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@media(max-width:720px){.sidebar{padding:18px}.brand{font-size:16px}.sidebar>.muted{display:none}.lesson-link{min-width:175px}.lesson-link small{font-size:11px}main{padding:18px 14px}header{padding:12px 16px}.reading-page,#practice,#help,#summary{border-radius:16px;padding:23px 19px}.page-picker{padding:12px;gap:8px}.page-picker label{font-size:12px}.page-picker select{font-size:14px;flex:1;min-width:0}.lesson-bar{font-size:12px}.lesson-bar button{font-size:12px;padding:8px 10px}.welcome-banner{padding:28px 22px}.welcome-banner h1{font-size:36px}#welcome>.big-idea,#welcome>h2,#welcome>h3,#welcome>p,#welcome>.flow{margin-left:22px;margin-right:22px}.learning-trail span{gap:5px}.learning-trail b{display:none}.flow{flex-wrap:wrap}.flow div{min-width:90px}.reading-page p,.reading-page li{font-size:17px}.pager{padding-right:16px;padding-bottom:65px}.pager span{font-size:11px}.project-view .reading-page h1{font-size:34px}.project-view .welcome-banner h1{font-size:36px}.project-view .welcome-banner{padding:28px 22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.lesson-link{transition:none}}@media print{body{background:white}.reading-page,#practice,#help,#summary{box-shadow:none;border:0}.welcome-banner{background:#fff;color:#173a32}.welcome-banner h1{color:#173a32}.welcome-actions,.code-illustration{display:none}}
.stdin-panel{font-size:15px}.stdin-panel>summary{font-size:15px;color:var(--green)}.stdin-panel #input-guide{font-size:15px;line-height:1.8;margin:14px 0}.stdin-panel #stdin-label{font-weight:700}.stdin-panel #stdin{min-height:76px;font-size:18px}.stdin-panel #input-warning{font-size:14px;border-left-color:#9c7836;background:#faf4de}.stdin-panel #input-behavior{font-size:14px;color:var(--muted)}.stdin-panel>details{font-size:13px;margin-top:12px}.project-view .stdin-panel #input-guide,.project-view .stdin-panel #input-behavior,.project-view .stdin-panel #input-warning{font-size:19px}
/* Lesson 2 uses the same teaching layout with independent code drafts. */
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/* Shared textbook for external Python lessons. */
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.ai-workshop>h2{font-size:32px;line-height:1.4}.ai-step-picker{background:#e5efd9;border:1px solid #c5d7b6;border-radius:14px;padding:16px 20px;display:flex;align-items:center;gap:18px;margin:26px 0}.ai-step-picker label{font-weight:700!important;margin:0!important}.ai-step-picker select{flex:1;min-width:0;padding:12px;border:1px solid #bbcfb3;border-radius:8px;background:white;font:inherit}.ai-step-picker:focus-within{outline:2px solid #7aa889}.ai-step-picker{scroll-margin-top:20px}.ai-workshop h3{font-size:28px;line-height:1.45;margin:20px 0}.ai-workshop h4{font-size:20px;margin-bottom:12px}.ai-workshop textarea{display:block;width:100%;font:18px/1.8 'Malgun Gothic',sans-serif;padding:18px;border:1px solid #aec8ad;border-radius:12px;margin:12px 0;background:#fcfdf9}.ai-step-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 0;border-top:1px solid #d9e4d5;margin-top:28px}.ai-fallback,.ai-verification{margin-top:24px;padding:18px;border:1px solid #d4dfce;border-radius:12px;background:#f7f9f2}.ai-fallback>summary,.ai-verification>summary{cursor:pointer;font-weight:700}.ai-fallback .art-workshop{border:0;padding-top:0}.ai-reasons{width:100%;border-collapse:collapse;margin-top:20px}.ai-reasons th,.ai-reasons td{border:1px solid #d1dfcb;padding:14px;text-align:left;font-size:17px;line-height:1.6}.ai-reasons th{background:#eaf2df}.ai-file-tool{padding:22px;background:#edf4e3;border-radius:16px}.ai-file-tool input{display:block;max-width:100%;margin:15px 0}.ai-file-tool