/* The approved black / white / yellow fieldguide, with mobile reading first. */
:root{--ink:#101010;--muted:#646464;--line:#dedee2;--paper:#fff;--soft:#f5f5f6;--yellow:#ffed00;--container:1320px;--header:72px;--radius:8px;font-synthesis:none;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:0}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,label{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}svg{flex-shrink:0;vertical-align:middle}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.25;overflow-wrap:anywhere}h1,h2{font-weight:900;letter-spacing:-.025em}p{line-height:1.8}::selection{background:#fff47b;color:#101010}:focus-visible{outline:3px solid #3868da;outline-offset:4px}button:focus-visible,input:focus-visible{outline-offset:3px}[hidden]{display:none!important}.container{width:min(calc(100% - 80px),var(--container));margin-inline:auto}.skip-link{position:fixed;top:8px;left:8px;transform:translateY(-150%);background:var(--yellow);padding:12px;z-index:100}.skip-link:focus{transform:none}.site-header{height:var(--header);background:#101010;color:white;position:sticky;top:0;z-index:40}.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;position:relative;gap:20px}.brand{font-size:26px;line-height:1;white-space:nowrap;font-weight:900;letter-spacing:-.05em}.brand span{color:var(--yellow)}.desktop-nav{display:flex;align-items:center;gap:40px;font-size:16px;font-weight:700;height:100%}.desktop-nav a{display:flex;align-items:center;position:relative;height:100%}.desktop-nav a:hover:after{content:"";height:3px;background:var(--yellow);position:absolute;left:0;right:0;bottom:15px}.menu-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;background:transparent;border:0;color:white}.mobile-menu{position:absolute;right:0;top:calc(var(--header) - 3px);width:min(340px,calc(100vw - 40px));padding:8px 16px;background:#101010;border:1px solid #393939;border-radius:0 0 8px 8px;box-shadow:0 12px 25px #0002}.mobile-menu a{display:flex;align-items:center;min-height:50px;border-bottom:1px solid #333;font-size:17px}.mobile-menu a:last-child{border:0}.eyebrow{font-size:15px;font-weight:700;line-height:1.5;margin:0 0 17px;letter-spacing:.015em}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;border:1.5px solid transparent;min-height:52px;padding:13px 24px;font-size:18px;font-weight:800;border-radius:7px;line-height:1.4;transition:background .15s,transform .15s}.button:hover{transform:translateY(-1px)}.button-yellow{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}.button-yellow:hover{background:#f2df00;border-color:#f2df00}.button-outline{background:white;border-color:#151515}.button-outline:hover{background:#f7f7f7}.text-link{display:inline-flex;gap:10px;align-items:center;min-height:44px;font-size:16px;font-weight:700;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}.home-hero{display:grid;grid-template-columns:1.03fr 1fr;align-items:center;gap:52px;padding-block:44px 42px}.hero-copy h1{font-size:clamp(42px,4.6vw,66px);line-height:1.26;letter-spacing:-.055em;margin:0 0 22px;white-space:nowrap}.marker{background:linear-gradient(transparent 80%,var(--yellow) 80%,var(--yellow) 95%,transparent 95%);padding-bottom:3px}.hero-subtitle{font-size:20px;line-height:1.7;margin-bottom:24px;letter-spacing:-.015em}.hero-actions{display:flex;gap:28px;align-items:center;flex-wrap:wrap}.hero-actions .button{min-height:58px;padding-inline:28px;font-size:20px}.method-panel{border:1px solid var(--line);border-radius:8px;padding:22px 26px;scroll-margin-top:96px}.method-panel h2{font-size:27px;margin:0 0 10px}.method-row{display:flex;gap:20px;align-items:center;min-height:91px;padding:13px 0;border-bottom:1px solid var(--line)}.method-row:last-child{border-bottom:0}.method-row>svg{margin-left:auto}.method-row