:root {
    --primary-color: #4A90E2;
    --accent-color: #50E3C2;
    --background-color: #F8F9FA;
    --surface-color: #FFFFFF;
    --text-color: #343A40;
    --sidebar-bg: #2c3e50;
    --sidebar-text: #ecf0f1;
    --sidebar-active: #4A90E2;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
}

.sidebar {
    width: 280px;
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
}

.sidebar .nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--sidebar-text);
    transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
}

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

.sidebar .nav-link.active {
    background-color: var(--sidebar-active);
    color: #fff;
}

.sidebar .nav-link .bi {
    font-size: 1.2rem;
}

.main-content {
    margin-left: 280px;
    width: calc(100% - 280px);
}

.card {
    border: none;
    border-radius: .5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

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

.btn-primary:hover {
    background-color: #357ABD;
    border-color: #357ABD;
}