/* Be Vietnam Pro, SIL Open Font License, tự lưu trên site */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(font/be-vietnam-pro-400-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(font/be-vietnam-pro-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(font/be-vietnam-pro-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(font/be-vietnam-pro-600-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(font/be-vietnam-pro-600-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(font/be-vietnam-pro-600-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(font/be-vietnam-pro-700-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(font/be-vietnam-pro-700-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(font/be-vietnam-pro-700-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url(font/be-vietnam-pro-800-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url(font/be-vietnam-pro-800-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url(font/be-vietnam-pro-800-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Bố cục: sổ tay hành trình, căn trái, mã hạng chứng chỉ (T3, M3, B, C1...) là điểm nhấn chữ */
:root {
  --bg: #ffffff;
  --bg-2: #f1f5fa;
  --surface: #ffffff;
  --ink: #0d1b31;
  --ink-2: #3b4a62;
  --muted: #56657d;
  --line: #d9e2ee;
  --heading: #0b2a4f;
  --accent: #1d6bc9;
  --accent-ink: #ffffff;
  --tint: #e7f0fb;
  --brand-band: #0b2a4f;
  --brand-band-2: #081f3c;
  --on-band: #ffffff;
  --on-band-2: #b9cbe3;
  --buoy: #c2410c;
  --on-buoy: #ffffff;
  --hold-bg: #fff1c7;
  --hold-ink: #7a4f00;
  --ok: #1f7a4d;
  --photo-shade: rgba(6, 22, 45, 0.86);
  --photo-shade-2: rgba(6, 22, 45, 0.25);
  --shadow: 0 10px 30px rgba(11, 42, 79, 0.10);
  --qr-bg: #ffffff;

  --font: "Be Vietnam Pro", "Segoe UI", system-ui, -apple-system, sans-serif;
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.25rem;
  --fs-xl: clamp(1.5rem, 1.1rem + 1.6vw, 2.125rem);
  --fs-2xl: clamp(2rem, 1.3rem + 3vw, 3.25rem);
  --r: 10px;
  --gutter: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a1424; --bg-2: #0e1b30; --surface: #111f36; --ink: #e5ecf6; --ink-2: #b6c3d6;
    --muted: #8696ae; --line: #223453; --heading: #dbe8f8; --accent: #5aa0ee; --accent-ink: #06162d;
    --tint: #13294a; --brand-band: #071833; --brand-band-2: #050f22; --on-band: #ffffff; --on-band-2: #a9bcd6;
    --buoy: #ff8a4c; --on-buoy: #1a0b00; --hold-bg: #3b2d08; --hold-ink: #f2c75c; --ok: #4fc58a;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a1424; --bg-2: #0e1b30; --surface: #111f36; --ink: #e5ecf6; --ink-2: #b6c3d6;
  --muted: #8696ae; --line: #223453; --heading: #dbe8f8; --accent: #5aa0ee; --accent-ink: #06162d;
  --tint: #13294a; --brand-band: #071833; --brand-band-2: #050f22; --on-band: #ffffff; --on-band-2: #a9bcd6;
  --buoy: #ff8a4c; --on-buoy: #1a0b00; --hold-bg: #3b2d08; --hold-ink: #f2c75c; --ok: #4fc58a;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  z-index: 70;
  background: var(--surface);
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); }
h1, h2, h3 { color: var(--heading); text-wrap: balance; line-height: 1.18; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.nw { white-space: nowrap; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap {
  max-width: 1200px;
  margin-inline: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter-r);
}
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 90;
  background: var(--accent); color: var(--accent-ink); padding: 10px 16px; border-radius: 8px;
}
.skip:focus { top: 12px; }

/* Thông tin chờ KVC xác nhận */
.cd {
  background: var(--hold-bg);
  color: var(--hold-ink);
  border-bottom: 1.5px dashed currentColor;
  border-radius: 3px;
  padding-inline: 4px;
}
.an-danh-dau .cd { background: none; color: inherit; border-bottom: 0; padding: 0; }
.chi-duyet { background: var(--hold-bg); color: var(--hold-ink); border-radius: var(--r); padding: 12px 16px; font-size: var(--fs-xs); margin-top: 20px; }
.an-danh-dau .chi-duyet, .an-danh-dau .duyet-an { display: none; }
.duyet {
  background: var(--hold-bg);
  color: var(--hold-ink);
  font-size: var(--fs-xs);
}
.duyet .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 16px; padding-block: 8px; }
.duyet button {
  font: inherit; font-weight: 700; color: inherit; background: none;
  border: 1.5px solid currentColor; border-radius: 999px; padding: 3px 12px; cursor: pointer;
}

