/* Calm slate palette. Every surface and text color follows these theme tokens. */
:root{--bg:#edf0f4;--paper:#f6f8fb;--text:#2c3948;--text-soft:#485c70;--muted:#687c90;--line:#d2dbe5;--accent:#617f9f;--accent-pale:#e1eaf4;--green:#537f7d;--green-pale:#e3efed;--blue:#6685a7;--sidebar:#e5eaf1;--surface:#e8edf4;--selected:#e0e9f2;--warning-bg:#ece9e2;--warning-text:#807252;--primary-hover:#40566c;--on-accent:#f8fbff;--danger:#956b70;--toast-bg:#3c5267;--shadow:#25354a0a;--nav-glass:#edf0f4f5;--diagram-muted:#a5b5c5;--diagram-line:#8ba1b5;--diagram-plane:#d9e3ed;--diagram-accent:#7191b0;--serif:Georgia,'Times New Roman',serif;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color-scheme:light}
:root[data-theme="dark"]{--bg:#171d25;--paper:#202934;--text:#d7e1ec;--text-soft:#bdcbd9;--muted:#97aabd;--line:#344352;--accent:#9bb4cf;--accent-pale:#2b3a4c;--green:#92bdb7;--green-pale:#233c3d;--blue:#9cb7d6;--sidebar:#1b232d;--surface:#26323f;--selected:#2a3a4b;--warning-bg:#35332f;--warning-text:#c2b596;--primary-hover:#b8c9dc;--on-accent:#182431;--danger:#c3979b;--toast-bg:#38536c;--shadow:#00000018;--nav-glass:#171d25f5;--diagram-muted:#465b70;--diagram-line:#6a8299;--diagram-plane:#263b4e;--diagram-accent:#a0bad4;color-scheme:dark}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--danger);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.2}h1{font:normal clamp(38px,4.3vw,65px)/1.05 var(--serif);letter-spacing:-2px}h2{font:normal 31px/1.25 var(--serif);letter-spacing:-.6px}h3{font-size:17px;font-weight:600;letter-spacing:-.25px}.muted{color:var(--muted)}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:600;text-transform:uppercase}.skip{position:fixed;top:-100px;left:10px;background:var(--paper);padding:12px;z-index:99}.skip:focus{top:10px}
.sidebar{width:252px;position:fixed;inset:0 auto 0 0;background:var(--sidebar);border-right:1px solid var(--line);padding:34px 24px 22px;display:flex;flex-direction:column;overflow:auto;z-index:20}.brand{display:flex;align-items:center;gap:12px;font-size:29px;font-weight:650;letter-spacing:-1.4px;line-height:1}.brand-icon{font:italic 26px var(--serif);background:var(--accent);color:var(--on-accent);width:41px;height:41px;display:grid;place-items:center;border-radius:12px}.brand-sub{display:block;font-size:10px;font-weight:400;letter-spacing:.3px;color:var(--muted);margin-top:7px}.course-caption{font-size:9px;letter-spacing:1.4px;color:var(--muted);margin:43px 0 13px;font-weight:650}nav a{display:flex;align-items:center}#navigation{display:grid;gap:4px}#navigation a{padding:10px 12px;border-radius:7px;font-size:13px;color:var(--muted);gap:13px}#navigation a>span{font-size:19px;width:18px;text-align:center;line-height:1}#navigation small{margin-left:auto;color:var(--muted);font-size:10px}#navigation a.active{background:var(--paper);color:var(--text-soft);box-shadow:0 2px 5px var(--shadow)}#navigation a.active>span{color:var(--accent)}#navigation a:hover,.week-nav a:hover{background:var(--surface)}.sidebar-divider{height:1px;flex-shrink:0;background:var(--line);margin-top:25px}.sidebar-divider+.course-caption{margin-top:24px}.week-nav{display:grid;gap:1px}.week-nav a{font-size:11px;color:var(--muted);gap:12px;padding:8px 6px;border-radius:6px}.week-num{font:10px ui-monospace,monospace;color:var(--muted)}.week-nav a.active{color:var(--accent);background:var(--selected)}.week-nav .done-dot{margin-left:auto;color:var(--green);font-size:11px}.sidebar-bottom{margin-top:auto;padding-top:34px}.progress-label{display:flex;justify-content:space-between;font-size:11px;margin-bottom:10px}.progress-label strong{font-weight:500;color:var(--green)}.progress-track{height:4px;border-radius:3px;background:var(--line);overflow:hidden}.progress-track>div{height:100%;background:var(--green);width:0;transition:width .25s}.sidebar-bottom p{font-size:10px;color:var(--muted);margin:8px 0 24px}.storage-link{font-size:9px;color:var(--muted);display:flex;align-items:center;gap:6px}.storage-link>span:last-child{margin-left:auto}.status-dot{width:5px;height:5px;border-radius:50%;background:var(--green);display:inline-block;flex-shrink:0}
