@font-face{font-family:MuathArabic;src:local('Segoe UI');font-display:swap}*{box-sizing:border-box} :root{--navy:#142e46;--navy2:#203f58;--orange:#df7925;--orange-dark:#ac4f0b;--warm:#fff2e5;--bg:#f7f8fa;--text:#1b3044;--muted:#657687;--line:#e4e9ee;--green:#257654;--white:#fff;--radius:20px}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:MuathArabic,'Segoe UI',Tahoma,Arial,sans-serif;line-height:1.7;font-size:16px}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}a,button,input,select,textarea{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #b85d13}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.45}h1{font-size:38px;font-weight:750;letter-spacing:-1px}h2{font-size:23px}h3{font-size:19px}p{color:var(--muted)}small{font-size:13px}fieldset{border:0;margin:0;padding:0;min-width:0}legend{padding:0}img{max-width:100%}[hidden]{display:none!important}.skip-link{position:fixed;inset-block-start:-100px;inset-inline-start:20px;background:var(--navy);color:white;padding:10px;z-index:100}.skip-link:focus{inset-block-start:10px}.sidebar{width:258px;position:fixed;inset-inline-start:0;inset-block:0;background:#fff;border-inline-end:1px solid var(--line);display:flex;flex-direction:column;padding:26px 19px 16px;z-index:30}.brand{display:flex;align-items:center;gap:3px;margin-bottom:35px}.brand img{width:74px;height:74px;object-fit:contain;flex-shrink:0}.brand>span{font-size:22px;font-weight:750;letter-spacing:-.8px;white-space:nowrap}.brand>span>span{color:var(--orange)}.brand small{display:block;direction:rtl;font-size:10px;color:var(--muted);font-weight:500;letter-spacing:0}.nav-label{font-size:12px;font-weight:650;margin:0 15px 10px;color:#85909b}.nav-link{display:flex;align-items:center;gap:12px;padding:13px 13px;border-radius:11px;margin-bottom:7px;font-size:14px;font-weight:600;min-height:50px;transition:background .16s,color .16s}.nav-link:hover{background:#f5f7f9}.nav-link.active{background:var(--warm);color:var(--orange-dark)}.nav-link small{font-size:9px;padding:1px 5px;border-radius:4px;background:#f2f4f6;color:#778492;margin-inline-start:auto}.nav-icon{font-family:Arial,sans-serif;font-size:23px;font-weight:500;line-height:1;width:24px;text-align:center}.sidebar-note{margin-top:auto;padding:22px 14px;border-top:1px solid var(--line);font-size:13px}.sidebar-note strong{margin-inline-start:6px}.sidebar-note p{font-size:12px;margin-top:6px}.tiny-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--orange);vertical-align:middle}.profile-link{display:flex;gap:9px;align-items:center;padding:13px 4px 0;border-top:1px solid var(--line)}.profile-link strong{font-size:11px}.profile-link small{display:block;font-size:10px;color:var(--muted)}.profile-link>span:last-child{margin-inline-start:auto}.avatar{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:#edf1f5;color:var(--navy);flex-shrink:0}.app-shell{margin-inline-start:258px}.topbar{height:82px;display:flex;justify-content:space-between;align-items:center;padding:0 42px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.8)}.breadcrumb{display:flex;gap:13px;align-items:center;font-size:12px;color:var(--muted)}.breadcrumb span:first-child{font-weight:750;font-size:11px;letter-spacing:1.2px;color:var(--navy)}.top-actions{display:flex;align-items:center;gap:25px}.progress-chip{display:flex;gap:6px;align-items:center;padding:7px 12px;border:1px solid var(--line);border-radius:24px;font-size:11px;background:#fff}.progress-chip>span{color:var(--orange);font-size:16px}.text-link{font-weight:650;color:var(--orange-dark);font-size:14px;display:inline-block}.text-link:hover{text-decoration:underline}.topbar .text-link{font-size:12px;color:var(--text)}main{max-width:1480px;margin:auto;padding:38px 42px 55px;min-height:calc(100vh - 235px)}.eyebrow{display:block;color:var(--orange-dark);font-size:12px;font-weight:700;letter-spacing:.15px;margin-bottom:10px}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:35px;align-items:center;padding:15px 0 45px}.hero h1{font-size:clamp(32px,3.3vw,52px);line-height:1.55;letter-spacing:-1.3px;margin:12px 0 15px}.hero h1 em{color:var(--orange);font-style:normal}.hero-copy>p{max-width:470px;font-size:15px;line-height:1.95}.button-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.hero .button-row{margin-top:27px}.button{display:inline-flex;gap:18px;align-items:center;justify-content:center;min-height:46px;padding:10px 21px;border:1px solid transparent;border-radius:10px;font-weight:650;font-size:14px;transition:transform .16s,background .16s}.button:hover{transform:translateY(-2px)}.primary{background:var(--orange);color:#fff;border-color:var(--orange)}.primary:hover{background:#c86619}.ghost{border-color:var(--line);background:white;color:var(--navy)}.dark{background:var(--navy);color:white}.light{background:white;color:var(--navy)}.hero-foot{display:flex;gap:18px;margin-top:22px;font-size:10px;color:var(--muted)}.hero-visual{position:relative;padding:20px 8px 48px;min-width:0}.code-window{background:#122b40;box-shadow:0 24px 48px #132f451a;border-radius:17px;overflow:hidden;transform:rotate(-2deg);border:1px solid #30485d;direction:ltr}.window-bar{height:45px;display:flex;gap:6px;align-items:center;border-bottom:1px solid #ffffff12;padding:0 18px;background:#1b354a}.window-bar span{font:11px Consolas,monospace;color:#c2d0d9;margin-right:auto}.window-bar i{width:7px;height:7px;background:#536879;border-radius:50%}.window-bar i:last-child{background:#d58c4c}.hero-visual pre{font:13px/1.9 Consolas,monospace;color:#dce4eb;padding:23px 23px 13px;margin:0}.c-muted{color:#849cad}.c-purple{color:#d5abfc}.c-orange{color:#ffb875}.c-blue{color:#91c9fa}.c-green{color:#b0d8a9}.terminal{margin:8px 