strong{display:block;font-size:22px;font-weight:800;line-height:1.4;margin-bottom:3px}.method-row small{font-size:16px;color:var(--muted);line-height:1.6;display:block}.method-icon{background:#fff8b0;border-radius:50%;display:flex;align-items:center;justify-content:center;width:52px;height:52px;flex-shrink:0}.stages-band{background:var(--soft);padding:27px 0 19px;scroll-margin-top:var(--header)}.section-title{font-size:30px;margin:0 0 18px}.stage-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.stage-card{display:flex;flex-direction:column;background:white;border:1px solid #d7d8de;border-radius:7px;padding:18px 18px 0;transition:border-color .15s}.stage-card:hover,.project-card:hover,.category-link:hover,.feature-card:hover{border-color:#151515}.stage-title{display:flex;align-items:center;gap:15px;margin-bottom:13px}.stage-title h3{margin:0;font-size:20px;font-weight:850}.stage-number{font-family:"Arial Narrow","Helvetica Neue",sans-serif;font-size:39px;font-style:italic;line-height:1;font-weight:900;letter-spacing:-.09em;position:relative;padding-right:10px}.stage-number i{display:inline-block;width:5px;height:28px;background:var(--yellow);margin-left:7px;transform:rotate(26deg);position:relative;top:3px}.stage-body p{font-size:15px;color:#4c4c4c;line-height:1.7;margin:0 0 4px;overflow-wrap:anywhere}.stage-body p span{display:inline-block;color:#777;margin-right:7px}.stage-body{margin-bottom:14px}.stage-link{display:flex;justify-content:space-between;align-items:center;gap:8px;border-top:1px solid var(--line);padding-block:12px;min-height:48px;font-weight:750;font-size:16px;margin-top:auto}.stage-note{text-align:center;font-size:14px;color:var(--muted);margin:10px 0 0;line-height:1.7}.home-categories{padding-top:28px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.section-heading .section-title{margin-bottom:12px}.section-heading .text-link{flex-shrink:0}.category-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.category-link{display:flex;align-items:center;gap:12px;padding:15px 13px;border:1px solid var(--line);border-radius:7px;min-height:78px;transition:border-color .15s}.category-link strong{font-size:15px;line-height:1.5;display:block;font-weight:750}.category-link small{display:block;font-size:13px;color:var(--muted);margin-top:3px}.category-link>svg{margin-left:auto;width:17px}.category-icon{display:flex;align-items:center;justify-content:center;flex-shrink:0}.home-features{padding-top:28px;padding-bottom:34px}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-card{display:flex;align-items:center;gap:14px;border:1px solid var(--line);padding:18px;border-radius:7px;flex-wrap:wrap}.feature-card>svg{width:33px}.feature-card>div{flex:1;min-width:150px}.feature-card h3{font-size:18px;margin:0 0 6px;font-weight:800}.feature-card p{font-size:14px;color:var(--muted);line-height:1.6;margin:0}.feature-card>span{display:flex;align-items:center;gap:6px;font-size:14px;font-weight:700;margin-left:auto}.home-endnote{color:var(--muted);font-size:14px;margin:17px 0 0;text-align:center}.site-footer{border-top:1px solid #e6e6e6;padding:28px 0 30px;background:#fafafa}.footer-top{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:15px}.footer-brand{font-size:18px;font-weight:800}.footer-top nav{display:flex;flex-wrap:wrap;gap:24px;font-size:14px}.footer-top nav a{padding-block:8px}.site-footer p{font-size:13px;color:var(--muted);line-height:1.8;margin:4px 0}.site-footer .fineprint{font-size:12px;color:#777}.page-shell{padding-top:28px;padding-bottom:64px}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:9px;color:#666;font-size:13px;line-height:1.7;min-height:24px;margin:0 0 32px}.breadcrumbs a{text-decoration:underline;text-decoration-color:#cfcfcf;text-underline-offset:4px}.breadcrumbs>span[aria-hidden]{color:#aaa}.breadcrumbs [aria-current]{color:#383838}.page-intro{margin:0 0 32px;max-width:860px}.page-intro h1{font-size:44px;margin:0 0 20px;line-height:1.3}.page-intro>p:not(.eyebrow){font-size:18px;line-height:1.9;color:#525252;max-width:790px;margin-bottom:16px}.category-jumps{display:flex;gap:12px;flex-wrap:wrap;padding:15px 0 27px;border-bottom:1px solid var(--line)}.category-jumps a{min-height:44px;display:flex;align-items:center;padding:8px 15px;background:#f5f5f5;border-radius:6px;font-size:15px;font-weight:650}.category-jumps a:hover{background:#fff8b0}.catalog-section{padding-top:42px;scroll-margin-top:90px}.catalog-section h2{font-size:30px;margin:0}.catalog-section .eyebrow{font-size:13px;margin-bottom:5px;color:#666}.section-description{font-size:17px;line-height:1.9;color:#666;margin:16px 0 24px}.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.project-card{border:1px solid var(--line);border-radius:8px;padding:23px;display:flex;flex-direction:column;transition:border-color .15s;min-width:0}.card-kicker{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:#777;margin-bottom:20px}.card-kicker span:last-child{background:#f2f2f2;border-radius:4px;padding:4px 7px}.project-card h3{font-size:22px;margin:0 0 13px;font-weight:800;line-height:1.4}.project-card p{font-size:16px;color:#5c5c5c;line-height:1.85;margin:0 0 20px}.card-action{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:15px;font-weight:750;margin-top:auto;border-top:1px solid #ededed;padding-top:14px;min-height:44px}.next-block{border-top:1px solid var(--line);margin-top:50px;padding-top:30px}.next-block>h2{font-size:25px;margin-bottom:20px}.info-note{background:#fffce3;border-left:3px solid #e4cd00;padding:17px 20px;font-size:16px;line-height:1.85;margin:0 0 30px}.stage-guide-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:35px;margin:0 0 45px;align-items:start}.guide-order{border:1px solid var(--line);padding:26px;border-radius:8px}.guide-order h2{font-size:24px;margin:0 0 20px}.guide-order ol{padding:0;margin:0;list-style:none}.guide-order li{display:flex;gap:18px;align-items:start;margin:0 0 20px}.guide-order li:last-child{margin:0}.guide-order li>span{background:var(--yellow);padding:4px 6px;font-size:14px;line-height:1.6;font-weight:850;border-radius:4px;font-variant-numeric:tabular-nums}.guide-order strong{font-size:18px;line-height:1.5}.guide-order li p{font-size:15px;color:#666;margin:6px 0 0;line-height:1.8}.stage-output{background:#f4f4f4;padding:28px;border-radius:8px}.stage-output h2{font-size:27px;line-height:1.5;margin:0 0 17px}.stage-output p:last-child{font-size:16px;color:#656565;margin:0}.stage-output .eyebrow{font-size:14px}.stage-projects .section-heading h2{font-size:28px;margin:0}.group-heading{font-size:22px;margin:33px 0 18px}.narrow-page{max-width:960px}.narrow-page .page-intro{max-width:800px}.prose{max-width:800px;margin:0 auto;font-size:18px;line-height:1.9}.prose h2{font-size:27px;line-height:1.5;margin:40px 0 20px}.prose h2:first-child{margin-top:0}.prose p{line-height:1.95;margin-bottom:21px;overflow-wrap:anywhere}.prose li{line-height:1.95;margin-bottom:12px}.prose ul,.prose ol{padding-left:1.4em}.prose a{color:#183d96;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}.prose .table-shell{margin:24px 0}.narrow-page .stage-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin:32px 0 40px}.guide-start{margin:34px auto 0;max-width:800px}.article-top{padding-top:25px}.article-top .breadcrumbs{margin-bottom:31px}.article-header{max-width:900px;margin-left:calc(260px + 52px);padding-bottom:28px}.article-header h1{font-size:44px;line-height:1.35;margin:0 0 22px}.article-deck{font-size:18px;color:#555;line-height:1.95;margin-bottom:22px;max-width:760px}.deliverable{border:1px