@layer reset,tokens,base,vendor,components,patterns,pages;@layer pages{.account-entry{min-height:100dvh;display:grid;place-items:center;padding:24px}.account-card{width:min(100%,420px);padding:32px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel)}.account-card h1{font-size:var(--text-h1);margin:16px 0 8px}.account-card label,.account-settings label{display:grid;gap:7px;margin:18px 0}.account-card input,.account-settings input{width:100%;min-height:42px}.account-card>.button.primary{width:100%;justify-content:center;margin-top:6px}.account-menu{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.account-menu>[role=alert]{font-size:12px;max-width:220px}.account-settings{display:grid;gap:24px}.account-settings form+form,.account-settings section{border-top:1px solid var(--line);padding-top:16px}.account-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.account-row form{flex-basis:100%}.account-settings details{padding:8px 0}.account-row small{display:block;margin-top:4px}@media(max-width:480px){.account-card{padding:24px}.account-menu>.button{padding-inline:8px}}.account-card>.button.primary+p{margin-top:18px}.account-card input:focus{box-shadow:none;outline:2px solid var(--focus-ring);outline-offset:2px}.account-trigger{gap:8px}.account-avatar{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--state-selected);color:var(--accent);font-weight:600}@media(max-width:767px){.account-name{display:none}.account-trigger{padding:4px;min-width:36px;border:0;background:none}}}@layer pages{.syntax-code .hljs-keyword,.syntax-code .hljs-selector-tag{color:var(--violet)}.syntax-code .hljs-type,.syntax-code .hljs-built_in,.syntax-code .hljs-title{color:var(--info)}.syntax-code .hljs-string,.syntax-code .hljs-regexp{color:var(--code-string)}.syntax-code .hljs-number,.syntax-code .hljs-literal,.syntax-code .hljs-symbol{color:var(--warning)}.syntax-code .hljs-meta{color:var(--info)}.syntax-code .hljs-comment,.syntax-code .hljs-doctag{color:var(--muted)}.syntax-code .hljs-subst{color:var(--ink)}}@layer pages{.copy-code-icon,.copy-code-label{display:inline-grid;flex:none;align-items:center}.copy-code-icon>*,.copy-code-label>*{grid-area:1 / 1;transition:opacity var(--motion-fast) var(--ease-out)}.copy-code-label{white-space:nowrap;text-align:start}.copy-code-success{opacity:0}.copy-code-button[data-copied=true] .copy-code-success{opacity:1}.copy-code-button[data-copied=true] .copy-code-idle{opacity:0}.copy-code-button[data-motion=instant] :is(.copy-code-icon,.copy-code-label)>*,:root[data-motion-input=keyboard] .copy-code-button :is(.copy-code-icon,.copy-code-label)>*{transition:none}}@layer pages{.solved-mark{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:18px;height:18px;border:1px solid var(--success);border-radius:50%;background:var(--success-soft);color:var(--success);line-height:1}.problem-open.is-solved{position:relative;padding-right:24px}.problem-open>.solved-mark{position:absolute;right:0;top:50%;transform:translateY(-50%)}.button.checkin-primary{background:var(--success);border-color:var(--success);color:var(--on-accent)}.button.checkin-primary:hover:not(:disabled){background:var(--success);border-color:var(--success)}.checkins-section .section-header{flex-wrap:wrap;gap:10px}.checkins-section .section-header h3{display:flex;align-items:center;gap:7px}.checkins-section .hint{font-size:13px;color:var(--muted)}.checkin-record{border:1px solid var(--line);border-radius:var(--radius-control);margin-top:10px;overflow:hidden}.checkin-record summary{padding:11px 12px;cursor:pointer;color:var(--success);font-size:13px;font-weight:600;background:var(--success-soft)}.checkin-record summary time{display:block;margin-top:3px;color:var(--muted);font-size:12px;font-weight:400}.checkin-record.withdrawn summary{background:var(--canvas);color:var(--muted)}.checkin-tools{display:flex;align-items:center;flex-wrap:wrap;gap:14px;padding:10px 12px}.checkin-code{margin:0;padding:14px;max-height:280px;overflow:auto;background:var(--canvas);color:var(--ink);border-top:1px solid var(--line);font:var(--text-code) / 1.7 var(--font-code);white-space:pre;-moz-tab-size:4;tab-size:4}.checkin-code code{font:inherit}.checkin-form{display:flex;flex-direction:column;gap:15px}.checkin-form .checkin-problem-name{margin:0;font-weight:600;overflow-wrap:anywhere}.checkin-input-row{display:grid;grid-template-columns:minmax(120px,1fr) minmax(0,2fr);gap:16px}.checkin-input-row label,.checkin-form>label:not(.checkin-confirm){display:flex;flex-direction:column;gap:7px;min-width:0}.checkin-input-row input{font-size:12px;max-width:100%}.checkin-editor{font:var(--text-code) / 1.7 var(--font-code);-moz-tab-size:4;tab-size:4;min-height:230px;white-space:pre;overflow-wrap:normal;resize:vertical}.checkin-confirm{display:flex;align-items:center;gap:9px}.checkin-confirm input{width:16px;height:16px;accent-color:var(--success);flex-shrink:0}.checkin-viewer .checkin-code{border:1px solid var(--line);border-radius:var(--radius-control);max-height:60vh}@media(max-width:600px){.checkin-input-row{grid-template-columns:1fr}.checkin-editor{min-height:190px}}}@layer pages{.markdown-body{font-size:16px;line-height:1.85;overflow-wrap:anywhere;min-width:0}.detail-page .problem-statement{padding-top:18px}.statement-navigation{display:flex;flex-wrap:wrap;gap:4px 8px;margin:0 0 14px}.markdown-body .statement-navigation a{display:inline-flex;align-items:center;min-height:36px;padding:4px 10px;border:1px solid var(--line);border-radius:var(--radius-control);font-size:13px;line-height:1.5;color:var(--muted);text-decoration:none}.markdown-body .statement-navigation a:hover{color:var(--accent);background:var(--surface-hover)}.markdown-body .statement-source{background:transparent;margin:0 0 