20px 18px;padding:12px;background:#0b2235;border-radius:8px}.terminal>span{color:#7c94a6;font:8px Consolas,monospace;letter-spacing:1.5px}.terminal p{font:12px/1.7 Consolas,monospace;color:#b5dbaa;margin-top:7px}.cursor{color:var(--orange);padding-left:5px}.floating-note{position:absolute;bottom:17px;right:0;display:flex;align-items:center;gap:12px;padding:14px 21px;border:1px solid var(--line);background:#fff;border-radius:14px;box-shadow:0 10px 30px #142e4610;transform:rotate(2deg);font-size:12px}.floating-note small{display:block;font-size:10px;color:var(--muted)}.success-circle{background:#e6f4eb;color:var(--green);display:grid;place-items:center;width:31px;height:31px;border-radius:50%;font-size:18px}.visual-tag{position:absolute;bottom:0;left:2px;font:9px Consolas,monospace;color:#8291a0}.overview-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:20px;margin:8px 0 42px}.continue-card,.progress-card{border:1px solid var(--line);background:#fff;border-radius:15px;padding:24px}.continue-card{display:flex;align-items:center;justify-content:space-between;gap:18px;background:linear-gradient(110deg,#fff,#fff8f1)}.continue-card .eyebrow{font-size:10px;margin-bottom:5px}.continue-card h2{font-size:19px}.continue-card p{font-size:11px;margin-top:7px}.continue-card .button{padding:9px 15px;font-size:11px;gap:9px;white-space:nowrap}.progress-card .section-line{font-size:12px}.section-line{display:flex;gap:15px;align-items:center;justify-content:space-between}.section-line>strong{color:var(--orange-dark);font-size:20px;direction:ltr}.progress-track{height:7px;background:#edf0f3;border-radius:10px;overflow:hidden;margin:16px 0 10px}.progress-track>div{width:0;height:100%;background:var(--orange);border-radius:10px;transition:width .5s}.progress-card p{font-size:11px}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;margin-bottom:24px}.section-heading .eyebrow{font-size:10px;margin-bottom:5px}.section-heading h2{font-size:22px}.muted{color:var(--muted)}.section-heading>.muted{font-size:12px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-card{display:block;background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px 20px;position:relative;transition:transform .2s,border-color .2s}.feature-card:hover{transform:translateY(-4px);border-color:#e5b389}.feature-icon{display:inline-grid;width:43px;height:43px;border-radius:12px;place-items:center;font:25px Arial,sans-serif}.feature-icon.orange{background:var(--warm);color:var(--orange-dark)}.feature-icon.blue{background:#eaf0f6;color:#35566e}.feature-icon.pale{background:#f1f3f5;color:#8a97a3}.card-number{position:absolute;left:19px;top:28px;font:11px Consolas,monospace;color:#a5b0bb}.feature-card>.badge{position:absolute;left:15px;top:28px}.feature-card h3{margin:21px 0 10px;font-size:18px}.feature-card p{font-size:12px;line-height:1.9}.card-action{display:flex;justify-content:space-between;color:var(--orange-dark);font-size:11px;margin-top:27px;font-weight:650}.upcoming .card-action{color:var(--muted)}.badge{display:inline-block;padding:4px 10px;border-radius:6px;font-size:10px;white-space:nowrap}.badge.orange{background:var(--warm);color:var(--orange-dark)}.badge.neutral{background:#f0f3f6;color:#6a7784}.badge.green{background:#e9f5ee;color:var(--green)}.featured-lecture{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-top:30px;padding:30px 33px;background:#eaf0f5;border:1px solid #dae3eb;border-radius:15px}.featured-lecture h2{text-align:right;display:flex;direction:ltr;justify-content:flex-end;gap:14px;font-size:23px;flex-wrap:wrap}.featured-lecture h2 span{font-weight:450;color:#4c657c}.featured-lecture p{font-size:13px;margin-top:10px;max-width:600px}.tags{display:flex;gap:9px;flex-wrap:wrap;margin-top:15px}.tags span{font-size:10px;padding:4px 9px;border:1px solid #cfdbe5;border-radius:5px;color:#466176}.signin-banner{margin:30px 0 0;display:flex;gap:16px;align-items:center;padding:0 8px}.google-g{display:inline-grid;place-items:center;color:#356bb3;font-family:Arial,sans-serif;font-size:26px;font-weight:700;background:white;border:1px solid var(--line);border-radius:50%;width:42px;height:42px;flex-shrink:0}.signin-banner p{font-size:11px}.signin-banner a{font-size:11px;margin-inline-start:auto;white-space:nowrap}.footer{margin:0 42px;max-width:1396px;border-top:1px solid var(--line);padding:24px 0;display:flex;gap:24px;align-items:center;font-size:10px;color:#8995a0}.footer p{font-size:10px}.footer-brand{font-size:16px;font-weight:700;color:var(--navy)}.footer>span:last-child{margin-inline-start:auto}.page-heading{margin:8px 0 32px}.page-heading h1{margin-bottom:12px}.page-heading>p{font-size:15px;max-width:780px}.learning-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:28px;align-items:start}.path-panel{background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.path-header{display:flex;align-items:center;gap:17px;padding:25px 28px;border-bottom:1px solid var(--line);background:#fcfdfe}.course-icon{display:grid;place-items:center;width:52px;height:52px;background:var(--navy);border-radius:14px;color:#f8b26b;font:bold 25px Consolas,monospace}.path-header h2{text-align:right;font-size:24px}.path-header p{font-size:12px}.path-header>.badge{margin-inline-start:auto}.lecture-path{padding:15px 28px 32px}.lecture-node{display:flex;align-items:center;gap:20px;padding:26px 0;position:relative;min-height:112px}.lecture-node:not(:last-child):after{content:'';position:absolute;inset-inline-start:24px;top:70px;bottom:-40px;width:2px;background:var(--line)}.path-number{width:49px;height:49px;display:grid;place-items:center;border-radius:50%;font:bold 16px