:root{--font-display:"Libre Baskerville", Georgia, serif;--font-body:"DM Sans", -apple-system, sans-serif;--font-mono:"DM Mono", "Fira Code", monospace;--text-2xs:10px;--text-xs:11px;--text-sm:11.5px;--text-base:12.5px;--text-md:13px;--text-lg:14px;--text-xl:16px;--text-2xl:1.6rem;--text-3xl:1.9rem;--weight-light:300;--weight-regular:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--leading-tight:1.25;--leading-snug:1.4;--leading-normal:1.5;--leading-relaxed:1.6;--leading-loose:1.65;--leading-body:1.7;--tracking-wide:.4px;--tracking-wider:1.5px;--tracking-widest:3px;--color-red:#c0392b;--color-red-light:#fdecea;--color-red-mid:#e57368;--color-navy:#1b2a4a;--color-navy-light:#2c3e6b;--color-gold:#d4a017;--color-gold-light:#fdf6e3;--color-teal:#0d6e6e;--color-teal-light:#e6f4f4;--color-green:#2e7d32;--color-green-light:#eaf3de;--color-orange:#e65100;--color-orange-light:#fff3e0;--color-purple:#6b3fa0;--color-purple-light:#f3eef9;--color-page-bg:#f5f4f1;--color-divider:#e8e6e1;--color-muted:#7a7870;--color-text:#1b1a18;--color-text-2:#5a5855;--color-white:#fff;--color-border:#d9d7d0;--radius-sm:4px;--radius-md:6px;--radius-base:8px;--radius-lg:10px;--radius-xl:12px;--radius-full:99px;--sidebar-w:260px}[data-theme=dark]{--color-page-bg:#0f1623;--color-white:#1a2338;--color-navy:#0a1020;--color-navy-light:#162035;--color-text:#e8e6e1;--color-text-2:#a8a59e;--color-muted:#7a7870;--color-divider:#2a3550;--color-border:#2a3550;--color-teal-light:#0d2e2e;--color-red-light:#2e1a19;--color-gold-light:#2e2610;--color-green-light:#162110;--color-orange-light:#2e1e0a;--color-purple-light:#1e1530}[data-theme=dark] 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.3s;display:flex}.toolbar{justify-content:flex-end;align-items:center;gap:8px;margin-bottom:1rem;display:flex}.toolbar-btn{font-family:var(--font-body);font-size:var(--text-sm);border-radius:var(--radius-full);border:1px solid var(--color-border);background:var(--color-white);color:var(--color-text-2);cursor:pointer;align-items:center;gap:6px;padding:.4rem .9rem;transition:background .15s,color .15s,border-color .15s;display:flex}.toolbar-btn:hover{background:var(--color-divider);color:var(--color-text)}.toolbar-btn:disabled{opacity:.45;cursor:not-allowed}.toolbar-btn:disabled:hover{background:var(--color-white);color:var(--color-text-2)}.auth-controls{align-items:center;gap:8px;display:inline-flex}.sidebar-toggle{z-index:200;background:var(--color-navy);border-radius:var(--radius-md);cursor:pointer;border:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:38px;height:38px;padding:0;display:none;position:fixed;top:14px;left:14px}.sidebar-toggle 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.28s;display:flex;position:fixed;top:0;left:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid #ffffff14;flex-shrink:0;padding:1.5rem 1.25rem 1rem}.sidebar-logo{font-family:var(--font-display);font-size:var(--text-lg);font-weight:var(--weight-regular);color:var(--color-white);margin-bottom:3px;line-height:1.4}.sidebar-sub{font-size:var(--text-xs);font-weight:var(--weight-light);color:#fff6;line-height:1.5}.lecture-selector{border-bottom:1px solid #ffffff14;flex-shrink:0;padding:.5rem 1.25rem}.lecture-selector-btn{border-radius:var(--radius-md);width:100%;color:var(--color-white);font-size:var(--text-xs);font-weight:var(--weight-medium);cursor:pointer;background:#ffffff0a;border:1px solid #ffffff14;justify-content:space-between;align-items:center;padding:.5rem .75rem;transition:background .2s,border-color .2s;display:flex}.lecture-selector-btn:hover{background:#ffffff14;border-color:#ffffff1f}.lecture-arrow{font-size:.7rem;transition:transform .2s}.lecture-arrow.open{transform:rotate(180deg)}.lecture-dropdown{border-radius:var(--radius-md);background:#0000004d;border:1px solid #ffffff14;max-height:250px;margin-top:.4rem;overflow-y:auto}.lecture-option{text-align:left;color:#fffc;width:100%;font-size:var(--text-xs);font-family:var(--font-body);cursor:pointer;background:0 0;border:none;padding:.5rem .75rem;transition:background .15s,color .15s}.lecture-option:hover{color:var(--color-white);background:#ffffff0f}.lecture-option.active{background:var(--color-red);color:var(--color-white);font-weight:var(--weight-medium)}.sidebar-progress{border-bottom:1px solid #ffffff14;flex-shrink:0;padding:.75rem 1.25rem}.progress-label{font-size:var(--text-2xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:#fff6;justify-content:space-between;margin-bottom:6px;display:flex}.progress-bar-track{border-radius:var(--radius-full);background:#ffffff1a;height:4px;overflow:hidden}.progress-bar-fill{background:var(--color-red-mid);border-radius:var(--radius-full);width:0%;height:100%;transition:width .3s}.sidebar-search{border-bottom:1px solid #ffffff14;flex-shrink:0;padding:.6rem 1.25rem;position:relative}.sidebar-search input{width:100%;font-family:var(--font-body);font-size:var(--text-sm);border-radius:var(--radius-base);color:#ffffffd9;background:#ffffff12;border:1px solid #ffffff1a;outline:none;padding:.35rem .75rem .35rem 2rem;transition:border-color .2s,background .2s}.sidebar-search input::placeholder{color:#ffffff4d}.sidebar-search input:focus{background:#ffffff1a;border-color:#ffffff40}.search-icon{pointer-events:none;opacity:.5;font-size:12px;font-style:normal;position:absolute;top:50%;left:1.75rem;transform:translateY(-50%)}.nav-no-results{font-size:var(--text-xs);color:#ffffff4d;padding:.75rem 1.25rem;font-style:italic}.nav-section-label{font-size:var(--text-2xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:#ffffff4d;padding:.8rem 1.25rem .3rem}.nav-list{flex:1;padding-bottom:2rem;list-style:none;overflow-y:auto}.nav-item{color:#fff9;cursor:pointer;border-left:3px solid #0000;align-items:center;gap:8px;padding:.42rem 1.25rem;font-size:11.5px;line-height:1.4;transition:background .15s,color .15s,border-color .15s;display:flex}.nav-item:hover,.nav-item:focus-visible{color:var(--color-white);background:#ffffff0f;outline:none}.nav-item.active{color:var(--color-white);border-left-color:var(--color-red-mid);background:#ffffff17}.nav-item-check{cursor:pointer;background:0 0;border:1.5px solid #fff3;border-radius:3px;flex-shrink:0;justify-content:center;align-items:center;width:14px;height:14px;transition:border-color .2s,background .2s;display:flex}.nav-item-check.checked{background:var(--color-teal);border-color:var(--color-teal)}.nav-item-check.checked:after{content:"✓";color:#fff;font-size:9px;line-height:1}.nav-item-num{font-family:var(--font-mono);font-size:var(--text-2xs);color:#ffffff4d;flex-shrink:0;min-width:20px}.main{margin-left:var(--sidebar-w);max-width:calc(950px + var(--sidebar-w));flex:1;padding:2rem 2.5rem 5rem}.home-main{width:100%;min-height:100vh;padding:2rem 2.5rem 5rem}.home-toolbar{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1.5rem;display:flex}.topic-home{max-width:950px;margin:0 auto;padding:0 0 4rem}.topic-home-label{color:var(--color-red-mid);font-size:var(--text-2xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-widest);text-transform:uppercase;margin-bottom:.5rem}.topic-home h1{color:var(--color-navy);font-family:var(--font-display);font-size:var(--text-3xl);font-weight:var(--weight-bold);line-height:var(--leading-tight);margin:0}.topic-home-sub{color:var(--color-muted);font-size:var(--text-md);margin:0 0 1.5rem}.speciality-list{gap:1.25rem;display:grid}.speciality-section{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-xl);overflow:hidden}.speciality-header{background:var(--color-navy);justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.25rem;display:flex}.speciality-header h2{color:var(--color-white);font-family:var(--font-display);font-size:var(--text-xl);line-height:var(--leading-tight);margin:0}.speciality-header span{color:#ffffff80;font-size:var(--text-xs);font-weight:var(--weight-medium);flex-shrink:0}.topic-link-list{display:grid}.topic-link{border-top:1px solid var(--color-divider);color:var(--color-text);justify-content:space-between;align-items:center;gap:1rem;min-height:52px;padding:.8rem 1.25rem;text-decoration:none;transition:background .15s,color .15s;display:flex}.topic-link:first-child{border-top:none}.topic-link:hover,.topic-link:focus-visible{background:var(--color-page-bg);outline:none}.topic-link-title{font-size:var(--text-md);font-weight:var(--weight-medium)}.topic-link-action{color:var(--color-teal);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-wide);text-transform:uppercase;flex-shrink:0}[data-theme=dark] .topic-home h1{color:#a5b4d4}[data-theme=dark] .speciality-section{background:var(--color-white);border-color:var(--color-border)}[data-theme=dark] .speciality-header{background:#0a1020}@media (max-width:768px){.home-main{padding:1.25rem}.home-toolbar,.speciality-header{flex-direction:column;align-items:flex-start}.topic-link{flex-direction:column;align-items:flex-start;gap:.4rem}}.hero{background:var(--color-navy);border-radius:var(--radius-xl);margin-bottom:2rem;padding:2rem 2.5rem;position:relative;overflow:hidden}.hero:after{content:"";pointer-events:none;background:#c0392b26;border-radius:50%;width:200px;height:200px;position:absolute;bottom:-60px;right:-40px}.hero-label{font-size:var(--text-2xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-widest);text-transform:uppercase;color:var(--color-red-mid);margin-bottom:.5rem}.hero