:root{font-family:Inter,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-synthesis:none;font-weight:400;font-size:14px;color-scheme:light;--canvas: #f6f7f9;--surface: #ffffff;--surface-muted: #f3f4f6;--text: #111827;--text-secondary: #4b5563;--text-muted: #6b7280;--border: #e5e7eb;--border-strong: #cbd5e1;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-soft: #eff6ff;--accent-border: #bfdbfe;--accent-medium: #93c5fd;--warning: #92400e;--warning-soft: #fffbeb;--warning-border: #fde68a;--icon: #64748b;--icon-surface: #f1f5f9;--shadow-color: #11182708;--shadow-overlay: #1118271a;--backdrop: #11182755;--radius-card: 8px;--radius-control: 6px;--font-caption: 12px;--font-small: 13px;--font-ui: 14px;--font-card-title: 15px;--font-section: 16px;--font-reading: 16px;--font-code: 13px;color:var(--text);background:var(--canvas)}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button{color:inherit}a{color:inherit;text-decoration:none}button{border:0;background:none}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600}a,button,input,textarea,select{outline-offset:4px}:focus-visible{outline:2px solid var(--accent)}svg{flex-shrink:0}button svg,a svg{vertical-align:middle}button{transition:background .18s,color .18s,border-color .18s,box-shadow .18s}::selection{background:var(--accent-border)}::placeholder{color:var(--text-secondary)}button:disabled:hover{transform:none}input,select,textarea{min-width:0}a:hover{color:var(--accent)}.app-shell{display:flex;min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;background:var(--surface);border-right:1px solid var(--border);padding:34px 20px 18px;display:flex;flex-direction:column;z-index:20;overflow-y:auto;scrollbar-width:thin}.brand{display:flex;align-items:center;gap:11px;padding-left:11px;font-size:25px;letter-spacing:3px;font-weight:650}.brand-mark{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);border-radius:var(--radius-card);width:43px;height:43px;color:var(--surface);box-shadow:0 3px 7px var(--shadow-color)}.brand-subtitle{display:block;font-size:var(--font-caption);font-weight:400;letter-spacing:.6px;color:var(--text-muted);margin-top:3px}.workspace-chip{display:flex;align-items:center;gap:7px;margin:31px 2px 30px;padding:10px 8px;border:1px solid var(--border);border-radius:var(--radius-card);font-size:var(--font-caption);color:var(--text-secondary);white-space:nowrap;flex-wrap:wrap;row-gap:6px}.mini-dot{width:6px;height:6px;border-radius:50%;display:inline-block;background:var(--accent);flex-shrink:0}.tiny-label{padding:2px 4px;border:1px solid var(--border);border-radius:3px;margin-left:auto;font-size:var(--font-caption);color:var(--text-muted)}.nav-section-label{font-size:var(--font-caption);color:var(--text-muted);letter-spacing:1px;padding:0 13px;margin-bottom:12px}.nav-item{display:flex;align-items:center;gap:12px;font-size:var(--font-ui);height:44px;padding:0 13px;border-radius:var(--radius-control);color:var(--text-secondary);margin:4px 0}.nav-item svg{stroke-width:1.65}.nav-item:hover{background:var(--surface-muted)}.nav-item.active{background:var(--accent-soft);color:var(--accent-hover);font-weight:600}.nav-count{margin-left:auto;font-size:var(--font-caption);background:var(--surface);border-radius:4px;padding:2px 5px}.topic-label{margin-top:29px;display:flex;justify-content:space-between}.topic-label span{color:var(--text-muted);letter-spacing:0}.topic-nav a{display:flex;align-items:center;gap:10px;font-size:var(--font-ui);color:var(--text-secondary);padding:9px 13px;border-radius:var(--radius-control)}.topic-nav a>span:last-child{margin-left:auto;font-size:var(--font-caption);color:var(--text-muted)}.topic-nav a:hover,.topic-nav a.selected{background:var(--accent-soft);color:var(--accent)}.topic-dot{width:6px;height:6px;border-radius:2px;display:inline-block;flex-shrink:0}.topic-dot.green,.topic-dot.blue,.topic-dot.purple,.topic-dot.orange,.topic-dot.red{background:var(--icon)}.sidebar-bottom{margin-top:auto;padding-top:29px}.sidebar-note{margin:0 8px 22px;padding:17px 12px;background:var(--surface-muted);border:1px solid var(--border);border-radius:var(--radius-control);color:var(--text-secondary)}.sidebar-note svg{margin-bottom:9px}.sidebar-note p{font-size:var(--font-caption);line-height:1.9}.sidebar-bottom>a{display:flex;gap:7px;align-items:center;color:var(--text-secondary);font-size:var(--font-caption);padding:0 6px;line-height:1.6}.sidebar-bottom>a svg:last-child{margin-left:auto}.sidebar-bottom>button{display:flex;gap:5px;align-items:center;margin:14px auto 0;color:var(--text-secondary);font-size:var(--font-caption)}.main-shell{margin-left:238px;min-width:0;width:calc(100% - 238px)}.topbar{height:76px;border-bottom:1px solid var(--border);background:var(--surface);display:flex;align-items:center;justify-content:space-between;padding:0 42px;gap:16px}.breadcrumb{display:flex;align-items:center;gap:12px;font-size:var(--font-caption);color:var(--text-secondary);white-space:nowrap}.breadcrumb strong{font-weight:500;color:var(--text)}.topbar-right{display:flex;align-items:center;gap:26px}.global-search{display:flex;align-items:center;gap:9px;background:var(--surface-muted);border:1px solid var(--border-strong);border-radius:var(--radius-control);padding:8px 10px;width:276px;color:var(--text-secondary)}.global-search input{border:0;background:none;width:100%;font-size:var(--font-small);outline:none;color:var(--text)}.global-search:focus-within{border-color:var(--accent)}.global-search kbd{font-size:var(--font-caption);white-space:nowrap;border:1px