.sidebar {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    transition: all 0.3s ease;
    z-index: 100;
    box-shadow: -4px 0 15px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.sidebar-logo:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.sidebar-logo .icon {
    width: 24px;
    height: 24px;
    stroke: white;
}

.sidebar-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    padding-right: 0.5rem;
}

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

.sidebar-menu::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.menu-category {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin: 1.5rem 0 0.5rem;
    padding-right: 1rem;
    position: relative;
    font-weight: 500;
}

.menu-category::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    border-radius: 12px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.menu-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(-5px);
}

.menu-item:hover::before {
    opacity: 1;
}

.menu-item.active {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.menu-item .icon {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    stroke-width: 1.5;
    transition: transform 0.3s ease;
}

.menu-item:hover .icon {
    transform: scale(1.1);
}

.menu-item span {
    font-size: 0.95rem;
    font-weight: 500;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.settings-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 12px;
    color: white;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.settings-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.settings-btn .icon {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    transition: transform 0.3s ease;
}

.settings-btn:hover .icon {
    transform: rotate(30deg);
}

.main-container {
    margin-right: 280px;
    transition: all 0.3s ease;
}

.sidebar-toggle {
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.sidebar-toggle:hover {
    background: #3498db;
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.sidebar.collapsed {
    width: 80px;
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .menu-category,
.sidebar.collapsed .menu-item span {
    display: none;
}

.sidebar.collapsed ~ .main-container {
    margin-right: 146px;
}

.sidebar.collapsed .menu-item {
    justify-content: center;
    padding: 1rem;
}

.sidebar.collapsed .settings-btn {
    justify-content: center;
}

.sidebar.collapsed .settings-btn span {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-container {
        margin-right: 0;
    }
}