WARDROBE / SYSTEM / INSTALL

INSTALL SYSTEM
IN 30 SECONDS_

Pick your AI. Hit copy. Paste it into a fresh chat in your project. Watch the theme arrive.

Install the Wardrobe System theme in my project. I'm using Claude Code / Cursor. Apply every step below as written.

Step 1 — Add this to globals.css:

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=Space+Grotesk:wght@300;400;500;600&display=swap");

/* =========================================================
   Wardrobe — SYSTEM tokens
   Scoped via :where() for low specificity.
   Activate by adding data-system="system" to a body or wrapper.
   ========================================================= */

:where([data-system="system"]) {
    /* Surface */
    --color-bg: #F4F4F4;
    --color-card: #FFFFFF;
    --color-fg: #0D0D0D;
    --color-fg-muted: #888888;
    --color-fg-faint: #BBBBBB;
    --color-fg-ghost: #EEEEEE;
    --color-divider: #F0F0F0;

    /* Accents */
    --color-accent: #6CEFA0;
    --color-accent-blue: #6CDDEF;
    --color-accent-purple: #B06CEF;
    --color-accent-orange: #EF9B6C;
    --color-success: #6CEFA0;
    --color-fail: #FF6B6B;

    /* Dark inversions (analysis panels in light dashboards) */
    --color-dark-bg: #1A1A1A;
    --color-dark-fg: #DDDDDD;
    --color-dark-muted: #888888;

    /* Borders */
    --border: 1px solid rgba(0, 0, 0, 0.05);
    --border-strong: 1px solid #EEEEEE;
    --border-color: rgba(0, 0, 0, 0.05);

    /* Radius — sharp! 2px MAX. Never pill. */
    --radius-sm: 1px;
    --radius-md: 2px;
    --radius-lg: 2px;
    --radius-full: 9999px;

    /* Typography */
    --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Type scale */
    --text-micro: 10px;
    --text-xs: 11px;
    --text-sm: 12px;
    --text-base: 13px;
    --text-md: 14px;
    --text-lg: 16px;
    --text-xl: 18px;
    --text-2xl: 24px;
    --text-3xl: 32px;
    --text-4xl: 42px;
    --text-5xl: 48px;
    --text-6xl: 64px;

    --display-letter-spacing: -2px;
    --display-line-height: 1;
    --label-letter-spacing: 1.5px;
    --button-letter-spacing: 1px;

    /* Weights */
    --weight-light: 300;
    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Shadow — soft only. Borders are nearly invisible. */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-flat: 0 1px 2px rgba(0, 0, 0, 0.03);

    /* Motion */
    --duration-fast: 100ms;
    --duration-base: 200ms;
    --easing: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-system="system"] {
    background: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


Step 2 — Create components/ui/wardrobe/cn.ts:

export function cn(...classes: Array<string | false | null | undefined>): string {
    return classes.filter(Boolean).join(" ");
}


Step 3 — Create the following 10 component files in components/ui/wardrobe/:

--- components/ui/wardrobe/Button.tsx ---

import * as React from "react";
import { cn } from "./cn";

type ButtonProps = {
    variant?: "primary" | "secondary" | "destructive" | "mint";
    size?: "sm" | "md" | "lg";
    children: React.ReactNode;
} & React.ButtonHTMLAttributes<HTMLButtonElement>;

export function Button({
    variant = "primary",
    size = "md",
    className,
    children,
    ...props
}: ButtonProps) {
    return (
        <button
            className={cn("sys-btn", `sys-btn--${variant}`, `sys-btn--${size}`, className)}
            {...props}
        >
            {children}
        </button>
    );
}


--- components/ui/wardrobe/Input.tsx ---

import * as React from "react";
import { cn } from "./cn";

type InputProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
    display?: boolean;
} & Omit<React.InputHTMLAttributes<HTMLInputElement>, "size">;

export function Input({
    size = "md",
    variant = "default",
    label,
    hint,
    display,
    className,
    id,
    ...props
}: InputProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <input
                id={inputId}
                className={cn(
                    "sys-input",
                    `sys-input--${size}`,
                    variant === "error" && "sys-input--error",
                    display && "sys-input--display",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Textarea.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TextareaProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
} & Omit<React.TextareaHTMLAttributes<HTMLTextAreaElement>, "size">;

export function Textarea({
    size = "md",
    variant = "default",
    label,
    hint,
    className,
    id,
    ...props
}: TextareaProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <textarea
                id={inputId}
                className={cn(
                    "sys-textarea",
                    `sys-input--${size}`,
                    variant === "error" && "sys-textarea--error",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Select.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SelectProps = {
    options: Array<{ value: string; label: string }>;
    value: string;
    onValueChange: (value: string) => void;
    placeholder?: string;
    label?: string;
} & Omit<
    React.SelectHTMLAttributes<HTMLSelectElement>,
    "value" | "onChange" | "size"
>;

export function Select({
    options,
    value,
    onValueChange,
    placeholder,
    label,
    className,
    id,
    ...props
}: SelectProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <select
                id={inputId}
                value={value}
                onChange={(e) => onValueChange(e.target.value)}
                className={cn("sys-select", className)}
                {...props}
            >
                {placeholder && (
                    <option value="" disabled>
                        {placeholder}
                    </option>
                )}
                {options.map((opt) => (
                    <option key={opt.value} value={opt.value}>
                        {opt.label}
                    </option>
                ))}
            </select>
        </label>
    );
}


--- components/ui/wardrobe/Card.tsx ---

import * as React from "react";
import { cn } from "./cn";

type CardProps = {
    variant?: "default" | "dark" | "accent";
    size?: "default" | "lg";
    codeTexture?: string;
    children: React.ReactNode;
} & React.HTMLAttributes<HTMLDivElement>;

export function Card({
    variant = "default",
    size = "default",
    codeTexture,
    className,
    children,
    ...props
}: CardProps) {
    return (
        <div
            className={cn(
                "sys-card",
                variant !== "default" && `sys-card--${variant}`,
                size !== "default" && `sys-card--${size}`,
                className,
            )}
            {...props}
        >
            {codeTexture && (
                <span className="sys-card__code-texture">{codeTexture}</span>
            )}
            {children}
        </div>
    );
}


--- components/ui/wardrobe/Badge.tsx ---

import * as React from "react";
import { cn } from "./cn";

type BadgeProps = {
    variant?: "default" | "filled";
    children: React.ReactNode;
    className?: string;
};

export function Badge({ variant = "default", children, className }: BadgeProps) {
    return (
        <span
            className={cn(
                "sys-badge",
                variant === "filled" && "sys-badge--filled",
                className,
            )}
        >
            {children}
        </span>
    );
}


--- components/ui/wardrobe/Dialog.tsx ---

import * as React from "react";

type DialogProps = {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    title: string;
    children: React.ReactNode;
};

export function Dialog({ open, onOpenChange, title, children }: DialogProps) {
    const dialogRef = React.useRef<HTMLDivElement>(null);
    const previousFocus = React.useRef<HTMLElement | null>(null);

    React.useEffect(() => {
        if (!open) return;

        previousFocus.current = document.activeElement as HTMLElement;
        const focusable = dialogRef.current?.querySelectorAll<HTMLElement>(
            'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])',
        );
        focusable?.[0]?.focus();

        function onKey(e: KeyboardEvent) {
            if (e.key === "Escape") {
                e.preventDefault();
                onOpenChange(false);
                return;
            }
            if (e.key !== "Tab" || !focusable || focusable.length === 0) return;
            const first = focusable[0];
            const last = focusable[focusable.length - 1];
            if (e.shiftKey && document.activeElement === first) {
                e.preventDefault();
                last.focus();
            } else if (!e.shiftKey && document.activeElement === last) {
                e.preventDefault();
                first.focus();
            }
        }

        document.addEventListener("keydown", onKey);
        const prevOverflow = document.body.style.overflow;
        document.body.style.overflow = "hidden";
        return () => {
            document.removeEventListener("keydown", onKey);
            document.body.style.overflow = prevOverflow;
            previousFocus.current?.focus();
        };
    }, [open, onOpenChange]);

    if (!open) return null;

    return (
        <div
            className="sys-dialog-backdrop"
            onClick={(e) => {
                if (e.target === e.currentTarget) onOpenChange(false);
            }}
        >
            <div
                ref={dialogRef}
                className="sys-dialog"
                role="dialog"
                aria-modal="true"
                aria-labelledby="sys-dialog-title"
            >
                <button
                    type="button"
                    className="sys-dialog__close"
                    onClick={() => onOpenChange(false)}
                    aria-label="Close"
                >
                    ×
                </button>
                <h2 id="sys-dialog-title" className="sys-dialog__title">
                    {title}
                </h2>
                {children}
            </div>
        </div>
    );
}


