/* =========================================================================
   CryptoLibrarie — main.css  · light teal/blue finance-education theme
   ========================================================================= */
:root{
  --bg:#f5f8fc; --card:#ffffff; --card-2:#eef4fb;
  --navy:#0d2440; --navy-2:#0a1b33;
  --teal:#12b5c9; --teal-600:#0e97a8; --teal-700:#0b7d8b; --teal-050:#e7f8fb;
  --blue:#2563eb; --orange:#f7931a; --green:#16a34a; --purple:#7c3aed;
  --ink:#13233f; --body:#46566f; --muted:#7a8699; --faint:#9aa5b5;
  --line:#e4eaf2; --line-2:#eef2f8;
  --radius:14px; --radius-lg:18px; --radius-sm:10px;
  --maxw:1200px; --gutter:20px;
  --shadow:0 10px 30px rgba(17,41,80,.07);
  --shadow-lg:0 22px 50px rgba(17,41,80,.12);
  --fh:'Prompt',system-ui,-apple-system,'Segoe UI',sans-serif;
  --fb:'IBM Plex Sans Thai',system-ui,-apple-system,'Segoe UI',sans-serif;
  --t:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--fb);font-size:16.5px;line-height:1.78;color:var(--body);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--teal-600);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--teal-700)}
h1,h2,h3,h4{font-family:var(--fh);color:var(--ink);line-height:1.25;margin:0 0 .5em;font-weight:600}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(36px,5vw,58px)}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:16px;background:var(--teal);color:#fff;padding:10px 16px;border-radius:8px;z-index:200}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--fh);font-weight:500;font-size:.98rem;line-height:1;
  padding:12px 22px;border-radius:10px;background:var(--teal);color:#fff;border:0;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t);box-shadow:0 8px 20px rgba(18,181,201,.28);white-space:nowrap}
.btn:hover{background:var(--teal-600);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(18,181,201,.38)}
.btn .icon{width:17px;height:17px}
.btn--ghost{background:transparent;border:1.5px solid var(--line);box-shadow:none;color:var(--ink)}
.btn--ghost:hover{background:var(--teal-050);border-color:var(--teal);color:var(--teal-700)}
.btn--light{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.25);box-shadow:none}
.btn--light:hover{background:#fff;color:var(--navy)}
.btn--sm{padding:9px 16px;font-size:.9rem}

/* ---------- chips / badges ---------- */
.chip{display:inline-flex;align-items:center;font-family:var(--fh);font-weight:500;font-size:.75rem;padding:4px 11px;border-radius:30px;color:#fff}
.chip--teal{background:var(--teal)}
.chip--orange{background:var(--orange)}
.chip--green{background:var(--green)}
.chip--blue{background:var(--blue)}
.chip--purple{background:var(--purple)}
.chip--soft{background:var(--teal-050);color:var(--teal-700)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.3) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:70px}
.brand{display:flex;align-items:center;gap:9px;flex-shrink:0;line-height:0}
.brand .custom-logo,.brand img{max-height:44px;width:auto;height:auto;display:block}
.custom-logo-link{display:inline-flex;line-height:0}
.brand__mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--teal),var(--blue));display:grid;place-items:center;color:#fff;flex:none}
.brand__mark svg{width:22px;height:22px}
.brand__name{font-family:var(--fh);font-weight:600;font-size:1.2rem;color:var(--ink)}
.brand__name b{color:var(--teal-600);font-weight:600}
.nav{display:flex;align-items:center;gap:2px}
.nav a{font-family:var(--fh);font-weight:500;color:var(--body);padding:9px 13px;border-radius:9px;font-size:.98rem;white-space:nowrap;position:relative}
.nav a:hover{color:var(--teal-700)}
.nav a.is-active{color:var(--teal-700)}
.nav a.is-active::after{content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2.5px;background:var(--teal);border-radius:3px}
.header-search{flex:1;max-width:360px;margin-left:auto;position:relative}
.header-search input{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:30px;padding:10px 16px 10px 40px;font-family:var(--fb);font-size:.92rem;color:var(--ink)}
.header-search .ic{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted)}
.header-tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.icon-btn{width:42px;height:42px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--body);cursor:pointer;transition:all var(--t)}
.icon-btn:hover{color:var(--teal-700);border-color:var(--teal)}
.icon-btn svg{width:20px;height:20px}
.nav-toggle{display:none}

