body {
    position: relative;
    background: #f4f6f8;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("/logo.png");
    background-size: 100px 100px;
    background-repeat: repeat;
    opacity: 0.05;
    pointer-events: none;
    z-index: 0;
}

body > * {
    position: relative;
    z-index: 1;
}

.dropzone {
    border: 2px dashed #b9c2d0;
    border-radius: 12px;
    padding: 48px;
    background: #f2f3f7;
    text-align: center;
    transition: border-color 0.2s, background-color 0.2s;
}

.dropzone.dragover {
    border-color: #6c63ff;
    background: #eef0ff;
}

.btn-primary {
    background: #6c63ff;
    border: none;
    box-shadow: 0 8px 18px rgba(108, 99, 255, 0.25);
}

.btn-primary:hover {
    background: #5a52f1;
}

.file-item {
    border: 1px solid #edf0f4;
    border-radius: 12px;
    padding: 16px;
    background: #fff;
}

.muted {
    color: #6b7280;
}