/*
Theme Name: HNQA
Theme URI: https://hoangngocquanganh.com/
Author: Hoàng Ngọc Quang Anh
Description: Theme công nghệ hiện đại, nhẹ, dễ đọc, chuẩn SEO cho blog thủ thuật Windows, phần mềm và đồ họa.
Version: 2.0.0
Requires at least: 6.5
Requires PHP: 8.1
Text Domain: hnqa
*/

:root{
  --brand:#1559d6; --brand-d:#0f45a8; --brand-l:#eaf1ff;
  --teal:#0ea5a0; --teal-l:#e3f7f5;
  --navy:#0a1630; --navy-2:#11264f;
  --ink:#0f172a; --text:#273244; --muted:#617089; --line:#e2e8f1; --bg:#f4f7fc; --white:#fff;
  --r:16px; --r-sm:10px; --wrap:1200px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 4px 14px rgba(15,23,42,.05);
  --shadow-h:0 2px 6px rgba(15,23,42,.06),0 16px 34px rgba(21,89,214,.13);
  --font:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img,svg,video,iframe{max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .15s}
a:hover{color:var(--brand-d)}
:focus-visible{outline:3px solid #8db4ff;outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{color:var(--ink);line-height:1.28;margin:0 0 .5em;font-weight:700;letter-spacing:-.015em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px;color:#fff}
.ico{width:1em;height:1em;flex-shrink:0;vertical-align:-.125em}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--line)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--brand),var(--teal))}
.header-inner{display:flex;align-items:center;gap:20px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);flex-shrink:0}
.brand:hover{color:var(--ink)}
.brand-mark{width:42px;height:42px;display:block;flex-shrink:0;filter:drop-shadow(0 4px 10px rgba(29,78,216,.28))}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:800;font-size:17px;letter-spacing:-.015em}
.brand-name b{font-weight:800;background:linear-gradient(90deg,var(--brand),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-tag{font-size:12px;color:var(--muted);font-weight:500}
.site-nav{display:flex;align-items:center;margin-left:auto}
.menu{list-style:none;margin:0;padding:0;display:flex;gap:2px}
.menu li{position:relative}
.menu a{white-space:nowrap;display:flex;align-items:center;gap:4px;padding:9px 13px;border-radius:10px;color:var(--ink);font-weight:600;font-size:15px}
.menu a:hover,.menu .current-menu-item>a,.menu .current-menu-ancestor>a{background:var(--brand-l);color:var(--brand)}
.menu>.menu-item-has-children>a::after{content:"";width:6px;height:6px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translate(-2px,-1px);opacity:.55;margin-left:4px}
.menu .sub-menu{list-style:none;margin:0;padding:8px;position:absolute;top:calc(100% + 6px);left:0;min-width:230px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 40px rgba(15,23,42,.14);opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}
.menu .sub-menu::before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
.menu li:hover>.sub-menu,.menu li:focus-within>.sub-menu{opacity:1;visibility:visible;transform:none}
.menu .sub-menu a{font-weight:500;font-size:14.5px;padding:9px 12px}
.sub-toggle{display:none}
.header-actions{display:flex;align-items:center;gap:6px}
.icon-btn{display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);cursor:pointer;font-size:19px;transition:.15s}
.icon-btn:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle{display:none;position:relative}
.nav-toggle .bars,.nav-toggle .bars::before,.nav-toggle .bars::after{position:absolute;left:12px;width:18px;height:2px;background:currentColor;border-radius:2px;content:"";transition:.2s}
.nav-toggle .bars{top:20px}
.nav-toggle .bars::before{left:0;top:-6px}
.nav-toggle .bars::after{left:0;top:6px}
.nav-toggle[aria-expanded="true"] .bars{background:transparent}
.nav-toggle[aria-expanded="true"] .bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{top:0;transform:rotate(-45deg)}
.search-panel{border-top:1px solid var(--line);background:#fff;padding:16px 0}
.search-panel[hidden]{display:none}
.search-panel .search-form{max-width:none}
.progress{position:absolute;left:0;bottom:-1px;height:3px;width:0;background:linear-gradient(90deg,var(--brand),var(--teal));transition:width .1s linear}

