:root{--bg-main:#fdfaf6;--bg-sidebar:#f5eee6;--bg-card:#fff;--bg-hover:#f1ebd9;--bg-code:#fbf6f0;--text-primary:#3d2b1f;--text-heading:#2c1a0f;--text-secondary:#6e594d;--text-muted:#9b8a7f;--accent:#d28e82;--accent-hover:#c07a6e;--border:#e6dace;--font-heading:"Playfair Display", serif;--font-body:"Inter", sans-serif;--radius-sm:6px;--radius-md:12px;--radius-lg:16px;--shadow-sm:0 4px 12px #3d2b1f0a;--shadow-md:0 8px 24px #3d2b1f14;--sidebar-width:280px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background:var(--bg-main);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border);z-index:100;height:100vh;transition:transform .3s cubic-bezier(.4,0,.2,1);position:fixed;top:0;left:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--border);text-align:center;padding:32px 24px 24px}.sidebar-title{font-family:var(--font-heading);color:var(--text-heading);letter-spacing:2px;margin-bottom:2px;font-size:22px;font-weight:700}.sidebar-subtitle{letter-spacing:3px;color:var(--text-muted);text-transform:uppercase;font-size:10px;font-weight:600}.sidebar-nav{padding:16px 12px}.nav-link{color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:10px;margin-bottom:2px;padding:9px 12px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-link:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-link.active{color:var(--accent);background:#d28e8226;font-weight:600}.nav-icon{text-align:center;flex-shrink:0;width:22px}.nav-label{white-space:normal;line-height:1.4;display:block}.nav-sub{color:var(--text-muted);opacity:.85;padding-left:32px;font-size:11px}.nav-sub:hover{opacity:1}.main-content{margin-left:var(--sidebar-width);min-height:100vh;padding:48px 56px 80px}.hero{text-align:center;border-bottom:1px solid var(--border);margin-bottom:56px;padding:32px 0 48px}.hero-title{font-family:var(--font-heading);color:var(--text-heading);margin-bottom:12px;font-size:40px;font-style:italic}.hero-tagline{color:var(--text-secondary);margin-bottom:8px;font-size:17px}.hero-author{font-family:var(--font-heading);color:var(--accent);margin-bottom:24px;font-size:20px;font-weight:600}.hero-stats{justify-content:center;gap:40px;display:flex}.hero-stat{text-align:center}.hero-stat-num{font-family:var(--font-heading);color:var(--text-heading);font-size:32px;font-weight:700;display:block}.hero-stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-size:12px}.teacher-card{border:1px solid var(--border);border-radius:var(--radius-lg);background:linear-gradient(135deg,#d28e8214,#b76e790f);padding:40px}.teacher-name{font-family:var(--font-heading);color:var(--accent);margin-bottom:4px;font-size:28px;font-weight:700}.teacher-role{color:var(--text-muted);text-transform:uppercase;letter-spacing:2px;margin-bottom:20px;font-size:14px;font-weight:600}.teacher-bio{color:var(--text-secondary);margin-bottom:16px;font-size:15px;line-height:1.9}.teacher-bio strong{color:var(--accent);font-weight:700}.teacher-highlights{border-top:1px solid var(--border);gap:32px;margin-top:28px;padding-top:24px;display:flex}.teacher-highlight{text-align:center}.highlight-num{font-family:var(--font-heading);color:var(--text-heading);font-size:28px;font-weight:700;display:block}.highlight-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-size:12px}.section{margin-bottom:72px}.chapter-header{align-items:center;gap:16px;margin-bottom:12px;display:flex}.chapter-num{font-family:var(--font-heading);color:#fff;background:var(--accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;font-weight:700;display:flex}.section-title{font-family:var(--font-heading);color:var(--text-heading);font-size:26px;font-weight:600}.section-divider{background:var(--accent);border-radius:2px;width:40px;height:3px;margin-bottom:20px}.section-body-row{align-items:flex-start;gap:32px;display:flex}.section-body-left{flex:2;min-width:0}.section-body-right{flex-direction:column;flex:1;gap:16px;display:flex}.section-body-right 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button{flex:1}.toggle-password{cursor:pointer;opacity:.6;-webkit-user-select:none;user-select:none;position:absolute;top:50%;right:16px;transform:translateY(-50%)}.toggle-password:hover{opacity:1}.login-form input:read-only{color:#888;background:#222;border-color:#333}@media (width<=960px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0;padding:80px 24px 