/* ---------- mobile drawer ---------- */
.drawer-backdrop{position:fixed;inset:0;background:rgba(13,36,64,.4);z-index:150;opacity:0;visibility:hidden;transition:opacity var(--t)}
.drawer-backdrop.open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(82vw,320px);background:#fff;z-index:160;transform:translateX(100%);transition:transform .25s ease;display:flex;flex-direction:column;border-left:1px solid var(--line);padding:18px}
.drawer.open{transform:none}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer nav{display:flex;flex-direction:column;gap:2px;margin-top:6px}
.drawer nav a{display:flex;align-items:center;gap:12px;font-family:var(--fh);font-weight:500;color:var(--body);padding:13px 13px;border-radius:10px;font-size:1.05rem}
.drawer nav a .ic{width:20px;height:20px;color:var(--muted)}
.drawer nav a:hover,.drawer nav a.is-active{background:var(--teal-050);color:var(--teal-700)}
.drawer nav a.is-active .ic{color:var(--teal-600)}

/* ---------- hero ---------- */
.hero{background:radial-gradient(900px 500px at 85% 10%,rgba(18,181,201,.22),transparent 60%),linear-gradient(135deg,#0d2a4a,#0a1b33);color:#dbe4f0;overflow:hidden}
.hero__grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;padding-block:clamp(40px,6vw,76px)}
.hero__eyebrow{display:inline-flex;align-items:center;gap:7px;color:#8fe6f0;font-family:var(--fh);font-weight:500;font-size:.85rem;background:rgba(18,181,201,.14);border:1px solid rgba(18,181,201,.3);padding:6px 14px;border-radius:30px;margin-bottom:16px}
.hero h1{font-size:clamp(2rem,4.2vw,3.1rem);font-weight:700;color:#fff;line-height:1.14;margin-bottom:.4em}
.hero h1 .hl{color:var(--teal);display:inline}
.hero__sub{color:#aebdd0;font-size:1.12rem;max-width:46ch;margin-bottom:26px}
.hero-search{display:flex;background:#fff;border-radius:12px;padding:6px;max-width:520px;box-shadow:var(--shadow-lg)}
.hero-search input{flex:1;border:0;background:transparent;padding:12px 16px;font-family:var(--fb);font-size:1rem;color:var(--ink);outline:none}
.hero-search button{flex:none}
.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
.hstat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:16px 14px}
.hstat__ic{width:38px;height:38px;border-radius:10px;background:rgba(18,181,201,.16);color:var(--teal);display:grid;place-items:center;margin-bottom:10px}
.hstat__ic svg{width:21px;height:21px}
.hstat b{display:block;font-family:var(--fh);font-weight:700;font-size:1.4rem;color:#fff;line-height:1}
.hstat span{color:#9fb0c6;font-size:.85rem}
.hero__art{position:relative;display:grid;place-items:center;min-height:260px}
.hero__art .coin{position:absolute;border-radius:50%;display:grid;place-items:center;font-family:var(--fh);font-weight:700;color:#fff;box-shadow:0 12px 30px rgba(0,0,0,.35)}

/* ---------- section head ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.sec-head__title{font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:600;color:var(--ink);margin:0}
.sec-head__sub{color:var(--muted);margin:.35em 0 0;font-size:1rem}
.sec-head__more{font-family:var(--fh);font-weight:500;font-size:.95rem;color:var(--teal-600);display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.sec-head__more:hover{color:var(--teal-700)}
.sec-head__more .icon{width:16px;height:16px}

/* ---------- learning-level cards ---------- */
.levels{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.level{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 22px;transition:transform var(--t),box-shadow var(--t),border-color var(--t);display:block}
.level:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.level__ic{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;margin-bottom:16px;color:#fff}
.level__ic svg{width:28px;height:28px}
.lv-1 .level__ic{background:linear-gradient(135deg,#f59e0b,#f97316)}
.lv-2 .level__ic{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.lv-3 .level__ic{background:linear-gradient(135deg,#8b5cf6,#7c3aed)}
.lv-4 .level__ic{background:linear-gradient(135deg,#10b981,#059669)}
.level h3{font-size:1.12rem;margin-bottom:.3em;color:var(--ink)}
.level p{color:var(--muted);font-size:.93rem;margin:0}