/* ---------- Thành phần chung ---------- */
.site-main{min-height:60vh}
.crumbs{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:14px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.5}
.section{margin:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-title{font-size:24px;margin:0;display:flex;align-items:center;gap:10px}
.section-title::before{content:"";width:10px;height:10px;border-radius:3px;background:linear-gradient(135deg,var(--brand),var(--teal));transform:rotate(45deg);flex-shrink:0}
.section-sub{margin:4px 0 0;color:var(--muted);font-size:15px}
.more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;white-space:nowrap;padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink)}
.more:hover{border-color:var(--brand);color:var(--brand)}
.empty{color:var(--muted);padding:40px 0;text-align:center}
.badge{display:inline-block;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-l);padding:4px 10px;border-radius:999px;line-height:1.3}
a.badge:hover{background:var(--brand);color:#fff}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:14px;font-weight:500}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip small{color:var(--muted);font-size:12px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;font-weight:600;padding:12px 22px;border-radius:12px;border:0;cursor:pointer;font:inherit;font-weight:600}
.btn:hover{background:var(--brand-d);color:#fff}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:var(--teal-l);color:var(--navy)}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;font-size:13px;color:var(--muted)}
.meta span,.meta time{display:inline-flex;align-items:center;gap:5px}
.search-form{display:flex;align-items:center;gap:8px;max-width:600px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px 6px 6px 16px;box-shadow:var(--shadow)}
.search-form:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(21,89,214,.14)}
.search-form .ico{color:var(--muted);font-size:20px}
.search-form input{flex:1;min-width:0;height:42px;border:0;padding:0 4px;font:inherit;font-size:15.5px;color:var(--ink);background:transparent;outline:0}
.search-form button{height:42px;padding:0 20px;border:0;border-radius:10px;background:var(--brand);color:#fff;font:inherit;font-weight:600;cursor:pointer}
.search-form button:hover{background:var(--brand-d)}

/* ---------- Thẻ bài ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{position:relative;display:flex;flex-direction:column;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);border-color:#cfdcf5}
.card-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg);border-bottom:1px solid var(--line)}
.card-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.card:hover .card-thumb img{transform:scale(1.04)}
.thumb-ph{display:grid;place-items:center;height:100%;color:#fff;font-size:44px;background:linear-gradient(135deg,var(--brand),var(--teal))}
.card-body{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:16px 18px 18px;flex:1}
.card-title{font-size:17px;line-height:1.42;margin:0;font-weight:700;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-title a{color:var(--ink)}
.card-title a::after{content:"";position:absolute;inset:0;z-index:1}
.card .badge{position:relative;z-index:2}
.card-title a:hover,.card:hover .card-title a{color:var(--brand)}
.card-excerpt{margin:0;color:var(--muted);font-size:14.5px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .meta{margin-top:auto;padding-top:4px}

/* Thẻ lớn (bài nổi bật) */
.card-big .card-thumb{aspect-ratio:16/8.4}
.card-big .card-body{padding:22px 24px 24px;gap:10px}
.card-big .card-title{font-size:25px;line-height:1.32;-webkit-line-clamp:3}
.card-big .card-excerpt{font-size:15.5px;-webkit-line-clamp:3}

/* Thẻ ngang (danh sách) */
.card-row{flex-direction:row;align-items:stretch}
.card-row .card-thumb{width:38%;max-width:180px;flex-shrink:0;aspect-ratio:auto;border-bottom:0;border-right:1px solid var(--line)}
.card-row .card-body{padding:12px 14px;gap:6px}
.card-row .card-title{font-size:15px;-webkit-line-clamp:3}
.card-row .thumb-ph{font-size:28px}