/* Đầu trang */
.dau {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 60;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.dau .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--heading); flex-shrink: 0; }
.logo svg { width: 40px; height: 40px; }
.logo b { font-size: 1.5rem; font-weight: 800; letter-spacing: 0.02em; line-height: 1; }
.logo small { display: block; font-size: 0.6875rem; font-weight: 600; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-top: 3px; }
.menu { margin-left: auto; }
.menu ul { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0; }
.menu a {
  display: block; padding: 10px 12px; border-radius: 8px;
  color: var(--ink-2); font-size: var(--fs-sm); font-weight: 600; text-decoration: none;
}
.menu a:hover, .menu a[aria-current="page"] { color: var(--accent); background: var(--tint); }
.goi {
  display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0;
  background: var(--accent); color: var(--accent-ink); text-decoration: none;
  font-weight: 700; font-size: var(--fs-sm); padding: 10px 18px; border-radius: 999px;
}
.goi svg { width: 16px; height: 16px; }
.nut-menu {
  display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--heading); cursor: pointer;
  align-items: center; justify-content: center;
}
.nut-menu svg { width: 22px; height: 22px; }

/* Nút */
.nut {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 24px; border-radius: 999px;
  font: 700 var(--fs-sm) / 1.2 var(--font); text-decoration: none; cursor: pointer; border: 0;
  transition: transform 0.15s ease, background-color 0.15s ease;
}
.nut:hover { transform: translateY(-1px); }
.nut:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.nut-chinh { background: var(--accent); color: var(--accent-ink); }
.nut-vien { background: transparent; color: var(--on-band); box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, 0.55); }
.nut-phu { background: var(--tint); color: var(--accent); }
.nut svg { width: 18px; height: 18px; }

/* Mã hạng */
.ma {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 2.4em; padding: 2px 8px; border-radius: 6px;
  border: 1.5px solid var(--accent); color: var(--accent);
  font-weight: 800; font-size: var(--fs-xs); letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums; text-decoration: none; background: var(--surface);
}
.ma-dac { background: var(--accent); color: var(--accent-ink); }

/* Mở đầu */
.mo-dau { position: relative; isolation: isolate; color: var(--on-band); background: var(--brand-band-2); }
.mo-dau > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.mo-dau::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(100deg, var(--photo-shade) 0%, var(--photo-shade) 38%, var(--photo-shade-2) 100%);
}
.mo-dau .wrap {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr); gap: 48px; align-items: end;
  padding-block: 56px 48px;
}
.toa-do { font-size: var(--fs-xs); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-band-2); margin-bottom: 18px; }
.mo-dau h1 { color: var(--on-band); font-size: var(--fs-2xl); font-weight: 800; letter-spacing: -0.02em; max-width: 16ch; }
.mo-dau .dan { font-size: var(--fs-md); color: var(--on-band-2); max-width: 54ch; margin-top: 18px; }
.mo-dau .hang-nut { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.bang-tra {
  background: rgba(5, 18, 38, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  padding: 22px;
  backdrop-filter: blur(6px);
}
.bang-tra h2 { color: var(--on-band); font-size: var(--fs-md); font-weight: 700; }
.bang-tra p.ghi { color: var(--on-band-2); font-size: var(--fs-xs); margin-top: 4px; }
.nhom-ma { margin-top: 16px; display: grid; gap: 12px; }
.nhom-ma span.nhan { display: block; font-size: 0.6875rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--on-band-2); margin-bottom: 6px; font-weight: 700; }
.nhom-ma .cac-ma { display: flex; flex-wrap: wrap; gap: 6px; }
.bang-tra .ma { background: transparent; color: var(--on-band); border-color: rgba(255, 255, 255, 0.45); min-height: 40px; padding: 4px 12px; }
.duyet button { min-height: 36px; }
.bang-tra .ma:hover { background: var(--on-band); color: var(--brand-band-2); }

/* Dải cập nhật quy định */
.cap-nhat { background: var(--brand-band); color: var(--on-band); }
.cap-nhat .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding-block: 14px; font-size: var(--fs-sm); }
.cap-nhat b.nhan-moi { background: var(--buoy); color: var(--on-buoy); border-radius: 4px; padding: 1px 8px; font-size: var(--fs-xs); letter-spacing: 0.06em; }
.cap-nhat a { color: var(--on-band); font-weight: 700; }