--- components/ui/wardrobe/Tabs.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TabsProps = {
    tabs: Array<{ id: string; label: string }>;
    activeId: string;
    onTabChange: (id: string) => void;
    className?: string;
};

export function Tabs({ tabs, activeId, onTabChange, className }: TabsProps) {
    return (
        <div role="tablist" className={cn("sys-tabs", className)}>
            {tabs.map((tab) => (
                <button
                    key={tab.id}
                    role="tab"
                    aria-selected={tab.id === activeId}
                    type="button"
                    className={cn(
                        "sys-tabs__btn",
                        tab.id === activeId && "sys-tabs__btn--active",
                    )}
                    onClick={() => onTabChange(tab.id)}
                    onKeyDown={(e) => {
                        if (e.key !== "ArrowRight" && e.key !== "ArrowLeft") return;
                        e.preventDefault();
                        const idx = tabs.findIndex((t) => t.id === activeId);
                        const next =
                            e.key === "ArrowRight"
                                ? (idx + 1) % tabs.length
                                : (idx - 1 + tabs.length) % tabs.length;
                        onTabChange(tabs[next].id);
                    }}
                >
                    {tab.label}
                </button>
            ))}
        </div>
    );
}


--- components/ui/wardrobe/Switch.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SwitchProps = {
    checked: boolean;
    onCheckedChange: (checked: boolean) => void;
    label?: string;
    id?: string;
    terminal?: boolean;
};

export function Switch({
    checked,
    onCheckedChange,
    label,
    id,
    terminal,
}: SwitchProps) {
    const inputId = id ?? React.useId();
    return (
        <label
            className={cn("sys-switch", terminal && "sys-switch--terminal")}
            htmlFor={inputId}
        >
            <input
                id={inputId}
                type="checkbox"
                role="switch"
                checked={checked}
                onChange={(e) => onCheckedChange(e.target.checked)}
                className="sys-switch__input"
            />
            {terminal ? (
                <>
                    <span className="sys-switch__bracket">
                        {checked ? "[X]" : "[ ]"}
                    </span>
                    {label && <span>{label}</span>}
                </>
            ) : (
                <>
                    <span className="sys-switch__box">
                        <svg
                            className="sys-switch__check"
                            viewBox="0 0 12 12"
                            fill="none"
                            stroke="currentColor"
                            strokeWidth="2"
                            aria-hidden="true"
                        >
                            <polyline points="2 6 5 9 10 3" />
                        </svg>
                    </span>
                    {label && <span>{label}</span>}
                </>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Toast.tsx ---

import * as React from "react";
import { cn } from "./cn";

export type ToastVariant = "default" | "success" | "error";

export type ToastProps = {
    title: string;
    description?: string;
    variant?: ToastVariant;
};

type ToastEntry = ToastProps & { id: number; time: string };

type ToastContextValue = {
    show: (toast: ToastProps) => void;
};

const ToastContext = React.createContext<ToastContextValue | null>(null);

export function useToast() {
    const ctx = React.useContext(ToastContext);
    if (!ctx) throw new Error("useToast must be used within <ToastProvider>");
    return ctx;
}

function timestamp(): string {
    const d = new Date();
    const pad = (n: number) => String(n).padStart(2, "0");
    const ms = String(Math.floor(d.getMilliseconds() / 10)).padStart(2, "0");
    return `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}.${ms}`;
}

export function ToastProvider({ children }: { children: React.ReactNode }) {
    const [toasts, setToasts] = React.useState<ToastEntry[]>([]);
    const idRef = React.useRef(0);

    const show = React.useCallback((toast: ToastProps) => {
        const id = ++idRef.current;
        setToasts((prev) => [...prev, { ...toast, id, time: timestamp() }]);
        window.setTimeout(() => {
            setToasts((prev) => prev.filter((t) => t.id !== id));
        }, 4000);
    }, []);

    return (
        <ToastContext.Provider value={{ show }}>
            {children}
            <div
                className="sys-toast-region"
                role="region"
                aria-label="Notifications"
                aria-live="polite"
            >
                {toasts.map((t) => (
                    <Toast key={t.id} {...t} />
                ))}
            </div>
        </ToastContext.Provider>
    );
}

type ToastViewProps = ToastProps & { time?: string };

export function Toast({
    title,
    description,
    variant = "default",
    time,
}: ToastViewProps) {
    return (
        <div
            className={cn(
                "sys-toast",
                variant === "success" && "sys-toast--success",
                variant === "error" && "sys-toast--error",
                variant === "default" && "sys-toast--default",
            )}
            role="status"
        >
            <span className="sys-toast__title">{title}</span>
            {time && <span className="sys-toast__time">{time}</span>}
            {description && (
                <span className="sys-toast__desc">{description}</span>
            )}
        </div>
    );
}


Step 4 — Add globals.css component styles. Append the following to globals.css below the tokens:

/* =========================================================
   Wardrobe — SYSTEM globals
   Loads display + mono fonts and base component styles.
   Only active on elements with data-system="system".
   ========================================================= */



[data-system="system"] *,
[data-system="system"] *::before,
[data-system="system"] *::after {
    box-sizing: border-box;
}

[data-system="system"] {
    min-height: 100vh;
}

/* ----- LABEL MICRO — the System signature ----- */
.sys-label-micro {
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1.4;
    display: block;
}

/* ----- BUTTON ----- */
.sys-btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    border: 1px solid var(--color-fg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing),
                opacity var(--duration-fast) var(--easing);
    text-decoration: none;
    line-height: 1;
    background: var(--color-fg);
    color: var(--color-card);
    padding: 0 18px;
    height: 40px;
}
.sys-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.sys-btn--primary {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--primary:hover:not(:disabled) {
    background: #2a2a2a;
}
.sys-btn--secondary {
    background: var(--color-card);
    color: var(--color-fg);
    border: 1px solid var(--color-fg);
}
.sys-btn--secondary:hover:not(:disabled) {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--destructive {
    background: var(--color-fail);
    color: #FFFFFF;
    border-color: var(--color-fail);
}
.sys-btn--mint {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}
.sys-btn--sm { height: 32px; padding: 0 14px; font-size: var(--text-xs); }
.sys-btn--md { height: 40px; padding: 0 18px; font-size: var(--text-sm); }
.sys-btn--lg { height: 48px; padding: 0 22px; font-size: var(--text-md); }

.sys-btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* ----- INPUT / TEXTAREA — bottom-border only ----- */
.sys-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}
.sys-field__label { /* alias of sys-label-micro for in-field labels */
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-field__hint {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-fg-muted);
}
.sys-field__hint--error { color: var(--color-fail); }

.sys-input,
.sys-textarea {
    font-family: var(--font-mono);
    font-size: var(--text-md);
    color: var(--color-fg);
    background: transparent;
    border: none;
    border-bottom: 1px solid #E0E0E0;
    border-radius: 0;
    padding: 8px 0;
    width: 100%;
    outline: none;
    transition: border-color var(--duration-base) var(--easing);
}
.sys-input:focus,
.sys-textarea:focus { border-bottom-color: var(--color-fg); }
.sys-input--error,
.sys-textarea--error { border-bottom-color: var(--color-fail); }
.sys-input::placeholder,
.sys-textarea::placeholder { color: var(--color-fg-faint); }

.sys-input--sm { font-size: var(--text-sm); padding: 6px 0; }
.sys-input--md { font-size: var(--text-md); }
.sys-input--lg { font-size: var(--text-xl); padding: 10px 0; }

.sys-input--display {
    font-family: var(--font-display);
    font-weight: var(--weight-light);
    font-size: var(--text-5xl);
    letter-spacing: var(--display-letter-spacing);
    line-height: var(--display-line-height);
    padding: 6px 0;
}

.sys-textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.55;
}

/* ----- SELECT ----- */
.sys-select {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    color: var(--color-fg);
    background: var(--color-card);
    border: 1px solid #E0E0E0;
    border-radius: var(--radius-md);
    padding: 10px 36px 10px 14px;
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: border-color var(--duration-base) var(--easing),
                box-shadow var(--duration-base) var(--easing);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%230D0D0D' stroke-width='2' stroke-linecap='square' stroke-linejoin='miter'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 14px center;
    outline: none;
}
.sys-select:focus {
    border-color: var(--color-fg);
    box-shadow: var(--shadow-soft);
}

