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.18s,transform .18s,box-shadow .2s;display:flex}.mobile-menu-trigger:hover{background:#e8eef4;border-color:#64748b61;transform:translateY(-1px);box-shadow:0 7px 16px #4755691a}.mobile-menu-trigger:active{background:#dbe4ed;transform:scale(.96)}.mobile-menu-trigger span{background:currentColor;border-radius:2px;width:16px;height:1.5px;display:block}.mobile-menu-layer{z-index:100;display:block;position:fixed;inset:0}.mobile-menu-backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0f172a52;border:0;width:100%;height:100%;animation:.22s both mobile-menu-fade;position:absolute;inset:0}.mobile-menu-drawer{width:min(86vw,340px);padding:calc(18px + env(safe-area-inset-top)) 18px calc(18px + env(safe-area-inset-bottom));background:var(--surface-solid);border-right:1px solid var(--border);flex-direction:column;animation:.3s cubic-bezier(.2,.8,.2,1) both mobile-drawer-in;display:flex;position:absolute;top:0;bottom:0;left:0;box-shadow:18px 0 55px #0f172a2e}.mobile-menu-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;padding-bottom:22px;display:flex}.mobile-menu-brand{color:var(--text);align-items:center;gap:10px;text-decoration:none;display:flex}.mobile-menu-brand>span:last-child{flex-direction:column;gap:2px;display:flex}.mobile-menu-brand strong{letter-spacing:.22em;font-size:13px}.mobile-menu-brand small{color:var(--muted);font-size:8px}.mobile-menu-close{border:1px solid var(--border);width:38px;height:38px;color:var(--muted);cursor:pointer;background:0 0;border-radius:11px;place-items:center;font-size:24px;font-weight:300;transition:background .18s,color .18s,transform .18s;display:grid}.mobile-menu-close:hover{color:#334155;background:#e8eef4;transform:rotate(4deg)}.mobile-menu-caption{color:var(--faint);letter-spacing:.18em;text-transform:uppercase;margin:25px 10px 9px;font-size:8px;font-weight:800}.mobile-menu-nav{flex-direction:column;gap:4px;display:flex}.mobile-menu-item{min-height:51px;color:var(--muted);border:1px solid #0000;border-radius:12px;grid-template-columns:40px minmax(0,1fr) 18px;align-items:center;gap:10px;padding:0 10px;font-size:12px;font-weight:600;text-decoration:none;transition:background .18s,color .18s,border-color .18s,transform .18s;display:grid}.mobile-menu-item:hover{color:#334155;background:#e8eef4;border-color:#64748b33;transform:translate(2px)}.mobile-menu-item.is-active{color:#334155;background:#e8eef4;border-color:#64748b47}.mobile-menu-icon{background:var(--surface-soft);color:#64748b;border-radius:9px;place-items:center;width:34px;height:34px;display:grid}.mobile-menu-arrow{color:var(--faint);justify-self:end;transition:transform .18s,color .18s}.mobile-menu-item:hover .mobile-menu-arrow{color:#475569;transform:translate(2px)}.mobile-menu-footer{border-top:1px solid var(--border);margin-top:auto;padding-top:15px}.mobile-menu-footer>span{color:var(--faint);letter-spacing:.1em;margin:13px 10px 0;font-size:8px;display:block}.dashboard-sections{margin-top:24px}.dashboard-section-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.dashboard-section-link{border-radius:15px;min-height:122px;padding:15px}}@keyframes mobile-menu-fade{0%{opacity:0}to{opacity:1}}@keyframes mobile-drawer-in{0%{opacity:0;transform:translate(-24px)}to{opacity:1;transform:translate(0)}}@media (width<=480px){.dashboard-section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-section-link{min-height:116px}.dashboard-section-copy small{font-size:8px}}@media (width<=800px){.mobile-menu-trigger{z-index:2;position:relative}}button:hover,a:hover{--interaction-dark:#1c1c1b}.primary-button:hover,.dashboard-section-link:hover,.mobile-menu-item:hover,.mobile-menu-item.is-active,.nav-link.is-active,.mobile-nav-item.is-active,.catalog-filters button.is-active,.notes-filters button.is-active,.principles-notes-button.is-active{box-shadow:0 10px 24px #1c1c1b29;color:#fff!important;background:#1c1c1b!important;border-color:#1c1c1b!important}.dashboard-section-link:hover .dashboard-section-icon,.mobile-menu-item:hover .mobile-menu-icon,.mobile-menu-item.is-active .mobile-menu-icon{color:#1c1c1b;background:#fff}.dashboard-section-link:hover .dashboard-section-copy small,.dashboard-section-link:hover .dashboard-section-arrow,.mobile-menu-item:hover .mobile-menu-arrow,.mobile-menu-item.is-active .mobile-menu-arrow{color:#d8dde2}.catalog-filters button.is-active,.notes-filters button.is-active{color:#fff!important}.catalog-filters button:hover,.notes-filters button:hover,.principles-notes-button:hover{color:#fff!important;background:#1c1c1b!important;border-color:#1c1c1b!important}.catalog-opening-card .catalog-card-actions .compact-add:hover:not(:disabled),.catalog-opening-card .catalog-card-actions .catalog-favorite:hover,.catalog-opening-card .catalog-card-actions .catalog-favorite.is-active{color:#fff;background:#1c1c1b}.principle-add-note:hover,.principle-save-button:hover,.secondary-button:hover,.outline-action:hover,.search-action:hover,.icon-button:hover{color:#fff!important;background:#1c1c1b!important;border-color:#1c1c1b!important}.principle-card:hover .principle-chevron,.principle-card.is-open .principle-chevron{color:#fff;background:#1c1c1b;border-color:#1c1c1b}@media (width<=800px){.mobile-menu-layer{isolation:isolate;z-index:9999!important;position:fixed!important;inset:0!important}.mobile-menu-backdrop{z-index:0!important;position:absolute!important;inset:0!important}.mobile-menu-drawer{-webkit-overflow-scrolling:touch;overflow-y:auto;z-index:1!important;opacity:1!important;background:#fff!important;width:min(86vw,340px)!important;height:100dvh!important;position:absolute!important;top:0!important;bottom:0!important;left:0!important}.mobile-menu-head,.mobile-menu-caption,.mobile-menu-nav,.mobile-menu-footer{z-index:2;position:relative}.mobile-menu-item{-webkit-tap-highlight-color:transparent;touch-action:manipulation}.mobile-menu-item:hover:not(.is-active){color:var(--muted)!important;box-shadow:none!important;background:0 0!important;border-color:#0000!important;transform:none!important}.mobile-menu-item:hover:not(.is-active) .mobile-menu-icon{background:var(--surface-soft)!important;color:#64748b!important}.mobile-menu-item:hover:not(.is-active) .mobile-menu-arrow{color:var(--faint)!important;transform:none!important}.mobile-menu-item.is-active,.mobile-menu-item.is-active:hover{color:#fff!important;background:#1c1c1b!important;border-color:#1c1c1b!important;transform:none!important;box-shadow:0 10px 24px #1c1c1b29!important}.mobile-menu-item.is-active .mobile-menu-icon,.mobile-menu-item.is-active:hover .mobile-menu-icon{color:#1c1c1b!important;background:#fff!important}.mobile-menu-close{z-index:5;touch-action:manipulation;-webkit-tap-highlight-color:transparent;position:relative}.mobile-menu-backdrop{touch-action:manipulation;-webkit-tap-highlight-color:transparent}}@media (hover:hover) and (pointer:fine){.mobile-menu-item:hover:not(.is-active){color:#334155;background:#e8eef4;border-color:#64748b33;transform:translate(2px)}.mobile-menu-item:hover:not(.is-active) .mobile-menu-icon{color:#fff;background:#64748b}.mobile-menu-item:hover:not(.is-active) .mobile-menu-arrow{color:#475569;transform:translate(2px)}}.app-shell[data-theme=dark] .hero-card{border-color:#b0c2d229;box-shadow:0 30px 90px #00000057;background:linear-gradient(115deg,#111a22 0%,#0d151c 58%,#0b131a 100%)!important}.app-shell[data-theme=dark] .dashboard-section-link:hover{border-color:#8da0b247;background:#151f28!important}.app-shell[data-theme=dark] .secondary-button:hover,.app-shell[data-theme=dark] .icon-button:hover,.app-shell[data-theme=dark] .search-action:hover{background:#18232e;border-color:#8da0b247}.app-shell[data-theme=dark] .mobile-menu-trigger{color:#aebdca;background:#101820;border-color:#b0c2d229}.app-shell[data-theme=dark] .mobile-menu-trigger:hover{background:#18232e}.app-shell[data-theme=dark]{--bg:#0b1014;--surface:#13191fe6;--surface-solid:#12191f;--surface-soft:#1b232a;--border:#becad421;--border-strong:#becad43b;--text:#eef2f5;--muted:#a7b0b8;--faint:#77818a;--accent:#eef2f5;--accent-2:#99a6b0;--accent-soft:#99a6b017;--silver-soft:#99a6b01c;--shadow:0 30px 90px #00000061;background:radial-gradient(circle at 82% 0%,#4a5b6817,transparent 30%), radial-gradient(circle at 12% 28%,#2b394412,transparent 32%), var(--bg)}.app-shell[data-theme=dark] .hero-card{border-color:#becad426;background:linear-gradient(115deg,#131a20 0%,#10171d 58%,#0e151a 100%)!important}.app-shell[data-theme=dark] .hero-card:before{background:#66798814}.app-shell[data-theme=dark] .hero-logo-glow{box-shadow:0 0 90px #66798817;background:radial-gradient(circle,#b1bfca1a,#66798805)!important}.app-shell[data-theme=dark] .hero-orbit{border-color:#b1bfca2b}.app-shell[data-theme=dark] .dashboard-section-link:hover,.app-shell[data-theme=dark] .mobile-menu-item:hover,.app-shell[data-theme=dark] .mobile-menu-trigger:hover,.app-shell[data-theme=dark] .secondary-button:hover,.app-shell[data-theme=dark] .icon-button:hover,.app-shell[data-theme=dark] .search-action:hover{color:#10161b!important;background:#e5ebef!important;border-color:#d3dce2!important}.app-shell[data-theme=dark] .dashboard-section-link:hover .dashboard-section-icon,.app-shell[data-theme=dark] .mobile-menu-item:hover .mobile-menu-icon{color:#e5ebef!important;background:#10161b!important}.app-shell[data-theme=dark] .dashboard-section-link:hover .dashboard-section-copy small,.app-shell[data-theme=dark] .dashboard-section-link:hover .dashboard-section-arrow,.app-shell[data-theme=dark] .mobile-menu-item:hover .mobile-menu-arrow{color:#596772!important}.app-shell[data-theme=dark] .mobile-menu-drawer{background:#12191f!important}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.openings-page{padding-bottom:72px;position:relative}.openings-heading{align-items:flex-end}.openings-heading p{max-width:650px}.opening-catalog-count{flex:none;align-items:baseline;gap:7px;padding:0 2px 6px;display:flex}.opening-catalog-count strong{letter-spacing:-.05em;font-size:30px;font-weight:650;line-height:1}.opening-catalog-count span{color:var(--muted);font-size:10px}.eco-explainer{border-top:1px solid var(--border);border-bottom:1px solid var(--border);min-height:48px;color:var(--muted);align-items:center;gap:13px;margin-bottom:28px;padding:0 15px;font-size:10px;line-height:1.5;display:flex}.eco-explainer strong{color:var(--text);letter-spacing:.12em;flex:none;font:700 9px ui-monospace,SFMono-Regular,Menlo,monospace}.eco-explainer span{min-width:0}.catalog-search{max-width:820px;min-height:58px;box-shadow:none;background:var(--surface-solid);border-radius:14px;margin-bottom:20px}.catalog-search>span{font-size:19px}.catalog-search