solid var(--border);border-radius:3px;padding:2px 4px;line-height:1.2;color:var(--text-secondary)}.avatar{width:31px;height:31px;border-radius:50%;display:grid;place-items:center;background:var(--surface-muted);border:3px solid var(--border);color:var(--text-secondary);font-size:var(--font-caption)}.main-content{padding:27px 42px 0;max-width:1500px;margin:0 auto;min-height:calc(100vh - 76px)}.welcome-line{display:flex;justify-content:space-between;font-size:var(--font-caption);color:var(--text-secondary);align-items:center;margin-bottom:20px}.welcome-line>span:first-child{display:flex;align-items:center;gap:8px;color:var(--text-secondary)}.welcome-line .mini-dot{width:5px;height:5px}.hero{position:relative;display:flex;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:32px 36px 26px;min-height:290px;overflow:hidden}.hero-copy{position:relative;z-index:2;flex-shrink:1;min-width:0}.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:var(--font-caption);letter-spacing:2px;color:var(--text-secondary);font-weight:600}.hero h1{font-size:35px;letter-spacing:2.2px;line-height:1.55;margin-top:12px;font-weight:600;color:var(--text)}.hero h1>span{color:var(--text)}.hero p{font-size:var(--font-ui);line-height:1.9;color:var(--text-secondary);margin-top:12px}.hero-actions{display:flex;gap:21px;align-items:center;margin-top:22px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:var(--radius-control);padding:10px 16px;font-size:var(--font-ui);min-height:40px;font-weight:500;line-height:1.4;white-space:nowrap}.button.primary{background:var(--accent);color:var(--surface);border-color:var(--accent);box-shadow:0 2px 3px var(--shadow-color)}.button.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.button.secondary{background:var(--surface);border-color:var(--border-strong);color:var(--text-secondary)}.button.secondary:hover{background:var(--accent-soft);border-color:var(--border-strong)}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:5px;font-size:var(--font-small);color:var(--accent-hover);padding:4px 0}.text-button:hover{color:var(--accent-hover)}.hero-caption{display:flex;gap:16px;margin-top:22px;color:var(--text-secondary);font-size:var(--font-caption)}.hero-caption>span{display:flex;align-items:center;gap:4px}.hero-illustration{position:relative;flex:1;min-width:270px;max-width:420px;height:250px;margin:-8px -10px -6px 15px;transform:scale(.96);flex-shrink:0}.hero-illustration>svg{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.illustration-card{position:absolute;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:0 12px 25px var(--shadow-color)}.card-back{width:170px;height:126px;right:32px;top:34px;transform:rotate(9deg);padding:16px}.fake-code{display:flex;gap:4px;margin-bottom:13px}.fake-code i{width:4px;height:4px;border-radius:50%;background:var(--border-strong)}.card-back>span{display:block;color:var(--text-secondary);font-size:var(--font-caption);margin-bottom:9px}.card-back>code{font-size:var(--font-caption);color:var(--text-secondary)}.card-front{width:178px;height:184px;left:54px;top:59px;transform:rotate(-9deg);padding:18px}.mini-book{color:var(--accent-hover);display:block;margin-bottom:11px}.card-front strong{font-weight:500;font-size:var(--font-small);color:var(--text)}.fake-line{width:60%;height:4px;background:var(--surface-muted);margin-top:8px;border-radius:2px}.fake-line.long{width:93%;margin-top:15px}.illustration-check{display:inline-flex;gap:4px;align-items:center;font-size:var(--font-caption);color:var(--accent-hover);margin-top:17px}.floating-check{position:absolute;right:63px;bottom:20px;background:var(--surface);border:1px solid var(--border);border-radius:50%;width:39px;height:39px;display:grid;place-items:center;color:var(--accent-hover);box-shadow:0 4px 12px var(--shadow-color)}.illustration-spark{position:absolute;left:45px;top:28px;color:var(--text-secondary)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:20px}.stat-card{text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:17px 18px 14px}.stat-card:hover{border-color:var(--border-strong);box-shadow:0 3px 9px var(--shadow-color)}.stat-label{display:flex;align-items:center;justify-content:space-between;font-size:var(--font-caption);color:var(--text-secondary);line-height:1.6}.stat-icon{width:28px;height:28px;border-radius:var(--radius-card);display:grid;place-items:center}.green,.blue,.purple,.orange,.red{color:var(--icon);background:var(--icon-surface)}.stat-number{font-size:32px;font-weight:600;letter-spacing:-1px;margin-top:8px;font-variant-numeric:tabular-nums;color:var(--text)}.stat-number>span{font-size:var(--font-caption);font-weight:400;color:var(--text-secondary);margin-left:8px;letter-spacing:0}.stat-card p{font-size:var(--font-caption);color:var(--text-secondary);margin-top:8px;line-height:1.7}.dashboard-columns{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:26px;margin-top:32px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:18px}.section-heading h2{font-size:var(--font-section);display:flex;gap:8px;align-items:center;letter-spacing:.2px}.section-heading p{font-size:var(--font-caption);color:var(--text-secondary);margin-top:8px;line-height:1.8}.section-heading>.text-button{white-space:nowrap}.muted-badge{font-size:var(--font-caption);background:var(--surface-muted);border:1px solid var(--border);border-radius:3px;padding:3px 6px;color:var(--text-secondary);font-weight:400;letter-spacing:.5px;margin-left:3px}.topics-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.topic-card{text-align:left;padding:20px 