/* =========================================================
   K53TestsOnline design system: "K53 Road Sign"
   Tokens, base, header, footer, components, templates.
   ========================================================= */
@font-face{font-family:'Overpass';font-style:normal;font-weight:400 900;font-display:swap;src:url('../../../uploads/k53/fonts/overpass-normal-latin.woff2') format('woff2');}
@font-face{font-family:'Overpass';font-style:italic;font-weight:600 900;font-display:swap;src:url('../../../uploads/k53/fonts/overpass-italic-latin.woff2') format('woff2');}
@font-face{font-family:'Figtree';font-style:normal;font-weight:400 800;font-display:swap;src:url('../../../uploads/k53/fonts/figtree-normal-latin.woff2') format('woff2');}
@font-face{font-family:'Figtree';font-style:italic;font-weight:400 600;font-display:swap;src:url('../../../uploads/k53/fonts/figtree-italic-latin.woff2') format('woff2');}

:root{
  --bg:#F3F5F1;--surface:#FFFFFF;--ink:#161D19;--muted:#56625B;--line:#DCE2DC;--line-strong:#C3CCC5;
  --accent:#027B5C;--accent-strong:#01654B;--accent-soft:#E0F1EB;
  --asphalt:#18201C;--asphalt-2:#232D28;--brand-green:#027B5C;--brand-navy:#1B3978;--brand-red:#DE1339;
  --red:#C62A1F;--red-soft:#FBEAE8;--amber:#F2B01E;--amber-soft:#FDF4DC;
  --font-display:'Overpass',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-body:'Figtree',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --r-sm:6px;--r-md:10px;--r-lg:16px;--r-pill:999px;
  --wrap:1200px;--gutter:20px;--hd-h:68px;
  --lift:0 14px 28px -18px rgba(1,101,75,.45);
  /* legacy aliases used by older inline styles */
  --k53-blue:var(--accent);--k53-blue-d:var(--accent-strong);--k53-blue-dd:var(--accent-strong);--k53-ink:var(--ink);--k53-slate:var(--ink);--k53-mut:var(--muted);--k53-line:var(--line);--k53-bg:var(--bg);--k53-soft:var(--accent-soft);--k53-green:var(--accent);--k53-green-d:var(--accent-strong);--k53-red:var(--red);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hd-h) + 16px);}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16.5px/1.65 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;}
:where(h1,h2,h3,h4,h5,h6){font-family:var(--font-display);font-weight:800;color:var(--ink);line-height:1.12;letter-spacing:-.012em;margin:0 0 .5em;}
:where(p,ul,ol,dl,figure,blockquote,table){margin:0 0 1.1em;}
:where(img,video){max-width:100%;height:auto;}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px;}
a:hover{color:var(--accent-strong);}
:where(button,input,select,textarea){font:inherit;color:inherit;}
::selection{background:var(--accent);color:#fff;}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px;}
.screen-reader-text{border:0;clip:rect(1px,1px,1px,1px);clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute!important;width:1px;word-wrap:normal!important;}
.k53-skip:focus{clip:auto;clip-path:none;width:auto;height:auto;margin:0;z-index:1000;top:8px;left:8px;padding:10px 16px;background:var(--ink);color:#fff;border-radius:var(--r-md);}
.k53-wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter);}
.k53-narrow{max-width:820px;margin:0 auto;}
.k53-main{display:block;min-height:50vh;}
@media(max-width:600px){:root{--gutter:16px;}body{font-size:16px;}}

/* ---------- Buttons & links ---------- */
.k53-btn,.k53-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 15.5px/1.1 var(--font-body);padding:14px 22px;border-radius:var(--r-md);background:var(--accent);color:#fff;text-decoration:none;border:0;box-shadow:inset 0 -2px 0 rgba(0,0,0,.2);cursor:pointer;transition:background-color .15s,color .15s,box-shadow .15s,transform .08s;white-space:nowrap;}
.k53-btn:hover,.k53-cta:hover{background:var(--accent-strong);color:#fff;}
.k53-btn:active,.k53-cta:active{transform:translateY(1px);box-shadow:none;}
.k53-btn--ghost,.k53-cta.out{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink);}
.k53-btn--ghost:hover,.k53-cta.out:hover{background:var(--ink);color:#fff;}
.k53-btn--light{background:#fff;color:var(--ink);box-shadow:inset 0 -2px 0 rgba(0,0,0,.12);}
.k53-btn--light:hover{background:var(--accent-soft);color:var(--ink);}
.k53-btn--sm{padding:10px 14px;font-size:14px;}
.k53-btn svg{width:18px;height:18px;flex:0 0 18px;}
.k53-btnrow{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.k53-more{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--accent);text-decoration:none;white-space:nowrap;}
.k53-more::after{content:'\2192';transition:transform .15s;}
.k53-more:hover{color:var(--accent-strong);}
.k53-more:hover::after{transform:translateX(3px);}
.k53-chip{display:inline-flex;align-items:center;gap:6px;font:600 13px/1 var(--font-body);padding:7px 12px;border-radius:var(--r-pill);background:var(--accent-soft);color:var(--accent-strong);text-decoration:none;}

