* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2rem;
}

p {
    margin-bottom: 30px;
    color: #7f8c8d;
}

.upload-section {
    margin-bottom: 30px;
}

input[type="file"] {
    display: none;
}

.upload-label {
    display: inline-block;
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-label:hover {
    background-color: #2980b9;
}

.controls {
    margin: 30px 0;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    background-color: #2ecc71;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 14px;
}

button:hover {
    background-color: #27ae60;
}

#removeWatermarkBtn {
    background-color: #e74c3c;
}

#removeWatermarkBtn:hover {
    background-color: #c0392b;
}

#enhanceBtn {
    background-color: #3498db;
}

#enhanceBtn:hover {
    background-color: #2980b9;
}

#upscaleBtn {
    background-color: #9b59b6;
}

#upscaleBtn:hover {
    background-color: #8e44ad;
}

#resetBtn {
    background-color: #95a5a6;
}

#resetBtn:hover {
    background-color: #7f8c8d;
}

.image-container {
    margin: 30px 0;
}

.image-wrapper {
    position: relative;
    display: inline-block;
    overflow: auto;
    max-width: 100%;
    margin: 0 auto;
}

canvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    background-color: #ecf0f1;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.download-section {
    margin-top: 20px;
}

#downloadLink {
    display: inline-block;
    padding: 10px 20px;
    background-color: #f39c12;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

#downloadLink:hover {
    background-color: #e67e22;
}

.loading {
    font-size: 18px;
    color: #7f8c8d;
    padding: 20px;
    text-align: center;
}

@media (max-width: 600px) {
    .button-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}