:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#243148;background:#f7f8fb;font-synthesis:none;font-weight:400;line-height:1.6;font-size:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0}
button,a,input{-webkit-tap-highlight-color:transparent}
button,input{font:inherit}
button,a{touch-action:manipulation}
button{cursor:pointer}
button{color:inherit}
a{color:inherit;text-decoration:none}
button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid #e8a028;outline-offset:5px}
button:disabled{cursor:default}
svg.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;vertical-align:middle}
svg.small{width:15px;height:15px}
.icon-library{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{max-width:1440px;margin:auto;padding:24px 40px;display:flex;align-items:center;gap:28px;min-height:90px}
.brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:750;letter-spacing:-.7px;white-space:nowrap}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;background:#3064e8;color:white;border-radius:10px;transform:rotate(-7deg)}
.brand-mark .icon{width:25px;height:25px;stroke-width:1.5}
.brand-period{color:#3064e8}
.header-note{color:#8a909d;font-size:12px;border-left:1px solid #dce0e7;padding-left:25px}
.header-link{margin-left:auto;display:flex;align-items:center;gap:9px;font-size:12px;color:#54647c;transition:color .2s}
.header-link:hover{color:#3064e8}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:30px;max-width:1440px;margin:auto;padding:8px 40px 36px;align-items:start}
.demo{--accent:#3064e8;--accent-hover:#2454cd;--soft:#edf3ff;--pale:#f4f7ff;--hero:#e9f0ff;--ink:#203c73;min-width:0}
.demo[data-theme=rose]{--accent:#c14d6c;--accent-hover:#a53c59;--soft:#faedf1;--pale:#fdf5f7;--hero:#f8e8ee;--ink:#72354b}
.demo[data-theme=green]{--accent:#318467;--accent-hover:#24664e;--soft:#e9f4ee;--pale:#f3f9f5;--hero:#e5f1e9;--ink:#245541}
.demo-topline{display:flex;justify-content:space-between;align-items:center;margin:0 0 13px;color:#7b8798;font-size:11px}
.demo-topline>span:first-child{display:flex;align-items:center;gap:7px}
.live-dot{width:6px;height:6px;background:#6a9e87;border-radius:50%}
.preview-label{font-size:9px;letter-spacing:1.5px;color:#949dac}
.hero{position:relative;background:var(--hero);border-radius:12px;display:grid;grid-template-columns:1.05fr 1fr;min-height:350px;padding:37px 34px 33px;isolation:isolate;transition:background .25s}
.hero-copy{position:relative;z-index:2}
.hero-eyebrow{color:var(--accent);font-size:9px;letter-spacing:1.8px;display:flex;align-items:center;gap:7px;font-weight:650}
.tiny-star{font-size:18px;line-height:1}
.hero h1{color:var(--ink);font-size:clamp(32px,3.4vw,49px);font-weight:800;letter-spacing:-1.9px;line-height:1.38;margin:17px 0 16px;white-space:nowrap}
.highlight-word{position:relative;z-index:1}
.highlight-word>svg{position:absolute;bottom:-7px;left:-4px;width:108%;height:15px;fill:none;stroke:#ec9b80;stroke-width:4;stroke-linecap:round;z-index:-1}
.hero-description{font-size:12px;line-height:1.95;color:#697d9a;margin:0 0 21px}
.primary-link{display:inline-flex;align-items:center;gap:17px;background:var(--accent);border:1px solid transparent;color:#fff;padding:10px 16px;font-size:12px;font-weight:550;border-radius:5px;box-shadow:0 5px 10px #1e459416;transition:background .2s,transform .2s}
.primary-link:hover{background:var(--accent-hover);transform:translateY(-2px)}
.primary-link .icon{width:16px;height:16px}
.hero-footnote{display:block;font-size:9px;letter-spacing:.4px;color:#8b9cb5;margin-top:12px}
.hero-art{position:relative;min-width:0;margin:-13px -8px -10px 0}
.art-orbit{position:absolute;inset:0;width:100%;height:100%;fill:none;stroke:#98b3da;stroke-width:1.5;stroke-dasharray:5 6}
.photo-print{position:absolute;width:59%;padding:9px 9px 0;background:white;box-shadow:0 10px 24px #31487020}
.photo-print img{width:100%;height:168px;display:block;object-fit:cover}
.photo-print>span:not(.photo-tape){display:block;font-family:Georgia,serif;text-align:center;font-size:12px;color:#67727a;height:33px;padding-top:5px}
.photo-back{right:2%;top:8%;transform:rotate(11deg)}
.photo-front{left:8%;top:27%;transform:rotate(-9deg);z-index:1}
.photo-tape{position:absolute;left:28%;top:-11px;width:44%;height:24px;background:#f7d7b2cf;transform:rotate(3deg);clip-path:polygon(3% 0,100% 3%,96% 100%,0 96%)}
.weekend-stamp{position:absolute;right:-2%;bottom:1%;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;width:101px;height:101px;background:#f3b591;color:#664b3c;transform:rotate(10deg);border:1px dashed #a5795f;outline:5px solid #f3b591;border-radius:50%}
.weekend-stamp span{font-size:8px;letter-spacing:1.2px}