16px;padding:0;border:0;font-size:13px;line-height:1.65}.detail-page .statement-source p{margin:0}.problem-statement .markdown-body>:is(h2,h3):first-child,.problem-statement .statement-source+:is(h2,h3),.problem-statement .statement-navigation+:is(h2,h3){margin-top:0}.markdown-body :is(h2,h3,h4,h5,h6)[id]{scroll-margin-top:18px}@media(max-width:600px){.markdown-body .statement-navigation a{min-height:44px}}.markdown-body p{margin:0 0 18px}.markdown-body>:last-child{margin-bottom:0}.markdown-body ul,.markdown-body ol{margin:8px 0 14px;padding-left:1.65em}.markdown-body li{margin:5px 0}.markdown-body li>p{margin-bottom:5px}.markdown-body strong{font-weight:600}.markdown-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}.markdown-body code{font-family:var(--font-code);font-size:.9em;background:var(--surface-subtle);border-radius:var(--radius-control);padding:2px 4px}.markdown-body pre{padding:18px 20px;border-radius:var(--radius-panel);overflow-x:auto;background:var(--surface-subtle);line-height:1.75;border:1px solid var(--line);font-size:var(--text-code)}.markdown-body pre code{font:inherit;font-family:var(--font-code);background:none;padding:0;white-space:pre;-moz-tab-size:4;tab-size:4;overflow-wrap:normal}.markdown-body blockquote{margin:12px 0;border-left:3px solid var(--line);padding-left:12px;color:var(--muted)}.markdown-body .katex{font-size:1.06em}.markdown-body .katex-display{overflow-x:auto;overflow-y:hidden;padding:4px 0;margin:12px 0}.markdown-body img{max-width:100%;height:auto}.markdown-table-scroll{overflow-x:auto;margin:12px 0}.markdown-body table{border-collapse:collapse;font-size:15px;width:auto;min-width:100%}.markdown-body th,.markdown-body td{border:1px solid var(--line);padding:10px 12px}.markdown-body th{background:var(--canvas)}.markdown-preview{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;color:var(--muted);font-size:12px;line-height:1.6;margin-top:5px}.markdown-preview p{display:inline;margin:0}.markdown-loading{min-block-size:6em;padding-block:.45em}.markdown-loading-lines{display:grid;gap:.85em}.markdown-loading-lines>span{display:block;block-size:.85em;border-radius:var(--radius-control);background:var(--surface-hover)}.markdown-loading-lines>span:nth-child(2){width:92%}.markdown-loading-lines>span:last-child{width:68%}.markdown-load-error{padding:12px 14px;margin-bottom:16px;border:1px solid var(--line);border-radius:var(--radius-control);background:var(--surface-subtle);color:var(--muted);font-size:var(--text-sm)}.markdown-load-error p{margin:0 0 10px}.detail-page .markdown-body{font-size:var(--text-reading);line-height:1.85}.markdown-body h1{font-size:1.6em;line-height:1.4;margin:32px 0 18px}.markdown-body h2{font-size:1.3em;line-height:1.5;margin:30px 0 16px}.markdown-body h3{font-size:1.12em;line-height:1.6;margin:26px 0 12px}.markdown-body h4{font-size:1em;line-height:1.6;margin:22px 0 10px}.markdown-body :is(h1,h2,h3,h4):first-child{margin-top:0}.markdown-body img{display:block;margin:24px auto;border-radius:var(--radius-control)}.markdown-body blockquote{color:var(--ink);padding:12px 18px;border-color:var(--accent-border);background:var(--surface-subtle)}@media(max-width:767px){.markdown-body pre{padding:14px}.markdown-body table{font-size:14px}}}@layer pages{.filter-topic-picker{min-width:0}.filter-topic-search{display:flex;align-items:center;gap:8px;margin-top:8px;border:1px solid var(--line);border-radius:var(--radius-control);padding:0 12px;background:var(--surface);color:var(--muted)}.filter-topic-search:focus-within{outline:2px solid var(--accent);outline-offset:2px}.filter-topic-search input:not([type=checkbox]):not([type=radio]):not([type=file]){width:100%;min-width:0;min-height:44px;padding:8px 0;border:0;background:transparent;font-size:16px}.filter-topic-search input[type=search]:focus{outline:none;box-shadow:none}.filter-topic-picker .selected-tags{margin-top:10px}.filter-topic-picker .selected-tags button{min-height:32px}.filter-topic-picker-caption{display:flex;flex-wrap:wrap;gap:4px 12px;justify-content:space-between;font-size:12px;color:var(--muted);margin:10px 0 6px}.filter-topic-options{max-height:232px;overflow-y:auto;overscroll-behavior:contain;border:1px solid var(--line);border-radius:var(--radius-control);padding:6px;scrollbar-gutter:stable}.filter-topic-options fieldset{border:0;min-width:0;padding:0;margin:0 0 8px}.filter-topic-options fieldset:last-child{margin-bottom:0}.filter-topic-options legend{padding:6px 8px;font-size:12px;font-weight:600;color:var(--muted)}.filter-topic-option{display:flex;flex-direction:row;align-items:center;gap:10px;min-height:44px;padding:7px 8px;border-radius:var(--radius-control);cursor:pointer}.filter-topic-option:hover,.filter-topic-option:focus-within{background:var(--surface-hover)}.filter-topic-option input{width:16px;height:16px;flex-shrink:0;margin:0;accent-color:var(--accent)}.filter-topic-option-name{font-size:14px}.filter-topic-option small{display:block;margin-top:2px;color:var(--muted);font-size:12px}.filter-topic-option:has(input:checked){background:var(--accent-soft)}.filter-topic-empty{margin:0;padding:20px 12px;color:var(--muted);font-size:14px}.filter-topic-advanced{margin:16px 0 22px;border-bottom:1px solid var(--line);padding-bottom:16px}.filter-topic-advanced>summary{cursor:pointer;color:var(--muted);font-size:13px;padding:8px 0}.filter-topic-advanced[open]>summary{margin-bottom:14px}.filter-topic-advanced .filter-section{margin-bottom:18px}}@layer pages{.dialog-content.advanced-filters-overlay{--advanced-filters-offset: -4px;position:fixed;top:var(--advanced-filters-top, 152px);right:var(--advanced-filters-right, 24px);bottom:auto;left:auto;width:min(620px,calc(100vw - 32px));max-height:min(640px,calc(var(--advanced-filters-viewport-bottom, 