:root{
  --bg:#ffffff;
  --surface:#f7f8fa;
  --surface-2:#f1f3f6;
  --ink:#16191d;
  --ink-2:#2a2f36;
  --muted:#68717d;
  --line:#dfe3e8;
  --line-strong:#c9cfd6;
  --accent:#2357d8;
  --accent-hover:#1947b8;
  --accent-soft:#edf3ff;
  --success:#147a4b;
  --danger:#b42318;
  --dark:#171a1f;
  --radius:12px;
  --shadow:0 10px 32px rgba(22,25,29,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{color:inherit}
img,svg{max-width:100%}
main{min-height:65vh}
.container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.nav-wrap{min-height:68px;display:flex;align-items:center;gap:30px}
.brand{display:inline-flex;align-items:baseline;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
.brand-word{font-size:22px}
.brand-domain{font-size:14px;color:var(--muted);margin-left:1px}
.main-nav{display:flex;align-items:center;gap:24px;flex:1;font-size:14px;color:#4f5863}
.main-nav a{padding:24px 0;position:relative}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-login{font-size:14px;font-weight:650;color:#424a55}
.nav-login:hover{color:var(--accent)}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px;cursor:pointer}
.nav-toggle>span:not(.sr-only){display:block;height:2px;background:#1d232b;margin:4px 0;border-radius:2px}

/* Buttons */
.btn{min-height:44px;padding:10px 16px;border:1px solid transparent;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;cursor:pointer;transition:background .16s,border-color .16s,color .16s,transform .16s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:#fff;border-color:var(--line-strong);color:var(--ink)}
.btn-secondary:hover{border-color:#939ca7}
.btn-ghost{background:#fff;border-color:var(--line)}
.btn-lg{min-height:50px;padding:12px 19px}
.btn-compact{min-height:40px;padding:8px 13px}
.btn-light{background:#fff;color:#171a1f;border-color:#fff}

/* Type */
.eyebrow{margin:0 0 10px;color:var(--accent);font-size:12px;line-height:1.2;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
h1,h2,h3{color:var(--ink);font-weight:760;letter-spacing:-.035em}
h1{font-size:clamp(40px,5.2vw,68px);line-height:1.02;margin:0 0 20px}
h2{font-size:clamp(30px,3.6vw,44px);line-height:1.08;margin:0 0 16px}
h3{font-size:20px;line-height:1.25;margin:0}
.lead{margin:0;color:#4d5661;font-size:19px;line-height:1.65;max-width:720px}
.muted{color:var(--muted)}

/* Home hero */
.hero{padding:72px 0 0;border-bottom:1px solid var(--line);background:#fff}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(380px,.92fr);gap:72px;align-items:center;padding-bottom:58px}
.hero-copy h1{max-width:780px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.hero-search{max-width:660px;margin-top:28px;border:1px solid var(--line-strong);border-radius:10px;display:flex;align-items:center;background:#fff;box-shadow:0 3px 14px rgba(22,25,29,.04);overflow:hidden}
.hero-search svg,.catalog-search svg{width:19px;height:19px;fill:none;stroke:#7a8490;stroke-width:1.8;margin-left:14px;flex:0 0 auto}
.hero-search input{min-width:0;flex:1;height:52px;border:0;outline:0;padding:0 14px;background:transparent;color:var(--ink)}
.hero-search button{height:40px;margin-right:6px;border:0;border-radius:8px;padding:0 18px;background:var(--dark);color:#fff;font-weight:750;cursor:pointer}
.assessment-panel{border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow);overflow:hidden}
.assessment-panel-head{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;padding:20px 22px;border-bottom:1px solid var(--line)}
.assessment-panel-head>div{display:grid;gap:3px}
.assessment-panel-head span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:750}
.assessment-panel-head strong{font-size:19px}
.assessment-panel-head>a{font-size:13px;color:var(--accent);font-weight:700}
.assessment-list{display:grid}
.assessment-list>a{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:17px 22px;border-bottom:1px solid var(--line);transition:background .15s}
.assessment-list>a:hover{background:#f8f9fb}
.assessment-list span{display:grid;gap:4px}
.assessment-list b{font-size:15px}
.assessment-list small{font-size:12px;color:var(--muted);text-transform:capitalize}
.assessment-list i{font-style:normal;color:#7b8490;font-size:18px}
.assessment-note{margin:0;padding:16px 22px;color:var(--muted);font-size:12px;background:#fafbfc}
.trust-strip{display:grid;grid-template-columns:repeat(3,1fr) 1.7fr;border-top:1px solid var(--line)}
.trust-strip>div{padding:22px 24px 24px 0;display:grid;gap:2px}
.trust-strip>div+div{border-left:1px solid var(--line);padding-left:24px}
.trust-strip strong{font-size:23px;letter-spacing:-.025em}
.trust-strip span{font-size:13px;color:var(--muted)}
.trust-strip .trust-text strong{font-size:15px;letter-spacing:0}

