/* =========================================================
   KiTuDacBiet.ORG — theme học thuật (vanilla, no bootstrap/jquery)
   ========================================================= */

:root{
  --ink:#0f172a; --ink2:#1e293b;
  --indigo:#4f46e5; --indigo-d:#4338ca; --indigo-l:#eef2ff; --indigo-bd:#c7d2fe;
  --cyan:#06b6d4; --cyan-l:#67e8f9; --teal:#0891b2;
  --t1:#334155; --t2:#475569; --t3:#64748b; --t4:#94a3b8;
  --bd:#e5e7eb; --bd2:#eef2f7; --bd3:#f1f5f9;
  --bg-soft:#f8fafc; --bg-soft2:#fcfcfb; --bg-soft3:#fafbfc;
  --max:1180px;
  --mono:'Roboto Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Roboto',system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;line-height:1.5}
::selection{background:var(--indigo);color:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
::-webkit-scrollbar{height:8px;width:8px}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:8px}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,12px)}to{opacity:1;transform:translate(-50%,0)}}

.wrap{max-width:var(--max);margin:0 auto;padding-left:24px;padding-right:24px}
.mono{font-family:var(--mono)}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;z-index:200;background:#fff;padding:10px 16px;border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.2)}

/* ============ TOP UTILITY BAR ============ */
.topbar{background:var(--ink);color:#cbd5e1;font-size:12.5px}
.topbar .wrap{padding-top:7px;padding-bottom:7px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.topbar .live{display:flex;align-items:center;gap:8px}
.topbar .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);display:inline-block}
.topbar .meta{display:flex;align-items:center;gap:18px;font-family:var(--mono);font-size:11.5px;letter-spacing:.02em}
.topbar .meta .sep{opacity:.5}

/* ============ HEADER ============ */
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--bd)}
.hbar{height:64px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand .logo{width:38px;height:38px;border-radius:9px;background:var(--indigo);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:900;color:#fff;font-family:var(--mono);box-shadow:0 2px 8px rgba(79,70,229,.3)}
.brand .name{line-height:1.1}
.brand .name b{display:block;font-weight:700;font-size:16px;letter-spacing:-.01em}
.brand .name b i{color:var(--indigo);font-style:normal}
.brand .name small{display:block;font-size:11px;color:var(--t3);font-weight:400}
.mainnav{display:flex;align-items:center;gap:3px;margin-left:auto}
.mainnav ul{display:flex;align-items:center;gap:3px;list-style:none}
.mainnav li{list-style:none}
.mainnav a{display:block;padding:9px 13px;font-size:14px;font-weight:500;color:var(--t1);border-radius:7px;transition:background .12s,color .12s}
.mainnav a:hover,.mainnav a.current,.mainnav .current-menu-item>a,.mainnav .current_page_item>a{background:var(--bg-soft);color:var(--indigo)}
.ctabtn{flex-shrink:0;padding:9px 18px;background:var(--indigo);color:#fff;font-size:14px;font-weight:500;border-radius:8px;box-shadow:0 1px 2px rgba(15,23,42,.15);transition:background .12s}
.ctabtn:hover{background:var(--indigo-d)}
.hambtn{display:none;margin-left:auto;width:42px;height:42px;border-radius:9px;border:1px solid var(--bd);align-items:center;justify-content:center;font-size:20px;color:var(--ink)}
.mobnav{border-top:1px solid var(--bd);background:#fff;padding:8px 16px 14px;display:none;flex-direction:column}
.mobnav.open{display:flex}
.mobnav ul{list-style:none;display:flex;flex-direction:column}
.mobnav li{list-style:none}
.mobnav a{display:block;padding:12px 8px;font-size:15px;font-weight:500;color:var(--t1);border-bottom:1px solid var(--bd3)}

/* ============ buttons / links util ============ */
.btn-dark{display:inline-block;padding:12px 24px;background:var(--ink);color:#fff;font-size:14.5px;font-weight:500;border-radius:6px;transition:background .12s}
.btn-dark:hover{background:var(--ink2)}
.btn-indigo{display:inline-block;padding:11px 20px;background:var(--indigo);color:#fff;font-size:14px;font-weight:500;border-radius:8px;transition:background .12s}
.btn-indigo:hover{background:var(--indigo-d)}
.btn-ghost{display:inline-block;padding:11px 20px;border:1px solid #cbd5e1;color:var(--ink);font-size:14px;font-weight:500;border-radius:8px;transition:border-color .12s,color .12s}
.btn-ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.link-indigo{color:var(--indigo);font-weight:500;transition:color .12s}
.link-indigo:hover{color:var(--indigo-d)}
.link-more{font-size:14.5px;font-weight:500;color:var(--indigo);border-bottom:1px solid var(--indigo-bd);padding-bottom:2px;transition:border-color .12s}
.link-more:hover{border-bottom-color:var(--indigo)}
.section-eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--indigo);letter-spacing:.08em;text-transform:uppercase}