100dvh) - var(--advanced-filters-top, 152px) - 16px));display:flex;flex-direction:column;overflow:hidden;opacity:1;transform:translateY(0);background:var(--surface-float);border:1px solid var(--line);border-radius:var(--radius-float);box-shadow:var(--shadow-float);color:var(--ink);animation:none;transition:opacity var(--motion-fast) var(--ease-out),transform var(--motion-fast) var(--ease-out)}.dialog-overlay.advanced-filters-backdrop{opacity:1;animation:none;transition:opacity var(--motion-fast) var(--ease-out)}.advanced-filters-backdrop[data-state=closed],.advanced-filters-overlay[data-state=closed]{opacity:0;pointer-events:none;animation:surface-exit var(--motion-fast) linear}.advanced-filters-overlay[data-state=closed]{transform:translateY(var(--advanced-filters-offset))}@starting-style{.advanced-filters-backdrop[data-state=open],.advanced-filters-overlay[data-state=open]{opacity:0}.advanced-filters-overlay[data-state=open]{transform:translateY(var(--advanced-filters-offset))}}.advanced-filters-heading{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);flex:0 0 auto;padding:var(--space-4) var(--space-6);border-bottom:1px solid var(--line)}.advanced-filters-heading h2{margin:0;font-size:18px;font-weight:600;line-height:1.5;outline:none}.advanced-filters-heading .advanced-filters-close{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;flex:0 0 36px;padding:0;border-radius:var(--radius-control)}.advanced-filters-body{min-height:0;overflow:auto;overscroll-behavior:contain;padding:var(--space-6);scrollbar-gutter:stable}.advanced-filters-overlay .filter-panel{max-height:none;overflow:visible;padding:0;border:0;background:transparent}.advanced-filters-overlay .filter-section{flex-wrap:wrap;margin-bottom:var(--space-4)}.advanced-filters-overlay .filter-section>.hint{flex-basis:100%;margin-top:2px;color:var(--muted);line-height:1.6}.advanced-filters-overlay .selected-tags{flex-basis:100%}.advanced-filters-overlay .selected-tags .tag{max-width:100%;white-space:normal;overflow-wrap:anywhere;text-align:left}.advanced-filters-overlay .rating-heading{align-items:flex-start;padding-top:var(--space-4)}.advanced-filters-overlay .rating-heading>div{min-width:0}.advanced-filters-overlay .rating-heading .hint{line-height:1.65}.advanced-filters-overlay .rating-heading>button{flex-shrink:0}.advanced-filters-overlay .rating-clause{gap:var(--space-2);padding:var(--space-3) 0}.advanced-filters-overlay .rating-clause+.rating-clause{border-top:1px solid var(--line)}.advanced-filters-overlay .checkbox-line{margin-top:var(--space-3)}.advanced-filters-footer{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);flex:0 0 auto;padding:var(--space-4) var(--space-6);border-top:1px solid var(--line);background:var(--surface)}.advanced-filters-footer p{margin:0;color:var(--muted);font-size:var(--text-sm);line-height:1.6}.advanced-filters-footer>button{min-width:80px;flex-shrink:0}@media(max-width:767px){.dialog-content.advanced-filters-overlay{--advanced-filters-offset: 12px;top:auto;right:0;bottom:max(0px,calc(100dvh - var(--advanced-filters-viewport-bottom, 100dvh)));left:0;width:100%;max-height:min(88dvh,calc(var(--advanced-filters-viewport-height, 100dvh) - 12px));border-radius:var(--radius-float) var(--radius-float) 0 0}.advanced-filters-heading,.advanced-filters-body,.advanced-filters-footer{padding-left:var(--space-4);padding-right:var(--space-4)}.advanced-filters-heading .advanced-filters-close{width:44px;height:44px;flex-basis:44px}.advanced-filters-overlay .topic-filter select{flex:1;min-width:0;max-width:100%}.advanced-filters-overlay .rating-heading{flex-wrap:wrap}.advanced-filters-footer{padding-bottom:max(var(--space-4),env(safe-area-inset-bottom))}.advanced-filters-footer>button{min-height:44px}}:is(.advanced-filters-backdrop,.advanced-filters-overlay)[data-motion=instant]{transition:none;animation:none}:is(.advanced-filters-backdrop,.advanced-filters-overlay)[data-motion=instant][data-state=closed]{animation:surface-exit 1ms linear!important}@media(prefers-reduced-motion:reduce){:is(.advanced-filters-backdrop,.advanced-filters-overlay)[data-state=closed]{animation:surface-exit 1ms linear!important}}:root[data-motion=reduce] :is(.advanced-filters-backdrop,.advanced-filters-overlay)[data-state=closed]{animation:surface-exit 1ms linear!important}}@layer pages{.difficulty-red{--rating-color: var(--lv-red);--rating-ink: var(--lv-red-ink)}.difficulty-orange{--rating-color: var(--lv-orange);--rating-ink: var(--lv-orange-ink)}.difficulty-yellow{--rating-color: var(--lv-yellow);--rating-ink: var(--lv-yellow-ink)}.difficulty-green{--rating-color: var(--lv-green);--rating-ink: var(--lv-green-ink)}.difficulty-cyan{--rating-color: var(--lv-cyan);--rating-ink: var(--lv-cyan-ink)}.difficulty-blue{--rating-color: var(--lv-blue);--rating-ink: var(--lv-blue-ink)}.difficulty-purple{--rating-color: var(--lv-purple);--rating-ink: var(--lv-purple-ink)}.difficulty-black{--rating-color: var(--lv-black);--rating-ink: var(--lv-black-ink)}.difficulty-unrated{--rating-color: var(--level-unrated);--rating-ink: var(--level-unrated-ink)}.difficulty-badge.difficulty-badge{display:inline-flex;align-items:center;align-self:flex-start;gap:6px;border:0;border-radius:var(--radius-tag);padding:2px 0;color:var(--rating-ink);background:none;font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.4;max-width:100%;overflow-wrap:anywhere}.difficulty-badge:before{content:"";width:7px;height:7px;flex:0 0 7px;border-radius:50%;background:var(--rating-color);box-shadow:0 0 0 1px color-mix(in srgb,var(--rating-ink) 