/* Sections */
.section{padding:78px 0}
.section-soft{background:var(--surface);border-top:1px solid #eceff2;border-bottom:1px solid #eceff2}
.section-dark{background:var(--dark);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .eyebrow{color:#9db8ff}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px}
.section-head>div>p:not(.eyebrow){margin:7px 0 0;color:var(--muted);font-size:15px}
.section-head h2{margin-bottom:0}
.section-head>a{font-size:14px;font-weight:750;color:var(--accent);white-space:nowrap}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.quiz-tile{display:flex;min-height:206px;flex-direction:column;border:1px solid var(--line);border-radius:11px;padding:20px;background:#fff;transition:border-color .15s,box-shadow .15s,transform .15s}
.quiz-tile:hover{border-color:#aeb6c0;box-shadow:0 8px 22px rgba(22,25,29,.06);transform:translateY(-2px)}
.quiz-tile-meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.04em;font-weight:750}
.quiz-tile h3{font-size:20px;margin:18px 0 8px}
.quiz-tile p{font-size:13px;color:var(--muted);margin:0 0 20px}
.tile-link{margin-top:auto;color:var(--accent);font-size:13px;font-weight:750}
.role-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.role-grid a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:17px 18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-weight:650;font-size:14px}
.role-grid a:hover{background:#fafbfc;color:var(--accent)}
.role-grid b{color:#8a939d}
.process-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start}
.process-copy p:not(.eyebrow){color:var(--muted);font-size:17px;max-width:500px;margin:0 0 24px}
.process-list{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.process-list li{display:grid;grid-template-columns:56px 1fr;gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}
.process-list>li>span{color:var(--muted);font-size:12px;font-weight:800;letter-spacing:.08em}
.process-list strong{font-size:17px}
.process-list p{margin:4px 0 0;color:var(--muted);font-size:14px}
.dark-split{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:center}
.dark-split>div:first-child>p:not(.eyebrow){color:#aeb6c0;font-size:17px;margin:0 0 24px;max-width:520px}
.certificate-preview{border:1px solid #3d434c;background:#1e2228;border-radius:10px;padding:28px;min-height:300px;display:grid;grid-template-columns:1fr auto;gap:28px;color:#fff}
.certificate-preview-top{grid-column:1/-1;display:flex;justify-content:space-between;border-bottom:1px solid #3d434c;padding-bottom:18px}
.certificate-preview-top strong{font-size:22px}.certificate-preview-top span{font-size:11px;letter-spacing:.12em;color:#9ea7b2}
.certificate-preview small{display:block;color:#9ea7b2;text-transform:uppercase;letter-spacing:.08em;font-size:10px;margin-bottom:7px}
.certificate-preview b{font-size:24px}
.certificate-preview-score{align-self:center;display:flex;align-items:baseline}.certificate-preview-score strong{font-size:58px;line-height:1}.certificate-preview-score span{font-size:20px;color:#9ea7b2}
.certificate-preview-bottom{grid-column:1/-1;align-self:end;display:flex;justify-content:space-between;color:#9ea7b2;font-size:11px;border-top:1px solid #3d434c;padding-top:18px}
.ai-row{border:1px solid var(--line);border-radius:12px;padding:30px 34px;display:flex;align-items:center;justify-content:space-between;gap:40px}
.ai-row h2{font-size:32px;margin-bottom:8px}.ai-row p:not(.eyebrow){margin:0;color:var(--muted);max-width:720px}