/* ============ HERO ============ */
.hero{background:var(--bg-soft2);border-bottom:1px solid var(--bd)}
.hero-rule{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--bd2);flex-wrap:wrap;gap:8px}
.hero-rule span{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--t2)}
.hero-rule span.dim{color:var(--t4)}
.herogrid{padding-top:48px;padding-bottom:56px;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:start}
.hero-tag{font-family:var(--mono);font-size:12.5px;color:var(--indigo);letter-spacing:.03em;margin-bottom:20px}
.hero h1{font-size:43px;line-height:1.13;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.hero h1 .u{border-bottom:3px solid var(--indigo);padding-bottom:2px}
.hero-lead{margin-top:24px;font-size:16px;line-height:1.78;color:var(--t1);border-left:2px solid #cbd5e1;padding-left:20px;max-width:540px}
.hero-lead strong{font-weight:700;color:var(--ink)}
.hero-facts{margin-top:28px;border-top:1px solid var(--bd);max-width:540px}
.hero-facts .row{display:flex;gap:22px;padding:13px 0;border-bottom:1px solid var(--bd)}
.hero-facts .k{font-family:var(--mono);font-size:11.5px;color:var(--t4);width:104px;flex-shrink:0;padding-top:2px;letter-spacing:.03em}
.hero-facts .v{font-size:14px;color:var(--ink);line-height:1.5}
.hero-cta{margin-top:28px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}

.specimen{border:1px solid var(--bd);border-radius:8px;overflow:hidden;background:#fff}
.specimen .head{padding:13px 18px;border-bottom:1px solid var(--bd);display:flex;align-items:center;justify-content:space-between}
.specimen .head b{font-size:13px;font-weight:700;color:var(--ink)}
.specimen .head .mono{font-size:10.5px;color:var(--t4)}
.specimen .crow{width:100%;text-align:left;display:flex;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid var(--bd3);background:#fff;transition:background .1s}
.specimen .crow:hover{background:var(--bg-soft)}
.specimen .crow .ch{font-size:22px;width:34px;text-align:center;flex-shrink:0}
.specimen .crow .cp{font-family:var(--mono);font-size:11px;color:var(--t3);width:80px;flex-shrink:0}
.specimen .crow .nm{font-size:12.5px;color:var(--t1);flex:1;line-height:1.35}
.specimen .crow .st{font-size:11px;font-weight:500;flex-shrink:0}
.specimen .foot{padding:11px 18px;background:var(--bg-soft3);font-size:11px;color:var(--t4);font-family:var(--mono);display:flex;align-items:center;justify-content:space-between}

/* ============ generic section heads ============ */
.sec{padding-top:64px;padding-bottom:8px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.sec-head h2{margin-top:8px;font-size:32px;font-weight:900;letter-spacing:-.02em}
.sec-head p{font-size:14px;color:var(--t3);max-width:320px}

/* ============ TOOLS GRID ============ */
.toolsgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tool-card{display:block;background:#fff;border:1px solid var(--bd);border-radius:14px;padding:24px 22px;transition:box-shadow .15s,border-color .15s}
.tool-card:hover{border-color:var(--indigo-bd);box-shadow:0 14px 30px -16px rgba(79,70,229,.4)}
.tool-card .ic{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.tool-card .ti{font-size:17px;font-weight:700;letter-spacing:-.01em}
.tool-card .de{margin-top:7px;font-size:13.5px;line-height:1.55;color:var(--t3)}
.tool-card .kw{margin-top:16px;font-family:var(--mono);font-size:11.5px;color:var(--t4)}

/* ============ FONT CONVERTER ============ */
.conv{padding-top:56px;padding-bottom:56px}
.conv-box{background:var(--ink);border-radius:20px;padding:40px;display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:start}
.conv-box .eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--cyan-l);letter-spacing:.08em;text-transform:uppercase}
.conv-box h2{margin-top:12px;font-size:30px;font-weight:900;color:#fff;letter-spacing:-.02em;line-height:1.12}
.conv-box p{margin-top:16px;font-size:14.5px;line-height:1.6;color:var(--t4)}
.conv-input{margin-top:22px;width:100%;padding:13px 16px;background:var(--ink2);border:1px solid #334155;border-radius:10px;color:#fff;font-size:15px;outline:none;transition:border-color .12s}
.conv-input:focus{border-color:var(--cyan)}
.conv-hint{margin-top:10px;font-size:12px;color:var(--t3)}
.conv-list{display:flex;flex-direction:column;gap:9px;max-height:340px;overflow-y:auto;padding-right:4px}
.font-row{text-align:left;display:flex;align-items:center;justify-content:space-between;gap:14px;background:var(--ink2);border:1px solid #2b3a52;border-radius:11px;padding:12px 16px;transition:background .12s,border-color .12s}
.font-row:hover{background:#283549;border-color:var(--cyan)}
.font-row .val{font-size:19px;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.font-row .meta{flex-shrink:0;display:flex;align-items:center;gap:10px}
.font-row .nm{font-family:var(--mono);font-size:11px;color:var(--t3)}
.font-row .cp{font-size:11px;font-weight:500;color:var(--cyan)}

/* ============ GAME CLUSTERS ============ */
.games{padding-top:8px;padding-bottom:56px}
.game-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.game-tab{padding:9px 16px;border-radius:9px;font-size:13.5px;font-weight:500;transition:all .12s;background:#fff;color:var(--t2);border:1px solid var(--bd)}
.game-tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.game-panel{background:#fff;border:1px solid var(--bd);border-radius:16px;overflow:hidden}
.game-panel .ph{padding:20px 24px;border-bottom:1px solid var(--bd3);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.game-panel .pinfo{display:flex;align-items:center;gap:13px}
.game-panel .pic{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px}
.game-panel .pname{font-size:17px;font-weight:700}
.game-panel .pkw{font-size:12.5px;color:var(--t3)}
.badge-ok{display:inline-flex;align-items:center;gap:7px;padding:6px 12px;background:#ecfdf5;border:1px solid #d1fae5;border-radius:999px;font-size:12px;font-weight:500;color:#047857}
.badge-ok .d{width:6px;height:6px;border-radius:50%;background:#10b981}
.gamegrid{padding:18px 24px;display:grid;grid-template-columns:repeat(8,1fr);gap:9px}
.glyph-btn{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:20px;background:var(--bg-soft);border:1px solid var(--bd2);border-radius:9px;color:var(--ink);transition:all .12s}
.glyph-btn:hover{background:var(--indigo-l);border-color:var(--indigo-bd);transform:translateY(-2px)}
.game-note{padding:14px 24px;background:#fffbeb;border-top:1px solid #fef3c7;font-size:12.5px;color:#92400e;display:flex;align-items:flex-start;gap:9px}

