@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;450;500;550;600;650;700&family=Noto+Serif+SC:wght@500;600;650;700&display=swap');

:root{--bg:#f6f7f3;--paper:#fff;--sidebar:#f0f2eb;--ink:#273c33;--text:#47554d;--muted:#788279;--line:#e3e8de;--green:#28614c;--green-soft:#e8efe6;--lime:#dfe9be;--code:#f4f6f1;--warm:#f6f2e8;--shadow:0 5px 24px #233e2e03;color-scheme:light;font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-synthesis:none}
:root[data-theme=dark]{--bg:#17211d;--paper:#1e2a24;--sidebar:#19251f;--ink:#e2e9df;--text:#bfcabe;--muted:#95a692;--line:#334336;--green:#a5d1a9;--green-soft:#304733;--lime:#465939;--code:#17221c;--warm:#343124;--shadow:none;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px;line-height:1.8;-webkit-font-smoothing:antialiased}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,pre:focus-visible{outline:3px solid #84a77e;outline-offset:4px}main:focus{outline:none}svg{vertical-align:middle}.icon{width:20px;height:20px;flex:none}button{border:0;background:none}p,h1,h2,h3{margin:0}button,a,input,summary{touch-action:manipulation}.skip-link{position:fixed;top:-70px;left:16px;padding:10px 20px;background:var(--paper);z-index:20;border:1px solid var(--line);border-radius:8px}.skip-link:focus{top:12px}
.sidebar{position:fixed;left:0;top:0;bottom:0;width:228px;padding:36px 22px 22px;border-right:1px solid var(--line);background:var(--sidebar);display:flex;flex-direction:column;z-index:5}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-size:21px;font-weight:650;letter-spacing:1px;line-height:1.4}.brand-mark{width:43px;height:45px;background:#28614c;color:#f5f4df;border-radius:13px 13px 13px 3px;display:flex;align-items:center;justify-content:center;position:relative;font-family:'Noto Serif SC',serif;font-size:24px;font-weight:600;letter-spacing:0}.brand-mark>span{position:absolute;font-family:serif;font-size:32px;right:3px;bottom:-2px;color:#d9e8a4}.brand small{display:block;font-size:8px;font-weight:500;letter-spacing:1.7px;color:var(--muted);margin-top:7px;white-space:nowrap}.nav-caption{font-size:11px;color:var(--muted);margin:54px 14px 14px;letter-spacing:1px}.sidebar nav{display:grid;gap:8px}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:9px;font-size:13px;color:var(--text);transition:background .15s}.nav-item:hover{background:var(--green-soft)}.nav-item .icon{width:18px;height:18px;color:var(--muted)}.nav-item.active{color:var(--green);background:var(--green-soft);font-weight:600}.nav-item.active .icon{color:var(--green)}.nav-dot{margin-left:auto;display:none;width:5px;height:5px;background:var(--green);border-radius:50%}.active .nav-dot{display:block}.nav-count{font-size:10px;color:var(--muted);margin-left:auto;padding:0 6px;background:var(--bg);border-radius:4px}.sidebar-bottom{margin-top:auto}.quiet-note{margin:20px 14px 32px;color:var(--muted);font-family:'Noto Serif SC',serif;font-size:13px;line-height:2.1}.quiet-note>.icon{width:28px;height:28px;color:#7a956b;margin-bottom:12px}.sidebar-footer{display:flex;align-items:center;gap:7px;border-top:1px solid var(--line);padding:18px 2px 0;font-size:10px;color:var(--muted)}.status-dot,.green-dot{width:6px;height:6px;border-radius:50%;background:#69905b;display:inline-block;flex:none}.sidebar-footer .icon-btn{margin-left:auto}.icon-btn{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:var(--muted);padding:7px}.icon-btn:hover{background:var(--green-soft);color:var(--green)}.icon-btn .icon{width:18px;height:18px}.icon-btn.is-active{color:var(--green);background:var(--green-soft)}.icon-btn.is-active svg{fill:var(--green-soft)}
