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0;padding:0;color:var(--muted);list-style:none;font-size:.88rem;font-weight:700}.trust-list li{display:inline-flex;gap:7px;align-items:center}.trust-list svg{color:#3c9062}.hero-artwork{margin:0;overflow:hidden;border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line));border-radius:18px;background:#081822;box-shadow:0 22px 48px #08141b3d}.hero-artwork img{display:block;width:100%;height:auto}.card-number{color:var(--accent-strong);font-size:.76rem;font-weight:900;font-variant-numeric:tabular-nums}.section-block{padding-top:68px}.section-heading{max-width:800px;margin-bottom:24px}.section-heading>:last-child{color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.card{padding:23px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.card 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17px;border:1px solid var(--danger-line);border-radius:13px;background:var(--danger-soft)}.code-warning span{color:var(--muted);font-size:.9rem}.lesson-content{font-size:1.04rem}.lesson-content h2{margin-top:48px;margin-bottom:15px}.lesson-content h3{margin-top:32px}.lesson-content p,.lesson-content ul,.lesson-content ol,.lesson-content table{max-width:760px}.lesson-content blockquote{margin:30px 0;padding:18px 20px;border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));border-left:5px solid var(--accent);border-radius:0 13px 13px 0;background:var(--accent-soft)}.lesson-content blockquote p{margin:0}.lesson-content code{padding:.15rem .38rem;border-radius:6px;background:var(--surface-2);font-family:SFMono-Regular,Consolas,monospace}table{width:100%;border-collapse:collapse}th,td{padding:12px 10px;border-bottom:1px solid 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small{color:var(--muted)}.progress-row>a{display:inline-flex;gap:6px;align-items:center;color:var(--muted);font-weight:750;text-decoration:none}.file-button input{position:absolute;width:1px;height:1px;opacity:0}.import-status{min-height:1.5em;color:var(--muted)}.centered-page{max-width:760px;margin:9vh auto 0;text-align:center}.centered-page .hero-actions{justify-content:center}.large-mark{display:grid;width:76px;height:76px;place-items:center;margin:0 auto 25px;border-radius:22px;background:var(--accent);color:#221807;font-size:2rem}.update-toast{position:fixed;z-index:90;right:20px;bottom:20px;width:min(380px,calc(100vw - 40px));padding:17px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:0 20px 50px #00000038}.update-toast[hidden]{display:none}.update-toast 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var(--line);border-radius:14px;background:var(--surface)}.player-progress-card p{margin:8px 0 0;color:var(--muted);font-size:.75rem;line-height:1.4}.player-section-nav{display:grid;gap:5px;margin-top:10px}.player-section-nav button{display:grid;grid-template-columns:30px minmax(0,1fr) 20px;gap:8px;align-items:center;width:100%;padding:11px 10px;border:1px solid transparent;border-radius:11px;background:transparent;color:var(--muted);text-align:left;cursor:pointer;line-height:1.25}.player-section-nav button>span:first-child{display:grid;width:28px;height:28px;place-items:center;border-radius:8px;background:var(--surface-2);color:var(--text);font-size:.76rem;font-weight:900}.player-section-nav button>span:nth-child(2){font-size:.79rem;font-weight:750}.player-section-nav small{display:block;margin-bottom:3px;color:var(--muted);font-size:.64rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.player-section-nav button:hover,.player-section-nav button.active{border-color:var(--line);background:var(--surface);color:var(--text)}.player-section-nav button.active{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));box-shadow:var(--shadow)}.player-section-nav button.complete>span:first-child{background:#dff2e7;color:#237548}.section-state{display:grid;color:var(--muted);text-align:center;place-items:center}.player-section-nav button.complete .section-state{color:#2f8a5b;font-weight:900}.player-stage{min-width:0}.course-player[data-player-enhanced=true] .course-section:not(.is-active){display:none}.course-section{overflow:hidden;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--shadow)}.course-section-header{padding:clamp(24px,4vw,42px);border-bottom:1px solid var(--line);background:linear-gradient(145deg,var(--surface),var(--accent-soft))}.course-section-header h2{margin-bottom:14px;font-size:clamp(2rem,4vw,3.15rem)}.course-section-header>p:last-child{max-width:740px;margin-bottom:0;color:var(--muted);font-size:1.04rem}.key-points{margin:28px clamp(20px,4vw,40px);padding:21px 23px;border-left:4px solid var(--accent);border-radius:0 13px 13px 0;background:var(--accent-soft)}.key-points ul{margin-bottom:0;padding-left:1.2rem}.media-sequence{display:grid;gap:22px;padding:4px clamp(20px,4vw,40px) 34px}.media-placeholder{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:16px;background:var(--bg)}.media-frame{aspect-ratio:16 / 8.6;background:var(--navy)}.media-frame video{display:block;width:100%;height:100%;background:#05090b}.media-frame 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35%);border-radius:50%;background:#ffffff14;color:var(--accent);font-size:1.5rem}.placeholder-visual>span:nth-child(2){font-size:.72rem;font-weight:850}.placeholder-visual small{color:#aebdc3;font-size:.72rem;letter-spacing:normal}.media-placeholder figcaption{padding:20px 22px}.media-title-row{display:flex;gap:20px;align-items:start;justify-content:space-between}.media-title-row span{color:var(--accent-strong);font-size:.66rem;font-weight:900;letter-spacing:.09em;text-transform:uppercase}.media-title-row h3{margin:3px 0 0;font-size:1.25rem}.media-title-row>strong{padding:5px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:.7rem}.media-placeholder figcaption>p{margin:10px 0;color:var(--muted)}.media-placeholder details{margin-top:13px;padding-top:12px;border-top:1px solid var(--line)}.media-placeholder summary{display:flex;gap:7px;align-items:center;color:var(--text);cursor:pointer;font-size:.82rem;font-weight:800}.media-placeholder details p{margin-bottom:0;color:var(--muted);font-size:.82rem}.section-quiz{margin:0 clamp(20px,4vw,40px) 34px;padding:clamp(20px,3vw,30px);border:1px solid var(--line);border-radius:17px;background:var(--bg)}.quiz-heading{display:flex;gap:20px;align-items:start;justify-content:space-between}.quiz-heading h3{font-size:1.5rem}.quiz-heading h3{display:flex;gap:8px;align-items:center}.quiz-score{padding:6px 10px;border-radius:999px;background:var(--surface);color:var(--muted);font-size:.72rem;font-weight:800;white-space:nowrap}.quiz-questions{display:grid;gap:13px}.quiz-question{min-width:0;margin:0;padding:17px;border:1px solid var(--line);border-radius:13px;background:var(--surface)}.quiz-question.correct{border-color:#75aa8b}.quiz-question.incorrect{border-color:var(--danger-line)}.quiz-question legend{display:flex;gap:9px;width:100%;padding:0 0 12px;font-weight:800;line-height:1.4}.quiz-question legend>span{display:grid;flex:0 0 auto;width:25px;height:25px;place-items:center;border-radius:7px;background:var(--accent-soft);color:var(--accent-strong);font-size:.72rem}.quiz-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.quiz-options label{display:flex;gap:9px;align-items:start;padding:10px;border:1px solid var(--line);border-radius:9px;cursor:pointer;font-size:.86rem;line-height:1.4}.quiz-options label:hover{border-color:var(--accent)}.quiz-options input{flex:0 0 auto;margin-top:3px;accent-color:var(--accent-strong)}.quiz-explanation{margin:12px 0 0;padding:10px 12px;border-radius:9px;background:var(--surface-2);color:var(--muted);font-size:.82rem}.quiz-submit-row{display:flex;gap:18px;align-items:center;margin-top:17px}.quiz-submit-row p{margin:0;color:var(--muted);font-size:.82rem}.player-controls{display:flex;gap:16px;align-items:center;justify-content:space-between;margin:0;padding:20px clamp(20px,4vw,40px);border-top:1px solid 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