canvas{display:block;max-width:100%;height:auto;background:repeating-conic-gradient(#d8e1d4 0% 25%,white 0% 50%) 50% / 20px 20px;border:1px solid #b9ccb4;margin:18px 0}.ai-folder{white-space:pre-wrap;background:#f1f5e9;padding:18px;border-radius:12px;font:16px/1.8 Consolas,monospace}.ai-service-link{display:inline-block;padding:12px 20px;border-radius:10px;background:#245f43;color:white;text-decoration:none}.project-view .ai-workshop textarea,.project-view .ai-reasons td{font-size:22px}@media(max-width:720px){.ai-workshop>h2{font-size:26px}.ai-workshop h3{font-size:24px}.ai-step-picker{display:block;padding:14px}.ai-step-picker select{width:100%;margin-top:10px}.ai-reasons th,.ai-reasons td{padding:10px;font-size:15px}.ai-workshop textarea{font-size:16px}.ai-step-nav{flex-wrap:wrap}}
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.source-mode{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:0 0 22px;padding:16px;background:#e4eee7;border:1px solid #c3d7c9;border-radius:16px}
.source-mode a{padding:10px 16px;border-radius:10px;color:#264d3a;background:white;font-weight:700;text-decoration:none}.source-mode a[aria-current]{background:#396347;color:white}.source-mode span{font-size:13px;line-height:1.6;flex-basis:100%}.source-reading{background:white;padding:clamp(18px,3vw,38px);border:1px solid #d7e3dc;border-radius:20px}.source-reading h1{font-size:clamp(26px,3vw,38px);margin:0 0 10px}.source-caption{font-size:14px;color:#556a5f}.source-image-button{display:block;width:100%;padding:0;overflow:hidden;background:#f1f6f2;border-radius:12px;text-align:center;cursor:zoom-in}.source-image-button img{width:100%;height:auto;display:block}.source-image-button span{display:block;padding:10px;font-size:13px}.source-explain{margin:24px 0;padding:22px;background:#f4f8f4;border-radius:14px;line-height:1.9}.source-explain h2{font-size:23px;margin:10px 0}.source-explain p{max-width:76ch}.source-explain pre{overflow:auto;white-space:pre;font-size:16px;line-height:1.65;background:white;padding:18px}.source-correction{border-left:4px solid #6c8b53;background:#edf4e8;padding:16px;line-height:1.8}.source-zoom .source-image-button{overflow:auto;cursor:zoom-out}.source-zoom .source-image-button img{width:1600px;max-width:none}.source-mode[hidden],#source-reader[hidden]{display:none}.source-reading .file-buttons{display:flex;gap:10px;flex-wrap:wrap}

.guided-task,.guided-submit{background:#eef4e6;border:1px solid #d9e5d6;border-radius:18px;padding:24px;margin:16px 0 24px}.guided-task h2{margin-top:0}.inline-original{margin-top:28px;border:1px solid #d9e5d6;border-radius:14px;padding:18px;background:#f8faf6}.inline-original summary{cursor:pointer;font-weight:700}.inline-original img{width:100%;height:auto;display:block}.inline-original article{margin:24px 0}.inline-original h3{margin-bottom:8px}#page-next{white-space:normal}#lesson-restart{background:#e8f0df}#practice [hidden]{display:none!important}

html{scroll-behavior:auto}
.lesson-visual{margin:26px 0;padding:22px;background:#f1f5e9;border-radius:16px}.lesson-visual figure{margin:16px 0 0}.lesson-visual img{display:block;width:100%;height:auto;border-radius:10px}.lesson-visual figcaption{font-size:13px;color:#52665c;margin-top:10px}
.word-story{margin:24px 0;padding:22px;background:#f7f5e9;border-left:4px solid #759052;border-radius:12px}.word-story h2{margin-top:0}.word-story pre{background:white;padding:16px;overflow:auto;white-space:pre-wrap}.word-story details{font-size:13px}
/* The guided welcome uses the same readable inset as the other student pages. */
#welcome.reading-page{padding:36px}
#welcome.reading-page>*{margin-left:0;margin-right:0}
@media(max-width:600px){#welcome.reading-page{padding:23px 19px}}