*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',sans-serif;background:#f0f2f5;color:#1a2533;min-height:100vh;display:flex;flex-direction:column}
.cp-topbar{background:#1a2533;color:#fff;padding:0 20px;height:52px;display:flex;align-items:center;gap:16px;position:sticky;top:0;z-index:100;flex-shrink:0}
.cp-topbar__back{color:#a0aec0;text-decoration:none;font-size:13px;display:flex;align-items:center;gap:6px;transition:color .2s}
.cp-topbar__back:hover{color:#fff}
.cp-topbar__title{font-size:14px;font-weight:600;flex:1}
.cp-topbar__prog{display:flex;align-items:center;gap:10px;font-size:13px;color:#a0aec0}
.cp-topbar__bar{width:120px;height:6px;background:#2d3748;border-radius:3px;overflow:hidden}
.cp-topbar__fill{height:100%;background:#48bb78;border-radius:3px;transition:width .4s}
.sidebar-toggle{display:none;background:none;border:none;color:#fff;font-size:22px;cursor:pointer;padding:4px 8px}
@media(max-width:768px){.sidebar-toggle{display:block}}
.cp-layout{display:grid;grid-template-columns:280px 1fr;flex:1;min-height:0}
@media(max-width:768px){.cp-layout{grid-template-columns:1fr}}
.cp-sidebar{background:#1e2d3d;overflow-y:auto;max-height:calc(100vh - 52px);position:sticky;top:52px}
@media(max-width:768px){.cp-sidebar{position:fixed;left:-280px;top:52px;bottom:0;z-index:90;width:280px;transition:left .3s;max-height:none}}
.cp-sidebar.open{left:0}
.sidebar-course{padding:16px 20px;border-bottom:1px solid #2d3a4a}
.sidebar-course__label{font-size:11px;color:#718096;text-transform:uppercase;letter-spacing:.6px;margin-bottom:4px}
.sidebar-course__name{font-size:14px;font-weight:700;color:#fff}
.sidebar-course__meta{font-size:12px;color:#718096;margin-top:4px}
.sidebar-module{border-bottom:1px solid #1a2533}
.sidebar-module__head{padding:12px 20px;font-size:12px;font-weight:700;color:#4a9c6f;text-transform:uppercase;letter-spacing:.4px;display:flex;justify-content:space-between;cursor:pointer;user-select:none}
.sidebar-module__head:hover{background:#243446}
.sidebar-module__count{font-weight:400;color:#718096}
.sidebar-module__lessons{display:none}
.sidebar-module.expanded .sidebar-module__lessons{display:block}
.sidebar-lesson{display:flex;align-items:center;gap:10px;padding:9px 20px 9px 28px;font-size:13px;color:#a0aec0;cursor:pointer;transition:all .15s}
.sidebar-lesson:hover{background:#243446;color:#e2e8f0}
.sidebar-lesson.active{background:#1a3a2f;color:#48bb78}
.sidebar-lesson.done .sl-check{background:#48bb78;border-color:#48bb78;color:#fff}
.sl-check{width:18px;height:18px;border-radius:50%;border:2px solid currentColor;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:10px}
.sl-info{flex:1;min-width:0}
.sl-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.sl-dur{font-size:11px;color:#4a5568;margin-top:1px}
.cp-main{overflow-y:auto;max-height:calc(100vh - 52px)}
.cp-content{max-width:860px;margin:0 auto;padding:28px 24px 60px}
.lesson-video{background:#000;border-radius:12px;overflow:hidden;position:relative;aspect-ratio:16/9;margin-bottom:28px}
.lesson-video__ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;background:linear-gradient(135deg,#0d1117,#1a2533)}
.lesson-video__icon{font-size:60px;opacity:.5}
.lesson-video__title{color:rgba(255,255,255,.8);font-size:17px;font-weight:600;text-align:center;padding:0 32px}
.lesson-video__label{color:rgba(255,255,255,.4);font-size:13px}
.lesson-video iframe{position:absolute;inset:0;width:100%;height:100%;border:none}
.lesson-header{margin-bottom:22px}
.lesson-header__meta{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap}
.lbadge{padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.lbadge--mod{background:#e8f5e9;color:#1a6b3c}
.lbadge--dur{background:#e3f2fd;color:#1565c0}
.lesson-header__title{font-size:24px;font-weight:800;color:#1a2533;line-height:1.2}
.lesson-header__sub{font-size:14px;color:#6b7280;margin-top:8px}
.ts{background:#fff;border-radius:12px;padding:22px;margin-bottom:18px;border:1px solid #e5e7eb}
.ts h3{font-size:16px;font-weight:700;color:#1a2533;margin-bottom:12px;padding-bottom:10px;border-bottom:2px solid #e8f5e9}
.ts p{font-size:15px;line-height:1.7;color:#374151;margin-bottom:10px}
