:root{--ink:#252925;--muted:#777970;--line:#e7e6df;--paper:#fbfaf6;--accent:#b64f30;--pale:#f7e9df;--green:#446a52;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:100px}*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.85}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #d98a56;outline-offset:4px}button{color:inherit}img{max-width:100%;display:block}p{margin:0 0 18px}h1,h2,h3{line-height:1.4;letter-spacing:-.035em;margin:0;color:var(--ink)}h1{font-size:clamp(35px,4.1vw,58px);line-height:1.25;font-weight:750}h1 em{font-style:normal;color:var(--accent)}h2{font-size:28px}h3{font-size:22px}strong{font-weight:650}.skip-link{position:fixed;top:-70px;background:white;padding:12px;z-index:50}.skip-link:focus{top:0}.reading-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:60}.reading-progress span{display:block;background:var(--accent);width:0;height:100%}.site-header{height:82px;display:flex;align-items:center;justify-content:space-between;padding:0 5%;border-bottom:1px solid var(--line);background:#fbfaf6f5;position:sticky;top:0;z-index:10;backdrop-filter:blur(14px)}.brand{color:var(--ink);display:flex;align-items:center;gap:11px;font-size:20px;font-weight:750;letter-spacing:-.6px}.brand:hover{text-decoration:none}.brand-mark{color:var(--accent);font-size:37px;line-height:1}.site-header nav{display:flex;align-items:center;gap:30px;font-size:14px}.site-header nav>a:first-child{color:var(--muted)}.button{background:var(--accent);color:white;padding:13px 22px;display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--accent);border-radius:6px;font-weight:600;line-height:1.5}.button:hover{background:#9a3e25;color:white;text-decoration:none}.button.small{font-size:13px;padding:10px 17px}.button.secondary{background:white;color:var(--accent)}.text-button{font-size:14px;font-weight:550}.layout{max-width:1440px;margin:0 auto;display:grid;grid-template-columns:236px minmax(0,1fr);padding:0 40px;gap:64px}.sidebar{position:sticky;top:110px;height:calc(100vh - 140px);overflow:auto;margin-top:38px;font-size:13px}.sidebar details>summary{list-style:none;font-weight:700;font-size:14px;margin:0 0 20px;padding-left:15px}.sidebar summary::-webkit-details-marker{display:none}.sidebar nav{display:grid;border-left:1px solid var(--line);gap:4px}.sidebar nav a{display:block;padding:10px 14px;color:#64675f;border-left:2px solid transparent;margin-left:-1px;line-height:1.6}.sidebar nav a:hover,.sidebar nav a.active{color:var(--accent);background:#f4ebe3;border-color:var(--accent);text-decoration:none}.sidebar-note{border-top:1px solid var(--line);padding:22px 15px;margin-top:25px;color:var(--muted);display:grid;gap:3px;font-size:12px}.sidebar-note a{margin-top:12px}main{min-width:0;max-width:930px;padding-bottom:36px}.breadcrumb{display:flex;gap:12px;align-items:center;font-size:12px;color:var(--muted);padding:30px 0 28px}.breadcrumb a{color:var(--muted)}.intro{padding:13px 0 40px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--accent);text-transform:uppercase;display:block;margin-bottom:15px}.intro-lead{font-size:18px;line-height:1.9;color:#62665f;margin-top:24px;margin-bottom:22px}.intro-meta{display:flex;gap:18px;color:var(--muted);font-size:12px;margin-bottom:28px}.intro-meta span+span{border-left:1px solid #cfcfc4;padding-left:18px}.intro-actions{display:flex;align-items:center;gap:23px;flex-wrap:wrap}.preflight{padding:28px 30px;border-left:3px solid #8a997d;background:#f0f1e9}.preflight h2{font-size:21px;margin-bottom:10px}.preflight .eyebrow{color:var(--green);margin-bottom:8px}.preflight p{font-size:14px;margin-bottom:0}.preflight-note{border-top:1px solid #dce0d2;margin-top:18px!important;padding-top:15px;color:#72796c;font-size:12px!important}.resources{padding:30px 0 20px;margin-bottom:15px}.resources