/* ===================================================================
   sidebar.css - Modern Side Menu Navigation
   =================================================================== */

:root {
  --sidebar-width: 280px;
  --sidebar-bg: linear-gradient(180deg, #003c8f 0%, #00897b 100%);
  --sidebar-text: #ffffff;
  --sidebar-hover-bg: rgba(255, 255, 255, 0.1);
  --sidebar-active-bg: rgba(255, 255, 255, 0.2);
  --sidebar-shadow: 0 0 30px rgba(0, 0, 0, 0.3);
  --toggle-btn-size: 50px;
  --transition-speed: 0.3s;
}

/* ===================================================================
   Sidebar Toggle Button (Floating default)
   =================================================================== */
.sidebar-toggle-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  width: var(--toggle-btn-size);
  height: var(--toggle-btn-size);
  background: linear-gradient(135deg, var(--brand-blue, #003c8f), var(--brand-teal, #009688));
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 24px;
  cursor: pointer;
  z-index: 1060;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0, 60, 143, 0.4);
  transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-toggle-btn .bi { display: inline-block; line-height: 1; }

.sidebar-toggle-btn:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: 0 6px 25px rgba(0, 60, 143, 0.6);
}

.sidebar-toggle-btn:active { transform: scale(0.95); }

/* Hide toggle button when sidebar is open */
body.sidebar-open .sidebar-toggle-btn {
  opacity: 0;
  pointer-events: none;
}

/* ===================================================================
   Sidebar Container
   =================================================================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  box-shadow: var(--sidebar-shadow);
  transform: translateX(-100%);
  transition: transform var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1070;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Custom scrollbar for sidebar */
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: rgba(255, 255, 255, 0.05); }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.3); border-radius: 3px; }
.sidebar::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.5); }

/* Sidebar open state */
body.sidebar-open .sidebar { transform: translateX(0); }

/* ===================================================================
   Sidebar Header
   =================================================================== */
.sidebar-header {
  padding: 1.5rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand {
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: transform 0.3s ease;
}

.sidebar-brand:hover { color: white; transform: translateX(5px); }

.sidebar-brand img {
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.sidebar-close-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.sidebar-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* ===================================================================
   Sidebar Content & Navigation
   =================================================================== */
.sidebar-content { padding: 1rem 0; }

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

.sidebar-nav .navbar-nav,
.sidebar-nav ul {
  flex-direction: column !important;
  width: 100%;
  padding: 0; margin: 0; list-style: none;
}

.sidebar-nav .nav-item { width: 100%; margin: 0; }

.sidebar-nav .nav-link {
  color: var(--sidebar-text) !important;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 3px solid transparent;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.sidebar-nav .nav-link::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  height: 100%; width: 0;
  background: rgba(255, 255, 255, 0.1);
  transition: width 0.3s ease;
}

.sidebar-nav .nav-link:hover {
  background: var(--sidebar-hover-bg);
  border-left-color: rgba(255, 255, 255, 0.8);
  transform: translateX(5px);
}

.sidebar-nav .nav-link:hover::before { width: 100%; }

.sidebar-nav .nav-link.active {
  background: var(--sidebar-active-bg);
  border-left-color: white;
  font-weight: 600;
}

.sidebar-nav .nav-link i {
  margin-right: 0.75rem;
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

/* Dropdowns */
.sidebar-nav .dropdown-toggle::after {
  margin-left: auto;
  transition: transform 0.3s ease;
  display: inline-block;
  content: '\203A'; /* Right arrow */
  border: none;
  vertical-align: middle;
  font-size: 1.2rem;
  font-weight: bold;
}

.sidebar-nav .dropdown.show .dropdown-toggle::after { transform: rotate(90deg); }

.sidebar-nav .dropdown-menu {
  position: static !important;
  float: none; width: 100%;
  background: rgba(0, 0, 0, 0.2) !important;
  border: none; border-radius: 0;
  margin: 0 !important; padding: 0;
  box-shadow: none;
  transform: none !important;
  display: none !important; /* Hidden by default */
  visibility: visible !important;
  opacity: 1 !important;
}

.sidebar-nav .dropdown.show > .dropdown-menu { display: block !important; }

.sidebar-nav .dropdown-menu .dropdown-item {
  color: var(--sidebar-text) !important;
  padding: 0.75rem 1.5rem 0.75rem 3rem;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
  background: transparent !important;
  text-decoration: none;
}

.sidebar-nav .dropdown-menu .dropdown-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-left-color: rgba(255, 255, 255, 0.5);
  transform: translateX(5px);
}

.sidebar-nav .dropdown-menu .dropdown-item::after { display: none; }

/* Nested dropdowns */
.sidebar-nav .dropdown-submenu { position: relative; }

.sidebar-nav .dropdown-submenu > .dropdown-menu {
  background: rgba(0, 0, 0, 0.3) !important;
  display: none !important; /* Hidden by default */
}

.sidebar-nav .dropdown-submenu.show > .dropdown-menu { display: block !important; }

.sidebar-nav .dropdown-submenu .dropdown-item { padding-left: 4rem; }

.sidebar-nav .dropdown-submenu > .dropdown-item {
  display: flex; justify-content: space-between; align-items: center;
}

.sidebar-nav .dropdown-submenu .submenu-caret {
  margin-left: auto; opacity: 0.7; transition: transform 0.3s ease;
}

.sidebar-nav .dropdown-submenu.show > .dropdown-item .submenu-caret { transform: rotate(90deg); }

/* ===================================================================
   Sidebar Overlay (for mobile)
   =================================================================== */
.sidebar-overlay {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  opacity: 0; visibility: hidden;
  transition: all var(--transition-speed) ease;
  z-index: 1065;
}

body.sidebar-open .sidebar-overlay { opacity: 1; visibility: visible; }

/* ===================================================================
   Page Content Adjustment (lg+)
   =================================================================== */
@media (min-width: 992px) {
  body.sidebar-open .navbar,
  body.sidebar-open .container,
  body.sidebar-open .alert {
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-speed) ease;
  }
}

/* ===================================================================
   Responsive
   =================================================================== */
@media (max-width: 991px) {
  :root { --sidebar-width: 260px; }
  .sidebar-toggle-btn { top: 15px; left: 15px; }
}

@media (max-width: 576px) {
  :root { --sidebar-width: 85vw; }
  .sidebar-toggle-btn { width: 45px; height: 45px; font-size: 20px; top: 10px; left: 10px; }
  .sidebar-header { padding: 1rem 0.75rem; }
  .sidebar-nav .nav-link { padding: 0.75rem 1rem; font-size: 0.95rem; }
}

/* ===================================================================
   Accessibility & Motion
   =================================================================== */
.sidebar-toggle-btn:focus,
.sidebar-close-btn:focus,
.sidebar-nav .nav-link:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .sidebar-toggle-btn,
  .sidebar-overlay,
  .sidebar-nav .nav-link { transition: none; }
}

/* ===================================================================
   Navbar-integrated toggle (aligns with brand)
   =================================================================== */
.navbar .sidebar-toggle-btn {
  position: static;
  top: auto; left: auto;
  width: auto; height: auto;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  color: inherit;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem; /* ~ .fs-3 */
  line-height: 1;
  transition: none;
}

.navbar .sidebar-toggle-btn:hover,
.navbar .sidebar-toggle-btn:active {
  transform: none; box-shadow: none;
}

/* NOTE: Removed the old rule that forced .navbar-brand { margin-left: 70px !important; } */