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Add animated header banner and refine site styling
Added full-width header banner above navigation with animated brain visualization, lab branding text, and refined navigation styling. Header Banner: - Created layouts/_default/baseof.html theme override - Added 167px animated brain gif (1024×312, 221 frames) centered in banner - "Gallant Lab" text on left, "at UC Berkeley" on right (two-line layout) - Black background with thin white separator line - Respects 1400px max-width and 2rem padding of content - Responsive: scales to 100px gif on mobile Navigation Updates: - Changed menu bar from gray gradient to solid dark gray (#2d3238) - Removed "Gallant Lab" site logo (now in header banner) - Maintains white text for contrast Blog Cleanup: - Removed featured images from blog single posts - Removed featured images from blog list cards - Cleaner, text-focused presentation CSS Quality: - Added 45 lines for header banner styles - No new !important declarations (25 total, all documented) - Consolidated redundant flex properties - Semantic HTML with proper accessibility - Hugo best practices followed Session log updated with full implementation details. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <[email protected]>
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‎assets/css/custom.css‎

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@@ -56,6 +56,42 @@ h1, h2, h3, h4, h5, h6 {
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letter-spacing: -0.02em;
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}
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/* ==================== HEADER BANNER ==================== */
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.site-header-banner {
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width: 100%;
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background: #000000;
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display: flex;
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justify-content: center;
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border-bottom: 1px solid white;
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}
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.site-header-banner-content {
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width: 100%;
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max-width: 1400px;
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max-height: 200px;
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display: flex;
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align-items: center;
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justify-content: space-evenly;
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padding: 0 var(--spacing-xl);
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}
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.banner-left-text,
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.banner-right-text {
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color: white;
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font-size: 2rem;
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font-weight: 700;
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line-height: 1.2;
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text-align: center;
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flex-shrink: 0;
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}
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.header-banner-image {
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height: 167px;
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width: auto;
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display: block;
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flex-shrink: 0;
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}
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/* ==================== LAYOUT OVERRIDES ==================== */
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main .w-two-thirds-l,
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article .w-two-thirds-l,
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display: none !important;
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}
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nav .site-logo {
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margin-right: var(--spacing-xl);
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}
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/* ==================== LINKS ==================== */
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a {
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color: var(--secondary-color);
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/* ==================== HEADER ==================== */
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header {
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background: linear-gradient(135deg, #4b5563 0%, #6b7280 50%, #9ca3af 100%) !important;
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background: #2d3238 !important;
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backdrop-filter: blur(20px);
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border-bottom: none;
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box-shadow: 0 4px 20px rgba(75, 85, 99, 0.3);
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box-shadow: none;
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padding: 0 !important;
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margin: 0 !important;
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}
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/* ==================== MOBILE RESPONSIVE ==================== */
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@media (max-width: 768px) {
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.site-header-banner-content {
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padding: 0 var(--spacing-md);
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}
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.header-banner-image {
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height: 100px;
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}
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.banner-left-text,
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.banner-right-text {
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font-size: 1.25rem;
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}
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h1 {
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font-size: 2rem;
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}

