VibeCheck
https://37signals.com

Page structure & technical metrics

Words

163

Action candidates

0

Images

2

HTML

17 KB

Copy

Title chars
9short
Meta chars
45short
H1
0
H2
0

Action

Primary

00. Start here

Forms
0/ 1 fields
On-site links
62
Off-site links
8

Security & metadata

HTTPS
yes
HSTS
no
CSP
no
nosniff
no
viewport
yes
Icon
yes
JSON-LD
yes
Analytics
no

Page

Scripts
2 ext / 4 inline
Lang
en
Third-party hosts
no

Lighthouse

Simulated mobile · Performance

100 / 100

2026-09-05 · Lab data, not field data.

View details

Simulated mobile · Lab data, not field data
2026-09-05T04:06:37.697Z · Lighthouse 13.4.1

Performance100/ 100
Accessibility100/ 100
Best practices100/ 100
SEO100/ 100
LCP · Largest content1,451 ms
CLS · Layout shift0.000
TBT · Blocking time0 ms
FCP · First content1,451 ms
SI · Speed index1,772 ms

Results vary by server, network and environment, independently of taste/conversion scores. Diagnostics retain Lighthouse wording.

Image elements do not have explicit `width` and `height`

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Elements & resources
{
  "type": "table",
  "items": [
    {
      "url": "https://37signals.com/assets/images/logo.svg",
      "node": {
        "lhId": "1-76-IMG",
        "path": "1,HTML,1,BODY,3,HEADER,0,H1,0,A,0,IMG",
        "type": "node",
        "snippet": "<img src=\"/assets/images/logo.svg\" alt=\"37signals\">",
        "selector": "header.header > h1 > a > img",
        "nodeLabel": "37signals",
        "boundingRect": {
          "top": 15,
          "left": 290,
          "right": 397,
          "width": 107,
          "bottom": 45,
          "height": 30
        }
      }
    }
  ],
  "headings": [
    {
      "key": "node",
      "label": "",
      "valueType": "node"
    },
    {
      "key": "url",
      "label": "URL",
      "valueType": "url"
    }
  ]
}

Use efficient cache lifetimes

Est savings of 126 KiB

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Elements & resources
{
  "type": "table",
  "items": [
    {
      "url": "https://37signals.com/assets/fonts/LabGrotesque-Bold.woff2",
      "totalBytes": 51855,
      "wastedBytes": 51855,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/fonts/LabGrotesque-Regular.woff2",
      "totalBytes": 49740,
      "wastedBytes": 49740,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/js/script.js",
      "totalBytes": 3675,
      "wastedBytes": 3644.375,
      "cacheLifetimeMs": 60000
    },
    {
      "url": "https://37signals.com/assets/images/logo-black.svg",
      "totalBytes": 2493,
      "wastedBytes": 2493,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/images/logo.svg",
      "totalBytes": 2461,
      "wastedBytes": 2461,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/modules/controller.js",
      "totalBytes": 1555,
      "wastedBytes": 1555,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/elements.css?v=1.0.0",
      "totalBytes": 1306,
      "wastedBytes": 1306,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/content.css?v=1.0.0",
      "totalBytes": 1220,
      "wastedBytes": 1220,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/nav.css?v=1.0.0",
      "totalBytes": 1008,
      "wastedBytes": 1008,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/downloads.css?v=1.0.0",
      "totalBytes": 977,
      "wastedBytes": 977,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/page.css?v=1.0.0",
      "totalBytes": 947,
      "wastedBytes": 947,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/reset.css?v=1.0.0",
      "totalBytes": 814,
      "wastedBytes": 814,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/footer.css?v=1.0.0",
      "totalBytes": 809,
      "wastedBytes": 809,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/signup.css?v=1.0.0",
      "totalBytes": 801,
      "wastedBytes": 801,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/root.css?v=1.0.0",
      "totalBytes": 792,
      "wastedBytes": 792,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/books.css?v=1.0.0",
      "totalBytes": 765,
      "wastedBytes": 765,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/modules/signup.js",
      "totalBytes": 735,
      "wastedBytes": 735,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/signal.css?v=1.0.0",
      "totalBytes": 686,
      "wastedBytes": 686,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/header.css?v=1.0.0",
      "totalBytes": 683,
      "wastedBytes": 683,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/modules/scroll.js",
      "totalBytes": 672,
      "wastedBytes": 672,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/cluster.css?v=1.0.0",
      "totalBytes": 535,
      "wastedBytes": 535,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/modules/navigate.js",
      "totalBytes": 525,
      "wastedBytes": 525,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/fonts.css?v=1.0.0",
      "totalBytes": 524,
      "wastedBytes": 524,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/controller.css?v=1.0.0",
      "totalBytes": 449,
      "wastedBytes": 449,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/jobs.css?v=1.0.0",
      "totalBytes": 408,
      "wastedBytes": 408,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/modules/theme.js",
      "totalBytes": 402,
      "wastedBytes": 402,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/thoughts.css?v=1.0.0",
      "totalBytes": 398,
      "wastedBytes": 398,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/origin.css?v=1.0.0",
      "totalBytes": 384,
      "wastedBytes": 384,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/boundary.css?v=1.0.0",
      "totalBytes": 350,
      "wastedBytes": 350,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/button.css?v=1.0.0",
      "totalBytes": 306,
      "wastedBytes": 306,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/js/script.js?v=1.0.0",
      "totalBytes": 272,
      "wastedBytes": 272,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/thought.css?v=1.0.0",
      "totalBytes": 254,
      "wastedBytes": 254,
      "cacheLifetimeMs": 0
    },
    {
      "url": "https://37signals.com/assets/css/policies.css?v=1.0.0",
      "totalBytes": 133,
      "wastedBytes": 133,
      "cacheLifetimeMs": 0
    }
  ],
  "headings": [
    {
      "key": "url",
      "label": "Request",
      "valueType": "url"
    },
    {
      "key": "cacheLifetimeMs",
      "label": "Cache TTL",
      "valueType": "ms",
      "displayUnit": "duration"
    },
    {
      "key": "totalBytes",
      "label": "Transfer Size",
      "valueType": "bytes",
      "displayUnit": "kb",
      "granularity": 1
    }
  ],
  "sortedBy": [
    "wastedBytes"
  ],
  "debugData": {
    "type": "debugdata",
    "wastedBytes": 128903.375
  },
  "skipSumming": [
    "cacheLifetimeMs"
  ]
}

