body {
    background-color: #f8f9fa;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    color: #4a5568;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-weight: 600;
    color: #2d3748;
    letter-spacing: -0.02em;
}

.navbar-brand {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-weight: 600;
    font-size: 1.5rem;
    letter-spacing: 0.5px;
}

.content-section {
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    border: 1px solid #e0e0e0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    margin-bottom: 1.5rem;
    background-color: #ffffff;
}

.card-header {
    background-color: #6b7c8f;
    color: #ffffff;
    border-bottom: 2px solid #5a6c7d;
    font-weight: 500;
    padding: 1rem 1.25rem;
}

.table th {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: #6b7c8f;
    color: #ffffff;
    font-weight: 500;
    border-top: none;
    border-bottom: 2px solid #5a6c7d;
    padding: 0.85rem;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

.table td {
    padding: 0.85rem;
    border-color: #e8e8e8;
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: #f5f7fa;
}

.badge {
    padding: 0.5em 0.75em;
    font-weight: 500;
}

.list-group-item {
    border-left: 4px solid transparent;
    transition: all 0.2s;
    border-color: #e8e8e8;
    padding: 1rem 1.25rem;
}

.list-group-item:hover {
    border-left-color: #6b7c8f;
    background-color: #f5f7fa;
}

.btn {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    transition: all 0.2s;
    font-weight: 500;
    letter-spacing: 0.3px;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.btn-primary {
    background-color: #6b7c8f;
    border-color: #5a6c7d;
}

.btn-primary:hover {
    background-color: #5a6c7d;
    border-color: #4a5568;
}

.btn-info {
    background-color: #3498db;
    border-color: #2980b9;
}

.btn-success {
    background-color: #27ae60;
    border-color: #229954;
}

.btn-danger {
    background-color: #e74c3c;
    border-color: #c0392b;
}

.modal-header {
    background-color: #6b7c8f;
    color: white;
    border-bottom: 2px solid #5a6c7d;
}

.modal-header .btn-close {
    filter: invert(1);
}

.status-badge {
    padding: 0.4em 0.75em;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.status-planning {
    background-color: #7f8c8d;
    color: white;
}

.status-in-progress {
    background-color: #27ae60;
    color: white;
}

.status-completed {
    background-color: #3498db;
    color: white;
}

.status-on-hold {
    background-color: #f39c12;
    color: white;
}

.activity-item {
    padding: 0.85rem 1.15rem;
    border-left: 4px solid #6b7c8f;
    margin-bottom: 0.5rem;
    background-color: white;
    border-radius: 4px;
    border: 1px solid #e8e8e8;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.activity-item.autodesk {
    border-left-color: #e67e22;
}

.activity-item.line {
    border-left-color: #27ae60;
}

.activity-item.system {
    border-left-color: #7f8c8d;
}

/* Additional formal styling */
.navbar {
    background-color: #6b7c8f !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    letter-spacing: 0.3px;
    transition: color 0.2s;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link.active {
    color: #ffffff;
    font-weight: 500;
}

.card-body {
    padding: 1.5rem;
}

.form-control, .form-select {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    border: 1px solid #d0d0d0;
    border-radius: 4px;
    padding: 0.6rem 0.85rem;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus, .form-select:focus {
    border-color: #6b7c8f;
    box-shadow: 0 0 0 0.2rem rgba(107, 124, 143, 0.15);
}

/* Stats cards formal styling */
.card.text-white.bg-info {
    background-color: #3498db !important;
    border: none;
}

.card.text-white.bg-success {
    background-color: #27ae60 !important;
    border: none;
}

.card.text-white.bg-warning {
    background-color: #f39c12 !important;
    border: none;
}

.card.text-white.bg-primary {
    background-color: #6b7c8f !important;
    border: none;
}

.card.text-white .card-title {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.card.text-white h2 {
    color: #ffffff;
    font-weight: 600;
    font-size: 2.5rem;
}