-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathindex.html
More file actions
1698 lines (1584 loc) · 86.3 KB
/
index.html
File metadata and controls
1698 lines (1584 loc) · 86.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Sanjay Krishna Anbalagan — Explainable AI systems · Senior Engineer @ AWS · PhD CS</title>
<meta name="description" content="Sanjay Krishna Anbalagan is a Senior Engineer at AWS and PhD in Computer Science building FootPrint and agentfootprint — open-source TypeScript frameworks that make enterprise generative-AI applications explainable, auditable, and AI-readable." />
<meta name="author" content="Sanjay Krishna Anbalagan" />
<meta name="keywords" content="Sanjay Krishna Anbalagan, sanjay1909, FootPrint, agentfootprint, footprintjs, explainable AI, AI agents, LLM observability, ReAct, RAG, AWS engineer, generative AI, AI-readable code, deterministic agents, HCI International, UMass Lowell, enterprise AI, TypeScript agent framework" />
<meta name="robots" content="index,follow,max-image-preview:large,max-snippet:-1,max-video-preview:-1" />
<meta name="theme-color" content="#0B0B0C" />
<link rel="canonical" href="https://sanjay1909.github.io/" />
<link rel="alternate" type="text/plain" title="LLM-readable summary" href="/llms.txt" />
<!-- Open Graph -->
<meta property="og:type" content="profile" />
<meta property="og:site_name" content="Sanjay Krishna Anbalagan" />
<meta property="og:title" content="Sanjay Krishna Anbalagan — Explainable AI systems" />
<meta property="og:description" content="Senior Engineer @ AWS · PhD CS. Building FootPrint and agentfootprint — making enterprise generative-AI explainable by construction." />
<meta property="og:url" content="https://sanjay1909.github.io/" />
<meta property="og:image" content="https://sanjay1909.github.io/og.png" />
<meta property="og:image:alt" content="Sanjay Krishna Anbalagan — I make complex systems legible." />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta property="og:locale" content="en_US" />
<meta property="profile:first_name" content="Sanjay" />
<meta property="profile:last_name" content="Krishna Anbalagan" />
<meta property="profile:username" content="sanjay1909" />
<!-- Twitter -->
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Sanjay Krishna Anbalagan — Explainable AI systems" />
<meta name="twitter:description" content="Senior Engineer @ AWS · PhD CS. Building FootPrint and agentfootprint." />
<meta name="twitter:image" content="https://sanjay1909.github.io/og.png" />
<meta name="twitter:creator" content="@sanjay1909" />
<link rel="icon" type="image/svg+xml" href="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><rect width='64' height='64' rx='12' fill='%230B0B0C'/><text x='32' y='42' text-anchor='middle' font-family='Georgia,serif' font-style='italic' font-size='34' fill='%23B6F800'>s</text></svg>" />
<!-- JSON-LD structured data -->
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@graph": [
{
"@type": "Person",
"@id": "https://sanjay1909.github.io/#person",
"name": "Sanjay Krishna Anbalagan",
"alternateName": ["sanjay1909", "Sanjay Anbalagan"],
"url": "https://sanjay1909.github.io/",
"jobTitle": "Senior Engineer",
"worksFor": { "@type": "Organization", "name": "Amazon Web Services (AWS)" },
"alumniOf": { "@type": "CollegeOrUniversity", "name": "University of Massachusetts Lowell" },
"knowsAbout": [
"Explainable AI", "LLM Agents", "Generative AI", "Software Architecture",
"TypeScript", "Human-Computer Interaction", "Observability"
],
"sameAs": [
"https://github.com/sanjay1909",
"https://www.linkedin.com/in/sanjay-krishna-anbalagan/",
"https://medium.com/@sanjay1909"
],
"description": "Senior Engineer at AWS and PhD in Computer Science building developer abstractions that make enterprise generative-AI systems explainable and AI-readable."
},
{
"@type": "WebSite",
"@id": "https://sanjay1909.github.io/#website",
"url": "https://sanjay1909.github.io/",
"name": "Sanjay Krishna Anbalagan — Portfolio",
"publisher": { "@id": "https://sanjay1909.github.io/#person" },
"inLanguage": "en-US"
},
{
"@type": "SoftwareSourceCode",
"name": "FootPrint",
"alternateName": "footprintjs",
"codeRepository": "https://github.com/footprintjs/footPrint",
"programmingLanguage": "TypeScript",
"author": { "@id": "https://sanjay1909.github.io/#person" },
"description": "The flowchart pattern for backend code — self-explainable systems that AI can reason about. Causal traces, auto-generated tool descriptions, transactional state."
},
{
"@type": "SoftwareSourceCode",
"name": "agentfootprint",
"codeRepository": "https://github.com/footprintjs/agentfootprint",
"programmingLanguage": "TypeScript",
"author": { "@id": "https://sanjay1909.github.io/#person" },
"description": "The explainable agent framework — build AI agents you can explain, audit, and trust. Built on FootPrint."
},
{
"@type": "ScholarlyArticle",
"name": "Bridging UI Design and Chatbot Interactions",
"author": { "@id": "https://sanjay1909.github.io/#person" },
"datePublished": "2025",
"isPartOf": { "@type": "PublicationVolume", "name": "HCI International 2025 — Springer Proceedings" }
},
{
"@type": "ScholarlyArticle",
"name": "Visible Reasoning",
"author": { "@id": "https://sanjay1909.github.io/#person" },
"datePublished": "2026",
"isPartOf": { "@type": "PublicationVolume", "name": "HCI International 2026 — Springer Proceedings" }
}
]
}
</script>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link href="https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300;9..144,400;9..144,500;9..144,700;9..144,900&family=JetBrains+Mono:wght@300;400;500;700&family=Inter:wght@300;400;500;700&display=swap" rel="stylesheet" />
<style>
:root{
/* DARK (default) — the originals */
--ink:#F2EEE3;
--ink-mute:#9B978D;
--paper:#0B0B0C;
--paper-2:#121214;
--rule:#23231F;
--accent:#B6F800;
--accent-2:#FF5C2B;
--on-accent:#000000; /* text color that sits on top of --accent backgrounds */
--on-accent-2:#FFFFFF; /* text color that sits on top of --accent-2 backgrounds */
/* film-grain + background-glow layered over --paper; redeclared per theme */
--grain-opacity:.06;
--grain-blend:overlay;
--glow-accent:rgba(182,248,0,.06);
--glow-accent-2:rgba(255,92,43,.04);
--bubble-bg:rgba(182,248,0,.04);
--nav-bg:rgba(11,11,12,.55);
--seg-bg:rgba(11,11,12,.7);
--serif:'Fraunces', 'Times New Roman', serif;
--sans:'Inter', system-ui, sans-serif;
--mono:'JetBrains Mono', ui-monospace, monospace;
}
/* LIGHT theme — pure black ink on light grey paper.
