body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
}

.logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 1rem;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    background: linear-gradient(45deg, #2196F3, #1976D2) !important;
    padding: 1.5rem;
}

.card-body {
    padding: 2rem;
}

.form-control {
    border-radius: 10px;
    border: 1px solid #dee2e6;
    padding: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    box-shadow: 0 0 0 0.2rem rgba(33, 150, 243, 0.25);
    border-color: #2196F3;
}

.btn-primary {
    background: linear-gradient(45deg, #2196F3, #1976D2);
    border: none;
    padding: 12px 35px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(33, 150, 243, 0.3);
}

.progress {
    height: 25px;
    border-radius: 12px;
    margin-bottom: 15px;
    background-color: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    border-radius: 12px;
    transition: width 0.6s ease;
}

.progress-group {
    margin-bottom: 1.5rem;
}

.progress-group label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

.alert {
    border-radius: 10px;
    border: none;
    padding: 1.25rem;
}

.alert-heading {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

#sentiment {
    font-size: 1.2em;
    font-weight: 700;
}

/* Footer styles */
.footer {
    margin-top: auto;
    padding: 20px 0;
    background: linear-gradient(45deg, #2196F3, #1976D2);
    color: white;
}

.footer-text {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Animation for the result section */
#result {
    animation: fadeIn 0.5s ease-in;
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn-primary {
        width: 100%;
    }
    
    .logo {
        max-width: 150px;
    }
    
    .footer-text {
        font-size: 1rem;
    }
}