/* =========================================================
   VHV – Theme 2 "trung tâm luyện thi"
   Nền trắng sạch, chữ không chân đậm (Commissioner), nút bo tròn vàng,
   dải xám nhạt phân đoạn, chân trang tối. Nạp SAU style.css để đè.
   ========================================================= */
:root {
  --ink: #222222;
  --navy: #222222;
  --navy-2: #3a3f4b;
  --muted: #5f6672;
  --line: #e6e6e6;
  --bg: #ffffff;
  --soft: #f4f4f4;
  --band: #f7f7f5;
  --yellow: #fecd0d;
  --yellow-2: #f5bf00;
  --yellow-soft: #fff6d6;
  --red: #c02b0a;
  --dark: #252937;
  --accent: var(--yellow);
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
  --serif: "Commissioner", "Be Vietnam Pro", system-ui, sans-serif;
  --sans: "Roboto", "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  --head: "Commissioner", "Be Vietnam Pro", system-ui, sans-serif;

  /* mọi chuyên mục dùng chung một màu nhấn – bỏ kiểu mỗi mục một màu */
  --c-home: var(--yellow); --c-intro: var(--yellow); --c-music: var(--yellow); --c-research: var(--yellow);
  --c-ielts: var(--yellow); --c-toeic: var(--yellow); --c-cefr: var(--yellow); --c-docs: var(--yellow); --c-contact: var(--yellow);
}
body { background: #fff; color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.65; }
h1, h2, h3, h4 { font-family: var(--head); color: var(--ink); font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.2; }
h2 { font-size: clamp(1.5rem, 2.4vw, 1.9rem); }
a { color: var(--red); }
.container { width: min(1200px, 100% - 32px); }
.eyebrow { color: var(--red); letter-spacing: .08em; }
.serif { font-family: var(--head); }

/* ---------------- Header ---------------- */
.topbar, .site-nav { display: none !important; }
.hdr { position: sticky; top: 0; z-index: 60; background: #fff; border-bottom: 1px solid var(--line); }
.hdr-in { display: flex; align-items: center; gap: 20px; min-height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none !important; color: var(--ink); flex-shrink: 0; }
.logo-mark { width: 42px; height: 42px; border-radius: 10px; background: var(--yellow); display: grid; place-items: center; font: 800 1.2rem var(--head); color: var(--ink); }
.logo-txt { display: flex; flex-direction: column; line-height: 1.1; }
.logo-txt b { font: 700 1.05rem var(--head); }
.logo-txt small { font-size: .72rem; color: var(--muted); letter-spacing: .02em; }
.menu { display: flex; align-items: center; gap: 0; flex: 1; min-width: 0; }
.menu > a, .dd > a { display: block; padding: 26px 8px; font: 700 .78rem var(--head); text-transform: uppercase; letter-spacing: .02em; color: var(--ink); text-decoration: none; white-space: nowrap; }
.menu > a:hover, .dd:hover > a, .menu a.on { color: var(--red); text-decoration: none; }
.dd { position: relative; }
.dd > a::after { content: ""; display: inline-block; margin-left: 5px; border: 4px solid transparent; border-top-color: currentColor; transform: translateY(2px); }
.dd-menu { position: absolute; left: 0; top: 100%; min-width: 250px; background: #fff; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 16px 40px rgba(0,0,0,.1); padding: 8px; display: none; }
.dd:hover .dd-menu, .dd:focus-within .dd-menu { display: block; }
.dd-menu a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--ink); font-size: .92rem; text-decoration: none; }
.dd-menu a:hover { background: var(--yellow-soft); }
.hdr-cta { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.hdr-cta .lnk { font: 600 .88rem var(--head); color: var(--ink); text-decoration: none; white-space: nowrap; }
.hdr-cta .lnk:hover { color: var(--red); }
.burger { display: none; width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--soft); cursor: pointer; }
.burger span, .burger span::before, .burger span::after { display: block; width: 18px; height: 2px; background: var(--ink); margin: auto; position: relative; content: ""; }
.burger span::before { position: absolute; top: -6px; } .burger span::after { position: absolute; top: 6px; }
@media (max-width: 1180px) {
  .menu { display: none; position: absolute; left: 0; right: 0; top: 76px; background: #fff; flex-direction: column; align-items: stretch; padding: 8px 16px 20px; border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px rgba(0,0,0,.08); max-height: calc(100vh - 76px); overflow: auto; }
  .menu.open { display: flex; }
  .menu > a, .dd > a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .dd-menu { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 6px 12px; }
  .burger { display: block; }
  .hdr-cta .lnk.hide-m { display: none; }
}

/* ---------------- Buttons ---------------- */
.btn { --b: var(--yellow); background: var(--b); border: 1.5px solid var(--b); color: var(--ink); border-radius: 999px; padding: 12px 26px; font: 600 .95rem var(--head); }
.btn:hover { filter: none; background: var(--yellow-2); border-color: var(--yellow-2); }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--yellow); }
.btn.ghost:hover { background: var(--yellow-soft); }
.btn.sm { padding: 7px 16px; font-size: .85rem; }
.btn.lg { padding: 16px 34px; font-size: 1.02rem; }
.btn.dark { --b: var(--ink); color: #fff; }
.btn.dark:hover { background: #000; border-color: #000; }
.pill-cta { background: var(--yellow); color: var(--ink) !important; border-radius: 999px; padding: 9px 20px; font: 600 .9rem var(--head); text-decoration: none !important; white-space: nowrap; }
.pill-cta:hover { background: var(--yellow-2); }

/* ---------------- Page banner (trang con) ---------------- */
.page-banner { background: var(--band) !important; border-bottom: 1px solid var(--line); }
.page-banner::before { display: none; }
.page-banner .container { padding: 40px 0 34px; }
.page-banner .nav-ic { display: none; }
.page-banner h1 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.crumbs, .crumbs a { color: var(--muted); }

/* ---------------- Cards & components (làm phẳng, bớt màu) ---------------- */
.card { border-radius: var(--radius); box-shadow: none; border: 1px solid var(--line); }
.feature { border-top: 1px solid var(--line) !important; }
a.feature:hover { box-shadow: 0 12px 30px rgba(0,0,0,.08); border-color: #d6d6d6; }
.feature .nav-ic, .course .cover, .doc .cover { filter: none; }
.feature .nav-ic { background: var(--yellow-soft) !important; color: var(--ink); box-shadow: none; }
.feature .more { color: var(--red); }
.badge { background: var(--soft); color: var(--ink); border-radius: 6px; }
.badge.red, .badge.orange, .badge.gold, .badge.purple, .badge.green { background: var(--yellow-soft); color: #7a5a00; }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--yellow); }
.pill.active, .pill:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.side a.active { background: var(--yellow); color: var(--ink); }
.catalog li.active { background: var(--yellow-soft); border-color: #f1dc8a; }
.catalog li.active .num { background: var(--ink); color: #fff; }
.course .cover { background: var(--dark) !important; border-radius: 10px; }
.course .cover b { font-family: var(--head); }
.doc .cover { background: var(--dark) !important; }
.type .n, .type .thumb { background: var(--yellow-soft); color: var(--ink); }
.type:hover { border-color: var(--yellow); }
.media-slot { background: #2a2d36; }
.quote-band { background: var(--dark); }
.score .ring { background: conic-gradient(var(--ink) calc(var(--p) * 1%), #e3e3e3 0); }
.q label.opt input { accent-color: var(--ink); }
.timeline > div::before { background: var(--yellow); }

