/* Shared styles for all lesson pages. One file, cached by the browser. */
:root{--cream:#FFF1E2;--card:#FFF9F2;--peach:#FFE9D2;--ink:#3A2450;--muted:#7A6590;--line:#E3C3A5;--outline:#1C1430;--coral-d:#C23A1F;--honey:#FFC15E;--mint:#7FE0C2;--mint-d:#136B58;--px:'Jersey 15',monospace;--body:'Nunito',system-ui,sans-serif}
*{box-sizing:border-box;margin:0}
body{font-family:var(--body);color:var(--ink);line-height:1.6;background:linear-gradient(180deg,#2A1F45 0%,#4B3873 25%,#B77C9E 70%,#FFC4A3 100%) fixed}
a{color:var(--mint-d);font-weight:700}
.top{display:flex;gap:10px;flex-wrap:wrap;padding:14px max(16px,4vw)}
.btn{font-family:var(--px);font-weight:600;color:var(--ink);background:var(--mint);border:3px solid var(--outline);border-radius:12px;padding:0 16px;min-height:44px;display:inline-flex;align-items:center;box-shadow:0 4px 0 var(--outline);text-decoration:none}
.btn.sec{background:var(--cream)}
main{max-width:820px;margin:0 auto;padding:6px max(16px,4vw) 60px}
.hero{color:var(--cream);margin:8px 0 18px}
.kicker{font-family:var(--px);color:var(--mint);letter-spacing:.2em;font-size:.8rem;font-weight:700}
h1{font-family:var(--px);font-size:clamp(1.7rem,5vw,2.6rem);line-height:1.1;margin:.3rem 0 .5rem;text-shadow:4px 4px 0 #1C1430aa}
.meta{display:flex;gap:8px;flex-wrap:wrap}
.meta span{font-family:var(--px);font-size:.78rem;background:#1C1430aa;border:2px solid #ffffff44;border-radius:99px;padding:2px 12px;color:var(--cream)}
.goal{background:var(--card);border:3px solid var(--outline);border-left:10px solid var(--honey);border-radius:14px;box-shadow:5px 5px 0 var(--outline);padding:14px 18px;margin-bottom:18px;font-weight:700}
section{background:#FFF9F2f7;border:3px solid var(--outline);border-radius:16px;box-shadow:6px 6px 0 var(--outline);padding:clamp(16px,3vw,24px);margin-bottom:16px}
h2{font-family:var(--px);font-size:1.25rem;color:var(--coral-d);margin-bottom:8px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
h2 .n{font-family:var(--body);font-weight:800}
h2 .t{font-size:.72rem;background:var(--peach);border:2px solid var(--line);border-radius:99px;padding:1px 10px;color:var(--muted)}
h3{font-family:var(--px);font-size:1rem;margin:14px 0 4px}
p{margin:0 0 10px}ul,ol{margin:0 0 10px;padding-left:1.3em}li{margin-bottom:6px}
pre{background:#2A1F45;color:#FFF1E2;border:3px solid var(--outline);border-radius:10px;padding:12px 14px;overflow-x:auto;font-size:.88rem;margin:8px 0 12px}
code{font-family:"SF Mono",Menlo,Consolas,monospace}
p code,li code,td code{background:var(--peach);border:1px solid var(--line);border-radius:5px;padding:.05em .35em;font-size:.9em}
.out{background:#E3F8EF;border:2px solid var(--mint-d);border-radius:10px;padding:8px 12px;margin:6px 0 12px;font-size:.9rem;overflow-x:auto}
.out b{font-family:var(--px);color:var(--mint-d)}
.box{background:var(--peach);border:2px solid var(--line);border-left:8px solid var(--mint);border-radius:10px;padding:10px 14px;margin:8px 0 12px}
.box.bridge{border-left-color:#C9BCEF}.box.cap{border-left-color:#FF6B4A}
table{width:100%;border-collapse:collapse;margin:8px 0 12px;font-size:.92rem}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line)}th{font-family:var(--px);color:var(--muted);font-size:.8rem}
details{background:var(--cream);border:2px solid var(--line);border-radius:10px;padding:8px 12px;margin:8px 0}summary{cursor:pointer;font-weight:800}
.step{font-family:var(--px);background:var(--honey);border:2px solid var(--outline);border-radius:8px;padding:0 10px}
footer{max-width:820px;margin:0 auto;padding:0 max(16px,4vw) 40px;color:var(--cream);display:flex;gap:16px;flex-wrap:wrap}footer a{color:var(--mint)}
.byline{flex-basis:100%;width:100%;margin-bottom:6px;padding:12px 16px;background:#1C1430aa;border:2px solid #ffffff44;border-radius:12px;color:#FFF1E2;font-size:.95rem;line-height:1.5}.byline a{color:#FFC15E;font-weight:800;white-space:nowrap}.byline{display:flex;align-items:center;gap:14px}.byline .av{width:48px;height:48px;border-radius:50%;border:3px solid #FFC15E;object-fit:cover;flex:none;background:#FFF1E2}

