improve the build system

scripts/countdown.js

@@ -0,0 +1,33 @@
+// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
+
+const target = new Date("May 7, 2025 16:30:00 GMT+0100");
+
+function update_time() {
+	let countdown = document.querySelector(".countdown");
+
+	const now = new Date();
+
+	if(now >= target) {
+		countdown.innerHTML = "Akce již proběhla.<br>Děkujeme všem za návštěvu.";
+		return;
+	}
+
+	const dur = Math.floor((target - now) / 1000);
+
+	const day = Math.floor(dur / 86400).toFixed(0).padStart(2, "0");
+	const hour = Math.floor((dur / 3600) % 24).toFixed(0).padStart(2, "0");
+	const min = Math.floor((dur / 60) % 60).toFixed(0).padStart(2, "0");
+	const sec = Math.floor(dur % 60).toFixed(0).padStart(2, "0");
+
+	//const targetdate = `${target.getDate()}. ${target.getMonth()+1}. ${target.getFullYear()}`
+	//const targettime = `${target.getHours()}:${target.getMinutes()}`
+
+	//countdown.innerHTML = `${targetdate} v ${targettime}<br><br>${day}:${hour}:${min}:${sec}`;
+	countdown.innerHTML = `${day}:${hour}:${min}:${sec}`;
+}
+
+update_time();
+setInterval(update_time, 1000);
+
+// @license-end
+

scripts/lang.js

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+// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
+
+function change_lang(base) {
+	let cz = document.querySelector(base + "_cz");
+	let en = document.querySelector(base + "_en");
+
+	if(cz.style.display == "none") {
+		cz.style.display = "";
+		en.style.display = "none";
+	} else {
+		cz.style.display = "none";
+		en.style.display = "";
+	}
+}
+
+// @license-end
+

scripts/theme.js

@@ -0,0 +1,34 @@
+// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
+
+function switch_theme() {
+	let el = document.documentElement;
+	if(el.getAttribute("data-color-scheme") === "invert") {
+		el.setAttribute("data-color-scheme", "normal");
+		localStorage.setItem("color-scheme", "normal");
+	} else {
+		el.setAttribute("data-color-scheme", "invert");
+		localStorage.setItem("color-scheme", "invert");
+	}
+}
+
+function switch_layout() {
+	let el = document.documentElement;
+	if(el.getAttribute("data-layout") === "wide") {
+		el.setAttribute("data-layout", "normal");
+		localStorage.setItem("layout", "normal");
+	} else {
+		el.setAttribute("data-layout", "wide");
+		localStorage.setItem("layout", "wide");
+	}
+}
+
+if(localStorage.getItem("color-scheme") === "invert") {
+	switch_theme();
+}
+
+if(localStorage.getItem("layout") === "wide") {
+	switch_layout();
+}
+
+// @license-end
+