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var(--edge)}.brand,.site-header{display:flex;align-items:center}.brand{gap:10px;text-decoration:none;font-weight:600;letter-spacing:-.01em}.brand-mark{width:13px;height:13px;border-radius:50%;background:radial-gradient(circle at 32% 32%,#ffe9a8,#f59e0b 55%,#b45309);box-shadow:0 0 14px rgba(245,158,11,.55)}.site-header nav{display:flex;align-items:center;gap:20px}.site-header nav a{font-size:14px;color:var(--text-soft);text-decoration:none}.site-header nav a:hover{color:var(--text)}.site-footer{margin-top:90px;padding:28px;border-top:1px solid var(--edge);text-align:center}.site-footer p{max-width:52ch;margin:0 auto;font-size:13px;line-height:1.7;color:var(--text-dim)}.home{max-width:1080px;margin:0 auto;padding:0 28px}.hero{padding:84px 0 64px;max-width:46rem}.hero-eyebrow{margin:0 0 18px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim)}.hero h1{margin:0 0 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var(--edge);border-radius:10px;overflow:hidden}.principle{background:var(--bg);padding:26px 24px 28px}.principle h3{margin:0 0 10px;font-family:var(--serif);font-size:1.12rem;font-weight:400;letter-spacing:-.01em}.principle p{margin:0;color:var(--text-soft);max-width:34ch}.principle p,.subjects-lede{font-size:14.5px;line-height:1.7}.subjects-lede{margin:-12px 0 26px;max-width:46ch;color:var(--text-dim)}.subjects{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(20rem,1fr));grid-gap:14px;gap:14px}.subject a,.subject-inner{display:flex;flex-direction:column;gap:12px;height:100%;padding:22px 22px 20px;border:1px solid var(--edge);border-radius:10px;text-decoration:none;transition:border-color .15s ease,background .15s ease,transform .15s ease}.subject.live a{background:var(--bg-raised)}.subject.live a:hover{border-color:var(--edge-strong);transform:translateY(-2px)}.subject.planned 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26px;letter-spacing:.16em;text-transform:uppercase;font-weight:600}.act-lessons,.acts{list-style:none;margin:0;padding:0}.act{position:relative;padding:0 0 40px 26px;border-left:1px solid var(--edge)}.act:last-child{border-left-color:transparent}.act-head{position:relative;margin-bottom:16px}.act-head:before{content:"";position:absolute;left:-32px;top:5px;width:11px;height:11px;border-radius:50%;background:var(--act);box-shadow:0 0 0 4px var(--bg),0 0 16px color-mix(in srgb,var(--act) 60%,transparent)}.act-number{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--act);font-weight:600}.act-head h3{margin:5px 0 6px;font-family:var(--serif);font-size:1.6rem;font-weight:400;letter-spacing:-.01em}.act-question{margin:0 0 6px;font-family:var(--serif);font-size:1.02rem;color:var(--text-soft);max-width:42rem}.act-period{font-family:var(--mono);font-size:11.5px;color:var(--text-dim)}.act-lessons{display:grid;grid-gap:3px;gap:3px;margin-top:14px}.act-lesson 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var(--edge)}.outcomes{margin-top:24px;padding:16px 18px;border:1px solid var(--edge);border-radius:10px;background:var(--bg-raised)}.outcomes-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim);font-weight:600}.outcomes ul{margin:10px 0 0;padding-left:18px}.outcomes li{font-size:14px;line-height:1.62;color:var(--text-soft);margin-bottom:5px}.lesson-body{max-width:var(--measure);margin:0 auto}.prose-p{font-family:var(--serif);font-size:1.14rem;line-height:1.78;margin:0 0 1.35em;color:#dbe0ea}.lesson-body code,.prose-p code{font-family:var(--mono);font-size:.86em;padding:1px 5px;border-radius:4px;background:rgba(255,255,255,.07)}.prose-p a{color:var(--act);text-underline-offset:3px}.lesson-h2{margin:2.6em 0 .9em;font-family:var(--serif);font-size:1.62rem;font-weight:400;letter-spacing:-.01em}.key-idea{margin:2em 0;padding:20px 22px;border-radius:12px;border:1px solid color-mix(in srgb,var(--act) 34%,transparent);background:color-mix(in srgb,var(--act) 7%,var(--bg-raised))}.key-idea h3{margin:0 0 8px;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--act);font-weight:600}.key-idea p{margin:0;font-family:var(--serif);font-size:1.12rem;line-height:1.68}.quote{margin:2.2em 0;padding-left:20px;border-left:2px solid var(--act)}.quote p{margin:0 0 10px;font-family:var(--serif);font-size:1.2rem;font-style:italic;line-height:1.62;color:#e9edf5}.quote footer{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--text-dim)}.quote cite{font-style:normal;font-weight:600;color:var(--text-soft)}.side-note{margin:2em 0;padding:16px 18px;border-radius:10px;border:1px dashed var(--edge-strong)}.side-note h3{margin:0 0 8px;font-size:13px;font-weight:600}.side-note p{margin:0;font-size:14.5px;line-height:1.68;color:var(--text-soft)}.misconception{margin:2em 0;border:1px solid var(--edge);border-radius:12px;overflow:hidden}.mis-row{display:grid;grid-template-columns:8.5rem 1fr;grid-gap:14px;gap:14px;padding:15px 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auto;font-size:11px;letter-spacing:.04em}.vid-frame{margin-top:12px;position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;border:1px solid var(--edge);background:#000}.vid-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.vid-fallback{margin-top:10px;font-size:13.5px;line-height:1.6;color:var(--text-dim)}@media (max-width:640px){.vid-card{flex-wrap:wrap;gap:12px;padding:15px}.vid-host{margin-left:0;flex-basis:100%}}