.workspace{margin-left:252px}.topbar{height:79px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;padding:0 46px}.breadcrumb{font-size:10px;color:var(--muted)}.breadcrumb span{margin:0 13px;color:var(--line)}.breadcrumb b{font-weight:500;color:var(--text-soft)}.top-tools{display:flex;align-items:center;gap:25px}.offline-label{font-size:9px;color:var(--muted);white-space:nowrap}.offline-label i{margin-right:5px}.icon-button{border:0;background:none;font-size:24px;color:var(--muted);padding:4px 6px}.mobile-brand,.mobile-nav{display:none}main{max-width:1420px;margin:0 auto;padding:41px 46px 68px;min-height:calc(100vh - 150px)}.page-topline{display:flex;justify-content:space-between;align-items:center;margin-bottom:29px;color:var(--muted)}.page-topline .semester{font-size:10px;display:flex;align-items:center;gap:7px}.semester:before{content:'';width:18px;height:1px;background:var(--muted)}.hero{display:grid;grid-template-columns:1.3fr 1fr;min-height:302px;gap:18px;position:relative}.hero h1{margin:5px 0 21px}.hero h1 em{color:var(--accent);font-weight:normal}.hero-description{font-size:12px;color:var(--muted);line-height:1.85;max-width:330px;margin-bottom:25px}.button{display:inline-flex;align-items:center;justify-content:center;gap:21px;padding:12px 18px;border:1px solid var(--line);border-radius:6px;background:var(--paper);font-size:11px;font-weight:500;color:var(--text-soft);min-height:43px;transition:background .15s,transform .15s}.button:hover{background:var(--surface);transform:translateY(-1px)}.button.primary{background:var(--text);color:var(--paper);border-color:var(--text)}.button.primary:hover{background:var(--primary-hover)}.button.accent{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.button.ghost{background:transparent}.button.small{padding:7px 12px;min-height:34px;gap:10px}.button .arrow{font-size:17px;line-height:1}.hero-actions{display:flex;align-items:center;gap:18px}.text-link{font-size:11px;color:var(--muted);display:inline-flex;align-items:center;gap:9px}.text-link:hover{color:var(--accent)}.hero-art{position:relative;align-self:center;min-width:0}.hero-art svg{width:100%;height:auto;max-height:300px}.art-label{font:italic 12px var(--serif);color:var(--muted);text-align:center;margin-top:-15px}.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:33px 0 35px;padding:19px 0}.stat{padding:0 21px;border-right:1px solid var(--line)}.stat:first-child{padding-left:0}.stat:last-child{border:0}.stat>div{display:flex;align-items:baseline;gap:7px}.stat strong{font:normal 30px/1.1 var(--serif)}.stat span{font-size:10px;color:var(--muted)}.stat p{font-size:10px;color:var(--muted);margin:5px 0 0}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:18px}.section-heading h2{font-size:25px;margin:0}.section-heading .muted{font-size:10px}.week-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.week-card{border:1px solid var(--line);background:var(--paper);padding:20px;border-radius:9px;display:flex;flex-direction:column;min-height:218px;position:relative;transition:transform .2s,border .2s,box-shadow .2s}.week-card:hover{transform:translateY(-3px);border-color:var(--line);box-shadow:0 8px 25px var(--shadow)}.week-card.recommended{background:var(--selected);border-color:var(--line)}.week-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:23px}.week-card-top .eyebrow{font-size:8px;letter-spacing:1.1px;color:var(--muted)}.topic-icon{width:32px;height:32px;display:grid;place-items:center;border-radius:8px;color:var(--green);background:var(--selected);font:24px var(--serif)}.week-card:nth-child(5) .topic-icon,.week-card:nth-child(6) .topic-icon{color:var(--warning-text);background:var(--warning-bg)}.week-card h3{font-size:15px;margin:0 0 9px;line-height:1.35;max-width:100%}.week-card p{font-size:10px;color:var(--muted);line-height:1.65;margin:0 0 20px}.week-card-bottom{display:flex;align-items:center;gap:12px;margin-top:auto;font-size:9px;color:var(--muted)}.week-card-bottom .progress-track{flex:1;height:3px;background:var(--surface)}.week-card-bottom .go{font-size:18px;color:var(--muted)}.route-note{font-size:10px;color:var(--muted);line-height:1.7;margin:18px 0 30px}.study-tip{border:1px solid var(--line);background:var(--sidebar);border-radius:9px;padding:25px;display:flex;align-items:center;gap:23px;margin-top:24px}.study-tip .tip-icon{font:32px var(--serif);color:var(--muted);flex-shrink:0}.study-tip h3{font:normal 21px var(--serif);margin-bottom:6px}.study-tip p{font-size:11px;line-height:1.7;color:var(--muted);margin:0;max-width:600px}.study-tip .text-link{margin-left:auto;white-space:nowrap}footer{padding:20px 46px;border-top:1px solid var(--line);font-size:9px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}
.page-title{margin-bottom:28px}.page-title .eyebrow{color:var(--muted);display:block;margin-bottom:16px}.page-title h1{font-size:46px;margin-bottom:15px}.page-title>p{font-size:13px;color:var(--muted);max-width:630px}.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 18px}.search{position:relative;flex:1;min-width:180px}.search span{position:absolute;left:14px;top:9px;color:var(--muted);font-size:20px}.search input{width:100%;padding:12px 14px 12px 40px;background:var(--paper);border:1px solid var(--line);border-radius:6px;font-size:12px;color:var(--text)}select{padding:10px 29px 10px 12px;background:var(--paper);border:1px solid var(--line);border-radius:6px;font-size:11px;color:var(--muted);max-width:100%}.filter-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:24px}.chip{border:1px solid var(--line);background:transparent;border-radius:30px;padding:6px 13px;font-size:10px;color:var(--muted)}.chip.active{border-color:var(--line);background:var(--selected);color:var(--text-soft)}.question-list{border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--paper)}.question-row{display:flex;align-items:center;gap:18px;padding:20px;border-bottom:1px solid var(--line);transition:background .15s}.question-row:last-child{border:0}.question-row:hover{background:var(--selected)}.question-row .q-index{font:12px ui-monospace,monospace;color:var(--muted);min-width:23px}.question-row .q-body{flex:1;min-width:0}.question-row h3{font-size:14px;line-height:1.5;margin:0 0 6px}.question-row p{font-size:10px;color:var(--muted);margin:0}.question-row .go{color:var(--muted)}.status-pill{font-size:9px;padding:4px 9px;border-radius:20px;background:var(--surface);color:var(--muted);white-space:nowrap}.status-pill.known{color:var(--green);background:var(--muted)}.status-pill.repeat{color:var(--warning-text);background:var(--warning-bg)}.empty-state{padding:50px;text-align:center;border:1px dashed var(--line);border-radius:10px;color:var(--muted)}.empty-state