.header {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    padding: 25px 0;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.drop-zone {
    border: 3px dashed #6c757d;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    background-color: #f8f9fa;
    transition: all 0.3s;
    cursor: pointer;
    min-height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.drop-zone:hover, .drop-zone.dragover {
    background-color: #e9ecef;
    border-color: #007bff;
}
.drop-zone i {
    font-size: 48px;
    color: #6c757d;
    margin-bottom: 15px;
}
.preview-container {
    display: none;
    margin-top: 20px;
    position: relative;
}
#previewImage {
    max-width: 100%;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.watermark-preview {
    position: absolute;
    pointer-events: none;
    user-select: none;
}
.control-panel {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 0 15px rgba(0,0,0,0.08);
}
.btn-download {
    margin-top: 20px;
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    border: none;
    padding: 12px;
    font-weight: 600;
    transition: all 0.3s;
}
.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}
.color-preview {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    display: inline-block;
    margin-left: 10px;
    vertical-align: middle;
    border: 1px solid #ddd;
}
.section-title {
    border-left: 4px solid #6a11cb;
    padding-left: 12px;
    margin-bottom: 10px;
    font-weight: 600;
    color: #444;
}
.tile-preview {
    display: inline-block;
    padding: 4px 8px;
    background-color: #f0f0f0;
    border-radius: 4px;
    margin-left: 10px;
    font-size: 14px;
}
.feature-icon {
    color: #6a11cb;
    margin-right: 8px;
}
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #6c757d;
    font-size: 0.9rem;
}
.angle-control {
    display: flex;
    align-items: center;
}
.angle-value {
    min-width: 50px;
    text-align: center;
    margin-left: 15px;
    font-weight: 600;
}
.rotation-icon {
    font-size: 24px;
    margin-right: 10px;
    color: #6a11cb;
}
.tooltip-info {
    color: #6c757d;
    font-size: 0.85rem;
    margin-top: 5px;
}