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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, viewport-fit=cover">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="apple-mobile-web-app-title" content="Microlearn">
<meta name="theme-color" content="#0a0a0a">
<link rel="manifest" href="manifest.json">
<link rel="apple-touch-icon" href="icon-192.png">
<title>Microlearn</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
--bg: #050510;
--card-bg: rgba(255, 255, 255, 0.05);
--card-border: rgba(255, 255, 255, 0.12);
--card-shadow:
0 8px 32px rgba(0, 0, 0, 0.4),
0 2px 8px rgba(0, 0, 0, 0.3),
0 24px 60px rgba(0, 0, 0, 0.25),
inset 0 1px 0 rgba(255, 255, 255, 0.1),
inset 0 -1px 0 rgba(255, 255, 255, 0.03);
--text: #f0f0f5;
--text-dim: #8a8a9a;
--text-faint: #3a3a4a;
--accent: #7aa2ff;
--accent-dim: rgba(122, 162, 255, 0.15);
--accent-glow: rgba(122, 162, 255, 0.08);
--green: #34d399;
--red: #fb7185;
--purple: #c4b5fd;
--emerald: #6ee7b7;
--safe-top: env(safe-area-inset-top, 20px);
--safe-bottom: env(safe-area-inset-bottom, 20px);
}
body {
background: var(--bg);
background-image:
radial-gradient(ellipse at 15% 45%, rgba(80, 50, 160, 0.18) 0%, transparent 55%),
radial-gradient(ellipse at 85% 15%, rgba(50, 80, 160, 0.14) 0%, transparent 50%),
radial-gradient(ellipse at 50% 95%, rgba(40, 70, 130, 0.12) 0%, transparent 45%),
radial-gradient(ellipse at 60% 40%, rgba(100, 60, 140, 0.06) 0%, transparent 60%);
color: var(--text);
font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
height: 100dvh;
overflow: hidden;
-webkit-user-select: none;
user-select: none;
-webkit-tap-highlight-color: transparent;
}
body::before {
content: '';
position: fixed;
width: 300px;
height: 300px;
border-radius: 50%;
background: radial-gradient(circle, rgba(100, 80, 200, 0.12) 0%, transparent 70%);
top: 20%;
left: -10%;
filter: blur(60px);
pointer-events: none;
animation: ambientDrift 12s ease-in-out infinite alternate;
z-index: 0;
}
body::after {
content: '';
position: fixed;
width: 250px;
height: 250px;
border-radius: 50%;
background: radial-gradient(circle, rgba(60, 100, 200, 0.1) 0%, transparent 70%);
bottom: 15%;
right: -5%;
filter: blur(50px);
pointer-events: none;
animation: ambientDrift 15s ease-in-out infinite alternate-reverse;
z-index: 0;
}
@keyframes ambientDrift {
0% { transform: translate(0, 0) scale(1); }
50% { transform: translate(30px, -20px) scale(1.1); }
100% { transform: translate(-20px, 15px) scale(0.95); }
}
.app {
height: 100dvh;
display: flex;
flex-direction: column;
padding-top: var(--safe-top);
position: relative;
z-index: 1;
}
/* ── Views ── */
.view { display: none; height: 100%; flex-direction: column; }
.view.active { display: flex; }
/* ── Feed View ── */
#feedView {
position: relative;
overflow: hidden;
}
.feed-header {
display: flex;
justify-content: space-between;
align-items: center;
padding: 12px 20px 8px;
flex-shrink: 0;
z-index: 10;
}
.feed-header h1 {
font-size: 13px;
font-weight: 700;
letter-spacing: 3px;
background: linear-gradient(135deg, rgba(255,255,255,0.7) 0%, rgba(160,180,220,0.5) 100%);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
text-shadow: none;
}
.feed-header .search-btn {
background: rgba(255, 255, 255, 0.05);
border: 1px solid rgba(255, 255, 255, 0.1);
color: var(--text-dim);
font-size: 16px;
cursor: pointer;
padding: 8px 10px;
border-radius: 12px;
backdrop-filter: blur(20px);
-webkit-backdrop-filter: blur(20px);
box-shadow: 0 2px 8px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.06);
transition: all 0.2s ease;
}
.feed-header .search-btn:active {
transform: scale(0.92);
background: rgba(255, 255, 255, 0.08);