/* ---------- Trang chủ ---------- */
.hero{position:relative;overflow:hidden;color:#cdd8ee;background:radial-gradient(900px 420px at 85% -10%,rgba(14,165,160,.35),transparent 60%),radial-gradient(700px 400px at 0% 110%,rgba(21,89,214,.45),transparent 60%),linear-gradient(160deg,var(--navy),var(--navy-2));padding:64px 0 120px}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:22px 22px;mask-image:linear-gradient(180deg,#000,transparent 85%);-webkit-mask-image:linear-gradient(180deg,#000,transparent 85%)}
.hero .wrap{position:relative}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;margin:0 0 18px;font-size:13px;font-weight:600;color:#bfe9e6;background:rgba(14,165,160,.14);border:1px solid rgba(14,165,160,.35);padding:6px 12px;border-radius:999px}
.hero-kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:#2ee6c9;box-shadow:0 0 0 4px rgba(46,230,201,.2)}
.hero-title{font-size:46px;line-height:1.15;max-width:820px;margin:0 0 16px;color:#fff;font-weight:800;letter-spacing:-.025em}
.hero-title em{font-style:normal;background:linear-gradient(90deg,#6ea8ff,#2ee6c9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;margin:0 0 28px;max-width:640px;color:#b7c4dc}
.hero .search-form{max-width:640px;border-color:transparent;box-shadow:0 10px 40px rgba(0,0,0,.25)}
.hero-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:18px;font-size:14px}
.hero-tags span{color:#8fa0bf}
.hero-tags a{color:#dbe6fb;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12)}
.hero-tags a:hover{background:rgba(255,255,255,.16);color:#fff}

.topics{position:relative;margin-top:-72px;z-index:2}
.topic-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.topic{display:flex;flex-direction:column;gap:12px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);color:var(--ink);transition:.2s}
.topic:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);border-color:#cfdcf5;color:var(--ink)}
.topic-ico{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;font-size:22px;color:var(--brand);background:var(--brand-l)}
.topic:nth-child(3n+2) .topic-ico{color:var(--teal);background:var(--teal-l)}
.topic:nth-child(3n) .topic-ico{color:#7c3aed;background:#f1ebff}
.topic-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.topic-name{font-weight:700;font-size:15px;line-height:1.3}
.topic-count{font-size:13px;color:var(--muted)}

.feature{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:start}
.feature-list{display:flex;flex-direction:column;gap:14px}
.feature-list .card-row .card-thumb{max-width:150px}

.cat-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-col{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.cat-col-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.cat-col-head .topic-ico{width:38px;height:38px;font-size:19px;border-radius:10px}
.cat-col-head h3{font-size:18px;margin:0}
.cat-col-head h3 a{color:var(--ink)}
.cat-col-head h3 a:hover{color:var(--brand)}
.cat-col-lead{display:block;border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:var(--bg);margin-bottom:12px;border:1px solid var(--line)}
.cat-col-lead img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.cat-col-lead:hover img{transform:scale(1.04)}
.cat-col-list{list-style:none;margin:0 0 14px;padding:0;counter-reset:n}
.cat-col-list li{counter-increment:n;display:flex;gap:12px;padding:10px 0;border-top:1px dashed var(--line);font-size:15px;line-height:1.45;font-weight:600}
.cat-col-list li:first-child{border-top:0;padding-top:0}
.cat-col-list li::before{content:counter(n,decimal-leading-zero);font-size:13px;font-weight:700;color:#a8b5cc;padding-top:2px}
.cat-col-list a{color:var(--ink)}
.cat-col-list a:hover{color:var(--brand)}
.cat-col .more{margin-top:auto;align-self:flex-start}

.cta{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:center;padding:28px 32px;border-radius:20px;color:#cdd8ee;background:radial-gradient(500px 220px at 100% 0,rgba(46,230,201,.28),transparent 60%),linear-gradient(135deg,var(--navy),#163a7a)}
.cta-ico{display:grid;place-items:center;width:60px;height:60px;border-radius:16px;font-size:30px;color:#2ee6c9;background:rgba(46,230,201,.12);border:1px solid rgba(46,230,201,.3)}
.cta h2{color:#fff;font-size:22px;margin:0 0 4px}
.cta p{margin:0;color:#b7c4dc}