input{font-size:13px}.catalog-toolbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:18px;padding-bottom:18px;display:flex}.catalog-filters{flex-wrap:wrap;align-items:center;gap:3px;display:flex}.catalog-filters button{min-height:32px;color:var(--muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;padding:0 9px;font:500 10px/1 Inter,ui-sans-serif,system-ui,sans-serif;transition:background .18s,color .18s,border-color .18s}.catalog-filters button:hover{color:var(--text);background:var(--accent-soft)}.catalog-filters button.is-active{color:var(--text);background:var(--surface-solid);border-color:var(--border);box-shadow:0 4px 12px #1414120a}.catalog-filters button span{background:var(--surface-soft);min-width:18px;height:18px;color:var(--faint);border-radius:99px;place-items:center;margin-left:4px;padding:0 5px;font-size:8px;display:inline-grid}.catalog-selects{flex:none;align-items:center;gap:10px;display:flex}.catalog-selects label{align-items:center;gap:7px;display:flex}.catalog-selects label>span{color:var(--faint);letter-spacing:.12em;text-transform:uppercase;font-size:8px;font-weight:700}.catalog-selects select{border:1px solid var(--border);background:var(--surface-solid);min-width:82px;height:34px;color:var(--text);border-radius:8px;outline:none;padding:0 25px 0 9px;font:500 10px Inter,ui-sans-serif,system-ui,sans-serif}.catalog-selects select:focus{border-color:var(--border-strong)}.catalog-highlight{border-left:2px solid var(--accent-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--surface);justify-content:space-between;align-items:center;gap:18px;margin-top:22px;padding:17px 19px;display:flex}.catalog-highlight strong,.catalog-highlight small{display:block}.catalog-highlight strong{letter-spacing:-.02em;margin-top:4px;font-size:16px}.catalog-highlight small{color:var(--muted);margin-top:3px;font-size:9px}.catalog-section{margin-top:42px}.catalog-section-head{justify-content:space-between;align-items:center;gap:18px;margin-bottom:12px;display:flex}.catalog-section-head>div{align-items:baseline;gap:10px;display:flex}.catalog-section-index{color:var(--faint);letter-spacing:.08em;font:700 9px ui-monospace,SFMono-Regular,Menlo,monospace}.catalog-section-head h2{letter-spacing:-.03em;margin:0;font-size:19px;font-weight:650}.catalog-section-count{background:var(--surface-soft);min-width:22px;color:var(--faint);text-align:center;border-radius:99px;padding:3px 7px;font-size:8px}.catalog-more{padding:5px 0;font-size:10px}.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.catalog-opening-card{background:var(--surface-solid);border-radius:12px;min-height:0;transition:transform .22s cubic-bezier(.2,.7,.2,1),border-color .22s,box-shadow .22s}.catalog-opening-card:hover{border-color:var(--border-strong);transform:translateY(-2px);box-shadow:0 14px 30px #1919170e}.catalog-opening-card.is-adding{box-shadow:0 0 0 1px var(--border-strong),0 16px 34px #19191714;transform:translateY(-2px)}.catalog-opening-card .opening-card-main{color:inherit;text-decoration:none;display:block}.catalog-opening-card .opening-piece{background:var(--silver-soft);width:27px;height:27px;color:var(--text);border-radius:8px;font-size:15px}.catalog-opening-card .opening-view-count{color:var(--faint);font-size:8px}.opening-card-meta{color:var(--faint);letter-spacing:.12em;justify-content:space-between;gap:12px;margin-bottom:7px;font:700 7px/1 ui-monospace,SFMono-Regular,Menlo,monospace;display:flex}.opening-card-meta