/* ---------- Header ---------- */
.k53-hd{position:sticky;top:0;z-index:100;background:rgba(243,245,241,.94);-webkit-backdrop-filter:saturate(1.3) blur(10px);backdrop-filter:saturate(1.3) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s;}
.admin-bar .k53-hd{top:32px;}
@media(max-width:782px){.admin-bar .k53-hd{top:46px;}}
@media(max-width:600px){.admin-bar .k53-hd{top:0;}}
.k53-hd.is-scrolled{border-bottom-color:var(--line);}
.k53-hd-in{display:flex;align-items:center;gap:24px;height:var(--hd-h);}
.k53-logo{display:inline-flex;align-items:center;flex:0 0 auto;line-height:0;text-decoration:none;}
.k53-logo img{display:block;width:auto;height:32px;}
@media(max-width:480px){.k53-logo img{height:28px;}}
.k53-nav{flex:1;display:flex;justify-content:center;}
.k53-nav>ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;}
.k53-nav li{position:relative;margin:0;}
.k53-nav .top{display:inline-flex;align-items:center;gap:6px;font:600 15px/1 var(--font-body);color:var(--ink);text-decoration:none;padding:11px 12px;border-radius:var(--r-md);background:none;border:0;cursor:pointer;}
.k53-nav .top:hover,.k53-nav li:focus-within>.top,.k53-nav li.is-current>.top{background:rgba(22,29,25,.06);color:var(--ink);}
.k53-nav li.is-current>.top{box-shadow:inset 0 -2px 0 var(--accent);border-radius:var(--r-md) var(--r-md) 2px 2px;}
.k53-nav .caret{width:10px;height:10px;opacity:.6;transition:transform .15s;}
.k53-sub{position:absolute;top:calc(100% + 6px);left:-8px;min-width:320px;list-style:none;margin:0;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:0 24px 48px -24px rgba(22,29,25,.35);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .15s,transform .15s,visibility .15s;}
.k53-sub::before{content:'';position:absolute;left:0;right:0;top:-10px;height:10px;}
.k53-nav li:hover>.k53-sub,.k53-nav li:focus-within>.k53-sub{opacity:1;visibility:visible;transform:none;}
.k53-nav li:hover>.top .caret,.k53-nav li:focus-within>.top .caret{transform:rotate(180deg);}
.k53-sub a{display:block;padding:10px 12px;border-radius:var(--r-md);text-decoration:none;color:var(--ink);}
.k53-sub a:hover,.k53-sub a:focus-visible{background:var(--bg);}
.k53-sub a b{display:block;font:600 15px/1.3 var(--font-body);}
.k53-sub a span{display:block;font-size:13.5px;line-height:1.4;color:var(--muted);margin-top:2px;}
.k53-hd-cta{flex:0 0 auto;}
.k53-burger{display:none;align-items:center;gap:8px;margin-left:auto;background:none;border:1.5px solid var(--ink);border-radius:var(--r-md);padding:9px 12px;font:700 14px/1 var(--font-body);color:var(--ink);cursor:pointer;}
.k53-burger i{position:relative;display:block;width:16px;height:2px;background:currentColor;}
.k53-burger i::before,.k53-burger i::after{content:'';position:absolute;left:0;width:16px;height:2px;background:currentColor;transition:transform .15s;}
.k53-burger i::before{top:-5px;}.k53-burger i::after{top:5px;}
.k53-hd.is-open .k53-burger i{background:transparent;}
.k53-hd.is-open .k53-burger i::before{transform:translateY(5px) rotate(45deg);}
.k53-hd.is-open .k53-burger i::after{transform:translateY(-5px) rotate(-45deg);}
@media(max-width:1000px){
  .k53-hd{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--bg);}
  .k53-burger{display:inline-flex;}
  .k53-hd-cta{display:none;}
  .k53-nav{position:fixed;left:0;right:0;top:var(--hd-h);bottom:0;background:var(--bg);display:none;overflow-y:auto;padding:12px var(--gutter) 40px;border-top:1px solid var(--line);}
  .admin-bar .k53-nav{top:calc(var(--hd-h) + 46px);}
  .k53-hd.is-open .k53-nav{display:block;}
  .k53-nav>ul{flex-direction:column;align-items:stretch;gap:0;}
  .k53-nav>ul>li{border-bottom:1px solid var(--line);padding:6px 0;}
  .k53-nav .top{width:100%;justify-content:space-between;font-size:18px;font-family:var(--font-display);font-weight:800;padding:14px 4px;}
  .k53-nav .top:hover,.k53-nav li:focus-within>.top{background:none;}
  .k53-nav li.is-current>.top{box-shadow:none;color:var(--accent);}
  .k53-nav .caret{display:none;}
  .k53-sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:none;padding:0 0 8px;min-width:0;}
  .k53-sub a{padding:9px 4px;}
  .k53-sub a span{display:none;}
  .k53-nav-cta{display:flex!important;margin-top:20px;}
  .k53-nav-cta .k53-btn{width:100%;}
  body.k53-menu-open{overflow:hidden;}
}
.k53-nav-cta{display:none;}

