diff --git a/ui/src/components/features/AgentWorkbench.tsx b/ui/src/components/features/AgentWorkbench.tsx
index cbf7b02..e6fe719 100644
--- a/ui/src/components/features/AgentWorkbench.tsx
+++ b/ui/src/components/features/AgentWorkbench.tsx
@@ -34,7 +34,7 @@ export function AgentWorkbench({ agent, lines, busy, onSendPrompt, compact }: Pr
   }, [lines, busy])
 
   return (
-    <div className="flex h-full min-h-0 flex-col">
+    <div className="flex h-full min-h-0 flex-col overflow-hidden">
       <header className={cn('flex shrink-0 items-center gap-2 border-b border-border/60 px-2', compact ? 'py-1' : 'py-3')}>
         <span
           className={cn('flex shrink-0 items-center justify-center rounded-lg border border-border/80 bg-surface-overlay', compact ? 'h-7 w-7' : 'h-10 w-10')}
diff --git a/ui/src/components/features/CommandBar.tsx b/ui/src/components/features/CommandBar.tsx
index 6a07e09..5d9ba6c 100644
--- a/ui/src/components/features/CommandBar.tsx
+++ b/ui/src/components/features/CommandBar.tsx
@@ -34,7 +34,7 @@ export function CommandBar({ busy, selectedAgent, onSubmit }: Props) {
           onChange={(e) => setInput(e.target.value)}
           placeholder={selectedAgent ? `Command ${selectedAgent.name.split(' ·')[0]}…` : 'Enter command — auto-routed to specialist…'}
           disabled={busy}
-          className="flex-1"
+          className="flex-1 bg-surface text-foreground placeholder:text-foreground-faint dark:bg-[#0d1520] dark:text-slate-100 dark:placeholder:text-slate-500"
         />
         <Button type="submit" disabled={busy || !input.trim()}>
           <Send className="h-3.5 w-3.5" />
diff --git a/ui/src/components/features/CommsPanel.tsx b/ui/src/components/features/CommsPanel.tsx
index 1d3e4ff..a759a5e 100644
--- a/ui/src/components/features/CommsPanel.tsx
+++ b/ui/src/components/features/CommsPanel.tsx
@@ -45,8 +45,8 @@ export function CommsPanel({ messages, agents, selectedAgent, busy }: Props) {
           const agMeta = ag ? getAgentMeta(ag.id) : null
           return (
             <div key={i} className={cn('flex gap-2', m.role === 'user' && 'flex-row-reverse')}>
-              <div className={cn('max-w-[85%] rounded-lg border px-2 py-1.5', m.role === 'user' ? 'border-docker/25 bg-docker-light' : 'border-border bg-surface-overlay')}>
-                <p className="mb-0.5 text-[8px] text-foreground-muted">
+              <div className={cn('max-w-[85%] rounded-lg border px-2 py-1.5', m.role === 'user' ? 'border-docker/40 bg-docker/15 dark:border-blue-400/35 dark:bg-[#0f2744]' : 'border-border bg-surface-overlay')}>
+                <p className={cn('mb-0.5 text-[8px]', m.role === 'user' ? 'text-docker dark:text-blue-300' : 'text-foreground-muted')}>
                   {m.role === 'user' ? 'You' : ag?.name || m.agent}
                   {m.ts && ` · ${new Date(m.ts).toLocaleTimeString('en-US', { hour12: false })}`}
                 </p>
diff --git a/ui/src/components/features/SqlWorkbench.tsx b/ui/src/components/features/SqlWorkbench.tsx
index 606d96a..4960ad1 100644
--- a/ui/src/components/features/SqlWorkbench.tsx
+++ b/ui/src/components/features/SqlWorkbench.tsx
@@ -144,10 +144,10 @@ export function SqlWorkbench({ engine, compact }: Props) {
         </div>
       </header>
 
-      <div className="flex min-h-0 flex-1">
-        <aside className={cn('shrink-0 border-r border-border/60 p-1.5', compact ? 'w-44' : 'w-52')}>
+      <div className="flex min-h-0 flex-1 overflow-hidden">
+        <aside className={cn('flex min-h-0 shrink-0 flex-col border-r border-border/60 p-1.5', compact ? 'w-44' : 'w-52')}>
           <p className="mb-0.5 text-[8px] font-semibold uppercase tracking-wider text-foreground-faint">10 demo commands</p>
-          <div className="scrollbar-thin max-h-full space-y-0.5 overflow-y-auto">
+          <div className="scrollbar-thin min-h-0 flex-1 space-y-0.5 overflow-y-auto">
             {samples.map((s) => (
               <button
                 key={s.id}
@@ -166,8 +166,8 @@ export function SqlWorkbench({ engine, compact }: Props) {
             value={sql}
             onChange={(e) => setSql(e.target.value)}
             className={cn(
-              'shrink-0 resize-none border-b border-border/60 bg-black/40 p-1.5 font-mono text-[10px] text-emerald-100 outline-none focus:ring-1 focus:ring-docker/40',
-              compact ? 'min-h-[40px]' : 'min-h-[56px]',
+              'shrink-0 resize-y border-b border-border/60 bg-[#0d1117] p-1.5 font-mono text-[10px] text-emerald-100 outline-none focus:ring-1 focus:ring-docker/40',
+              compact ? 'min-h-[48px] max-h-[96px]' : 'min-h-[56px] max-h-[120px]',
             )}
             spellCheck={false}
             placeholder={`${meta.queryLabel}…`}
diff --git a/ui/src/components/features/WorkbenchPanel.tsx b/ui/src/components/features/WorkbenchPanel.tsx
index eb4e22d..f5f0bde 100644
--- a/ui/src/components/features/WorkbenchPanel.tsx
+++ b/ui/src/components/features/WorkbenchPanel.tsx
@@ -1,3 +1,5 @@
+import { useEffect, useRef, useState } from 'react'
+import { GripHorizontal } from 'lucide-react'
 import type { Agent, TerminalLine } from '../../types'
 import { AgentWorkbench } from './AgentWorkbench'
 import { SqlWorkbench } from './SqlWorkbench'
@@ -10,18 +12,63 @@ type Props = {
   onSendPrompt: (message: string, agentId?: string) => void
 }
 