18px 18px;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface);transition:border-color .18s,box-shadow .18s}.topic-card:hover{border-color:var(--border-strong);box-shadow:0 5px 15px var(--shadow-color)}.topic-card-top{display:flex;align-items:center;justify-content:space-between}.topic-card-top>svg{color:var(--text-muted)}.icon-badge{display:inline-flex;width:41px;height:41px;border-radius:var(--radius-card);align-items:center;justify-content:center}.icon-badge.small{width:33px;height:33px}.topic-card h3{font-size:var(--font-card-title);margin-top:15px}.topic-card>p{font-size:var(--font-small);color:var(--text-secondary);line-height:1.8;margin-top:8px;min-height:46px}.topic-card-meta{display:flex;justify-content:space-between;gap:5px;margin-top:21px;font-size:var(--font-caption);color:var(--text-secondary);flex-wrap:wrap;row-gap:6px}.topic-card-meta>span:last-child{color:var(--text-muted)}.progress-track{height:3px;background:var(--surface-muted);border-radius:3px;overflow:hidden;margin-top:9px}.progress-track>span{height:100%;background:var(--accent);display:block;border-radius:3px}.recommended-section{margin-top:30px}.orange-text{color:var(--accent-hover)}.recommendations{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface);padding:0 17px}.recommendation{display:flex;align-items:center;text-align:left;gap:13px;width:100%;padding:18px 0;border-bottom:1px solid var(--border)}.recommendation:last-child{border:0}.recommendation:hover h3{color:var(--accent)}.question-number{font-size:13px;font-weight:500;color:var(--text-muted);font-variant-numeric:tabular-nums;align-self:flex-start;margin-top:1px}.recommendation>div{flex:1;min-width:0}.recommendation h3{font-size:var(--font-card-title);font-weight:500;line-height:1.8}.recommendation p{display:flex;gap:7px;font-size:var(--font-small);color:var(--text-secondary);margin-top:6px;flex-wrap:wrap;line-height:1.7}.recommendation p>span:last-child{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.recommendation>svg{color:var(--text-muted)}.difficulty{display:inline-flex;font-size:var(--font-caption);white-space:nowrap;padding:3px 6px;border-radius:3px}.difficulty.basic,.difficulty.intermediate{color:var(--text-secondary);background:var(--surface-muted)}.difficulty.advanced{color:var(--warning);background:var(--warning-soft)}.dashboard-aside{display:flex;flex-direction:column;gap:18px}.daily-card{padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);text-align:center}.daily-card .section-heading{margin-bottom:7px}.daily-card .section-heading h2{font-size:var(--font-section)}.daily-card .section-heading>svg{color:var(--text-secondary)}.goal-ring{width:128px;height:128px;background:conic-gradient(var(--accent) var(--progress),var(--surface-muted) 0);border-radius:50%;margin:20px auto 18px;padding:7px}.goal-ring>div{border-radius:50%;background:var(--surface);height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px}.goal-ring strong{font-size:32px;font-weight:500;letter-spacing:-.5px}.goal-ring strong>span{font-size:14px;color:var(--text-muted);font-weight:400}.goal-ring div>span{font-size:var(--font-caption);color:var(--text-muted)}.daily-card>h3{font-size:var(--font-ui);font-weight:500}.daily-card>p{font-size:var(--font-small);color:var(--text-secondary);margin:9px 0 18px;line-height:1.8}.full-width{width:100%}.daily-setting{display:flex;justify-content:center;align-items:center;gap:5px;font-size:var(--font-caption);color:var(--text-secondary);margin-top:12px}.daily-setting select{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;font-size:var(--font-caption);color:var(--text-secondary);padding:3px;cursor:pointer}.rhythm-card{padding:19px 17px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card)}.rhythm-card .section-heading{margin-bottom:9px}.rhythm-card h2{font-size:var(--font-section)}.rhythm-card .section-heading>svg{color:var(--text-secondary)}.rhythm-card>p{font-size:var(--font-small);color:var(--text-secondary);line-height:1.8}.activity-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin:20px 0 12px}.activity-grid>span{background:var(--surface-muted);aspect-ratio:1.15;border-radius:3px}.activity-grid>span.some{background:var(--accent-border)}.activity-grid>span.full{background:var(--accent)}.activity-legend{display:flex;align-items:center;justify-content:space-between;font-size:var(--font-caption);color:var(--text-secondary);flex-wrap:wrap;row-gap:8px}.activity-legend>span:last-child{display:flex;align-items:center;gap:3px}.activity-legend i{background:var(--surface-muted);width:7px;height:7px;border-radius:1px}.activity-legend i:nth-of-type(2){background:var(--accent-border)}.activity-legend i:nth-of-type(3){background:var(--accent)}.learning-tip{padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card)}.learning-tip .eyebrow{color:var(--text-secondary);letter-spacing:1px;font-size:var(--font-caption)}.learning-tip h3{font-size:var(--font-small);line-height:1.9;margin-top:12px;color:var(--text-secondary);font-weight:500}.learning-tip p{font-size:var(--font-small);line-height:1.9;color:var(--text-secondary);margin-top:10px}.tip-line{display:block;width:25px;height:2px;background:var(--border-strong);margin-top:17px}.continue-card{padding:18px;text-align:left;border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-card)}.continue-card>span{display:flex;justify-content:space-between;font-size:var(--font-caption);color:var(--text-secondary)}.continue-card