/* ----- CARD ----- */
.sys-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}
.sys-card--lg { padding: var(--space-8); }
.sys-card--dark {
    background: var(--color-dark-bg);
    color: var(--color-dark-fg);
}
.sys-card--accent {
    border-left: 3px solid var(--color-accent);
}
.sys-card__code-texture {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 8px;
    line-height: 1.4;
    color: var(--color-fg-ghost);
    text-align: right;
    pointer-events: none;
    white-space: pre;
}
.sys-card--dark .sys-card__code-texture {
    color: rgba(255, 255, 255, 0.08);
}

/* ----- BADGE ----- */
.sys-badge {
    display: inline-flex;
    align-items: center;
    background: var(--color-card);
    color: var(--color-fg-muted);
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-family: var(--font-mono);
    font-size: 9px;
    line-height: 1.4;
    letter-spacing: var(--button-letter-spacing);
    text-transform: uppercase;
}
.sys-badge--filled {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}

/* ----- DIALOG ----- */
.sys-dialog-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(13, 13, 13, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    animation: sys-fade-in 200ms var(--easing);
}
.sys-dialog {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    max-width: 480px;
    width: 100%;
    padding: var(--space-8);
    position: relative;
    animation: sys-pop-in 220ms var(--easing);
}
.sys-dialog__title {
    font-family: var(--font-display);
    font-weight: var(--weight-normal);
    font-size: 28px;
    line-height: 1.1;
    letter-spacing: -0.5px;
    margin: 0 0 var(--space-3);
}
.sys-dialog__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 28px;
    height: 28px;
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    background: var(--color-card);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-dialog__close:hover {
    background: var(--color-fg);
    color: var(--color-card);
    border-color: var(--color-fg);
}

@keyframes sys-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes sys-pop-in {
    from { opacity: 0; transform: translateY(8px) scale(0.99); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ----- TABS — segmented nav-items ----- */
.sys-tabs {
    display: inline-flex;
    background: var(--color-card);
    border: 1px solid var(--color-divider);
    padding: 0;
    gap: 0;
}
.sys-tabs__btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--color-fg);
    cursor: pointer;
    border-radius: 0;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing);
    line-height: 1;
}
.sys-tabs__btn:not(.sys-tabs__btn--active):hover {
    background: var(--color-divider);
}
.sys-tabs__btn--active {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-tabs__btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: -2px;
}

/* ----- SWITCH — square checkbox ----- */
.sys-switch {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
}
.sys-switch__box {
    width: 18px;
    height: 18px;
    border: 2px solid #DDDDDD;
    border-radius: var(--radius-md);
    background: transparent;
    position: relative;
    flex-shrink: 0;
    transition: background var(--duration-base) var(--easing),
                border-color var(--duration-base) var(--easing);
    display: flex;
    align-items: center;
    justify-content: center;
}
.sys-switch__check {
    width: 10px;
    height: 10px;
    color: var(--color-card);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--easing);
}
.sys-switch__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.sys-switch__input:checked + .sys-switch__box {
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.sys-switch__input:checked + .sys-switch__box .sys-switch__check {
    opacity: 1;
    color: var(--color-fg);
}
.sys-switch__input:focus-visible + .sys-switch__box {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* terminal switch variant — "[X]/[ ] LABEL" pattern */
.sys-switch--terminal {
    gap: 8px;
}
.sys-switch--terminal .sys-switch__box {
    display: none;
}
.sys-switch--terminal .sys-switch__bracket {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--color-fg);
    line-height: 1;
}
.sys-switch--terminal .sys-switch__input:not(:checked) ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:not(:checked) ~ * {
    opacity: 0.5;
}
.sys-switch--terminal .sys-switch__input:checked ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:checked ~ * {
    opacity: 1;
}

/* ----- TOAST ----- */
.sys-toast-region {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
    width: max-content;
    max-width: calc(100vw - 48px);
}
.sys-toast {
    background: var(--color-card);
    color: var(--color-fg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: 14px 18px;
    border-left: 3px solid var(--color-accent);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    pointer-events: auto;
    animation: sys-toast-in 280ms var(--easing);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
    min-width: 280px;
    align-items: baseline;
}
.sys-toast__title {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-xs);
}
.sys-toast__time {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-fg-muted);
    text-align: right;
    grid-column: 2;
    grid-row: 1;
}
.sys-toast__desc {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-fg-muted);
    grid-column: 1 / -1;
    line-height: 1.5;
}
.sys-toast--success { border-left-color: var(--color-accent); }
.sys-toast--error { border-left-color: var(--color-fail); }
.sys-toast--default { border-left-color: var(--color-fg); }

@keyframes sys-toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ----- BLINKING CURSOR ----- */
.sys-cursor {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--color-accent);
    animation: sys-blink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 4px;
}
.sys-cursor--fg {
    background: var(--color-fg);
}
@keyframes sys-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

Step 5 — Wrap the section/page you want themed with <div data-system="system">:

  <div data-system="system">
    <Button>HELLO SYSTEM</Button>
    <Card>...</Card>
  </div>

Done. Now <Button>, <Input>, <Card>, <Badge>, <Dialog>, <Tabs>, <Switch>, <Toast>, <Select>, <Textarea> render in System.
Install the Wardrobe System theme in this v0 project. Treat each step below as a concrete file or edit you must make.

Step 1 — Add this to globals.css:

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=Space+Grotesk:wght@300;400;500;600&display=swap");

/* =========================================================
   Wardrobe — SYSTEM tokens
   Scoped via :where() for low specificity.
   Activate by adding data-system="system" to a body or wrapper.
   ========================================================= */

:where([data-system="system"]) {
    /* Surface */
    --color-bg: #F4F4F4;
    --color-card: #FFFFFF;
    --color-fg: #0D0D0D;
    --color-fg-muted: #888888;
    --color-fg-faint: #BBBBBB;
    --color-fg-ghost: #EEEEEE;
    --color-divider: #F0F0F0;

    /* Accents */
    --color-accent: #6CEFA0;
    --color-accent-blue: #6CDDEF;
    --color-accent-purple: #B06CEF;
    --color-accent-orange: #EF9B6C;
    --color-success: #6CEFA0;
    --color-fail: #FF6B6B;

    /* Dark inversions (analysis panels in light dashboards) */
    --color-dark-bg: #1A1A1A;
    --color-dark-fg: #DDDDDD;
    --color-dark-muted: #888888;

    /* Borders */
    --border: 1px solid rgba(0, 0, 0, 0.05);
    --border-strong: 1px solid #EEEEEE;
    --border-color: rgba(0, 0, 0, 0.05);

    /* Radius — sharp! 2px MAX. Never pill. */
    --radius-sm: 1px;
    --radius-md: 2px;
    --radius-lg: 2px;
    --radius-full: 9999px;

    /* Typography */
    --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Type scale */
    --text-micro: 10px;
    --text-xs: 11px;
    --text-sm: 12px;
    --text-base: 13px;
    --text-md: 14px;
    --text-lg: 16px;
    --text-xl: 18px;
    --text-2xl: 24px;
    --text-3xl: 32px;
    --text-4xl: 42px;
    --text-5xl: 48px;
    --text-6xl: 64px;

    --display-letter-spacing: -2px;
    --display-line-height: 1;
    --label-letter-spacing: 1.5px;
    --button-letter-spacing: 1px;

    /* Weights */
    --weight-light: 300;
    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Shadow — soft only. Borders are nearly invisible. */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-flat: 0 1px 2px rgba(0, 0, 0, 0.03);

    /* Motion */
    --duration-fast: 100ms;
    --duration-base: 200ms;
    --easing: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-system="system"] {
    background: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


Step 2 — Create components/ui/wardrobe/cn.ts:

export function cn(...classes: Array<string | false | null | undefined>): string {
    return classes.filter(Boolean).join(" ");
}


Step 3 — Create the following 10 component files in components/ui/wardrobe/:

--- components/ui/wardrobe/Button.tsx ---

import * as React from "react";
import { cn } from "./cn";

type ButtonProps = {
    variant?: "primary" | "secondary" | "destructive" | "mint";
    size?: "sm" | "md" | "lg";
    children: React.ReactNode;
} & React.ButtonHTMLAttributes<HTMLButtonElement>;

export function Button({
    variant = "primary",
    size = "md",
    className,
    children,
    ...props
}: ButtonProps) {
    return (
        <button
            className={cn("sys-btn", `sys-btn--${variant}`, `sys-btn--${size}`, className)}
            {...props}
        >
            {children}
        </button>
    );
}


