.course{max-width:880px;margin:0 auto;padding:28px 20px 70px}.course-hero{margin-bottom:30px}.course-step{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);margin-bottom:22px;padding:22px 24px}.course-step-eyebrow{font-family:var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--text-faint);margin:0 0 6px;font-size:11px}.course-step-title{margin:0 0 4px;font-size:19px}.course-step-line{color:var(--text-dim);margin:0 0 14px;font-size:14px}.course-study{flex-wrap:wrap;gap:8px;margin-bottom:18px;display:flex}.quiz{border-top:1px dashed var(--line);padding-top:14px}.quiz-head{margin:0 0 12px;font-size:14px;font-weight:650}.quiz-count{font-family:var(--mono);color:var(--text-faint);margin-left:10px;font-size:11px;font-weight:400}.quiz-q{border:none;margin:0 0 16px;padding:0}.quiz-question{padding:0 0 8px;font-size:14px;font-weight:600}.quiz-options{gap:6px;display:grid}.quiz-option{text-align:left;color:var(--text);border:1px solid var(--line);cursor:pointer;font-size:13.5px;line-height:1.45;font-family:var(--sans);background:0 0;border-radius:8px;align-items:baseline;gap:10px;padding:8px 12px;transition:border-color .12s,background .12s;display:flex}.quiz-option:hover:not(:disabled){border-color:var(--line-strong);background:var(--navy-600)}.quiz-option:disabled{cursor:default}.quiz-option-key{font-family:var(--mono);color:var(--text-faint);border:1px solid var(--line);border-radius:4px;flex-shrink:0;padding:0 5px;font-size:11px}.quiz-option--right{border-color:var(--lift);background:#3ddc8414}.quiz-option--right .quiz-option-key{color:var(--lift);border-color:var(--lift)}.quiz-option--wrong{background:#ff6b6b14;border-color:#ff6b6b}.quiz-option--wrong .quiz-option-key{color:#ff6b6b;border-color:#ff6b6b}.quiz-option--dim{opacity:.5}.quiz-explain{color:var(--text-dim);border-left:2px solid #ff6b6b;margin:8px 0 0;padding-left:10px;font-size:13px;line-height:1.5}.quiz-explain--right{border-left-color:var(--lift)}.quiz-score{color:var(--text);border:1px solid var(--line-strong);border-radius:8px;align-items:center;gap:10px;margin-top:6px;padding:10px 14px;font-size:14px;display:flex}.quiz-retry{font-family:var(--mono);color:var(--altitude);border:1px solid var(--line-strong);border-radius:var(--radius-sm);cursor:pointer;background:0 0;margin-left:auto;padding:4px 12px;font-size:12px}.quiz-retry:hover{background:var(--navy-600)}.acad-page{max-width:980px;margin:0 auto;padding:6vh 24px 70px}.acad-back{font-family:var(--mono);color:var(--altitude);border:1px solid var(--line-strong);border-radius:var(--radius-sm);margin-bottom:26px;padding:6px 12px;font-size:13px;text-decoration:none;display:inline-block}.acad-hero{max-width:640px;margin-bottom:36px}.acad-eyebrow{font-family:var(--mono);letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin:0;font-size:12px}.acad-title{letter-spacing:-.02em;margin:14px 0;font-size:clamp(32px,4.6vw,48px);font-weight:800;line-height:1.05}.acad-accent{color:var(--altitude)}.acad-lede{color:var(--text-dim);margin:0;font-size:16px;line-height:1.6}.acad-progress{align-items:center;gap:10px;display:flex}.acad-progress-track{background:var(--line);border-radius:2px;flex:1;height:4px}.acad-progress-fill{background:var(--lift);border-radius:2px;height:100%}.acad-progress-count{font-family:var(--mono);color:var(--text-faint);white-space:nowrap;font-size:11px}.acad-course-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.acad-course-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);flex-direction:column;gap:10px;padding:20px;text-decoration:none;transition:transform .15s,border-color .15s,background .15s;display:flex}.acad-course-card:hover{border-color:var(--accent);background:var(--navy-700);transform:translateY(-3px)}.acad-course-count{font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);font-size:10px}.acad-course-name{margin:0;font-size:20px}.acad-course-line{color:var(--text-dim);flex:1;margin:0;font-size:13.5px;line-height:1.55}.acad-course-cta{font-family:var(--mono);color:var(--accent);margin-top:4px;font-size:13px}.acad-course-header{max-width:680px;margin-bottom:6px}.acad-course-title{letter-spacing:-.02em;margin:12px 0;font-size:clamp(30px,4.6vw,44px);font-weight:800;line-height:1.08}.acad-course-header .acad-lede{margin-bottom:18px;font-size:15.5px}.acad-course-progressrow{align-items:center;gap:18px;display:flex}.acad-course-progressbar{flex:1}.acad-quiz-pill{font-family:var(--mono);color:#081221;white-space:nowrap;background:#7ecbff;border-radius:999px;padding:8px 16px;font-size:12.5px;font-weight:600;text-decoration:none}.acad-quiz-pill span{opacity:.75;font-weight:400}.acad-part-header{align-items:center;gap:12px;margin:28px 0 