:root{--tn-bg: #ffffff;--tn-border: #e5e7eb;--tn-ink: #0f172a;--tn-ink-2: #475569;--tn-muted: #94a3b8;--tn-primary: #4f46e5;--tn-primary-bg: #eef2ff;--tn-shadow: 0 1px 2px rgba(15, 23, 42, .04);--tn-shadow-md: 0 8px 24px rgba(15, 23, 42, .08);--tn-h: 64px}.topnav{position:sticky;top:0;left:0;right:0;z-index:100;background:var(--tn-bg);border-bottom:1px solid var(--tn-border);box-shadow:var(--tn-shadow);font-family:Inter,system-ui,sans-serif}.topnav-inner{max-width:1280px;margin:0 auto;padding:0 24px;height:var(--tn-h);display:flex;align-items:center;gap:24px}.topnav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:"DM Serif Display",Georgia,serif;font-size:22px;letter-spacing:-.02em;color:var(--tn-ink);flex-shrink:0}.topnav-logo .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#4f46e5,#6366f1);display:flex;align-items:center;justify-content:center;color:#fff;font-family:Inter,sans-serif;font-weight:800;font-size:15px;box-shadow:0 4px 12px #4f46e559}.topnav-logo:hover .mark{transform:scale(1.05);transition:transform .18s}.topnav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}.topnav-links button,.topnav-links a{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:8px;min-height:40px;background:transparent;border:none;cursor:pointer;font-family:inherit;font-size:14px;font-weight:500;color:var(--tn-ink-2);text-decoration:none;transition:background .15s,color .15s}.topnav-links button:hover,.topnav-links a:hover{background:var(--tn-primary-bg);color:var(--tn-primary)}.topnav-links .topnav-link.active,.topnav-links button[aria-expanded=true]{color:var(--tn-primary)}.topnav-links button svg{transition:transform .2s}.topnav-links button[aria-expanded=true] svg{transform:rotate(180deg)}.topnav-spacer{flex:1}.topnav-cta{display:flex;align-items:center;gap:8px}.topnav-cta .btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:8px;min-height:40px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:all .15s}.topnav-cta .btn-ghost{background:transparent;color:var(--tn-ink-2)}.topnav-cta .btn-ghost:hover{color:var(--tn-ink);background:var(--tn-primary-bg)}.topnav-cta .btn-primary{background:var(--tn-primary);color:#fff}.topnav-cta .btn-primary:hover{background:#4338ca}.topnav-cta .btn-secondary{background:transparent;color:var(--tn-ink);border-color:var(--tn-border)}.topnav-cta .btn-secondary:hover{border-color:var(--tn-primary)}.topnav-dropdown{position:absolute;top:var(--tn-h);left:0;right:0;background:var(--tn-bg);border-bottom:1px solid var(--tn-border);box-shadow:var(--tn-shadow-md);z-index:99;animation:topnavDropIn .18s ease}.topnav-dropdown.hidden{display:none}.topnav-account-btn{display:inline-flex;align-items:center;gap:8px;padding:4px 10px 4px 4px;min-height:40px;border-radius:999px;background:transparent;border:1px solid var(--tn-border);cursor:pointer;transition:border-color .15s,background .15s}.topnav-account-btn:hover{border-color:var(--tn-primary);background:var(--tn-primary-bg)}.topnav-avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,#4f46e5,#6366f1);color:#fff;font-family:Inter,sans-serif;font-weight:700;font-size:12px;display:flex;align-items:center;justify-content:center}.topnav-account-menu{position:absolute;top:calc(100% + 6px);right:0;min-width:240px;background:var(--tn-bg);border:1px solid var(--tn-border);border-radius:12px;box-shadow:var(--tn-shadow-md);padding:6px;z-index:200}.topnav-account-menu.hidden{display:none}.topnav-account-menu .header{padding:10px 12px 8px;border-bottom:1px solid var(--tn-border);margin-bottom:4px}.topnav-account-menu .header .label{font-family:JetBrains Mono,ui-monospace,monospace;font-size:10px;letter-spacing:1px;text-transform:uppercase;color:var(--tn-muted)}.topnav-account-menu .header .email{font-size:13px;color:var(--tn-ink);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topnav-account-menu a,.topnav-account-menu