strong{display:block;font-size:var(--font-small);font-weight:500;line-height:1.8;margin-top:10px}.page-footer{margin-top:35px;padding:22px 0;display:flex;justify-content:space-between;border-top:1px solid var(--border);color:var(--text-secondary);font-size:var(--font-caption);gap:14px}.page-footer button{font-size:var(--font-caption);color:var(--text-secondary);display:flex;gap:5px;align-items:center}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-control);color:var(--text-secondary);flex-shrink:0}.icon-button:hover{background:var(--accent-soft);color:var(--accent)}.mobile-menu{display:none}.page-intro{padding:14px 0 29px}.page-intro h1{font-size:28px;line-height:1.6;margin:12px 0 10px;letter-spacing:.5px}.page-intro>p{font-size:var(--font-ui);color:var(--text-secondary);line-height:1.9}.library-panel{border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface);overflow:hidden;min-height:450px}.learning-mode-bar{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:24px}.learning-mode-bar>p{font-size:12px;line-height:1.8;color:var(--text-secondary)}.mode-switch{display:inline-flex;flex-shrink:0;gap:4px;padding:4px;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface-muted)}.mode-switch button{display:flex;align-items:center;justify-content:center;gap:7px;padding:10px 15px;min-height:40px;border-radius:var(--radius-control);color:var(--text-secondary);font-size:var(--font-small)}.mode-switch button[aria-pressed=true]{background:var(--accent-soft);color:var(--accent-hover);box-shadow:0 1px 4px var(--shadow-color);font-weight:600}.reading-mode .markdown-body{font-size:var(--font-reading);line-height:1.9}.reading-mode .markdown-body pre{font-size:var(--font-code)}.reading-mode .answer-card{padding:28px}.reading-mode .key-points li,.reading-mode .pitfall p,.reading-mode .follow-up p{font-size:var(--font-ui);line-height:1.9}.reading-mode [id]{scroll-margin-top:24px}.reading-guide{padding:23px;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface)}.reading-guide h2{font-size:var(--font-section);margin-top:12px}.reading-guide p{font-size:var(--font-caption);color:var(--text-secondary);line-height:1.9;margin-top:10px}.reading-guide nav{display:grid;gap:6px;margin-top:20px}.reading-guide nav button{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;text-align:left;font-size:var(--font-ui);color:var(--accent-hover)}.reading-guide nav button:hover{color:var(--accent-hover);background:var(--accent-soft)}.reading-guide .reading-guide-tip{border-top:1px solid var(--border);padding-top:16px;margin-top:18px}.reading-navigation{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}.reading-navigation button{min-width:0;padding:20px;text-align:left;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface)}.reading-navigation button>span{display:flex;align-items:center;gap:8px;font-size:var(--font-ui);color:var(--accent)}.reading-navigation button>strong{display:block;font-size:var(--font-ui);font-weight:400;line-height:1.9;color:var(--text);margin-top:10px;overflow-wrap:anywhere}.reading-navigation button:not(:disabled):hover{border-color:var(--border-strong);background:var(--surface-muted)}.library-top{padding:0 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px}.filter-tabs{display:flex;gap:25px}.filter-tabs button{display:flex;gap:5px;align-items:center;font-size:var(--font-ui);padding:20px 0;border-bottom:2px solid transparent;color:var(--text-secondary)}.filter-tabs button.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.result-count{font-size:var(--font-caption);color:var(--text-muted)}.library-filters{display:flex;align-items:center;gap:12px;padding:20px 24px;border-bottom:1px solid var(--border);flex-wrap:wrap}.list-search{display:flex;align-items:center;gap:9px;min-width:180px;flex:1;border:1px solid var(--border-strong);border-radius:var(--radius-control);padding:10px 12px;color:var(--text-secondary)}.list-search input{width:100%;border:0;outline:0;font-size:var(--font-ui);color:var(--text)}.list-search:focus-within{border-color:var(--accent)}.list-search button{padding:0;color:var(--text-secondary)}.select-field{display:flex;align-items:center;border:1px solid var(--border-strong);border-radius:var(--radius-control);padding:8px 10px;gap:7px;color:var(--text-secondary)}.select-field select{border:0;background:none;font-size:var(--font-small);color:var(--text-secondary);max-width:150px;padding:2px 0}.question-row{display:flex;align-items:center;gap:14px;margin:0 24px;border-bottom:1px solid var(--border);padding:18px 0}.question-row:last-child{border-bottom:0}.row-index{font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums;width:19px;flex-shrink:0}.question-row-main{text-align:left;flex:1;min-width:0;padding:0}.question-row-title{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.question-row-main h3{font-size:var(--font-card-title);font-weight:500;line-height:1.8;color:var(--text)}.question-row-main:hover h3{color:var(--accent-hover)}.question-row-main p{display:flex;align-items:center;gap:9px;color:var(--text-secondary);font-size:var(--font-caption);margin-top:7px;flex-wrap:wrap}.essential-badge{font-size:var(--font-caption);color:var(--accent-hover);background:var(--accent-soft);display:inline-flex;align-items:center;gap:3px;white-space:nowrap;padding:3px 5px;border-radius:3px}.status-badge{font-size:var(--font-caption);white-space:nowrap;color:var(--text-muted)}.status-badge.mastered{color:var(--accent-hover)}.status-badge.learning{color:var(--warning)}.status-badge.familiar{color:var(--accent-hover)}.saved{color:var(--accent-hover)!important}.bookmark-button.saved