.lang-dropdown-root[data-astro-cid-l4evwy7q]{user-select:none;display:inline-block;position:relative}.lang-trigger-btn[data-astro-cid-l4evwy7q]{background:var(--color-fill);border:1px solid var(--color-border);border-radius:var(--radius-full);min-height:32px;color:var(--color-text);cursor:pointer;box-sizing:border-box;align-items:center;gap:.45rem;padding:.25rem .65rem;font-family:inherit;font-size:.8125rem;font-weight:600;line-height:1;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex}.lang-trigger-btn[data-astro-cid-l4evwy7q]:hover{background:var(--color-surface);border-color:var(--color-border-strong);box-shadow:0 1px 3px #00000014}.lang-trigger-btn[data-astro-cid-l4evwy7q][aria-expanded=true]{background:var(--color-surface);border-color:var(--color-brand);box-shadow:0 0 0 3px #0b6bcb26}.lang-trigger-flag[data-astro-cid-l4evwy7q]{font-size:1rem;line-height:1}.lang-trigger-code[data-astro-cid-l4evwy7q]{letter-spacing:.02em;font-weight:700;display:none}.lang-trigger-name[data-astro-cid-l4evwy7q]{color:var(--color-text);font-size:.8125rem}.lang-trigger-chevron[data-astro-cid-l4evwy7q]{color:var(--color-text-secondary);transition:transform .2s}.lang-trigger-btn[data-astro-cid-l4evwy7q][aria-expanded=true] .lang-trigger-chevron[data-astro-cid-l4evwy7q]{transform:rotate(180deg)}.lang-menu-panel[data-astro-cid-l4evwy7q]{background:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(16px);z-index:1000;min-width:260px;max-width:320px;padding:.35rem 0;animation:.15s cubic-bezier(.16,1,.3,1) langFadeIn;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 10px 25px -5px #00000026,0 8px 10px -6px #0000001a}@keyframes langFadeIn{0%{opacity:0;transform:translateY(-4px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.lang-menu-header[data-astro-cid-l4evwy7q]{text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary);border-bottom:1px solid var(--color-border-subtle);margin-bottom:.25rem;padding:.4rem .85rem .35rem;font-size:.6875rem;font-weight:700}.lang-list[data-astro-cid-l4evwy7q]{max-height:380px;margin:0;padding:0;list-style:none;overflow-y:auto}.lang-menu-item[data-astro-cid-l4evwy7q]{width:100%;color:var(--color-text);text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:.65rem;padding:.55rem .85rem;font-family:inherit;transition:background-color .12s;display:flex}.lang-menu-item[data-astro-cid-l4evwy7q]:hover,.lang-menu-item[data-astro-cid-l4evwy7q]:focus-visible{background:var(--color-fill);outline:none}.lang-menu-item[data-astro-cid-l4evwy7q].is-active{color:var(--color-brand);background:light-dark(#0b6bcb14,#409cff26);font-weight:600}.item-flag[data-astro-cid-l4evwy7q]{flex-shrink:0;font-size:1.15rem;line-height:1}.item-text[data-astro-cid-l4evwy7q]{flex-direction:column;flex:1;gap:.1rem;min-width:0;display:flex}.item-name[data-astro-cid-l4evwy7q]{color:var(--color-text);font-size:.8125rem;font-weight:600}.lang-menu-item[data-astro-cid-l4evwy7q].is-active .item-name[data-astro-cid-l4evwy7q]{color:var(--color-brand)}.item-sub[data-astro-cid-l4evwy7q]{color:var(--color-text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:.6875rem;overflow:hidden}.item-check[data-astro-cid-l4evwy7q]{color:var(--color-brand);flex-shrink:0}@media (width<=768px){.lang-trigger-name[data-astro-cid-l4evwy7q]{display:none}.lang-trigger-code[data-astro-cid-l4evwy7q]{display:inline}.lang-trigger-btn[data-astro-cid-l4evwy7q]{gap:.3rem;padding:.2rem .5rem}.lang-menu-panel[data-astro-cid-l4evwy7q]{min-width:240px;right:-10px}}@layer base{:root{color-scheme:light dark;--color-bg:light-dark(#f5f5f7,#000);--color-surface:light-dark(#fff,#1c1c1e);--color-fill:light-dark(#0000000a,#ffffff14);--color-fill-strong:light-dark(#00000014,#ffffff26);--color-bg-subtle:var(--color-fill);--color-text:light-dark(#1d1d1f,#f5f5f7);--color-text-secondary:light-dark(#636366,#a1a1a6);--color-muted:light-dark(#6e6e73,#8e8e93);--color-border:light-dark(#00000014,#ffffff1a);--color-border-subtle:light-dark(#0000000a,#ffffff0f);--color-border-strong:light-dark(#00000029,#ffffff38);--color-ring:light-dark(#0000000a,#ffffff14);--color-media-outline:light-dark(#0000000f,#ffffff1f);--color-shadow:light-dark(#0000000a,#00000073);--color-shadow-strong:light-dark(#0000001f,#000000bf);--color-brand:light-dark(#0071e3,#2997ff);--color-brand-hover:light-dark(#0077ed,#0071e3);--color-on-brand:#fff;--color-brand-ring:color-mix(in srgb, var(--color-brand) 20%, transparent);--font-heading:var(--font-body);--font-weight-heading:600;--font-weight-display:600;--font-size-label:.75rem;--font-size-xs:.8125rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:2rem;--font-size-4xl:2.5rem;--font-size-5xl:3.5rem;--font-size-display:clamp(2.25rem, 1.6rem + 2.6vw, 3.5rem);--leading-tight:1.1;--leading-snug:1.3;--leading-normal:1.5;--leading-relaxed:1.7;--tracking-tight:-.035em;--tracking-snug:-.02em;--tracking-wide:.06em;--tracking-wider:.08em;--spacing-1:.25rem;--spacing-2:.5rem;--spacing-3:.75rem;--spacing-4:1rem;--spacing-5:1.25rem;--spacing-6:1.5rem;--spacing-8:2rem;--spacing-10:2.5rem;--spacing-12:3rem;--spacing-16:4rem;--spacing-20:5rem;--spacing-24:6rem;--spacing-xs:var(--spacing-1);--spacing-sm:var(--spacing-2);--spacing-md:var(--spacing-4);--spacing-lg:var(--spacing-6);--spacing-xl:var(--spacing-8);--spacing-2xl:var(--spacing-12);--spacing-3xl:var(--spacing-16);--content-width:680px;--wide-width:1200px;--max-width:var(--content-width);--frame-margin:clamp(.75rem, 3vw, 2rem);--frame-padding:clamp(1rem, 3vw, 2rem);--frame-width:min(100% - 2 * var(--frame-margin), var(--wide-width));--gutter-width:200px;--meta-col-width:180px;--nav-height:64px;--search-input-width:200px;--radius-xs:4px;--radius-sm:8px;--radius:12px;--radius-lg:16px;--radius-xl:22px;--radius-2xl:26px;--radius-full:9999px;--card-padding:8px;--ease-apple:cubic-bezier(.16, 1, .3, 1);--ease-out:cubic-bezier(.16, 1, .3, 1);--transition-fast:.15s var(--ease-apple);--transition-base:.24s var(--ease-apple);--transition-smooth:.35s var(--ease-apple);--avatar-size-xs:20px;--avatar-size-sm:24px;--avatar-size-md:32px;--avatar-size-lg:40px;--tag-padding-y:3px;--shadow-xs:light-dark(0 1px 2px #0000000a,0 1px 2px #0000004d);--shadow-sm:light-dark(0 2px 6px #0000000a,0 2px 8px #00000059);--shadow-card:light-dark(0 2px 10px #00000008,0 4px 18px #00000073);--shadow-card-hover:light-dark(0 12px 30px -4px #00000014,0 16px 36px #000000a6);--shadow-lg:light-dark(0 20px 40px -8px #0000001a,0 24px 50px #000c)}@supports not (color:light-dark(#000, #fff)){:root{color-scheme:light;--color-bg:#f5f5f7;--color-surface:#fff;--color-fill:#0000000a;--color-fill-strong:#00000014;--color-text:#1d1d1f;--color-text-secondary:#86868b;--color-muted:#a1a1a6;--color-border:#00000014;--color-border-subtle:#0000000a;--color-border-strong:#00000029;--color-ring:#0000000a;--color-media-outline:#0000000f;--color-shadow:#0000000a;--color-shadow-strong:#0000001a;--color-brand:#0071e3;--color-brand-hover:#0077ed;--color-on-brand:#fff}}.prose{--prose-color:color-mix(in srgb, var(--color-text) 82%, var(--color-bg));max-width:var(--content-width);font-size:var(--font-size-lg);color:var(--prose-color);overflow-wrap:break-word;text-align:justify;text-justify:inter-word;hyphens:auto;line-height:1.75}.prose :is(h1,h2,h3,h4,h5,h6){text-align:start;hyphens:none}.prose>*{margin-block:0}.prose>*+*{margin-block-start:1.5em}.prose>:is(h1,h2){margin-block-start:3em}.prose>:is(h3,h4,h5,h6){margin-block-start:2.5em}.prose>:is(h1,h2,h3,h4,h5,h6)+*{margin-block-start:1em}.prose p{text-wrap:pretty}.prose>:first-child{margin-block-start:0}.prose :is(h1,h2,h3,h4,h5,h6){color:var(--color-text);line-height:var(--leading-snug)}.prose h6{color:var(--color-text-secondary)}.prose a{color:var(--color-link);text-decoration-skip-ink:auto;text-underline-offset:.2em;font-weight:500;text-decoration-line:underline;text-decoration-color:currentColor;text-decoration-thickness:1.5px}.prose a:hover{color:var(--color-link-hover)}.prose :is(strong,b){color:var(--color-text);font-weight:600}.prose :is(sub,sup){font-size:.75em;line-height:0}.prose :not(pre)>code{border-radius:var(--radius-sm);background:var(--color-fill);color:var(--color-text);font-family:var(--font-mono);-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:.15em .35em;font-size:.85em}.prose :is(ul,ol){padding-inline-start:1.5em}.prose li{padding-inline-start:.25em}.prose li+li,.prose li>:is(ul,ol){margin-block-start:.65em}.prose li::marker{color:var(--color-muted);font-variant-numeric:tabular-nums}.prose blockquote{border-inline-start:2px solid var(--color-border-strong);color:var(--color-text);padding-inline-start:1.25em}.prose blockquote>*+*{margin-block-start:.75em}.prose hr{border:0;border-block-start:1px solid var(--color-border);margin-block:2.5em}.prose img{border-radius:var(--radius-lg)}.prose .sign-figure{text-align:center;max-width:160px;margin-inline:auto}.prose .sign-figure img{width:120px;height:auto;margin-inline:auto;display:block}.prose :is(figure>img,figure>a>img){outline:1px solid var(--color-media-outline);outline-offset:-1px}.prose figcaption{color:var(--color-muted);font-size:var(--font-size-sm);line-height:var(--leading-normal);text-align:center;margin-block-start:.75em}.prose :is(iframe,video){border-radius:var(--radius-lg);background:var(--color-fill);overflow:hidden}.prose table{border-collapse:collapse;width:100%;margin-block:1.5em}.prose th,.prose td{border:1px solid var(--color-border);text-align:left;padding:.75rem 1rem}.prose th{background:var(--color-fill);font-weight:600}@media (width<=640px){.prose{font-size:1.0625rem;line-height:1.7}}a{color:inherit;text-decoration:none}}@font-face{font-family:Inter;font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/inter-latin.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Inter;font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/inter-latin-ext.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-weight:400 800;font-display:swap;src:url(/fonts/inter-vietnamese.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}:root{--font-body:"Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading:"Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--font-size-label:.72rem;--font-size-xs:.78rem;--font-size-sm:.88rem;--font-size-base:1rem;--font-size-lg:1.12rem;--font-size-xl:1.25rem;--font-size-2xl:1.4rem;--font-size-3xl:1.65rem;--font-size-4xl:1.9rem;--font-size-5xl:2.15rem;--font-size-display:clamp(1.45rem, 1.15rem + 1.5vw, 2rem);--leading-tight:1.2;--leading-snug:1.35;--leading-normal:1.55;--leading-relaxed:1.7;--color-brand:light-dark(#0071e3,#2997ff);--color-brand-hover:light-dark(#0077ed,#0071e3);--color-on-brand:#fff;--color-link:light-dark(#0071e3,#2997ff);--color-link-hover:light-dark(#0077ed,#70baff);--radius-sm:8px;--radius:12px;--radius-lg:16px;--radius-xl:22px;--radius-2xl:26px;--radius-full:9999px;--btn-min-height:40px;--btn-pad-y:.55rem;--btn-pad-x:1.25rem;--btn-font-size:.875rem;--btn-font-weight:600;--btn-radius:var(--radius-full);--badge-min-height:22px;--badge-radius:var(--radius-full)}h1{letter-spacing:-.025em;font-size:clamp(1.45rem,1.2rem + 1vw,1.75rem);font-weight:700;line-height:1.25}h2{letter-spacing:-.02em;font-size:1.3rem;font-weight:650;line-height:1.3}h3{letter-spacing:-.015em;font-size:1.125rem;font-weight:600;line-height:1.35}h4{letter-spacing:-.01em;font-size:1rem;font-weight:600;line-height:1.4}h5,h6{font-size:.95rem;font-weight:600;line-height:1.4}p,li,blockquote,dd,.prose,.prose p,.prose li,.prose blockquote,.desc,[class*=-desc],[class*=-summary],[class*=-intro],[class*=-subtitle],[class*=-text],[class*=-explanation],[class*=-body],[class*=-content],[class*=-rules],[class*=-rule],[class*=-faq],.quiz-prompt,.quiz-prompt-sub,.slide-prompt p,.option-text,.option-text-sub,.reveal-rule p,.reveal-rule-sub,.reveal-explanation,.reveal-explanation-sub,.reveal-answer,.ex-option-text,.ex-option-text-sub,.ex-option-content,.ex-q-text,.ex-q-text-sub,.ex-q-prompt,.ex-q-prompt-sub,.ex-explanation,.ex-review-exp,.ex-review-exp-sub,.ex-panel-desc,.ex-multi-hint,.ex-rules-list li,.ex-rules-list li span,.ex-faq-item p,.zc-text-de,.zc-text-sub,.zc-card-meaning p,.zc-card-rule p,.zc-legal-text,.sp-content,.sp-section p,.lesson-summary,.course-subtitle,.course-description,.hub-subtitle,.course-card-subtitle,.gdpr-text{text-align:justify;text-justify:inter-word;hyphens:auto}h1,h2,h3,h4,h5,h6,.prose :is(h1,h2,h3,h4,h5,h6),.course-title,.lesson-title,.ex-panel-title,.zc-card-name{text-align:start;hyphens:none}.btn,.btn *,.badge,.card-tag,.nav-link,.ex-badge,.ex-timer,.ex-dot,.dot-btn,.zc-rule-badge,.footer-inner,.footer-legal{text-align:center}.btn,.btn-primary,.btn-secondary,.btn-ghost{min-height:var(--btn-min-height);width:fit-content;max-width:100%;padding:var(--btn-pad-y) var(--btn-pad-x);font-size:var(--btn-font-size);font-weight:var(--btn-font-weight);border-radius:var(--btn-radius);cursor:pointer;user-select:none;border:1px solid #0000;justify-content:center;align-items:center;gap:.45rem;line-height:1.2;text-decoration:none;transition:background-color .18s cubic-bezier(.16,1,.3,1),border-color .18s cubic-bezier(.16,1,.3,1),color .18s cubic-bezier(.16,1,.3,1),box-shadow .18s cubic-bezier(.16,1,.3,1),transform .12s cubic-bezier(.16,1,.3,1);display:inline-flex}.btn:active:not(:disabled),.btn-primary:active:not(:disabled),.btn-secondary:active:not(:disabled),.btn-ghost:active:not(:disabled){transform:scale(.97)}.btn-primary{background:var(--color-brand);color:#fff;box-shadow:0 1px 3px #0071e340}.btn-primary:hover:not(:disabled){background:var(--color-brand-hover);box-shadow:0 4px 12px #0071e359}.btn-secondary{color:var(--color-text);border:1px solid var(--color-border);background:light-dark(#0000000d,#ffffff1a)}.btn-secondary:hover:not(:disabled){border-color:var(--color-border-strong);background:light-dark(#00000014,#ffffff29)}.btn-ghost{color:var(--color-text-secondary);background:0 0}.btn-ghost:hover:not(:disabled){color:var(--color-text);background:var(--color-fill)}.btn:disabled,.btn-primary:disabled,.btn-secondary:disabled,.btn-ghost:disabled{opacity:.45;cursor:not-allowed;transform:none}.badge,.ex-badge,.ex-panel-tag,.ex-bookmark-badge,.ex-mode-badge-indicator,.zc-rule-badge,.card-tag{min-height:var(--badge-min-height,22px);border-radius:var(--badge-radius,9999px);letter-spacing:.045em;text-align:center;vertical-align:middle;user-select:none;justify-content:center;align-items:center;gap:.35rem;width:fit-content;padding:.22rem .65rem .2rem;font-size:.72rem;font-weight:650;line-height:1.1;display:inline-flex;cursor:default!important;box-shadow:none!important;transition:none!important}.badge:hover,.ex-badge:hover,.ex-panel-tag:hover,.ex-bookmark-badge:hover,.ex-mode-badge-indicator:hover,.zc-rule-badge:hover,.card-tag:hover{box-shadow:none!important;transform:none!important}:where(main,article,.prose,.ex-explanation,.zc-card-rules,.ex-review,.ex-faq-ans,.footer-legal,.gdpr-text,.lesson-summary,.course-description) a:not([class*=btn]):not([class*=card]):not([class*=badge]):not([class*=nav-link]):not([class*=site-brand]):not([class*=option]):not([class*=dot-btn]):not([class*=ex-dot]):not([class*=brand-badge]){color:var(--color-link);text-underline-offset:3px;text-decoration:underline 1.2px;text-decoration-color:color-mix(in srgb, currentColor 35%, transparent);text-decoration-skip-ink:auto;transition:color .18s cubic-bezier(.16,1,.3,1),text-decoration-color .18s cubic-bezier(.16,1,.3,1)}:where(main,article,.prose,.ex-explanation,.zc-card-rules,.ex-review,.ex-faq-ans,.footer-legal,.gdpr-text,.lesson-summary,.course-description) a:not([class*=btn]):not([class*=card]):not([class*=badge]):not([class*=nav-link]):not([class*=site-brand]):not([class*=option]):not([class*=dot-btn]):not([class*=ex-dot]):not([class*=brand-badge]):hover{color:var(--color-link-hover);text-decoration-color:currentColor}.icon-svg{vertical-align:-2px;stroke-width:2px;stroke:currentColor;fill:none;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;transition:transform .2s cubic-bezier(.16,1,.3,1),stroke .2s,fill .2s;display:inline-block}.icon-tag{vertical-align:-1.5px;opacity:.9;margin-right:.35rem}.icon-arrow,.apple-arrow{vertical-align:-2px;flex-shrink:0;transition:transform .2s cubic-bezier(.16,1,.3,1);display:inline-block}.icon-arrow-left,.apple-arrow-left{margin-right:.3rem}.icon-arrow-right,.apple-arrow-right{margin-left:.3rem}button:hover:not(:disabled) .icon-arrow-right,button:hover:not(:disabled) .apple-arrow-right,a:hover .icon-arrow-right,a:hover .apple-arrow-right,.course-card:hover .icon-arrow-right,.course-card:hover .apple-arrow-right,.lesson-item:hover .icon-arrow-right,.lesson-item:hover .apple-arrow-right,.btn-lesson-nav.next:hover .icon-arrow-right,.btn-lesson-nav.next:hover .apple-arrow-right{transform:translate(3px)}button:hover:not(:disabled) .icon-arrow-left,button:hover:not(:disabled) .apple-arrow-left,a:hover .icon-arrow-left,a:hover .apple-arrow-left,.btn-lesson-nav.prev:hover .icon-arrow-left,.btn-lesson-nav.prev:hover .apple-arrow-left{transform:translate(-3px)}ins.adsbygoogle{max-width:100%;margin-inline:auto;text-decoration:none;display:block}ins.adsbygoogle iframe,.google-auto-placed iframe{max-width:100%!important}ins.adsbygoogle[data-ad-format=fluid],.google-auto-placed{min-height:100px}:where(main) p+p:not([class*=course-card]){margin-block-start:1.15em}:where(main) :is(p,ul,ol,blockquote)+:is(h1,h2,h3,h4,h5,h6):not([class*=card]){margin-block-start:1.75em}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-size:85%}:root[data-theme=dark],html.dark{color-scheme:dark}:root[data-theme=light],html.light{color-scheme:light}:focus-visible{outline:2px solid var(--color-brand);outline-offset:2px;box-shadow:0 0 0 3px color-mix(in srgb, var(--color-brand) 30%, transparent)}.sr-only{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.btn-nav,.ex-nav .ex-btn{min-height:var(--btn-min-height,40px);padding:var(--btn-pad-y,.55rem) var(--btn-pad-x,1.25rem);font-size:var(--btn-font-size,.875rem);font-weight:var(--btn-font-weight,600);border-radius:var(--btn-radius,var(--radius-full));cursor:pointer;user-select:none;justify-content:center;align-items:center;gap:.45rem;line-height:1.2;text-decoration:none;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex}.btn-nav:active:not(:disabled),.ex-nav .ex-btn:active:not(:disabled){transform:scale(.97)}.btn-prev,.btn-nav.btn-prev,#ex-prev-btn,.ex-btn-secondary{background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text);box-shadow:0 