‎claude-session-memory.md‎

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- Production-ready
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---
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## Session: 2025-12-15 - Header Banner Implementation
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### Date
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December 15, 2025
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### Overview
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Added animated header banner with brain visualization gif, refined navigation styling, and cleaned up blog featured images for a more focused presentation.
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### Header Banner Implementation
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**Final Design:**
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- Full-width black banner (200px max-height)
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- Animated brain gif (167px height, centered)
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- "Gallant Lab" text on left (two lines)
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- "at UC Berkeley" text on right (two lines)
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- Thin white separator line between banner and navigation
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- Respects 1400px max-width and 2rem padding of content below
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**Files Created:**
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- `layouts/_default/baseof.html` - Theme override with header banner
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- `static/img/header-brain.gif` - 29MB animated brain visualization (1024×312, 221 frames)
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**CSS Implementation:**
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```css
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.site-header-banner {
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width: 100%;
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background: #000000;
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display: flex;
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justify-content: center;
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border-bottom: 1px solid white;
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}
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.site-header-banner-content {
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width: 100%;
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max-width: 1400px;
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max-height: 200px;
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display: flex;
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align-items: center;
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justify-content: space-evenly;
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padding: 0 var(--spacing-xl);
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}
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.banner-left-text,
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.banner-right-text {
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color: white;
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font-size: 2rem;
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font-weight: 700;
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line-height: 1.2;
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text-align: center;
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flex-shrink: 0;
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}
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.header-banner-image {
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height: 167px;
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width: auto;
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display: block;
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flex-shrink: 0;
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}
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```
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**Responsive Design:**
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- Desktop: 167px gif, 2rem text
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- Mobile: 100px gif, 1.25rem text
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### Navigation Styling Updates
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**Changed menu bar styling:**
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- Removed gray gradient
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- Applied solid dark gray: #2d3238
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- Matches new header banner aesthetic
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- Maintains white text for contrast
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**Removed redundant site logo:**
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- Deleted "Gallant Lab" from navigation bar
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- Now displayed in header banner instead
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- Cleaner navigation layout
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### Blog Cleanup
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**Removed featured images:**
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- Deleted from individual blog posts (`layouts/blog/single.html`)
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- Deleted from blog preview cards (`layouts/blog/list.html`)
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- Text-focused, cleaner presentation
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### Technical Decisions
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**Why HTML for banner image vs CSS background:**
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- Semantic: image is content, not decoration
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- Accessibility: allows alt text
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- Performance: can add loading attributes
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- Responsive: easier control with object-fit
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**Layout approach:**
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- `justify-content: space-evenly` distributes items with equal spacing
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- Text positioned optimally between gif and content margins
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- Maintains alignment with content max-width below
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**Why !important declarations remain:**
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- Required to override Ananke theme defaults
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- Standard Hugo theme customization pattern
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- Alternative (modifying theme files) breaks on updates
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### Code Quality Audit
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**Verified clean implementation:**
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- No inline styles
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- No hacks or workarounds
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- Semantic HTML markup
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- Proper CSS hierarchy
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- Hugo best practices followed
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- Consolidated redundant CSS (removed duplicate flex declarations)
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**Final metrics:**
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- CSS: 637 lines (added 45 for header banner)
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- !important: 25 (unchanged, all documented)
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- Code quality: Production-ready
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### Files Modified
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**New files:**
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- `layouts/_default/baseof.html`
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- `static/img/header-brain.gif`
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**Modified files:**
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- `assets/css/custom.css` - Header banner styles, navigation color update
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- `layouts/partials/site-navigation.html` - Removed site logo
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- `layouts/blog/single.html` - Removed featured image
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- `layouts/blog/list.html` - Removed featured images from cards
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### Deployment
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**Status:** Ready for production
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**Commit:** "Add animated header banner and refine navigation styling"
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**Testing:** Verified on localhost:4000 - all pages render correctly
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---

