@import "https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap";
:root{--ink:#12202a;--muted:#65717b;--line:#dce2e3;--paper:#f7f8f5;--white:#fff;--blue:#126e82;--blue-strong:#0b4f61;--blue-soft:#e7f1f0;--warm:#efb45c;--danger:#9b472e}*{box-sizing:border-box}::selection{background:var(--blue-soft);color:var(--blue-strong)}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font-family:Noto Sans SC,Inter,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{max-width:1180px;margin:0 auto;padding:0 28px}.topbar{border-bottom:1px solid var(--line);z-index:30;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f7f8f5eb;position:sticky;top:0}.nav{justify-content:space-between;align-items:center;gap:32px;height:72px;display:flex}.brandmark{letter-spacing:.01em;align-items:center;gap:12px;font-weight:800;display:flex}.brand-logo{border:1px solid var(--line);object-fit:cover;border-radius:7px;width:38px;height:38px;transition:transform .3s}.brandmark:hover .brand-logo,.brandmark:focus-visible .brand-logo{transform:rotate(-3deg)}.navlinks{color:var(--muted);gap:28px;font-size:14px;display:flex}.navlinks a:hover{color:var(--ink)}.nav-actions{align-items:center;gap:12px;display:flex}.desktop-courses-link,.desktop-search-link{border-radius:999px;min-height:38px}.btn{border:1px solid var(--ink);color:var(--ink);background:0 0;justify-content:center;align-items:center;gap:8px;padding:11px 16px;font-size:14px;font-weight:600;transition:transform .2s,box-shadow .2s,background-color .2s,color .2s,border-color .2s;display:inline-flex}.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px #12202a1a}.btn:active{box-shadow:none;transform:translateY(0)}.btn:focus-visible,.mobile-menu:focus-visible,summary:focus-visible,.brandmark:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)}.btn.primary:hover{background:#0d1820}.btn.accent{background:var(--blue);color:#fff;border-color:var(--blue)}.btn.ghost{border-color:var(--line);color:var(--muted)}.search-page{padding-bottom:72px}.course-search-form{max-width:760px;margin:0 0 28px}.course-search-form label{margin-bottom:8px;font-weight:700;display:block}.course-search-controls{align-items:stretch;gap:10px;display:flex}.course-search-controls input{border:1px solid var(--line);background:var(--white);min-width:0;color:var(--ink);border-radius:4px;flex:1;padding:11px 12px}.course-search-controls input:focus{outline:2px solid var(--blue);outline-offset:2px;border-color:var(--blue)}.search-state{border-top:1px solid var(--line);max-width:760px;padding:20px 0}.search-results{max-width:900px}.search-result-count{color:var(--muted);margin:0 0 12px;font-size:14px}.search-results ol{gap:12px;margin:0;padding:0;list-style:none;display:grid}.search-result{border:1px solid var(--line);background:var(--white)}.search-result a{padding:18px;display:block}.search-result a:hover{background:var(--blue-soft)}.search-result a:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.search-result-meta,.search-result-section{color:var(--blue-strong);font-family:DM Mono,monospace;font-size:12px}.search-result h2{margin:7px 0;font-size:20px}.search-result p{overflow-wrap:anywhere;margin:8px 0}.search-result-section{margin-top:0}.search-result-link{color:var(--blue-strong);align-items:center;gap:6px;font-size:14px;font-weight:700;display:inline-flex}mark{color:inherit;background:#f6dfa9;padding:0 1px}.hero{border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 70% 40%, #126e820a 0%, transparent 60%), var(--paper);padding:92px 0 84px}.eyebrow{text-transform:uppercase;letter-spacing:.08em;color:var(--blue);font:500 12px DM Mono,monospace}.hero-grid{grid-template-columns:1.1fr .9fr;align-items:end;gap:64px;display:grid}.hero-content{min-width:0}h1{letter-spacing:-.035em;max-width:760px;margin:18px 0 24px;font-size:clamp(42px,6vw,78px);line-height:1.02}.hero-copy{color:var(--muted);max-width:620px;font-size:20px;line-height:1.7}.terminal-preview{color:#d7e6e6;background:#16242b;border-radius:8px;height:60px;margin-top:24px;padding:22px 16px 10px;font:13px/1.7 DM Mono,monospace;overflow:hidden}.terminal-bar{gap:6px;margin:-14px 0 8px;display:flex}.terminal-bar span{border-radius:50%;width:8px;height:8px}.terminal-bar span:first-child{background:#ff5f56}.terminal-bar span:nth-child(2){background:#ffbd2e}.terminal-bar span:nth-child(3){background:#27c93f}.terminal-preview code{white-space:nowrap;width:max-content;max-width:100%;animation:3.2s steps(38,end) both terminalType;display:block;overflow:hidden}@keyframes terminalType{0%{width:0}to{width:100%}}.route-preview{border:1px solid var(--line);background:var(--white);border-radius:10px;padding:24px;box-shadow:0 10px 30px #12202a14}.route-label{color:var(--muted);margin-bottom:16px;font-size:13px}.route-row{border-top:1px