1px 2px #0000000a}.btn-prev:hover:not(:disabled),.btn-nav.btn-prev:hover:not(:disabled),#ex-prev-btn:hover:not(:disabled),.ex-btn-secondary:hover:not(:disabled){background:var(--color-fill);border-color:var(--color-border-strong);color:var(--color-text)}.btn-next,.btn-nav.btn-next,#ex-next-btn,.ex-btn-primary{background:var(--color-brand);color:#fff;border:1px solid #0000;box-shadow:0 1px 3px #0071e340}.btn-next:hover:not(:disabled),.btn-nav.btn-next:hover:not(:disabled),#ex-next-btn:hover:not(:disabled),.ex-btn-primary:hover:not(:disabled){background:var(--color-brand-hover);color:#fff;box-shadow:0 4px 12px #0071e359}.btn-nav:disabled,.btn-prev:disabled,.btn-next:disabled,#ex-prev-btn:disabled,#ex-next-btn:disabled,.ex-btn-secondary:disabled,.ex-btn-primary:disabled{opacity:.38;cursor:not-allowed;pointer-events:none;box-shadow:none;transform:none}.btn-bookmark{min-height:var(--btn-min-height,40px);padding:var(--btn-pad-y,.55rem) var(--btn-pad-x,1.15rem);font-size:var(--btn-font-size,.875rem);border-radius:var(--btn-radius,var(--radius-full));border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);cursor:pointer;user-select:none;justify-content:center;align-items:center;gap:.45rem;font-weight:600;line-height:1.2;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex;box-shadow:0 1px 2px #0000000a}.btn-bookmark:hover{border-color:color-mix(in srgb, #f59e0b 50%, var(--color-border));color:var(--color-text);background:color-mix(in srgb, #f59e0b 8%, var(--color-surface));box-shadow:0 2px 8px #f59e0b26}.btn-bookmark:active{transform:scale(.97)}.btn-bookmark svg{fill:#0000;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:16px;height:16px;transition:fill .2s,stroke .2s,transform .2s cubic-bezier(.16,1,.3,1)}.btn-bookmark.is-bookmarked{background:color-mix(in srgb, #f59e0b 14%, var(--color-surface));border-color:color-mix(in srgb, #f59e0b 50%, var(--color-border));color:light-dark(#b45309,#fbbf24);box-shadow:0 1px 4px #f59e0b33}.btn-bookmark.is-bookmarked svg{fill:#f59e0b;stroke:#f59e0b;transform:scale(1.1)}:root[data-theme=dark] .btn-bookmark.is-bookmarked{color:#fbbf24;background:#f59e0b2e;border-color:#f59e0b66}@media (width<=640px){.quiz-progress-meta-right .btn-reset-progress,.course-progress-header-right .btn-reset-progress{flex-shrink:0;margin-left:auto}}.ex-abort-row,.quiz-abort-row,.zc-quiz-abort-row{border-top:1px solid var(--color-border);justify-content:center;align-items:center;width:100%;margin-top:1.5rem;padding-top:1.25rem;display:flex}.btn-restart-action{width:fit-content;min-height:38px;color:var(--color-text-secondary);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-full);cursor:pointer;user-select:none;justify-content:center;align-items:center;gap:.5rem;padding:.45rem 1.25rem;font-size:.875rem;font-weight:600;line-height:1.2;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex;box-shadow:0 1px 2px #0000000a}.btn-restart-action:hover{color:light-dark(#d70015,#ff453a);border-color:color-mix(in srgb, #ff3b30 40%, var(--color-border));background:#ff3b301a;box-shadow:0 2px 8px #ff3b3026}.btn-restart-action:active{transform:scale(.97)}.btn-restart-action svg{stroke:currentColor;stroke-width:2.2px;width:15px;height:15px;transition:transform .3s cubic-bezier(.16,1,.3,1)}.btn-restart-action:hover svg{transform:rotate(-45deg)}html[lang=de] [data-lang-view]:not([data-lang-view=de]):not([data-lang-view=bilingual]),html[lang=vi] [data-lang-view]:not([data-lang-view=vi]):not([data-lang-view=bilingual]),html[lang=en] [data-lang-view]:not([data-lang-view=en]):not([data-lang-view=bilingual]){display:none!important}.prose pre{border-radius:var(--radius-lg);background:var(--color-fill);padding:1rem 1.25rem;overflow-x:auto}.prose code{color:var(--color-text);font-family:var(--font-mono);font-size:var(--font-size-sm);line-height:1.7}.quiz-slider-root{--lesson-column:860px;margin:2rem 0;font-family:inherit}@media (width>=908px){.quiz-slider-root{width:calc(100% + (var(--lesson-column) - var(--content-width,680px)))}}@media (width>=908px) and (width<=1024px){.quiz-slider-root{--lesson-column:720px}}@media (width>=1440px){.quiz-slider-root{--lesson-column:min(1100px, 100%);width:100%}}.quiz-loading{text-align:center;color:#64748b;background:#f8fafc;border:1px dashed #cbd5e1;border-radius:12px;padding:3rem 1.5rem}.quiz-spinner{border:3px solid #e2e8f0;border-top-color:#2563eb;border-radius:50%;width:32px;height:32px;margin:.25rem auto .9rem;animation:.8s linear infinite quizSpin}@keyframes quizSpin{to{transform:rotate(360deg)}}.quiz-container{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-card);padding:1.5rem;transition:all .25s cubic-bezier(.16,1,.3,1);overflow:hidden}[data-theme=dark] .quiz-container{background:var(--color-surface);border-color:var(--color-border);box-shadow:var(--shadow-card)}.quiz-header{margin-bottom:1.25rem}[data-theme=dark] .quiz-header{border-color:var(--color-border-subtle)}.quiz-nav-carousel{align-items:center;gap:.5rem;width:100%;margin-bottom:1rem;display:flex;position:relative}.quiz-nav-track{scrollbar-width:none;-ms-overflow-style:none;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;flex:1;align-items:center;min-width:0;padding:2px 0;display:flex;overflow:auto hidden}.quiz-nav-track::-webkit-scrollbar{display:none}.quiz-nav-dots{white-space:nowrap;flex-wrap:nowrap;align-items:center;gap:.375rem;margin:0;padding:0;display:inline-flex}.quiz-arrow-btn{border-radius:var(--radius-full);border:1px solid var(--color-border);background:var(--color-surface);width:28px;height:28px;color:var(--color-text);cursor:pointer;user-select:none;flex-shrink:0;justify-content:center;align-items:center;padding:0;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex;box-shadow:0 1px 2px #0000000d}[data-theme=dark] .quiz-arrow-btn{background:var(--color-fill);border-color:var(--color-border);color:var(--color-text);box-shadow:none}.quiz-arrow-btn:hover:not(:disabled){background:var(--color-fill);border-color:var(--color-brand);color:var(--color-brand);transform:scale(1.08)}.quiz-arrow-btn:active:not(:disabled){transform:scale(.92)}.quiz-arrow-btn:disabled{cursor:not-allowed}.dot-btn{border:1px