/* ---------- Page header ---------- */
.k53-ph{padding:44px 0 40px;border-bottom:1px solid var(--line);}
.k53-ph h1{font-size:clamp(32px,4.4vw,54px);line-height:1.04;letter-spacing:-.02em;margin:0;max-width:20ch;}
.k53-ph p.sub{font-size:18.5px;line-height:1.55;color:var(--muted);margin:16px 0 0;max-width:58ch;}
.k53-ph .k53-btnrow{margin-top:26px;}
.k53-ph .meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;color:var(--muted);font-size:14.5px;}
.k53-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;color:var(--muted);margin:0 0 16px;}
.k53-crumb a{color:var(--muted);text-decoration:none;}
.k53-crumb a:hover{color:var(--accent);text-decoration:underline;}
.k53-crumb .sep{opacity:.5;}

/* ---------- Sections ---------- */
.k53-s{padding:72px 0;}
.k53-s--tight{padding:44px 0;}
.k53-s--white{background:var(--surface);border-block:1px solid var(--line);}
.k53-s + .k53-s--white,.k53-s--white + .k53-s{margin-top:0;}
.k53-s-hd{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:0 0 30px;}
.k53-s-hd h2{font-size:clamp(27px,3.1vw,38px);line-height:1.08;letter-spacing:-.018em;margin:0;max-width:22ch;}
.k53-s-hd p{color:var(--muted);font-size:17px;margin:10px 0 0;max-width:56ch;}
@media(max-width:600px){.k53-s{padding:48px 0;}.k53-s--tight{padding:32px 0;}.k53-s-hd{flex-direction:column;align-items:flex-start;gap:12px;}}
/* legacy wrappers */
.k53-sec{padding:56px 0;}
.k53-sec h2.k53-h{font-size:clamp(26px,3vw,36px);margin:0 0 10px;}
.k53-sec p.k53-sub{color:var(--muted);max-width:60ch;margin:0 0 28px;}
.k53-eyebrow{display:none;}

/* ---------- Home hero ---------- */
.k53-hero2{padding:56px 0 72px;overflow:hidden;}
.k53-hero2-in{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;}
.k53-hero2 h1{font-size:clamp(40px,5.6vw,70px);line-height:1.0;letter-spacing:-.03em;margin:0;}
.k53-hero2 h1 em{font-style:italic;color:var(--accent);padding-right:.04em;}
.k53-hero2 .sub{font-size:19px;line-height:1.55;color:var(--muted);margin:22px 0 30px;max-width:44ch;}
.k53-hero2-vis{position:relative;padding:34px 0 34px 40px;}
.k53-hero2-vis::before{content:'';position:absolute;top:0;bottom:0;left:0;right:-200px;background:var(--asphalt);border-radius:var(--r-lg) 0 0 var(--r-lg);}
.k53-hero2-vis::after{content:'';position:absolute;top:0;bottom:0;left:18px;width:5px;background:repeating-linear-gradient(180deg,rgba(255,255,255,.55) 0 26px,transparent 26px 48px);}
.k53-hero2-vis .k53-run{position:relative;z-index:1;margin-left:-72px;}
@media(max-width:960px){
  .k53-hero2{padding:36px 0 48px;}
  .k53-hero2-in{grid-template-columns:1fr;gap:36px;}
  .k53-hero2-vis{padding:24px 0 24px 32px;}
  .k53-hero2-vis::before{right:calc(var(--gutter) * -1);}
  .k53-hero2-vis .k53-run{margin-left:0;}
}
@media(max-width:600px){.k53-hero2 h1{font-size:38px;}.k53-hero2 .sub{font-size:17px;margin:16px 0 24px;}.k53-hero2-vis{padding:18px 0 18px 26px;}.k53-hero2-vis::after{left:10px;width:4px;}}

/* ---------- Figures strip ---------- */
.k53-figs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--surface);border-block:1px solid var(--line);}
.k53-fig{padding:26px var(--gutter) 24px;border-left:1px solid var(--line);}
.k53-fig:first-child{border-left:0;}
.k53-fig b{display:block;font:800 clamp(30px,3.4vw,44px)/1 var(--font-display);letter-spacing:-.02em;color:var(--ink);}
.k53-fig span{display:block;margin-top:8px;color:var(--muted);font-size:15px;}
.k53-figs-wrap{background:var(--surface);border-block:1px solid var(--line);}
.k53-figs-wrap .k53-figs{border:0;background:none;}
@media(max-width:760px){.k53-figs{grid-template-columns:repeat(2,1fr);}.k53-fig:nth-child(3){border-left:0;}.k53-fig:nth-child(n+3){border-top:1px solid var(--line);}}

/* stats shortcode (legacy name) */
.k53-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);}
.k53-stat{padding:22px;border-left:1px solid var(--line);}
.k53-stat:first-child{border-left:0;}
.k53-stat b{display:block;font:800 36px/1 var(--font-display);color:var(--ink);}
.k53-stat span{display:block;margin-top:8px;color:var(--muted);font-size:14.5px;}
@media(max-width:760px){.k53-stats{grid-template-columns:1fr 1fr;}.k53-stat:nth-child(3){border-left:0;}.k53-stat:nth-child(n+3){border-top:1px solid var(--line);}}