/* Game blocks */
.game .gbox{background:#2A1F45;color:#FFF1E2;border:3px solid var(--outline);border-radius:14px;padding:14px 16px;box-shadow:4px 4px 0 var(--outline)}
.game .gtop{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-family:var(--px);font-size:.85rem;margin-bottom:8px}
.game .gtop span{background:#1C1430;border:2px solid #ffffff44;border-radius:99px;padding:1px 12px}
.game pre{margin:6px 0 10px;font-size:.88rem;white-space:pre-wrap;word-break:break-word}
.game .q{font-family:var(--px);margin:8px 0 8px}
.game .choices{display:flex;gap:10px;flex-wrap:wrap}
.game button{font-family:var(--px);font-weight:600;font-size:.95rem;color:var(--ink);background:var(--honey);border:3px solid var(--outline);border-radius:12px;padding:6px 16px;min-height:44px;cursor:pointer;box-shadow:0 4px 0 var(--outline);text-align:left}
.game button:hover:not(:disabled){background:var(--mint)}
.game button:disabled{cursor:default;opacity:.55;box-shadow:none}
.game button.pick{opacity:1;background:var(--cream);outline:3px solid var(--mint)}
.game button:focus-visible{outline:3px solid var(--coral-d);outline-offset:2px}
.game .fb{background:var(--cream);color:var(--ink);border:2px solid var(--line);border-left:8px solid var(--mint);border-radius:10px;padding:10px 14px;margin-top:12px;font-size:.92rem}
.game .fb.bad{border-left-color:#FF6B4A}
.game .fb b{font-family:var(--px)}
.game .fb code{display:block;margin:4px 0;white-space:pre-wrap}
.game .dog{float:right;margin:0 0 6px 10px}
.game .end h3{font-size:1.2rem;margin-bottom:4px}

/* Small labels and numbers read better in the body font than in the pixel font */
.meta span,h2 .t,th,.game .gtop span{font-family:var(--body);font-weight:800}

@media(max-width:600px){table{display:block;overflow-x:auto}}
:not(pre)>code{overflow-wrap:anywhere}

/* skip link: visible only when it has keyboard focus */
.skip{position:absolute;left:12px;top:-60px;z-index:20;background:var(--ink);color:var(--cream);padding:10px 16px;border-radius:0 0 10px 10px;font-weight:800;text-decoration:none}.skip:focus{top:0;outline:3px solid var(--honey)}