Font display

Est savings of 110 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Elements & resources
{
  "type": "table",
  "items": [
    {
      "url": "https://37signals.com/assets/fonts/LabGrotesque-Bold.woff2",
      "wastedMs": 110
    },
    {
      "url": "https://37signals.com/assets/fonts/LabGrotesque-Regular.woff2",
      "wastedMs": 110
    }
  ],
  "headings": [
    {
      "key": "url",
      "label": "URL",
      "valueType": "url"
    },
    {
      "key": "wastedMs",
      "label": "Est Savings",
      "valueType": "ms"
    }
  ],
  "skipSumming": [
    "wastedMs"
  ]
}

Network dependency tree

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Elements & resources
{
  "type": "list",
  "items": [
    {
      "type": "list-section",
      "value": {
        "type": "network-tree",
        "chains": {
          "5A563C067A258FFAC35845BEC4EEE84F": {
            "url": "https://37signals.com/",
            "children": {
              "47157.2": {
                "url": "https://37signals.com/assets/css/reset.css?v=1.0.0",
                "children": {},
                "transferSize": 814,
                "navStartToEndTime": 579
              },
              "47157.3": {
                "url": "https://37signals.com/assets/css/root.css?v=1.0.0",
                "children": {},
                "transferSize": 792,
                "navStartToEndTime": 694
              },
              "47157.4": {
                "url": "https://37signals.com/assets/css/fonts.css?v=1.0.0",
                "children": {
                  "47157.58": {
                    "url": "https://37signals.com/assets/fonts/LabGrotesque-Regular.woff2",
                    "children": {},
                    "transferSize": 49740,
                    "navStartToEndTime": 828
                  },
                  "47157.66": {
                    "url": "https://37signals.com/assets/fonts/LabGrotesque-Bold.woff2",
                    "children": {},
                    "transferSize": 51855,
                    "navStartToEndTime": 824
                  }
                },
                "transferSize": 524,
                "navStartToEndTime": 583
              },
              "47157.5": {
                "url": "https://37signals.com/assets/css/elements.css?v=1.0.0",
                "children": {},
                "transferSize": 1306,
                "navStartToEndTime": 691
              },
              "47157.6": {
                "url": "https://37signals.com/assets/css/button.css?v=1.0.0",
                "children": {},
                "transferSize": 306,
                "navStartToEndTime": 683
              },
              "47157.7": {
                "url": "https://37signals.com/assets/css/content.css?v=1.0.0",
                "children": {},
                "transferSize": 1220,
                "navStartToEndTime": 693
              },
              "47157.8": {
                "url": "https://37signals.com/assets/css/books.css?v=1.0.0",
                "children": {},
                "transferSize": 765,
                "navStartToEndTime": 690
              },
              "47157.9": {
                "url": "https://37signals.com/assets/css/boundary.css?v=1.0.0",
                "children": {},
                "transferSize": 350,
                "navStartToEndTime": 693
              },
              "47157.10": {
                "url": "https://37signals.com/assets/css/cluster.css?v=1.0.0",
                "children": {},
                "transferSize": 535,
                "navStartToEndTime": 579
              },
              "47157.11": {
                "url": "https://37signals.com/assets/css/controller.css?v=1.0.0",
                "children": {},
                "transferSize": 449,
                "navStartToEndTime": 693
              },
              "47157.12": {
                "url": "https://37signals.com/assets/css/downloads.css?v=1.0.0",
                "children": {},
                "transferSize": 977,
                "navStartToEndTime": 578
              },
              "47157.13": {
                "url": "https://37signals.com/assets/css/footer.css?v=1.0.0",
                "children": {},
                "transferSize": 809,
                "navStartToEndTime": 582
              },
              "47157.14": {
                "url": "https://37signals.com/assets/css/header.css?v=1.0.0",
                "children": {},
                "transferSize": 683,
                "navStartToEndTime": 690