35%,transparent)}.difficulty-part{white-space:nowrap}.difficulty-legend-trigger.difficulty-legend-trigger{gap:5px;margin-right:12px;font-size:12px}.difficulty-legend-body{display:flex;flex-direction:column;gap:16px}.difficulty-scale-scroll{overflow-x:auto;flex-shrink:0}.difficulty-scale-table{border-collapse:collapse;width:100%;font-size:12px;white-space:nowrap}.difficulty-scale-table th,.difficulty-scale-table td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line)}.difficulty-scale-table th{color:var(--muted);font-weight:500}.preview-rating-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}.preview-rating-badges>span{display:inline-flex;align-items:center;flex-wrap:wrap;gap:7px}@media(max-width:640px){.difficulty-legend-trigger.difficulty-legend-trigger{margin-right:0}.sort-control{flex-wrap:wrap;justify-content:flex-end}}}@layer pages{.related-training-dialog.dialog-content{width:min(660px,calc(100vw - 32px))}.related-count{margin-left:6px;font-size:11px;color:var(--accent);font-variant-numeric:tabular-nums}.related-training-context{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 24px}.related-training-context>div{flex:1;min-width:0}.related-training-context strong{display:block;font-size:16px;margin-top:5px;overflow-wrap:anywhere}.related-training-context span{color:var(--muted);font-size:12px}.related-training-context>button{white-space:nowrap;flex-shrink:0}.related-training-context>button.active{color:var(--accent)}.related-tabs{display:flex;padding:0 24px;gap:26px;border-bottom:1px solid var(--line)}.related-tabs>button{border:0;border-bottom:2px solid transparent;background:none;padding:12px 0;display:flex;gap:9px;align-items:center;color:var(--muted);font-weight:600}.related-tabs>button[aria-selected=true]{border-bottom-color:var(--accent);color:var(--accent);font-weight:600}.related-tabs>button>span{font-size:12px;font-variant-numeric:tabular-nums}.related-panel{overflow-y:auto;min-height:260px;padding:18px 24px 10px}.related-panel:focus-visible{outline-offset:-3px}.related-guidance{font-size:13px;line-height:1.7;color:var(--muted);margin:0 0 16px}.related-management{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.related-management>span{font-size:12px;color:var(--muted)}.related-management>button{white-space:nowrap}.related-training-list{margin:0;padding:0;list-style:none}.related-training-list>li{border-top:1px solid var(--line);padding:16px 0}.related-row-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.related-problem-open{border:0;padding:0;display:flex;align-items:baseline;gap:8px;min-width:0;background:none;text-align:left;color:var(--ink)}.related-problem-open strong{font-weight:600;font-size:15px;overflow-wrap:anywhere}.related-problem-open svg{color:var(--muted)}.related-problem-open:hover,.related-problem-open:hover svg{color:var(--accent)}.related-completion{display:inline-flex;align-items:center;gap:4px;white-space:nowrap;font-size:12px;color:var(--muted);padding-top:2px}.related-completion.done{color:var(--success)}.related-identity{color:var(--muted);font-size:12px;margin:6px 0 8px}.related-reason{margin:0;font-size:14px;line-height:1.75;white-space:pre-wrap;overflow-wrap:anywhere}.related-row-actions{display:flex;gap:20px;margin-top:12px}.related-row-actions>button{font-size:12px}.related-empty{text-align:center;padding:38px 10px}.related-empty strong{font-size:15px;font-weight:600}.related-empty p{font-size:13px;line-height:1.7;color:var(--muted);margin:10px 0 0}.related-footer{padding:15px 24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px}.related-entry{margin:24px 0;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}.related-entry strong{font-size:14px;font-weight:600}.related-entry p{font-size:12px;color:var(--muted);margin:7px 0 0}.relation-direction{padding:12px 14px;border-left:2px solid var(--accent);background:var(--surface-subtle);line-height:1.7;font-size:13px}@media(max-width:600px){.related-training-dialog.dialog-content{width:calc(100vw - 20px);max-height:calc(100dvh - 24px)}.related-training-context,.related-footer{padding:16px}.related-tabs{padding:0 16px;gap:24px}.related-panel{padding:16px;min-height:230px}.related-training-context strong{font-size:15px}.related-management{align-items:flex-start}}}@layer pages{.handout-dialog{max-width:520px}.handout-description{padding:20px 24px 8px}.handout-description strong{font-size:16px;line-height:1.5}.handout-description p{line-height:1.7;margin:10px 0}.handout-secondary{color:var(--muted);font-size:13px;line-height:1.6}.handout-dialog>.handout-secondary{margin:0 24px 16px}.handout-progress{display:flex;gap:10px;align-items:center;padding:14px 24px}.handout-dialog>.error-box{margin:0 24px 16px}.handout-footer{display:flex;gap:10px;justify-content:flex-end;padding:16px 24px;border-top:1px solid var(--line)}.handout-spinner{animation:handout-spin 1s linear infinite}@keyframes handout-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.handout-spinner{animation:none}}}@layer pages{.learning-mode{display:flex;align-items:center;flex-wrap:wrap;gap:8px 16px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}.learning-mode-buttons{display:inline-grid;grid-template-columns:repeat(2,minmax(84px,1fr));gap:3px;padding:4px;border:1px solid var(--line);border-radius:var(--radius-panel);background:var(--surface)}.learning-mode-buttons>.button{min-height:34px;padding:6px 14px;border:1px solid transparent;border-radius:var(--radius-control);background:transparent;color:var(--muted);font-size:var(--text-sm);font-weight:600;white-space:nowrap;transition:color var(--motion-hover) var(--ease-out),background-color var(--motion-hover) var(--ease-out),border-color