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UI,sans-serif}:root[data-theme=dark]{color:#eef2fb;--ink:#eef2fb;--muted:#a8b2c5;--accent-text:#ff9b88;--paper:#182238;--wash:#111a2b;--line:#2c3850;--success:#5bd58a;--danger:#ff8e7d;--app-bg:#0c1321;--surface:#182238;--surface-soft:#111a2b;--surface-muted:#121c2e;--surface-hover:#ffffff12;--heading:#f5f7fd;--body-copy:#b7c0d1;--sidebar-copy:#c1cad9;--sidebar-label:#b5bfce;--nav-number-copy:#c1cad9;--topbar:#0b121feb;--topbar-text:#f7f9ff;--soft-shadow:0 18px 46px #0000003d;--card-shadow:0 7px 0 #090f1b, 0 24px 55px #00000047;background:#0c1321}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:radial-gradient(circle at 90% -5%, color-mix(in srgb, var(--course-accent) 10%, transparent), transparent 26rem), var(--app-bg);min-width:320px;min-height:100vh;color:var(--ink);margin:0;transition:color .18s,background-color 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0;font-size:.7rem;line-height:1.5}.menu-scrim{display:none}.main-content{width:calc(100% - 272px);margin-left:272px}.home-page{max-width:1240px;margin:0 auto;padding:52px 64px 100px}.home-hero{grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);align-items:center;gap:60px;min-height:360px;display:grid}.eyebrow{color:var(--accent-text);letter-spacing:.13em;text-transform:uppercase;align-items:center;gap:7px;margin:0 0 12px;font-size:.7rem;font-weight:700;display:flex}.hero-copy h1{max-width:720px;color:var(--heading);letter-spacing:-.052em;margin:0;font-size:clamp(2.8rem,4.6vw,4.6rem);line-height:1}.hero-copy h1 em{color:var(--accent-text);font:inherit;font-style:normal}.hero-lead{max-width:620px;color:var(--body-copy);margin:26px 0 0;font-size:1.08rem;line-height:1.7}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:32px;display:flex}.button{border-radius:var(--radius-control);cursor:pointer;border:1px solid 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strong{color:var(--heading);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:1rem;line-height:1.25;display:-webkit-box;overflow:hidden}.journey-summary{color:var(--muted);-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:.72rem;line-height:1.45;display:-webkit-box;overflow:hidden}.journey-time{color:#626a75;align-items:center;gap:5px;margin-top:3px;font-size:.7rem;display:flex}.label-left .journey-time{justify-content:flex-end}.journey-empty{color:var(--muted);background:var(--surface);border:1px dashed var(--line);text-align:center;border-radius:18px;margin:42px 0 0;padding:28px}.module-page{max-width:900px;margin:0 auto;padding:72px 54px 110px}.module-hero{border-bottom:1px solid var(--line);padding-bottom:52px}.module-number{color:var(--accent-text);letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px;font-size:.72rem;font-weight:700}.module-hero h1{max-width:790px;color:var(--heading);letter-spacing:-.052em;margin:0;font-size:clamp(2.5rem,5vw,4.5rem);line-height:1.02}.module-summary{max-width:690px;color:var(--body-copy);margin:22px 0 0;font-size:1.06rem;line-height:1.75}.module-meta{color:var(--muted);flex-wrap:wrap;gap:22px;margin-top:24px;font-size:.75rem;display:flex}.module-meta span{align-items:center;gap:7px;display:flex}.objective-card{background:color-mix(in srgb, var(--surface) 92%, var(--course-primary));border:1px solid var(--line);border-left:4px solid var(--course-accent);border-radius:var(--radius-card);margin:44px 0 70px;padding:28px 30px}.objective-card h2{color:var(--heading);margin:0;font-size:1.25rem}.objective-card ul{gap:10px;margin:20px 0 0;padding:0;list-style:none;display:grid}.objective-card li{color:var(--body-copy);align-items:flex-start;gap:10px;font-size:.87rem;line-height:1.5;display:flex}.objective-card li svg{color:var(--accent-text);flex:none;margin-top:2px}.lesson-content>section{margin:0 0 78px}.lesson-content h2{max-width:680px;color:var(--heading);letter-spacing:-.035em;margin:0 0 18px;font-size:2rem;line-height:1.18}.lesson-content h3{color:var(--heading)}.lesson-content section>p:not(.eyebrow):not(.formula-strip),.challenge-card>p{max-width:740px;color:var(--body-copy);font-size:.98rem;line-height:1.8}.lesson-content