--- components/ui/wardrobe/Input.tsx ---

import * as React from "react";
import { cn } from "./cn";

type InputProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
    display?: boolean;
} & Omit<React.InputHTMLAttributes<HTMLInputElement>, "size">;

export function Input({
    size = "md",
    variant = "default",
    label,
    hint,
    display,
    className,
    id,
    ...props
}: InputProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <input
                id={inputId}
                className={cn(
                    "sys-input",
                    `sys-input--${size}`,
                    variant === "error" && "sys-input--error",
                    display && "sys-input--display",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Textarea.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TextareaProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
} & Omit<React.TextareaHTMLAttributes<HTMLTextAreaElement>, "size">;

export function Textarea({
    size = "md",
    variant = "default",
    label,
    hint,
    className,
    id,
    ...props
}: TextareaProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <textarea
                id={inputId}
                className={cn(
                    "sys-textarea",
                    `sys-input--${size}`,
                    variant === "error" && "sys-textarea--error",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Select.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SelectProps = {
    options: Array<{ value: string; label: string }>;
    value: string;
    onValueChange: (value: string) => void;
    placeholder?: string;
    label?: string;
} & Omit<
    React.SelectHTMLAttributes<HTMLSelectElement>,
    "value" | "onChange" | "size"
>;

export function Select({
    options,
    value,
    onValueChange,
    placeholder,
    label,
    className,
    id,
    ...props
}: SelectProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <select
                id={inputId}
                value={value}
                onChange={(e) => onValueChange(e.target.value)}
                className={cn("sys-select", className)}
                {...props}
            >
                {placeholder && (
                    <option value="" disabled>
                        {placeholder}
                    </option>
                )}
                {options.map((opt) => (
                    <option key={opt.value} value={opt.value}>
                        {opt.label}
                    </option>
                ))}
            </select>
        </label>
    );
}


--- components/ui/wardrobe/Card.tsx ---

import * as React from "react";
import { cn } from "./cn";

type CardProps = {
    variant?: "default" | "dark" | "accent";
    size?: "default" | "lg";
    codeTexture?: string;
    children: React.ReactNode;
} & React.HTMLAttributes<HTMLDivElement>;

export function Card({
    variant = "default",
    size = "default",
    codeTexture,
    className,
    children,
    ...props
}: CardProps) {
    return (
        <div
            className={cn(
                "sys-card",
                variant !== "default" && `sys-card--${variant}`,
                size !== "default" && `sys-card--${size}`,
                className,
            )}
            {...props}
        >
            {codeTexture && (
                <span className="sys-card__code-texture">{codeTexture}</span>
            )}
            {children}
        </div>
    );
}


--- components/ui/wardrobe/Badge.tsx ---

import * as React from "react";
import { cn } from "./cn";

type BadgeProps = {
    variant?: "default" | "filled";
    children: React.ReactNode;
    className?: string;
};

export function Badge({ variant = "default", children, className }: BadgeProps) {
    return (
        <span
            className={cn(
                "sys-badge",
                variant === "filled" && "sys-badge--filled",
                className,
            )}
        >
            {children}
        </span>
    );
}


--- components/ui/wardrobe/Dialog.tsx ---

import * as React from "react";

type DialogProps = {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    title: string;
    children: React.ReactNode;
};

export function Dialog({ open, onOpenChange, title, children }: DialogProps) {
    const dialogRef = React.useRef<HTMLDivElement>(null);
    const previousFocus = React.useRef<HTMLElement | null>(null);

    React.useEffect(() => {
        if (!open) return;

        previousFocus.current = document.activeElement as HTMLElement;
        const focusable = dialogRef.current?.querySelectorAll<HTMLElement>(
            'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])',
        );
        focusable?.[0]?.focus();

        function onKey(e: KeyboardEvent) {
            if (e.key === "Escape") {
                e.preventDefault();
                onOpenChange(false);
                return;
            }
            if (e.key !== "Tab" || !focusable || focusable.length === 0) return;
            const first = focusable[0];
            const last = focusable[focusable.length - 1];
            if (e.shiftKey && document.activeElement === first) {
                e.preventDefault();
                last.focus();
            } else if (!e.shiftKey && document.activeElement === last) {
                e.preventDefault();
                first.focus();
            }
        }

        document.addEventListener("keydown", onKey);
        const prevOverflow = document.body.style.overflow;
        document.body.style.overflow = "hidden";
        return () => {
            document.removeEventListener("keydown", onKey);
            document.body.style.overflow = prevOverflow;
            previousFocus.current?.focus();
        };
    }, [open, onOpenChange]);

    if (!open) return null;

    return (
        <div
            className="sys-dialog-backdrop"
            onClick={(e) => {
                if (e.target === e.currentTarget) onOpenChange(false);
            }}
        >
            <div
                ref={dialogRef}
                className="sys-dialog"
                role="dialog"
                aria-modal="true"
                aria-labelledby="sys-dialog-title"
            >
                <button
                    type="button"
                    className="sys-dialog__close"
                    onClick={() => onOpenChange(false)}
                    aria-label="Close"
                >
                    ×
                </button>
                <h2 id="sys-dialog-title" className="sys-dialog__title">
                    {title}
                </h2>
                {children}
            </div>
        </div>
    );
}


--- components/ui/wardrobe/Tabs.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TabsProps = {
    tabs: Array<{ id: string; label: string }>;
    activeId: string;
    onTabChange: (id: string) => void;
    className?: string;
};

export function Tabs({ tabs, activeId, onTabChange, className }: TabsProps) {
    return (
        <div role="tablist" className={cn("sys-tabs", className)}>
            {tabs.map((tab) => (
                <button
                    key={tab.id}
                    role="tab"
                    aria-selected={tab.id === activeId}
                    type="button"
                    className={cn(
                        "sys-tabs__btn",
                        tab.id === activeId && "sys-tabs__btn--active",
                    )}
                    onClick={() => onTabChange(tab.id)}
                    onKeyDown={(e) => {
                        if (e.key !== "ArrowRight" && e.key !== "ArrowLeft") return;
                        e.preventDefault();
                        const idx = tabs.findIndex((t) => t.id === activeId);
                        const next =
                            e.key === "ArrowRight"
                                ? (idx + 1) % tabs.length
                                : (idx - 1 + tabs.length) % tabs.length;
                        onTabChange(tabs[next].id);
                    }}
                >
                    {tab.label}
                </button>
            ))}
        </div>
    );
}


--- components/ui/wardrobe/Switch.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SwitchProps = {
    checked: boolean;
    onCheckedChange: (checked: boolean) => void;
    label?: string;
    id?: string;
    terminal?: boolean;
};

export function Switch({
    checked,
    onCheckedChange,
    label,
    id,
    terminal,
}: SwitchProps) {
    const inputId = id ?? React.useId();
    return (
        <label
            className={cn("sys-switch", terminal && "sys-switch--terminal")}
            htmlFor={inputId}
        >
            <input
                id={inputId}
                type="checkbox"
                role="switch"
                checked={checked}
                onChange={(e) => onCheckedChange(e.target.checked)}
                className="sys-switch__input"
            />
            {terminal ? (
                <>
                    <span className="sys-switch__bracket">
                        {checked ? "[X]" : "[ ]"}
                    </span>
                    {label && <span>{label}</span>}
                </>
            ) : (
                <>
                    <span className="sys-switch__box">
                        <svg
                            className="sys-switch__check"
                            viewBox="0 0 12 12"
                            fill="none"
                            stroke="currentColor"
                            strokeWidth="2"
                            aria-hidden="true"
                        >
                            <polyline points="2 6 5 9 10 3" />
                        </svg>
                    </span>
                    {label && <span>{label}</span>}
                </>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Toast.tsx ---

import * as React from "react";
import { cn } from "./cn";

export type ToastVariant = "default" | "success" | "error";

export type ToastProps = {
    title: string;
    description?: string;
    variant?: ToastVariant;
};

type ToastEntry = ToastProps & { id: number; time: string };

type ToastContextValue = {
    show: (toast: ToastProps) => void;
};

const ToastContext = React.createContext<ToastContextValue | null>(null);

export function useToast() {
    const ctx = React.useContext(ToastContext);
    if (!ctx) throw new Error("useToast must be used within <ToastProvider>");
    return ctx;
}

function timestamp(): string {
    const d = new Date();
    const pad = (n: number) => String(n).padStart(2, "0");
    const ms = String(Math.floor(d.getMilliseconds() / 10)).padStart(2, "0");
    return `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}.${ms}`;
}