.weekend-stamp strong{font-size:20px;margin:2px 0;letter-spacing:1px}
.art-heart{position:absolute;left:6%;top:3%;width:46px;height:46px;fill:none;stroke:var(--accent);stroke-width:2.5;transform:rotate(-16deg)}
.art-star{position:absolute;color:var(--accent)}
.star-one{right:-4%;top:29%;font-size:37px;transform:rotate(12deg)}
.star-two{left:1%;bottom:1%;font-size:32px}
.ideas{margin-top:33px;scroll-margin-top:20px}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:17px;gap:10px}
.section-kicker{font-size:8px;letter-spacing:1.7px;color:#929cab;margin-bottom:4px}
.section-heading h2{font-size:20px;letter-spacing:-.6px;margin:0;font-weight:700}
.heading-dot{color:var(--accent);margin-left:2px}
.section-aside{font-size:10px;color:#949daa;padding-bottom:3px;white-space:nowrap}
.place-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}
.place-card{background:#fff;border:1px solid #e7eaf0;border-radius:9px;overflow:hidden;transition:transform .22s,box-shadow .22s,border-color .22s}
.place-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px #2431480a}
.place-card.is-picked{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}
.place-photo{position:relative;aspect-ratio:1.5;overflow:hidden;background:#e7e9ed}
.place-photo>img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.place-card:hover .place-photo>img{transform:scale(1.035)}
.place-card[data-place=coffee] .place-photo>img{object-position:center 49%}
.place-card[data-place=park] .place-photo>img{object-position:center 58%}
.photo-label{position:absolute;bottom:10px;left:12px;background:#ffffffed;padding:2px 8px;border-radius:3px;font-size:9px;color:#465467;box-shadow:0 2px 7px #00000008}
.favorite{position:absolute;top:10px;right:10px;display:grid;place-items:center;background:#fffffff0;border:0;border-radius:50%;width:29px;height:29px;color:#748092;transition:color .2s,transform .2s}
.favorite .icon{width:15px;height:15px}
.favorite:hover{transform:scale(1.1);color:#d9697c}
.favorite[aria-pressed=true]{color:#d26078}
.favorite[aria-pressed=true] .icon{fill:#d26078}
.place-body{padding:15px 14px 12px}
.place-category{display:flex;align-items:center;gap:5px;font-size:9px;color:var(--accent)}
.place-category .icon{width:13px;height:13px}
.place-category>span{margin-left:auto;font-size:9px;color:#99a2af}
.place-body h3{font-size:17px;margin:7px 0 7px;letter-spacing:-.4px}
.place-body p{font-size:11px;line-height:1.9;color:#818995;margin:0;min-height:43px}
.place-bottom{display:flex;align-items:center;justify-content:space-between;gap:4px;border-top:1px solid #eff1f5;margin-top:14px;padding-top:10px;color:#939dab;font-size:8px}
.place-bottom>span:first-child{display:flex;align-items:center;gap:3px;white-space:nowrap}
.place-bottom .icon{width:11px;height:11px}
.place-bottom>span:last-child{font-size:7px;letter-spacing:.5px;text-align:right}
.decision{margin-top:21px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 20px;background:var(--soft);border:1px solid color-mix(in srgb,var(--accent) 12%,transparent);border-radius:8px}
.decision-copy{display:flex;align-items:center;gap:12px;min-width:0}
.decision-icon{display:grid;place-items:center;width:37px;height:37px;border-radius:8px;background:#fff;color:var(--accent);flex-shrink:0;transform:rotate(-7deg)}
.decision-icon .icon{width:21px;height:21px}
.decision h2{font-size:13px;margin:0 0 2px;font-weight:650}
.decision p{font-size:10px;margin:0;color:#8390a5}
.random-button{display:flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap;padding:9px 13px;border:1px solid var(--accent);color:var(--accent);background:white;font-size:11px;border-radius:5px;transition:background .2s}
.random-button:hover{background:var(--pale)}
.random-button .icon{width:15px;height:15px}
.random-button.is-rolling .icon{animation:roll .55s linear infinite}
@keyframes roll{to{transform:rotate(360deg)}}
.itinerary{margin-top:23px;border:1px solid #e7eaf0;background:white;border-radius:8px;padding:19px 20px 21px}
.itinerary-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
.itinerary-heading h2{font-size:12px;margin:0;font-weight:650}
#favorite-count{display:flex;align-items:center;gap:5px;font-size:9px;color:#9a8692}
#favorite-count .icon{width:12px;height:12px}
.timeline{display:grid;grid-template-columns:repeat(3,1fr) .75fr;list-style:none;padding:0;margin:23px 0 0}
.timeline li{position:relative;display:flex;align-items:center;gap:9px;z-index:0}
.timeline li:not(:last-child):after{content:"";position:absolute;border-top:1px dashed #dbe3ed;left:104px;right:11px;top:18px;z-index:-1}