/* ---------------- Trang chủ ---------------- */
.h-hero { padding: 64px 0 56px; }
.h-hero .container { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.h-hero h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); margin-bottom: 14px; text-wrap: balance; }
.h-hero .sub { font: 600 1.3rem var(--head); margin: 0 0 18px; }
.h-hero p.lead { color: #3d424d; font-size: 1.05rem; max-width: 560px; }
.h-hero .ctas { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 28px 0 30px; max-width: 560px; }
.h-hero .ctas .btn { width: 100%; padding: 15px 18px; }
.proof { display: flex; align-items: center; gap: 16px; }
.proof .num { font: 700 1.6rem var(--head); color: var(--red); line-height: 1; }
.proof .sep { width: 1px; height: 34px; background: var(--line); }
.proof small { color: var(--muted); display: block; font-size: .82rem; }
.h-portrait { position: relative; justify-self: center; width: min(460px, 100%); aspect-ratio: 1; }
.h-portrait .ring { position: absolute; inset: 0; border-radius: 50%; background: var(--yellow-soft); }
.h-portrait .ring::after { content: ""; position: absolute; inset: 7%; border-radius: 50%; border: 2px dashed #f2d56b; }
.h-portrait img { position: absolute; inset: 9%; width: 82%; height: 82%; object-fit: cover; object-position: 35% 18%; border-radius: 50%; }
.h-portrait .tag { position: absolute; left: -6%; bottom: 10%; background: #fff; border-radius: 14px; padding: 10px 16px; box-shadow: 0 12px 30px rgba(0,0,0,.12); }
.h-portrait .tag b { display: block; font: 700 1.05rem var(--head); }
.h-portrait .tag span { color: var(--red); font: 700 .9rem var(--head); }
.h-portrait .tag2 { position: absolute; right: -2%; top: 12%; background: var(--ink); color: #fff; border-radius: 14px; padding: 10px 16px; font: 600 .85rem var(--head); box-shadow: 0 12px 30px rgba(0,0,0,.18); }
.h-portrait .tag2 b { display: block; color: var(--yellow); font-size: 1.1rem; }

.h-band { background: var(--band); padding: 56px 0; }
.h-courses { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.h-courses a { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 70px; padding: 12px 18px; background: #fff; border: 1px solid #6c757d; border-radius: 999px; color: var(--ink); font: 700 .92rem var(--head); text-transform: uppercase; text-align: center; text-decoration: none; transition: background .15s, border-color .15s; }
.h-courses a:hover { background: var(--yellow); border-color: var(--yellow); }
.h-courses a i { width: 26px; height: 26px; border-radius: 50%; background: var(--yellow-soft); display: grid; place-items: center; font-style: normal; flex-shrink: 0; }
.h-courses a:hover i { background: #fff; }
.h-courses a i svg { width: 15px; height: 15px; }
.h-more { text-align: center; margin-top: 22px; }
.h-more a { color: var(--ink); font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }

.h-sec { padding: 72px 0; }
.h-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.h-head h2 { margin: 0; }
.h-head p { margin: 6px 0 0; color: var(--muted); max-width: 640px; }

.router { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.router-form { display: grid; gap: 16px; }
.router-form label { font: 600 .9rem var(--head); display: block; margin-bottom: 6px; }
.router-form select { width: 100%; padding: 13px 16px; border-radius: 10px; border: 1px solid #cfcfcf; font: inherit; background: #fff; }
.route { display: flex; gap: 0; counter-reset: st; overflow-x: auto; padding-bottom: 4px; }
.route .st { flex: 1; min-width: 140px; position: relative; padding: 0 10px 0 0; }
.route .st::before { counter-increment: st; content: counter(st); width: 34px; height: 34px; border-radius: 50%; background: var(--yellow); display: grid; place-items: center; font: 700 .9rem var(--head); position: relative; z-index: 1; }
.route .st::after { content: ""; position: absolute; left: 34px; right: 0; top: 16px; height: 2px; background: #e8d48a; }
.route .st:last-child::after { display: none; }
.route .st b { display: block; margin-top: 10px; font: 700 .95rem var(--head); }
.route .st small { color: var(--muted); }
.route-sum { margin-top: 18px; padding: 16px 18px; border-radius: 12px; background: var(--yellow-soft); font-size: .95rem; }

.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
.about-img { border-radius: 18px; overflow: hidden; aspect-ratio: 4/5; background: var(--soft); }
.about-img img { width: 100%; height: 100%; object-fit: cover; object-position: 30% 15%; }
.facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 22px 0; }
.facts div { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.facts b { display: block; font: 700 1.5rem var(--head); }
.facts span { color: var(--muted); font-size: .88rem; }
.checks-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks-list li { padding-left: 28px; position: relative; }
.checks-list li::before { content: ""; position: absolute; left: 0; top: 5px; width: 18px; height: 18px; border-radius: 50%; background: var(--yellow) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23222' stroke-width='3'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center/11px no-repeat; }

.papers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.paper { border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; display: flex; flex-direction: column; gap: 10px; background: #fff; text-decoration: none !important; color: var(--ink); transition: border-color .15s, transform .15s; }
.paper:hover { border-color: var(--yellow); transform: translateY(-2px); }
.paper .j { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.paper b { font: 600 1.02rem/1.4 var(--head); }
.paper .meta { margin-top: auto; display: flex; justify-content: space-between; font-size: .85rem; color: var(--muted); }
.paper .meta em { font-style: normal; color: var(--red); font-weight: 700; }

.songs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.song { border-radius: 14px; overflow: hidden; background: #fff; border: 1px solid var(--line); }
.song .media-slot { border-radius: 0; }
.song div.cap2 { padding: 14px 16px; }
.song div.cap2 b { font: 600 1rem var(--head); display: block; }
.song div.cap2 span { color: var(--muted); font-size: .86rem; }

