/* Marjaa design tokens. One visual language for all courses. */
:root{color-scheme:dark;--bg:#0d1420;--surface:#141e2c;--surface-alt:#1a2739;--text:#eef2f6;--muted:#a5b3c5;--border:#2b394b;--accent:#e5bd75;--accent-soft:#e5bd7515;--accent-text:#192438;--danger:#f0aaa2;--navy:#101c2c;--radius:16px;--space:24px;--shadow:0 12px 36px #00000012}
:root[data-theme=light]{color-scheme:light;--bg:#f4f5f7;--surface:#fff;--surface-alt:#edf1f6;--text:#18273b;--muted:#59697c;--border:#d7dfe8;--accent:#936318;--accent-soft:#b7883012;--accent-text:#fff;--danger:#a73930;--shadow:0 10px 32px #14243807}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI",Tahoma,Arial,sans-serif;font-size:16px;line-height:1.85;-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}button{border:1px solid transparent;border-radius:10px;background:var(--accent);color:var(--accent-text);padding:10px 18px;font-weight:650;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background .15s,border-color .15s,transform .15s}button:hover{filter:brightness(1.08)}button:active{transform:translateY(1px)}button:disabled{opacity:.55;cursor:default;filter:none;transform:none}button.ghost,.ghost{border:1px solid var(--border);background:transparent;color:var(--text)}button.ghost:hover{background:var(--surface-alt);border-color:var(--muted)}button.text-button{background:transparent;color:var(--accent);padding:8px 4px;border:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}a.ghost{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 12px;min-height:44px;border-radius:10px;font-size:13px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1:focus{outline:none}input,select,textarea{display:block;width:100%;min-height:46px;border:1px solid var(--border);border-radius:10px;padding:10px 12px;color:var(--text);background:var(--bg);font-size:15px}input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}input[type=checkbox]{display:inline-block;width:20px;height:20px;min-height:0;accent-color:var(--accent)}textarea{min-height:140px;resize:vertical;line-height:1.9}label{display:block;font-size:14px;font-weight:600}label>input,label>select{margin-top:7px}h1,h2,h3,p{margin:0}h1{font-size:clamp(27px,3vw,36px);line-height:1.5;font-weight:730;letter-spacing:-.7px}h2{font-size:22px;line-height:1.65;font-weight:700}h3{font-size:17px;line-height:1.8}p{margin:8px 0 16px}em{font-style:normal;color:var(--accent)}strong{font-weight:700}small,.small{font-size:13px}pre{max-width:100%;overflow:auto;background:#0a121e;color:#e8edf5;border:1px solid var(--border);border-radius:12px;padding:20px;margin:16px 0 24px;text-align:left;white-space:pre;font:14px/1.9 Consolas,"Courier New",monospace;tab-size:4}code{font:inherit}summary{cursor:pointer;list-style-position:outside}details>summary{min-height:44px}table{width:100%;border-collapse:collapse;text-align:center;font-variant-numeric:tabular-nums}th,td{padding:12px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-size:14px}.icon{width:21px;height:21px;flex-shrink:0}.muted{color:var(--muted)}.eyebrow{display:block;font-size:12px;letter-spacing:.5px;font-weight:700;color:var(--accent);margin-bottom:8px}.bilingual{display:block}.bilingual>span{display:block;overflow-wrap:anywhere}.translation{color:var(--muted);font-size:.8em;font-weight:400;line-height:1.7;margin-top:4px;text-align:start}.icon-button{background:transparent;border:1px solid var(--border);color:var(--muted);width:44px;height:44px;padding:10px}.icon-button:hover{color:var(--text);background:var(--surface-alt)}.badge{display:inline-flex;border:1px solid var(--border);border-radius:7px;padding:3px 9px;color:var(--muted);font-size:12px;line-height:1.8}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:var(--space)}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:30px 0 16px}.section-head p{margin:0}.section-head h2{font-size:21px}.progress{height:5px;background:var(--border);border-radius:4px;overflow:hidden}.progress i{height:100%;display:block;background:var(--accent);border-radius:4px;max-width:100%;transition:width .2s}.skip-link{position:fixed;top:-80px;right:20px;padding:10px 16px;z-index:100;background:var(--accent);color:var(--accent-text);border-radius:8px}.skip-link:focus{top:12px}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-size:26px;font-weight:750;line-height:1.3;flex-shrink:0}.brand:hover{text-decoration:none}.brand img{width:42px;height:42px;object-fit:contain;border-radius:12px}.brand small{display:block;font-size:10px;font-weight:500;color:var(--muted);letter-spacing:.4px;margin-top:4px}.avatar{display:flex;align-items:center;justify-content:center;background:var(--accent-soft);border:1px solid var(--border);color:var(--accent);width:42px;height:42px;border-radius:50%;font-size:17px;padding:0;flex-shrink:0}.header-actions{display:flex;align-items:center;gap:10px}
