body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Layout */
.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar styles */
.sidebar {
    width: 280px;
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    background-color: rgba(0, 0, 0, 0.2);
}

.sidebar-user {
    background-color: rgba(0, 0, 0, 0.1);
}

.sidebar-user-info small {
    color: rgba(255, 255, 255, 0.6) !important;
}

.sidebar .nav-link {
    padding: 0.8rem 1rem;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s;
    border-radius: 5px;
    margin: 2px 0;
}

.sidebar .nav-link:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.2);
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 20px;
    transition: margin-left 0.3s;
}

/* Loading page styles */
.loading-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

.loading-text {
    color: #2c3e50;
    font-size: 1.2rem;
    margin: 0;
    font-weight: 500;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Form styles */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

.card-body {
    background-color: white;
    border-radius: 10px;
}

.form-control:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
    padding: 10px;
    font-weight: 500;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

/* Dashboard color variants */
.bg-purple {
    background-color: #6f42c1 !important;
}

.bg-orange {
    background-color: #fd7e14 !important;
}

.bg-dark {
    background-color: #343a40 !important;
}

.text-purple {
    color: #6f42c1 !important;
}

.text-orange {
    color: #fd7e14 !important;
}

.alert {
    border-radius: 5px;
    margin-bottom: 20px;
}

/* Responsive styles */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        min-height: auto;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .wrapper {
        flex-direction: column;
    }
}