h2{font-size:15px;letter-spacing:0;margin-bottom:8px}.resource-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:19px 0;border-bottom:1px solid var(--line);font-size:14px}.resource-row>div:first-child{display:flex;gap:20px;align-items:center}.resource-row b{font-family:ui-monospace,monospace;font-size:12px;color:var(--accent)}.resource-row strong,.resource-row small{display:block}.resource-row small{font-size:12px;color:var(--muted)}.resource-row a{font-size:13px;white-space:nowrap}.resource-links{display:flex;gap:18px}.chapter{padding-top:56px}.chapter-heading{border-top:1px solid #cbcec1;padding-top:26px;margin-bottom:30px}.chapter-kicker{font-size:11px;letter-spacing:.14em;font-weight:650;color:var(--accent);display:block;margin-bottom:10px}.chapter-heading h2{font-size:31px;margin-bottom:12px}.chapter-heading p{font-size:15px;color:var(--muted);margin:0}.step{padding:10px 0 28px;scroll-margin-top:110px}.step h3{display:flex;align-items:baseline;gap:13px;margin-bottom:21px;font-size:22px}.step-number{color:var(--accent);font-size:13px;font-family:ui-monospace,monospace;font-weight:600;letter-spacing:0;flex:none}.step p{font-size:16px;line-height:1.95}.shot{margin:24px 0 31px;border:1px solid #dedfd5;background:white;border-radius:7px;overflow:hidden}.zoom-shot{display:block;position:relative;width:100%;border:0;background:#ecece6;padding:0;cursor:zoom-in}.zoom-shot img{width:100%;height:auto}.zoom-hint{position:absolute;bottom:12px;right:12px;background:#fffef9ee;border:1px solid #d6d6d0;border-radius:4px;padding:3px 9px;color:#363c35;font-size:10px;box-shadow:0 2px 6px #0001}.shot figcaption{padding:13px 16px;display:flex;align-items:baseline;justify-content:space-between;gap:12px;line-height:1.6;font-size:12px}.fig-caption{color:#464d45}.shot-time{font-size:10px;color:var(--muted);white-space:nowrap}.note{border-left:3px solid #c8a16c;background:#f7f2e6;padding:15px 18px;font-size:13px;line-height:1.8;margin:20px 0 25px}.note.success{background:#eff3eb;border-color:#7d9c79}.extra{border:1px solid var(--line);background:#fffdf8;padding:0 20px;margin:22px 0;border-radius:6px}.extra summary{padding:16px 0;font-weight:600;font-size:14px;cursor:pointer}.extra[open]>summary{border-bottom:1px solid var(--line);margin-bottom:20px}.extra p{font-size:14px}.explain-list{padding-left:23px;font-size:15px}.explain-list li{padding:5px 0}.copy-line{border:1px solid var(--line);padding:13px 15px;display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fffdf8;border-radius:5px}.copy-line code{font-family:inherit;font-size:13px}.copy-line button{background:white;color:var(--accent);border:1px solid #d9b79d;border-radius:3px;padding:5px 9px;font-size:11px;white-space:nowrap}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:5px}table{width:100%;border-collapse:collapse;font-size:14px;min-width:480px}td,th{text-align:left;padding:15px 19px;vertical-align:top;border-bottom:1px solid var(--line)}thead{background:#f0f0e7}td:first-child{font-weight:600;width:32%}tbody tr:last-child td{border-bottom:0}.inline-cta{font-weight:650}.done-checks{display:grid;gap:8px;font-size:14px;color:var(--green);padding:18px 22px;background:#eef3e9;border-radius:5px}.support{background:#f2eee5;padding:26px;display:flex;gap:25px;justify-content:space-between;align-items:center;border-radius:6px}.support .eyebrow{margin-bottom:6px}.support h3{font-size:20px;margin-bottom:10px}.support p{font-size:13px;margin:0}.support button{white-space:nowrap;font-size:12px}.search-label{display:block;font-size:12px;font-weight:600;margin-bottom:6px}#faq-search{width:100%;padding:13px 15px;border:1px solid #cccec3;border-radius:5px;background:white;font-size:14px}.faq-count{font-size:11px;color:var(--muted);margin:9px 0 19px}.faq-item{border-top:1px solid var(--line);padding:16px 