.course-head{display:flex;flex-direction:column;gap:6px;margin-bottom:20px}.breadcrumb{font-size:12px;color:var(--text-light)}.breadcrumb a{color:var(--text-light);text-decoration:none}.breadcrumb a:hover{color:var(--primary)}.course-head h1{font-size:22px;font-weight:800;color:var(--text);margin:0}.course-head .meta{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--text-light);margin-top:4px}.course-head .progress{display:flex;align-items:center;gap:10px;margin-top:12px}.progress-track{flex:1;max-width:240px;height:5px;background:var(--border);border-radius:99px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .3s}.course-layout{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}@media(max-width:900px){.course-layout{grid-template-columns:1fr}}.player-wrap{background:#000;border-radius:12px;overflow:hidden;aspect-ratio:16/9;position:relative;margin-bottom:14px}.player-wrap iframe{width:100%;height:100%;border:0}.player-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#ffffffb3;font-size:13px}.lesson-info{padding:16px 18px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:16px}.lesson-info h2{font-size:18px;font-weight:700;color:var(--text);margin:0 0 6px}.lesson-info p.desc{font-size:13px;color:var(--text-mid);line-height:1.5;margin:0}.article-content{padding:22px 26px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;font-size:14px;color:var(--text-mid);line-height:1.65;word-break:break-word}.article-content>*:first-child{margin-top:0}.article-content>*:last-child{margin-bottom:0}.article-content h1{font-size:22px;font-weight:800;color:var(--text);margin:24px 0 10px;line-height:1.3}.article-content h2{font-size:18px;font-weight:700;color:var(--text);margin:22px 0 8px;line-height:1.3}.article-content h3{font-size:15px;font-weight:700;color:var(--text);margin:18px 0 6px;line-height:1.35}.article-content h4{font-size:13px;font-weight:700;color:var(--text);margin:16px 0 4px;text-transform:uppercase;letter-spacing:.04em}.article-content p{margin:0 0 12px}.article-content strong{color:var(--text);font-weight:700}.article-content em{font-style:italic}.article-content ul,.article-content ol{margin:0 0 14px;padding-left:22px}.article-content li{margin-bottom:4px}.article-content li>p{margin:0}.article-content code{background:var(--bg);padding:1px 6px;border-radius:4px;font-family:var(--font-mono);font-size:12.5px;color:var(--primary)}.article-content blockquote{border-left:3px solid var(--primary-mid);padding:4px 0 4px 14px;margin:14px 0;color:var(--text-light);font-style:italic}.article-content blockquote p{margin:4px 0}.article-content hr{border:none;border-top:1px solid var(--border);margin:20px 0}.article-content a{color:var(--primary);text-decoration:underline}.article-content a:hover{color:var(--primary-hover)}.external-card{display:flex;align-items:center;gap:12px;padding:14px 16px;background:linear-gradient(135deg,var(--primary-light) 0%,#fff 100%);border:1px solid var(--primary-mid);border-radius:12px;margin-bottom:16px;text-decoration:none;color:inherit;transition:background .15s}.external-card:hover{background:var(--primary-light)}.external-card-ico{width:40px;height:40px;border-radius:10px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}.external-card-body{flex:1;min-width:0}.external-card-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:2px}.external-card-url{font-size:11px;color:var(--text-light);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.external-card-arrow{color:var(--primary);font-size:18px;flex-shrink:0}.action-row{display:flex;gap:10px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.btn-done{padding:10px 20px;border-radius:99px;border:none;cursor:pointer;font:inherit;font-size:14px;font-weight:700;background:var(--primary);color:#fff;display:inline-flex;align-items:center;gap:8px;transition:background .15s,transform .1s}.btn-done:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-done:disabled{opacity:.5;cursor:not-allowed}.done-badge{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--primary-light);color:var(--primary);border-radius:99px;font-size:13px;font-weight:700}.quiz-box{background:var(--bg-card);border:1.5px solid var(--primary-mid);border-radius:14px;padding:20px 22px;margin-bottom:16px}.quiz-box.reflection{border-color:#fbbf24;background:linear-gradient(135deg,#fffbeb,#fff 60%)}.quiz-box.reflection .quiz-head-ico{background:#fbbf24;color:#78350f}.quiz-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.quiz-head-ico{width:36px;height:36px;border-radius:10px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}.quiz-head h3{font-size:16px;font-weight:700;color:var(--text);margin:0}.quiz-head