/* Portal and course selection. */
.portal{max-width:1150px;margin:auto;padding:0 32px}.portal-header{height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.portal-footer{text-align:center;color:var(--muted);font-size:12px;padding:40px 0 24px;margin-top:56px;border-top:1px solid var(--border)}.subjects-heading{padding:48px 0 8px}.subjects-heading h1{font-size:clamp(32px,4vw,46px)}.subjects-heading>p{color:var(--muted);margin-top:14px}.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.subject-card{padding:28px;transition:border-color .2s}.subject-card:hover{border-color:var(--accent)}.subject-card>.section-head:first-child{margin:0 0 24px}.subject-card>.section-head:last-child{margin:20px 0 0}.subject-card h2{font-size:25px}.course-symbol,.exam-symbol{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border:1px solid var(--border);border-radius:12px;background:var(--surface-alt);color:var(--accent)}.course-symbol .icon{width:26px;height:26px}.course-en{font-size:13px;color:var(--muted);margin:3px 0 16px;text-align:right}.subject-meta{display:flex;gap:16px;font-size:13px;margin:28px 0 16px;color:var(--muted);flex-wrap:wrap}.subject-meta span+span{border-inline-start:1px solid var(--border);padding-inline-start:16px}.local-notice{display:flex;gap:12px;align-items:center;color:var(--muted);max-width:740px;margin:32px auto 0;font-size:13px}.local-notice p{margin:0}.welcome{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:80px;min-height:560px;padding:50px 0}.welcome h1{font-size:clamp(34px,4vw,48px)}.welcome section>p{color:var(--muted);font-size:18px;max-width:500px;margin-top:24px}.welcome-tools{display:flex;gap:24px;color:var(--muted);font-size:14px;margin-top:32px}.welcome-tools span{display:flex;align-items:center;gap:8px}.welcome-tools .icon{color:var(--accent)}.welcome-form{padding:32px;box-shadow:var(--shadow)}.welcome-form h2{margin-bottom:24px}.welcome-form>button{width:100%;margin-top:16px}.welcome-form>p:last-child{margin:20px 0 0;font-size:12px}#nameError{color:var(--danger);margin:8px 0}
/* Shared shell and navigation. */
.study-shell{min-height:100vh}.sidebar{width:250px;position:fixed;inset:0 0 0 auto;padding:30px 18px 20px;background:var(--navy);color:#e5edf6;z-index:30;border-inline-end:1px solid #28374b;display:flex;flex-direction:column;overflow-y:auto}.sidebar .brand{padding:0 12px;color:#f0f3f8;margin-bottom:32px}.sidebar .brand small{color:#a4b3c5}.course-switch{padding:0 10px 20px;border-bottom:1px solid #2b3b50;margin-bottom:12px}.course-switch label{font-size:11px;color:#a7b5c7;font-weight:500}.course-switch select{background:#17273b;color:#e6edf5;border-color:#2c3d52;font-size:12px;min-height:44px;padding:8px}.course-code{display:block;font-size:10px;color:#a7b5c7;margin-top:8px;text-align:right;letter-spacing:1px}.sidebar nav{display:flex;flex-direction:column;gap:2px}.sidebar button{justify-content:flex-start;font-size:13px;font-weight:500;padding:9px 12px;background:transparent;color:#acbbce;border:1px solid transparent;border-radius:8px;min-height:44px}.sidebar button:hover{background:#1a2b40;color:#fff;filter:none}.sidebar .nav-link.active{background:#e5bd7515;border-color:#e5bd7526;color:#e9c887}.sidebar .nav-link.active:before{content:"";position:absolute;inset-inline-start:0;width:3px;height:20px;background:#e5bd75;border-radius:3px}.sidebar .nav-link{position:relative}.sidebar button .icon{width:18px;height:18px}.sidebar .back-subjects{margin-bottom:8px;color:#d6e1ef}.nav-group-label{font-size:10px;letter-spacing:.2px;color:#92a5bb;padding:14px 14px 6px}.sidebar-foot{margin-top:auto;padding:26px 12px 0;font-size:11px;color:#a7b6c9;display:flex;align-items:center;gap:8px}.status-dot{width:6px;height:6px;background:#e5bd75;border-radius:50%;display:inline-block}.main-wrap{margin-inline-start:250px;padding:0 