.h-form { background: var(--band); padding: 64px 0; }
.h-form .box { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; background: #fff; border-radius: 20px; padding: 40px; border: 1px solid var(--line); }
.h-form .box h2 { margin-bottom: 8px; }

/* ---------------- Footer ---------------- */
.site-footer { background: var(--dark); color: #c9ccd4; margin-top: 0; padding: 56px 0 22px; }
.site-footer h4 { font-family: var(--head); font-size: 1.05rem; color: #fff; }
.site-footer a { color: #e4e6ec; }
.site-footer a:hover { color: var(--yellow); }

/* nút liên hệ nổi bên phải */
.float-ct { position: fixed; right: 14px; bottom: 90px; z-index: 70; display: flex; flex-direction: column; gap: 8px; }
.float-ct a { width: 46px; height: 46px; border-radius: 50%; background: var(--yellow); display: grid; place-items: center; box-shadow: 0 6px 16px rgba(0,0,0,.18); color: var(--ink); }
.float-ct a svg { width: 20px; height: 20px; }

@media (max-width: 960px) {
  .h-hero .container, .router, .about-grid, .h-form .box { grid-template-columns: 1fr; }
  .h-portrait { width: min(360px, 90%); }
  .h-courses { grid-template-columns: repeat(2, 1fr); }
  .papers, .songs { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .h-hero { padding: 36px 0; }
  .h-hero .ctas { grid-template-columns: 1fr; }
  .h-courses { grid-template-columns: 1fr; }
  .h-courses a { min-height: 56px; }
  .papers, .songs { grid-template-columns: 1fr; }
  .h-form .box { padding: 24px; }
  .h-portrait .tag { left: 0; }
}

/* chống tràn ngang trên màn hình nhỏ */
.h-hero .container > *, .router > *, .about-grid > *, .h-form .box > *, .split > * { min-width: 0; }
@media (max-width: 600px) {
  .hdr-in { gap: 10px; }
  .logo-mark { width: 36px; height: 36px; }
  .logo-txt b { font-size: .92rem; }
  .logo-txt small { display: none; }
  .pill-cta { padding: 8px 12px; font-size: .78rem; }
  .route .st { min-width: 120px; }
}
@media (max-width: 380px) { .pill-cta { display: none; } }
@media (max-width: 900px) {
  .split[style] { grid-template-columns: 1fr !important; }
  aside.stack[style] { position: static !important; }
}

/* =========================================================
   Thang chữ (02/11/2026) – khớp onthiielts.com.vn/khoa-hoc:
   Roboto 400 16px/1.5 cho nội dung; Commissioner cho tiêu đề, menu, nút.
   Tiêu đề co giãn theo thang chuẩn Bootstrap (RFS).
   ========================================================= */
body { font-family: "Roboto", sans-serif; font-size: 16px; font-weight: 400; line-height: 1.5; color: #222; }
p { line-height: 1.5; }
h1, h2, h3, h4, h5, h6, .h1, .h2, .h3 { font-family: "Commissioner", Arial, sans-serif; font-weight: 600; line-height: 1.2; letter-spacing: normal; color: #222; }
h1, .h1 { font-size: calc(1.375rem + 1.5vw); }
h2, .h2 { font-size: calc(1.325rem + .9vw); }
h3, .h3 { font-size: 1.2rem; line-height: 1.5; }
h4 { font-size: 1.15rem; line-height: 1.5; }
@media (min-width: 1200px) { h1, .h1 { font-size: 2.5rem; } h2, .h2 { font-size: 2rem; } }
@media (min-width: 1400px) { h1, .h1 { font-size: 48px; } h2, .h2 { font-size: 32px; } }
/* tiêu đề trong banner trang con, hero, các khối dùng chung thang h1/h2 ở trên */
.page-banner h1, .h-hero h1 { font-size: calc(1.375rem + 1.5vw); line-height: 1.2; }
@media (min-width: 1200px) { .page-banner h1, .h-hero h1 { font-size: 2.5rem; } }
@media (min-width: 1400px) { .page-banner h1, .h-hero h1 { font-size: 48px; } }
.section-title h2, .h-head h2, .h-form .box h2, .card h2 { font-size: calc(1.325rem + .9vw); }
@media (min-width: 1200px) { .section-title h2, .h-head h2, .h-form .box h2, .card h2 { font-size: 2rem; } }
.h-hero .sub { font: 600 1.5rem/1.2 "Commissioner", sans-serif; }
.h-hero p.lead { font-size: 16px; line-height: 1.5; }
/* menu */
.menu > a, .dd > a { font: 700 13px/24px "Commissioner", sans-serif; text-transform: uppercase; letter-spacing: normal; }
.dd-menu a { font: 300 14px/1.5 "Commissioner", sans-serif; color: #222; }
.hdr-cta .lnk { font: 700 13px/24px "Commissioner", sans-serif; text-transform: uppercase; }
/* nút */
.btn, .pill-cta, .h-courses a, .vl-submit { font-family: "Commissioner", sans-serif; font-weight: 700; font-size: 16px; line-height: 24px; }
.btn.sm { font-size: 14px; line-height: 20px; }
.pill-cta { padding: 6px 20px; border-radius: 20px; }
/* chân trang */
.site-footer h4 { font: 600 18.4px/1.5 "Commissioner", sans-serif; }
.site-footer { font-size: 16px; line-height: 1.5; }
.btn.lg { font-size: 16px; }

/* =========================================================
   Trang Kiến thức (kien-thuc.html, bai-viet.html) – bố cục theo
   onthiielts.com.vn/kien-thuc/ielts-reading (đo 02/11/2026)
   ========================================================= */
body.kt-page { background: #f8f9fa; }
.kt-container { width: min(1320px, 100%); margin: 0 auto; padding: 0 8px; }
.kt-banner .kt-container { position: relative; }
.kt-crumbs { position: absolute; left: 8px; top: 32px; font: 400 16px/24px "Roboto", sans-serif; color: #000; display: flex; flex-wrap: wrap; gap: 0 8px; }
.kt-crumbs a { color: #000; text-decoration: none; }
.kt-crumbs a:hover { color: #fca110; }
.kt-crumbs span[aria-hidden] { color: #6c757d; }
.kt-intro { max-width: 685px; margin: 0 auto; padding: 80px 0; display: flex; flex-direction: column; gap: 16px; text-align: center; justify-content: center; }
.kt-intro h1 { margin: 0; }
.kt-intro p { margin: 0; font: 400 16px/25.6px "Roboto", sans-serif; color: #222; }
.kt-main { padding: 40px 0; }
.kt-grid { display: grid; grid-template-columns: 323px minmax(0, 1fr); gap: 0; align-items: start; }
.kt-side { padding: 0 29px 0 16px; position: sticky; top: 96px; }
.kt-cats { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.kt-cats a { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 100px; border: 1px solid transparent; font: 500 16px/24px "Roboto", sans-serif; color: #333; text-decoration: none; transition: border-color .15s, background .15s, color .15s; }
.kt-cats a svg { width: 24px; height: 24px; flex-shrink: 0; }
.kt-cats a:hover { color: #fca110; }
.kt-cats a.on { border-color: #fecd0d; background: #fff9f1; color: #fca110; }