Consolas,monospace;background:#f0f2f5;border:4px solid #fff;color:#8995a0;outline:1px solid var(--line);z-index:1;flex-shrink:0}.available .path-number{background:var(--warm);outline-color:#f0c7a7;color:var(--orange-dark)}.node-copy{flex:1;border-bottom:1px solid var(--line);padding-bottom:20px}.lecture-node:last-child .node-copy{border:0;padding-bottom:0}.node-copy h3{text-align:right;font:650 17px 'Segoe UI',sans-serif}.node-copy p{font-size:12px;margin-top:7px}.node-copy small{font-size:10px;color:var(--muted)}.small.progress-track{height:5px;margin:12px 0 5px}.node-arrow{font-size:18px;color:#9da9b4}.lecture-node:hover h3{color:var(--orange-dark)}.study-aside{display:flex;flex-direction:column;gap:20px}.aside-card{border:1px solid var(--line);border-radius:15px;padding:26px;background:white}.aside-card h2{font-size:27px;line-height:1.6;margin:8px 0 12px}.aside-card p{font-size:13px;margin-top:12px}.aside-card .button{font-size:11px;margin-top:22px;padding:10px 12px;width:100%}.aside-card.navy{background:var(--navy);color:white;border:0}.navy .eyebrow{color:#f8b26b}.navy p{color:#c2ced8}.navy .tags span{border-color:#4e6579;color:#dce6ee}.legend{display:inline-block;width:9px;height:9px;border-radius:50%;margin-inline-end:8px}.legend.orange{background:var(--orange)}.legend.green{background:var(--green)}.legend.gray{background:#a9b4be}.aside-card small{font-size:11px;display:block;color:var(--muted);margin-top:18px}.back-link{font-size:13px;color:var(--muted);display:inline-block;margin-bottom:24px}.back-link:hover{color:var(--orange-dark)}.lecture-banner{display:flex;justify-content:space-between;gap:30px;padding:32px;background:#fff;border:1px solid var(--line);border-radius:18px;margin-bottom:30px}.lecture-banner h1{text-align:right;font-size:36px}.lecture-banner p{font-size:14px;margin-top:12px}.lecture-progress{min-width:150px;display:flex;flex-direction:column;justify-content:center;text-align:center}.lecture-progress>strong{font-size:36px;color:var(--orange-dark);line-height:1.3;direction:ltr}.lecture-progress>span{font-size:11px;color:var(--muted)}.stage-path{padding:0 4px}.stage-node{position:relative;display:flex;gap:22px;align-items:center;min-height:132px;padding:18px 22px;background:white;border:1px solid var(--line);border-radius:14px;margin-bottom:18px;transition:transform .15s,border-color .15s}.stage-node:after{content:'';position:absolute;inset-inline-start:49px;top:100%;height:20px;border-inline-start:2px dashed #d5dfe7}.stage-node:hover{border-color:#e6b68f;transform:translateX(-3px)}.stage-bubble{width:54px;height:54px;background:var(--warm);color:var(--orange-dark);border:1px solid #f0d5be;display:grid;place-items:center;border-radius:17px;flex-shrink:0;font:bold 20px 'Segoe UI',sans-serif}.stage-tick{display:none}.stage-node h2{font-size:19px;margin:5px 0}.stage-node p{font-size:12px;text-align:right}.stage-node small{font-size:10px;color:var(--muted)}.stage-state{font-size:11px;margin-inline-start:auto;color:var(--orange-dark);white-space:nowrap}.stage-node.completed .stage-bubble{background:#e8f4ec;color:var(--green);border-color:#bddeca}.completed [data-stage-number]{display:none}.completed .stage-tick{display:inline}.stage-node.completed .stage-state{color:var(--green)}.lecture-node.completed .path-number{background:#e8f4ec;color:var(--green);outline-color:#bddeca}.mastery-card{border:1px solid #edc39e;background:#fff5e9;border-radius:14px;display:flex;gap:20px;align-items:center;padding:26px;margin-top:26px}.mastery-card h2{font-size:19px}.mastery-card p{font-size:11px;margin-top:7px}.mastery-card>span:last-child{margin-inline-start:auto;color:var(--orange-dark)}.simple-steps{padding-inline-start:21px;color:var(--muted);font-size:13px}.simple-steps li{padding:7px 0}.small-text{font-size:12px}.source-note{font-size:11px;color:var(--muted);padding:5px 12px;line-height:1.9}.empty-state{padding:65px 25px;text-align:center;max-width:720px;margin:0 auto}.empty-icon{display:grid;place-items:center;width:95px;height:95px;background:#edf1f5;color:#6c8194;font-size:40px;border-radius:27px;margin:0 auto 25px}.empty-state h1{margin:18px 0 15px}.empty-state p{line-height:2;font-size:15px;margin-bottom:30px}.empty-state .button-row{justify-content:center}.empty-state>.button{margin-top:0}.panel{background:white;border:1px solid var(--line);border-radius:18px;padding:30px}.form-heading{display:flex;gap:10px;align-items:center;font-weight:700;font-size:19px;margin-bottom:12px}.form-heading>span{border:1px solid var(--line);border-radius:50%;width:31px;height:31px;display:inline-grid;place-items:center;font-size:13px;color:var(--orange-dark)}.lecture-choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}.lecture-choice{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;min-height:80px}.lecture-choice input{accent-color:var(--orange);width:18px;height:18px;flex-shrink:0}.lecture-choice strong{display:block;text-align:right;font-size:14px}.lecture-choice small{display:block;font-size:10px;color:var(--muted)}.lecture-choice .badge{margin-inline-start:auto}.lecture-choice:has(input:checked){border-color:#eab98e;background:#fffaf5}.lecture-choice.disabled{background:#f9fafb;cursor:default;color:#6d7d8a}.count-section{margin:30px 0 25px}input:not([type=radio]):not([type=checkbox]),select,textarea{width:100%;padding:10px 13px;min-height:46px;border:1px solid #cad3dd;border-radius:9px;background:#fff;color:var(--text)}input[type=checkbox],input[type=radio]{accent-color:var(--orange);min-width:18px;min-height:18px}.input-label{display:block;font-size:12px;margin:10px 0 6px}.count-section>p{margin-top:12px}.error-text{color:#a52e30;font-size:13px;margin-top:15px}.assessment-intro{max-width:800px;margin:5px