2px}.faq-item:last-child{border-bottom:1px solid var(--line)}.faq-item summary{cursor:pointer;font-size:15px;font-weight:550}.faq-item>div{font-size:14px;color:#646b60;padding:16px 18px 2px;line-height:1.9}.faq-empty{padding:20px;font-size:14px}.end-cta{padding:37px 0 39px;margin-top:50px;border-top:1px solid #cdd2c4;border-bottom:1px solid var(--line)}.end-cta h2{font-size:24px;margin-bottom:24px}.end-cta .button{font-size:14px;margin-right:23px}.sources{padding-top:28px;font-size:11px;color:var(--muted);line-height:1.8}.sources h2{font-size:12px;letter-spacing:0;margin-bottom:8px}.sources p{margin-bottom:8px}footer{max-width:1360px;margin:0 auto;padding:27px 40px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted)}footer>div{display:flex;gap:18px;align-items:center}footer a,footer button{font-size:11px;color:var(--muted)}footer button{background:none;border:0;padding:0}#image-dialog{width:min(96vw,1500px);max-width:96vw;max-height:94vh;padding:0;background:#fffdf8;border:0;border-radius:8px;box-shadow:0 12px 60px #0005}dialog::backdrop{background:#171c18cb;backdrop-filter:blur(3px)}.image-dialog-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 18px;border-bottom:1px solid var(--line)}.image-dialog-header p{margin:0;font-size:13px}.image-dialog-header button{flex:none;background:#ecece4;padding:5px 10px;border:0;border-radius:4px;font-size:12px}.image-scroll{overflow:auto;max-height:77vh}.image-scroll img{width:100%;min-width:900px;max-width:none;height:auto}.image-dialog-tip{font-size:11px;color:var(--muted);display:block;padding:8px 18px}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#26352b;color:white;font-size:13px;padding:10px 20px;z-index:100;border-radius:5px;transition:.2s}#toast.visible{opacity:1;transform:translate(-50%,0)}.consent-dialog{width:min(460px,90vw);border:1px solid var(--line);border-radius:8px;padding:25px;font-size:14px;background:var(--paper)}.consent-dialog h2{font-size:21px;margin-bottom:14px}.consent-dialog p{font-size:13px;color:var(--muted)}.consent-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.consent-dialog button{border:1px solid #c7cabe;border-radius:4px;padding:8px 12px;background:white;font-size:13px}.consent-dialog button[data-tutorial-consent="granted"]{background:var(--accent);color:white;border-color:var(--accent)}
@media(min-width:1500px){.layout{gap:85px}}@media(max-width:1050px){.layout{grid-template-columns:190px minmax(0,1fr);gap:35px;padding:0 28px}.brand{font-size:18px}.intro-meta{gap:10px}.intro-meta span+span{padding-left:10px}.resource-row{gap:10px}.resource-links{gap:8px}.shot figcaption{display:block}.shot-time{display:block;margin-top:3px}.support{display:block}.support button{margin-top:15px}}@media(max-width:760px){:root{scroll-padding-top:85px}.site-header{height:68px;padding:0 18px}.brand{font-size:16px;letter-spacing:-.5px;gap:6px}.brand-mark{font-size:29px}.site-header nav{gap:10px}.site-header nav>a:first-child{display:none}.button.small{font-size:11px;padding:9px 10px}.layout{display:block;padding:0 20px}.sidebar{position:relative;top:auto;height:auto;margin:18px 0 0;border:1px solid var(--line);border-radius:5px;background:#f6f5ef;overflow:visible}.sidebar details>summary{display:list-item;list-style:disclosure-closed;margin:0;padding:12px 15px;cursor:pointer;font-size:13px}.sidebar details[open]>summary{list-style:disclosure-open}.sidebar nav{padding:0 12px 12px;border:0;grid-template-columns:1fr 1fr;gap:0}.sidebar nav a{font-size:12px;padding:9px;border:0;margin:0}.sidebar-note{display:none}.breadcrumb{font-size:10px;padding:20px 0}.intro{padding:8px 0 30px}h1{font-size:35px;line-height:1.3}.eyebrow{font-size:10px}.intro-lead{font-size:16px;margin-top:20px}.intro-meta{font-size:10px;gap:10px;flex-wrap:wrap;margin-bottom:23px}.intro-actions{gap:16px}.button{font-size:13px;padding:12px 