}
/* Thought drop */
.thought-drop {
padding: 0 20px 12px;
flex-shrink: 0;
}
.thought-drop input {
width: 100%;
background: rgba(255, 255, 255, 0.05);
border: 1px solid rgba(255, 255, 255, 0.12);
border-radius: 18px;
padding: 15px 22px;
color: var(--text);
font-size: 15px;
font-weight: 300;
outline: none;
font-family: inherit;
transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
backdrop-filter: blur(40px) saturate(180%);
-webkit-backdrop-filter: blur(40px) saturate(180%);
box-shadow:
0 4px 20px rgba(0, 0, 0, 0.25),
0 1px 4px rgba(0, 0, 0, 0.15),
inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.thought-drop {
position: relative;
}
.thought-drop::after {
content: '';
position: absolute;
top: 0;
left: 20px;
right: 20px;
bottom: 12px;
border-radius: 18px;
padding: 1px;
background: linear-gradient(
160deg,
rgba(255, 255, 255, 0.15) 0%,
rgba(255, 255, 255, 0.05) 30%,
transparent 50%,
rgba(255, 255, 255, 0.02) 80%,
rgba(255, 255, 255, 0.08) 100%
);
-webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
-webkit-mask-composite: xor;
mask-composite: exclude;
pointer-events: none;
}
.thought-drop input::placeholder {
color: rgba(255, 255, 255, 0.2);
font-weight: 300;
font-style: italic;
}
.thought-drop input:focus {
border-color: rgba(122, 162, 255, 0.3);
background: rgba(255, 255, 255, 0.06);
box-shadow:
0 4px 16px rgba(0, 0, 0, 0.2),
0 0 24px rgba(122, 162, 255, 0.08),
inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
/* Card stack area */
.card-stack {
flex: 1;
position: relative;
overflow: hidden;
display: flex;
align-items: center;
justify-content: center;
padding: 0 16px;
}
/* Teaser card (feed level) */
.teaser-card {
position: absolute;
width: calc(100% - 32px);
max-width: 420px;
height: 75%;
max-height: 560px;
background:
linear-gradient(
170deg,
rgba(255, 255, 255, 0.08) 0%,
rgba(255, 255, 255, 0.03) 30%,
rgba(255, 255, 255, 0.01) 60%,
rgba(255, 255, 255, 0.04) 100%
);
backdrop-filter: blur(50px) saturate(200%);
-webkit-backdrop-filter: blur(50px) saturate(200%);
border: 1px solid var(--card-border);
border-radius: 28px;
padding: 40px 32px;
display: flex;
flex-direction: column;
justify-content: center;
cursor: pointer;
touch-action: none;
will-change: transform;
box-shadow: var(--card-shadow);
transition: box-shadow 0.3s ease;
}
.teaser-card::before {
content: '';
position: absolute;
inset: 0;
border-radius: 28px;
padding: 1px;
background: linear-gradient(
160deg,
rgba(255, 255, 255, 0.22) 0%,
rgba(255, 255, 255, 0.08) 20%,
transparent 45%,
rgba(255, 255, 255, 0.02) 70%,
rgba(255, 255, 255, 0.12) 100%
);
-webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
-webkit-mask-composite: xor;
mask-composite: exclude;
pointer-events: none;
}
.teaser-card::after {
content: '';
position: absolute;
top: 0;
left: 8%;
right: 8%;
height: 1px;
background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
pointer-events: none;
}
.teaser-card .topic-tag {
font-size: 10px;
font-weight: 600;
text-transform: uppercase;
letter-spacing: 2.5px;
color: var(--accent);
margin-bottom: 20px;
display: inline-block;
padding: 5px 14px;
background: rgba(122, 162, 255, 0.08);
border: 1px solid rgba(122, 162, 255, 0.15);
border-radius: 10px;
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
box-shadow: 0 2px 8px rgba(122, 162, 255, 0.06), inset 0 1px 0 rgba(255,255,255,0.04);
}
.teaser-card .card-title {
font-size: 30px;
font-weight: 700;
line-height: 1.15;
letter-spacing: -0.5px;
margin-bottom: 24px;
background: linear-gradient(170deg, #ffffff 0%, #e0e0f0 40%, #c0c8e0 100%);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
filter: drop-shadow(0 2px 4px rgba(122, 162, 255, 0.12));
