.skip-link{position:absolute;top:-100%;left:1rem}.skip-link:focus{top:.5rem}.navbar{z-index:100;background:var(--color-surface);-webkit-backdrop-filter:blur(12px)saturate(1.4);border-bottom:1px solid var(--color-border);height:var(--navbar-height);position:sticky;top:0}.navbar__inner{justify-content:space-between;align-items:center;max-width:1400px;height:100%;margin:0 auto;padding:0 1.5rem;display:flex}.navbar__logo{color:var(--color-text);font-weight:800;font-size:var(--font-size-lg);letter-spacing:-.02em;align-items:center;gap:.625rem;text-decoration:none;display:flex}.navbar__logo:hover{color:var(--color-accent);text-decoration:none}.navbar__logo-img{border-radius:var(--radius);width:auto;height:2rem}.navbar__toggle{cursor:pointer;color:var(--color-text);background:0 0;border:none;padding:.5rem;display:none}.navbar__nav{align-items:center;gap:.5rem;display:flex}.navbar__links{gap:.25rem;margin:0;padding:0;list-style:none;display:flex}.nav-link{color:var(--color-text-secondary);border-radius:var(--radius);font-size:var(--font-size-sm);transition:color var(--transition),background var(--transition);padding:.5rem .75rem;font-weight:500;text-decoration:none}.nav-link:hover{color:var(--color-text);background:var(--color-accent-subtle);text-decoration:none}.navbar__actions{align-items:center;gap:.5rem;display:flex}.lang-switcher{font-size:var(--font-size-sm);color:var(--color-text-secondary);border-radius:var(--radius);height:2rem;transition:color var(--transition),background var(--transition);align-items:center;padding:.375rem .5rem;font-weight:500;text-decoration:none;display:flex}.lang-switcher:hover{color:var(--color-text);background:var(--color-accent-subtle);text-decoration:none}.icon-links{align-items:center;gap:.125rem;height:2rem;margin:0;padding:0;list-style:none;display:flex}.icon-link{color:var(--color-text-secondary);border-radius:var(--radius);width:2rem;height:2rem;transition:color var(--transition),background var(--transition);justify-content:center;align-items:center;padding:0;text-decoration:none;display:flex}.icon-link:hover{color:var(--color-accent);background:var(--color-accent-subtle);text-decoration:none}.search-form{align-items:center;display:flex}.search-form__input{font-family:var(--font-body);font-size:var(--font-size-sm);border:1px solid var(--color-border);border-radius:var(--radius)0 0 var(--radius);background:var(--color-bg-secondary);height:2rem;color:var(--color-text);width:140px;transition:border-color var(--transition),width var(--transition-slow),box-shadow var(--transition);padding:0 .75rem}.search-form__input:focus{border-color:var(--color-accent);width:200px;box-shadow:0 0 0 3px var(--color-accent-subtle);outline:none}.search-form__btn{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:0 var(--radius)var(--radius)0;cursor:pointer;height:2rem;color:var(--color-text-secondary);transition:color var(--transition),background var(--transition);border-left:none;align-items:center;padding:0 .5rem;display:flex}.search-form__btn:hover{color:var(--color-accent);background:var(--color-accent-subtle)}.site-container{grid-template-columns:var(--sidebar-width)minmax(0,1fr)var(--toc-width);max-width:1400px;min-height:calc(100vh - var(--navbar-height) - 4rem);gap:2rem;margin:0 auto;padding:2rem 1.5rem;display:grid}.sidebar{top:calc(var(--navbar-height) + 1.5rem);max-height:calc(100vh - var(--navbar-height) - 3rem);font-size:var(--font-size-sm);border-right:1px solid var(--color-border);align-self:start;padding:.75rem 1rem .75rem 0;position:sticky;overflow-y:auto}.toc-sidebar{top:calc(var(--navbar-height) + 1.5rem);max-height:calc(100vh - var(--navbar-height) - 3rem);border-left:2px solid var(--color-border);font-size:var(--font-size-sm);align-self:start;padding-left:1.25rem;position:sticky;overflow-y:auto}.toc-sidebar__title{font-weight:700;font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-secondary);margin-bottom:.75rem}.toc-sidebar ul{margin:0;padding-left:0;list-style:none}.toc-sidebar li{margin-bottom:.2rem}.toc-sidebar ul ul{border-left:1px solid var(--color-border);margin-top:.15rem;padding-left:.875rem}.toc-sidebar a{color:var(--color-text-muted);font-size:var(--font-size-xs);transition:color var(--transition),background var(--transition);border-radius:4px;padding:.2rem .5rem;text-decoration:none;display:block}.toc-sidebar a:hover{color:var(--color-accent);background:var(--color-accent-subtle);text-decoration:none}.toc-sidebar a.is-active{color:var(--color-accent);background:var(--color-accent-subtle);font-weight:600}.toc-sidebar li.is-active>a{color:var(--color-accent);font-weight:600}.content{max-width:var(--content-max-width);width:100%}.site-footer{border-top:1px solid var(--color-border);font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-top:3rem;padding:2rem 1.5rem}.site-footer__inner{flex-wrap:wrap;justify-content:space-between;gap:.5rem;max-width:1400px;margin:0 auto;display:flex}.site-footer a{color:var(--color-accent);text-underline-offset:3px;transition:color var(--transition);text-decoration:underline 1px #58a6ff59}.site-footer a:hover{color:var(--color-accent-hover);text-decoration-color:var(--color-accent-hover)}.back-to-top{background:var(--color-surface);-webkit-backdrop-filter:blur(8px);border:1px solid var(--color-border);width:2.75rem;height:2.75rem;color:var(--color-text-secondary);box-shadow:var(--shadow-md);transition:opacity var(--transition),color var(--transition),box-shadow var(--transition),transform var(--transition);z-index:50;border-radius:50%;justify-content:center;align-items:center;text-decoration:none;display:flex;position:fixed;bottom:2rem;right:2rem}.back-to-top:hover{color:var(--color-accent);box-shadow:var(--shadow-lg);text-decoration:none;transform:translateY(-2px)}.back-to-top[hidden]{display:none}@media (width<=1200px){.site-container{grid-template-columns:var(--sidebar-width)1fr}.toc-sidebar{display:none}}@media (width<=768px){.site-container{grid-template-columns:1fr;padding:1rem .75rem}.sidebar{max-height:none;padding-right:0;display:none;position:static}.sidebar.is-open{border-bottom:1px solid var(--color-border);margin-bottom:1rem;padding-bottom:1rem;display:block}.navbar__toggle{display:flex}.navbar__nav{top:var(--navbar-height);background:var(--color-surface);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-lg);flex-direction:column;padding:1rem;display:none;position:absolute;left:0;right:0}.navbar__nav.is-open{display:flex}.navbar__links{flex-direction:column;width:100%}.search-form__input,.search-form{width:100%}.site-footer__inner{text-align:center;flex-direction:column}}