solid var(--color-border);background:var(--color-fill);width:32px;height:32px;color:var(--color-text-secondary);cursor:pointer;user-select:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.775rem;font-weight:700;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex}[data-theme=dark] .dot-btn{background:var(--color-fill);border-color:var(--color-border);color:var(--color-text-secondary)}.dot-btn:hover{border-color:var(--color-brand);color:var(--color-brand);transform:scale(1.05)}.dot-btn:active{transform:scale(.95)}.dot-btn.active{background:var(--color-brand);border-color:var(--color-brand);color:#fff;box-shadow:0 2px 8px #0071e359}.dot-btn.answered:not(.active){border-color:color-mix(in srgb, #34c759 45%, var(--color-border));color:light-dark(#15803d,#30d158);background:#34c75924}[data-theme=dark] .dot-btn.answered:not(.active){color:#30d158;background:#30d15826;border-color:#30d15859}.quiz-progress-wrap{margin-top:.75rem}.quiz-progress-meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.35rem;font-size:.8125rem;display:flex}.quiz-progress-meta-right{flex-wrap:wrap;align-items:center;gap:.65rem;display:inline-flex}.btn-reset-progress{min-height:34px;color:var(--color-text-secondary);background:var(--color-fill);border:1px solid var(--color-border);border-radius:var(--radius-full);cursor:pointer;user-select:none;justify-content:center;align-items:center;gap:.45rem;padding:.35rem .95rem;font-size:.8125rem;font-weight:600;line-height:1.2;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex;box-shadow:0 1px 2px #0000000a}.btn-reset-progress:hover{color:#ff3b30;border-color:color-mix(in srgb, #ff3b30 40%, var(--color-border));background:#ff3b301a;box-shadow:0 2px 8px #ff3b3026}.btn-reset-progress:active{transform:scale(.97)}.btn-reset-progress svg{stroke:currentColor;stroke-width:2.2px;width:14px;height:14px;transition:transform .3s cubic-bezier(.16,1,.3,1)}.btn-reset-progress:hover svg{transform:rotate(-45deg)}.quiz-progress-label{color:var(--color-text-secondary);font-weight:600}.quiz-progress-text{color:var(--color-brand);font-variant-numeric:tabular-nums;font-weight:600}.quiz-progress-track{background:var(--color-fill);border-radius:var(--radius-full);height:6px;overflow:hidden}[data-theme=dark] .quiz-progress-track{background:var(--color-fill)}.quiz-progress-bar{border-radius:var(--radius-full);background:linear-gradient(90deg,#0071e3,#2997ff);height:100%;transition:width .25s cubic-bezier(.16,1,.3,1)}.badge-answered{border-radius:var(--radius-full);color:light-dark(#15803d,#30d158);letter-spacing:.04em;cursor:default;user-select:none;min-height:22px;box-shadow:none;background:#34c75926;border:1px solid #34c75966;justify-content:center;align-items:center;gap:.35rem;padding:.22rem .65rem .2rem;font-size:.72rem;font-weight:650;line-height:1.1;display:inline-flex}[data-theme=dark] .badge-answered{color:#30d158;background:#30d15826;border-color:#30d15859}.quiz-slide-stage{min-height:240px;margin-bottom:1.5rem;position:relative}.quiz-slide{animation:.2s cubic-bezier(.16,1,.3,1) quizSlideFadeIn;display:none}.quiz-slide.active{display:block}@keyframes quizSlideFadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.slide-meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.85rem;display:flex}.slide-meta-left{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.slide-meta-right{flex-wrap:wrap;align-items:center;gap:.5rem;margin-left:auto;display:inline-flex}.badge{border-radius:var(--radius-full);letter-spacing:.04em;cursor:default;user-select:none;min-height:22px;box-shadow:none;justify-content:center;align-items:center;gap:.35rem;padding:.22rem .65rem .2rem;font-size:.72rem;font-weight:650;line-height:1.1;display:inline-flex}.badge-type{background:var(--color-fill);color:var(--color-text-secondary);border:1px solid var(--color-border)}[data-theme=dark] .badge-type{background:var(--color-fill);border-color:var(--color-border);color:var(--color-text-secondary)}.badge-points{color:light-dark(#b45309,#ff9f0a);background:#ff950026;border:1px solid #ff950066}[data-theme=dark] .badge-points{color:#ff9f0a;background:#ff9f0a26;border-color:#ff9f0a59}.slide-prompt{margin-bottom:1.25rem}.slide-prompt p{color:var(--color-text);white-space:pre-line;letter-spacing:-.012em;text-align:justify;text-justify:inter-word;hyphens:auto;font-size:1.05rem;font-weight:700;line-height:1.55}.quiz-prompt-sub{color:var(--color-brand);opacity:.95;text-align:justify;text-justify:inter-word;hyphens:auto;margin-top:.45rem;padding-left:.15rem;font-size:.95rem;font-weight:500;line-height:1.5;display:block}[data-theme=dark] .quiz-prompt-sub{color:#60a5fa}[data-theme=dark] .slide-prompt p{color:var(--color-text)}.slide-options{flex-direction:column;gap:.65rem;display:flex}.option-card{background:var(--color-surface);border:1px solid var(--color-border);cursor:pointer;user-select:none;border-radius:16px;align-items:center;gap:.85rem;padding:.95rem 1.25rem;transition:all .18s cubic-bezier(.16,1,.3,1);display:flex}.option-card:hover{border-color:var(--color-border-strong);background:var(--color-fill)}.option-card:active{transform:scale(.99)}[data-theme=dark] .option-card:hover{background:var(--color-fill);border-color:var(--color-border-strong)}.option-card.selected{border-color:var(--color-brand);box-shadow:0 0 0 1px var(--color-brand);background:light-dark(#0071e314,#2997ff24)}[data-theme=dark] .option-card.selected{border-color:var(--color-brand);background:#2997ff26}.option-checkbox{display:none}.option-letter{background:var(--color-fill);width:30px;height:30px;color:var(--color-text-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8125rem;font-weight:700;transition:all .18s cubic-bezier(.16,1,.3,1);display:flex}[data-theme=dark] .option-letter{background:var(--color-fill);color:var(--color-text-secondary)}.option-card.selected .option-letter{background:var(--color-brand);color:#fff}.option-text{color:var(--color-text);white-space:pre-line;text-align:justify;text-justify:inter-word;hyphens:auto;flex:1;font-size:.9375rem;font-weight:500;line-height:1.45}.option-text-sub{color:var(--color-text-secondary);text-align:justify;text-justify:inter-word;hyphens:auto;margin-top:.25rem;font-size:.85rem;font-weight:400;line-height:1.4;display:block}[data-theme=dark] .option-text{color:var(--color-text)}.option-check-icon{color:var(--color-brand);opacity:0;font-size:1.1rem;font-weight:800;transition:opacity .15s}.option-card.selected .option-check-icon{opacity:1}.slide-numeric{background:var(--color-fill);border:1px solid var(--color-border);border-radius:var(--radius-lg);margin:1.25rem 0;padding:1.15rem}.slide-numeric-label{color:var(--color-text);margin-bottom:.6rem;font-size:.9rem;font-weight:600;display:block}.slide-numeric-row{align-items:center;gap:.75rem;display:flex}.slide-numeric-input{font-variant-numeric:tabular-nums;color:var(--color-text);background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius);width:160px;max-width:100%;padding:.65rem .9rem;font-size:1.1rem;font-weight:700;transition:border-color .18s}.slide-numeric-input:focus{border-color:var(--color-brand);outline:none;box-shadow:0 0 0 3px #0071e333}.slide-numeric-unit{color:var(--color-text-secondary);font-size:1rem;font-weight:600}.slide-reveal{margin-top:1.25rem}.option-card.is-correct-answer{background-color:#34c7591a;border-color:#34c759}[data-theme=dark] .option-card.is-correct-answer{background-color:#30d15824;border-color:#30d158}.slide-reveal .btn-reveal{margin-inline:auto;display:block}.btn-reveal{background:var(--color-brand);border-color:var(--color-brand);color:#fff;font-weight:var(--btn-font-weight);box-shadow:0 1px 3px #0071e340}.btn-reveal:hover{background:var(--color-brand-hover);border-color:var(--color-brand-hover);box-shadow:0 4px 12px #0071e359}[data-theme=dark] .btn-reveal:hover{background:var(--color-brand-hover);border-color:var(--color-brand-hover)}.answer-reveal{background:var(--color-fill);border:1px solid var(--color-border);border-radius:16px;margin-top:.75rem;padding:.95rem}.answer-reveal[hidden]{display:none}[data-theme=dark] .answer-reveal{background:var(--color-fill);border-color:var(--color-border)}.reveal-answer{color:var(--color-text);font-size:.9rem;font-weight:600;line-height:1.5}.reveal-answer ul{margin:.35rem 0 0;padding-left:1.2rem}.reveal-answer li{margin-bottom:.2rem}.reveal-answer strong{color:#34c759}[data-theme=dark] .reveal-answer{color:var(--color-text)}[data-theme=dark] .reveal-answer strong{color:#30d158}.reveal-explanation{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);white-space:pre-line;text-align:justify;text-justify:inter-word;hyphens:auto;border-radius:14px;margin-top:.65rem;padding:.8rem 1rem;font-size:.825rem;line-height:1.5}[data-theme=dark] .reveal-explanation{background:var(--color-surface);border-color:var(--color-border);color:var(--color-text)}.reveal-explanation strong{color:var(--color-brand);vertical-align:-.1em;align-items:center;gap:.35rem;margin-right:.35rem;font-weight:700;display:inline-flex}[data-theme=dark] .reveal-explanation strong{color:var(--color-brand)}.reveal-rules-grid{flex-direction:column;gap:.5rem;margin-top:.65rem;display:flex}.reveal-rule{-webkit-backdrop-filter:blur(12px);border-radius:14px;flex-direction:column;gap:.4rem;padding:.75rem 1rem;font-size:.8125rem;line-height:1.5;display:flex;position:relative}.reveal-rule p{color:var(--color-text);text-align:justify;text-justify:inter-word;hyphens:auto;margin:0;font-size:.8125rem;font-weight:450;line-height:1.5}.reveal-rule-required{background:light-dark(#34c75914,#30d1581f);border:1px solid light-dark(#34c7593d,#30d1584d);box-shadow:0 1px 4px #34c7590f}.reveal-rule-forbidden{background:light-dark(#ff3b3014,#ff453a1f);border:1px solid light-dark(#ff3b303d,#ff453a4d);box-shadow:0 1px 4px #ff3b300f}.reveal-rule-badge{border-radius:var(--radius-full,9999px);letter-spacing:.045em;text-transform:uppercase;cursor:default;user-select:none;justify-content:center;align-items:center;gap:.35rem;width:fit-content;min-height:22px;padding:.22rem .65rem .2rem;font-size:.7rem;font-weight:700;line-height:1.1;display:inline-flex}.reveal-badge-required{color:light-dark(#15803d,#30d158);background:light-dark(#34c7592e,#30d1583d);border:1px solid light-dark(#34c75959,#30d1586b)}.reveal-badge-forbidden{color:light-dark(#b91c1c,#ff453a);background:light-dark(#ff3b302e,#ff453a3d);border:1px solid light-dark(#ff3b3059,#ff453a6b)}.reveal-rule-icon{flex-shrink:0;display:inline-block}.reveal-answer-sub{color:var(--color-text-secondary);margin-top:.25rem;font-size:.85rem;font-weight:400;line-height:1.45;list-style:none}.reveal-rule-sub{color:var(--color-text-secondary);margin-top:.25rem;font-size:.8125rem;font-weight:400;line-height:1.45}.reveal-explanation-sub{color:var(--color-text-secondary);border-top:1px dashed var(--color-border);margin-top:.45rem;padding-top:.45rem;font-size:.825rem;font-weight:400;line-height:1.5}.quiz-controls{border-top:1px solid #f1f5f9;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;padding-top:1.25rem;display:flex}[data-theme=dark] .quiz-controls{border-color:#1f2937}.quiz-action-right{align-items:center;gap:.5rem;display:flex}.btn{min-height:var(--btn-min-height,40px);padding:var(--btn-pad-y) var(--btn-pad-x);border-radius:var(--btn-radius);font-weight:var(--btn-font-weight);font-size:var(--btn-font-size);cursor:pointer;user-select:none;border:1px solid #0000;justify-content:center;align-items:center;gap:.45rem;line-height:1.2;text-decoration:none;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.38;cursor:not-allowed;box-shadow:none;pointer-events:none;transform:none}.btn-nav,.btn-secondary{background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text);box-shadow:0 1px 2px #0000000a}.btn-nav:hover:not(:disabled),.btn-secondary:hover:not(:disabled){background:var(--color-fill);border-color:var(--color-border-strong)}.btn-next,.btn-primary{background:var(--color-brand);color:var(--color-on-brand);box-shadow:0 1px 3px #0071e340}.btn-next:hover:not(:disabled),.btn-primary:hover:not(:disabled){background:var(--color-brand-hover);box-shadow:0 4px 12px #0071e359}.btn-submit{color:#fff;background:#059669;box-shadow:0 1px 3px #05966940}.btn-submit:hover:not(:disabled){background:#047857;box-shadow:0 4px 12px #05966959}.quiz-counter{color:#64748b;background:#f8fafc;border:1px