/* ---------- Đầu trang danh sách / bài viết ---------- */
.page-hero{background:linear-gradient(180deg,#fff,var(--bg));border-bottom:1px solid var(--line);padding:30px 0 34px}
.page-hero h1{font-size:36px;margin:0 0 8px;font-weight:800}
.page-desc{color:var(--muted);max-width:760px;font-size:16px}
.page-desc p{margin:0}
.page-count{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:14px;color:var(--muted);font-weight:500}
.page-hero .chips{margin-top:18px}
.page-hero .search-form{margin-top:18px}
.list-wrap{padding-top:36px}

/* ---------- Bài viết ---------- */
.post-hero{background:#fff;border-bottom:1px solid var(--line);padding:30px 0 30px}
.post-hero-inner{max-width:860px}
.post-hero .badge{margin-bottom:12px}
.post-title{font-size:38px;line-height:1.22;margin:0 0 18px;font-weight:800}
.post-byline{display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.post-byline .avatar{border-radius:50%;border:2px solid var(--brand-l)}
.byline-text{display:flex;flex-direction:column;line-height:1.4}
.author{font-weight:700;color:var(--ink);font-size:14.5px}
.updated{display:inline-flex;align-items:center;gap:5px}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start;padding-top:32px}
.post{min-width:0}
.post-body{background:#fff;border:1px solid var(--line);border-radius:20px;padding:36px 44px;box-shadow:var(--shadow)}
.post-cover{margin:-8px 0 30px}
.post-cover img{width:100%;border-radius:14px;display:block;border:1px solid var(--line)}

.entry{font-size:17.5px;line-height:1.8;color:var(--text);overflow-wrap:break-word}
/* Bài cũ có chèn sẵn font Verdana / cỡ chữ: ép về kiểu chữ chung cho dễ đọc */
.entry [style*="font-family"]{font-family:inherit!important}
.entry [style*="font-size"]{font-size:inherit!important}
.entry [style*="line-height"]{line-height:inherit!important}
.entry>*:first-child{margin-top:0}
.entry p,.entry ul,.entry ol,.entry blockquote,.entry figure,.entry table,.entry pre{margin:0 0 1.2em}
.entry h2{font-size:26px;margin:1.9em 0 .7em;padding-bottom:10px;border-bottom:2px solid var(--line);position:relative}
.entry h2::after{content:"";position:absolute;left:0;bottom:-2px;width:64px;height:2px;background:linear-gradient(90deg,var(--brand),var(--teal))}
.entry h3{font-size:21px;margin:1.6em 0 .55em}
.entry h4{font-size:18px;margin:1.4em 0 .5em}
.entry a{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;text-decoration-color:rgba(21,89,214,.4)}
.entry a:hover{text-decoration-color:currentColor}
.entry img{border-radius:12px;height:auto;border:1px solid var(--line)}
.entry figure,.entry .wp-caption{max-width:100%!important}
.entry figcaption,.entry .wp-caption-text{font-size:14px;color:var(--muted);text-align:center;margin-top:8px}
.entry ul,.entry ol{padding-left:1.4em}
.entry li{margin:.35em 0}
.entry li::marker{color:var(--brand);font-weight:700}
.entry strong,.entry b{color:var(--ink)}
.entry blockquote{border:1px solid #cfe0ff;border-left:4px solid var(--brand);background:var(--brand-l);margin-left:0;margin-right:0;padding:16px 20px;border-radius:0 12px 12px 0}
.entry blockquote p:last-child{margin-bottom:0}
.entry code,.entry kbd{font-family:Consolas,'Cascadia Mono',monospace;font-size:.86em;background:#f1f4fa;border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:#b4235a}
.entry kbd{color:var(--ink);border-bottom-width:2px}
.entry pre{background:var(--navy);color:#e2e8f0;border-radius:12px;padding:18px 20px;overflow:auto;font-size:14px;line-height:1.65}
.entry pre code{background:none;border:0;padding:0;color:inherit}
.entry table{border-collapse:collapse;width:100%;display:block;overflow-x:auto;font-size:15px;border-radius:12px}
.entry th,.entry td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.entry th{background:var(--bg);color:var(--ink)}
.entry iframe{border-radius:12px}
.entry hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}

