/* ===== KyTuDacBiet — UI v2 (28/10/2026) =====
   Lớp đè lên style.css: bảng màu xanh theo mockup, hero 2 cột, thẻ bo tròn,
   footer 1 hàng, thanh đáy mobile .kd-dock, bảng/box mobile sát mép. */
:root{
  --pink:#1a6dff; --pink-deep:#0b55d6; --tint-p:#eaf2ff; --tint-c:#f3f7ff;
  --line-p:#cfe0ff; --line-c:#dbe6f7; --tile-bd:#e1e8f4;
  --card-sh:0 6px 22px rgba(20,60,140,.08);
}
body{background:linear-gradient(180deg,#f4f8ff 0,#fbfcff 480px,#fff 100%) fixed;font-size:17px;line-height:1.6;overflow-wrap:break-word}
p,li{font-size:17px}

/* ---- header ---- */
.header{background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid #e3ecfb;box-shadow:0 2px 14px rgba(20,60,140,.06)}
.logo-mark{animation:none;border-radius:12px;background:#fff}
.brand-name{font-size:21px;font-weight:800;letter-spacing:0}
.brand-sub{font-size:13.5px;color:var(--muted)}
.nav .nav-list a{font-size:16px;font-weight:600;padding:9px 14px;border-radius:10px;position:relative}
.nav .nav-list a:hover{background:var(--tint-p);color:var(--pink-deep)}
.nav .nav-list .current-menu-item>a,.nav .nav-list .current_page_item>a{background:transparent;color:var(--pink-deep)}
.nav .nav-list .current-menu-item>a::after,.nav .nav-list .current_page_item>a::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2.5px;border-radius:2px;background:var(--pink)}
.hdr-cta{flex:none;display:inline-flex;align-items:center;gap:7px;padding:10px 18px;border-radius:11px;background:var(--pink);color:#fff!important;font-size:15.5px;font-weight:700;box-shadow:0 6px 16px rgba(26,109,255,.28)}
.hdr-cta:hover{background:var(--pink-deep)}
.hdr-cta svg{width:16px;height:16px}

/* ---- hero ---- */
.hero{background:linear-gradient(135deg,#eef4ff 0,#f7faff 55%,#fff 100%);border-bottom:1px solid #e3ecfb;overflow:hidden}
.hero-ov{display:none}
.hero-in{padding:44px 22px 40px}
.hero.is-home .hero-in{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:34px;align-items:center}
.hero h1{font-size:40px;line-height:1.16;font-weight:900;letter-spacing:-.4px;margin:0 0 14px}
.hero.is-home h1 em{font-style:normal;color:var(--pink)}
.eyebrow{display:inline-block;margin-bottom:14px;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line-p);color:var(--pink-deep);font-size:13px;font-weight:800;letter-spacing:.8px;text-transform:uppercase}
.hero .hero-def{margin:0 0 14px!important;max-width:none!important;font-size:17px;line-height:1.7;color:#33405c}
.hero-list{max-width:none;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0 0 18px}
.hero-list li{display:block;position:relative;padding-left:42px!important;background:#fff;border:1px solid var(--tile-bd);border-radius:12px;padding:10px 12px;font-size:15.5px;line-height:1.45;box-shadow:0 2px 8px rgba(20,60,140,.04)}
.hero-list li::before{position:absolute;left:12px;top:11px;content:"✓";color:#fff;background:var(--pink);width:20px;height:20px;border-radius:50%;flex:none;font-size:12px;display:grid;place-items:center}
.hero .hero-hint{margin:14px 0 0!important;max-width:none!important;font-size:15px!important;color:var(--muted)}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.hero-cta .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:12px;font-size:17px;box-shadow:0 8px 20px rgba(26,109,255,.3)}
.hero-cta .btn-primary svg{width:18px;height:18px}
.hero-cta .btn-ghost{display:inline-flex;align-items:center;padding:13px 20px;border-radius:12px;background:#fff;border:1.5px solid var(--line-p);color:var(--pink-deep);font-size:16px;font-weight:700}
.hero-art{position:relative;min-height:290px}
.hero-art .hc{position:absolute;left:0;right:0;margin:auto;width:min(100%,360px);background:#fff;border-radius:16px;padding:18px 22px;box-shadow:0 14px 34px rgba(20,60,140,.16);font-size:30px;line-height:1.2;color:var(--ink);text-align:center;white-space:nowrap;overflow:hidden}
.hero-art .hc small{display:block;font-size:12px;letter-spacing:.8px;text-transform:uppercase;color:var(--muted2);font-weight:700;margin-bottom:4px}
.hero-art .c1{top:0;transform:rotate(-4deg) translateX(-14px)}
.hero-art .c2{top:92px;transform:rotate(3deg) translateX(18px)}
.hero-art .c3{top:184px;transform:rotate(-2deg) translateX(-6px)}
.hero-art .badge{position:absolute;right:6px;bottom:-4px;width:74px;height:74px;border-radius:50%;background:var(--pink);color:#fff;display:grid;place-items:center;font-size:34px;box-shadow:0 10px 24px rgba(26,109,255,.4);transform:rotate(8deg)}
.crumb{font-size:14.5px}