Accent shifts to a deep forest/olive green so highlighted words stay legible.
On-accent flips so buttons with accent BG still read cleanly. */
html[data-theme="light"]{
--ink:#000000;
--ink-mute:#5A5A5E;
--paper:#EDEDED;
--paper-2:#E3E3E5;
--rule:#C4C4C7;
--accent:#3F6B00; /* deep forest green, readable on light grey */
--accent-2:#C23A00; /* deeper vermillion for light-mode contrast */
--on-accent:#F4F4F2; /* near-white text on top of dark-green bg */
--on-accent-2:#FFFFFF;
--grain-opacity:.04;
--grain-blend:multiply;
--glow-accent:rgba(63,107,0,.06);
--glow-accent-2:rgba(194,58,0,.05);
--bubble-bg:rgba(63,107,0,.06);
--nav-bg:rgba(237,237,237,.72);
--seg-bg:rgba(237,237,237,.88);
}
/* selection text stays black on lime for both themes — no override needed */
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html{scroll-behavior:smooth}
body{
background-image:
radial-gradient(1200px 600px at 80% -10%, var(--glow-accent), transparent 60%),
radial-gradient(900px 500px at -10% 30%, var(--glow-accent-2), transparent 60%);
overflow-x:hidden;
transition:background-color .35s ease, color .35s ease;
}
/* film grain */
body::after{
content:"";position:fixed;inset:0;pointer-events:none;z-index:1000;
mix-blend-mode:var(--grain-blend);opacity:var(--grain-opacity);
background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:var(--on-accent)}
/* Typography scale */
.display{
font-family:var(--serif);
font-weight:300;
font-style:italic;
font-variation-settings:"opsz" 144,"SOFT" 100;
letter-spacing:-.04em;
line-height:.92;
}
.display-roman{font-family:var(--serif);font-style:normal;font-weight:400;letter-spacing:-.035em;line-height:.95}
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-mute)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute)}
.lede{font-family:var(--serif);font-weight:400;font-size:clamp(20px,2.2vw,28px);line-height:1.35;letter-spacing:-.01em;color:var(--ink)}
.body{font-family:var(--sans);font-weight:400;font-size:16px;line-height:1.6;color:var(--ink)}
/* Marquee */
.marquee{position:fixed;top:0;left:0;right:0;z-index:50;border-bottom:1px solid var(--rule);background:var(--nav-bg);backdrop-filter:blur(10px);padding:14px 0;overflow:hidden}
.marquee-track{display:flex;gap:60px;white-space:nowrap;animation:slide 40s linear infinite}
.marquee-track span{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute)}
.marquee-track span b{color:var(--accent);font-weight:400}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
/* Top bar */
nav.bar{
position:fixed;top:46px;left:0;right:0;z-index:49;
display:flex;justify-content:space-between;align-items:center;
/* reserve right-side space for the fixed theme-toggle pill so links never overlap */
padding:18px 110px 18px 28px;border-bottom:1px solid var(--rule);
background:var(--nav-bg);backdrop-filter:blur(10px);
}
nav.bar .brand{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase}
nav.bar .brand b{color:var(--accent);font-weight:500}
nav.bar ul{display:flex;gap:24px;list-style:none;flex-wrap:nowrap}
nav.bar a{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);transition:color .2s}
nav.bar a:hover{color:var(--ink)}
nav.bar a.cta{color:var(--accent)}
/* Scroll progress rail */
.progress{position:fixed;top:0;left:0;height:2px;background:var(--accent);width:0;z-index:60;box-shadow:0 0 12px rgba(182,248,0,.5);transition:width .06s linear}
main{padding-top:108px}
/* === BEAT: one idea per viewport === */
section.beat{
min-height:100vh;
padding:120px 28px;
border-bottom:1px solid var(--rule);
position:relative;
display:flex;
flex-direction:column;
justify-content:center;
}
@media (max-width:880px){
section.beat{min-height:auto;padding:80px 22px}
}
.wrap{max-width:1320px;margin:0 auto;width:100%}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px;flex-wrap:wrap;gap:18px}
.section-num{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute)}
.section-num b{color:var(--accent);font-weight:400}
/* Hero */
.hero{padding:40px 28px 80px;min-height:100vh;display:flex;flex-direction:column;justify-content:space-between}
.hero .meta-row{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:24px}
.hero h1{
font-family:var(--serif);
font-weight:300;
font-size:clamp(48px,9.2vw,148px);
line-height:.86;
letter-spacing:-.045em;
margin-top:32px;
}
.hero h1 em{font-style:italic;font-weight:300}
.hero h1 .accent{color:var(--accent);font-style:italic;font-weight:400}
.hero .stack{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);text-align:right;line-height:1.9}
.hero .stack b{color:var(--ink);font-weight:500}
.hero .headline-row{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:end;margin-top:24px}
@media (max-width:880px){
.hero .headline-row{grid-template-columns:1fr;gap:32px}
.hero .stack{text-align:left}
}
.scrambler{display:inline-block}
/* === LIVE TRACE (hero attention hook) === */
.trace-card{
margin-top:56px;
border:1px solid var(--rule);
border-radius:6px;
background:linear-gradient(180deg, rgba(182,248,0,.02), rgba(255,92,43,.015));
padding:24px 28px 20px;
overflow:hidden;
position:relative;
}
.trace-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;flex-wrap:wrap;gap:14px}
.trace-head .left{display:flex;align-items:center;gap:14px}
.trace-head .rec{width:8px;height:8px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 8px var(--accent-2);animation:recblink 1.2s steps(2) infinite}
@keyframes recblink{50%{opacity:.25}}
.trace-head .label{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute)}
.trace-head .label b{color:var(--ink);font-weight:500}
.trace-head .right{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.trace-head .right b{color:var(--accent);font-weight:400}
.trace-prompt{
font-family:var(--mono);font-size:13px;color:var(--ink);
padding:10px 14px;background:rgba(255,255,255,.02);
border:1px solid var(--rule);border-radius:4px;
margin-bottom:8px;min-height:38px;display:flex;align-items:center;gap:10px;
}
.trace-prompt .q{color:var(--ink-mute)}
.trace-prompt .typed{color:var(--ink)}