/* Catalog */
.catalog-shell{padding:54px 0 76px}
.catalog-head{display:grid;grid-template-columns:1fr auto;align-items:end;gap:32px;margin-bottom:28px}
.catalog-head h1{font-size:clamp(38px,5vw,58px);margin-bottom:12px}
.catalog-intro{margin:0;color:var(--muted);font-size:17px;max-width:760px}
.catalog-summary{display:grid;min-width:150px;padding-left:28px;border-left:1px solid var(--line)}
.catalog-summary strong{font-size:28px;letter-spacing:-.04em}.catalog-summary span{font-size:12px;color:var(--muted)}
.catalog-toolbar{display:grid;grid-template-columns:minmax(260px,1.5fr) minmax(150px,.55fr) minmax(180px,.75fr) auto auto;gap:10px;align-items:end;padding:14px;border:1px solid var(--line);background:var(--surface);border-radius:11px;margin-bottom:20px}
.catalog-search{height:46px;display:flex;align-items:center;background:#fff;border:1px solid var(--line-strong);border-radius:8px}
.catalog-search input{height:44px;min-width:0;flex:1;border:0;outline:0;padding:0 12px;background:transparent}
.filter-field{display:grid;gap:5px}.filter-field>span{font-size:11px;color:var(--muted);font-weight:700;margin-left:1px}.filter-field select{height:46px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;padding:0 36px 0 11px;color:var(--ink)}
.clear-filters{align-self:center;color:var(--muted);font-size:13px;font-weight:650;padding:0 4px}.clear-filters:hover{color:var(--accent)}
.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.test-card{display:flex;min-width:0;min-height:176px;flex-direction:column;border:1px solid var(--line);border-radius:10px;padding:18px 19px;background:#fff;transition:border-color .15s,box-shadow .15s}
.test-card:hover{border-color:#a9b2bd;box-shadow:0 6px 18px rgba(22,25,29,.055)}
.test-card-top{display:flex;justify-content:space-between;gap:14px;margin-bottom:16px}
.test-kind{font-size:11px;color:var(--muted);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.test-level{font-size:11px;color:#3d4d66;font-weight:750;background:#f0f3f7;padding:3px 7px;border-radius:5px;white-space:nowrap}
.test-card h2{font-size:19px;line-height:1.25;margin:0 0 7px;letter-spacing:-.02em}.test-card>p{font-size:12px;color:var(--muted);margin:0 0 18px}
.test-card-bottom{margin-top:auto;padding-top:13px;border-top:1px solid #edf0f2;display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px}.test-card-bottom b{color:var(--accent);font-weight:750}
.pagination{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:center;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}
.pagination a{font-size:13px;font-weight:750;color:var(--accent)}.pagination a:last-child{text-align:right}.pagination strong{font-size:12px;color:var(--muted);font-weight:700}
.empty-state{border:1px dashed var(--line-strong);border-radius:10px;padding:42px;text-align:center;background:#fafbfc}.empty-state strong{font-size:20px}.empty-state p{color:var(--muted)}