.kt-post { display: grid; grid-template-columns: 329px minmax(0, 1fr); gap: 20px; margin: 0 0 32px; }
.kt-thumb { display: block; border-radius: 10px; overflow: hidden; aspect-ratio: 300 / 169; text-decoration: none; }
.kt-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.kt-cover { width: 100%; height: 100%; background: #252937; color: #fff; padding: 18px 20px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.kt-cover::after { content: ""; position: absolute; right: -40px; bottom: -40px; width: 140px; height: 140px; border-radius: 50%; border: 18px solid #fecd0d; opacity: .9; }
.kt-cover small { font: 700 12px/1 "Commissioner", sans-serif; text-transform: uppercase; letter-spacing: .06em; color: #fecd0d; }
.kt-cover b { font: 600 17px/1.35 "Commissioner", sans-serif; max-width: 82%; position: relative; z-index: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.kt-body { padding-top: 4px; }
.kt-body time { display: block; font: 400 14px/21px "Roboto", sans-serif; color: #222; }
.kt-body h2 { margin: 11px 0 0; font: 600 20px/30px "Commissioner", Arial, sans-serif; color: #212529; }
.kt-body h2 a { color: inherit; text-decoration: none; }
.kt-body h2 a:hover { color: #fca110; }
.kt-body p { margin: 16px 0 0; font: 400 16px/24px "Roboto", sans-serif; color: #222; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kt-empty { padding: 40px; text-align: center; color: #5f6672; background: #fff; border-radius: 10px; }

.kt-paging { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; padding: 20px 0; }
.kt-paging a, .kt-paging span { display: inline-block; padding: 8px 15px; border: 1px solid #e9e9ec; font: 400 13.6px/20.4px "Roboto", sans-serif; color: #fca110; text-decoration: none; background: transparent; }
.kt-paging a:hover { background: #fff9f1; }
.kt-paging .cur { background: #fecd0d; border-color: #fecd0d; color: #fff; font-weight: 700; }
.kt-paging .dots { border: 0; padding: 0 5px; color: #222; }

/* bài chi tiết */
.kt-article { background: #fff; border-radius: 10px; padding: 40px 48px; }
.kt-article .meta { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; font: 400 14px/21px "Roboto", sans-serif; color: #5f6672; margin-bottom: 20px; }
.kt-article .chip { display: inline-block; padding: 4px 14px; border-radius: 100px; background: #fff9f1; border: 1px solid #fecd0d; color: #fca110; font-weight: 500; text-decoration: none; }
.kt-content { font: 400 16px/1.6 "Roboto", sans-serif; color: #222; }
.kt-content h2 { font: 600 24px/1.3 "Commissioner", sans-serif; margin: 32px 0 12px; }
.kt-content h3 { font: 600 20px/1.4 "Commissioner", sans-serif; margin: 24px 0 10px; }
.kt-content p { margin: 0 0 16px; }
.kt-content ul, .kt-content ol { margin: 0 0 16px; padding-left: 24px; }
.kt-content li { margin-bottom: 6px; }
.kt-content blockquote { margin: 20px 0; padding: 14px 20px; border-left: 4px solid #fecd0d; background: #fff9f1; border-radius: 0 10px 10px 0; }
.kt-content a { color: #c02b0a; }
.kt-related { margin-top: 40px; }
.kt-related h2 { font: 600 24px/1.3 "Commissioner", sans-serif; margin: 0 0 20px; }

@media (max-width: 991px) {
  .kt-grid { grid-template-columns: minmax(0, 1fr); }
  .kt-side { position: static; padding: 0 0 24px; }
  .kt-cats { flex-direction: row; overflow-x: auto; gap: 8px; padding-bottom: 6px; scrollbar-width: thin; }
  .kt-cats a { white-space: nowrap; background: #fff; }
  .kt-crumbs { position: static; padding-top: 20px; }
  .kt-intro { padding: 32px 0 40px; }
  .kt-article { padding: 28px 22px; }
}
@media (max-width: 575px) {
  .kt-post { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .kt-body p { display: none; }
}
@media (max-width: 600px) {
  .pill-cta { font-size: 13px; line-height: 20px; padding: 6px 12px; }
  .logo-txt b { font-size: .9rem; }
  .hdr-in { gap: 8px; }
}

/* Khối mở đầu: nguyên ảnh lớn làm nền (02/11/2026) */
.h-banner { position: relative; background: #e9eee4; overflow: hidden; }
.h-banner picture, .h-banner img { display: block; width: 100%; height: auto; }
.h-banner-cta { position: absolute; left: 12.8%; top: 59%; display: flex; gap: 14px; }
.h-banner-cta .btn { box-shadow: 0 8px 22px rgba(0,0,0,.12); }
.h-banner-cta .btn.ghost { background: rgba(255,255,255,.92); }
.h-intro { padding: 48px 0; border-bottom: 1px solid var(--line); }
.h-intro .container { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.h-intro h1 { margin: 0 0 12px; }
.h-intro .sub { font: 600 1.5rem/1.2 "Commissioner", sans-serif; margin: 0 0 14px; }
.h-intro .lead { margin: 0; color: #3d424d; }
.h-intro .proof { justify-content: flex-end; }
.h-intro-cta { display: none !important; }
@media (max-width: 1100px) { .h-banner-cta { top: 57%; } .h-banner-cta .btn.lg { padding: 12px 22px; font-size: 15px; } }
@media (max-width: 900px) {
  .h-banner-cta { display: none; }
  .h-intro .container { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .h-intro .proof { justify-content: flex-start; flex-wrap: wrap; }
  .h-intro-cta { display: grid !important; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 22px; }
}
@media (max-width: 600px) { .h-intro-cta { grid-template-columns: 1fr; } .h-intro { padding: 28px 0; } }
/* nút trên ảnh: nằm giữa câu trích dẫn (kết thúc ~53.6%) và chồng sách (bắt đầu ~65.5%) */
.h-banner-cta { top: 55.8%; }
.h-banner-cta .btn.lg { padding: 11px 26px; }
@media (max-width: 1100px) { .h-banner-cta { top: 55.6%; gap: 10px; } .h-banner-cta .btn.lg { padding: 8px 18px; font-size: 14px; line-height: 20px; } }