              },
              "47157.15": {
                "url": "https://37signals.com/assets/css/jobs.css?v=1.0.0",
                "children": {},
                "transferSize": 408,
                "navStartToEndTime": 581
              },
              "47157.16": {
                "url": "https://37signals.com/assets/css/nav.css?v=1.0.0",
                "children": {},
                "transferSize": 1008,
                "navStartToEndTime": 688
              },
              "47157.17": {
                "url": "https://37signals.com/assets/css/origin.css?v=1.0.0",
                "children": {},
                "transferSize": 384,
                "navStartToEndTime": 693
              },
              "47157.18": {
                "url": "https://37signals.com/assets/css/page.css?v=1.0.0",
                "children": {},
                "transferSize": 947,
                "navStartToEndTime": 694
              },
              "47157.19": {
                "url": "https://37signals.com/assets/css/policies.css?v=1.0.0",
                "children": {},
                "transferSize": 133,
                "navStartToEndTime": 694
              },
              "47157.20": {
                "url": "https://37signals.com/assets/css/signal.css?v=1.0.0",
                "children": {},
                "transferSize": 686,
                "navStartToEndTime": 694
              },
              "47157.21": {
                "url": "https://37signals.com/assets/css/signup.css?v=1.0.0",
                "children": {},
                "transferSize": 801,
                "navStartToEndTime": 695
              },
              "47157.22": {
                "url": "https://37signals.com/assets/css/thought.css?v=1.0.0",
                "children": {},
                "transferSize": 254,
                "navStartToEndTime": 583
              },
              "47157.23": {
                "url": "https://37signals.com/assets/css/thoughts.css?v=1.0.0",
                "children": {},
                "transferSize": 398,
                "navStartToEndTime": 694
              },
              "47157.24": {
                "url": "https://37signals.com/assets/js/script.js?v=1.0.0",
                "children": {
                  "47157.78": {
                    "url": "https://37signals.com/assets/js/modules/controller.js",
                    "children": {},
                    "transferSize": 1555,
                    "navStartToEndTime": 829
                  },
                  "47157.79": {
                    "url": "https://37signals.com/assets/js/modules/navigate.js",
                    "children": {},
                    "transferSize": 525,
                    "navStartToEndTime": 829
                  },
                  "47157.80": {
                    "url": "https://37signals.com/assets/js/modules/scroll.js",
                    "children": {},
                    "transferSize": 672,
                    "navStartToEndTime": 829
                  },
                  "47157.81": {
                    "url": "https://37signals.com/assets/js/modules/signup.js",
                    "children": {},
                    "isLongest": true,
                    "transferSize": 735,
                    "navStartToEndTime": 832
                  },
                  "47157.82": {
                    "url": "https://37signals.com/assets/js/modules/theme.js",
                    "children": {},
                    "transferSize": 402,
                    "navStartToEndTime": 829
                  }
                },
                "isLongest": true,
                "transferSize": 272,
                "navStartToEndTime": 696
              }
            },
            "isLongest": true,
            "transferSize": 3671,
            "navStartToEndTime": 419
          }
        },
        "longestChain": {
          "duration": 832
        }
      }
    },
    {
      "type": "list-section",
      "title": "Preconnected origins",
      "value": {
        "type": "text",
        "value": "no origins were preconnected"
      },
      "description": "[preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to."
    },
    {
      "type": "list-section",
      "title": "Preconnect candidates",
      "value": {
        "type": "text",
        "value": "No additional origins are good candidates for preconnecting"
      },
      "description": "Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4."
    }
  ]
}

