aranroig.com/frontend/app/components/parts/StickyHeader.vue

<script lang="js" setup>

import HeaderLinks from './HeaderLinks.vue';
import SiteOptions from './site_options/SiteOptions.vue';
import { ref, onMounted, onUnmounted } from 'vue';

const localePath = useLocalePath();

const SCROLL_THRESHOLD = 120;  // px from top before the bar can appear
const SCROLL_DELTA = 8;        // min px movement to register a direction (avoids jitter)

const props = defineProps({
    alwaysVisible: { type: Boolean, default: false }
});

const isVisible = ref(props.alwaysVisible);

let lastScrollY = 0;

function onScroll() {
    const currentY = window.scrollY;

    if (props.alwaysVisible) {
        isVisible.value = true;
        lastScrollY = currentY;
        return;
    }

    // Near the top the real header is visible, so keep the bar hidden.
    if (currentY <= SCROLL_THRESHOLD) {
        isVisible.value = false;
    } else if (currentY > lastScrollY + SCROLL_DELTA) {
        // scrolling down -> hide
        isVisible.value = false;
    } else if (currentY < lastScrollY - SCROLL_DELTA) {
        // scrolling up -> show
        isVisible.value = true;
    }

    lastScrollY = currentY;
}

onMounted(() => {
    lastScrollY = window.scrollY;
    window.addEventListener('scroll', onScroll, { passive: true });
});
onUnmounted(() => window.removeEventListener('scroll', onScroll));

</script>

<template>
<div class="tui-stickybar" :class="{ visible: isVisible }">
    <div class="sticky-inner">
        <div class="left">
            <NuxtLink :to="localePath('index')" class="sticky-title" aria-label="aranroig.com home">
                <img class="title-mark" src="/favicon.ico" alt="" aria-hidden="true" width="48" height="48" />
                <span class="title-text">ARANROIG.COM</span>
            </NuxtLink>
            <HeaderLinks />
        </div>
        <SiteOptions />
    </div>
</div>
</template>

<style lang="scss" scoped>

.tui-stickybar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;

    background: var(--color-sticky-header-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 0px 0px var(--color-container-shadow);

    // Respect notched / status-bar insets on mobile.
    padding-top: env(safe-area-inset-top);

    // Hidden state — translated up and invisible
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;

    transition:
        transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.3s ease;

    // Below 900px the full header is hidden, so keep the bar always shown.
    @media screen and (max-width: 900px) {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    &.visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
        transition:
            transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
            opacity 0.25s ease;
    }
}

.sticky-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 6px 24px;

    @media screen and (max-width: 900px) {
        padding: 5px 16px;
    }

    @media screen and (max-width: 800px) {
        padding: 6px 12px;
        gap: 0.5rem;

        // Compact the option dropdown buttons so they fit the slim bar.
        :deep(.site-options) {
            margin-top: 0;
            gap: 6px;
        }

        :deep(.menu-button) {
            padding: 5px 8px;
            font-size: 0.72rem;
            margin-right: 0;
        }
    }
}

.left {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;

    @media screen and (max-width: 800px) {
        gap: 0.5rem;
        flex: 1;
        justify-content: space-between;
    }

    // Keep the nav single-line and compact inside the sticky bar,
    // overriding the wrap layout used by the full page header.
    :deep(.tui-tabs) {
        @media screen and (max-width: 800px) {
            flex-wrap: nowrap;
            overflow-x: auto;
            max-width: 100%;
            scrollbar-width: none;

            &::-webkit-scrollbar {
                display: none;
            }
        }
    }

    :deep(.tui-tab) {
        @media screen and (max-width: 800px) {
            flex: 0 0 auto;
            min-height: 0;
            padding: 5px 7px;
            font-size: 0.7rem;
        }

        .tab-sep {
            @media screen and (max-width: 800px) {
                display: none;
            }
        }
    }
}

.sticky-title {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    font-family: 'Hurmit', monospace;
    font-size: 0.8rem;
    color: var(--color-text);
    letter-spacing: 1px;
    white-space: nowrap;

    .title-mark {
        display: block;
        width: 24px;
        height: 24px;
        image-rendering: pixelated;
        flex-shrink: 0;
        transform: translateY(-2px);
    }

    &:hover .title-text {
        color: var(--color-link);
    }

    @media screen and (max-width: 900px) {
        font-size: 0.75rem;
    }

    @media screen and (max-width: 480px) {
        .title-text {
            display: none;
        }

        .title-mark {
            width: 28px;
            height: 28px;
        }
    }
}

.site-options {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}
</style>