.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 1000;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-right: var(--glass-border);
    box-shadow: 5px 0 25px rgba(80, 70, 160, 0.08);
}

body.dark-mode .sidebar {
    background: rgba(15, 10, 46, 0.65);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar.collapsed {
    width: 70px;
}

.sidebar-logo {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid rgba(124, 92, 252, 0.1);
    min-height: 70px;
    flex-shrink: 0;
}

.sidebar-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-logo .logo-text {
    overflow: hidden;
    white-space: nowrap;
    transition: all var(--transition-normal);
}

.sidebar.collapsed .logo-text {
    opacity: 0;
    width: 0;
    margin: 0;
}

.sidebar-logo .logo-name {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-dark);
    letter-spacing: -0.02em;
}

body.dark-mode .sidebar-logo .logo-name {
    color: #f1f5f9;
}

.sidebar-logo .logo-sub {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
}

.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 16px 12px;
    scrollbar-width: thin;
    scrollbar-color: rgba(124, 92, 252, 0.2) transparent;
}

.sidebar-menu::-webkit-scrollbar {
    width: 4px;
}

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

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(124, 92, 252, 0.2);
    border-radius: 50px;
}

.sidebar-menu-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 12px 12px 8px;
    white-space: nowrap;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.sidebar.collapsed .sidebar-menu-label {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
}

.sidebar-menu-item {
    margin-bottom: 2px;
}

.sidebar-menu-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 12px;
    color: var(--text-body);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
    position: relative;
}

.sidebar-menu-link:hover {
    background: rgba(124, 92, 252, 0.08);
    color: var(--primary);
}

.sidebar-menu-link.active {
    background: rgba(124, 92, 252, 0.12);
    color: var(--primary);
    font-weight: 600;
}

.sidebar-menu-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 0 50px 50px 0;
}

.sidebar-menu-link .menu-icon {
    width: 22px;
    text-align: center;
    font-size: 16px;
    flex-shrink: 0;
}

.sidebar-menu-link .menu-text {
    overflow: hidden;
    transition: all var(--transition-normal);
}

.sidebar.collapsed .sidebar-menu-link .menu-text {
    opacity: 0;
    width: 0;
}

.sidebar-menu-link .menu-arrow {
    margin-left: auto;
    font-size: 10px;
    transition: transform var(--transition-normal);
    opacity: 0.5;
}

.sidebar.collapsed .sidebar-menu-link .menu-arrow {
    opacity: 0;
    width: 0;
}

.sidebar-menu-link[aria-expanded="true"] .menu-arrow {
    transform: rotate(90deg);
}

.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    padding-left: 20px;
}

.sidebar-submenu.show {
    max-height: 600px;
}

.sidebar.collapsed .sidebar-submenu {
    display: none;
}

.sidebar-submenu-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 10px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.sidebar-submenu-link::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(139, 144, 163, 0.3);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.sidebar-submenu-link:hover {
    color: var(--primary);
}

.sidebar-submenu-link:hover::before {
    background: var(--primary);
}

.sidebar-submenu-link.active {
    color: var(--primary);
    font-weight: 600;
}

.sidebar-submenu-link.active::before {
    background: var(--primary);
    box-shadow: 0 0 8px rgba(124, 92, 252, 0.4);
}

.sidebar-bottom {
    padding: 16px;
    border-top: 1px solid rgba(124, 92, 252, 0.1);
    flex-shrink: 0;
}

.sidebar-bottom .glass-btn {
    width: 100%;
}

.sidebar.collapsed .sidebar-bottom .btn-text {
    display: none;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 10, 46, 0.5);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

@media (max-width: 767px) {
    .sidebar {
        transform: translateX(-100%);
        width: 260px !important;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }
}