span:last-child{letter-spacing:.06em}.catalog-opening-card .opening-card-body h3{letter-spacing:-.025em;margin:0;font-size:16px;font-weight:650;line-height:1.18}.catalog-opening-card .opening-moves{color:var(--muted);margin-top:6px;font-size:9px;line-height:1.4}.catalog-opening-footer{border-top:1px solid var(--border);gap:8px;min-height:42px;padding:7px 10px 7px 11px}.catalog-favorite{width:28px;height:28px;color:var(--faint);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;flex:0 0 28px;place-items:center;padding:0;font-size:13px;line-height:1;transition:all .18s;display:grid;position:relative}.catalog-favorite:hover{color:var(--text);background:var(--surface-soft);border-color:var(--border)}.catalog-favorite.is-active{color:var(--text)}.catalog-favorite:after{content:attr(data-tooltip);opacity:0;pointer-events:none;white-space:nowrap;border:1px solid var(--border);background:var(--surface-solid);color:var(--text);letter-spacing:0;z-index:20;border-radius:7px;padding:5px 7px;font-size:9px;font-weight:500;transition:all .16s;position:absolute;bottom:calc(100% + 7px);left:50%;transform:translate(-50%)translateY(3px);box-shadow:0 8px 22px #0000001a}.catalog-favorite:hover:after{opacity:1;transform:translate(-50%)translateY(0)}.compact-add{border:1px solid var(--border);background:var(--surface);min-height:28px;color:var(--text);border-radius:8px;gap:6px;padding:0 9px;font-size:9px;transition:transform .18s,background .22s,color .22s,border-color .22s}.compact-add:hover:not(:disabled){border-color:var(--border-strong);background:var(--surface-soft);transform:translateY(-1px)}.compact-add-icon{place-items:center;width:15px;height:15px;font-size:11px;line-height:1;transition:transform .28s cubic-bezier(.2,.8,.2,1);display:grid}.compact-add.is-adding{background:var(--accent);color:var(--surface-solid);border-color:var(--accent)}.compact-add.is-adding .compact-add-icon{animation:.5s cubic-bezier(.2,.8,.2,1) add-check}.compact-add.is-added{background:var(--accent);color:var(--surface-solid);border-color:var(--accent)}@keyframes add-check{0%{opacity:.25;transform:scale(.55)rotate(-18deg)}55%{opacity:1;transform:scale(1.2)rotate(3deg)}to{opacity:1;transform:scale(1)rotate(0)}}.catalog-toast{z-index:60;border:1px solid var(--border);background:var(--surface-solid);min-width:235px;max-width:320px;color:var(--text);border-radius:12px;align-items:center;gap:10px;padding:11px 13px;animation:.28s cubic-bezier(.2,.8,.2,1) toast-in;display:flex;position:fixed;bottom:26px;right:26px;box-shadow:0 18px 45px #14141224}.catalog-toast-mark{background:var(--accent);width:25px;height:25px;color:var(--surface-solid);border-radius:8px;place-items:center;font-size:12px;font-weight:800;display:grid}.catalog-toast strong,.catalog-toast span{display:block}.catalog-toast strong{font-size:10px}.catalog-toast div span{color:var(--muted);margin-top:2px;font-size:9px}@keyframes toast-in{0%{opacity:0;transform:translateY(10px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.empty-inline{border:1px dashed var(--border-strong);color:var(--faint);text-align:center;border-radius:14px;margin-top:28px;padding:30px;font-size:11px}@media (width<=900px){.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-toolbar{flex-direction:column;align-items:flex-start}.catalog-selects{width:100%}}@media (width<=600px){.openings-heading{align-items:flex-start}.opening-catalog-count{display:none}.eco-explainer{align-items:flex-start;padding:12px 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