/* Legacy page patterns */
.page-head,.product-hero,.seo-hero{width:min(1180px,calc(100% - 40px));margin:0 auto;padding:54px 0 28px}
.page-head h1,.product-hero h1,.seo-hero h1{font-size:clamp(38px,5vw,58px);margin:0 0 14px}
.page-head>p:not(.eyebrow),.product-hero>p:not(.eyebrow),.seo-hero>p:not(.eyebrow){margin:0;color:var(--muted);font-size:17px;max-width:820px}
.directory-section{width:min(1180px,calc(100% - 40px));margin:0 auto 42px}.directory-section h2{font-size:28px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.chip-grid,.chip-cloud{display:flex;flex-wrap:wrap;gap:8px}.chip-grid{width:min(1180px,calc(100% - 40px));margin:0 auto 60px}.directory-section .chip-grid{width:auto;margin:0}.chip-grid a,.chip-grid span,.chip-cloud a{border:1px solid var(--line);border-radius:7px;padding:8px 11px;background:#fff;font-size:13px;font-weight:650}.chip-grid a:hover,.chip-cloud a:hover{border-color:#aeb6c0;color:var(--accent)}
.tag,.pill,.quiz-meta span{display:inline-flex;border-radius:5px;background:#f0f3f7;color:#4c5663;font-size:11px;padding:5px 8px;font-weight:750;text-transform:none}
.split-panel{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}.split-panel>div>p{color:var(--muted)}
.feature-list{display:grid;border-top:1px solid var(--line)}.feature-list>div{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--line)}.feature-list b{font-size:11px;color:var(--muted)}.feature-list span{display:grid;color:var(--muted);font-size:13px}.feature-list strong{color:var(--ink);font-size:15px}
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#3a4048;border:1px solid #3a4048}.category-grid a{padding:20px;background:var(--dark)}.category-grid h3{color:#fff;margin:0 0 14px;font-size:17px}.category-grid span{color:#aab4c1;font-size:12px}

/* Quiz */
.quiz-shell{width:min(900px,calc(100% - 36px));margin:48px auto 72px}.quiz-head{padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:26px}.quiz-head h1{font-size:clamp(34px,4.5vw,52px);margin:10px 0 12px}.quiz-head>p{color:var(--muted);font-size:16px;max-width:760px}.crumb{display:inline-block;font-size:12px;color:var(--accent);font-weight:750;margin-right:8px}.quiz-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:16px}
.quiz-form{position:relative}.quiz-form:before{content:"";display:block;position:sticky;top:68px;z-index:20;height:3px;width:var(--quiz-progress,0);background:var(--accent);transition:width .2s}
.question-card{border-bottom:1px solid var(--line);padding:26px 0;margin:0}.question-card:first-of-type{padding-top:8px}.question-number{font-size:11px;color:var(--muted);font-weight:750;text-transform:uppercase;letter-spacing:.04em}.question-card h2{font-size:22px;line-height:1.35;letter-spacing:-.02em;margin:10px 0 18px}.answers{display:grid;gap:8px}.answer{display:flex;align-items:flex-start;gap:11px;border:1px solid var(--line);padding:12px 13px;border-radius:8px;cursor:pointer;background:#fff;transition:border-color .12s,background .12s}.answer:hover{border-color:#adb5bf}.answer:has(input:checked){border-color:#6284da;background:#f5f8ff}.answer input{margin-top:3px}.quiz-form>.btn{margin-top:24px}

/* Auth, profile, admin */
.auth-card{width:min(520px,calc(100% - 28px));margin:58px auto 76px;padding:28px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow)}.auth-card h1{font-size:36px;margin:8px 0 18px}.auth-card form,.panel form{display:grid;gap:14px}.auth-card label,.panel label{display:grid;gap:6px;font-size:13px;font-weight:700}.auth-card input,.panel select,.panel input{width:100%;min-height:45px;border:1px solid var(--line-strong);border-radius:8px;padding:9px 11px;background:#fff}
.notice{padding:12px 14px;border-radius:8px;background:var(--accent-soft);color:#314f91;margin:14px 0}.notice.error{background:#fff0ee;color:#9d2a20}
.panel{border:1px solid var(--line);border-radius:10px;padding:22px;background:#fff}.admin-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding-bottom:64px}.admin-card{padding:18px;border:1px solid var(--line);border-radius:9px;display:flex;flex-direction:column;gap:9px}.admin-card span{color:var(--muted);font-size:12px}.admin-card strong{font-size:30px}
.profile-hero{display:flex;gap:20px;align-items:center;padding:48px 0 28px}.profile-hero h1{font-size:42px;margin:5px 0}.avatar-placeholder{width:72px;height:72px;border-radius:10px;background:#1c2127;color:#fff;display:grid;place-items:center;font-size:27px;font-weight:800;flex:0 0 auto}.profile-stats{display:flex;gap:18px;margin:12px 0 16px;color:var(--muted);font-size:13px}.profile-stats span{display:flex;gap:5px}.profile-stats strong{color:var(--ink)}.profile-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:14px;padding-bottom:70px}.skill-map{display:grid;gap:13px}.meter{height:7px;border-radius:99px;background:#e8ebef;overflow:hidden}.meter i{display:block;height:100%;background:var(--accent)}.meter.light{background:#eef1f5}.skill-map small{color:var(--muted)}.certificate-list{display:grid;gap:8px}.certificate-list a{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;padding:12px}.certificate-list span{font-size:12px;color:var(--muted)}.empty-mini,.empty-card{padding:18px;border:1px dashed var(--line-strong);border-radius:8px;color:var(--muted)}