auto;text-align:center;padding:45px}.completion-medal{display:inline-grid;place-items:center;width:75px;height:75px;border-radius:23px;background:#fff0da;color:var(--orange);font-size:40px;margin-bottom:18px}.assessment-intro h1{font-size:30px;margin:6px 0 16px}.assessment-intro p{font-size:14px;margin:15px 0}.assessment-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:23px 0;margin:20px 0;border-block:1px solid var(--line)}.assessment-facts strong{font-size:28px;display:block;color:var(--orange-dark);direction:ltr}.assessment-facts span{font-size:11px;color:var(--muted)}.assessment-intro>.button{margin-top:14px}.stage-heading{margin:0 0 27px}.stage-heading h1{font-size:32px;margin:8px 0}.stage-heading>p{font-size:15px;text-align:right}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:25px;align-items:start}.lesson-card{border:1px solid var(--line);border-radius:17px;background:white;overflow:hidden}.lesson-tabs{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);background:#fafbfc;padding:0 10px}.lesson-tabs>button{padding:18px 3px;border:0;border-bottom:3px solid transparent;background:transparent;color:var(--muted);font-size:11px;min-height:68px}.lesson-tabs>button>span{border-radius:50%;background:#edf0f3;font:11px/22px 'Segoe UI',sans-serif;width:22px;height:22px;display:inline-block;margin-inline-end:6px}.lesson-tabs>button[aria-selected=true]{border-bottom-color:var(--orange);color:var(--orange-dark);font-weight:700}.lesson-tabs>button[aria-selected=true]>span{background:var(--orange);color:white}.lesson-pane{padding:30px;animation:enter .2s ease;min-height:390px}.lesson-pane h2{font-size:23px;margin:3px 0 20px}.lesson-pane>p{font-size:15px;line-height:2;margin-bottom:17px;color:#4f6273}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;padding:20px 30px;border-top:1px solid var(--line)}.lesson-bottom>span{font:12px Consolas,monospace;color:var(--muted);direction:ltr}.code-label{display:flex;justify-content:space-between;padding:10px 16px;background:#20384b;color:#cbd7e0;border-radius:10px 10px 0 0;font:11px 'Segoe UI',sans-serif}.code-block{padding:22px;background:#10283b;color:#f0f5fa;border-radius:0 0 10px 10px;overflow:auto;font:13px/1.9 Consolas,'Courier New',monospace;text-align:left;margin:0 0 22px;tab-size:4;max-width:100%}.code-block code{font:inherit}.hint-box{padding:18px 20px;background:#fff7ec;border-inline-start:3px solid var(--orange);border-radius:8px}.hint-box strong{font-size:13px;color:var(--orange-dark)}.hint-box p{font-size:13px;margin-top:5px;color:#70583f}.simulation-note{font-size:10px!important;color:#7c8b98!important;border-top:1px solid var(--line);padding-top:15px;margin-top:22px}.answer-options{display:grid;gap:12px;margin:25px 0}.answer-option{position:relative;border:1px solid var(--line);border-radius:10px;padding:14px 17px;display:flex;align-items:center;gap:12px;cursor:pointer;font-size:14px;min-height:55px;overflow-wrap:anywhere}.answer-option:hover{background:#fafbfc}.answer-option:has(input:checked){border-color:var(--orange);background:#fff8f1}.answer-option input{margin:0}.option-letter{width:25px;height:25px;display:grid;place-items:center;background:#edf1f5;color:var(--muted);border-radius:6px;font:11px Consolas,monospace;flex-shrink:0}.answer-option:has(input:checked) .option-letter{background:var(--orange);color:white}#check-form legend{font-size:17px;font-weight:650;line-height:1.9}.feedback{padding:18px 20px;margin-top:22px;border-radius:10px;font-size:14px}.feedback.success{background:#e8f5ed;color:#1d6747;border:1px solid #b9ddc6}.feedback.wrong{background:#fff2eb;color:#8a401b;border:1px solid #ecc3ac}.feedback strong{display:block;margin-bottom:6px}.feedback p{color:inherit}.feedback small{display:block;margin-top:9px}.completion{text-align:center;padding:25px 0 5px;animation:celebrate .45s ease}.completion .completion-medal{background:#e9f6ee;color:var(--green)}.completion h2{margin-bottom:10px}.completion p{font-size:13px;margin-bottom:20px}.completion .text-link{display:block;margin-top:15px}.concept-diagram{margin:25px 0 13px;padding:22px 16px;background:#f6f8fb;border:1px solid var(--line);border-radius:12px;text-align:center;overflow:auto}.concept-diagram svg{max-width:100%;height:auto;display:block;margin:auto}.diagram-caption{font-size:10px;margin-top:10px;color:var(--muted)}.diagram-grid{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.diagram-box{padding:13px;border:1px solid #d1dce5;border-radius:9px;background:white;font:13px Consolas,monospace;color:var(--navy)}.diagram-arrow{color:var(--orange);font-size:23px;align-self:center}.diagram-branches{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:450px;margin:15px auto 0}.diagram-branches>div{border:1px solid #d1dce5;padding:14px;border-radius:8px;background:white;font-size:13px}.diagram-branches small{display:block;color:var(--muted);font-size:11px}.truth-table,.data-table{width:100%;border-collapse:collapse;text-align:center;font-size:13px;direction:ltr}.truth-table th,.truth-table td,.data-table th,.data-table td{padding:12px 8px;border:1px solid var(--line)}.truth-table th,.data-table th{background:var(--navy);color:white}.truth-table tr:nth-child(even){background:#fff3e5}.truth-table tr.selected{outline:2px solid var(--orange);outline-offset:-2px}.activity-controls{display:flex;gap:15px;align-items:flex-end;flex-wrap:wrap;margin:24px 0}.activity-controls label{font-size:12px;flex:1;min-width:100px;max-width:260px}.activity-controls label>span{display:block;margin-bottom:7px}.activity-controls .button{min-height:46px}.activity-output{padding:22px;background:#f0f5f9;border:1px