:root{--article-text:16px}body{background:#fff}.breadcrumb{flex-wrap:wrap}.reading-progress{position:fixed;top:0;right:0;width:100%;height:3px;z-index:101;pointer-events:none}.reading-progress>span{display:block;width:0;height:100%;background:var(--red)}.article-hero{display:grid;grid-template-columns:1.06fr 1fr;gap:70px;align-items:center;padding-block:42px 60px}.article-labels{display:flex;align-items:center;gap:13px;font-size:10px;color:var(--muted)}.category-pill{color:#b52a3b;background:#fff0f2;border:1px solid #f3dfe2;border-radius:3px;padding:5px 12px}.article-hero h1{font-size:clamp(34px,3.6vw,48px);line-height:1.8;letter-spacing:-1.3px;margin-block:17px 15px}.article-hero h1 em{font-family:Arial,sans-serif;font-style:normal;font-weight:700;color:var(--red)}.article-deck{font-size:14px;line-height:2.3;color:#536972;max-width:520px}.article-byline{display:flex;align-items:center;gap:12px;margin-top:25px}.author-mark{width:40px;height:40px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;background:#f7f9f8}.author-mark svg{width:18px;height:18px;color:#6d8289}.article-byline>div{display:flex;flex-direction:column;gap:5px;font-size:10px}.article-byline>div>span{font-size:9px;color:var(--muted)}.meta-separator{width:1px;height:31px;background:var(--line);margin-inline:9px}.hero-links{display:flex;align-items:center;gap:25px;margin-top:29px}.hero-links .button{font-size:11px;min-height:47px;padding-inline:23px;gap:28px}.quiet-link{display:flex;align-items:center;gap:15px;font-size:11px;color:#4f6670;min-height:44px}.quiet-link:hover{color:var(--red-dark)}.article-preview{border:1px solid #dce5e4;border-radius:7px;overflow:hidden;background:#f7f9f8;min-width:0}.preview-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:15px 20px;border-bottom:1px solid var(--line);font-size:10px}.preview-heading>span:first-child{display:flex;align-items:center;gap:7px}.preview-heading i{width:5px;height:5px;background:var(--red);border-radius:50%}.preview-heading .mono{font-size:8px;letter-spacing:1.2px;color:#69828b}.preview-canvas{position:relative;background:#fff;display:grid;place-items:center;aspect-ratio:1.45;min-height:280px}.preview-canvas img{width:100%;height:auto;max-height:100%;object-fit:contain;mix-blend-mode:multiply}.model-label{position:absolute;top:18px;right:20px;z-index:1;font-size:9px;color:#70838b}.axis-note{position:absolute;bottom:15px;left:18px;font:8px/1.5 monospace;letter-spacing:1px;color:#86989d}.model-switch{display:grid;grid-template-columns:1fr 1fr;padding:7px;gap:6px;border-top:1px solid var(--line)}.model-switch button{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:43px;padding:10px 15px;border:1px solid transparent;border-radius:4px;background:transparent;color:#617780;font-size:10px}.model-switch button span{font:8px/1.5 monospace;letter-spacing:.7px;opacity:.65}.model-switch button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}.model-switch button:hover:not([aria-pressed=true]){background:#eaf0ee;border-color:#d8e2df}.article-reading{border-block:1px solid var(--line);background:linear-gradient(to left,#fff 0%,#fff 66%,#f8f9f8 66%,#f8f9f8 100%)}.reading-layout{display:grid;grid-template-columns:minmax(0,780px) 260px;justify-content:space-between;gap:80px;padding-block:45px 65px;align-items:start}.lesson-content{min-width:0;--article-text:16px}.lesson-content.large-text{--article-text:19px}.reading-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:35px;font-size:10px;color:var(--muted)}.reading-toolbar>span{display:flex;align-items:center;gap:9px}.reading-toolbar>span