40px}.mobile-menu-btn{display:flex}.sidebar-overlay.open{opacity:1;display:block}.section-body-row{flex-direction:column}.section-body-right .section-image{max-height:320px}}@media (width<=768px){.hero-title{font-size:30px}.hero-tagline{font-size:15px}.hero-author{font-size:17px}.hero-stats{gap:24px}.hero-stat-num{font-size:26px}.section-title{font-size:22px}.chapter-num{width:30px;height:30px;font-size:12px}.info-card{padding:16px}.section-body-right .section-image{max-height:260px}}@media (width<=480px){.main-content{padding:72px 16px 32px}.hero-title{font-size:26px}.hero-tagline{font-size:14px}.section-title{font-size:20px}.section-body-right .section-image{border-radius:var(--radius-md);max-height:200px}.info-card-title{font-size:15px}.info-card-desc,.styled-list{font-size:13px}}.sidebar-view-toggle{background:#2c1a0f0f;border:1px solid #2c1a0f14;border-radius:20px;margin:15px 12px 0;padding:3px;display:flex}.view-toggle-btn{color:var(--text-secondary);font-family:var(--font-body);cursor:pointer;text-transform:uppercase;letter-spacing:.5px;background:0 0;border:none;border-radius:17px;flex:1;justify-content:center;align-items:center;gap:6px;padding:8px 10px;font-size:11px;font-weight:600;transition:all .25s cubic-bezier(.4,0,.2,1);display:flex}.view-toggle-btn i{font-size:11px}.view-toggle-btn.active{background:var(--bg-card);color:var(--accent);box-shadow:0 2px 8px #2c1a0f14}.sidebar.collapsed .sidebar-view-toggle{border-radius:8px;flex-direction:column;margin:10px 4px 0}.sidebar.collapsed 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fadeIn;display:none}.course-wrapper:not(#course-contract){background:#fff;border:1px solid #b8956438;border-radius:8px;max-width:850px;margin:15px auto 35px;padding:45px 55px;transition:all .3s;position:relative;box-shadow:0 10px 40px #b895640a}@media (width<=768px){.course-wrapper:not(#course-contract){margin-bottom:25px;padding:30px 20px}}.course-wrapper.active{display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.course-header{text-align:center;margin-bottom:5px}.course-title{font-family:var(--font-heading);color:var(--text-primary);text-transform:uppercase;letter-spacing:1px;font-size:2rem;font-weight:700;line-height:1.3}.course-subtitle{font-family:var(--font-heading);color:var(--text-muted);margin-top:6px;font-size:1.05rem;font-style:italic}.info-box{background:#fff;border:2px solid #b8956459;border-radius:12px;margin-top:15px;padding:22px 26px 18px;position:relative;box-shadow:0 10px 30px #b895640d}.info-box-title{color:var(--text-primary);letter-spacing:1px;text-transform:uppercase;white-space:nowrap;background:#fdfaf6;border:1px solid #b8956459;border-radius:4px;padding:4px 20px;font-size:.8rem;font-weight:600;position:absolute;top:0;left:50%;transform:translate(-50%,-50%)}.info-box-price{font-family:var(--font-heading);color:var(--accent);text-align:center;letter-spacing:.5px;margin-bottom:12px;font-size:1.85rem;font-weight:700}.info-list{flex-direction:column;gap:8px;list-style:none;display:flex}.info-list li{color:var(--text-primary);padding-left:20px;font-size:.98rem;line-height:1.5;position:relative}.info-list li:before{content:"•";color:var(--accent);font-size:1.2rem;position:absolute;top:-1px;left:4px}.info-list li strong{color:var(--text-primary);font-weight:600}.roadmap-container{flex-direction:column;gap:20px;margin-top:25px;display:flex}.roadmap-section-title{font-family:var(--font-heading);color:var(--text-primary);text-transform:uppercase;letter-spacing:.5px;justify-content:center;align-items:center;gap:15px;margin-bottom:8px;font-size:1.4rem;font-weight:700;display:flex;position:relative}.roadmap-section-title:before,.roadmap-section-title:after{content:"";background:linear-gradient(90deg,#0000,#b895644d 50%,#0000);flex:1;max-width:180px;height:1px}.roadmap-grid{flex-direction:column;gap:25px;display:flex}.roadmap-section{display:block}.roadmap-section h4.roadmap-section-title{font-family:var(--font-heading);text-transform:uppercase;text-align:left;border-bottom:1px solid #b8956426;margin-bottom:10px;padding-bottom:4px;font-size:1.12rem;font-weight:600;display:block}.roadmap-section h4.roadmap-section-title:before,.roadmap-section h4.roadmap-section-title:after{display:none}.roadmap-list{flex-direction:column;gap:8px;max-width:800px;margin:0 auto;padding-left:0;list-style:none;display:flex}.roadmap-list