+const MIN_H = 200
+const DEFAULT_H = 300
+const MAX_VH = 58
+
 export function WorkbenchPanel({ mode, agent, lines, busy, onSendPrompt }: Props) {
+  const [height, setHeight] = useState(DEFAULT_H)
+  const dragging = useRef(false)
+  const startY = useRef(0)
+  const startH = useRef(0)
+
+  useEffect(() => {
+    const onMove = (e: MouseEvent) => {
+      if (!dragging.current) return
+      const maxH = window.innerHeight * (MAX_VH / 100)
+      const next = startH.current + (startY.current - e.clientY)
+      setHeight(Math.max(MIN_H, Math.min(maxH, next)))
+    }
+    const onUp = () => { dragging.current = false }
+    window.addEventListener('mousemove', onMove)
+    window.addEventListener('mouseup', onUp)
+    return () => {
+      window.removeEventListener('mousemove', onMove)
+      window.removeEventListener('mouseup', onUp)
+    }
+  }, [])
+
   if (!mode) return null
 
   return (
-    <section className="flex h-[190px] max-h-[26vh] shrink-0 flex-col border-t border-docker/25 bg-[#0a0e14] shadow-[0_-4px_20px_rgba(0,0,0,0.25)]">
-      {mode === 'agent' && agent && (
-        <AgentWorkbench agent={agent} lines={lines} busy={busy} onSendPrompt={onSendPrompt} compact />
-      )}
-      {mode === 'sql-postgres' && <SqlWorkbench engine="postgres" compact />}
-      {mode === 'sql-mysql' && <SqlWorkbench engine="mysql" compact />}
-      {mode === 'sql-mongodb' && <SqlWorkbench engine="mongodb" compact />}
-      {mode === 'sql-trino' && <SqlWorkbench engine="trino" compact />}
+    <section
+      style={{ height }}
+      className="flex shrink-0 flex-col overflow-hidden border-t border-docker/25 bg-[#0a0e14] shadow-[0_-4px_20px_rgba(0,0,0,0.25)]"
+    >
+      <div
+        role="separator"
+        aria-label="Resize workbench"
+        onMouseDown={(e) => {
+          dragging.current = true
+          startY.current = e.clientY
+          startH.current = height
+          e.preventDefault()
+        }}
+        className="flex h-2.5 shrink-0 cursor-ns-resize items-center justify-center border-b border-border/50 bg-surface-overlay/60 hover:bg-docker/10"
+        title="Sleep omhoog/omlaag om grootte aan te passen"
+      >
+        <GripHorizontal className="h-3 w-3 text-foreground-faint" />
+      </div>
+
+      <div className="min-h-0 flex-1 overflow-hidden">
+        {mode === 'agent' && agent && (
+          <AgentWorkbench agent={agent} lines={lines} busy={busy} onSendPrompt={onSendPrompt} compact />
+        )}
+        {mode === 'sql-postgres' && <SqlWorkbench engine="postgres" compact />}
+        {mode === 'sql-mysql' && <SqlWorkbench engine="mysql" compact />}
+        {mode === 'sql-mongodb' && <SqlWorkbench engine="mongodb" compact />}
+        {mode === 'sql-trino' && <SqlWorkbench engine="trino" compact />}
+      </div>
     </section>
   )
 }
diff --git a/ui/src/components/ui/Input.tsx b/ui/src/components/ui/Input.tsx
index f3a46e7..cfa4de4 100644
--- a/ui/src/components/ui/Input.tsx
+++ b/ui/src/components/ui/Input.tsx
@@ -7,7 +7,7 @@ export function Input({ className, ...props }: Props) {
   return (
     <input
       className={cn(
-        'h-8 w-full rounded-md border border-border bg-surface px-2.5 text-sm text-foreground placeholder:text-foreground-faint focus:border-docker/50 focus:outline-none focus:ring-1 focus:ring-docker/30',
+        'h-8 w-full rounded-md border border-border bg-surface px-2.5 text-sm text-foreground placeholder:text-foreground-faint focus:border-docker/50 focus:outline-none focus:ring-1 focus:ring-docker/30 dark:bg-[#0d1520] dark:text-slate-100 dark:placeholder:text-slate-500',
         className,
       )}
       {...props}