diff --git a/packages/ui/package.json b/packages/ui/package.json
index 7e6c7c00..84b30bd2 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -9,7 +9,13 @@
     "./modal": "./src/components/Modal.tsx",
     "./confirm-dialog": "./src/components/ConfirmDialog.tsx",
     "./badge": "./src/components/Badge.tsx",
-    "./empty-state": "./src/components/EmptyState.tsx"
+    "./empty-state": "./src/components/EmptyState.tsx",
+    "./input": "./src/components/Input.tsx",
+    "./textarea": "./src/components/Textarea.tsx",
+    "./card": "./src/components/Card.tsx",
+    "./label": "./src/components/Label.tsx",
+    "./select": "./src/components/Select.tsx",
+    "./separator": "./src/components/Separator.tsx"
   },
   "peerDependencies": {
     "react": "^18.0.0 || ^19.0.0",
diff --git a/packages/ui/src/components/Card.tsx b/packages/ui/src/components/Card.tsx
new file mode 100644
index 00000000..bf20f525
--- /dev/null
+++ b/packages/ui/src/components/Card.tsx
@@ -0,0 +1,64 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+
+export interface CardProps extends React.HTMLAttributes<HTMLDivElement> {
+  padding?: 'none' | 'sm' | 'md' | 'lg';
+  hover?: boolean;
+}
+
+const paddings: Record<string, string> = {
+  none: '',
+  sm: 'p-3',
+  md: 'p-4',
+  lg: 'p-6',
+};
+
+export function Card({ padding = 'md', hover, className, children, ...props }: CardProps) {
+  return (
+    <div
+      className={clsx(
+        'rounded-xl border',
+        'bg-[var(--bl-surface-card,#1a1a2e)] border-[var(--bl-border,#2a2a4a)]',
+        hover && 'transition-colors hover:border-[var(--bl-accent,#5A8CFF)]/40',
+        paddings[padding],
+        className
+      )}
+      {...props}
+    >
+      {children}
+    </div>
+  );
+}
+
+export interface CardHeaderProps extends React.HTMLAttributes<HTMLDivElement> {}
+
+export function CardHeader({ className, children, ...props }: CardHeaderProps) {
+  return (
+    <div className={clsx('mb-3', className)} {...props}>
+      {children}
+    </div>
+  );
+}
+
+export type CardTitleProps = React.ComponentPropsWithoutRef<'h3'>;
+
+export function CardTitle({ className, children, ...props }: CardTitleProps) {
+  return (
+    <h3
+      className={clsx('text-lg font-semibold text-[var(--bl-text-primary,#fff)]', className)}
+      {...props}
+    >
+      {children}
+    </h3>
+  );
+}
+
+export type CardDescriptionProps = React.ComponentPropsWithoutRef<'p'>;
+
+export function CardDescription({ className, children, ...props }: CardDescriptionProps) {
+  return (
+    <p className={clsx('text-sm text-[var(--bl-text-secondary,#a0a0b0)]', className)} {...props}>
+      {children}
+    </p>
+  );
+}
diff --git a/packages/ui/src/components/Input.tsx b/packages/ui/src/components/Input.tsx
new file mode 100644
index 00000000..a2d80615
--- /dev/null
+++ b/packages/ui/src/components/Input.tsx
@@ -0,0 +1,54 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+
+export interface InputProps extends React.InputHTMLAttributes<HTMLInputElement> {
+  label?: string;
+  error?: string;
+  hint?: string;
+}
+
+export const Input = React.forwardRef<HTMLInputElement, InputProps>(
+  ({ label, error, hint, className, id, ...props }, ref) => {
+    const inputId = id ?? (label ? `input-${label.toLowerCase().replace(/\s+/g, '-')}` : undefined);
+
+    return (
+      <div className="space-y-1">
+        {label && (
+          <label
+            htmlFor={inputId}
+            className="block text-sm font-medium text-[var(--bl-text-secondary,#a0a0b0)]"
+          >
+            {label}
+          </label>
+        )}
+        <input
+          ref={ref}
+          id={inputId}
+          className={clsx(
+            'w-full rounded-md border px-3 py-2 text-sm outline-none transition-colors',
+            'bg-[var(--bl-surface-card,#1a1a2e)] text-[var(--bl-text-primary,#fff)]',
+            'placeholder:text-[var(--bl-text-tertiary,#555)]',
+            'focus:ring-2 focus:ring-[var(--bl-accent,#5A8CFF)] focus:ring-offset-0',