var(--motion-hover) var(--ease-out)}@media(hover:hover){.learning-mode-buttons>.button:hover:not(:disabled){background:var(--surface-hover);border-color:transparent;color:var(--ink)}}@media(hover:hover){.learning-mode-buttons>.button[aria-pressed=true]:hover{color:var(--accent-strong);border-color:var(--line);background:var(--surface-float)}}.learning-mode-buttons>.button[aria-pressed=true]{color:var(--accent-strong);border-color:var(--line);background:var(--surface-float)}.learning-mode-buttons>.button:focus-visible{outline:2px solid var(--focus-ring, var(--accent));outline-offset:2px}.learning-mode p{flex:1 1 220px;margin:0;color:var(--muted);font-size:var(--text-sm);line-height:1.6}.learning-disclosure-gate{margin:12px 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12px;margin-block:8px;font-size:var(--text-sm);line-height:1.6;color:var(--muted)}.reading-range-controls{padding-block:6px}.reading-range-controls>span:first-child{flex:1 1 240px;font-weight:600;color:var(--ink)}.reading-range-controls>span{overflow-wrap:anywhere}.reading-position-notice{padding:9px 12px;border:1px solid var(--line);border-radius:var(--radius-panel);background:var(--surface);color:var(--ink)}.reading-position-notice>span{flex:1 1 220px;min-width:0;overflow-wrap:anywhere}.reading-range-controls>.button,.reading-position-notice>.button{min-height:32px;padding:5px 10px;font-size:var(--text-sm);flex-shrink:0}.reading-range-end{margin-block:8px;font-size:var(--text-sm);line-height:1.6;color:var(--muted)}@media(max-width:600px){.reading-range-controls .button,.reading-position-notice .button{min-height:40px}}.course-reading-context p[role=status],.course-reading-context .reading-range-end{display:block}}@layer tokens{:root{--paper-0: #fffefb;--paper-1: #faf8f3;--paper-2: 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var(--seal-paper);--diagram-ink: var(--ink);--diagram-muted: var(--line-strong);--diagram-guide: var(--muted);--diagram-highlight: var(--pen);--diagram-open: var(--surface);--level-unrated: var(--line-strong);--level-unrated-ink: var(--muted);--radius-tag: 3px;--radius-control: 6px;--radius-panel: 6px;--radius-float: 10px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--space-12: 48px;--text-xs: 12px;--text-sm: 13px;--text-ui: 14px;--text-title: 16px;--text-h3: 17px;--text-h2: 22px;--text-h1: 28px;--text-display: 36px;--text-reading: 17px;--text-code: 16px;--reading-width: 850px;--note-width: 228px;--z-raised: 1;--z-sticky: 20;--z-drawer: 40;--z-overlay: 70;--z-sheet: 71;--z-dialog: 80;--z-toast: 95;--z-tooltip: 1200;--motion-fast: .14s;--motion-normal: .2s;--motion-expand: .3s;--motion-press: .1s;--motion-exit: .12s;--motion-stamp: .26s;--motion-hover: .1s;--motion-reader: .22s;--motion-route: .26s;--ease-out: cubic-bezier(.22, 1, .36, 1);--ease-spring: linear( 0, .42 10%, .9 22%, 1.06 32%, 1.07 40%, 1.02 55%, .99 70%, 1 );--font-display: "Bookshelf Serif", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "STSong", serif;--font-ui: "PingFang SC", -apple-system, BlinkMacSystemFont, "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-code: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--blue: var(--accent);--blue-hover: var(--accent-strong);--blue-light: var(--accent-soft);--blue-border: var(--accent-border);--blue-surface: var(--surface-subtle);--green: var(--success)}:root[data-theme=dark]{color-scheme:dark;--lv-red: oklch(.68 .19 25);--lv-red-ink: oklch(.8 .11 25);--lv-orange: oklch(.76 .15 58);--lv-orange-ink: oklch(.83 .1 60);--lv-yellow: oklch(.86 .14 92);--lv-yellow-ink: oklch(.88 .1 92);--lv-green: oklch(.74 .15 145);--lv-green-ink: oklch(.83 .1 145);--lv-cyan: oklch(.76 .1 205);--lv-cyan-ink: oklch(.83 .07 205);--lv-blue: oklch(.68 .14 258);--lv-blue-ink: oklch(.8 .09 258);--lv-purple: oklch(.68 .16 305);--lv-purple-ink: oklch(.8 .1 305);--lv-black: oklch(.94 0 0);--lv-black-ink: oklch(.94 0 0);--canvas: var(--board-1);--surface: var(--board-1);--surface-subtle: var(--board-2);--surface-hover: var(--board-2);--surface-float: var(--board-float);--field: var(--board-2);--state-hover: var(--board-2);--state-selected: var(--board-3);--ink: var(--chalk-1);--ink-soft: var(--chalk-2);--muted: var(--chalk-3);--faint: var(--chalk-4);--line: var(--board-rule-1);--line-strong: var(--board-rule-2);--control-border: var(--chalk-4);--accent: var(--chalk-1);--accent-strong: #ffffff;--accent-soft: var(--board-3);--accent-border: var(--board-rule-2);--on-accent: var(--board-1);--success: #7cc79a;--success-soft: #24392e;--warning: #e3b56f;--warning-soft: #3a3326;--danger: #f1a3ac;--danger-soft: #3f2a2e;--info: #9ebed8;--violet: #c4aedb;--pen: var(--cinnabar-chalk);--pen-ink: var(--cinnabar-chalk-soft);--overlay: rgb(8 12 10 / 62%);--shadow-float: 0 1px 2px rgb(0 0 0 / 30%), 0 16px 40px rgb(0 0 0 / 40%);--focus-ring: var(--chalk-1);--code-string: #7cced2}@media(max-width:767px){:root{--text-reading: 16px;--text-code: 15px}}@supports not (color: oklch(0 0 0)){:root{--lv-red: #e64343;--lv-red-ink: #a12628;--lv-orange: #f08a2a;--lv-orange-ink: #964d09;--lv-yellow: #edc23e;--lv-yellow-ink: #7d5e07;--lv-green: #4db155;--lv-green-ink: #256c2c;--lv-cyan: #2cb2bf;--lv-cyan-ink: #056774;--lv-blue: #3475d3;--lv-blue-ink: #1351a6;--lv-purple: #8c4ac8;--lv-purple-ink: #6c329f;--lv-black: #242424;--lv-black-ink: #1f1f1f}:root[data-theme=dark]{--lv-red: #f75d59;--lv-red-ink: #fda19a;--lv-orange: #f79643;--lv-orange-ink: #f8b884;--lv-yellow: #f2ce59;--lv-yellow-ink: #efd689;--lv-green: #68c36d;--lv-green-ink: #9ed99f;--lv-cyan: #57c3cf;--lv-cyan-ink: #90d5dd;--lv-blue: #5f99ed;--lv-blue-ink: #9ac0f8;--lv-purple: #b07be6;--lv-purple-ink: #cdaef2;--lv-black: #ebebeb;--lv-black-ink: #ebebeb}}}@layer