/* ---------- Test picker ---------- */
.k53-picker{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:20px;align-items:stretch;}
.k53-feature{position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:28px;padding:34px;border-radius:var(--r-lg);background:var(--accent-soft);color:var(--ink);text-decoration:none;overflow:hidden;min-height:340px;}
.k53-feature h3{font-size:clamp(28px,3vw,40px);line-height:1.04;margin:14px 0 12px;letter-spacing:-.02em;}
.k53-feature p{color:var(--ink);opacity:.8;margin:0;max-width:40ch;}
.k53-feature .split{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.k53-feature .split span{background:var(--surface);border-radius:var(--r-pill);padding:7px 12px;font-size:13.5px;font-weight:600;}
.k53-feature .k53-btn{align-self:flex-start;}
.k53-feature .big{position:absolute;right:-6px;bottom:-34px;font:900 190px/1 var(--font-display);letter-spacing:-.05em;color:rgba(2,123,92,.09);pointer-events:none;}
.k53-rows{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;}
.k53-rows li{margin:0;border-top:1px solid var(--line);}
.k53-rows li:first-child{border-top:0;}
.k53-row{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:16px;align-items:center;padding:16px 20px;text-decoration:none;color:var(--ink);transition:background-color .15s;}
a.k53-row:hover{background:var(--bg);color:var(--ink);}
.k53-row .ic{width:52px;height:52px;border-radius:var(--r-md);background:var(--bg);display:grid;place-items:center;overflow:hidden;}
.k53-row .ic img{max-width:40px;max-height:40px;width:auto;height:auto;object-fit:contain;}
.k53-row .ic svg{width:28px;height:28px;}
.k53-row b{display:block;font:700 17px/1.25 var(--font-display);}
.k53-row small{display:block;color:var(--muted);font-size:14px;line-height:1.45;margin-top:3px;}
.k53-row .n{font:700 14px/1 var(--font-body);color:var(--muted);white-space:nowrap;display:flex;align-items:center;gap:10px;}
.k53-row .n::after{content:'\2192';color:var(--accent);font-size:18px;transition:transform .15s;}
a.k53-row:hover .n::after{transform:translateX(3px);}
@media(max-width:900px){.k53-picker{grid-template-columns:1fr;}.k53-feature{min-height:0;}}
@media(max-width:520px){.k53-row{grid-template-columns:44px minmax(0,1fr);padding:14px 16px;}.k53-row .ic{width:44px;height:44px;}.k53-row .n{grid-column:2;}}

/* ---------- Exam scoreboard ---------- */
.k53-board{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;align-items:start;}
.k53-board-intro h2{font-size:clamp(27px,3.1vw,38px);line-height:1.08;margin:0 0 14px;}
.k53-board-intro p{color:var(--muted);font-size:17px;}
.k53-board-rows{border-top:2px solid var(--ink);}
.k53-brow{display:grid;grid-template-columns:minmax(0,1fr) 110px;gap:8px 24px;padding:22px 0;border-bottom:1px solid var(--line);align-items:center;}
.k53-brow h3{font-size:20px;margin:0;}
.k53-brow .q{font:800 34px/1 var(--font-display);text-align:right;grid-row:span 2;}
.k53-brow .q small{display:block;font:600 13px/1.2 var(--font-body);color:var(--muted);margin-top:6px;}
.k53-bar{position:relative;height:10px;border-radius:var(--r-pill);background:var(--line);overflow:visible;}
.k53-bar>i{position:absolute;inset:0 auto 0 0;border-radius:var(--r-pill);background:var(--accent);}
.k53-bar>em{position:absolute;top:-5px;bottom:-5px;width:2px;background:var(--ink);font-style:normal;}
.k53-brow .lbl{font-size:14px;color:var(--muted);}
.k53-brow .lbl b{color:var(--ink);}
@media(max-width:900px){.k53-board{grid-template-columns:1fr;gap:24px;}}

/* ---------- Sign strip / gallery ---------- */
.k53-signstrip{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:12px;}
.k53-signstrip a{position:relative;display:block;aspect-ratio:1;min-width:0;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:14px;transition:transform .15s,box-shadow .15s,border-color .15s;}
.k53-signstrip a:hover{transform:translateY(-2px);box-shadow:var(--lift);border-color:var(--line-strong);}
.k53-signstrip img{position:absolute;inset:14px;width:calc(100% - 28px);height:calc(100% - 28px);object-fit:contain;display:block;}
@media(max-width:900px){.k53-signstrip{grid-template-columns:repeat(4,minmax(0,1fr));}}
@media(max-width:480px){.k53-signstrip{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;}.k53-signstrip a{padding:10px;}}
.k53-signs{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:14px;margin:8px 0 24px;}
.k53-sign{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 14px 14px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px;}
.k53-sign img{height:92px;width:auto;max-width:100%;object-fit:contain;}
.k53-sign span{display:block;font-size:13.5px;line-height:1.4;color:var(--ink);}
.k53-sign[hidden]{display:none;}
.k53-filter{position:sticky;top:calc(var(--hd-h) + 8px);z-index:5;display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:var(--bg);padding:10px 0 14px;margin-bottom:6px;}
.admin-bar .k53-filter{top:calc(var(--hd-h) + 40px);}
.k53-filter input{flex:1 1 280px;max-width:460px;padding:13px 16px 13px 44px;border:1.5px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2356625B' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 14px 50%/18px;font-size:16px;}
.k53-filter input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}
.k53-filter output{font-size:14px;color:var(--muted);}
@media(max-width:480px){.k53-signs{grid-template-columns:repeat(2,1fr);gap:10px;}.k53-sign img{height:72px;}}

