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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.2em;
    opacity: 0.9;
}

.upload-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 10px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #5a67d8;
    background-color: #f8f9ff;
}

.upload-area.dragover {
    border-color: #4c51bf;
    background-color: #edf2f7;
}

.upload-icon {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 15px;
}

.upload-text {
    font-size: 1.2em;
    color: #4a5568;
    margin-bottom: 10px;
}

.upload-subtext {
    color: #718096;
    font-size: 0.9em;
}

#fileInput {
    display: none;
}