p{font-size:12px;color:var(--text-light);margin:2px 0 0}.quiz-question{margin-bottom:20px;padding:14px 16px;background:var(--bg);border:1px solid var(--border);border-radius:10px}.quiz-question:focus-within{border-color:var(--primary-mid)}.quiz-question-label{display:flex;align-items:flex-start;gap:10px;font-size:14px;font-weight:600;color:var(--text);margin-bottom:10px;line-height:1.45}.quiz-question-num{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--primary);color:#fff;font-size:12px;font-weight:700;text-align:center;line-height:24px;margin-top:1px}.quiz-textarea{width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font:inherit;font-size:13px;color:var(--text);background:#fff;outline:none;resize:vertical;min-height:70px;font-family:var(--font);box-sizing:border-box}.quiz-textarea:focus{border-color:var(--primary)}.quiz-textarea.graded{background:var(--bg);cursor:default}.quiz-submit{padding:12px 24px;border-radius:99px;border:none;cursor:pointer;font:inherit;font-size:14px;font-weight:700;background:var(--primary);color:#fff;display:inline-flex;align-items:center;gap:8px;margin-top:4px}.quiz-submit:hover{background:var(--primary-hover)}.quiz-submit:disabled{opacity:.5;cursor:wait}.quiz-result{margin-top:16px;padding:16px 18px;border-radius:12px;border:1px solid}.quiz-result.passed{background:#d1fae5;border-color:#6ee7b7;color:#065f46}.quiz-result.failed{background:#fef3c7;border-color:#fcd34d;color:#92400e}.quiz-result-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.quiz-result-title{font-size:15px;font-weight:700}.quiz-result-score{font-size:22px;font-weight:800}.quiz-result-feedback{font-size:13px;line-height:1.5}.quiz-per-q{margin-top:12px;padding-top:12px;border-top:1px solid rgba(0,0,0,.08);font-size:12px}.quiz-per-q-item{padding:6px 0}.quiz-per-q-score{font-weight:700;margin-right:6px}.lessons-list{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden;position:sticky;top:14px}.lessons-list-head{padding:12px 14px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--text-light);border-bottom:1px solid var(--border)}.lesson-row{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);text-decoration:none;color:inherit;cursor:pointer;transition:background .15s}.lesson-row:last-child{border-bottom:none}.lesson-row:hover{background:var(--bg)}.lesson-row.active{background:var(--primary-light)}.lesson-row.locked{opacity:.5;cursor:not-allowed}.lesson-row.locked:hover{background:transparent}.lesson-icon{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--border);color:var(--text-light);font-size:12px;font-weight:700;flex-shrink:0}.lesson-row.completed .lesson-icon{background:var(--primary);color:#fff}.lesson-body{flex:1;min-width:0}.lesson-title{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-dur{font-size:11px;color:var(--text-light);margin-top:2px}.lesson-type-badge{font-size:9px;font-weight:700;text-transform:uppercase;padding:1px 6px;border-radius:99px;margin-left:4px;vertical-align:middle}.lesson-type-video{background:#dbeafe;color:#1d4ed8}.lesson-type-article{background:#e0e7ff;color:#4338ca}.lesson-type-external{background:#fef3c7;color:#92400e}.lesson-type-quiz{background:#fce7f3;color:#be185d}.scoring-note{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;margin-bottom:18px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;font-size:12.5px;color:var(--text-mid);line-height:1.5}.scoring-note-ico{font-size:18px;flex-shrink:0;line-height:1;margin-top:1px}.scoring-note strong{color:var(--text)}.scoring-note a{color:var(--primary);text-decoration:underline;font-weight:600}.cert-banner{display:flex;align-items:center;gap:16px;padding:18px 22px;margin-bottom:20px;background:linear-gradient(135deg,#fef9e7,#fef3c7);border:1.5px solid #f59e0b;border-radius:14px;box-shadow:0 10px 24px #f59e0b1f}.cert-banner-ico{font-size:36px;flex-shrink:0}.cert-banner-body{flex:1;min-width:0}.cert-banner-title{font-size:16px;font-weight:800;color:#92400e;margin-bottom:4px}.cert-banner-sub{font-size:13px;color:#78350f;line-height:1.45}.cert-banner-cta{padding:10px 18px;background:#0f6e56;color:#fff;border-radius:99px;font-size:13px;font-weight:700;text-decoration:none;white-space:nowrap;flex-shrink:0;display:inline-flex;align-items:center;gap:6px}.cert-banner-cta:hover{background:#134e4a}.completion-toast{position:fixed;bottom:80px;left:50%;transform:translate(-50%);background:var(--primary);color:#fff;padding:10px 18px;border-radius:99px;font-size:13px;font-weight:600;z-index:1000;display:none;box-shadow:0 8px 30px #0003}.completion-toast.show{display:block;animation:toastSlide .3s ease}@keyframes toastSlide{0%{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%)}}