/* Shared family: WORD LAB surfaces, borders, radius and header rhythm. */
:root{--bg:#101516;--panel:#191f21;--line:#343c3e;--ink:#f0f3ef;--muted:#a1acad;--accent:#7dd3fc;--soft:#19303b}
header{height:83px;max-width:1440px;margin:auto;padding:24px max(32px,5%)}
.logo{width:34px;height:34px;border-radius:8px;font:32px/32px Arial,sans-serif;box-shadow:none}
.brand{gap:12px}.brand b{font-size:18px;letter-spacing:1px}.brand-sub{font-size:14px}
header nav{gap:25px}header [aria-current=page]{color:var(--accent)}
.shell{max-width:1180px;margin:auto;grid-template-columns:224px minmax(0,1fr);gap:28px;padding:0 32px;min-height:calc(100vh - 160px)}
aside{padding:30px 16px 30px 0;position:sticky;top:0;height:calc(100vh - 30px);overflow-y:auto}
main{padding:30px 0 48px;outline:none}h1{font-size:32px}h2{font-size:21px}.panel{border-radius:14px}
.btn{border-radius:8px;padding:12px 20px;display:inline-block;font-size:16px;white-space:nowrap}.primary{background:var(--accent)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 22px;font-size:14px;color:var(--muted);line-height:1.7}
.breadcrumb a:hover{color:var(--accent)}.breadcrumb [aria-current=page]{color:var(--ink)}
.page-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px}.page-heading>div{min-width:0}.page-heading .badge{margin-top:5px;flex-shrink:0}
.subtitle{font-size:16px;line-height:1.8}.home-intro{margin-bottom:26px}.home-intro .eyebrow{margin-bottom:8px}
.home-summary{display:grid;grid-template-columns:1.1fr 1fr;gap:20px;margin-bottom:30px}.home-summary .section-title{margin:0 0 20px}
.resume-card{background:linear-gradient(125deg,#1b3039,#191f21)}.resume-card h2{margin-bottom:16px}.resume-category{font-size:13px;color:var(--accent)}.resume-card h3{margin:5px 0 9px;font-size:20px}.resume-card .btn{margin-top:22px}.resume-card .muted{font-size:14px}
.home-progress{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.home-progress>b{font:52px/1.5 Arial,sans-serif;font-weight:300;color:var(--accent)}.home-progress>b span{font-size:24px}.home-progress>.muted{font-size:14px}
.summary-meta{border-top:1px solid var(--line);padding-top:16px;margin-top:24px;display:flex;gap:20px;color:var(--muted);font-size:14px}.summary-meta b{color:var(--ink);margin-left:5px}
.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.category-card{display:block;padding:22px}.category-card:hover{border-color:#639bb5}.category-card p{font-size:14px;color:var(--muted);margin:7px 0 18px}.category-progress{font-size:13px;color:var(--muted)}
.progressline{height:7px}.level-select{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}.category-hint{margin:0 0 18px}
.lesson-list{display:grid;gap:10px}.lesson-card{display:flex;align-items:flex-start;gap:16px;border-radius:10px;padding:20px;transform:none!important}.lesson-card-body{min-width:0;flex:1}.lesson-number{color:var(--muted);font:16px/1.7 monospace;padding-top:3px}.lesson-card .card-top{margin-bottom:8px}.lesson-card p{font-size:14px}.lesson-card h3{font-size:18px}
.nav-home{display:block;padding:12px 11px;margin-bottom:14px;border-radius:8px;font-size:14px;color:var(--muted)}.nav-home.active{color:var(--accent);background:var(--soft)}
.nav-category-row{display:flex;align-items:center;gap:3px}.cat{padding:11px 10px;margin:1px 0;flex:1;font-size:14px;line-height:1.5}.cat.active{color:var(--accent);background:var(--soft)}
.nav-toggle{width:26px;flex-shrink:0;min-height:36px;border:0;background:none;color:var(--muted);font-size:18px;cursor:pointer}.nav-toggle:hover{color:var(--accent)}