40px;min-width:0}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:92px;border-bottom:1px solid var(--border);max-width:1240px;margin:auto}.topbar strong{display:block;font-size:14px;font-weight:650}.topbar .small{font-size:11px}.main-wrap main{max-width:1180px;margin:auto;padding:32px 0 48px;min-height:65vh}.page-heading{display:flex;justify-content:space-between;margin-bottom:28px}.page-heading .eyebrow{font-size:10px;letter-spacing:2px;text-align:right;color:var(--muted);margin-bottom:7px}.page-heading p{color:var(--muted);font-size:14px;margin-top:8px;max-width:700px}.app-footer{max-width:1180px;margin:auto;padding:20px 0 28px;display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--border);font-size:10px;color:var(--muted)}.menu-toggle,.mobile-tabs{display:none}.nav-backdrop[hidden]{display:none}
/* Course dashboard. */
.study-banner{display:flex;justify-content:space-between;gap:40px;align-items:center;background:var(--surface);border:1px solid var(--border);border-inline-start:3px solid var(--accent);border-radius:var(--radius);padding:28px 32px;margin-bottom:24px}.study-banner h2{font-size:26px}.study-banner p{font-size:13px;color:var(--muted)}.study-banner .eyebrow{font-size:11px}.completion{min-width:180px;max-width:220px;flex:1;padding-inline-start:32px;border-inline-start:1px solid var(--border)}.completion>strong{display:block;font-size:38px;line-height:1.6;color:var(--accent);font-variant-numeric:tabular-nums;text-align:right}.completion>strong>span{font-size:17px;color:var(--muted);font-weight:400}.completion>span{display:block;color:var(--muted);font-size:12px;margin-bottom:14px}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:24px 0 32px}.stat{position:relative;display:flex;flex-direction:column;padding:18px 20px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.stat>span{color:var(--muted);font-size:12px}.stat>strong{font-size:30px;font-weight:650;line-height:1.6;font-variant-numeric:tabular-nums;text-align:right}.stat>strong small{font-size:14px;color:var(--muted);font-weight:400}.stat>.icon{position:absolute;inset-inline-end:16px;top:22px;color:var(--muted);width:17px;height:17px}.chapter-list{display:flex;flex-direction:column;gap:14px}.chapter{display:flex;align-items:center;gap:24px;padding:22px 24px}.chapter-number{font-size:30px;font-weight:300;color:var(--accent);line-height:1;width:46px;flex-shrink:0;letter-spacing:-1px}.chapter-body{flex:1;min-width:0}.chapter-body h3{font-size:18px}.chapter-body h3 .translation{font-size:12px}.chapter-body>p{font-size:12px;margin:8px 0 12px}.chapter-body>.progress{max-width:460px}.chapter-actions{display:flex;flex-direction:column;align-items:stretch;gap:3px;font-size:13px}.chapter-actions>button{font-size:12px}.chapter-body>.resource-chapter-links{margin-top:14px}.chapter-body .resource-chapter-links{gap:8px}.chapter-body .resource-chapter-links a{min-height:36px;font-size:11px;padding:4px 8px;border-color:var(--border)}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.tool-card{display:grid;text-align:right;justify-content:stretch;grid-template-columns:1fr auto;background:transparent;color:var(--text);border:1px solid var(--border);padding:22px;border-radius:12px;gap:10px}.tool-card>strong{font-size:16px;grid-column:1}.tool-card>span{font-size:12px;color:var(--muted);line-height:1.9;grid-column:1}.tool-card>.icon:first-child{color:var(--accent);grid-column:1}.tool-card>.icon:last-child{color:var(--muted);grid-column:2;grid-row:2/4;align-self:center}.tool-card:hover{background:var(--surface);border-color:var(--accent);filter:none}
/* Keep long code examples inside their own scroller, never the page grid. */
.lesson-layout>*{min-width:0}.card{min-width:0}.lesson-menu button>span:last-child{min-width:0;overflow-wrap:anywhere}
/* Shared learning tools. */