.trace-prompt .caret{display:inline-block;width:7px;height:14px;background:var(--accent);margin-left:2px;animation:caret 1s steps(2) infinite}
@keyframes caret{50%{opacity:0}}
.trace-svg{width:100%;height:auto;display:block;margin-top:4px}
.trace-svg .edge{stroke:var(--rule);stroke-width:1.2;fill:none}
.trace-svg .edge.live{stroke:var(--accent);stroke-width:1.5;stroke-dasharray:4 5;animation:dash 2.4s linear infinite}
@keyframes dash{to{stroke-dashoffset:-18}}
.trace-svg .node circle{fill:var(--paper-2);stroke:var(--ink-mute);stroke-width:1;transition:stroke .35s ease, fill .35s ease, filter .35s ease}
.trace-svg .node.on circle{stroke:var(--accent);stroke-width:1.5;fill:rgba(182,248,0,.04);filter:drop-shadow(0 0 10px rgba(182,248,0,.35))}
.trace-svg .node text{font-family:var(--serif);font-size:14px;letter-spacing:-.005em;fill:var(--ink);text-anchor:middle;font-weight:400}
.trace-svg .node .sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;fill:var(--ink-mute)}
.trace-svg .packet{fill:var(--accent);filter:drop-shadow(0 0 6px rgba(182,248,0,.7));opacity:0}
.trace-svg .packet.fire{opacity:1}
.trace-svg .badge{opacity:0;transition:opacity .4s ease}
.trace-svg .badge.show{opacity:1}
.trace-svg .badge rect{fill:var(--accent-2);rx:3;ry:3}
.trace-svg .badge text{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;fill:var(--on-accent-2);font-weight:500;text-anchor:middle}
.trace-legend{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);flex-wrap:wrap;gap:12px}
.trace-legend b{color:var(--accent);font-weight:400}
.trace-legend a{color:var(--ink);border-bottom:1px dashed var(--ink-mute);transition:color .2s, border-color .2s}
.trace-legend a:hover{color:var(--accent);border-color:var(--accent)}
@media (max-width:680px){
.trace-card{padding:18px 18px 16px}
.trace-svg .node text{font-size:12px}
.trace-svg .node .sub{font-size:8.5px}
}
/* === Manifesto beat === */
.manifesto h2{font-family:var(--serif);font-weight:300;font-size:clamp(40px,7vw,96px);line-height:.98;letter-spacing:-.035em;margin:14px 0 28px;max-width:1100px}
.manifesto h2 em{font-style:italic;color:var(--accent)}
.manifesto .sub{font-family:var(--serif);font-weight:400;font-style:italic;font-size:clamp(20px,2vw,26px);line-height:1.4;color:var(--ink-mute);max-width:780px;margin-bottom:24px}
/* Native disclosure component */
details.disclose{border-top:1px solid var(--rule);padding:16px 0;max-width:820px}
details.disclose[open]{padding-bottom:28px}
details.disclose summary{
list-style:none;cursor:pointer;
font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);
display:inline-flex;align-items:center;gap:10px;
transition:color .2s;
}
details.disclose summary::-webkit-details-marker{display:none}
details.disclose summary::after{content:"↘";transition:transform .3s ease;display:inline-block}
details.disclose[open] summary::after{transform:rotate(90deg)}
details.disclose summary:hover{color:var(--ink)}
details.disclose .reveal-body{padding-top:20px;animation:drop .5s ease both}
@keyframes drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
details.disclose .reveal-body p{font-family:var(--serif);font-weight:400;font-size:clamp(17px,1.4vw,20px);line-height:1.55;color:var(--ink);margin-bottom:16px;max-width:720px}
details.disclose .reveal-body p.cite{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);margin-top:10px}
details.disclose .reveal-body ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin-top:8px;max-width:720px}
details.disclose .reveal-body ul li{font-family:var(--mono);font-size:12px;color:var(--ink-mute);letter-spacing:.04em;padding-left:20px;position:relative}
details.disclose .reveal-body ul li::before{content:"→";position:absolute;left:0;color:var(--accent)}
details.disclose .reveal-body ul li b{color:var(--ink);font-weight:500}
/* === About / Journey beat — single character grows up === */
.about h2{font-family:var(--serif);font-weight:300;font-size:clamp(40px,7vw,96px);line-height:.98;letter-spacing:-.035em;margin:14px 0 18px;max-width:1100px}
.about h2 em{font-style:italic;color:var(--accent)}
.about .sub{font-family:var(--serif);font-weight:400;font-style:italic;font-size:clamp(18px,1.8vw,24px);line-height:1.4;color:var(--ink-mute);max-width:820px;margin-bottom:36px}
/* Stage — one character on a shared ground line, with thought-bubble copy beside it */
.grow-stage{
position:relative;display:grid;grid-template-columns:1fr 460px;gap:60px;align-items:stretch;
border:1px solid var(--rule);border-radius:10px;padding:28px 32px 22px;
background:radial-gradient(900px 320px at 80% 100%, rgba(182,248,0,.04), transparent 60%),
radial-gradient(640px 240px at 10% 0%, rgba(255,92,43,.03), transparent 60%);
overflow:hidden;
}
@media (max-width:980px){ .grow-stage{grid-template-columns:1fr;gap:24px} }
/* LEFT: era label + typewriter bubble */
.grow-text{display:flex;flex-direction:column;gap:18px;justify-content:center;min-height:340px;padding:8px 0}
.grow-text .grow-era{
font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);
transition:color .4s;
}
.grow-text .grow-era b{color:var(--ink);font-weight:500;letter-spacing:.14em}
.grow-bubble{
position:relative;padding:18px 22px;border:1px solid var(--rule);border-radius:10px;
background:rgba(255,255,255,.018);
font-family:var(--serif);font-size:clamp(20px,2.1vw,28px);line-height:1.45;color:var(--ink);letter-spacing:-.005em;
min-height:120px;max-width:520px;
transition:border-color .5s, background .5s;
}
.grow-bubble.lit{border-color:var(--accent);background:linear-gradient(180deg, rgba(182,248,0,.04), rgba(255,92,43,.012))}
.grow-bubble::after{
content:"";position:absolute;right:-8px;top:42px;width:14px;height:14px;
background:var(--paper);border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);
transform:rotate(-45deg);
}
.grow-bubble.lit::after{border-color:var(--accent)}
@media (max-width:980px){ .grow-bubble::after{display:none} }
.grow-bubble code{font-family:var(--mono);font-size:.78em;color:var(--accent);background:rgba(182,248,0,.08);padding:2px 6px;border-radius:3px}
.grow-bubble .hl{
