@import "https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap";*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f5f3ee;--bg2:#eceae3;--surface:#fff;--border:#00000012;--text:#1a1814;--text2:#6b6760;--text3:#9e9b96;--accent:#e07b2a;--accent2:#f59e0b;--accent-soft:#e07b2a1a;--accent-soft2:#e07b2a0f;--green:#2ea87e;--blue:#3b7dd8;--radius:16px;--radius-sm:10px;--shadow:0 1px 3px #0000000f, 0 4px 16px #0000000f;--shadow-md:0 2px 8px #00000014, 0 8px 30px #00000014;--shadow-lg:0 8px 30px #0000001f}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:DM Sans,sans-serif}.app{flex-direction:column;min-height:100vh;display:flex}.navbar{-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:200;background:#f5f3eee6;justify-content:space-between;align-items:center;height:64px;padding:0 40px;display:flex;position:sticky;top:0}.nav-logo{color:var(--text);cursor:pointer;flex-shrink:0;align-items:center;gap:9px;font-family:Sora,sans-serif;font-size:19px;font-weight:700;display:flex}.nav-logo .logo-icon{background:var(--accent);border-radius:9px;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.nav-logo .logo-icon svg{width:18px;height:18px}.nav-right{align-items:center;gap:6px;display:flex}.nav-link{color:var(--text2);cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;border-radius:8px;align-items:center;gap:4px;padding:7px 13px;font-size:14px;font-weight:500;transition:all .2s;display:flex}.nav-link:hover{background:var(--border);color:var(--text)}.nav-link.premium{color:#b45309;background:#f59e0b1a;border:1px solid #f59e0b40}.nav-link.premium:hover{background:#f59e0b2e}.login-btn{background:var(--text);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:8px 20px;font-family:DM Sans,sans-serif;font-size:14px;font-weight:500;transition:all .2s}.login-btn:hover{background:#2d2a25;transform:translateY(-1px)}.nav-class-picker{position:relative}.nav-class-btn{background:var(--surface);border:1.5px solid var(--border);color:var(--text);cursor:pointer;white-space:nowrap;border-radius:8px;align-items:center;gap:6px;padding:7px 13px;font-family:DM Sans,sans-serif;font-size:14px;font-weight:600;transition:all .2s;display:flex}.nav-class-btn:hover,.nav-class-btn.open{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.nav-class-btn .chevron{flex-shrink:0;transition:transform .2s}.nav-class-btn .chevron.up{transform:rotate(180deg)}.class-picker-dropdown{background:var(--surface);border:1px solid var(--border);z-index:300;border-radius:18px;min-width:340px;padding:20px;position:absolute;top:calc(100% + 10px);left:50%;transform:translate(-50%);box-shadow:0 8px 40px #00000021}.class-picker-label{letter-spacing:.07em;text-transform:uppercase;color:var(--text3);margin-bottom:14px;padding-left:2px;font-size:11px;font-weight:600}.class-picker-grid{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}@keyframes pillSlideIn{0%{opacity:0;transform:translateY(10px)scale(.95)}to{opacity:1;transform:translateY(0)scale(1)}}.class-picker-pill{border:1.5px solid var(--border);background:var(--bg);cursor:pointer;opacity:0;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:2px;padding:12px 8px;transition:border-color .18s,background .18s,transform .18s;animation:.28s forwards pillSlideIn;display:flex}.class-picker-pill:hover{border-color:var(--accent);background:var(--accent-soft);transform:translateY(-2px)}.class-picker-pill.active{border-color:var(--accent);background:var(--accent)}.class-picker-pill.active .cpp-name,.class-picker-pill.active .cpp-sub{color:#fff}.cpp-name{color:var(--text);white-space:nowrap;font-family:Sora,sans-serif;font-size:12px;font-weight:700}.cpp-sub{color:var(--text3);font-size:9px;font-weight:400}.user-area{position:relative}.user-avatar{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-family:Sora,sans-serif;font-size:14px;font-weight:700;transition:all .2s;display:flex}.user-avatar:hover{box-shadow:0 0 0 3px var(--accent-soft);transform:scale(1.08)}.user-menu{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-md);z-index:300;border-radius:14px;min-width:190px;padding:14px;animation:.2s forwards pillSlideIn;position:absolute;top:calc(100% + 10px);right:0}.user-menu-name{color:var(--text);font-family:Sora,sans-serif;font-size:14px;font-weight:700}.user-menu-email{color:var(--text3);margin-top:2px;font-size:12px}.user-menu-divider{background:var(--border);height:1px;margin:10px 0}.user-menu-item{width:100%;color:var(--text2);cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:8px;padding:8px 10px;font-family:DM Sans,sans-serif;font-size:13px;font-weight:500;transition:all .15s;display:flex}.user-menu-item:hover{background:var(--bg2);color:var(--text)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(24px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.modal-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:500;background:#14120e8c;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal-box{background:var(--surface);border:1px solid var(--border);border-radius:24px;width:100%;max-width:420px;padding:36px 40px;animation:.28s cubic-bezier(.22,1,.36,1) slideUp;position:relative;box-shadow:0 24px 80px #0000002e}.modal-close{background:var(--bg2);cursor:pointer;width:32px;height:32px;color:var(--text3);border:none;border-radius:50%;justify-content:center;align-items:center;transition:all .15s;display:flex;position:absolute;top:18px;right:18px}.modal-close:hover{background:var(--bg);color:var(--text)}.modal-close svg{width:16px;height:16px}.modal-logo{color:var(--text);align-items:center;gap:10px;margin-bottom:28px;font-family:Sora,sans-serif;font-size:20px;font-weight:800;display:flex}.modal-logo-icon{background:var(--accent);border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.modal-logo-icon svg{width:20px;height:20px}.modal-tabs{background:var(--bg2);border-radius:10px;gap:4px;margin-bottom:24px;padding:4px;display:flex}.modal-tab{color:var(--text3);cursor:pointer;background:0 0;border:none;border-radius:7px;flex:1;padding:9px;font-family:DM Sans,sans-serif;font-size:14px;font-weight:600;transition:all .2s}.modal-tab.active{background:var(--surface);color:var(--text);box-shadow:0 1px 6px #00000014}.modal-form{flex-direction:column;gap:16px;display:flex}.modal-field{flex-direction:column;gap:6px;display:flex}.modal-field label{color:var(--text2);font-size:13px;font-weight:600}.modal-field input{border:1.5px solid var(--border);background:var(--bg);color:var(--text);border-radius:10px;outline:none;padding:11px 14px;font-family:DM Sans,sans-serif;font-size:14px;transition:all .2s}.modal-field input::placeholder{color:var(--text3)}.modal-field input:focus{border-color:var(--accent);background:var(--surface);box-shadow:0 0 0 3px var(--accent-soft)}.modal-error{color:#c0392b;background:#dc3c3c14;border:1px solid #dc3c3c33;border-radius:8px;padding:10px 