.workspace{margin-left:228px}.topbar{height:79px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 46px;color:var(--muted);font-size:11px;letter-spacing:.4px}.breadcrumb{font-size:12px}.topbar-right{display:flex;align-items:center;gap:18px}.timezone{font-size:10px}.avatar{width:28px;height:28px;border-radius:50%;background:var(--green-soft);border:1px solid var(--line);display:grid;place-items:center;color:var(--green);font-family:Georgia,serif;font-size:13px;margin-left:5px}main{max-width:1216px;margin:0 auto;padding:44px 46px 10px}.eyebrow{display:flex;align-items:center;gap:10px;font-size:9px;letter-spacing:1.8px;color:var(--muted);font-weight:500}.eyebrow-line{width:22px;height:1px;background:#829575}.edition{margin-left:auto;font-size:10px;letter-spacing:1px}.hero-heading{display:flex;align-items:center;justify-content:space-between;margin:21px 0 35px;gap:20px}.hero-heading h1{font-size:34px;color:var(--ink);font-family:'Noto Serif SC',Georgia,serif;font-weight:600;line-height:1.6;letter-spacing:1px}.hero-heading h1>span{color:#73856b}.hero-heading p{margin-top:9px;font-size:12px;color:var(--muted);letter-spacing:.3px}.date-tile{border:1px solid var(--line);background:var(--paper);border-radius:11px;min-width:66px;padding:7px 14px;text-align:center;line-height:1.4;transform:rotate(3deg);box-shadow:0 3px 0 var(--line);flex-shrink:0}.date-tile>span{display:block;font-size:9px;color:var(--muted)}.date-tile>strong{display:block;font-size:26px;color:var(--green);font-family:Georgia,serif;font-weight:400}.date-tile>small{font-size:8px;color:var(--muted)}.compact{margin-bottom:33px}.back-link{letter-spacing:.2px}.back-link:hover{color:var(--green)}
.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 248px;gap:24px;align-items:start}.reading-column{min-width:0}.lesson-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:25px 29px 20px;box-shadow:var(--shadow)}.card-topline{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.section-label{font-size:11px;letter-spacing:1px;color:var(--green);display:flex;align-items:center;gap:9px;font-weight:500}.card-actions{display:flex;gap:3px;margin-right:-8px}.lesson-meta{display:flex;align-items:center;gap:12px;font-size:10px;color:var(--muted);margin-bottom:12px}.lesson-meta>span{display:inline-flex;align-items:center;gap:4px}.lesson-meta .icon{width:12px;height:12px}.tag{display:inline-block;background:var(--green-soft);color:var(--green);font-size:10px;line-height:1.8;padding:2px 8px;border-radius:4px;letter-spacing:.3px}.lesson-card h2{font-size:23px;font-weight:600;letter-spacing:.3px;color:var(--ink);line-height:1.6}.lesson-intro{font-size:13px;margin-top:12px;line-height:1.95;color:var(--text)}.code-block{margin:23px 0 26px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--code)}.code-toolbar{height:39px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line);color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px}.code-toolbar>span{display:flex;align-items:center;gap:7px}.code-dot{width:5px;height:5px;border-radius:50%;background:#7c9b63}.copy-btn{display:flex;align-items:center;gap:5px;font-size:10px;padding:5px;border-radius:4px}.copy-btn:hover{color:var(--green);background:var(--green-soft)}.copy-btn .icon{width:12px;height:12px}pre{margin:0;padding:19px 20px 21px;overflow-x:auto;font-size:12px;line-height:1.95;tab-size:4;scrollbar-width:thin;color:var(--ink)}code{font-family:'SFMono-Regular',Consolas,'Liberation Mono',monospace;white-space:pre}.syntax-comment{color:#7d8b77}.syntax-keyword{color:#8b5891}.syntax-string{color:#537e4d}.syntax-number{color:#b37b3e}[data-theme=dark] .syntax-keyword{color:#c4a1d4}[data-theme=dark] .syntax-string{color:#b4cf91}[data-theme=dark] .syntax-number{color:#e1ba85}[data-theme=dark] .syntax-comment{color:#8fa68d}.facts h3{font-size:12px;color:var(--ink);display:flex;align-items:center;gap:8px;font-weight:600;margin-bottom:12px}.small-square{height:5px;width:5px;background:#81946b;transform:rotate(45deg)}.facts ul{margin:0;padding:0;list-style:none;display:grid;gap:10px}.facts li{font-size:12px;line-height:1.95;position:relative;padding-left:14px}.facts li:before{content:'';position:absolute;left:1px;top:10px;width:3px;height:3px;background:#a5b09a;border-radius:50%}.pitfall{background:var(--warm);border-radius:7px;margin-top:23px;padding:13px 15px;display:flex;gap:12px}.pitfall-label{font-size:10px;white-space:nowrap;flex-shrink:0;color:#92794d;line-height:2}.pitfall p{font-size:11px;line-height:1.9;color:var(--text)}.thought{border-bottom:1px solid var(--line);margin-top:9px}.thought summary{display:flex;gap:7px;align-items:center;font-size:11px;padding:17px 