/* Khối nội dung */
.khoi { padding-block: 36px; }
.khoi-2 { background: var(--bg-2); }
.dau-khoi { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px 40px; margin-bottom: 20px; }
.dau-khoi > div { max-width: 720px; min-width: 0; }
.nhan-khoi { font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.dau-khoi h2 { font-size: var(--fs-xl); font-weight: 800; }
.dau-khoi p { color: var(--ink-2); margin-top: 12px; max-width: 62ch; }
.can-cu { font-size: var(--fs-xs); color: var(--muted); }
.can-cu a { color: var(--muted); }
.tieu-nhom { display: flex; align-items: baseline; gap: 12px; font-size: var(--fs-lg); font-weight: 800; margin: 40px 0 16px; }
.tieu-nhom:first-of-type { margin-top: 0; }
.tieu-nhom small { font-size: var(--fs-xs); font-weight: 600; color: var(--muted); }

/* Thẻ khóa học */
.luoi { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: start; }
.the {
  display: flex; flex-direction: column; min-width: 0;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
  scroll-margin-top: 96px;
}
.the:target { box-shadow: 0 0 0 3px var(--accent); }
.the figure { margin: 0; aspect-ratio: 16 / 9; overflow: hidden; background: var(--tint); }
.the figure img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.the:hover figure img { transform: scale(1.04); }
.than-the { display: flex; flex-direction: column; gap: 10px; padding: 18px 18px 20px; flex: 1; }
.the .cac-ma { display: flex; flex-wrap: wrap; gap: 6px; }
.the h3 { font-size: var(--fs-md); font-weight: 700; }
.the p.mo-ta { color: var(--ink-2); font-size: var(--fs-sm); }
.so-lieu { display: grid; grid-template-columns: fit-content(40%) minmax(0, 1fr); gap: 6px 14px; margin: 4px 0 0; font-size: var(--fs-sm); }
.so-lieu dt { color: var(--muted); }
.so-lieu dd { margin: 0; color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.the .nguon { margin-top: 2px; padding-top: 10px; border-top: 1px dashed var(--line); font-size: var(--fs-xs); color: var(--muted); }
.the .nguon a { color: var(--muted); }

/* Trường */
.truong { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.ho-so-truong { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 24px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.dau-truong { display: flex; gap: 16px; align-items: center; }
.dau-truong img { width: 72px; height: 72px; object-fit: contain; border-radius: 50%; background: #ffffff; padding: 3px; flex-shrink: 0; border: 1px solid var(--line); }
.dau-truong h3 { font-size: var(--fs-lg); font-weight: 800; }
.dau-truong p { font-size: var(--fs-xs); color: var(--muted); margin-top: 4px; }
.ho-so-truong h4 { margin: 0 0 6px; font-size: var(--fs-md); font-weight: 700; color: var(--heading); }
.ho-so-truong ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; font-size: var(--fs-sm); color: var(--ink-2); }
.cuon { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table.bang { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); font-variant-numeric: tabular-nums; }
.bang th, .bang td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.bang thead th { background: var(--bg-2); color: var(--heading); font-size: var(--fs-sm); font-weight: 700; }
.bang tr:last-child td { border-bottom: 0; }
.bang td.so { text-align: right; white-space: nowrap; font-weight: 700; }
.bang th[scope="row"] { white-space: nowrap; color: var(--heading); }
table.bang-rong { min-width: 40rem; }

/* Quy trình */
.quy-trinh { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; counter-reset: buoc; }
.quy-trinh li { counter-increment: buoc; border-top: 3px solid var(--accent); padding-top: 16px; min-width: 0; }
.quy-trinh li::before { content: "Bước " counter(buoc); display: block; font-size: var(--fs-xs); font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.quy-trinh h3 { font-size: var(--fs-md); font-weight: 700; margin-top: 6px; }
.quy-trinh p { font-size: var(--fs-sm); color: var(--ink-2); margin-top: 6px; }
.ho-so { margin-top: 32px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.ho-so > div { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; min-width: 0; }
.ho-so h3 { font-size: var(--fs-md); font-weight: 700; margin-bottom: 10px; }
.ho-so ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; font-size: var(--fs-sm); color: var(--ink-2); }

/* Hỏi đáp */
.hoi-dap { display: grid; gap: 10px; }
.hoi-dap details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); transition: border-color .15s; }
.hoi-dap details[open] { border-color: var(--accent); }
.hoi-dap summary {
  cursor: pointer; list-style: none; padding: 16px 56px 16px 20px; position: relative;
  font-weight: 700; color: var(--heading); font-size: var(--fs-md); line-height: 1.4;
}
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after {
  content: "+"; position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%;
  background: var(--tint); font-size: 1.25rem; font-weight: 500; line-height: 1; color: var(--accent);
}
.hoi-dap details[open] summary::after { content: "−"; }
/* trả lời trong hỏi đáp: không kế thừa khung của ô trả lời nhanh đầu trang */
.hoi-dap .tra-loi {
  margin: 0; max-width: none; background: none; border: 0; border-radius: 0;
  border-top: 1px solid var(--line); padding: 14px 20px 18px;
  color: var(--ink-2); font-size: var(--fs-sm); display: grid; gap: 8px;
}
.hoi-dap .tra-loi > * { max-width: 75ch; }

