.main-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-page);
}

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #1a1f36 0%, #2d3340 100%);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    color: white;
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.15), 1px 0 0 rgba(255, 255, 255, 0.05) inset;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 99;
    display: none;
}

.sidebar-overlay.show {
    display: block;
}

.sidebar-brand {
    padding: 24px 20px;
    background: linear-gradient(135deg, rgba(74, 108, 247, 0.4) 0%, rgba(107, 140, 255, 0.3) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.brand-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.brand-icon i {
    font-size: 22px;
    color: white;
}

.brand-text h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.2px;
}

.brand-text span {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
}

.nav-section {
    flex: 1;
    padding: 20px 10px;
    overflow-y: auto;
}

.nav-section-title {
    font-size: 10px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0 12px;
    margin-bottom: 12px;
}

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

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

.nav-item {
    margin-bottom: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.1px;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.05);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-link i {
    font-size: 18px;
    width: 22px;
    text-align: center;
    transition: transform var(--transition-fast);
}

.nav-link:hover {
    color: white;
    transform: translateX(4px);
}

.nav-link:hover i {
    transform: scale(1.1);
}

.nav-link.active {
    background: linear-gradient(135deg, rgba(74, 108, 247, 0.5) 0%, rgba(107, 140, 255, 0.4) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(74, 108, 247, 0.3);
    border-left: 3px solid #6b8cff;
}

.nav-link.active i {
    transform: scale(1.1);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius);
    transition: background var(--transition-fast);
}

.user-card:hover {
    background: rgba(255, 255, 255, 0.08);
}

.user-card .avatar {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #4a6cf7 0%, #6b8cff 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(74, 108, 247, 0.3);
}

.user-card .avatar i {
    color: white;
    font-size: 16px;
}

.user-card .info h4 {
    font-size: 13px;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.1px;
}

.user-card .info p {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}