/* DSA RM uses WILSY's tokens; the original interaction engine is retained without its old global shell. */
.dsa-page{--text-primary:var(--ink);--text-secondary:var(--ink-soft);--text-muted:var(--muted);--color-purple:var(--focus);--color-blue:var(--focus);--color-green:var(--success)}
.dsa-page{padding-top:0;overflow-x:hidden}.dsa-page::before,.dsa-page::after{display:none}.dsa-page .dsa-shell{display:block;overflow:visible;position:relative;z-index:2;height:auto;flex:none}.dsa-page .premium-footer{height:auto;min-height:0;display:block;flex:none}
.dsa-shell{max-width:calc(var(--container) + 2 * var(--gutter));margin:auto;padding:0 var(--gutter)}
.dsa-intro{display:grid;grid-template-columns:1.7fr 1fr;align-items:center;gap:80px;padding:80px 0 56px}
.dsa-eyebrow{font:11px/1.6 var(--mono);letter-spacing:.08em;color:var(--muted);margin:0 0 16px;display:block}
.dsa-intro h1{font:600 clamp(36px,4.4vw,60px)/1.13 var(--font);letter-spacing:-.04em;color:var(--ink);margin:0 0 24px}.dsa-intro h1>span{color:var(--muted)}
.dsa-intro>div>p{font-size:16px;line-height:1.85;color:var(--muted);max-width:570px}
.dsa-intro-actions{display:flex;align-items:center;gap:24px;margin-top:32px;flex-wrap:wrap}.dsa-intro-actions a{display:inline-flex;align-items:center;gap:12px;min-height:48px;font-size:12px;font-weight:650}.dsa-primary{background:var(--blue);color:#fff;border-radius:12px;padding:12px 20px}
.dsa-intro-note{border:1px solid var(--line);border-radius:24px;background:linear-gradient(130deg,var(--surface),var(--surface-tint));padding:32px;box-shadow:var(--shadow-sm)}
.dsa-intro-note dl{margin:24px 0;display:grid;gap:20px}.dsa-intro-note dl>div{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:12px}.dsa-intro-note dt{font-size:13px;color:var(--muted)}.dsa-intro-note dd{font:600 32px var(--font);letter-spacing:-.03em;color:var(--ink);margin:0}.dsa-intro-note>p{font-size:12px;line-height:1.8;color:var(--muted)}
.dsa-start{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;border-block:1px solid var(--line);padding:32px 0;margin-bottom:64px}.dsa-start article{display:flex;gap:16px;align-items:flex-start}.dsa-start article>span{font:12px var(--mono);color:var(--focus);padding-top:4px}.dsa-start h2{font-size:14px;font-weight:650;margin:0 0 8px}.dsa-start p{font-size:12px;color:var(--muted)}
.dsa-workspace{border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:var(--shadow-sm);background:var(--surface);scroll-margin-top:104px}
.dsa-workspace-header{display:flex;align-items:center;gap:24px;padding:28px 32px 12px}.dsa-workspace-header .dsa-eyebrow{font-size:10px;margin-bottom:4px}.dsa-workspace-header h2{font-size:24px;letter-spacing:-.03em;font-weight:650}
.dsa-progress-summary{display:flex;align-items:center;gap:8px;margin-left:auto;font:11px var(--mono);color:var(--muted)}.dsa-progress-summary>span:first-child{color:var(--ink);font-weight:600}.dsa-progress-summary strong{color:var(--focus);border:1px solid var(--line);border-radius:6px;padding:4px 8px}
.dsa-storage-note{font-size:11px;color:var(--muted);padding:0 32px 24px;margin:0;min-height:40px}
.dsa-topic-nav{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:thin;border-top:1px solid var(--line);padding:16px 24px;background:var(--paper)}
.dsa-topic-nav>button{white-space:nowrap;min-height:40px;padding:8px 14px;border-radius:99px;border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);font:600 11px var(--font);text-transform:capitalize}