solid #d8e2ea;border-radius:12px;margin-top:20px}.activity-output strong{display:block;color:var(--navy);font-size:18px;margin-bottom:7px}.activity-output p{font-size:13px}.output-code{direction:ltr;text-align:left;white-space:pre-wrap;font:15px/1.8 Consolas,monospace;color:#174666;margin:12px 0;overflow-wrap:anywhere}.trace{display:flex;gap:10px;flex-wrap:wrap;margin-top:17px;align-items:center;direction:ltr}.trace-step{border:1px solid #d1dce5;padding:10px 12px;background:white;border-radius:8px;font:12px/1.7 Consolas,monospace}.trace-step.executed{background:#fff1e2;border-color:var(--orange);color:#85420f}.trace-step.skipped{opacity:.5}.trace-step.final{background:#e6f3eb;border-color:#90bea2;color:var(--green)}.trace-label{font-size:10px;color:var(--muted);margin:12px 0 0}.toggle-label{display:flex;gap:8px;align-items:center;max-width:none!important;min-height:46px}.toggle-label span{margin:0!important}.choice-buttons{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.choice-buttons .button{font-size:12px}.choice-buttons .button.selected{background:var(--navy);color:white}.lesson-image{display:block;max-height:420px;object-fit:contain;margin:auto}.lesson-pane figure{margin:22px 0}.lesson-pane figcaption{font-size:10px;text-align:center;color:var(--muted);margin-top:7px}.notice{border:1px solid #e7d0af;background:#fff8ed;color:#7f5827;border-radius:10px;padding:14px 17px;margin:12px 0 20px;font-size:13px}.account-signin{display:flex;flex-direction:column;align-items:flex-start;gap:15px}.account-signin p{font-size:13px}.account-signin h2{font-size:22px}.account-signin .notice{margin:0}.history h2{font-size:22px}.history-row{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:17px 0;gap:20px}.history-row p{font-size:12px}.history-row small{font-size:10px;color:var(--muted)}.history-score{font-size:23px;color:var(--orange-dark);font-weight:750;direction:ltr}.merge-panel{margin:0 0 25px}.merge-panel p{margin:12px 0 20px;font-size:13px}.test-header{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:20px}.test-header h1{font-size:26px}.test-header p{font-size:12px}.test-counter{font:14px Consolas,monospace;color:var(--orange-dark);direction:ltr;white-space:nowrap}.test-card{max-width:850px;margin:auto}.test-card legend{font-size:20px;font-weight:650;line-height:1.9}.test-navigation{display:flex;justify-content:space-between;gap:10px;margin-top:30px}.question-dots{display:flex;flex-wrap:wrap;gap:7px;margin-top:25px;padding-top:20px;border-top:1px solid var(--line);direction:ltr}.question-dots button{width:35px;height:35px;border:1px solid var(--line);border-radius:8px;background:white;color:var(--muted);font:12px Consolas,monospace}.question-dots .answered{background:#fff8f1;color:var(--navy);border-color:var(--orange)}.question-dots [aria-current=true]{background:var(--orange);color:white;border-color:var(--orange)}.result-hero{text-align:center;max-width:800px;margin:0 auto 28px}.result-hero h1{font-size:29px}.result-score{font-size:65px;font-weight:750;direction:ltr;color:var(--orange-dark);line-height:1.4;margin:15px 0}.result-score small{font-size:23px;color:var(--muted)}.result-hero p{font-size:14px}.result-hero .button-row{justify-content:center;margin-top:23px}.topic-breakdown{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0 35px}.topic-item{padding:18px;border:1px solid var(--line);background:white;border-radius:12px}.topic-item strong{font-size:13px}.topic-item span{display:block;font:18px Consolas,monospace;margin:8px 0;direction:ltr;text-align:right}.topic-item .text-link{font-size:10px}.review-row{border-top:1px solid var(--line);padding:20px 0}.review-row h3{font-size:16px;font-weight:650;line-height:1.9}.review-row>p{font-size:13px;margin-top:9px}.review-answer{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px;font-size:12px}.review-answer>span{padding:7px 12px;border-radius:6px;background:#f0f3f6}.review-answer>span.correct{background:#e8f5ed;color:var(--green)}.review-answer>span.incorrect{background:#ffefeb;color:#a23626}.loading-state{padding:80px;text-align:center;color:var(--muted)}.toast{position:fixed;bottom:25px;left:25px;max-width:calc(100vw - 50px);padding:15px 23px;background:var(--navy);color:#fff;border-radius:12px;box-shadow:0 10px 35px #0002;z-index:100;font-size:13px}.analytics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:25px}.stat-card{padding:22px;background:white;border:1px solid var(--line);border-radius:14px}.stat-card>span{font-size:12px;color:var(--muted)}.stat-card strong{display:block;font-size:32px;color:var(--orange-dark);margin-top:6px}.stat-card small{display:block;font-size:11px;margin-top:7px}.admin-tabs{display:flex;gap:10px;border-bottom:1px solid var(--line);padding-bottom:22px;flex-wrap:wrap}.admin-tools{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin:22px 0}.admin-tools label{font-size:12px;width:260px}.admin-tools select{margin-top:6px}.admin-workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:25px;align-items:start}.admin-list{display:flex;flex-direction:column;gap:8px;max-height:800px;overflow:auto}.admin-row{display:flex;align-items:center;border:1px solid var(--line);border-radius:9px;padding:8px;gap:6px}.admin-row>button:first-child{flex:1;text-align:right;background:white;border:0;padding:7px;font-size:12px;color:var(--navy)}.admin-row small{display:block;font-size:9px;color:var(--muted)}.order-button{width:28px;height:35px;border:1px solid var(--line);background:#f7f9fb;border-radius:5px;color:var(--navy)}.admin-form{border:1px solid var(--line);padding:22px;border-radius:12px}.admin-form