14px;font-size:13px}.modal-submit{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:10px;margin-top:4px;padding:13px;font-family:DM Sans,sans-serif;font-size:15px;font-weight:600;transition:all .2s;box-shadow:0 4px 14px #e07b2a59}.modal-submit:hover:not(:disabled){background:#cc6e22;transform:translateY(-1px)}.modal-submit:disabled{opacity:.6;cursor:not-allowed}.modal-switch{text-align:center;color:var(--text3);font-size:13px}.modal-switch span{color:var(--accent);cursor:pointer;font-weight:600}.modal-switch span:hover{text-decoration:underline}.page{width:100%;max-width:1200px;margin:0 auto;padding:0 32px 60px}.hero{grid-template-columns:1fr 420px;align-items:center;gap:48px;padding:64px 0 56px;display:grid}.hero-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border:1px solid #e07b2a33;border-radius:100px;align-items:center;gap:7px;margin-bottom:20px;padding:5px 12px;font-size:12px;font-weight:600;display:inline-flex}.hero-eyebrow span{background:var(--accent);border-radius:50%;width:6px;height:6px;display:inline-block}.hero-title{letter-spacing:-1.5px;color:var(--text);margin-bottom:18px;font-family:Sora,sans-serif;font-size:50px;font-weight:800;line-height:1.1}.hero-title em{color:var(--accent);font-style:normal}.hero-sub{color:var(--text2);max-width:420px;margin-bottom:32px;font-size:16px;font-weight:400;line-height:1.65}.hero-actions{align-items:center;gap:14px;display:flex}.btn-primary{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:10px;padding:13px 28px;font-family:DM Sans,sans-serif;font-size:15px;font-weight:600;transition:all .2s;box-shadow:0 4px 14px #e07b2a59}.btn-primary:hover{background:#cc6e22;transform:translateY(-2px);box-shadow:0 6px 20px #e07b2a73}.btn-ghost{color:var(--text2);border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:10px;align-items:center;gap:7px;padding:13px 22px;font-family:DM Sans,sans-serif;font-size:15px;font-weight:500;transition:all .2s;display:flex}.btn-ghost:hover{background:var(--surface);color:var(--text);border-color:#00000026}.hero-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-md);border-radius:20px;padding:28px;position:relative;overflow:hidden}.hero-card-top{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.hero-card-label{letter-spacing:.08em;text-transform:uppercase;color:var(--text3);font-size:11px;font-weight:600}.hero-card-badge{color:var(--green);background:#2ea87e1a;border:1px solid #2ea87e33;border-radius:100px;padding:3px 10px;font-size:11px;font-weight:600}.hero-progress-list{flex-direction:column;gap:14px;display:flex}.progress-item-top{justify-content:space-between;align-items:center;margin-bottom:7px;display:flex}.progress-item-name{color:var(--text);font-size:13px;font-weight:500}.progress-item-pct{color:var(--text2);font-size:12px;font-weight:600}.progress-bar{background:var(--bg2);border-radius:100px;height:6px;overflow:hidden}.progress-fill{border-radius:100px;height:100%;transition:width .6s}.progress-fill.orange{background:var(--accent)}.progress-fill.blue{background:var(--blue)}.progress-fill.green{background:var(--green)}.hero-card-divider{background:var(--border);height:1px;margin:18px 0}.hero-card-bottom{justify-content:space-between;display:flex}.hero-stat{text-align:center}.hero-stat-num{color:var(--text);font-family:Sora,sans-serif;font-size:22px;font-weight:700}.hero-stat-lbl{color:var(--text3);margin-top:2px;font-size:11px}.hero-card-locked{position:relative}.progress-fill-placeholder{background:var(--bg2);border-radius:100px;width:60%;height:100%}.locked-num{color:var(--text3);opacity:.5;font-size:20px}.locked-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);text-align:center;background:#f5f3eed1;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:20px;display:flex;position:absolute;inset:0}.locked-overlay