.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: #ffffff;
    color: var(--secondary-blue);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    z-index: 1000;
    box-shadow: 1px 0 0 var(--light-silver), 4px 0 20px rgba(15,159,196,0.06);
    overflow: hidden;
    border-right: 1px solid var(--light-silver);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--light-silver);
    text-align: center;
    background: #ffffff;
}

.sidebar-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.sidebar.collapsed .sidebar-logo {
    width: 40px;
    height: 40px;
    margin-bottom: 0;
}

.sidebar-title {
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .sidebar-title {
    opacity: 0;
    display: none;
}

.sidebar-title h5 {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    letter-spacing: 0.6px;
    color: var(--secondary-blue);
    font-family: 'Red Hat Display', sans-serif;
    text-transform: uppercase;
}

.sidebar-title p {
    font-size: 0.62rem;
    color: var(--slate);
    margin: 0;
    letter-spacing: 0.1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--light-silver);
    border-radius: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.7rem 1.25rem;
    color: var(--slate);
    text-decoration: none;
    transition: all 0.2s ease;
    position: relative;
    margin: 2px 0.5rem;
    border-radius: 8px;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--pale-cyan);
    color: var(--primary-blue);
    border-left-color: var(--soft-cyan);
}

.nav-item.active {
    background: var(--pale-cyan);
    color: var(--primary-blue);
    border-left: 3px solid var(--primary-blue);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(15,159,196,0.12);
}

.nav-item i {
    font-size: 1rem;
    width: 24px;
    text-align: center;
    margin-right: 0.875rem;
    transition: margin 0.3s ease;
    color: var(--slate);
}

.nav-item:hover i,
.nav-item.active i {
    color: var(--primary-blue);
}

.sidebar.collapsed .nav-item i {
    margin-right: 0;
}

.nav-text {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    transition: opacity 0.3s ease;
    letter-spacing: 0.2px;
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    display: none;
}

.sidebar-footer {
    padding: 0.75rem 1rem 0.625rem;
    border-top: 1px solid var(--light-silver);
    text-align: center;
    background: #ffffff;
}

.sidebar-credit {
    font-size: 0.58rem;
    color: #c8cdd8;
    margin-top: 0.4rem;
    margin-bottom: 0;
    white-space: nowrap;
    letter-spacing: 0.2px;
    font-weight: 400;
}

.company-logo {
    max-width: 120px;
    height: auto;
    object-fit: contain;
    transition: all 0.3s ease;
}

.sidebar.collapsed .company-logo {
    max-width: 40px;
}

@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
        display: none;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}