408 lines
11 KiB
Svelte
408 lines
11 KiB
Svelte
<script lang="ts">
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import { page as pageState } from '$app/state';
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import Wordmark from './Wordmark.svelte';
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const path = $derived(pageState.url?.pathname ?? '/');
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/** Page slug for body class: "page-home" | "page-services" | "page-services-hands-on-saas-architecture-consultant" etc. Set at build time per route; no client JS. */
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const bodyClass = $derived(
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path === '/'
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? 'page-home'
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: 'page-' + path.replace(/^\/|\/$/g, '').replace(/\//g, '-'),
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);
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interface NavigationItem {
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label: string;
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href: string;
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umamiEventLabel: string;
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}
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const { items = [], page }: { items: NavigationItem[]; page: string } = $props();
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</script>
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<nav id="nav" class="nav" aria-label="Main navigation">
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<input
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type="checkbox"
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id="nav-toggle"
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class="nav-toggle-input"
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aria-hidden="true"
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hidden
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/>
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<div class="mobile-nav-header">
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<span
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class={['mobile nav-header-logo', { 'page-home': bodyClass === 'page-home' }]}
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>
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<Wordmark />
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</span>
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<button
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type="button"
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id="nav-toggle-button"
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class="btn-clear"
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aria-controls="nav-menu"
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aria-label="Toggle navigation"
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aria-expanded="false"
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>
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<label
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id="nav-toggle-label"
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for="nav-toggle"
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class="nav-toggle"
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role="presentation"
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>
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<span class="nav-toggle-inner">
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<span class="nav-toggle-line"></span>
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<span class="nav-toggle-line"></span>
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<span class="nav-toggle-line"></span>
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</span>
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</label>
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</button>
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</div>
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<div id="nav-menu" class="nav-menu container">
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<span
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class={[
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'nav-header-logo desktop',
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{ 'page-home': bodyClass === 'page-home' },
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]}
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>
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{#if page !== 'home'}
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<a href="/">
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<Wordmark />
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<span class="sr-only">mifi Ventures home page</span>
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</a>
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{:else}
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<Wordmark />
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{/if}
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</span>
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<ul class="nav-list">
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{#each items as item (item.href)}
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<li class="nav-item">
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<a
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href={item.href}
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class="nav-link"
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data-umami-event="navigation"
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data-umami-event-label={item.umamiEventLabel}
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data-umami-event-page={page}
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>
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{item.label}
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</a>
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</li>
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{/each}
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</ul>
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<div class="nav-item nav-back-to-top">
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<a
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href="#header"
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class="nav-link"
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data-umami-event="navigation"
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data-umami-event-label="back to top">Back to top</a
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>
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</div>
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</div>
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</nav>
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<style>
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.nav {
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background-color: var(--color-bg);
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background-color: var(--color-bg);
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border-bottom: 1px solid var(--color-border);
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padding-top: var(--space-sm);
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position: sticky;
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text-align: center;
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top: 0;
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z-index: 100;
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@media (max-width: 768px) {
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align-items: stretch;
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display: flex;
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flex-direction: column;
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padding: var(--space-md) 0;
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}
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}
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.container,
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.nav-menu {
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display: grid;
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grid-template-columns: 1fr auto 1fr;
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justify-content: space-between;
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align-items: center;
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}
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.mobile-nav-header {
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anchor-name: --mobile-nav-header;
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display: none;
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justify-content: space-between;
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align-items: center;
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@media (max-width: 768px) {
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display: flex;
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}
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}
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.nav-header-logo {
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color: var(--color-text);
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display: inline-block;
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max-width: 250px;
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padding-left: var(--space-md);
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&.mobile {
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display: none;
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}
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@media (max-width: 768px) {
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&.desktop {
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display: none;
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}
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&.mobile {
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display: inline-block;
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}
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}
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}
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/* Hamburger toggle: mobile only, animates to X when open */
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.nav-toggle-input {
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position: absolute;
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width: 1px;
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height: 1px;
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padding: 0;
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margin: -1px;
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overflow: hidden;
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clip: rect(0, 0, 0, 0);
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white-space: nowrap;
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border: 0;
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&:checked {
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& ~ .mobile-nav-header .nav-toggle .nav-toggle-line {
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&:nth-child(1) {
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transform: translateY(8px) rotate(45deg);
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}
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&:nth-child(2) {
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opacity: 0;
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}
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&:nth-child(3) {
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transform: translateY(-8px) rotate(-45deg);
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}
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}
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& ~ .nav-menu {
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max-height: 80vh;
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opacity: 1;
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padding-top: var(--space-md);
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padding-bottom: var(--space-md);
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border-top: 1px solid var(--color-border);
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}
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}
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}
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.btn-clear {
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background: transparent;
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border: none;
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padding: 0;
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margin: 0;