.ts p:last-child{margin-bottom:0}
.ts ul,.ts ol{padding-left:20px;margin-bottom:10px}
.ts li{font-size:15px;line-height:1.65;color:#374151;margin-bottom:5px}
.ts strong{color:#1a2533}
.ib{background:#e8f5e9;border-left:4px solid #1a6b3c;border-radius:0 8px 8px 0;padding:12px 16px;margin:12px 0;font-size:14px;color:#1a3a2f;line-height:1.55}
.wb{background:#fff8e1;border-left:4px solid #ffc107;border-radius:0 8px 8px 0;padding:12px 16px;margin:12px 0;font-size:14px;color:#5d4037;line-height:1.55}
.wgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin:12px 0}
.wcard{background:#f8f9fa;border:1px solid #e5e7eb;border-radius:8px;padding:12px}
.wcard__n{font-size:11px;font-weight:700;color:#6b7280;margin-bottom:3px}
.wcard__name{font-size:14px;font-weight:700;color:#1a2533;margin-bottom:3px}
.wcard__desc{font-size:12px;color:#6b7280}
.wcard__ex{font-size:12px;color:#1a6b3c;margin-top:3px;font-style:italic}
.plist{display:flex;flex-direction:column;gap:8px;margin:12px 0}
.pitem{display:flex;gap:12px;align-items:flex-start;background:#f8f9fa;border-radius:8px;padding:12px}
.pitem__n{width:26px;height:26px;background:#1a6b3c;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}
.pitem__b h4{font-size:14px;font-weight:700;color:#1a2533;margin-bottom:2px}
.pitem__b p{font-size:13px;color:#6b7280;line-height:1.5}
.s5grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:12px 0}
@media(max-width:600px){.s5grid{grid-template-columns:repeat(2,1fr)}}
.s5c{background:#f8f9fa;border-radius:8px;padding:10px;text-align:center;border-top:3px solid}
.s5c__jp{font-size:10px;color:#6b7280;margin-bottom:2px}
.s5c__ru{font-size:13px;font-weight:700;color:#1a2533}
.s5c__d{font-size:11px;color:#6b7280;margin-top:3px}
.mtable{width:100%;border-collapse:collapse;margin:12px 0;font-size:13px}
.mtable th{background:#1a2533;color:#fff;padding:8px 12px;text-align:left}
.mtable td{padding:8px 12px;border-bottom:1px solid #e5e7eb;color:#374151}
.mtable tr:nth-child(even) td{background:#f8f9fa}
.tl{display:flex;flex-direction:column;margin:12px 0}
.tli{display:flex;gap:0}
.tl-dc{display:flex;flex-direction:column;align-items:center;width:32px;flex-shrink:0}
.tl-dot{width:12px;height:12px;border-radius:50%;background:#1a6b3c;margin-top:4px}
.tl-line{width:2px;background:#e5e7eb;flex:1;min-height:12px}
.tli:last-child .tl-line{display:none}
.tl-cnt{padding:0 0 16px 12px;flex:1}
.tl-cnt h4{font-size:14px;font-weight:700;color:#1a2533;margin-bottom:2px}
.tl-cnt p{font-size:13px;color:#6b7280;line-height:1.5}
.tl-cnt span{font-size:11px;color:#1a6b3c;font-weight:600}
.key-terms{background:#fff;border-radius:12px;padding:22px;margin-bottom:18px;border:1px solid #e5e7eb}
.key-terms h3{font-size:16px;font-weight:700;margin-bottom:12px;color:#1a2533}
.term-list{display:flex;flex-direction:column;gap:8px}
.term-item{display:flex;gap:10px;align-items:flex-start}
.term-item__b{background:#1a6b3c;color:#fff;border-radius:6px;padding:3px 8px;font-size:12px;font-weight:700;white-space:nowrap;flex-shrink:0;margin-top:2px}
.term-item__d{font-size:14px;color:#374151;line-height:1.5}
.task-box{background:linear-gradient(135deg,#e8f5e9,#f1f8e9);border:1px solid #a5d6a7;border-radius:12px;padding:20px;margin-bottom:18px}
.task-box__label{font-size:11px;font-weight:700;color:#1a6b3c;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.task-box h3{font-size:15px;font-weight:700;color:#1a3a2f;margin-bottom:8px}
.task-box p{font-size:14px;color:#2d5a3d;line-height:1.6}
.quiz-sec{background:#fff;border-radius:12px;padding:22px;margin-bottom:18px;border:1px solid #e5e7eb}
.quiz-sec h3{font-size:16px;font-weight:700;color:#1a2533;margin-bottom:4px}
.quiz-sec__sub{font-size:13px;color:#6b7280;margin-bottom:18px}
.qitem{margin-bottom:18px}
.qitem__n{font-size:12px;color:#6b7280;margin-bottom:4px}
.qitem__q{font-size:15px;font-weight:600;color:#1a2533;margin-bottom:10px}
.qopts{display:flex;flex-direction:column;gap:7px}
.qopt{display:flex;align-items:center;gap:10px;padding:9px 14px;border-radius:8px;border:2px solid #e5e7eb;cursor:pointer;font-size:14px;color:#374151;background:#f8f9fa;transition:all .15s;text-align:left;width:100%}