0;cursor:pointer;color:var(--green);list-style:none}.thought summary::-webkit-details-marker{display:none}.thought .icon{width:15px;height:15px}.thought summary .icon:last-child{margin-left:auto;width:12px;height:12px;transition:transform .2s}.thought[open] summary .icon:last-child{transform:rotate(90deg)}.thought p{font-size:12px;padding:0 8px 17px 22px;color:var(--text);line-height:2}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:17px}.read-button{display:flex;align-items:center;gap:5px;font-size:11px;border:1px solid var(--line);border-radius:6px;padding:7px 12px;color:var(--text)}.read-button .icon{width:13px;height:13px;color:#7d9473}.read-button:hover,.read-button.selected{background:var(--green-soft);border-color:var(--green-soft);color:var(--green)}.review-button{display:flex;align-items:center;gap:5px;font-size:10px;color:var(--muted);padding:8px 0}.review-button .icon{width:12px;height:12px}.review-button:hover,.review-button.selected{color:var(--green)}
.reading-rail{display:grid;gap:19px}.rail-card{border:1px solid var(--line);border-radius:13px;padding:23px 21px;background:var(--paper)}.growth{background:var(--green-soft);border-color:var(--green-soft);position:relative;overflow:hidden}.growth:after{content:'';position:absolute;right:-22px;top:16px;width:90px;height:90px;border:1px solid #879d6133;border-radius:50%;pointer-events:none}.growth h3{font-family:'Noto Serif SC',serif;font-size:18px;color:var(--ink);font-weight:600;margin-top:15px;position:relative;z-index:1}.growth>p{font-size:10px;margin-top:6px;color:var(--muted)}.growth-stats{display:flex;align-items:center;margin:22px 0 18px;gap:27px}.growth-stats>div{display:flex;flex-direction:column}.growth-stats strong{font-family:Georgia,serif;font-size:31px;font-weight:400;line-height:1.25;color:var(--green)}.growth-stats span:not(.stat-divider){font-size:9px;color:var(--muted);margin-top:5px}.stat-divider{width:1px;height:32px;background:#b9c6ab77}.progress-track{height:4px;border-radius:5px;background:#8b9c7130;overflow:hidden}.progress-track>span{display:block;height:100%;background:#70915a;border-radius:5px;transition:width .3s}.progress-caption{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);margin-top:7px}.next-notes .section-label{margin-bottom:11px;color:var(--muted);font-size:10px}.next-note{display:flex;align-items:center;gap:11px;padding:15px 0;border-bottom:1px solid var(--line);font-size:11px;color:var(--ink)}.next-note:hover{color:var(--green)}.next-number{font-family:Georgia,serif;font-size:12px;color:#92a17d}.next-note>span:nth-child(2){flex:1;min-width:0}.next-note small{display:block;font-size:9px;color:var(--muted);margin-top:4px}.next-note>.icon{height:12px;width:12px;color:#99a08f}.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:10px;margin-top:17px}.text-link .icon{width:13px;height:13px}.rail-note{padding:8px 16px;display:flex;gap:11px;color:#8c9a7b;font-size:11px;line-height:2}.rail-note .icon{width:22px;height:22px;margin-top:4px}.rail-note p{color:var(--muted)}
.practice-card{margin-top:23px;background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:23px 28px 17px;box-shadow:var(--shadow)}.practice-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.practice-top .section-label{font-size:10px}.practice-top .icon{width:16px;height:16px}.hot-label{font-size:8px;letter-spacing:1px;color:#9b824b;border:1px solid #dfd3b2;padding:2px 6px;border-radius:4px}.problem-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:21px 0}.problem-meta{display:flex;align-items:center;gap:8px;font-size:9px;color:var(--muted)}.difficulty{font-size:9px;border-radius:4px;padding:0 5px}.easy{background:var(--green-soft);color:var(--green)}.medium{background:var(--warm);color:#96743c}.problem-heading h2{font-size:19px;color:var(--ink);font-weight:600;margin-top:5px}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;background:#28614c;color:#fff;border-radius:7px;font-size:11px;white-space:nowrap;border:1px solid #28614c;transition:background .15s}.primary-button .icon{width:13px;height:13px}.primary-button:hover{background:#194d39}.hint-area{border-top:1px