/* First lessons: teach one idea through several beginner-friendly mental models. */
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.zib-first-masterclass>header h2{margin:8px 0 7px;color:#fff;font-size:25px;line-height:1.65}
.zib-first-masterclass>header p{max-width:730px;margin:0;color:#c7d7ed;font-size:12px;line-height:2}
.zib-first-lenses{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:20px;background:#f7faff}
.zib-first-lenses article{display:grid;grid-template-columns:36px 1fr;gap:12px;align-items:start;padding:17px;border:1px solid var(--fm-line);border-radius:14px;background:#fff;box-shadow:0 8px 24px rgba(26,64,108,.06)}
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.zib-first-lenses article:nth-child(2)>b{background:linear-gradient(145deg,#00a888,#087661)}
.zib-first-lenses article:nth-child(3)>b{background:linear-gradient(145deg,#ff9a32,#d76108)}
.zib-first-lenses article:nth-child(4)>b{background:linear-gradient(145deg,#805cf7,#5530ce)}
.zib-first-lenses h3{margin:0 0 5px;color:var(--fm-ink);font-size:14px;line-height:1.7}
.zib-first-lenses p{margin:0;color:var(--fm-muted);font-size:11px;line-height:2}
.zib-first-mental-model{padding:22px 26px;border-top:1px solid #e6edf6;border-bottom:1px solid #e6edf6;background:linear-gradient(110deg,#f6fbff,#eef6ff)}
.zib-first-mental-model>span{display:block;margin-bottom:12px;color:#1557ff;font-size:11px;font-weight:900}
.zib-first-mental-model>div{display:grid;grid-template-columns:1fr 28px 1fr 28px 1fr;align-items:center}
.zib-first-mental-model article{min-height:112px;padding:15px;border:1px solid #d7e6f9;border-radius:13px;background:rgba(255,255,255,.88)}
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.zib-first-mental-model h3{margin:0 0 5px;color:var(--fm-ink);font-size:14px}
.zib-first-mental-model p{clear:both;margin:0;color:var(--fm-muted);font-size:10px;line-height:1.9}
.zib-first-mental-model i{color:#6393e7;text-align:center;font-size:18px;font-style:normal}
.zib-first-walkthrough,.zib-first-glossary,.zib-first-why,.zib-first-practice-ladder{padding:25px 27px;border-bottom:1px solid #e7edf5}
.zib-first-block-heading{margin-bottom:15px}
.zib-first-block-heading h3{margin:4px 0;color:var(--fm-ink);font-size:18px;line-height:1.8}
.zib-first-block-heading p{margin:0;color:var(--fm-muted);font-size:10px;line-height:1.9}
.zib-first-walkthrough ol{display:grid;gap:9px;margin:0;padding:0;list-style:none;counter-reset:walk}
.zib-first-walkthrough li{display:grid;position:relative;grid-template-columns:minmax(200px,.82fr) 1.18fr;gap:13px;align-items:center;counter-increment:walk;padding:10px 34px 10px 10px;border:1px solid #dce6f2;border-radius:11px;background:#f9fbfe}
.zib-first-walkthrough li:before{content:counter(walk);display:grid;position:absolute;right:7px;top:50%;width:22px;height:22px;place-items:center;border-radius:7px;color:#1557ff;background:#e6efff;font-size:9px;font-weight:900;transform:translateY(-50%)}
.zib-first-walkthrough code{direction:ltr;display:block;min-width:0;padding:12px 14px;border-radius:9px;color:#b7f5cb;background:#081b35;font-family:Consolas,Monaco,monospace;font-size:11px;line-height:1.6;text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:inset 0 0 0 1px rgba(128,178,255,.15)}
.zib-first-walkthrough p{margin:0;color:#475a73;font-size:11px;line-height:1.95}
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.zib-first-glossary article{padding:14px;border:1px solid #dfe7f1;border-radius:12px;background:#fff;box-shadow:0 7px 18px rgba(27,64,105,.05)}
.zib-first-glossary h4{margin:0 0 5px;color:#124dbb;font-size:12px}
.zib-first-glossary p{margin:0;color:var(--fm-muted);font-size:10px;line-height:1.9}
.zib-first-why{background:#fbfcfe}
.zib-first-why>div:last-child{display:grid;gap:8px}
.zib-first-why details{border:1px solid #dfe7f1;border-radius:11px;background:#fff;overflow:hidden}
.zib-first-why summary{position:relative;padding:14px 17px;color:var(--fm-ink);font-size:11px;font-weight:900;cursor:pointer;list-style:none}
.zib-first-why summary:after{content:"+";position:absolute;left:16px;color:#1557ff;font-size:16px}