li{color:var(--text-primary);padding-left:24px;font-size:1.08rem;line-height:1.5;transition:transform .2s;position:relative}.roadmap-list li:hover{transform:translate(2px)}.roadmap-list li:before{content:"•";color:var(--accent);font-size:1.3rem;position:absolute;top:-3px;left:6px}.action-container{z-index:30;flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;margin:35px 0 15px;display:flex;position:relative}.btn-download{background:var(--accent);color:#fff;letter-spacing:1px;text-transform:uppercase;cursor:pointer;border:none;border-radius:4px;align-items:center;gap:10px;padding:14px 40px;font-size:1rem;font-weight:600;transition:all .3s;display:flex;box-shadow:0 6px 20px #b8956433}.btn-download:hover{background:#a38153;transform:translateY(-2px);box-shadow:0 10px 25px #b8956459}.btn-download:active{transform:translateY(0)}.btn-contract{color:var(--accent);letter-spacing:1.2px;text-transform:uppercase;cursor:pointer;background:#fff;border:2px solid #b895642e;border-radius:4px;align-items:center;gap:10px;padding:12px 38px;font-size:1rem;font-weight:600;transition:all .3s;display:flex;box-shadow:0 4px 15px #b895640d}.btn-contract:hover{border-color:var(--accent);background:#fbf9f4;transform:translateY(-2px);box-shadow:0 8px 20px #b895641f}.btn-contract:active{transform:translateY(0)}.poster-wrapper{width:1200px;height:1720px;color:var(--text-primary);font-family:var(--font-body);box-sizing:border-box;border:2px solid var(--border);background-color:#fcfaf5;background-image:radial-gradient(circle,#fff 0%,#fcfaf5 100%);flex-direction:column;justify-content:space-between;padding:70px 75px;display:flex;position:absolute;top:-9999px;left:-9999px;overflow:hidden}.poster-frame{border:1px solid var(--border);pointer-events:none;position:absolute;inset:22px}.poster-frame-inner{border:2px solid var(--border);opacity:.45;position:absolute;inset:5px}.poster-header{text-align:center;margin-top:10px;margin-bottom:30px}.poster-logo{object-fit:contain;height:52px;margin-bottom:24px}.poster-title{font-family:var(--font-heading);color:var(--text-heading);letter-spacing:3px;text-transform:uppercase;margin-bottom:12px;font-size:2.5rem;font-weight:700}.poster-subtitle{color:var(--text-muted);font-size:1.1rem;font-style:italic}.poster-body{flex-direction:column;flex-grow:1;justify-content:flex-start;gap:25px;display:flex}.poster-info-box{background:#fff;border:2px solid #b8956459;border-radius:12px;margin-top:15px;padding:35px 45px 25px;position:relative;box-shadow:0 10px 30px #b8956408}.poster-info-box-title{font-family:var(--font-heading);color:var(--text-heading);letter-spacing:1px;text-transform:uppercase;white-space:nowrap;background:#fdfaf6;border:1px solid #b8956459;border-radius:4px;padding:4px 24px;font-size:.95rem;font-weight:600;position:absolute;top:0;left:50%;transform:translate(-50%,-50%)}.poster-info-box-price{color:var(--accent);letter-spacing:1px;font-size:1.95rem;font-weight:700;font-family:var(--font-heading);text-align:center;margin-top:10px;margin-bottom:20px}.poster-info-list{flex-direction:column;gap:12px;padding-left:0;list-style:none;display:flex}.poster-info-list li{color:var(--text-secondary);text-align:left;padding-left:25px;font-size:1.05rem;line-height:1.5;position:relative}.poster-info-list li:before{content:"•";color:var(--accent);font-size:1.4rem;position:absolute;top:-2px;left:6px}.poster-info-list li strong{color:var(--text-heading)}.poster-roadmap{background:0 0;border:none;border-radius:0;padding:0}.poster-roadmap-header{font-family:var(--font-heading);color:var(--text-heading);letter-spacing:1px;text-align:center;border-bottom:none;justify-content:center;align-items:center;gap:15px;margin-bottom:30px;padding-bottom:0;font-size:1.6rem;font-weight:600;display:flex}.poster-roadmap-header:before,.poster-roadmap-header:after{content:"";background:linear-gradient(90deg,#0000,#b8956473 50%,#0000);flex:1;max-width:180px;height:1px}.poster-roadmap-grid{flex-direction:column;gap:20px;display:flex}.poster-roadmap-node{text-align:left;margin-bottom:5px}.poster-roadmap-node-title{font-family:var(--font-heading);color:var(--text-heading);text-align:left;border-bottom:1px solid #b8956426;margin-bottom:12px;padding-bottom:6px;font-size:1.15rem;font-weight:700}.poster-roadmap-list{flex-direction:column;gap:8px;padding-left:0;list-style:none;display:flex}.poster-roadmap-list 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