/* diagrams: plain HTML and CSS, so that a screen reader can read them and a phone can reflow them */
.diagram{margin:12px 0 16px;padding:14px;background:var(--peach);border:3px solid var(--outline);border-radius:14px;box-shadow:4px 4px 0 var(--outline)}
.diagram ol,.diagram ul{list-style:none;margin:0;padding:0}
.diagram .flow{display:flex;flex-wrap:wrap;gap:6px;align-items:stretch}
.diagram .box-d{flex:1 1 140px;background:var(--card);color:var(--ink);border:2px solid var(--outline);border-radius:10px;padding:8px 10px;font-size:.92rem;line-height:1.3;display:flex;flex-direction:column;justify-content:center;text-align:center}
.diagram .box-d b{font-family:var(--px);font-size:1.05rem;font-weight:400}
.diagram .box-d span{display:block;margin-top:2px;font-size:.82rem}
.diagram .group{flex:1 1 150px;display:flex}.diagram .group ul{display:flex;flex-direction:column;gap:6px;width:100%}.diagram .group .box-d{flex:1 1 auto}
.diagram .arrow{flex:0 0 auto;align-self:center;display:flex;flex-direction:column;align-items:center;font-family:var(--px);font-size:1.5rem;line-height:1;color:var(--coral-d)}
.diagram .arrow::before{content:"\2192"}.diagram .arrow i{font-style:normal;font-family:var(--body,inherit);font-size:.72rem;line-height:1.15;color:var(--ink);max-width:90px;text-align:center;margin-top:2px}
.diagram .stackdown{flex-direction:column}.diagram .stackdown .box-d,.diagram .stackdown .group{flex:0 0 auto}.diagram .stackdown .arrow::before{content:"\2193"}
.diagram .stackonly .box-d{text-align:left}
.diagram .loopback{margin:8px 0 0;padding:6px 10px;background:var(--card);border:2px dashed var(--outline);border-radius:10px;font-size:.88rem;color:var(--ink);text-align:center}.diagram .loopback span{font-size:1.2rem;color:var(--coral-d);margin-right:4px}
.diagram .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:8px}
.diagram .col{background:var(--card);border:2px solid var(--outline);border-radius:10px;padding:8px 12px}.diagram .col h4{font-family:var(--px);font-weight:400;font-size:1.05rem;margin:0 0 4px}.diagram .col ul{list-style:disc;padding-left:18px;font-size:.9rem}
.diagram figcaption{margin-top:10px;font-size:.92rem;color:var(--ink);font-weight:700;text-align:center}
@media(max-width:620px){.diagram .flow:not(.stackdown) .arrow::before{content:"\2193"}.diagram .flow:not(.stackdown){flex-direction:column}.diagram .flow:not(.stackdown) .box-d,.diagram .flow:not(.stackdown) .group{flex:0 0 auto}.diagram .arrow i{max-width:none}}

/* long flows go top to bottom: compact boxes, the arrow and its label on one line */
.diagram .stackdown{align-items:center;gap:4px}
.diagram .stackdown>.box-d{width:min(100%,560px);padding:6px 12px}
.diagram .stackdown>.group{width:min(100%,560px)}.diagram .stackdown .group ul{flex-direction:row;flex-wrap:wrap}.diagram .stackdown .group .box-d{flex:1 1 150px}
.diagram .stackdown .arrow{flex-direction:row;gap:8px;font-size:1.15rem;min-height:18px}.diagram .stackdown .arrow i{font-size:.8rem;max-width:none;margin:0;text-align:left}
.diagram .stackdown .box-d span{display:inline;margin:0 0 0 8px}.diagram .stackdown .box-d span::before{content:"\00b7\00a0"}
.diagram .stackdown .box-d{display:block;text-align:center}
.diagram .stackdown .group .box-d{text-align:center}
.diagram .stackdown .group .box-d span{display:block;margin:2px 0 0}.diagram .stackdown .group .box-d span::before{content:none}

/* spaced review: questions from earlier days (assets/review.js) */
.spaced{margin-top:14px;padding:12px 14px;background:var(--peach);border:2px dashed var(--outline);border-radius:12px}
.spaced h3{margin:0 0 4px}.spaced .note{font-size:.9rem;margin:0 0 8px}
.spaced-q{background:var(--card);border:2px solid var(--outline);border-radius:10px;padding:10px 12px;margin:8px 0}
.spaced-q .from{font-size:.82rem;font-weight:800;margin:0 0 4px}.spaced-q .q{font-weight:700;margin:6px 0}.spaced-q .ctx{font-style:italic;margin:4px 0}
.spaced-q pre{white-space:pre-wrap;word-break:break-word;margin:4px 0 8px}
.spaced .choices{display:flex;flex-direction:column;gap:6px}
.spaced button{font:inherit;font-weight:600;text-align:left;color:var(--ink);background:var(--honey);border:3px solid var(--outline);border-radius:12px;padding:6px 14px;min-height:44px;cursor:pointer}
.spaced button:hover:not(:disabled){background:var(--mint)}.spaced button:focus-visible{outline:3px solid var(--coral-d);outline-offset:2px}
.spaced button:disabled{cursor:default}.spaced button.right{background:var(--mint)}.spaced button.wrong{background:#FFD0C4}.spaced button.pick{outline:3px solid var(--outline)}
.spaced .fb{margin-top:8px;padding:8px 12px;background:var(--cream);border-left:8px solid var(--mint-d);border-radius:8px;font-size:.92rem}