export function ToastProvider({ children }: { children: React.ReactNode }) {
    const [toasts, setToasts] = React.useState<ToastEntry[]>([]);
    const idRef = React.useRef(0);

    const show = React.useCallback((toast: ToastProps) => {
        const id = ++idRef.current;
        setToasts((prev) => [...prev, { ...toast, id, time: timestamp() }]);
        window.setTimeout(() => {
            setToasts((prev) => prev.filter((t) => t.id !== id));
        }, 4000);
    }, []);

    return (
        <ToastContext.Provider value={{ show }}>
            {children}
            <div
                className="sys-toast-region"
                role="region"
                aria-label="Notifications"
                aria-live="polite"
            >
                {toasts.map((t) => (
                    <Toast key={t.id} {...t} />
                ))}
            </div>
        </ToastContext.Provider>
    );
}

type ToastViewProps = ToastProps & { time?: string };

export function Toast({
    title,
    description,
    variant = "default",
    time,
}: ToastViewProps) {
    return (
        <div
            className={cn(
                "sys-toast",
                variant === "success" && "sys-toast--success",
                variant === "error" && "sys-toast--error",
                variant === "default" && "sys-toast--default",
            )}
            role="status"
        >
            <span className="sys-toast__title">{title}</span>
            {time && <span className="sys-toast__time">{time}</span>}
            {description && (
                <span className="sys-toast__desc">{description}</span>
            )}
        </div>
    );
}


Step 4 — Add globals.css component styles. Append the following to globals.css below the tokens:

/* =========================================================
   Wardrobe — SYSTEM globals
   Loads display + mono fonts and base component styles.
   Only active on elements with data-system="system".
   ========================================================= */



[data-system="system"] *,
[data-system="system"] *::before,
[data-system="system"] *::after {
    box-sizing: border-box;
}

[data-system="system"] {
    min-height: 100vh;
}

/* ----- LABEL MICRO — the System signature ----- */
.sys-label-micro {
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1.4;
    display: block;
}

/* ----- BUTTON ----- */
.sys-btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    border: 1px solid var(--color-fg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing),
                opacity var(--duration-fast) var(--easing);
    text-decoration: none;
    line-height: 1;
    background: var(--color-fg);
    color: var(--color-card);
    padding: 0 18px;
    height: 40px;
}
.sys-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.sys-btn--primary {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--primary:hover:not(:disabled) {
    background: #2a2a2a;
}
.sys-btn--secondary {
    background: var(--color-card);
    color: var(--color-fg);
    border: 1px solid var(--color-fg);
}
.sys-btn--secondary:hover:not(:disabled) {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--destructive {
    background: var(--color-fail);
    color: #FFFFFF;
    border-color: var(--color-fail);
}
.sys-btn--mint {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}
.sys-btn--sm { height: 32px; padding: 0 14px; font-size: var(--text-xs); }
.sys-btn--md { height: 40px; padding: 0 18px; font-size: var(--text-sm); }
.sys-btn--lg { height: 48px; padding: 0 22px; font-size: var(--text-md); }

.sys-btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* ----- INPUT / TEXTAREA — bottom-border only ----- */
.sys-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}
.sys-field__label { /* alias of sys-label-micro for in-field labels */
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-field__hint {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-fg-muted);
}
.sys-field__hint--error { color: var(--color-fail); }

.sys-input,
.sys-textarea {
    font-family: var(--font-mono);
    font-size: var(--text-md);
    color: var(--color-fg);
    background: transparent;
    border: none;
    border-bottom: 1px solid #E0E0E0;
    border-radius: 0;
    padding: 8px 0;
    width: 100%;
    outline: none;
    transition: border-color var(--duration-base) var(--easing);
}
.sys-input:focus,
.sys-textarea:focus { border-bottom-color: var(--color-fg); }
.sys-input--error,
.sys-textarea--error { border-bottom-color: var(--color-fail); }
.sys-input::placeholder,
.sys-textarea::placeholder { color: var(--color-fg-faint); }

.sys-input--sm { font-size: var(--text-sm); padding: 6px 0; }
.sys-input--md { font-size: var(--text-md); }
.sys-input--lg { font-size: var(--text-xl); padding: 10px 0; }

.sys-input--display {
    font-family: var(--font-display);
    font-weight: var(--weight-light);
    font-size: var(--text-5xl);
    letter-spacing: var(--display-letter-spacing);
    line-height: var(--display-line-height);
    padding: 6px 0;
}

.sys-textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.55;
}

/* ----- SELECT ----- */
.sys-select {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    color: var(--color-fg);
    background: var(--color-card);
    border: 1px solid #E0E0E0;
    border-radius: var(--radius-md);
    padding: 10px 36px 10px 14px;
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: border-color var(--duration-base) var(--easing),
                box-shadow var(--duration-base) var(--easing);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%230D0D0D' stroke-width='2' stroke-linecap='square' stroke-linejoin='miter'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 14px center;
    outline: none;
}
.sys-select:focus {
    border-color: var(--color-fg);
    box-shadow: var(--shadow-soft);
}

/* ----- CARD ----- */
.sys-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}
.sys-card--lg { padding: var(--space-8); }
.sys-card--dark {
    background: var(--color-dark-bg);
    color: var(--color-dark-fg);
}
.sys-card--accent {
    border-left: 3px solid var(--color-accent);
}
.sys-card__code-texture {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 8px;
    line-height: 1.4;
    color: var(--color-fg-ghost);
    text-align: right;
    pointer-events: none;
    white-space: pre;
}
.sys-card--dark .sys-card__code-texture {
    color: rgba(255, 255, 255, 0.08);
}

/* ----- BADGE ----- */
.sys-badge {
    display: inline-flex;
    align-items: center;
    background: var(--color-card);
    color: var(--color-fg-muted);
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-family: var(--font-mono);
    font-size: 9px;
    line-height: 1.4;
    letter-spacing: var(--button-letter-spacing);
    text-transform: uppercase;
}
.sys-badge--filled {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}

/* ----- DIALOG ----- */
.sys-dialog-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(13, 13, 13, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    animation: sys-fade-in 200ms var(--easing);
}
.sys-dialog {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    max-width: 480px;
    width: 100%;
    padding: var(--space-8);
    position: relative;
    animation: sys-pop-in 220ms var(--easing);
}
.sys-dialog__title {
    font-family: var(--font-display);
    font-weight: var(--weight-normal);
    font-size: 28px;
    line-height: 1.1;
    letter-spacing: -0.5px;
    margin: 0 0 var(--space-3);
}
.sys-dialog__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 28px;
    height: 28px;
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    background: var(--color-card);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-dialog__close:hover {
    background: var(--color-fg);
    color: var(--color-card);
    border-color: var(--color-fg);
}

@keyframes sys-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes sys-pop-in {
    from { opacity: 0; transform: translateY(8px) scale(0.99); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ----- TABS — segmented nav-items ----- */
.sys-tabs {
    display: inline-flex;
    background: var(--color-card);
    border: 1px solid var(--color-divider);
    padding: 0;
    gap: 0;
}
.sys-tabs__btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--color-fg);
    cursor: pointer;
    border-radius: 0;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing);
    line-height: 1;
}
.sys-tabs__btn:not(.sys-tabs__btn--active):hover {
    background: var(--color-divider);
}
.sys-tabs__btn--active {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-tabs__btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: -2px;
}

/* ----- SWITCH — square checkbox ----- */
.sys-switch {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
}
.sys-switch__box {
    width: 18px;
    height: 18px;
    border: 2px solid #DDDDDD;
    border-radius: var(--radius-md);
    background: transparent;
    position: relative;
    flex-shrink: 0;
    transition: background var(--duration-base) var(--easing),
                border-color var(--duration-base) var(--easing);
    display: flex;
    align-items: center;
    justify-content: center;
}
.sys-switch__check {
    width: 10px;
    height: 10px;
    color: var(--color-card);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--easing);
}
.sys-switch__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.sys-switch__input:checked + .sys-switch__box {
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.sys-switch__input:checked + .sys-switch__box .sys-switch__check {
    opacity: 1;
    color: var(--color-fg);
}
.sys-switch__input:focus-visible + .sys-switch__box {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* terminal switch variant — "[X]/[ ] LABEL" pattern */
.sys-switch--terminal {
    gap: 8px;
}
.sys-switch--terminal .sys-switch__box {
    display: none;
}
.sys-switch--terminal .sys-switch__bracket {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--color-fg);
    line-height: 1;
}
.sys-switch--terminal .sys-switch__input:not(:checked) ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:not(:checked) ~ * {
    opacity: 0.5;
}
.sys-switch--terminal .sys-switch__input:checked ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:checked ~ * {
    opacity: 1;
}

