/**
 * Sidebar Navigation Component
 * Persistent left sidebar for desktop, slide-in drawer for mobile.
 * Replaces horizontal tab bar — supports grouped sections and sub-items.
 */

/* ═══════════════════════════════════════════════════════════
   CSS VARIABLES (sidebar-specific)
   ══════════════════════════════════════════════════════════ */
:root {
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 64px;
  --sidebar-bg: rgba(13, 13, 26, 0.97);
  --sidebar-border: var(--border-subtle);
  --sidebar-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-z: 95;
}


/* ═══════════════════════════════════════════════════════════
   APP LAYOUT (sidebar + main content)
   ══════════════════════════════════════════════════════════ */
.app-layout {
  display: flex;
  min-height: calc(100vh - 60px); /* below header */
}

.app-main {
  flex: 1;
  min-width: 0; /* prevent flex overflow */
  transition: margin-left var(--sidebar-transition);
}

/* When sidebar is open on desktop */
@media (min-width: 769px) {
  .app-main {
    margin-left: var(--sidebar-width);
  }
  .app-layout.sidebar-collapsed .app-main {
    margin-left: var(--sidebar-collapsed-width);
  }
}


/* ═══════════════════════════════════════════════════════════
   SIDEBAR — DESKTOP
   ══════════════════════════════════════════════════════════ */
.sidebar {
  position: fixed;
  top: 60px; /* below header */
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: var(--sidebar-z);
  transition: width var(--sidebar-transition), transform var(--sidebar-transition);
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--sidebar-border) transparent;
  backdrop-filter: blur(20px);
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--sidebar-border);
  border-radius: 4px;
}

/* Collapsed state (icon only) */
.app-layout.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed-width);
}
.app-layout.sidebar-collapsed .sidebar .nav-label,
.app-layout.sidebar-collapsed .sidebar .nav-group-title,
.app-layout.sidebar-collapsed .sidebar .nav-sub-items,
.app-layout.sidebar-collapsed .sidebar .sidebar-footer-text {
  display: none;
}
.app-layout.sidebar-collapsed .sidebar .nav-item {
  justify-content: center;
  padding-left: 0;
  padding-right: 0;
}
.app-layout.sidebar-collapsed .sidebar .nav-icon {
  margin: 0;
  font-size: 1.3rem;
}

/* Runtime mobile override for large-screen phones/foldables.
   JS sets html.force-mobile-layout when the device is phone-like even if the
   reported viewport width is wider than the raw CSS mobile breakpoint. */
html.force-mobile-layout .app-main {
  margin-left: 0 !important;
}

html.force-mobile-layout .sidebar,
html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
  width: 280px;
  top: var(--mobile-header-height, 56px);
  z-index: 300;
  box-shadow: none;
}

html.force-mobile-layout .sidebar.open {
  transform: translateX(0);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.6);
}

html.force-mobile-layout .sidebar-toggle {
  display: none;
}

html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .nav-label,
html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .nav-group-title,
html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .nav-sub-items,
html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .sidebar-footer-text {
  display: revert;
}

html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .nav-item {
  justify-content: flex-start;
  padding-left: 16px;
  padding-right: 16px;
}

html.force-mobile-layout .app-layout.sidebar-collapsed .sidebar .nav-icon {
  margin-right: 12px;
  font-size: 1rem;
}

html.force-mobile-layout .sidebar-backdrop {
  display: none;
  position: fixed;
  top: var(--mobile-header-height, 56px);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 299;
  backdrop-filter: blur(2px);
  cursor: pointer;
}

html.force-mobile-layout .sidebar-backdrop.visible {
  display: block;
}

html.force-mobile-layout .sidebar-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--sidebar-border);
}

html.force-mobile-layout .hamburger-btn {
  display: flex;
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════════
   COLLAPSE TOGGLE BUTTON
   ══════════════════════════════════════════════════════════ */
.sidebar-toggle {
  position: absolute;
  top: 12px;
  right: -14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg2, #111118);
  border: 1px solid var(--sidebar-border);
  color: var(--text-dim, #b0acc8);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  z-index: 100;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.sidebar-toggle:hover {
  color: var(--gold, #c9a84c);
  border-color: var(--gold, #c9a84c);
  background: var(--bg3, #1a1a24);
}
.app-layout.sidebar-collapsed .sidebar-toggle {
  right: -14px;
  transform: rotate(180deg);
}


/* ═══════════════════════════════════════════════════════════
   NAVIGATION GROUPS
   ══════════════════════════════════════════════════════════ */
.sidebar-nav {
  flex: 1;
  padding: 8px 0;
}

.nav-group {
  margin-bottom: 4px;
}

.nav-group-guided-hidden {
  display: none !important;
}

.nav-group-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted, #7a76a0);
  padding: 16px 16px 6px;
  user-select: none;
}