Render-blocking requests

Est savings of 580 ms

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Elements & resources
{
  "type": "table",
  "items": [
    {
      "url": "https://37signals.com/assets/css/signup.css?v=1.0.0",
      "totalBytes": 801
    },
    {
      "url": "https://37signals.com/assets/css/page.css?v=1.0.0",
      "totalBytes": 947
    },
    {
      "url": "https://37signals.com/assets/css/thoughts.css?v=1.0.0",
      "totalBytes": 398
    },
    {
      "url": "https://37signals.com/assets/css/root.css?v=1.0.0",
      "totalBytes": 792
    },
    {
      "url": "https://37signals.com/assets/css/signal.css?v=1.0.0",
      "totalBytes": 686
    },
    {
      "url": "https://37signals.com/assets/css/policies.css?v=1.0.0",
      "totalBytes": 133
    },
    {
      "url": "https://37signals.com/assets/css/boundary.css?v=1.0.0",
      "totalBytes": 350
    },
    {
      "url": "https://37signals.com/assets/css/controller.css?v=1.0.0",
      "totalBytes": 449
    },
    {
      "url": "https://37signals.com/assets/css/content.css?v=1.0.0",
      "totalBytes": 1220
    },
    {
      "url": "https://37signals.com/assets/css/origin.css?v=1.0.0",
      "totalBytes": 384
    },
    {
      "url": "https://37signals.com/assets/css/elements.css?v=1.0.0",
      "totalBytes": 1306
    },
    {
      "url": "https://37signals.com/assets/css/books.css?v=1.0.0",
      "totalBytes": 765
    },
    {
      "url": "https://37signals.com/assets/css/header.css?v=1.0.0",
      "totalBytes": 683
    },
    {
      "url": "https://37signals.com/assets/css/nav.css?v=1.0.0",
      "wastedMs": 150,
      "totalBytes": 1008
    },
    {
      "url": "https://37signals.com/assets/css/button.css?v=1.0.0",
      "totalBytes": 306
    },
    {
      "url": "https://37signals.com/assets/css/fonts.css?v=1.0.0",
      "totalBytes": 524
    },
    {
      "url": "https://37signals.com/assets/css/thought.css?v=1.0.0",
      "totalBytes": 254
    },
    {
      "url": "https://37signals.com/assets/css/footer.css?v=1.0.0",
      "totalBytes": 809
    },
    {
      "url": "https://37signals.com/assets/css/jobs.css?v=1.0.0",
      "totalBytes": 408
    },
    {
      "url": "https://37signals.com/assets/css/reset.css?v=1.0.0",
      "totalBytes": 814
    },
    {
      "url": "https://37signals.com/assets/css/cluster.css?v=1.0.0",
      "totalBytes": 535
    },
    {
      "url": "https://37signals.com/assets/css/downloads.css?v=1.0.0",
      "totalBytes": 977
    }
  ],
  "headings": [
    {
      "key": "url",
      "label": "URL",
      "valueType": "url"
    },
    {
      "key": "totalBytes",
      "label": "Transfer Size",
      "valueType": "bytes"
    },
    {
      "key": "wastedMs",
      "label": "Duration",
      "valueType": "timespanMs"
    }
  ]
}
Environment & raw metrics
{
  "finalUrl": "https://37signals.com/",
  "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/151.0.0.0 Safari/537.36",
  "formFactor": "mobile",
  "throttlingMethod": "simulate",
  "throttling": {
    "rttMs": 150,
    "throughputKbps": 1638.4,
    "requestLatencyMs": 562.5,
    "uploadThroughputKbps": 675,
    "cpuSlowdownMultiplier": 4,
    "downloadThroughputKbps": 1474.5600000000002
  },
  "metrics": [
    {
      "id": "largest-contentful-paint",
      "unit": "millisecond",
      "value": 1450.8105
    },
    {
      "id": "cumulative-layout-shift",
      "unit": "unitless",
      "value": 0
    },
    {
      "id": "total-blocking-time",
      "unit": "millisecond",
      "value": 0
    },
    {
      "id": "first-contentful-paint",
      "unit": "millisecond",
      "value": 1450.8105
    },
    {
      "id": "speed-index",
      "unit": "millisecond",
      "value": 1771.5976400001168
    }
  ]
}

01 / WHAT WORKS

What makes it work

Headlines themselves form the brand

Short statements such as Small teams and Work isn’t war convey a distinct attitude without illustration.

Numbering organizes a long index

Two-digit prefixes distinguish adjacent chapters and establish a reading sequence.

02 / NEXT STEPS

Where to go next

  1. 01

    Avoid fading essential index text

    Several lower index entries fade, suggesting continuation but reducing legibility.