/* Tin tức */
.tin { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.tin article { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; min-width: 0; }
.tin figure { margin: 0; aspect-ratio: 16 / 10; overflow: hidden; }
.tin figure img { width: 100%; height: 100%; object-fit: cover; }
.tin .than-tin { padding: 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.tin time { font-size: var(--fs-xs); font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.tin h3 { font-size: var(--fs-sm); font-weight: 700; line-height: 1.4; }
.tin p { font-size: var(--fs-xs); color: var(--ink-2); }
.tin a.doc { margin-top: auto; font-size: var(--fs-xs); font-weight: 700; }

/* Đăng ký */
.dang-ky .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: start; }
.lien-he-nhanh { display: grid; gap: 14px; margin-top: 24px; }
.lien-he-nhanh div { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 10px; font-size: var(--fs-sm); }
.lien-he-nhanh dt { color: var(--muted); }
.lien-he-nhanh dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
form.mau { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 24px; display: grid; gap: 14px; box-shadow: var(--shadow); }
.o { display: grid; gap: 6px; }
.o label { font-size: var(--fs-sm); font-weight: 600; color: var(--heading); }
.o input, .o select, .o textarea {
  font: 400 1rem/1.4 var(--font); color: var(--ink); background: var(--bg);
  border: 1.5px solid var(--line); border-radius: 8px; padding: 12px 14px; min-height: 48px; width: 100%;
}
.o select {
  -webkit-appearance: none; appearance: none; height: 48px; padding-right: 40px; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%236b7890' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 16px center;
}
.o textarea { min-height: 112px; resize: vertical; }
.o input:focus, .o select:focus, .o textarea:focus { border-color: var(--accent); }
.dong-y { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; font-size: var(--fs-xs); color: var(--ink-2); align-items: start; }
.dong-y input { width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--accent); }
.bao { font-size: var(--fs-sm); font-weight: 600; color: var(--ok); }
.zalo-qr {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px 20px; align-items: center;
  margin: 24px 0 0; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
}
.zalo-qr img { width: 140px; height: 140px; background: var(--qr-bg); padding: 6px; border-radius: 8px; border: 1px solid var(--line); }
.zalo-qr figcaption { display: grid; gap: 6px; font-size: var(--fs-sm); color: var(--ink-2); min-width: 0; }
.zalo-qr figcaption b { color: var(--heading); font-size: var(--fs-md); }
.zalo-qr .nut { justify-self: start; margin-top: 4px; }
.qr-nho { width: 112px; height: 112px; background: var(--qr-bg); padding: 6px; border-radius: 8px; margin-top: 14px; }

/* Cuối trang */
.cuoi { background: var(--brand-band-2); color: var(--on-band-2); font-size: var(--fs-sm); }
.cuoi .wrap { padding-block: 40px 24px; }
.cuoi a { color: var(--on-band); text-decoration: none; }
.cuoi a:hover { text-decoration: underline; }
.cuoi-luoi { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr); gap: 40px; }
.cuoi ul a { display: inline-block; line-height: 1.45; }
.cuoi-luoi p a { text-decoration: underline; text-underline-offset: 3px; }
.cuoi-luoi > div { min-width: 0; }
.cuoi h2 { color: var(--on-band); font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 14px; }
.cuoi ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.cuoi .logo { color: var(--on-band); margin-bottom: 14px; }
.cuoi .logo small { color: var(--on-band-2); }
.cuoi .cd { color: var(--hold-ink); }
.duoi { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; border-top: 1px solid rgba(255, 255, 255, 0.12); margin-top: 40px; padding-top: 20px; font-size: var(--fs-xs); }

/* Thanh gọi nhanh trên điện thoại */
.thanh-goi { display: none; }
.zalo-noi {
  position: fixed; z-index: 55;
  right: calc(18px + env(safe-area-inset-right, 0px)); bottom: calc(18px + env(safe-area-inset-bottom, 0px));
  width: 56px; height: 56px; border-radius: 50%; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; box-shadow: var(--shadow); text-decoration: none; font-weight: 800; font-size: 0.8125rem;
}