.toolbar{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;padding:18px 20px;background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:24px}.toolbar label{min-width:150px;flex:0 1 auto;font-size:12px;color:var(--muted)}.toolbar label.search-field{flex:1;min-width:220px}.toolbar button{font-size:13px}.toolbar select{max-width:320px}.toolbar .checkbox-label{display:flex;align-items:center;gap:10px;min-height:46px;color:var(--text)}.toolbar .checkbox-label input{margin:0}.lesson-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:24px;align-items:start}.lesson-menu{display:flex;flex-direction:column;gap:4px;position:sticky;top:20px;max-height:85vh;overflow:auto;border-inline-end:1px solid var(--border);padding-inline-end:12px}.lesson-menu button{justify-content:flex-start;text-align:right;font-weight:500;font-size:13px;background:transparent;color:var(--muted);padding:10px;gap:12px;border-radius:8px;line-height:1.6}.lesson-menu button.active{color:var(--text);background:var(--accent-soft);border-color:var(--border)}.lesson-menu button:hover{background:var(--surface);filter:none;color:var(--text)}.lesson-menu .translation{font-size:10px}.lesson-status{display:flex;width:20px;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent);font-size:11px}.lesson-status .icon{width:16px;height:16px}.lesson-content{padding:30px}.lesson-content>.section-head{margin:0 0 22px}.lesson-content h2{font-size:26px;margin-bottom:20px}.lesson-content h2 .translation{font-size:14px}.lesson-content h3{margin:24px 0 10px}.lesson-content>p{font-size:16px;line-height:2.1}.lesson-content>.lead{color:var(--accent);font-size:18px}.saved{color:var(--accent)}.saved .icon{fill:var(--accent-soft)}.definition{background:var(--surface-alt);border-inline-start:3px solid var(--accent);padding:18px 20px;border-radius:10px;margin:24px 0}.definition h3{font-size:12px;color:var(--muted);margin:0 0 12px;display:flex;justify-content:space-between;gap:12px}.definition p{margin:0}.definition .translation{font-size:14px;margin-top:12px}.steps{padding-inline-start:26px;line-height:2.1}.steps li{padding:5px 6px}.steps li::marker{color:var(--accent);font-size:13px}.callout{margin:24px 0;background:var(--accent-soft);border-inline-start:3px solid var(--accent);padding:18px 20px;border-radius:8px;font-size:14px;line-height:2}.callout p{margin:6px 0 0}.vocabulary{border:1px solid var(--border);padding:14px 18px;border-radius:10px;margin:24px 0}.vocabulary summary{font-size:13px;font-weight:600;min-height:auto}.vocabulary>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px}.vocabulary p{font-size:13px;margin:0;padding:10px;background:var(--surface-alt);border-radius:6px}.lesson-controls{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0}.lesson-controls button{font-size:13px}.note-editor{border-top:1px solid var(--border);padding-top:24px;margin-top:26px}.note-editor textarea{margin:10px 0 8px;min-height:120px}.source{font-size:11px;color:var(--muted);margin-top:24px}.source .resource-chapter-links{margin:8px 0}.empty-state{text-align:center;padding:56px 24px;border:1px dashed var(--border);border-radius:var(--radius);margin:24px 0;color:var(--muted)}.empty-state>.icon{width:36px;height:36px;color:var(--accent);margin-bottom:10px}.empty-state h2{color:var(--text);font-size:20px}.empty-state p{font-size:14px}.empty-state button{margin-top:12px}.question-progress{display:flex;justify-content:space-between;font-size:12px;margin:20px 0 10px}.question-card{margin:22px auto;max-width:900px;padding:32px}.question-meta{display:flex;gap:12px;align-items:center;font-size:12px;margin-bottom:20px}.question-title{font-size:23px;margin:12px 0 24px}.question-title .translation{font-size:15px;line-height:1.9;margin-top:14px}.choices{display:flex;flex-direction:column;gap:12px;margin:26px 0}.choice{display:flex;align-items:center;justify-content:flex-start;gap:16px;width:100%;text-align:right;background:var(--bg);color:var(--text);border-color:var(--border);padding:16px 18px;font-weight:500;line-height:1.8}.choice:hover{border-color:var(--accent);filter:none}.choice.selected{border-color:var(--accent);background:var(--accent-soft)}.choice-letter{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:1px solid var(--border);border-radius:7px;font-size:12px;flex-shrink:0;color:var(--muted)}.choice.selected .choice-letter{background:var(--accent);color:var(--accent-text);border-color:transparent}.choice .translation{font-size:13px}.answer-input{margin-top:10px;font-size:16px}.code-input{min-height:240px;font:14px/1.9 Consolas,monospace}.question-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--border);margin-top:26px;padding-top:20px}.feedback{border:1px solid var(--border);border-inline-start:3px solid var(--danger);background:var(--bg);padding:20px;border-radius:10px;margin-top:28px}.feedback.is-correct{border-inline-start-color:var(--accent)}.feedback