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

body {
    background: white;
    color: #333;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 600px;
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    border: 1px solid #eaeaea;
}

header {
    background: linear-gradient(to right, #4776E6, #8E54E9);
    color: white;
    text-align: center;
    padding: 30px 20px;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

header p {
    font-size: 0.95rem;
    opacity: 0.9;
}

.main-content {
    padding: 30px;
}

.upload-section {
    margin-bottom: 25px;
}

.upload-area {
    border: 3px dashed #8E54E9;
    border-radius: 12px;
    padding: 35px 20px;
    text-align: center;
    background-color: #f9f7ff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover, .upload-area.drag-over {
    background-color: #eef2ff;
    border-color: #4776E6;
}

.upload-icon {
    font-size: 50px;
    color: #8E54E9;
    margin-bottom: 15px;
}

.upload-text {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #555;
}

.upload-button {
    background: linear-gradient(to right, #4776E6, #8E54E9);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(142, 84, 233, 0.3);
}

.upload-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 18px rgba(142, 84, 233, 0.5);
}

.file-counter {
    text-align: center;
    margin: 20px 0;
    font-size: 1.1rem;
    color: #666;
}

.counter {
    font-weight: bold;
    color: #4776E6;
    font-size: 1.2rem;
}

.progress-container {
    width: 100%;
    height: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    margin: 20px 0 25px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(to right, #2ecc71, #1abc9c);
    width: 0%;
    border-radius: 5px;
    transition: width 0.4s ease;
}

.submit-section {
    text-align: center;
    margin-bottom: 25px;
}

.submit-button {
    background: linear-gradient(to right, #2ecc71, #1abc9c);
    color: white;
    border: none;
    padding: 14px 45px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 18px rgba(46, 204, 113, 0.3);
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(46, 204, 113, 0.5);
}

.submit-button:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.info-section {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-top: 25px;
    border-left: 4px solid #8E54E9;
}

.info-title {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    color: #444;
}

.info-title i {
    margin-right: 10px;
    color: #8E54E9;
}

.info-content {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #f8f9fa;
    color: #666;
    font-size: 0.85rem;
    border-top: 1px solid #eaeaea;
}

@media (max-width: 768px) {
    .container {
        max-width: 95%;
    }
    
    header {
        padding: 25px 15px;
    }
    
    .main-content {
        padding: 25px 20px;
    }
    
    .upload-area {
        padding: 30px 15px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.6rem;
    }
    
    .upload-text {
        font-size: 1rem;
    }
    
    .file-counter {
        font-size: 1rem;
    }
    
    .submit-button {
        padding: 12px 35px;
        font-size: 1rem;
    }
}