/* ============================================================
   CSSmatic — shared design system (used by every page)
   ============================================================ */
:root{
  --paper:#F5F7F8; --surface:#FFFFFF;
  --ink:#20242A; --ink-soft:#57595B; --ink-faint:#8A8D90;
  --line:#E1E5E8; --line-soft:#EDF0F2;
  --brand:#5A8AB9; --brand-dark:#3E6787; --brand-tint:#EAF1F6;
  --editor-bg:#182430; --editor-bg-soft:#20303D; --editor-line:#324656;
  --mint:#2FAF71; --mint-bg:#E4F5EC; --mint-text:#1B7A50;
  --amber:#E0982D; --amber-bg:#FCEFDC; --amber-text:#93590F;
  --coral:#E0594A; --coral-bg:#FBE7E4; --coral-text:#AE392D;
  --radius-sm:8px; --radius-md:14px; --radius-lg:22px;
  --shadow-card:0 1px 2px rgba(32,36,42,.04),0 10px 24px -14px rgba(32,36,42,.22);
  --font-display:'Space Grotesk','Segoe UI',sans-serif;
  --font-body:'Inter','Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
a{color:var(--brand-dark);text-decoration:none}
a:hover{text-decoration:underline}
ul{margin:0;padding:0}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;letter-spacing:-.01em;margin:0}
p{margin:0}
:focus-visible{outline:2.5px solid var(--brand);outline-offset:3px;border-radius:4px}
.wrap{max-width:1220px;margin:0 auto;padding:0 32px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;font-weight:500;color:var(--brand-dark)}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--brand)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:999px;font-size:14px;font-weight:600;white-space:nowrap;text-decoration:none !important;transition:background .12s ease,box-shadow .12s ease,border-color .12s ease}
.btn--primary{background:var(--ink);color:#fff}
.btn--primary:hover{background:var(--brand-dark)}
.btn--brand{background:var(--brand);color:#fff}
.btn--brand:hover{background:var(--brand-dark)}
.btn--ghost{background:transparent;border:1.5px solid var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand-dark)}
.btn--sm{padding:7px 13px;font-size:13px}

.level-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:999px;font-size:11px;font-weight:600;font-family:var(--font-mono)}
.level-badge .dot{width:6px;height:6px;border-radius:50%}
.level-badge--beginner{background:var(--mint-bg);color:var(--mint-text)}.level-badge--beginner .dot{background:var(--mint)}
.level-badge--intermediate{background:var(--amber-bg);color:var(--amber-text)}.level-badge--intermediate .dot{background:var(--amber)}
.level-badge--advanced{background:var(--coral-bg);color:var(--coral-text)}.level-badge--advanced .dot{background:var(--coral)}
.time-pill{font-family:var(--font-mono);font-size:11px;color:var(--ink-faint);white-space:nowrap}

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(245,247,248,.94);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:22px;height:70px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand img,.brand svg{height:25px;width:auto}
.primary-nav{display:flex;align-items:center;gap:4px;flex:1}
.nav-item{position:relative}
.nav-trigger{display:flex;align-items:center;gap:6px;padding:10px 14px;border-radius:var(--radius-sm);font-size:14.5px;font-weight:600;color:var(--ink)}
.nav-trigger:hover,.nav-trigger[aria-expanded="true"]{background:var(--brand-tint);color:var(--brand-dark)}
.nav-trigger .chev{width:9px;height:9px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg);margin-top:-3px;transition:transform .2s}
.nav-trigger[aria-expanded="true"] .chev{transform:rotate(225deg);margin-top:2px}
.nav-link{padding:10px 14px;border-radius:var(--radius-sm);font-size:14.5px;font-weight:500;color:var(--ink);text-decoration:none !important}
.nav-link:hover{background:var(--brand-tint);color:var(--brand-dark)}

/* coddy-style accordion dropdowns */
.dropdown-panel{position:absolute;top:calc(100% + 10px);left:0;width:340px;max-height:70vh;overflow-y:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:0 24px 48px -20px rgba(32,36,42,.32);padding:12px;opacity:0;visibility:hidden;transform:translateY(4px);transition:opacity .15s,transform .15s;z-index:60}
.dropdown-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-head{display:flex;align-items:center;justify-content:space-between;padding:8px 10px 12px;border-bottom:1px solid var(--line-soft);margin-bottom:8px}
.dropdown-head strong{font-family:var(--font-display);font-size:14px}
.dropdown-head span{font-family:var(--font-mono);font-size:11px;color:var(--ink-faint)}
.acc{border-radius:10px;overflow:hidden}
.acc summary{list-style:none;display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;cursor:pointer;font-size:13.5px;font-weight:600}
.acc summary::-webkit-details-marker{display:none}
.acc summary:hover{background:var(--paper)}
.acc summary .acc-chev{margin-left:auto;width:8px;height:8px;border-right:1.6px solid var(--ink-faint);border-bottom:1.6px solid var(--ink-faint);transform:rotate(-45deg);transition:transform .18s;flex-shrink:0}
.acc[open] summary .acc-chev{transform:rotate(45deg)}
.acc summary .mod-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.acc summary .mod-time{margin-left:auto;margin-right:10px;font-family:var(--font-mono);font-size:11px;font-weight:400;color:var(--ink-faint)}
.acc ul{list-style:none;padding:2px 0 8px 28px}
.acc ul a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:6.5px 10px 6.5px 0;font-size:13px;color:var(--ink-soft);border-radius:8px;text-decoration:none !important}
.acc ul a:hover{color:var(--brand-dark)}
.acc ul a.is-current{color:var(--brand-dark);font-weight:600}
.dot--beginner{background:var(--mint)}.dot--intermediate{background:var(--amber)}.dot--advanced{background:var(--coral)}.dot--gen{background:var(--brand)}

