--- version: "alpha" name: "Weblex Dark Hero" description: "Dark hero with full-screen video with seamless loop transition via requestAnimationFrame opacity. Ideal for website builders, plataformas no-code, ferramentas de criação de sites, landing pages de produto. AI-ready template." colors: primary: "#0A0A0A" secondary: "#1A1A2E" tertiary: "#00D4FF" neutral: "#FFFFFF" typography: h1: fontFamily: System UI stack fontSize: 2.25rem fontWeight: 700 body-md: fontFamily: System UI stack fontSize: 1rem fontWeight: 400 label-caps: fontFamily: System UI stack fontSize: 0.75rem fontWeight: 500 rounded: sm: 9999px md: 19998px lg: 29997px --- ## Overview Dark hero with full-screen video with seamless loop transition via requestAnimationFrame opacity. Ideal for website builders, plataformas no-code, ferramentas de criação de sites, landing pages de produto. AI-ready template. The dark hero with electric accent color is a direct descendant of the cyberpunk visual language that emerged in interface design around 2018-2019, when Stripe and Linear proved that near-black backgrounds with a single high-chroma accent could communicate both sophistication and technical credibility simultaneously. Before this shift, dark themes were treated as afterthoughts — inverted light modes with washed-out contrast. The deliberate pairing of deep charcoal with lime green specifically traces back to terminal aesthetics and hacker culture, repackaged for commercial SaaS through careful typographic hierarchy and cinematic motion. The video loop fade technique owes its popularity to the bandwidth explosion of the early 2020s. Once hero videos became feasible without destroying Core Web Vitals, designers discovered that a slow crossfade into darkness created depth without competing with foreground content. It's atmospheric, not informational — the video exists to establish mood, not to be watched. This particular combination — dark canvas, neon accent, ambient video — became the visual shorthand for 'we ship fast and our product is technical.' It works because it borrows credibility from developer tooling aesthetics while remaining accessible to non-technical buyers. - Density: 5/10 — Balanced - Variance: 4/10 — Moderate - Motion: 6/10 — Expressive - **Style:** Landing Page, Lime Green Accent, Video Loop Fade, CSS Variables HSL, Bottom-Aligned Content - **Keywords:** landing page, lime green, vídeo loop fade, CSS variables HSL, bottom-aligned, requestAnimationFrame, dark mode, ArrowUpRight, pill buttons, website builder - **Era:** 2024-2026 Website Builder Landing - **Light/Dark:** ✗ Not Recommended / ✓ Full ## Colors - Palette derived from style keywords and era context ## Typography - **Display / Hero:** System UI stack (-apple-system, sans-serif) — Weight 700, tight tracking, used for headline impact - **Body:** System UI stack (-apple-system, sans-serif) — Weight 400, 16px/1.6 line-height, max 72ch per line - **UI Labels / Captions:** System UI stack (-apple-system, sans-serif) — 0.875rem, weight 500, slight letter-spacing - **Monospace:** JetBrains Mono — Used for code, metadata, and technical values Scale: - Hero: clamp(2.5rem, 5vw, 4rem) - H1: 2.25rem - H2: 1.5rem - Body: 1rem / 1.6 - Small: 0.875rem ## Layout - **Grid:** CSS Grid primary. Max-width containment: 1280px centered with 1.5rem side padding. - **Spacing rhythm:** Balanced. Base unit: 0.5rem (8px). - **Section vertical gaps:** clamp(4rem, 8vw, 8rem). - **Hero layout:** Split-screen (text left, visual right). - **Feature sections:** Zig-zag alternating text+image rows. No 3-equal-columns. - **Mobile collapse:** All multi-column layouts collapse below 768px. No horizontal overflow. - **z-index contract:** base (0) / sticky-nav (100) / overlay (200) / modal (300) / toast (500). ## Elevation & Depth VÍDEO: Vídeo abstrato com movimento fluido e suave em tons escuros. Formas orgânicas ou gradientes em transição contínua, criando atmosfera moderna e tecnológica. Sem overlay escuro (opacity total). Implementa transição de loop seamless: fade-out para preto 1.5s antes do fim do vídeo e fade-in no primeiro 1s do restart, controlado via requestAnimationFrame para suavidade perfeita. | EFEITOS CSS: Vídeo de fundo tela cheia com transição de loop seamless: fade-out para preto 1.5s antes do fim via requestAnimationFrame, fade-in no primeiro 1s do restart, sem overlay escuro, conteúdo alinhado ao bottom com 100px bottom padding e max-width 603px, navbar transparente total, badge pill com borda, headline 62px line-height 1.1, botão primário verde lima com ArrowUpRight e secundário branco - **Physics:** Spring — stiffness 120, damping 20. Confident, weighted transitions. - **Entry animations:** Fade + translate-Y (16px → 0) over 480ms ease-out. Staggered cascades for lists: 100ms between items. - **Hover states:** Scale(1.03) + shadow lift over 200ms. - **Page transitions:** Fade + slide (300ms). - **Performance:** Only transform and opacity animated. No layout-triggering properties. ## Shapes Base corner radius: 9999px. See rounded tokens in front matter for the full scale. ## Components - **Primary Button:** Pill-shaped (9999px) shape. Accent color fill. Hover: 8% darken + subtle lift shadow. Active: -1px translate tactile press. Font weight 600. No outer glows. - **Secondary / Ghost Button:** Outline variant. 1.5px border in muted color. Text in primary color. Hover: subtle background fill. - **Cards:** Pill-shaped (9999px) corners. Surface background. Subtle shadow (0 2px 12px rgba(0,0,0,0.06)). 1px border stroke. - **Inputs:** Label above input. 1px border stroke. Focus ring: 2px accent color offset 2px. Error text below in semantic red. No floating labels. - **Navigation:** Primary surface background. Active item: accent color indicator. Font weight 500 when active. - **Skeletons:** Shimmer animation matching component dimensions. No circular spinners. - **Empty States:** Icon-based composition with descriptive text and action button. ## Do's and Don'ts - No emojis in UI — use icon system only (Lucide, Heroicons) - No pure white (#FFFFFF) backgrounds — use off-white or dark surfaces - No oversaturated accent colors (saturation cap: 80%) - No 3-column equal-width feature layouts — use zig-zag or asymmetric grid - No `h-screen` — use `min-h-[100dvh]` - No AI copywriting clichés: "Elevate", "Seamless", "Unleash", "Next-Gen" - No broken external image links — use picsum.photos or inline SVG - No generic lorem ipsum in demos - Do Vídeo tela cheia com loop fade seamless via rAF - Do Sem overlay escuro - Do Navbar transparente total - Do Conteúdo bottom-aligned 100px - Do Badge pill com borda - Do Headline 62px - Do Botão verde lima ArrowUpRight - Do Botão secundário branco - Do CSS variables HSL - Do Responsivo 3 breakpoints ## Use Case Website builders, Platforms no-code, Tools de criação de sites, Landing pages de produto