solid var(--line);grid-template-columns:38px 1fr auto;align-items:center;gap:14px;padding:15px 0;display:grid}.route-preview .route-row{padding:15px 12px 15px 16px;transition:background-color .2s;position:relative}.route-preview .route-row:before{content:"";background:var(--blue);width:3px;position:absolute;top:12px;bottom:12px;left:0}.route-preview .route-row[data-stage="01"]:before{background:#126e82}.route-preview .route-row[data-stage="02"]:before{background:#0b4f61}.route-preview .route-row[data-stage="03"]:before{background:#efb45c}.route-preview .route-row[data-stage="04"]:before{background:#9b472e}.route-preview .route-row:hover{background:var(--blue-soft)}.route-preview .route-row.route-total{border-top-color:var(--ink);margin-top:4px}.route-preview .route-row.route-total:before{background:var(--ink)}.route-num{color:var(--blue);font:500 13px DM Mono,monospace}.route-row strong{font-size:15px}.route-row span{color:var(--muted);font-size:13px}.section{border-bottom:1px solid var(--line);padding:72px 0}.route-section,.bundle-section{padding:96px 0}.notice-section{padding:56px 0}.faq-section{padding:64px 0}.section-head{justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:48px;display:flex}h2{letter-spacing:-.03em;margin:10px 0 0;font-size:clamp(30px,4vw,48px);font-weight:700;line-height:1.12}.section-intro{max-width:440px;color:var(--muted);font-size:17px;line-height:1.7}.problem-grid{background:var(--line);border:1px solid var(--line);grid-template-columns:repeat(3,1fr);gap:1px;display:grid}.problem{background:var(--paper);min-height:176px;padding:26px}.problem small{color:var(--blue);font:500 12px DM Mono,monospace}.problem h3{margin:28px 0 10px;font-size:20px}.problem p{color:var(--muted);margin:0;font-size:14px;line-height:1.65}.stages{grid-template-columns:repeat(2,1fr);gap:18px;display:grid}.stage-reveal{display:flex}.stage-reveal>.stage-card{flex:1}.stage-card{border:1px solid var(--line);background:var(--white);flex-direction:column;min-height:290px;padding:26px;transition:transform .25s,box-shadow .25s;display:flex;position:relative;overflow:hidden}.stage-card:before{content:"";background:var(--blue);transform-origin:top;width:3px;transition:transform .25s;position:absolute;top:0;bottom:0;left:0;transform:scaleY(0)}.stage-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #12202a14}.stage-card:hover:before{transform:scaleY(1)}.stage-top{color:var(--blue);justify-content:space-between;font:500 13px DM Mono,monospace;display:flex}.stage-id{align-items:center;gap:8px;display:flex}.stage-id:before{content:"";background:var(--blue);border-radius:50%;width:8px;height:8px}.stage-card[data-stage="01"] .stage-id:before,.stage-card[data-stage="01"]:before{background:#126e82}.stage-card[data-stage="02"] .stage-id:before,.stage-card[data-stage="02"]:before{background:#0b4f61}.stage-card[data-stage="03"] .stage-id:before,.stage-card[data-stage="03"]:before{background:#efb45c}.stage-card[data-stage="04"] .stage-id:before,.stage-card[data-stage="04"]:before{background:#9b472e}.stage-card h3{margin:28px 0 12px;font-size:24px}.stage-card p{color:var(--muted);margin:0 0 20px;line-height:1.65}.stage-card .stage-outcome{border-top:1px solid var(--line);margin:-2px 0 20px;padding-top:14px;font-size:13px}.stage-outcome strong{color:var(--ink)}.stage-meta{border-top:1px solid var(--line);justify-content:space-between;align-items:flex-end;margin-top:auto;padding-top:18px;display:flex}.price{letter-spacing:-.03em;font-size:28px;font-weight:800}.price small{color:var(--muted);font-size:13px;font-weight:500}.bundle-section{background:linear-gradient(180deg, var(--paper) 0%, var(--paper) 30%, #e8edec 100%)}.bundle{background:var(--ink);border-radius:12px;grid-template-columns:1.25fr .75fr;gap:1px;display:grid;overflow:hidden;box-shadow:0 12px 40px #12202a1f}.bundle-main,.bundle-side{background:var(--ink);color:#fff;padding:34px}.bundle-side{background:#173a45;flex-direction:column;justify-content:space-between;display:flex}.bundle h3{margin:16px 0;font-size:34px}.bundle p{color:#c6d5d7;line-height:1.7}.benefits{grid-template-columns:repeat(2,1fr);gap:14px 28px;margin-top:28px;display:grid}.benefit{color:#deebeb;gap:10px;font-size:14px;display:flex}.benefit:before{content:"+";color:#7dd3c8;font-family:DM Mono,monospace}.bundle-price{letter-spacing:-.04em;text-shadow:0 2px 12px #00000026;font-size:52px;font-weight:800}.bundle-price small{color:#a9c0c4;font-size:14px;font-weight:500}.bundle-button{color:var(--ink);background:#fff;border-color:#fff}.audience{grid-template-columns:1fr 1fr;gap:18px;display:grid}.audience-block{border-top:2px solid var(--ink);padding-top:18px}.audience-block h3{margin:0 