    Restrict fading to the scroll-container edge, keep selectable entries legible and reveal full text on keyboard focus.

03 / DESIGN LANGUAGE

A design system you can reuse

Colors

Background

#ec4343

Text

#ffffff

Typography

Display font
Lab Grotesque
Body font
Lab Grotesque
Heading / body
34.4px / 34.4px

Spacing & shape

Section gap
0px
Component inset
—
Card radius
—
Button radius
0px

Parameters are element samples. Empty values are unknown, and individual samples are not site-wide rules.

04 / EVIDENCE

The detail behind the report

Values come from one capture. Fonts, radii and spacing are element samples, not a universal site-wide specification. Empty values are unknown. HTML bytes are source size, not compressed transfer size; script counts are DOM tags, not network requests.

Taste1 observations

Avoid fading essential index text

Several lower index entries fade, suggesting continuation but reducing legibility.

Restrict fading to the scroll-container edge, keep selectable entries legible and reveal full text on keyboard focus.

desktop.png and mobile.png: lower index entries fade
Launch4 observations

No HSTS header

Medium

Without Strict-Transport-Security, a first visit can still be downgraded to http. Browsers will not pin HTTPS.

Set Strict-Transport-Security: max-age=31536000; includeSubDomains at the edge.

strict-transport-security missing

No Content-Security-Policy

A CSP is the standard way to limit script sources. Vibe-coded pages often load anything, including injected scripts.

Start with a report-only CSP, then default-src 'self' and an explicit script-src.

content-security-policy missing

No X-Content-Type-Options

Without nosniff, browsers may interpret a file as a different type than you sent. It is a one-line header.

Set X-Content-Type-Options: nosniff.

x-content-type-options missing

No Referrer-Policy

The default referrer can leak internal paths and query strings to third parties.

Set Referrer-Policy: strict-origin-when-cross-origin.

referrer-policy missing
Link preview

37signals

A catalog of ideas — signals — that drive us.

05 / MAKE IT HAPPEN

Give your AI a clear next step

Use the improvement prompt for this page, or the design prompt to borrow its visual language. “Recreate” includes references and implementation steps. Paste either into your coding assistant.

Preview full instructions
Improve the current project using the 2026-09-05T03:26:03.910Z snapshot of https://37signals.com. First identify changes since capture; do not revert newer behavior to the old snapshot.

Design baseline
The top connects Basecamp, HEY, Fizzy and ONCE. A numbered index beginning at 00 organizes the company philosophy, with books, writing, jobs and policies below. Mobile retains the single numbered column. Adapt the strong single color, consistent numbering and compact index while providing clear current-item and return cues.
{
  "colors": [
    {
      "role": "bg",
      "hex": "#ec4343"
    },
    {
      "role": "ink",
      "hex": "#ffffff"
    }
  ],
  "fonts": {
    "body": "Lab Grotesque",
    "display": "Lab Grotesque",
    "stack": [
      "Lab Grotesque"
    ]
  },
  "radius": {
    "button": "0px",
    "card": "",
    "field": ""
  },
  "space": {
    "section": "0px",
    "card": ""
  },
  "type": {
    "h1": "34.4px",
    "body": "34.4px",
    "weight": "700",
    "lineHeight": "44.72px",
    "letterSpacing": "-0.344px"
  }
}
Values come from one capture. Fonts, radii and spacing are element samples, not a universal site-wide specification. Empty values are unknown. HTML bytes are source size, not compressed transfer size; script counts are DOM tags, not network requests.

Actions
1. Avoid fading essential index text
Restrict fading to the scroll-container edge, keep selectable entries legible and reveal full text on keyboard focus.
Evidence: desktop.png and mobile.png: lower index entries fade

2. No HSTS header
Set Strict-Transport-Security: max-age=31536000; includeSubDomains at the edge.
Evidence: strict-transport-security missing

3. No Content-Security-Policy
Start with a report-only CSP, then default-src 'self' and an explicit script-src.
Evidence: content-security-policy missing

4. No X-Content-Type-Options
Set X-Content-Type-Options: nosniff.
Evidence: x-content-type-options missing

5. No Referrer-Policy
Set Referrer-Policy: strict-origin-when-cross-origin.
Evidence: referrer-policy missing

Acceptance
- Check text, layout and the main action “00. Start here” at 1440×900 and 390×844.
- Preserve branding, authentication and business behavior. A screenshot does not prove broken interaction.
- Change only evidence-backed issues. Validate security headers against existing resources and authentication in report-only mode where supported.
- Compare before/after screenshots and run relevant functional tests. Do not claim untested behavior passed.