nav.navbar .nav-links-flat{display:flex;align-items:center;gap:var(--s1);flex:1 1 auto;min-width:0}.nav-links-flat a{display:inline-flex;align-items:center;min-height:32px;font-family:var(--font-sans);font-size:var(--fs-md);font-weight:600;color:var(--text-secondary);padding:6px 12px;border-radius:var(--r-full);text-decoration:none;white-space:nowrap;transition:color var(--d2) var(--ease),background var(--d2) var(--ease)}.nav-rail-link{justify-content:center;gap:var(--s2);flex:0 0 auto}.nav-ico{width:18px;height:18px;flex:0 0 auto;display:block}.nav-lbl{white-space:nowrap}.nav-links-flat a:hover{color:var(--frost);background:var(--hairline);text-shadow:0 0 14px color-mix(in srgb,var(--mint) 80%,transparent)}.nav-links-flat a:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}.nav-links-flat a.is-active{color:var(--accent);font-weight:600}.nav-hamburger{display:none;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:1px solid var(--border);border-radius:var(--r-md);color:var(--text);cursor:pointer;flex-shrink:0;order:-1;min-height:32px;transition:background var(--d2) var(--ease),border-color var(--d2) var(--ease)}.nav-hamburger:hover{background:var(--hairline);border-color:var(--border-strong)}.nav-hamburger:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}.nav-hamburger-icon .bar{transition:transform var(--d2) var(--ease-out),opacity var(--d2) var(--ease);transform-origin:center}body.ac-drawer-open .nav-hamburger-icon .bar-1{transform:translateY(5px) rotate(45deg)}body.ac-drawer-open .nav-hamburger-icon .bar-2{opacity:0}body.ac-drawer-open .nav-hamburger-icon .bar-3{transform:translateY(-5px) rotate(-45deg)}.ac-drawer-backdrop{position:fixed;inset:0;background:color-mix(in srgb,var(--bg-deep) 60%,transparent);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);opacity:0;visibility:hidden;transition:opacity var(--d3) var(--ease),visibility 0s var(--d3);z-index:1050}body.ac-drawer-open .ac-drawer-backdrop{opacity:1;visibility:visible;transition:opacity var(--d3) var(--ease),visibility 0s 0s}.ac-drawer{position:fixed;top:0;left:0;bottom:0;width:min(360px,85vw);background:var(--surface);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);border-right:1px solid var(--border);box-shadow:var(--e3);transform:translate(-100%);visibility:hidden;transition:transform var(--d3) var(--ease-out),visibility 0s var(--d3);z-index:1100;display:flex;flex-direction:column}body.ac-drawer-open .ac-drawer{transform:translate(0);visibility:visible;transition:transform var(--d3) var(--ease-out),visibility 0s 0s}.ac-drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 18px 14px;border-bottom:1px solid var(--hairline)}.ac-drawer-brand{font-family:var(--font-sans);font-weight:700;font-size:var(--fs-lg);color:var(--text);text-decoration:none;letter-spacing:-.01em}.ac-drawer-close{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;background:transparent;border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text-secondary);cursor:pointer;transition:background var(--d2) var(--ease),color var(--d2) var(--ease),border-color var(--d2) var(--ease)}.ac-drawer-close:hover{background:var(--hairline);color:var(--text);border-color:var(--border-strong)}.ac-drawer-search{position:relative;z-index:2;padding:12px 18px 4px}.ac-drawer-search .nav-search{display:block!important;width:100%;height:auto}.ac-drawer-search .nav-search-wrap,.ac-drawer-search .nav-search-wrap:hover,.ac-drawer-search .nav-search-wrap:focus-within{width:100%;height:42px;padding:0 14px}.ac-drawer-search .nav-search-wrap:not(:hover):not(:focus-within) .nav-search-input,.ac-drawer-search .nav-search-wrap .nav-search-input{width:auto;flex:1;opacity:1;pointer-events:auto}.ac-drawer-search .nav-search-kbd{display:none}.ac-drawer-search .nav-search-drop{left:0;right:0;width:auto;max-height:min(52vh,420px)}.ac-drawer-body{flex:1;overflow-y:auto;padding:8px 