0 12px;font-size:18px}.audience-block ul{margin:0;padding:0;list-style:none}.audience-block li{border-bottom:1px solid var(--line);color:var(--muted);padding:11px 0;font-size:14px}.notice{background:#fff8e9;border:1px solid #ecd39c;grid-template-columns:1fr 1fr;gap:34px;padding:30px;display:grid}.notice h3{margin:0 0 12px;font-size:22px}.notice p{color:#705d3b;font-size:14px;line-height:1.7}.checklist{border:0;min-width:0;margin:0;padding:0}.checklist-item{color:#705d3b;cursor:pointer;border-bottom:1px solid #ecd39c;align-items:flex-start;gap:10px;padding:13px 0;font-size:14px;line-height:1.55;display:flex}.checklist-item input{width:18px;height:18px;accent-color:var(--blue);cursor:pointer;flex:none;margin:2px 0 0}.checklist-item input:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.checklist-item:has(input:checked) span{color:#185b62;font-weight:600}.checklist-status{color:#705d3b;margin:14px 0 0;font-size:13px;font-weight:600}.audience-note{color:var(--muted);margin:22px 0 0;font-size:14px;line-height:1.65}.home-guide{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:28px;max-width:1180px;margin:0 auto;padding:34px 28px;display:flex}.home-guide h2{margin:8px 0 10px;font-size:28px}.home-guide p{color:var(--muted);margin:0;font-size:15px;line-height:1.65}.text-link{color:var(--blue-strong);text-underline-offset:4px;flex:none;align-items:center;gap:6px;font-size:14px;font-weight:700;text-decoration:underline;display:inline-flex}.text-link:focus-visible{outline:2px solid var(--blue);outline-offset:4px}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.faq{max-width:840px}details{border-top:1px solid var(--line);padding:20px 0}summary{cursor:pointer;justify-content:space-between;font-weight:600;list-style:none;transition:color .2s;display:flex}summary::-webkit-details-marker{display:none}summary:hover{color:var(--blue)}summary:after{content:"+";color:var(--blue);font:500 18px DM Mono,monospace;transition:transform .2s}details[open] summary:after{content:"−";transform:rotate(180deg)}details p{color:var(--muted);margin:0;padding:12px 30px 0 0;font-size:14px;line-height:1.7}@keyframes faqFadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}details[open] p{animation:.3s faqFadeIn}.cta{justify-content:space-between;align-items:center;gap:24px;padding:80px 0;display:flex}.cta h2{max-width:620px}.home-cta{background:linear-gradient(135deg, var(--blue-soft) 0%, var(--paper) 60%);border-radius:12px;justify-content:space-between;align-items:center;gap:32px;margin:16px auto 32px;padding:64px 28px;display:flex}.home-cta h2{max-width:620px;margin:0}.reveal{opacity:1;transition:opacity .6s,transform .6s;transition-delay:var(--reveal-delay,0s);transform:translateY(0)}.reveal.reveal-in{opacity:1;transform:translateY(0)}.footer{border-top:2px solid var(--blue);color:var(--muted);justify-content:space-between;gap:16px;padding:28px 0 42px;font-size:13px;display:flex}.page{min-height:100vh}.subpage{padding:70px 0 90px}.guide-page{background:var(--paper)}.guide-article{max-width:820px;margin:0 auto}.guide-header{border-bottom:1px solid var(--line);padding:18px 0 42px}.guide-header h1{max-width:820px;margin:16px 0 20px;font-size:clamp(40px,5vw,64px)}.guide-lead{max-width:720px;color:var(--muted);margin:0;font-size:19px;line-height:1.8}.guide-section{border-bottom:1px solid var(--line);padding:42px 0}.guide-section h2{margin:0 0 20px;font-size:clamp(28px,3.5vw,40px)}.guide-section h3{margin:28px 0 8px;font-size:21px}.guide-section p,.guide-section li{color:#34434b;font-size:16px;line-height:1.85}.guide-section p{margin:0 0 16px}.guide-section p:last-child{margin-bottom:0}.guide-section ul,.guide-section ol{margin:16px 0 0;padding-left:26px}.guide-section li+li{margin-top:10px}.guide-steps{counter-reset:guide-step;list-style:none;padding-left:0!important}.guide-steps li{counter-increment:guide-step;border-top:1px solid var(--line);padding:18px 0 18px 52px;position:relative}.guide-steps li:before{content:counter(guide-step, decimal-leading-zero);color:var(--blue);font:500 13px DM Mono,monospace;position:absolute;top:20px;left:0}.guide-steps h3{margin:0 0 7px}.guide-principles,.guide-safety{border-left:3px solid var(--blue);padding-left:22px}.guide-quote{border-left:3px solid var(--warm);background:var(--blue-soft);padding:18px 20px;font-weight:600;color:var(--blue-strong)!important;margin:22px 0!important}.guide-cta{border:1px solid var(--line);background:var(--white);justify-content:space-between;align-items:center;gap:28px;margin-top:42px;padding:28px;display:flex}.guide-cta h2{max-width:600px;margin:8px 0 10px;font-size:28px}.guide-cta p{max-width:600px;color:var(--muted);margin:0;line-height:1.7}.subpage-head{max-width:760px;margin-bottom:44px}.subpage-head