/* ---- thẻ / hộp ---- */
main{padding-top:26px;padding-bottom:30px}
.search{border:1.5px solid var(--line-p);border-radius:14px;box-shadow:var(--card-sh);padding:0 16px}
.search .ic{display:grid;place-items:center;color:var(--pink)}
.search .ic svg,.box-head .t svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.search input{font-size:17px}
.counter{background:#fff;font-size:14.5px;box-shadow:0 2px 8px rgba(20,60,140,.06)}
.counter b{font-size:16px}
.box{background:#fff;border:1px solid var(--line-c);border-radius:18px;box-shadow:var(--card-sh);padding:18px 20px;scroll-margin-top:90px}
.box-head .t{font-size:18px;font-weight:800;color:var(--ink);display:inline-flex;align-items:center;gap:8px}
.box-head .h{font-size:14.5px;color:var(--muted)}
.box textarea{background:#f8fbff;border-color:var(--line-p);font-size:24px}
.btn{font-size:15.5px;border-radius:11px;border-color:var(--line-p);color:var(--pink-deep)}
.btn:hover{border-color:var(--pink);background:var(--tint-p)}
.btn-primary{background:var(--pink);color:#fff;box-shadow:0 6px 16px rgba(26,109,255,.25)}
.btn-primary:hover{background:var(--pink-deep);color:#fff}
.tabs{border-bottom:0;padding-bottom:6px;gap:8px}
.tab{font-size:15px;font-weight:600;padding:8px 16px;border-radius:999px;border-color:var(--line-c);color:#33405c}
.tab.active{background:var(--pink);border-color:var(--pink);color:#fff;box-shadow:0 4px 12px rgba(26,109,255,.28)}
.tab.fancy.active{background:var(--ink);border-color:var(--ink)}
.g-head .h2{font-size:24px}
.tile{border-radius:14px;border-color:var(--tile-bd);box-shadow:0 1px 3px rgba(20,60,140,.05)}
.fancy-wrap{background:#fff;border-color:var(--line-c);border-radius:16px;box-shadow:var(--card-sh)}
.name-card{border-radius:14px;border-color:var(--tile-bd);box-shadow:0 1px 3px rgba(20,60,140,.05)}
.name-card .lbl{color:var(--pink-deep)}
.sample{border-radius:12px}
.seo{padding-top:8px}
.seo section.card{background:#fff;border:1px solid var(--line-c);box-shadow:var(--card-sh);border-radius:18px}
.seo section{border-left-color:var(--pink)}
.seo h2{font-size:26px}
.seo p,.post-body p{font-size:17px;line-height:1.75}
.post-body{font-size:17px}
.post-body table{border-radius:10px}
.post-body td,.post-body th{font-size:16px}
.art-head{border-radius:20px;margin-top:6px;background:linear-gradient(135deg,#eef4ff,#fff)}
.art-head .ov{display:none}
.art-head h1{font-size:34px}
.art{background:#fff;border:1px solid var(--line-c);border-radius:16px;box-shadow:var(--card-sh);padding:18px;margin-bottom:14px}
.art-excerpt,.intro,.tip{font-size:17px}
.side-card{border-radius:16px;box-shadow:var(--card-sh)}
.side-card.p{background:var(--tint-p);border-color:var(--line-p)}
.mod{background:var(--tint-p)}

