body {
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
}

/* Upload area styles */
.upload-area {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area.active {
    border-color: #0d6efd;
    background-color: rgba(13, 110, 253, 0.05);
}

.upload-area:hover {
    border-color: #0d6efd;
}

/* Table styles */
.table th, .table td {
    vertical-align: middle;
}

.btn-group-sm .btn {
    padding: 0.25rem 0.5rem;
}

/* Animation for alerts */
.alert {
    animation: fadeIn 0.5s;
}

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

/* Hover effect for table rows */
.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

/* Custom styling for modals */
.modal-header.bg-danger {
    color: white;
}

/* Login page styles */
.login-container {
    max-width: 400px;
    margin: 100px auto;
}

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

.login-container .card-header {
    background-color: #0d6efd;
    color: white;
    text-align: center;
    padding: 1.5rem;
}

.login-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Navbar styles */
.navbar-brand {
    font-weight: bold;
}

/* Footer styles */
footer {
    margin-top: auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .btn-group-sm .btn {
        padding: 0.375rem 0.75rem;
    }
    
    .login-container {
        margin: 50px auto;
    }
}