12px 28px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.ac-drawer-body::-webkit-scrollbar{width:4px}.ac-drawer-body::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--r-full)}.ac-drawer-section{margin:8px 0 4px}.ac-drawer-section-title{font-family:var(--font-sans);font-size:var(--fs-xs);letter-spacing:var(--caps-tracking);text-transform:uppercase;color:var(--text-muted);padding:12px 14px 6px}.ac-drawer-link{display:block;padding:12px 14px;border-radius:var(--r-sm);color:var(--text-secondary);font-family:var(--font-sans);font-size:var(--fs-md);font-weight:500;text-decoration:none;position:relative;transition:background var(--d1) var(--ease),color var(--d1) var(--ease)}.ac-drawer-link:hover,.ac-drawer-link:focus-visible{background:var(--hairline);color:var(--text);outline:none}.ac-drawer-link.is-active{color:var(--accent);font-weight:600}.ac-drawer-link.is-active:before{content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);width:3px;height:60%;background:var(--accent);border-radius:var(--r-full)}.ac-drawer-divider{height:1px;background:var(--hairline);margin:16px 14px}.ac-drawer-cta{display:block;margin:4px 14px 0;padding:13px 18px;background:var(--text);color:var(--text-inverse);border-radius:var(--r-full);font-family:var(--font-sans);font-size:var(--fs-md);font-weight:600;text-align:center;text-decoration:none;transition:background var(--d2) var(--ease),color var(--d2) var(--ease)}.ac-drawer-cta:hover{background:var(--accent);color:var(--text-inverse)}.ac-drawer-cta:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}body.ac-drawer-open{overflow:hidden;position:relative}nav.navbar.is-nav-measuring,nav.navbar.is-nav-measuring *{transition:none!important}nav.navbar[data-nav-fit="1"] .nav-links-flat{gap:2px}nav.navbar[data-nav-fit="1"] .nav-rail-link{font-size:var(--fs-base);padding:6px var(--s2);gap:6px}nav.navbar[data-nav-fit="1"] .nav-ico{width:17px;height:17px}nav.navbar[data-nav-fit="1"] .nav-search-kbd,nav.navbar[data-nav-fit="2"] .nav-search-kbd{display:none}nav.navbar[data-nav-fit="2"] .nav-links-flat{gap:2px}nav.navbar[data-nav-fit="2"] .nav-rail-link{font-size:var(--fs-sm);padding:6px;gap:var(--s1)}nav.navbar[data-nav-fit="2"] .nav-ico{width:16px;height:16px}nav.navbar[data-nav-fit="3"] .nav-links-flat,nav.navbar[data-nav-fit="4"] .nav-links-flat{gap:var(--s1)}nav.navbar[data-nav-fit="3"] .nav-rail-link,nav.navbar[data-nav-fit="4"] .nav-rail-link{width:34px;min-width:34px;height:34px;padding:0;gap:0}nav.navbar[data-nav-fit="3"] .nav-lbl,nav.navbar[data-nav-fit="4"] .nav-lbl{display:none}nav.navbar[data-nav-fit="3"] .nav-ico,nav.navbar[data-nav-fit="4"] .nav-ico{width:19px;height:19px}nav.navbar[data-nav-fit="3"] .nav-rail-link.is-active,nav.navbar[data-nav-fit="4"] .nav-rail-link.is-active{background:var(--accent-dim);box-shadow:inset 0 0 0 1px var(--border)}nav.navbar[data-nav-fit="4"] .logo-text{display:none}nav.navbar[data-nav-fit="5"] .nav-links-flat{display:none}nav.navbar[data-nav-fit="5"] .nav-hamburger{display:inline-flex}nav.navbar[data-nav-fit="5"] .logo-text{display:none}nav.navbar .nav-hamburger{margin-left:0}nav.navbar .nav-right{display:flex!important}@media (max-width: 1023px){.nav-right{gap:.45rem;margin-left:auto;margin-right:.25rem}[dir=rtl] .nav-right{margin-left:.25rem;margin-right:auto}nav.navbar .nav-right .btn-primary{display:none!important}nav.navbar .nav-search{display:none}.nav-right .nav-login{font-size:var(--fs-sm);padding:7px 12px;border:1px solid var(--border);border-radius:var(--r-full);white-space:nowrap}}@media (max-width: 767px){nav.navbar .logo-text{display:none}nav.navbar{padding:0 14px;gap:10px}}@media (prefers-reduced-motion: reduce){.ac-drawer,.ac-drawer-backdrop,.nav-hamburger-icon .bar,.nav-links-flat