/* ---------- category cards ---------- */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 22px;transition:transform var(--t),box-shadow var(--t),border-color var(--t);text-align:left}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--teal)}
.cat-card__ic{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;margin-bottom:16px;color:#fff}
.cat-card__ic svg{width:28px;height:28px}
.cat-card h3{font-size:1.1rem;margin-bottom:.25em;color:var(--ink)}
.cat-card p{color:var(--muted);font-size:.9rem;margin:0}
.ic-orange{background:linear-gradient(135deg,#f59e0b,#f7931a)}
.ic-blue{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.ic-green{background:linear-gradient(135deg,#10b981,#16a34a)}
.ic-purple{background:linear-gradient(135deg,#8b5cf6,#7c3aed)}
.ic-teal{background:linear-gradient(135deg,#14b8c4,#0e97a8)}

/* ---------- article cards grid ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform var(--t),box-shadow var(--t),border-color var(--t);display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.card__thumb{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--card-2)}
.card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card__thumb img{transform:scale(1.05)}
.card__ph{position:absolute;inset:0;background:linear-gradient(135deg,#e0ecf8,#d3e6f5)}
.card .chip{position:absolute;left:10px;top:10px}
.card__body{padding:15px 17px 17px;display:flex;flex-direction:column;flex:1}
.card__title{font-size:1.03rem;font-weight:600;line-height:1.4;margin:0 0 8px}
.card__title a{color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__title a:hover{color:var(--teal-700)}
.card__excerpt{color:var(--muted);font-size:.9rem;margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:6px 16px;color:var(--faint);font-size:.82rem}
.card__meta span{display:inline-flex;align-items:center;gap:5px}
.card__meta .ic{width:15px;height:15px}

/* ---------- page hero (archive) ---------- */
.page-hero{background:radial-gradient(700px 400px at 90% 0,rgba(18,181,201,.2),transparent 60%),linear-gradient(135deg,#0d2a4a,#0a1b33);color:#dbe4f0;border-bottom:1px solid var(--line)}
.page-hero__inner{max-width:var(--maxw);margin-inline:auto;padding:clamp(34px,5vw,60px) var(--gutter)}
.page-hero h1{font-size:clamp(1.9rem,3.6vw,2.7rem);font-weight:700;color:#fff;margin:0 0 .25em}
.page-hero p{color:#aebdd0;font-size:1.06rem;max-width:60ch;margin:0}
.breadcrumbs{font-size:.86rem;color:#8da0b8;margin-bottom:12px}
.breadcrumbs a{color:#a7b7cc}.breadcrumbs a:hover{color:#fff}

/* ---------- filters ---------- */
.filters{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-block:26px}
.filters a{font-family:var(--fh);font-weight:500;font-size:.94rem;color:var(--body);background:#fff;border:1px solid var(--line);padding:9px 18px;border-radius:30px;transition:all var(--t);white-space:nowrap}
.filters a:hover{border-color:var(--teal);color:var(--teal-700)}
.filters a.is-active{background:var(--teal);color:#fff;border-color:var(--teal)}

/* ---------- single article (2-col) ---------- */
.article-wrap{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.article-main{min-width:0}
.article-title{font-size:clamp(1.7rem,3.2vw,2.5rem);font-weight:700;color:var(--ink);margin:12px 0 14px;line-height:1.2}
.article-lead{font-size:1.12rem;color:var(--muted);margin-bottom:18px}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--faint);font-size:.9rem;margin-bottom:20px;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-meta .avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--teal),var(--blue));display:grid;place-items:center;color:#fff;font-family:var(--fh);font-weight:600;font-size:.9rem}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta .ic{width:16px;height:16px}
.article-cover{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:24px}
.article-cover img{width:100%}
.prose{color:#3b4a63;font-size:1.08rem}
.prose h2{color:var(--ink);font-size:1.55rem;margin:1.6em 0 .5em;scroll-margin-top:90px}
.prose h3{color:var(--ink);font-size:1.25rem;margin:1.4em 0 .5em;scroll-margin-top:90px}
.prose a{color:var(--teal-700);text-decoration:underline;text-underline-offset:3px}
.prose img{border-radius:12px;margin-block:1.2em}
.prose ul:not(.toc__list){list-style:disc;padding-left:1.3em;margin-bottom:1em}
.prose blockquote{border-left:4px solid var(--teal);background:var(--teal-050);margin:1.4em 0;padding:16px 22px;border-radius:0 12px 12px 0;color:var(--ink)}
.prose code{background:var(--card-2);padding:2px 7px;border-radius:5px;font-size:.92em}

