Improvements for xs screens

src/lib/style/app.scss

@@ -1,6 +1,4 @@
 @import '../node_modules/bootstrap/scss/functions';
-@import '../node_modules/bootstrap/scss/variables';
-@import '../node_modules/bootstrap/scss/variables-dark';
 
 //@import "@fontsource/antonio/latin-400.css";
 @import '@fontsource/ubuntu/latin-400.css';
@@ -14,6 +12,8 @@ $font-family-base: 'Ubuntu';
 $font-size-base: 0.9rem;
 $input-font-size-sm: $font-size-base * 0.875;
 
+@import '../node_modules/bootstrap/scss/variables';
+@import '../node_modules/bootstrap/scss/variables-dark';
 // $border-radius:               .675rem;
 
 @import '../node_modules/bootstrap/scss/mixins';
@@ -43,6 +43,40 @@ $input-font-size-sm: $font-size-base * 0.875;
 @import '../node_modules/bootstrap/scss/helpers';
 @import '../node_modules/bootstrap/scss/utilities/api';
 
+/* Default state (xs) - sticky */
+.sticky-xs-top {
+	position: sticky;
+	top: 0;
+	z-index: 1020;
+}
+
+@media (max-width: 576px) {
+	main {
+		margin-top: 25px;
+	}
+}
+
+/* Remove sticky behavior for larger screens */
+@media (min-width: 576px) {
+	.sticky-xs-top {
+		position: relative;
+	}
+}
+
+@include color-mode(dark) {
+	.navbar {
+		--bs-navbar-color: $light;
+		background-color: $dark;
+	}
+}
+
+@include color-mode(light) {
+	.navbar {
+		--bs-navbar-color: $dark;
+		background-color: $light;
+	}
+}
+
 nav {
 	margin-bottom: 15px;
 }

src/routes/+layout.svelte

@@ -12,6 +12,7 @@
 		NavbarBrand,
 		NavbarToggler
 	} from '@sveltestrap/sveltestrap';
+	import { _ } from 'svelte-i18n';
 
 	import { page } from '$app/stores';
 	import { locale, locales, isLoading } from 'svelte-i18n';
@@ -38,7 +39,7 @@
 			return flagMap[lowercaseCode];
 		} else {
 			// Return null for unsupported language codes
-			return null;
+			return flagMap['en'];
 		}
 	};
 
@@ -61,8 +62,23 @@
 	};
 </script>
 
-<Navbar expand="md">
-	<NavbarBrand>&#8383;TClock</NavbarBrand>
+<Navbar expand="md" sticky="xs-top" theme="auto">
+	<NavbarBrand class="d-none d-sm-block">&#8383;TClock</NavbarBrand>
+	<Nav class="d-md-none" pills>
+		<NavItem>
+			<NavLink href="#control" active>{$_('section.control.title', { default: 'Control' })}</NavLink
+			>
+		</NavItem>
+		<NavItem>
+			<NavLink href="#status">{$_('section.status.title', { default: 'Status' })}</NavLink>
+		</NavItem>
+		<NavItem>
+			<NavLink class="nav-link" href="#settings"
+				>{$_('section.settings.title', { default: 'Settings' })}</NavLink
+			>
+		</NavItem>
+	</Nav>
+
 	<NavbarToggler on:click={toggle} />
 
 	<Collapse {isOpen} navbar expand="sm">
@@ -94,4 +110,6 @@
 </Navbar>
 
 <!-- +layout.svelte -->
-<slot />
+<main>
+	<slot />
+</main>

src/routes/+page.svelte

@@ -3,6 +3,7 @@
 	import { screenSize, updateScreenSize } from '$lib/screen';
 
 	import { Container, Row, Toast, ToastBody } from '@sveltestrap/sveltestrap';
+	import { replaceState } from '$app/navigation';
 
 	import { onMount } from 'svelte';
 	import { writable } from 'svelte/store';
@@ -16,12 +17,6 @@
 		bgColor: '0'
 	});
 
-	// let uiSettings = writable({
-	// 	inputSize: 'sm',
-	// 	selectClass: '',
-	// 	btnSize: 'lg'
-	// });
-
 	let status = writable({
 		data: ['L', 'O', 'A', 'D', 'I', 'N', 'G'],
 		espFreeHeap: 0,
@@ -60,7 +55,43 @@
 			});
 	};
 
+	let sections: (HTMLElement | null)[];
+	let observer: IntersectionObserver;
+	const SM_BREAKPOINT = 576;
+
+	const setupObserver = () => {
+		if (window.innerWidth < SM_BREAKPOINT) {
+			observer = new IntersectionObserver(
+				(entries) => {
+					entries.forEach((entry) => {
+						if (entry.isIntersecting) {
+							const id = entry.target.id;
+							replaceState(`#${id}`);
+
+							// Update nav pills
+							document.querySelectorAll('.nav-link').forEach((link) => {
+								link.classList.remove('active');
+								if (link.getAttribute('href') === `#${id}`) {
+									link.classList.add('active');
+								}
+							});
+						}
+					});
+				},
+				{
+					threshold: 0.25 // Trigger when section is 50% visible
+				}
+			);
+
+			sections = ['control', 'status', 'settings'].map((id) => document.getElementById(id));
+
+			sections.forEach((section) => observer.observe(section!));
+		}
+	};
+
 	onMount(() => {
+		setupObserver();
+
 		fetchSettingsData();
 		fetchStatusData();
 
@@ -72,6 +103,11 @@
 		});
 
 		function handleResize() {
+			if (observer) {
+				observer.disconnect();
+			}
+			setupObserver();
+
 			updateScreenSize();
 		}
 
@@ -125,7 +161,9 @@
 <Container fluid>
 	<Row>
 		<Control bind:settings on:showToast={showToast} bind:status lg="3" xxl="4"></Control>
+
 		<Status bind:settings bind:status lg="6" xxl="4"></Status>
+
 		<Settings bind:settings on:showToast={showToast} on:formReset={fetchSettingsData} lg="3" xxl="4"
 		></Settings>
 	</Row>

src/routes/Control.svelte

@@ -105,8 +105,8 @@
 	export let xxl = xl;
 </script>
 
-<Col {xs} {sm} {md} {lg} {xl} {xxl}>
-	<Card>
+<Col {xs} {sm} {md} {lg} {xl} {xxl} class="mb-4 mb-xl-0">
+	<Card id="control">
 		<CardHeader>
 			<CardTitle>{$_('section.control.title', { default: 'Control' })}</CardTitle>
 		</CardHeader>

src/routes/Settings.svelte

@@ -221,8 +221,8 @@
 		systemIsOpen: boolean;
 </script>
 
-<Col {xs} {sm} {md} {lg} {xl} {xxl}>
-	<Card>
+<Col {xs} {sm} {md} {lg} {xl} {xxl} class="mb-4 mb-xl-0">
+	<Card id="settings">
 		<CardHeader>
 			<div class="float-end">
 				<small

src/routes/Status.svelte

@@ -104,8 +104,8 @@
 	export let xxl = xl;
 </script>
 
-<Col {xs} {sm} {md} {lg} {xl} {xxl}>
-	<Card>
+<Col {xs} {sm} {md} {lg} {xl} {xxl} class="mb-4 mb-xl-0">
+	<Card id="status">
 		<CardHeader>
 			<CardTitle>{$_('section.status.title', { default: 'Status' })}</CardTitle>
 		</CardHeader>