/* ═══════════════════════════════════════════════════════════
   NAVIGATION ITEMS
   ══════════════════════════════════════════════════════════ */
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  margin: 1px 8px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-dim, #b0acc8);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.15s;
  text-decoration: none;
  border: none;
  background: none;
  width: calc(100% - 16px);
  text-align: left;
  position: relative;
  white-space: nowrap;
}

.nav-item-guided-hidden {
  display: none !important;
}

.nav-item:hover {
  background: rgba(201, 168, 76, 0.08);
  color: var(--text, #eceaf4);
}

.nav-item.active {
  background: rgba(201, 168, 76, 0.14);
  color: var(--gold, #c9a84c);
  font-weight: 600;
}

/* Active indicator bar */
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--gold, #c9a84c);
}

.nav-icon {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

.nav-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Badge (e.g., notification count or "PRO" tag) */
.nav-badge {
  font-size: 0.6rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 9999px;
  background: rgba(201, 168, 76, 0.2);
  color: var(--gold, #c9a84c);
  letter-spacing: 0.03em;
}
.nav-badge.pro {
  background: rgba(122, 95, 216, 0.2);
  color: #b09aed;
}


/* ═══════════════════════════════════════════════════════════
   SUB-ITEMS (expandable beneath a parent)
   ══════════════════════════════════════════════════════════ */
.nav-sub-items {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.25s ease-out;
}

.nav-parent.expanded + .nav-sub-items,
.nav-parent.active + .nav-sub-items {
  max-height: 200px;
}

.nav-sub-items .nav-item {
  padding-left: 48px;
  font-size: 0.8rem;
  color: var(--text-muted, #7a76a0);
}
.nav-sub-items .nav-item:hover {
  color: var(--text-dim, #b0acc8);
}
.nav-sub-items .nav-item.active {
  color: var(--gold, #c9a84c);
  background: rgba(201, 168, 76, 0.08);
}
.nav-sub-items .nav-item.active::before {
  display: none;
}

.nav-divider-guided-hidden {
  display: none !important;
}

/* Expand/collapse arrow on parent items with children */
.nav-parent .nav-expand {
  font-size: 0.6rem;
  color: var(--text-muted, #7a76a0);
  transition: transform 0.2s;
  margin-left: auto;
}
.nav-parent.expanded .nav-expand {
  transform: rotate(90deg);
}


/* ═══════════════════════════════════════════════════════════
   SIDEBAR DIVIDER
   ══════════════════════════════════════════════════════════ */
.nav-divider {
  height: 1px;
  background: var(--sidebar-border);
  margin: 8px 16px;
  opacity: 0.5;
}


/* ═══════════════════════════════════════════════════════════
   SIDEBAR FOOTER (user info / settings)
   ══════════════════════════════════════════════════════════ */
.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-footer .nav-item {
  margin: 1px 0;
  width: 100%;
  font-size: 0.8rem;
}


/* ═══════════════════════════════════════════════════════════
   MOBILE: SIDEBAR BECOMES SLIDE-IN DRAWER
   ══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    top: var(--mobile-header-height, 56px); /* start below sticky header */
    z-index: 300;
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.6);
  }

  .sidebar-toggle {
    display: none; /* collapse toggle not needed on mobile */
  }

  .app-main {
    margin-left: 0 !important;
  }

  /* Backdrop when drawer is open — starts below sticky header */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: var(--mobile-header-height, 56px);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 299;
    backdrop-filter: blur(2px);
    cursor: pointer; /* required for iOS Safari tap events on non-interactive elements */
  }
  .sidebar-backdrop.visible {
    display: block;
  }

  /* Mobile drawer header with close button */
  .sidebar-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--sidebar-border);
  }
  .sidebar-drawer-header .drawer-logo {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gold, #c9a84c);
    letter-spacing: 0.04em;
  }
  .sidebar-close-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: none;
    border: 1px solid var(--sidebar-border);
    color: var(--text-dim, #b0acc8);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
  }
  .sidebar-close-btn:hover {
    color: var(--gold, #c9a84c);
    border-color: var(--gold, #c9a84c);
  }
}

/* Desktop: hide mobile-only drawer elements */
@media (min-width: 769px) {
  .sidebar-drawer-header {
    display: none;
  }
  .sidebar-backdrop {
    display: none !important;
  }
}


/* ═══════════════════════════════════════════════════════════
   HAMBURGER BUTTON (header, mobile only)
   ══════════════════════════════════════════════════════════ */
.hamburger-btn {
  display: none; /* hidden on desktop */
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: none;
  border: 1px solid var(--sidebar-border);
  color: var(--text-dim, #b0acc8);
  cursor: pointer;
  font-size: 1.3rem;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}
.hamburger-btn:hover {
  color: var(--gold, #c9a84c);
  border-color: var(--gold, #c9a84c);
}

@media (max-width: 768px) {
  .hamburger-btn {
    display: flex;
    flex-shrink: 0;
    /* part of flex flow — no position:absolute so it doesn't overlap the logo */
  }
}