+            error ? 'border-red-500' : 'border-[var(--bl-border,#2a2a4a)]',
+            className
+          )}
+          aria-invalid={error ? 'true' : undefined}
+          aria-describedby={error ? `${inputId}-error` : hint ? `${inputId}-hint` : undefined}
+          {...props}
+        />
+        {error && (
+          <p id={`${inputId}-error`} className="text-xs text-red-400" role="alert">
+            {error}
+          </p>
+        )}
+        {hint && !error && (
+          <p id={`${inputId}-hint`} className="text-xs text-[var(--bl-text-tertiary,#555)]">
+            {hint}
+          </p>
+        )}
+      </div>
+    );
+  }
+);
+
+Input.displayName = 'Input';
diff --git a/packages/ui/src/components/Label.tsx b/packages/ui/src/components/Label.tsx
new file mode 100644
index 00000000..08f1aac4
--- /dev/null
+++ b/packages/ui/src/components/Label.tsx
@@ -0,0 +1,25 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+
+export interface LabelProps extends React.LabelHTMLAttributes<HTMLLabelElement> {
+  required?: boolean;
+}
+
+export function Label({ required, className, children, ...props }: LabelProps) {
+  return (
+    <label
+      className={clsx(
+        'block text-sm font-medium text-[var(--bl-text-secondary,#a0a0b0)]',
+        className
+      )}
+      {...props}
+    >
+      {children}
+      {required && (
+        <span className="ml-0.5 text-red-400" aria-hidden="true">
+          *
+        </span>
+      )}
+    </label>
+  );
+}
diff --git a/packages/ui/src/components/Select.tsx b/packages/ui/src/components/Select.tsx
new file mode 100644
index 00000000..4f0124e6
--- /dev/null
+++ b/packages/ui/src/components/Select.tsx
@@ -0,0 +1,67 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+import { ChevronDown } from 'lucide-react';
+
+export interface SelectProps extends React.SelectHTMLAttributes<HTMLSelectElement> {
+  label?: string;
+  error?: string;
+  options: Array<{ value: string; label: string; disabled?: boolean }>;
+  placeholder?: string;
+}
+
+export const Select = React.forwardRef<HTMLSelectElement, SelectProps>(
+  ({ label, error, options, placeholder, className, id, ...props }, ref) => {
+    const selectId =
+      id ?? (label ? `select-${label.toLowerCase().replace(/\s+/g, '-')}` : undefined);
+
+    return (
+      <div className="space-y-1">
+        {label && (
+          <label
+            htmlFor={selectId}
+            className="block text-sm font-medium text-[var(--bl-text-secondary,#a0a0b0)]"
+          >
+            {label}
+          </label>
+        )}
+        <div className="relative">
+          <select
+            ref={ref}
+            id={selectId}
+            className={clsx(
+              'w-full appearance-none rounded-md border px-3 py-2 pr-8 text-sm outline-none transition-colors',
+              'bg-[var(--bl-surface-card,#1a1a2e)] text-[var(--bl-text-primary,#fff)]',
+              'focus:ring-2 focus:ring-[var(--bl-accent,#5A8CFF)] focus:ring-offset-0',
+              error ? 'border-red-500' : 'border-[var(--bl-border,#2a2a4a)]',
+              className
+            )}
+            aria-invalid={error ? 'true' : undefined}
+            {...props}
+          >
+            {placeholder && (
+              <option value="" disabled>
+                {placeholder}
+              </option>
+            )}
+            {options.map(opt => (
+              <option key={opt.value} value={opt.value} disabled={opt.disabled}>
+                {opt.label}
+              </option>
+            ))}
+          </select>
+          <ChevronDown
+            className="pointer-events-none absolute right-2 top-1/2 h-4 w-4 -translate-y-1/2 text-[var(--bl-text-tertiary,#555)]"
+            aria-hidden="true"
+          />
+        </div>
+        {error && (
+          <p className="text-xs text-red-400" role="alert">
+            {error}
+          </p>
+        )}
+      </div>
+    );
+  }
+);
+
+Select.displayName = 'Select';