/* Trang pháp lý */
.phap-ly { padding-block: 32px 40px; }
.phap-ly .noi-dung { max-width: 780px; }
.chip-hang { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.chip-hang a { display: inline-flex; align-items: center; min-height: 44px; font-size: var(--fs-sm); font-weight: 600; text-decoration: none; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px; background: var(--surface); }
.chip-hang a[aria-current="page"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.phap-ly h1 { font-size: var(--fs-xl); font-weight: 800; }
.phap-ly .moc { font-size: var(--fs-xs); color: var(--muted); margin-top: 8px; }
.phap-ly .dan { font-size: var(--fs-md); color: var(--ink); margin-top: 18px; }
.phap-ly h2 { font-size: var(--fs-lg); font-weight: 800; margin-top: 36px; }
.phap-ly h3 { font-size: var(--fs-md); font-weight: 700; margin-top: 20px; }
.phap-ly p, .phap-ly li { color: var(--ink-2); margin-top: 10px; }
.phap-ly ul, .phap-ly ol { padding-left: 20px; margin: 0; }
.phap-ly .tom-tat { background: var(--tint); border-radius: var(--r); padding: 16px 18px; margin-top: 22px; color: var(--ink); }
.phap-ly .can-cu-pl { font-size: var(--fs-xs); color: var(--muted); margin-top: 32px; border-top: 1px solid var(--line); padding-top: 16px; }
.phap-ly dl { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 10px 16px; margin-top: 16px; }
.phap-ly dt { color: var(--muted); }
.phap-ly dd { margin: 0; font-weight: 600; color: var(--ink); overflow-wrap: anywhere; }