h1{margin-bottom:18px;font-size:clamp(38px,5vw,64px)}.muted{color:var(--muted)}.auth-wrap{max-width:460px;margin:0 auto;padding:90px 0}.auth-panel{border:1px solid var(--line);background:var(--white);padding:34px}.auth-panel h1{margin-top:12px;font-size:38px}.auth-back{align-items:center;gap:6px;font-size:13px;display:inline-flex}.auth-eyebrow{margin-top:32px}.auth-intro{line-height:1.7}.auth-tabs{background:var(--paper);border:1px solid var(--line);grid-template-columns:1fr 1fr;gap:4px;margin:26px 0 22px;padding:4px;display:grid}.auth-tab{color:var(--muted);background:0 0;border:0;padding:9px 12px;font-size:14px;font-weight:600}.auth-tab.active{background:var(--white);color:var(--ink);box-shadow:0 1px 5px #12202a14}.input-with-icon{position:relative}.input-with-icon>svg{color:var(--muted);pointer-events:none;position:absolute;top:50%;left:13px;transform:translateY(-50%)}.input-with-icon input{width:100%;padding-left:40px}.auth-submit{width:100%;margin-top:20px}.auth-note{color:var(--muted);margin:20px 0 0;font-size:13px;line-height:1.7}fieldset{border:0;min-width:0;margin:0;padding:0}.field{gap:8px;margin:18px 0;display:grid}.field label{font-size:13px;font-weight:600}.field input{border:1px solid var(--line);background:var(--paper);outline:none;padding:13px 14px}.input-with-icon input{padding-left:42px}.input-control{border:1px solid var(--line);background:var(--paper);outline:none;width:100%;padding:13px 14px}.input-control:focus,.field input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #126e821f}.input-with-toggle{border:1px solid var(--line);background:var(--paper);align-items:center;min-height:47px;display:flex}.input-with-toggle:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px #126e821f}.input-with-toggle>svg{flex:none;margin-left:13px;position:static;transform:none}.input-with-toggle input{width:auto;min-width:0;box-shadow:none;background:0 0;border:0;flex:1;padding:13px 16px 13px 12px}.input-with-toggle input:focus{box-shadow:none;border-color:#0000}.field input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #126e821f}.input-toggle{width:40px;height:32px;color:var(--muted);background:0 0;border:0;flex:0 0 40px;place-items:center;margin-right:5px;padding:0;display:grid}.input-toggle:hover{color:var(--ink)}.input-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.error{color:var(--danger);background:#fff1ec;padding:11px 13px;font-size:13px}.dashboard-grid{grid-template-columns:repeat(2,1fr);gap:18px;display:grid}.dash-card{border:1px solid var(--line);background:var(--white);padding:24px}.dash-card h3{margin:0 0 8px;font-size:19px}.dash-card p{color:var(--muted);font-size:14px;line-height:1.6}.reading-layout{grid-template-columns:210px minmax(0,720px) minmax(120px,1fr);align-items:start;gap:36px;display:grid}.reader-theme{min-width:0}.toc{border-right:1px solid var(--line);padding-right:22px;position:sticky;top:98px}.toc-title{color:var(--muted);margin-bottom:16px;font:500 12px DM Mono,monospace}.toc a{color:var(--muted);padding:9px 0;font-size:13px;line-height:1.4;display:block}.toc a.active{color:var(--blue);font-weight:700}.article{--reader-body-font-size:16px;--reader-table-font-size:14px;min-width:0}.article[data-reader-font-size=small]{--reader-body-font-size:15px;--reader-table-font-size:13px}.article[data-reader-font-size=large]{--reader-body-font-size:17px;--reader-table-font-size:15px}.reader-preference-controls{flex-wrap:wrap;align-items:flex-start;gap:12px 18px;margin:0 0 22px;display:flex}.reader-font-size-control,.reader-theme-control{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;display:flex}.reader-font-size-control>span,.reader-theme-control>span{margin-right:4px;font-weight:600}.reader-font-size-control button,.reader-theme-control button{border:1px solid var(--line);background:var(--paper);min-width:36px;min-height:30px;color:var(--ink);font:inherit;cursor:pointer;border-radius:4px;padding:4px 8px}.reader-font-size-control button:hover,.reader-theme-control button:hover{border-color:var(--blue)}.reader-font-size-control button.active,.reader-theme-control button.active{border-color:var(--blue);background:var(--blue-soft);color:var(--blue-strong);font-weight:700}.reader-font-size-control button:focus-visible,.reader-theme-control button:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.article h1{margin:0 0 18px;font-size:48px}.article h2{margin:48px 0 16px;font-size:30px}.article h3{margin:32px 0 12px;font-size:20px}.article h4{margin:26px 0 10px;font-size:17px}.article-summary{color:#34434b;margin:0 0 10px;font-size:18px;line-height:1.7}.article-meta{margin:0 0 34px;font-size:13px;line-height:1.6}.article-body{overflow-wrap:anywhere;min-width:0}.article-body h1{margin:44px 0 16px;font-size:36px;line-height:1.2}.article-body h2{letter-spacing:0;font-size:28px;line-height:1.25}.article-body h3{font-size:21px;line-height:1.35}.article-body h4{font-size:17px;line-height:1.45}.article p,.article li{color:#34434b;font-size:var(--reader-body-font-size);line-height:1.9}.article ul,.article ol{padding-left:24px}.article li+li{margin-top:6px}.article li>ul,.article li>ol{margin:6px 0}.article-body a{color:var(--blue-strong);text-underline-offset:3px;text-decoration:underline;text-decoration-thickness:1px}.article-body a:hover{color:var(--blue)}.article-body strong{color:var(--ink)}.