First version of Profiler control with right part

src/myfasthtml/assets/core/profiler.css

@@ -162,6 +162,169 @@
     color: color-mix(in oklab, var(--color-base-content) 45%, transparent);
 }
 
+/* ------------------------------------------------------------------
+   Detail panel — right side
+   ------------------------------------------------------------------ */
+.mf-profiler-detail {
+    display: flex;
+    flex-direction: column;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+}
+
+.mf-profiler-detail-header {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 5px 10px;
+    background: var(--color-base-200);
+    border-bottom: 1px solid var(--color-border);
+    flex-shrink: 0;
+}
+
+.mf-profiler-detail-title {
+    flex: 1;
+    font-family: var(--font-sans);
+    font-size: var(--text-sm);
+    font-weight: 500;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.mf-profiler-detail-cmd {
+    font-family: var(--font-sans);
+}
+
+.mf-profiler-detail-duration {
+    font-family: var(--font-mono);
+    font-size: var(--text-xs);
+}
+
+.mf-profiler-view-toggle {
+    display: flex;
+    gap: 2px;
+    flex-shrink: 0;
+}
+
+.mf-profiler-view-btn-active {
+    color: var(--color-primary) !important;
+    background: color-mix(in oklab, var(--color-primary) 12%, transparent) !important;
+}
+
+.mf-profiler-detail-body {
+    flex: 1;
+    overflow-y: auto;
+    padding: 10px;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+/* ------------------------------------------------------------------
+   Span tree — inside a Properties group card
+   ------------------------------------------------------------------ */
+.mf-profiler-span-tree-content {
+    display: flex;
+    flex-direction: column;
+}
+
+.mf-profiler-span-row {
+    display: flex;
+    align-items: center;
+    padding: 4px 10px;
+    border-bottom: 1px solid color-mix(in oklab, var(--color-border) 50%, transparent);
+}
+
+.mf-profiler-span-row:last-child {
+    border-bottom: none;
+}
+
+.mf-profiler-span-row:hover {
+    background: var(--color-base-200);
+}
+
+.mf-profiler-span-indent {
+    flex-shrink: 0;
+    width: 14px;
+    align-self: stretch;
+    border-left: 1px solid color-mix(in oklab, var(--color-border) 60%, transparent);
+}
+
+.mf-profiler-span-body {
+    flex: 1;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding-left: 6px;
+    min-width: 0;
+}
+
+.mf-profiler-span-name {
+    min-width: 120px;
+    font-family: var(--font-sans);
+    font-size: var(--text-xs);
+    white-space: nowrap;
+    flex-shrink: 0;
+}
+
+.mf-profiler-span-name-root {
+    font-weight: 600;
+}
+
+.mf-profiler-span-bar-bg {
+    flex: 1;
+    height: 5px;
+    background: color-mix(in oklab, var(--color-border) 80%, transparent);
+    border-radius: 3px;
+    overflow: hidden;
+    min-width: 0;
+}
+
+.mf-profiler-span-bar {
+    height: 100%;
+    border-radius: 3px;
+    background: var(--color-primary);
+}
+
+.mf-profiler-span-bar.mf-profiler-medium {
+    background: var(--color-warning);
+}
+
+.mf-profiler-span-bar.mf-profiler-slow {
+    background: var(--color-error);
+}
+
+.mf-profiler-span-ms {
+    font-family: var(--font-mono);
+    font-size: var(--text-xs);
+    color: color-mix(in oklab, var(--color-base-content) 55%, transparent);
+    min-width: 60px;
+    text-align: right;
+    flex-shrink: 0;
+}
+
+.mf-profiler-span-ms.mf-profiler-medium {
+    color: var(--color-warning);
+}
+
+.mf-profiler-span-ms.mf-profiler-slow {
+    color: var(--color-error);
+}
+
+.mf-profiler-cumulative-badge {
+    font-family: var(--font-mono);
+    font-size: 10px;
+    padding: 1px 5px;
+    border-radius: 3px;
+    background: color-mix(in oklab, var(--color-primary) 10%, transparent);
+    border: 1px solid color-mix(in oklab, var(--color-primary) 30%, transparent);
+    color: var(--color-primary);
+    flex-shrink: 0;
+    white-space: nowrap;
+}
+
 /* ------------------------------------------------------------------
    Empty state
    ------------------------------------------------------------------ */