/* Modern Sidebar Navigation Styles */

.sidebar-modern {
  background: #181a1b;
  min-height: 100vh;
  height: 100%;
  padding: 1.5rem 0.5rem 1rem 0.5rem;
  box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  width: 260px;
  transition: width 0.2s;
  position: relative;
  z-index: 100;
  border-right: none;
  overflow-y: visible;
}

.logo-img {
  max-width: 140px;
  max-height: 38px;
  vertical-align: middle;
  margin-bottom: 0.2rem;
  display: inline-block;
  padding-left: 18px;
}
.logo-dark { display: none; }
.logo-light { display: inline-block; }
body.dark-mode .logo-dark { display: inline-block; }
body.dark-mode .logo-light { display: none; }

body:not(.dark-mode) .sidebar-modern {
  background: #f8f9fa;
}
.app-flex-row {
  display: flex;
}
.main-content-area {
  margin-left: 260px;
}
@media (max-width: 900px) {
  .sidebar-modern {
    position: fixed;
    left: 0; top: 0;
    height: 100vh;
    z-index: 2000;
    transform: translateX(-100%);
    transition: transform 0.2s;
    overflow-y: auto;
  }
  .sidebar-modern.open {
    transform: translateX(0);
  }
  .main-content-area {
    margin-left: 0;
    padding: 1.25rem 0.5rem;
  }
}
body:not(.dark-mode) .sidebar-modern {
  background: #f8f9fa;
}
.app-flex-row {
  display: block;
}
.main-content-area {
  margin-left: 260px;
}
@media (max-width: 900px) {
  .sidebar-modern {
    position: fixed;
    left: 0; top: 0;
    height: 100vh;
    z-index: 2000;
    transform: translateX(-100%);
    transition: transform 0.2s;
  }
  .sidebar-modern.open {
    transform: translateX(0);
  }
  .main-content-area {
    margin-left: 0;
    padding: 1.25rem 0.5rem;
  }
}
body:not(.dark-mode) .sidebar-modern {
  background: #f8f9fa;
}

.sidebar-modern.collapsed {
  width: 64px;
}
.sidebar-modern .sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}
.sidebar-modern .sidebar-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}
.sidebar-modern .sidebar-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}
.sidebar-modern .user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #1564d6;
  margin-right: 0.75rem;
}
.sidebar-modern .user-section {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}
.sidebar-modern .user-name {
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
}
.sidebar-modern .nav-section {
  margin-bottom: 1.5rem;
}
.sidebar-modern .nav-section-title {
  color: #aaa;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  margin: 1.5rem 0 0.5rem 0.75rem;
  letter-spacing: 0.5px;
}
body:not(.dark-mode) .sidebar-modern .nav-section-title {
  color: #444;
}
.sidebar-modern .nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-modern .nav-list-item {
  margin-bottom: 0.3rem;
}
.sidebar-modern .nav-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.7rem 1rem;
  color: #f1f1f1;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
body:not(.dark-mode) .sidebar-modern .nav-link {
  color: #2b2b2b;
}
body:not(.dark-mode) .sidebar-modern .nav-link.active {
  background: #1564d6;
  color: #fff;
}
body:not(.dark-mode) .sidebar-modern .nav-link:hover {
  background: #e8e8e8;
  color: #1564d6;
}
body:not(.dark-mode) .sidebar-modern .nav-link[aria-disabled="true"],
body:not(.dark-mode) .sidebar-modern .nav-link.disabled {
  color: #aaa;
  opacity: 1;
}
.sidebar-modern .nav-link.active {
  background: #1564d6;
  color: #fff;
  box-shadow: 0 2px 8px rgba(21,100,214,0.12);
}
.sidebar-modern .nav-link:hover {
  background: #23272b;
  color: #fff;
}
.sidebar-modern .nav-link .sidebar-icon {
  font-size: 1.2rem;
  display: inline-block;
}
.sidebar-modern .logout-section {
  margin-top: 2rem;
  border-top: 1px solid #23272b;
  padding-top: 1.5rem;
}

.mobile-menu-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: #1564d6;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.25rem;
  z-index: 2100;
  cursor: pointer;
}

@media (min-width: 900px) {
  .mobile-menu-btn { display: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar-modern {
    width: 100vw;
    min-height: auto;
    position: fixed;
    z-index: 2000;
    left: 0; top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.2s;
    transform: translateX(-100%);
  }
  .sidebar-modern.open {
    transform: translateX(0);
  }
}