.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hamburger{display:none;width:38px;height:38px;border-radius:10px;align-items:center;justify-content:center;color:var(--ink-soft)}
.hamburger:hover{background:var(--brand-tint)}

/* ============ SEARCH ============ */
.search-wrap{position:relative;width:300px}
.search-box{display:flex;align-items:center;gap:9px;background:var(--surface);border:1.5px solid var(--line);border-radius:12px;padding:0 12px}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-tint)}
.search-box svg{width:16px;height:16px;color:var(--ink-faint);flex-shrink:0}
.search-box input{flex:1;border:none;background:none;font-size:14px;padding:9px 0;color:var(--ink);min-width:0}
.search-box input:focus{outline:none}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 24px 48px -20px rgba(32,36,42,.32);padding:8px;max-height:380px;overflow-y:auto;z-index:70;display:none}
.search-results.is-open{display:block}
.search-results a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;text-decoration:none !important}
.search-results a:hover,.search-results a.is-active{background:var(--brand-tint)}
.sr-type{font-family:var(--font-mono);font-size:10px;padding:3px 7px;border-radius:6px;flex-shrink:0}
.sr-type--lesson{background:var(--mint-bg);color:var(--mint-text)}
.sr-type--generator{background:var(--brand-tint);color:var(--brand-dark)}
.sr-title{font-size:13.5px;font-weight:600;color:var(--ink)}
.sr-module{font-size:11.5px;color:var(--ink-faint)}
.search-empty{padding:14px;text-align:center;font-size:13px;color:var(--ink-faint)}

/* ============ PAGE LAYOUT ============ */
.page-layout{display:grid;grid-template-columns:288px 1fr;gap:40px;align-items:start;padding:36px 0 70px}
.sidebar{position:sticky;top:88px;max-height:calc(100vh - 108px);overflow-y:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:14px;scrollbar-width:thin}
.sidebar-title{display:flex;align-items:center;justify-content:space-between;padding:6px 10px 12px;border-bottom:1px solid var(--line-soft);margin-bottom:8px}
.sidebar-title strong{font-family:var(--font-display);font-size:14px}
.sidebar-title span{font-family:var(--font-mono);font-size:11px;color:var(--ink-faint)}
.sidebar .acc ul a.is-current{background:var(--brand-tint);padding-left:10px;margin-right:6px}

.content{min-width:0}
.breadcrumbs{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);margin-bottom:16px}
.breadcrumbs a{color:var(--ink-faint)}
.breadcrumbs a:hover{color:var(--brand-dark)}
.page-head{margin-bottom:28px}
.page-head h1{font-size:clamp(28px,3.4vw,40px);margin:10px 0 12px}
.page-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.lede{font-size:17px;color:var(--ink-soft);max-width:680px;margin-top:14px}

.content h2{font-size:24px;margin:44px 0 14px;padding-top:8px}
.content h3{font-size:18px;margin:28px 0 10px}
.content p{margin:0 0 14px;color:#33383F;max-width:720px}
.content ul.bullets{list-style:disc;padding-left:22px;margin:0 0 16px;max-width:700px}
.content ul.bullets li{margin-bottom:7px;color:#33383F}
.content table{border-collapse:collapse;width:100%;max-width:720px;margin:6px 0 20px;font-size:14px}
.content th,.content td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
.content th{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);font-weight:600}
.content td code{font-family:var(--font-mono);font-size:12.5px;background:var(--brand-tint);color:var(--brand-dark);padding:2px 6px;border-radius:5px}
.inline-code{font-family:var(--font-mono);font-size:.88em;background:var(--brand-tint);color:var(--brand-dark);padding:2px 6px;border-radius:5px}

.callout{display:flex;gap:12px;background:var(--brand-tint);border:1px solid #CFE0ED;border-radius:14px;padding:14px 16px;margin:0 0 18px;max-width:720px;font-size:14.5px;color:var(--brand-dark)}
.callout--tip{background:var(--mint-bg);border-color:#C4E8D5;color:var(--mint-text)}
.callout--warn{background:var(--amber-bg);border-color:#F1DCBB;color:var(--amber-text)}

/* code blocks */
.code-block{background:var(--editor-bg);border-radius:14px;margin:6px 0 20px;max-width:720px;overflow:hidden}
.code-block-bar{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;background:var(--editor-bg-soft);border-bottom:1px solid var(--editor-line)}
.code-block-bar span{font-family:var(--font-mono);font-size:11px;color:#8098A8}
.copy-btn{font-family:var(--font-mono);font-size:11px;color:#B9C7D2;padding:4px 10px;border:1px solid var(--editor-line);border-radius:7px}
.copy-btn:hover{color:#fff;border-color:var(--brand)}
.code-block pre{margin:0;padding:16px;overflow-x:auto;font-family:var(--font-mono);font-size:13px;line-height:1.65;color:#D9E4EB}
.tok-sel{color:#8CC6F0}.tok-prop{color:#7FD9B9}.tok-val{color:#F2C57C}.tok-com{color:#5F7689}

/* live example demo boxes */
.demo-stage{border:1.5px dashed var(--line);border-radius:14px;background:var(--surface);padding:24px;margin:0 0 20px;max-width:720px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ============ TRY IT YOURSELF ============ */
.tryit{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;margin:10px 0 26px;max-width:920px;background:var(--surface);box-shadow:var(--shadow-card)}
.tryit-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--editor-bg-soft);border-bottom:1px solid var(--editor-line)}
.tryit-bar .dots{display:flex;gap:5px}
.tryit-bar .dots span{width:9px;height:9px;border-radius:50%;background:#3A4C5A}
.tryit-bar strong{font-family:var(--font-mono);font-size:12px;color:#B9C7D2;font-weight:500;flex:1}
.tryit-body{display:grid;grid-template-columns:1fr 1fr;min-height:260px}
.tryit textarea{border:none;resize:vertical;background:var(--editor-bg);color:#D9E4EB;font-family:var(--font-mono);font-size:13px;line-height:1.6;padding:16px;min-height:260px;width:100%}
.tryit textarea:focus{outline:none}
.tryit iframe{border:none;width:100%;height:100%;min-height:260px;background:#fff}
.tryit-foot{display:flex;align-items:center;gap:10px;padding:10px 14px;border-top:1px solid var(--line-soft);background:var(--paper)}
.tryit-foot .hint{font-size:12px;color:var(--ink-faint);margin-left:auto}