/* Khung PDF xám nhẹ – trang Nghiên cứu (02/11/2026, thay nền xám đậm #525659/#323639) */
.pdf-bar { background: #f1f3f5; color: #222; border-bottom: 1px solid #e3e6ea; }
.pdf-bar button { border-color: #ced4da; color: #222; background: #fff; }
.pdf-bar button:hover { background: #e9ecef; }
.pdf { background: #f8f9fa; }
.pdf-page { box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 6px 18px rgba(0,0,0,.06); border: 1px solid #e6e6e6; }
.pdf-page .abs { background: #f8f9fa; border-left-color: #fecd0d; }

/* =========================================================
   Trang Giới thiệu – khối hồ sơ cân đối (02/11/2026, .gt-*)
   ========================================================= */
.gt-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 32px; align-items: start; }
.gt-aside { display: flex; flex-direction: column; gap: 20px; }
.gt-profile { background: #fff; border: 1px solid #e6e6e6; border-radius: 16px; overflow: hidden; }
.gt-photo { aspect-ratio: 4 / 5; overflow: hidden; background: #eef1ea; }
.gt-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 52% 18%; display: block; }
.gt-info { padding: 22px 24px 24px; text-align: center; }
.gt-info h3 { font: 600 22px/1.3 "Commissioner", sans-serif; margin: 0 0 8px; }
.gt-role { margin: 0 0 4px; font: 400 15px/1.5 "Roboto", sans-serif; color: #5f6672; }
.gt-tags { list-style: none; padding: 0; margin: 16px 0 20px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.gt-tags li { padding: 4px 14px; border-radius: 100px; border: 1px solid #f1dc8a; background: #fff9f1; font: 500 13px/20px "Roboto", sans-serif; color: #222; }
.gt-box { background: #fff; border: 1px solid #e6e6e6; border-radius: 16px; padding: 22px 24px; }
.gt-box h3 { font: 600 19.2px/1.4 "Commissioner", sans-serif; margin: 0 0 14px; }
.gt-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.gt-list li { position: relative; padding-left: 18px; font: 400 15px/1.5 "Roboto", sans-serif; color: #3d424d; }
.gt-list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: #fecd0d; }
.gt-stats { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid #e6e6e6; border-radius: 12px; overflow: hidden; margin-bottom: 16px; }
.gt-stats div { padding: 12px 8px; text-align: center; }
.gt-stats div:nth-child(odd) { border-right: 1px solid #e6e6e6; }
.gt-stats div:nth-child(-n+2) { border-bottom: 1px solid #e6e6e6; }
.gt-stats b { display: block; font: 600 22px/1.2 "Commissioner", sans-serif; color: #222; }
.gt-stats span { font: 400 13px/1.4 "Roboto", sans-serif; color: #5f6672; }
.gt-links { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.gt-links a { display: inline-block; padding: 5px 12px; border-radius: 100px; border: 1px solid #e6e6e6; font: 500 13px/20px "Roboto", sans-serif; color: #222; text-decoration: none; }
.gt-links a:hover { border-color: #fecd0d; background: #fff9f1; }
.gt-note { margin: 14px 0 0; font: 400 12.5px/1.5 "Roboto", sans-serif; color: #8a909a; }
/* màn hình vừa: hồ sơ lên đầu, nằm ngang (ảnh trái, thông tin phải); 2 hộp còn lại chia đôi */
@media (max-width: 1100px) {
  .gt-layout { grid-template-columns: minmax(0, 1fr); }
  .gt-aside { order: -1; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .gt-profile { grid-column: 1 / -1; display: grid; grid-template-columns: 240px minmax(0, 1fr); }
  .gt-photo { aspect-ratio: auto; height: 100%; min-height: 280px; }
  .gt-info { text-align: left; display: flex; flex-direction: column; justify-content: center; padding: 28px 32px; }
  .gt-tags { justify-content: flex-start; }
  .gt-info .btn.block { width: auto; align-self: flex-start; }
}
@media (max-width: 640px) {
  .gt-aside { grid-template-columns: minmax(0, 1fr); }
  .gt-profile { grid-template-columns: minmax(0, 1fr); }
  .gt-photo { aspect-ratio: 4 / 4; min-height: 0; }
  .gt-info { text-align: center; padding: 22px 20px 24px; }
  .gt-tags { justify-content: center; }
  .gt-info .btn.block { width: 100%; align-self: stretch; }
}
/* .gt – nhãn lĩnh vực: lưới 2×2 đều nhau ở cột hẹp; nằm 1 hàng khi khối hồ sơ nằm ngang */
.gt-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.gt-tags li { text-align: center; }
@media (max-width: 1100px) and (min-width: 641px) { .gt-tags { display: flex; } }

/* Lớp chữ trích dẫn trên ảnh (02/11/2026) – chữ là HTML riêng, ảnh nền hero-clean đã bỏ chữ.
   Cỡ chữ theo bề rộng ảnh: dòng gốc ~44px trên ảnh 2000px ≈ 2.2vw. */
.h-quote { position: absolute; left: 12.8%; top: 17.5%; width: 46%; }
.h-quote blockquote { margin: 0; }
.h-quote p { margin: 0 0 .55em; font: 400 2.2vw/1.6 "Noto Serif", Georgia, serif; color: #1c2b5a; text-shadow: 0 1px 12px rgba(255,255,255,.65); }
.h-quote p.en { font-style: italic; margin-bottom: 0; }
.h-quote .h-banner-cta { position: static; display: flex; gap: 14px; margin-top: 2.2vw; }
.h-caption { position: absolute; right: 1.2%; bottom: 2.4%; margin: 0; font: 500 1.3vw/1.2 "Roboto", sans-serif; color: #1c2b5a; text-shadow: 0 1px 8px rgba(255,255,255,.7); }
@media (min-width: 2000px) { .h-quote p { font-size: 44px; } .h-caption { font-size: 26px; } }
@media (max-width: 1100px) { .h-quote .h-banner-cta { gap: 10px; margin-top: 1.6vw; } }
@media (max-width: 900px) { .h-quote .h-banner-cta { display: none; } }
@media (max-width: 700px) {
  /* điện thoại: chữ đặt thành dải riêng dưới ảnh để đọc được */
  .h-quote { position: static; width: auto; padding: 18px 16px 4px; background: #f6f8f3; }
  .h-quote p { font-size: 17px; text-shadow: none; }
  .h-caption { font-size: 12px; }
}