h3{font-size:16px;margin:0 0 14px}.feedback .translation{font-size:14px;margin-top:10px}.feedback .solution{color:var(--accent)}.feedback p:last-child{margin-bottom:0}.checks{padding-inline-start:24px;font-size:13px;line-height:2.2}.checks .translation{font-size:11px;margin:0}.flash-counter{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin:24px auto 14px;max-width:760px}.flashcard{display:flex;flex-direction:column;width:100%;max-width:760px;min-height:340px;margin:0 auto 22px;padding:36px;background:var(--surface);border:1px solid var(--border);color:var(--text);box-shadow:var(--shadow);border-radius:var(--radius);white-space:normal;text-align:center}.flashcard:hover{filter:none;border-color:var(--accent)}.flashcard h2{font-size:28px}.flashcard h2 .translation{font-size:17px;text-align:center}.flashcard p{font-size:17px;line-height:2;max-width:650px;margin-top:24px;font-weight:400}.flashcard p .translation{font-size:15px;text-align:center;margin-top:14px}.flashcard .eyebrow{font-size:11px;margin-bottom:28px}.flip-hint{font-size:12px;color:var(--muted);margin-top:36px}.flash-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.center{text-align:center;margin:18px 0}.review-intro{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-bottom:24px}.review-intro>div>.icon{color:var(--accent);margin-bottom:12px}.review-intro p{color:var(--muted);font-size:14px;margin-bottom:0}.review-intro>button{flex-shrink:0}.review-grid,.notes-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:24px}.review-grid h2{font-size:20px}.review-grid p{color:var(--muted);font-size:14px;margin-top:16px}.review-grid button{font-size:12px;margin-top:8px}.mistake-list{display:flex;flex-direction:column;gap:14px}.mistake-row{display:flex;justify-content:space-between;align-items:center;gap:24px}.mistake-row h2{font-size:17px;margin-top:12px}.mistake-row .translation{font-size:13px}.mistake-row>button{font-size:12px;flex-shrink:0}.glossary-list{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:0 26px}.glossary-list>article{padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid var(--border)}.glossary-list>article:last-child{border:0}.glossary-list h2{font-size:19px;margin:6px 0 16px}.glossary-list h2 .translation{font-size:13px}.glossary-list p{font-size:15px;max-width:740px;margin-bottom:0}.glossary-list p .translation{font-size:13px;margin-top:12px}.glossary-list button{flex-shrink:0;font-size:12px}.backup-card{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px}.backup-card>div:first-child{flex:1;min-width:240px}.backup-card>div>.icon{color:var(--accent);margin-bottom:12px}.backup-card h2{font-size:21px}.backup-card p{font-size:13px;color:var(--muted);margin-bottom:0}.backup-card>p{flex-basis:100%;font-size:12px;border-top:1px solid var(--border);padding-top:16px}.notes-grid h3{font-size:17px;margin:8px 0 12px}.user-note{white-space:pre-wrap;font-size:14px;overflow-wrap:anywhere}.exam-history{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.exam-history>div{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--border);padding:16px 20px;font-size:14px}.exam-history>div:last-child{border:0}.exam-history strong{color:var(--accent);font-size:18px;font-variant-numeric:tabular-nums}
/* Exams and optional course labs. */
.exam-intro{max-width:800px;text-align:center;margin:30px auto;padding:44px}.exam-symbol{margin:0 auto 24px;width:64px;height:64px}.exam-symbol .icon{width:30px;height:30px}.exam-intro h2{font-size:27px}.exam-intro>p{max-width:540px;margin:18px auto;color:var(--muted);font-size:15px}.exam-facts{display:flex;justify-content:center;gap:50px;margin:32px auto;border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:24px 0}.exam-facts span{font-size:12px;color:var(--muted)}.exam-facts strong{display:block;color:var(--text);font-size:30px}.exam-intro .actions{justify-content:center;margin-top:28px}.exam-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px}.exam-clock{font-variant-numeric:tabular-nums;font:600 26px/1.5 Consolas,monospace;color:var(--accent);direction:ltr}.exam-steps{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.exam-steps button{padding:0;width:42px;height:42px;min-height:42px;background:transparent;border-color:var(--border);color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.exam-steps