/* ============ QUIZ ============ */
.quiz{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);padding:24px;margin:10px 0 26px;max-width:760px;box-shadow:var(--shadow-card)}
.quiz-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.quiz-head h3{margin:0;font-size:19px}
.quiz-head .quiz-progress{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint)}
.quiz-q{padding:16px 0;border-top:1px solid var(--line-soft)}
.quiz-q p.q-text{font-weight:600;margin-bottom:12px;color:var(--ink)}
.quiz-q p.q-text .q-num{font-family:var(--font-mono);color:var(--brand-dark);margin-right:6px}
.quiz-opt{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;margin-bottom:8px;cursor:pointer;font-size:14.5px;transition:border-color .12s,background .12s}
.quiz-opt:hover{border-color:var(--brand)}
.quiz-opt input{margin-top:3px;accent-color:var(--brand)}
.quiz-opt code{font-family:var(--font-mono);font-size:13px}
.quiz-opt.is-correct{border-color:var(--mint);background:var(--mint-bg)}
.quiz-opt.is-wrong{border-color:var(--coral);background:var(--coral-bg)}
.quiz-explain{display:none;font-size:13px;color:var(--ink-soft);background:var(--paper);border-radius:10px;padding:10px 12px;margin-top:4px}
.quiz.is-graded .quiz-explain{display:block}
.quiz-actions{display:flex;align-items:center;gap:14px;margin-top:18px}
.quiz-result{font-family:var(--font-display);font-weight:700;font-size:16px;display:none}
.quiz.is-graded .quiz-result{display:block}
.quiz-result.pass{color:var(--mint-text)}
.quiz-result.fail{color:var(--coral-text)}

/* ============ GENERATOR CONTROLS ============ */
.gen-layout{display:grid;grid-template-columns:320px 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-card);margin:10px 0 26px}
.gen-controls{padding:22px;border-right:1px solid var(--line-soft);background:var(--paper)}
.gen-controls h3{font-size:15px;margin-bottom:16px}
.ctrl{margin-bottom:16px}
.ctrl label{display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:600;margin-bottom:7px}
.ctrl label output{font-family:var(--font-mono);font-size:12px;color:var(--brand-dark);font-weight:500}
.ctrl input[type=range]{width:100%;accent-color:var(--brand)}
.ctrl input[type=color]{width:44px;height:32px;border:1px solid var(--line);border-radius:8px;padding:2px;background:var(--surface);cursor:pointer}
.ctrl-row{display:flex;align-items:center;gap:12px}
.ctrl-check{display:flex;align-items:center;gap:9px;font-size:13.5px;font-weight:600;cursor:pointer}
.ctrl-check input{width:15px;height:15px;accent-color:var(--brand)}
.gen-preview{display:flex;align-items:center;justify-content:center;padding:40px;min-height:320px}
.gen-preview-box{width:180px;height:180px;background:var(--surface);border-radius:16px;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);transition:box-shadow .1s}
.gen-output{grid-column:1/-1;border-top:1px solid var(--line-soft)}
.gen-output .code-block{margin:0;max-width:none;border-radius:0}

/* ============ PREV / NEXT ============ */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:50px;max-width:920px}
.pager a{display:flex;flex-direction:column;gap:5px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);text-decoration:none !important;transition:border-color .12s,transform .12s}
.pager a:hover{border-color:var(--brand);transform:translateY(-2px)}
.pager .pager-dir{font-family:var(--font-mono);font-size:11px;color:var(--ink-faint)}
.pager .pager-title{font-family:var(--font-display);font-weight:600;font-size:15px;color:var(--ink)}
.pager a.pager-next{text-align:right;align-items:flex-end}
.pager a[hidden]{visibility:hidden}

/* related tools strip */
.related{margin-top:44px;max-width:920px}
.related h2{margin-top:0}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.related-grid a{display:flex;flex-direction:column;gap:4px;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-decoration:none !important}
.related-grid a:hover{border-color:var(--brand)}
.related-grid strong{font-size:14px;color:var(--ink)}
.related-grid span{font-size:12px;color:var(--ink-faint)}

/* ============ FOOTER ============ */
.site-footer{background:#181C21;color:#B7BEC4;padding:56px 0 0;margin-top:30px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;border-bottom:1px solid #2B3138}
.footer-brand p{font-size:13.5px;line-height:1.6;color:#8B9298;max-width:250px;margin:14px 0 0}
.footer-col h5{font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:#6E767D;margin:0 0 16px;font-weight:600}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:#B7BEC4;text-decoration:none}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding:20px 0;font-size:12.5px;color:#6E767D;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#6E767D}
.footer-bottom a:hover{color:#fff}

/* ============ MOBILE ============ */
.mobile-nav{position:fixed;inset:0;background:var(--paper);z-index:200;transform:translateX(100%);transition:transform .26s;overflow-y:auto}
.mobile-nav.is-open{transform:translateX(0)}
.mobile-nav-top{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;border-bottom:1px solid var(--line)}
.mobile-nav-body{padding:16px 22px 40px}
.mobile-nav-body .search-wrap{width:100%;margin-bottom:16px}

