.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--gray-900);
}

.sidebar-brand img {
    width: 40px;
    height: 40px;
    margin-right: 0.75rem;
}

.sidebar-brand h4 {
    margin: 0;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-nav-item {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition-fast);
    border-radius: 0;
    position: relative;
    border-left: 3px solid transparent;
}

.sidebar-nav-item:hover {
    background: var(--gray-100);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-nav-item.active {
    background: rgba(0, 81, 162, 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.sidebar-nav-item i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 18px;
}

.sidebar-nav-item .badge {
    margin-left: auto;
}

.sidebar-section {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 0.5rem;
}

.sidebar-footer {
    position: sticky;
    bottom: 0;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

.sidebar-user {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background: var(--gray-100);
    border-radius: var(--card-radius);
    margin-bottom: 1rem;
}

.sidebar-user img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 0.75rem;
}

.sidebar-user-info h6 {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 600;
}

.sidebar-user-info small {
    color: var(--gray-600);
    font-size: 0.75rem;
}

.sidebar-emergency {
    margin-top: 1rem;
}

.sidebar-emergency .btn {
    width: 100%;
    background: var(--danger-color);
    color: white;
    font-weight: 600;
    border-radius: var(--card-radius);
    padding: 0.75rem;
    border: none;
    transition: var(--transition-fast);
}

.sidebar-emergency .btn:hover {
    background: #c82333;
    transform: translateY(-2px);
}

.sidebar-collapse {
    display: none;
}

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--gray-100);
    transition: var(--transition);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 100%;
        max-width: 320px;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-collapse {
        display: block;
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 1001;
        background: var(--white);
        border: 1px solid var(--gray-200);
        border-radius: 50%;
        width: 50px;
        height: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: var(--shadow-lg);
        cursor: pointer;
        transition: var(--transition-fast);
    }
    
    .sidebar-collapse:hover {
        background: var(--primary-color);
        color: white;
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-fast);
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
}

/* Tablet Responsive */
@media (max-width: 1024px) and (min-width: 769px) {
    .sidebar {
        width: 240px;
    }
    
    .main-content {
        margin-left: 240px;
    }
}

/* Animations */
.sidebar-nav-item {
    transition: all 0.2s ease;
}

.sidebar-nav-item:hover {
    padding-left: 2rem;
}