/* ============================================================
   MATH QUIZ APP - SIDEBAR COMPONENT STYLES
   ============================================================ */

/* ------------------------------------------------------------
   1. APP LAYOUT
   ------------------------------------------------------------ */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ------------------------------------------------------------
   2. SIDEBAR BASE
   ------------------------------------------------------------ */
.app-sidebar {
  width: 260px;
  color: #fff;
  transition: width 0.3s ease;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.app-sidebar.collapsed {
  width: 64px;
}

/* ------------------------------------------------------------
   3. USER SIDEBAR COLORS
   ------------------------------------------------------------ */
.user-sidebar {
  background: #0b5ed7;
}

.user-sidebar .sidebar-link {
  color: rgba(255, 255, 255, 0.85);
}

.user-sidebar .sidebar-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.user-sidebar .sidebar-link.active {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border-right: 3px solid #fff;
}

.sidebar-user-sub {
  display: block;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 2px;
  font-weight: 400;
}

.app-sidebar.collapsed .sidebar-user-sub {
  display: none;
}

/* ------------------------------------------------------------
   4. ADMIN SIDEBAR COLORS
   ------------------------------------------------------------ */
.admin-sidebar {
  background: #1a1a2e;
}

.admin-sidebar .sidebar-link {
  color: rgba(255, 255, 255, 0.7);
}

.admin-sidebar .sidebar-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.admin-sidebar .sidebar-link.active {
  background: rgba(255, 193, 7, 0.15);
  color: #ffc107;
  border-right: 3px solid #ffc107;
}

/* ------------------------------------------------------------
   5. SIDEBAR HEADER
   ------------------------------------------------------------ */
.sidebar-header {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 60px;
}

.sidebar-brand {
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
  overflow: hidden;
}

.app-sidebar.collapsed .sidebar-brand {
  display: none;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.25rem;
  flex-shrink: 0;
  transition: color 0.2s;
}

.sidebar-toggle:hover {
  color: #fff;
}

/* ------------------------------------------------------------
   6. SIDEBAR NAVIGATION
   ------------------------------------------------------------ */
.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
  overflow: hidden;
  font-size: 0.9rem;
}

.sidebar-link i {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.app-sidebar.collapsed .sidebar-link span {
  display: none;
}

/* ------------------------------------------------------------
   7. SIDEBAR FOOTER
   ------------------------------------------------------------ */
.sidebar-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-user-info {
  display: block;
  padding: 0.5rem 0;
}

.app-sidebar.collapsed .sidebar-user-info {
  display: none;
}

.sidebar-user-info strong {
  font-size: 0.9rem;
}

/* ------------------------------------------------------------
   8. MAIN CONTENT AREA
   ------------------------------------------------------------ */
.app-main {
  flex: 1;
  margin-left: 260px;
  transition: margin-left 0.3s ease;
  min-width: 0;
  background: #f5f6fa;
}

.app-main.expanded {
  margin-left: 64px;
}


/* ------------------------------------------------------------
   9. SIDEBAR COPYRIGHT
   ------------------------------------------------------------ */
.sidebar-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 0.75rem;
}

.sidebar-copyright {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem 0.75rem;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.sidebar-copyright:hover {
  opacity: 0.8;
}

.sidebar-copyright .copyright-text {
  color: rgba(255, 255, 255, 0.7);
  font-weight: 400;
}

.sidebar-copyright .copyright-text strong {
  font-weight: 600;
  color: #fff;
}

.sidebar-copyright .copyright-dot {
  color: rgba(255, 255, 255, 0.3);
  font-weight: 700;
}



/* ------------------------------------------------------------
   10. RESPONSIVE
   ------------------------------------------------------------ */
@media (max-width: 992px) {
  .app-sidebar {
    width: 64px;
  }
  
  .app-sidebar .sidebar-brand,
  .app-sidebar .sidebar-link span,
  .app-sidebar .sidebar-user-info {
    display: none;
  }
  
  .app-main {
    margin-left: 64px;
  }
}

@media (max-width: 768px) {
  .app-sidebar {
    width: 0;
    overflow: hidden;
  }
  
  .app-sidebar.mobile-open {
    width: 260px;
  }
  
  .app-sidebar.mobile-open .sidebar-brand,
  .app-sidebar.mobile-open .sidebar-link span,
  .app-sidebar.mobile-open .sidebar-user-info {
    display: block;
  }
  
  .app-sidebar.mobile-open .sidebar-link span {
    display: inline;
  }
  
  .app-main {
    margin-left: 0;
  }
}