svg{fill:var(--accent-border)}.pagination{display:flex;justify-content:space-between;align-items:center;gap:15px;border-top:1px solid var(--border);padding:19px 24px;font-size:var(--font-caption);color:var(--text-secondary)}.pagination>div{display:flex;align-items:center;gap:15px}.pagination .button{font-size:var(--font-caption);min-height:31px;padding:7px 12px}.empty{text-align:center;padding:70px 20px;color:var(--text-secondary)}.empty>svg{margin-bottom:16px}.empty h3,.empty h2{font-size:17px;color:var(--text);font-weight:500}.empty p{margin:13px 0 25px;font-size:var(--font-small);line-height:1.9}.empty>.text-button{margin-left:15px}.review-summary{display:flex;align-items:center;gap:45px;border:1px solid var(--border);background:var(--surface-muted);border-radius:var(--radius-card);padding:27px;margin-bottom:24px}.review-summary>div{display:flex;align-items:center;gap:12px;color:var(--text-secondary)}.review-summary strong{font-size:28px;font-weight:500}.review-summary span{font-size:12px;color:var(--text-secondary)}.review-summary p{font-size:var(--font-caption);line-height:1.9;color:var(--text-secondary);margin-left:auto}.review-date{color:var(--warning);margin-left:6px}.path-notice{display:flex;align-items:center;gap:15px;background:var(--surface-muted);border:1px solid var(--border);border-radius:var(--radius-card);padding:22px 25px;color:var(--text-secondary)}.path-notice p{font-size:var(--font-ui);line-height:1.9;color:var(--text-secondary)}.path-notice strong{color:var(--text);font-weight:500}.learning-paths{padding:34px 0}.path-phase{border-left:1px solid var(--border);margin-left:22px;padding:0 0 37px 35px;position:relative}.path-phase:last-child{border-color:transparent;padding-bottom:0}.phase-heading{display:flex;align-items:center;gap:15px;margin-bottom:19px}.phase-number{position:absolute;left:-23px;top:0;width:45px;height:45px;border-radius:50%;background:var(--accent-soft);border:5px solid var(--canvas);display:grid;place-items:center;font-size:12px;color:var(--accent-hover)}.phase-heading .eyebrow{font-size:var(--font-caption)}.phase-heading h2{font-size:19px;margin-top:4px}.phase-heading p{font-size:var(--font-caption);color:var(--text-secondary);margin-top:7px}.path-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}.path-card{display:flex;align-items:flex-start;gap:17px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:21px;text-align:left;min-width:0}.path-card>div{flex:1;min-width:0}.path-card>svg{color:var(--text-muted)}.path-card h3{font-size:var(--font-card-title)}.path-card p{font-size:var(--font-small);color:var(--text-secondary);margin:9px 0 20px;line-height:1.8}.path-card .path-count{display:block;font-size:var(--font-caption);color:var(--text-muted);margin-top:7px}.path-card:hover{border-color:var(--border-strong)}.study-breadcrumb{display:flex;align-items:center;justify-content:space-between;margin:4px 0 27px}.study-breadcrumb>span{font-size:var(--font-caption);color:var(--text-secondary)}.study-heading{padding-bottom:25px;border-bottom:1px solid var(--border);margin-bottom:25px}.study-tags{display:flex;align-items:center;gap:10px}.study-tags .muted-badge{font-size:var(--font-caption);padding:4px 7px;margin:0}.reading-time{display:flex;align-items:center;gap:5px;font-size:var(--font-caption);color:var(--text-muted)}.study-heading h1{font-size:27px;line-height:1.65;margin:17px 0;overflow-wrap:anywhere}.study-heading-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px}.study-heading-bottom>span{font-size:var(--font-caption);color:var(--text-secondary)}.study-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:24px;align-items:start}.study-primary{display:flex;flex-direction:column;gap:20px;min-width:0}.recall-card,.answer-card,.rating-card{border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-card);padding:23px}.step-dot{display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent-hover);border-radius:50%;width:24px;height:24px;font-size:var(--font-caption);font-weight:500;flex-shrink:0}.recall-card .section-heading h2,.answer-card .section-heading h2{font-size:var(--font-section)}.subtle{font-size:var(--font-caption);color:var(--text-secondary)}.recall-card label{display:block;font-size:var(--font-small);color:var(--text-secondary);margin:0 0 14px;line-height:1.8}textarea{resize:vertical;border:1px solid var(--border-strong);background:var(--surface);border-radius:var(--radius-control);color:var(--text);padding:14px;line-height:1.9;font-size:var(--font-ui);width:100%;min-height:150px}textarea::placeholder{color:var(--text-secondary)}.recall-bottom{display:flex;justify-content:space-between;align-items:center;font-size:var(--font-caption);color:var(--text-secondary);margin-top:9px}.reveal-card{background:var(--surface-muted);border:1px dashed var(--border);border-radius:var(--radius-card);text-align:center;padding:45px 20px}.reveal-icon{border:1px solid var(--border);background:var(--surface-muted);border-radius:50%;width:63px;height:63px;display:grid;place-items:center;color:var(--text-secondary);margin:0 auto 20px}.reveal-card h2{font-size:17px;font-weight:500;color:var(--text)}.reveal-card p{font-size:var(--font-caption);color:var(--text-secondary);line-height:2;margin:13px 0 24px}.reveal-card>span{display:block;font-size:var(--font-caption);color:var(--text-secondary);margin-top:15px}.study-aside{display:flex;flex-direction:column;gap:20px}.study-flow{background:var(--surface);border:1px solid