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}.article blockquote{border-left:3px solid var(--blue);background:var(--blue-soft);color:var(--blue-strong);margin:26px 0;padding:12px 20px}.article blockquote p{color:inherit;margin:0}.course-inline-code{color:#173a45;overflow-wrap:anywhere;background:#e9eeed;padding:2px 6px;font:13px/1.6 DM Mono,monospace}.course-code-block{color:#d7e6e6;background:#16242b;border:1px solid #29404a;max-width:100%;margin:24px 0;padding:42px 18px 18px;position:relative;overflow-x:auto}.course-code-block code{min-width:max-content;color:inherit;white-space:pre;overflow-wrap:normal;background:0 0;padding:0;font:13px/1.75 DM Mono,monospace;display:block}.course-code-language{color:#8fb1b5;text-transform:uppercase;font:500 11px DM Mono,monospace;position:absolute;top:12px;left:18px}.course-table-scroll{border:1px solid var(--line);width:100%;margin:26px 0;overflow-x:auto}.course-table-scroll:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.course-table-scroll table{border-collapse:collapse;background:var(--white);width:100%;min-width:560px;font-size:14px}.course-table-scroll th,.course-table-scroll td{border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:12px 14px}.course-table-scroll th:last-child,.course-table-scroll td:last-child{border-right:0}.course-table-scroll tr:last-child td{border-bottom:0}.course-table-scroll th{color:var(--ink);background:#eef2f1;font-weight:700}.course-table-scroll td{font-size:var(--reader-table-font-size)}.article-body .contains-task-list{padding-left:0;list-style:none}.article-body .task-list-item{list-style:none}.lesson-task-label{cursor:pointer;align-items:flex-start;gap:9px;display:flex}.article-body .task-list-item input{width:16px;height:16px;accent-color:var(--blue);cursor:pointer;flex:none;margin:4px 0 0}.article-body .task-list-item input:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.article-body .task-list-item:has(input:checked){color:var(--blue-strong)}.course-image{border:1px solid var(--line);width:auto;max-width:100%;height:auto;margin:28px auto;display:block}.course-asset-link{background:#eef7f5;border:1px solid #b7d8d3;align-items:center;min-height:34px;padding:5px 9px;font-weight:600;display:inline-flex}.callout{color:#705d3b;background:#fff8e9;border:1px solid #ecd39c;margin:26px 0;padding:16px 18px;font-size:14px;line-height:1.7}.code{color:#d7e6e6;background:#16242b;margin:22px 0;padding:18px;font:13px/1.7 DM Mono,monospace;overflow:auto}.prompt{color:#185b62;white-space:pre-wrap;background:#eef7f5;border:1px solid #b7d8d3;padding:18px;font:13px/1.7 DM Mono,monospace}.article-table{border-collapse:collapse;width:100%;margin:24px 0;font-size:14px}.article-table th,.article-table td{border:1px solid var(--line);text-align:left;padding:12px}.article-table th{background:#eef2f1}.article-nav{border-top:1px solid var(--line);justify-content:space-between;gap:14px;margin-top:60px;padding-top:22px;display:flex}.admin-toolbar{gap:14px;margin-bottom:22px;display:grid}.admin-search,.admin-create{align-items:center;gap:10px;display:flex}.admin-search .input-with-icon{flex:1}.admin-search .input-control,.admin-create .input-control{flex:1;margin:0}.admin-message{margin-top:2px}.admin-table-wrap{overflow-x:auto}.admin-table{border-collapse:collapse;background:var(--white);border:1px solid var(--line);width:100%;min-width:980px}.admin-table th,.admin-table td{text-align:left;border-bottom:1px solid var(--line);padding:14px;font-size:14px}.admin-table th{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:12px}.admin-actions{flex-wrap:wrap;gap:8px;min-width:430px;display:flex}.admin-empty{color:var(--muted);text-align:center!important;padding:30px!important}.tag-muted{color:var(--muted);background:var(--paper)}.spin{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:640px){.admin-search,.admin-create{flex-direction:column;align-items:stretch}.admin-search .input-with-icon,.admin-create .input-control,.admin-search button,.admin-create button{width:100%}}.tag{background:var(--blue-soft);color:var(--blue-strong);padding:4px 