.dsa-topic-nav>button[aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.dsa-layout{display:grid;grid-template-columns:1.1fr 1fr;height:760px;border-top:1px solid var(--line)}
.dsa-view-switch{display:none}
.dsa-page .mindmap-container{position:relative;min-width:0;overflow:hidden;cursor:grab;user-select:none;background-color:var(--surface-subtle);background-image:radial-gradient(var(--line-strong) .65px,transparent .65px);background-size:20px 20px;border-right:1px solid var(--line);touch-action:none}
.dsa-page .canvas-controls{position:absolute;top:20px;left:20px;right:20px;display:flex;align-items:center;gap:4px;z-index:25;max-width:max-content;background:var(--surface);border:1px solid var(--line);padding:4px;border-radius:12px;box-shadow:var(--shadow-sm)}
.dsa-page .control-btn{font:600 10px var(--font);min-width:36px;min-height:40px;border-radius:8px;padding:8px;background:var(--surface);color:var(--ink)}.dsa-page .control-btn:hover{background:var(--surface-subtle)}
.dsa-page .mindmap-canvas{position:absolute;left:0;top:0;width:100%;height:100%;transform-origin:0 0;will-change:transform}.dsa-page .mindmap-canvas.smooth-pan{transition:transform .35s ease}
.dsa-page .mindmap-svg,.dsa-page .mindmap-tree-wrapper{position:absolute;top:0;left:0;width:10000px;height:10000px;overflow:visible}.dsa-page .mindmap-svg{pointer-events:none}
.dsa-page .connector-line{fill:none;stroke:var(--line-strong);stroke-width:1.8;opacity:.8}.dsa-page .connector-line.active{stroke:var(--focus);stroke-width:2.5}
.dsa-page .central-node{position:absolute;width:240px;min-height:56px;border-radius:12px;border:1px solid var(--line-strong);background:var(--ink);color:var(--paper);box-shadow:var(--shadow-md);font:650 16px var(--font);padding:12px 16px;cursor:pointer;z-index:2}.dsa-page .central-node span{display:block;font:10px/1.8 var(--mono);opacity:.7;margin-top:4px}
.dsa-page .tree-node{position:absolute;left:0;top:0;width:260px;min-height:42px;display:flex;align-items:center;gap:6px;justify-content:space-between;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);padding:4px 8px;transition:transform .4s ease,opacity .3s ease;box-shadow:var(--shadow-xs)}
.dsa-page .tree-node.level-0{border-left:4px solid var(--node-color);border-radius:12px}.dsa-page .tree-node.mastered{background:var(--surface-tint);border-color:var(--focus)}
.dsa-page .tree-node.active-path{border-color:var(--focus);box-shadow:var(--shadow-sm)}
.dsa-page .node-title-group{display:flex;align-items:center;gap:8px;flex:1;min-width:0;min-height:32px;white-space:nowrap;overflow:hidden;padding:4px 0;background:transparent;font:600 12px var(--font);color:var(--ink);text-align:left}.dsa-page .node-title-group>span:last-child{overflow:hidden;text-overflow:ellipsis}
.dsa-page .node-dot-indicator{width:6px;height:6px;background:var(--node-color);border-radius:50%;flex:none}.dsa-page .node-toggle-btn{display:grid;place-items:center;width:28px;height:28px;flex:none;border:1px solid var(--line);border-radius:7px;background:var(--surface-subtle);color:var(--ink)}.dsa-page .node-toggle-btn:not(.collapsed) svg{transform:rotate(90deg)}
.dsa-map-hint{position:absolute;bottom:16px;left:20px;font:10px var(--mono);color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:8px 12px;pointer-events:none}
.dsa-page .explorer-container{padding:28px;min-width:0;height:100%;overflow-y:auto;overscroll-behavior:contain;background:var(--surface)}
