.dm-app{--p:#2457d6;--p2:#183e9f;--bg:#f5f7fb;--text:#172033;--muted:#667085;--line:#dfe5ef;--green:#18794e;--red:#b42318;width:100%;max-width:none;margin:24px 0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--text);line-height:1.62}
.dm-app *{box-sizing:border-box}.dm-hero{position:relative;overflow:hidden;padding:32px;border-radius:28px;background:linear-gradient(135deg,#142b67 0%,#2457d6 60%,#6a4bd9 100%);color:#fff;box-shadow:0 20px 48px rgba(30,64,175,.22)}
.dm-eyebrow{font-size:12px;font-weight:900;letter-spacing:.8px;text-transform:uppercase;opacity:.88}.dm-hero h2{margin:7px 0 9px!important;color:#fff!important;font-size:clamp(30px,5vw,50px)!important;line-height:1.06!important}.dm-hero p{margin:0;color:rgba(255,255,255,.88);font-size:16px}.dm-hero-row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:20px}.dm-pill{font-size:12px;font-weight:800;padding:7px 10px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.1);border-radius:999px}.dm-progress-text{font-size:12px;font-weight:800}.dm-progress{height:9px;margin-top:10px;background:rgba(255,255,255,.2);border-radius:999px;overflow:hidden}.dm-progress span{display:block;height:100%;width:0;background:#fff;border-radius:999px;transition:.2s}
.dm-card{margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:21px;padding:23px;box-shadow:0 10px 28px rgba(31,42,68,.05)}.dm-card h3{margin-top:0}.dm-lesson-content h3{margin-top:20px!important;font-size:22px!important}.dm-note,.dm-tip{padding:14px 16px;margin:14px 0;border-radius:14px;border:1px solid #ccdafd;background:#edf3ff}.dm-tip{border-color:#cce8d8;background:#edf9f2}.dm-frac{display:inline-grid;grid-template-rows:auto auto;vertical-align:-.55em;text-align:center;line-height:1.02;font-family:"Cambria Math","Times New Roman",serif;font-weight:700;min-width:1.3em;margin:0 .08em}.dm-frac>span:first-child{border-bottom:1.6px solid currentColor;padding:0 .16em .08em}.dm-frac>span:last-child{padding:.08em .16em 0}.dm-section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.dm-section-head h3{margin:0}.dm-section-head p{margin:3px 0;color:var(--muted)}.dm-badge{font-size:12px;font-weight:900;color:var(--p);background:#edf3ff;border-radius:999px;padding:6px 10px;white-space:nowrap}
.dm-question{padding:17px;margin-top:13px;border:1px solid var(--line);border-radius:16px;background:#fff}.dm-q-top{display:flex;align-items:center;gap:9px;margin-bottom:9px}.dm-q-num{display:grid;place-items:center;width:30px;height:30px;border-radius:10px;background:#edf3ff;color:var(--p);font-weight:900}.dm-q-type{font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.45px;color:#7a43d1}.dm-q-text{font-size:16px;font-weight:750}.dm-options{display:grid;gap:8px;margin-top:12px}.dm-option{width:100%;text-align:left;border:1px solid var(--line);border-radius:11px;background:#fff;padding:11px 13px;font:inherit;cursor:pointer;color:var(--text)}.dm-option:hover{background:#f8faff;border-color:#a8bdf2}.dm-option.dm-correct{background:#ebf8f1;border-color:#8fd1ad;color:#14613e}.dm-option.dm-wrong{background:#fff0ef;border-color:#efb5b0;color:#8f2018}.dm-inline-buttons{display:flex;gap:8px;margin-top:12px}.dm-inline-buttons .dm-option{width:auto;min-width:110px;text-align:center;font-weight:800}.dm-fill-row{display:flex;gap:8px;margin-top:12px}.dm-fill{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:inherit}.dm-check-fill,.dm-main-btn,.dm-secondary-btn,.dm-toggle{border:0;border-radius:10px;padding:10px 13px;font-weight:800;cursor:pointer}.dm-check-fill,.dm-main-btn{background:var(--p);color:#fff}.dm-secondary-btn,.dm-toggle{background:#eef2f7;color:#344054}.dm-toggle{margin-top:10px;margin-right:6px}.dm-open{width:100%;min-height:100px;margin-top:11px;border:1px solid var(--line);border-radius:11px;padding:11px;font:inherit;resize:vertical}.dm-hidden{display:none;margin-top:10px;padding:12px 13px;border-radius:12px;background:#edf3ff;border:1px solid #d2defc}.dm-hint{background:#fff5e9;border-color:#f3d1aa}.dm-feedback{margin-top:10px;font-weight:800}.dm-feedback.ok{color:var(--green)}.dm-feedback.bad{color:var(--red)}.dm-result-card p{color:var(--muted)}.dm-result{margin-top:14px;padding:16px;border-radius:14px;background:linear-gradient(135deg,#eef3ff,#f5efff);border:1px solid #cfdbff}.dm-score{font-size:32px;font-weight:950}.dm-error{padding:12px;border:1px solid #efb5b0;background:#fff0ef;border-radius:10px;color:#8f2018}
@media(max-width:650px){.dm-app{margin:12px 0}.dm-hero,.dm-card{padding:18px;border-radius:18px}.dm-fill-row{flex-direction:column}.dm-section-head{flex-direction:column}.dm-inline-buttons{flex-wrap:wrap}}
.dm-html-embed{width:100%;max-width:100%;margin:0 auto}.dm-html-frame{display:block;width:100%;height:1200px;border:0;background:#fff;border-radius:18px;overflow:hidden;}.dm-html-embed noscript{display:block;padding:14px;border:1px solid #f0c36d;background:#fff8e5;border-radius:10px}