/* ---------- Study guides ---------- */
.k53-guides{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.k53-guides h3{font-size:22px;margin:0 0 4px;}
.k53-guides .gsub{color:var(--muted);font-size:15px;margin:0 0 16px;}
.k53-guides>div{min-width:0;}
.k53-row .ic.num{font:800 18px/1 var(--font-display);color:var(--accent-strong);background:var(--accent-soft);}
@media(max-width:860px){.k53-guides{grid-template-columns:1fr;gap:36px;}}

/* ---------- Articles ---------- */
.k53-arts{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px;align-items:stretch;}
.k53-art-feat{display:flex;flex-direction:column;justify-content:flex-end;gap:14px;min-height:320px;padding:32px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;position:relative;overflow:hidden;transition:box-shadow .15s,border-color .15s;}
.k53-art-feat::before{content:'';position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--accent);}
.k53-art-feat .k53-chip{align-self:flex-start;margin-bottom:auto;}
.k53-art-feat h3{font-size:clamp(24px,2.6vw,34px);line-height:1.08;letter-spacing:-.015em;margin:0;max-width:22ch;}
.k53-art-feat p{color:var(--muted);margin:0;max-width:56ch;}
.k53-art-feat:hover{color:var(--ink);border-color:var(--line-strong);box-shadow:var(--lift);}
.k53-art-feat:hover h3{color:var(--accent-strong);}
.k53-art-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;}
.k53-art-list li{margin:0;border-top:1px solid var(--line);}
.k53-art-list li:first-child{border-top:0;}
.k53-art-list a{display:block;padding:18px 0;text-decoration:none;color:var(--ink);}
.k53-art-list a b{display:block;font:700 18px/1.3 var(--font-display);}
.k53-art-list a:hover b{color:var(--accent);}
.k53-art-list a span{display:block;color:var(--muted);font-size:14.5px;margin-top:6px;line-height:1.5;}
.k53-art-list a i{font-style:normal;font-size:13px;color:var(--muted);font-weight:600;display:block;margin-top:8px;}
.k53-arts.is-full{grid-template-columns:1fr;}
.k53-arts.is-full .k53-art-list{display:grid;grid-template-columns:1fr 1fr;column-gap:40px;}
.k53-arts.is-full .k53-art-list li:nth-child(2){border-top:0;}
@media(max-width:860px){.k53-arts{grid-template-columns:1fr;}.k53-arts.is-full .k53-art-list{grid-template-columns:1fr;}.k53-arts.is-full .k53-art-list li:nth-child(2){border-top:1px solid var(--line);}.k53-art-feat{min-height:260px;}}

/* ---------- Downloads ---------- */
.k53-dlgroup + .k53-dlgroup{margin-top:44px;}
.k53-dlgroup h2{font-size:24px;margin:0 0 14px;}
.k53-dl{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;}
.k53-dl li{display:grid;grid-template-columns:46px minmax(0,1fr) auto;gap:16px;align-items:center;padding:14px 20px;border-top:1px solid var(--line);margin:0;}
.k53-dl li:first-child{border-top:0;}
.k53-dl .pdf{width:46px;height:54px;border-radius:var(--r-sm);background:var(--bg);border:1px solid var(--line);display:grid;place-items:end center;padding-bottom:8px;font:800 11px/1 var(--font-display);letter-spacing:.06em;color:var(--muted);position:relative;}
.k53-dl .pdf::before{content:'';position:absolute;top:-1px;right:-1px;width:14px;height:14px;background:linear-gradient(225deg,var(--bg) 50%,var(--line) 50%);border-radius:0 var(--r-sm) 0 0;}
.k53-dl .m b{display:block;font:700 16.5px/1.3 var(--font-display);color:var(--ink);}
.k53-dl .m span{color:var(--muted);font-size:14px;}
@media(max-width:520px){.k53-dl li{grid-template-columns:40px minmax(0,1fr);padding:14px 16px;}.k53-dl .pdf{width:40px;height:48px;}.k53-dl .k53-btn{grid-column:1 / -1;}}

/* ---------- FAQ ---------- */
.k53-faqwrap{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);gap:56px;align-items:start;}
.k53-faqwrap h2{font-size:clamp(27px,3.1vw,38px);line-height:1.08;margin:0 0 12px;}
.k53-faqwrap .intro p{color:var(--muted);}
.k53-faq{display:block;max-width:none;border-top:2px solid var(--ink);}
.k53-faq details{border-bottom:1px solid var(--line);padding:0;background:none;border-radius:0;box-shadow:none;}
.k53-faq summary{cursor:pointer;list-style:none;position:relative;padding:20px 44px 20px 0;font:700 18px/1.35 var(--font-display);color:var(--ink);}
.k53-faq summary::-webkit-details-marker{display:none;}
.k53-faq summary::after{content:'';position:absolute;right:6px;top:50%;width:12px;height:12px;margin-top:-9px;border-right:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);transform:rotate(45deg);transition:transform .15s;}
.k53-faq details[open] summary::after{transform:rotate(225deg);margin-top:-3px;}
.k53-faq details p{margin:0 0 22px;color:var(--muted);max-width:62ch;}
@media(max-width:900px){.k53-faqwrap{grid-template-columns:1fr;gap:20px;}}