/* ============ COMPAT TABLE ============ */
.band{background:var(--bg-soft);border-top:1px solid var(--bd2);border-bottom:1px solid var(--bd2)}
.band .wrap{padding-top:56px;padding-bottom:56px}
.compat-wrap{background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;overflow-x:auto}
table.compat{width:100%;border-collapse:collapse;min-width:680px;font-size:13.5px}
table.compat thead tr{background:var(--ink);color:#fff}
table.compat th{padding:13px 10px;font-weight:500;font-size:12.5px;text-align:center}
table.compat th:first-child{text-align:left;padding:13px 18px}
table.compat tbody tr{border-top:1px solid var(--bd3)}
table.compat td{padding:12px 10px;text-align:center;font-weight:700}
table.compat td:first-child{padding:12px 18px;font-weight:500;color:var(--ink);text-align:left}
table.compat td .s{font-size:17px;margin-right:8px}
.legend{margin-top:14px;display:flex;gap:22px;flex-wrap:wrap;font-size:12.5px;color:var(--t3)}
.legend span{display:flex;align-items:center;gap:6px}
.legend .ml{font-family:var(--mono);margin-left:auto}

/* ============ E-E-A-T ============ */
.eeat{padding-top:64px;padding-bottom:64px}
.eeatgrid{display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:center}
.eeat h2{margin-top:10px;font-size:32px;font-weight:900;letter-spacing:-.02em;line-height:1.12}
.eeat .lead{margin-top:16px;font-size:15px;line-height:1.65;color:var(--t2)}
.eeat .byline{margin-top:24px;display:flex;flex-direction:column;gap:2px;border-left:3px solid var(--indigo);padding-left:18px}
.eeat .byline b{font-size:14px;font-weight:700;color:var(--ink)}
.eeat .byline small{font-size:13px;color:var(--t3)}
.eeat .acts{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}
.trust-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.trust-card{background:#fff;border:1px solid var(--bd);border-radius:14px;padding:22px}
.trust-card .ic{width:42px;height:42px;border-radius:10px;background:var(--indigo-l);display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:14px}
.trust-card b{font-size:15px;font-weight:700;letter-spacing:-.01em}
.trust-card p{margin-top:6px;font-size:13px;line-height:1.55;color:var(--t3)}

.orgbox{margin-top:44px;background:var(--ink);border-radius:18px;padding:34px 36px;display:grid;grid-template-columns:1.15fr 1fr;gap:36px;align-items:center}
.orgbox .who{display:flex;gap:20px;align-items:flex-start}
.orgbox .klogo{width:60px;height:60px;border-radius:14px;background:var(--indigo);display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:900;color:#fff;font-family:var(--mono);flex-shrink:0;box-shadow:0 6px 18px rgba(79,70,229,.4)}
.org-chip{display:inline-flex;align-items:center;gap:7px;padding:4px 11px;background:var(--ink2);border:1px solid #334155;border-radius:999px;font-size:11.5px;font-weight:500;color:var(--cyan-l);margin-bottom:10px}
.org-chip .d{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.orgbox .who b.t{font-size:19px;font-weight:700;color:#fff;letter-spacing:-.01em}
.orgbox .who p{margin-top:8px;font-size:13.5px;line-height:1.6;color:var(--t4);max-width:360px}
.orgbox .who .acts{margin-top:16px;display:flex;gap:9px;flex-wrap:wrap}
.org-btn{padding:9px 16px;background:var(--indigo);color:#fff;font-size:13px;font-weight:500;border-radius:8px;transition:background .12s}
.org-btn:hover{background:var(--indigo-d)}
.org-btn2{padding:9px 16px;background:var(--ink2);border:1px solid #334155;color:#e2e8f0;font-size:13px;font-weight:500;border-radius:8px;transition:border-color .12s}
.org-btn2:hover{border-color:var(--cyan)}
.org-facts{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--ink2);border:1px solid var(--ink2);border-radius:12px;overflow:hidden}
.org-facts .f{background:var(--ink);padding:18px 20px}
.org-facts .num{font-size:22px;font-weight:900;color:#fff;letter-spacing:-.02em}
.org-facts .lb{margin-top:3px;font-size:12px;color:var(--t4);line-height:1.4}

/* ============ ARTICLE CARDS ============ */
.articlegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.art-card{display:block;background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;transition:box-shadow .15s,transform .15s}
.art-card:hover{box-shadow:0 14px 30px -18px rgba(15,23,42,.3);transform:translateY(-2px)}
.art-thumb{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative;background:repeating-linear-gradient(135deg,#eef2f7 0 14px,#f8fafc 14px 28px)}
.art-thumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.art-thumb .g{font-size:46px;opacity:.5}
.art-thumb .tag{position:absolute;top:12px;left:12px;font-family:var(--mono);font-size:10.5px;color:var(--t4);background:#fff;padding:3px 8px;border-radius:5px;border:1px solid var(--bd2)}
.art-body{padding:18px 20px 22px}
.art-body .ti{font-size:16px;font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--ink)}
.art-body .ex{margin-top:9px;font-size:13px;line-height:1.55;color:var(--t3)}
.art-body .mt{margin-top:14px;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--t4)}