h3{font:25px var(--serif);color:var(--text-soft)}.back-link{font-size:11px;color:var(--muted);display:inline-flex;gap:12px;margin-bottom:30px}.question-header{display:flex;align-items:flex-start;gap:16px}.question-header h1{font-size:clamp(30px,3.5vw,48px);line-height:1.17;letter-spacing:-1.2px;margin:14px 0 25px;max-width:840px}.question-header>div{flex:1}.save-button{border:1px solid var(--line);width:39px;height:39px;display:grid;place-items:center;border-radius:50%;font-size:20px;background:none;color:var(--muted);flex-shrink:0;margin-top:12px}.save-button.selected{color:var(--accent);background:var(--accent-pale);border-color:var(--line)}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 225px;gap:25px}.article-body{min-width:0}.answer-box{background:var(--selected);border:1px solid var(--line);padding:27px 29px;border-radius:9px;margin-bottom:23px}.answer-box .eyebrow{color:var(--muted);margin-bottom:14px;display:flex;gap:10px;align-items:center}.answer-box p{font:20px/1.65 var(--serif);margin:0;color:var(--text-soft)}.article-section{padding:20px 0;border-bottom:1px solid var(--line)}.article-section h2{font-size:24px;margin-bottom:14px}.article-section p{font-size:14px;line-height:1.95;color:var(--text-soft);margin-bottom:0;white-space:pre-line}.formula{white-space:pre-line;font:17px/1.9 var(--serif);background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--muted);padding:20px 23px;border-radius:5px;overflow-wrap:anywhere;margin:20px 0;color:var(--text-soft)}.example-box{background:var(--paper);border:1px solid var(--line);padding:20px;border-radius:7px}.example-box h3{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1px}.example-box p{font-size:13px;line-height:1.9;margin:0;color:var(--text-soft)}.trap{background:var(--warning-bg);border:1px solid var(--line);border-radius:7px;padding:19px 20px;margin:22px 0}.trap h3{font-size:11px;color:var(--warning-text);letter-spacing:.3px;margin-bottom:9px}.trap p{font-size:12px;color:var(--warning-text);line-height:1.8;margin:0}details{border:1px solid var(--line);border-radius:7px;padding:18px 20px;margin:18px 0;background:var(--paper)}summary{cursor:pointer;font-size:13px;color:var(--text-soft);list-style-position:outside;margin-left:10px}details p{font-size:13px;line-height:1.9;color:var(--muted);margin:15px 0 0}.article-sidebar{align-self:start;position:sticky;top:20px}.side-panel{border:1px solid var(--line);border-radius:8px;padding:19px;background:var(--surface);margin-bottom:16px}.side-panel h3{font-size:11px;color:var(--muted);margin-bottom:15px}.check-item{display:flex;gap:9px;align-items:flex-start;font-size:11px;line-height:1.7;color:var(--muted);margin:12px 0}.check-item:before{content:'○';color:var(--muted)}.source-link{font-size:10px;color:var(--muted);display:block;line-height:1.6;margin:10px 0}.source-link:hover{color:var(--accent)}.source-link:before{content:'↗ ';color:var(--muted)}.article-actions{display:flex;gap:10px;flex-wrap:wrap;margin:25px 0}.article-actions .button{flex:1;gap:10px}.notes-label{font-size:11px;color:var(--muted);display:block;margin-bottom:10px}textarea{width:100%;min-height:105px;padding:16px;border:1px solid var(--line);background:var(--paper);border-radius:7px;resize:vertical;font-size:12px;line-height:1.8;color:var(--text-soft)}.article-next{display:flex;justify-content:space-between;gap:15px;margin-top:25px}.article-next .text-link{max-width:48%;font-size:10px;line-height:1.5}.notice{font-size:11px;color:var(--muted);border:1px solid var(--line);background:var(--selected);border-radius:6px;padding:14px 18px;line-height:1.8;margin-bottom:22px}.notice.warm{background:var(--warning-bg);border-color:var(--line);color:var(--warning-text)}
