.lesson-intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:28px 0 38px}.lesson-intro-grid .callout{margin:0;min-height:170px}.lesson-intro-grid .callout strong{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:9px;color:#365f8d}.lesson-intro-grid .callout p{margin:0}.lesson-core{border-left-color:#183a63!important;background:linear-gradient(135deg,#eef3f9,#f8fafc)!important}.lesson-section{margin:54px 0}.lesson-section>h2{margin:7px 0 12px}.section-intro{max-width:760px;color:#667085!important}.concept-grid-detailed .concept-card{min-height:235px}.concept-grid-detailed .concept-card strong{font-size:18px;line-height:1.25}.concept-grid-detailed .concept-card p{font-size:15px;line-height:1.65}.editorial-depth{padding:34px 36px;border:1px solid #e0e7f0;border-radius:24px;background:#fff;box-shadow:0 14px 40px rgba(31,43,68,.05)}.editorial-depth h2{max-width:760px}.editorial-depth p{max-width:790px;font-size:18px;line-height:1.78}.editorial-depth p+p{margin-top:18px}.context-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:44px 0 54px}.context-card{padding:28px;border:1px solid #dce5ef;border-radius:22px;background:linear-gradient(145deg,#f8fbff,#fff)}.context-card h2{font-size:24px;margin:8px 0 12px;letter-spacing:-.025em}.context-card p{margin:0;line-height:1.72}.context-card-accent{background:linear-gradient(145deg,#182d46,#244d75);border-color:#244d75}.context-card-accent .eyebrow{color:#a9c7e6}.context-card-accent h2,.context-card-accent p{color:#fff}.worked-example{position:relative;overflow:hidden;margin:48px 0;padding:38px;border:1px solid #d9e5f2;border-radius:26px;background:linear-gradient(135deg,#f8fbff,#edf5ff);box-shadow:0 18px 46px rgba(49,78,112,.07)}.worked-example:after{content:"";position:absolute;width:190px;height:190px;border-radius:50%;background:rgba(255,255,255,.58);right:-85px;top:-95px}.worked-example-label{position:relative;z-index:1;font-size:11px;text-transform:uppercase;letter-spacing:.14em;font-weight:900;color:#52739c}.worked-example h2{position:relative;z-index:1;margin:8px 0 15px}.worked-example p{position:relative;z-index:1;font-size:18px;line-height:1.72}.worked-example-check{position:relative;z-index:1;margin-top:23px;padding-top:20px;border-top:1px solid #d9e5f2;color:#526276;line-height:1.6}.mistake-list{display:grid;gap:12px;margin-top:24px}.mistake-item{display:grid;grid-template-columns:48px 1fr;gap:17px;align-items:start;padding:20px;border:1px solid #e1e7ef;border-radius:17px;background:#fff}.mistake-item>span{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:#fff3f1;color:#9c493e;font-size:11px;font-weight:900}.mistake-item p{margin:5px 0 0}.practice-box-strong{background:linear-gradient(135deg,#f7fafc,#eef5fb)}.practice-box-strong>p{margin-top:-6px;color:#667085}.practice-box-strong li{padding-left:6px;line-height:1.65}.memory-banner{display:grid;gap:7px;margin:42px 0;padding:28px 30px;border-radius:22px;background:#fff8e7;border:1px solid #f0dfae}.memory-banner span{font-size:11px;text-transform:uppercase;letter-spacing:.12em;font-weight:900;color:#8a6a18}.memory-banner strong{font-size:21px;line-height:1.45;color:#3d3522}.reading-page strong{color:#22364f}.reader-banner-dark strong{color:#fff}.reading-page p{line-height:1.75}.reading-page li{line-height:1.65}@media(max-width:850px){.lesson-intro-grid,.context-grid{grid-template-columns:1fr}.concept-grid-detailed{grid-template-columns:1fr}.concept-grid-detailed .concept-card{min-height:0}.editorial-depth{padding:28px}}@media(max-width:570px){.worked-example{padding:26px 22px}.mistake-item{grid-template-columns:38px 1fr;padding:17px}.mistake-item>span{width:34px;height:34px}.memory-banner{padding:22px}.lesson-section{margin:44px 0}.editorial-depth,.context-card{padding:22px}.editorial-depth p{font-size:17px}}