:root{color:#0a0a0a;font-synthesis:none;text-rendering:optimizelegibility;--surface:#fff;--surface-secondary:#f5f5f5;--text:#0a0a0a;--text-secondary:#666;--border:#d4d4d4;--border-strong:#0a0a0a;--focus:#0070f3;--inverse:#fff;background:#fff;font-family:Geist,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#root{min-width:320px;min-height:100%;margin:0}body{background:var(--surface);min-height:100dvh;color:var(--text)}button,input{font:inherit}button{color:inherit}button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}button:disabled{cursor:not-allowed;opacity:.36}.app-shell{width:min(100%,1600px);min-height:100dvh;margin:0 auto;padding-inline:clamp(20px,4vw,64px)}.topbar,.practice-header{justify-content:space-between;align-items:center;gap:24px;min-height:80px;display:flex}.brand{letter-spacing:-.02em;font-weight:600}.topbar__meta,.practice-header__step,.section-label{color:var(--text-secondary);font-size:.875rem}.practice-header>div:first-child{align-items:baseline;gap:24px;display:flex}.welcome{grid-template-columns:repeat(12,minmax(0,1fr));align-items:center;column-gap:clamp(24px,4vw,64px);min-height:calc(100dvh - 80px);padding-block:32px 64px;display:grid}.welcome__copy{grid-column:1/span 5;max-width:560px}.welcome__diagram{flex-direction:column;grid-column:7/-1;justify-content:center;align-self:stretch;min-width:0;display:flex}.section-label{margin:0 0 20px}.welcome h1{letter-spacing:-.065em;max-width:9ch;margin:0;font-size:clamp(3.5rem,7.5vw,7.5rem);font-weight:500;line-height:.9}.welcome__lede{max-width:34ch;color:var(--text-secondary);margin:32px 0 0;font-size:clamp(1.1rem,1.8vw,1.4rem);line-height:1.45}.session-outline{margin:48px 0}.session-outline div{border-bottom:1px solid var(--border);grid-template-columns:48px 1fr;gap:16px;padding-block:12px;display:grid}.session-outline dt{color:var(--text-secondary);font-family:Geist Mono,monospace;font-size:.8rem}.session-outline dd{margin:0}.primary-action{border:1px solid var(--text);background:var(--text);min-height:52px;color:var(--inverse);cursor:pointer;border-radius:6px;padding:0 24px;font-weight:500}.primary-action:hover{color:var(--text);background:0 0}.calendar{border-top:1px solid var(--border);padding-block:clamp(72px,10vw,144px)}.calendar__intro{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(24px,4vw,64px);margin-bottom:72px;display:grid}.calendar__intro .section-label{grid-column:1/span 2}.calendar__intro h2{letter-spacing:-.06em;grid-column:3/span 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