@media (max-width:1024px){
  .page-layout{grid-template-columns:1fr}
  .sidebar{position:static;max-height:none;margin-bottom:8px;display:none}
  .sidebar.is-open{display:block}
  .sidebar-toggle{display:inline-flex;margin-bottom:16px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1025px){.sidebar-toggle{display:none}}
@media (max-width:860px){
  .primary-nav,.header-actions .search-wrap{display:none}
  .hamburger{display:flex}
  .tryit-body{grid-template-columns:1fr}
  .tryit iframe{min-height:200px;border-top:1px solid var(--line)}
  .gen-layout{grid-template-columns:1fr}
  .gen-controls{border-right:none;border-bottom:1px solid var(--line-soft)}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  .footer-grid{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* ============================================================
   Generator page components (v2 — cssmatic.com-style tool)
   ============================================================ */

/* tab strip above the tool, like the original cssmatic.com */
.gen-tabs{display:flex;flex-wrap:wrap;gap:4px;margin:0}
.gen-tabs a{display:inline-flex;align-items:center;gap:7px;padding:11px 18px;border:1px solid var(--line);border-bottom:none;border-radius:12px 12px 0 0;background:var(--paper);font-size:13.5px;font-weight:600;color:var(--ink-soft);text-decoration:none !important}
.gen-tabs a:hover{color:var(--brand-dark);background:var(--brand-tint)}
.gen-tabs a.is-active{background:var(--surface);color:var(--ink);border-color:var(--line);position:relative}
.gen-tabs a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--surface)}
.gen-tabs + .gen-layout{border-top-left-radius:0;margin-top:0}

/* bigger cssmatic-style preview */
.gen-preview{background:
  linear-gradient(45deg,#F0F2F4 25%,transparent 25%),linear-gradient(-45deg,#F0F2F4 25%,transparent 25%),
  linear-gradient(45deg,transparent 75%,#F0F2F4 75%),linear-gradient(-45deg,transparent 75%,#F0F2F4 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0;background-color:#fff}
.gen-preview-box{width:230px;height:230px}

/* examples gallery — click a card to copy its CSS */
.ex-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px;margin:6px 0 10px;max-width:920px}
.ex-card{position:relative;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);padding:18px 14px 14px;text-align:center;cursor:pointer;transition:border-color .13s,transform .13s;box-shadow:var(--shadow-card)}
.ex-card:hover{border-color:var(--brand);transform:translateY(-3px)}
.ex-chip{width:92px;height:72px;margin:6px auto 16px;background:#fff;border-radius:12px}
.ex-name{font-family:var(--font-display);font-weight:600;font-size:14px;display:block}
.ex-hint{font-family:var(--font-mono);font-size:10.5px;color:var(--ink-faint);display:block;margin-top:4px}
.ex-card:hover .ex-hint{color:var(--brand-dark)}
.ex-card code{display:none}

/* learning prerequisites */
.req-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px;margin:6px 0 10px;max-width:920px}
.req-grid a{display:flex;flex-direction:column;gap:5px;padding:15px 16px;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;background:var(--surface);text-decoration:none !important;transition:border-color .13s,transform .13s}
.req-grid a:hover{border-color:var(--brand);transform:translateY(-2px)}
.req-grid strong{font-size:14px;color:var(--ink)}
.req-grid span{font-size:12px;color:var(--ink-faint)}
.req-grid .req-step{font-family:var(--font-mono);font-size:10.5px;color:var(--brand-dark)}

/* top-10 numbered related list */
.top10{list-style:none;counter-reset:t10;margin:6px 0 10px;padding:0;max-width:760px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-card)}
.top10 li{counter-increment:t10;border-bottom:1px solid var(--line-soft)}
.top10 li:last-child{border-bottom:none}
.top10 a{display:flex;align-items:center;gap:14px;padding:13px 18px;text-decoration:none !important;transition:background .12s}
.top10 a:hover{background:var(--brand-tint)}
.top10 a::before{content:counter(t10,decimal-leading-zero);font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--brand);min-width:26px}
.top10 strong{font-size:14.5px;color:var(--ink)}
.top10 span.t10-desc{font-size:12.5px;color:var(--ink-faint);margin-left:auto;text-align:right}
.top10 a:hover strong{color:var(--brand-dark)}

/* FAQ accordion */
.faq{max-width:760px;margin:6px 0 10px}
.faq details{border:1px solid var(--line);border-radius:14px;background:var(--surface);margin-bottom:10px;overflow:hidden}
.faq summary{list-style:none;display:flex;align-items:center;gap:12px;padding:15px 18px;cursor:pointer;font-weight:600;font-size:15px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";font-family:var(--font-mono);font-size:17px;color:var(--brand);width:18px;flex-shrink:0}
.faq details[open] summary::before{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line-soft)}
.faq .faq-a{padding:14px 18px 16px 48px;font-size:14.5px;color:var(--ink-soft)}
.faq .faq-a p{margin:0 0 10px;max-width:640px}
.faq .faq-a p:last-child{margin-bottom:0}

/* ending / closing prose */
.ending{max-width:720px;border-top:2px solid var(--line);margin-top:44px;padding-top:26px}
.ending p{color:var(--ink-soft)}

/* sidebar filter box */
.sidebar-filter{margin:0 2px 10px}
.sidebar-filter .search-box{border-radius:10px;padding:0 10px}
.sidebar-filter input{font-size:13px;padding:8px 0}
.sidebar-empty{font-size:12.5px;color:var(--ink-faint);text-align:center;padding:12px 6px;display:none}

/* toast */
.cm-toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(16px);background:var(--ink);color:#fff;padding:11px 20px;border-radius:999px;font-size:13.5px;font-weight:500;opacity:0;transition:opacity .2s,transform .2s;z-index:400;pointer-events:none}
.cm-toast.is-visible{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:640px){
  .top10 span.t10-desc{display:none}
  .gen-preview-box{width:170px;height:170px}
}

/* ============================================================
   Generator v3 — original cssmatic.com layout preserved:
   controls and preview are SEPARATE sections at full width;
   the sidebar is extra space, not taken from the tool.
   ============================================================ */
.wrap--wide{max-width:1560px}
.page-layout--gen{grid-template-columns:260px minmax(0,1fr);gap:32px}