.timeline-icon{width:34px;height:34px;border-radius:50%;background:var(--pale);color:var(--accent);display:grid;place-items:center}
.timeline-icon .icon{width:17px;height:17px}
.timeline li>div{background:white;padding-right:5px}
.timeline time{display:block;font-size:10px;font-weight:650;line-height:1.3}
.timeline li>div>span{font-size:10px;color:#8b94a1}
.timeline-end{justify-content:center;color:#b68a8a;font-size:10px}
.timeline-end .icon{width:19px;height:19px;stroke:#cd9494}
.demo-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;color:#a4adba;font-size:9px;margin-top:25px}
.demo-footer>span:first-child{display:flex;align-items:center;gap:7px;font-size:7px;letter-spacing:1px}
.demo-footer .icon{width:10px;height:10px}
.lab{position:sticky;top:20px;max-height:calc(100dvh - 40px);overflow-y:auto;scrollbar-width:thin;margin-top:30px;border:1px solid #e3e7ef;border-radius:12px;background:white;padding:23px 22px 16px;box-shadow:0 4px 20px #23395603;scroll-margin-top:20px}
.lab-heading{display:flex;align-items:center;gap:10px}
.lab-icon{display:grid;place-items:center;width:37px;height:37px;color:#546681;background:#f0f3f8;border-radius:8px}
.lab-icon .icon{width:20px;height:20px}
.lab-eyebrow{font-size:7px;letter-spacing:1.4px;color:#9ba4b3;line-height:1.5}
.lab-heading h2{font-size:19px;letter-spacing:-.5px;margin:0}
.lab-status{margin-left:auto;font-size:9px;background:#f1f7f2;color:#609570;padding:2px 7px;border-radius:3px}
.lab-intro{font-size:11px;color:#8a93a1;line-height:1.9;margin:15px 0 19px}
.lesson{border-top:1px solid #edf0f5;padding:18px 0}
.lesson-top{display:flex;justify-content:space-between;align-items:center}
.language-badge{font-size:10px;font-weight:700;color:#c8794c;background:#fff0e8;padding:2px 7px;border-radius:3px;letter-spacing:.2px}
.lesson-metaphor{font-size:9px;color:#9a9faa}
.lesson h3{font-size:13px;letter-spacing:-.2px;margin:10px 0 5px}
.lesson>p{font-size:11px;color:#778291;line-height:1.95;margin:0 0 12px}
.wide-control{width:100%;display:flex;align-items:center;gap:8px;text-align:left;border:1px solid #e4e8ef;background:#fafbfd;border-radius:5px;padding:9px 10px;font-size:11px;transition:background .2s,border .2s}
.wide-control:hover{background:#f0f3f9;border-color:#c7d0e0}
.wide-control .icon{width:15px;height:15px;color:#76869c}
.control-indicator{margin-left:auto;width:9px;height:9px;border:1px solid #c1c9d6;border-radius:50%}
.wide-control[aria-pressed=true]{background:#edf3ff;border-color:#7d9bee;color:#3064e8}
.wide-control[aria-pressed=true] .control-indicator{background:#3064e8;border-color:#3064e8;box-shadow:0 0 0 3px #d9e5ff}
.inspect-note,.lesson-note{font-size:10px;color:#9098a5;margin:7px 0 0;line-height:1.7}
.css-lesson .language-badge{color:#7e68b5;background:#f2ecfc}
.theme-control{display:flex;align-items:center;justify-content:space-between;margin:13px 0;font-size:10px;color:#778293}
.swatches{display:flex;gap:9px;padding-right:3px}
.swatch{display:grid;place-items:center;width:22px;height:22px;border:0;border-radius:50%;padding:4px;color:white;outline:2px solid transparent;outline-offset:3px}
.swatch[aria-pressed=true]{outline-color:currentColor}
.swatch-blue{background:#3064e8;--swatch:#3064e8}
.swatch-rose{background:#c96a86;--swatch:#c96a86}
.swatch-green{background:#5c9578;--swatch:#5c9578}
.swatch[aria-pressed=true]{outline-color:var(--swatch)}
.swatch .icon{width:14px;height:14px;visibility:hidden;stroke-width:2.5}
.swatch[aria-pressed=true] .icon{visibility:visible}
.swatch:focus-visible{outline-color:#e8a028}
.text-icon{font-size:13px;color:#8290a4;font-family:Georgia,serif;line-height:1}
.js-lesson .language-badge{color:#a88724;background:#fbf4d9}
.js-event{display:flex;align-items:flex-start;gap:7px;padding:10px;background:#f6f8fb;border-radius:5px;color:#8894a6;font-size:9px;min-height:37px}
.event-dot{width:5px;height:5px;background:#a7b4c8;border-radius:50%;flex-shrink:0;margin-top:5px}
.js-event.has-event{color:#547968;background:#eff7f1}
.js-event.has-event .event-dot{background:#70a480}
.interaction-control{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;color:#7a8595;cursor:pointer;margin-top:13px;position:relative}
.interaction-control input{position:absolute;right:0;width:30px;height:18px;margin:0;opacity:0;cursor:pointer}
.switch{width:29px;height:17px;border-radius:12px;background:#c5ccd7;position:relative;pointer-events:none;transition:background .2s}
.switch:after{content:"";position:absolute;top:3px;left:3px;width:11px;height:11px;border-radius:50%;background:white;transition:transform .2s}
.interaction-control input:checked+.switch{background:#3064e8}
.interaction-control input:checked+.switch:after{transform:translateX(12px)}