solid var(--line);padding-top:17px}.hint-heading{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted)}.hint-heading>span:first-child{display:flex;align-items:center;gap:6px}.hint-heading .icon{width:14px;height:14px}.hint-heading>span:last-child{font-family:ui-monospace,monospace;font-size:9px}.hint-button{font-size:11px;margin-top:12px;padding:9px 12px;background:var(--bg);border:1px dashed #c7d0bd;border-radius:6px;display:flex;align-items:center;justify-content:space-between;width:100%;color:var(--green);min-height:40px}.hint-button .icon{width:12px;height:12px}.hint-button:hover:not(:disabled){background:var(--green-soft)}.hint-button:disabled{color:var(--muted);border-style:solid;border-color:var(--line)}.hint-item{display:flex;gap:10px;margin-top:13px;padding:12px;background:var(--green-soft);border-radius:7px;font-size:11px}.hint-item>span{font-family:Georgia,serif;color:#85976b;font-size:13px;line-height:1.8}.hint-item>p{line-height:1.9}.practice-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:15px}.practice-bottom>span{font-size:9px;color:var(--muted)}.problem-done{display:flex;align-items:center;gap:4px;color:var(--muted);font-size:10px;padding:6px 0}.problem-done .icon{width:13px;height:13px}.problem-done.selected{color:var(--green)}.lesson-pagination{display:flex;justify-content:space-between;gap:12px;margin:22px 0;font-size:10px;color:var(--green)}.lesson-pagination a{display:flex;gap:10px;align-items:center;padding:8px 0}.lesson-pagination a span{color:var(--muted);font-size:10px}.lesson-pagination a:hover span{color:var(--green)}.data-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:28px 0 12px;border-top:1px solid var(--line);padding-top:18px;font-size:9px;color:var(--muted)}.data-footer>span{display:flex;align-items:center;gap:6px}.data-footer .icon{width:12px;height:12px}.data-footer>div{display:flex;gap:13px;flex-shrink:0}.data-footer button{font-size:9px;color:var(--green);padding:5px 0}.data-footer button:hover{text-decoration:underline}.page-footer{max-width:1216px;margin:0 auto;padding:12px 46px 29px;display:flex;justify-content:space-between;gap:20px;font-size:9px;color:var(--muted)}
.library-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:30px}.search-box{position:relative;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:9px;background:var(--paper);padding:10px 13px;width:380px;max-width:100%}.search-box>.icon{width:16px;height:16px;color:var(--muted)}.search-box input{background:transparent;border:none;color:var(--ink);font-size:12px;width:100%;min-width:0;outline:none!important;line-height:1.8}.search-box:focus-within{border-color:#8b9f7b;box-shadow:0 0 0 2px #94b28b22}.search-box input::placeholder{color:var(--muted)}.search-box kbd{font-size:10px;border:1px solid var(--line);border-radius:3px;color:var(--muted);padding:0 5px}.library-toolbar>span{font-size:10px;color:var(--muted);white-space:nowrap}.filter-row{display:flex;gap:7px;flex-wrap:wrap;margin:19px 0 24px}.filter-button{font-size:11px;color:var(--muted);border-radius:5px;padding:6px 13px;border:1px solid transparent}.filter-button:hover{color:var(--green)}.filter-button.active{background:var(--green-soft);color:var(--green);border-color:var(--line)}.library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.library-card{background:var(--paper);border:1px solid var(--line);border-radius:13px;overflow:hidden;transition:transform .15s,border-color .15s}.library-card:hover{border-color:#a9ba9a;transform:translateY(-2px)}.library-card-top{display:flex;justify-content:space-between;align-items:center;padding:17px 18px 10px}.lesson-number{font-size:9px;letter-spacing:1.3px;color:var(--muted);font-family:ui-monospace,monospace}.library-card-top .icon-btn{width:30px;height:30px;margin-right:-6px}.library-card-link{display:block;padding:0 20px 17px;height:calc(100% - 57px)}.library-card h2{font-size:18px;color:var(--ink);font-weight:550;margin:12px 0 9px}.library-card p{font-size:11px;line-height:1.95;color:var(--muted);min-height:65px}.library-tags{display:flex;gap:7px;margin:19px 