/* javis.bongwork.com — trang giới thiệu dịch vụ Bống Work trên nền Javis OS.
   Màu/chữ/thang khớp 08-Brand/design-system/BRAND_KIT.md: navy + teal, không màu thứ ba, không gradient.
   Khuôn kế thừa ../bong-hello/css/hello.css. */
/* Font tự phục vụ (tải từ Google Fonts 08/10, bộ vietnamese + latin) — không gọi Google lúc chạy, tránh chặn hiển thị. */
@font-face { font-family: "Be Vietnam Pro"; font-style: normal; font-weight: 400; font-display: swap; src: url("../assets/fonts/bvp-400-vie.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("../assets/fonts/bvp-400-lat.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: 500; font-display: swap; src: url("../assets/fonts/bvp-500-vie.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: 500; font-display: swap; src: url("../assets/fonts/bvp-500-lat.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("../assets/fonts/bvp-600-vie.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("../assets/fonts/bvp-600-lat.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("../assets/fonts/bvp-700-vie.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("../assets/fonts/bvp-700-lat.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("../assets/fonts/bvp-800-vie.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("../assets/fonts/bvp-800-lat.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: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("../assets/fonts/ipm-500-vie.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: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("../assets/fonts/ipm-500-lat.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; }

:root {
  --navy-950: #04122f; --navy-900: #061a42; --navy-800: #082054; --navy-700: #0d2c6c;
  --navy-300: #8aa4d8; --navy-200: #c2d0ea; --navy-100: #e3e9f6; --navy-50: #f2f5fb;
  --teal-700: #007b99; --teal-600: #0093b5; --teal-500: #00a9cc; --teal-300: #7ed3e8; --teal-100: #e0f4fa;
  --gray-900: #141a24; --gray-600: #4d5768; --gray-500: #6b7688; --gray-50: #f7f8fb;

  --bg: var(--gray-50); --fg: var(--gray-900); --heading: var(--navy-900); --muted: var(--gray-600);
  --line: var(--navy-100); --card: #fff;
  --font-sans: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap: 1200px; --gutter: 16px;
  --r-control: 10px; --r-card: 20px; --r-bubble: 18px;
  --shadow-1: 0 1px 2px rgba(8,32,84,.06), 0 4px 12px -4px rgba(8,32,84,.08);
  --shadow-2: 0 2px 4px rgba(8,32,84,.06), 0 16px 32px -12px rgba(8,32,84,.18);
  --ease: cubic-bezier(.2,.8,.26,1);
}
@media (min-width: 640px) { :root { --gutter: 24px; } }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--fg); overflow-x: clip;
  font: 400 16px/1.62 var(--font-sans); -webkit-font-smoothing: antialiased; text-wrap: pretty;
}
img, video { max-width: 100%; display: block; }
[hidden] { display: none !important; }
a { color: var(--teal-700); }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure, table { margin: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2, h3, h4 { color: var(--heading); text-wrap: balance; letter-spacing: -0.02em; }
h1 { font-size: clamp(34px, 6.4vw, 54px); font-weight: 800; line-height: 1.2; }
h2 { font-size: clamp(26px, 4.2vw, 36px); font-weight: 700; line-height: 1.22; }
h3 { font-size: 18px; font-weight: 600; line-height: 1.35; letter-spacing: -0.01em; }
h4 { font-size: 16px; font-weight: 600; line-height: 1.4; letter-spacing: 0; }
.mono { font-family: var(--font-mono); font-weight: 500; font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ic { width: 20px; height: 20px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 3px solid var(--teal-500); outline-offset: 3px; border-radius: 6px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.sect { padding-block: 56px; }
@media (min-width: 900px) { .sect { padding-block: 96px; } }
.sect-white { background: #fff; }
.sect-navy { background: var(--navy-800); color: var(--navy-100); }
.sect-navy h2, .sect-navy h3, .sect-navy h4 { color: #fff; }
.sect-head { max-width: 44rem; margin-bottom: 28px; }
@media (min-width: 900px) { .sect-head { margin-bottom: 40px; } }
.lead { margin-top: 14px; font-size: clamp(17px, 2.2vw, 19px); color: var(--muted); max-width: 68ch; }
.lead-onnavy { color: var(--navy-200); }
.note { margin-top: 20px; font-size: 14px; color: var(--gray-600); max-width: 68ch; }
.note-center { margin-inline: auto; text-align: center; }
.note-onnavy { color: var(--navy-300); }
.eyebrow { font: 500 12px/1.5 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--teal-700); margin-bottom: 14px; }
.eyebrow-onnavy { color: var(--teal-300); }

.skip { position: absolute; left: 12px; top: -60px; z-index: 50; padding: 10px 16px; background: #fff; color: var(--navy-800); border-radius: var(--r-control); font-weight: 600; }
.skip:focus { top: 12px; }