solid #e2e8f0;border-radius:9999px;padding:.3rem .75rem;font-size:.8125rem;font-weight:700}[data-theme=dark] .quiz-counter{color:#94a3b8;background:#1e293b;border-color:#334155}.quiz-counter .current-num{color:#2563eb;font-weight:800}[data-theme=dark] .quiz-counter .current-num{color:#60a5fa}.quiz-slider-root.is-completed .quiz-header,.quiz-slider-root.is-completed .quiz-slide-stage,.quiz-slider-root.is-completed .quiz-controls,.quiz-slider-root.is-completed .quiz-abort-row{display:none!important}.quiz-slider-root.is-completed .quiz-result-view{margin-top:0;padding-top:0}.result-card{text-align:center;border-radius:12px;margin-bottom:0;padding:1.75rem 1.25rem}.result-card.is-completed{background:#eff6ff;border:1.5px solid #93c5fd}[data-theme=dark] .result-card.is-completed{background:#2563eb1f;border-color:#3b82f659}.result-badge-icon{color:#34c759;justify-content:center;align-items:center;margin-bottom:.75rem;display:inline-flex}.result-badge-icon svg{width:48px;height:48px}.result-headline{color:#0f172a;margin-bottom:.35rem;font-size:1.35rem;font-weight:800}[data-theme=dark] .result-headline{color:#f8fafc}.result-score{color:var(--color-brand);margin-bottom:.65rem;font-size:1.15rem}[data-theme=dark] .result-score{color:var(--color-brand)}.result-note{color:#64748b;max-width:480px;margin:0 auto 1.25rem;font-size:.875rem;line-height:1.5}[data-theme=dark] .result-note{color:#94a3b8}.result-actions{flex-wrap:wrap;justify-content:center;gap:.75rem;display:flex}.btn-primary{color:#fff;background:#2563eb}.btn-primary:hover{background:#1d4ed8}.btn-secondary{color:#334155;background:#fff;border:1px solid #cbd5e1;text-decoration:none}[data-theme=dark] .btn-secondary{color:#cbd5e1;background:#1e293b;border-color:#334155}.btn-secondary:hover{color:#2563eb;border-color:#3b82f6}.slide-sign-image{background:#fff;border:1px solid #e2e8f0;border-radius:8px;max-width:100%;max-height:180px;margin:.25rem auto .9rem;display:block}@media (width<=640px){.quiz-container{border-radius:12px;padding:1rem}.quiz-progress-meta{grid-template-columns:1fr auto;grid-template-areas:"label reset""text text";align-items:center;gap:.45rem .5rem;display:grid}.quiz-progress-label{grid-area:label}.quiz-progress-meta-right{display:contents}.quiz-progress-text{grid-area:text;font-size:.8125rem}.quiz-progress-meta-right .btn-reset-progress{flex-shrink:0;grid-area:reset;margin-left:auto}.quiz-controls{gap:.5rem}.option-card{gap:.6rem;padding:.7rem .75rem}.dot-btn{width:26px;height:26px;font-size:.7rem}.quiz-arrow-btn{width:26px;height:26px}}.ad-slot-wrapper{box-sizing:border-box;border-radius:var(--radius-lg,16px);background:var(--color-surface,#00000005);border:1px dashed var(--color-border-subtle,#00000014);contain:layout;flex-direction:column;justify-content:center;align-items:center;width:100%;max-width:100%;margin:2rem auto;padding:.75rem .5rem;transition:border-color .2s;display:flex;overflow:hidden}[data-theme=dark] .ad-slot-wrapper{background:#ffffff05;border-color:#ffffff14}.ad-slot-header{justify-content:center;width:100%;margin-bottom:.5rem;display:flex}.ad-disclosure-label{letter-spacing:.08em;text-transform:uppercase;color:var(--color-text-tertiary,#94a3b8);opacity:.85;user-select:none;font-size:.625rem;font-weight:600}.ad-slot-content{width:100%;max-width:100%;min-height:inherit;justify-content:center;align-items:center;display:flex}.ad-slot-content ins.adsbygoogle{width:100%;max-width:100%}.ad-in-article{min-height:280px}.ad-horizontal{min-height:100px}.ad-result-card{min-height:280px;margin:1.75rem auto}.ad-sidebar{display:none!important}@media (width>=1520px){.ad-sidebar{width:160px;min-height:600px;display:flex!important}}@media (width<=767px){.ad-slot-wrapper{border-radius:10px;margin:1rem auto;padding:.35rem .25rem}.ad-slot-header{margin-bottom:.2rem}.ad-disclosure-label{letter-spacing:.06em;font-size:.5625rem}.ad-in-article{max-width:100%;min-height:250px}.ad-horizontal{max-width:100%;min-height:52px;margin:.5rem auto;padding:.25rem}.ad-result-card{max-width:100%;min-height:250px}.ad-sidebar{display:none!important}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background-color:var(--color-bg);color:var(--color-text);flex-direction:column;min-height:100vh;line-height:1.6;transition:background-color .25s cubic-bezier(.16,1,.3,1),color .25s cubic-bezier(.16,1,.3,1);display:flex}.skip-link{z-index:9999;background-color:var(--color-brand);border-radius:var(--radius-md,12px);padding:.75rem 1.25rem;font-size:.875rem;font-weight:700;text-decoration:none;transition:top .2s cubic-bezier(.16,1,.3,1);position:absolute;top:-120px;left:1.5rem;box-shadow:0 4px 14px #00000040;color:#fff!important}.skip-link:focus,.skip-link:focus-visible{outline-offset:2px;outline:3px solid #fff;top:1rem}#main-content:focus{outline:none}.site-container{width:100%;max-width:1080px;margin:0 auto;padding-inline:1.5rem}.site-header{z-index:50;-webkit-backdrop-filter:saturate(180%)blur(20px);border-bottom:1px solid var(--color-border);background-color:light-dark(#f5f5f7d1,#000000d1);transition:background-color .25s cubic-bezier(.16,1,.3,1),border-color .25s cubic-bezier(.16,1,.3,1);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:1rem;height:52px;display:flex}.site-brand{letter-spacing:-.02em;color:var(--color-text);align-items:center;gap:.65rem;font-size:1.05rem;font-weight:700;transition:opacity .15s;display:flex}.site-brand:hover{opacity:.85}.brand-badge{color:#fff;background:linear-gradient(135deg,#0071e3,#2997ff);border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:.8125rem;font-weight:800;transition:transform .25s cubic-bezier(.16,1,.3,1),box-shadow .25s;display:inline-flex;box-shadow:0 2px 10px #0071e359}.site-brand:hover .brand-badge{transform:scale(1.05);box-shadow:0 4px 14px #0071e373}.brand-badge svg{width:22px;height:22px;transition:transform .45s cubic-bezier(.16,1,.3,1);display:block}.site-brand:hover .brand-badge svg{transform:rotate(30deg)}.site-nav{flex-wrap:wrap;align-items:center;gap:.35rem;display:flex}.nav-link{border-radius:var(--radius-full);min-height:34px;font-size:var(--font-size-sm);color:var(--color-text-secondary);user-select:none;justify-content:center;align-items:center;gap:.35rem;padding:.35rem .95rem;font-weight:500;line-height:1.2;text-decoration:none;transition:all .18s cubic-bezier(.16,1,.3,1);display:inline-flex}.nav-link:hover{color:var(--color-text);background-color:var(--color-fill)}.nav-link:active{transform:scale(.97)}.nav-link.active{color:var(--color-brand);background-color:light-dark(#0071e31a,#2997ff2e);font-weight:600}.nav-item-dropdown{align-items:center;display:inline-flex;position:relative}.dropdown-arrow{opacity:.7;transition:transform .2s}.nav-item-dropdown:hover .dropdown-arrow{opacity:1;transform:rotate(180deg)}.dropdown-menu{-webkit-backdrop-filter:saturate(180%)blur(20px);border:1px solid var(--color-border);border-radius:var(--radius);min-width:210px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform-origin:0 0;z-index:100;background-color:light-dark(#fffffff2,#1c1c1ef2);flex-direction:column;gap:.15rem;padding:.4rem;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex;position:absolute;top:calc(100% + 6px);left:0;transform:translateY(6px)scale(.98)}.nav-item-dropdown:hover .dropdown-menu,.nav-item-dropdown:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)scale(1)}.dropdown-link{border-radius:var(--radius-sm);color:var(--color-text-secondary);white-space:nowrap;padding:.45rem .75rem;font-size:.85rem;font-weight:500;transition:all .15s cubic-bezier(.16,1,.3,1);display:block}.dropdown-link:hover{background-color:var(--color-fill);color:var(--color-text)}.dropdown-link.active{color:var(--color-brand);background-color:light-dark(#0071e314,#2997ff26);font-weight:600}.header-actions{align-items:center;gap:.6rem;display:flex}.theme-toggle-btn{background:var(--color-fill);border:1px solid var(--color-border);width:36px;height:36px;color:var(--color-text-secondary);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;transition:all .2s cubic-bezier(.16,1,.3,1);display:inline-flex}.theme-toggle-btn:hover{color:var(--color-text);border-color:var(--color-border-strong);background:var(--color-fill-strong);transform:scale(1.05)}.theme-toggle-btn:active{transform:scale(.92)}.theme-toggle-btn svg{width:18px;height:18px}.site-outer-wrapper{justify-content:center;align-items:flex-start;width:100%;min-width:0;display:flex;position:relative}.desktop-side-rail{display:none}@media (width>=1520px){.desktop-side-rail{z-index:10;flex:0 0 160px;width:160px;margin-top:2.5rem;display:block}.desktop-side-rail-left{margin-right:1.25rem}.desktop-side-rail-right{margin-left:1.25rem}.sticky-rail-content{width:160px;position:sticky;top:85px}.sticky-rail-content .ad-slot-wrapper{margin:0}}.site-main{flex:1;min-width:0;padding-block:2.5rem 4rem}@media (width<=640px){.site-brand{font-size:.95rem}.site-container{padding-inline:.85rem}.site-nav{flex-wrap:wrap;justify-content:center;row-gap:.3rem}.site-nav .nav-link{flex:42%;justify-content:center;min-height:44px;padding:.45rem .4rem}.site-header .header-inner{height:auto;min-height:52px;padding-block:.4rem}}.gdpr-banner{z-index:1000;-webkit-backdrop-filter:saturate(180%)blur(20px);width:calc(100% - 3rem);max-width:calc(1080px - 3rem);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);text-align:justify;text-justify:inter-word;hyphens:auto;background:light-dark(#fffffff0,#1c1c1ef0);flex-direction:row;justify-content:space-between;align-items:center;gap:1.5rem;padding:1.15rem 1.75rem;font-size:.8125rem;animation:.35s cubic-bezier(.16,1,.3,1) appleSlideUp;display:flex;position:fixed;inset:auto auto 1.5rem 50%;transform:translate(-50%)}@keyframes appleSlideUp{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}.gdpr-banner .gdpr-text a{color:var(--color-brand);text-decoration:underline}.gdpr-text{text-align:justify;text-justify:inter-word;hyphens:auto;flex:1;max-width:100%;line-height:1.5}.gdpr-actions{flex-shrink:0;align-items:center;gap:.75rem;display:flex}.gdpr-btn{padding:var(--btn-pad-y) var(--btn-pad-x);border-radius:var(--btn-radius);font-weight:var(--btn-font-weight);font-size:var(--btn-font-size);cursor:pointer;white-space:nowrap;border:1px solid #0000;line-height:1.2;transition:all .18s cubic-bezier(.16,1,.3,1)}.gdpr-btn:active{transform:scale(.97)}.gdpr-btn-primary{background:var(--color-brand);color:#fff;box-shadow:0 1px 3px #0071e340}.gdpr-btn-primary:hover{background:var(--color-brand-hover);box-shadow:0 4px 12px #0071e359}.gdpr-btn-secondary{background:var(--color-fill-strong);color:var(--color-text);border:1px solid var(--color-border)}.gdpr-btn-secondary:hover{background:var(--color-fill);border-color:var(--color-border-strong)}@media (width<=900px){.gdpr-banner{text-align:justify;text-justify:inter-word;hyphens:auto;flex-direction:column;align-items:stretch;gap:1rem;padding:1.15rem 1.35rem}.gdpr-actions{justify-content:flex-end}}@media (width<=640px){.gdpr-banner{width:calc(100% - 1.7rem);padding:1rem 1.15rem;font-size:.8rem;bottom:1rem}.gdpr-actions{gap:.5rem;width:100%}.gdpr-actions .gdpr-btn{text-align:center;white-space:normal;flex:1;padding-inline:.5rem}}.site-footer{border-top:1px solid var(--color-border);color:var(--color-text-secondary);background-color:var(--color-bg);margin-top:2rem;padding:1.75rem 0 2.5rem;font-size:.75rem;transition:background-color .25s cubic-bezier(.16,1,.3,1),border-color .25s cubic-bezier(.16,1,.3,1)}.footer-inner{text-align:center;flex-direction:column;align-items:center;gap:.5rem;display:flex}.footer-legal{flex-wrap:wrap;justify-content:center;align-items:center;gap:.35rem 1rem;display:flex}.footer-legal a,.site-footer button#gdpr-revoke-btn{color:var(--color-text-secondary);text-decoration:underline;text-decoration-color:color-mix(in srgb, currentColor 40%, transparent);font:inherit;cursor:pointer;border-radius:var(--radius-sm);background:0 0;border:none;padding:.15rem .3rem;transition:color .15s}.footer-legal a:hover,.footer-legal a:focus-visible,.site-footer button#gdpr-revoke-btn:hover,.site-footer button#gdpr-revoke-btn:focus-visible{color:var(--color-text)}.footer-note{color:var(--color-muted);margin:0;font-size:.7rem}.footer-version{color:var(--color-muted);font-variant-numeric:tabular-nums;margin:0;font-size:.7rem}