}
.teaser-card .card-hook {
font-size: 15px;
font-weight: 300;
line-height: 1.7;
color: rgba(255, 255, 255, 0.5);
}
.teaser-card .card-depth {
margin-top: auto;
padding-top: 28px;
display: flex;
align-items: center;
gap: 10px;
font-size: 11px;
font-weight: 500;
color: var(--text-faint);
letter-spacing: 0.5px;
}
.teaser-card .depth-dots {
display: flex;
gap: 5px;
}
.teaser-card .depth-dots .dot {
width: 6px;
height: 6px;
border-radius: 50%;
background: rgba(255, 255, 255, 0.1);
transition: background 0.2s;
}
.teaser-card .depth-dots .dot.filled {
background: var(--accent);
box-shadow: 0 0 6px rgba(122, 162, 255, 0.4);
}
/* Swipe indicators */
.swipe-indicator {
position: absolute;
top: 28px;
padding: 10px 22px;
border-radius: 14px;
font-size: 12px;
font-weight: 700;
letter-spacing: 2.5px;
text-transform: uppercase;
opacity: 0;
pointer-events: none;
z-index: 5;
backdrop-filter: blur(24px) saturate(180%);
-webkit-backdrop-filter: blur(24px) saturate(180%);
transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.swipe-indicator.left {
right: 28px;
border: 1.5px solid rgba(251, 113, 133, 0.6);
color: var(--red);
background: rgba(251, 113, 133, 0.1);
box-shadow: 0 4px 16px rgba(251, 113, 133, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.swipe-indicator.right {
left: 28px;
border: 1.5px solid rgba(52, 211, 153, 0.6);
color: var(--green);
background: rgba(52, 211, 153, 0.1);
box-shadow: 0 4px 16px rgba(52, 211, 153, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
/* Swipe hint at bottom */
.feed-hint {
text-align: center;
padding: 12px 20px;
padding-bottom: calc(16px + var(--safe-bottom));
font-size: 11px;
font-weight: 400;
color: rgba(255, 255, 255, 0.22);
flex-shrink: 0;
letter-spacing: 0.8px;
}
.feed-hint span {
display: inline-block;
padding: 6px 16px;
background: rgba(255, 255, 255, 0.03);
border: 1px solid rgba(255, 255, 255, 0.06);
border-radius: 20px;
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
}
/* ── Concept View (depth cards) ── */
#conceptView {
position: relative;
}
.concept-header {
display: flex;
align-items: center;
padding: 12px 20px 12px;
flex-shrink: 0;
z-index: 10;
border-bottom: 1px solid rgba(255, 255, 255, 0.06);
backdrop-filter: blur(40px) saturate(180%);
-webkit-backdrop-filter: blur(40px) saturate(180%);
background: rgba(255, 255, 255, 0.03);
}
.back-btn {
background: none;
border: none;
color: var(--text-dim);
font-size: 22px;
cursor: pointer;
padding: 4px 12px 4px 0;
}
.concept-header .concept-title {
font-size: 14px;
font-weight: 600;
color: var(--text-dim);
flex: 1;
}
.concept-header .concept-count {
font-size: 12px;
color: var(--text-faint);
font-variant-numeric: tabular-nums;
}
/* Depth card stack */
.depth-stack {
flex: 1;
position: relative;
overflow: hidden;
display: flex;
align-items: center;
justify-content: center;
padding: 0 16px;
}
.depth-card {
position: absolute;
width: calc(100% - 32px);
max-width: 420px;
height: 80%;
max-height: 620px;
background:
linear-gradient(
170deg,
rgba(255, 255, 255, 0.08) 0%,
rgba(255, 255, 255, 0.03) 30%,
rgba(255, 255, 255, 0.01) 60%,
rgba(255, 255, 255, 0.04) 100%
);
backdrop-filter: blur(50px) saturate(200%);
-webkit-backdrop-filter: blur(50px) saturate(200%);
border: 1px solid var(--card-border);
border-radius: 28px;
padding: 36px 28px;
display: flex;
flex-direction: column;
overflow-y: auto;
touch-action: pan-y;
will-change: transform;
-webkit-overflow-scrolling: touch;
box-shadow: var(--card-shadow);
}
.depth-card::before {
content: '';
position: absolute;
inset: 0;
border-radius: 28px;
padding: 1px;
background: linear-gradient(
160deg,
rgba(255, 255, 255, 0.18) 0%,
