.public-topbar{z-index:50;background:var(--nav-glass-bg);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;gap:1.5rem;padding:1rem max(2rem,50vw - 700px + 2rem);font-family:Space Grotesk,system-ui,-apple-system,sans-serif;display:flex;position:sticky;top:0}.public-topbar-brand{color:var(--text-primary);letter-spacing:-.01em;align-items:center;gap:.55rem;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex}.public-topbar-brand img{display:block}.public-topbar-nav{align-items:center;gap:1.4rem;display:flex}.public-topbar-link{color:var(--text-tertiary);cursor:pointer;background:0 0;border:0;align-items:center;gap:.35rem;padding:0;font-family:inherit;font-size:.85rem;text-decoration:none;transition:color .15s;display:inline-flex}.public-topbar-link:hover,.public-topbar-link[aria-current=page]{color:var(--text-primary)}.public-topbar-link--btn{font-weight:500}.public-topbar-cta{color:#fff;background:linear-gradient(135deg, var(--accent-500) 0%, var(--accent-400) 100%);border-radius:999px;align-items:center;gap:.4rem;padding:.5rem 1rem;font-size:.85rem;font-weight:600;text-decoration:none;transition:box-shadow .15s,transform .15s;display:inline-flex}.public-topbar-cta:hover{transform:translateY(-1px);box-shadow:0 8px 20px #8b7dd859}.public-topbar-join-form{align-items:center;gap:.4rem;display:inline-flex}.public-topbar-join-input{background:var(--surface-glass);border:1px solid var(--border-default);color:var(--text-primary);letter-spacing:.08em;border-radius:6px;outline:0;width:105px;padding:.42rem .7rem;font-family:inherit;font-size:.82rem;transition:border-color .15s,background .15s}.public-topbar-join-input:focus{background:var(--surface-glass-hover);border-color:#a599e073}.public-topbar-join-input::placeholder{color:var(--text-muted);letter-spacing:0}.public-topbar-join-submit{color:var(--text-primary);cursor:pointer;background:#a599e02e;border:1px solid #a599e04d;border-radius:6px;padding:.45rem .85rem;font-family:inherit;font-size:.8rem;font-weight:500;transition:background .15s,border-color .15s,opacity .15s}.public-topbar-join-submit:hover:not(:disabled){background:#a599e047;border-color:#a599e073}.public-topbar-join-submit:disabled{opacity:.5;cursor:not-allowed}@media (max-width:900px){.public-topbar{gap:1rem;padding:.85rem 1.25rem}.public-topbar-nav{gap:1rem}.public-topbar-link--btn,.public-topbar-join-form,.public-topbar-link[href="/#how"],.public-topbar-link[href=\/for-teachers]{display:none}}@media (max-width:540px){.public-topbar{padding:.75rem 1rem}.public-topbar-nav{gap:.75rem}.public-topbar-link[href=\/features],.public-topbar-link[href=\/blog],.public-topbar-link[href=\/signin]{display:none}}