/* SEO / learning */
.question-preview{display:grid;gap:8px}.question-preview>div{border:1px solid var(--line);padding:13px;border-radius:8px;display:grid;gap:4px}.question-preview small{color:var(--muted)}.question-bank{display:grid;gap:8px;padding-bottom:40px}.question-bank details{border:1px solid var(--line);border-radius:8px;background:#fff}.question-bank summary{padding:15px;cursor:pointer;font-weight:700;display:flex;gap:12px}.question-bank summary span{color:var(--accent);min-width:24px}.answer-explanation{padding:0 15px 16px 51px;color:#4f5863}.learning-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding-bottom:32px}.learning-steps article{border:1px solid var(--line);border-radius:10px;padding:20px}.learning-steps b{color:var(--accent)}.learning-steps h2{font-size:26px}.learning-steps p{color:var(--muted)}.learning-steps a{font-weight:700;color:var(--accent)}
.leaderboard{width:min(900px,calc(100% - 40px));margin:0 auto 70px}.leaderboard article{display:grid;grid-template-columns:55px 1fr auto;gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}

/* Certificates/results */
.certificate-card{border:1px solid var(--line);border-radius:10px;padding:28px;background:#fff;box-shadow:var(--shadow)}.certificate-shell,.result-shell{width:min(900px,calc(100% - 36px));margin:48px auto 72px}.certificate-brand{font-weight:800}.certificate-meta,.certificate-bottom{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:12px}.certificate-score,.score-ring{font-size:46px;font-weight:800}.share-row{display:flex;gap:8px;flex-wrap:wrap}.review-list{display:grid;gap:10px}.review{border:1px solid var(--line);border-radius:8px;padding:14px}.is-ok,.ok{color:var(--success)}.is-bad,.bad{color:var(--danger)}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:#fafbfc;padding:46px 0 22px;color:#505964}
.footer-grid{display:grid;grid-template-columns:1.8fr repeat(3,1fr);gap:36px}.footer-grid>div{display:flex;flex-direction:column;gap:8px;font-size:13px}.footer-grid strong{color:var(--ink);font-size:12px;text-transform:uppercase;letter-spacing:.04em}.footer-grid p{max-width:360px;margin:4px 0;color:var(--muted)}.footer-grid a:hover{color:var(--accent)}.footer-bottom{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);margin-top:34px;padding-top:18px;color:#858d97;font-size:11px}

