.tools-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
}

.tools-container h1 {
    text-align: center;
    color: #1e7554;
    margin-bottom: 20px;
}

.intro-text {
    text-align: center;
    margin-bottom: 30px;
    color: #666;
}

.drop-zone {
    border: 3px dashed #1e7554;
    border-radius: 12px;
    padding: 60px 40px;
    text-align: center;
    background-color: #f8f9fa;
    transition: all 0.3s ease;
    cursor: pointer;
    margin-bottom: 20px;
}

.drop-zone:hover {
    background-color: #e8f5f1;
    border-color: #16654a;
}

.drop-zone.dragover {
    background-color: #d4edda;
    border-color: #28a745;
    transform: scale(1.02);
}

.drop-zone-content i {
    font-size: 64px;
    color: #1e7554;
    margin-bottom: 20px;
}

.drop-zone-content p {
    font-size: 20px;
    color: #333;
    margin: 10px 0;
}

.drop-zone-content span {
    display: block;
    color: #999;
    margin: 15px 0;
}

.file-label {
    display: inline-block;
    padding: 12px 30px;
    background-color: #1e7554;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

.file-label:hover {
    background-color: #16654a;
}

.file-name {
    margin-top: 15px;
    color: #1e7554;
    font-weight: 600;
    min-height: 20px;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background-color: #1e7554;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover:not(:disabled) {
    background-color: #16654a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 117, 84, 0.3);
}

.submit-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .tools-container {
        padding: 15px;
        margin: 20px auto;
    }
    
    .drop-zone {
        padding: 40px 20px;
    }
    
    .drop-zone-content i {
        font-size: 48px;
    }
    
    .drop-zone-content p {
        font-size: 16px;
    }
}