/* sidebar */
.article-side{position:sticky;top:90px;display:flex;flex-direction:column;gap:22px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px}
.side-box__title{font-family:var(--fh);font-weight:600;font-size:1.02rem;color:var(--ink);margin:0 0 14px;display:flex;align-items:center;gap:8px}
.side-box__title .icon{width:18px;height:18px;color:var(--teal-600)}
.toc__list{counter-reset:toc;display:flex;flex-direction:column;gap:2px}
.toc__list a{display:flex;gap:10px;align-items:flex-start;color:var(--body);font-size:.93rem;padding:7px 8px;border-radius:8px;line-height:1.4}
.toc__list a::before{counter-increment:toc;content:counter(toc);flex:none;width:22px;height:22px;border-radius:50%;background:var(--teal-050);color:var(--teal-700);font-family:var(--fh);font-weight:600;font-size:.75rem;display:grid;place-items:center}
.toc__list a:hover,.toc__list a.active{background:var(--teal-050);color:var(--teal-700)}
.toc__list a.lvl-3{padding-left:30px;font-size:.88rem}
.toc__list a.lvl-3::before{display:none}
.side-rel{display:flex;flex-direction:column;gap:12px}
.side-rel a{display:flex;gap:11px;align-items:center}
.side-rel__thumb{width:62px;height:46px;border-radius:9px;overflow:hidden;background:var(--card-2);flex:none}
.side-rel__thumb img{width:100%;height:100%;object-fit:cover}
.side-rel__t{font-size:.9rem;font-weight:500;color:var(--ink);line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-rel a:hover .side-rel__t{color:var(--teal-700)}
.refs li{margin-bottom:10px}
.refs a{display:flex;gap:8px;align-items:flex-start;color:var(--teal-700);font-size:.9rem;word-break:break-word}
.refs a .ic{width:16px;height:16px;flex:none;margin-top:3px;color:var(--muted)}

/* pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:40px;flex-wrap:wrap}
.pagination .page-numbers{display:grid;place-items:center;min-width:42px;height:42px;padding:0 12px;border-radius:10px;background:#fff;border:1px solid var(--line);color:var(--body);font-family:var(--fh);font-weight:500}
.pagination .page-numbers.current{background:var(--teal);color:#fff;border-color:var(--teal)}
.pagination a.page-numbers:hover{border-color:var(--teal);color:var(--teal-700)}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#9fb0c6;padding-block:clamp(36px,5vw,54px) 0;margin-top:30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px}
.site-footer h4{font-family:var(--fh);color:#fff;font-size:1rem;margin-bottom:15px}
.site-footer a{color:#9fb0c6}.site-footer a:hover{color:var(--teal)}
.footer-brand p{font-size:.92rem;max-width:36ch;margin-top:12px}
.footer-links li{margin-bottom:9px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-block:20px;font-size:.85rem;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
.footer-disclaimer{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:14px 18px;margin-top:26px;font-size:.82rem;color:#8ea0b8;line-height:1.7}

/* search form */
.search-form{display:flex;gap:8px}
.search-form input[type=search]{flex:1;background:#fff;border:1px solid var(--line);color:var(--ink);padding:12px 15px;border-radius:10px;font-size:1rem;font-family:var(--fb)}
.search-form button{border:0;background:var(--teal);color:#fff;border-radius:10px;padding:0 18px;font-family:var(--fh);cursor:pointer}