/* ----- TOAST ----- */
.sys-toast-region {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
    width: max-content;
    max-width: calc(100vw - 48px);
}
.sys-toast {
    background: var(--color-card);
    color: var(--color-fg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: 14px 18px;
    border-left: 3px solid var(--color-accent);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    pointer-events: auto;
    animation: sys-toast-in 280ms var(--easing);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
    min-width: 280px;
    align-items: baseline;
}
.sys-toast__title {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-xs);
}
.sys-toast__time {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-fg-muted);
    text-align: right;
    grid-column: 2;
    grid-row: 1;
}
.sys-toast__desc {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-fg-muted);
    grid-column: 1 / -1;
    line-height: 1.5;
}
.sys-toast--success { border-left-color: var(--color-accent); }
.sys-toast--error { border-left-color: var(--color-fail); }
.sys-toast--default { border-left-color: var(--color-fg); }

@keyframes sys-toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ----- BLINKING CURSOR ----- */
.sys-cursor {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--color-accent);
    animation: sys-blink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 4px;
}
.sys-cursor--fg {
    background: var(--color-fg);
}
@keyframes sys-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

Step 5 — Wrap the section/page you want themed with <div data-system="system">:

  <div data-system="system">
    <Button>HELLO SYSTEM</Button>
    <Card>...</Card>
  </div>

Done. Now <Button>, <Input>, <Card>, <Badge>, <Dialog>, <Tabs>, <Switch>, <Toast>, <Select>, <Textarea> render in System.
Install the Wardrobe System theme in my Lovable project. Each step below maps to a specific file or change.

Step 1 — Add this to globals.css:

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=Space+Grotesk:wght@300;400;500;600&display=swap");

/* =========================================================
   Wardrobe — SYSTEM tokens
   Scoped via :where() for low specificity.
   Activate by adding data-system="system" to a body or wrapper.
   ========================================================= */

:where([data-system="system"]) {
    /* Surface */
    --color-bg: #F4F4F4;
    --color-card: #FFFFFF;
    --color-fg: #0D0D0D;
    --color-fg-muted: #888888;
    --color-fg-faint: #BBBBBB;
    --color-fg-ghost: #EEEEEE;
    --color-divider: #F0F0F0;

    /* Accents */
    --color-accent: #6CEFA0;
    --color-accent-blue: #6CDDEF;
    --color-accent-purple: #B06CEF;
    --color-accent-orange: #EF9B6C;
    --color-success: #6CEFA0;
    --color-fail: #FF6B6B;

    /* Dark inversions (analysis panels in light dashboards) */
    --color-dark-bg: #1A1A1A;
    --color-dark-fg: #DDDDDD;
    --color-dark-muted: #888888;

    /* Borders */
    --border: 1px solid rgba(0, 0, 0, 0.05);
    --border-strong: 1px solid #EEEEEE;
    --border-color: rgba(0, 0, 0, 0.05);

    /* Radius — sharp! 2px MAX. Never pill. */
    --radius-sm: 1px;
    --radius-md: 2px;
    --radius-lg: 2px;
    --radius-full: 9999px;

    /* Typography */
    --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Type scale */
    --text-micro: 10px;
    --text-xs: 11px;
    --text-sm: 12px;
    --text-base: 13px;
    --text-md: 14px;
    --text-lg: 16px;
    --text-xl: 18px;
    --text-2xl: 24px;
    --text-3xl: 32px;
    --text-4xl: 42px;
    --text-5xl: 48px;
    --text-6xl: 64px;

    --display-letter-spacing: -2px;
    --display-line-height: 1;
    --label-letter-spacing: 1.5px;
    --button-letter-spacing: 1px;

    /* Weights */
    --weight-light: 300;
    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Shadow — soft only. Borders are nearly invisible. */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-flat: 0 1px 2px rgba(0, 0, 0, 0.03);

    /* Motion */
    --duration-fast: 100ms;
    --duration-base: 200ms;
    --easing: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-system="system"] {
    background: var(--color-bg);
    color: var(--color-fg);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


Step 2 — Create components/ui/wardrobe/cn.ts:

export function cn(...classes: Array<string | false | null | undefined>): string {
    return classes.filter(Boolean).join(" ");
}


Step 3 — Create the following 10 component files in components/ui/wardrobe/:

--- components/ui/wardrobe/Button.tsx ---

import * as React from "react";
import { cn } from "./cn";

type ButtonProps = {
    variant?: "primary" | "secondary" | "destructive" | "mint";
    size?: "sm" | "md" | "lg";
    children: React.ReactNode;
} & React.ButtonHTMLAttributes<HTMLButtonElement>;

export function Button({
    variant = "primary",
    size = "md",
    className,
    children,
    ...props
}: ButtonProps) {
    return (
        <button
            className={cn("sys-btn", `sys-btn--${variant}`, `sys-btn--${size}`, className)}
            {...props}
        >
            {children}
        </button>
    );
}


--- components/ui/wardrobe/Input.tsx ---

import * as React from "react";
import { cn } from "./cn";

type InputProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
    display?: boolean;
} & Omit<React.InputHTMLAttributes<HTMLInputElement>, "size">;

export function Input({
    size = "md",
    variant = "default",
    label,
    hint,
    display,
    className,
    id,
    ...props
}: InputProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <input
                id={inputId}
                className={cn(
                    "sys-input",
                    `sys-input--${size}`,
                    variant === "error" && "sys-input--error",
                    display && "sys-input--display",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Textarea.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TextareaProps = {
    size?: "sm" | "md" | "lg";
    variant?: "default" | "error";
    label?: string;
    hint?: string;
} & Omit<React.TextareaHTMLAttributes<HTMLTextAreaElement>, "size">;

export function Textarea({
    size = "md",
    variant = "default",
    label,
    hint,
    className,
    id,
    ...props
}: TextareaProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <textarea
                id={inputId}
                className={cn(
                    "sys-textarea",
                    `sys-input--${size}`,
                    variant === "error" && "sys-textarea--error",
                    className,
                )}
                aria-invalid={variant === "error" || undefined}
                {...props}
            />
            {hint && (
                <span
                    className={cn(
                        "sys-field__hint",
                        variant === "error" && "sys-field__hint--error",
                    )}
                >
                    {hint}
                </span>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Select.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SelectProps = {
    options: Array<{ value: string; label: string }>;
    value: string;
    onValueChange: (value: string) => void;
    placeholder?: string;
    label?: string;
} & Omit<
    React.SelectHTMLAttributes<HTMLSelectElement>,
    "value" | "onChange" | "size"
>;

export function Select({
    options,
    value,
    onValueChange,
    placeholder,
    label,
    className,
    id,
    ...props
}: SelectProps) {
    const inputId = id ?? React.useId();
    return (
        <label className="sys-field" htmlFor={inputId}>
            {label && <span className="sys-field__label">{label}</span>}
            <select
                id={inputId}
                value={value}
                onChange={(e) => onValueChange(e.target.value)}
                className={cn("sys-select", className)}
                {...props}
            >
                {placeholder && (
                    <option value="" disabled>
                        {placeholder}
                    </option>
                )}
                {options.map((opt) => (
                    <option key={opt.value} value={opt.value}>
                        {opt.label}
                    </option>
                ))}
            </select>
        </label>
    );
}


--- components/ui/wardrobe/Card.tsx ---

import * as React from "react";
import { cn } from "./cn";

type CardProps = {
    variant?: "default" | "dark" | "accent";
    size?: "default" | "lg";
    codeTexture?: string;
    children: React.ReactNode;
} & React.HTMLAttributes<HTMLDivElement>;

export function Card({
    variant = "default",
    size = "default",
    codeTexture,
    className,
    children,
    ...props
}: CardProps) {
    return (
        <div
            className={cn(
                "sys-card",
                variant !== "default" && `sys-card--${variant}`,
                size !== "default" && `sys-card--${size}`,
                className,
            )}
            {...props}
        >
            {codeTexture && (
                <span className="sys-card__code-texture">{codeTexture}</span>
            )}
            {children}
        </div>
    );
}