/* ============ CTA STRIP ============ */
.cta{background:var(--indigo)}
.cta .wrap{padding-top:44px;padding-bottom:44px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta h2{font-size:25px;font-weight:900;color:#fff;letter-spacing:-.02em}
.cta p{margin-top:6px;font-size:14.5px;color:var(--indigo-bd)}
.cta-btn{padding:14px 28px;background:#fff;color:var(--indigo);font-size:15px;font-weight:700;border-radius:10px;transition:background .12s}
.cta-btn:hover{background:var(--indigo-l)}

/* ============ FOOTER ============ */
.site-footer{background:#fff;border-top:1px solid var(--bd)}
.footgrid{padding-top:48px;padding-bottom:0;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footbrand .top{display:flex;align-items:center;gap:10px}
.footbrand .top .logo{width:34px;height:34px;border-radius:8px;background:var(--indigo);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:900;color:#fff;font-family:var(--mono)}
.footbrand .top b{font-weight:700;font-size:15px}
.footbrand .top b i{color:var(--indigo);font-style:normal}
.footbrand p{margin-top:14px;font-size:13px;line-height:1.6;color:var(--t3);max-width:280px}
.footcol .ct{font-size:13px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footcol .links{display:flex;flex-direction:column;gap:10px}
.footcol .links a{font-size:13.5px;color:var(--t3);transition:color .12s}
.footcol .links a:hover{color:var(--indigo)}
.foot-disc{padding:24px;margin-top:32px;border-top:1px solid var(--bd3)}
.foot-disc p{font-size:12px;line-height:1.6;color:var(--t4)}
.foot-disc strong{color:var(--t3);font-weight:500}
.foot-bottom{border-top:1px solid var(--bd3);background:var(--bg-soft3)}
.foot-bottom .wrap{padding-top:16px;padding-bottom:16px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-bottom .cp{font-size:12.5px;color:var(--t4)}
.foot-bottom .ln{display:flex;gap:20px;flex-wrap:wrap}
.foot-bottom .ln a{font-size:12.5px;color:var(--t3);transition:color .12s}
.foot-bottom .ln a:hover{color:var(--indigo)}

/* ============ PAGE HERO (archive/single) ============ */
.page-hero{background:linear-gradient(180deg,var(--bg-soft) 0%,#fff 100%);border-bottom:1px solid var(--bd2)}
.page-hero .wrap{padding-top:36px;padding-bottom:40px}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px;flex-wrap:wrap}
.crumbs a{color:var(--t3);transition:color .12s}
.crumbs a:hover{color:var(--indigo)}
.crumbs .sep{color:#cbd5e1}
.crumbs .cur{color:var(--ink);font-weight:500}
.page-hero .top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.page-hero h1{font-size:40px;line-height:1.08;font-weight:900;letter-spacing:-.025em}
.page-hero .sub{margin-top:14px;font-size:16px;line-height:1.6;color:var(--t2);max-width:620px}
.searchbox{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--bd);border-radius:11px;padding:4px 4px 4px 16px;min-width:280px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.searchbox .ic{color:var(--t4);font-size:16px}
.searchbox input{flex:1;border:none;outline:none;font-size:14px;background:transparent;padding:9px 0}
.searchbox button{padding:9px 16px;background:var(--indigo);color:#fff;font-size:13.5px;font-weight:500;border-radius:8px;transition:background .12s}
.searchbox button:hover{background:var(--indigo-d)}

/* category chips */
.chipbar{border-bottom:1px solid var(--bd2);background:#fff;position:sticky;top:64px;z-index:30}
.chipbar .wrap{padding-top:14px;padding-bottom:14px;display:flex;gap:9px;overflow-x:auto}
.chip{flex-shrink:0;padding:8px 15px;border-radius:999px;font-size:13.5px;font-weight:500;transition:all .12s;background:var(--bd3);color:var(--t2)}
.chip:hover{background:var(--indigo-l);color:var(--indigo)}
.chip.active{background:var(--ink);color:#fff}

/* ============ ARCHIVE LAYOUT ============ */
.listgrid{padding-top:40px;padding-bottom:64px;display:grid;grid-template-columns:1fr 320px;gap:44px}
.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:0;border:1px solid var(--bd);border-radius:16px;overflow:hidden;margin-bottom:34px;transition:box-shadow .15s}
.feature:hover{box-shadow:0 18px 40px -20px rgba(15,23,42,.3)}
.feature .img{aspect-ratio:16/10;background:repeating-linear-gradient(135deg,#e0e7ff 0 16px,#eef2ff 16px 32px);display:flex;align-items:center;justify-content:center;position:relative}
.feature .img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.feature .img .g{font-size:64px;opacity:.55;font-family:var(--mono)}
.feature .img .badge{position:absolute;top:14px;left:14px;font-family:var(--mono);font-size:11px;color:var(--indigo);background:#fff;padding:4px 10px;border-radius:6px;font-weight:500}
.feature .body{padding:28px 30px;display:flex;flex-direction:column;justify-content:center}
.feature .body .kicker{font-family:var(--mono);font-size:11px;color:var(--teal);font-weight:500;letter-spacing:.04em}
.feature .body h2{margin-top:10px;font-size:24px;font-weight:900;line-height:1.2;letter-spacing:-.02em}
.feature .body p{margin-top:12px;font-size:14px;line-height:1.6;color:var(--t3)}
.feature .body .mt{margin-top:18px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--t4)}

