.mobile-drawer-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,.5);z-index:1100;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease}.mobile-drawer-backdrop.open{opacity:1;visibility:visible}.mobile-drawer{position:fixed;top:0;left:0;bottom:0;width:300px;max-width:85vw;background-color:var(--rfc-bg);z-index:1200;transform:translateX(-100%);transition:transform .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;box-shadow:4px 0 20px rgba(0,0,0,.15)}.mobile-drawer.open{transform:translateX(0)}.mobile-drawer-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--rfc-border-light);flex-shrink:0}.mobile-drawer-title{font-weight:600;font-size:1.125rem;color:var(--rfc-text)}.mobile-drawer-close{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:transparent;color:var(--rfc-text-secondary);cursor:pointer;border-radius:8px;transition:background-color .2s ease,color .2s ease}.mobile-drawer-close:hover{background-color:var(--rfc-sidebar-hover);color:var(--rfc-text)}.mobile-drawer-content{flex:1 1;overflow-y:auto;padding:var(--spacing-md) 0;-webkit-overflow-scrolling:touch}.mobile-drawer-section{padding:var(--spacing-sm) var(--spacing-lg);margin-bottom:var(--spacing-md)}.mobile-drawer-section-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--rfc-text-muted);margin-bottom:var(--spacing-sm);padding:0 var(--spacing-sm)}.mobile-drawer-nav{list-style:none;margin:0;padding:0}.mobile-drawer-nav li{margin-bottom:2px}.mobile-drawer-link{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);text-decoration:none;color:var(--rfc-text-secondary);font-size:.9375rem;border-radius:6px;transition:all .2s ease}.mobile-drawer-link:hover{background-color:var(--rfc-sidebar-hover);color:var(--rfc-text)}.mobile-drawer-link.active{background-color:var(--rfc-sidebar-active);color:var(--rfc-link);font-weight:500}.mobile-drawer-link.nested{padding-left:var(--spacing-xl);font-size:.875rem;color:var(--rfc-text-muted)}.mobile-drawer-link.nested.active{color:var(--rfc-link)}.mobile-drawer-label{display:block;padding:var(--spacing-sm) var(--spacing-md);color:var(--rfc-text);font-size:.9375rem;font-weight:500}.mobile-drawer-nested{list-style:none;padding:0;margin:var(--spacing-xs) 0}.external-icon{opacity:.5;margin-left:auto}@media (min-width:901px){.mobile-drawer,.mobile-drawer-backdrop{display:none}}.mobile-toc-fab{display:none;position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;background-color:var(--rfc-link);color:#fff;border:none;cursor:pointer;z-index:1050;box-shadow:0 4px 12px rgba(0,0,0,.25);transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;align-items:center;justify-content:center}.mobile-toc-fab:hover{transform:scale(1.05);box-shadow:0 6px 16px rgba(0,0,0,.3)}.mobile-toc-fab:active{transform:scale(.95)}.mobile-toc-fab.active{background-color:var(--rfc-text-secondary)}.mobile-toc-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,.5);z-index:1100;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease}.mobile-toc-backdrop.open{opacity:1;visibility:visible}.mobile-toc-panel{position:fixed;top:0;right:0;bottom:0;width:300px;max-width:85vw;background-color:var(--rfc-bg);z-index:1200;transform:translateX(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;box-shadow:-4px 0 20px rgba(0,0,0,.15)}.mobile-toc-panel.open{transform:translateX(0)}.mobile-toc-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--rfc-border-light);flex-shrink:0}.mobile-toc-title{font-weight:600;font-size:1rem;color:var(--rfc-text)}.mobile-toc-close{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:transparent;color:var(--rfc-text-secondary);cursor:pointer;border-radius:8px;transition:background-color .2s ease,color .2s ease}.mobile-toc-close:hover{background-color:var(--rfc-sidebar-hover);color:var(--rfc-text)}.mobile-toc-content{flex:1 1;overflow-y:auto;padding:var(--spacing-lg);-webkit-overflow-scrolling:touch}.mobile-toc-list{list-style:none;margin:0;padding:0;counter-reset:toc-counter}.mobile-toc-item{margin-bottom:4px}.mobile-toc-item a{display:block;padding:var(--spacing-sm) var(--spacing-md);text-decoration:none;color:var(--rfc-text-secondary);font-size:.9375rem;border-radius:6px;border-left:3px solid transparent;transition:all .2s ease}.mobile-toc-item a:hover{background-color:var(--rfc-sidebar-hover);color:var(--rfc-text)}.mobile-toc-item a.active{background-color:var(--rfc-sidebar-active);color:var(--rfc-link);border-left-color:var(--rfc-link);font-weight:500}.mobile-toc-level-3 