.interaction-control input:focus-visible+.switch{outline:3px solid #e8a028;outline-offset:3px}
.lab-summary{display:flex;align-items:center;gap:10px;background:#f4f7fd;border:1px solid #e9eef8;border-radius:6px;padding:12px;margin-top:0}
.lab-summary>.icon{color:#748db4;width:22px;height:22px}
.lab-summary p{font-size:10px;line-height:1.9;color:#8c98ac;margin:0}
.lab-summary strong{font-size:11px;font-weight:550;color:#5c708f}
.reset-button{border:0;background:none;font-size:10px;display:flex;align-items:center;gap:6px;color:#919cab;margin:16px auto 0;padding:4px 10px}
.reset-button:hover{color:#3064e8}
.lab-footnote{text-align:center;font-size:8px;color:#b0b7c2;margin:6px 0 0}

/* Demo styles are isolated so the teaching controls survive every experiment. */
.demo.is-inspecting [data-inspect]{outline:1px dashed #d89157;outline-offset:3px;cursor:help}
.demo.is-inspecting [data-inspect]:hover,.demo.is-inspecting [data-inspect]:focus-visible{outline:2px solid #d4803d;outline-offset:3px}
.demo.is-inspecting [data-inspect=section]{outline-color:#96a8c1}
.demo.is-inspecting .place-card:hover{transform:none}
.demo.is-inspecting .place-card:hover .place-photo>img{transform:none}
.demo.is-inspecting .primary-link:hover{transform:none}

/* Revert only the example to browser defaults; keep images within the viewport. */
.demo.is-unstyled :where(*){all:revert;box-sizing:border-box}
.demo.is-unstyled{font-family:serif;color:#000;background:white;line-height:normal;padding:16px;border:1px solid #e1e4eb;font-size:16px}
.demo.is-unstyled :where(svg),.demo.is-unstyled .hero-art,.demo.is-unstyled .control-indicator{display:none}
.demo.is-unstyled img{display:block;width:220px;max-width:100%;height:auto}
.demo.is-unstyled .demo-topline{display:block;margin-bottom:16px}
.demo.is-unstyled .preview-label{display:none}
.demo.is-unstyled .favorite{display:block;margin:6px 0}
.demo.is-unstyled .favorite:after{content:"♡ 收藏"}
.demo.is-unstyled .favorite[aria-pressed=true]:after{content:"♥ 已收藏"}
.demo.is-unstyled .place-card{margin:24px 0}
.demo.is-unstyled .photo-label{display:block}
.demo.is-unstyled .place-category>span{margin-left:10px}
.demo.is-unstyled .place-bottom>span{margin-right:10px}
.demo.is-unstyled .hero-footnote{display:block;margin:12px 0}
.demo.is-unstyled .itinerary{margin-top:24px}
.demo.is-unstyled .timeline time{margin-right:12px}
.demo.is-unstyled .demo-footer>span{display:block;margin:12px 0}
.demo.is-unstyled .place-card.is-picked{outline:2px solid #3064e8}
.demo.is-unstyled [data-inspect]:focus-visible{outline:3px solid #e8a028}
.demo.is-unstyled.is-inspecting [data-inspect]{outline:1px dashed #d89157;outline-offset:3px;cursor:help}
.demo.is-unstyled.is-inspecting [data-inspect]:hover{outline:2px solid #d4803d}

.element-dialog{width:min(440px,calc(100% - 36px));max-height:calc(100dvh - 40px);overflow:auto;border:1px solid #e2e7ee;border-radius:14px;padding:25px;color:#243148;box-shadow:0 20px 100px #17284b30}
.element-dialog::backdrop{background:#1a2b455c;backdrop-filter:blur(4px)}
.dialog-topline{display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:.5px;color:#939ead;margin-bottom:18px}
.close-dialog{background:none;border:0;font-size:26px;line-height:1;width:28px;height:28px;color:#8090a4}
.element-tag{display:inline-block;padding:3px 9px;border-radius:4px;background:#fff0e8;font-size:12px;color:#bd7445;font-family:ui-monospace,monospace}
.element-dialog h2{font-size:23px;margin:12px 0 8px}
.element-dialog>p{font-size:13px;color:#7a8799;line-height:1.9;margin:0}
.element-dialog pre{padding:16px;background:#f5f7fb;border:1px solid #e8edf5;border-radius:7px;white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.9;color:#596f99;margin:20px 0}
.element-roles p{display:flex;gap:13px;font-size:12px;align-items:baseline;line-height:1.8;margin:12px 0;color:#738095}
.element-roles p>span:first-child{font-size:9px;font-weight:650;width:36px;flex-shrink:0}
.role-html{color:#c8794c}.role-css{color:#8e74ba}.role-js{color:#a88724}
.dialog-done{display:flex;align-items:center;gap:8px;justify-content:center;padding:10px 15px;margin-top:23px;background:#3064e8;color:white;border:0;border-radius:5px;font-size:12px;width:100%}

@media(min-width:1550px){.site-header{padding-top:30px;padding-bottom:30px}.workspace{padding-top:12px}.hero{min-height:374px;padding:40px}.hero h1{font-size:52px}.photo-print img{height:180px}.lab{padding:25px}.place-photo{aspect-ratio:1.48}.place-body p{font-size:12px}}