/* Điện thoại và máy tính bảng */
@media (max-width: 1080px) {
  .menu {
    position: absolute; left: 0; right: 0; top: 100%;
    max-height: calc(100vh - 140px); overflow-y: auto;
    background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    padding: 8px var(--gutter-r) 16px var(--gutter); display: none;
  }
  .menu.mo { display: block; }
  .menu ul { flex-direction: column; }
  .menu a { padding: 14px 12px; font-size: var(--fs-md); }
  .nut-menu { display: inline-flex; }
  .dau .goi { display: none; }
  .luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tin { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quy-trinh { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cuoi-luoi { grid-template-columns: 1fr 1fr; }
  .mo-dau .wrap { grid-template-columns: 1fr; gap: 32px; }
  .truong { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .khoi { padding-block: 28px; }
  .mo-dau .wrap { padding-block: 44px 40px; }
  .mo-dau::after { background: linear-gradient(180deg, var(--photo-shade) 0%, var(--photo-shade) 100%); }
  .luoi, .tin, .quy-trinh, .ho-so, .dang-ky .wrap, .cuoi-luoi { grid-template-columns: 1fr; }
  .dau-khoi { margin-bottom: 16px; }
  .the figure { aspect-ratio: 16 / 8; }
  .logo small { display: none; }
  .lien-he-nhanh div { grid-template-columns: 1fr; gap: 2px; }
  .phap-ly dl { grid-template-columns: 1fr; gap: 2px; }
  .phap-ly dd { margin-bottom: 10px; }
  .zalo-noi { display: none; }
  .zalo-qr { grid-template-columns: 1fr; justify-items: start; }
  .bang-tra .ma { min-height: 44px; }
  .thanh-goi {
    display: grid; grid-template-columns: 1fr 1fr 1.4fr; gap: 8px;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 65;
    background: var(--surface); border-top: 1px solid var(--line);
    padding: 8px var(--gutter-r) calc(8px + env(safe-area-inset-bottom, 0px)) var(--gutter);
  }
  .thanh-goi a { min-height: 48px; font-size: var(--fs-sm); padding: 10px 8px; }
  body { padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px)); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* Trang nội dung nhiều trang */
.vun ol { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 8px; font-size: var(--fs-xs); color: var(--muted); }
.vun li + li::before { content: "/"; margin-right: 8px; color: var(--line); }
.vun a { color: var(--muted); }
.dau-con { background: var(--bg-2); border-bottom: 1px solid var(--line); }
.dau-con .wrap { padding-block: 22px 28px; }
.dau-con-luoi { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; align-items: center; }
.dau-con h1 { font-size: var(--fs-2xl); font-weight: 800; letter-spacing: -0.02em; }
.tra-loi { margin-top: 16px; font-size: var(--fs-md); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; max-width: 70ch; }
.moc-cap-nhat { margin-top: 10px; font-size: var(--fs-xs); color: var(--muted); }
.moc-cap-nhat a { color: var(--muted); }
.anh-dau { margin: 0; border-radius: var(--r); overflow: hidden; aspect-ratio: 3 / 2; }
.anh-dau img { width: 100%; height: 100%; object-fit: cover; }
.dau-con .hang-nut { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
/* Thân trang con: hai cột chung trục với đầu trang */
.than-trang { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 48px; align-items: start; padding-block: 28px 32px; }
.noi-dung-trang { min-width: 0; }
.ben { position: sticky; top: 88px; }
.ben-dinh { display: grid; gap: 16px; }
.ben-tieu { font-size: var(--fs-xs); font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
.muc-luc { border-left: 2px solid var(--line); padding-left: 16px; }
.muc-luc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.muc-luc a { font-size: var(--fs-sm); color: var(--ink-2); text-decoration: none; line-height: 1.4; display: block; }
.muc-luc a:hover { color: var(--accent); }
.the-tv { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.so-tv { font-size: var(--fs-lg, 1.375rem); font-weight: 800; color: var(--heading); font-variant-numeric: tabular-nums; }
.gio-tv { font-size: var(--fs-xs); color: var(--muted); margin-top: 2px; }
.nut-tv { display: grid; gap: 8px; margin-top: 14px; }
.nut-tv .nut { justify-content: center; text-align: center; }
.muc { margin-bottom: 28px; scroll-margin-top: 96px; }
.muc:last-child { margin-bottom: 0; }
.muc .hoi-dap { margin-top: 4px; }
.hoi-dap .tra-loi-hd { border-top: 1px solid var(--line); padding: 14px 20px 18px; color: var(--ink-2); font-size: var(--fs-sm); display: grid; gap: 8px; }
.hoi-dap .tra-loi-hd > * { max-width: 75ch; }
.noi-dung-trang .luoi-lq { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.noi-dung-trang th { white-space: nowrap; }
.noi-dung-trang td:last-child a { white-space: nowrap; }
.muc h2 { font-size: var(--fs-xl); font-weight: 800; margin-bottom: 12px; }
.muc h3 { font-size: var(--fs-md); font-weight: 700; margin: 18px 0 6px; }
.muc p, .muc li { color: var(--ink-2); }
.muc p + p, .muc .cuon, .muc ul, .muc ol, .muc .luu-y, .muc .can-cu { margin-top: 12px; }
.muc ul, .muc ol:not(.quy-trinh) { padding-left: 20px; display: grid; gap: 6px; }
.muc .quy-trinh { margin-top: 16px; }
.luu-y { background: var(--hold-bg); color: var(--hold-ink); border-radius: var(--r); padding: 12px 16px; font-size: var(--fs-sm); }
.an-danh-dau .luu-y { display: block; }
.anh-muc { margin: 16px 0 0; }
.anh-muc img { border-radius: var(--r); width: 100%; height: auto; }
.anh-muc figcaption { font-size: var(--fs-xs); color: var(--muted); margin-top: 6px; }
.anh-muc.logo-truong img { width: 120px; height: 120px; object-fit: contain; background: var(--qr-bg); border: 1px solid var(--line); border-radius: 50%; padding: 4px; }
.tieu-muc { font-size: var(--fs-xl); font-weight: 800; margin-bottom: 20px; }
.luoi-lq { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.luoi-lq a { display: grid; gap: 4px; height: 100%; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); text-decoration: none; color: var(--ink-2); font-size: var(--fs-sm); }
.luoi-lq a:hover { border-color: var(--accent); }
.luoi-lq b { color: var(--heading); font-size: var(--fs-md); }
.cta-lh { padding-block: 32px; }
.cta-luoi { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.cta-luoi h2 { font-size: var(--fs-xl); font-weight: 800; text-wrap: balance; }
.cta-chu p { max-width: 52ch; }
.cta-luoi p { margin-top: 10px; color: var(--ink-2); }
.cta-luoi .hang-nut { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.cta-luoi .zalo-qr { margin: 0; }
.the h3 a { color: inherit; text-decoration: none; }
.the h3 a:hover { color: var(--accent); text-decoration: underline; }
.xem-them { font-size: var(--fs-sm); font-weight: 700; }
.ds-cau { padding-left: 22px; display: grid; gap: 14px; }
.ds-cau .cau-hoi { font-weight: 600; color: var(--heading); }
.lua-chon { list-style: none; padding-left: 0; margin-top: 6px; display: grid; gap: 4px; font-size: var(--fs-sm); }
.lua-chon li.dung { color: var(--ok); font-weight: 600; }
@media (max-width: 1080px) {
  .luoi-lq { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .than-trang { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .ben { display: none; }
  .cta-luoi { gap: 28px; }
}
@media (max-width: 680px) {
  .dau-con-luoi, .cta-luoi { grid-template-columns: 1fr; }
  .luoi-lq, .noi-dung-trang .luoi-lq { grid-template-columns: 1fr; }
  .than-trang { padding-block: 20px 24px; }
  .cta-lh { padding-block: 24px; }
  .dau-con h1 { font-size: 1.75rem; }
}