var(--border);padding:23px;border-radius:var(--radius-card)}.study-flow>.eyebrow{font-size:var(--font-caption);letter-spacing:1px}.study-flow>h3{font-size:var(--font-section);margin:11px 0 22px}.study-flow>div{display:flex;align-items:center;gap:12px;margin:20px 0}.study-flow>div:last-child{margin-bottom:0}.study-flow .step-dot{border:1px solid var(--border);background:var(--surface-muted)}.study-flow strong{font-size:var(--font-small);font-weight:500;display:block;color:var(--text)}.study-flow small{display:block;font-size:var(--font-caption);color:var(--text-secondary);margin-top:6px}.study-flow .done .step-dot{color:var(--surface);background:var(--accent)}.note-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:20px}.note-card h2{font-size:var(--font-section)}.note-card .section-heading{color:var(--text);margin-bottom:13px}.note-card label{display:block;font-size:var(--font-small);color:var(--text-secondary);line-height:1.8;margin-bottom:12px}.note-card textarea{min-height:200px;font-size:var(--font-ui);padding:11px}.note-card .button{margin-top:12px}.note-card>small{font-size:var(--font-caption);color:var(--text-muted);display:block;text-align:center;margin-top:11px}.study-source{font-size:var(--font-caption);color:var(--text-secondary);text-align:center;padding:10px}.study-source p{margin:9px 0 12px;color:var(--text-secondary)}.study-source a{display:inline-flex;align-items:center;gap:5px}.key-points{padding:18px 20px;background:var(--accent-soft);border:1px solid var(--accent-border);border-radius:var(--radius-card);margin-bottom:25px}.key-points h3{font-size:var(--font-section);color:var(--accent-hover);display:flex;align-items:center;gap:8px;flex-wrap:wrap}.key-points small{font-size:var(--font-caption);font-weight:400;color:var(--text-secondary);margin-left:auto}.key-points ul{padding-left:17px;font-size:var(--font-ui);line-height:2;color:var(--text-secondary);margin:12px 0 0}.markdown-body{font-size:var(--font-reading);line-height:1.9;color:var(--text);overflow-wrap:anywhere}.markdown-body p,.markdown-body ul,.markdown-body ol,.markdown-body pre,.markdown-body blockquote,.markdown-body table{margin:14px 0}.markdown-body h1,.markdown-body h2{font-size:22px;line-height:1.7;margin:28px 0 12px;color:var(--text)}.markdown-body h3{font-size:18px;margin:25px 0 10px}.markdown-body h4,.markdown-body h5{font-size:16px;margin:20px 0 10px}.markdown-body strong{font-weight:700;color:var(--text);background:none}.markdown-body code{font-family:Consolas,monospace;background:var(--surface-muted);padding:2px 5px;border-radius:3px;font-size:.9em;color:var(--text)}.markdown-body pre{overflow:auto;background:var(--surface-muted);border:1px solid var(--border);padding:17px;border-radius:var(--radius-control);line-height:1.7;max-width:100%;font-size:var(--font-code)}.markdown-body pre code{background:transparent;padding:0;color:var(--text);font-size:inherit}.markdown-body img{max-width:100%;height:auto;display:block;margin:20px auto}.markdown-body blockquote{margin-left:0;padding:5px 18px;border-left:3px solid var(--border);background:var(--surface-muted);color:var(--text-secondary)}.markdown-body table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:var(--font-ui)}.markdown-body th,.markdown-body td{border:1px solid var(--border);padding:9px 12px;min-width:100px}.markdown-body th{background:var(--surface-muted)}.markdown-body a{color:var(--accent-hover);text-decoration:underline;text-underline-offset:3px}.markdown-body hr{border:0;border-top:1px solid var(--border);margin:25px 0}.pitfall{background:var(--warning-soft);border:1px solid var(--warning-border);border-radius:var(--radius-control);padding:18px 20px;margin-top:26px;color:var(--warning)}.pitfall h3{font-size:var(--font-section);display:flex;align-items:center;gap:7px}.pitfall p{font-size:var(--font-ui);line-height:1.9;margin-top:11px;color:var(--warning)}.follow-up{margin:23px 0;padding:0 0 0 16px;border-left:2px solid var(--accent-border)}.follow-up h3{font-size:var(--font-section);color:var(--text-secondary);display:flex;align-items:center;gap:8px}.follow-up p{font-size:var(--font-ui);line-height:1.9;color:var(--text-secondary);margin-top:9px}.source-note{display:flex;align-items:center;gap:9px;border-top:1px solid var(--border);padding-top:18px;margin-top:25px;color:var(--text-secondary);font-size:var(--font-caption);flex-wrap:wrap}.source-note span{line-height:1.9;flex:1}.source-note small{font-size:var(--font-caption);color:var(--text-secondary)}.source-note a{white-space:nowrap;color:var(--accent-hover);display:flex;gap:4px;align-items:center}.rating-card h2{display:flex;align-items:center;gap:8px;font-size:var(--font-section)}.rating-card>p{font-size:var(--font-small);color:var(--text-secondary);margin:13px 0 20px}.rating-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.rating-buttons button{display:flex;align-items:center;flex-direction:column;padding:17px 8px;border:1px solid var(--warning-border);border-radius:var(--radius-control);background:var(--warning-soft);color:var(--warning)}.rating-buttons button:nth-child(2){background:var(--surface-muted);color:var(--text-secondary);border-color:var(--border)}.rating-buttons button:nth-child(3){background:var(--accent-soft);color:var(--accent-hover);border-color:var(--accent-border)}.rating-buttons strong{font-size:var(--font-ui);font-weight:500;margin:10px 0 7px}.rating-buttons span{font-size:var(--font-caption)}.rating-buttons button:hover:not(:disabled){border-color:var(--border-strong);box-shadow:0 2px 8px