a,.nav-section-menu{transition:none!important}html{scroll-behavior:auto}}html{scroll-behavior:smooth}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}[id^=sec-],#learnChartWrap,#learnStats,.kn-category,.tab-section,.dn-section,.dash-section,[id^=sub-],main[tabindex="-1"],[role=main][tabindex="-1"]{scroll-margin-top:calc(var(--ac-chrome-h, 64px) + var(--s5))}.nav-flat-item{position:relative;display:inline-flex}.nav-section-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:200px;background:var(--ds-glass-pane),var(--surface);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);border:1px solid var(--border);border-top-color:#ffffff4d;border-radius:var(--r-md);box-shadow:var(--e3),var(--glass-bevel);padding:6px;z-index:1000;opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity var(--d2) var(--ease),transform var(--d2) var(--ease),visibility 0s var(--d2)}.nav-flat-item.is-flip .nav-section-menu,[dir=rtl] .nav-flat-item .nav-section-menu{left:auto;right:0}[dir=rtl] .nav-flat-item.is-flip .nav-section-menu{right:auto;left:0}.nav-section-menu:before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}.nav-flat-item.is-open .nav-section-menu,.nav-flat-item:hover .nav-section-menu,.nav-flat-item:focus-within .nav-section-menu{opacity:1;visibility:visible;transform:translateY(0);transition:opacity var(--d2) var(--ease),transform var(--d2) var(--ease),visibility 0s 0s}.nav-section-item{display:block;padding:9px 14px;border-radius:var(--r-sm);color:var(--text-secondary);font-family:var(--font-sans);font-size:var(--fs-base);font-weight:500;text-decoration:none;white-space:nowrap;transition:background var(--d1) var(--ease),color var(--d1) var(--ease)}.nav-section-menu .nav-section-item{display:block;width:100%;justify-content:flex-start;border-radius:var(--r-sm);padding:9px 14px;font-size:var(--fs-base);font-weight:500}.nav-section-item:hover,.nav-section-item:focus-visible{background:var(--hairline);color:var(--text);outline:none}.nav-section-item.is-sub{padding-left:26px;font-size:var(--fs-sm);color:var(--text-muted)}.ac-drawer-row{display:flex;align-items:center}.ac-drawer-row .ac-drawer-link{flex:1 1 auto}.ac-drawer-expand{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;margin-right:6px;padding:0;background:none;border:none;border-radius:var(--r-sm);color:var(--text-muted);cursor:pointer;transition:background var(--d1) var(--ease),color var(--d1) var(--ease),transform var(--d2) var(--ease)}.ac-drawer-expand:hover,.ac-drawer-expand:focus-visible{background:var(--hairline);color:var(--text);outline:none}.ac-drawer-expand.is-open{transform:rotate(180deg)}.ac-drawer-sublist{display:flex;flex-direction:column;margin:2px 0 6px;padding-left:8px;border-left:1px solid var(--border)}.ac-drawer-sublink{display:block;padding:9px 14px;border-radius:var(--r-sm);color:var(--text-muted);font-family:var(--font-sans);font-size:var(--fs-base);font-weight:500;text-decoration:none;transition:background var(--d1) var(--ease),color var(--d1) var(--ease)}.ac-drawer-sublink:hover,.ac-drawer-sublink:focus-visible{background:var(--hairline);color:var(--text);outline:none}.ac-drawer-sublink.is-sub{padding-left:28px;font-size:var(--fs-sm);opacity:.9}.ac-drawer-langs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:4px 0 12px}.ac-drawer-lang{display:flex;flex-direction:column;align-items:center;gap:2px;background:var(--surface);border:1px solid var(--hairline);border-radius:var(--r-sm);padding:8px 4px;cursor:pointer;color:var(--text-secondary);transition:border-color var(--d2) var(--ease),color var(--d2) var(--ease)}.ac-drawer-lang-flag{font-size:var(--fs-lg);line-height:1}.ac-drawer-lang-code{font-family:var(--font-sans);font-size:var(--fs-xs);letter-spacing:var(--caps-tracking)}.ac-drawer-lang.is-active{border-color:transparent;color:var(--bg-deep);background:linear-gradient(120deg,var(--emerald),var(--mint));box-shadow:var(--glass-glow)}.ac-drawer-lang:hover{border-color:var(--border);color:var(--text)}@media (max-width: 520px){.logo-text{display:none}.navbar{padding-left:16px;padding-right:10px}}nav.navbar .nav-beta{flex:0 0 auto;display:inline-flex;align-items:center;align-self:center;min-height:0;height:18px;padding:0 6px;gap:0;font-family:var(--font-sans);font-size:10px;font-weight:700;line-height:1;letter-spacing:.07em;text-transform:uppercase;border-radius:4px;color:var(--accent-bright);background:color-mix(in srgb,var(--accent) 15%,transparent);border:1px solid color-mix(in srgb,var(--accent) 34%,transparent);box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none;pointer-events:none;-webkit-user-select:none;user-select:none}html[data-theme=light] nav.navbar .nav-beta{color:var(--accent-bright);background:var(--accent-dim);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}nav.navbar[data-nav-fit="4"] .nav-beta,nav.navbar[data-nav-fit="5"] .nav-beta{padding:0 4px}nav.navbar .logo-text{font-size:var(--fs-lg)}nav.navbar .nav-search-wrap{width:38px;height:38px}nav.navbar .nav-search-icon{width:15px;height:15px}nav.navbar .nav-search-input::placeholder{color:var(--text-secondary)}nav.navbar .nav-search-kbd{font-size:var(--fs-sm);padding:2px 6px}nav.navbar .pcg-btn,nav.navbar .notif-bell-btn{width:34px;height:34px}nav.navbar .pcg-btn svg,nav.navbar .notif-bell-btn svg{width:18px;height:18px}nav.navbar .notif-bell-badge{min-width:18px;height:18px;font-size:var(--fs-xs);line-height:18px}nav.navbar .nav-avatar-img:not(.nav-account-header-avatar),nav.navbar .nav-avatar-init:not(.nav-account-header-avatar){width:28px;height:28px}nav.navbar .nav-avatar-init:not(.nav-account-header-avatar){font-size:var(--fs-sm)}@media (min-width: 1760px){nav.navbar{padding-left:20px;padding-right:20px;gap:1rem}}@media (prefers-reduced-motion: no-preference){@media (hover: hover) and (pointer: fine){nav.navbar .logo img{transform-origin:50% 65%;backface-visibility:hidden}nav.navbar .logo:hover img{animation:ac-logo-greet .62s cubic-bezier(.22,.9,.28,1) 1}@keyframes ac-logo-greet{0%{transform:rotate(0) scale(1)}28%{transform:rotate(-9deg) scale(1.1)}55%{transform:rotate(6deg) scale(1.05)}78%{transform:rotate(-2deg) scale(1.01)}to{transform:rotate(0) scale(1)}}@supports ((-webkit-background-clip: text) or (background-clip: text)){nav.navbar .logo:hover .logo-text{background-image:linear-gradient(100deg,var(--text) 0%,var(--text) 42%,var(--accent-bright) 50%,var(--text) 58%,var(--text) 100%);background-size:300% 100%;background-position:0% 0;background-repeat:no-repeat;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:ac-logo-shine .62s ease-out 1}}@keyframes ac-logo-shine{0%{background-position:0% 0}to{background-position:100% 0}}}}@media (max-width: 400px){nav.navbar{padding-left:12px;padding-right:8px;gap:var(--s2)}nav.navbar .logo{gap:var(--s1)}nav.navbar .nav-right{gap:var(--s1);margin-right:0}nav.navbar .nav-right .nav-login{padding:7px var(--s2)}nav.navbar .pcg-btn,nav.navbar .notif-bell-btn,nav.navbar .nav-hamburger{min-width:44px;min-height:44px;box-sizing:border-box}nav.navbar .pcg-btn,nav.navbar .notif-bell-btn{width:44px;height:44px}nav.navbar .nav-hamburger{width:44px;height:44px}}nav.navbar .logo,nav.navbar .nav-logo{min-height:44px;display:inline-flex;align-items:center}html[data-theme=light] nav.navbar,html[data-theme=light] .navbar{background:var(--bg-card);border-bottom:1px solid var(--hairline);box-shadow:0 1px #06231a0d,0 6px 16px -12px #06231a73}html[data-theme=light] .navbar:after{opacity:.45}html[data-theme=light] nav.navbar .nav-search-wrap{border-color:var(--border);box-shadow:inset 0 1px 2px #06231a0e}html[data-theme=light] nav.navbar .nav-search-wrap:focus-within{border-color:var(--accent);box-shadow:inset 0 1px 2px #06231a0e,0 0 0 3px #00794f26}html[data-theme=light] .nav-links-flat a:hover{text-shadow:none}html[data-theme=light] nav.navbar[data-nav-fit="3"] .nav-rail-link.is-active,html[data-theme=light] nav.navbar[data-nav-fit="4"] .nav-rail-link.is-active{box-shadow:inset 