@media(max-width:1180px){.site-header{padding:21px 26px}.workspace{padding:8px 26px 30px;gap:23px;grid-template-columns:minmax(0,1fr) 300px}.lab{padding:20px 18px 15px}.hero{padding:30px 26px;min-height:325px}.hero h1{font-size:38px}.photo-print img{height:142px}.hero-art{margin:0 -5px 0 -15px}.photo-front{left:4%;top:31%}.photo-back{right:0;top:13%}.weekend-stamp{width:78px;height:78px;bottom:7%;right:-1%}.weekend-stamp strong{font-size:16px}.weekend-stamp span{font-size:6px}.art-heart{width:38px;height:38px}.star-one{font-size:30px}.place-grid{gap:11px}.place-body{padding:12px 11px 10px}.place-category{font-size:8px;gap:3px}.place-category>span{font-size:8px}.place-body h3{font-size:16px}.place-bottom>span:last-child{display:none}.section-heading h2{font-size:18px}.section-aside{font-size:9px}.decision{padding:16px 14px;gap:10px}.decision-copy{gap:9px}.decision h2{font-size:12px}.decision-icon{width:29px;height:29px}.random-button{font-size:10px;padding:9px}.timeline{grid-template-columns:repeat(3,1fr)}.timeline-end{display:none!important}.timeline li:nth-child(3):after{display:none}.demo-footer>span:first-child{font-size:6px;letter-spacing:.5px}.demo-footer{font-size:8px}}
@media(max-width:980px){.workspace{grid-template-columns:minmax(0,1fr);max-width:820px}.site-header{max-width:820px}.header-note{display:none}.lab{position:static;max-height:none;overflow:visible;margin-top:6px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 20px;padding:23px}.lab-heading,.lab-intro,.lab-summary,.reset-button,.lab-footnote{grid-column:1/-1}.lab-intro{margin:12px 0 18px}.lab-intro br{display:none}.lab-summary{margin-top:8px}.lesson>p br{display:none}.hero{min-height:350px;padding:35px}.hero h1{font-size:46px}.photo-print img{height:163px}.hero-art{margin-left:0}.weekend-stamp{width:92px;height:92px;bottom:4%}.weekend-stamp strong{font-size:19px}.weekend-stamp span{font-size:7px}.section-heading h2{font-size:21px}.place-body{padding:15px}.place-body p{font-size:12px;min-height:46px}.place-category{font-size:9px}.place-bottom>span:last-child{display:block}.timeline{grid-template-columns:repeat(3,1fr) .75fr}.timeline-end{display:flex!important}.timeline li:nth-child(3):after{display:block}.decision h2{font-size:14px}.decision p{font-size:11px}.random-button{font-size:12px}.decision{padding:20px}.decision-icon{width:37px;height:37px}.demo-footer{font-size:9px}.demo-footer>span:first-child{font-size:7px}}
@media(max-width:620px){.site-header{padding:19px 20px;min-height:74px;gap:10px}.brand{font-size:18px;gap:8px}.brand-mark{width:30px;height:30px;border-radius:8px}.brand-mark .icon{width:21px;height:21px}.header-link{font-size:0;gap:0;border:1px solid #dce3ee;border-radius:6px;padding:7px}.header-link>.icon:first-child{width:18px;height:18px}.header-link>.small{display:none}.workspace{padding:6px 18px 25px;gap:24px}.demo-topline{font-size:9px;margin-bottom:10px}.preview-label{font-size:7px}.hero{padding:28px 24px 18px;display:block;min-height:0;overflow:hidden}.hero-copy{width:100%}.hero-eyebrow{font-size:8px}.hero h1{font-size:clamp(34px,10.6vw,42px);line-height:1.35;margin-top:17px}.hero-description{font-size:12px}.hero-art{height:240px;width:min(270px,100%);margin:-12px -5px 0 auto}.photo-print{width:53%}.photo-print img{height:136px}.photo-front{left:15%;top:24%}.photo-back{right:0;top:6%}.weekend-stamp{width:76px;height:76px;bottom:4%;right:0}.weekend-stamp strong{font-size:16px}.weekend-stamp span{font-size:6px}.art-orbit{width:280px;left:0}.art-heart{left:4%;top:7%;width:37px;height:37px}.star-one{right:-6%;top:25%;font-size:27px}.star-two{left:10%;bottom:5%;font-size:27px}.hero-footnote{font-size:9px}.section-heading{margin-bottom:15px}.section-heading h2{font-size:20px}.section-kicker{font-size:7px;letter-spacing:1.3px}.section-aside{display:none}.ideas{margin-top:29px}.place-grid{grid-template-columns:1fr;gap:17px}.place-photo{aspect-ratio:1.85}.place-body{padding:17px 18px 14px}.place-category{font-size:10px}.place-category>span{font-size:10px}.place-body h3{font-size:20px;margin-top:7px}.place-body p{font-size:12px;min-height:0}.place-bottom{font-size:9px;margin-top:15px;padding-top:12px}.place-bottom>span:last-child{font-size:8px}.favorite{width:35px;height:35px;top:13px;right:13px}.favorite .icon{width:18px;height:18px}.photo-label{left:17px;bottom:13px;font-size:10px;padding:3px 9px}.decision{padding:19px 17px;flex-direction:column;align-items:stretch;gap:15px}.decision-copy{gap:12px}.decision h2{font-size:13px}.decision p{font-size:10px}.random-button{padding:11px;font-size:12px}.itinerary{padding:18px 16px}.itinerary-heading h2{font-size:11px}.itinerary-heading{gap:5px}#favorite-count{font-size:8px;gap:3px}.timeline{grid-template-columns:repeat(3,1fr);margin-top:19px}.timeline-end{display:none!important}.timeline