.dong-y-ghi { font-size: var(--fs-xs); color: var(--muted); }
.bay { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* Cổng nhập họ tên, số điện thoại (thi thử, tải giáo trình) */
.kvc-cong { border: 0; border-radius: 16px; padding: 0; width: min(440px, calc(100vw - 32px)); background: var(--surface); color: var(--ink); box-shadow: 0 24px 60px rgba(6, 22, 45, 0.35); }
.kvc-cong::backdrop { background: rgba(6, 22, 45, 0.55); }
.kvc-cong-form { display: grid; gap: 14px; padding: 24px; }
.kvc-cong h2 { font-size: var(--fs-lg); font-weight: 800; color: var(--heading); }
.kvc-cong-dan { font-size: var(--fs-sm); color: var(--ink-2); }
.kvc-cong-loi { font-size: var(--fs-sm); font-weight: 600; color: var(--buoy); min-height: 1em; }
.kvc-cong-loi:empty { display: none; }
.kvc-cong-nut { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.kvc-cong-bm { font-size: var(--fs-xs); color: var(--muted); }

/* Giáo trình tải về */
.gt-luoi { list-style: none; margin: 16px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.gt-the { display: flex; flex-direction: column; gap: 10px; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); min-width: 0; }
.gt-dau h3 { font-size: var(--fs-md); font-weight: 700; color: var(--heading); margin: 0; line-height: 1.35; }
.gt-meta { font-size: var(--fs-xs); color: var(--muted); margin-top: 4px; font-variant-numeric: tabular-nums; }
.gt-ml summary { cursor: pointer; font-size: var(--fs-sm); font-weight: 600; color: var(--accent); }
.gt-ml ol { margin: 8px 0 0; padding-left: 20px; display: grid; gap: 4px; font-size: var(--fs-sm); color: var(--ink-2); }
.gt-the .tai-gt { margin-top: auto; justify-content: center; text-align: center; }
@media (max-width: 680px) { .gt-luoi { grid-template-columns: 1fr; } }

/* Xếp thẻ kiểu gạch so le: thẻ ngắn không để lại khoảng trống giữa các hàng (kvc.js tính số ô cho từng thẻ) */
.luoi.gach { grid-auto-rows: 4px; row-gap: 0; align-items: start; }

/* Bảng số liệu ngắn (giờ học, học phí): số liệu nằm một dòng, canh phải như bảng giá; nhãn dài tự xuống dòng */
.so-lieu.gon { grid-template-columns: minmax(0, 1fr) max-content; gap: 0 16px; }
.so-lieu.gon dt, .so-lieu.gon dd { padding: 7px 0; border-bottom: 1px solid var(--line); }
.so-lieu.gon dt:last-of-type, .so-lieu.gon dd:last-of-type { border-bottom: 0; }
.so-lieu.gon dd { white-space: nowrap; text-align: right; }

/* Lưới thẻ trong bài (Xem tiếp, giáo trình): không thụt lề như danh sách thường, nội dung bám đỉnh thẻ */
.muc .luoi-lq, .muc .gt-luoi { padding-left: 0; list-style: none; }
.luoi-lq { gap: 10px; margin-top: 4px; }
.luoi-lq li { min-width: 0; }
.luoi-lq a { align-content: start; gap: 2px; padding: 12px 14px; line-height: 1.45; }
.luoi-lq b { font-size: var(--fs-sm); }
.luoi-lq span { font-size: var(--fs-xs); color: var(--muted); }
.noi-dung-trang .luoi-lq li:last-child:nth-child(odd) { grid-column: 1 / -1; }