.dsa-page .explorer-header{display:flex;align-items:center;gap:24px;margin-bottom:24px}.dsa-page .progress-info{flex:1}.dsa-page .progress-info h3{font-size:13px;font-weight:650;margin:0 0 12px}.dsa-page .progress-info>p{font:10px/1.8 var(--mono);color:var(--muted);margin-top:8px}
.dsa-page .progress-bar-container{height:5px;background:var(--line);border-radius:99px;overflow:hidden}.dsa-page .progress-bar-fill{height:100%;background:var(--blue);width:0;transition:width .25s ease}
.dsa-page .circle-progress-container{position:relative;width:64px;height:64px;flex:none}.dsa-page .circle-svg{width:100%;height:100%;transform:rotate(-90deg);fill:none;stroke-width:4}.dsa-page .circle-bg{stroke:var(--line)}.dsa-page .circle-fill{stroke:var(--blue);stroke-dasharray:188.5;stroke-dashoffset:188.5;stroke-linecap:round}.dsa-page .circle-progress-container>span{position:absolute;inset:0;display:grid;place-items:center;font:11px var(--mono)}
.dsa-search{display:flex;align-items:center;gap:10px;padding:0 12px;background:var(--paper);border:1px solid var(--line-strong);border-radius:10px;margin-bottom:16px}.dsa-search>.icon{flex:none;color:var(--muted)}.dsa-search input{width:100%;min-width:0;height:48px;border:0;background:transparent;color:var(--ink);font:14px var(--font)}.dsa-search:focus-within{outline:2px solid var(--focus);outline-offset:2px}.dsa-search input:focus{outline:0}
.dsa-page .filter-row{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}.dsa-page .difficulty-filters{display:flex;gap:6px;flex-wrap:wrap}.dsa-page .filter-btn{border:1px solid var(--line);border-radius:8px;padding:7px 10px;min-height:36px;font:11px var(--font);color:var(--ink-soft);background:var(--surface)}.dsa-page .filter-btn.active{color:var(--focus);background:var(--blue-soft);border-color:var(--focus)}
.dsa-page .category-indicator{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.dsa-page .category-indicator h3{font-size:14px;margin:0}.dsa-page #selectedCategoryCount{background:var(--surface-subtle)!important;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:2px 8px;font:11px/1.8 var(--mono)}
.dsa-page .patterns-list{display:flex;flex-direction:column;gap:12px}.dsa-page .pattern-card{display:flex;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;cursor:pointer}.dsa-page .pattern-card:focus-within,.dsa-page .pattern-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-xs)}
.dsa-page .mastery-checkbox-wrapper{display:flex;align-items:flex-start;position:relative;flex:none;width:24px;padding-top:3px}.dsa-page .mastery-checkbox{appearance:auto;width:18px;height:18px;margin:0;cursor:pointer;accent-color:var(--blue)}.dsa-page .checkmark{display:none}.dsa-page .pattern-content{min-width:0;flex:1}.dsa-page .pattern-card-title{display:block;font:650 14px/1.6 var(--font);color:var(--ink);background:transparent;text-align:left;padding:0;border:0}
.dsa-page .badge-row{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}.dsa-page .diff-badge{font:9px/1.8 var(--mono);border:1px solid var(--line)!important;border-radius:5px;padding:1px 6px;background:var(--surface-subtle)!important;color:var(--ink-soft)!important}
.dsa-page .pattern-desc{font-size:12px;line-height:1.8;color:var(--muted)}.dsa-page .pattern-problems-count{display:flex;gap:6px;align-items:center;font:10px var(--mono);margin-top:12px;color:var(--muted)}.dsa-page .empty-state{text-align:center;padding:40px 20px;color:var(--muted);font-size:14px}