solid var(--line);padding:19px 22px;border-radius:8px;margin-bottom:20px;max-width:760px}.deliverable>span{display:block;font-size:14px;color:#777;margin-bottom:9px}.deliverable>strong{font-size:18px;font-weight:650;line-height:1.75;display:block}.reading-shortcuts{display:flex;align-items:center;gap:10px;flex-wrap:wrap;max-width:760px}.reading-shortcuts>span{font-size:13px;color:#777;margin-right:5px}.reading-shortcuts a{display:flex;align-items:center;padding:7px 13px;min-height:42px;font-size:14px;font-weight:700;background:#f5f5f5;border-radius:5px}.reading-shortcuts a:hover{background:#fff8b0}.article-layout{display:grid;grid-template-columns:260px minmax(0,800px);gap:52px;align-items:start;padding-bottom:70px}.article-toc{position:sticky;top:calc(var(--header) + 24px);border:1px solid var(--line);border-radius:8px;padding:20px 18px;max-height:calc(100vh - var(--header) - 50px);overflow:auto}.toc-header{display:flex;align-items:center;justify-content:space-between;font-size:17px;font-weight:800;margin:0 0 14px}.toc-header span{font-size:12px;color:#777;font-weight:400}.article-toc nav a,.toc-dialog nav a{display:flex;gap:11px;align-items:baseline;padding:9px 6px;font-size:14px;line-height:1.6;border-radius:4px}.article-toc nav a>span,.toc-dialog nav a>span{font-size:12px;color:#888;font-variant-numeric:tabular-nums}.article-toc a:hover,.article-toc a[aria-current]{background:#fff9bf}.toc-tools{display:flex;justify-content:space-between;align-items:center;margin-top:15px;padding:16px 6px 0;border-top:1px solid var(--line);font-size:14px;font-weight:650}.article-body{font-size:18px;line-height:1.9;min-width:0;max-width:800px}.article-section{scroll-margin-top:102px;padding-bottom:16px}.article-section>h2{font-size:28px;line-height:1.5;margin:37px 0 24px;padding-top:8px;display:flex;align-items:baseline;gap:14px;letter-spacing:-.02em}.article-section:first-child>h2{margin-top:0}.article-section>h2>span{font-size:20px;font-style:italic;color:#666;font-variant-numeric:tabular-nums}.article-body p{font-size:18px;line-height:1.95;margin:0 0 22px;overflow-wrap:anywhere}.article-body b{font-weight:750;color:#181818}.article-body a:not(.button):not(.article-pagination a){text-decoration:underline;text-underline-offset:4px;text-decoration-color:#a3b0cd;color:#183d96;overflow-wrap:anywhere}.article-body ol,.article-body ul{padding-left:1.5em;margin:24px 0}.article-body li{font-size:18px;line-height:1.95;margin-bottom:18px;overflow-wrap:anywhere}.article-body ol>li::marker{font-weight:800}.table-shell{margin:25px 0 28px;max-width:100%;min-width:0}.table-hint{font-size:12px;color:#777;margin-bottom:7px;line-height:1.5}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:7px;max-width:100%;scrollbar-width:thin;overscroll-behavior-inline:contain}table{width:100%;min-width:var(--table-min,440px);border-collapse:collapse;table-layout:auto;font-size:15px;line-height:1.8}th,td{text-align:left;vertical-align:top;padding:13px 15px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);word-break:normal;overflow-wrap:anywhere}th{font-weight:700;background:#f3f3f4}th:last-child,td:last-child{border-right:0}tr:last-child td{border-bottom:0}.article-body td p,.article-body th p,.prose td p,.prose th p{font-size:15px;line-height:1.85;margin:0}.article-body td ul{padding-left:1em;margin:0}th p{font-weight:700}.prompt-box{border:1px solid #d9dce3;border-radius:8px;overflow:hidden;background:#f6f7f9;margin:25px 0 30px;max-width:100%;min-width:0}.prompt-label{display:flex;align-items:center;justify-content:space-between;gap:14px;border-bottom:1px solid #dddfe4;padding:12px 16px;font-size:13px;font-weight:700;line-height:1.7}.copy-button{flex-shrink:0;background:var(--yellow);border:0;border-radius:5px;padding:10px 