/* ==========================================================================
   sidebar.css — Right sidebar styling for hamz.me theme
   The sidebar is the signature element: permanent dark panel on the right,
   housing logo, nav, social links, contextual TOC, and theme toggle.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Sidebar Container
   -------------------------------------------------------------------------- */
.site-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: var(--space-xl) var(--space-lg);
  overflow-y: auto;
  z-index: 100;
  transition: transform var(--transition-slow);
}

/* Custom scrollbar for sidebar */
.site-sidebar::-webkit-scrollbar {
  width: 4px;
}

.site-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.site-sidebar::-webkit-scrollbar-thumb {
  background: var(--sidebar-border);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Logo & Branding
   -------------------------------------------------------------------------- */
.sidebar-logo {
  display: block;
  margin-bottom: var(--space-sm);
  text-align: center;
}

.sidebar-logo img {
  width: 50px;
  height: auto;
  margin: 0 auto;
}

.sidebar-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--sidebar-text);
  text-decoration: none;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
  text-align: center;
  display: block;
}

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

.sidebar-tagline {
  font-size: var(--fs-xs);
  color: var(--sidebar-text-muted);
  line-height: 1.4;
  margin-bottom: var(--space-xl);
  text-align: center;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.sidebar-nav {
  margin-bottom: var(--space-lg);
}

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

.sidebar-nav li {
  margin-bottom: var(--space-xs);
}

.sidebar-nav a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sidebar);
  font-size: var(--fs-sidebar-nav);
  font-weight: var(--fw-medium);
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: 6px;
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.sidebar-nav a:hover,
.sidebar-nav a:focus-visible {
  color: var(--sidebar-hover-text);
  background-color: var(--sidebar-accent-subtle);
}

/* Active nav item — green left border */
.sidebar-nav .current-menu-item a,
.sidebar-nav a[aria-current="page"] {
  color: var(--sidebar-accent);
  background-color: var(--sidebar-accent-subtle);
  border-left: 3px solid var(--sidebar-accent);
  padding-left: calc(var(--space-md) - 3px);
}

/* --------------------------------------------------------------------------
   Search
   -------------------------------------------------------------------------- */
.sidebar-search {
  margin-bottom: var(--space-lg);
  padding: 0 var(--space-md);
}

.sidebar-search-form {
  margin: 0;
}

.sidebar-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.sidebar-search-icon {
  position: absolute;
  left: 10px;
  color: var(--sidebar-text-muted);
  pointer-events: none;
  width: 14px;
  height: 14px;
}

.sidebar-search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 32px;
  font-size: var(--fs-xs);
  font-family: var(--font-sidebar);
  color: var(--sidebar-text);
  background: var(--sidebar-border);
  border: 1px solid transparent;
  border-radius: 6px;
  outline: none;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.sidebar-search-input::placeholder {
  color: var(--sidebar-text-muted);
}

.sidebar-search-input:focus {
  border-color: var(--sidebar-accent);
  background: rgba(255, 255, 255, 0.05);
}

/* --------------------------------------------------------------------------
   Social Links
   -------------------------------------------------------------------------- */
.sidebar-social {
  display: flex;
  gap: var(--space-md);
  padding: 0 var(--space-md);
  margin-bottom: var(--space-xl);
}

.sidebar-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--sidebar-text-muted);
  text-decoration: none;
  border-radius: 6px;
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.sidebar-social a:hover,
.sidebar-social a:focus-visible {
  color: var(--sidebar-hover-text);
  background-color: var(--sidebar-accent-subtle);
}

.sidebar-social svg {
  width: 20px;
  height: 20px;
}

/* --------------------------------------------------------------------------
   Contextual Table of Contents (populated by JS on single posts)
   -------------------------------------------------------------------------- */
.sidebar-toc {
  flex: 1;
  padding: 0 var(--space-md);
  margin-bottom: var(--space-lg);
  display: none; /* Hidden by default, shown by JS when headings exist */
}

.sidebar-toc.is-visible {
  display: block;
}

.sidebar-toc-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--sidebar-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--ls-uppercase);
  margin-bottom: var(--space-sm);
}

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

.sidebar-toc li {
  margin-bottom: 2px;
}

.sidebar-toc a {
  display: block;
  padding: 3px 0;
  font-size: var(--fs-toc);
  color: var(--sidebar-text-muted);
  text-decoration: none;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.sidebar-toc a:hover {
  color: var(--sidebar-text);
}

/* Active TOC item (scroll spy) */
.sidebar-toc a.is-active {
  color: var(--sidebar-accent);
}

/* Indent h3 items */
.sidebar-toc .toc-h3 {
  padding-left: var(--space-md);
}

/* --------------------------------------------------------------------------
   Spacer — pushes bottom elements down
   -------------------------------------------------------------------------- */
.sidebar-spacer {
  flex: 1;
}

/* --------------------------------------------------------------------------
   Theme Toggle
   -------------------------------------------------------------------------- */
.sidebar-toggle {
  padding: 0 var(--space-md);
  margin-bottom: var(--space-md);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--fs-small);
  color: var(--sidebar-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
}

/* Hide the icon that doesn't match current theme */
.theme-toggle-btn .icon-sun { display: none; }
.theme-toggle-btn .icon-moon { display: inline; }

[data-theme="dark"] .theme-toggle-btn .icon-sun { display: inline; }
[data-theme="dark"] .theme-toggle-btn .icon-moon { display: none; }

/* --------------------------------------------------------------------------
   Copyright
   -------------------------------------------------------------------------- */
.sidebar-copyright {
  padding: 0 var(--space-md);
  font-size: var(--fs-xs);
  color: var(--sidebar-text-muted);
}

/* --------------------------------------------------------------------------
   Mobile Overlay Backdrop
   -------------------------------------------------------------------------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

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