7px;font:500 11px DM Mono,monospace;display:inline-block}.mobile-menu,.mobile-navigation{display:none}.user-menu{position:relative}.user-menu-trigger{border:1px solid var(--line);background:var(--paper);height:38px;color:var(--ink);cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:4px 12px 4px 4px;font-size:14px;transition:border-color .2s,box-shadow .2s;display:inline-flex}.user-menu-trigger:hover{border-color:var(--blue);box-shadow:0 0 0 3px #126e8214}.user-menu-trigger:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.user-avatar-thumb{object-fit:cover;background:var(--blue-soft);border-radius:50%;width:28px;height:28px}.user-avatar-thumb.fallback{background:var(--ink);color:var(--paper);place-items:center;font-size:12px;font-weight:600;display:grid}.user-name{text-overflow:ellipsis;white-space:nowrap;max-width:80px;overflow:hidden}.user-menu-trigger svg{color:var(--muted);transition:transform .2s}.user-menu-trigger svg.rotated{transform:rotate(180deg)}.user-menu-panel{z-index:40;border:1px solid var(--line);background:var(--white);min-width:150px;padding:6px;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 10px 25px #12202a1f}.user-menu-panel a,.user-menu-panel button{width:100%;color:var(--ink);text-align:left;background:0 0;border:0;padding:10px 12px;font-size:13px;display:block}.user-menu-panel a:hover,.user-menu-panel button:hover{background:var(--blue-soft)}.mobile-navigation form{border-bottom:1px solid var(--line)}.mobile-navigation form button{width:100%;color:var(--muted);text-align:left;background:0 0;border:0;padding:12px 0;font-size:14px}.stage-locked{opacity:.68;background:#f0f2f1}.stage-unlocked:before{transform:scaleY(1)}.toc-mobile{display:none}.breadcrumbs{color:var(--muted);gap:8px;margin-bottom:18px;font-size:13px;display:flex}.breadcrumbs a{color:var(--blue-strong)}.article-nav-next{flex-direction:column;align-items:flex-end;gap:10px;display:flex}.article-nav-back{color:var(--blue-strong);text-underline-offset:3px;font-size:13px;text-decoration:underline}.account-page{max-width:880px;margin:0 auto;padding-top:40px;padding-bottom:72px}.account-page .subpage-head{margin-bottom:24px}.account-section{border:1px solid var(--line);background:var(--white);border-radius:12px;padding:24px}.account-section+.account-section{margin-top:24px}.profile-card{grid-template-columns:80px minmax(0,1fr) auto;align-items:center;gap:18px;display:grid}.profile-avatar{border:1px solid var(--line);object-fit:cover;background:var(--blue-soft);border-radius:50%;width:80px;height:80px}.profile-info{min-width:0}.profile-name{margin:0 0 6px;font-size:24px}.profile-bio,.profile-phone{color:var(--muted);margin:0;font-size:14px;line-height:1.6}.profile-phone{margin-top:4px;font-family:DM Mono,monospace;font-size:12px}.profile-editor{display:contents}.profile-editor>.btn{grid-area:1/3}.profile-edit-form{border-top:1px solid var(--line);grid-column:1/-1;margin-top:4px;padding-top:22px}.profile-edit-form textarea{resize:vertical;border:1px solid var(--line);background:var(--paper);width:100%;min-height:84px;font:inherit;padding:13px 14px}.profile-edit-form textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px #126e821f}.field-label{font-size:13px;font-weight:600}.avatar-presets{grid-template-columns:repeat(6,48px);gap:10px;display:grid}.avatar-preset{border:1px solid var(--line);background:var(--paper);border-radius:50%;width:48px;height:48px;padding:0;overflow:hidden}.avatar-preset img{object-fit:cover;width:100%;height:100%;display:block}.avatar-preset.selected{border:2px solid var(--blue)}.avatar-preset:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.profile-upload{align-items:center;gap:10px;margin:16px 0;display:flex}.profile-upload input{clip:rect(0 0 0 0);width:1px;height:1px;position:absolute;overflow:hidden}.profile-form-actions{gap:10px;margin-top:18px;display:flex}.profile-message{color:var(--blue-strong);grid-column:1/-1;margin:0;font-size:13px}.account-section-head{margin-bottom:20px}.account-section h2{margin:8px 0 0;font-size:30px}.progress-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.progress-card{border:1px solid var(--line);background:var(--paper);border-radius:8px;gap:10px;padding:18px;transition:transform .2s,border-color .2s;display:grid}.progress-card:hover{border-color:var(--blue);transform:translateY(-2px)}.progress-card.locked{opacity:.6}.progress-label{justify-content:space-between;gap:12px;font-size:14px;display:flex}.progress-label span{color:var(--muted);font-family:DM Mono,monospace}.progress-label strong{color:var(--ink)}.progress-bar{background:var(--line);border-radius:999px;height:6px;overflow:hidden}.progress-fill{border-radius:inherit;background:var(--blue);height:100%;transition:width .25s;display:block}.progress-card small{color:var(--blue-strong);font-size:12px}.recent-learning,.account-security{justify-content:space-between;align-items:end;gap:24px;display:flex}.recent-learning p{color:var(--muted);margin:10px 0 0;line-height:1.6}.account-actions{flex-wrap:wrap;gap:10px;display:flex}.account-actions .error{margin:8px 0 0}.lesson-completion{justify-items:end;gap:8px;display:grid}.lesson-completion .error{margin:0}.stage-completion-feedback{background:#edf6f2;border:1px solid #b8d6ce;justify-content:space-between;align-items:center;gap:24px;margin-top:32px;padding:22px;display:flex}.stage-completion-feedback h2{margin:4px 0 8px;font-size:24px}.stage-completion-feedback p{margin:0}.stage-completion-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.course-study-note{border-left:3px solid var(--blue);background:var(--blue-soft);margin-top:22px;padding:18px 20px}.course-study-note p{color:#34434b;margin:0;font-size:14px;line-height:1.7}.course-study-note p+p{margin-top:10px}.course-learning-cta{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;margin-top:30px;padding:22px 0 0;display:flex}.course-learning-cta p{margin:8px 0 0;line-height:1.6}.course-learning-cta .btn{flex:none}.reader-theme[data-reader-theme=dark]{--paper:#102127;--white:#142c33;--ink:#eef7f5;--muted:#adbfbe;--line:#38545a;--blue:#74c8cb;--blue-strong:#9ce6e0;--blue-soft:#173941;--danger:#ffb4a8;color:var(--ink);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;background:#102127;border:1px solid #29464c;padding:24px}.reader-theme[data-reader-theme=dark] .article-summary,.reader-theme[data-reader-theme=dark] .article p,.reader-theme[data-reader-theme=dark] .article li,.reader-theme[data-reader-theme=dark] .course-study-note p{color:#d5e3e1}.reader-theme[data-reader-theme=dark] .toc{border-color:var(--line)}.reader-theme[data-reader-theme=dark] .toc a,.reader-theme[data-reader-theme=dark] .toc-mobile-list a{color:var(--muted)}.reader-theme[data-reader-theme=dark] .toc a.active,.reader-theme[data-reader-theme=dark] .toc-mobile-list a.active,.reader-theme[data-reader-theme=dark] .article-body a,.reader-theme[data-reader-theme=dark] .breadcrumbs a,.reader-theme[data-reader-theme=dark] .article-nav-back{color:#9ce6e0}.reader-theme[data-reader-theme=dark] .article-body a:hover{color:#c9fffa}.reader-theme[data-reader-theme=dark] .article-body strong{color:#f5fffd}.reader-theme[data-reader-theme=dark] .article blockquote{color:#d8f6f2;background:#173941;border-color:#74c8cb}.reader-theme[data-reader-theme=dark] .course-inline-code{color:#c9f2ec;background:#1d3840}.reader-theme[data-reader-theme=dark] .course-code-block,.reader-theme[data-reader-theme=dark] .code{color:#dcebea;background:#0a181d;border-color:#294952}.reader-theme[data-reader-theme=dark] .course-code-language{color:#9abfc0}.reader-theme[data-reader-theme=dark] .course-table-scroll{border-color:#3b5c62}.reader-theme[data-reader-theme=dark] .course-table-scroll table{background:#142c33}.reader-theme[data-reader-theme=dark] .course-table-scroll th{color:#eef7f5;background:#1d3940}.reader-theme[data-reader-theme=dark] .course-table-scroll tr:nth-child(2n) td{background:#12262d}.reader-theme[data-reader-theme=dark] .course-table-scroll th,.reader-theme[data-reader-theme=dark] .course-table-scroll td,.reader-theme[data-reader-theme=dark] .article-table th,.reader-theme[data-reader-theme=dark] .article-table td{border-color:#38545a}.reader-theme[data-reader-theme=dark] .article-table th{background:#1d3940}.reader-theme[data-reader-theme=dark] .article-body .task-list-item:has(input:checked){color:#9ce6e0}.reader-theme[data-reader-theme=dark] .course-image{background:#e8f0ef;border-color:#54757a;padding:6px}.reader-theme[data-reader-theme=dark] .course-asset-link,.reader-theme[data-reader-theme=dark] .prompt{color:#c9f5ef;background:#173941;border-color:#3c7778}.reader-theme[data-reader-theme=dark] .callout{color:#f0dba6;background:#302a1d;border-color:#8d7140}.reader-theme[data-reader-theme=dark] .error{color:#ffc4ba;background:#3a2425}.reader-theme[data-reader-theme=dark] .stage-completion-feedback{background:#173941;border-color:#3c7778}.reader-theme[data-reader-theme=dark] .btn{color:#eaf7f5;border-color:#5e8588}.reader-theme[data-reader-theme=dark] .btn.primary{color:#092126;background:#74c8cb;border-color:#74c8cb}.reader-theme[data-reader-theme=dark] .btn.primary:hover{background:#9ce6e0;border-color:#9ce6e0}.reader-theme[data-reader-theme=dark] .btn.ghost{color:#d5e3e1;border-color:#5e8588}@media