/* ---- Nút ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 24px; border-radius: 999px; border: 0; cursor: pointer;
  font: 600 16px/1.2 var(--font-sans); text-decoration: none; text-align: center;
  transition: background-color 140ms var(--ease), transform 140ms var(--ease), border-color 140ms var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-teal { background: var(--teal-500); color: var(--navy-950); }
.btn-teal:hover { background: var(--teal-300); }
.btn-navy { background: var(--navy-800); color: #fff; }
.btn-navy:hover { background: var(--navy-700); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(194,208,234,.4); }
.btn-ghost:hover { border-color: var(--navy-200); background: rgba(255,255,255,.06); }
.btn-outline { background: #fff; color: var(--navy-800); border: 1.5px solid var(--navy-200); }
.btn-outline:hover { border-color: var(--navy-800); }
.btn-onnavy { background: #fff; color: var(--navy-800); }
.btn-onnavy:hover { background: var(--navy-100); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cta-center { justify-content: center; }
@media (max-width: 479px) { .cta-row .btn { width: 100%; } }

/* ---- Header ---- */
.top { position: sticky; top: 0; z-index: 30; background: var(--navy-950); border-bottom: 1px solid rgba(194,208,234,.1); }
.top-in { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; font-size: 17px; line-height: 1.2; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.brand small { display: block; font-weight: 500; font-size: 12px; color: var(--navy-300); }
.top-nav { display: none; gap: 4px; margin-left: auto; }
.top-nav a { color: var(--navy-200); text-decoration: none; font-size: 15px; font-weight: 500; padding: 8px 12px; border-radius: var(--r-control); transition: color 140ms var(--ease); }
.top-nav a:hover { color: #fff; }
.top .btn { margin-left: auto; }
@media (max-width: 899px) { .top .btn { display: none; } }
@media (min-width: 900px) { .top-nav { display: flex; } .top .btn { margin-left: 8px; } }

/* ---- Hero ---- */
.hero { background: var(--navy-950); color: var(--navy-100); padding-block: 40px 56px; }
.hero h1 { color: #fff; }
.hero-in { display: grid; gap: 36px; align-items: center; }
.hero-sub { margin-top: 18px; font-size: clamp(17px, 2.3vw, 19px); color: var(--navy-200); max-width: 36em; }
.next { margin-top: 16px; font-size: 15px; color: var(--navy-300); max-width: 36em; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; font-size: 14px; color: var(--navy-200); }
.hero-facts li { display: inline-flex; align-items: center; gap: 8px; }
.hero-facts .ic { width: 18px; height: 18px; color: var(--teal-300); }
@media (min-width: 900px) {
  .hero { padding-block: 72px 96px; }
  .hero-in { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: 56px; }
}

/* Khung chat minh hoạ (hero + khối "đang chạy thật") */
.chat {
  background: var(--navy-900); border: 1px solid rgba(194,208,234,.14); border-radius: var(--r-card);
  padding: 20px; box-shadow: 0 24px 48px -20px rgba(0,0,0,.6); display: grid; gap: 12px;
}
.chat-head { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; border-bottom: 1px solid rgba(194,208,234,.12); color: #fff; font-weight: 600; font-size: 15px; }
.chat-head img { width: 32px; height: 32px; border-radius: 999px; }
.chat-head small { display: block; font-weight: 400; font-size: 12px; color: var(--navy-300); }
.msg { max-width: 92%; padding: 10px 14px; border-radius: var(--r-bubble); font-size: 15px; line-height: 1.5; }
.msg-me { justify-self: end; background: var(--teal-500); color: var(--navy-950); border-bottom-right-radius: 6px; }
.msg-bot { justify-self: start; background: rgba(255,255,255,.08); color: var(--navy-100); border-bottom-left-radius: 6px; }
.msg-bot strong { color: #fff; }
.msg-bot ul { margin-top: 6px; display: grid; gap: 4px; }
.msg-bot li { padding-left: 14px; position: relative; }
.msg-bot li::before { content: ""; position: absolute; left: 0; top: .62em; width: 6px; height: 6px; border-radius: 999px; background: var(--teal-300); }
.msg-time { font: 500 11px/1.5 var(--font-mono); color: var(--navy-300); justify-self: start; }
.chat-tag { justify-self: start; font: 500 11px/1.5 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--navy-300); padding: 4px 10px; border: 1px solid rgba(194,208,234,.25); border-radius: 999px; }

/* ---- Card + lưới ---- */
.grid { display: grid; gap: 16px; }
@media (min-width: 640px) { .g2, .g3, .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } .g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } .grid { gap: 20px; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 24px; box-shadow: var(--shadow-1); }
.card h3 + p, .card h4 + p { margin-top: 8px; }
.card p { color: var(--muted); }
.ic-box { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--navy-50); color: var(--navy-800); margin-bottom: 16px; }
.ic-box .ic { width: 22px; height: 22px; }
@media (max-width: 639px) { .card { padding: 20px; } }