17px}.text-button{font-size:12px}.preflight{padding:22px 20px}.preflight h2{font-size:20px}.preflight p{font-size:13px}.resources{padding-top:27px}.resource-row{align-items:flex-start;flex-direction:column;gap:8px;padding:16px 0}.resource-row>div:first-child{gap:15px}.resource-row>a,.resource-row>.resource-links{margin-left:31px}.resource-row strong{font-size:14px}.resource-row small{font-size:11px}.chapter{padding-top:36px}.chapter-heading{padding-top:22px;margin-bottom:23px}.chapter-heading h2{font-size:26px}.chapter-heading p{font-size:14px}.step{padding-bottom:15px}.step h3{font-size:20px;gap:10px;margin-bottom:17px}.step p{font-size:15px}.shot{margin:20px -6px 25px}.shot figcaption{font-size:11px;padding:11px 12px}.zoom-hint{font-size:9px;bottom:6px;right:6px}.note{font-size:12px;padding:13px 15px}.extra{padding:0 14px}.extra summary{font-size:13px}.extra p{font-size:13px}.copy-line{flex-direction:column;align-items:flex-start}.support{padding:22px}.support h3{font-size:19px}.end-cta h2{font-size:22px}.end-cta .text-button{display:block;margin-top:19px}footer{padding:23px 20px;display:block;font-size:11px}footer>div{margin-top:8px}.image-dialog-header{padding:10px 12px}.image-dialog-header p{font-size:11px}.image-scroll img{min-width:950px}.sidebar details:not([open]) nav{display:none}}@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}@media print{.site-header,.sidebar,.intro-actions,.zoom-hint,.copy-line button,.support button,footer button,.reading-progress{display:none!important}.layout{display:block;padding:0}main{max-width:none}.shot,.step h3{break-inside:avoid}.extra:not([open]){display:none}.chapter{padding-top:25px}body{background:white;font-size:12px}}

/* Claude Code review revision: clearer hierarchy, useful first-screen imagery,
   persistent mobile navigation and a fit-first screenshot viewer. */
:root{--muted:#5f625a;--line:#e3e3d9;--paper:#faf9f4;scroll-padding-top:110px}
.layout{grid-template-columns:214px minmax(0,1fr);gap:48px;max-width:1480px}
.site-header{background:#faf9f4f5}
.brand-mark{font-size:34px}
.breadcrumb{font-size:12px;padding:25px 0 22px}
.intro{display:grid;grid-template-columns:1.08fr 1fr;gap:28px;align-items:center;padding:8px 0 36px}
.intro-copy{min-width:0}
h1{font-size:clamp(34px,3.4vw,48px);line-height:1.28;letter-spacing:-.045em}
.intro .eyebrow{font-size:12px;letter-spacing:.12em;margin-bottom:15px}
.intro-lead{font-size:16px;line-height:1.85;margin:20px 0 19px}
.intro-meta{font-size:12px;gap:10px;flex-wrap:wrap;margin-bottom:23px;line-height:1.6}
.intro-meta span+span{padding-left:10px}
.intro-actions{gap:14px}
.intro-actions .button{font-size:14px;padding:12px 18px}
.intro-actions .text-button{font-size:12px}
.hero-preview{display:block;min-width:0;background:white;border:1px solid #d9ddd1;border-radius:9px;overflow:hidden;box-shadow:0 5px 22px #2832200b;color:var(--ink);transform:rotate(-1deg);transition:transform .2s,box-shadow .2s}
.hero-preview:hover{transform:rotate(0);text-decoration:none;box-shadow:0 8px 26px #28322012}
.preview-bar{display:flex;justify-content:space-between;padding:12px 15px;font-size:12px;color:var(--muted);border-bottom:1px solid var(--line)}
.preview-bar>span:last-child{color:var(--accent);font-size:17px;line-height:1}
.hero-preview>img{width:100%;height:auto;max-height:270px;object-fit:contain;background:#fff}
.preview-caption{display:flex;gap:12px;align-items:center;padding:15px;border-top:1px solid var(--line);background:#f6f5ee}
.preview-caption strong,.preview-caption small{display:block;line-height:1.6}
.preview-caption strong{font-size:14px;font-weight:600}
.preview-caption small{font-size:12px;color:var(--muted);margin-top:2px}
