.watermark-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin: 20px 0;
}
.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    text-align: center;
}
.card-header h1 { margin: 0; font-size: 2rem; font-weight: 600; }
.card-header p { margin: 10px 0 0 0; opacity: 0.9; }
.main-content { display: flex; gap: 20px; padding: 30px; }
.left-panel { flex: 1; min-width: 300px; }
.right-panel { flex: 2; min-width: 400px; }
.upload-section { background: rgba(248, 250, 252, 0.8); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.upload-area { border: 3px dashed #ddd; border-radius: 12px; padding: 40px 20px; text-align: center; transition: all 0.3s ease; cursor: pointer; background: white; }
.upload-area:hover, .upload-area.dragover { border-color: #667eea; background: rgba(102, 126, 234, 0.05); }
.upload-area i { font-size: 2.5rem; color: #667eea; margin-bottom: 15px; }
.upload-area h3 { color: #333; margin: 0 0 10px 0; font-size: 1.2rem; }
.upload-area p { color: #666; margin: 5px 0; font-size: 0.9rem; }
.file-input { display: none; }
.settings-section { background: rgba(248, 250, 252, 0.8); border-radius: 12px; padding: 20px; }
.settings-section h3 { margin: 0 0 20px 0; color: #333; display: flex; align-items: center; gap: 10px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; color: #333; }
.form-control { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; transition: border-color 0.3s ease; }
.form-control:focus { outline: none; border-color: #667eea; box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1); }
.range-control { width: 100%; }
.range-display { display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px; }
.range-value { background: #667eea; color: white; padding: 2px 8px; border-radius: 4px; font-size: 0.8rem; }
.radio-group { display: flex; gap: 15px; flex-wrap: wrap; }
.radio-item { display: flex; align-items: center; gap: 5px; }
.radio-item input[type="radio"] { margin: 0; }
.color-input-group { display: flex; gap: 10px; align-items: center; }
.color-picker { width: 50px; height: 40px; border: none; border-radius: 6px; cursor: pointer; }
.preview-section { background: rgba(248, 250, 252, 0.8); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.preview-section h3 { margin: 0 0 20px 0; color: #333; display: flex; align-items: center; justify-content: space-between; }
.preview-container { border: 1px solid #e1e5e9; border-radius: 8px; overflow: hidden; background: white; min-height: 400px; display: flex; align-items: center; justify-content: center; position: relative; }
.preview-placeholder { text-align: center; color: #666; }
.preview-placeholder i { font-size: 3rem; color: #ddd; margin-bottom: 15px; }
#imageCanvas { max-width: 100%; max-height: 500px; object-fit: contain; }
.canvas-container { position: relative; display: inline-block; }
.actions-section { background: rgba(248, 250, 252, 0.8); border-radius: 12px; padding: 20px; }
.btn { padding: 12px 24px; border: none; border-radius: 8px; cursor: pointer; font-weight: 500; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; transition: all 0.3s ease; font-size: 14px; }
.btn-primary { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3); }
.btn-secondary { background: #f8f9fa; color: #495057; border: 1px solid #dee2e6; }
.btn-secondary:hover:not(:disabled) { background: #e9ecef; }
.btn-success { background: linear-gradient(135deg, #48bb78 0%, #38a169 100%); color: white; }
.btn-success:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(72, 187, 120, 0.3); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }
.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }
.member-notice { background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%); color: #2d3436; padding: 20px; border-radius: 12px; margin: 20px; text-align: center; font-weight: 500; }
.member-notice i { margin-right: 10px; }
.upload-area[data-disabled="true"] { opacity: 0.6; cursor: not-allowed; position: relative; }
.upload-area[data-disabled="true"]:hover { border-color: #ddd; background: white; }
.upload-area[data-disabled="true"]::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(255, 255, 255, 0.5); border-radius: 12px; z-index: 1; }
.feedback { position: fixed; bottom: 20px; right: 20px; padding: 15px 20px; border-radius: 8px; color: white; font-weight: 500; z-index: 1000; transform: translateX(100%); transition: transform 0.3s ease; }
.feedback.show { transform: translateX(0); }
.feedback.success { background: linear-gradient(135deg, #48bb78 0%, #38a169 100%); }
.feedback.error { background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%); }
@media (max-width: 1024px) { .main-content { flex-direction: column; } .left-panel, .right-panel { min-width: auto; } }
@media (max-width: 768px) { .main-content { padding: 20px; } .btn-group { justify-content: center; } }