.cardgrid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.post-card{display:block;background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;transition:box-shadow .15s,transform .15s}
.post-card:hover{box-shadow:0 14px 30px -18px rgba(15,23,42,.28);transform:translateY(-2px)}
.post-card .img{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative;background:repeating-linear-gradient(135deg,#eef2f7 0 14px,#f8fafc 14px 28px)}
.post-card .img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.post-card .img .g{font-size:40px;opacity:.6}
.post-card .img .tag{position:absolute;top:11px;left:11px;font-family:var(--mono);font-size:10px;color:var(--t2);background:#fff;padding:3px 8px;border-radius:5px;font-weight:500}
.post-card .body{padding:16px 18px 20px}
.post-card .body .ti{font-size:15.5px;font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--ink)}
.post-card .body .ex{margin-top:8px;font-size:12.5px;line-height:1.5;color:var(--t3)}
.post-card .body .mt{margin-top:13px;display:flex;align-items:center;gap:7px;font-size:11.5px;color:var(--t4)}

/* pagination */
.pager{margin-top:38px;display:flex;align-items:center;justify-content:center;gap:7px;flex-wrap:wrap}
.pager a,.pager span{min-width:40px;height:40px;padding:0 10px;border-radius:9px;font-size:14px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--ink);border:1px solid var(--bd);transition:border-color .12s,color .12s}
.pager a:hover{border-color:var(--indigo);color:var(--indigo)}
.pager .current{background:var(--indigo);color:#fff;border-color:var(--indigo)}
.pager .dots{border:none;background:none}

/* sidebar */
.sidebar{display:flex;flex-direction:column;gap:22px}
.swidget{background:#fff;border:1px solid var(--bd);border-radius:14px;padding:22px}
.swidget .h{font-size:14px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.swidget .h .i{color:var(--indigo)}
.swidget .h .c{color:var(--cyan)}
.tool-link{display:flex;align-items:center;gap:10px;padding:10px;border-radius:9px;transition:background .12s}
.tool-link:hover{background:var(--bg-soft)}
.tool-link .ic{width:34px;height:34px;border-radius:8px;background:var(--indigo-l);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.tool-link .nm{display:block;font-size:13.5px;font-weight:500;color:var(--ink)}
.tool-link .vol{display:block;font-size:11.5px;color:var(--t4);font-family:var(--mono)}
.topics{display:flex;flex-wrap:wrap;gap:8px}
.topics a{padding:6px 12px;background:var(--bd3);border-radius:999px;font-size:12.5px;color:var(--t2);font-weight:500;transition:all .12s}
.topics a:hover{background:var(--indigo-l);color:var(--indigo)}
.newsletter{background:var(--ink);border-radius:14px;padding:24px;color:#fff}
.newsletter b{font-size:15px;font-weight:700}
.newsletter p{margin-top:8px;font-size:12.5px;line-height:1.55;color:var(--t4)}
.newsletter input{margin-top:14px;width:100%;padding:11px 14px;background:var(--ink2);border:1px solid #334155;border-radius:9px;color:#fff;font-size:13px;outline:none}
.newsletter button{margin-top:9px;width:100%;padding:11px;background:var(--indigo);color:#fff;font-size:13.5px;font-weight:500;border-radius:9px;transition:background .12s}
.newsletter button:hover{background:var(--indigo-d)}

/* ============ SINGLE ARTICLE ============ */
.art-head{max-width:820px;margin:0 auto;padding:34px 24px 0}
.art-meta-tags{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.tag-cat{font-family:var(--mono);font-size:11.5px;color:var(--teal);font-weight:500;letter-spacing:.05em;background:#ecfeff;padding:5px 11px;border-radius:6px}
.tag-verified{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;color:#047857;background:#ecfdf5;border:1px solid #d1fae5;padding:5px 11px;border-radius:999px}
.tag-verified .d{width:6px;height:6px;border-radius:50%;background:#10b981}
.art-head h1{font-size:38px;line-height:1.13;font-weight:900;letter-spacing:-.025em}
.art-head .dek{margin-top:16px;font-size:17.5px;line-height:1.65;color:var(--t2)}
.art-byline{margin-top:24px;padding:18px 0;border-top:1px solid var(--bd2);border-bottom:1px solid var(--bd2);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.art-byline .who{display:flex;align-items:center;gap:12px}
.art-byline .av{width:44px;height:44px;border-radius:50%;background:var(--indigo);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:900;color:#fff;font-family:var(--mono);overflow:hidden}
.art-byline .av img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.art-byline .nm{font-size:14px;font-weight:700}
.art-byline .dt{font-size:12.5px;color:var(--t4)}
.share{display:flex;gap:8px}
.share button{width:40px;height:40px;border-radius:9px;border:1px solid var(--bd);display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--t2);transition:border-color .12s,color .12s}
.share button:hover{border-color:var(--indigo);color:var(--indigo)}

.art-feat{max-width:820px;margin:28px auto 0;padding:0 24px}
.art-feat .box{aspect-ratio:16/8;border-radius:16px;background:repeating-linear-gradient(135deg,#e0e7ff 0 18px,#eef2ff 18px 36px);display:flex;align-items:center;justify-content:center;position:relative;border:1px solid #e0e7ff;overflow:hidden}
.art-feat .box img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.art-feat .box .g{font-size:60px;opacity:.6;font-family:var(--mono)}