h1{font-family:var(--font-display);font-size:var(--text-3xl);font-weight:var(--weight-bold);line-height:var(--leading-tight);color:var(--color-white);margin-bottom:.5rem}.hero-sub{font-size:var(--text-md);font-weight:var(--weight-light);color:#ffffff80}.hero-readtime{font-size:var(--text-xs);color:#ffffff59;margin-top:4px;font-style:italic}.skeleton-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-xl);margin-bottom:1.5rem;padding:1.25rem;overflow:hidden}.skeleton-line{border-radius:var(--radius-full);background:linear-gradient(90deg, var(--color-divider) 25%, #ede9e0 50%, var(--color-divider) 75%);background-size:200% 100%;height:12px;margin-bottom:10px;animation:1.4s infinite 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1.25rem;display:flex}.slide-badge{font-family:var(--font-mono);font-size:var(--text-2xs);font-weight:var(--weight-medium);color:var(--color-muted);letter-spacing:.5px}.card-nav-title{color:var(--color-muted);font-size:var(--text-xs);text-overflow:ellipsis;white-space:nowrap;flex:1;margin-left:8px;overflow:hidden}.card-title-edit-form{flex:1;align-items:center;gap:8px;min-width:220px;display:flex}.card-title-edit-input{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-white);min-width:120px;height:28px;color:var(--color-text);font-family:var(--font-body);font-size:var(--text-xs);outline:none;flex:1;padding:.25rem .5rem}.card-title-edit-input:focus{border-color:var(--color-teal);box-shadow:0 0 0 2px #0d6e6e1f}.slide-check-label{cursor:pointer;font-size:var(--text-xs);color:var(--color-muted);-webkit-user-select:none;user-select:none;align-items:center;gap:6px;margin-left:auto;display:flex}.slide-check-label 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var(--color-divider);margin-bottom:1rem;padding-bottom:.75rem}[data-theme=dark] .slide-title{color:#a5b4d4}.text-block{line-height:var(--leading-loose);font-size:var(--text-base);color:var(--color-text-2);margin-bottom:.5rem}.text-block p{margin:3px 0}.bullet-item{line-height:var(--leading-relaxed);font-size:var(--text-base);color:var(--color-text-2);align-items:baseline;gap:8px;margin:3px 0;display:flex}.bullet-marker{color:var(--color-red-mid);min-width:14px;font-size:.85em;line-height:inherit;flex-shrink:0}.num-marker{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-navy);font-weight:var(--weight-semibold);min-width:20px}[data-theme=dark] .num-marker{color:#a5b4d4}.bullet-text{flex:1}.image-block{text-align:center;margin:1rem 0}.image-block img{border-radius:var(--radius-lg);object-fit:contain;border:1px solid var(--color-divider);max-width:100%;max-height:480px;box-shadow:0 2px 12px #0000001a}.table-wrap{border-radius:var(--radius-base);border:1px solid var(--color-border);margin:1rem 0;overflow-x:auto}.table-wrap table{border-collapse:collapse;table-layout:fixed;width:100%}.table-wrap th{font-size:var(--text-2xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-wide);text-transform:uppercase;color:var(--color-muted);background:var(--color-page-bg);border-bottom:2px solid var(--color-divider);text-align:left;padding:.6rem .75rem}.table-wrap td{font-size:var(--text-base);line-height:var(--leading-normal);color:var(--color-text-2);border-bottom:1px solid var(--color-divider);padding:.55rem .75rem}.table-wrap td:first-child{font-weight:var(--weight-medium);color:var(--color-text)}.table-wrap tr:last-child td{border-bottom:none}.table-wrap tr:nth-child(2n) td{background:#fafaf9}@media print{.sidebar,.sidebar-toggle,.sidebar-overlay,.mobile-progress-bar,.toolbar,.card-header .slide-check-label,.nav-item-check{display:none!important}body{background:#fff}.main{max-width:100%;margin-left:0;padding:1rem}.slide-card{box-shadow:none;break-inside:avoid;border:1px solid #ddd}.hero{-webkit-print-color-adjust:exact;print-color-adjust:exact;background:#1b2a4a!important}.hero h1,.hero-sub,.hero-label{-webkit-print-color-adjust:exact;color:#fff!important}}@media (max-width:1024px){.main{max-width:100%;padding:1.75rem 2rem 4rem}.image-block img{max-height:400px}.slide-title{font-size:1.2rem}}@media (max-width:768px){:root{--sidebar-w:0px}.sidebar-toggle{display:flex}.sidebar{width:260px;transform:translate(-100%)}.sidebar.open{transform:translate(0);box-shadow:4px 0 24px #0000004d}.mobile-progress-bar{display:block}.main{margin-left:0;padding:1.25rem 1rem 3rem}.hero{padding:3.5rem 1.25rem 1.5rem}.hero h1{font-size:1.4rem}.hero-label{font-size:9px}.hero-sub{font-size:var(--text-sm)}.toolbar{margin-top:.5rem}.card-header{flex-wrap:wrap;padding:.55rem 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