li{gap:7px}.timeline-icon{width:28px;height:28px}.timeline-icon .icon{width:14px;height:14px}.timeline time{font-size:9px}.timeline li>div>span{font-size:9px}.timeline li:not(:last-child):after{left:86px;right:7px;top:14px}.timeline li:nth-child(3):after{display:none}.demo-footer{flex-direction:column;gap:5px;margin-top:23px;font-size:8px}.lab{display:block;padding:24px;margin-top:0}.lab-heading h2{font-size:22px}.lab-eyebrow{font-size:8px}.lab-intro{font-size:12px}.lesson{padding:21px 0}.lesson h3{font-size:15px}.lesson>p{font-size:12px}.lesson>p br{display:block}.lesson-metaphor{font-size:10px}.language-badge{font-size:11px}.wide-control{font-size:12px;padding:12px}.inspect-note,.lesson-note{font-size:10px}.theme-control{font-size:12px;margin:17px 0}.swatch{width:25px;height:25px}.swatches{gap:12px}.js-event{font-size:11px;padding:12px}.interaction-control{font-size:12px;margin-top:17px}.lab-summary{padding:15px}.lab-summary p{font-size:11px}.lab-summary strong{font-size:12px}.reset-button{font-size:12px;margin-top:20px}.lab-footnote{font-size:9px}.lab-status{font-size:10px}.element-dialog{padding:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

.chapter-nav{max-width:1440px;margin:0 auto 12px;padding:0 40px;display:flex;gap:15px;align-items:center;font-size:11px;color:#718099;flex-wrap:wrap}
.chapter-nav a{padding:6px 0;border-bottom:1px solid transparent}
.chapter-nav a:hover{color:#3064e8;border-color:#3064e8}
.chapter-nav>span{color:#b0bbcc}
.web-primer{max-width:1360px;margin:4px auto 22px;padding:21px 26px;border:1px solid #e0e7f2;border-radius:9px;background:white;display:grid;grid-template-columns:1.35fr 1fr;gap:12px 32px;scroll-margin-top:20px}
.web-primer h2{font-size:21px;margin:5px 0 8px;letter-spacing:-.5px}
.web-primer p{font-size:12px;line-height:1.9;color:#8290a4;margin:0}
.web-primer p strong{font-weight:550;color:#526c91}
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.primer-recipe>span{display:block;color:#8290a4;font-size:12px}
.primer-recipe b{display:block;color:#5876a6;font-size:14px;font-weight:600;margin-bottom:6px}
.web-primer .primer-prompt{grid-column:1/-1;border-top:1px solid #edf0f6;padding-top:12px;font-size:11px;color:#899ab3}
.plain-flow{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:22px 0}
.plain-flow li{padding:17px 20px;border-radius:6px;background:#f3f6fc;position:relative}
.plain-flow li:not(:last-child):after{content:'→';position:absolute;right:-13px;top:27px;font-size:11px;color:#95a8c4}
.plain-flow b{display:block;font-size:14px;font-weight:550;color:#526c90;margin-bottom:7px}
.plain-flow span{font-size:12px;color:#8797ad;line-height:1.8}
.concept-bridge{font-size:13px;color:#7d8da3;line-height:1.95;margin:-9px 0 24px;max-width:1000px}
.concept-bridge strong{font-weight:550;color:#526d93}
.provider-note{padding:17px 20px;margin-top:20px;border-left:3px solid #85a6dd;background:#f7f9fd;border-radius:0 6px 6px 0}
.provider-note>strong{font-size:14px;font-weight:600;color:#566f94}
.provider-note p{font-size:13px;line-height:1.9;margin:7px 0 0;color:#8291a8}
.provider-note b{font-weight:550;color:#617b9f}
.lesson-takeaway{display:flex;align-items:baseline;gap:13px;margin-top:23px;padding-top:17px;border-top:1px solid #e9edf4;flex-wrap:wrap;font-size:12px}
.lesson-takeaway>strong{color:#7f95b7;font-size:10px;font-weight:500}
.lesson-takeaway>span{color:#54749e}
.lesson-takeaway>a{margin-left:auto;color:#7f96b8;font-size:11px}
.lesson-takeaway>a:hover{color:#3064e8}
.lesson-recap{padding:28px 32px;border-radius:10px;background:#eaf1fe;scroll-margin-top:20px}
.lesson-recap h2{font-size:22px;letter-spacing:-.5px;margin:0 0 21px;color:#3c5d90}
.lesson-recap ol{padding:0;list-style:none;margin:0;display:grid;gap:11px}
.lesson-recap li{display:flex;gap:25px;font-size:13px;line-height:1.8}
.lesson-recap strong{min-width:185px;font-weight:550;color:#5f7fae}
.lesson-recap span{color:#8197b9}
.lesson-recap>a{display:inline-block;color:#6485b8;font-size:12px;border-top:1px solid #d7e3f8;margin-top:22px;padding-top:15px;width:100%}
.code-details{margin:17px 0;color:#8092ac;font-size:11px}
.code-details summary{cursor:pointer}
.code-details pre{padding:14px;background:#f5f7fb;border:1px solid #e8edf5;border-radius:7px;white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.9;color:#596f99;margin:12px 0}
@media(max-width:1439px){.web-primer{margin-left:40px;margin-right:40px}}
@media(max-width:1180px){.web-primer{margin-left:26px;margin-right:26px}}
