279 lines
11 KiB
Plaintext
279 lines
11 KiB
Plaintext
---
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import Wordmark from './Wordmark.astro';
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import { localePath, t, type Lang } from '../i18n/ui';
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interface Props { lang: Lang; tone?: 'paper' | 'night' }
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const { lang, tone = 'paper' } = Astro.props;
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const ui = t(lang);
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const home = localePath(lang, '/');
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const items = [
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{ href: `${home}#capabilities`, label: ui.nav.capabilities },
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{ href: localePath(lang, '/cipherverifier'), label: ui.nav.product },
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{ href: localePath(lang, '/insights'), label: ui.nav.insights },
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{ href: localePath(lang, '/team'), label: ui.nav.team },
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];
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const contactHref = `${home}#contact`;
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const path = Astro.url.pathname.replace(/\/$/, '') || '/';
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const isCurrent = (href: string) => href.split('#')[0] === path && !href.includes('#');
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---
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<header class="header" data-header data-tone={tone} data-tone-init>
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<div class="container header__shell">
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<div class="header__bar hud-frame">
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<a class="header__home" href={home} aria-label={ui.nav.homeLabel}>
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<Wordmark inline class="header__logo header__logo--paper" />
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<Wordmark inline light class="header__logo header__logo--night" />
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</a>
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<nav class="header__nav hud-frame" aria-label="Primary" id="primary-nav">
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<ul class="header__list" role="list">
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{items.map((item) => {
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const current = isCurrent(item.href);
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return (
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<li><a class:list={[{ 'hud-corners': current }]} href={item.href} aria-current={current ? 'page' : undefined}>{item.label}</a></li>
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);
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})}
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<li class="header__contact-mobile"><a href={contactHref}>{ui.nav.contact}</a></li>
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</ul>
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</nav>
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<a class="header__contact" href={contactHref}>{ui.nav.contact}</a>
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<button class="header__toggle" type="button" aria-expanded="false" aria-controls="primary-nav" data-nav-toggle>
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<span data-label-open>{ui.nav.menu}</span>
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<span data-label-close hidden>{ui.nav.close}</span>
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</button>
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</div>
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</div>
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</header>
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<style>
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/* The header is a transparent sticky strip; the bar floats inside it with room on every side
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for the corner crosses. Only the bar takes pointer events, so the margin never blocks clicks. */
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.header {
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position: sticky;
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top: 0;
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z-index: 20;
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pointer-events: none;
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}
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.header__shell {
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padding-block: var(--space-3);
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transition:
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max-width var(--dur-slow) var(--ease),
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padding var(--dur-slow) var(--ease);
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}
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/* Once the page scrolls, the bar docks: full width, flush to the top, and as tall as the header
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so nothing below moves. Its outer crosses would sit off-screen (and the side ones would make
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the page scroll sideways), so they go, with the top and side borders; the bottom line stays. */
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.header[data-scrolled] .header__shell {
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max-width: 100%;
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padding: 0;
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}
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.header[data-scrolled] .header__bar {
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min-height: var(--header-height);
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border-width: 0 0 var(--line);
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}
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.header[data-scrolled] .header__bar::after { content: none; }
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.header__bar {
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pointer-events: auto;
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isolation: isolate;
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display: flex;
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align-items: stretch;
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min-height: calc(var(--header-height) - 2 * var(--space-3));
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color: var(--ink-base);
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font-family: var(--font-mono);
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font-size: var(--step-micro);
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font-weight: var(--weight-medium);
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line-height: 1;
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letter-spacing: var(--track-caps);
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text-transform: uppercase;
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transition:
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color var(--dur) var(--ease),
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border-color var(--dur) var(--ease),
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min-height var(--dur-slow) var(--ease);
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}
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/* The glass sits on a pseudo-element rather than the bar itself: a backdrop-filter on the bar
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would make it a backdrop root, and the mobile panel inside it could then blur nothing. */
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.header__bar::before,
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.header__nav[data-open]::before {
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content: '';
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position: absolute;
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inset: 0;
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z-index: -1;
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background: var(--glass-solid);
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transition: background-color var(--dur) var(--ease);
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}
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/* Until the script has settled the tone on load, it changes without a fade: the tone is a fact
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about where the page is, not a change the visitor made. */
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.header[data-tone-init],
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.header[data-tone-init] *,
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.header[data-tone-init] ::before,
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.header[data-tone-init] ::after { transition: none !important; }
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@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
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.header__bar::before,
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.header__nav[data-open]::before {
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background: var(--glass);
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-webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
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backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
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}
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}
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/* Over a night section the bar takes the night tone. */
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.header[data-tone='night'] { --hud-line: var(--hud-line-on-night); }
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.header[data-tone='night'] .header__bar { color: var(--ink-on-night); }
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.header[data-tone='night'] .header__bar::before,
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.header[data-tone='night'] .header__nav[data-open]::before { background: var(--glass-solid-on-night); }
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@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
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.header[data-tone='night'] .header__bar::before,
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.header[data-tone='night'] .header__nav[data-open]::before { background: var(--glass-on-night); }
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}
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.header__home {
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display: flex;
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align-items: center;
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padding-inline: var(--space-4);
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text-decoration: none;
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}
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.header__home :global(.header__logo--night),
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.header[data-tone='night'] .header__home :global(.header__logo--paper) { display: none; }
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.header[data-tone='night'] .header__home :global(.header__logo--night) { display: block; }
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/* Cells: every item is a full-height cell, divided from its neighbour by one frame line. */
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.header__nav { margin-left: auto; display: flex; }
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/* On desktop the nav is just a run of cells inside the bar: no frame of its own. */