/* ---------- Dark band ---------- */
.k53-band2{background:var(--asphalt);color:#fff;position:relative;overflow:hidden;}
.k53-band2::before{content:'';position:absolute;left:0;right:0;top:50%;height:6px;margin-top:-3px;background:repeating-linear-gradient(90deg,rgba(255,255,255,.14) 0 44px,transparent 44px 80px);}
.k53-band2-in{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:64px var(--gutter);}
.k53-band2 h2{color:#fff;font-size:clamp(28px,3.4vw,44px);line-height:1.05;margin:0 0 10px;max-width:18ch;background:var(--asphalt);padding-right:12px;}
.k53-band2 p{color:#C9D3CC;margin:0;max-width:48ch;background:var(--asphalt);}
.k53-band2 .k53-btn{flex:0 0 auto;}
@media(max-width:760px){.k53-band2-in{flex-direction:column;align-items:flex-start;padding:48px var(--gutter);}.k53-band2::before{display:none;}}
/* legacy band */
.k53-band{background:var(--asphalt);border-radius:var(--r-lg);padding:40px;color:#fff;}
.k53-band h2{color:#fff;font-size:28px;margin:0 0 10px;}
.k53-band p{color:#C9D3CC;margin:0 0 22px;}

/* ---------- Cards (legacy grid) ---------- */
.k53-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;}
.k53-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;text-decoration:none;color:var(--ink);position:relative;transition:transform .15s,box-shadow .15s,border-color .15s;}
a.k53-card:hover{transform:translateY(-2px);box-shadow:var(--lift);border-color:var(--line-strong);color:var(--ink);}
.k53-card h3{font-size:19px;margin:0 0 6px;}
.k53-card p{color:var(--muted);font-size:15px;margin:0;}
.k53-card .ic,.k53-card .cnt{display:none;}
.k53-card .go{display:inline-block;margin-top:14px;color:var(--accent);font-weight:700;font-size:14.5px;}

/* ---------- Prose (articles, chapters, legal) ---------- */
.k53-prose{font-size:17.5px;line-height:1.7;color:var(--ink);max-width:70ch;overflow-wrap:break-word;}
.k53-prose>*:first-child{margin-top:0;}
.k53-prose h2{font-size:clamp(24px,2.4vw,30px);line-height:1.15;margin:1.9em 0 .55em;}
.k53-prose h3{font-size:21px;line-height:1.25;margin:1.6em 0 .5em;}
.k53-prose h4{font-size:18px;margin:1.4em 0 .4em;}
.k53-prose p,.k53-prose ul,.k53-prose ol{margin:0 0 1.15em;}
.k53-prose ul,.k53-prose ol{padding-left:1.3em;}
.k53-prose li{margin:.35em 0;}
.k53-prose li::marker{color:var(--accent);font-weight:700;}
.k53-prose a{color:var(--accent);text-decoration:underline;}
.k53-prose strong{font-weight:700;}
.k53-prose img{border-radius:var(--r-md);height:auto;}
.k53-prose figure{margin:1.6em 0;}
.k53-prose figcaption{font-size:14px;color:var(--muted);margin-top:8px;}
.k53-prose blockquote{margin:1.5em 0;padding:4px 0 4px 20px;border-left:4px solid var(--accent);color:var(--ink);font-size:18.5px;}
.k53-prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.k53-prose table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:15.5px;line-height:1.5;margin:1.5em 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);}
.k53-prose th,.k53-prose td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;}
.k53-prose th{background:var(--bg);font-weight:700;font-family:var(--font-display);}
.k53-prose tr:last-child td{border-bottom:0;}
.k53-prose [style*="width"]{max-width:100%!important;}
.k53-prose code{font-size:.9em;background:var(--bg);padding:2px 6px;border-radius:4px;}
.k53-prose .k53-share{margin-top:40px;}
@media(max-width:600px){.k53-prose{font-size:16.5px;}}
/* fact tables (cheat sheets) */
.k53-facts{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:16px;margin:16px 0 32px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);}
.k53-facts th{background:var(--ink);color:#fff;text-align:left;padding:13px 16px;font-family:var(--font-display);font-weight:700;}
.k53-facts td{padding:13px 16px;border-top:1px solid var(--line);vertical-align:top;}
.k53-facts td:first-child{font-weight:600;width:38%;}
.k53-facts tbody,.k53-facts tr{width:100%;}

