/* Global Styles */
:root {
    --primary-color: #4a6bff;
    --primary-hover: #3a5bef;
    --secondary-color: #f5f7ff;
    --text-color: #333;
    --light-gray: #e0e0e0;
    --medium-gray: #999;
    --dark-gray: #666;
    --danger: #ff4a4a;
    --success: #4aff4a;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9faff;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

/* Header Styles */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    margin-bottom: 10px;
    font-size: 2.5rem;
}

/* Main Content Styles */
main {
    padding: 30px;
}

section {
    margin-bottom: 40px;
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

section h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    font-size: 1.8rem;
}

/* Upload Area Styles */
.upload-area {
    border: 2px dashed var(--light-gray);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--secondary-color);
}

.upload-label {
    display: block;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-placeholder img {
    width: 60px;
    height: 60px;
    margin-bottom: 15px;
    opacity: 0.7;
}

.upload-placeholder p {
    margin-bottom: 5px;
    color: var(--dark-gray);
}

.upload-placeholder .small {
    font-size: 0.8rem;
    color: var(--medium-gray);
}

.image-preview {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.btn-remove {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: var(--danger);
    color: white;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--box-shadow);
}

/* Control Styles */
.replication-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-weight: 600;
    color: var(--dark-gray);
}

.control-group input[type="number"],
.control-group input[type="range"],
.control-group select {
    padding: 10px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.control-group input[type="number"]:focus,
.control-group input[type="range"]:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.2);
}

.control-group input[type="range"] {
    width: 100%;
    padding: 0;
}

/* Button Styles */
.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

.btn-secondary:hover {
    background-color: #d0d0d0;
}

/* Result Section Styles */
.result-container {
    margin: 20px 0;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    padding: 20px;
    min-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: auto;
}

.result-container img {
    max-width: 100%;
    height: auto;
}

.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

/* Footer Styles */
footer {
    background-color: var(--secondary-color);
    padding: 20px;
    text-align: center;
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    header {
        padding: 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 15px;
    }
    
    section {
        padding: 15px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

/* Utility Classes */
[hidden] {
    display: none !important;
}

.drag-over {
    border-color: var(--primary-color);
    background-color: var(--secondary-color);
}