background:linear-gradient(180deg, transparent 60%, rgba(182,248,0,.32) 60%);
padding:0 3px;color:var(--ink);
}
.grow-bubble .caret{
display:inline-block;width:.5ch;height:1em;vertical-align:-2px;margin-left:2px;
background:var(--accent);animation:caret 1s steps(1) infinite;
}
@keyframes caret{50%{opacity:0}}
.grow-tag{
font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute);
}
.grow-tag .swap{color:var(--accent-2)}
/* RIGHT: SVG actor + ground line */
.grow-actor{
position:relative;height:380px;display:flex;align-items:flex-end;justify-content:center;
}
.grow-svg{
width:100%;height:100%;display:block;overflow:visible;
}
.grow-svg .ground{stroke:var(--rule);stroke-width:1;stroke-dasharray:3 5}
.grow-svg .ground-tick{stroke:var(--ink-mute);stroke-width:1;opacity:.45}
.grow-svg .ground-label{font-family:var(--mono);font-size:9px;letter-spacing:.18em;fill:var(--ink-mute);text-transform:uppercase;opacity:.7}
.grow-svg .figure{opacity:0;transform-origin:180px 346px;transform:scale(.94);transition:opacity .9s cubic-bezier(.4,.2,.2,1), transform .9s cubic-bezier(.2,.7,.2,1.1)}
.grow-svg .figure.on{opacity:1;transform:scale(1)}
/* shared shape colors */
.grow-svg .skin{fill:var(--paper-2);stroke:var(--ink);stroke-width:2;stroke-linejoin:round}
.grow-svg .figure.on .skin{stroke:var(--accent)}
.grow-svg .eye{fill:var(--ink);transition:transform .3s}
.grow-svg .figure.on .eye{animation:blink 3.6s steps(2) infinite;transform-origin:center}
@keyframes blink{0%,93%{transform:scaleY(1)} 96%{transform:scaleY(.08)} 100%{transform:scaleY(1)}}
.grow-svg .mouth{fill:none;stroke:var(--ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.grow-svg .figure.on .mouth{stroke:var(--accent)}
.grow-svg .acc{fill:var(--ink-mute);stroke:none}
.grow-svg .figure.on .acc{fill:var(--accent-2)}
.grow-svg .acc-line{stroke:var(--ink-mute);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round}
.grow-svg .figure.on .acc-line{stroke:var(--accent-2)}
.grow-svg .body{fill:var(--paper-2);fill-opacity:.6;stroke:var(--ink);stroke-width:2;stroke-linejoin:round}
.grow-svg .figure.on .body{stroke:var(--accent)}
/* idle wobble on the active figure */
.grow-svg .figure.on .wobble{transform-origin:center bottom;animation:wobble 4s ease-in-out infinite}
@keyframes wobble{0%,100%{transform:rotate(-1.2deg)} 50%{transform:rotate(1.2deg)}}
/* growth halo — soft glow that grows with the character */
.grow-svg .halo{fill:rgba(182,248,0,.05);opacity:0;transition:opacity .6s}
.grow-svg .figure.on .halo{opacity:1}
/* Timeline track */
.journey-track{
position:relative;margin:38px 12px 6px;height:42px;
}
.journey-track .rail{
position:absolute;left:0;right:0;top:50%;height:2px;background:var(--rule);transform:translateY(-50%);
}
.journey-track .rail .fill{
position:absolute;left:0;top:0;height:100%;background:linear-gradient(90deg, var(--accent), var(--accent-2));
width:0;transition:width 4.2s linear;
box-shadow:0 0 10px rgba(182,248,0,.4);
}
.journey-track .pin{
position:absolute;top:50%;width:12px;height:12px;border-radius:50%;background:var(--paper);border:1.5px solid var(--ink-mute);
transform:translate(-50%,-50%);transition:border-color .5s, background .5s, box-shadow .5s, transform .5s;
cursor:pointer;
}
.journey-track .pin:hover{border-color:var(--ink)}
.journey-track .pin.on{border-color:var(--accent);background:var(--accent);box-shadow:0 0 14px rgba(182,248,0,.6);transform:translate(-50%,-50%) scale(1.25)}
.journey-track .pin .yr{
position:absolute;top:18px;left:50%;transform:translateX(-50%);
font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--ink-mute);white-space:nowrap;text-transform:uppercase;
}
.journey-track .pin .yr b{display:block;color:var(--ink);margin-bottom:1px;letter-spacing:.18em}
.journey-track .pin.on .yr{color:var(--accent)}
.journey-track .pin.on .yr b{color:var(--accent)}
.about .lesson-row{margin-top:54px;display:grid;grid-template-columns:1fr;gap:18px;max-width:880px}
/* === Work beat === */
.projects-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:36px;flex-wrap:wrap;gap:24px}
.projects-head h2{font-family:var(--serif);font-style:italic;font-weight:300;font-size:clamp(48px,8vw,120px);line-height:.9;letter-spacing:-.04em}
.projects-head h2 em{font-style:italic;color:var(--accent)}
.projects-head .count{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute)}
.project{
display:grid;grid-template-columns:1fr 2fr;gap:60px;
padding:32px 0;border-top:1px solid var(--rule);
transition:background .25s ease;
}
.project:last-child{border-bottom:1px solid var(--rule)}
.project:hover{background:linear-gradient(90deg, rgba(182,248,0,0) 0%, rgba(182,248,0,.04) 100%)}
.project .id{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:8px}
.project .install{font-family:var(--mono);font-size:12px;color:var(--accent);margin-top:16px}
.project h3{font-family:var(--serif);font-weight:400;font-size:clamp(32px,4.6vw,64px);line-height:1;letter-spacing:-.03em;margin-bottom:8px}
.project h3 em{font-style:italic;color:var(--ink-mute)}
.project .tag{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);margin-top:6px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.project .tag b{color:var(--accent);font-weight:400}
.project .desc{font-family:var(--serif);font-weight:400;font-size:clamp(18px,1.6vw,22px);line-height:1.45;color:var(--ink);margin-bottom:4px}
/* === Writing beat (hover-reveal rows) === */
.writing-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:36px;flex-wrap:wrap;gap:18px}
.writing-head h2{font-family:var(--serif);font-weight:300;font-size:clamp(40px,6vw,84px);line-height:.95;letter-spacing:-.03em}
.writing-head h2 em{font-style:italic;color:var(--accent)}
.post-row{display:grid;grid-template-columns:80px 1fr auto;gap:32px;align-items:baseline;padding:24px 0;border-top:1px solid var(--rule);transition:padding .25s ease;cursor:pointer;position:relative}
.post-row:last-of-type{border-bottom:1px solid var(--rule)}
.post-row:hover{padding-left:18px;background:linear-gradient(90deg, rgba(182,248,0,0) 0%, rgba(182,248,0,.035) 100%)}
