/* ТурбоУчебник — контентные уроки */
.tb-lesson-list{display:grid;gap:14px}
.tb-lesson-row{display:grid;grid-template-columns:54px 1fr auto;gap:18px;align-items:center;background:var(--s);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--sh)}
.tb-lesson-num{width:46px;height:46px;border-radius:14px;background:var(--s2);display:grid;place-items:center;font-weight:900;color:var(--g);font-size:20px}
.tb-lesson-copy h3{margin:0 0 5px;font-size:20px}.tb-lesson-copy p{margin:0 0 10px;color:var(--m)}
.tb-lesson-copy small{color:var(--m)}.tb-mini-progress{height:7px;background:var(--s2);border-radius:20px;overflow:hidden;max-width:420px;margin:8px 0 5px}.tb-mini-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--r),var(--g))}
.tb-content-lesson{max-width:980px;margin:auto}.tb-content-lesson h1{font-size:clamp(38px,5vw,62px)}
.tb-theory-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:28px 0}
.tb-theory-card,.tb-example,.tb-practice,.tb-progress-topic{background:var(--s);border:1px solid var(--line);border-radius:22px;box-shadow:var(--sh)}
.tb-theory-card{padding:24px}.tb-theory-card h3{margin:0 0 10px;font-size:21px}.tb-theory-card p{margin:0;color:var(--m);font-size:17px;line-height:1.65}
.tb-example{padding:25px;margin:18px 0;border-left:4px solid var(--g)}.tb-example p{font-size:19px;margin:5px 0 0}
.tb-practice{padding:30px;margin:28px 0}.tb-practice-head{display:flex;justify-content:space-between;align-items:flex-start;gap:15px}.tb-practice-head h2{margin:0}
.tb-save-ok,.tb-save-off{font-size:12px;font-weight:800;border-radius:999px;padding:7px 10px;background:#dff5e9;color:#075f3d}.tb-save-off{background:var(--s2);color:var(--m)}
.tb-question{font-size:30px;font-weight:900;margin:25px 0}
.tb-answer-line{display:flex;gap:10px}.tb-answer-line input{flex:1;border:2px solid var(--line);background:var(--bg);color:var(--t);border-radius:13px;padding:14px 16px;font-size:22px;outline:none}.tb-answer-line input:focus{border-color:var(--g)}
.tb-choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tb-choice{border:1px solid var(--line);background:var(--s2);color:var(--t);padding:15px;border-radius:13px;text-align:left;font-weight:800;cursor:pointer}.tb-choice:hover{border-color:var(--g)}.tb-choice:disabled{cursor:default;opacity:.75}
.tb-practice .fb{margin:16px 0}.tb-lesson-nav{display:flex;justify-content:space-between;gap:12px;margin:30px 0}
.tb-progress-topic{padding:26px;margin-top:20px}.tb-progress-topic .section-title{margin:0 0 18px}.tb-progress-row{display:grid;grid-template-columns:minmax(220px,1.2fr) 1fr 55px;gap:16px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}.tb-progress-row small{display:block;color:var(--m);margin-top:4px}.tb-progress-row strong{text-align:right}
@media(max-width:720px){.tb-lesson-row{grid-template-columns:44px 1fr}.tb-lesson-row>button{grid-column:1/-1}.tb-theory-grid{grid-template-columns:1fr}.tb-choice-grid{grid-template-columns:1fr}.tb-answer-line{flex-direction:column}.tb-progress-row{grid-template-columns:1fr}.tb-progress-row strong{text-align:left}.tb-practice-head{display:block}.tb-save-ok,.tb-save-off{display:inline-block;margin-top:10px}.tb-lesson-nav{flex-direction:column}}

.tb-code{margin:14px 0;padding:16px 18px;background:#071510;color:#d8f7e7;border:1px solid #28513f;border-radius:13px;overflow:auto;font:600 15px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre-wrap}
html[data-theme="light"] .tb-code{background:#10271e;color:#eafff4}