/* ---------- glossary ---------- */
.gloss-wrap{display:grid;grid-template-columns:260px 1fr;gap:32px;align-items:start}
.gloss-side{position:sticky;top:90px}
.gloss-cats{display:flex;flex-direction:column;gap:3px}
.gloss-cat{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;font-family:var(--fb);font-size:.95rem;color:var(--body);background:transparent;border:0;padding:10px 12px;border-radius:9px;cursor:pointer;transition:all var(--t)}
.gloss-cat span{font-size:.8rem;color:var(--faint);background:var(--bg);padding:1px 9px;border-radius:20px}
.gloss-cat:hover{background:var(--teal-050);color:var(--teal-700)}
.gloss-cat.is-active{background:var(--teal-050);color:var(--teal-700);font-weight:500}
.gloss-cat.is-active span{background:var(--teal);color:#fff}
.az-bar{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:22px}
.az{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;border-radius:9px;font-family:var(--fh);font-weight:500;font-size:.9rem;color:var(--body);cursor:pointer;transition:all var(--t);padding:0}
.az:hover{border-color:var(--teal);color:var(--teal-700)}
.az.is-active{background:var(--teal);color:#fff;border-color:var(--teal)}
.az[data-letter="all"]{width:auto;padding:0 14px}
.gloss-list{display:flex;flex-direction:column;gap:12px}
.gterm{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;transition:border-color var(--t),box-shadow var(--t)}
.gterm:hover{border-color:var(--teal);box-shadow:var(--shadow)}
.gterm__badge{flex:none;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--teal),var(--blue));color:#fff;display:grid;place-items:center;font-family:var(--fh);font-weight:700;font-size:1.3rem}
.gterm__body{min-width:0;flex:1}
.gterm__head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.gterm__name{font-family:var(--fh);font-weight:600;font-size:1.1rem;color:var(--ink);margin:0}
.gterm__abbr{font-weight:500;color:var(--teal-600);font-size:.9rem}
.gterm__def{color:var(--body);font-size:.95rem;margin:0;line-height:1.6}
@media(max-width:860px){.gloss-wrap{grid-template-columns:1fr}.gloss-side{position:static}}

