.sidebar-container {
    width: 280px;
    background: linear-gradient(to bottom, #ffffff, #f9f9f9);
    box-shadow: 4px 0 12px rgba(0, 0, 0, 0.06);
    position: fixed;
    top: 72px;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    border-right: 1px solid #dee2e6;
    z-index: 900;
    transition: transform 0.3s ease;
    border-top-right-radius: 12px;
}

.sidebar-close-btn {
    display: none;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: #666;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    border-radius: 50%;
    transition: all 0.3s ease;
    z-index: 1000;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
}

.sidebar-close-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #333;
    transform: rotate(90deg);
}

.sidebar-close-btn:active {
    transform: rotate(90deg) scale(0.95);
}

.sidebar {
    padding: 1rem 0.5rem;
}

.menu-item {
    border-radius: 10px;
    margin: 0.25rem 0.5rem;
    overflow: hidden;
    transition: background 0.3s ease;
}

.menu-title {
    display: flex;
    align-items: center;
    padding: 0.85rem 1rem;
    font-weight: 600;
    font-size: 15px;
    color: #333;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
    position: relative;
    border-radius: 10px;
    background-color: #f8f9fa;
}

.menu-title:hover {
    background-color: #e6f0ff;
    color: #0056b3;
}

.menu-icon {
    width: 24px;
    height: 24px;
    margin-right: 0.75rem;
    opacity: 0.9;
}

.menu-title::after {
    content: '';
    position: absolute;
    right: 1rem;
    width: 8px;
    height: 8px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    transform: rotate(45deg);
    transition: transform 0.3s ease;
}

@media (min-width: 769px) {
    .sidebar-close-btn {
        display: none !important;
    }

    .menu-item:hover .menu-title::after {
        transform: rotate(-135deg);
    }

    .menu-item:hover .submenu {
        max-height: 480px;
        opacity: 1;
        visibility: visible;
        overflow-y: auto;
    }

    .menu-item:hover .menu-title {
        background-color: #e6f0ff;
        color: #0056b3;
    }

    .menu-item:hover .submenu-item {
        transform: translateX(0);
        opacity: 1;
        animation: slideIn 0.3s ease forwards;
    }
}

.submenu {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background-color: #fefefe;
    transition: max-height 0.4s ease, opacity 0.3s ease, visibility 0.3s ease;
    padding-left: 0.5rem;
    border-left: 2px dashed #d0d0d0;
    margin-left: 0.5rem;
    border-radius: 0 0 10px 10px;
}

.submenu.open {
    max-height: 480px;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
}

.submenu-item {
    display: flex;
    align-items: center;
    padding: 0.6rem 1rem 0.6rem 1.5rem;
    font-size: 14px;
    color: #444;
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    transform: translateX(-20px);
    opacity: 0;
    border-radius: 6px;
}

.submenu-item:hover {
    background-color: #eaf4ff;
    color: #007bff;
    border-left-color: #007bff;
}

.submenu-icon {
    width: 32px;
    height: 32px;
    margin-right: 0.75rem;
    opacity: 0.7;
    object-fit: contain;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Стили для FontAwesome иконок */
.submenu-icon.fas {
    font-size: 16px;
    text-align: center;
    line-height: 1;
}

/* Стили для текстовых иконок (первая буква бренда) */
.submenu-icon.default-icon {
    background: linear-gradient(135deg, #6c757d, #495057);
    color: white;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    text-align: center;
    line-height: 32px;
}

/* Стили для изображений */
.submenu-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

@keyframes slideIn {
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .sidebar-container {
        transform: translateX(-100%);
        width: 100%;
        max-width: 320px;
        z-index: 1100;
        backdrop-filter: blur(10px);
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.99), rgba(255, 255, 255, 0.97)) !important;
        top: 50px;
        position: fixed;
        height: calc(100vh - 50px);
        border-right: 2px solid rgba(108, 117, 125, 0.1);
        transition: transform 0.3s ease;
    }

