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var(--border);min-width:0;color:var(--fg);border-radius:8px;align-items:center;gap:.6rem;min-height:64px;padding:.85rem 1rem;text-decoration:none;transition:border-color .1s,background .1s;display:flex}.esp-nav-link:hover{border-color:var(--accent);background:var(--surface-soft,var(--surface))}.esp-nav-next{text-align:right;justify-content:flex-end}.esp-nav-arrow{color:var(--muted);font-size:1.1rem}.esp-nav-eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-size:.65rem;display:block}.esp-nav-title{margin-top:.15rem;font-size:.85rem;font-weight:500;display:block}@media (width<=520px){.esp-article{padding-inline:1rem}.lesson-progress-rail{margin-inline:0}.lesson-hero{align-items:start;padding:.85rem}.lesson-hero .esp-title-icon{width:2.65rem;height:2.65rem;font-size:1.45rem}.esp-title{font-size:1.65rem}.esp-nav{grid-template-columns:1fr}.esp-prose pre{padding:.8rem;font-size:.72rem}.esp-nav-next{justify-content:space-between}}