@media(max-width:980px){.web-primer{max-width:768px;margin-left:auto;margin-right:auto;grid-template-columns:1fr}.primer-recipe{justify-content:flex-start;gap:40px}.lesson-recap li{gap:18px}.lesson-takeaway>a{margin-left:0}}
@media(max-width:820px){.web-primer{margin-left:26px;margin-right:26px}}
@media(max-width:620px){.web-primer{margin:4px 18px 18px;padding:19px;gap:16px}.web-primer h2{font-size:19px;line-height:1.5}.web-primer p{font-size:12px}.primer-recipe{gap:12px;justify-content:space-between}.primer-recipe b{font-size:12px}.primer-recipe>span{font-size:10px}.plain-flow{grid-template-columns:1fr;gap:13px}.plain-flow li{padding:15px}.plain-flow li:not(:last-child):after{content:'↓';top:auto;bottom:-17px;right:50%}.plain-flow b{font-size:13px}.plain-flow span{font-size:11px}.concept-bridge{font-size:12px;margin-top:-5px}.provider-note{padding:13px 15px}.provider-note>strong{font-size:13px}.provider-note p{font-size:12px}.lesson-takeaway{display:block;line-height:1.8}.lesson-takeaway>strong{display:block;margin-bottom:4px}.lesson-takeaway>a{display:block;margin-top:10px;font-size:11px}.lesson-recap{padding:23px 20px}.lesson-recap h2{font-size:20px;line-height:1.6}.lesson-recap li{display:block;font-size:12px}.lesson-recap li+li{margin-top:5px}.lesson-recap strong{display:block;margin-bottom:3px}.lesson-recap>a{font-size:11px}}
.learning{max-width:1440px;padding:30px 40px 50px;margin:auto}
.learning-intro{display:flex;justify-content:space-between;align-items:end;gap:25px;margin:10px 0 28px;padding-top:28px;border-top:1px solid #dfe5ef}
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.learning-intro h2{font-size:35px;letter-spacing:-1px;margin:7px 0 0}
.learning-intro h2>span{color:#3064e8}
.learning-intro>p{margin:0 0 3px;font-size:13px;color:#8390a4;line-height:1.9}
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.guide-heading{display:flex;gap:15px;align-items:center}
.guide-symbol{display:grid;place-items:center;width:49px;height:49px;flex-shrink:0;background:#edf3ff;color:#3064e8;border-radius:12px;font-size:29px}
.green-symbol{background:#eaf4ee;color:#418063}
.purple-symbol{background:#f1ecfa;color:#8360b0}
.guide-heading h2{font-size:23px;line-height:1.5;margin:3px 0 0;letter-spacing:-.5px}
.guide-lead{font-size:14px;line-height:1.95;color:#78869b;margin:20px 0 24px;max-width:1030px}
.guide-lead strong{font-weight:550;color:#445a78}
.hosting-demo{border:1px solid #e2e9f5;background:#f7f9fe;border-radius:9px;overflow:hidden}
.demo-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:15px 20px;border-bottom:1px solid #e7edf7;font-size:12px;color:#8693a9}
.segmented{display:flex;background:#eaf0f9;border-radius:5px;padding:3px;gap:3px}
.segmented button{border:0;background:transparent;font-size:12px;color:#7888a2;padding:7px 14px;border-radius:3px}
.segmented button[aria-pressed=true]{background:white;color:#3064e8;box-shadow:0 1px 5px #263d5e0d}
.visit-route{display:grid;grid-template-columns:1fr 125px 1.25fr 1.6fr;align-items:center;gap:22px;padding:30px 24px}
.route-node{text-align:center;display:flex;align-items:center;flex-direction:column;gap:4px}
.route-emoji{font-size:35px;line-height:1.5}
.route-node strong{font-size:14px;font-weight:600}
.route-node>span:last-child{font-size:11px;color:#8c98aa}
.route-connection{text-align:center;color:#8399b9;font-size:10px}
.route-arrow{display:block;font-size:35px;line-height:1.1;color:#9ab5df}
.route-result{border-left:1px solid #dae3f3;padding-left:24px}
.route-result strong{font-size:14px;color:#476386}
.route-result p{font-size:12px;line-height:1.9;color:#7c8ca3;margin:8px 0 0}
.hosting-outcome{padding:12px 20px;background:#edf2fb;color:#6d819f;font-size:12px;line-height:1.8}
.hosting-demo.is-cloud .route-arrow{color:#4b9579}
.hosting-demo.is-cloud .hosting-outcome{background:#eaf5ef;color:#4e7b65}
.fact-pair{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:24px 0}
.fact-pair strong{font-size:14px;font-weight:600}
.fact-pair p{font-size:13px;line-height:1.9;color:#8290a4;margin:7px 0 0}
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.guide-callout>.icon{margin-top:4px;color:#6488c5}
.guide-callout p{font-size:13px;line-height:1.9;color:#7084a5;margin:0;overflow-wrap:anywhere}
.guide-callout strong{font-weight:600;color:#47658e}
.plain-details{margin-top:18px;font-size:12px;color:#8796a9}
.plain-details summary{cursor:pointer;width:fit-content;color:#617996;padding:5px 0}
.plain-details p{line-height:1.9;margin:9px 0 0;padding:0 0 0 14px;max-width:1000px}
.roles-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.role-card{border:1px solid #e0e8f4;border-top:3px solid #91b0e6;border-radius:7px;padding:23px;background:#fcfdff}
.role-card-label{font-size:11px;color:#7694c4}