/* Lưới video YouTube (kênh VƯƠNG GIA CHANNEL) – toeic, cefr, ielts, giới thiệu (02/11/2026) */
.vid-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 12px; }
.vid-card b { display: block; margin-top: 10px; font: 600 16px/1.4 "Commissioner", sans-serif; color: #222; }
.vid-card small { color: #5f6672; }
.vid-card .media-slot, .vid-sec .media-slot { border-radius: 10px; }
.vid-sec h3 { margin: 22px 0 0; }
@media (max-width: 900px) { .vid-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .vid-grid { grid-template-columns: minmax(0, 1fr); } }
/* Khung video chưa có (IELTS) – không hiện nút phát giả */
.media-slot.vid-soon { text-decoration: none; background: #f1f3f5; color: #5f6672; border: 1px dashed #ced4da; }
.media-slot.vid-soon .tag { background: #fecd0d; color: #222; }
.media-slot.vid-soon .cap { color: #5f6672; padding: 0 16px; }
.media-slot.vid-soon .cap b { color: #222; }
.media-slot.vid-soon:hover { border-color: #fecd0d; }

/* =========================================================
   Footer mới (02/11/2026): dải mời đăng ký · 4 cột · thanh bản quyền
   ========================================================= */
.site-footer.ft { background: #1f2330; color: #b9bfcc; padding: 0; margin-top: 0; font: 400 15px/1.6 "Roboto", sans-serif; }
.ft a { color: #d9dde6; text-decoration: none; }
.ft a:hover { color: #fecd0d; }
.ft-cta { display: flex; align-items: center; justify-content: space-between; gap: 24px 40px; flex-wrap: wrap; padding: 44px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.ft-cta h3 { color: #fff; font: 600 26px/1.25 "Commissioner", sans-serif; margin: 0 0 6px; }
.ft-cta p { margin: 0; color: #b9bfcc; }
.ft-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.ft-cta .btn { color: #222; }
.ft-cta .btn:hover { color: #222; }
.ft .btn.ft-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.35); }
.ft .btn.ft-ghost:hover { background: rgba(255,255,255,.08); border-color: #fecd0d; color: #fff; }
.ft-main { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr); gap: 48px; padding: 52px 0 44px; }
.ft-logo { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.ft-logo .logo-mark { width: 44px; height: 44px; border-radius: 10px; background: #fecd0d; color: #222; display: grid; place-items: center; font: 800 1.2rem "Commissioner", sans-serif; }
.ft-logo b { display: block; color: #fff; font: 700 18px/1.2 "Commissioner", sans-serif; }
.ft-logo small { display: block; color: #8d94a5; font-size: 12px; letter-spacing: .02em; }
.ft-brand p { margin: 0 0 20px; max-width: 420px; }
.ft-social { display: flex; gap: 10px; }
.ft-social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); display: grid; place-items: center; color: #d9dde6; transition: background .15s, border-color .15s, color .15s; }
.ft-social a:hover { background: #fecd0d; border-color: #fecd0d; color: #222; }
.ft-social svg { width: 18px; height: 18px; }
.ft-col h4 { color: #fff; font: 700 13px/1.4 "Commissioner", sans-serif; text-transform: uppercase; letter-spacing: .08em; margin: 6px 0 18px; }
.ft-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.ft-col li a, .ft-col li span { display: inline-flex; align-items: center; gap: 10px; color: #c3c8d3; }
.ft-col li a:hover { color: #fecd0d; }
.ft-col li svg { width: 18px; height: 18px; flex-shrink: 0; color: #fecd0d; }
.ft-hotline { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.ft-hotline svg { width: 40px; height: 40px; padding: 10px; border-radius: 50%; background: #fecd0d; color: #222; flex-shrink: 0; }
.ft-hotline span { display: flex; flex-direction: column; color: #fecd0d; font: 700 22px/1.2 "Commissioner", sans-serif; }
.ft-hotline small { color: #8d94a5; font: 400 12px/1.4 "Roboto", sans-serif; text-transform: uppercase; letter-spacing: .06em; }
.ft-bottom { border-top: 1px solid rgba(255,255,255,.08); background: #1a1d28; }
.ft-bottom .container { display: flex; justify-content: space-between; align-items: center; gap: 10px 24px; flex-wrap: wrap; padding: 18px 0; font-size: 13.5px; color: #8d94a5; }
.ft-bottom-links { display: flex; gap: 20px; flex-wrap: wrap; }
.ft-bottom-links a { color: #aeb4c2; }
@media (max-width: 1080px) { .ft-main { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px; } }
@media (max-width: 600px) {
  .ft-main { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 40px 0 32px; }
  .ft-cta { padding: 32px 0; }
  .ft-cta h3 { font-size: 22px; }
  .ft-cta-btns, .ft-cta-btns .btn { width: 100%; }
}
/* Hiệu ứng trượt vào (motion.css, .rv-right) làm khối lệch ngang tạm thời → cắt tràn ngang; clip không phá position: sticky */
html, body { overflow-x: clip; }

/* Dòng thời gian trang Giới thiệu – kiểu trục giữa xen kẽ (02/11/2026, tiền tố .vt-) */
.vt-wrap { container-type: inline-size; }
.vt { list-style: none; margin: 0; padding: 8px 0; position: relative; display: grid; gap: 22px; }
.vt::before { content: ""; position: absolute; top: 0; bottom: 0; left: 21px; width: 2px; border-radius: 2px; background: linear-gradient(#fecd0d, #f1e2a6 40%, #e6e6e6); }
.vt-item { display: grid; grid-template-columns: 44px minmax(0, 1fr); column-gap: 16px; align-items: start; }
.vt-dot { grid-column: 1; grid-row: 1 / span 2; width: 44px; height: 44px; border-radius: 50%; background: #fff; border: 2px solid #fecd0d; display: grid; place-items: center; position: relative; z-index: 1; box-shadow: 0 0 0 5px #fff; color: #222; }
.vt-dot svg { width: 20px; height: 20px; }
.vt-item.is-now .vt-dot { background: #fecd0d; }
.vt-date { grid-column: 2; padding-top: 9px; }
.vt-date span { display: inline-block; font: 700 14px/22px "Commissioner", sans-serif; color: #7a5a00; background: #fff6d6; border-radius: 100px; padding: 2px 12px; }
.vt-item.is-now .vt-date span { background: #222; color: #fecd0d; }
.vt-card { grid-column: 2; margin-top: 10px; background: #fff; border: 1px solid #e6e6e6; border-radius: 12px; padding: 16px 20px; position: relative; transition: box-shadow .2s, border-color .2s; }
.vt-card:hover { border-color: #f2d56b; box-shadow: 0 10px 28px rgba(0,0,0,.07); }
.vt-item.is-now .vt-card { border-color: #fecd0d; box-shadow: 0 8px 24px rgba(254,205,13,.18); }
.vt-card h4 { margin: 0 0 6px; font: 600 17px/1.4 "Commissioner", sans-serif; color: #222; }
.vt-card p { margin: 0; font: 400 15px/1.6 "Roboto", sans-serif; color: #4a505c; }
.vt-tag { display: inline-block; margin-top: 10px; font: 500 12px/18px "Roboto", sans-serif; color: #5f6672; background: #f4f4f4; border-radius: 6px; padding: 2px 8px; }