.practice-layout{display:grid;grid-template-columns:1.35fr 1fr;gap:32px}.setup-card{padding:29px;border:1px solid var(--line);background:var(--paper);border-radius:10px}.setup-card h2{font-size:27px}.field{display:block;margin-bottom:23px}.field>span{display:block;font-size:11px;color:var(--muted);margin-bottom:9px}.field select{width:100%;padding:13px}.setup-card .button{width:100%;margin-top:8px}.practice-guide{padding:28px 10px}.guide-step{display:flex;gap:17px;margin-bottom:25px}.guide-step>span{font:italic 23px var(--serif);color:var(--muted)}.guide-step h3{font:21px var(--serif);margin:0 0 8px}.guide-step p{font-size:12px;line-height:1.8;color:var(--muted)}.exam-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:15px}.exam-top .eyebrow{color:var(--muted)}.timer{font:24px var(--serif);color:var(--muted);font-variant-numeric:tabular-nums}.timer.expired{color:var(--accent)}.exam-progress{height:4px;background:var(--line);border-radius:4px;margin-bottom:34px;overflow:hidden}.exam-progress div{height:100%;background:var(--green)}.exam-question{padding:35px;border:1px solid var(--line);background:var(--paper);border-radius:10px}.exam-question h1{font-size:36px;line-height:1.25;letter-spacing:-.7px;margin:20px 0}.exam-prompt{font:italic 19px var(--serif);color:var(--muted);margin:25px 0 30px}.exam-question .answer-box{margin-top:25px}.exam-checks{display:grid;gap:10px;margin-top:20px}.exam-checks label{font-size:12px;color:var(--muted);display:flex;gap:10px;align-items:center}.exam-checks input{accent-color:var(--green);width:16px;height:16px}.exam-grades{display:flex;gap:10px;margin-top:27px;flex-wrap:wrap}.exam-grades .button{flex:1;white-space:nowrap}.exam-footer{display:flex;align-items:center;justify-content:space-between;margin-top:20px;gap:12px}.exam-footer>span{font-size:10px;color:var(--muted)}.session-result{max-width:700px;margin:0 auto}.result-score{font:70px var(--serif);color:var(--green);margin:15px 0}.result-score small{font:15px var(--sans);color:var(--muted)}.result-row{display:flex;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);font-size:12px}.result-row a{flex:1}.result-row .status-pill{align-self:start}.formula-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.formula-card{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:23px;min-width:0}.formula-card h3{font-size:13px;line-height:1.5;margin:12px 0}.formula-card .formula{border:0;background:var(--surface);margin:15px 0;font-size:16px;padding:15px}.formula-card p{font-size:10px;color:var(--muted);line-height:1.7}.source-group{margin:30px 0}.source-group h2{font-size:25px}.source-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.source-item{background:var(--paper);border:1px solid var(--line);border-radius:7px;padding:16px;display:flex;gap:14px;align-items:center}.pdf-icon{background:var(--warning-bg);color:var(--warning-text);font:10px ui-monospace,monospace;border-radius:5px;padding:9px 7px}.source-item>div{flex:1;min-width:0}.source-item h3{font-size:11px;line-height:1.5;margin:0 0 6px}.source-item p{font-size:9px;color:var(--muted);margin:0}.source-item>span:last-child{color:var(--muted)}.settings-actions{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}.settings-card{max-width:760px;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:9px}.settings-card h2{font-size:26px}.settings-card p{font-size:13px;line-height:1.9;color:var(--muted)}.danger{color:var(--danger)!important}#toast{position:fixed;bottom:24px;left:calc(50% + 126px);transform:translate(-50%,15px);background:var(--toast-bg);color:var(--on-accent);border-radius:7px;padding:12px 20px;font-size:12px;opacity:0;pointer-events:none;transition:.2s;z-index:100;max-width:90vw}#toast.visible{opacity:1;transform:translate(-50%,0)}.result-top{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin:0 0 13px}.print-only{display:none}