.nav-lessons{padding:5px 0 12px 10px}.nav-lessons[hidden]{display:none}.nav-lesson{display:flex;align-items:flex-start;gap:8px;padding:10px 8px;margin:1px 0;border-radius:6px;font-size:14px;color:var(--muted);line-height:1.6}.nav-lesson>span:first-child{font:12px/1.9 monospace;flex-shrink:0}.nav-lesson>span:nth-child(2){flex:1}.nav-lesson:hover{background:var(--panel);color:var(--ink)}.nav-lesson.active{background:var(--soft);color:var(--accent)}.nav-done{font-size:12px;color:var(--accent)}
.lesson-position{font:13px/1.8 monospace;color:var(--muted);margin-bottom:7px}.lesson-flow{display:grid;gap:20px;max-width:820px}.lesson-flow .block,.lesson-flow .quiz{margin:0}.lesson-flow .demo{position:static}.lesson-flow .demo-stage{max-width:670px}.lesson-flow .controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.lesson-flow .step{font-size:13px;letter-spacing:1px}.lesson-navigation{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.demo-buttons .btn{font-size:14px}.code-label{gap:16px}.code-label button{flex-shrink:0}
.drawer-heading,.mobile-toolbar{display:none}.drawer-backdrop[hidden]{display:none}.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--accent);color:var(--bg);padding:12px}.skip-link:focus{top:10px}
footer{max-width:1440px;margin:auto;padding:22px max(32px,5%)}
@media(max-width:1050px){.shell{grid-template-columns:205px minmax(0,1fr);gap:24px}.home-summary{grid-template-columns:1fr}.brand-sub{display:none}.category-grid{grid-template-columns:1fr}}
@media(max-width:760px){
 header{height:76px;min-height:76px;padding:18px 20px;flex-wrap:nowrap;gap:12px}.brand b{font-size:16px}.brand{gap:9px}.logo{width:32px;height:32px;line-height:30px}header nav{gap:15px;font-size:14px}header nav>a:last-child{display:none}
 .mobile-toolbar{display:flex;align-items:center;gap:16px;margin:0 20px;padding:14px 0;border-bottom:1px solid var(--line)}.mobile-toolbar .btn{font-size:14px;padding:8px 12px;flex-shrink:0}.mobile-toolbar span{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
 .shell{display:block;margin:0;padding:0 20px}main{padding:24px 0 36px}.breadcrumb{margin-bottom:18px;font-size:13px}h1{font-size:27px}.page-heading{gap:12px}.page-heading .badge{font-size:12px;white-space:normal}.home-intro{margin-bottom:22px}
 aside{display:none;position:fixed;inset:0 auto 0 0;width:min(340px,88vw);height:100dvh;border:0;background:var(--bg);padding:20px;overflow-y:auto;z-index:51}.drawer-open{display:block}.drawer-backdrop{position:fixed;inset:0;background:#0009;z-index:50}.drawer-visible{overflow:hidden}.drawer-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.drawer-heading .btn{font-size:14px;padding:7px 12px}.aside-note{display:block}#categories{display:block;overflow:visible;padding:0}.cat{width:auto;white-space:normal}.nav-category-row{align-items:stretch}.nav-toggle{width:40px;min-height:44px}.nav-lesson{padding:12px 10px}
 .home-summary{gap:14px}.category-grid{grid-template-columns:1fr}.home-progress>b{font-size:46px}.section-title>.muted{font-size:13px}.panel{padding:20px}.lesson-flow .controls{grid-template-columns:1fr;gap:14px}.lesson-card{padding:17px;gap:12px}.lesson-card h3{font-size:17px}.lesson-position{font-size:12px}.lesson-navigation .btn{padding:10px 14px;font-size:14px}.btn{font-size:15px}.formula{font-size:15px}.result{font-size:21px}.level-select{flex-wrap:wrap}.code{font-size:13px}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}footer{padding:20px}.brand-sub{display:none}
}