/* ---- footer (khớp mockup) ---- */
.footer{background:#fff;border-top:1px solid #e3ecfb;margin-top:34px}
.ft{max-width:var(--wrap);margin:0 auto;padding:30px 22px 16px}
.ft-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:24px}
.ft-brand{display:flex;align-items:center;gap:10px;min-width:0;color:var(--ink)}
.ft-brand:hover{color:var(--ink)}
.ft-crown{flex:none;width:38px;height:38px;color:var(--pink)}
.ft-brand b{display:block;font-size:20px;font-weight:800;line-height:1.15;letter-spacing:-.2px}
.ft-brand small{display:block;white-space:nowrap;font-size:13px;color:var(--muted);line-height:1.3;margin-top:2px}
.ft-links{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:0;list-style:none;margin:0;padding:0}
.ft-links li{display:flex;align-items:center;white-space:nowrap}
.ft-links li+li::before{content:"";width:1px;height:14px;background:#cdd7e8;margin:0 12px}
.ft-links a{font-size:14.5px;font-weight:600;color:#33405c}
.ft-links a:hover{color:var(--pink)}
.ft-soc{display:flex;gap:10px;flex:none}
.ft-soc a{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--tint-p);color:var(--pink-deep);transition:transform .15s,background .15s,color .15s}
.ft-soc a:hover{transform:translateY(-2px);background:var(--pink);color:#fff}
.ft-soc svg{width:19px;height:19px;fill:currentColor}
.ft-info{margin:22px 0 0;padding:14px 16px;border-radius:14px;background:#f6f9ff;border:1px solid #e3ecfb;display:flex;flex-wrap:wrap;gap:6px 22px;font-size:14.5px;line-height:1.6;color:var(--muted)}
.ft-info b{color:var(--ink);font-weight:700}
.ft-copy{text-align:center;margin-top:20px;font-size:14px;color:#6a7589}

/* ---- thanh đáy mobile ---- */
.kd-dock,.kd-sheet{display:none}

@media(max-width:1020px){
  .hero.is-home .hero-in{grid-template-columns:minmax(0,1fr)}
  .hero-art{display:none}
  .ft-row{grid-template-columns:minmax(0,1fr);justify-items:center;text-align:center;gap:16px}
  .ft-links{flex-wrap:wrap}
  .ft-brand{justify-content:center}
}
@media(max-width:820px){
  .hdr-cta{display:none}
  .nav-toggle{border-color:var(--line-p)}
}

@media(max-width:640px){
  :root{--gut:8px}
  body{padding-bottom:calc(92px + env(safe-area-inset-bottom))}
  .wrap{padding-left:var(--gut);padding-right:var(--gut)}
  .hero-in,.ft{padding-left:var(--gut);padding-right:var(--gut)}
  .hero-in{padding-top:22px;padding-bottom:22px}
  .hero h1{font-size:28px}
  .hero-list{grid-template-columns:minmax(0,1fr)}
  .hero-cta .btn-primary{width:100%;justify-content:center}
  .hero-cta .btn-ghost{display:none}
  .header-in{padding-left:var(--gut);padding-right:var(--gut)}
  .brand-sub{display:none}
  main{padding-top:12px;padding-bottom:12px}
  /* box sát mép: bỏ lề/đệm ngang để item rộng tối đa */
  .search{padding:0 10px;border-radius:12px}
  .box,.fancy-wrap,.ngen.box{padding:10px 6px;border-radius:12px}
  .box textarea{padding:10px 8px}
  .names{padding-top:10px}
  .names-grid{gap:6px}
  .name-card{padding:9px 8px}
  .grid{gap:6px}
  .row,.tabs,.g-head{margin-left:0;margin-right:0}
  .art{padding:12px 8px;border-radius:12px;gap:10px}
  .art-head{border-radius:14px}
  .art-head .in{padding:18px 10px 18px}
  .art-head h1{font-size:26px}
  .side-card{padding:12px 8px}
  .name-row{padding:11px 8px;gap:10px}
  .rel-card{padding:11px 8px}
  .kwbox,.mod{padding:12px 8px}
  .seo{padding:6px var(--gut) 14px}
  .seo section,.seo section.alt{margin:16px 0;padding-left:8px}
  .seo section.card{padding:12px 6px;border-radius:12px}
  .seo section.plain{padding-left:0}
  .seo h2{font-size:23px}
  .post-body h2{font-size:23px}
  /* khối do bài viết dựng: bỏ viền/đệm chồng nhau */
  .post-body :is(div,section)[class*="card"],.post-body :is(div,section)[class*="box"],.seo :is(div,section)[class*="box"]{margin-left:0;margin-right:0}
  /* bảng cuộn ngang trong chính nó */
  .post-body table,.seo table,main table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .post-body pre,.seo pre{max-width:100%;overflow-x:auto}
  .post-body img,.seo img{max-width:100%;height:auto}
  .toast{bottom:104px;max-width:calc(100vw - 24px);font-size:15px}
  /* footer mobile gọn: thanh đáy đã có menu */
  .ft-links{gap:8px 20px}
  .ft-links li+li::before{display:none}
  .ft-brand small{white-space:normal}
  .ft-links a{font-size:14.5px}
  .ft-info{padding:12px 10px}