/* đủ rộng: trục ở giữa, thẻ xen kẽ trái/phải, năm ở phía đối diện */
@container (min-width: 720px) {
  .vt::before { left: 50%; transform: translateX(-1px); }
  .vt-item { grid-template-columns: minmax(0, 1fr) 56px minmax(0, 1fr); column-gap: 18px; align-items: center; }
  .vt-dot { grid-column: 2; grid-row: 1; justify-self: center; }
  .vt-card { grid-row: 1; margin-top: 0; }
  .vt-date { grid-row: 1; padding-top: 0; }
  .vt-item:nth-child(odd) .vt-card { grid-column: 1; }
  .vt-item:nth-child(odd) .vt-date { grid-column: 3; text-align: left; }
  .vt-item:nth-child(even) .vt-card { grid-column: 3; }
  .vt-item:nth-child(even) .vt-date { grid-column: 1; text-align: right; }
  /* mũi nhọn của thẻ chỉ về trục */
  .vt-card::after { content: ""; position: absolute; top: 50%; width: 12px; height: 12px; background: inherit; border: inherit; transform: translateY(-50%) rotate(45deg); }
  .vt-item:nth-child(odd) .vt-card::after { right: -7px; border-left: 0; border-bottom: 0; }
  .vt-item:nth-child(even) .vt-card::after { left: -7px; border-right: 0; border-top: 0; }
  .vt-date span { font-size: 15px; }
}

/* Khối "Video tư liệu" – trang Giới thiệu (02/11/2026): 1 video lớn + danh sách phát */
.gt-vid { margin-top: 40px; padding: 28px; border-radius: 18px; background: linear-gradient(180deg, #fffaf0 0%, #fff 70%); border: 1px solid #f1e6c8; }
.gt-vid-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.gt-vid-eyebrow { display: inline-block; font: 700 12px/1 "Commissioner", sans-serif; letter-spacing: .1em; text-transform: uppercase; color: #c02b0a; margin-bottom: 8px; }
.gt-vid-head h3 { margin: 0; font: 600 26px/1.25 "Commissioner", sans-serif; color: #222; }
.gt-vid-head p { margin: 6px 0 0; color: #5f6672; font-size: 15px; }
.gt-vid-channel { display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px 8px 8px; border-radius: 999px; background: #fff; border: 1px solid #e6e6e6; color: #222 !important; text-decoration: none !important; font: 600 14px/1.2 "Commissioner", sans-serif; box-shadow: 0 2px 8px rgba(0,0,0,.04); transition: border-color .15s, box-shadow .15s; }
.gt-vid-channel:hover { border-color: #ff0033; box-shadow: 0 6px 18px rgba(255,0,51,.12); }
.gt-vid-channel svg { width: 34px; height: 24px; flex-shrink: 0; }
.gt-vid-channel small { display: block; font: 400 12px "Roboto", sans-serif; color: #5f6672; }

.gt-vid-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; }
.gt-vid-main .gt-vid-frame { border-radius: 14px; overflow: hidden; box-shadow: 0 12px 30px rgba(20,28,50,.16); }
.gt-vid-main .media-slot { border-radius: 14px; aspect-ratio: 16 / 9; }
.gt-vid-main .media-slot .tag { left: auto; right: 12px; top: auto; bottom: 12px; background: rgba(0,0,0,.78); font: 600 12px/1 "Roboto", sans-serif; padding: 5px 8px; }
.gt-vid-main .media-slot .play { width: 72px; height: 72px; background: #fecd0d; box-shadow: 0 8px 24px rgba(0,0,0,.3); transition: transform .15s; }
.gt-vid-main .media-slot:hover .play { transform: scale(1.06); }
.gt-vid-main .media-slot .play::after { border-left-color: #222; }
.gt-vid-info { margin-top: 14px; }
.gt-vid-info h4 { margin: 8px 0 4px; font: 600 20px/1.35 "Commissioner", sans-serif; color: #222; }
.gt-vid-meta { font-size: 14px; color: #5f6672; }
.gt-chip { display: inline-block; padding: 3px 10px; border-radius: 999px; font: 600 12px/1.4 "Commissioner", sans-serif; }
.gt-chip.lecture { background: #fff3c4; color: #7a5a00; }
.gt-chip.admission { background: #e7f0ff; color: #1d4ea0; }
.gt-chip.song { background: #fde8e4; color: #a1260b; }

.gt-vid-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 1100px) { .gt-vid-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.gt-vid-item { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px; align-items: start; width: 100%; padding: 8px; border: 1px solid transparent; border-radius: 12px; background: transparent; text-align: left; cursor: pointer; font: inherit; color: inherit; transition: background .15s, border-color .15s; }
.gt-vid-item:hover { background: #fff; border-color: #ececec; }
.gt-vid-item[aria-current="true"] { background: #fff; border-color: #fecd0d; box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.gt-vid-thumb { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 16 / 9; background: #2a2d36; }
.gt-vid-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gt-vid-thumb span { position: absolute; right: 6px; bottom: 6px; background: rgba(0,0,0,.78); color: #fff; font: 600 11px/1 "Roboto", sans-serif; padding: 4px 6px; border-radius: 4px; }
.gt-vid-thumb::after { content: ""; position: absolute; left: 50%; top: 50%; width: 30px; height: 30px; margin: -15px 0 0 -15px; border-radius: 50%; background: rgba(254,205,13,.95) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 7v10l8-5z' fill='%23222'/%3E%3C/svg%3E") center/18px no-repeat; opacity: 0; transition: opacity .15s; }
.gt-vid-item:hover .gt-vid-thumb::after, .gt-vid-item[aria-current="true"] .gt-vid-thumb::after { opacity: 1; }
.gt-vid-item b { display: block; margin: 6px 0 2px; font: 600 15px/1.35 "Commissioner", sans-serif; color: #222; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.gt-vid-item .gt-vid-meta { font-size: 13px; }
.gt-vid-foot { margin: 18px 0 0; font-size: 14px; color: #5f6672; }

@media (max-width: 700px) { .gt-vid { padding: 14px; margin-left: -6px; margin-right: -6px; } .gt-vid-head h3 { font-size: 22px; } .gt-vid-list { grid-template-columns: minmax(0, 1fr); } .gt-vid-item { grid-template-columns: 120px minmax(0, 1fr); gap: 10px; } .gt-vid-info h4 { font-size: 17px; } }

