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var(--space-8);border-radius:8px;background:var(--bg-primary);border:1px solid var(--border-tertiary);color:var(--text-secondary);transition:all .12s ease}.a-md1-img:hover{background:var(--bg-brand-1);color:var(--text-brand);border-color:var(--gold-300)}.md-content{line-height:1.6}.md-content p{margin:0 0 var(--space-12)}.md-content>:last-child{margin-bottom:0}.md-content img{max-width:100%;background:var(--bg-secondary);padding:var(--space-4)}.md-content img,.md-content svg{display:block;height:auto;margin:var(--space-20) auto;border-radius:12px;border:1px solid var(--border-tertiary);box-shadow:0 8px 24px -16px rgba(0,0,0,.4)}.md-content svg{max-width:min(100%,440px);background:#fffdf7;padding:var(--space-12)}.md-content pre{background:var(--bg-tertiary);padding:var(--space-12);overflow:auto;border-radius:8px}.md-content code{font-family:monospace}.md-content ol,.md-content ul{padding-left:var(--space-24);margin:0 0 var(--space-12)}.md-content li{margin-bottom:var(--space-4)}.md-content table{border-collapse:collapse}.md-content td,.md-content th{border:1px solid var(--border-tertiary);padding:var(--space-8)}.md-content .katex-display{margin:var(--space-20) 0;overflow-x:auto;overflow-y:hidden}.h-center{text-align:center}.h-mt-8{margin-top:var(--space-8)}.h-mt-16{margin-top:var(--space-16)}.h-mt-24{margin-top:var(--space-24)}.h-row{display:flex;gap:var(--space-12);align-items:center}.h-spinner{color:var(--text-secondary);padding:var(--space-40);text-align:center}.lp{min-height:100vh;height:100vh;overflow:hidden;justify-content:center;padding:var(--space-24);background:radial-gradient(1200px 560px at 10% -12%,var(--gold-100) 0,transparent 58%),radial-gradient(1000px 520px at 100% 0,var(--purple-100) 0,transparent 55%),var(--bg-primary)}.lp,.lp-inner{display:flex;align-items:center}.lp-inner{width:100%;max-width:560px;text-align:center;flex-direction:column}.lp-logo{font-size:24px;margin-bottom:var(--space-32)}.lp-headline{font-family:var(--font-display);font-weight:700;font-size:clamp(34px,6vw,52px);line-height:1.05;letter-spacing:-.01em;margin:0;color:var(--text-primary)}.lp-subhead{margin:var(--space-20) 0 0;max-width:480px;font-size:var(--type-body-md-size);line-height:1.6;color:var(--text-secondary)}.lp-cta{margin-top:var(--space-32);width:100%;max-width:340px}.lp-google{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-12);width:100%;height:52px;padding:0 var(--space-24);background:#fff;color:#1f2328;border:1px solid var(--border-secondary);border-radius:var(--radius-none);font-family:var(--font-label);font-weight:600;font-size:15px;box-shadow:0 10px 26px -16px var(--gold-700);transition:transform .12s ease,box-shadow .12s ease}.lp-google:hover{transform:translateY(-1px);box-shadow:0 14px 30px -16px var(--gold-700)}.lp-creds-link{display:inline-block;margin-top:var(--space-16);background:none;border:none;color:var(--text-secondary);font-size:var(--type-body-sm-size);text-decoration:underline;text-underline-offset:3px}.lp-creds-link:hover{color:var(--text-primary)}.lp-creds{display:flex;flex-direction:column;gap:var(--space-12);margin-top:var(--space-16);text-align:left}.lp-proof{margin-top:var(--space-40);display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-8);font-size:var(--type-label-sm-size);color:var(--text-secondary)}.lp-proof-dot{color:var(--gold-500)}.ob{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:var(--space-40) var(--space-24);background:radial-gradient(1100px 520px at 8% -12%,var(--gold-100) 0,transparent 56%),radial-gradient(900px 480px at 100% 0,var(--purple-100) 0,transparent 54%),var(--bg-primary)}.ob-inner{width:100%;max-width:620px;display:flex;flex-direction:column;align-items:center}.ob-logo{font-size:22px;margin-bottom:var(--space-32)}.ob-panel{width:100%;background:var(--bg-secondary);border:1px solid var(--border-secondary);padding:var(--space-32)}.ob-center{text-align:center;display:flex;flex-direction:column;align-items:center}.ob-h1{font-family:var(--font-display);font-weight:700;font-size:clamp(24px,4vw,32px);margin:0}.ob-sub{color:var(--text-secondary);line-height:1.6;margin:var(--space-16) 0 0;max-width:460px}.ob-cta{margin-top:var(--space-32);min-width:200px}.ob-progress{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-24)}.ob-step-label{color:var(--text-secondary);letter-spacing:.08em}.ob-dots{display:flex;gap:var(--space-8)}.ob-dot{width:8px;height:8px;border-radius:999px;background:var(--border-secondary)}.ob-dot.is-on{background:var(--gold-500)}.ob-prob{border:1px solid var(--border-tertiary);background:var(--bg-primary);padding:var(--space-24)}.ob-prob-q{font-size:var(--type-body-lg-size,17px);line-height:1.6}.ob-prob-opts{list-style:none;padding:0;margin:var(--space-16) 0 0;display:flex;flex-direction:column;gap:var(--space-8)}.ob-prob-opt{display:flex;gap:var(--space-12);align-items:baseline}.ob-prob-optkey{flex:none;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border-secondary);font-family:var(--font-label);font-weight:600;font-size:13px}.ob-ask{margin:var(--space-24) 0 var(--space-12);text-align:center}.ob-choices{display:flex;gap:var(--space-16)}.ob-choice{flex:1 1;height:52px;font-size:15px}.ob-topics{display:flex;flex-wrap:wrap;gap:var(--space-12);margin-top:var(--space-24)}.ob-topic{padding:var(--space-12) var(--space-20);border:1px solid var(--border-secondary);background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-label);font-size:14px;transition:border-color .12s ease,background .12s ease,transform .12s ease}.ob-topic:hover{border-color:var(--gold-400)}.ob-topic.is-sel{border-color:var(--gold-500);background:var(--bg-brand-1);color:var(--text-brand);box-shadow:0 6px 14px -10px var(--gold-700)}.ob-err{margin-top:var(--space-16)}