:root {
    --primary-color: #1E88E5;
    --primary-hover: #1976D2;
    --secondary-color: #FFC107;
    --secondary-hover: #FFA000;
    --success-color: #4CAF50;
    --danger-color: #F44336;
    --warning-color: #FF9800;
    --info-color: #2196F3;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --sidebar-width: 250px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
}

/* Sidebar */
#sidebar {
    background-color: #ffffff;
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    min-height: 100vh;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    z-index: 999;
}

#sidebar.collapsed {
    margin-left: calc(var(--sidebar-width) * -1);
}

.sidebar-header {
    padding: 1.5rem 1rem;
}

#sidebar .nav-link {
    color: #6c757d;
    padding: 0.75rem 1rem;
    border-radius: 0.25rem;
    margin: 0.2rem 0.5rem;
    transition: all 0.3s;
}

#sidebar .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(30, 136, 229, 0.1);
}

#sidebar .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(30, 136, 229, 0.1);
    font-weight: 500;
}

#sidebar .nav-link i {
    margin-right: 0.5rem;
}

/* Main content */
main {
    transition: all 0.3s;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    padding: 1rem;
}

.stat-card {
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary-color);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-warning {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-warning:hover {
    background-color: var(--secondary-hover);
    border-color: var(--secondary-hover);
}

/* Tables */
.table th {
    font-weight: 600;
    color: #495057;
}

.product-thumbnail {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.25rem;
}

/* Profile */
.profile-avatar img {
    width: 120px;
    height: 120px;
    object-fit: cover;
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    background-color: #e9ecef;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #adb5bd;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 767.98px) {
    #sidebar {
        margin-left: calc(var(--sidebar-width) * -1);
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 999;
    }
    
    #sidebar.show {
        margin-left: 0;
    }
    
    .navbar-toggler {
        display: block;
    }
}