.zib-first-why details[open] summary:after{content:"−"}
.zib-first-why details p{margin:0;padding:0 17px 15px;color:var(--fm-muted);font-size:10px;line-height:2}
.zib-first-practice-ladder>div:nth-child(2){display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}
.zib-first-practice-ladder article{position:relative;padding:17px;border:1px solid #dce6f2;border-radius:13px;background:linear-gradient(145deg,#fff,#f7faff)}
.zib-first-practice-ladder article>b{display:grid;width:31px;height:31px;place-items:center;border-radius:9px;color:#fff;background:#1557ff;box-shadow:0 7px 16px rgba(21,87,255,.2)}
.zib-first-practice-ladder article>span{position:absolute;top:18px;left:16px;color:#77869a;font-size:9px;font-weight:800}
.zib-first-practice-ladder h4{margin:12px 0 4px;color:var(--fm-ink);font-size:13px}
.zib-first-practice-ladder article p{margin:0;color:var(--fm-muted);font-size:10px;line-height:1.9}
.zib-first-success{margin:12px 0 0;padding:12px 15px;border:1px solid #acdcca;border-radius:10px;color:#286554;background:#effbf7;font-size:10px;line-height:1.9}
.zib-first-masterclass>footer{padding:20px 27px;background:linear-gradient(120deg,#071d3d,#0b315f);color:#fff}
.zib-first-masterclass>footer strong{font-size:12px}
.zib-first-masterclass>footer ol{display:flex;flex-wrap:wrap;gap:8px;margin:11px 0 0;padding:0;list-style:none;counter-reset:method}
.zib-first-masterclass>footer li{counter-increment:method;padding:9px 11px;border:1px solid rgba(255,255,255,.14);border-radius:9px;color:#cfdef0;background:rgba(255,255,255,.055);font-size:10px}
.zib-first-masterclass>footer li:before{content:counter(method) ". ";color:#6ea1ff;font-weight:900}
body.zib-theme-dark .zib-first-masterclass,body.zib-dark .zib-first-masterclass{--fm-ink:#e7effa;--fm-muted:#aebbd0;--fm-line:#29415d;border-color:#29415d;background:#0d2038}
body.zib-theme-dark .zib-first-lenses,body.zib-dark .zib-first-lenses{background:#0a1a2d}
body.zib-theme-dark .zib-first-lenses article,body.zib-theme-dark .zib-first-glossary article,body.zib-theme-dark .zib-first-why details,body.zib-theme-dark .zib-first-practice-ladder article,body.zib-dark .zib-first-lenses article,body.zib-dark .zib-first-glossary article,body.zib-dark .zib-first-why details,body.zib-dark .zib-first-practice-ladder article{border-color:#29415d;background:#102640}
body.zib-theme-dark .zib-first-mental-model,body.zib-dark .zib-first-mental-model{border-color:#29415d;background:#0b1e34}
body.zib-theme-dark .zib-first-mental-model article,body.zib-dark .zib-first-mental-model article{border-color:#29415d;background:#102640}
body.zib-theme-dark .zib-first-walkthrough,body.zib-theme-dark .zib-first-glossary,body.zib-theme-dark .zib-first-why,body.zib-theme-dark .zib-first-practice-ladder,body.zib-dark .zib-first-walkthrough,body.zib-dark .zib-first-glossary,body.zib-dark .zib-first-why,body.zib-dark .zib-first-practice-ladder{border-color:#29415d;background:#0d2038}
body.zib-theme-dark .zib-first-walkthrough li,body.zib-dark .zib-first-walkthrough li{border-color:#29415d;background:#102640}
body.zib-theme-dark .zib-first-success,body.zib-dark .zib-first-success{border-color:#2d6656;color:#9ad8c8;background:#12382f}
@media(max-width:860px){.zib-first-glossary>div:last-child{grid-template-columns:repeat(2,minmax(0,1fr))}.zib-first-practice-ladder>div:nth-child(2){grid-template-columns:1fr}.zib-first-walkthrough li{grid-template-columns:1fr}}
@media(max-width:620px){.zib-first-masterclass{border-radius:14px}.zib-first-masterclass>header{padding:22px 18px}.zib-first-masterclass>header h2{font-size:20px}.zib-first-lenses{grid-template-columns:1fr;padding:13px}.zib-first-mental-model,.zib-first-walkthrough,.zib-first-glossary,.zib-first-why,.zib-first-practice-ladder{padding:20px 15px}.zib-first-mental-model>div{grid-template-columns:1fr}.zib-first-mental-model i{padding:3px;transform:rotate(-90deg)}.zib-first-glossary>div:last-child{grid-template-columns:1fr}.zib-first-masterclass>footer{padding:18px 15px}.zib-first-masterclass>footer ol{display:grid}.zib-first-walkthrough li:before{display:none}}