14px;display:flex}.acad-part-label{font-family:var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--accent);white-space:nowrap;font-size:11px}.acad-part-rule{background:var(--line);flex:1;height:1px}.acad-lesson-grid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.acad-lesson-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);flex-direction:column;gap:8px;padding:16px 16px 14px;transition:border-color .15s;display:flex}.acad-lesson-card:hover{border-color:var(--line-strong)}.acad-lesson-card--current{border-color:color-mix(in srgb, var(--accent) 45%, transparent)}.acad-lesson-card--done{opacity:.75}.acad-lesson-top{justify-content:space-between;align-items:center;display:flex}.acad-lesson-n{font-family:var(--mono);color:var(--text-faint);letter-spacing:.12em;font-size:10.5px}.acad-lesson-n--current{color:var(--accent)}.acad-lesson-title{color:var(--text);font-size:15.5px;font-weight:650;line-height:1.3;text-decoration:none}.acad-lesson-title:hover{color:var(--altitude)}.acad-lesson-line{color:var(--text-dim);flex:1;font-size:12.5px;line-height:1.45}.acad-lesson-also{flex-direction:column;gap:3px;display:flex}.acad-lesson-also a{font-family:var(--mono);color:var(--text-faint);font-size:11px;text-decoration:none;transition:color .15s}.acad-lesson-also a:hover{color:var(--altitude)}.acad-lesson-foot{justify-content:space-between;align-items:center;gap:8px;display:flex}.acad-lesson-open{font-family:var(--mono);color:var(--altitude);white-space:nowrap;font-size:11.5px;text-decoration:none}.acad-quiz-chip{font-family:var(--mono);color:var(--altitude);border:1px solid var(--line);white-space:nowrap;border-radius:999px;padding:3px 10px;font-size:10.5px;text-decoration:none;transition:border-color .15s}.acad-quiz-chip:hover{border-color:var(--line-strong)}.acad-quiz-chip span{color:var(--text-faint)}.acad-quiz-page{max-width:640px;margin:0 auto;padding:6vh 24px 70px}.acad-quiz-eyebrow{font-family:var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin:0;font-size:11px}.acad-quiz-eyebrow span{color:var(--text-faint)}.acad-quiz-bar{align-items:center;gap:12px;margin:18px 0 26px;display:flex}.acad-quiz-bar-count{font-family:var(--mono);color:var(--text-faint);white-space:nowrap;font-size:11px}.acad-quiz-bar-track{background:var(--line);border-radius:2px;flex:1;height:4px}.acad-quiz-bar-fill{background:var(--accent);border-radius:2px;height:100%;transition:width .25s}.acad-quiz-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:24px 26px}.acad-quiz-q{margin:0 0 18px;font-size:21px;line-height:1.35}.acad-quiz-options{gap:8px;display:grid}.acad-quiz-option{text-align:left;width:100%;color:var(--text);border:1px solid var(--line);cursor:pointer;background:0 0;border-radius:8px;align-items:baseline;gap:10px;padding:11px 14px;font-family:inherit;font-size:14.5px;line-height:1.5;transition:border-color .12s,background .12s;display:flex}.acad-quiz-option:disabled{cursor:default}.acad-quiz-option--right{border-color:var(--lift);background:#3ddc8414}.acad-quiz-option--right .acad-quiz-key{color:var(--lift);border-color:var(--lift)}.acad-quiz-option--wrong{background:#ff6b6b14;border-color:#ff6b6b}.acad-quiz-option--wrong .acad-quiz-key{color:#ff6b6b;border-color:#ff6b6b}.acad-quiz-option--faded{opacity:.5}.acad-quiz-key{font-family:var(--mono);color:var(--text-faint);border:1px solid var(--line);border-radius:4px;flex-shrink:0;padding:0 5px;font-size:11px}.acad-quiz-explain{color:var(--text-dim);margin:14px 0 0;padding-left:10px;font-size:13.5px;line-height:1.55}.acad-quiz-explain--right{border-left:2px solid var(--lift)}.acad-quiz-explain--wrong{border-left:2px solid #ff6b6b}.acad-quiz-nextrow{justify-content:flex-end;margin-top:20px;display:flex}.acad-quiz-next{font-family:var(--mono);color:#081221;cursor:pointer;background:#7ecbff;border:none;border-radius:999px;padding:9px 18px;font-size:13px;font-weight:600;text-decoration:none}.acad-quiz-score{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel);text-align:center;margin-top:22px;padding:30px 28px}.acad-quiz-score-eyebrow{font-family:var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--altitude);margin:0;font-size:12px}.acad-quiz-score-eyebrow--perfect{color:var(--lift)}.acad-quiz-score-num{margin:10px 0 6px;font-size:40px;font-weight:800}.acad-quiz-score-line{color:var(--text-dim);margin:0 0 22px;font-size:14px}.acad-quiz-score-actions{justify-content:center;gap:12px;display:flex}.acad-quiz-retry{font-family:var(--mono);color:var(--altitude);border:1px solid var(--line-strong);border-radius:var(--radius-sm);cursor:pointer;background:0 0;padding:8px 16px;font-size:13px}@media (max-width:960px){.acad-lesson-grid{grid-template-columns:1fr 1fr}}@media (max-width:760px){.acad-course-grid{grid-template-columns:1fr}}@media (max-width:640px){.acad-lesson-grid{grid-template-columns:1fr}.acad-course-progressrow{flex-wrap:wrap}.acad-course-progressbar{flex-basis:100%}.acad-quiz-pill{text-align:center;box-sizing:border-box;width:100%}}@media (max-width:480px){.acad-quiz-panel{padding:18px}}