.preview-number{font:500 13px/32px ui-monospace,monospace;border:1px solid #cdb5a8;color:var(--accent);width:34px;height:34px;text-align:center;border-radius:50%;flex:none}
.preflight{padding:23px 26px}
.preflight-note{font-size:13px!important}
.resource-row{padding:17px 0}
.resource-row small,.resource-row a{font-size:13px}
.resource-row>a,.resource-links a{display:inline-flex;align-items:center;min-height:44px;padding:8px 12px;border:1px solid #dfd9cd;border-radius:5px;background:#fffdf9}
.resource-row a:hover{border-color:#bc8f78;background:#f4ebe3;text-decoration:none}
.sidebar details>summary{font-size:15px}
.toc-current{display:none}
.sidebar-note{font-size:13px;line-height:1.75}
.chapter{padding-top:48px}
.chapter-heading{padding-top:25px;margin-bottom:28px}
.chapter-kicker{font-size:12px}
.step{padding:18px 0 28px}
.step+.step{border-top:1px dashed #d5d8ca;padding-top:32px}
.step h3{align-items:center;font-size:23px;letter-spacing:-.025em;margin-bottom:21px}
.step-number{width:35px;height:35px;border:1.5px solid #c58c70;border-radius:50%;display:inline-grid;place-items:center;font-size:13px;font-weight:550;line-height:1}
.step>p,.chapter>.explain-list,.step>.note,.chapter-heading>p{max-width:43em}
.step p{line-height:1.95}
.shot{box-shadow:0 1px 3px #25331c0b;border-color:#d8ddcf;border-radius:7px;margin-top:25px;margin-bottom:30px}
.zoom-shot{background:#edf0e8}
.zoom-hint{font-size:12px;right:12px;bottom:12px;padding:8px 12px;min-height:36px;border-color:#c4cbbc;color:#34432d;box-shadow:0 2px 8px #14220c15}
.shot figcaption{font-size:13px;padding:15px 18px;background:#fefdf9}
.shot-time{font-size:12px;color:var(--muted)}
.note{font-size:14px;line-height:1.85;padding:16px 20px}
.extra p,.copy-line code{font-size:14px}
.copy-line button{font-size:12px;min-height:40px;padding:7px 13px}
.extra summary,.faq-item summary{min-height:48px}
.explain-list{font-size:16px}
.done-checks{padding:20px 24px}
.sources{font-size:12px}
.sources h2{font-size:14px;margin-bottom:10px}
footer,footer a,footer button{font-size:12px}
footer button{min-height:40px;padding:5px}
#image-dialog{width:min(96vw,1480px);height:94dvh;max-width:96vw;max-height:94dvh;padding:0;overflow:hidden;background:#f4f5ef;border-radius:10px}
.image-dialog-header{min-height:70px;display:grid;grid-template-columns:62px minmax(0,1fr) auto;gap:16px;padding:12px 20px;background:#fffef9;border-bottom:1px solid #dde2d4}
#image-position{font:600 13px/1.5 ui-monospace,monospace;color:var(--accent);white-space:nowrap}
.image-dialog-header p{font-size:14px;line-height:1.6;margin:0}
.image-dialog-header button{min-width:70px;min-height:44px;padding:8px 14px;font-size:13px;border:1px solid #d4d9cb;background:white}
.image-scroll{height:calc(94dvh - 163px);max-height:none;width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:12px;background:#e8ebe2;overscroll-behavior:contain;scrollbar-gutter:stable both-edges}
.image-scroll img{width:auto;min-width:0;max-width:100%;height:auto;max-height:100%;object-fit:contain;flex-shrink:1;margin:auto;box-shadow:0 1px 8px #15210e15}
#image-dialog.is-zoomed .image-scroll{display:block;overflow:auto;padding:0;touch-action:pan-x pan-y}
#image-dialog.is-zoomed .image-scroll img{width:1280px;min-width:1280px;max-width:none;height:auto;max-height:none;margin:0}
.image-controls{display:flex;justify-content:center;gap:12px;padding:10px 18px 5px;background:#fffef9}
.image-controls button{min-width:110px;min-height:44px;font-size:13px;border:1px solid #cbd3c0;background:white;color:#3c4b35;padding:8px 15px;border-radius:5px}
.image-controls button[data-image-zoom]{background:#2f4437;color:#fff;border-color:#2f4437}
.image-controls button:disabled{opacity:.35;cursor:default}
.image-dialog-tip{font-size:12px;text-align:center;background:#fffef9;padding:3px 15px 10px;line-height:1.4}
.faq-count{font-size:12px}
