/* Read the source, then act. No separate right-hand reference column. */
.lesson-page .lesson-source-workspace{min-width:0;width:100%;max-width:1100px;margin-inline:auto;border:1px solid var(--line);border-radius:16px;background:#fff;scroll-margin-top:24px}
.lesson-material{padding:26px 30px;background:#f8f7fb;border-radius:16px 16px 0 0;border-bottom:1px solid var(--line)}
.lesson-material-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:20px}
.lesson-material-heading>div{min-width:0}
.lesson-page .lesson-material-heading h2{font-size:20px;line-height:1.4;letter-spacing:-.2px;margin:0}
.lesson-material-heading p{font-size:14px;line-height:1.6;color:var(--muted);margin:6px 0 0;max-width:70ch}
.lesson-page .lesson-material-jump{display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;min-height:42px;padding:8px 12px;background:#fff;border:1px solid #d8d0e5;border-radius:8px;color:var(--purple);font:inherit;font-size:13px;font-weight:500;line-height:1.45;text-align:center;cursor:pointer}
.lesson-page .lesson-material-jump:hover{background:#f0eafa;border-color:#b8a4d5}
.lesson-material-content{min-width:0}
.lesson-page .lesson-material-content>:is(.case-source,.lesson-source,.writing-source,.docs-source,.safety-rules,.final-source){display:block;position:static;grid-column:auto;grid-row:auto;order:0;max-height:none;overflow:visible;width:100%;min-width:0;margin:0;padding:0;border:0;border-radius:0;background:transparent;box-shadow:none}
.lesson-page .lesson-material-content .source-heading{margin-bottom:12px;align-items:flex-start}
.lesson-page .lesson-material-content .source-heading h3{font-size:16px;line-height:1.5}
.lesson-page .lesson-material-content .file-icon{flex-shrink:0}
.lesson-page .lesson-material-content .source-table td{padding:9px 8px}
.lesson-page .lesson-material-content .source-table th{padding:9px 8px;background:#eeebf3}
.lesson-page .lesson-material-content .source-table td small{display:inline;margin-left:8px;font-size:11px;white-space:nowrap}
.lesson-page .lesson-material-content .source-note{margin-top:14px;font-size:13px;line-height:1.65}
.lesson-page .lesson-material-content :is(.writing-source-heading,.docs-source-heading){display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:12px;flex-wrap:wrap;text-align:left;margin-bottom:12px}
.lesson-page .lesson-material-content :is(.writing-source,.docs-source,.final-source,.safety-rules) h2{font-size:17px;line-height:1.5;margin:0}
.lesson-page .lesson-material-content .final-source>h2{display:inline;margin-left:12px}
.lesson-page .lesson-material-content :is(.docs-source-lead,.final-small){margin:8px 0 14px;font-size:13px}
.lesson-page .lesson-material-content :is(.writing-source-row,.docs-source-row,.final-source-row){border-top:1px solid var(--line);padding:12px 0}
.lesson-page .lesson-material-content :is(.docs-source-row,.final-source-row){display:grid;grid-template-columns:65px minmax(0,1fr);gap:12px;align-items:start;scroll-margin-block:68px;border-radius:0}
.lesson-page .lesson-material-content :is(.docs-source-row,.final-source-row).selected{background:#eee7fb;box-shadow:inset 3px 0 var(--purple);padding-inline:12px}
.lesson-page .lesson-material-content :is(.docs-source-id,.final-row-id){margin:1px 0 0;font-size:12px}
.lesson-page .lesson-material-content .writing-source-row{display:grid;grid-template-columns:65px minmax(0,1fr);gap:12px}
.lesson-page .lesson-material-content .writing-source-row dd{margin:0}
.lesson-page .lesson-material-content :is(.writing-source-note,.docs-source-note,.final-source-note){margin:10px 0 0;padding-top:10px;border-top:1px solid var(--line)}
.lesson-page .lesson-material-content .safety-rules>header{display:flex;flex-direction:row;align-items:center;justify-content:flex-start;gap:12px;text-align:left}
.lesson-page .lesson-material-content .safety-rule{display:grid;grid-template-columns:65px minmax(0,1fr);gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.lesson-page .lesson-material-content .safety-rule p{margin:0}
.lesson-source-task{min-width:0}
.lesson-source-toolbar{position:sticky;top:0;z-index:4;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 30px;border-bottom:1px solid var(--line);background:#fff}
.lesson-source-toolbar>strong{font-size:14px;font-weight:500;color:var(--muted);scroll-margin-top:18px}
.lesson-material-heading h2{scroll-margin-top:24px}
.lesson-source-task-content{min-width:0;padding:28px 30px 30px}
.lesson-page .lesson-source-task-content>:is(.panel,.report-editor-layout,.report-compare,.report-verification-form,.case-work){min-width:0;margin:0;padding:0;border:0;border-radius:0;box-shadow:none;background:transparent}
.lesson-page .lesson-source-task-content .report-editor-layout>.editor-panel{padding:0;border:0;background:transparent}
.lesson-page .lesson-source-task-content :is(.report-compare h2,.editor-title,#report-review-title,.writing-step-header,.docs-step-header,.safety-stage-heading,.final-step-header){scroll-margin-top:82px}
.lesson-page :is(.writing-layout,.docs-layout,.safety-layout,.final-layout,.lesson-layout).without-source{display:block;width:100%;max-width:1100px;margin-inline:auto}
.lesson-page .basics-source{border:1px solid var(--line);border-radius:10px;background:#f8f7fb;padding:18px 20px}

@media(min-width:1600px){
  .lesson-page .lesson-material-content .case-source{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(230px,.8fr);gap:28px}
  .lesson-page .lesson-material-content .case-source .source-note{align-self:center;margin:0}
}
@media(max-width:650px){
  .lesson-material{padding:20px 18px}
  .lesson-material-heading{gap:12px;flex-direction:column;margin-bottom:16px}
  .lesson-page .lesson-material-heading h2{font-size:19px}
  .lesson-material-heading p{font-size:14px}
  .lesson-source-toolbar{padding:10px 18px;gap:8px;flex-wrap:wrap}
  .lesson-source-toolbar>strong{font-size:13px}
  .lesson-page .lesson-material-jump{min-height:44px;font-size:13px;padding:8px 10px;white-space:normal;max-width:100%}
  .lesson-source-task-content{padding:22px 18px}
  .lesson-page .lesson-source-task-content :is(.report-compare h2,.editor-title,#report-review-title,.writing-step-header,.docs-step-header,.safety-stage-heading,.final-step-header){scroll-margin-top:130px}
  .lesson-page .lesson-material-content :is(.docs-source-row,.final-source-row,.writing-source-row,.safety-rule){grid-template-columns:minmax(0,1fr);gap:4px}
  .lesson-page .lesson-material-content .source-table{font-size:13px;table-layout:fixed}
  .lesson-page .lesson-material-content .source-table th:first-child{width:62%}
  .lesson-page .lesson-material-content .source-table td{padding:10px 4px;overflow-wrap:anywhere}
  .lesson-page .lesson-material-content .source-table td small{display:block;margin:4px 0 0;font-size:11px}
  .lesson-page .lesson-material-content .source-table th{padding:8px 4px}
}