:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#17202a;background:#f5f6f8;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button{font:inherit}button:disabled{opacity:.5;cursor:not-allowed}code{background:#eef1f4;padding:.1rem .3rem;border-radius:.25rem}.page{min-height:100vh;padding:42px 20px 80px}.shell{width:min(980px,100%);margin:0 auto}.hero{display:flex;align-items:flex-start;justify-content:space-between;gap:28px;margin-bottom:26px}.eyebrow{margin:0 0 10px;text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:750;color:#697586}h1{margin:0;font-size:clamp(34px,6vw,56px);letter-spacing:-.04em;line-height:1.02}.lead{max-width:730px;color:#5f6b78;line-height:1.65;margin:16px 0 0}.version{white-space:nowrap;border:1px solid #d9dee5;background:#fff;padding:8px 11px;border-radius:999px;font-size:12px;color:#5f6b78}.card{background:#fff;border:1px solid #dde2e8;border-radius:14px;box-shadow:0 2px 8px #1220330a}.uploader{padding:28px;text-align:center}.primary{border:0;border-radius:9px;background:#17202a;color:#fff;padding:12px 18px;font-weight:700;cursor:pointer}.primary:hover{opacity:.9}.wide{width:100%;padding:15px 18px;margin-top:12px}.filename{margin:14px 0 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}.hint{color:#74808e;font-size:13px;line-height:1.5}.error{color:#9e2f2f;background:#fff0f0;border:1px solid #f1c6c6;padding:12px;border-radius:8px}.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}.metric{background:#fff;border:1px solid #dde2e8;border-radius:12px;padding:18px;display:flex;flex-direction:column}.metric strong{font-size:28px}.metric span{color:#74808e;font-size:12px;margin-top:2px}.metric.warn{border-color:#e6c46b}.metric.ok{border-color:#b8d8c2}.actions,.lessons,.warning-box,.note{padding:24px;margin-top:18px}h2{margin:0 0 8px;font-size:20px}.actions p,.warning-box p,.note p{color:#667381;line-height:1.55}.secondary-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:12px}.secondary-actions button,.lesson-downloads button{border:1px solid #d7dde4;background:#fff;padding:9px 12px;border-radius:8px;cursor:pointer}.warning-box{border-color:#e7ca78;background:#fffdf7}.warning-box li{margin:7px 0}.lesson{border-top:1px solid #e7ebef}.lesson:first-of-type{margin-top:16px}.lesson-head{width:100%;border:0;background:transparent;display:flex;justify-content:space-between;gap:20px;text-align:left;padding:16px 0;cursor:pointer;font-weight:700}.lesson-head span:last-child{color:#75808c;font-size:13px;font-weight:500}.lesson-body{padding:0 0 18px}.lesson-downloads{margin-bottom:12px}.blocks{margin:0;padding-left:26px}.blocks li{padding:9px 6px;border-bottom:1px solid #eef1f4}.blocks li:last-child{border-bottom:0}.meta,.preview,.image-name{display:block;margin-top:3px;color:#74808e;font-size:12px;line-height:1.45}.preview{color:#4e5965}.image-name{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.note{border-left:4px solid #17202a}@media(max-width:700px){.hero{flex-direction:column}.summary-grid{grid-template-columns:repeat(2,1fr)}.version{align-self:flex-start}}.compact-hero .lead{max-width:560px}.download-panel{margin-top:18px;padding:24px}.download-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid #e7ebef}.download-header .hint{margin:4px 0 0}.lesson-list{display:flex;flex-direction:column}.lesson-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 0;border-bottom:1px solid #eef1f4}.lesson-row:last-child{border-bottom:0;padding-bottom:0}.lesson-name{display:flex;align-items:center;gap:12px;min-width:0;font-weight:650}.lesson-name>span:last-child{overflow-wrap:anywhere}.lesson-number{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:28px;border-radius:7px;background:#eef1f4;color:#596675;font-size:12px;font-weight:750}.secondary{border:1px solid #d7dde4;background:#fff;color:#17202a;padding:9px 12px;border-radius:8px;cursor:pointer;white-space:nowrap}.secondary:hover{background:#f7f8fa}@media(max-width:700px){.download-header,.lesson-row{align-items:stretch;flex-direction:column}.download-header .primary,.lesson-row .secondary{width:100%}}.header-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}.language-switch{display:inline-flex;align-items:center;padding:3px;border:1px solid #d9dee5;border-radius:999px;background:#fff}.language-option{border:0;background:transparent;color:#687484;min-width:38px;padding:6px 9px;border-radius:999px;font-size:12px;font-weight:750;cursor:pointer}.language-option:hover{background:#f3f5f7}.language-option.active{background:#17202a;color:#fff}@media(max-width:700px){.header-tools{justify-content:flex-start}}.compatibility{margin-top:18px;padding:24px}.compat-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.compat-head .hint{margin:4px 0 0}.compat-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.compat-metrics>div{border:1px solid #dde2e8;border-radius:10px;padding:14px 16px;display:flex;flex-direction:column}.compat-metrics strong{font-size:24px}.compat-metrics span{color:#74808e;font-size:12px;margin-top:2px}.compat-metrics .needs-review{border-color:#e4c66e;background:#fffdf7}.review-hint{color:#667381;font-size:13px;line-height:1.55;margin:16px 0 8px}.text-button{border:0;background:transparent;padding:0;color:#34495e;text-decoration:underline;cursor:pointer;font-weight:650}.review-list{margin-top:14px;border-top:1px