#toast{font-size:14px}
@media(min-width:1500px){.layout{gap:60px}}
@media(max-width:1100px) and (min-width:761px){.layout{grid-template-columns:175px minmax(0,1fr);gap:30px;padding:0 25px}.intro{grid-template-columns:1fr;gap:24px}.hero-preview{display:grid;grid-template-columns:1fr 1.3fr;transform:none}.preview-bar{grid-column:1;border-bottom:0;align-self:start}.hero-preview img{grid-column:2;grid-row:1/3;height:180px;object-fit:contain}.preview-caption{grid-column:1;grid-row:2;border-top:0;background:white}.intro-meta{margin-bottom:18px}h1{font-size:43px}}
@media(max-width:760px){
 :root{scroll-padding-top:132px}
 .layout{padding:0 20px;display:block}
 .site-header{height:68px}
 .sidebar{position:sticky;top:68px;z-index:9;margin:0 -20px 18px;height:auto;background:#faf9f4f5;backdrop-filter:blur(14px);border:0;border-bottom:1px solid #dedfd4;border-radius:0;overflow:visible}
 .sidebar details>summary{display:flex;align-items:center;gap:12px;list-style:none;margin:0;min-height:48px;padding:11px 22px;cursor:pointer;font-size:13px;position:relative}
 .sidebar summary::-webkit-details-marker{display:none}
 .sidebar details>summary::after{content:'⌄';margin-left:auto;font-size:19px;color:var(--accent);line-height:1}
 .sidebar details[open]>summary::after{content:'⌃'}
 .toc-label{font-weight:650;white-space:nowrap}
 .toc-current{display:block;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:400}
 .sidebar details[open] nav{max-height:55dvh;overflow:auto;border-top:1px solid var(--line);padding:10px 15px 15px;grid-template-columns:1fr 1fr;background:#faf9f4}
 .sidebar nav a{font-size:13px;min-height:44px;display:flex;align-items:center;border-radius:4px}
 .breadcrumb{font-size:12px;padding:0 0 22px;gap:10px}
 .intro{display:flex;flex-direction:column;align-items:stretch;gap:25px;padding:0 0 29px}
 h1{font-size:34px;line-height:1.28}
 .intro .eyebrow{font-size:12px;margin-bottom:13px;letter-spacing:.1em}
 .intro-lead{font-size:15px;line-height:1.8;margin:17px 0}
 .intro-meta{font-size:12px;margin-bottom:18px;gap:9px}
 .intro-meta span+span{padding-left:9px}
 .intro-actions{gap:13px}
 .intro-actions .text-button{font-size:12px;min-height:44px;display:flex;align-items:center}
 .intro-actions .button{font-size:13px;padding:11px 15px}
 .hero-preview{transform:none;border-radius:7px}
 .preview-bar{font-size:12px;padding:10px 13px}
 .hero-preview>img{max-height:190px}
 .preview-caption{padding:12px 14px}
 .preview-caption strong{font-size:14px}
 .preview-caption small{font-size:12px}
 .preflight{padding:22px 19px}
 .preflight h2{font-size:21px}
 .preflight p,.preflight-note{font-size:14px!important}
 .resource-row{gap:12px}
 .resource-row small,.resource-row a{font-size:13px}
 .resource-row>a,.resource-row>.resource-links{margin-left:0;align-self:stretch}
 .resource-row>a{justify-content:space-between;padding:10px 14px}
 .resource-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}
 .resource-links a{justify-content:space-between;padding:10px 14px}
 .chapter{padding-top:37px}
 .chapter-heading h2{font-size:27px}
 .chapter-heading p{font-size:15px}
 .step h3{font-size:21px;gap:11px;line-height:1.5;align-items:flex-start}
 .step-number{width:32px;height:32px;flex:none;font-size:12px;margin-top:1px}
 .step+.step{padding-top:28px}
 .step p{font-size:15px;line-height:1.95}
 .shot{margin:22px -20px 27px;border-radius:0;border-left:0;border-right:0}
 .extra .shot{margin-left:-14px;margin-right:-14px}
 .shot figcaption{padding:13px 20px;font-size:13px;line-height:1.7}
 .shot-time{font-size:12px}
 .zoom-hint{font-size:12px;min-height:40px;bottom:8px;right:8px;padding:8px 12px}
 .note{font-size:14px;padding:15px 17px}
 .extra p{font-size:14px}
 .extra summary{font-size:14px}
 .copy-line button{min-height:44px}
 .support p{font-size:14px}
