OSD: Make custom elements UI more intuitive

src/css/tabs/osd.css

@@ -728,6 +728,194 @@
     vertical-align: top;
 }
 
+/* Custom Element cards */
+.ce-card {
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    margin-bottom: 6px;
+    background: #fff;
+    border-left: 3px solid #ddd;
+}
+
+.ce-card-configured {
+    border-left-color: #37a8db;
+}
+
+.ce-card-collapsed {
+    border-left-color: #ccc;
+}
+
+.ce-card-header {
+    display: flex;
+    align-items: center;
+    padding: 6px 10px;
+    cursor: pointer;
+    gap: 8px;
+    user-select: none;
+}
+
+.ce-card-header:hover {
+    background: #f5f5f5;
+}
+
+.ce-card-header .ios7-switch {
+    flex-shrink: 0;
+}
+
+.ce-card-name {
+    font-weight: bold;
+    font-size: 12px;
+    white-space: nowrap;
+}
+
+.ce-card-preview {
+    color: #888;
+    font-size: 11px;
+    flex: 1;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    text-align: right;
+}
+
+.ce-card-chevron {
+    font-size: 14px;
+    color: #888;
+    flex-shrink: 0;
+    width: 16px;
+    text-align: center;
+}
+
+.ce-card-body {
+    padding: 8px 10px;
+    border-top: 1px solid #eee;
+}
+
+.ce-slot-row {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    margin-bottom: 4px;
+}
+
+.ce-slot-row:last-child {
+    margin-bottom: 0;
+}
+
+.ce-source-select {
+    width: auto !important;
+    flex-shrink: 0;
+}
+
+.ce-format-select {
+    width: auto !important;
+    flex-shrink: 0;
+}
+
+.ce-slot-value {
+    flex: 1;
+    min-width: 0;
+}
+
+.ce-slot-value input,
+.ce-slot-value select {
+    width: 100% !important;
+}
+
+/* Icon picker popup */
+.ce-icon-picker-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 10000;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.ce-icon-picker-popup {
+    background: #fff;
+    border-radius: 6px;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
+    padding: 12px;
+    max-width: 520px;
+    max-height: 80vh;
+    overflow-y: auto;
+}
+
+.ce-icon-picker-title {
+    font-weight: bold;
+    margin-bottom: 8px;
+    font-size: 13px;
+}
+
+.ce-icon-picker-grid {
+    display: grid;
+    grid-template-columns: repeat(16, 1fr);
+    gap: 2px;
+}
+
+.ce-icon-picker-tile {
+    width: 28px;
+    height: 28px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border: 1px solid #ddd;
+    border-radius: 3px;
+    cursor: pointer;
+    background: #fafafa;
+}
+
+.ce-icon-picker-tile:hover {
+    border-color: #37a8db;
+    background: #e8f4fd;
+}
+
+.ce-icon-picker-tile.ce-icon-picker-selected {
+    border-color: #37a8db;
+    background: #d0ecfa;
+    box-shadow: 0 0 0 1px #37a8db;
+}
+
+.ce-icon-picker-tile img {
+    max-width: 20px;
+    max-height: 20px;
+    image-rendering: pixelated;
+}
+
+/* Icon picker inline button */
+.ce-ico-picker-btn {
+    display: inline-flex;
+    align-items: center;
+    gap: 4px;
+    padding: 2px 8px;
+    border: 1px solid silver !important;
+    border-radius: 3px;
+    cursor: pointer;
+    background: #fafafa;
+    min-height: 24px;
+}
+
+.ce-ico-picker-btn:hover {
+    border-color: #37a8db !important;
+    background: #e8f4fd;
+}
+
+.ce-ico-preview {
+    width: 16px;
+    height: 16px;
+    image-rendering: pixelated;
+}
+
+.ce-ico-label {
+    font-size: 11px;
+    color: #666;
+}
+
 .osdCustomElement_main_table {
     width: 100%;
     table-layout: fixed;