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.header__nav.hud-frame { border: 0; }
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.header__nav.hud-frame::after { content: none; }
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.header__list { display: flex; }
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.header__list li { display: flex; border-left: var(--line) solid var(--frame-color); }
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.header__list a,
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.header__contact,
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.header__toggle {
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display: flex;
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align-items: center;
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padding-inline: var(--space-4);
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text-decoration: none;
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transition: background-color var(--dur-fast) var(--ease);
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}
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.header__list a:hover,
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.header__toggle:hover { background: color-mix(in srgb, currentColor var(--tint-hover), transparent); }
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.header__list a[aria-current='page'] { background: color-mix(in srgb, currentColor var(--tint-active), transparent); }
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.header__contact {
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border-left: var(--line) solid var(--frame-color);
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background: var(--ink-base);
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color: var(--paper);
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}
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.header__contact:hover { background: var(--ink-muted-base); }
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.header[data-tone='night'] .header__contact { background: var(--paper); color: var(--night); }
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.header[data-tone='night'] .header__contact:hover { background: var(--paper-deep); }
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.header__list .header__contact-mobile { display: none; }
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.header__toggle {
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display: none;
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border-left: var(--line) solid var(--frame-color);
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text-transform: inherit;
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letter-spacing: inherit;
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}
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/* Focus ring drawn inside the cell, so it never collides with the frame lines. */
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.header__bar :focus-visible {
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outline-offset: calc(-1 * var(--space-1));
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border-radius: 0;
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}
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/* A panel left open across a resize to desktop must not paint a second glass layer. */
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@media (min-width: 48rem) {
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.header__nav[data-open]::before { content: none; }
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}
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@media (max-width: 47.99rem) {
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.header__contact { display: none; }
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.header__list .header__contact-mobile { display: flex; }
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.header__toggle { display: flex; margin-left: auto; }
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.header__nav {
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position: absolute;
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top: calc(100% + var(--space-3));
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left: calc(-1 * var(--line));
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right: calc(-1 * var(--line));
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display: none;
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}
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/* As the mobile panel it is a full .hud-frame: border and corner crosses. */
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.header__nav.hud-frame { border: var(--line) solid var(--frame-color); }
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.header__nav.hud-frame::after { content: ''; }
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.header__nav[data-open] { display: block; }
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/* Docked: the panel hangs straight off the bar's bottom line, edge to edge. */
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.header[data-scrolled] .header__nav {
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top: calc(100% + var(--line));
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border-width: 0 0 var(--line);
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}
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.header[data-scrolled] .header__nav.hud-frame::after { content: none; }
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.header__list { flex-direction: column; }
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.header__list li { border-left: 0; }
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.header__list li + li { border-top: var(--line) solid var(--frame-color); }
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.header__list a {
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flex: 1;
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padding-block: var(--space-4);
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font-size: var(--step-small);
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}
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}
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</style>
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<script>
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const header = document.querySelector<HTMLElement>('[data-header]');
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const toggle = header?.querySelector<HTMLButtonElement>('[data-nav-toggle]');
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const nav = header?.querySelector<HTMLElement>('#primary-nav');
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if (header && toggle && nav) {
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const open = toggle.querySelector<HTMLElement>('[data-label-open]')!;
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const close = toggle.querySelector<HTMLElement>('[data-label-close]')!;
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const set = (isOpen: boolean) => {
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toggle.setAttribute('aria-expanded', String(isOpen));
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if (isOpen) nav.setAttribute('data-open', ''); else nav.removeAttribute('data-open');
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open.hidden = isOpen;
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close.hidden = !isOpen;
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};
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toggle.addEventListener('click', () => set(toggle.getAttribute('aria-expanded') !== 'true'));
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document.addEventListener('keydown', (e) => { if (e.key === 'Escape') set(false); });
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nav.addEventListener('click', (e) => { if ((e.target as HTMLElement).closest('a')) set(false); });
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}
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/* Scrolled: a one-pixel marker at the very top of the document; once it leaves the viewport
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the page has scrolled. An IntersectionObserver, so nothing runs on scroll. */
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if (header && 'IntersectionObserver' in window) {
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const marker = document.createElement('div');
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marker.setAttribute('aria-hidden', 'true');
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marker.style.cssText = 'position:absolute;top:0;left:0;width:1px;height:1px;pointer-events:none;';
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document.body.prepend(marker);
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new IntersectionObserver(([entry]) => {
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header.toggleAttribute('data-scrolled', !entry.isIntersecting);
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}).observe(marker);
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}
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/* Tone: watch a one-pixel line through the middle of the bar and switch to night while a
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.night section crosses it. An IntersectionObserver, so nothing runs on scroll. */
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const sections = document.querySelectorAll<HTMLElement>('.night');
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// Transitions come back once the first tone is drawn (two frames, so it has been painted).
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const settle = () => requestAnimationFrame(() => requestAnimationFrame(() => header?.removeAttribute('data-tone-init')));
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if (header && sections.length && 'IntersectionObserver' in window) {
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const under = new Set<Element>();
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let observer: IntersectionObserver | undefined;
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const watch = () => {
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observer?.disconnect();
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under.clear();
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const mid = Math.round(header.offsetHeight / 2);
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observer = new IntersectionObserver((entries) => {
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for (const entry of entries) {
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if (entry.isIntersecting) under.add(entry.target); else under.delete(entry.target);
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}
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header.dataset.tone = under.size ? 'night' : 'paper';
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if (header.hasAttribute('data-tone-init')) settle();
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}, { rootMargin: `-${mid}px 0px -${window.innerHeight - mid - 1}px 0px` });
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sections.forEach((section) => observer!.observe(section));
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};
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watch();
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let resize: number | undefined;
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window.addEventListener('resize', () => {
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window.clearTimeout(resize);
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resize = window.setTimeout(watch, 150);
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});
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} else {
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settle();
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}
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</script>
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