button.answered{background:var(--surface-alt);color:var(--text)}.exam-steps button.active{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.exam-submit{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:900px;margin:auto}.result-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;border:1px solid var(--border);background:var(--surface);padding:28px 32px;border-radius:var(--radius);margin-bottom:28px}.result-score{display:block;color:var(--accent);font-size:52px;line-height:1.6;font-variant-numeric:tabular-nums;text-align:right}.result-score small{font-size:23px;color:var(--muted);font-weight:400}.result-banner p{font-size:13px;color:var(--muted);margin-bottom:0}.exam-review{display:flex;flex-direction:column;gap:14px}.exam-review summary{display:flex;align-items:center;gap:14px;font-size:16px;list-style:none}.exam-review summary:after{content:'+';margin-inline-start:auto;color:var(--muted);font-size:20px}.exam-review details[open] summary:after{content:'−'}.exam-review summary .translation{font-size:12px}.result-mark{color:var(--accent);flex-shrink:0}.review-answer{border-top:1px solid var(--border);padding-top:24px;margin-top:24px}.review-answer h3{font-size:14px;color:var(--muted);margin:20px 0 10px}.review-answer label{max-width:440px;margin:24px 0}.lab-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.lab-grid .card{min-width:0}.gate-inputs{display:flex;gap:30px;margin:28px 0;justify-content:center}.gate-inputs label{display:flex;align-items:center;gap:12px;font-family:Consolas,monospace;font-size:20px}.gate-inputs input{margin:0}.gate-diagram{width:100%;color:var(--text)}.gate-result{text-align:center;font-size:44px;color:var(--accent);font-variant-numeric:tabular-nums}.lab-grid tr.current{background:var(--accent-soft)}
/* Resource module uses these same tokens and primitives in all courses. */
.resource-surface>h1{font-size:32px;margin-bottom:8px}.resource-surface>h1+.logic-en{color:var(--muted);font-size:12px;margin-bottom:24px}.logic-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px;min-width:0}.logic-card h2{font-size:20px;margin:14px 0 18px}.logic-en{font-size:13px;color:var(--muted);display:block;text-align:start}.logic-pair>span{display:block}.logic-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:18px 0}.logic-actions button{font-size:13px}.logic-small{font-size:12px;color:var(--muted)}.logic-note{background:var(--accent-soft);border-inline-start:3px solid var(--accent);padding:16px 20px;border-radius:8px;font-size:14px;margin:18px 0}.resource-chapter-links{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.resource-chapter-links>.resource-chapter-links{margin:0}.resource-doc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.resource-doc-card{margin-bottom:0;display:flex;flex-direction:column;align-items:flex-start}.resource-doc-card h2{margin:12px 0 18px}.resource-doc-card h2 .translation{font-size:13px}.resource-doc-card a{margin-top:auto}.resource-doc-card .logic-actions{margin-bottom:0}.resource-link{font-size:12px}.logic-video{width:100%;aspect-ratio:16/9;background:#09101a;border-radius:10px;border:1px solid var(--border);margin:16px 0}.resource-surface input[type=file]{max-width:100%;font-size:13px}.logic-speed[aria-pressed=true]{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.logic-times{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:20px 0}.logic-times button{display:flex;justify-content:flex-start;gap:12px;background:var(--surface);border:1px solid var(--border);color:var(--text);font-size:13px;text-align:right;font-weight:500}.logic-times b{direction:ltr;font-variant-numeric:tabular-nums;color:var(--accent);min-width:46px}.resource-surface details>summary{font-size:15px;font-weight:600}.resource-surface label{margin:16px 0 8px}.resource-surface .logic-actions>label{margin:0}.resource-surface select{max-width:100%}#resource-video-error{color:var(--danger);font-size:13px}
#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:min(90vw,560px);padding:12px 20px;background:var(--text);color:var(--bg);border-radius:10px;z-index:100;box-shadow:var(--shadow);font-size:13px;text-align:center}#toast[hidden]{display:none}[hidden]{display:none!important}
@media(min-width:1600px){.main-wrap{padding-inline:64px}}
