:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --light-gray: #f5f5f5;
    --dark-gray: #333;
    --text-color: #444;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9f9f9;
    padding: 20px;
    padding-bottom: 40px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 2.5rem;
    text-align: center;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.description {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-color);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.compressor-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
    background-color: var(--light-gray);
}

.upload-area:hover {
    background-color: rgba(66, 133, 244, 0.1);
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-area p {
    margin-bottom: 10px;
}

.upload-area input {
    display: none;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #3367d6;
}

.btn-secondary {
    background-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #2d9249;
}

.btn-clear {
    background-color: #f44336;
    margin-left: 10px;
}

.btn-clear:hover {
    background-color: #d32f2f;
}

.button-group {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.control-group {
    flex: 1;
    min-width: 250px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

select, input[type="range"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
}

input[type="range"] {
    height: 8px;
    background: #ddd;
    border-radius: 5px;
    padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.quality-value {
    text-align: center;
    font-weight: 600;
    margin-top: 5px;
}

.preview-container {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 40px;
}

.image-preview {
    flex: 1;
    min-width: 300px;
}

.image-preview h3 {
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.preview-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.file-info {
    margin-top: 15px;
    background-color: var(--light-gray);
    padding: 15px;
    border-radius: var(--border-radius);
}

.file-info p {
    margin-bottom: 8px;
}

.download-btn {
    display: block;
    margin-top: 20px;
    text-align: center;
}

.hidden {
    display: none;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #777;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.footer-link:hover {
    text-decoration: none;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .preview-container {
        flex-direction: column;
    }
    
    .controls {
        flex-direction: column;
        gap: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
}