.gen-split{display:grid;grid-template-columns:340px minmax(0,1fr);gap:24px;align-items:stretch;margin:0 0 26px}
.gen-tabs + .gen-split{margin-top:14px}

.gen-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:24px;align-self:start}
.gen-panel h3{font-size:15px;margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--line-soft)}

.gen-stage-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column}
.gen-stage-card .gen-preview{flex:1;min-height:430px;border:none}
.gen-stage-card .gen-output{border-top:1px solid var(--line-soft)}
.gen-stage-card .gen-output .code-block{margin:0;max-width:none;border-radius:0}

@media (max-width:1280px){
  .page-layout--gen{grid-template-columns:240px minmax(0,1fr)}
  .gen-split{grid-template-columns:300px minmax(0,1fr)}
}
@media (max-width:1024px){
  .page-layout--gen{grid-template-columns:1fr}
}
@media (max-width:900px){
  .gen-split{grid-template-columns:1fr}
  .gen-stage-card .gen-preview{min-height:340px}
}

/* tabs restyled for the split layout (no attached card below) */
.gen-tabs{border-bottom:2px solid var(--line);gap:2px}
.gen-tabs a{border:none;background:transparent;border-radius:10px 10px 0 0;margin-bottom:-2px;border-bottom:2px solid transparent}
.gen-tabs a:hover{background:var(--brand-tint)}
.gen-tabs a.is-active{background:transparent;color:var(--brand-dark);border-bottom:2px solid var(--brand)}
.gen-tabs a.is-active::after{display:none}

/* ============================================================
   Gradient skin — site-wide visual layer
   One signature gradient (deep blue → brand blue → sea mint)
   plus a warm counterpart, applied consistently everywhere.
   ============================================================ */
:root{
  --grad-brand: linear-gradient(120deg,#3E6787 0%,#5A8AB9 48%,#63B29A 100%);
  --grad-brand-v: linear-gradient(175deg,#3E6787 0%,#5A8AB9 55%,#63B29A 120%);
  --grad-warm: linear-gradient(120deg,#E0982D,#E0594A);
  --grad-ink: linear-gradient(120deg,#20242A,#3E6787);
  --grad-surface: linear-gradient(180deg,#FFFFFF,#F8FAFB);
}

/* ambient page background: soft color washes instead of flat grey */
body{
  background:
    radial-gradient(900px 480px at 88% -8%, rgba(90,138,185,.14), transparent 62%),
    radial-gradient(760px 420px at -12% 22%, rgba(99,178,154,.11), transparent 60%),
    radial-gradient(820px 520px at 55% 118%, rgba(224,152,45,.08), transparent 58%),
    var(--paper);
  background-attachment:fixed;
}

/* gradient hairline across the very top of every page */
.site-header::before{content:"";display:block;height:3px;background:var(--grad-brand)}

/* headings: gradient ink on page titles and section heads */
.page-head h1{
  background:var(--grad-ink);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:#20242A;
  padding-bottom:2px;
}
.content h2{position:relative;padding-left:16px}
.content h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:99px;background:var(--grad-brand-v)}
.eyebrow::before{background:var(--grad-brand)}

/* buttons */
.btn--brand{background:var(--grad-brand);background-size:150% 100%;background-position:0 0;transition:background-position .25s ease,box-shadow .15s ease}
.btn--brand:hover{background:var(--grad-brand);background-size:150% 100%;background-position:100% 0;box-shadow:0 10px 20px -10px rgba(62,103,135,.65)}
.btn--primary{background:var(--grad-ink)}
.btn--primary:hover{background:var(--grad-brand);box-shadow:0 10px 20px -10px rgba(62,103,135,.65)}

/* gradient-border hover treatment for every card-style link */
.ex-card:hover,.req-grid a:hover,.related-grid a:hover,.pager a:hover{
  border-color:transparent;
  background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand);
  background-origin:border-box;background-clip:padding-box,border-box;
}
.req-grid a{border-left:4px solid transparent;background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand-v);background-origin:border-box;background-clip:padding-box,border-box;border-top-color:var(--line);border-right-color:var(--line);border-bottom-color:var(--line)}
.req-grid a:hover{border-color:transparent;background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand)}

/* sidebar + panels */
.sidebar,.gen-panel{background:var(--grad-surface)}
.sidebar-title strong,.gen-panel h3{background:var(--grad-ink);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.gen-panel h3{border-image:var(--grad-brand) 1;border-bottom:2px solid;border-image-slice:0 0 1 0}

/* range sliders pick up the gradient track */
.ctrl input[type=range]{-webkit-appearance:none;appearance:none;height:6px;border-radius:99px;background:var(--grad-brand);outline-offset:4px}
.ctrl input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:#fff;border:2.5px solid var(--brand-dark);box-shadow:0 2px 6px rgba(32,36,42,.25);cursor:pointer}
.ctrl input[type=range]::-moz-range-thumb{width:15px;height:15px;border-radius:50%;background:#fff;border:2.5px solid var(--brand-dark);box-shadow:0 2px 6px rgba(32,36,42,.25);cursor:pointer}
.ctrl input[type=range]::-moz-range-track{height:6px;border-radius:99px;background:var(--grad-brand)}

/* tabs: gradient underline for the active tool */
.gen-tabs a.is-active{border-bottom:2px solid transparent;border-image:var(--grad-brand) 1;border-image-slice:0 0 1 0}

/* top-10 numbers + code bars */
.top10 a::before{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.code-block-bar,.tryit-bar{background:linear-gradient(120deg,#20303D,#243B4A)}