@media(max-width:1200px){.main-wrap{padding:0 24px}.sidebar{width:230px}.main-wrap{margin-inline-start:230px}.lesson-layout{grid-template-columns:220px minmax(0,1fr);gap:16px}.lesson-content{padding:24px}.study-banner{padding:24px}.completion{min-width:150px;padding-inline-start:24px}.chapter{gap:18px}.tool-card{padding:18px}}
@media(max-width:900px){.sidebar{transform:translateX(105%);width:min(300px,85vw);transition:transform .2s;padding-top:calc(24px + env(safe-area-inset-top));padding-bottom:calc(24px + env(safe-area-inset-bottom))}.sidebar.mobile-open{transform:translateX(0)}.nav-backdrop{display:block;position:fixed;inset:0;width:100%;height:100%;border:0;border-radius:0;background:#0008;z-index:25}.menu-open{overflow:hidden}.main-wrap{margin-inline-start:0;padding:0 24px}.topbar{min-height:82px}.topbar .header-actions{gap:8px}.menu-toggle{display:inline-flex}.main-wrap main{padding-top:26px;padding-bottom:32px}.mobile-tabs{display:flex;position:fixed;bottom:0;inset-inline:0;justify-content:space-around;align-items:center;z-index:20;padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -6px 30px #0000000a}.mobile-tabs button{flex:1;display:flex;flex-direction:column;gap:4px;background:transparent;color:var(--muted);padding:6px 2px;border-radius:8px;min-width:0;font-size:10px;font-weight:500;line-height:1.3;min-height:48px}.mobile-tabs .icon{width:20px;height:20px}.mobile-tabs button[aria-current]{color:var(--accent);background:var(--accent-soft)}.app-footer{padding-bottom:calc(100px + env(safe-area-inset-bottom));flex-direction:column;gap:4px}.lesson-menu{top:12px;max-height:70vh}.welcome{gap:36px}.portal{padding:0 24px}.subject-card{padding:24px}#toast{bottom:calc(90px + env(safe-area-inset-bottom))}}
@media(max-width:650px){:root{--space:20px}body{font-size:15px}.portal{padding:0 20px}.portal-header{height:86px;padding-top:env(safe-area-inset-top)}.brand{font-size:24px}.brand img{width:38px;height:38px}.brand small{font-size:9px}.header-actions{gap:8px}.portal-header .ghost{font-size:12px;padding:7px 10px}.portal-header .avatar{display:none}.welcome{grid-template-columns:1fr;gap:32px;padding:36px 0}.welcome h1{font-size:34px}.welcome section>p{font-size:15px;margin-top:20px}.welcome-tools{gap:18px;font-size:12px;margin-top:22px}.welcome-form{padding:24px}.subjects-heading{padding-top:32px}.subjects-heading h1{font-size:34px}.subjects-heading p{font-size:14px}.subject-grid{grid-template-columns:1fr;gap:18px}.subject-card h2{font-size:24px}.subject-card>.section-head:last-child{flex-wrap:wrap}.subject-meta{gap:12px;margin-top:22px}.subject-meta span+span{padding-inline-start:12px}.local-notice{align-items:flex-start;margin-top:24px;font-size:12px}.portal-footer{margin-top:36px;font-size:10px}.main-wrap{padding:0 18px}.topbar{min-height:80px;padding-top:env(safe-area-inset-top)}.topbar>div:first-child{min-width:0}.topbar .small{font-size:9px;display:block;max-width:175px}.topbar strong{font-size:12px}.topbar .avatar{display:none}.topbar .icon-button{width:40px;height:40px;padding:8px;min-height:40px}.topbar .header-actions{gap:7px}.main-wrap main{padding-top:24px}.page-heading{margin-bottom:22px}.page-heading h1{font-size:28px}.page-heading p{font-size:13px}.page-heading .eyebrow{font-size:9px}.study-banner{flex-direction:column;align-items:stretch;gap:22px;padding:22px}.study-banner h2{font-size:23px}.study-banner .actions{gap:8px}.study-banner .actions button{font-size:12px;padding:10px 12px}.completion{max-width:none;min-width:0;padding:16px 0 0;border-inline-start:0;border-top:1px solid var(--border);display:grid;grid-template-columns:1fr auto;align-items:center;gap:6px}.completion>strong{font-size:28px;grid-column:2;grid-row:1}.completion>span{grid-column:1;grid-row:1;margin:0}.completion>.progress{grid-column:1/3;margin-top:4px}.stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.stat{padding:15px 16px}.stat>strong{font-size:27px}.stat>span{font-size:11px}.stat>.icon{width:15px;height:15px;inset-inline-end:14px;top:17px}.section-head{gap:12px;flex-wrap:wrap;margin-top:26px}.section-head h2{font-size:20px}.section-head>.text-button{font-size:12px}.chapter{padding:20px;display:grid;grid-template-columns:30px 1fr;gap:16px}.chapter-number{font-size:25px;width:30px;align-self:start;margin-top:6px}.chapter-body{min-width:0}.chapter-body h3{font-size:18px}.chapter-body h3 .translation{font-size:11px}.chapter-actions{grid-column:2;flex-direction:row;gap:16px;align-items:center;margin-top:0}.chapter-body>.resource-chapter-links{margin-bottom:0}.chapter-body .resource-chapter-links a{min-height:40px}.tool-grid{grid-template-columns:1fr;gap:12px}.tool-card{grid-template-columns:30px 1fr 20px;padding:18px;column-gap:14px;row-gap:3px}.tool-card>.icon:first-child{grid-row:1/3;grid-column:1;align-self:center}.tool-card>strong,.tool-card>span{grid-column:2}.tool-card>.icon:last-child{grid-row:1/3;grid-column:3}.tool-card>strong{font-size:15px}.tool-card>span{font-size:11px}.toolbar{gap:12px;padding:16px}.toolbar label{flex:1;min-width:110px}.toolbar label.search-field{min-width:100%;order:2}.toolbar>button{font-size:12px}.lesson-layout{grid-template-columns:1fr;gap:18px}.lesson-menu{position:static;max-height:205px;padding:12px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.lesson-menu button{font-size:13px;min-height:48px}.lesson-menu .translation{display:none}.lesson-content{padding:20px}.lesson-content h2{font-size:24px}.lesson-content h2 .translation{font-size:13px}.lesson-content>p{font-size:15px}.lesson-content>.lead{font-size:17px}.lesson-content h3{font-size:15px}.definition{padding:16px}.definition .translation{font-size:13px}.lesson-controls button{font-size:12px;padding:10px 12px}pre{padding:16px;font-size:12px;line-height:1.9}.question-card{padding:20px;margin-top:20px}.question-title{font-size:21px}.question-title .translation{font-size:14px}.choice{padding:14px;gap:12px;font-size:15px}.choice .translation{font-size:12px}.choice-letter{width:27px;height:27px}.question-footer{gap:12px;flex-wrap:wrap}.question-footer button{font-size:12px;padding:10px 13px}.question-footer .actions{gap:8px}.question-footer>.text-button{margin-inline-start:auto}.feedback{padding:16px}.feedback .translation{font-size:13px}.flashcard{min-height:320px;padding:26px 20px}.flashcard h2{font-size:25px}.flashcard h2 .translation{font-size:15px}.flashcard p{font-size:16px}.flashcard p .translation{font-size:14px}.flash-actions{gap:8px}.flash-actions button{font-size:12px;padding:10px 12px}.flash-counter{font-size:12px}.review-intro{flex-direction:column;align-items:flex-start;padding:22px}.review-intro h2{font-size:23px}.review-grid,.notes-grid{grid-template-columns:1fr}.mistake-row{flex-direction:column;align-items:flex-start;gap:16px}.mistake-row h2{font-size:17px}.glossary-list{padding:0 20px}.glossary-list>article{flex-direction:column;align-items:flex-start;gap:14px}.glossary-list h2{font-size:20px}.glossary-list p{font-size:14px}.backup-card{padding:20px}.backup-card>div:first-child{min-width:0}.backup-card .actions button{font-size:12px}.exam-history>div{flex-wrap:wrap;padding:14px 16px;font-size:13px}.exam-history .small{flex-basis:100%}.exam-intro{padding:28px 20px}.exam-intro h2{font-size:24px}.exam-intro>p{font-size:14px}.exam-facts{gap:30px;margin:26px auto}.exam-facts strong{font-size:27px}.exam-toolbar{gap:8px;flex-wrap:wrap}.exam-toolbar .badge{font-size:11px}.exam-toolbar button{font-size:11px;padding:8px 12px}.exam-clock{font-size:23px}.exam-steps{gap:7px}.exam-steps button{width:40px;min-height:40px;height:40px}.exam-submit{flex-direction:column;align-items:flex-start}.result-banner{padding:24px;flex-direction:column;align-items:flex-start}.result-score{font-size:46px}.exam-review>.card{padding:18px}.exam-review summary{font-size:15px;gap:10px}.exam-review summary .translation{font-size:11px}.lab-grid{grid-template-columns:1fr;gap:18px}.logic-card{padding:20px}.resource-doc-grid{grid-template-columns:1fr}.resource-surface>h1{font-size:28px}.resource-doc-card h2{font-size:20px}.logic-times{grid-template-columns:1fr}.logic-times button{min-height:48px}.logic-actions button{font-size:12px}.vocabulary>div{grid-template-columns:1fr}.app-footer{font-size:9px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{body{background:white;color:#111;font-size:12px}.sidebar,.topbar,.mobile-tabs,.toolbar,.app-footer,.portal-header,button,.skip-link,#toast{display:none!important}.main-wrap{margin:0;padding:0}main{max-width:none!important;padding:0!important}.card,.glossary-list{border-color:#bbb;background:white;break-inside:avoid}.translation,.muted{color:#444}pre{color:#111;background:#f5f5f5;white-space:pre-wrap}.definition{background:#eee}.glossary-list>article{break-inside:avoid}}