svg{color:var(--text3)}.locked-overlay p{color:var(--text2);font-size:13px;font-weight:500;line-height:1.4}.locked-overlay button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:4px;padding:9px 20px;font-family:DM Sans,sans-serif;font-size:13px;font-weight:600;transition:all .2s;box-shadow:0 3px 10px #e07b2a4d}.locked-overlay button:hover{background:#cc6e22}.stats-section{margin-bottom:48px}.stats-row{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-items:center;gap:16px;padding:22px 20px;transition:all .2s;display:flex}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-icon-wrap{border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.stat-icon-wrap.orange{background:var(--accent-soft)}.stat-icon-wrap.blue{background:#3b7dd814}.stat-icon-wrap.green{background:#2ea87e14}.stat-icon-wrap.purple{background:#8b5cf614}.stat-icon-wrap svg{width:22px;height:22px}.stat-icon-wrap.orange svg{color:var(--accent)}.stat-icon-wrap.blue svg{color:var(--blue)}.stat-icon-wrap.green svg{color:var(--green)}.stat-icon-wrap.purple svg{color:#8b5cf6}.stat-num{color:var(--text);font-family:Sora,sans-serif;font-size:22px;font-weight:700}.stat-lbl{color:var(--text3);margin-top:1px;font-size:12px}.section-header{justify-content:space-between;align-items:baseline;margin-bottom:20px;display:flex}.section-title{color:var(--text);font-family:Sora,sans-serif;font-size:20px;font-weight:700}.section-link{color:var(--accent);cursor:pointer;font-size:13px;font-weight:500}.section-link:hover{text-decoration:underline}.class-section{margin-bottom:48px;scroll-margin-top:80px}.class-grid{grid-template-columns:repeat(7,1fr);gap:10px;display:grid}.class-pill{background:var(--surface);border:1.5px solid var(--border);text-align:center;cursor:pointer;border-radius:12px;padding:14px 10px;transition:all .18s;position:relative;overflow:hidden}.class-pill:before{content:"";background:var(--accent);opacity:0;transition:opacity .18s;position:absolute;inset:0}.class-pill:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 4px 16px #e07b2a1f}.class-pill:hover:before{opacity:.05}.class-pill.active{border-color:var(--accent);background:var(--accent)}.class-pill.active .class-pill-name,.class-pill.active .class-pill-sub{color:#fff}.class-pill-name{color:var(--text);font-family:Sora,sans-serif;font-size:13px;font-weight:700;position:relative}.class-pill-sub{color:var(--text3);margin-top:2px;font-size:10px;font-weight:400;position:relative}.class-pill.active .class-pill-sub{color:#ffffffbf}.explorer-section{margin-bottom:48px}.explorer-grid{grid-template-columns:260px 1fr;align-items:start;gap:16px;display:grid}.lesson-list{flex-direction:column;gap:6px;display:flex}.lesson-item{cursor:pointer;border:1.5px solid #0000;border-radius:12px;align-items:center;gap:12px;padding:13px 16px;transition:all .18s;display:flex}.lesson-item:hover{background:var(--surface);border-color:var(--border)}.lesson-item.active{background:var(--surface);border-color:var(--accent);box-shadow:var(--shadow)}.lesson-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.lesson-name{color:var(--text2);flex:1;font-size:14px;font-weight:500}.lesson-item.active .lesson-name{color:var(--text);font-weight:600}.lesson-count{color:var(--text3);background:var(--bg2);border-radius:100px;padding:2px 8px;font-size:11px;font-weight:600}.subject-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.subject-chip{background:var(--surface);border:1.5px solid var(--border);cursor:pointer;border-radius:12px;align-items:flex-start;gap:10px;padding:16px;transition:all .18s;display:flex}.subject-chip:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:0 4px 16px #e07b2a1a}.subject-chip-num{color:var(--accent);background:var(--accent-soft);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;margin-top:1px;font-family:Sora,sans-serif;font-size:11px;font-weight:700;display:flex}.subject-chip-text{color:var(--text);font-size:13px;font-weight:500;line-height:1.4}.detail-page{padding:40px 0}.breadcrumb{align-items:center;gap:8px;margin-bottom:32px;display:flex}.breadcrumb-item{color:var(--text3);cursor:pointer;font-size:13px;transition:color .15s}.breadcrumb-item:hover{color:var(--text)}.breadcrumb-sep{color:var(--text3);font-size:13px}.breadcrumb-item.current{color:var(--text);cursor:default;font-weight:500}.detail-layout{grid-template-columns:1fr 320px;align-items:start;gap:24px;display:grid}.detail-badge{letter-spacing:.06em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border:1px solid #e07b2a33;border-radius:100px;align-items:center;gap:7px;margin-bottom:14px;padding:5px 12px;font-size:11px;font-weight:600;display:inline-flex}.detail-title{letter-spacing:-1px;color:var(--text);margin-bottom:8px;font-family:Sora,sans-serif;font-size:38px;font-weight:800;line-height:1.15}.detail-meta{color:var(--text3);margin-bottom:28px;font-size:14px}.detail-meta span{color:var(--accent);font-weight:500}.ai-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:18px;margin-bottom:16px;padding:28px}.ai-card-header{align-items:center;gap:10px;margin-bottom:18px;display:flex}.ai-card-icon{background:var(--accent-soft);border:1px solid #e07b2a33;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;display:flex}.ai-card-icon svg{width:20px;height:20px;color:var(--accent)}.ai-card-title{font-family:Sora,sans-serif;font-size:16px;font-weight:700}.ai-card-sub{color:var(--text3);font-size:12px}.ai-card-body{color:var(--text2);font-size:15px;line-height:1.75}.ai-card-body p{margin-bottom:12px}.ai-card-body p:last-child{margin-bottom:0}.ai-tip{background:var(--accent-soft2);color:var(--text2);border:1px solid #e07b2a1f;border-radius:10px;align-items:flex-start;gap:10px;margin-top:16px;padding:14px 16px;font-size:13px;display:flex}.ai-tip-icon{flex-shrink:0;font-size:16px}.detail-sidebar{flex-direction:column;gap:14px;display:flex}.sidebar-card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;padding:22px}.sidebar-card-title{margin-bottom:14px;font-family:Sora,sans-serif;font-size:14px;font-weight:700}.action-btn{cursor:pointer;border:none;border-radius:10px;justify-content:center;align-items:center;gap:10px;width:100%;margin-bottom:8px;padding:13px 18px;font-family:DM Sans,sans-serif;font-size:14px;font-weight:600;transition:all .2s;display:flex}.action-btn:last-child{margin-bottom:0}.action-btn.primary{background:var(--accent);color:#fff;box-shadow:0 4px 12px #e07b2a4d}.action-btn.primary:hover{background:#cc6e22;transform:translateY(-1px)}.action-btn.secondary{background:var(--bg2);color:var(--text)}.action-btn.secondary:hover{background:var(--border)}.action-btn svg{width:18px;height:18px}.detail-quick-stats{grid-template-columns:1fr 1fr;gap:8px;display:grid}.dqs-item{background:var(--bg);text-align:center;border-radius:10px;padding:12px}.dqs-num{color:var(--text);font-family:Sora,sans-serif;font-size:20px;font-weight:700}.dqs-lbl{color:var(--text3);margin-top:2px;font-size:10px;font-weight:500}.features-section{margin-bottom:48px}.features-grid{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;transition:all .2s}.