/**
 * @license
 * Copyright 2019 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
const t=window.ShadowRoot&&(void 0===window.ShadyCSS||window.ShadyCSS.nativeShadow)&&"adoptedStyleSheets"in Document.prototype&&"replace"in CSSStyleSheet.prototype,e=Symbol(),n=new Map;class s{constructor(t,n){if(this._$cssResult$=!0,n!==e)throw Error("CSSResult is not constructable. Use `unsafeCSS` or `css` instead.");this.cssText=t}get styleSheet(){let e=n.get(this.cssText);return t&&void 0===e&&(n.set(this.cssText,e=new CSSStyleSheet),e.replaceSync(this.cssText)),e}toString(){return this.cssText}}const o=t=>new s("string"==typeof t?t:t+"",e),r=(t,...n)=>{const o=1===t.length?t[0]:n.reduce(((e,n,s)=>e+(t=>{if(!0===t._$cssResult$)return t.cssText;if("number"==typeof t)return t;throw Error("Value passed to 'css' function must be a 'css' function result: "+t+". Use 'unsafeCSS' to pass non-literal values, but take care to ensure page security.")})(n)+t[s+1]),t[0]);return new s(o,e)},i=(e,n)=>{t?e.adoptedStyleSheets=n.map((t=>t instanceof CSSStyleSheet?t:t.styleSheet)):n.forEach((t=>{const n=document.createElement("style"),s=window.litNonce;void 0!==s&&n.setAttribute("nonce",s),n.textContent=t.cssText,e.appendChild(n)}))},S=t?t=>t:t=>t instanceof CSSStyleSheet?(t=>{let e="";for(const n of t.cssRules)e+=n.cssText;return o(e)})(t):t;export{s as CSSResult,i as adoptStyles,r as css,S as getCompatibleStyle,t as supportsAdoptingStyleSheets,o as unsafeCSS};