solid #eef1f4}.review-lesson{padding:14px 0;border-bottom:1px solid #eef1f4}.review-row{display:grid;grid-template-columns:36px 1fr;gap:8px;padding-top:7px;color:#5f6b78;font-size:13px}.review-row span:first-child{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#8a95a1}@media(max-width:700px){.compat-head{align-items:stretch;flex-direction:column}.compat-head .secondary{width:100%}.compat-metrics{grid-template-columns:1fr}}.compat-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.advanced-section{margin-top:18px;border-top:1px solid #eef1f4;padding-top:14px}.advanced-toggle{width:100%;border:0;background:transparent;padding:4px 0;display:flex;align-items:center;justify-content:space-between;gap:14px;color:#526171;cursor:pointer;font-weight:700;text-align:left}.advanced-toggle:hover{color:#17202a}.advanced-toggle span:last-child{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border:1px solid #d7dde4;border-radius:999px;background:#fff;font-size:16px;line-height:1}.advanced-panel{margin-top:12px;padding:14px;border:1px solid #e4e8ed;border-radius:10px;background:#fafbfc}.advanced-panel .hint{margin:0 0 12px}.advanced-panel .compat-actions{justify-content:flex-start}@media(max-width:700px){.advanced-panel .compat-actions{flex-direction:column}.advanced-panel .secondary{width:100%}}.intro-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(380px,1.05fr);gap:38px;align-items:stretch;margin-bottom:26px}.intro-copy{min-width:0;padding:8px 0;display:flex;flex-direction:column;justify-content:center}.intro-copy .header-tools{justify-content:flex-start;margin-bottom:34px}.intro-copy .lead{max-width:520px}.local-note{margin:24px 0 0;padding-top:18px;border-top:1px solid #dde2e8;color:#687484;font-size:13px;line-height:1.55;max-width:520px}.upload-drop{min-height:330px;padding:38px 34px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-style:dashed;border-width:2px;background:#fff}.upload-drop:hover{border-color:#aeb8c3}.upload-icon{width:62px;height:62px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;margin-bottom:18px;background:#eef1f4;color:#596675;font-size:13px;font-weight:800;letter-spacing:.08em}.upload-drop h2{margin:0;text-align:center;font-size:21px}.upload-subtitle{max-width:320px;margin:8px 0 20px;color:#74808e;font-size:13px;line-height:1.55;text-align:center}.upload-drop .filename{max-width:100%;overflow-wrap:anywhere;text-align:center}.upload-drop .error{width:100%;margin-bottom:0}@media(max-width:820px){.intro-grid{grid-template-columns:1fr;gap:22px}.intro-copy .header-tools{margin-bottom:24px}.upload-drop{min-height:270px}}.shell{width:min(1100px,100%)}.top-tools{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin-bottom:34px}.intro-grid{grid-template-columns:minmax(0,1fr) minmax(410px,.95fr);gap:54px;align-items:center}.intro-copy{padding:0}.intro-copy h1{font-size:clamp(40px,4.4vw,54px);white-space:nowrap}.intro-copy .lead{margin-top:14px;max-width:500px;font-size:16px}.workflow{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:28px;color:#596675;font-size:13px;font-weight:650}.workflow>div{display:flex;align-items:center;gap:7px}.workflow>div:not(:last-child):after{content:"→";margin-left:11px;color:#a2abb5;font-weight:500}.workflow span{display:inline-flex;align-items:center;justify-content:center;width:23px;height:23px;border-radius:999px;background:#e9edf1;color:#34404d;font-size:11px;font-weight:800}.privacy-note{display:flex;align-items:center;gap:11px;margin-top:30px;padding-top:20px;border-top:1px solid #dde2e8;max-width:500px}.privacy-icon{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;width:30px;height:30px;border-radius:999px;background:#e7f5ed;color:#18794e;font-weight:900}.privacy-note div{display:flex;flex-direction:column;gap:2px}.privacy-note strong{font-size:13px;color:#34404d}.privacy-note div span{color:#74808e;font-size:12px}.upload-drop{min-height:300px;padding:34px;border-color:#d7dde4;box-shadow:0 10px 30px #1220330f;transition:border-color .15s ease,box-shadow .15s ease,transform .15s ease}.upload-drop:hover{border-color:#9fb7aa;box-shadow:0 12px 34px #12203314}.upload-icon{width:58px;height:58px;border-radius:16px;margin-bottom:17px;background:#e7f5ed;color:#18794e}.upload-drop h2{font-size:21px}.upload-subtitle{margin:7px 0 19px}.upload-primary{min-width:150px;background:#18794e;box-shadow:0 2px 5px #18794e2e}.upload-primary:hover{background:#12643f;opacity:1}@media(max-width:980px){.intro-copy h1{white-space:normal}}@media(max-width:820px){.top-tools{justify-content:flex-start;margin-bottom:26px}.intro-grid{grid-template-columns:1fr;gap:26px}.workflow>div:not(:last-child):after{display:none}.upload-drop{min-height:260px}}.workflow-step{opacity:.62;transition:opacity .15s ease,color .15s ease}.workflow-step.active,.workflow-step.complete{opacity:1}.workflow-step.active{color:#17202a}.workflow-step.active span{background:#18794e;color:#fff;box-shadow:0 0 0 3px #e7f5ed}.workflow-step.complete{color:#18794e}.workflow-step.complete span{background:#e7f5ed;color:#18794e}.upload-drop{min-height:270px;padding-top:30px;padding-bottom:30px}@media(max-width:820px){.upload-drop{min-height:245px}}