svg{width:18px;height:18px}.reading-actions{display:flex;gap:12px;align-items:center}.reading-actions button{font:inherit;display:flex;align-items:center;gap:8px;background:none;border:0;padding:7px 5px;min-height:35px;color:#58717c}.reading-actions button b{font:15px/1.4 Georgia,serif;letter-spacing:-1px}.reading-actions button:hover,.reading-actions button[aria-pressed=true]{color:var(--red-dark)}.lesson-section{scroll-margin-top:120px;margin-bottom:52px}.section-kicker{font-size:10px;color:#7b9096;margin-bottom:10px}.lesson-content h2{font-size:26px;line-height:1.85;letter-spacing:-.5px;margin-block:0 19px}.lesson-content p{font-size:var(--article-text);line-height:2.25;color:#3e5763;margin-block:15px}.lesson-content bdi{font-family:Arial,sans-serif;font-size:1em;color:#233f4d}.lesson-figure{margin:26px 0 32px;border:1px solid var(--line);border-radius:5px;background:#fff;overflow:hidden}.lesson-figure .image-zoom{display:block;position:relative;width:100%;padding:16px;border:0;background:#fff;cursor:zoom-in;text-align:center}.lesson-figure img{display:block;max-width:100%;height:auto;width:auto;margin:auto}.zoom-label{position:absolute;bottom:15px;left:15px;display:flex;gap:7px;align-items:center;border:1px solid #dbe4e6;background:#fffffff2;border-radius:4px;padding:7px 10px;font-size:9px;color:#5c737e;opacity:0;transition:opacity .2s}.zoom-label svg{width:13px;height:13px}.image-zoom:hover .zoom-label,.image-zoom:focus-visible .zoom-label{opacity:1}.lesson-figure figcaption{position:static;background:#f7f9f8;border-top:1px solid var(--line);display:flex;justify-content:start;gap:15px;font-size:10px;line-height:1.9;min-height:42px;padding:10px 17px;color:#5f757d}.figure-index{flex-shrink:0;color:#a9444e;font-size:9px;border-left:1px solid #d7e0de;padding-left:14px}.lesson-figure.narrow{max-width:430px;margin-inline:auto}.lesson-figure.narrow .image-zoom{padding:28px}.command-path{background:var(--ink);color:#e6efef;display:flex;align-items:center;gap:20px;justify-content:center;border-radius:4px;padding:21px 18px;margin:22px 0;font:14px/1.5 Consolas,monospace}.command-path b{color:#6d8b97;font-size:20px;font-weight:400}.command-path strong{color:#fff;border:1px solid #70858e;padding:5px 12px;border-radius:3px;font-weight:400}.settings-list{display:grid;gap:0;margin-block:23px}.settings-list>div{display:flex;gap:18px;padding:19px 0;border-bottom:1px solid #e6ebea}.settings-list>div:first-child{border-top:1px solid #e6ebea}.setting-number{width:28px;height:28px;border:1px solid #dfe5e4;border-radius:50%;background:#f9faf9;display:grid;place-items:center;flex-shrink:0;font-size:11px;color:#a74d56}.settings-list h3{font:600 17px/1.65 Arial,sans-serif;text-align:right;margin:0}.settings-list p{margin:7px 0 0;font-size:var(--article-text)}.lesson-note{margin:24px 0;border-right:3px solid var(--red);background:#fbf4f3;padding:17px 22px}.lesson-note>span{font-size:10px;font-weight:600;color:#9e3747}.lesson-note p{font-size:calc(var(--article-text) - 2px);margin:4px 0 0;line-height:2.2}.article-end{text-align:center;border-bottom:1px solid var(--line);padding:10px 0 35px;margin-bottom:30px}.end-mark{display:block;width:25px;height:3px;background:var(--red);margin:auto}.article-end p{font-size:10px;color:#8a9c9f;margin:11px 0 3px}.article-end a{font-size:12px;display:inline-flex;align-items:center;gap:18px;min-height:44px}.article-end svg{width:18px}.author-card{display:flex;align-items:center;gap:20px;padding:25px;background:#f7f9f8;border:1px solid var(--line);border-radius:4px}.author-sign{display:grid;place-items:center;width:58px;height:58px;background:var(--ink);color:#fff;font:19px/1.5 