blockquote{color:var(--heading);background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--course-accent);border-radius:0 12px 12px 0;margin:30px 0 0;padding:23px 26px;font-family:Georgia,Times New Roman,serif;font-size:1.28rem;font-style:italic}.principle-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px;display:grid}.principle-grid div{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:20px}.principle-grid span{color:var(--accent-text);font-size:.66rem;font-weight:700}.principle-grid h3{margin:18px 0 7px;font-size:.96rem}.principle-grid p{color:var(--muted);margin:0;font-size:.75rem;line-height:1.55}.learning-flow{margin-bottom:78px}.learning-flow-progress{justify-content:center;align-items:center;gap:9px;margin-bottom:14px;display:flex}.learning-flow-dot{color:#777d87;cursor:pointer;background:#e8e4dc;border:2px solid #0000;border-radius:50%;place-items:center;width:34px;height:34px;font-size:.72rem;font-weight:800;display:grid}.learning-flow-dot.is-active{color:var(--heading);background:var(--surface);border-color:var(--course-accent);box-shadow:0 3px 0 color-mix(in srgb, var(--course-accent) 68%, black)}.learning-flow-dot.is-complete{color:#fff;background:var(--success)}.learning-flow-dot:disabled{cursor:not-allowed;opacity:.42}.learning-flow-counter{color:var(--muted);letter-spacing:.05em;text-transform:uppercase;justify-content:space-between;gap:20px;margin-bottom:10px;font-size:.69rem;font-weight:700;display:flex}.learning-flow-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-card);min-height:380px;box-shadow:var(--soft-shadow);padding:30px}.learning-flow-card>h2{margin-bottom:24px}.learning-flow-card .challenge-card,.learning-flow-card .knowledge-check{margin-bottom:0}.learning-flow-navigation{border-top:1px solid var(--line);justify-content:space-between;gap:18px;margin-top:16px;padding-top:16px;display:flex}.learning-flow-hint{color:var(--muted);text-align:right;margin:9px 0 0;font-size:.72rem}.challenge-card,.knowledge-check{background:var(--course-primary);border-radius:var(--radius-card);color:#fff;margin:0 0 78px;padding:28px;box-shadow:0 18px 48px #1b263e26}.challenge-heading{justify-content:space-between;gap:20px;display:flex}.challenge-card .eyebrow,.knowledge-check .eyebrow{color:#8fd2ff}.challenge-card h3,.knowledge-check h3{color:#fff;margin:0;font-size:1.32rem;line-height:1.35}.challenge-card>p{color:#e1e8f0}.challenge-count{color:#bdc9d7;font-size:.75rem}.mini-progress{margin:22px 0}.scenario{color:var(--course-primary);background:#fff;border-radius:10px;padding:23px;font-size:1rem;font-weight:600;line-height:1.55}.category-options{grid-template-columns:repeat(2,1fr);gap:10px;margin-top:13px;display:grid}.category-button{color:#fff;cursor:pointer;background:#ffffff14;border:1px solid #ffffff2e;border-radius:9px;min-height:48px;padding:13px;font-weight:600}.category-button:hover:not(:disabled),.category-button.is-selected{background:color-mix(in srgb, var(--course-accent) 80%, transparent);border-color:var(--course-accent)}.category-button:disabled{cursor:default;opacity:.55}.category-button.is-selected{opacity:1}.challenge-complete{flex-direction:column;align-items:flex-start;display:flex}.challenge-complete>svg{color:#6bd69a;margin-bottom:18px}.challenge-complete .button{margin-top:10px}.challenge-review-actions,.challenge-navigation{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:18px;display:flex}.challenge-navigation{border-top:1px solid #ffffff1f;padding-top:14px}.challenge-card .button-quiet:disabled{opacity:.4}.flashcard-deck{color:#fff;background:var(--course-primary);border-radius:var(--radius-card);margin:0 0 78px;padding:28px;box-shadow:0 18px 48px #1b263e26}.flashcard-heading{justify-content:space-between;align-items:flex-start;gap:20px;display:flex}.flashcard-heading .eyebrow,.flashcard-complete .eyebrow{color:color-mix(in srgb, var(--course-accent) 75%, white)}.flashcard-heading h3,.flashcard-complete 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