diff --git a/packages/ui/src/components/Separator.tsx b/packages/ui/src/components/Separator.tsx
new file mode 100644
index 00000000..06ab92fb
--- /dev/null
+++ b/packages/ui/src/components/Separator.tsx
@@ -0,0 +1,28 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+
+export interface SeparatorProps extends React.ComponentPropsWithoutRef<'hr'> {
+  orientation?: 'horizontal' | 'vertical';
+}
+
+export function Separator({ orientation = 'horizontal', className, ...props }: SeparatorProps) {
+  if (orientation === 'vertical') {
+    return (
+      <div
+        role="separator"
+        aria-orientation="vertical"
+        className={clsx('h-full w-px bg-[var(--bl-border,#2a2a4a)]', className)}
+        {...(props as React.HTMLAttributes<HTMLDivElement>)}
+      />
+    );
+  }
+
+  return (
+    <hr
+      role="separator"
+      aria-orientation="horizontal"
+      className={clsx('border-t border-[var(--bl-border,#2a2a4a)]', className)}
+      {...props}
+    />
+  );
+}
diff --git a/packages/ui/src/components/Textarea.tsx b/packages/ui/src/components/Textarea.tsx
new file mode 100644
index 00000000..da0d198c
--- /dev/null
+++ b/packages/ui/src/components/Textarea.tsx
@@ -0,0 +1,55 @@
+import * as React from 'react';
+import { clsx } from 'clsx';
+
+export interface TextareaProps extends React.TextareaHTMLAttributes<HTMLTextAreaElement> {
+  label?: string;
+  error?: string;
+  hint?: string;
+}
+
+export const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
+  ({ label, error, hint, className, id, ...props }, ref) => {
+    const textareaId =
+      id ?? (label ? `textarea-${label.toLowerCase().replace(/\s+/g, '-')}` : undefined);
+
+    return (
+      <div className="space-y-1">
+        {label && (
+          <label
+            htmlFor={textareaId}
+            className="block text-sm font-medium text-[var(--bl-text-secondary,#a0a0b0)]"
+          >
+            {label}
+          </label>
+        )}
+        <textarea
+          ref={ref}
+          id={textareaId}
+          className={clsx(
+            'w-full rounded-md border px-3 py-2 text-sm outline-none transition-colors resize-y',
+            'bg-[var(--bl-surface-card,#1a1a2e)] text-[var(--bl-text-primary,#fff)]',
+            'placeholder:text-[var(--bl-text-tertiary,#555)]',
+            'focus:ring-2 focus:ring-[var(--bl-accent,#5A8CFF)] focus:ring-offset-0',
+            error ? 'border-red-500' : 'border-[var(--bl-border,#2a2a4a)]',
+            className
+          )}
+          aria-invalid={error ? 'true' : undefined}
+          aria-describedby={error ? `${textareaId}-error` : hint ? `${textareaId}-hint` : undefined}
+          {...props}
+        />
+        {error && (
+          <p id={`${textareaId}-error`} className="text-xs text-red-400" role="alert">
+            {error}
+          </p>
+        )}
+        {hint && !error && (
+          <p id={`${textareaId}-hint`} className="text-xs text-[var(--bl-text-tertiary,#555)]">
+            {hint}
+          </p>
+        )}
+      </div>
+    );
+  }
+);
+
+Textarea.displayName = 'Textarea';
diff --git a/packages/ui/src/index.ts b/packages/ui/src/index.ts
index 0efcf9b4..ebb731cd 100644
--- a/packages/ui/src/index.ts
+++ b/packages/ui/src/index.ts
@@ -11,3 +11,9 @@ export { Modal, type ModalProps } from './components/Modal.js';
 export { ConfirmDialog, type ConfirmDialogProps } from './components/ConfirmDialog.js';
 export { Badge, type BadgeProps } from './components/Badge.js';
 export { EmptyState, type EmptyStateProps } from './components/EmptyState.js';
+export { Input, type InputProps } from './components/Input.js';
+export { Textarea, type TextareaProps } from './components/Textarea.js';
+export { Card, CardHeader, CardTitle, CardDescription, type CardProps } from './components/Card.js';
+export { Label, type LabelProps } from './components/Label.js';
+export { Select, type SelectProps } from './components/Select.js';
+export { Separator, type SeparatorProps } from './components/Separator.js';