h2{font-size:20px;margin-bottom:20px}.admin-form>label{display:block;font-size:12px;margin:14px 0}.admin-form>label>input,.admin-form>label>select,.admin-form>label>textarea{margin-top:6px}.admin-form textarea{resize:vertical;min-height:90px}.admin-form .code-input{font:12px/1.8 Consolas,monospace;direction:ltr;text-align:left;min-height:200px}.admin-form label.checkbox{display:flex;gap:10px;align-items:center}.admin-form .button-row{margin-top:20px}.danger{background:#fff1ed;border-color:#e8b4a8;color:#a52f21}.empty-mini{padding:40px 20px;text-align:center;color:var(--muted);font-size:13px}.admin-preview{margin-top:14px}.admin-form .input-note{font-size:10px;color:var(--muted);margin-top:5px}.admin-form .image-uploader{padding:15px;background:#f8fafc;border-radius:9px}.admin-form .image-uploader p{font-size:11px}.admin-form .image-uploader input{font-size:11px}.admin-form .image-uploader img{max-height:120px;display:block;margin-top:10px}.stat-card:empty{display:none}.noscript{padding:15px;background:#fff5dc;color:#8b4e18}.stage-node:not(.completed) .stage-tick{display:none}@keyframes enter{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes celebrate{0%{opacity:0;transform:scale(.97)}60%{transform:scale(1.02)}100%{opacity:1;transform:scale(1)}}
@media(min-width:1600px){.hero h1{font-size:54px}main{padding-top:55px}.hero{padding-bottom:55px}.feature-card{padding:28px}.hero-visual pre{font-size:16px}}
@media(max-width:1200px){.sidebar{width:225px;padding-inline:14px}.app-shell{margin-inline-start:225px}.brand img{width:60px;height:60px}.brand>span{font-size:20px}.topbar{padding-inline:28px}main{padding-inline:28px}.footer{margin-inline:28px}.hero{gap:24px}.hero h1{font-size:35px}.hero-visual pre{font-size:11px;padding:20px 16px}.hero-foot{gap:10px;font-size:9px}.feature-grid{grid-template-columns:repeat(2,1fr)}.overview-grid{grid-template-columns:1fr}.continue-card{padding:22px}.progress-card{padding:22px}.learning-layout{grid-template-columns:minmax(0,1fr) 225px;gap:20px}.lesson-layout{grid-template-columns:minmax(0,1fr)}.lesson-layout>.study-aside{display:none}.lecture-choices{grid-template-columns:1fr}.lecture-banner{padding:25px}.lecture-banner h1{font-size:30px}.admin-workspace{grid-template-columns:210px minmax(0,1fr)}.analytics-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.sidebar{position:sticky;top:0;width:100%;padding:10px 20px 0;border:0;border-bottom:1px solid var(--line);display:block}.brand{margin:0 0 8px;justify-content:center;height:45px}.brand img{width:50px;height:50px}.brand>span{font-size:21px}.brand small{display:none}.sidebar nav{display:flex;overflow-x:auto;gap:7px;padding:0 0 7px;scrollbar-width:none;justify-content:center}.nav-link{white-space:nowrap;gap:7px;padding:8px 13px;font-size:11px;min-height:39px;margin:0}.nav-icon{font-size:17px;width:auto}.nav-link small,.nav-label,.sidebar-note,.profile-link{display:none}.app-shell{margin:0}.topbar{height:60px}.top-actions{gap:18px}.hero{grid-template-columns:1.1fr 1fr;padding-top:10px}.hero h1{font-size:36px}.hero-copy>p{font-size:13px}.hero .button{font-size:12px;padding:10px 15px;gap:10px}.hero-foot{flex-wrap:wrap}.hero-visual pre{font-size:12px}.hero .eyebrow{font-size:10px}.hero-visual{padding-bottom:45px}.hero-foot{gap:13px}.overview-grid{grid-template-columns:1.5fr 1fr;gap:15px}.continue-card{flex-direction:column;align-items:flex-start;gap:14px}.continue-card h2{font-size:17px}.progress-card{display:flex;flex-direction:column;justify-content:center}.progress-card h2{font-size:20px}.progress-card .section-line{font-size:10px}.progress-card p{font-size:10px}.feature-grid{grid-template-columns:repeat(4,1fr);gap:12px}.feature-card{padding:17px 13px}.feature-card h3{font-size:16px}.feature-card p{font-size:10px}.feature-card .card-action{font-size:10px}.feature-card .feature-icon{width:38px;height:38px;font-size:23px}.feature-card>.badge{font-size:8px;left:10px;top:23px}.card-number{left:14px;top:26px}.featured-lecture .button{white-space:nowrap;font-size:12px}.learning-layout{grid-template-columns:minmax(0,1fr) 220px}.topic-breakdown{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){h1{font-size:29px;letter-spacing:-.5px}main{padding:26px 18px 35px}.sidebar{padding:8px 9px 0}.sidebar nav{justify-content:flex-start}.brand{height:42px}.nav-link{padding:8px 10px;font-size:10px;gap:6px}.topbar{padding:0 18px;height:55px}.breadcrumb{font-size:10px;gap:8px}.top-actions{gap:12px}.topbar .text-link{font-size:10px}.progress-chip{font-size:9px;padding:5px 8px;gap:4px}.progress-chip>span{font-size:14px}.hero{grid-template-columns:1fr;gap:22px;padding:0 0 23px}.hero h1{font-size:37px;line-height:1.55;margin:8px 0 12px}.hero-copy>p{font-size:14px;max-width:450px}.hero .button-row{margin-top:22px}.hero .button{font-size:13px;padding:11px 18px}.hero-foot{font-size:9px;gap:15px;margin-top:17px}.hero-visual{max-width:470px;width:100%;margin:0 auto;padding:13px 13px 44px}.hero-visual pre{font-size:12px;padding:17px 20px}.window-bar{height:36px}.hero-visual .terminal{padding:8px 11px;margin-top:0}.floating-note{padding:11px 16px;font-size:11px;right:0;bottom:15px}.floating-note small{font-size:9px}.visual-tag{font-size:8px;bottom:-3px}.overview-grid{grid-template-columns:1fr;margin:15px 0 32px;gap:12px}.continue-card{flex-direction:row;align-items:center;padding:20px 17px;gap:10px}.continue-card .button{font-size:10px;gap:8px;padding:9px 11px;white-space:normal}.continue-card h2{font-size:16px}.continue-card p{font-size:10px}.progress-card{padding:18px 20px}.progress-card .section-line{font-size:11px}.section-heading{align-items:flex-start;margin-bottom:20px}.section-heading