base{:root{font-family:var(--font-ui);color:var(--ink);background:var(--canvas);font-size:var(--text-ui);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}a{color:var(--blue-hover);text-decoration:none}h1,h2,h3,h4,p{margin:0}h1{font-size:var(--text-h1);line-height:1.35;font-weight:700;letter-spacing:.02em}h2{font-size:21px;font-weight:600;line-height:1.5}h3{font-size:var(--text-h3);font-weight:600}h4{font-size:var(--text-sm);font-weight:600}p{line-height:1.75}small{font-size:var(--text-sm)}label{display:flex;flex-direction:column;gap:7px;color:var(--ink);font-size:var(--text-sm)}input:not([type=checkbox]):not([type=radio]):not([type=file]),select,textarea{background:var(--field);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius-control);padding:9px 11px;min-width:0;max-width:100%;border-color:var(--control-border)}input::placeholder,textarea::placeholder{color:var(--muted)}textarea{resize:vertical;line-height:1.7}input[type=checkbox],input[type=radio]{accent-color:var(--blue);width:15px;height:15px;flex-shrink:0;margin:0}select{padding-right:28px}pre{font-size:var(--text-sm);line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;font-family:var(--font-code)}body{color:var(--ink)}button,a{touch-action:manipulation}button,a,input,textarea,select{transition:color var(--motion-hover) var(--ease-out),background-color var(--motion-hover) var(--ease-out),border-color var(--motion-hover) var(--ease-out),box-shadow var(--motion-hover) var(--ease-out),transform var(--motion-press) var(--ease-out)}:root[data-theme-switching] *,:root[data-theme-switching] *:before,:root[data-theme-switching] *:after{transition:none!important}input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}::selection{background:var(--accent);color:var(--on-accent)}*{scrollbar-width:thin;scrollbar-color:var(--accent-border) transparent}svg{stroke-width:1.65;flex-shrink:0}kbd{font:11px/1.6 var(--font-code);color:var(--muted);border:1px solid var(--line);border-radius:var(--radius-control);padding:0 4px}:root{line-break:strict}h1,.display-title{font-family:var(--font-display);text-wrap:balance}.markdown-body h1{font-family:inherit}p,li,.markdown-body{text-autospace:normal}code,kbd,pre,samp{font-variant-numeric:tabular-nums}}@layer components{.seal{--seal-size: 26px;display:inline-grid;place-items:center;flex:none;inline-size:var(--seal-size);block-size:var(--seal-size);border-radius:var(--radius-tag);background:var(--seal-bg);color:var(--seal-ink);font:700 calc(var(--seal-size) * .58) / 1 var(--font-display);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--seal-ink) 22%,transparent);-webkit-user-select:none;user-select:none}.stamp{display:inline-grid;place-items:center;flex:none;min-inline-size:52px;block-size:26px;padding:0 var(--space-2);border:2px solid var(--success);border-radius:var(--radius-tag);color:var(--success);font:700 var(--text-ui) / 1 var(--font-display);letter-spacing:.08em;box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--success) 18%,transparent);-webkit-user-select:none;user-select:none}.stamp[data-fresh],.solved-mark[data-fresh=true],.outline-number[data-fresh]{animation:stamp var(--motion-stamp) var(--ease-spring) both}@keyframes stamp{0%{opacity:0;transform:scale(1.15) rotate(-3deg)}to{opacity:1;transform:none}}.problem-cells{display:flex;flex-wrap:wrap;gap:var(--space-1);min-width:0}.problem-cell{inline-size:10px;block-size:14px;border:1.5px solid var(--rating-ink);border-radius:var(--radius-tag)}.problem-cell[data-ac]{background:var(--rating-color)}.problem-cell[data-optional]{border-style:dashed}.problem-cell[data-unavailable]{border-style:dotted;border-color:var(--faint);background:none}}@layer patterns{.page-head{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:var(--space-2) var(--space-8);padding-bottom:var(--space-4);border-bottom:2px solid var(--ink)}.page-kicker{grid-column:1 / -1;margin:0;color:var(--muted);font-size:var(--text-xs);letter-spacing:.16em}.page-title{margin:0;font-family:var(--font-display);font-size:var(--text-display);font-weight:700;line-height:1.2;letter-spacing:.02em}.page-meta{margin:0;color:var(--muted);font-variant-numeric:tabular-nums}.page-meta b{color:var(--ink);font:600 var(--text-ui) var(--font-code)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);border-bottom:1px solid var(--line)}.tabs{display:flex;gap:var(--space-6);min-width:0;overflow-x:auto;scrollbar-width:none}.tab{flex:none;padding:var(--space-3) 0 var(--space-2);border:0;border-bottom:2px solid transparent;border-radius:0;background:none;color:var(--muted);white-space:nowrap}.tab[aria-pressed=true],.tab[aria-selected=true]{border-bottom-color:var(--ink);color:var(--ink);font-weight:600}.tab[data-empty=true]{color:var(--muted)}.tab .n{margin-left:calc(var(--space-1) * 1.5);color:var(--muted);font:var(--text-xs) var(--font-code)}@media(hover:hover){.tab:hover{color:var(--ink)}}.underline-search{display:flex;flex-direction:row;align-items:center;gap:var(--space-2);width:260px;padding:var(--space-2) 0;border-bottom:1px solid var(--line-strong);color:var(--muted)}.underline-search input{flex:1;min-width:0;padding:0;border:0;border-radius:0;outline:0;background:transparent;color:var(--ink)}.underline-search:focus-within{border-color:var(--ink)}.underline-search kbd{flex:none}.ink-link{display:inline-flex;align-items:center;gap:calc(var(--space-1) * 1.5);padding:0;border:0;border-bottom:1px solid var(--ink);border-radius:0;background:none;color:var(--ink);font-weight:600;white-space:nowrap}@media(max-width:767px){.page-head{grid-template-columns:minmax(0,1fr)}.page-title{font-size:var(--text-h1)}.toolbar{flex-direction:column;align-items:stretch;gap:0}.underline-search{width:100%}}}@layer pages{button:disabled{cursor:not-allowed;opacity:.45}@media(hover:hover){a:hover{text-decoration:underline}}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.muted,.hint{color:var(--muted)}.hint{font-size:var(--text-sm);line-height:1.65}.required{color:var(--danger)}.preserve-text{white-space:pre-wrap;overflow-wrap:anywhere}.grow{flex:1}.push-left{margin-right:auto}.button{border:1px