.artgrid{max-width:1080px;margin:0 auto;padding:40px 24px 60px;display:grid;grid-template-columns:1fr 240px;gap:48px}
.prose{max-width:660px;justify-self:center;width:100%}
.prose p{font-size:16.5px;line-height:1.78;color:var(--t1);margin:0 0 18px}
.prose h2{font-size:25px;font-weight:900;letter-spacing:-.02em;margin:42px 0 16px;scroll-margin-top:140px}
.prose h3{font-size:19px;font-weight:700;margin:28px 0 12px;scroll-margin-top:140px}
.prose h4{font-size:16px;font-weight:700;margin:22px 0 10px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:24px}
.prose li{font-size:16.5px;line-height:1.78;color:var(--t1);margin-bottom:8px}
.prose strong{color:var(--ink);font-weight:700}
.prose blockquote{border-left:3px solid var(--indigo);padding:6px 0 6px 18px;margin:0 0 18px;color:var(--t2);font-style:italic}
.prose a{color:var(--indigo);font-weight:500;border-bottom:1px solid var(--indigo-bd);transition:border-color .12s}
.prose a:hover{border-bottom-color:var(--indigo)}
.prose img{border-radius:12px;margin:6px 0 22px}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--bg-soft);padding:2px 6px;border-radius:5px}
.prose pre{background:var(--ink);color:#e2e8f0;padding:16px;border-radius:12px;overflow-x:auto;margin:0 0 22px}
.prose pre code{background:none;padding:0;color:inherit}
.prose table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:14px}
.prose th,.prose td{border:1px solid var(--bd);padding:10px 12px;text-align:left}
.prose th{background:var(--bg-soft)}
.prose .callout{background:#eff6ff;border:1px solid #dbeafe;border-radius:12px;padding:16px 18px;margin:0 0 26px;font-size:14px;line-height:1.6;color:#1e40af}
.prose .callout strong{color:#1e3a8a}
.prose .dek-lead{font-size:18px;line-height:1.7;color:var(--t2)}
.prose figure{margin:0 0 24px}
.prose figure img{margin:0 0 8px}
.prose figcaption{font-size:13px;color:var(--t4);text-align:center;line-height:1.5}
.prose .note-small{font-size:13.5px;line-height:1.6;color:var(--t3);background:var(--bg-soft);border-left:3px solid #cbd5e1;padding:10px 14px;border-radius:0 8px 8px 0}
.prose .byline-foot{font-size:13.5px;color:var(--t3);border-top:1px solid var(--bd2);padding-top:18px;margin-top:8px}
.prose .compat-table-wrap{overflow-x:auto;margin:0 0 12px}
.prose .toc-box{background:var(--bg-soft);border:1px solid var(--bd2);border-radius:14px;padding:18px 22px;margin:0 0 28px}
.prose .toc-box .toc-title{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--t4);margin-bottom:10px}
.prose .toc-box ol{margin:0;padding-left:20px}
.prose .toc-box li{font-size:14.5px;line-height:1.5;margin-bottom:6px;color:var(--t1)}
.prose .toc-box a{border-bottom:none;color:var(--t1);font-weight:500}
.prose .toc-box a:hover{color:var(--indigo)}

/* TOC */
.toc{position:relative}
.toc .stick{position:sticky;top:120px;display:flex;flex-direction:column;gap:22px}
.toc .lbl{font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--t4);text-transform:uppercase;margin-bottom:13px}
.toc .list{display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--bd2)}
.toc .list a{padding:7px 0 7px 14px;margin-left:-2px;font-size:13.5px;line-height:1.4;color:var(--t3);border-left:2px solid transparent;transition:color .12s,border-color .12s}
.toc .list a:hover,.toc .list a.active{color:var(--indigo);border-left-color:var(--indigo)}
.toc .cta-card{background:var(--bg-soft);border:1px solid var(--bd2);border-radius:12px;padding:16px}
.toc .cta-card b{font-size:13px;font-weight:700;display:block;margin-bottom:6px}
.toc .cta-card p{font-size:12.5px;line-height:1.5;color:var(--t3);margin-bottom:12px}
.toc .cta-card a{display:block;text-align:center;padding:9px;background:var(--indigo);color:#fff;font-size:13px;font-weight:500;border-radius:8px;transition:background .12s}
.toc .cta-card a:hover{background:var(--indigo-d)}

/* author org box (single) */
.authorbox-wrap{max-width:820px;margin:0 auto;padding:0 24px 12px}
.authorbox{background:var(--ink);border-radius:16px;padding:28px 30px;display:flex;gap:20px;align-items:flex-start;flex-wrap:wrap}
.authorbox .av{width:56px;height:56px;border-radius:12px;background:var(--indigo);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:900;color:#fff;font-family:var(--mono);flex-shrink:0;overflow:hidden}
.authorbox .av img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.authorbox .b{flex:1;min-width:240px}
.authorbox .b b{font-size:16px;font-weight:700;color:#fff}
.authorbox .b p{margin-top:8px;font-size:13.5px;line-height:1.6;color:var(--t4)}
.authorbox .b .acts{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}

.related{background:var(--bg-soft);border-top:1px solid var(--bd2);margin-top:48px}
.related .wrap{max-width:1080px;padding-top:48px;padding-bottom:56px}
.related h2{font-size:24px;font-weight:900;letter-spacing:-.02em;margin-bottom:24px}
.relgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rel-card{display:block;background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;transition:box-shadow .15s}
.rel-card:hover{box-shadow:0 14px 30px -18px rgba(15,23,42,.28)}
.rel-card .img{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative;background:repeating-linear-gradient(135deg,#eef2f7 0 14px,#f8fafc 14px 28px)}
.rel-card .img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.rel-card .img .g{font-size:38px;opacity:.6}
.rel-card .body{padding:16px 18px 20px}
.rel-card .body .tag{font-family:var(--mono);font-size:10.5px;color:var(--t4);margin-bottom:8px}
.rel-card .body .ti{font-size:15px;font-weight:700;line-height:1.35;color:var(--ink)}