.toc{border:1px solid var(--line);background:linear-gradient(180deg,#f7faff,#fff);border-radius:14px;padding:16px 20px;margin:0 0 1.6em;font-size:15px;line-height:1.5}
.toc summary{font-weight:700;color:var(--ink);cursor:pointer;display:flex;align-items:center;gap:8px;list-style:none}
.toc summary::-webkit-details-marker{display:none}
.toc summary::before{content:"☰";display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--brand-l);color:var(--brand);font-size:14px}
.toc summary::after{content:"";margin-left:auto;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:.2s}
.toc[open] summary::after{transform:rotate(-135deg)}
.toc-count{font-size:12.5px;font-weight:600;color:var(--muted);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:2px 9px}
.toc ol{margin:12px 0 0;padding-left:1.4em}
.toc li{margin:.4em 0}
.toc li::marker{color:var(--brand);font-weight:700}
.toc .toc-h3{margin-left:1.1em;list-style:circle}
.toc a{text-decoration:none;color:var(--text)}
.toc a:hover{color:var(--brand)}

.post-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
.post-tags{display:flex;flex-wrap:wrap;gap:8px}
.share{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);font-weight:600}
.share a,.share button{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;font-size:17px}
.share a:hover,.share button:hover{border-color:var(--brand);color:var(--brand)}
.share .copied{border-color:var(--teal);color:var(--teal)}

.author-box{display:flex;gap:16px;align-items:center;margin-top:24px;padding:20px;border-radius:14px;background:var(--bg);border:1px solid var(--line)}
.author-box .avatar{border-radius:50%;flex-shrink:0}
.author-box p{margin:2px 0 0;font-size:14.5px;color:var(--muted)}
.author-box strong{color:var(--ink)}

.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}
.post-nav a{display:block;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--ink);font-weight:600;font-size:15px;line-height:1.45;box-shadow:var(--shadow)}
.post-nav a:hover{border-color:var(--brand);color:var(--brand)}
.post-nav span{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:4px;text-transform:uppercase;letter-spacing:.04em}
.post-nav .next{text-align:right;grid-column:2}
.related{margin:36px 0}
.related .section-head{margin-bottom:18px}
.related .card-title{font-size:15.5px}
.comments-wrap{margin:32px 0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px 32px}

/* ---------- Cột bên ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px;align-self:stretch}
.side-toc{position:sticky;top:90px}
.widget{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.widget-title{font-size:16px;margin:0 0 14px;display:flex;align-items:center;gap:8px}
.widget-title::before{content:"";width:4px;height:16px;border-radius:4px;background:linear-gradient(var(--brand),var(--teal))}
.widget .search-form{padding:4px 4px 4px 12px;box-shadow:none}
.widget .search-form input,.widget .search-form button{height:36px;font-size:14px}
.widget .search-form button{padding:0 14px}
.mini-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.mini-list a{display:flex;gap:12px;align-items:flex-start;color:var(--ink);font-size:14px;font-weight:600;line-height:1.42}
.mini-list a:hover{color:var(--brand)}
.mini-thumb{width:72px;height:54px;object-fit:cover;border-radius:8px;flex-shrink:0;border:1px solid var(--line)}
.side-toc ol{list-style:none;margin:0;padding:0;font-size:14px;max-height:52vh;overflow:auto}
.side-toc li{border-left:2px solid var(--line)}
.side-toc li.toc-h3 a{padding-left:24px;font-size:13.5px}
.side-toc a{display:block;padding:6px 12px;color:var(--text);line-height:1.4}
.side-toc a:hover{color:var(--brand)}
.side-toc li.on{border-left-color:var(--brand)}
.side-toc li.on>a{color:var(--brand);font-weight:600}

