modify watermark UI

Author: linzeyan

www/css/tools/tools.css

@@ -2449,6 +2449,84 @@ body.tool-generator .converter-only {
     font-size: 13px;
 }
 
+/* Watermark controls */
+.image-watermark {
+    margin: 12px 0;
+}
+
+.watermark-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+    gap: 16px;
+    margin-top: 12px;
+}
+
+.watermark-grid label {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.watermark-grid label > span {
+    font-size: 12px;
+    font-weight: 600;
+    color: var(--muted);
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+}
+
+.watermark-grid input[type='text'] {
+    border: 1px solid rgb(255 255 255 / 10%);
+    border-radius: 8px;
+    padding: 8px 10px;
+    background: rgb(0 0 0 / 25%);
+    color: var(--fg);
+    font: inherit;
+}
+
+/* Color input with visual indicator */
+.watermark-grid input[type='color'] {
+    height: 40px;
+    border: 2px solid rgb(255 255 255 / 10%);
+    border-radius: 8px;
+    padding: 4px;
+    background: rgb(0 0 0 / 25%);
+    cursor: pointer;
+    transition: var(--transition-smooth);
+}
+
+.watermark-grid input[type='color']:hover {
+    border-color: rgb(255 255 255 / 20%);
+    transform: translateY(-1px);
+}
+
+.watermark-grid input[type='color']:focus {
+    outline: 2px solid var(--accent);
+    border-color: var(--accent);
+}
+
+.watermark-direction {
+    border: 1px solid var(--border);
+    border-radius: 10px;
+    padding: 12px;
+    margin: 0;
+    grid-column: 1 / -1;
+}
+
+.watermark-direction legend {
+    padding: 0 8px;
+    font-size: 12px;
+    font-weight: 600;
+    color: var(--muted);
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+}
+
+.watermark-direction .checkbox.inline {
+    display: inline-flex;
+    margin-right: 16px;
+}
+
 /* QR code generator layout */
 .qr-grid {
     display: grid;