button{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:8px;font-size:13px;color:var(--tn-ink-2);background:transparent;border:none;cursor:pointer;text-decoration:none;font-family:inherit;transition:background .12s,color .12s}.topnav-account-menu a:hover,.topnav-account-menu button:hover{background:var(--tn-primary-bg);color:var(--tn-primary)}@keyframes topnavDropIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.topnav-dropdown-inner{max-width:1280px;margin:0 auto;padding:28px 24px 20px;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:24px}@media (max-width: 1300px){.topnav-dropdown-inner{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width: 1100px){.topnav-dropdown-inner{grid-template-columns:repeat(2,minmax(0,1fr))}}.topnav-col h5{font-family:JetBrains Mono,ui-monospace,monospace;font-size:11px;font-weight:500;letter-spacing:1.5px;text-transform:uppercase;color:var(--tn-muted);margin:0 0 12px;padding-bottom:8px;border-bottom:2px solid transparent;transition:border-color .18s,color .18s}.topnav-col[data-active=true] h5{color:var(--tn-ink);border-bottom-color:currentColor}.topnav-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.topnav-tool{display:flex;align-items:center;gap:12px;padding:8px 10px;border-radius:8px;text-decoration:none;cursor:pointer;transition:background .15s}.topnav-tool:hover{background:var(--tool-bg, #f1f5f9)}.topnav-tool .icon-wrap{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;background:var(--icon-bg);color:var(--icon-fg);flex-shrink:0}.topnav-tool .icon-wrap svg{width:18px;height:18px}.topnav-tool .label{font-size:13px;font-weight:500;color:var(--tn-ink)}.topnav-foot{border-top:1px solid var(--tn-border);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;font-size:13px;gap:12px;flex-wrap:wrap}.topnav-foot .all-tools{color:var(--tn-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;text-decoration:none}.topnav-foot .free-note{font-family:JetBrains Mono,ui-monospace,monospace;font-size:11px;color:var(--tn-muted);letter-spacing:.5px}.topnav-breadcrumb{max-width:1280px;margin:0 auto;padding:16px 24px 0;font-size:14px;color:var(--tn-muted)}.topnav-breadcrumb a{color:var(--tn-muted);text-decoration:none}.topnav-breadcrumb a:hover{color:var(--tn-primary)}.topnav-breadcrumb .home-icon{width:14px;height:14px;vertical-align:-2px;margin-right:4px}.topnav-breadcrumb .sep{margin:0 8px;color:var(--tn-border)}.topnav-breadcrumb .current{color:var(--tn-ink);font-weight:500}.topnav-hamburger{display:none;flex-direction:column;gap:5px;align-items:center;justify-content:center;width:44px;height:44px;background:transparent;border:none;cursor:pointer;border-radius:8px}.topnav-hamburger:hover{background:var(--tn-primary-bg)}.topnav-hamburger span{display:block;width:22px;height:2px;background:var(--tn-ink-2);border-radius:2px}@media (max-width: 900px){.topnav-inner{padding:0 16px;gap:12px}.topnav-links,.topnav-cta{display:none}.topnav-hamburger{display:flex}}.topnav-mobile{position:absolute;top:var(--tn-h);left:0;right:0;background:var(--tn-bg);border-bottom:1px solid var(--tn-border);box-shadow:var(--tn-shadow-md);padding:12px 16px 24px;z-index:99;max-height:calc(100vh - var(--tn-h));overflow-y:auto}.topnav-mobile.hidden{display:none}.topnav-mobile details{border-bottom:1px solid var(--tn-border)}.topnav-mobile summary{list-style:none;display:flex;align-items:center;justify-content:space-between;padding:14px 4px;cursor:pointer;font-size:14px;font-weight:600;color:var(--tn-ink)}.topnav-mobile summary::-webkit-details-marker{display:none}.topnav-mobile details[open] summary svg{transform:rotate(180deg)}.topnav-mobile summary svg{transition:transform .2s;color:var(--tn-muted)}.topnav-mobile .mobile-tool{display:flex;align-items:center;gap:10px;padding:8px 4px;text-decoration:none;color:var(--tn-ink-2);font-size:14px}.topnav-mobile .mobile-tool:hover{color:var(--tn-primary)}.topnav-mobile .mobile-link{display:flex;align-items:center;padding:14px 4px;font-size:14px;font-weight:500;color:var(--tn-ink);border-bottom:1px solid var(--tn-border);text-decoration:none}