/* quiz + faq accents */
.quiz{border-top:3px solid transparent;border-image:var(--grad-brand) 1;border-image-slice:1 0 0 0}
.faq details[open]{border-color:transparent;background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand);background-origin:border-box;background-clip:padding-box,border-box}
.faq summary::before{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* search focus ring warms up */
.search-box:focus-within{border-color:transparent;background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand);background-origin:border-box;background-clip:padding-box,border-box;box-shadow:0 6px 18px -8px rgba(62,103,135,.35)}

/* footer: gradient hairline on top, subtle glow */
.site-footer{position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad-brand)}
.footer-news-form input:focus{border-color:#63B29A}

/* preview stage keeps its checkerboard but gains a soft vignette */
.gen-stage-card .gen-preview{box-shadow:inset 0 0 80px rgba(90,138,185,.06)}

/* ending block signature */
.ending{border-top:none;position:relative;padding-top:30px}
.ending::before{content:"";position:absolute;top:0;left:0;width:120px;height:4px;border-radius:99px;background:var(--grad-brand)}

/* fix: rounded corners on the quiz card (border-image ignores radius) */
.quiz{border-top:1px solid var(--line);border-image:none;position:relative;overflow:hidden}
.quiz::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-brand)}

/* ============================================================
   Site-wide GRADIENT BACKGROUND — every page now sits on a
   visible multi-color gradient canvas (blue → mint → warm),
   fixed while scrolling. Content cards stay white for contrast.
   ============================================================ */
body{
  background:
    radial-gradient(1100px 620px at 88% -12%, rgba(90,138,185,.30), transparent 62%),
    radial-gradient(950px 640px at -12% 28%, rgba(99,178,154,.26), transparent 62%),
    radial-gradient(1100px 720px at 58% 116%, rgba(224,152,45,.20), transparent 60%),
    linear-gradient(160deg, #E7F0F8 0%, #EAF5F0 48%, #F7F0E3 100%);
  background-attachment: fixed;
}

/* glassy surfaces over the gradient canvas */
.site-header{background:rgba(255,255,255,.72);backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);border-bottom-color:rgba(255,255,255,.65)}
.mobile-nav{background:linear-gradient(160deg,#E7F0F8,#EAF5F0 48%,#F7F0E3)}
.sidebar,.gen-panel{background:rgba(255,255,255,.82);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-color:rgba(255,255,255,.75)}
.gen-stage-card,.tryit,.quiz,.top10,.faq details,.ex-card,.req-grid a,.related-grid a,.pager a{border-color:rgba(255,255,255,.85)}
.gen-stage-card,.tryit,.quiz,.top10{box-shadow:0 1px 2px rgba(32,36,42,.05),0 18px 40px -22px rgba(62,103,135,.35)}
.tryit-foot{background:rgba(245,247,248,.7)}
.acc summary:hover{background:rgba(90,138,185,.08)}

/* keep long-form text readable: soft white plate behind prose-heavy areas */
.content table{background:rgba(255,255,255,.65);border-radius:12px;overflow:hidden}
.content th,.content td{border-bottom-color:rgba(32,36,42,.08)}
.callout{backdrop-filter:blur(4px)}

/* ============================================================
   DARK THEME  (default is light; toggled via header icon,
   persisted in localStorage as "cssmatic-theme")
   ============================================================ */
[data-theme="dark"]{
  --paper:#141A21; --surface:#1D2732;
  --ink:#E8EDF2; --ink-soft:#AFBAC4; --ink-faint:#7C8894;
  --line:#2C3945; --line-soft:#243039;
  --brand-tint:#22303D;
  --grad-ink:linear-gradient(120deg,#E8EDF2,#9FC2DC);
  --grad-surface:linear-gradient(180deg,#1D2732,#1A232D);
  --shadow-card:0 1px 2px rgba(0,0,0,.3),0 10px 24px -14px rgba(0,0,0,.6);
}
[data-theme="dark"] body{
  background:
    radial-gradient(1100px 620px at 88% -12%, rgba(90,138,185,.22), transparent 62%),
    radial-gradient(950px 640px at -12% 28%, rgba(99,178,154,.16), transparent 62%),
    radial-gradient(1100px 720px at 58% 116%, rgba(224,152,45,.10), transparent 60%),
    linear-gradient(160deg,#121922 0%,#14201F 48%,#1C1A15 100%);
  background-attachment:fixed;
}
[data-theme="dark"] .site-header{background:rgba(20,26,33,.75);border-bottom-color:rgba(44,57,69,.8)}
[data-theme="dark"] .sidebar,[data-theme="dark"] .gen-panel{background:rgba(29,39,50,.85);border-color:rgba(44,57,69,.8)}
[data-theme="dark"] .dropdown-panel,[data-theme="dark"] .search-results{background:var(--surface);border-color:var(--line)}
[data-theme="dark"] .search-box{background:var(--surface);border-color:var(--line)}
[data-theme="dark"] .search-box:focus-within{background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand)}
[data-theme="dark"] .gen-stage-card,[data-theme="dark"] .tryit,[data-theme="dark"] .quiz,
[data-theme="dark"] .top10,[data-theme="dark"] .faq details,[data-theme="dark"] .ex-card,
[data-theme="dark"] .req-grid a,[data-theme="dark"] .related-grid a,[data-theme="dark"] .pager a,
[data-theme="dark"] .col-card,[data-theme="dark"] .m-card,[data-theme="dark"] .review-card,
[data-theme="dark"] .g-card{background:var(--surface);border-color:var(--line)}
[data-theme="dark"] .ex-card:hover,[data-theme="dark"] .req-grid a:hover,[data-theme="dark"] .related-grid a:hover,
[data-theme="dark"] .pager a:hover,[data-theme="dark"] .g-card:hover,[data-theme="dark"] .faq details[open]{
  background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand)}
[data-theme="dark"] .req-grid a{background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand-v)}
[data-theme="dark"] .content p,[data-theme="dark"] .content ul.bullets li{color:#C7D0D9}
[data-theme="dark"] .content table{background:rgba(29,39,50,.7)}
[data-theme="dark"] .content th,[data-theme="dark"] .content td{border-bottom-color:rgba(255,255,255,.08)}
[data-theme="dark"] .page-head h1{color:#E8EDF2}
[data-theme="dark"] .gen-preview{background-color:#232E3A;background-image:
  linear-gradient(45deg,#2B3845 25%,transparent 25%),linear-gradient(-45deg,#2B3845 25%,transparent 25%),
  linear-gradient(45deg,transparent 75%,#2B3845 75%),linear-gradient(-45deg,transparent 75%,#2B3845 75%)}
[data-theme="dark"] .gen-preview-box{background:#2B3845;color:#AFBAC4}
[data-theme="dark"] .callout{background:#22303D;border-color:#2C3945;color:#9FC2DC}
[data-theme="dark"] .callout--tip{background:#1D3229;border-color:#2A4A3B;color:#8FD4BC}
[data-theme="dark"] .callout--warn{background:#38301D;border-color:#54452A;color:#F2C57C}
[data-theme="dark"] .inline-code,[data-theme="dark"] .content td code{background:#22303D;color:#9FC2DC}
[data-theme="dark"] .quiz-opt{border-color:var(--line)}
[data-theme="dark"] .quiz-opt.is-correct{background:#1D3229;border-color:#2FAF71}
[data-theme="dark"] .quiz-opt.is-wrong{background:#3A2422;border-color:#E0594A}
[data-theme="dark"] .quiz-explain{background:#22303D}
[data-theme="dark"] .tryit-foot{background:rgba(20,26,33,.6)}
[data-theme="dark"] .mobile-nav{background:linear-gradient(160deg,#121922,#14201F 48%,#1C1A15)}
[data-theme="dark"] .acc summary:hover,[data-theme="dark"] .search-results a:hover,
[data-theme="dark"] .search-results a.is-active,[data-theme="dark"] .top10 a:hover{background:#22303D}
[data-theme="dark"] .sort-select,[data-theme="dark"] .btn--ghost{border-color:var(--line);color:var(--ink)}
[data-theme="dark"] .gen-tabs a{color:var(--ink-soft)}
[data-theme="dark"] .gen-tabs a:hover{background:#22303D}
[data-theme="dark"] .featured-strip .fl{color:#7C8894}
[data-theme="dark"] .featured-strip .fl:hover{color:#E8EDF2}
[data-theme="dark"] .demo-stage{background:var(--surface);border-color:var(--line)}
[data-theme="dark"] .ex-chip{background:#2B3845}

