Design System: Dark Portfolio Hero

1. Visual Theme & Atmosphere

Dark portfolio with animated loading screen (2.7s): counter 000→100 via rAF, rotating words with AnimatePresence, gradient progress bar (#89AACC to #4E85BF) with glow. Ideal for portfólios de desenvolvedores, designers criativos, freelancers fullstack, sites pessoais premium. AI-ready template.

• Density: 5/10 — Balanced
• Variance: 4/10 — Moderate
• Motion: 8/10 — Cinematic

2. Color Palette & Roles

• Preto Fundo (#0a0a0a) — Primary background surface
• Superfície (#141414) — Secondary surface or text color
• Texto (#f5f5f5) — Primary text color
• Muted (#888888) — Secondary text, borders, muted elements
• Acento (#f5f5f5) — Extended palette, decorative use
• Stroke (#1f1f1f) — Extended palette, decorative use
• Gradiente Azul from (#89AACC) — Secondary accent
• to (#4E85BF) — Extended palette, decorative use
• Glow (rgba(137,170,204,0.35)) — Extended palette, decorative use

3. Typography Rules

• Display / Hero: Inter — Weight 700, tight tracking, used for headline impact
• Accent: Instrument Serif — Used for decorative or emphasis text
• Body: Inter — Weight 400, 16px/1.6 line-height, max 72ch per line
• UI Labels / Captions: Inter — 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

4. Component Stylings

• 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.

5. Layout Principles

• 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).

6. Motion & Interaction

• Physics: Spring — stiffness 120, damping 20. Confident, weighted transitions.
• Entry animations: Fade + translate-Y (16px → 0) over 540ms ease-out. Staggered cascades for lists: 120ms 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.

7. Anti-Patterns (Banned)

• No emojis in UI — use icon system only (Lucide, Heroicons)
• No pure black (#000000) — use off-black or charcoal variants
• 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

Act as a Senior Frontend Engineer and Expert UI Designer. Your task is to code a complete Landing Page on the first attempt.

• Landing Page Theme:
• Sections to add:

Generate the final code immediately following these definitions:

Style

• Name: Dark Portfolio Hero
• Type: Portfolio, Loading Screen, GSAP Animations, HLS Video, Gradient Accent, Role Cycling
• Keywords: portfolio, loading screen, GSAP, HLS video, gradient accent azul, role cycling, Instrument Serif italic, Inter font, scroll indicator, counter animation, pill navbar
• Era: 2024-2026 Creative Portfolio Premium
• Light/Dark: ✗ Not Recommended / ✓ Full

Color Palette

• Primary: Preto Fundo #0a0a0a, Superfície #141414, Texto #f5f5f5, Muted #888888
• Secondary: Acento #f5f5f5, Stroke #1f1f1f, Gradiente Azul from #89AACC to #4E85BF, Glow rgba(137,170,204,0.35)

Visual Effects

VÍDEO: Stream HLS (~17s loop) com animação abstrata de fluido escuro. Ondas e gradientes orgânicos em tons de azul marinho profundo (#1a2a4a) e preto, com movimento suave e contínuo sem texto ou objetos. Aspect ratio ~2:1 (332x160px storyboard). Overlay preto 20% sutil e gradient fade inferior (h-48 from bg to transparent) fundem o vídeo no fundo #0a0a0a da página. Cria atmosfera contemplativa e premium para o portfólio. | EFEITOS CSS: Loading screen animado (2.7s): contador 000→100 via requestAnimationFrame, palavras rotativas (Design→Create→Inspire) com AnimatePresence, barra de progresso gradiente azul com glow, fade-out 0.6s. Hero com vídeo HLS de fundo (fluid/wave dark blue), overlay preto 20%, gradient fade inferior h-48. Pill navbar flutuante com logo gradiente azul ring 36x36px, links pill active state, botão Say hi com gradient border hover. Headline massiva Instrument Serif italic com GSAP entrance (y 50→0, 1.2s). Role cycling a cada 2s com fade-in. Scroll indicator com dot animado translateY loop 1.5s. Botões CTA com gradient border hover technique

AI Visual Direction

Design a dark portfolio with animated loading screen (2.7s): counter 000→100 via rAF, rotating words with AnimatePresence, gradient progress bar (#89AACC to #4E85BF) with glow. Hero with HLS video (dark fluid waves), 20% black overlay, bottom fade h-48. Floating pill navbar with gradient blue ring logo 36x36, pill links, gradient border hover. Massive headline Instrument Serif italic with GSAP y 50→0. Role cycling every 2s. Scroll indicator animated dot. CTA gradient border hover.

CSS Technical

font-family: 'Inter' / 'Instrument Serif' italic, --bg: #0a0a0a, --surface: #141414, --text: #f5f5f5, --stroke: #1f1f1f, gradient: linear-gradient(90deg, #89AACC, #4E85BF), video: HLS with bg-black/20, GSAP: power3.out y 50→0 1.2s, animation: scroll-down 1.5s infinite, loading: 2.7s counter + words + progress

Design System Variables

--bg: #0a0a0a, --surface: #141414, --text: #f5f5f5, --muted: #888888, --accent: #f5f5f5, --stroke: #1f1f1f, --gradient-accent: linear-gradient(90deg, #89AACC, #4E85BF), --glow: rgba(137,170,204,0.35), --font-body: 'Inter', --font-display: 'Instrument Serif', --loading-duration: 2.7s

Implementation Checklist

• ☐ Loading screen 2.7s contador + palavras rotativas
• ☐ Barra progresso gradiente azul glow
• ☐ Vídeo HLS fundo overlay 20%
• ☐ Gradient fade inferior h-48
• ☐ Pill navbar logo gradiente ring
• ☐ Headline Instrument Serif GSAP
• ☐ Role cycling 2s
• ☐ Scroll indicator dot animado
• ☐ Botões gradient border hover
• ☐ Responsivo

Execution Rules

1. Strictly follow the defined visual style.
2. Use high-quality inline SVG icons (Heroicons or Lucide style) — NEVER use emojis as icons.
3. Add cursor-pointer and smooth hover states (transition-all) on all interactive elements.
4. Required Page Structure:
   • Navbar (Logo + Links + CTA)
   • Hero Section (Impactful Headline + Subtitle + 2 buttons + 3D/Abstract visual element via CSS)
   • Features (3 cards with icons)
   • Testimonials (3 cards)
   • Pricing (3 tiers, highlight the middle one)
   • Final CTA
   • Full Footer with social links, privacy policy, terms of use, contact and SEO links.
5. All text content must be in English.
6. The visual must be CLEARLY distinct — do not create a "default Bootstrap" design. Force the use of the provided design system variables.
7. Use <style> tags in the head for custom classes (especially for complex backdrop-filter effects and animations) that Tailwind CDN doesn't cover.
8. Full Responsiveness: Layout must adapt perfectly to Mobile, Tablet and Desktop (vertical stack on mobile).
9. Include basic SEO, Viewport and Open Graph meta tags in <head>.
10. Footer must contain: Copyright 2026, Secondary navigation links and Social media icons.
11. Make the creative decisions needed to deliver the complete, functional result now.