a{padding-left:calc(var(--spacing-md) + var(--spacing-md));font-size:.875rem}.mobile-toc-level-4 a{padding-left:calc(var(--spacing-md) + var(--spacing-xl));font-size:.8125rem}@media (max-width:1200px){.mobile-toc-fab{display:flex}}@media (min-width:1201px){.mobile-toc-backdrop,.mobile-toc-fab,.mobile-toc-panel{display:none}}@media (max-width:400px){.mobile-toc-fab{bottom:16px;right:16px;width:48px;height:48px}.mobile-toc-fab svg{width:20px;height:20px}}.theme-toggle{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:transparent;border:1px solid var(--color-border-default);border-radius:var(--radius-md);cursor:pointer;font-family:var(--font-sans);font-size:var(--text-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);transition:all var(--transition-base) var(--transition-timing);position:relative;overflow:hidden}.theme-toggle:hover{background:var(--color-bg-secondary);border-color:var(--color-border-dark);color:var(--color-text-primary);transform:translateY(-1px)}.theme-toggle:active{transform:translateY(0)}.theme-toggle:focus{outline:none;box-shadow:0 0 0 3px var(--color-wdp-primary-light);border-color:var(--color-wdp-primary)}.theme-toggle:focus:not(:focus-visible){box-shadow:none;border-color:var(--color-border-default)}.theme-toggle__icon-wrapper{display:flex;align-items:center;justify-content:center;width:20px;height:20px;position:relative}.theme-toggle__icon{width:100%;height:100%;color:currentColor;transition:all var(--transition-base) var(--transition-timing)}.theme-toggle__icon--sun{animation:rotate-in .3s var(--transition-timing)}@keyframes rotate-in{0%{transform:rotate(-90deg) scale(.8);opacity:0}to{transform:rotate(0deg) scale(1);opacity:1}}.theme-toggle__icon--moon{animation:slide-in .3s var(--transition-timing)}@keyframes slide-in{0%{transform:translateY(-10px) scale(.8);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.theme-toggle__icon--auto{animation:fade-in .3s var(--transition-timing)}@keyframes fade-in{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.theme-toggle__label{line-height:1;-webkit-user-select:none;-moz-user-select:none;user-select:none;white-space:nowrap}@media (max-width:640px){.theme-toggle__label{display:none}.theme-toggle{padding:var(--space-2)}}[data-theme=dark] .theme-toggle{border-color:var(--color-border-light)}[data-theme=dark] .theme-toggle:hover{background:var(--color-bg-tertiary);border-color:var(--color-border-default)}[data-theme=dark] .theme-toggle:focus{box-shadow:0 0 0 3px rgba(245,158,11,.3)}@media (prefers-contrast:high){.theme-toggle,.theme-toggle:hover{border-width:2px}}@media (prefers-reduced-motion:reduce){.theme-toggle,.theme-toggle__icon{transition:none}.theme-toggle__icon--auto,.theme-toggle__icon--moon,.theme-toggle__icon--sun{animation:none}.theme-toggle:hover{transform:none}}.header{position:-webkit-sticky;position:sticky;top:0;z-index:var(--z-index-sticky);background-color:var(--color-bg-primary);border-bottom:1px solid var(--color-border-default);box-shadow:var(--shadow-sm)}.header__container{display:flex;align-items:center;justify-content:space-between;height:var(--layout-header-height);gap:var(--space-4)}.header__logo{display:flex;align-items:center;gap:var(--space-2);text-decoration:none;color:var(--color-text-primary);font-weight:var(--font-weight-bold);font-size:var(--text-xl);transition:opacity var(--transition-fast) var(--transition-timing)}.header__logo:hover{opacity:.8}.header__logo-icon{font-size:var(--text-3xl);line-height:1}.header__logo-text{font-family:var(--font-display);letter-spacing:-.02em}.header__nav{display:flex;align-items:center;gap:var(--space-6);flex:1 1;justify-content:center}.header__nav-link{color:var(--color-text-secondary);text-decoration:none;font-weight:var(--font-weight-medium);font-size:var(--text-base);transition:color var(--transition-fast) var(--transition-timing);padding:var(--space-2) 0;position:relative}.header__nav-link:hover{color:var(--color-wdp-primary)}.header__nav-link:after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background-color:var(--color-wdp-primary);transform:scaleX(0);transition:transform var(--transition-base) var(--transition-timing)}.header__nav-link:hover:after{transform:scaleX(1)}.header__nav-link--active{color:var(--color-wdp-primary)}@media (max-width:768px){.header__container{padding-left:var(--space-4);padding-right:var(--space-4)}.header__nav{gap:var(--space-4)}.header__nav-link{font-size:var(--text-sm)}.header__logo-text,.hide-on-mobile{display:none}}