var(--shadow-color)}.rated-message{font-size:var(--font-caption);color:var(--accent-hover);display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-top:20px}.rated-message .text-button{margin-left:auto}.toast{position:fixed;bottom:27px;left:50%;transform:translate(-50%);border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface);color:var(--text-secondary);box-shadow:0 8px 30px var(--shadow-overlay);padding:15px 20px;display:flex;align-items:center;gap:25px;font-size:12px;max-width:90vw;z-index:100}.toast>button{color:var(--text-secondary);padding:0}.about-dialog{border:1px solid var(--border);border-radius:var(--radius-card);max-width:570px;width:calc(100% - 35px);padding:35px;color:var(--text);box-shadow:0 15px 70px var(--shadow-overlay)}.about-dialog::backdrop{background:var(--backdrop);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.dialog-close{position:absolute;top:15px;right:15px}.about-dialog h2{font-size:25px;margin:15px 0}.about-dialog p{font-size:var(--font-ui);line-height:1.9;color:var(--text-secondary);margin-top:15px}.about-meta{display:flex;flex-direction:column;gap:10px;background:var(--surface-muted);border-radius:var(--radius-control);padding:15px 18px;font-size:var(--font-caption);color:var(--text-secondary);margin:18px 0;line-height:1.8}.about-meta code{font-size:var(--font-caption)}.dialog-actions{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:25px;flex-wrap:wrap}.dialog-actions>a:last-child{font-size:var(--font-caption);display:flex;gap:5px;align-items:center}.loading-page{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:20px}.loading-page h1{font-size:25px;letter-spacing:4px}.loading-page p{font-size:13px;color:var(--text-secondary)}.sidebar-backdrop{display:none}.spin{animation:spin 1.7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:1600px){.main-content{padding:35px 55px 0}.hero{min-height:330px;padding:38px 44px}.hero h1{font-size:41px}.hero p{font-size:var(--font-ui)}.hero-illustration{margin-right:45px}.dashboard-columns{grid-template-columns:minmax(0,1fr) 290px;gap:30px}.topic-card{padding:22px}.topic-card h3{font-size:var(--font-card-title)}.topic-card>p{font-size:var(--font-small)}.topic-card-meta{font-size:var(--font-caption)}.section-heading h2{font-size:var(--font-section)}.recommendation h3{font-size:var(--font-card-title)}.recommendation p{font-size:var(--font-small)}.daily-card{padding:24px}.main-shell .button{font-size:var(--font-ui)}}@media(max-width:1200px){.sidebar{width:215px;padding-left:15px;padding-right:15px}.main-shell{margin-left:215px;width:calc(100% - 215px)}.topbar{padding:0 28px}.main-content{padding:25px 28px 0}.dashboard-columns{grid-template-columns:minmax(0,1fr) 235px;gap:20px}.topics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding:29px}.hero-illustration{min-width:235px;transform:scale(.83);margin-right:-28px}.hero h1{font-size:32px}.hero-caption{gap:10px;font-size:var(--font-caption)}.stat-card{padding:15px 13px}.stat-card p{font-size:var(--font-caption)}.stats-grid{gap:12px}.study-layout{grid-template-columns:minmax(0,1fr) 235px;gap:18px}.recall-card,.answer-card,.rating-card{padding:20px}.subtle{display:none}.review-summary{gap:25px}.review-summary p{display:none}}@media(max-width:1000px){.hero-illustration{display:none}.hero-copy{flex-shrink:1}.hero{min-height:auto}.hero h1 br{display:none}.hero h1{font-size:29px}.hero-caption{font-size:var(--font-caption);gap:15px}.dashboard-columns{grid-template-columns:minmax(0,1fr) 220px;gap:18px}.topic-card{padding:15px 13px}.topic-card-meta{font-size:var(--font-caption)}.global-search{width:220px}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat-card{padding:15px 17px}.stat-card p{font-size:var(--font-caption)}.study-layout{grid-template-columns:1fr}.study-aside{display:grid;grid-template-columns:1fr 1fr}.study-source{grid-column:1/-1}.note-card textarea{min-height:130px}.question-row-title{flex-wrap:wrap;gap:5px}.question-row{gap:9px;margin:0 18px}.question-row-main h3{font-size:var(--font-card-title)}.row-open{display:none}.status-badge{font-size:var(--font-caption)}.question-row .bookmark-button{width:26px}.path-cards{grid-template-columns:1fr}.page-intro h1{font-size:25px}.topbar-right{gap:15px}}@media(max-width:800px){.sidebar{width:220px;transform:translate(-100%);transition:transform .2s}.sidebar.open{transform:translate(0)}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:var(--backdrop);z-index:19}.mobile-menu{display:inline-flex;margin-left:-6px}.main-shell{margin-left:0;width:100%}.topbar{height:66px;padding:0 24px}.main-content{padding:22px 24px 0}.dashboard-columns{grid-template-columns:minmax(0,1fr) 235px;gap:22px}.hero h1{font-size:31px}.hero-illustration{display:block;min-width:235px}.hero h1 br{display:block}.hero-caption{font-size:var(--font-caption);gap:10px}.hero p{font-size:var(--font-ui)}.hero{padding:28px}.hero-actions{gap:15px}.hero .text-button{font-size:var(--font-small)}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.stat-card p{font-size:var(--font-caption)}.stat-card{padding:12px}.stat-number{font-size:25px}.topics-grid{gap:12px}.topic-card>p{font-size:var(--font-small)}.path-cards{grid-template-columns:1fr 1fr}.path-card{padding:16px;gap:12px}.path-card .icon-badge{width:34px;height:34px}.breadcrumb{gap:8px}}@media(max-width:640px){.learning-mode-bar{gap:10px;margin-bottom:18px}.learning-mode-bar>p{font-size:var(--font-caption)}.mode-switch{width:100%}.mode-switch button{flex:1}.reading-mode .answer-card{padding:18px}.reading-mode .markdown-body{font-size:15px;line-height:1.9}.reading-mode .markdown-body pre{font-size:12px}.reading-navigation{gap:10px}.reading-navigation button{padding:15px}.topbar{padding:0 18px;height:61px}.breadcrumb{font-size:var(--font-caption);gap:5px}.breadcrumb>span{display:none}.breadcrumb>svg{display:none}.topbar-right{gap:10px}.global-search{width:160px;padding:8px}.global-search kbd{display:none}.global-search input{font-size:var(--font-caption)}.avatar{width:27px;height:27px}.main-content{padding:20px 18px 0}.welcome-line{font-size:var(--font-caption);margin-bottom:16px;flex-wrap:wrap;gap:8px}.hero{padding:25px 23px}.hero-illustration{display:none}.hero h1{font-size:30px;line-height:1.5;margin-top:13px;letter-spacing:2px}.hero p{font-size:var(--font-ui);line-height:1.9}.hero-actions{gap:20px}.hero .text-button{font-size:var(--font-small)}.hero-caption{gap:11px;font-size:var(--font-caption);flex-wrap:wrap}.stats-grid{grid-template-columns:repeat(2,1fr);gap:11px;margin-top:15px}.stat-card{padding:15px}.stat-card p{font-size:var(--font-caption)}.stat-number{font-size:28px}.dashboard-columns{grid-template-columns:1fr;gap:26px;margin-top:27px}.topics-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-card{padding:17px 14px}.topic-card-meta{font-size:var(--font-caption);margin-top:16px}.topic-card h3{font-size:var(--font-card-title)}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:13px}.daily-card{grid-row:span 2;padding:17px 14px}.daily-card h3{font-size:var(--font-small);line-height:1.8}.daily-card>p{font-size:var(--font-caption);line-height:1.8}.goal-ring{width:112px;height:112px}.daily-card .section-heading h2,.rhythm-card h2{font-size:var(--font-ui)}.rhythm-card{padding:16px 13px}.rhythm-card>p{font-size:var(--font-small);line-height:1.8}.activity-grid{gap:4px;margin-top:16px}.activity-legend>span:first-child{display:none}.activity-legend{justify-content:flex-end}.learning-tip{padding:16px 13px}.learning-tip h3,.learning-tip p{font-size:var(--font-small)}.learning-tip .eyebrow{font-size:var(--font-caption)}.tip-line{margin-top:13px}.continue-card{grid-column:1/-1}.recommended-section{margin-top:26px}.recommendation{padding:17px 0;gap:10px}.recommendation h3{font-size:var(--font-card-title)}.recommendation p{font-size:var(--font-caption)}.page-footer{font-size:var(--font-caption);flex-direction:column;align-items:center;margin-top:28px;gap:12px;padding:20px 0}.page-footer button{font-size:var(--font-caption)}.page-intro{padding:8px 0 24px}.page-intro h1{font-size:23px;line-height:1.65;margin:12px 0}.page-intro>p{font-size:var(--font-ui)}.library-top{padding:0 15px}.filter-tabs{gap:12px}.filter-tabs button{font-size:var(--font-small);padding:17px 0}.result-count{font-size:var(--font-caption);white-space:nowrap}.library-filters{padding:15px;gap:10px}.list-search{flex-basis:100%}.select-field{padding:7px 9px;flex:1}.select-field select{max-width:none;width:100%;font-size:var(--font-small)}.question-row{margin:0 15px;gap:9px;padding:17px 0}.row-index{font-size:var(--font-caption);width:16px}.question-row-title h3{font-size:var(--font-card-title)}.question-row-main p{gap:6px;font-size:var(--font-caption)}.question-row .status-badge{display:none}.essential-badge{font-size:var(--font-caption)}.pagination{padding:16px 14px;flex-wrap:wrap;justify-content:center;gap:13px}.pagination>span{font-size:var(--font-caption)}.review-summary{gap:23px;padding:20px;justify-content:center}.review-summary>div{gap:7px;flex-wrap:wrap;justify-content:center}.review-summary>div>svg{width:20px}.review-summary strong{font-size:25px}.review-summary span{font-size:var(--font-caption)}.path-notice{padding:18px;align-items:flex-start}.path-notice p{font-size:var(--font-ui)}.learning-paths{padding-top:26px}.path-phase{padding-left:25px;margin-left:18px}.phase-number{width:37px;height:37px;left:-19px;font-size:var(--font-caption)}.path-cards{grid-template-columns:1fr;gap:11px}.path-card{padding:18px}.phase-heading h2{font-size:18px}.study-breadcrumb{margin-bottom:24px}.study-heading h1{font-size:23px;margin:16px 0}.study-heading{padding-bottom:20px;margin-bottom:19px}.study-layout{gap:18px}.study-aside{grid-template-columns:1fr}.study-flow{display:none}.note-card textarea{min-height:150px}.study-tags{gap:8px;flex-wrap:wrap}.study-tags .muted-badge{font-size:var(--font-caption)}.study-heading-bottom>span{font-size:var(--font-caption)}.recall-card,.answer-card,.rating-card{padding:18px}.recall-card label{font-size:var(--font-small)}.section-heading h2{font-size:var(--font-section)}.reveal-card{padding:33px 16px}.markdown-body{font-size:15px;line-height:1.9}.markdown-body h3{font-size:17px}.markdown-body pre{font-size:12px;padding:12px}.key-points{padding:15px}.key-points ul{font-size:var(--font-ui)}.key-points h3{font-size:var(--font-section)}.key-points small{width:100%;margin-left:25px}.source-note{flex-wrap:wrap;gap:8px}.source-note>a{margin-left:25px}.source-note small,.pitfall,.follow-up{font-size:var(--font-caption)}.rating-buttons{gap:8px}.rating-buttons button{padding:14px 6px}.rating-buttons strong{font-size:var(--font-small)}.rating-buttons span{font-size:var(--font-caption);line-height:1.8}.rating-card>p{line-height:1.9;font-size:var(--font-small)}.rated-message{font-size:var(--font-caption);line-height:1.9}.about-dialog{padding:27px 23px}.about-dialog h2{font-size:23px}.about-dialog p{font-size:var(--font-ui)}.dialog-actions{flex-direction:column;align-items:flex-start}.toast{font-size:var(--font-caption);bottom:18px;width:max-content;max-width:90vw}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}