom Section --- */
.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 12px 8px 8px;
}

/* --- User Card --- */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  background: var(--surface-alpha);
  margin: 8px 0;
}

.sidebar-user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.sidebar-user-avatar--default {
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

.sidebar-user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-user-name {
  font-size: 12px;
  color: var(--text-primary);
  font-weight: 500;
}

.sidebar-user-streak {
  font-size: 10px;
  color: var(--color-warning);
}

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

/* --- Notification Badge --- */
.sidebar-badge {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-left: auto;
  flex-shrink: 0;
}

/* --- Numbered Badge (chat unread count) --- */
.sidebar-unread-count {
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  margin-left: auto;
  flex-shrink: 0;
}

.sidebar.collapsed .sidebar-unread-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 14px;
  height: 14px;
  padding: 0 3px;
  font-size: 9px;
  line-height: 14px;
}

.sidebar.collapsed .sidebar-item {
  position: relative;
}

/* --- Signup Button --- */
.sidebar-signup-btn {
  text-align: center;
  padding: 8px;
  margin-top: 4px;
  width: 100%;
}

/* --- Logout Form --- */
.sidebar-logout-form {
  display: contents;
}

/* --- Auth Actions --- */
.sidebar-auth-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* --- App Layout --- */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-right: var(--right-panel-width);
  min-width: 0;
  background: var(--bg-base);
  transition: margin-left var(--transition-normal), margin-right var(--transition-normal);
}

.app-layout.sidebar-collapsed .app-main,
[data-sidebar-collapsed] .app-main {
  margin-left: var(--sidebar-collapsed-width);
}

.app-layout.rp-collapsed .app-main,
[data-rp-collapsed] .app-main {
  margin-right: var(--right-panel-collapsed-width);
}

/* --- Mobile Styles --- */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-modal);
  }

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

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

  .app-main {
    margin-left: 0;
    margin-right: 0;
    padding-top: 60px; /* Clear the fixed hamburger button */
  }

  .app-layout.sidebar-collapsed .app-main {
    margin-left: 0;
  }

  .app-layout.rp-collapsed .app-main {
    margin-right: 0;
  }
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  display: none;
}

.sidebar.open ~ .sidebar-overlay {
  display: block;
}

.sidebar-mobile-toggle {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 90;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
}

/* --- Focus States --- */
.sidebar-item:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: none;
}

.sidebar-collapse-btn:focus-visible,
.sidebar-mobile-toggle:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: none;
}

/* --- Desktop Styles --- */
@media (min-width: 1024px) {
  .sidebar-mobile-toggle {
    display: none;
  }

  .sidebar-overlay {
    display: none !important;
  }
}

/* ── Upgrade / Go Pro sidebar item ──────────────────────── */
.sidebar-item--upgrade {
  color: var(--color-primary-light);
  margin-top: var(--space-2);
}

.sidebar-item--upgrade .sidebar-item-icon {
  color: var(--color-primary-light);
}

.sidebar-item--upgrade:hover {
  background: var(--surface-primary);
  color: var(--color-primary-light);
}