--- components/ui/wardrobe/Badge.tsx ---

import * as React from "react";
import { cn } from "./cn";

type BadgeProps = {
    variant?: "default" | "filled";
    children: React.ReactNode;
    className?: string;
};

export function Badge({ variant = "default", children, className }: BadgeProps) {
    return (
        <span
            className={cn(
                "sys-badge",
                variant === "filled" && "sys-badge--filled",
                className,
            )}
        >
            {children}
        </span>
    );
}


--- components/ui/wardrobe/Dialog.tsx ---

import * as React from "react";

type DialogProps = {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    title: string;
    children: React.ReactNode;
};

export function Dialog({ open, onOpenChange, title, children }: DialogProps) {
    const dialogRef = React.useRef<HTMLDivElement>(null);
    const previousFocus = React.useRef<HTMLElement | null>(null);

    React.useEffect(() => {
        if (!open) return;

        previousFocus.current = document.activeElement as HTMLElement;
        const focusable = dialogRef.current?.querySelectorAll<HTMLElement>(
            'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])',
        );
        focusable?.[0]?.focus();

        function onKey(e: KeyboardEvent) {
            if (e.key === "Escape") {
                e.preventDefault();
                onOpenChange(false);
                return;
            }
            if (e.key !== "Tab" || !focusable || focusable.length === 0) return;
            const first = focusable[0];
            const last = focusable[focusable.length - 1];
            if (e.shiftKey && document.activeElement === first) {
                e.preventDefault();
                last.focus();
            } else if (!e.shiftKey && document.activeElement === last) {
                e.preventDefault();
                first.focus();
            }
        }

        document.addEventListener("keydown", onKey);
        const prevOverflow = document.body.style.overflow;
        document.body.style.overflow = "hidden";
        return () => {
            document.removeEventListener("keydown", onKey);
            document.body.style.overflow = prevOverflow;
            previousFocus.current?.focus();
        };
    }, [open, onOpenChange]);

    if (!open) return null;

    return (
        <div
            className="sys-dialog-backdrop"
            onClick={(e) => {
                if (e.target === e.currentTarget) onOpenChange(false);
            }}
        >
            <div
                ref={dialogRef}
                className="sys-dialog"
                role="dialog"
                aria-modal="true"
                aria-labelledby="sys-dialog-title"
            >
                <button
                    type="button"
                    className="sys-dialog__close"
                    onClick={() => onOpenChange(false)}
                    aria-label="Close"
                >
                    ×
                </button>
                <h2 id="sys-dialog-title" className="sys-dialog__title">
                    {title}
                </h2>
                {children}
            </div>
        </div>
    );
}


--- components/ui/wardrobe/Tabs.tsx ---

import * as React from "react";
import { cn } from "./cn";

type TabsProps = {
    tabs: Array<{ id: string; label: string }>;
    activeId: string;
    onTabChange: (id: string) => void;
    className?: string;
};

export function Tabs({ tabs, activeId, onTabChange, className }: TabsProps) {
    return (
        <div role="tablist" className={cn("sys-tabs", className)}>
            {tabs.map((tab) => (
                <button
                    key={tab.id}
                    role="tab"
                    aria-selected={tab.id === activeId}
                    type="button"
                    className={cn(
                        "sys-tabs__btn",
                        tab.id === activeId && "sys-tabs__btn--active",
                    )}
                    onClick={() => onTabChange(tab.id)}
                    onKeyDown={(e) => {
                        if (e.key !== "ArrowRight" && e.key !== "ArrowLeft") return;
                        e.preventDefault();
                        const idx = tabs.findIndex((t) => t.id === activeId);
                        const next =
                            e.key === "ArrowRight"
                                ? (idx + 1) % tabs.length
                                : (idx - 1 + tabs.length) % tabs.length;
                        onTabChange(tabs[next].id);
                    }}
                >
                    {tab.label}
                </button>
            ))}
        </div>
    );
}


--- components/ui/wardrobe/Switch.tsx ---

import * as React from "react";
import { cn } from "./cn";

type SwitchProps = {
    checked: boolean;
    onCheckedChange: (checked: boolean) => void;
    label?: string;
    id?: string;
    terminal?: boolean;
};

export function Switch({
    checked,
    onCheckedChange,
    label,
    id,
    terminal,
}: SwitchProps) {
    const inputId = id ?? React.useId();
    return (
        <label
            className={cn("sys-switch", terminal && "sys-switch--terminal")}
            htmlFor={inputId}
        >
            <input
                id={inputId}
                type="checkbox"
                role="switch"
                checked={checked}
                onChange={(e) => onCheckedChange(e.target.checked)}
                className="sys-switch__input"
            />
            {terminal ? (
                <>
                    <span className="sys-switch__bracket">
                        {checked ? "[X]" : "[ ]"}
                    </span>
                    {label && <span>{label}</span>}
                </>
            ) : (
                <>
                    <span className="sys-switch__box">
                        <svg
                            className="sys-switch__check"
                            viewBox="0 0 12 12"
                            fill="none"
                            stroke="currentColor"
                            strokeWidth="2"
                            aria-hidden="true"
                        >
                            <polyline points="2 6 5 9 10 3" />
                        </svg>
                    </span>
                    {label && <span>{label}</span>}
                </>
            )}
        </label>
    );
}


--- components/ui/wardrobe/Toast.tsx ---

import * as React from "react";
import { cn } from "./cn";

export type ToastVariant = "default" | "success" | "error";

export type ToastProps = {
    title: string;
    description?: string;
    variant?: ToastVariant;
};

type ToastEntry = ToastProps & { id: number; time: string };

type ToastContextValue = {
    show: (toast: ToastProps) => void;
};

const ToastContext = React.createContext<ToastContextValue | null>(null);

export function useToast() {
    const ctx = React.useContext(ToastContext);
    if (!ctx) throw new Error("useToast must be used within <ToastProvider>");
    return ctx;
}

function timestamp(): string {
    const d = new Date();
    const pad = (n: number) => String(n).padStart(2, "0");
    const ms = String(Math.floor(d.getMilliseconds() / 10)).padStart(2, "0");
    return `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}.${ms}`;
}

export function ToastProvider({ children }: { children: React.ReactNode }) {
    const [toasts, setToasts] = React.useState<ToastEntry[]>([]);
    const idRef = React.useRef(0);

    const show = React.useCallback((toast: ToastProps) => {
        const id = ++idRef.current;
        setToasts((prev) => [...prev, { ...toast, id, time: timestamp() }]);
        window.setTimeout(() => {
            setToasts((prev) => prev.filter((t) => t.id !== id));
        }, 4000);
    }, []);

    return (
        <ToastContext.Provider value={{ show }}>
            {children}
            <div
                className="sys-toast-region"
                role="region"
                aria-label="Notifications"
                aria-live="polite"
            >
                {toasts.map((t) => (
                    <Toast key={t.id} {...t} />
                ))}
            </div>
        </ToastContext.Provider>
    );
}

type ToastViewProps = ToastProps & { time?: string };

export function Toast({
    title,
    description,
    variant = "default",
    time,
}: ToastViewProps) {
    return (
        <div
            className={cn(
                "sys-toast",
                variant === "success" && "sys-toast--success",
                variant === "error" && "sys-toast--error",
                variant === "default" && "sys-toast--default",
            )}
            role="status"
        >
            <span className="sys-toast__title">{title}</span>
            {time && <span className="sys-toast__time">{time}</span>}
            {description && (
                <span className="sys-toast__desc">{description}</span>
            )}
        </div>
    );
}


Step 4 — Add globals.css component styles. Append the following to globals.css below the tokens:

/* =========================================================
   Wardrobe — SYSTEM globals
   Loads display + mono fonts and base component styles.
   Only active on elements with data-system="system".
   ========================================================= */



[data-system="system"] *,
[data-system="system"] *::before,
[data-system="system"] *::after {
    box-sizing: border-box;
}

[data-system="system"] {
    min-height: 100vh;
}

/* ----- LABEL MICRO — the System signature ----- */
.sys-label-micro {
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1.4;
    display: block;
}

/* ----- BUTTON ----- */
.sys-btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    border: 1px solid var(--color-fg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing),
                opacity var(--duration-fast) var(--easing);
    text-decoration: none;
    line-height: 1;
    background: var(--color-fg);
    color: var(--color-card);
    padding: 0 18px;
    height: 40px;
}
.sys-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.sys-btn--primary {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--primary:hover:not(:disabled) {
    background: #2a2a2a;
}
.sys-btn--secondary {
    background: var(--color-card);
    color: var(--color-fg);
    border: 1px solid var(--color-fg);
}
.sys-btn--secondary:hover:not(:disabled) {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-btn--destructive {
    background: var(--color-fail);
    color: #FFFFFF;
    border-color: var(--color-fail);
}
.sys-btn--mint {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}
.sys-btn--sm { height: 32px; padding: 0 14px; font-size: var(--text-xs); }
.sys-btn--md { height: 40px; padding: 0 18px; font-size: var(--text-sm); }
.sys-btn--lg { height: 48px; padding: 0 22px; font-size: var(--text-md); }