14px;min-height:44px;font-size:14px;font-weight:700}.prompt-box pre{margin:0;padding:20px;white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;font:16px/1.9 "PingFang SC","Microsoft YaHei",sans-serif;max-width:100%;tab-size:2}.prompt-box code{font:inherit}.task-check{display:flex;align-items:flex-start;gap:12px;border:1px solid #e2e2e5;border-radius:6px;padding:15px;margin:12px 0;font-size:17px;line-height:1.85;cursor:pointer}.task-check input{width:22px;height:22px;flex:0 0 22px;margin:4px 0 0;accent-color:#101010;cursor:pointer}.task-check:has(input:checked){background:#fffde7;border-color:#d8c944}.task-check input:checked+span{color:#626253}.article-finish{padding:28px;background:#f7f7f4;border:1px solid #e1e1de;border-radius:8px;margin:32px 0}.article-finish h2{font-size:25px;line-height:1.5;margin:0 0 13px}.article-finish p{font-size:16px;line-height:1.8}.article-finish .eyebrow{font-size:13px;margin-bottom:10px;color:#777}.article-finish .button{font-size:16px}.article-pagination{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:30px 0 0}.article-pagination a{border:1px solid var(--line);border-radius:7px;padding:18px;position:relative;display:flex;flex-direction:column;padding-right:42px}.article-pagination a:hover{border-color:#111}.article-pagination small{font-size:12px;color:#777;margin-bottom:7px}.article-pagination strong{font-size:16px;font-weight:650;line-height:1.6}.article-pagination svg{position:absolute;right:14px;top:50%}.mobile-reading-bar{display:none}.toc-dialog{border:0;border-radius:12px;padding:0;width:min(92vw,500px);max-height:85dvh;box-shadow:0 10px 70px #0004}.toc-dialog::backdrop{background:#0009}.dialog-title{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;background:white;border-bottom:1px solid var(--line);padding:16px 18px;z-index:2}.dialog-title h2{font-size:18px;margin:0}.toc-close{display:flex;align-items:center;justify-content:center;min-height:44px;width:44px;border:0;background:transparent}.toc-dialog nav{padding:10px 14px 20px}.toc-dialog nav a{font-size:17px;min-height:49px;padding:10px 9px}.toc-dialog nav a:hover{background:#fff9bf}.toast{position:fixed;left:50%;bottom:95px;transform:translateX(-50%);max-width:90vw;background:#171717;color:white;padding:13px 20px;border-radius:7px;box-shadow:0 3px 20px #0002;font-size:15px;line-height:1.6;z-index:70;text-align:center}.copy-fallback{position:fixed;inset:20% 10%;z-index:80;background:white;padding:20px;border:2px solid black;border-radius:8px}.copy-fallback textarea{display:block;width:100%;height:180px;font:16px/1.8 sans-serif;margin:12px 0}.copy-fallback button{padding:10px 16px;min-height:44px}.article-page .site-footer{padding-bottom:35px}
@media(min-width:1500px){.home-hero{padding-block:52px 48px;gap:65px}.hero-copy h1{font-size:67px}.stage-card{padding:20px 20px 0}.stage-body p{font-size:16px}}
@media(max-width:1180px){.container{width:calc(100% - 56px)}.home-hero{gap:30px}.hero-copy h1{font-size:48px}.hero-subtitle{font-size:18px}.method-panel{padding:20px}.method-panel h2{font-size:24px}.method-row{gap:14px}.method-row strong{font-size:20px}.stage-title{gap:11px}.stage-title h3{font-size:18px}.stage-number{font-size:33px}.stage-card{padding:16px 14px 0}.stage-body p{font-size:14px}.category-link{padding:14px 10px;gap:8px}.category-link strong{font-size:14px}.category-link>svg{display:none}.category-icon svg{width:24px}.article-layout{grid-template-columns:224px minmax(0,800px);gap:36px}.article-header{margin-left:260px}.article-toc{padding:18px 13px}.article-toc nav a{font-size:13px}.feature-card>span{width:100%;border-top:1px solid #eee;padding-top:10px;justify-content:space-between}}