/* ---------- Quảng cáo ---------- */
.ad{margin:30px 0;text-align:center;min-height:100px}
.ad-label{display:block;font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.ad-side{margin:0}

/* ---------- 404 ---------- */
.notfound{text-align:center;padding:56px 0 20px;max-width:640px;margin:0 auto}
.nf-code{font-size:110px;font-weight:800;line-height:1;margin:0 0 6px;letter-spacing:-.04em;background:linear-gradient(90deg,var(--brand),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound h1{font-size:30px}
.notfound p{color:var(--muted)}
.notfound .search-form{margin:24px auto}

/* ---------- Phân trang ---------- */
.pagination{margin:44px 0 10px}
.nav-links{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.page-numbers{display:inline-grid;place-items:center;min-width:44px;height:44px;padding:0 14px;background:#fff;border:1px solid var(--line);border-radius:12px;color:var(--ink);font-weight:600}
.page-numbers.current{background:var(--brand);border-color:var(--brand);color:#fff}
a.page-numbers:hover{border-color:var(--brand);color:var(--brand)}
.page-numbers.dots{background:none;border:0}
.load-more-wrap{display:flex;justify-content:center;margin:36px 0 0}
.load-more{min-width:220px;justify-content:center}
.load-more.is-loading{opacity:.7;pointer-events:none}
.js-more .pagination{display:none}

/* ---------- Bình luận (mặc định WP) ---------- */
.comment-list{list-style:none;padding:0}
.comment-list .comment{border-top:1px solid var(--line);padding:16px 0}
.comment-form input[type=text],.comment-form input[type=email],.comment-form input[type=url],.comment-form textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:inherit}
.comment-form .submit{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:11px 22px;font:inherit;font-weight:600;cursor:pointer}

/* ---------- Chân trang ---------- */
.site-footer{content-visibility:auto;contain-intrinsic-size:auto 420px;margin-top:72px;background:var(--navy);color:#a9b6cc;font-size:15px;position:relative}
.site-footer::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--brand),var(--teal))}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-top:48px;padding-bottom:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:18px;margin:0 0 12px}
.footer-mark{width:40px;height:40px;flex-shrink:0}
.footer-desc{margin:0;max-width:380px;line-height:1.65}
.footer-title{font-weight:700;color:#fff;margin:0 0 14px;font-size:15px}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer-links a{color:#a9b6cc}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:18px;padding-bottom:22px;font-size:13px;color:#7d8ba3;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.to-top{position:fixed;right:20px;bottom:20px;z-index:40;width:46px;height:46px;border-radius:14px;border:0;background:var(--brand);color:#fff;font-size:20px;cursor:pointer;display:grid;place-items:center;box-shadow:0 10px 24px rgba(21,89,214,.35);opacity:0;visibility:hidden;transform:translateY(10px);transition:.2s}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--brand-d)}

/* ---------- Màn hình vừa ---------- */
@media (max-width:1180px){
  .topic-grid{grid-template-columns:repeat(4,1fr)}
  .layout{grid-template-columns:minmax(0,1fr) 290px;gap:24px}
  .post-body{padding:30px 32px}
}
@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .side-toc{display:none}
  .grid,.grid-4{grid-template-columns:repeat(2,1fr)}
  .feature{grid-template-columns:1fr}
  .cat-cols{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-title{font-size:40px}
}