.sys-btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* ----- INPUT / TEXTAREA — bottom-border only ----- */
.sys-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}
.sys-field__label { /* alias of sys-label-micro for in-field labels */
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: var(--label-letter-spacing);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-field__hint {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-fg-muted);
}
.sys-field__hint--error { color: var(--color-fail); }

.sys-input,
.sys-textarea {
    font-family: var(--font-mono);
    font-size: var(--text-md);
    color: var(--color-fg);
    background: transparent;
    border: none;
    border-bottom: 1px solid #E0E0E0;
    border-radius: 0;
    padding: 8px 0;
    width: 100%;
    outline: none;
    transition: border-color var(--duration-base) var(--easing);
}
.sys-input:focus,
.sys-textarea:focus { border-bottom-color: var(--color-fg); }
.sys-input--error,
.sys-textarea--error { border-bottom-color: var(--color-fail); }
.sys-input::placeholder,
.sys-textarea::placeholder { color: var(--color-fg-faint); }

.sys-input--sm { font-size: var(--text-sm); padding: 6px 0; }
.sys-input--md { font-size: var(--text-md); }
.sys-input--lg { font-size: var(--text-xl); padding: 10px 0; }

.sys-input--display {
    font-family: var(--font-display);
    font-weight: var(--weight-light);
    font-size: var(--text-5xl);
    letter-spacing: var(--display-letter-spacing);
    line-height: var(--display-line-height);
    padding: 6px 0;
}

.sys-textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.55;
}

/* ----- SELECT ----- */
.sys-select {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    color: var(--color-fg);
    background: var(--color-card);
    border: 1px solid #E0E0E0;
    border-radius: var(--radius-md);
    padding: 10px 36px 10px 14px;
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    transition: border-color var(--duration-base) var(--easing),
                box-shadow var(--duration-base) var(--easing);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%230D0D0D' stroke-width='2' stroke-linecap='square' stroke-linejoin='miter'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat;
    background-position: right 14px center;
    outline: none;
}
.sys-select:focus {
    border-color: var(--color-fg);
    box-shadow: var(--shadow-soft);
}

/* ----- CARD ----- */
.sys-card {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}
.sys-card--lg { padding: var(--space-8); }
.sys-card--dark {
    background: var(--color-dark-bg);
    color: var(--color-dark-fg);
}
.sys-card--accent {
    border-left: 3px solid var(--color-accent);
}
.sys-card__code-texture {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 8px;
    line-height: 1.4;
    color: var(--color-fg-ghost);
    text-align: right;
    pointer-events: none;
    white-space: pre;
}
.sys-card--dark .sys-card__code-texture {
    color: rgba(255, 255, 255, 0.08);
}

/* ----- BADGE ----- */
.sys-badge {
    display: inline-flex;
    align-items: center;
    background: var(--color-card);
    color: var(--color-fg-muted);
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-family: var(--font-mono);
    font-size: 9px;
    line-height: 1.4;
    letter-spacing: var(--button-letter-spacing);
    text-transform: uppercase;
}
.sys-badge--filled {
    background: var(--color-accent);
    color: var(--color-fg);
    border-color: var(--color-accent);
}

/* ----- DIALOG ----- */
.sys-dialog-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(13, 13, 13, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    animation: sys-fade-in 200ms var(--easing);
}
.sys-dialog {
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    max-width: 480px;
    width: 100%;
    padding: var(--space-8);
    position: relative;
    animation: sys-pop-in 220ms var(--easing);
}
.sys-dialog__title {
    font-family: var(--font-display);
    font-weight: var(--weight-normal);
    font-size: 28px;
    line-height: 1.1;
    letter-spacing: -0.5px;
    margin: 0 0 var(--space-3);
}
.sys-dialog__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 28px;
    height: 28px;
    border: 1px solid #DDDDDD;
    border-radius: var(--radius-sm);
    background: var(--color-card);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-fg-muted);
    line-height: 1;
}
.sys-dialog__close:hover {
    background: var(--color-fg);
    color: var(--color-card);
    border-color: var(--color-fg);
}

@keyframes sys-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes sys-pop-in {
    from { opacity: 0; transform: translateY(8px) scale(0.99); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ----- TABS — segmented nav-items ----- */
.sys-tabs {
    display: inline-flex;
    background: var(--color-card);
    border: 1px solid var(--color-divider);
    padding: 0;
    gap: 0;
}
.sys-tabs__btn {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-sm);
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--color-fg);
    cursor: pointer;
    border-radius: 0;
    transition: background var(--duration-fast) var(--easing),
                color var(--duration-fast) var(--easing);
    line-height: 1;
}
.sys-tabs__btn:not(.sys-tabs__btn--active):hover {
    background: var(--color-divider);
}
.sys-tabs__btn--active {
    background: var(--color-fg);
    color: var(--color-card);
}
.sys-tabs__btn:focus-visible {
    outline: 2px solid var(--color-fg);
    outline-offset: -2px;
}

/* ----- SWITCH — square checkbox ----- */
.sys-switch {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
}
.sys-switch__box {
    width: 18px;
    height: 18px;
    border: 2px solid #DDDDDD;
    border-radius: var(--radius-md);
    background: transparent;
    position: relative;
    flex-shrink: 0;
    transition: background var(--duration-base) var(--easing),
                border-color var(--duration-base) var(--easing);
    display: flex;
    align-items: center;
    justify-content: center;
}
.sys-switch__check {
    width: 10px;
    height: 10px;
    color: var(--color-card);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--easing);
}
.sys-switch__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.sys-switch__input:checked + .sys-switch__box {
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.sys-switch__input:checked + .sys-switch__box .sys-switch__check {
    opacity: 1;
    color: var(--color-fg);
}
.sys-switch__input:focus-visible + .sys-switch__box {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* terminal switch variant — "[X]/[ ] LABEL" pattern */
.sys-switch--terminal {
    gap: 8px;
}
.sys-switch--terminal .sys-switch__box {
    display: none;
}
.sys-switch--terminal .sys-switch__bracket {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--color-fg);
    line-height: 1;
}
.sys-switch--terminal .sys-switch__input:not(:checked) ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:not(:checked) ~ * {
    opacity: 0.5;
}
.sys-switch--terminal .sys-switch__input:checked ~ .sys-switch__bracket,
.sys-switch--terminal .sys-switch__input:checked ~ * {
    opacity: 1;
}

/* ----- TOAST ----- */
.sys-toast-region {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
    width: max-content;
    max-width: calc(100vw - 48px);
}
.sys-toast {
    background: var(--color-card);
    color: var(--color-fg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: 14px 18px;
    border-left: 3px solid var(--color-accent);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    pointer-events: auto;
    animation: sys-toast-in 280ms var(--easing);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
    min-width: 280px;
    align-items: baseline;
}
.sys-toast__title {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: var(--button-letter-spacing);
    font-size: var(--text-xs);
}
.sys-toast__time {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-fg-muted);
    text-align: right;
    grid-column: 2;
    grid-row: 1;
}
.sys-toast__desc {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-fg-muted);
    grid-column: 1 / -1;
    line-height: 1.5;
}
.sys-toast--success { border-left-color: var(--color-accent); }
.sys-toast--error { border-left-color: var(--color-fail); }
.sys-toast--default { border-left-color: var(--color-fg); }

@keyframes sys-toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ----- BLINKING CURSOR ----- */
.sys-cursor {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--color-accent);
    animation: sys-blink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 4px;
}
.sys-cursor--fg {
    background: var(--color-fg);
}
@keyframes sys-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

Step 5 — Wrap the section/page you want themed with <div data-system="system">:

  <div data-system="system">
    <Button>HELLO SYSTEM</Button>
    <Card>...</Card>
  </div>

Done. Now <Button>, <Input>, <Card>, <Badge>, <Dialog>, <Tabs>, <Switch>, <Toast>, <Select>, <Textarea> render in System.

Once it's installed, wrap whichever section you want themed:

<div data-system="system">
    <Button>HELLO SYSTEM</Button>
    <Card>...</Card>
</div>

Want to see what it looks like in the wild? Sequence →