.post-row .n{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--ink-mute)}
.post-row .t{font-family:var(--serif);font-weight:400;font-style:italic;font-size:clamp(22px,2.6vw,36px);line-height:1.1;letter-spacing:-.02em;color:var(--ink)}
.post-row .arrow{font-family:var(--mono);font-size:14px;color:var(--accent);opacity:0;transition:opacity .2s, transform .2s}
.post-row:hover .arrow{opacity:1;transform:translateX(4px)}
.post-row .c{
grid-column:2 / 3;
font-family:var(--sans);font-size:14px;line-height:1.55;color:var(--ink-mute);
max-height:0;overflow:hidden;opacity:0;
transition:max-height .4s ease, opacity .3s ease, margin-top .3s ease;
max-width:640px;
}
.post-row.open .c, .post-row:hover .c{max-height:120px;opacity:1;margin-top:10px}
.news-cta{margin-top:40px;display:inline-flex;align-items:center;gap:12px;padding:14px 18px;border:1px solid var(--rule);font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);transition:all .2s}
.news-cta:hover{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.news-cta b{color:var(--accent);font-weight:400;margin-left:6px;transition:color .2s}
.news-cta:hover b{color:var(--on-accent)}
/* === Research beat === */
.research{background:var(--paper-2)}
.res-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:36px;flex-wrap:wrap;gap:18px}
.res-head h2{font-family:var(--serif);font-weight:300;font-style:italic;font-size:clamp(48px,7vw,100px);line-height:.92;letter-spacing:-.03em}
.paper{display:grid;grid-template-columns:120px 1fr;gap:40px;padding:32px 0;border-top:1px solid var(--rule)}
.paper:last-of-type{border-bottom:1px solid var(--rule)}
.paper .y{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--accent)}
.paper h4{font-family:var(--serif);font-weight:400;font-size:clamp(24px,3vw,40px);line-height:1.1;letter-spacing:-.02em;margin-bottom:10px}
.paper .venue{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);margin-top:4px;margin-bottom:14px}
.paper details.disclose{max-width:800px;border-top:none;padding-top:0}
.paper details.disclose .reveal-body p{font-family:var(--sans);font-size:15px;line-height:1.6;color:var(--ink-mute);max-width:760px}
/* Footer */
footer{padding:120px 28px 60px;background:var(--paper)}
footer .portrait-row{display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:end;margin-bottom:60px;padding-bottom:48px;border-bottom:1px solid var(--rule)}
footer .portrait{width:200px;height:200px;flex-shrink:0;position:relative}
footer .portrait img{width:100%;height:100%;object-fit:contain;display:block;filter:grayscale(100%) contrast(1.05);transition:filter .4s ease}
footer .portrait:hover img{filter:grayscale(0%) contrast(1.02)}
footer .portrait-meta{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);line-height:1.9}
footer .portrait-meta .name{font-family:var(--serif);font-style:italic;font-size:clamp(22px,2.4vw,30px);letter-spacing:-.01em;text-transform:none;color:var(--ink);line-height:1;margin-bottom:14px;display:block}
footer .portrait-meta b{color:var(--ink);font-weight:500}
@media (max-width:680px){
footer .portrait-row{grid-template-columns:1fr;gap:18px}
footer .portrait{width:140px;height:140px}
}
footer .colossal{font-family:var(--serif);font-weight:300;font-size:clamp(80px,16vw,260px);line-height:.85;letter-spacing:-.05em;color:var(--ink)}
footer .colossal em{font-style:italic;color:var(--accent)}
footer .row{display:flex;justify-content:space-between;align-items:flex-end;margin-top:60px;flex-wrap:wrap;gap:32px}
footer .links{display:flex;flex-direction:column;gap:14px}
footer .links a{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);transition:color .2s;display:inline-flex;align-items:center;gap:10px}
footer .links a:hover{color:var(--accent)}
footer .links a::before{content:"→";color:var(--accent)}
footer .meta{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);text-align:right;line-height:1.9}
footer .terminal{margin-top:80px;padding-top:24px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
footer .terminal .blink{color:var(--accent);animation:blink 1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .9s ease, transform .9s ease}
.reveal.in{opacity:1;transform:translateY(0)}
/* Mobile menu */
.menu-toggle{
display:none;background:none;border:none;cursor:pointer;padding:6px 0;
font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink);
}
.menu-toggle .bars{display:inline-flex;flex-direction:column;gap:4px;margin-left:10px;vertical-align:middle}
.menu-toggle .bars span{display:block;width:22px;height:1px;background:var(--ink);transition:transform .25s ease, opacity .2s ease}
body.menu-open .menu-toggle .bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.menu-open .menu-toggle .bars span:nth-child(2){opacity:0}
body.menu-open .menu-toggle .bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.mobile-menu{
position:fixed;inset:0;z-index:48;
background:var(--paper);
background-image:
radial-gradient(800px 500px at 80% 10%, rgba(182,248,0,.10), transparent 60%),
radial-gradient(700px 400px at 0% 90%, rgba(255,92,43,.06), transparent 60%);
transform:translateY(-100%);
transition:transform .55s cubic-bezier(.7,0,.2,1);
display:flex;flex-direction:column;justify-content:space-between;
padding:140px 28px 40px;
pointer-events:none;
}
body.menu-open .mobile-menu{transform:translateY(0);pointer-events:auto}
.mobile-menu ol{list-style:none;display:flex;flex-direction:column;gap:6px;counter-reset:m}
.mobile-menu ol li{counter-increment:m;border-top:1px solid var(--rule);padding:18px 0;display:flex;align-items:baseline;gap:18px;opacity:0;transform:translateY(20px);transition:opacity .5s ease, transform .5s ease}
.mobile-menu ol li:last-child{border-bottom:1px solid var(--rule)}
body.menu-open .mobile-menu ol li{opacity:1;transform:translateY(0)}
body.menu-open .mobile-menu ol li:nth-child(1){transition-delay:.10s}
body.menu-open .mobile-menu ol li:nth-child(2){transition-delay:.16s}
body.menu-open .mobile-menu ol li:nth-child(3){transition-delay:.22s}
body.menu-open .mobile-menu ol li:nth-child(4){transition-delay:.28s}