/* theme toggle button */
.theme-toggle{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--ink-soft);flex-shrink:0}
.theme-toggle:hover{background:var(--brand-tint);color:var(--brand-dark)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .ico-moon{display:block}
.theme-toggle .ico-sun{display:none}
[data-theme="dark"] .theme-toggle .ico-moon{display:none}
[data-theme="dark"] .theme-toggle .ico-sun{display:block}

/* certificate callout on lesson pages */
.cert-callout{display:flex;align-items:center;gap:18px;background:linear-gradient(120deg,#20303D,#3E6787 60%,#2E5E52);border-radius:18px;padding:20px 24px;margin:34px 0 8px;max-width:760px;color:#EAF1F6;box-shadow:0 20px 44px -22px rgba(9,15,22,.5)}
.cert-callout .cc-seal{flex-shrink:0;width:46px;height:46px;border-radius:50%;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff}
.cert-callout strong{display:block;font-family:var(--font-display);font-size:16px;color:#fff;margin-bottom:3px}
.cert-callout p{font-size:13.5px;color:#B9C7D2;margin:0}
.cert-callout .btn{margin-left:auto;flex-shrink:0}
@media (max-width:640px){.cert-callout{flex-direction:column;align-items:flex-start}.cert-callout .btn{margin-left:0}}

/* certificate page */
.progress-bar{height:12px;border-radius:99px;background:var(--line-soft);overflow:hidden;max-width:720px;margin:8px 0 8px}
.progress-bar > span{display:block;height:100%;background:var(--grad-brand);border-radius:99px;transition:width .4s ease}
.module-status{list-style:none;max-width:720px;margin:14px 0 8px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);overflow:hidden}
.module-status li{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line-soft);font-size:14px}
.module-status li:last-child{border-bottom:none}
.module-status .ms-state{margin-left:auto;font-family:var(--font-mono);font-size:11px}
.module-status .done{color:var(--mint-text)}
.module-status .todo{color:var(--ink-faint)}
.cert-form{display:flex;gap:10px;flex-wrap:wrap;max-width:720px;margin:16px 0 26px}
.cert-form input{flex:1;min-width:220px;border:1.5px solid var(--line);border-radius:12px;padding:11px 14px;background:var(--surface);color:var(--ink)}
.cert-full{max-width:720px;background:#fff;border-radius:18px;padding:38px;color:#20242A;box-shadow:0 30px 60px -26px rgba(9,15,22,.45);position:relative;overflow:hidden}
.cert-full::before{content:"";position:absolute;inset:0;border:10px solid transparent;border-image:linear-gradient(120deg,#3E6787,#5A8AB9 48%,#63B29A) 1;pointer-events:none}
.cert-full .cf-head{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:#8A8D90;text-align:center}
.cert-full h2{text-align:center;font-size:30px;margin:12px 0 4px;background:linear-gradient(120deg,#20242A,#3E6787);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.cert-full .cf-sub{text-align:center;font-size:13px;color:#57595B;margin-bottom:22px}
.cert-full .cf-name{text-align:center;font-family:var(--font-display);font-size:34px;font-weight:700;border-bottom:2px solid #E1E5E8;max-width:420px;margin:0 auto 22px;padding-bottom:12px}
.cert-full .cf-meta{display:flex;justify-content:space-between;align-items:flex-end;font-family:var(--font-mono);font-size:11px;color:#8A8D90;margin-top:30px}
.cert-full .cert-seal{width:52px;height:52px;font-size:22px}
@media print{
  body *{visibility:hidden}
  .cert-full,.cert-full *{visibility:visible}
  .cert-full{position:fixed;inset:0;margin:auto;box-shadow:none;max-width:none;width:90%;height:fit-content}
}