@media(max-width:960px){.desktop-nav{gap:25px;font-size:15px}.brand{font-size:22px}.home-hero{gap:24px}.hero-copy h1{font-size:40px}.hero-actions{gap:10px}.hero-actions .button{font-size:17px;min-height:52px}.hero-subtitle{font-size:17px}.method-panel h2{font-size:22px}.method-row strong{font-size:18px}.method-row small{font-size:14px}.method-icon{width:42px;height:42px}.stage-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stage-title h3{font-size:21px}.stage-number{font-size:37px}.stage-body p{font-size:16px}.category-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.category-link strong{font-size:15px}.category-link>svg{display:block}.project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-grid{gap:12px}.feature-card{padding:16px;gap:11px}.feature-card>div{min-width:0}.feature-card h3{font-size:16px}.feature-card>svg{width:26px}.article-layout{grid-template-columns:1fr;max-width:780px}.article-toc{display:none}.article-header{margin-left:0;max-width:780px}.article-top{max-width:780px}.mobile-reading-bar{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:1fr 2fr;gap:12px;background:#fff;border-top:1px solid var(--line);padding:10px 20px calc(10px + env(safe-area-inset-bottom));z-index:45}.mobile-reading-bar .button{min-height:48px;font-size:17px;padding:10px;gap:9px}.article-page .site-footer{padding-bottom:105px}.article-layout{padding-bottom:45px}.stage-guide-layout{grid-template-columns:1.3fr 1fr;gap:20px}.stage-output{padding:23px}.stage-output h2{font-size:23px}.stage-projects .section-heading{align-items:start}.stage-projects .section-heading h2{font-size:25px}}
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@media(max-width:380px){.container{width:calc(100% - 36px)}.brand{font-size:19px}.hero-copy h1{font-size:34px}.hero-subtitle{font-size:16px}.section-title{font-size:23px}.stage-title h3{font-size:21px}.stage-body p{font-size:16px}.category-link strong{font-size:16px}.article-header h1{font-size:32px}.reading-shortcuts a{font-size:13px;padding-inline:9px}.prompt-label{flex-wrap:wrap}.copy-button{margin-left:auto}.article-section>h2{font-size:23px}.toc-dialog nav a{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{.site-header,.article-toc,.mobile-reading-bar,.site-footer,.reading-shortcuts,.copy-button,.article-pagination,.article-finish,.breadcrumbs{display:none!important}.article-layout,.article-header{display:block;margin:0;width:100%;max-width:none}.container{width:100%}.table-scroll{overflow:visible}table{min-width:0}.article-section{break-inside:auto}.article-section h2{break-after:avoid}}

/* Project discovery: a concrete teaching quote, audience and editorial difficulty. */
.card-meta{margin:0 0 17px;padding:15px 0 0;border-top:1px solid #ededed;display:grid;gap:11px;min-width:0}
.meta-row{display:grid;grid-template-columns:70px minmax(0,1fr);align-items:baseline;gap:9px;font-size:14px;line-height:1.85}
.meta-row dt{margin:0;color:#777;font-size:12px;letter-spacing:.01em}
.meta-row dd{margin:0;min-width:0;color:#464646;overflow-wrap:anywhere}
.meta-price dd{font-size:17px;line-height:1.7;color:#151515;font-weight:800;font-variant-numeric:tabular-nums}
.meta-difficulty dd{display:flex;align-items:center;gap:10px;flex-wrap:wrap;line-height:1.8}
.difficulty-stars{display:inline-flex;font-size:18px;line-height:1.2;letter-spacing:2px;white-space:nowrap}
.stars-filled{color:var(--difficulty-color,#a86200)}.stars-empty{color:var(--difficulty-empty,#e4c797)}.difficulty-label{font-size:13px;color:#666}
.card-legend{font-size:13px;line-height:1.9;color:#747474;margin:0 0 19px;max-width:100%}
.card-legend a{display:inline-block;min-height:32px;text-decoration:underline;text-underline-offset:4px;margin-left:8px;color:#4c4c4c}
.project-card>p{margin-bottom:15px}.feature-card .card-meta{width:100%;flex:0 0 100%;margin:4px 0 0}