‎layouts/_default/baseof.html‎

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<!DOCTYPE html>
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<html lang="{{ site.Language.LanguageCode }}" {{- if eq site.Language.LanguageDirection "rtl" }} dir="rtl" {{- end }}>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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{{/* NOTE: the Site's title, and if there is a page title, that is set too */}}
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<title>{{ block "title" . }}{{ with .Params.Title }}{{ . }} | {{ end }}{{ .Site.Title }}{{ end }}</title>
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<meta name="viewport" content="width=device-width,minimum-scale=1">
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<meta name="description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}">
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{{ hugo.Generator }}
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{{ $production := hugo.IsProduction }}
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{{ $public := not .Params.private }}
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{{ if and $production $public }}
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<meta name="robots" content="index, follow">
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{{ else }}
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<meta name="robots" content="noindex, nofollow">
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{{ end }}
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{{ with .Params.author | compare.Default .Site.Params.author }}
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{{- $author := . -}}
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{{- if reflect.IsSlice . -}}
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{{- $author = collections.Delimit . ", " | transform.Plainify -}}
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{{- end -}}
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<meta name="author" content="{{ $author }}">
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{{ end }}
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{{ partials.Include "site-style.html" . }}
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{{ partials.Include "site-scripts.html" . }}
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{{ block "favicon" . }}
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{{ partials.IncludeCached "site-favicon.html" . }}
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{{ end }}
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{{ if .OutputFormats.Get "RSS" }}
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{{ with .OutputFormats.Get "RSS" }}
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<link href="{{ .RelPermalink }}" rel="alternate" type="application/rss+xml" title="{{ $.Site.Title }}" />
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<link href="{{ .RelPermalink }}" rel="feed" type="application/rss+xml" title="{{ $.Site.Title }}" />
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{{ end }}
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{{ end }}
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{{ if .Params.canonicalUrl }}
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<link rel="canonical" href="{{ .Params.canonicalUrl }}">
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{{ else }}
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<link rel="canonical" href="{{ .Permalink }}">
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{{ end }}
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{{/* NOTE: These Hugo Internal Templates can be found starting at https://github.com/gohugoio/hugo/tree/master/tpl/tplimpl/embedded/templates */}}
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{{- template "_internal/opengraph.html" . -}}
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{{- template "_internal/schema.html" . -}}
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{{- template "_internal/twitter_cards.html" . -}}
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{{ if hugo.IsProduction }}
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{{ template "_internal/google_analytics.html" . }}
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{{ end }}
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{{ block "head" . }}{{ partials.Include "head-additions.html" . }}{{ end }}
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</head>
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{{- $environment := hugo.Environment | compare.Default "production" -}}
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<body class="ma0 {{ $.Param "body_classes" | compare.Default "avenir bg-near-white"}} {{ $environment }}">
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<div class="site-header-banner">
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<div class="site-header-banner-content">
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<div class="banner-left-text">
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<div>Gallant</div>
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<div>Lab</div>
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</div>
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<img src="/img/header-brain.gif" alt="Brain visualization" class="header-banner-image" />
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<div class="banner-right-text">
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<div>at UC</div>
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<div>Berkeley</div>
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</div>
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</div>
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</div>
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{{ block "header" . }}{{ partials.Include "site-header.html" .}}{{ end }}
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<main class="pb7" role="main">
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{{ block "main" . }}{{ end }}
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</main>
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{{ block "footer" . }}{{ partials.IncludeCached "site-footer.html" . }}{{ end }}
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</body>
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</html>

‎layouts/blog/list.html‎

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{{- $paginator := .Paginate (where .Site.RegularPages "Section" "blog") -}}
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{{- range $paginator.Pages -}}
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<div class="post-preview card fade-in blog-post-preview">
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{{- if .Params.featured_image -}}
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<div class="blog-featured-image-container">
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<a href="{{ .Permalink }}">
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<img src="{{ .Params.featured_image }}" alt="{{ .Title }}" class="blog-featured-image" />
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</a>
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</div>
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{{- end -}}
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<h2 class="blog-post-title">
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<a href="{{ .Permalink }}">{{ .Title }}</a>
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</h2>

‎layouts/blog/single.html‎

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{{ define "main" }}
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<article class="cf f4 center lh-copy nested-links nested-copy-line-height blog-list-container">
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{{- if .Params.featured_image -}}
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<div class="blog-featured-image-container">
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<img src="{{ .Params.featured_image }}" alt="{{ .Title }}" class="blog-single-featured-image" />
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</div>
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{{- end -}}
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<header>
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<h1 class="blog-single-title">{{ .Title }}</h1>
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<p class="blog-single-meta">

‎layouts/partials/site-navigation.html‎

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<nav class="pv3" role="navigation">
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<div class="flex-l center items-center justify-between">
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<div class="flex-l items-center w-100">
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<a href="/" class="f3 fw7 hover-white white no-underline site-logo">
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{{ .Site.Title }}
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</a>
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{{ partials.Include "i18nlist.html" . }}
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{{ if .Site.Menus.main }}
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<ul class="{{ compare.Conditional (compare.Eq $.Site.Language.LanguageDirection "rtl") "pr0 ml3" "pl0 mr3" }}">

‎static/img/header-brain.gif‎

28.8 MB
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