h2{font-size:20px;max-width:280px}.section-heading>.muted{display:none}.feature-grid{grid-template-columns:repeat(2,1fr);gap:12px}.feature-card{padding:20px 17px}.feature-card h3{font-size:18px;margin-top:19px}.feature-card p{font-size:11px}.feature-card .card-action{font-size:10px;margin-top:22px}.feature-card .feature-icon{width:40px;height:40px}.feature-card>.badge{top:24px;left:12px;font-size:9px}.featured-lecture{padding:25px 22px;display:block;margin-top:22px}.featured-lecture h2{font-size:21px;gap:8px}.featured-lecture p{font-size:12px}.featured-lecture .button{margin-top:23px;font-size:12px}.tags span{font-size:9px}.signin-banner{flex-wrap:wrap;gap:11px;margin-top:25px;padding:0}.signin-banner p{font-size:11px;flex:1}.signin-banner a{margin-inline-start:53px;font-size:11px}.footer{margin-inline:18px;display:flex;flex-wrap:wrap;gap:12px;padding-block:22px}.footer p{font-size:9px;flex:1}.footer>span:last-child{width:100%;font-size:9px}.footer-brand{font-size:13px}.page-heading{margin-top:2px;margin-bottom:25px}.page-heading h1{font-size:29px}.page-heading>p{font-size:13px}.learning-layout{grid-template-columns:1fr}.study-aside{display:none}.path-header{padding:22px 19px;gap:12px}.path-header h2{font-size:23px}.path-header p{font-size:10px}.path-header>.badge{font-size:9px}.lecture-path{padding:10px 20px 22px}.lecture-node{gap:17px;min-height:110px}.node-copy h3{font-size:16px}.node-copy .badge{font-size:9px;padding:3px 6px}.node-copy p{font-size:11px}.node-arrow{display:none}.lecture-banner{display:block;padding:24px 21px}.lecture-banner h1{font-size:29px}.lecture-banner p{font-size:13px}.lecture-progress{margin-top:23px;display:block;text-align:right}.lecture-progress>strong{font-size:28px;margin-inline-end:10px}.lecture-progress>span{font-size:11px}.lecture-progress .progress-track{margin-top:8px}.stage-path{padding:0}.stage-node{padding:18px 15px;gap:14px;min-height:122px}.stage-bubble{width:45px;height:45px;border-radius:14px;font-size:17px}.stage-node h2{font-size:17px}.stage-node small{font-size:9px}.stage-node p{font-size:11px}.stage-state{font-size:10px}.stage-node:after{inset-inline-start:37px}.mastery-card{padding:22px 17px;gap:14px}.mastery-card h2{font-size:16px}.mastery-card p{font-size:10px}.mastery-card .feature-icon{width:36px;height:36px;font-size:22px}.empty-state{padding:40px 7px}.empty-state h1{font-size:28px}.empty-state p{font-size:13px}.empty-state .button-row{gap:10px}.empty-state .button{font-size:12px}.panel{padding:24px 19px}.lecture-choices{grid-template-columns:1fr 1fr;gap:9px}.lecture-choice{gap:8px;padding:12px 10px;min-height:73px;flex-wrap:wrap}.lecture-choice .badge{display:none}.lecture-choice strong{font-size:13px}.lecture-choice small{font-size:9px}.form-heading{font-size:18px}.assessment-intro{padding:30px 17px}.assessment-intro h1{font-size:26px}.assessment-intro p{font-size:12px}.assessment-facts{gap:8px}.assessment-facts strong{font-size:24px}.assessment-facts span{font-size:9px}.stage-heading h1{font-size:28px}.stage-heading>p{font-size:13px}.lesson-tabs{padding-inline:5px}.lesson-tabs>button{font-size:10px;padding:11px 3px;line-height:1.7;min-height:65px}.lesson-tabs>button>span{display:block;margin:0 auto 3px;width:20px;height:20px;line-height:20px}.lesson-pane{padding:24px 19px;min-height:340px}.lesson-pane h2{font-size:21px}.lesson-pane>p{font-size:14px;line-height:2}.lesson-bottom{padding:17px 19px}.lesson-bottom .button{font-size:12px}.code-block{font-size:11px;padding:17px 13px}.code-label{font-size:9px;padding:10px 13px}.hint-box{padding:15px}.hint-box p{font-size:12px}.concept-diagram{padding:18px 9px}.diagram-box{font-size:10px;padding:10px}.diagram-grid{gap:8px}.diagram-branches{gap:8px}.diagram-branches>div{font-size:11px;padding:10px}.activity-controls{gap:12px}.activity-controls label{min-width:90px}.activity-controls .button{font-size:12px}.activity-output{padding:17px}.trace{gap:7px}.trace-step{font-size:10px;padding:8px}.trace>span:not(.trace-step){font-size:12px}.answer-option{padding:13px 12px;font-size:13px;gap:9px}#check-form legend{font-size:16px}.completion h2{font-size:21px}.completion .button{font-size:12px}.test-header h1{font-size:23px}.test-header p{font-size:10px}.test-counter{font-size:12px}.test-card legend{font-size:18px}.test-navigation .button{font-size:11px;padding:10px 15px}.question-dots{gap:6px}.question-dots button{width:31px;height:33px}.result-hero h1{font-size:25px}.result-score{font-size:55px}.topic-breakdown{gap:10px}.topic-item{padding:15px}.topic-item strong{font-size:12px}.review-row h3{font-size:14px}.review-row>p{font-size:12px}.history-row{gap:14px}.history-score{font-size:20px}.history-row p{font-size:11px}.history-row .text-link{font-size:10px}.history h2{font-size:20px}.merge-panel .button{font-size:12px}.analytics-grid{gap:10px}.stat-card{padding:17px}.stat-card>span{font-size:10px}.stat-card strong{font-size:27px}.admin-panel{padding:19px 14px}.admin-tabs .button{font-size:12px;padding:9px 14px}.admin-tools{gap:12px}.admin-tools label{max-width:190px;font-size:11px}.admin-tools .button{font-size:11px;padding:10px 12px;white-space:nowrap}.admin-workspace{grid-template-columns:1fr}.admin-list{max-height:280px}.admin-form{padding:18px 14px}.admin-form .button{font-size:11px;padding:9px 12px}.notice{font-size:12px}.toast{bottom:15px;left:15px;max-width:calc(100vw - 30px);font-size:12px}.truth-table th,.truth-table td{padding:9px 5px;font-size:11px}.account-signin .button{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
/* Text and controls meet contrast targets on white and the warm backgrounds. */
:root{--orange:#b85b12;--muted:#566878}
.nav-label,.visual-tag,.card-number,.footer,.path-number{color:#566878}