@media(max-width:1050px){
  .main-nav{gap:16px}.main-nav a{font-size:13px}
  .hero-grid{grid-template-columns:1fr 380px;gap:40px}
  .catalog-toolbar{grid-template-columns:1fr 1fr 1fr auto}.catalog-search{grid-column:1/-1}.clear-filters{display:none}
}
@media(max-width:900px){
  .nav-toggle{display:block}.main-nav{display:none;position:absolute;left:20px;right:20px;top:61px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:8px;border-radius:10px;flex-direction:column;align-items:stretch;gap:0}.main-nav a{padding:12px 13px;border-bottom:1px solid #eef0f2}.main-nav a:last-child{border-bottom:0}.main-nav a:hover:after{display:none}.site-header.nav-open .main-nav{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:34px}.assessment-panel{max-width:680px}.trust-strip{grid-template-columns:repeat(2,1fr)}.trust-strip>div:nth-child(3){border-left:0}.trust-strip>div:nth-child(n+3){border-top:1px solid var(--line)}
  .card-grid{grid-template-columns:repeat(2,1fr)}.role-grid{grid-template-columns:repeat(2,1fr)}.process-grid,.dark-split,.split-panel{grid-template-columns:1fr;gap:38px}.catalog-grid{grid-template-columns:1fr}.catalog-head{grid-template-columns:1fr}.catalog-summary{padding:0;border-left:0}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-grid>div:last-child{display:none}.admin-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .container{width:min(100% - 24px,1180px)}.nav-wrap{min-height:62px}.brand-word{font-size:20px}.nav-login{display:none}.nav-actions{gap:8px}.btn-compact{display:none}.main-nav{left:12px;right:12px;top:55px}
  .hero{padding-top:44px}.hero-grid{padding-bottom:38px}.hero h1{font-size:43px}.lead{font-size:17px}.hero-search{margin-top:22px}.hero-search button{padding:0 13px}.hero-actions{display:grid;grid-template-columns:1fr}.hero-actions .btn{width:100%}
  .assessment-panel-head{padding:18px}.assessment-list>a{padding:15px 18px}.assessment-note{padding:14px 18px}.trust-strip{grid-template-columns:1fr 1fr}.trust-strip>div{padding:17px 12px 17px 0}.trust-strip>div+div{padding-left:12px}.trust-strip strong{font-size:20px}.trust-strip .trust-text{grid-column:1/-1;border-left:0;padding-left:0}
  .section{padding:56px 0}.section-head{align-items:flex-start;flex-direction:column;margin-bottom:22px}.section-head h2{font-size:32px}.card-grid,.role-grid{grid-template-columns:1fr}.role-grid{border-bottom:0}.role-grid a{border-right:0}.ai-row{padding:22px;align-items:flex-start;flex-direction:column}.ai-row h2{font-size:28px}
  .certificate-preview{grid-template-columns:1fr;padding:22px;min-height:280px}.certificate-preview-score{grid-column:1}.certificate-preview-bottom{flex-direction:column;gap:5px}.catalog-shell{padding:38px 0 58px}.catalog-head h1{font-size:40px}.catalog-toolbar{grid-template-columns:1fr;padding:10px}.catalog-search{grid-column:auto}.catalog-toolbar .btn{width:100%}.catalog-grid{gap:9px}.test-card{min-height:164px;padding:16px}.test-card-top{margin-bottom:13px}.pagination{grid-template-columns:1fr auto 1fr}
  .page-head,.product-hero,.seo-hero{width:min(100% - 24px,1180px);padding-top:38px}.directory-section,.chip-grid{width:min(100% - 24px,1180px)}.learning-steps{grid-template-columns:1fr}.answer-explanation{padding-left:15px}.quiz-shell{width:min(100% - 24px,900px);margin-top:34px}.question-card h2{font-size:20px}.profile-grid{grid-template-columns:1fr}.profile-hero{align-items:flex-start}.profile-stats{flex-wrap:wrap}.admin-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:8px}
}

/* Defensive layout constraints */
.hero-grid>*{min-width:0}
.catalog-toolbar>*{min-width:0}
.catalog-toolbar input,.catalog-toolbar select{max-width:100%;min-width:0}
@media(max-width:900px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
@media(max-width:640px){.catalog-toolbar{grid-template-columns:minmax(0,1fr)}.catalog-search,.filter-field,.catalog-toolbar .btn{min-width:0;width:100%}}
.static-page{padding:58px 0 78px}.static-page-head{max-width:820px;padding-bottom:30px;border-bottom:1px solid var(--line)}.static-page-head h1{font-size:clamp(38px,5vw,58px);margin-bottom:14px}.static-page-head>p:not(.eyebrow){font-size:17px;color:var(--muted);margin:0;max-width:760px}.static-content{max-width:820px}.static-content>section{padding:30px 0;border-bottom:1px solid var(--line)}.static-content h2{font-size:25px;margin-bottom:12px}.static-content p{color:#4f5863;margin:0 0 12px}.static-links{display:flex;gap:16px;flex-wrap:wrap;margin-top:16px}.static-links a{color:var(--accent);font-size:14px;font-weight:750}