body {
    font-family: 'Inter', sans-serif;
    background-color: #F8F9FA;
}

.main-container {
    display: flex;
    padding-top: 56px; /* Height of navbar */
    height: 100vh;
}

.sidebar {
    width: 280px;
    flex-shrink: 0;
    transition: width 0.3s ease;
}

.main-content {
    flex-grow: 1;
    overflow-y: auto;
}

.navbar-brand {
    letter-spacing: -0.5px;
}

.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.btn-primary {
    background: linear-gradient(145deg, #0D6EFD, #0A58CA);
    border: none;
    transition: transform 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.content-placeholder {
    border: 2px dashed #e0e0e0;
}

.sidebar .list-group-item {
    background-color: transparent;
    border: none;
    font-weight: 500;
    color: #495057;
    padding: 0.75rem 0;
}

.sidebar .list-group-item i {
    margin-right: 10px;
    color: #6C757D;
}

.sidebar .list-group-item:hover {
    color: #0D6EFD;
}

.sidebar .list-group-item:hover i {
    color: #0D6EFD;
}