.feature-card .meta-row{grid-template-columns:70px minmax(0,1fr)}
.feature-card>span{width:100%;justify-content:space-between;border-top:1px solid #ededed;padding-top:13px;min-height:44px;margin:0}
.difficulty-guide strong{font-weight:750}
#card-guide{scroll-margin-top:100px}
.difficulty-level-1{--difficulty-color:#187247;--difficulty-empty:#aacdbb;--difficulty-tint:#f0f8f3;--difficulty-border:#cee3d5}
.difficulty-level-2{--difficulty-color:#a86200;--difficulty-empty:#e4c797;--difficulty-tint:#fffaed;--difficulty-border:#edddb7}
.difficulty-level-3{--difficulty-color:#b54632;--difficulty-empty:#e0b9b2;--difficulty-tint:#fff3ef;--difficulty-border:#edd0c8}
.difficulty-key{border:1px solid #dedee2;border-radius:8px;padding:19px 20px;margin:0 0 10px;background:#fff}
.difficulty-key-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:15px}
.difficulty-key-heading h3{font-size:18px;margin:0;font-weight:800;line-height:1.5}
.difficulty-key-heading>span{font-size:13px;color:#777;line-height:1.8}
.difficulty-key-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}
.difficulty-key-item{border:1px solid var(--difficulty-border);background:var(--difficulty-tint);padding:14px 15px;border-radius:6px;min-width:0}
.difficulty-key-label{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:8px;line-height:1.6}
.difficulty-key-label>strong{font-size:15px;font-weight:750;color:#333}
.difficulty-key-item p{margin:0;color:#535353;font-size:14px;line-height:1.9;overflow-wrap:anywhere}
.difficulty-guide{padding:0!important;list-style:none}.difficulty-guide li{padding:16px 0;border-bottom:1px solid #ececec}.difficulty-guide li>strong{display:flex;align-items:center;gap:12px}.difficulty-guide li p{margin:10px 0 0;font-size:17px}
@media(max-width:700px){.difficulty-key{padding:17px 15px;margin-bottom:9px}.difficulty-key-heading{display:block;margin-bottom:13px}.difficulty-key-heading h3{font-size:19px;margin-bottom:4px}.difficulty-key-heading>span{font-size:13px}.difficulty-key-grid{grid-template-columns:1fr;gap:10px}.difficulty-key-item{padding:14px}.difficulty-key-label{gap:11px;margin-bottom:7px}.difficulty-key-label>strong{font-size:16px}.difficulty-key-item p{font-size:15px;line-height:1.85}}
@media(max-width:700px){.card-meta{padding-top:14px;gap:10px;margin-bottom:17px}.meta-row{font-size:15px;grid-template-columns:72px minmax(0,1fr);gap:8px;line-height:1.85}.meta-row dt{font-size:13px}.meta-price dd{font-size:18px}.difficulty-label{font-size:14px}.difficulty-stars{font-size:19px}.card-legend{font-size:13px;margin-bottom:17px;line-height:1.95}.card-legend a{margin-left:0;min-height:36px}.feature-card .card-meta{grid-column:1/-1;grid-template-columns:1fr;width:100%;margin-top:3px}.feature-card .meta-row{grid-template-columns:72px minmax(0,1fr)}.feature-card>span{grid-column:1/-1;margin:0;padding-top:13px;font-size:15px}.feature-card{row-gap:13px}#card-guide{scroll-margin-top:84px}}

/* A stable easy-to-hard reading order, without a filtering interface. */
.difficulty-project-group{margin-top:34px;scroll-margin-top:96px}
.difficulty-group-heading{display:flex;align-items:center;flex-wrap:wrap;gap:13px;font-size:25px;line-height:1.5;margin:0 0 18px}
.difficulty-group-heading .difficulty-stars{font-size:24px;letter-spacing:3px}
.difficulty-group-heading small{font-size:14px;font-weight:400;color:#777;margin-left:4px}
.sort-note{font-size:15px;line-height:1.9;color:#666;margin:0 0 20px}
@media(max-width:700px){.difficulty-project-group{margin-top:27px;scroll-margin-top:84px}.difficulty-group-heading{font-size:22px;gap:10px;margin-bottom:17px}.difficulty-group-heading .difficulty-stars{font-size:22px}.difficulty-group-heading small{font-size:13px}.sort-note{font-size:14px;line-height:1.9}}