rgba(255, 255, 255, 0.06) 25%,
transparent 50%,
rgba(255, 255, 255, 0.02) 75%,
rgba(255, 255, 255, 0.1) 100%
);
-webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
-webkit-mask-composite: xor;
mask-composite: exclude;
pointer-events: none;
}
.depth-card::after {
content: '';
position: absolute;
top: 0;
left: 8%;
right: 8%;
height: 1px;
background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
pointer-events: none;
z-index: 1;
}
.depth-card .phase-label {
font-size: 16px;
font-weight: 700;
letter-spacing: -0.3px;
margin-bottom: 24px;
background: linear-gradient(to bottom, #fff 0%, #c8c8e0 100%);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
filter: drop-shadow(0 1px 2px rgba(122, 162, 255, 0.12));
}
.depth-card .card-title {
font-size: 22px;
font-weight: 700;
line-height: 1.3;
margin-bottom: 20px;
}
.depth-card .card-body {
font-size: 15px;
font-weight: 300;
line-height: 1.75;
color: rgba(255, 255, 255, 0.6);
flex: 1;
}
.depth-card .card-body strong,
.depth-card .card-body b {
color: var(--accent);
font-weight: 500;
}
.depth-card .card-body code {
background: rgba(122, 162, 255, 0.08);
padding: 2px 8px;
border-radius: 5px;
font-family: 'SF Mono', 'Menlo', monospace;
font-size: 13px;
color: var(--accent);
border: 1px solid rgba(122, 162, 255, 0.1);
}
.depth-card .card-body pre {
background: rgba(0, 0, 0, 0.4);
padding: 18px;
border-radius: 12px;
margin: 16px 0;
overflow-x: auto;
font-family: 'SF Mono', 'Menlo', monospace;
font-size: 13px;
line-height: 1.6;
color: rgba(255, 255, 255, 0.7);
border: 1px solid rgba(255, 255, 255, 0.04);
}
.depth-card .card-body em {
color: rgba(255, 255, 255, 0.8);
font-style: italic;
}
/* Custom scrollbar for depth cards */
.depth-card::-webkit-scrollbar {
width: 3px;
}
.depth-card::-webkit-scrollbar-track {
background: transparent;
}
.depth-card::-webkit-scrollbar-thumb {
background: rgba(255, 255, 255, 0.1);
border-radius: 4px;
}
.depth-card::-webkit-scrollbar-thumb:hover {
background: rgba(255, 255, 255, 0.2);
}
/* Voice button */
.voice-bar {
display: flex;
align-items: center;
justify-content: center;
gap: 16px;
padding: 16px 20px;
padding-bottom: calc(16px + var(--safe-bottom));
flex-shrink: 0;
}
.voice-btn {
width: 52px;
height: 52px;
border-radius: 50%;
background: rgba(255, 255, 255, 0.04);
border: 1px solid rgba(255, 255, 255, 0.1);
color: var(--text-dim);
font-size: 20px;
display: flex;
align-items: center;
justify-content: center;
cursor: pointer;
transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
backdrop-filter: blur(24px) saturate(180%);
-webkit-backdrop-filter: blur(24px) saturate(180%);
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.voice-btn:active {
background: var(--accent-dim);
border-color: rgba(122, 162, 255, 0.3);
transform: scale(0.9);
box-shadow: 0 0 20px rgba(122, 162, 255, 0.15);
}
.depth-nav-hint {
font-size: 11px;
font-weight: 400;
color: rgba(255, 255, 255, 0.22);
letter-spacing: 0.8px;
padding: 6px 16px;
background: rgba(255, 255, 255, 0.03);
border: 1px solid rgba(255, 255, 255, 0.06);
border-radius: 20px;
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
}
/* ── Search overlay ── */
.search-overlay {
position: fixed;
inset: 0;
background: rgba(5, 5, 16, 0.8);
backdrop-filter: blur(80px) saturate(200%);
-webkit-backdrop-filter: blur(80px) saturate(200%);
z-index: 100;
display: none;
flex-direction: column;
padding-top: var(--safe-top);
}
.search-overlay.active {
display: flex;
animation: fadeIn 0.2s ease;
}
.search-bar {
display: flex;
align-items: center;
padding: 12px 20px;
gap: 12px;
}
.search-bar input {
flex: 1;
background: rgba(255, 255, 255, 0.04);