solid var(--line-strong);background:transparent;color:var(--ink);border-radius:var(--radius-control);min-height:40px;padding:9px 14px;display:inline-flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap;font-size:var(--text-ui);font-weight:500;line-height:1.3}@media(hover:hover){.button:hover:not(:disabled){border-color:var(--ink)}}.button.primary{background:var(--blue);border-color:var(--blue);color:var(--on-accent)}@media(hover:hover){.button.primary:hover:not(:disabled){background:var(--blue-hover);border-color:var(--blue-hover)}}.button.danger{background:var(--danger);border-color:var(--danger);color:var(--on-accent)}@media(hover:hover){.button.danger:hover:not(:disabled){border-color:var(--danger)}}.button.small{min-height:30px;padding:6px 10px;font-size:var(--text-sm)}.button.pressed{color:var(--ink);border-color:var(--ink);background:var(--state-selected)}.icon-button{display:inline-flex;align-items:center;justify-content:center;padding:6px;border:0;background:transparent;border-radius:var(--radius-control);color:var(--muted);line-height:1;width:36px;height:36px}@media(hover:hover){.icon-button:hover:not(:disabled){background:var(--surface-hover);color:var(--ink)}}.text-button{border:0;background:none;padding:3px 0;display:inline-flex;align-items:center;gap:5px;color:var(--blue-hover);font-size:var(--text-sm);line-height:1.4;white-space:nowrap}@media(hover:hover){.text-button:hover{text-decoration:underline}}.danger-text{color:var(--danger)}@media(hover:hover){.icon-button.danger-text:hover{color:var(--danger);background:var(--danger-soft)}}.section-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.section-header h2,.section-header h3{display:flex;align-items:center;gap:8px}.app-shell{height:100dvh;display:grid;grid-template-columns:220px minmax(0,1fr);overflow:hidden}.app-shell.reading-page{grid-template-columns:minmax(0,1fr)}.reading-page>.sidebar,.main-workspace[hidden]{display:none}.sidebar{background:var(--blue-surface);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0;z-index:12}.brand{display:flex;align-items:center;gap:11px;padding:28px 22px 25px;color:var(--ink)}@media(hover:hover){.brand:hover{text-decoration:none}}.brand-mark{width:36px;height:36px;display:flex;align-items:center;justify-content:center;color:var(--on-accent);background:var(--blue);border-radius:var(--radius-control);flex-shrink:0}.brand strong{display:block;font-size:19px;letter-spacing:-.7px;font-weight:600}.brand small{display:block;font-size:var(--text-sm);color:var(--muted);letter-spacing:0;margin-top:5px}.sidebar-nav{overflow:visible;flex:0 0 auto;padding:0 12px 16px}.nav-main{padding-bottom:14px;border-bottom:1px solid var(--line)}.nav-item{width:100%;border:0;background:transparent;border-radius:var(--radius-control);padding:10px 11px;display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink);text-align:left;margin-bottom:3px}@media(hover:hover){.nav-item:hover{background:var(--surface-hover)}}.nav-item.active{color:var(--blue-hover);background:var(--accent-soft);box-shadow:inset 3px 0 var(--blue);font-weight:600}.nav-item>span:nth-child(2){flex:1}.nav-count{font-size:var(--text-sm);min-width:20px;text-align:right;font-variant-numeric:tabular-nums;color:var(--muted)}.nav-item.active .nav-count{color:var(--blue-hover)}.pending-dot{width:6px;height:6px;background:var(--blue);border-radius:50%;margin-right:6px}.sidebar-bottom{padding:10px 12px 17px;border-top:1px solid var(--line)}.local-status{display:flex;align-items:center;gap:7px;font-size:var(--text-sm);color:var(--muted);padding:14px 10px 0}.local-status>span{width:5px;height:5px;border-radius:50%;background:var(--success)}.local-status>span.offline{background:var(--warning)}.local-status svg{margin-left:auto}.main-workspace{padding:22px 28px 0;display:flex;flex-direction:column;min-height:0;min-width:0;position:relative;overflow:hidden;background:var(--surface)}.workspace-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:14px;flex-shrink:0}.workspace-heading{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 16px}.workspace-header p{font-size:var(--text-sm);color:var(--muted);margin-top:0}.workspace-header>.button{margin-top:0}.breadcrumb{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:var(--text-sm);margin-bottom:14px;line-height:1.6}.search-toolbar{display:flex;gap:9px;margin-bottom:8px;flex-shrink:0}.search-input{border:1px solid var(--line);border-radius:var(--radius-control);display:flex;align-items:center;gap:9px;padding:0 12px;background:var(--surface);min-width:0}.search-input svg{color:var(--muted);flex-shrink:0}.search-input input:not([type=checkbox]):not([type=radio]):not([type=file]){border:0;background:none;padding:10px 0;outline:0;min-width:0;width:100%;font-size:14px;box-shadow:none}.search-input:focus-within{border-color:var(--blue)}.button-count{font-size:var(--text-sm);background:var(--accent-soft);color:var(--blue-hover);min-width:17px;height:17px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-control)}.oj-filter{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding-bottom:8px;border-bottom:1px solid var(--line);flex-shrink:0}.filter-label{font-size:var(--text-sm);color:var(--muted);margin-right:8px;white-space:nowrap}.oj-chip{border:0;background:none;color:var(--muted);border-radius:var(--radius-control);font-size:var(--text-sm);padding:5px 10px;line-height:1.5}@media(hover:hover){.oj-chip:hover{background:var(--blue-surface)}}.oj-chip.selected{background:var(--blue-light);color:var(--blue-hover);font-weight:600}.more-ojs{color:var(--muted);padding-left:5px;font-size:var(--text-sm)}.filter-panel{background:var(--canvas);padding:17px 16px 