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}.feature-icon-wrap{border-radius:12px;justify-content:center;align-items:center;width:42px;height:42px;margin-bottom:14px;display:flex}.feature-icon-wrap svg{width:22px;height:22px}.feature-card-title{margin-bottom:6px;font-family:Sora,sans-serif;font-size:14px;font-weight:700}.feature-card-desc{color:var(--text3);font-size:12px;line-height:1.55}@media (width<=768px){.navbar{height:56px;padding:0 16px}.nav-right{gap:4px}.nav-link,.nav-link.premium{display:none}.nav-class-btn{padding:6px 10px;font-size:12px}.login-btn{padding:7px 14px;font-size:13px}.page{padding:0 16px 40px}.hero{grid-template-columns:1fr;gap:32px;padding:32px 0 40px}.hero-title{letter-spacing:-.5px;font-size:32px}.hero-sub{font-size:14px}.hero-actions{flex-direction:column;align-items:stretch}.btn-primary,.btn-ghost{text-align:center;justify-content:center}.stats-row{grid-template-columns:1fr 1fr;gap:10px}.stat-card{gap:10px;padding:16px 14px}.stat-num{font-size:18px}.class-grid{grid-template-columns:repeat(4,1fr);gap:8px}.class-pill{padding:10px 6px}.class-pill-name{font-size:11px}.explorer-grid{grid-template-columns:1fr}.lesson-list{flex-flow:wrap;gap:6px}.lesson-item{padding:8px 12px}.subject-grid{grid-template-columns:1fr 1fr}.features-grid{grid-template-columns:1fr 1fr;gap:10px}.detail-layout{grid-template-columns:1fr}.detail-title{font-size:26px}.modal-box{margin:0 12px;padding:24px 20px}.class-picker-dropdown{min-width:280px;left:auto;right:0;transform:none}.class-picker-grid{grid-template-columns:repeat(3,1fr)}}@media (width<=480px){.class-grid{grid-template-columns:repeat(3,1fr)}.features-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:1fr 1fr}.hero-title{font-size:28px}.subject-grid{grid-template-columns:1fr}}.hamburger-btn{cursor:pointer;color:var(--text);background:0 0;border:none;border-radius:8px;padding:6px;transition:background .2s;display:none}.hamburger-btn:hover{background:var(--bg2)}.mobile-menu{background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);z-index:199;flex-direction:column;padding:12px 0;display:flex;position:fixed;top:56px;left:0;right:0}.mobile-menu-item{color:var(--text);cursor:pointer;border-bottom:1px solid var(--border);padding:14px 24px;font-size:15px;font-weight:500;transition:background .15s}.mobile-menu-item:last-child{border-bottom:none}.mobile-menu-item:hover{background:var(--bg2)}@media (width<=768px){.hamburger-btn{display:flex}.nav-right .nav-link,.nav-right .nav-link.premium,.nav-right .login-btn,.nav-right .user-avatar{display:none}}.mobile-menu{animation:.25s cubic-bezier(.22,1,.36,1) slideInLeft;background:var(--surface)!important;border-right:1px solid var(--border)!important;z-index:999!important;border-bottom:none!important;flex-direction:column!important;width:72%!important;max-width:300px!important;padding:0!important;display:flex!important;position:fixed!important;inset:0 auto 0 0!important;box-shadow:4px 0 30px #0000001f!important}.mobile-menu-overlay{z-index:998;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0000004d;animation:.2s fadeIn;position:fixed;inset:0}@keyframes slideInLeft{0%{opacity:0;transform:translate(-100%)}to{opacity:1;transform:translate(0)}}.mobile-menu-header{border-bottom:1px solid var(--border);align-items:center;gap:9px;padding:24px 20px 20px;display:flex}.mobile-menu-logo{background:var(--accent);border-radius:8px;justify-content:center;align-items:center;width:30px;height:30px;display:flex}.mobile-menu-logo svg{width:16px;height:16px}.mobile-menu-brand{color:var(--text);font-family:Sora,sans-serif;font-size:17px;font-weight:700}.mobile-menu-section{letter-spacing:.08em;text-transform:uppercase;color:var(--text3);padding:12px 12px 4px;font-size:10px;font-weight:600}.mobile-menu-item{cursor:pointer;border-radius:10px;align-items:center;gap:10px;margin:2px 8px;transition:all .15s;color:var(--text2)!important;border-bottom:none!important;padding:12px 16px!important;font-size:14px!important;font-weight:500!important;display:flex!important}.mobile-menu-item:hover{background:var(--bg2)!important;color:var(--text)!important}.mobile-menu-item.accent{color:var(--accent)!important}.mobile-menu-item.danger{color:#c0392b!important}.mobile-menu-divider{background:var(--border);height:1px;margin:8px 16px}.mobile-menu-footer{border-top:1px solid var(--border);margin-top:auto;padding:16px}.mobile-menu-user{background:var(--bg);border-radius:10px;align-items:center;gap:10px;padding:10px 12px;display:flex}.mobile-menu-avatar{background:var(--accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-family:Sora,sans-serif;font-size:13px;font-weight:700;display:flex}.mobile-menu-username{color:var(--text);font-size:13px;font-weight:600}.mobile-menu-email{color:var(--text3);font-size:11px}@media (width<=768px){.hamburger-btn{align-items:center;margin-left:auto;display:flex!important}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,d09GMgABAAAAAA4oAA4AAAAAHbQAAA3TAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAABmAAgRQIDgmcDBEICo1oijYBNgIkA14LMgAEIAWJAAeBHAyBHBvbGiMRdnO0IkRRkiYDgr9KsJ1NUAf2kILNxgUmgqIgq1P89vcbIcmsQbRps3vCcXdYOKSWEPEKgZgQkprQQsxIXUgq0DqpGKmIvrgkeVGtEQD9DzAO29fM9jYhxZEsL2FeURH2JN4MIcTdO049NCVdxQ/w9NrSYFEBKTDKpLKfNkCGDc1RwjZLQcm3vqJ2UW9Xfa3tgAHz6ivp6vgC2yD4/6352ndnN0X0TL7seypkjZlMsjmZnf0Mm5Q+JykRWQBKCVCVPbARPXWyQtb5VgLB6Biq7/Uixcj2WGqdI8tGSgkuRG+t910GKP2D7AQH0DB9FMDW/obJZ8giFI3Wg8Cvevz0M+5m0rTh7XDBlvo9Y4vm13EXmfttwI4mBo1EG15fxJhUiCLbiiyCf/ZA6MFAhg3pGIZGdGIVjtPn6UcMk9A/UUr9PhoNsCENw1APAq0gpH73e+M+0ueyHbabc3vkbcdtzcf/fiy+NxQEjf9ud/ELBHAXJ0nk4z+MXH2Ev/kWyV4k7SkvpPc9Qr38F6RPWnM9cN6DJ0AdD1BhtgABtmoRoFCvPsBAumNm6soZG2Gk5GyVTo2sJncSyp0jQTYoR6WDvTwaaEcHsxHfvuWhHA3a6bN7twRKtcGok6NsCi7jYRrM2jExsUFMxMQYuJbMhuWNOumEJy9hi29Dmg5zMp/A5+hhPG19j1vBrq8JTLr8ki5VLPmG/PynJHVul440bxg5xuymHUFPBshC+nA9I1FmwbRBTNHAcik3Oae0cxKoI3MOriM42UrPe51nsaGxJ+WfXubAsP84aabUlQSJ1IiE0iPETLUU4CATgfXSCSpuRFRmCGbO+wSpAnzaeaCYW1VNEysRtuXCEL1kUFUbbtMv3Tilt/1c11jt3Q5bbMa84cpWipp8Elw3MZhOHsOlwwVUQM3lAR35JiFQbaYCRnMF2lxAWoOg2gyoIV4PouX8HytNIfLhqpJtXB4vjiViUI8IJ7bkC4ikkQvKksnOTKICwnqWSZ9YS5f0WCxmpgjbIq7EJcM4aI2nmhLNY2JIUgOjXZFWBHb+x5oh6cwb0Tv1ackHdKi0I9OO2wE9aogIOn540CCCziyhN+IaejtgAONKznHlHyutPrHGwCx9S6B8kfS4Mfi4Eyv7OU730bT1SCBjt834cXsf43zVjPUqqJjgrjeGnBxSG4aYAKFuVbeCfkDIjAqMb6yLNIbCuvXhMH2/+k2vkNpkORhR59N1CkzoOENvneIosjYmuTxlhUzaGEJQ/iWqx4dmwpmKjrwTiTGTCVozNAYqk/zXOndWxuWSmJkQpJw3pK5KX6QrLt5LATMqpmPAQhkhK6PUjzHUn7E0gHE0kPE0iKkolgkUx9SZmVAdDgpffdyJKg3k7VmzYGCwVXGz/tXmkOIp+vcWs+EMuhhvN0h9uhfzWJziBQmCREGSIFmQIkgVpAnSBRmC//6hkLZwaVhwxlrJSOdqlFtOYxlau9F2QN5Y98xmIAsiM1HVp2VFX+DHHGg6Ecjh3vmqtidX3qHI2qycTk/iwxSt5UzTmEP92ZBnEWTk4Mx8Mpl78ZDokxg/KWb+Q0QkvdKVmq3TMW+RXEgrsziSAfNXFMhDc60N5N9jQzjfO0kBKpUZl0ZmwJ41j/B9Hz6wmRaJB84niNmQrzp9eSlQCDDzazGDdVi3P36VZQ+Jy4f9UBNp+3zTjqI4abaFAm+GShVaXlsGdF3FYzZcDI6cori4kMxUECl9IjJZpzkvitAoxKue+90pDMvcKRxLl53TmOKCmV/xRolNKSqqUxc6LStOETmFOiLZZptlZepcKiAzteG8PEdpnQpbOMNcMsR4RR2Bs0cKFEvSmIjAFcnarqwUL4lDhHmnVkwu1IwshbiCcgvOheZuYyOteufZZwlcTlLgnZ3o/WcYdzZHW/WGaqaVfmTZ1aWCceJjkbZqsfbkOtcFlUZM/jy+hXHDbaUobWqqXaeWobbLO99yG5N3U4wxco0rQGGcOLASFMXeJoham8M+/x6O2WywK2l4HGbq1CoUyC/IZikQhdq3SiuNrvAEj0AVu9x2x3lp/xWzahaxidezFVtdcb5uEnzyl0ZmYiuKI0exvCd4Xc9CV1KB0db00z92wDPde0kukbvZIWN6jUWFTmPIC/Y4UPCm8UfDTFZpZNon1qLFTkBhxzB+FjQRA2Q/YRJT8pQigslMaUpFyAG8TMlXigiqmAZX4xgijKjRlGpLE0GdplRfCaJo0JQaSxNBk6ZmMzcya0FmrcisDdn0Q3HI2sWSppYigmlM1XT/kLQZSNpMJG0WkjYbSZuDpM1F0uYhFc1HxU4m1QJjDK6iL0S5uSj5rgXc3RejEigtcRBtqYPQsiTskmO5vosV+q4VGIKbOkDg0jtRrq+Em1YloaTFar3EGr1EUC8R0kus1Uus00usL97ABr2BjXoDm/QGNhuWtMVBKOwg/i78lT7hBsAvDmwHc/ao3vmUbBmhjeYySZNWvGkfZAgISDSaDo1SVpzGDsAEkF8B+gEapViUoZgUWXcRIGFZNm6gWbAKk0bp0k1MHG9fLYtV4iS2SmLEQFARzRcnf9PUS0LVn05/J9MiRRBU3v2IrvW974v4N00L7ZMk0wXP1409CHo/an8zTRHD3eSJ6m8D4YMkZNl3M79sqeuAsr/m3f+8/yl7A50aiAEJgeBeMWzu7ui9UfUBCe2TIqZIoOd/3/udRBOQidQZUERzb2/VwZN1H/Sju82ew2H2Wfr6qvfVf3hqwDvAIpkQVFy4B9Pe9e4/XvPeceu7h3dvO56iJPf0+A6cqA2ip18ER+iFgggiuOkvj24bby0N9j2UHIkgqIt+sVgfodC4YghLSMjSZbH0VR/6dMDrYJeKHilKTemt6v6kvzvn3/RrdWtr0GoN/xL+Sex/cPYLUpepx9cz/D46UPU5KXgAQa+NDps1v6J3xP1i2HtaDB0M9aX2deA7SYff//+gUCovMmIK/qfsFcOk+4Y5ZN97XlG6zebqtMbKgeRFi51vnxTQYBUik2rS/Cn6PC8ADR8FGxsRPB82dzfND90gIcshOcYUkfjherBz53odpm6TP8txlwOZ71xmfHHOvq053qFF/MRlS3jP0ELudrf2OeN8DHvp6ZceLe8qKYvWz/7yp0u4dKPfli3CYq0O13Ih71mylJ80tOi10On8wi+F4+LWgDPeJ30msSQt9/vkmHq9/Lvo2b461mP801v3W4xTcs6CbvF9UDdrSt+A8OUbpSh55qAUFXWznBBfdeJ8a4d7ugT5tvxUza3h9m4H7ptTqiG4z0g5dc0X29OcGlhpGFMpQo9ytTS+NViZpNdvU4kWx+LKxNY10kQ1yqGXrhe4/1nvP7E+nd5A92TtaRplbHSqoIdOqtRWti+fkB5/n1+/VvCmz12pG1kpQWsfi1ftlBobm0bpngs16CHkbIwdLnParxtTV3QYRlfJ0KFskH7pdN/YDn+yRuSd7sNH3aO0DYPggk6uWuXrfOc+fa3VTxFVvKaNxHsiHmsXyCLIE5yuOeN3/Jdf8HBL/5M6shjyhxHx9BjB1O0+4NLOnjLLSxwO7ukN4jMbOIcD879KLSi6Pk61Oqm2377n8079PXEEQ7cy7OKEC9nbpet118fxweTafpt69x/Bt8UqGzNQt7aelpc44dn5cqhwf71+qKp/Zf/+a0zcizOUWpl/iBcSXip0pplkatCchoH5c5aUM8I7/dWxAej8WicPL1URFZ9BDJelUwEwTkGqUhgSlydVes95YdXvhh9Gfz/aeFWvgVb4tuLbcv4+wLdutVZv/cUonwBD/6eDlE0aSiKK/uoH3+J1wDE/jMVqY2ysGufN84oIXB0sPzy8ollX/LegY74DgJXJR57sn+VGza0x3DnuIgABFM15LmajjjsNlYj+JEZGbuRYcAMOWxFkPN2w6Wd46xo4gVWQR/X4lyI/R6K/YK0110GzudPRW7Y+UOBGTfNNzHeYT0fiH0taunBpq9HEW8OKSaBGj21L0MqenEmNRWBAWDWAk4CpNoEZJ2tTaPFgbQYj8HxtFilErs3BTRwT8uO1NXQaWfIotchmPkAF5mMBAliEmZiOGVgCG9LgRzpscMAOOwowlT3JhusdazXGSC/hxR3UlmWVwWHpOIKheqONvjyhSiTHIkVUco5bnji8m//zL7PKaT1Vl5I6UE609f+gkr6MZKVyKc7zJRmCahLsdlyA5fdQkRSan9LgnnLEyGSkaKJCJog0wAgvepWBt80+1yKln1bMVtCljfNWDueKLsWwaEbBSfSPTEmVRsUcYYMnEjcjeyCZzBXK9E9BYBXLKjOSpUDR+nEV3TFSUdQaz+ot98QxgXwx0GQ+EEUAKB2qZPkQQ0GqFD8UPFMqyaCHM24BZmSGic9EYMagKizOw9Hz50DMrDLrqqLkTAhplMictiCAx5S3BIUQdeJeLnBy2CNtMfz6cV4u8XKoFZQesbf9YZiIERiHjaNodDW6LgcirX/mPnJIkBGDUpTBhSa0EIr38D5hCIszhCM8URGBqImoWjpvpt1ebu/v3Gl3qJfMnNM+9V+kiRFyROTPHQWOcs1dNW94/ukKMPZBvDi55i5CttdeJz84DLngLqjcdwEZ87bFFR8CIG35OAkDVN6VRDZ7aq67NteYqZ2lpT8oYB2CytoBd6VuAx4WgiAsnuj3WohG+LugzXiQRDeM3XYXlULv4dp5VFYC)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}