Georgia,serif;flex-shrink:0;border-radius:4px}.author-card>div>span{font-size:9px;color:var(--muted)}.author-card h3{font-size:15px;margin:7px 0}.author-more{font-size:10px;color:#6b828d}.comment-section{padding-top:52px;scroll-margin-top:115px}.comment-section>p{font-size:13px;margin-bottom:25px}.comment-section form{display:grid;gap:12px}.comment-section label{display:block;font-size:11px;margin-bottom:7px}.comment-section label span{color:var(--red)}.comment-section textarea,.comment-section input{width:100%;border:1px solid #cfdadd;border-radius:4px;background:#fff;color:var(--ink);padding:13px 15px;font:14px/2 Iran,Tahoma,sans-serif;resize:vertical}.comment-section textarea::placeholder{color:#8b9b9f;font-size:12px}.comment-fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}.comment-submit{display:flex;align-items:center;gap:20px;margin-top:7px}.comment-submit .button{font-size:11px;min-height:46px;padding-inline:22px}.comment-submit>span{font-size:9px;color:var(--muted)}#comment-status{font-size:12px;background:#edf5ef;padding:15px;border-radius:3px;margin:0;color:#366b49}.article-sidebar{align-self:stretch}.sidebar-sticky{position:sticky;top:116px}.contents-card{background:#fff;border:1px solid #dce5e3;border-radius:5px;padding:23px 21px;scroll-margin-top:115px}.contents-title{display:flex;align-items:center;justify-content:space-between;gap:7px;font-size:12px;padding-bottom:19px;border-bottom:1px solid var(--line)}.contents-title svg{width:17px;color:#8fa2a7}.contents-card ol{list-style:none;padding:13px 0 0;margin:0}.contents-card ol a{display:flex;gap:12px;align-items:center;font-size:11px;color:#697e87;min-height:45px;padding:7px 0;position:relative}.contents-card ol a>span{font-size:9px;color:#95a4a8}.contents-card ol a[aria-current=location]{color:#b42d40}.contents-card ol a[aria-current=location]>span{color:var(--red)}.contents-card ol a:hover{color:var(--red-dark)}.reading-indicator{border-top:1px solid var(--line);margin-top:13px;padding-top:19px}.reading-indicator>div{display:flex;justify-content:space-between;font-size:9px;color:#7d939a}.reading-indicator b{font-size:9px;font-weight:400;color:#b83448}.reading-indicator>span{display:block;height:3px;background:#e8eeec;margin-top:13px}.reading-indicator i{display:block;height:100%;width:0;background:var(--red);transition:width .1s}.sidebar-course{background:var(--ink);color:#fff;margin-top:22px;padding:24px;border-radius:5px;position:relative;overflow:hidden}.course-symbol{display:grid;place-items:center;width:40px;height:40px;border:1px solid #59707a;border-radius:5px;margin-bottom:20px}.course-symbol svg{width:23px;height:23px;color:#c4d4d8}.sidebar-course .eyebrow{font-size:9px;color:#a0b5bc}.sidebar-course h3{font-size:20px;line-height:1.9;letter-spacing:-.5px;margin:10px 0 13px}.sidebar-course p{font-size:11px;line-height:2.2;color:#b8c9cf}.sidebar-course a{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #ffffff24;padding-top:17px;margin-top:20px;font-size:11px;min-height:43px}.sidebar-course a:hover{color:#ffd7dd}.sidebar-course a svg{width:18px}.sidebar-back{display:flex;align-items:center;gap:10px;font-size:10px;color:#728890;margin-top:17px;min-height:44px}.sidebar-back svg{transform:rotate(180deg);width:15px}.related-section{padding-block:60px}.related-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}.related-heading h2{font-size:28px;line-height:1.8;margin:0}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.related-card{border:1px solid var(--line);border-radius:5px;overflow:hidden;background:#fff;min-width:0;transition:border-color .2s,box-shadow .2s}.related-card:hover{border-color:#b5c7c9;box-shadow:0 9px 20px #172d3b08}.related-image{display:grid;place-items:center;background:#f5f7f5;padding:20px;aspect-ratio:1.9;overflow:hidden}.related-image img{width:100%;height:auto;max-height:100%;object-fit:contain;border-radius:2px}.related-body{padding:23px}.related-body>span{font-size:9px;color:#81969c}.related-body h3{font-size:16px;line-height:2;min-height:64px;margin-block:11px 18px}.related-body h3 a:hover{color:var(--red-dark)}.related-link{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#b42b40;border-top:1px solid var(--line);padding-top:16px;min-height:40px}.related-link svg{width:17px}.local-note{font-size:10px;display:flex;justify-content:space-between;gap:20px;padding-block:22px;border-top:1px solid var(--line);color:#798f96}.local-note a{color:#476573}dialog{padding:50px 28px 24px;background:#fff;border:0;border-radius:8px;width:min(1000px,calc(100% - 40px));max-height:calc(100dvh - 50px);box-shadow:0 20px 90px #0006;overflow:auto}dialog::backdrop{background:#0b1e2cd9;backdrop-filter:blur(4px)}dialog img{display:block;max-width:100%;max-height:calc(100dvh - 170px);width:auto;height:auto;object-fit:contain;margin:auto}dialog p{font-size:12px;line-height:2;text-align:center;color:#6a818c;margin-top:18px}.dialog-close{position:absolute;top:10px;left:12px;display:grid;place-items:center;width:36px;height:36px;background:#f1f5f3;border:1px solid #dce5e2;border-radius:50%;color:var(--ink)}.dialog-close svg{width:18px;height:18px}.dialog-close:hover{background:#fce9ed}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:200;max-width:calc(100% - 35px);width:max-content;background:var(--ink);color:#fff;padding:13px 24px;border-radius:5px;font-size:12px;box-shadow:0 7px 30px #0002}.toast[hidden],#comment-status[hidden]{display:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid #b52b42;outline-offset:4px}button{cursor:pointer}
@media(min-width:1441px){.reading-layout{gap:110px;grid-template-columns:minmax(0,780px) 260px}}
@media(max-width:1100px){.article-hero{gap:40px}.reading-layout{grid-template-columns:minmax(0,1fr) 235px;gap:40px}.contents-card{padding-inline:17px}.article-hero h1{font-size:37px}.article-deck{font-size:13px}.lesson-content h2{font-size:23px}.preview-canvas{min-height:240px}.hero-links{gap:20px}.hero-links .button{gap:18px}.sidebar-course{padding:22px}}
@media(max-width:900px){.article-hero{gap:30px;padding-block:30px 42px}.article-hero h1{font-size:32px}.article-labels{font-size:9px;gap:9px}.article-deck{font-size:12px}.preview-heading{padding:13px;font-size:9px}.preview-heading .mono{font-size:6px}.preview-canvas{min-height:215px}.model-label{top:10px;right:13px;font-size:8px}.model-switch button{padding:9px;font-size:9px}.model-switch button span{font-size:6px}.article-byline{gap:9px;margin-top:20px}.author-mark{display:none}.meta-separator{margin-inline:4px}.article-byline>div{font-size:9px}.article-byline>div>span{font-size:8px}.hero-links{gap:13px;flex-wrap:wrap;margin-top:20px}.hero-links .button{font-size:10px;padding-inline:17px;gap:12px}.quiet-link{font-size:10px}.reading-layout{grid-template-columns:minmax(0,1fr) 200px;gap:28px;padding-block:32px 45px}.contents-card{padding:17px 14px}.contents-title{font-size:10px}.contents-card ol a{font-size:9px;gap:8px}.contents-card ol a>span{font-size:8px}.sidebar-course{padding:20px}.sidebar-course h3{font-size:18px}.sidebar-course p{font-size:10px}.sidebar-course .eyebrow{font-size:8px}.sidebar-back{font-size:9px;gap:7px}.lesson-content h2{font-size:21px}.lesson-content{--article-text:15px}.lesson-content.large-text{--article-text:18px}.reading-toolbar{font-size:9px;gap:10px}.reading-actions{gap:7px}.reading-actions button{font-size:8px}.related-grid{gap:18px}.related-body{padding:18px}.related-body h3{font-size:13px;min-height:78px}.related-image{padding:13px}.comment-submit{align-items:start;flex-direction:column;gap:10px}.related-heading h2{font-size:25px}.local-note{font-size:9px}.sidebar-sticky{top:110px}}