.empty{text-align:center;color:var(--muted);padding:60px 0;font-size:1.05rem}
.text-center{text-align:center}
.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .grid-4,.levels,.cats{grid-template-columns:repeat(2,1fr)}
  .article-wrap{grid-template-columns:1fr}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .article-side .side-box{flex:1 1 260px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:820px){
  .nav,.header-search{display:none}
  .nav-toggle{display:grid}
  .hero__grid{grid-template-columns:1fr}
  .hero__art{display:none}
  .hero__stats{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  body{font-size:16px}
  .grid-4,.grid-3,.levels,.cats{grid-template-columns:1fr}
  .hero__stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .custom-logo,.brand img{max-height:36px}
  .article-side{flex-direction:column}
}
/* ---------- Learning Path ---------- */
.section--alt{background:var(--card-2)}
.container--narrow{max-width:820px}
.page-hero--path{background:radial-gradient(640px 360px at 88% -10%,rgba(18,181,201,.28),transparent 60%),radial-gradient(500px 320px at 10% 120%,rgba(37,99,235,.22),transparent 60%),linear-gradient(135deg,#0d2a4a,#0a1b33)}
.path-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:4px 0 26px}
.ptab{font-family:var(--fh);font-weight:500;font-size:.92rem;padding:8px 18px;border-radius:30px;border:1.5px solid var(--line);background:#fff;color:var(--body);cursor:pointer;transition:all var(--t)}
.ptab:hover{border-color:var(--teal);color:var(--teal-700)}
.ptab.is-active{background:var(--teal);border-color:var(--teal);color:#fff}
.path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.pcard:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.pcard__thumb{position:relative;display:block;aspect-ratio:16/9;background:linear-gradient(135deg,var(--navy),#163a63);overflow:hidden}
.pcard__thumb img{width:100%;height:100%;object-fit:cover}
.pcard__ph{position:absolute;inset:0;display:grid;place-items:center;color:rgba(255,255,255,.35)}
.pcard__ph .ph-ic{width:52px;height:52px}
.pcard__lvl{position:absolute;left:12px;top:12px;font-family:var(--fh);font-weight:500;font-size:.74rem;padding:4px 11px;border-radius:30px;color:#fff}
.lvl--1{background:var(--green)}.lvl--2{background:var(--blue)}.lvl--3{background:var(--purple)}
.pcard__body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.pcard__title{font-size:1.1rem;margin:0 0 .35em}
.pcard__title a{color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pcard__title a:hover{color:var(--teal-700)}
.pcard__desc{font-size:.92rem;color:var(--muted);margin:0 0 14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pcard__meta{display:flex;gap:16px;font-size:.84rem;color:var(--body);margin-bottom:14px;margin-top:auto}
.pcard__meta span{display:inline-flex;align-items:center;gap:5px}
.pcard__meta .ic{width:16px;height:16px;color:var(--teal-600)}
.pbar{height:7px;border-radius:30px;background:var(--line-2);overflow:hidden}
.pbar__fill{display:block;height:100%;border-radius:30px;background:linear-gradient(90deg,var(--teal),var(--teal-600));transition:width .4s ease}
.pcard__pct{font-family:var(--fh);font-weight:600;font-size:.8rem;color:var(--teal-700);margin-top:7px;text-align:right}
/* single path */
.path-head{display:flex;gap:10px;margin-bottom:12px}
.path-head__meta{display:flex;gap:18px;margin-top:16px;color:#cdd9e8;font-size:.95rem}
.path-head__meta span{display:inline-flex;align-items:center;gap:6px}
.path-head__meta .ic{width:18px;height:18px}
.path-progress{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);margin-bottom:28px}
.path-progress__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.path-progress__top strong{font-family:var(--fh);color:var(--ink)}
.path-progress__pct{font-family:var(--fh);font-weight:700;font-size:1.3rem;color:var(--teal-600)}
.pbar--lg{height:11px}
.path-progress__note{margin:14px 0 0;font-size:.9rem;color:var(--muted);display:flex;align-items:center;gap:7px}
.path-progress__note .ic{width:17px;height:17px;color:var(--teal-600);flex:none}
.path-intro{margin-bottom:28px}
.lessons{list-style:none;counter-reset:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.lesson{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;transition:border-color var(--t),box-shadow var(--t)}
.lesson:hover{border-color:var(--teal);box-shadow:var(--shadow)}
.lesson__check{flex:none;width:30px;height:30px;border-radius:50%;border:2px solid var(--line);background:#fff;color:transparent;display:grid;place-items:center;cursor:pointer;padding:0;transition:all var(--t)}
.lesson__check:hover{border-color:var(--teal)}
.lesson.is-done .lesson__check{background:var(--teal);border-color:var(--teal);color:#fff}
.lesson__no{flex:none;font-family:var(--fh);font-weight:600;color:var(--faint);width:22px;text-align:center}
.lesson.is-done .lesson__no{color:var(--teal-600)}
.lesson__main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.lesson__title{font-family:var(--fh);font-weight:500;color:var(--ink)}
a.lesson__title:hover{color:var(--teal-700)}
.lesson.is-done .lesson__title{color:var(--muted);text-decoration:line-through}
.lesson__mins{font-size:.8rem;color:var(--muted);display:inline-flex;align-items:center;gap:5px}
.lesson__mins .ic{width:14px;height:14px}
.lesson__go{flex:none;color:var(--faint);display:grid;place-items:center}
.lesson__go:hover{color:var(--teal-600)}
.lesson__go .ic{width:20px;height:20px}
.path-back{margin-top:30px}
.path-back a{display:inline-flex;align-items:center;gap:7px;font-family:var(--fh);font-weight:500}
.ic--flip{transform:rotate(180deg)}
.muted{color:var(--muted)}
/* Categories index */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.topic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.topic-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:transparent}
.topic-card__ic{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;margin-bottom:18px;color:#fff}
.topic-card__ic svg{width:30px;height:30px}
.topic-card h3{font-size:1.25rem;margin-bottom:.3em}
.topic-card__desc{color:var(--muted);font-size:.95rem;margin:0 0 18px;flex:1}
.topic-card__foot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line-2);padding-top:14px}
.topic-card__count{font-family:var(--fh);font-weight:600;color:var(--ink);font-size:.9rem}
.topic-card__more{font-family:var(--fh);font-weight:500;color:var(--teal-600);font-size:.9rem;display:inline-flex;align-items:center;gap:5px}
.topic-card__more .ic{width:16px;height:16px}
@media(max-width:980px){.path-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:860px){.topic-grid{grid-template-columns:1fr}}
@media(max-width:600px){.path-grid{grid-template-columns:1fr}.path-head__meta{flex-wrap:wrap;gap:10px 18px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}