/* ---------- Menu thu gọn ---------- */
@media (max-width:1180px){
  .nav-toggle{display:grid}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(15,23,42,.1);padding:10px 20px 18px;max-height:calc(100vh - 70px);overflow:auto}
  .site-nav.is-open{display:block}
  .header-actions{margin-left:auto}
  .menu{flex-direction:column}
  .menu li{display:flex;flex-wrap:wrap;align-items:center;border-bottom:1px solid var(--line)}
  .menu li:last-child{border-bottom:0}
  .menu li>a{flex:1;padding:13px 6px;font-size:16px;border-radius:8px}
  .menu>.menu-item-has-children>a::after{display:none}
  .menu .sub-menu{position:static;display:none;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;border-radius:10px;min-width:0;width:100%;margin:0 0 10px;padding:4px;background:var(--bg)}
  .menu .sub-menu li{border-bottom:0}
  .menu li.sub-open>.sub-menu{display:block}
  .sub-toggle{display:block;width:44px;height:44px;border:0;background:transparent;cursor:pointer;position:relative}
  .sub-toggle::after{content:"";position:absolute;left:17px;top:15px;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:.2s}
  .sub-open>.sub-toggle::after{transform:rotate(-135deg);top:19px}
}

/* ---------- Điện thoại ---------- */
@media (max-width:640px){
  .wrap{padding:0 16px}
  .header-inner{min-height:60px;gap:10px}
  .brand-mark{width:36px;height:36px}
  .brand-tag{display:none}
  .brand-name{font-size:15px}
  .icon-btn{width:40px;height:40px}
  .hero{padding:40px 0 96px}
  .hero-title{font-size:30px}
  .hero-sub{font-size:16px;margin-bottom:22px}
  .hero-tags{display:none}
  .search-form{padding-left:12px}
  .search-form button{padding:0 14px}
  .topics{margin-top:-62px}
  .topic-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .topic:nth-child(n+9){display:none}
  .topic{flex-direction:row;align-items:center;padding:12px;gap:10px}
  .topic-ico{width:38px;height:38px;font-size:19px}
  .topic-name{font-size:14px}
  .topic-count{font-size:12px}
  .section{margin:40px 0}
  .section-title{font-size:21px}
  .grid,.grid-2,.grid-4,.cat-cols{grid-template-columns:1fr;gap:18px}
  .card-big .card-title{font-size:21px}
  .card-big .card-body{padding:18px}
  .card-row .card-thumb{width:120px}
  .cta{grid-template-columns:1fr;text-align:left;padding:24px}
  .page-hero{padding:22px 0 24px}
  .page-hero h1{font-size:27px}
  .post-hero{padding:22px 0}
  .post-title{font-size:27px}
  .layout{padding-top:16px}
  .post-body{padding:20px 18px;border-radius:16px}
  .post-cover{margin:0 0 22px}
  .entry{font-size:17px;line-height:1.75}
  .entry h2{font-size:22px}
  .entry h3{font-size:19px}
  .post-nav{grid-template-columns:1fr}
  .post-nav .next{grid-column:auto;text-align:left}
  .comments-wrap{padding:20px 18px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .nf-code{font-size:84px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.toc li a,.side-toc a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Nút "Test Laptop" nổi bật trên menu ---------- */
.menu>.menu-cta{margin-left:6px}
.menu>.menu-cta>a{color:#fff;background:linear-gradient(135deg,var(--brand),var(--teal));box-shadow:0 6px 16px rgba(21,89,214,.28);padding:9px 16px 9px 14px}
.menu>.menu-cta>a::before{content:"";width:18px;height:18px;margin-right:2px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4.5' y='5' width='15' height='10.5' rx='1.5'/%3E%3Cpath d='M2.5 19h19M9 10l2 2 4-4'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4.5' y='5' width='15' height='10.5' rx='1.5'/%3E%3Cpath d='M2.5 19h19M9 10l2 2 4-4'/%3E%3C/svg%3E") center/contain no-repeat}
.menu>.menu-cta>a:hover{color:#fff;background:linear-gradient(135deg,var(--brand-d),#0b8c88);box-shadow:0 8px 22px rgba(21,89,214,.38)}
@media (max-width:1180px){
  .menu>.menu-cta{margin:10px 0 0;border-bottom:0}
  .menu>.menu-cta>a{justify-content:center;padding:13px 16px;border-radius:12px}
}