0 18px;flex-wrap:wrap}.library-tags>span{font-family:ui-monospace,monospace;font-size:9px;color:var(--muted);padding:0 6px;border:1px solid var(--line);border-radius:4px}.library-card-bottom{border-top:1px solid var(--line);padding-top:12px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:9px}.library-card-bottom>span{display:flex;align-items:center;gap:5px}.library-card-bottom .icon{width:13px;height:13px}.library-card-bottom>.icon{color:var(--green)}.empty-state{grid-column:1/-1;text-align:center;border:1px dashed var(--line);border-radius:14px;padding:65px 25px;background:var(--paper)}.empty-state>.icon{color:#8da379;width:32px;height:32px;margin-bottom:17px}.empty-state h2,.empty-state h1{font-size:21px;color:var(--ink);font-family:'Noto Serif SC',serif;font-weight:500}.empty-state p{font-size:12px;margin-top:12px;color:var(--muted)}.empty-state .primary-button{margin-top:20px}.empty-state .text-link{font-size:12px}
#toast{position:fixed;bottom:26px;left:calc(50% + 114px);transform:translate(-50%,12px);background:var(--ink);color:var(--bg);font-size:12px;line-height:1.8;padding:10px 18px;border-radius:8px;box-shadow:0 4px 25px #14291d1c;max-width:calc(100vw - 40px);width:max-content;z-index:20;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}#toast.visible{opacity:1;transform:translate(-50%,0)}
@media(min-width:1500px){.sidebar{width:248px;padding-left:30px;padding-right:30px}.workspace{margin-left:248px}main{padding-top:55px}.hero-heading h1{font-size:38px}.reading-layout{grid-template-columns:minmax(0,1fr) 260px;gap:28px}.lesson-card{padding:28px 34px 23px}.lesson-intro{font-size:14px}.facts li{font-size:13px}pre{font-size:13px}.practice-card{padding:26px 33px 19px}}
@media(max-width:1190px){.sidebar{width:205px;padding-left:17px;padding-right:17px}.workspace{margin-left:205px}.brand{font-size:19px;gap:10px}.brand small{font-size:7px}.brand-mark{width:39px;height:42px}.topbar{padding:0 30px}main{padding:35px 30px 10px}.hero-heading h1{font-size:29px}.reading-layout{grid-template-columns:minmax(0,1fr) 210px;gap:18px}.rail-card{padding:20px 17px}.growth h3{font-size:16px}.growth-stats{gap:21px}.lesson-card{padding:23px 23px 19px}.lesson-card h2{font-size:21px}.practice-card{padding:21px 23px 16px}.problem-heading{align-items:flex-start;flex-direction:column;gap:15px}.primary-button{align-self:flex-start}.library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-footer{padding-left:30px;padding-right:30px}}
@media(max-width:980px){.sidebar{width:185px;padding-left:13px;padding-right:13px}.workspace{margin-left:185px}.brand{font-size:17px;gap:9px}.brand-mark{width:35px;height:39px;font-size:23px}.brand small{font-size:6px;letter-spacing:1.2px}.nav-item{font-size:12px;padding-left:12px;gap:10px}.nav-caption{font-size:10px;margin-left:12px}.topbar{height:68px;padding:0 27px}.reading-layout{grid-template-columns:minmax(0,1fr)}.reading-rail{grid-template-columns:1fr 1fr;gap:18px;margin-top:3px}.rail-note{display:none}.hero-heading h1{font-size:28px}.hero-heading p{font-size:11px}.problem-heading{flex-direction:row;align-items:center}.growth-stats{margin:15px 0}.next-note{padding:11px 0}.next-notes .text-link{margin-top:10px}.data-footer{margin-top:23px}.page-footer{font-size:8px}.edition{font-size:9px}.library-grid{gap:14px}}
@media(max-width:700px){body{font-size:14px}.sidebar{position:static;width:auto;height:75px;padding:16px 21px;background:var(--bg);border-right:0;border-bottom:1px solid var(--line);flex-direction:row;align-items:center}.brand{font-size:20px;gap:11px}.brand-mark{width:37px;height:40px}.brand small{font-size:6px;letter-spacing:1.6px;margin-top:5px}.nav-caption,.quiet-note{display:none}.sidebar nav{position:fixed;bottom:0;left:0;right:0;height:calc(65px + env(safe-area-inset-bottom));padding:5px 7px calc(5px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(4,1fr);gap:4px;border-top:1px solid var(--line);background:var(--paper);z-index:10}.nav-item{flex-direction:column;gap:2px;font-size:10px;padding:5px 3px;justify-content:center;border-radius:7px;line-height:1.8;min-height:48px}.nav-item>.icon,.nav-item>[data-icon]>.icon{width:19px;height:19px}.nav-dot,.nav-count,.active .nav-dot{display:none}.sidebar-bottom{margin:0 0 0 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17px;border-radius:13px}.card-topline{margin-bottom:18px}.section-label{font-size:10px}.card-actions{margin-right:-7px}.lesson-meta{font-size:9px;margin-bottom:12px}.tag{font-size:9px}.lesson-card h2{font-size:21px;line-height:1.7;letter-spacing:0}.lesson-intro{font-size:13px;line-height:1.95;margin-top:10px}.code-block{margin:21px -1px 24px}.code-toolbar{height:38px;padding:0 12px}pre{padding:17px 13px 19px;font-size:11px;line-height:2}.copy-btn{min-height:32px;padding:6px}.facts h3{font-size:12px;margin-bottom:12px}.facts li{font-size:12px;line-height:2}.facts ul{gap:12px}.pitfall{margin-top:22px;gap:9px;padding:13px 11px}.pitfall-label{font-size:9px;line-height:2.3}.pitfall p{font-size:11px}.thought summary{font-size:11px;min-height:53px}.thought p{font-size:12px}.lesson-bottom{gap:8px;padding-top:16px}.read-button{font-size:10px;padding:9px 10px;min-height:38px}.review-button{font-size:9px;padding:9px 0;min-height:38px}.practice-card{margin-top:18px;padding:20px 20px 15px;border-radius:13px}.practice-top .section-label{font-size:9px;letter-spacing:.4px}.hot-label{font-size:7px}.problem-heading{margin:20px 0;gap:14px;flex-wrap:wrap}.problem-heading h2{font-size:19px}.problem-meta{font-size:9px}.primary-button{font-size:11px;min-height:42px;padding:9px 13px}.hint-button{min-height:44px;font-size:11px;padding:10px 12px}.hint-heading{font-size:10px}.hint-item{font-size:12px;padding:12px}.practice-bottom{margin-top:13px;align-items:center}.practice-bottom>span{font-size:9px;max-width:170px;line-height:1.9}.problem-done{font-size:10px;min-height:40px;flex-shrink:0}.reading-rail{grid-template-columns:1fr;margin-top:1px}.growth{padding:20px 23px}.growth-stats{position:absolute;right:25px;top:16px;gap:22px;margin:0}.growth h3{font-size:17px;margin-top:12px}.growth>p{font-size:9px}.growth-stats strong{font-size:27px}.growth-stats span:not(.stat-divider){font-size:8px}.growth .progress-track{margin-top:23px}.growth:after{display:none}.next-notes{display:none}.lesson-pagination{margin:14px 0;font-size:10px;gap:8px}.lesson-pagination a{gap:5px}.lesson-pagination a span{font-size:9px;max-width:95px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.data-footer{flex-direction:column;align-items:flex-start;gap:7px;font-size:9px;margin-top:22px;padding-top:15px;line-height:1.9}.data-footer>div{align-self:flex-end;gap:20px}.data-footer button{font-size:10px;min-height:36px}.page-footer{padding:8px 20px 22px;font-size:8px;gap:10px}.page-footer>span:last-child{font-size:7px}.library-toolbar{margin-top:22px;gap:12px}.search-box{width:100%;padding:10px 12px}.search-box input{font-size:12px;min-height:23px}.search-box kbd{display:none}.library-toolbar>span{font-size:9px}.filter-row{gap:4px;margin:17px 0 19px}.filter-button{font-size:10px;padding:7px 10px;min-height:36px}.library-grid{grid-template-columns:1fr;gap:14px}.library-card-top{padding:15px 20px 5px}.library-card h2{font-size:19px;margin:10px 0}.library-card p{font-size:12px;min-height:0}.library-tags{margin:14px 0}.library-card-link{padding:0 22px 17px}.library-card-bottom{font-size:10px}.library-card-top .icon-btn{width:36px;height:36px;margin-top:-3px}.library-card:hover{transform:none}.empty-state{padding:43px 20px}.empty-state h2{font-size:19px}.empty-state p{font-size:11px}#toast{left:50%;bottom:calc(85px + env(safe-area-inset-bottom));font-size:11px;max-width:calc(100vw - 30px);white-space:normal}.icon-btn{min-width:34px;min-height:34px}}
@media(max-width:360px){main{padding-left:14px;padding-right:14px}.topbar{padding-left:16px;padding-right:16px}.hero-heading h1{font-size:24px}.hero-heading p{font-size:9px}.lesson-card,.practice-card{padding-left:16px;padding-right:16px}.growth-stats{right:15px;gap:15px}.growth{padding-left:17px;padding-right:17px}.growth h3{font-size:15px}.growth>p{max-width:120px}.review-button{font-size:8px}.filter-button{padding:7px 8px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}