/* ============ platform expansion components ============ */
.menu-links{display:grid;grid-template-columns:1fr 1fr;gap:2px;max-height:420px;overflow-y:auto;padding:6px}
.menu-link{display:block;padding:9px 10px;border-radius:10px}
.menu-link strong{display:block;font-size:13px;font-weight:600;color:var(--ink)}
.menu-link span{font-size:11px;color:var(--ink-faint)}
.menu-link:hover{background:var(--brand-tint)}
.menu-link--all{grid-column:1/-1;background:var(--brand-tint)}
.menu-link--all strong{color:var(--brand-dark)}
@media (max-width:640px){.menu-links{grid-template-columns:1fr}}

.back-to-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:12px;background:var(--surface);border:1px solid var(--line);color:var(--brand-dark);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-card);opacity:0;pointer-events:none;transform:translateY(8px);transition:opacity .25s,transform .25s;z-index:60}
.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:none}
.back-to-top:hover{background:var(--brand-tint)}

/* landing filter bar + card grids */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:22px 0 8px}
.filter-bar .search-box{flex:1;min-width:220px}
.filter-bar select{border:1.5px solid var(--line);border-radius:10px;padding:9px 12px;background:var(--surface);color:var(--ink);font-size:13.5px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 4px}
.chip{border:1.5px solid var(--line);border-radius:99px;padding:6px 14px;font-size:12.5px;background:var(--surface);color:var(--ink-soft);cursor:pointer}
.chip:hover{border-color:var(--brand)}
.chip.is-on{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-dark);font-weight:600}
.result-count{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);margin:8px 0 16px;min-height:15px}
.empty-note{padding:34px;text-align:center;color:var(--ink-faint);border:1.5px dashed var(--line);border-radius:14px;margin:10px 0}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:14px 0 30px}
.p-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:8px;position:relative;box-shadow:var(--shadow-card)}
.p-card:hover{border-color:transparent;background-image:linear-gradient(var(--surface),var(--surface)),var(--grad-brand);background-origin:border-box;background-clip:padding-box,border-box}
.p-card h3{font-size:15.5px;margin:0}
.p-card p{font-size:13px;color:var(--ink-soft);margin:0;flex:1}
.p-card .pc-ico{width:38px;height:38px;border-radius:10px;background:var(--brand-tint);display:flex;align-items:center;justify-content:center;font-size:17px}
.p-card .pc-cat{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;color:var(--ink-faint);text-transform:uppercase}
.p-card .pc-badge{position:absolute;top:14px;right:14px;font-size:10.5px;font-weight:700;padding:3px 9px;border-radius:99px;background:var(--mint-tint,#DFF3EA);color:var(--mint-text,#1E7A50)}
.p-card .pc-badge--new{background:#FBEEDD;color:#9A6716}
.p-card .btn{align-self:flex-start;margin-top:4px}

/* comparison tables: scrollable + sticky first column */
.table-scroll{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:14px;-webkit-overflow-scrolling:touch}
.table-scroll table{margin:0;min-width:720px;border-radius:0}
.table-scroll th:first-child,.table-scroll td:first-child{position:sticky;left:0;background:var(--surface);z-index:1;box-shadow:2px 0 0 var(--line-soft)}
.table-scroll thead th{position:sticky;top:0;background:var(--surface)}

/* blog cards */
.blog-card{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-card)}
.blog-card .bc-thumb{height:120px;display:flex;align-items:flex-end;padding:12px;color:#fff;font-family:var(--font-display);font-weight:700;font-size:15px;text-shadow:0 1px 4px rgba(0,0,0,.35)}
.blog-card .bc-body{padding:4px 16px 16px;display:flex;flex-direction:column;gap:7px;flex:1}
.blog-card .bc-cat{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-dark)}
.blog-card h3{font-size:15.5px;margin:0}.blog-card h3 a{color:var(--ink)}
.blog-card p{font-size:13px;color:var(--ink-soft);margin:0;flex:1}
.blog-card .bc-meta{font-size:11.5px;color:var(--ink-faint);font-family:var(--font-mono)}

/* template + showcase preview thumbs (pure-CSS recreations) */
.shot{height:150px;border-radius:12px;border:1px solid var(--line);overflow:hidden;position:relative;background:#fff}
.shot .sh-bar{height:16px;background:#E8ECF0;display:flex;gap:4px;align-items:center;padding:0 8px}
.shot .sh-bar i{width:6px;height:6px;border-radius:50%;background:#C6CDD4}
.shot .sh-label{position:absolute;bottom:6px;right:8px;font-size:9px;font-family:var(--font-mono);background:rgba(20,26,33,.72);color:#fff;padding:2px 7px;border-radius:99px}
.pal{display:flex;gap:5px}.pal i{width:16px;height:16px;border-radius:5px;border:1px solid rgba(0,0,0,.08)}
.tag-row{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:10.5px;font-family:var(--font-mono);background:var(--line-soft);color:var(--ink-soft);padding:3px 9px;border-radius:99px}
[data-theme="dark"] .shot{background:#232E3A}
[data-theme="dark"] .shot .sh-bar{background:#2B3845}
[data-theme="dark"] .p-card .pc-badge{background:#1D3229;color:#8FD4BC}
[data-theme="dark"] .p-card .pc-badge--new{background:#38301D;color:#F2C57C}
[data-theme="dark"] .table-scroll th:first-child,[data-theme="dark"] .table-scroll td:first-child,[data-theme="dark"] .table-scroll thead th{background:var(--surface)}