.nav-link small,.badge.neutral{color:#526374}
.simulation-note{color:#566878!important}
.trace-step.skipped{opacity:1;background:#f3f5f7;color:#566878;border-style:dashed}
.question-dots button{min-width:44px;min-height:44px}
.order-button{min-width:44px;min-height:44px}
@media(max-width:900px){.nav-link{min-height:44px}.hero-foot{font-size:10px}}
.concept-title{text-align:right}
.teaching-sections{display:grid;gap:18px}
.teaching-section{display:flex;gap:12px;align-items:flex-start;padding-bottom:17px;border-bottom:1px solid var(--line)}
.teaching-section:last-child{padding-bottom:0;border-bottom:0}
.teaching-number{display:inline-grid;place-items:center;flex:0 0 26px;height:26px;margin-top:4px;border-radius:8px;background:#fff2e5;color:var(--orange-dark);font-size:12px;font-weight:700}
.teaching-section h3{font-size:15px;margin-bottom:6px;color:var(--navy)}
.teaching-section p{font-size:15px;line-height:2.1;color:#435b70;overflow-wrap:anywhere}
.inline-term{display:inline;unicode-bidi:isolate;direction:ltr;font:0.92em/1.8 Consolas,'Courier New',monospace;background:#edf2f7;border-radius:4px;padding:1px 4px;color:#173e5a;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.walkthrough-heading{font-size:17px;margin:24px 0 12px}
.code-walkthrough{padding-inline-start:23px;margin:0 0 23px;color:#435b70}
.code-walkthrough li{font-size:15px;padding:6px 4px;line-height:2.1;overflow-wrap:anywhere}
.code-walkthrough li::marker{font-weight:700;color:var(--orange-dark)}
.english-question{direction:ltr;text-align:left;font-family:'Segoe UI',Arial,sans-serif}
.english-question legend,.english-question h3,.english-question p,.english-question small{text-align:left}
.english-question .answer-option{direction:ltr;text-align:left}
.english-question .option-letter{direction:ltr}
@media(max-width:650px){.teaching-section{gap:10px}.teaching-number{flex-basis:23px;height:23px}.teaching-section h3{font-size:14px}.teaching-section p,.code-walkthrough li{font-size:14px}.inline-term{overflow-wrap:anywhere}.english-question legend{font-size:16px}}
.concept-diagram.flow-concept{padding:0;background:transparent;border:0;overflow:visible;text-align:right}
.flow-figure{padding:22px;border:1px solid var(--line);border-radius:13px;background:#f8fafc;margin-bottom:20px}
.flow-figure-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.flow-figure-heading h3{font-size:17px;color:var(--navy)}
.flow-figure-heading>span{font-size:11px;color:var(--muted);white-space:nowrap}
.flow-tree{max-width:600px;margin:23px auto 0}
.flow-tree-root{width:250px;max-width:100%;padding:13px 18px;margin:auto;background:var(--navy);color:white;border-radius:10px;text-align:center}
.flow-tree-root strong{display:block;font-size:16px}
.flow-tree-root>span{display:block;font-size:12px;color:#d8e3eb;margin-top:3px}
.flow-tree-stem{height:21px;width:2px;background:#b7c9d8;margin:auto}
.flow-tree-children{position:relative;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding-top:20px}
.flow-tree-children:before{content:'';position:absolute;top:0;left:calc(25% - 5px);right:calc(25% - 5px);height:2px;background:#b7c9d8}
.flow-family{position:relative;background:white;border:1px solid #cdd9e3;border-radius:10px;padding:16px 12px;text-align:center}
.flow-family:before{content:'';position:absolute;top:-21px;left:calc(50% - 1px);height:20px;width:2px;background:#b7c9d8}
.flow-family h4{margin:0;font-size:17px;line-height:1.5;color:var(--navy)}
.flow-family p{font-size:13px;margin-top:4px;color:#435b70}
.flow-keywords{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:12px}
.flow-keywords code{font:12px/1.6 Consolas,monospace;padding:3px 7px;border-radius:5px;background:#edf2f7;color:#173e5a}
.flow-figure-note{font-size:12px;text-align:center;line-height:1.9;margin-top:17px}
.flow-figure-intro{font-size:13px;margin-top:9px}
.structure-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:18px}
.structure-tabs button{min-width:0;min-height:64px;border:1px solid #cdd9e3;border-radius:9px;padding:9px 5px;background:white;color:var(--muted)}
.structure-tabs button strong{display:block;font-size:14px;font-weight:650}
.structure-tabs button>span{display:block;font-size:12px;margin-top:2px}
.structure-tabs button[aria-selected=true]{background:var(--navy);border-color:var(--navy);color:white}
.structure-panel{padding:17px 0 0}
.structure-panel>p{font-size:14px;line-height:1.95;color:#435b70;max-width:570px;margin:0 auto;text-align:center}
.flow-concept .structure-chart{display:block;width:min(100%,340px);height:auto;margin:18px auto 0}
.chart-label{font-family:Consolas,'Courier New',monospace;font-size:12px;text-anchor:middle;fill:#142e46}
.chart-boolean{font-size:11px;fill:#435b70}
.flow-symbol-key{font-size:11px;line-height:1.9;text-align:center;margin-top:14px;padding-top:14px;border-top:1px solid var(--line);color:#435b70}
.flow-symbol-key>span{padding-inline:6px}
.flow-term{white-space:nowrap;font:0.94em Consolas,monospace;color:#173e5a}
.flow-concept{scroll-margin-top:125px}
@media(max-width:650px){.flow-figure{padding:17px 12px}.flow-figure-heading h3{font-size:15px}.flow-figure-heading>span{font-size:10px}.flow-tree-root{width:210px}.flow-tree-children{gap:12px}.flow-tree-children:before{left:calc(25% - 3px);right:calc(25% - 3px)}.flow-family{padding:13px 6px}.flow-family h4{font-size:15px}.flow-family p{font-size:12px}.flow-keywords{gap:4px}.flow-keywords code{font-size:10px;padding:3px 5px}.flow-figure-note{font-size:11px}.structure-tabs{gap:6px}.structure-tabs button strong{font-size:12px}.structure-tabs button>span{font-size:11px}.structure-panel>p{font-size:13px}.flow-symbol-key{font-size:10px}}