border: 1px solid rgba(255, 255, 255, 0.1);
border-radius: 16px;
padding: 14px 20px;
color: var(--text);
font-size: 16px;
font-weight: 300;
outline: none;
font-family: inherit;
transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
backdrop-filter: blur(20px);
-webkit-backdrop-filter: blur(20px);
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.search-bar input:focus {
border-color: rgba(122, 162, 255, 0.3);
box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2), 0 0 24px rgba(122, 162, 255, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.search-bar .close-search {
background: none;
border: none;
color: var(--accent);
font-size: 14px;
font-weight: 500;
cursor: pointer;
padding: 8px;
}
.search-results {
flex: 1;
overflow-y: auto;
padding: 0 20px;
}
.search-result-item {
padding: 16px;
margin-bottom: 8px;
border: 1px solid rgba(255, 255, 255, 0.04);
border-radius: 16px;
cursor: pointer;
transition: all 0.2s ease;
background: rgba(255, 255, 255, 0.02);
}
.search-result-item:active {
opacity: 0.6;
background: rgba(255, 255, 255, 0.05);
border-color: rgba(255, 255, 255, 0.08);
}
.search-result-item .result-topic {
font-size: 10px;
font-weight: 600;
color: var(--accent);
text-transform: uppercase;
letter-spacing: 2px;
margin-bottom: 6px;
opacity: 0.8;
}
.search-result-item .result-title {
font-size: 17px;
font-weight: 600;
margin-bottom: 6px;
letter-spacing: -0.2px;
}
.search-result-item .result-snippet {
font-size: 13px;
font-weight: 300;
color: rgba(255, 255, 255, 0.4);
line-height: 1.5;
}
/* ── Animations ── */
@keyframes cardIn {
0% { transform: scale(0.85) translateY(60px); opacity: 0; filter: blur(12px); }
50% { transform: scale(1.02) translateY(-6px); opacity: 1; filter: blur(0); }
75% { transform: scale(0.995) translateY(2px); }
100% { transform: scale(1) translateY(0); opacity: 1; filter: blur(0); }
}
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
@keyframes glassShimmer {
0% { opacity: 0.5; }
50% { opacity: 1; }
100% { opacity: 0.5; }
}
.card-enter {
animation: cardIn 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
/* ── Empty state ── */
.empty-state {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100%;
color: var(--text-dim);
text-align: center;
padding: 40px;
}
.empty-state h2 {
font-size: 20px;
font-weight: 600;
color: var(--text);
margin-bottom: 8px;
letter-spacing: -0.3px;
}
.empty-state p {
font-size: 14px;
font-weight: 300;
line-height: 1.6;
color: rgba(255, 255, 255, 0.3);
}
/* ── Back button ── */
.back-btn {
background: none;
border: none;
color: var(--accent);
font-size: 20px;
cursor: pointer;
padding: 4px 14px 4px 0;
opacity: 0.8;
transition: opacity 0.15s;
}
.back-btn:active {
opacity: 0.5;
}
.concept-header .concept-title {
font-size: 13px;
font-weight: 500;
color: rgba(255, 255, 255, 0.4);
flex: 1;
letter-spacing: 0.3px;
}
.concept-header .concept-count {
font-size: 11px;
color: rgba(255, 255, 255, 0.35);
font-variant-numeric: tabular-nums;
padding: 4px 12px;
background: rgba(255, 255, 255, 0.04);
border: 1px solid rgba(255, 255, 255, 0.08);
border-radius: 10px;
font-weight: 500;
letter-spacing: 0.5px;
}
</style>
</head>
<body>
<div class="app">
<!-- Feed View -->
<div id="feedView" class="view active">
<div class="feed-header">
<h1>MICROLEARN</h1>
<button class="search-btn" id="searchBtn">🔍</button>
</div>
<div class="thought-drop">
<input type="text" id="thoughtDrop" placeholder="I'm curious about..." />
</div>
<div class="card-stack" id="cardStack"></div>
<div class="feed-hint">
<span>swipe left = skip · swipe right = more like this · tap = dive in</span>
</div>
</div>
<!-- Concept View -->
