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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 600px;
    width: 100%;
}

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

header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
}

header p {
    color: #666;
    font-size: 14px;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #f8f9ff;
}

.upload-area:hover {
    border-color: #764ba2;
    background: #f0f2ff;
}

.upload-area.dragover {
    border-color: #764ba2;
    background: #e8ebff;
    transform: scale(1.02);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: #667eea;
}

.upload-text {
    font-size: 18px;
    color: #333;
    font-weight: 500;
}

.upload-hint {
    font-size: 14px;
    color: #999;
}

.btn-select {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-select:hover {
    background: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.file-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9ff;
    border-radius: 8px;
    margin-top: 20px;
}

.file-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.file-name {
    font-weight: 500;
    color: #333;
}

.file-size {
    font-size: 12px;
    color: #666;
}

.btn-remove {
    background: #ff4757;
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-remove:hover {
    background: #ff3838;
    transform: rotate(90deg);
}

.progress-container {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    font-size: 14px;
    font-weight: 500;
    color: #667eea;
    min-width: 40px;
}

.btn-upload {
    width: 100%;
    background: #667eea;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.btn-upload:hover {
    background: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-upload:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.result {
    margin-top: 30px;
    padding: 20px;
    border-radius: 8px;
}

.result-success {
    text-align: center;
}

.result-success h2 {
    color: #2ed573;
    margin-bottom: 20px;
    font-size: 24px;
}

.result-links {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 20px;
}

.btn-link {
    background: #667eea;
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-link:hover {
    background: #764ba2;
    transform: translateY(-2px);
}

.qr-code-container {
    margin-top: 20px;
    text-align: center;
}

.qr-code-container img {
    max-width: 200px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 10px;
    background: white;
}

.result-error {
    text-align: center;
    padding: 20px;
    background: #fff5f5;
    border-radius: 8px;
    border: 2px solid #ff4757;
}

.result-error h2 {
    color: #ff4757;
    margin-bottom: 10px;
}

.result-error p {
    color: #666;
}