.qopt:hover:not(.disabled){border-color:#1a6b3c;background:#e8f5e9}
.qopt.correct{border-color:#1a6b3c!important;background:#e8f5e9!important;color:#1a3a2f;font-weight:600}
.qopt.wrong{border-color:#e53935!important;background:#ffebee!important;color:#b71c1c}
.qopt.disabled{cursor:default}
.qfb{font-size:13px;margin-top:6px;padding:7px 12px;border-radius:6px}
.qfb.ok{background:#e8f5e9;color:#1a6b3c}
.qfb.fail{background:#ffebee;color:#c62828}
.quiz-result{text-align:center;padding:20px;display:none}
.quiz-result__score{font-size:40px;font-weight:800;color:#1a6b3c}
.quiz-result__text{font-size:14px;color:#6b7280;margin-top:4px}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:8px;padding-top:20px;border-top:1px solid #e5e7eb}
.lnbtn{padding:10px 20px;border-radius:8px;border:none;cursor:pointer;font-size:14px;font-weight:600;transition:all .2s;display:flex;align-items:center;gap:8px}
.lnbtn--prev{background:#f1f5f9;color:#475569}
.lnbtn--prev:hover{background:#e2e8f0}
.lnbtn--next{background:#1a6b3c;color:#fff;margin-left:auto}
.lnbtn--next:hover{background:#1a5c34}
.lnbtn--complete{background:#1976d2;color:#fff}
.lnbtn--complete:hover{background:#1565c0}
.cert-wrap{text-align:center;padding:32px 16px}
.cert-card{background:linear-gradient(135deg,#1a2533,#1e3a2f);color:#fff;border-radius:16px;padding:40px;max-width:580px;margin:0 auto}
.cert-title{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:#48bb78;margin-bottom:8px}
.cert-main{font-size:26px;font-weight:800;margin-bottom:6px}
.cert-course{font-size:14px;color:rgba(255,255,255,.65);margin-bottom:20px}
.cert-seal{font-size:48px;margin-bottom:8px}
.cert-org{font-size:16px;font-weight:700;color:#48bb78}
.cert-date{font-size:12px;color:rgba(255,255,255,.45);margin-top:6px}
.cert-score{font-size:14px;color:rgba(255,255,255,.7);margin:12px 0}
.cert-btn{margin-top:20px;padding:10px 24px;background:#48bb78;color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:700;cursor:pointer}
.empty-state{text-align:center;padding:80px 20px;color:#6b7280}
.empty-state__icon{font-size:56px;margin-bottom:12px}
.empty-state h2{font-size:22px;font-weight:700;color:#1a2533;margin-bottom:8px}
.cp-topbar__user{font-size:12px;color:#718096;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex-shrink:1}
.cp-topbar__logout{background:rgba(255,255,255,.12);border:none;color:rgba(255,255,255,.75);font-size:12px;font-weight:600;padding:5px 12px;border-radius:6px;cursor:pointer;white-space:nowrap;flex-shrink:0}
.cp-topbar__logout:hover{background:rgba(255,255,255,.22);color:#fff}
.sp-wrap{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:16/9;margin-bottom:28px;background:#0d1117;user-select:none}
.sp-slide{position:absolute;inset:0;opacity:0;transition:opacity .35s;pointer-events:none}
.sp-slide.active{opacity:1;pointer-events:auto}
.sp-icon{font-size:clamp(36px,5vw,60px);margin-bottom:14px}
.sp-title{font-size:clamp(18px,3vw,30px);font-weight:800;color:#fff;margin-bottom:10px;line-height:1.2}
.sp-sub{font-size:clamp(12px,1.8vw,16px);color:rgba(255,255,255,.55)}
.sp-points{list-style:none;width:100%;max-width:700px}
.sp-points li{display:flex;align-items:flex-start;gap:10px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.07);color:rgba(255,255,255,.85);font-size:clamp(12px,1.6vw,16px);line-height:1.5}
.sp-points li::before{content:'→';color:#48bb78;font-weight:700;flex-shrink:0}
.sp-controls{position:absolute;bottom:0;left:0;right:0;padding:10px 14px;background:linear-gradient(to top,rgba(0,0,0,.85),transparent);display:flex;align-items:center;gap:8px;z-index:10}
.sp-btn{background:rgba(255,255,255,.15);border:none;color:#fff;border-radius:6px;padding:6px 11px;cursor:pointer;font-size:13px;font-weight:600;transition:background .2s}
.sp-btn:hover{background:rgba(255,255,255,.28)}
.sp-btn--play{background:#1a6b3c;padding:6px 16px}
.sp-btn--play:hover{background:#2e7d32}
.sp-dots{display:flex;gap:5px;flex:1;justify-content:center}
.sp-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.3);cursor:pointer;transition:all .2s;flex-shrink:0}
.sp-dot.active{background:#48bb78;width:20px;border-radius:4px}
.sp-counter{font-size:12px;color:rgba(255,255,255,.45);white-space:nowrap}