    .sidebar-close-btn {
        display: flex !important;
    }

    .sidebar-container.mobile-active {
        transform: translateX(0) !important;
        box-shadow: 8px 0 30px rgba(0, 0, 0, 0.15);
    }
    
    .sidebar {
        padding: 0.75rem 0.25rem !important;
    }

    .menu-item {
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.95)) !important;
        border: 1px solid rgba(108, 117, 125, 0.05);
        margin: 0.15rem 0.25rem !important;
        border-radius: 8px !important;
    }

    .menu-title {
        padding: 0.6rem 0.75rem !important;
        font-size: 13px !important;
        font-weight: 600 !important;
        border-radius: 8px !important;
        background-color: rgba(248, 249, 250, 0.9) !important;
    }

    .menu-icon {
        width: 20px !important;
        height: 20px !important;
        margin-right: 0.5rem !important;
    }

    .menu-title::after {
        right: 0.75rem !important;
        width: 6px !important;
        height: 6px !important;
    }

    .menu-item.open .menu-title::after {
        transform: rotate(-135deg) !important;
    }

    .submenu {
        max-height: 0 !important;
        opacity: 0 !important;
        visibility: hidden !important;
        background-color: rgba(254, 254, 254, 0.95) !important;
        padding-left: 0.25rem !important;
        border-left: 2px dashed rgba(208, 208, 208, 0.6) !important;
        margin-left: 0.25rem !important;
        border-radius: 0 0 8px 8px !important;
    }

    .submenu.open {
        max-height: 400px !important;
        opacity: 1 !important;
        visibility: visible !important;
        overflow-y: auto !important;
    }

    .submenu::-webkit-scrollbar {
        width: 4px !important;
    }

    .submenu::-webkit-scrollbar-track {
        background: rgba(248, 249, 250, 0.5) !important;
        border-radius: 2px !important;
    }

    .submenu::-webkit-scrollbar-thumb {
        background: rgba(108, 117, 125, 0.3) !important;
        border-radius: 2px !important;
    }

    .submenu::-webkit-scrollbar-thumb:hover {
        background: rgba(108, 117, 125, 0.5) !important;
    }

    .submenu-item {
        padding: 0.4rem 0.75rem 0.4rem 1rem !important;
        font-size: 12px !important;
        border-left: 2px solid transparent !important;
        transform: translateX(0) !important;
        opacity: 1 !important;
        border-radius: 4px !important;
        margin: 0.1rem 0.25rem !important;
    }

    .submenu.open .submenu-item {
        transform: translateX(0) !important;
        opacity: 1 !important;
        animation: none !important;
    }

    .submenu-icon {
        width: 24px !important;
        height: 24px !important;
        margin-right: 0.5rem !important;
        font-size: 12px !important;
    }

    .submenu-icon.default-icon {
        font-size: 10px !important;
        line-height: 24px !important;
    }

    .submenu-icon.fas {
        font-size: 12px !important;
    }



    body:has(.sidebar-container.mobile-active) {
        overflow: hidden !important;
    }

    body.mobile-menu-open {
        overflow: hidden !important;
    }
}

@media (max-width: 480px) {
    .sidebar-container {
        top: 45px;
        height: calc(100vh - 45px);
        max-width: 280px;
    }
    
    .sidebar {
        padding: 0.5rem 0.15rem !important;
    }

    .menu-item {
        margin: 0.1rem 0.15rem !important;
    }

    .menu-title {
        padding: 0.5rem 0.6rem !important;
        font-size: 12px !important;
    }

    .menu-icon {
        width: 18px !important;
        height: 18px !important;
        margin-right: 0.4rem !important;
    }

    .submenu-item {
        padding: 0.3rem 0.6rem 0.3rem 0.8rem !important;
        font-size: 11px !important;
    }

    .submenu-icon {
        width: 20px !important;
        height: 20px !important;
        margin-right: 0.4rem !important;
        font-size: 10px !important;
    }

    .submenu-icon.default-icon {
        font-size: 9px !important;
        line-height: 20px !important;
    }

    .submenu-icon.fas {
        font-size: 10px !important;
    }
}