/* ---------- Layouts: article / chapter ---------- */
.k53-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:64px;align-items:start;padding:48px 0 80px;}
.k53-layout--toc{grid-template-columns:280px minmax(0,1fr);gap:56px;}
.k53-rail{position:sticky;top:calc(var(--hd-h) + 24px);display:flex;flex-direction:column;gap:20px;}
.admin-bar .k53-rail{top:calc(var(--hd-h) + 56px);}
.k53-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;}
.k53-panel h3{font-size:18px;margin:0 0 8px;}
.k53-panel p{color:var(--muted);font-size:15px;margin:0 0 16px;}
.k53-panel--accent{background:var(--accent-soft);border-color:transparent;}
.k53-panel ul{list-style:none;margin:0;padding:0;}
.k53-panel li{margin:0;border-top:1px solid var(--line);}
.k53-panel li:first-child{border-top:0;}
.k53-panel li a{display:block;padding:11px 0;color:var(--ink);text-decoration:none;font-weight:600;font-size:15px;line-height:1.35;}
.k53-panel li a:hover{color:var(--accent);}
.k53-toc{max-height:calc(100vh - var(--hd-h) - 60px);overflow-y:auto;padding:18px 10px 18px 18px;}
.k53-toc h3{font-size:16px;margin:0 0 4px;padding-right:8px;}
.k53-toc h3 a{color:var(--ink);text-decoration:none;}
.k53-toc .cnt{font-size:13px;color:var(--muted);margin:0 0 10px;}
.k53-toc ol{list-style:none;margin:0;padding:0;counter-reset:ch;}
.k53-toc li{margin:0;counter-increment:ch;}
.k53-toc li a{display:grid;grid-template-columns:28px 1fr;gap:4px;padding:7px 8px 7px 0;font-size:14px;line-height:1.35;color:var(--ink);text-decoration:none;border-radius:var(--r-sm);}
.k53-toc li a::before{content:counter(ch);font:700 12.5px/1.6 var(--font-display);color:var(--muted);text-align:right;padding-right:6px;}
.k53-toc li a:hover{color:var(--accent);}
.k53-toc li.is-current a{background:var(--accent-soft);color:var(--accent-strong);font-weight:700;}
.k53-toc li.is-current a::before{color:var(--accent-strong);}
.k53-tocm{display:none;margin:0 0 24px;}
.k53-tocm summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px;font:700 16px/1.3 var(--font-display);padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);}
.k53-tocm summary::-webkit-details-marker{display:none;}
.k53-tocm summary::after{content:'';width:9px;height:9px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg);margin-top:-4px;}
.k53-tocm[open] summary::after{transform:rotate(225deg);margin-top:4px;}
.k53-tocm .k53-toc{max-height:none;margin-top:8px;}
@media(max-width:1000px){
  .k53-layout,.k53-layout--toc{grid-template-columns:1fr;gap:40px;padding:32px 0 56px;}
  .k53-rail{position:static;}
  .k53-layout--toc>.k53-rail{display:none;}
  .k53-tocm{display:block;}
}
.k53-pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:48px;max-width:70ch;}
.k53-pn a{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s;}
.k53-pn a:hover{border-color:var(--line-strong);box-shadow:var(--lift);}
.k53-pn small{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px;}
.k53-pn b{font:700 16.5px/1.3 var(--font-display);}
.k53-pn .next{text-align:right;grid-column:2;}
@media(max-width:600px){.k53-pn{grid-template-columns:1fr;}.k53-pn .next{grid-column:1;}}

/* chapter list on book landing */
.k53-chapters{list-style:none;margin:0;padding:0;counter-reset:ch;columns:2;column-gap:40px;}
.k53-chapters li{counter-increment:ch;break-inside:avoid;margin:0;border-top:1px solid var(--line);}
.k53-chapters a{display:grid;grid-template-columns:40px 1fr;align-items:baseline;gap:6px;padding:14px 0;color:var(--ink);text-decoration:none;font-weight:600;line-height:1.35;}
.k53-chapters a::before{content:counter(ch,decimal-leading-zero);font:800 15px/1.4 var(--font-display);color:var(--accent);}
.k53-chapters a:hover{color:var(--accent);}
@media(max-width:760px){.k53-chapters{columns:1;}}

/* related questions */
.k53-related{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;}
.k53-related li{margin:0;border-top:1px solid var(--line);}
.k53-related li:first-child{border-top:0;}
.k53-related li a{display:block;padding:14px 18px;text-decoration:none;color:var(--ink);font-size:15.5px;}
.k53-related li a:hover{background:var(--bg);color:var(--accent);}

/* ---------- Share ---------- */
.k53-share{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:36px 0 0;}
.k53-share-label{font-weight:700;font-size:14px;color:var(--muted);margin-right:4px;}
.k53-sh{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border-radius:var(--r-pill);font:600 14px/1 var(--font-body);text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);cursor:pointer;transition:border-color .15s,background-color .15s;}
.k53-sh:hover{border-color:var(--ink);color:var(--ink);}
.k53-sh svg{width:16px;height:16px;fill:currentColor;flex:0 0 16px;}
.k53-sh.done{background:var(--accent);border-color:var(--accent);color:#fff;}