15px;border-bottom:1px solid var(--line);max-height:350px;overflow:auto;flex-shrink:0}.quick-difficulty{display:flex;align-items:center;flex-wrap:wrap;flex-shrink:0;gap:8px;padding:8px 0;border-bottom:1px solid var(--line)}.quick-difficulty select{max-width:230px;min-width:120px;font-size:var(--text-sm);padding:5px 25px 5px 8px}.quick-difficulty .text-button{font-size:var(--text-sm)}.table-rating-source{font-size:var(--text-sm);color:var(--muted)}@media(hover:hover){.table-rating-source:hover{color:var(--blue-hover);text-decoration:underline}}.filter-section{display:flex;align-items:center;gap:10px;min-height:30px;margin-bottom:13px}.filter-section .hint{font-size:var(--text-sm)}.segmented{display:flex;border:1px solid var(--line);padding:2px;border-radius:var(--radius-control);background:var(--surface)}.segmented button{background:none;border:0;padding:4px 10px;font-size:var(--text-sm);border-radius:var(--radius-tag);color:var(--muted)}.segmented button.selected{background:var(--blue-light);color:var(--blue-hover)}.topic-filter{flex-wrap:wrap}.topic-filter select{font-size:var(--text-sm);padding:6px 25px 6px 9px;min-width:160px;max-width:260px}.selected-tags,.tags{display:flex;gap:6px;flex-wrap:wrap}.tag{display:inline-flex;align-items:center;gap:4px;background:var(--surface-subtle);color:var(--muted);font-size:var(--text-sm);line-height:1.5;padding:3px 6px;border-radius:var(--radius-control);white-space:nowrap;border:0}.tag-selected{background:var(--accent-soft);color:var(--blue-hover)}.tag-excluded{background:var(--danger-soft);color:var(--danger)}.rating-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-top:13px;border-top:1px solid var(--line)}.rating-heading strong{font-size:var(--text-sm);font-weight:600}.rating-heading .hint{display:block;margin-top:4px;font-size:var(--text-sm)}.rating-clauses{padding:6px 0}.rating-clause{display:flex;flex-wrap:wrap;align-items:center;gap:7px;padding:7px 0}.clause-or{font-size:var(--text-sm);color:var(--muted);width:26px}.rating-clause select{font-size:var(--text-sm);padding:6px 25px 6px 8px;max-width:210px}.range-input{display:flex;align-items:center;gap:7px;font-size:var(--text-sm);color:var(--muted)}.range-input input:not([type=checkbox]){width:84px;padding:6px 8px;font-size:var(--text-sm)}.level-choices{display:flex;flex-wrap:wrap;gap:5px}.check-pill{display:inline-flex;align-items:center;flex-direction:row;gap:4px;font-size:var(--text-sm);white-space:nowrap;border:1px solid var(--line);padding:5px;border-radius:var(--radius-control);background:var(--surface)}.check-pill input{width:12px;height:12px}.checkbox-line{display:flex;flex-direction:row;align-items:center;gap:7px;font-size:var(--text-sm);line-height:1.7}.result-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 0;font-size:var(--text-sm);flex-shrink:0}.result-toolbar strong{font-weight:600;font-variant-numeric:tabular-nums}.clear-filters{margin-left:11px;color:var(--muted);font-size:var(--text-sm)}.sort-control{display:flex;align-items:center;gap:8px;color:var(--muted)}.sort-control select{border:0;background:none;padding:5px 20px 5px 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.graph-node{position:absolute;display:grid;align-content:center;gap:0;padding:var(--space-1) var(--space-2);border:1.5px solid var(--rating-ink);border-radius:var(--radius-control);background:var(--canvas);color:var(--ink);text-align:left}.graph-node[data-optional]{border-style:dashed}.graph-node[data-ac]{box-shadow:inset 4px 0 0 var(--rating-color)}.graph-node span,.graph-node small{line-height:1.45}.graph-node span{overflow:hidden;font-size:var(--text-sm);font-weight:600;text-overflow:ellipsis;white-space:nowrap}.graph-node small{color:var(--muted);font-size:var(--text-xs)}@media(hover:hover){.learn-content .graph-node:hover:not(:disabled){background:var(--state-hover)}}@media(max-width:767px){.route-head{grid-template-columns:minmax(0,1fr)}.learn-content .route-head .course-diagram{grid-row:1}.learn-content .route-head .course-diagram svg{width:200px}.learn-content .route-head .course-diagram-caption{text-align:left}.route-toolbar .course-table-search{width:100%}}}@layer pages{.personal-label{margin:0 0 var(--space-3);color:var(--muted);font-size:var(--text-xs);font-weight:500;letter-spacing:.14em}.catalog .personal-next{margin-top:var(--space-6);padding-bottom:var(--space-6);border-bottom:1px solid var(--line)}.personal-next-main{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:var(--space-4) var(--space-8)}.catalog .personal-next-course{color:var(--muted);font-size:var(--text-sm)}.catalog .personal-next-title{margin:var(--space-1) 0;font-family:var(--font-display);font-size:var(--text-h1);font-weight:700;line-height:1.3;letter-spacing:.02em}.catalog .personal-next-meta{color:var(--muted);font-size:var(--text-sm)}.personal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--space-8);margin-top:var(--space-8)}.personal-list{display:grid;margin:0;padding:0;list-style:none}.personal-next .personal-list{margin-top:var(--space-4)}.personal-list 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var(--space-4);color:var(--muted)}.activity-weeks{display:flex;gap:var(--space-1)}.activity-week{display:grid;gap:var(--space-1)}.activity-week i{width:14px;height:14px;border:1px solid var(--line-strong);border-radius:var(--radius-tag)}.activity-week i[data-level="1"]{border-color:var(--success);background:color-mix(in srgb,var(--success) 35%,transparent)}.activity-week i[data-level="2"]{border-color:var(--success);background:color-mix(in srgb,var(--success) 65%,transparent)}.activity-week i[data-level="3"]{border-color:var(--success);background:var(--success)}.activity-week i[data-level=future]{border-style:dashed;border-color:var(--line)}}