.dpi-converter {
    background: #fff;
    padding: 18px;
    border-radius: 10px;
    max-width: 720px;
    margin: 28px auto;
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
.dpi-converter h2 { color: #0a66c2; margin-bottom: 12px; text-align:center; }
.dpi-controls { display:flex; gap:12px; align-items:center; flex-wrap:wrap; justify-content:center; }
.dpi-controls input[type="file"] { display:inline-block; }
.dpi-actions { margin-top:12px; text-align:center; }
#dpi-progress { width:100%; height:14px; background:#eee; border-radius:8px; overflow:hidden; position:relative; margin-top:12px; display:block; }
#dpi-bar { width:0%; height:100%; background:linear-gradient(90deg,#00c853,#4caf50); transition:width .35s ease; }
#dpi-progress-text { text-align:center; margin-top:6px; font-weight:600; color:#333; }
#dpi-results { margin-top:12px; font-size:14px; }
button.button { cursor:pointer; padding:8px 14px; border-radius:6px; border: none; }
.button-primary { background:#0073aa; color:#fff; }
button:disabled { opacity:.6; cursor:not-allowed; }
a { color:#0073aa; text-decoration:none; }
a:hover { text-decoration:underline; }