/* ---------- Footer ---------- */
.k53-ft{background:var(--asphalt);color:#C9D3CC;margin-top:0;position:relative;}
.k53-ft::before{content:'';display:block;height:6px;background:repeating-linear-gradient(90deg,rgba(255,255,255,.22) 0 44px,transparent 44px 80px);}
.k53-ft-in{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:40px;padding:64px var(--gutter) 48px;}
.k53-ft .k53-logo img{height:40px;}
.k53-ft .about{margin:16px 0 22px;font-size:15px;line-height:1.6;max-width:38ch;}
.k53-ft h4{color:#fff;font:800 15px/1.2 var(--font-display);margin:6px 0 14px;letter-spacing:.01em;}
.k53-ft ul{list-style:none;margin:0;padding:0;}
.k53-ft li{margin:0 0 10px;}
.k53-ft a{color:#E6ECE7;text-decoration:none;font-size:15px;}
.k53-ft a:hover{color:#fff;text-decoration:underline;}
.k53-ft .k53-btn{color:#fff;}
.k53-ft-legal{border-top:1px solid rgba(255,255,255,.1);}
.k53-ft-legal .k53-wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;padding-bottom:24px;font-size:13.5px;color:#9FAAA3;}
@media(max-width:900px){.k53-ft-in{grid-template-columns:1fr 1fr;}.k53-ft-in>.brand{grid-column:1 / -1;}}
@media(max-width:480px){.k53-ft-in{gap:28px;padding-top:48px;}}

/* ---------- Results ---------- */
.k53-res{max-width:760px;margin:0 auto;padding:48px 0 80px;}
.k53-res-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:36px;}
.k53-res-top{display:flex;align-items:center;gap:28px;flex-wrap:wrap;}
.k53-res-score{font:900 clamp(56px,9vw,88px)/.9 var(--font-display);letter-spacing:-.04em;}
.k53-res-score small{font-size:.4em;color:var(--muted);letter-spacing:0;}
.k53-res-verdict{display:inline-flex;font:800 14px/1 var(--font-display);letter-spacing:.06em;text-transform:uppercase;padding:9px 14px;border-radius:var(--r-pill);}
.k53-res-verdict.pass{background:var(--accent);color:#fff;}
.k53-res-verdict.fail{background:var(--red);color:#fff;}
.k53-res-verdict.none{background:var(--bg);color:var(--muted);}
.k53-res h1{font-size:clamp(26px,3vw,34px);margin:0 0 6px;}
.k53-res-msg{color:var(--muted);margin:6px 0 0;}
.k53-res-break{margin-top:30px;border-top:2px solid var(--ink);}
.k53-res-break[hidden]{display:none;}
.k53-res .k53-btnrow{margin-top:30px;}
.k53-res-more{margin-top:40px;}
.k53-res-more h2{font-size:22px;margin:0 0 14px;}

/* ---------- 404 / search / archive ---------- */
.k53-empty{padding:80px 0;}
.k53-empty h1{font-size:clamp(36px,5vw,60px);margin:0 0 12px;}
.k53-empty p{color:var(--muted);font-size:18px;max-width:52ch;}
.k53-search{display:flex;gap:10px;max-width:520px;margin:24px 0;}
.k53-search input{flex:1;padding:13px 16px;border:1.5px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface);font-size:16px;}

/* ---------- Elementor / theme leftovers ---------- */
.site-header,.site-footer,#site-header,#site-footer{display:none!important;}
.page-header .entry-title{display:none;}
.elementor-widget-container .k53-sec{padding:56px 0;}



/* article sample questions */
.k53-prose .k53-sample{margin:1.8em 0;padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);}
.k53-prose .k53-sample-label{font:800 12.5px/1.3 var(--font-display);letter-spacing:.06em;text-transform:uppercase;color:var(--accent-strong);margin:0 0 12px;}
.k53-prose .k53-figure{margin:0 0 16px;background:var(--bg);border-radius:var(--r-md);padding:18px;display:grid;place-items:center;}
.k53-prose .k53-figure img{max-height:200px;width:auto;object-fit:contain;border-radius:0;}
.k53-prose .k53-figure figcaption{text-align:center;}
.k53-prose .k53-figure--wide{background:var(--surface);border:1px solid var(--line);}
.k53-prose .k53-figure--wide img{max-height:none;width:100%;max-width:560px;}
.k53-prose .k53-alpha{list-style:upper-alpha;padding-left:1.6em;margin:0 0 14px;}
.k53-prose .k53-alpha li{padding:6px 10px;margin:4px 0 4px -10px;border-radius:var(--r-sm);}
.k53-prose .k53-alpha li::marker{color:var(--muted);}
.k53-prose .k53-alpha li.is-correct{background:var(--accent-soft);box-shadow:inset 0 0 0 1px rgba(2,123,92,.25);font-weight:600;}
.k53-prose .k53-answer{margin:0;padding:12px 14px;background:var(--accent-soft);border-radius:var(--r-md);font-size:15.5px;color:var(--ink);}
.k53-prose .k53-sample>p:not([class]){font-weight:600;}
/* legacy inline sizes inside imported guide content */
.k53-prose table{display:table;width:100%!important;height:auto!important;}
.k53-prose tr,.k53-prose td,.k53-prose th,.k53-prose tbody{height:auto!important;}
.k53-prose td>p:last-child,.k53-prose th>p:last-child{margin-bottom:0;}
.k53-prose img{height:auto!important;}
@media(max-width:700px){.k53-prose table{display:block;overflow-x:auto;}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important;}}
@media print{.k53-hd,.k53-ft,.k53-share,.k53-rail,.k53-tocm,.k53-pn,.k53-band2{display:none!important;}body{background:#fff;}.k53-layout{display:block;padding:0;}}

@media(max-width:480px){.k53-signstrip img{inset:10px;width:calc(100% - 20px);height:calc(100% - 20px);}}