A nostalgic minimal, slightly technical theme that evokes the feeling of early computing interfaces while maintaining modern usability and accessibility.

• Headings: Instrument Serif (Google Web Fonts) - Elegant, slightly humanistic serif for warmth
• Body Text: System monospace stack for technical authenticity
• Code/Data: Monospace for technical content and data display

// Primary - Muted technical grays and warm accents
--bg-primary: #f8f9fa        // Soft off-white background
--bg-secondary: #e9ecef      // Subtle gray for cards
--bg-tertiary: #dee2e6       // Light gray for inputs

--text-primary: #2d3748      // Dark gray for primary text
--text-secondary: #4a5568    // Medium gray for secondary text
--text-muted: #718096        // Light gray for muted text

--accent-primary: #d69e2e     // Warm amber for primary actions
--accent-secondary: #b7791f   // Darker amber for hover states
--accent-subtle: #faf089      // Light amber for subtle highlights

--border-default: #cbd5e0    // Default border color
--border-focus: #d69e2e      // Amber focus borders

// Status colors
--success: #38a169           // Muted green
--error: #e53e3e            // Muted red
--warning: #dd6b20          // Muted orange
--info: #3182ce             // Muted blue

• Container: Max-width 480px for mobile-first, intimate feel
• Spacing Scale: 4px base unit (4, 8, 12, 16, 24, 32, 48, 64)
• Border Radius: 4px for subtle roundness
• Borders: 1px solid borders throughout

• Background: --bg-secondary
• Border: 1px solid --border-default
• Padding: 24px
• Border radius: 4px
• Subtle drop shadow

• Input borders: 1px solid --border-default
• Focus state: 2px solid --accent-primary
• Monospace font for consistency
• Generous padding (12px)

• Primary: --accent-primary background, dark text
• Secondary: --bg-tertiary background, dark text
• Padding: 12px 24px
• Border radius: 4px
• Monospace font

• H1: 24px / text-2xl (primary headings)
• H2: 20px / text-xl (section headings)
• H3: 18px / text-lg (subsection headings)
• Body: 14px / text-sm (main content)
• Small: 12px / text-xs (captions, metadata)

Important: All headings using Instrument Serif (.font-heading) must be sized at text-2xl (24px) or larger to ensure proper readability and visual hierarchy. The serif font performs best at larger sizes and maintains the technical aesthetic when prominently displayed.

1. Functional Beauty: Every element serves a purpose
2. Technical Authenticity: Embrace monospace and structured layouts
3. Nostalgic Warmth: Subtle amber accents and serif headings
4. Accessibility First: High contrast, clear focus states
5. Mobile Responsive: Single-column layouts, touch-friendly sizing

• Use CSS custom properties for consistency
• Maintain semantic HTML structure
• Progressive enhancement approach
• Dark mode consideration for future iterations