@media(min-width:1500px){main{padding-top:50px}.hero{min-height:340px}.hero-art svg{max-height:330px}.week-card{min-height:235px}}
@media(max-width:1180px){.sidebar{width:220px;padding-left:18px;padding-right:18px}.workspace{margin-left:220px}main{padding:32px}.topbar{padding:0 32px}.week-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1.25fr 1fr}.hero h1{font-size:48px}.article-grid{grid-template-columns:minmax(0,1fr) 190px;gap:18px}.breadcrumb{font-size:9px}.top-tools{gap:15px}#toast{left:calc(50% + 110px)}}
@media(max-width:940px){.hero{grid-template-columns:1fr}.hero-art{display:none}.hero h1{font-size:55px}.hero-description{max-width:450px}.breadcrumb{max-width:300px}.offline-label{display:none}.article-grid{grid-template-columns:1fr}.article-sidebar{position:static;display:grid;grid-template-columns:1fr 1fr;gap:12px}.practice-layout{grid-template-columns:1fr}.practice-guide{padding:5px 0}.formula-grid{grid-template-columns:1fr}.source-list{grid-template-columns:1fr}.study-tip{gap:15px;align-items:flex-start}.study-tip .text-link{display:none}.hero{min-height:0}}
@media(max-width:700px){.sidebar{display:none}.workspace{margin-left:0}.topbar{height:64px;padding:0 21px}.mobile-brand{display:flex;gap:8px;font:italic 25px var(--serif);color:var(--accent);align-items:center}.mobile-brand span{font:600 18px var(--sans);color:var(--text);letter-spacing:-.6px}.breadcrumb{display:none}.mobile-nav{display:flex;position:sticky;top:0;z-index:15;justify-content:space-between;padding:12px 21px;background:var(--nav-glass);border-bottom:1px solid var(--line);backdrop-filter:blur(8px);gap:8px}.mobile-nav a{font-size:10px;color:var(--muted)}.mobile-nav a.active{color:var(--accent)}main{padding:26px 21px 45px}.page-topline{margin-bottom:23px}.page-topline .eyebrow{font-size:9px}.page-topline .semester{font-size:8px}.hero h1{font-size:46px;letter-spacing:-1.6px;margin-bottom:20px}.hero-description{font-size:12px}.hero-actions{gap:16px}.button{font-size:11px}.stats{margin:27px 0;padding:17px 0;grid-template-columns:repeat(4,1fr)}.stat{padding:0 11px}.stat strong{font-size:26px}.stat p{font-size:8px}.stat span{font-size:8px}.section-heading h2{font-size:26px}.section-heading .muted{font-size:9px}.week-grid{gap:11px}.week-card{padding:16px;min-height:210px}.week-card h3{font-size:14px}.week-card-top{margin-bottom:18px}.week-card p{font-size:10px}.week-card-top .eyebrow{font-size:7px;letter-spacing:.7px}.topic-icon{width:28px;height:28px;font-size:21px}.study-tip{padding:20px 16px}.study-tip h3{font-size:20px}.study-tip p{font-size:10px}footer{padding:20px 21px;font-size:8px}footer span:first-child{max-width:180px}.page-title h1{font-size:37px;letter-spacing:-1px}.page-title p{font-size:12px}.toolbar{gap:8px}.toolbar select{flex:1;min-width:0}.toolbar .search{flex-basis:100%}.question-row{padding:16px 13px;gap:11px}.question-row h3{font-size:12px}.question-row .q-index{font-size:10px;min-width:18px}.question-row p{font-size:9px}.question-row .status-pill{font-size:8px;padding:3px 7px}.question-header h1{font-size:31px}.answer-box{padding:22px}.answer-box p{font-size:19px;line-height:1.6}.article-section p{font-size:13px}.article-sidebar{grid-template-columns:1fr}.article-sidebar .side-panel{margin:0}.article-actions .button{padding:11px 12px;flex-basis:40%}.setup-card{padding:22px}.exam-question{padding:24px 20px}.exam-question h1{font-size:29px}.exam-grades{gap:8px}.exam-grades .button{flex-basis:40%;padding:10px}.exam-footer{align-items:flex-start}.formula-card{padding:20px}.formula-card .formula{font-size:16px}.question-header .eyebrow{font-size:9px}.empty-state{padding:30px 20px}.settings-card{padding:21px}#toast{left:50%;font-size:11px}.session-result .result-row a{font-size:11px}.back-link{margin-bottom:22px}.save-button{width:34px;height:34px}}
@media(max-width:380px){.week-grid{grid-template-columns:1fr}.hero h1{font-size:41px}.hero-actions{flex-wrap:wrap}.stat{padding:0 8px}.stat strong{font-size:23px}.stat p{font-size:7px}.question-row .status-pill{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.sidebar,.topbar,.mobile-nav,footer,.article-actions,.article-next,.back-link,.save-button,.article-sidebar,textarea,.notes-label{display:none!important}.workspace{margin:0}main{padding:0;max-width:none}.article-grid{display:block}:root[data-theme]{--bg:#fff;--paper:#fff;--text:#222;--text-soft:#333;--muted:#555;--line:#ddd;--selected:#f4f4f4;--surface:#f5f5f5;--warning-bg:#f5f5f5;--warning-text:#444;color-scheme:light}body{background:var(--paper)}.answer-box,.formula,.trap{break-inside:avoid}details{display:block}details>p{display:block}.print-only{display:block}}
.top-tools{gap:17px}.theme-toggle{font-size:23px;width:32px;height:36px;display:grid;place-items:center;color:var(--text-soft)}.telegram-top{display:flex;gap:8px;align-items:center;font-size:10px;color:var(--muted)}.telegram-top img{border-radius:50%;border:1px solid var(--line)}.telegram-top span{max-width:90px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.telegram-card{display:flex;align-items:center;gap:20px;padding:23px;border:1px solid var(--line);background:var(--surface);border-radius:9px;margin-top:17px}.telegram-card img{border-radius:16px}.telegram-card h3{font:23px var(--serif);margin:0 0 7px}.telegram-card p{font-size:12px;color:var(--muted);margin:0}.telegram-card>span{margin-left:auto;font-size:24px;color:var(--accent)}.telegram-detail{display:flex;gap:30px;align-items:center;padding:30px;border:1px solid var(--line);border-radius:12px;background:var(--paper);margin:25px 0}.bot-portrait{border-radius:28px;flex-shrink:0}.telegram-detail h2{font-size:29px;margin-bottom:12px}.telegram-detail p{font-size:13px;color:var(--muted);line-height:1.85;margin-bottom:20px;max-width:600px}.telegram-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:30px 0}.telegram-features h3{font-size:15px}.telegram-features p{font-size:12px;color:var(--muted);line-height:1.85}.theme-preference{margin-top:22px;max-width:300px}#toast{color:#f4f7fb}.week-card-top .eyebrow{font-size:9px}.week-card p{font-size:11px}.route-note{font-size:11px}.mobile-nav{background:var(--nav-glass)}
@media(max-width:700px){.top-tools{gap:10px}.telegram-top span{display:none}.telegram-top img{width:25px;height:25px}.telegram-detail{padding:23px;gap:20px;align-items:flex-start;flex-direction:column}.bot-portrait{width:88px;height:88px;border-radius:23px}.telegram-detail h2{font-size:27px}.telegram-features{grid-template-columns:1fr;gap:13px}.telegram-features h3{margin-bottom:8px}.telegram-features p{margin-bottom:0}.telegram-card{padding:18px;gap:14px}.telegram-card img{width:47px;height:47px;border-radius:12px}.telegram-card h3{font-size:20px}.telegram-card p{font-size:11px}.telegram-card>span{display:none}.telegram-card .button{width:100%}.week-card-top .eyebrow{font-size:8px}.week-card p{font-size:11px}}