<div id="conceptView" class="view">
<div class="concept-header">
<button class="back-btn" id="backBtn">←</button>
<span class="concept-title" id="conceptTitle"></span>
<span class="concept-count" id="conceptCount"></span>
</div>
<div class="depth-stack" id="depthStack"></div>
<div class="voice-bar">
<span class="depth-nav-hint">scroll up/down · swipe right = love it</span>
</div>
</div>
<!-- Search Overlay -->
<div class="search-overlay" id="searchOverlay">
<div class="search-bar">
<input type="text" id="searchInput" placeholder="Search concepts..." autofocus />
<button class="close-search" id="closeSearch">Cancel</button>
</div>
<div class="search-results" id="searchResults"></div>
</div>
</div>
<script>
// ── IndexedDB for engagement (fully offline) ──
const DB_NAME = 'microlearn';
const DB_VERSION = 1;
let idb = null;
function openDB() {
return new Promise((resolve, reject) => {
const req = indexedDB.open(DB_NAME, DB_VERSION);
req.onupgradeneeded = (e) => {
const db = e.target.result;
if (!db.objectStoreNames.contains('engagement')) {
const store = db.createObjectStore('engagement', { keyPath: 'id', autoIncrement: true });
store.createIndex('card_id', 'card_id');
store.createIndex('event', 'event');
}
if (!db.objectStoreNames.contains('thoughts')) {
db.createObjectStore('thoughts', { keyPath: 'id', autoIncrement: true });
}
};
req.onsuccess = (e) => { idb = e.target.result; resolve(idb); };
req.onerror = () => reject(req.error);
});
}
function trackEngagement(cardId, event, durationMs = 0, metadata = {}) {
if (!idb) return;
const tx = idb.transaction('engagement', 'readwrite');
tx.objectStore('engagement').add({
card_id: cardId, event, duration_ms: durationMs,
metadata, created_at: new Date().toISOString(),
});
}
function saveThought(text) {
if (!idb) return;
const tx = idb.transaction('thoughts', 'readwrite');
tx.objectStore('thoughts').add({ text, created_at: new Date().toISOString() });
}
// ── State ──
let allCards = [];
let feedCards = [];
let feedIndex = 0;
let currentConcept = null;
let depthCards = [];
let depthIndex = 0;
// ── Markdown rendering ──
function renderMarkdown(text) {
if (!text) return '';
return text
.replace(/```(\w*)\n([\s\S]*?)```/g, '<pre>$2</pre>')
.replace(/`([^`]+)`/g, '<code>$1</code>')
.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>')
.replace(/\*([^*]+)\*/g, '<em>$1</em>')
.replace(/\n\n/g, '</p><p>')
.replace(/\n/g, '<br>');
}
// ── Feed algorithm (client-side) ──
function shuffleFeed(cards) {
// Fisher-Yates shuffle
const arr = [...cards];
for (let i = arr.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[arr[i], arr[j]] = [arr[j], arr[i]];
}
return arr;
}
// ── Load cards from cards.json ──
async function loadFeed() {
try {
const res = await fetch('cards.json');
allCards = await res.json();
} catch (e) {
// Fallback: try cached version
allCards = [];
}
feedCards = shuffleFeed(allCards);
feedIndex = 0;
renderFeedCard();
}
// ── Search (client-side) ──
function searchCards(query) {
const q = query.toLowerCase();
return allCards.filter(c =>
c.title.toLowerCase().includes(q) ||
c.topic.toLowerCase().includes(q) ||
(c.idea || '').toLowerCase().includes(q) ||
(c.example || '').toLowerCase().includes(q) ||
(c.probe || '').toLowerCase().includes(q)
);
}
// ── Feed View ──
function renderFeedCard() {
const stack = document.getElementById('cardStack');
if (feedIndex >= feedCards.length) {
stack.innerHTML = `
<div class="empty-state">
<h2>You've seen them all</h2>
<p>Drop a thought above or come back later for new cards</p>
</div>`;
return;
}
const card = feedCards[feedIndex];
const hook = card.idea ? card.idea.substring(0, 120) + '...' : '';