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cursor: pointer;
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}
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.nav-toggle {
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display: none;
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align-items: center;
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justify-content: flex-end;
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flex: 0 0 auto;
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padding: var(--space-sm) var(--space-md);
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width: calc(24px + var(--space-md) + var(--space-md));
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height: calc(31px + var(--space-sm) + var(--space-sm));
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cursor: pointer;
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color: var(--color-text);
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background: transparent;
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border: none;
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border-radius: var(--space-xs);
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transition:
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color 0.2s ease,
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background-color 0.2s ease;
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@media (max-width: 768px) {
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display: flex;
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}
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&:hover {
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color: var(--color-primary);
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}
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&:focus-visible {
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outline: 4px solid var(--color-focus);
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outline-offset: 4px;
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}
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}
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.nav-toggle-inner {
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display: flex;
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flex-direction: column;
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justify-content: space-between;
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width: 24px;
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height: 18px;
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}
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.nav-toggle-line {
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display: block;
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width: 100%;
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height: 2px;
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background-color: currentColor;
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border-radius: 1px;
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transform-origin: center;
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transition:
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transform 0.25s ease,
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opacity 0.2s ease;
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@media (prefers-reduced-motion: reduce) {
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transition-duration: 0.01ms;
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}
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}
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.nav-list {
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display: flex;
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justify-content: space-between;
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align-items: center;
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list-style: none;
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padding: 0;
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margin: 0;
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}
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.nav-item {
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margin: 0 var(--space-md);
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}
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/* Back to top + mobile nav logo: hidden until page is scrolled (CSS scroll-driven animation) */
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.nav-back-to-top,
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.nav-header-logo.page-home {
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/* Fallback when scroll-driven animations aren’t supported: always visible */
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opacity: 1;
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visibility: visible;
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}
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/* Mobile: show toggle, collapse menu until opened; menu overlays content via anchor */
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@media (max-width: 768px) {
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.nav-menu {
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display: flex;
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flex-direction: column;
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align-items: stretch;
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max-height: 0;
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overflow: hidden;
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opacity: 0;
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padding-top: 0;
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padding-bottom: 0;
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border-top: none;
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transition:
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max-height 0.3s ease,
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opacity 0.25s ease,
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padding 0.25s ease;
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& .nav-list,
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& .nav-item {
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width: 100%;
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}
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& .nav-list {
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flex-direction: column;
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gap: 0;
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}
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& .nav-item {
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margin: 0;
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text-align: center;
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& a:hover {
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border-bottom-color: transparent;
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}
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}
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& .nav-item a,
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& .nav-back-to-top a {
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display: block;
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padding: var(--space-md);
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}
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@supports (top: anchor(bottom)) {
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position: fixed;
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position-anchor: --mobile-nav-header;
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top: anchor(--mobile-nav-header bottom);
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left: anchor(--mobile-nav-header left);
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right: anchor(--mobile-nav-header right);
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margin: 0;
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overflow-y: auto;
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background-color: var(--color-bg);
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border-bottom: 1px solid var(--color-border);
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box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
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z-index: 99;
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}
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@media (prefers-reduced-motion: reduce) {
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transition-duration: 0.01ms;
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}
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}
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}
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@supports (animation-timeline: scroll()) {
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/* Shadow on pseudo-element; only opacity is animated (composited) */
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.nav::after {
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content: '';
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position: absolute;
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inset: 0;
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box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
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pointer-events: none;
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opacity: 0;
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animation: nav-shadow-on-scroll linear;
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animation-timeline: scroll(root block);
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animation-range: 0 100px;
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animation-fill-mode: both;
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will-change: opacity;
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}
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@keyframes nav-shadow-on-scroll {
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from {
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opacity: 0;
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}
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to {
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opacity: 1;
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}
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}
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@media (prefers-reduced-motion: reduce) {
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.nav::after {
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animation: none;
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opacity: 1;
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}
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}
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/* Composited-only animation: opacity only (visibility/pointer-events not animated) */
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.nav-back-to-top,
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.nav-header-logo.page-home {
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opacity: 0;
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animation: nav-reveal-on-scroll linear;
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animation-timeline: scroll(root block);
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animation-range: 300px 400px;
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animation-fill-mode: both;
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will-change: opacity;
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}
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@keyframes nav-reveal-on-scroll {
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from {
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opacity: 0;
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}
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to {
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opacity: 1;
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}
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}
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@media (prefers-reduced-motion: reduce) {
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.nav-back-to-top,
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.nav-header-logo {
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animation: none;
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opacity: 1;
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visibility: visible;
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pointer-events: auto;
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}
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}
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}
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</style>
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