0 0 0 1px var(--accent)}html[data-theme=light] nav.navbar .pcg-btn:hover,html[data-theme=light] nav.navbar .notif-bell-btn:hover,html[data-theme=light] nav.navbar .nav-hamburger:hover{background:var(--bg-secondary);border-color:var(--border-strong);color:var(--text)}html[data-theme=light] .nav-section-menu{background:var(--surface-raised);backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--border-default);border-top-color:var(--border-default);box-shadow:var(--e3)}html[data-theme=light] .ac-drawer-backdrop{background:#0a241961;backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}html[data-theme=light] .ac-drawer{background:var(--bg-card);backdrop-filter:none;-webkit-backdrop-filter:none;border-right-color:var(--border-default)}html[data-theme=light] .ac-drawer-lang.is-active{box-shadow:none}html[data-theme=light] .ac-drawer-lang{background:var(--bg-surface-3)}.pcg-panel{width:340px;background-color:var(--bg-elevated);background-image:var(--ds-glass-bg)}@media (max-width: 719px){.pcg-panel{position:fixed;top:calc(72px + env(safe-area-inset-top,0px));left:12px;right:12px;width:auto;max-width:none}}.pcg-tabs{display:flex;flex-wrap:wrap;gap:var(--s1);margin-bottom:var(--s3);padding-bottom:var(--s3);border-bottom:1px solid var(--border)}.pcg-tab{min-height:32px;padding:0 var(--s3);font-family:var(--font-sans);font-size:var(--fs-xs);font-weight:600;color:var(--text-secondary);background:transparent;border:1px solid var(--border);border-radius:var(--r-full);cursor:pointer;white-space:nowrap;transition:color var(--d2) var(--ease),background var(--d2) var(--ease),border-color var(--d2) var(--ease)}.pcg-tab:hover{color:var(--text);border-color:var(--border-strong)}.pcg-tab.is-active{color:var(--accent-bright);background:var(--accent-dim);border-color:color-mix(in srgb,var(--accent) 40%,transparent)}.pcg-tab:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}.pcg-field--wide{grid-column:1 / -1}.pcg-side{display:flex;gap:var(--s1)}.pcg-side-btn{flex:1 1 0;min-height:32px;font-family:var(--font-sans);font-size:var(--fs-xs);font-weight:600;color:var(--text-secondary);background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--r-sm);cursor:pointer;transition:color var(--d2) var(--ease),background var(--d2) var(--ease),border-color var(--d2) var(--ease)}.pcg-side-btn.is-active{color:var(--accent-bright);background:var(--accent-dim);border-color:color-mix(in srgb,var(--accent) 40%,transparent)}.pcg-side-btn:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px}.pcg-msg{margin-top:var(--s3);font-family:var(--font-sans);font-size:var(--fs-xs);line-height:1.4;color:var(--warning)}.pcg-msg[hidden]{display:none}nav.navbar:not([data-nav-fit="3"]):not([data-nav-fit="4"]) .nav-links-flat .nav-rail-link .nav-ico{display:none}nav.navbar:not([data-nav-fit="3"]):not([data-nav-fit="4"]) .nav-links-flat .nav-rail-link{gap:0}.nav-links-flat .nav-rail-link{font-size:var(--fs-lg)}nav.navbar[data-nav-fit="1"] .nav-rail-link{font-size:var(--fs-md)}nav.navbar[data-nav-fit="2"] .nav-rail-link{font-size:var(--fs-base)}.ac-skip{position:fixed;top:0;left:0;z-index:10000;transform:translateY(calc(-100% - 64px));display:inline-flex;align-items:center;min-height:44px;margin:8px;padding:0 18px;border-radius:var(--r-full, 999px);background:var(--accent-bright, #7ff5c0);color:var(--bg-deep, #030f0a);font-family:var(--font-sans);font-size:var(--fs-sm, 13px);font-weight:700;text-decoration:none;box-shadow:0 8px 28px #00000073;transition:transform .14s var(--ease, ease)}.ac-skip:focus,.ac-skip:focus-visible{transform:translateY(0)!important;outline:2px solid var(--bg-deep, #030f0a);outline-offset:-4px}@media (prefers-reduced-motion: reduce){.ac-skip{transition:none}}main:focus,[role=main]:focus,#ac-main:focus{outline:none}