.dsa-page .drawer-overlay{display:none;position:fixed;inset:0;z-index:70;background:#0b122080;backdrop-filter:blur(4px)}.dsa-page .drawer-overlay.active{display:block}
.dsa-page .drawer-content{display:none;position:fixed;top:0;bottom:0;right:0;width:min(620px,100%);z-index:71;background:var(--surface);color:var(--ink);box-shadow:var(--shadow-lg);border-left:1px solid var(--line)}.dsa-page .drawer-content.active{display:flex;flex-direction:column}
.dsa-page .drawer-header{display:flex;align-items:flex-start;gap:24px;justify-content:space-between;padding:32px;border-bottom:1px solid var(--line)}.dsa-page .drawer-header h2{font:600 26px/1.3 var(--font);letter-spacing:-.03em;margin-top:8px}.dsa-page .drawer-category-label{color:var(--muted)!important;font:11px var(--mono)}
.dsa-page :is(#closeDrawerBtn,#closeAuthBtn,#copyCodeBtn,#btnShowAuth,#btnLogout){background:var(--surface-subtle);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:8px 12px;min-height:44px;font:12px var(--font);flex:none}
.dsa-page .drawer-scroll-area{padding:32px;overflow:auto;overscroll-behavior:contain;flex:1}.dsa-page .drawer-scroll-area section+section{margin-top:32px}.dsa-page .drawer-scroll-area h3{font-size:14px;margin-bottom:16px}.dsa-page #drawerDescription{font-size:15px;color:var(--ink-soft);line-height:1.8}.dsa-external-note{font-size:11px;color:var(--muted);line-height:1.7;margin:12px 0}
.dsa-page .problem-link-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px;border:1px solid var(--line);border-radius:10px;color:var(--ink-soft);font-size:13px;margin-top:8px}.dsa-page .problem-name{display:flex;align-items:center;gap:8px}.dsa-page .problem-name svg{flex:none;color:var(--muted)!important}.dsa-page .problem-link-item:hover{background:var(--paper)}
.dsa-page .code-header{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:12px}.dsa-page .code-header h3{margin:0}
.dsa-page pre{overflow:auto;tab-size:4;padding:20px;border:1px solid var(--line);border-radius:12px;background:var(--surface-subtle);color:var(--ink);line-height:1.8;font:12px/1.8 var(--mono);max-width:100%}.dsa-page code{font:inherit}
body.dsa-modal-open{overflow:hidden}
.dsa-page .auth-modal-overlay{display:none;position:fixed;inset:0;z-index:80;background:#0b122080;padding:24px;overflow:auto;align-items:center;justify-content:center}.dsa-page .auth-modal-overlay.active{display:flex}.dsa-page .auth-modal-content{width:min(440px,100%);border:1px solid var(--line);border-radius:20px;background:var(--surface);color:var(--ink);padding:28px;box-shadow:var(--shadow-lg)}
.dsa-page .auth-modal-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.dsa-page .auth-modal-header h2{font-size:24px}.dsa-page .auth-modal-content>p{font-size:13px;color:var(--muted);margin-bottom:24px}.dsa-page .auth-input-group{display:flex;flex-direction:column;gap:8px;font-size:13px;margin:16px 0}.dsa-page .auth-input-group input{font:16px var(--font);color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:8px;padding:12px;min-height:44px}
.dsa-page #btnSubmitAuth{width:100%;background:var(--blue);color:#fff;border-radius:8px;min-height:48px;font-size:14px;margin-top:12px}.dsa-page .auth-toggle-prompt{font-size:12px;margin:20px 0}.dsa-page #authToggleLink{background:none;color:var(--focus);min-height:44px}.dsa-page .auth-modal-content>a{font-size:11px;text-decoration:underline}.dsa-page #authErrorMessage,.dsa-page #authWarningMessage{font-size:13px;color:var(--ink-soft);background:var(--surface-tint);padding:12px;border:1px solid var(--line);border-radius:8px}