/* char copy tool inside article */
.copytool{border:1px solid var(--bd);border-radius:14px;overflow:hidden;margin:6px 0 26px}
.copytool .h{padding:13px 16px;background:var(--bg-soft);border-bottom:1px solid var(--bd2);display:flex;align-items:center;gap:10px}
.copytool .h b{font-size:13px;font-weight:700;flex:1}
.copytool .h .c{font-family:var(--mono);font-size:11px;color:var(--t4)}
.charpanel{padding:14px;display:grid;grid-template-columns:repeat(8,1fr);gap:8px}
.charpanel .glyph-btn{background:#fff}
.copytool .warn{padding:11px 16px;background:#fffbeb;border-top:1px solid #fef3c7;font-size:12.5px;line-height:1.5;color:#92400e}
.chiprow{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px}
.chiprow .glyph-btn{aspect-ratio:auto;min-width:42px;height:42px;padding:0 10px;font-size:19px}

/* ============ 404 / generic page ============ */
.page-wrap{max-width:820px;margin:0 auto;padding:48px 24px 64px}
.page-wrap .ph{margin-bottom:24px}
.page-wrap h1{font-size:34px;font-weight:900;letter-spacing:-.02em;margin-bottom:8px}
.e404{max-width:720px;margin:0 auto;padding:80px 24px;text-align:center}
.e404 .big{font-family:var(--mono);font-size:96px;font-weight:500;color:var(--indigo);line-height:1}
.e404 .gl{font-size:40px;opacity:.5;margin:8px 0}
.e404 h1{font-size:30px;font-weight:900;letter-spacing:-.02em;margin-top:10px}
.e404 p{margin-top:14px;font-size:15px;line-height:1.7;color:var(--t2)}
.e404 .acts{margin-top:26px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* comments */
.comments{max-width:820px;margin:0 auto;padding:0 24px 56px}
.comments h2{font-size:22px;font-weight:900;letter-spacing:-.02em;margin-bottom:20px}
.comments ol{list-style:none}
.comments .comment{border:1px solid var(--bd);border-radius:12px;padding:16px 18px;margin-bottom:14px}
.comments .comment .au{font-weight:700;font-size:14px}
.comments .comment .dt{font-size:12px;color:var(--t4);margin-bottom:8px}
.comments .comment p{font-size:14.5px;line-height:1.6;color:var(--t1)}
.comment-respond{margin-top:24px}
.comment-respond input,.comment-respond textarea{width:100%;padding:11px 14px;border:1px solid var(--bd);border-radius:9px;font-size:14px;margin-bottom:12px;outline:none}
.comment-respond input:focus,.comment-respond textarea:focus{border-color:var(--indigo)}
.comment-respond .submit{padding:12px 24px;background:var(--indigo);color:#fff;font-weight:500;border-radius:8px}

/* ============ toast ============ */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%);z-index:90;background:var(--ink);color:#fff;padding:13px 22px;border-radius:11px;font-size:14px;font-weight:500;box-shadow:0 12px 30px -8px rgba(15,23,42,.5);display:flex;align-items:center;gap:11px;animation:toastIn .22s ease;opacity:0;pointer-events:none;visibility:hidden}
.toast.show{opacity:1;visibility:visible}
.toast .ok{width:22px;height:22px;border-radius:50%;background:#10b981;display:flex;align-items:center;justify-content:center;font-size:13px}
.toast .v{font-family:var(--mono);color:var(--cyan-l)}

/* ============ generator (nicknames plugin) — bootstrap-free shim ============ */
.kitudacbiet-org .row{display:flex;flex-wrap:wrap;margin:0 -8px}
.kitudacbiet-org [class*="col-"]{padding:0 8px;flex:1 1 0%;min-width:0}
.kitudacbiet-org .col-12{flex:0 0 100%;max-width:100%}
@media(min-width:768px){
  .kitudacbiet-org .col-md-4{flex:0 0 33.3333%;max-width:33.3333%}
  .kitudacbiet-org .col-md-6{flex:0 0 50%;max-width:50%}
}
.kitudacbiet-org .text-center{text-align:center}
.kitudacbiet-org .my-1{margin-top:.25rem;margin-bottom:.25rem}
.kitudacbiet-org .my-3{margin-top:1rem;margin-bottom:1rem}
.kitudacbiet-org .mb-1{margin-bottom:.25rem}
.kitudacbiet-org .m-0{margin:0}
.kitudacbiet-org .ml-2{margin-left:.5rem}
.kitudacbiet-org .d-inline-block{display:inline-block}
.kitudacbiet-org .pointer{cursor:pointer}
.kitudacbiet-org .form-control{display:block;width:100%;padding:.5rem .9rem;font-size:1rem;line-height:1.5;color:var(--ink);background:#fff;border:1px solid var(--bd);border-radius:10px;outline:none;transition:border-color .12s}
.kitudacbiet-org .form-control:focus{border-color:var(--indigo)}
.kitudacbiet-org .form-control-lg{padding:.65rem 1rem;font-size:1.05rem}
.kitudacbiet-org select.form-control{appearance:auto}
.kitudacbiet-org .btn{display:inline-block;font-weight:500;text-align:center;padding:.55rem 1.1rem;font-size:1rem;border-radius:8px;border:1px solid transparent;transition:background .12s,border-color .12s;cursor:pointer}
.kitudacbiet-org .btn-lg{padding:.7rem 1.4rem;font-size:1.05rem}
.kitudacbiet-org .btn-sm{padding:.35rem .7rem;font-size:.85rem}
.kitudacbiet-org .btn-block{display:block;width:100%}
.kitudacbiet-org .btn-rounded{border-radius:999px}
.kitudacbiet-org .btn-primary{background:var(--indigo);color:#fff}
.kitudacbiet-org .btn-primary:hover{background:var(--indigo-d)}
.kitudacbiet-org .btn-secondary{background:#64748b;color:#fff}
.kitudacbiet-org .btn-warning{background:#f59e0b;color:#fff}
.kitudacbiet-org .btn-warning:hover{background:#d97706}
.kitudacbiet-org .btn-default,.kitudacbiet-org .btn-secondary{background:var(--bg-soft);color:var(--ink);border-color:var(--bd)}
.kitudacbiet-org .badge{display:inline-block;padding:.3em .55em;font-size:.75em;font-weight:700;border-radius:6px;color:#fff;background:var(--indigo)}
.kitudacbiet-org .badge-pill{border-radius:999px}
.kitudacbiet-org .list-group{display:flex;flex-direction:column;padding-left:0;list-style:none;border-radius:10px;overflow:hidden;border:1px solid var(--bd)}
.kitudacbiet-org .list-group-item{padding:.7rem 1rem;background:#fff;border-bottom:1px solid var(--bd3)}
.kitudacbiet-org .one_generated_variant{display:block;padding:8px 12px;background:var(--bg-soft);border:1px solid var(--bd);border-radius:8px;margin:4px 0;font-size:18px;cursor:pointer;transition:background .12s,border-color .12s}
.kitudacbiet-org .one_generated_variant:hover{background:var(--indigo-l);border-color:var(--indigo-bd)}