/* Dải kêu gọi thi thử: nền thương hiệu, nút chính lớn, chọn nhanh bộ đề */
.thi-thu-cta {
  margin-top: 24px; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 24px 40px; align-items: center;
  padding: 28px 32px; border-radius: 16px; color: var(--on-band);
  background: radial-gradient(120% 140% at 100% 0%, var(--accent) 0%, var(--brand-band) 58%);
  box-shadow: var(--shadow);
}
.tt-cta-nhan { display: inline-block; font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--brand-band); background: var(--hold-bg); padding: 4px 10px; border-radius: 99px; }
.thi-thu-cta h3 { font-size: var(--fs-xl); font-weight: 800; line-height: 1.2; margin: 12px 0 8px; color: var(--on-band); text-wrap: balance; }
.tt-cta-chu > p:not(.tt-cta-nhan) { color: var(--on-band-2); max-width: 56ch; }
.tt-cta-so { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 28px; }
.tt-cta-so li { display: grid; }
.tt-cta-so b { font-size: 1.75rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.tt-cta-so span { font-size: var(--fs-xs); color: var(--on-band-2); margin-top: 4px; }
.tt-cta-hanh-dong { display: grid; gap: 10px; }
.thi-thu-cta .tt-cta-nut { justify-content: center; text-align: center; font-size: var(--fs-md); padding: 16px 24px; min-height: 56px;
  background: var(--hold-bg); color: var(--brand-band); border: 0; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25); transition: transform .15s, box-shadow .15s; }
.thi-thu-cta .tt-cta-nut:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3); text-decoration: none; }
.tt-cta-chon { font-size: var(--fs-xs); color: var(--on-band-2); margin-top: 4px; }
.tt-cta-bo { display: flex; flex-wrap: wrap; gap: 8px; }
.tt-cta-bo a { color: var(--on-band); text-decoration: none; font-size: var(--fs-sm); font-weight: 700; padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.35); border-radius: 8px; }
.tt-cta-bo a:hover { background: rgba(255, 255, 255, 0.14); }
@media (max-width: 860px) { .thi-thu-cta { grid-template-columns: 1fr; padding: 22px 20px; } }
@media (prefers-reduced-motion: reduce) { .thi-thu-cta .tt-cta-nut { transition: none; } }
.ho-so { align-items: stretch; }

/* Nút Thi thử trên menu: nổi bật để kéo người đọc vào làm bài */
.menu a.menu-thi { display: inline-flex; align-items: center; gap: 7px; margin-left: 6px;
  background: var(--hold-bg); color: var(--brand-band); border: 1px solid rgba(122, 79, 0, 0.25); }
.menu a.menu-thi:hover, .menu a.menu-thi[aria-current="page"] { background: var(--hold-bg); color: var(--brand-band); box-shadow: 0 0 0 3px rgba(242, 199, 90, 0.35); }
.menu-thi small { font-size: 0.6875rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--accent-ink); background: var(--ok); padding: 2px 6px; border-radius: 99px; }
.menu-thi .cham { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 0 rgba(31, 122, 77, 0.6); animation: nhay-cham 1.8s ease-out infinite; }
@keyframes nhay-cham { 0% { box-shadow: 0 0 0 0 rgba(31, 122, 77, 0.55); } 80%, 100% { box-shadow: 0 0 0 8px rgba(31, 122, 77, 0); } }
.thi-nhanh { display: none; }
@media (max-width: 1080px) {
  .menu a.menu-thi { margin: 6px 0 0; justify-content: flex-start; }
  .thi-nhanh { display: inline-flex; align-items: center; margin-left: auto; padding: 9px 14px; border-radius: 99px;
    background: var(--hold-bg); color: var(--brand-band); font-weight: 800; font-size: var(--fs-sm); text-decoration: none;
    border: 1px solid rgba(122, 79, 0, 0.25); }
  .thi-nhanh + .nut-menu { margin-left: 8px; }
}
@media (prefers-reduced-motion: reduce) { .menu-thi .cham { animation: none; } }
@media (min-width: 1081px) {
  .menu a { white-space: nowrap; padding: 9px 7px; }
  .menu-thi small { font-size: 0.625rem; padding: 2px 5px; }
  .dau .wrap { gap: 16px; }
}
@media (min-width: 1081px) and (max-width: 1300px) {
  .menu-thi small, .dau .logo small { display: none; }
  .menu a { padding: 9px 8px; }
  .dau .goi { padding: 10px 14px; }
}

/* Trang ngân hàng câu hỏi: hình và phần vấn đáp */
.hinh-cau { margin: 8px 0; padding: 8px; background: var(--qr-bg); border: 1px solid var(--line); border-radius: var(--r); display: inline-block; max-width: 100%; }
.hinh-cau img { max-width: 100%; max-height: 320px; width: auto; height: auto; }
.ds-cau details { margin-top: 6px; }
.ds-cau summary { cursor: pointer; color: var(--accent); font-weight: 600; font-size: var(--fs-sm); }
.vd-tieu { font-weight: 700; color: var(--ok); margin-top: 8px; font-size: var(--fs-sm); }
.vd-goi-y { white-space: pre-line; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.6; }