body.menu-open .mobile-menu ol li:nth-child(5){transition-delay:.34s}
body.menu-open .mobile-menu ol li:nth-child(6){transition-delay:.40s}
.mobile-menu ol li::before{content:"0" counter(m);font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--accent)}
.mobile-menu ol li a{font-family:var(--serif);font-style:italic;font-weight:300;font-size:clamp(36px,9vw,64px);line-height:1;letter-spacing:-.02em;color:var(--ink);flex:1}
.mobile-menu ol li a em{font-style:italic}
.mobile-menu .footer{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap}
.mobile-menu .footer .left{display:flex;flex-direction:column;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.mobile-menu .footer .left a{color:var(--ink)}
.mobile-menu .footer .left a:hover{color:var(--accent)}
.mobile-menu .footer .right{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);text-align:right;line-height:1.8}
.mobile-menu .footer .right b{color:var(--accent);font-weight:400}
/* === Theme-toggle wrapper (fixed, top-right) === */
.theme-wrap{
position:fixed;top:50px;right:28px;z-index:51;
display:inline-flex;align-items:center;
}
/* Theme toggle: sun/moon sliding pill */
.theme-toggle{
appearance:none;cursor:pointer;border:1px solid var(--rule);border-radius:999px;
background:var(--seg-bg);backdrop-filter:blur(10px);
width:56px;height:28px;padding:0;position:relative;
transition:background .25s, border-color .25s;
}
.theme-toggle:hover{border-color:var(--ink-mute)}
.theme-toggle .knob{
position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;
background:var(--ink);transition:transform .3s cubic-bezier(.4,.2,.2,1), background .25s;
display:flex;align-items:center;justify-content:center;
font-size:12px;line-height:1;color:var(--paper);
}
html[data-theme="light"] .theme-toggle .knob{transform:translateX(28px)}
.theme-toggle .knob::before{content:"☾"}
html[data-theme="light"] .theme-toggle .knob::before{content:"☀"}
.theme-toggle .sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (max-width:880px){ .theme-wrap{top:42px;right:auto;left:28px} }
/* === Right rail TOC (docs-style) === */
.rail{
position:fixed;right:28px;top:240px;z-index:40;
display:flex;flex-direction:column;gap:10px;
width:180px;
}
.rail .label{font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:6px}
.rail a{
display:flex;align-items:center;gap:10px;
font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
color:var(--ink-mute);padding:6px 0;
border-left:1px solid var(--rule);padding-left:14px;margin-left:2px;
transition:color .2s, border-color .2s;
}
.rail a .n{color:var(--ink-mute);font-size:9.5px;min-width:28px}
.rail a:hover{color:var(--ink);border-left-color:var(--ink-mute)}
.rail a.active{color:var(--accent);border-left-color:var(--accent)}
.rail a.active .n{color:var(--accent)}
@media (max-width:1340px){ .rail{display:none} }
/* === Terminal-style section headers === */
.cmd-head{
font-family:var(--mono);font-size:12px;letter-spacing:.1em;
color:var(--ink-mute);margin-bottom:28px;display:flex;align-items:center;gap:12px;
padding:10px 14px;border:1px solid var(--rule);border-radius:3px;
background:rgba(255,255,255,.012);max-width:fit-content;
}
.cmd-head .dollar{color:var(--accent)}
.cmd-head .file{color:var(--ink);text-transform:none;letter-spacing:.02em}
.cmd-head .link{color:var(--ink-mute);text-decoration:none;border:1px solid transparent;padding:2px 6px;border-radius:2px;cursor:pointer;transition:color .2s, border-color .2s, background .2s}
.cmd-head .link:hover{color:var(--accent);border-color:var(--rule)}
.cmd-head .link.copied{color:var(--on-accent);background:var(--accent);border-color:var(--accent)}
/* === Notebook cell for project (In / Out) === */
.project{position:relative}
.project .cell-label{
font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;
color:var(--accent);margin-bottom:6px;display:block;
}
.project .cell-label.out{color:var(--accent-2)}
/* Responsive */
@media (max-width:880px){
nav.bar{padding:18px 28px}
nav.bar ul{display:none}
.menu-toggle{display:inline-flex;align-items:center}
.project{grid-template-columns:1fr;gap:18px}
.post-row{grid-template-columns:50px 1fr 24px;gap:14px}
.post-row .c{grid-column:1 / -1}
.paper{grid-template-columns:1fr;gap:14px}
}
@media (min-width:881px){
.mobile-menu{display:none}
}
</style>
<!-- Theme bootstrap: runs before body renders to prevent flash-of-wrong-theme -->
<script>
(function(){
try{
var stored = localStorage.getItem('theme');
var theme;
if(stored === 'light' || stored === 'dark'){
theme = stored;
} else {
theme = (window.matchMedia && window.matchMedia('(prefers-color-scheme: light)').matches) ? 'light' : 'dark';
}
document.documentElement.setAttribute('data-theme', theme);
var meta = document.querySelector('meta[name="theme-color"]');
if(meta) meta.setAttribute('content', theme === 'light' ? '#EDEDED' : '#0B0B0C');
}catch(e){
document.documentElement.setAttribute('data-theme','dark');
}
})();
</script>
</head>
<body>
<div class="progress" id="progress" aria-hidden="true"></div>
<div class="marquee" aria-hidden="true">
<div class="marquee-track">
<span>Now shipping <b>FootPrint v1</b></span><span>—</span>
<span>320+ subscribers · Enterprise Gen AI Application</span><span>—</span>
<span>Accepted at <b>HCII 2026</b></span><span>—</span>
<span>Senior Engineer @ AWS</span><span>—</span>
<span>PhD CS · UMass Lowell</span><span>—</span>
<span>Now shipping <b>FootPrint v1</b></span><span>—</span>
<span>320+ subscribers · Enterprise Gen AI Application</span><span>—</span>
<span>Accepted at <b>HCII 2026</b></span><span>—</span>
<span>Senior Engineer @ AWS</span><span>—</span>
<span>PhD CS · UMass Lowell</span><span>—</span>
</div>
</div>
<nav class="bar">
<div class="brand">Sanjay Krishna <b>//</b> Anbalagan</div>
<ul>
<li><a href="#manifesto">Manifesto</a></li>
<li><a href="#about">About</a></li>
<li><a href="#work">Work</a></li>
<li><a href="#writing">Writing</a></li>
<li><a href="#research">Research</a></li>
<li><a href="#contact" class="cta">Get in touch ↗</a></li>
</ul>
<button class="menu-toggle" id="menuToggle" aria-label="Toggle menu" aria-expanded="false">
