/* ========================================================================== NEXISTEK — Preloader The arrival curtain. Self-contained: every rule here is scoped to .preloader, and the whole thing is dormant unless carries `.is-loading` (set by boot.js before first paint, removed when the page is ready or when the boot failsafe fires). ========================================================================== */ .preloader { position: fixed; inset: 0; z-index: var(--z-preloader); display: grid; grid-template-rows: 1fr auto; align-items: center; justify-items: center; padding: var(--gutter); background: var(--c-void); color: var(--text-primary); /* Dormant by default — a no-JS document never sees it. */ visibility: hidden; opacity: 0; pointer-events: none; /* The lift: the curtain travels off the top, delayed just enough for the stage to have faded first, so the page is revealed and not wiped. */ transform: translate3d(0, -101%, 0); transition: transform var(--dur-cinematic) var(--ease-in-out) 220ms, visibility 0s linear calc(var(--dur-cinematic) + 220ms); } :root.is-loading .preloader { visibility: visible; opacity: 1; pointer-events: auto; transform: none; transition: none; } /* Nothing behind the curtain may scroll, and a reload must not restore the previous scroll position underneath it. */ :root.is-loading, :root.is-loading body { overflow: hidden; } /* Every other fixed layer stays out of the way until the curtain has gone. */ :root.is-loading .site-header, :root.is-loading .scroll-progress, :root.is-loading .skip-link { opacity: 0; transition: opacity var(--dur-base) var(--ease-out); } /* -------------------------------------------------------------------------- Field — the light the mark sits in -------------------------------------------------------------------------- */ .preloader__field { position: absolute; inset: 0; pointer-events: none; background: radial-gradient( 42rem 32rem at 50% 42%, rgb(var(--rgb-primary) / 0.16), transparent 68% ), radial-gradient( 28rem 24rem at 50% 100%, rgb(var(--rgb-accent) / 0.07), transparent 70% ); } /* A faint machined grid, so the void reads as a room rather than a hole. */ .preloader__field::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient( 90deg, rgb(var(--rgb-text) / 0.028) 1px, transparent 1px ), linear-gradient(rgb(var(--rgb-text) / 0.028) 1px, transparent 1px); background-size: 4.5rem 4.5rem; -webkit-mask-image: radial-gradient(60% 55% at 50% 45%, #000, transparent 75%); mask-image: radial-gradient(60% 55% at 50% 45%, #000, transparent 75%); } /* -------------------------------------------------------------------------- Stage — mark, wordmark, tagline -------------------------------------------------------------------------- */ .preloader__stage { position: relative; display: flex; flex-direction: column; align-items: center; gap: var(--sp-5); text-align: center; transition: opacity var(--dur-slow) var(--ease-in), transform var(--dur-slow) var(--ease-in); } /* Curtain leaving: the stage goes first, on its own, with no delay. */ :root:not(.is-loading) .preloader__stage { opacity: 0; transform: translate3d(0, -1.25rem, 0); } .preloader__mark { position: relative; display: grid; place-items: center; width: 8.5rem; height: 8.5rem; } .preloader__glyph { width: 3.75rem; height: auto; filter: drop-shadow(0 0 26px rgb(var(--rgb-primary) / 0.55)); animation: preloader-glyph 2.8s var(--ease-in-out) infinite; } .preloader__ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid var(--border-hairline); } /* One live arc per ring, counter-rotating — a machine spinning up. */ .preloader__ring::after { content: ""; position: absolute; inset: -1px; border-radius: 50%; border: 1px solid transparent; border-top-color: var(--c-primary); border-right-color: rgb(var(--rgb-accent) / 0.45); animation: preloader-spin 1.5s linear infinite; } .preloader__ring--slow { inset: 1.25rem; border-color: rgb(var(--rgb-text) / 0.05); } .preloader__ring--slow::after { border-top-color: transparent; border-bottom-color: rgb(var(--rgb-primary) / 0.6); animation-duration: 2.6s; animation-direction: reverse; } .preloader__brand { display: flex; gap: 0.18em; font-family: var(--font-display); font-size: clamp(1.75rem, 5.5vw, 2.75rem); font-weight: 500; letter-spacing: var(--tracking-widest); text-indent: var(--tracking-widest); /* offsets the trailing letter-space */ line-height: var(--lh-snug); } .preloader__brand > span { display: inline-block; opacity: 0; transform: translate3d(0, 0.6em, 0); animation: preloader-letter var(--dur-cinematic) var(--ease-out) forwards; animation-delay: calc(var(--i) * 70ms + 120ms); } .preloader__tagline { font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--text-tertiary); opacity: 0; animation: preloader-letter var(--dur-cinematic) var(--ease-out) 620ms forwards; } /* -------------------------------------------------------------------------- Meter — status, rail, counter -------------------------------------------------------------------------- */ .preloader__meter { position: relative; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: var(--sp-3) var(--sp-5); width: min(100%, var(--container-narrow)); padding-bottom: var(--sp-4); opacity: 0; animation: preloader-letter var(--dur-cinematic) var(--ease-out) 480ms forwards; } .preloader__status, .preloader__count { font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: var(--tracking-wide); text-transform: uppercase; } .preloader__status { color: var(--text-secondary); } .preloader__count { color: var(--text-energised); font-variant-numeric: tabular-nums; justify-self: end; } .preloader__count i { font-style: normal; opacity: 0.5; } .preloader__rail { grid-column: 1 / -1; grid-row: 2; position: relative; height: 2px; background: rgb(var(--rgb-text) / 0.09); overflow: hidden; } .preloader__fill { position: absolute; inset: 0; background: var(--gradient-energy); box-shadow: var(--glow-sm); transform: scaleX(0); transform-origin: left center; } /* -------------------------------------------------------------------------- Keyframes -------------------------------------------------------------------------- */ @keyframes preloader-spin { to { transform: rotate(360deg); } } @keyframes preloader-glyph { 0%, 100% { transform: scale(1); filter: drop-shadow(0 0 22px rgb(var(--rgb-primary) / 0.45)); } 50% { transform: scale(1.06); filter: drop-shadow(0 0 40px rgb(var(--rgb-primary) / 0.75)); } } @keyframes preloader-letter { to { opacity: 1; transform: none; } } /* -------------------------------------------------------------------------- Reduced motion — the curtain still holds the page, it just doesn't perform. -------------------------------------------------------------------------- */ @media (prefers-reduced-motion: reduce) { .preloader, .preloader__stage { transition-duration: 1ms; transition-delay: 0s; } .preloader__glyph, .preloader__ring::after { animation: none; } .preloader__brand > span, .preloader__tagline, .preloader__meter { opacity: 1; transform: none; animation: none; } } :root.is-low-motion .preloader__glyph, :root.is-low-motion .preloader__ring::after { animation: none; } :root.is-low-motion .preloader__brand > span, :root.is-low-motion .preloader__tagline, :root.is-low-motion .preloader__meter { opacity: 1; transform: none; animation: none; } /* -------------------------------------------------------------------------- Small screens -------------------------------------------------------------------------- */ @media (max-width: 30rem) { .preloader__mark { width: 6.5rem; height: 6.5rem; } .preloader__glyph { width: 3rem; } .preloader__ring--slow { inset: 0.9rem; } }