/* =========================================================
   Con trỏ chuột màu thương hiệu (02/11/2026): mũi tên vàng viền đen,
   bàn tay vàng trên nút/liên kết. Chỉ thiết bị có chuột (pointer: fine).
   Không áp cho trang làm bài (lam-bai.html không nạp theme.css) và bài kiểm tra B1 (body.b1).
   ========================================================= */
@media (pointer: fine) {
  body:not(.b1) { cursor: url("data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%2726%27%20height%3D%2726%27%20viewBox%3D%270%200%2026%2026%27%3E%3Cpath%20d%3D%27M4%203v17.5l4.6-4.4%203.2%207%203.3-1.5-3.1-6.8H18z%27%20fill%3D%27%23fecd0d%27%20stroke%3D%27%23222%27%20stroke-width%3D%271.6%27%20stroke-linejoin%3D%27round%27%2F%3E%3C%2Fsvg%3E") 4 3, auto; }
  body:not(.b1) :is(a[href], button:not([disabled]), [role="button"], [role="menuitem"], label, summary, select, .pill, .tab-btn, .catalog li, .media-slot, .burger, input[type="checkbox"], input[type="radio"], input[type="submit"], input[type="button"], .kt-cats a, .ft-social a) { cursor: url("data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%2728%27%20height%3D%2728%27%20viewBox%3D%270%200%2028%2028%27%3E%3Cpath%20d%3D%27M10.5%203.2c1%200%201.8.8%201.8%201.8v6.6h.5V10c0-1%20.8-1.7%201.7-1.7s1.7.7%201.7%201.7v1.6h.5v-.8c0-.9.8-1.7%201.7-1.7s1.7.8%201.7%201.7v1.6h.3c.9%200%201.7.8%201.7%201.7V18c0%203.4-2.7%206.2-6.1%206.2h-1.7c-2%200-3.9-1-5-2.7l-3.4-5.1c-.6-.8-.4-1.9.4-2.4.7-.5%201.6-.4%202.2.2l.2.2V5c0-1%20.8-1.8%201.8-1.8z%27%20fill%3D%27%23fecd0d%27%20stroke%3D%27%23222%27%20stroke-width%3D%271.5%27%20stroke-linejoin%3D%27round%27%2F%3E%3C%2Fsvg%3E") 10 3, pointer !important; }
  body:not(.b1) :is(input:not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]), textarea, [contenteditable="true"]) { cursor: text; }
}

/* Đề thi mẫu trên hệ thống – trang Thi thử (02/11/2026, tiền tố .dm-) */
.dm-sec { background: #f8f9fa; border-bottom: 1px solid var(--line); }
.dm-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; }
.dm-head h2 { margin: 4px 0 6px; }
.dm-filter { display: flex; gap: 8px; flex-wrap: wrap; }
.dm-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.dm-card { background: #fff; border: 1px solid #e6e6e6; border-radius: 14px; padding: 20px 22px; display: flex; flex-direction: column; gap: 8px; transition: border-color .2s, box-shadow .2s, transform .2s; }
.dm-card:hover { border-color: #fecd0d; box-shadow: 0 12px 30px rgba(0,0,0,.07); transform: translateY(-2px); }
.dm-card[hidden] { display: none; }
.dm-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.dm-level { font: 700 13px/20px "Commissioner", sans-serif; background: #222; color: #fecd0d; border-radius: 100px; padding: 2px 12px; }
.dm-kind { font: 500 12px/18px "Roboto", sans-serif; color: #5f6672; }
.dm-card h3 { margin: 6px 0 0; font: 600 18px/1.4 "Commissioner", sans-serif; }
.dm-skill { margin: 0; color: #5f6672; font-size: 14px; line-height: 1.5; }
.dm-meta { display: flex; gap: 16px; margin: 4px 0 8px; font-size: 14px; color: #5f6672; }
.dm-meta b { color: #222; font-family: "Commissioner", sans-serif; }
.dm-card .btn { margin-top: auto; align-self: flex-start; }
@media (max-width: 960px) { .dm-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .dm-grid { grid-template-columns: minmax(0, 1fr); } }

/* Giãn dòng cho khối chữ dài (02/11/2026): đoạn văn 1.75, khoảng cách đoạn rộng hơn – dễ đọc.
   Tiêu đề, menu, nút giữ nguyên thang chữ. */
article p, article li, .theory p, .theory li, .kt-content p, .kt-content li,
.b1-text p, .h-intro .lead, .about-grid p, .card > p, .page-banner p, .kt-intro p { line-height: 1.75; }
article p, .theory p, .kt-content p, .about-grid p { margin: 0 0 1.15em; }
article h2, article h3, .kt-content h2, .kt-content h3 { line-height: 1.3; }
article h2 + p, article h3 + p { margin-top: .4em; }
.timeline > div { line-height: 1.65; }

/* Chân trang gọn hơn (03/11/2026): người dùng "footer giãn dòng ít hơn cho gọn"; đã bỏ đoạn giới thiệu trong .ft-brand (app.js) */
.site-footer.ft { line-height: 1.45; }
.ft-main { gap: 32px; padding: 36px 0 28px; }
.ft-logo { margin-bottom: 12px; }
.ft-col h4 { margin: 4px 0 10px; }
.ft-col ul { gap: 6px; }
.ft-hotline { margin-bottom: 10px; }
.ft-hotline svg { width: 36px; height: 36px; padding: 9px; }
.ft-bottom .container { padding: 12px 0; }
@media (max-width: 760px) {
  .site-footer .ft-main { gap: 16px 16px !important; padding: 20px 0 !important; }
  .ft-col ul { gap: 4px; }
  .ft-bottom .container { gap: 4px; }
}

/* Logo VHV (biểu tượng VHV + sách + sao) thay ô chữ "V" – 03/11/2026 */
.logo img.logo-mark { width: 48px; height: 48px; border-radius: 0; background: none; object-fit: contain; }
.logo-txt b { color: #0b2e94; }
.ft-logo img.logo-mark { width: 52px; height: 52px; padding: 4px; border-radius: 12px; background: #fff; object-fit: contain; }
@media (max-width: 600px) { .logo img.logo-mark { width: 40px; height: 40px; } }

/* Chân trang: logo gốc dạng vuông (03/11/2026) – ảnh logo-vhv-vuong.webp nền trắng, có chữ VƯƠNG HỮU VĨNH */
.ft-logo { gap: 16px; }
.ft-logo img.ft-logo-sq { width: 96px; height: 96px; padding: 0; border-radius: 14px; background: #fff; object-fit: cover; }
@media (max-width: 760px) { .ft-logo img.ft-logo-sq { width: 80px; height: 80px; } }