<span id="menuLabel">Menu</span>
<span class="bars" aria-hidden="true"><span></span><span></span><span></span></span>
</button>
</nav>
<div class="theme-wrap">
<button class="theme-toggle" id="themeToggle" type="button" aria-label="Toggle light/dark theme" title="Toggle theme">
<span class="knob" aria-hidden="true"></span>
<span class="sr">Toggle theme</span>
</button>
</div>
<aside class="rail" aria-label="On this page">
<div class="label">On this page</div>
<a href="#manifesto" data-rail="manifesto"><span class="n">§ 01</span> Manifesto</a>
<a href="#about" data-rail="about"><span class="n">§ 02</span> About</a>
<a href="#work" data-rail="work"><span class="n">§ 03</span> Work</a>
<a href="#writing" data-rail="writing"><span class="n">§ 04</span> Writing</a>
<a href="#research" data-rail="research"><span class="n">§ 05</span> Research</a>
</aside>
<div class="mobile-menu" id="mobileMenu" aria-hidden="true">
<ol>
<li><a href="#manifesto" data-nav>Manifesto</a></li>
<li><a href="#about" data-nav>About</a></li>
<li><a href="#work" data-nav>Work</a></li>
<li><a href="#writing" data-nav><em>Writing</em></a></li>
<li><a href="#research" data-nav>Research</a></li>
<li><a href="#contact" data-nav style="color:var(--accent)">Get in touch ↗</a></li>
</ol>
<div class="footer">
<div class="left">
<a href="https://www.linkedin.com/in/sanjay-krishna-anbalagan/" target="_blank" rel="noopener">LinkedIn ↗</a>
<a href="https://medium.com/@sanjay1909" target="_blank" rel="noopener">Medium ↗</a>
<a href="https://github.com/sanjay1909" target="_blank" rel="noopener">GitHub ↗</a>
</div>
<div class="right">
<div><b>2026</b></div>
</div>
</div>
</div>
<main>
<!-- ============ HERO — attention hook is the live trace ============ -->
<section class="hero">
<div class="wrap">
<div class="meta-row">
<div class="left">
<div class="eyebrow">Sanjay Krishna Anbalagan</div>
<div class="mono" style="margin-top:12px">A portfolio in three acts: build · write · research</div>
</div>
<div class="stack">
<div><b>2026</b></div>
<div>SR. ENGINEER · <b>AWS</b></div>
<div>PHD CS · <b>UMASS LOWELL</b></div>
</div>
</div>
<div class="headline-row">
<h1>
<span class="display-roman">I make</span><br/>
<em class="display">complex systems</em><br/>
<span class="accent">legible.</span>
</h1>
<p class="lede" style="max-width:420px">
Ten years on a single problem — making the internal state of complex systems readable to whoever needs to understand them. First humans. <em style="font-family:var(--serif);font-style:italic">Now AI.</em>
</p>
</div>
<!-- LIVE TRACE: the attention hook -->
<div class="trace-card" aria-label="Live FootPrint trace demonstration">
<div class="trace-head">
<div class="left">
<span class="rec" aria-hidden="true"></span>
<span class="label">live trace · <b>footprint v1</b></span>
</div>
<div class="right">causal · auditable · <b>AI-readable</b></div>
</div>
<div class="trace-prompt" aria-live="polite">
<span class="q">›</span><span class="typed" id="tracePrompt"></span><span class="caret" id="traceCaret"></span>
</div>
<svg class="trace-svg" viewBox="0 0 1200 210" preserveAspectRatio="xMidYMid meet" aria-hidden="true">
<!-- edges -->
<path id="edge1" class="edge" d="M 160 100 C 260 100, 300 100, 400 100" />
<path id="edge2" class="edge" d="M 520 100 C 620 100, 660 100, 760 100" />
<path id="edge3" class="edge" d="M 880 100 C 980 100, 1020 100, 1080 100" />
<!-- nodes -->
<g class="node" id="n1">
<circle cx="100" cy="100" r="50"/>
<text x="100" y="96">Query</text>
<text class="sub" x="100" y="114">input</text>
<text class="sub" x="100" y="176">user · step 1</text>
</g>
<g class="node" id="n2">
<circle cx="460" cy="100" r="50"/>
<text x="460" y="96">RAG</text>
<text class="sub" x="460" y="114">retrieve</text>
<text class="sub" x="460" y="176">policy corpus</text>
</g>
<g class="node" id="n3">
<circle cx="820" cy="100" r="50"/>
<text x="820" y="96">Tool</text>
<text class="sub" x="820" y="114">call</text>
<text class="sub" x="820" y="176">coverage.check()</text>
</g>
<g class="node" id="n4">
<circle cx="1140" cy="100" r="50"/>
<text x="1140" y="96">Trace</text>
<text class="sub" x="1140" y="114">explain</text>
<text class="sub" x="1140" y="176">causal graph</text>
</g>
<!-- evidence badges -->
<g class="badge" id="b1" transform="translate(420 34)">
<rect width="80" height="20" rx="3" ry="3"/>
<text x="40" y="14">§ 4.2</text>
</g>
<g class="badge" id="b2" transform="translate(780 34)">
<rect width="84" height="20" rx="3" ry="3"/>
<text x="42" y="14">TOOL ✓</text>
</g>
<g class="badge" id="b3" transform="translate(1100 34)">
<rect width="80" height="20" rx="3" ry="3"/>
<text x="40" y="14">AUDIT</text>
</g>
<!-- packets -->
<circle class="packet" id="pkt1" r="5" cx="-10" cy="-10"/>
<circle class="packet" id="pkt2" r="5" cx="-10" cy="-10"/>
<circle class="packet" id="pkt3" r="5" cx="-10" cy="-10"/>
</svg>
<div class="trace-legend">
<div>every decision → <b>traceable</b> · every answer → <b>citable</b></div>
<div><a href="#work">see how it works ↓</a></div>
</div>
</div>
</div>
</section>
<!-- ============ § 01 MANIFESTO — one sentence visible, argument hidden ============ -->
<section id="manifesto" class="beat manifesto">
<div class="wrap">
<div class="cmd-head reveal" data-perma="manifesto">
<span class="dollar">$</span>
<span>cat</span>
<span class="file">./manifesto.md</span>
<span style="margin-left:auto">§ 01</span>
<span class="link" data-copy="manifesto">↘ permalink</span>
</div>
<h2 class="reveal">Most enterprise AI ships <em>hallucinating</em>, opaque, and untestable. <br/>It doesn't have to.</h2>
<p class="sub reveal">A working thesis, restated continuously through code and writing.</p>
<details class="disclose reveal">
<summary>Read the argument</summary>
<div class="reveal-body">
<p>I build the developer abstractions that make production generative-AI applications explainable by construction. Not after the fact. Not by adding a logging layer. By making the system itself self-describing.</p>