 .support button{min-height:44px;font-size:13px}
 .faq-item summary{font-size:16px;line-height:1.7}
 .faq-item>div{padding:13px 10px 3px;font-size:15px}
 .sources,.sources p{font-size:12px}
 footer,footer a,footer button{font-size:12px}
 #image-dialog{width:100vw;max-width:100vw;height:100dvh;max-height:100dvh;border-radius:0;margin:0}
 .image-dialog-header{min-height:100px;grid-template-columns:1fr auto;gap:5px 10px;padding:12px 15px}
 #image-position{font-size:13px;grid-column:1;grid-row:1}
 .image-dialog-header p{grid-column:1/-1;grid-row:2;font-size:13px;line-height:1.5}
 .image-dialog-header button{grid-column:2;grid-row:1;min-height:44px}
 .image-scroll{height:calc(100dvh - 200px);padding:7px}
 .image-scroll img{min-width:0;max-width:100%;max-height:100%;width:auto}
 .image-controls{gap:7px;padding:10px 10px 4px}
 .image-controls button{min-width:0;flex:1;font-size:13px;padding:8px 5px;min-height:44px}
 .image-dialog-tip{font-size:12px;padding:5px 12px 12px;line-height:1.6}
}
@media print{.hero-preview,.sidebar,.zoom-hint{display:none!important}.intro{display:block}.shot{margin-inline:0}.step+.step{padding-top:16px}.step-number{border:0}.step{break-inside:auto}}
/* Let long captions wrap without cutting off the viewer controls. */
#image-dialog[open]{display:flex;flex-direction:column}
#image-dialog .image-dialog-header,#image-dialog .image-controls,#image-dialog .image-dialog-tip{flex:none}
#image-dialog .image-scroll{flex:1;min-height:0;height:auto}

.eyebrow{font-size:12px}
@media(max-width:760px){.button.small{font-size:12px}}

/* Concise tutorial: retain operations and controls, remove editorial microcopy. */
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.intro{padding:52px 0 32px;min-height:365px}
.intro-actions{margin-top:30px}
.hero-preview .preview-caption{justify-content:space-between;padding:18px 20px;color:var(--accent)}
.hero-preview .preview-caption strong{font-size:18px}
.hero-preview .preview-caption>span{font-size:21px}
.resources{padding-top:12px}
.chapter-heading{margin-bottom:20px}
.chapter-heading h2{margin-bottom:0}
.zoom-hint{display:grid;place-items:center;width:40px;height:40px;padding:0;font-size:24px;line-height:1}
.end-cta{display:flex;align-items:center;gap:24px}
@media(max-width:760px){.intro{min-height:0;padding:14px 0 24px;gap:28px}.intro-actions{margin-top:22px}.hero-preview .preview-caption{padding:14px 17px}.hero-preview .preview-caption strong{font-size:17px}.resources{padding-top:12px}.end-cta{gap:18px}.end-cta .button{margin-right:0}.end-cta .text-button{margin-top:0}.image-controls{padding-bottom:14px}}

.opening-story{font-size:16px;line-height:1.95;color:var(--ink);margin:24px 0 0;max-width:32em}

/* 2026 article cover and a fixed, factual edit date. */
.intro{display:block;min-height:0;padding:30px 0 28px}
.intro h1{font-size:clamp(30px,3.15vw,44px);line-height:1.35;letter-spacing:-.035em}
.article-updated{font-size:14px;line-height:1.7;color:var(--muted);margin:0 0 16px}
.article-updated time{color:var(--ink);font-weight:550}
.opening-story{max-width:52em;margin:20px 0 0}
.article-cover{width:100%;height:auto;display:block;object-fit:contain;margin:26px 0 0;border:1px solid #d6d6cb;border-radius:8px;box-shadow:0 3px 12px #19230e0b}
.intro-actions{margin-top:24px}
@media(max-width:760px){.intro{padding:18px 0 24px}.intro h1{font-size:30px;line-height:1.4}.article-updated{font-size:13px;margin-bottom:14px}.opening-story{font-size:16px;line-height:1.85;margin-top:18px}.article-cover{margin-top:22px;border-radius:5px}.intro-actions{margin-top:20px}}

/* The cover is the first item in the article. */
.intro{padding-top:24px}.article-cover{margin:0 0 26px}.article-updated{margin-bottom:13px}
@media(max-width:760px){.intro{padding-top:0}.article-cover{margin:0 0 22px}}