/* ============ RESPONSIVE ============ */
@media(max-width:960px){
  .mainnav{display:none}
  .ctabtn{display:none}
  .hambtn{display:flex}
  .herogrid,.conv-box,.eeatgrid,.orgbox{grid-template-columns:1fr;gap:36px}
  .toolsgrid,.articlegrid{grid-template-columns:repeat(2,1fr)}
  .footgrid{grid-template-columns:1fr 1fr}
  .gamegrid{grid-template-columns:repeat(6,1fr)}
  .listgrid{grid-template-columns:1fr}
  .feature{grid-template-columns:1fr}
  .cardgrid{grid-template-columns:repeat(2,1fr)}
  .artgrid{grid-template-columns:1fr}
  .toc{display:none}
  .relgrid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .toolsgrid,.articlegrid,.footgrid,.cardgrid{grid-template-columns:1fr}
  .gamegrid{grid-template-columns:repeat(5,1fr)}
  .charpanel{grid-template-columns:repeat(5,1fr)}
  .hero h1{font-size:38px}
  .page-hero h1{font-size:32px}
  .art-head h1{font-size:30px}
  .trust-grid{grid-template-columns:1fr}
}

/* figure ảnh minh hoạ trong trang chủ (pillar) */
.kitu-figure{margin:0 0 26px;border:1px solid var(--bd);border-radius:14px;overflow:hidden;background:var(--bg-soft)}
.kitu-figure img{display:block;width:100%;height:auto}
.kitu-figure figcaption{padding:10px 16px;font-size:12.5px;line-height:1.5;color:var(--t3);border-top:1px solid var(--bd2);background:#fff}

/* mục lục trang chủ (pillar) — lưới chip có số thứ tự */
.home-toc{border:1px solid var(--bd);border-radius:16px;padding:20px 22px 22px 26px;background:linear-gradient(180deg,#fff,var(--bg-soft));position:relative;overflow:hidden}
.home-toc::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--indigo),var(--cyan))}
.home-toc-title{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--t4);margin:0 0 14px}
.home-toc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.home-toc-grid a{display:flex;align-items:center;gap:10px;padding:11px 12px;border:1px solid var(--bd2);border-radius:11px;background:#fff;color:var(--t1);font-size:13.5px;font-weight:500;line-height:1.3;border-bottom:1px solid var(--bd2);transition:transform .14s,border-color .14s,background .14s}
.home-toc-grid a:hover{border-color:var(--indigo-bd);background:var(--indigo-l);transform:translateY(-2px)}
.home-toc-grid .n{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--indigo);background:var(--indigo-l);border-radius:7px;padding:4px 7px;flex:none}
.home-toc-grid a:hover .n{background:#fff}
.home-toc-grid .t{flex:1}
@media(max-width:900px){.home-toc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.home-toc-grid{grid-template-columns:1fr}}

/* hộp công cụ font trong bài (N007) */
.prose .ktdb-fonttool{background:var(--ink);border-radius:16px;padding:22px 22px 24px;margin:0 0 26px}
.prose .ktdb-fonttool label{display:block;font-size:13px;font-weight:600;color:var(--cyan-l);margin-bottom:10px;letter-spacing:.04em;text-transform:uppercase}
.prose .ktdb-fonttool .conv-input{margin-top:0}
.prose .ktdb-fonttool .conv-list{margin-top:14px;max-height:420px}
.prose .ktdb-fonttool .conv-hint{margin-top:12px;color:var(--t3)}
.prose .compat{width:100%;border-collapse:collapse;font-size:14px;margin:0 0 8px}
.prose .compat th,.prose .compat td{border:1px solid var(--bd);padding:9px 10px;text-align:center}
.prose .compat th:first-child,.prose .compat td:first-child{text-align:left}
.prose .compat thead th{background:var(--bg-soft);font-size:12.5px}