.dsa-page #userProfileMenu{align-items:center;gap:8px;font-size:11px;max-width:280px}.dsa-page #userEmailDisplay{overflow:hidden;text-overflow:ellipsis}
.dsa-library{margin:40px 0 80px}.dsa-library>details{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px}.dsa-library summary{font-size:14px;font-weight:600;cursor:pointer;min-height:32px}.dsa-library-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:24px}.dsa-library-grid details{padding:16px;border:1px solid var(--line);border-radius:10px;min-width:0}.dsa-library-grid summary>span{display:block;font:10px/1.8 var(--mono);color:var(--muted);margin-top:4px}.dsa-library-grid p,.dsa-library-grid li{font-size:13px;color:var(--ink-soft);line-height:1.8}.dsa-library-grid p{margin-top:12px}.dsa-library>p{font-size:11px;line-height:1.8;color:var(--muted);margin-top:24px;max-width:900px}.dsa-library>p>a{text-decoration:underline}
@media(max-width:1024px){
 .dsa-intro{gap:40px;grid-template-columns:1.4fr 1fr;padding-top:56px}.dsa-intro h1{font-size:42px}.dsa-intro-note{padding:24px}.dsa-start{gap:20px}.dsa-workspace-header{flex-wrap:wrap;padding:24px 24px 12px}.dsa-storage-note{padding:0 24px 20px}.dsa-view-switch{display:flex;gap:8px;padding:12px 20px;border-top:1px solid var(--line)}.dsa-view-switch button{flex:1;min-height:44px;background:var(--paper);color:var(--ink-soft);border:1px solid var(--line);border-radius:10px;font-size:12px;font-weight:650}.dsa-view-switch button.active{background:var(--ink);color:var(--paper)}
 .dsa-layout{display:block;height:720px;height:min(80dvh,800px)}.dsa-page .mindmap-container{width:100%;height:100%;border:0}.dsa-page .explorer-container{display:none;padding:24px}.dsa-page .view-explorer .mindmap-container{display:none}.dsa-page .view-explorer .explorer-container{display:block}.dsa-page .pattern-card{padding:20px}.dsa-page .mastery-checkbox-wrapper{width:28px}
}
@media(max-width:600px){
 .dsa-intro{grid-template-columns:1fr;gap:32px;padding:40px 0}.dsa-intro h1{font-size:38px}.dsa-intro>div>p{font-size:15px}.dsa-intro-actions{gap:12px;margin-top:24px}.dsa-intro-note dl{grid-template-columns:repeat(3,1fr);gap:12px}.dsa-intro-note dl>div{flex-direction:column-reverse;gap:8px;align-items:flex-start}.dsa-intro-note dt{font-size:10px}.dsa-intro-note dd{font-size:28px}.dsa-start{grid-template-columns:1fr;gap:24px;margin-bottom:40px}.dsa-workspace{border-radius:16px}.dsa-workspace-header{padding:20px 20px 12px;gap:16px}.dsa-workspace-header h2{font-size:20px}.dsa-progress-summary{margin-left:0;width:100%;font-size:10px}.dsa-storage-note{padding-inline:20px}.dsa-topic-nav{padding:12px 16px}.dsa-topic-nav>button{min-height:44px}.dsa-page .explorer-container{padding:20px 16px}.dsa-page .canvas-controls{left:10px;right:10px;top:12px;gap:2px;padding:3px}.dsa-page .control-btn{padding:6px;font-size:9px;min-height:44px;min-width:32px}.dsa-page .pattern-card{padding:16px;gap:8px}.dsa-page .pattern-card-title{font-size:14px;min-height:36px}.dsa-page .filter-btn{min-height:44px}.dsa-search input{font-size:16px}.dsa-page .drawer-content{top:5dvh;border-top:1px solid var(--line);border-radius:20px 20px 0 0}.dsa-page .drawer-header{padding:24px}.dsa-page .drawer-header h2{font-size:22px}.dsa-page .drawer-scroll-area{padding:24px}.dsa-page .auth-modal-overlay{padding:16px}.dsa-page .auth-modal-content{padding:24px}.dsa-library-grid{grid-template-columns:1fr}.dsa-library>details{padding:20px}.dsa-library{margin-bottom:56px}
}