  /* ===== kd-dock: viên thuốc nổi, mục đang chọn nở nhãn ===== */
  .kd-dock{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:2147482000;padding:0 8px calc(10px + env(safe-area-inset-bottom));pointer-events:none;direction:ltr}
  .kd-dock *{box-sizing:border-box}
  .kd-pill{pointer-events:auto;position:relative;display:flex;align-items:center;justify-content:space-between;width:100%;max-width:460px;margin:0 auto;padding:6px;border-radius:26px;background:linear-gradient(135deg,#0a2a63,#001d49);box-shadow:0 12px 30px rgba(0,29,73,.42),inset 0 1px 0 rgba(255,255,255,.12)}
  .kd-i{position:relative;flex:0 0 auto;display:flex;align-items:center;justify-content:center;gap:8px;height:48px;min-width:48px;padding:0 12px;border:0;border-radius:20px;background:transparent;color:#a9bde0;font:700 14px/1 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;text-decoration:none;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:background .25s,color .25s,padding .25s}
  .kd-i svg{width:23px;height:23px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  .kd-i span{display:none;white-space:nowrap}
  .kd-i.on{background:#fff;color:var(--pink-deep);padding:0 16px}
  .kd-i.on span{display:inline}
  .kd-i:active{transform:scale(.94)}
  .kd-sheet{position:fixed;inset:0;z-index:2147482100;background:rgba(0,20,60,.55);align-items:flex-end}
  .kd-sheet.open{display:flex}
  .kd-sp{position:relative;width:100%;max-height:84vh;overflow-y:auto;background:#fff;border-radius:24px 24px 0 0;padding:20px 12px calc(24px + env(safe-area-inset-bottom));animation:kd-up .22s ease-out}
  .kd-sp h3{margin:0 44px 12px 4px;font-size:18px;color:var(--ink)}
  .kd-x{position:absolute;right:8px;top:10px;width:44px;height:44px;border:0;border-radius:50%;background:var(--tint-p);color:var(--ink);font-size:22px;cursor:pointer}
  .kd-g{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:14px}
  .kd-g a{display:block;padding:13px 12px;border-radius:12px;background:var(--tint-c);border:1px solid var(--line-c);color:var(--ink);font-size:15.5px;font-weight:600;overflow-wrap:anywhere}
  .kd-g a:active{background:var(--tint-p)}
  .kd-s{display:flex;gap:10px;justify-content:center}
  .kd-s a{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--tint-p);color:var(--pink-deep)}
  .kd-s svg{width:20px;height:20px;fill:currentColor}
}
@keyframes kd-up{from{transform:translateY(40px);opacity:.6}to{transform:none;opacity:1}}
@media(min-width:641px){.kd-dock,.kd-sheet{display:none!important}}

/* p trong bài: inline style nhỏ (ghi chú, gợi ý) cũng không dưới 17px */
:is(.post-body,.seo) p[style*="font-size"],:is(.post-body,.seo) .kt-sub{font-size:17px!important}

/* quảng cáo tự chèn không được đẩy trang tràn ngang */
ins.adsbygoogle,ins.adsbygoogle iframe,[id^="aswift_"]{max-width:100%!important}
body>ins,.kd-ad{overflow:hidden}