.role-card h3{font-size:20px;letter-spacing:-.5px;margin:12px 0 9px}
.role-card>p{font-size:13px;line-height:1.9;color:#8290a3;margin:0;min-height:50px}
.role-example{padding:14px 0;margin-top:14px;border-top:1px solid #e8edf5;font-size:12px;color:#8192aa;line-height:1.9}
.role-example strong{font-weight:550;color:#597395}
.role-technology{font-size:10px;color:#98a4b7}
.backend-card{border-top-color:#88b59d;background:#fbfefc}
.backend-card .role-card-label{color:#659678}
.database-card{border-top-color:#b49bd3;background:#fefcff}
.database-card .role-card-label{color:#9a7bbd}
.save-demo{display:grid;grid-template-columns:1fr auto;gap:0 25px;margin:25px 0;padding:25px;background:#f8fafc;border:1px solid #e7ecf3;border-radius:8px}
.simulation-label{font-size:10px;color:#a18362;background:#faf0df;padding:3px 7px;border-radius:3px}
.save-demo h3{font-size:16px;margin:11px 0 6px}
.save-demo>div>p{font-size:12px;color:#8b98aa;margin:0;line-height:1.9}
#simulate-save{align-self:center;display:flex;align-items:center;justify-content:center;gap:9px;background:#3064e8;color:white;border:0;border-radius:5px;padding:11px 15px;font-size:12px}
#simulate-save:hover{background:#2454cd}
#simulate-save:disabled{opacity:.65}
.save-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;padding:0;margin:22px 0 0;gap:15px;grid-column:1/-1}
.save-steps li{padding:15px;border:1px solid #e3e9f3;border-radius:6px;background:white;position:relative;transition:background .2s,border-color .2s}
.save-steps li:not(:last-child):after{content:'→';position:absolute;right:-14px;top:26px;color:#9baeca;z-index:1;font-size:12px}
.save-steps b{display:block;font-size:13px;font-weight:550;margin-bottom:4px;color:#627691}
.save-steps span{font-size:11px;color:#8b9aaf}
.save-steps .is-active{background:#edf4ff;border-color:#85a6e2}
.save-steps .is-active b{color:#3064e8}
.save-steps .is-complete{background:#f0f7f2;border-color:#c4decd}
.save-explanation{grid-column:1/-1;min-height:22px;margin:14px 0 0;font-size:12px;color:#7d8fa8;line-height:1.8}
.warm-callout{background:#fff6ec}
.warm-callout .icon{color:#bc9770}
.warm-callout p{color:#a08871}
.warm-callout strong{color:#937455}
.scenario-picker{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.scenario-picker>span{font-size:12px;color:#8996a9;margin-right:5px}
.scenario-picker button{border:1px solid #e1e7f0;border-radius:5px;background:#fff;padding:8px 12px;font-size:12px;color:#7c8da7}
.scenario-picker button[aria-pressed=true]{background:#edf3ff;color:#3064e8;border-color:#8eacf0}
.architecture-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.architecture-card{position:relative;border:1px solid #e3e8f0;border-radius:8px;padding:23px 23px 46px;transition:background .2s,border-color .2s}
.architecture-card.is-recommended{border-color:#8facf0;background:#f6f9ff;box-shadow:inset 0 0 0 1px #8facf0}
.architecture-label{font-size:11px;color:#7e8ea6}
.architecture-card h3{font-size:20px;margin:9px 0 17px;letter-spacing:-.4px}
.mini-diagram{display:flex;align-items:center;justify-content:center;gap:10px;min-height:63px;background:#f0f4fa;border-radius:5px;padding:10px;margin-bottom:17px;font-size:11px;color:#7184a2}
.mini-diagram span{border:1px solid #d9e2ef;border-radius:4px;background:white;padding:6px 12px;text-align:center}
.joined-diagram{border:1px dashed #acbcce;background:#eef4f0}
.joined-diagram span{border:0;background:transparent;padding:6px 9px;color:#65836e}
.joined-diagram span+span{border-left:1px solid #c7d9ca;border-radius:0}
.split-diagram{background:#f5f0fb;gap:6px}
.split-diagram span{padding:6px 8px;border-color:#e4daef;color:#957ab7}
.split-diagram b{font-size:9px;color:#a98bbc;white-space:nowrap;font-weight:400}
.architecture-card>p{font-size:13px;line-height:1.9;color:#7a8ba2;margin:0 0 14px;min-height:50px}
.architecture-card ul{margin:0;padding-left:17px;font-size:12px;color:#8e9aae;line-height:1.9}
.architecture-card li+li{margin-top:5px}
.recommend-label{position:absolute;bottom:17px;left:23px;font-size:10px;color:#3064e8}
.scenario-answer{padding:18px 21px;margin-top:19px;background:#edf3ff;border-radius:7px;color:#5c78a3}
.scenario-answer strong{font-size:14px;font-weight:600}
.scenario-answer p{font-size:13px;line-height:1.9;margin:6px 0 0;color:#7890b1}
.architecture-footnote{font-size:11px;line-height:1.9;color:#97a2b3;margin:18px 0 0}
.learning-finish{display:flex;gap:15px;align-items:center;padding:8px 5px 0;color:#738aab}
.learning-finish>.icon{color:#c58894;width:26px;height:26px}
.learning-finish strong{font-size:15px;font-weight:550}
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