@media(max-width:700px){.article-reading{background:#fff}.reading-layout{display:flex;flex-direction:column;gap:30px}.article-sidebar{order:-1;width:100%;align-self:auto}.sidebar-sticky{position:static}.sidebar-course,.sidebar-back{display:none}.contents-card{padding:20px}.contents-title{font-size:12px;padding-bottom:14px}.contents-card ol{display:grid;grid-template-columns:1fr 1fr;gap:0 12px;padding-top:10px}.contents-card ol a{font-size:10px;min-height:42px}.reading-indicator{display:none}.lesson-content{width:100%;--article-text:16px}.lesson-content h2{font-size:23px}.article-hero{grid-template-columns:1fr;gap:30px;padding-block:26px 35px}.article-hero h1{font-size:39px;line-height:1.75}.article-hero h1 br{display:none}.article-deck{font-size:14px;max-width:none}.article-labels{font-size:10px}.article-byline{margin-top:22px;gap:12px}.author-mark{display:grid;width:35px;height:35px}.article-byline>div{font-size:10px}.article-byline>div>span{font-size:9px}.hero-links{gap:25px;margin-top:23px}.hero-links .button{font-size:11px;padding-inline:23px;gap:24px}.preview-canvas{aspect-ratio:1.65;min-height:0}.preview-canvas img{width:94%}.preview-heading{font-size:10px;padding:15px 20px}.preview-heading .mono{font-size:8px}.model-label{font-size:9px;right:20px;top:16px}.model-switch button{font-size:10px;padding:11px 16px}.model-switch button span{font-size:8px}.related-grid{grid-template-columns:1fr}.related-card{display:grid;grid-template-columns:125px minmax(0,1fr)}.related-image{aspect-ratio:auto;padding:12px}.related-body{padding:18px}.related-body h3{font-size:14px;min-height:0;margin-block:8px 10px}.related-link{padding-top:10px;min-height:36px}.related-heading{align-items:start;gap:15px}.related-heading h2{font-size:23px}.related-heading .quiet-link{font-size:9px;gap:6px;white-space:nowrap}.related-heading .quiet-link svg{width:15px}.related-section{padding-block:40px}.lesson-section{margin-bottom:40px}.lesson-figure{margin-block:22px 27px}.lesson-figure .image-zoom{padding:8px}.lesson-figure .zoom-label{opacity:1;font-size:8px;bottom:8px;left:8px;padding:5px 7px}.lesson-figure figcaption{font-size:9px;padding:10px 12px;gap:10px}.figure-index{font-size:8px;padding-left:10px}.reading-toolbar{font-size:10px;margin-bottom:30px}.reading-actions button{font-size:9px}.reading-actions{gap:8px}.lesson-note{padding:16px 19px}.settings-list>div{gap:13px}.command-path{gap:15px;font-size:13px}.author-card{padding:20px;gap:17px}.author-card h3{font-size:14px}.comment-fields{grid-template-columns:1fr;gap:16px}.comment-section{padding-top:40px}.comment-section input,.comment-section textarea{font-size:16px}.comment-submit{gap:12px}.comment-submit .button{min-height:48px}.local-note{flex-direction:column;gap:12px;font-size:9px;line-height:2}.comment-section>p{font-size:12px}.lesson-content.large-text{--article-text:19px}}
html{scroll-padding-top:100px}.lesson-section{scroll-margin-top:20px}.contents-card,.comment-section{scroll-margin-top:15px}
@media(max-width:700px){.article-hero h1{font-size:32px;line-height:1.9}.article-hero h1 br{display:block}}
@media(prefers-reduced-motion:reduce){.reading-indicator i,.zoom-label,.related-card{transition:none}}