@import url('https://fonts.googleapis.com/css2?family=Poppins&display=swap');

*,
::after,
::before {
    box-sizing: border-box;
}

body {
    margin: 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
	font-size: 1rem;
	font-weight: 400;
	line-height: 1.5;
	color: #212529;
	text-align: left;
	background-color: #fff;	
}

h3 {
    font-size: 1.2375rem;
    color: #FFF;
}

a {
    cursor: pointer;
    text-decoration: none;
    font-family: 'Poppins', sans-serif;
}

li {
    list-style: none;
}

/* Layout skeleton */

.wrapper {
    align-items: stretch;
    display: flex;
    width: 100%;
}

#sidebar {
    max-width: 264px;
    min-width: 264px;
    transition: all 0.35s ease-in-out;
    box-shadow: 0 0 20px 0 rgba(49, 57, 66, 0.5);
    z-index: 1111;
	background: #26D0CE;  /* fallback for old browsers */
	background: -webkit-linear-gradient(to right, #005C97, #26D0CE);  /* Chrome 10-25, Safari 5.1-6 */
	background: linear-gradient(145deg, #005C97, #26D0CE); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

/* Sidebar collapse */

#sidebar.collapsed {
    margin-left: -264px;
}

.main {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    overflow: hidden;
    transition: all 0.35s ease-in-out;
}

.sidebar-logo {
    padding: 1.15rem 1.5rem;
}

.sidebar-logo a {
    color: #e9ecef;
    font-size: 1.25rem;
    font-weight: 600;
	margin: 0px 15px;
}

.sidebar-nav {
    padding: 0;
}

.sidebar-header {
    color: #e9ecef;
    font-size: .75rem;
    padding: 1.5rem 1.5rem .375rem;
}

a.sidebar-link {
    padding: .625rem 1.625rem;
    color: #e9ecef;
    position: relative;
    display: block;
    font-size: 1rem;
}

.sidebar-link[data-bs-toggle="collapse"]::after {
    border: solid;
    border-width: 0 .075rem .075rem 0;
    content: "";
    display: inline-block;
    padding: 2px;
    position: absolute;
    right: 1.5rem;
    top: 1.4rem;
    transform: rotate(-135deg);
    transition: all .2s ease-out;
}

.sidebar-link[data-bs-toggle="collapse"].collapsed::after {
    transform: rotate(45deg);
    transition: all .2s ease-out;
}

.sidebar-nav {
    color: #fff;
}

.sidebar-nav li a {
    color: #fff;
    text-decoration: none;
    width: 100%;
    display: block;
    border-radius: 5px;
    padding: 8px 16px;
}

.vsidebar-nav li a.active {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar-nav li a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar-nav li a i {
    width: 25px;
    text-align: center;
}

.content {
    flex: 1;
    max-width: 100vw;
    width: 100vw;
}

/* Responsive */

@media (min-width:768px) {
    .content {
        width: auto;
    }
}

<!-- Tab Gradient -->
body {
    background: #f8f9fa;
    padding: 2rem 0;
}

.gradient-tabs {
    background: #26D0CE;  /* fallback for old browsers */
	background: -webkit-linear-gradient(to right, #005C97, #26D0CE);  /* Chrome 10-25, Safari 5.1-6 */
	background: linear-gradient(145deg, #005C97, #26D0CE); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    padding: 1rem;
    border-radius: 1rem;
}

.gradient-tabs .nav-tabs {
    border: none;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.gradient-tabs .nav-link {
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
}

.gradient-tabs .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.gradient-tabs .nav-link.active {
    background: white;
    color: #6366f1;
}

.gradient-tabs .tab-content {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
}

/* Content Animation */
.tab-pane.fade {
    transition: all 0.2s ease-out;
}

.tab-pane.fade.show {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}