print{.reader-theme[data-reader-theme=dark]{--paper:#fff;--white:#fff;--ink:#17272b;--muted:#4a5a5d;--line:#aab9b9;--blue:#176c75;--blue-strong:#165a62;--blue-soft:#edf5f4;color:#17272b;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;background:#fff;border:0}.reader-theme[data-reader-theme=dark] .article-summary,.reader-theme[data-reader-theme=dark] .article p,.reader-theme[data-reader-theme=dark] .article li,.reader-theme[data-reader-theme=dark] .course-study-note p{color:#26383b}.reader-theme[data-reader-theme=dark] .course-code-block,.reader-theme[data-reader-theme=dark] .code{color:#17272b;background:#f0f3f3;border-color:#aab9b9}.reader-theme[data-reader-theme=dark] .course-table-scroll table{background:#fff}.reader-theme[data-reader-theme=dark] .course-table-scroll th,.reader-theme[data-reader-theme=dark] .article-table th{color:#17272b;background:#edf1f1}}.purchase-modal-backdrop{z-index:100;background:#12202a73;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.purchase-modal{border:1px solid var(--line);background:var(--white);width:min(100%,440px);color:var(--ink);padding:34px 28px;position:relative;box-shadow:0 18px 48px #12202a38}.purchase-modal h2{margin:0;padding-right:24px;font-size:24px;line-height:1.4}.purchase-modal-close{width:34px;height:34px;color:var(--muted);background:0 0;border:0;place-items:center;padding:0;display:grid;position:absolute;top:12px;right:12px}.purchase-modal-close:focus-visible{outline:2px solid var(--blue);outline-offset:2px}@media (max-width:900px){.hero-grid,.bundle,.notice,.reading-layout,.progress-grid{grid-template-columns:1fr}.reading-layout{gap:28px}.toc-desktop,.reading-layout>aside:last-child{display:none}.toc-mobile{border-bottom:1px solid var(--line);padding-bottom:14px;display:block}.toc-mobile summary{padding:10px 0}.toc-mobile-list{gap:0;padding-top:8px;display:grid}.toc-mobile-list a{color:var(--muted);padding:10px 0;font-size:13px}.toc-mobile-list a.active{color:var(--blue);font-weight:700}.navlinks,.desktop-search-link,.desktop-courses-link,.desktop-login-link,.user-menu{display:none}.mobile-menu{display:inline-flex}.mobile-navigation{border-top:1px solid var(--line);gap:0;padding-top:8px;padding-bottom:14px;display:grid}.mobile-navigation a{border-bottom:1px solid var(--line);color:var(--muted);padding:12px 0;font-size:14px}.mobile-navigation a:hover{color:var(--ink)}.mobile-navigation a:focus-visible,.mobile-navigation button:focus-visible{outline:2px solid var(--blue);outline-offset:2px}}@media (max-width:768px){.user-menu-trigger .user-name{display:none}.user-menu-trigger{padding-right:8px}}@media (max-width:640px){.shell{padding:0 18px}.nav{height:62px}.nav-actions>.btn.ghost:not(.mobile-menu){display:none}.hero{padding:64px 0 58px}h1{font-size:46px}.hero-copy{font-size:17px}.terminal-preview{margin-top:20px}.section,.route-section,.bundle-section{padding:60px 0}.notice-section{padding:48px 0}.faq-section{padding:52px 0}.section-head{display:block}.section-intro{margin-top:16px}.problem-grid,.stages,.audience,.dashboard-grid,.benefits{grid-template-columns:1fr}.problem{min-height:auto}.bundle-main,.bundle-side{padding:24px}.bundle h3{font-size:28px}.bundle-price{font-size:44px}.notice{gap:22px;padding:22px}.cta{padding:60px 0;display:block}.home-cta{margin:12px 18px 24px;padding:48px 24px;display:block}.home-cta .btn{margin-top:22px}.auth-wrap{padding:54px 0}.auth-panel{padding:24px}.article h1{font-size:38px}.article p,.article li{font-size:15px}.footer{display:block}.footer span{margin-top:8px;display:block}.account-page{padding-top:32px;padding-bottom:56px}.account-section{padding:20px}.profile-card{grid-template-columns:80px minmax(0,1fr)}.profile-editor>.btn{grid-area:auto/1/auto/-1;justify-self:start}.profile-edit-form,.profile-message{grid-column:1/-1}.avatar-presets{grid-template-columns:repeat(3,48px)}.recent-learning,.account-security,.stage-completion-feedback{flex-direction:column;align-items:flex-start}.lesson-completion{justify-items:start}.stage-completion-actions{justify-content:flex-start}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal,.reveal.reveal-in,.terminal-preview code,.stage-card,.stage-card:before,.btn,.route-row,summary:after,.brand-logo{transition:none;animation:none;transform:none}.reveal{opacity:1}details[open] p{animation:none}}@media (max-width:640px){.course-learning-cta{display:block}.course-learning-cta .btn{width:100%;margin-top:16px}.home-guide{padding:30px 18px;display:block}.home-guide h2{font-size:24px}.home-guide .text-link{margin-top:18px}.guide-header{padding-top:0}.guide-header h1{font-size:38px}.guide-lead{font-size:17px}.guide-section{padding:34px 0}.guide-section p,.guide-section li{font-size:15px}.guide-steps li{padding-left:42px}.guide-principles,.guide-safety{padding-left:16px}.guide-cta{padding:22px;display:block}.guide-cta h2{font-size:25px}.guide-cta .btn{margin-top:20px}}