<p>If a backend can produce a causal trace of every decision it made, then a model can reason over it, an engineer can debug it, and a regulator can audit it. The same artifact serves all three readers.</p>
<p class="cite">— Explainability isn't a feature. It's a property of the substrate.</p>
</div>
</details>
</div>
</section>
<!-- ============ ABOUT — cartoon evolution of LLMs and my apps alongside ============ -->
<section id="about" class="beat about">
<div class="wrap">
<div class="cmd-head reveal" data-perma="about">
<span class="dollar">$</span>
<span>whoami</span>
<span class="file">--story</span>
<span style="margin-left:auto">§ 02</span>
<span class="link" data-copy="about">↘ permalink</span>
</div>
<h2 class="reveal">I've been here <em>since the baby days.</em></h2>
<p class="sub reveal">A decade shipping apps on top of language models — from the era when an LLM forgot its own middle sentence, to the era when it runs a tool graph with a boss. FootPrint and agentfootprint are the <em>shape of what that apprenticeship taught me.</em></p>
<!-- GROW STAGE — single character that actually grows up -->
<div class="grow-stage reveal" id="journey" aria-label="One character growing from baby LLM to shipping professional across four eras">
<!-- LEFT: era copy + typewriter bubble -->
<div class="grow-text">
<div class="grow-era"><b id="growYear">2020</b> · <span id="growEra">Highlight era</span></div>
<div class="grow-bubble" id="growBubble">
<span id="growText"></span><span class="caret" aria-hidden="true"></span>
</div>
<div class="grow-tag">What the app was doing: <span class="swap" id="growDoing">wrapping the world in tags</span></div>
</div>
<!-- RIGHT: SVG actor on a shared ground -->
<div class="grow-actor">
<svg class="grow-svg" viewBox="0 0 360 380" preserveAspectRatio="xMidYMax meet" aria-hidden="true">
<!-- shared ground line + ticks -->
<line class="ground" x1="20" y1="346" x2="340" y2="346"/>
<line class="ground-tick" x1="60" y1="346" x2="60" y2="352"/>
<line class="ground-tick" x1="140" y1="346" x2="140" y2="352"/>
<line class="ground-tick" x1="220" y1="346" x2="220" y2="352"/>
<line class="ground-tick" x1="300" y1="346" x2="300" y2="352"/>
<text class="ground-label" x="20" y="370">2020</text>
<text class="ground-label" x="320" y="370" text-anchor="end">2024 →</text>
<!-- ====== BABY — era 0 — short, round, sits low ====== -->
<g class="figure" data-era="0">
<ellipse class="halo" cx="180" cy="290" rx="86" ry="74"/>
<g class="wobble">
<!-- little feet poking out -->
<ellipse class="acc" cx="162" cy="340" rx="14" ry="6"/>
<ellipse class="acc" cx="198" cy="340" rx="14" ry="6"/>
<!-- round sitting body -->
<ellipse class="body" cx="180" cy="312" rx="44" ry="32"/>
<!-- bib -->
<path class="acc-line" d="M146 298 Q180 322 214 298 L210 312 Q180 326 150 312 Z"/>
<text x="168" y="314" font-family="monospace" font-size="12" class="acc"></></text>
<!-- short arms -->
<path class="acc-line" d="M140 306 Q118 312 116 322"/>
<path class="acc-line" d="M220 306 Q242 312 244 322"/>
<!-- giant head -->
<ellipse class="skin" cx="180" cy="238" rx="56" ry="58"/>
<!-- ear tufts -->
<path class="acc-line" d="M156 184 Q160 170 170 176"/>
<path class="acc-line" d="M200 182 Q210 170 212 184"/>
<!-- eyes -->
<circle class="eye" cx="160" cy="238" r="5.5"/>
<circle class="eye" cx="200" cy="238" r="5.5"/>
<!-- cheek blush -->
<circle class="acc" cx="138" cy="258" r="4"/>
<circle class="acc" cx="222" cy="258" r="4"/>
<!-- tooth smile -->
<path class="mouth" d="M160 268 Q180 282 200 268"/>
<rect class="acc" x="175" y="273" width="10" height="7" rx="1"/>
</g>
</g>
<!-- ====== TODDLER — era 1 — stands up, wobbly, holds blocks ====== -->
<g class="figure" data-era="1">
<ellipse class="halo" cx="180" cy="260" rx="90" ry="100"/>
<g class="wobble">
<!-- legs -->
<path class="acc-line" d="M166 344 L166 298"/>
<path class="acc-line" d="M194 344 L194 298"/>
<ellipse class="acc" cx="160" cy="344" rx="12" ry="5"/>
<ellipse class="acc" cx="200" cy="344" rx="12" ry="5"/>
<!-- body (chubby rounded square) -->
<path class="body" d="M140 252 Q140 236 156 236 L204 236 Q220 236 220 252 L220 296 Q220 306 210 306 L150 306 Q140 306 140 296 Z"/>
<!-- arm holding a block -->
<path class="acc-line" d="M140 268 Q122 276 118 294"/>
<path class="acc-line" d="M220 268 Q240 272 248 286"/>
<!-- stacked blocks (thought steps: 1 → 2 → 3) -->
<g transform="translate(252 260)">
<rect class="acc-line" width="18" height="18" x="0" y="0"/>
<rect class="acc-line" width="18" height="18" x="0" y="-20"/>
<rect class="acc-line" width="18" height="18" x="0" y="-40"/>
<text x="6" y="14" font-family="monospace" font-size="10" class="acc">1</text>
<text x="6" y="-6" font-family="monospace" font-size="10" class="acc">2</text>
<text x="6" y="-26" font-family="monospace" font-size="10" class="acc">3</text>
</g>
<!-- head -->
<ellipse class="skin" cx="180" cy="198" rx="44" ry="46"/>
<!-- hair tuft -->
<path class="acc" d="M162 158 Q180 142 200 158 Q190 152 180 156 Q170 152 162 158 Z"/>
<!-- eyes -->
<circle class="eye" cx="164" cy="198" r="4"/>
<circle class="eye" cx="196" cy="198" r="4"/>
<!-- raised brow -->
<path class="acc-line" d="M156 185 Q164 180 172 185"/>
<path class="acc-line" d="M188 185 Q196 180 204 185"/>
<!-- "oh!" mouth -->
<ellipse class="mouth" cx="180" cy="222" rx="6" ry="8" style="fill:rgba(255,92,43,.18)"/>
</g>
</g>
<!-- ====== STUDENT — era 2 — taller, cap, glasses, tree-of-thought branch ====== -->
<g class="figure" data-era="2">
<ellipse class="halo" cx="180" cy="220" rx="108" ry="130"/>
<g class="wobble">
<!-- legs (longer) -->
<path class="acc-line" d="M166 344 L166 266"/>
<path class="acc-line" d="M194 344 L194 266"/>
<ellipse class="acc" cx="160" cy="344" rx="12" ry="5"/>
<ellipse class="acc" cx="200" cy="344" rx="12" ry="5"/>
<!-- hoodie/sweatshirt body -->
<path class="body" d="M134 216 Q134 200 152 200 L208 200 Q226 200 226 216 L226 272 Q226 282 216 282 L144 282 Q134 282 134 272 Z"/>
<!-- hoodie pocket line -->
<path class="acc-line" d="M150 248 Q180 258 210 248"/>