.card-navy { background: var(--navy-900); border-color: rgba(194,208,234,.14); box-shadow: none; }
.card-navy p { color: var(--navy-200); }
.ic-box-navy { background: rgba(126,211,232,.1); color: var(--teal-300); }

/* Nỗi đau */
.pain .say { margin-top: 12px; padding: 12px 16px; border-radius: var(--r-bubble) var(--r-bubble) var(--r-bubble) 6px; background: var(--navy-50); color: var(--navy-900) !important; font-size: 15.5px; font-weight: 500; }

/* Bốn phần */
.part { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 14px; align-items: start; }
.part .ic-box { margin-bottom: 0; }
.part p { font-size: 15px; }

/* Ảnh thật / chỗ chờ ảnh */
.proof { display: grid; gap: 24px; align-items: center; }
@media (min-width: 900px) { .proof { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 48px; } }
.proof-list { display: grid; gap: 14px; margin-top: 20px; }
.proof-list li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 12px; color: var(--navy-100); font-size: 15.5px; }
.proof-list .ic { color: var(--teal-300); margin-top: 3px; }

/* ---- Gói ---- */
.plans { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; align-items: start; }
@media (min-width: 900px) { .plans { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; } }
.plan { display: flex; flex-direction: column; padding: 28px; }
@media (max-width: 359px) { .plan { padding: 22px 18px; } }
.plan-noibat { border: 2px solid var(--navy-800); }
.plan-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.plan-tag { font: 500 11px/1.5 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--navy-800); background: var(--navy-50); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.plan h3 { font-size: 22px; }
.plan .cho-ai { margin-top: 8px; color: var(--muted); }
.price { margin-top: 20px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.price .so { font: 700 clamp(30px, 4vw, 38px)/1.1 var(--font-sans); color: var(--navy-900); letter-spacing: -0.02em; }
.price .cach { font-size: 14px; color: var(--gray-500); }
.price + p { margin-top: 12px; }
.ket-qua { margin-top: 18px; padding: 14px 16px; border-radius: 14px; background: var(--navy-50); color: var(--navy-900); font-size: 15px; }
.ket-qua strong { display: block; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--navy-700); font-family: var(--font-mono); font-weight: 500; margin-bottom: 4px; }
.plan h4 { margin-top: 22px; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--gray-500); }
.plan ul { margin-top: 10px; display: grid; gap: 8px; }
.plan li { display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: 10px; font-size: 15px; color: var(--fg); }
.plan li .ic { width: 18px; height: 18px; margin-top: 3px; color: var(--teal-600); }
.plan .khong li { color: var(--muted); }
.plan .khong li .ic { color: var(--gray-500); }
.cam-ket { margin-top: 18px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; font-size: 14.5px; color: var(--navy-900); display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px; }
.cam-ket .ic { color: var(--teal-600); margin-top: 2px; }
.plan .cta-row { margin-top: auto; padding-top: 24px; }
.lam-rieng { margin-top: 28px; padding: 18px 20px; border: 1px dashed var(--navy-200); border-radius: 14px; color: var(--muted); font-size: 15px; display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between; }
.lam-rieng a { font-weight: 600; white-space: nowrap; }

/* ---- Bảng chi phí ---- */
.cost { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; font-size: 15px; }
.cost-wrap { overflow-x: auto; border-radius: 14px; }
.cost th, .cost td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.cost th { background: var(--navy-50); color: var(--navy-900); font-weight: 600; font-size: 13px; letter-spacing: .04em; text-transform: uppercase; }
.cost tr:last-child td { border-bottom: 0; }
.cost td:nth-child(2) { font-weight: 600; color: var(--navy-900); white-space: nowrap; }
.cost td:nth-child(3) { color: var(--muted); font-size: 14px; }
@media (max-width: 639px) { .cost td:nth-child(2) { white-space: normal; } .cost th, .cost td { padding: 12px; } }

/* ---- Bước ---- */
.steps { counter-reset: b; }
.step { display: flex; gap: 16px; align-items: flex-start; }
.step-n { flex: none; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 999px; background: var(--navy-800); color: #fff; font-size: 17px; }
.step h3 { font-size: 17px; }
.step p { margin-top: 6px; font-size: 15px; }
.step small { display: block; margin-top: 8px; font: 500 12px/1.5 var(--font-mono); color: var(--gray-500); }

/* ---- FAQ ---- */
.faq-in .sect-head, .faq { max-width: 760px; margin-inline: auto; }
.faq { display: grid; gap: 12px; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer;
  padding: 18px 20px; font-weight: 600; color: var(--heading); list-style: none; min-height: 56px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .ic { color: var(--navy-300); transition: transform 200ms var(--ease); }
.faq details[open] summary .ic { transform: rotate(45deg); }
.faq details p { padding: 0 20px 20px; color: var(--muted); }
.faq details p + p { margin-top: -8px; }

/* ---- CTA cuối + footer ---- */
.final-in { text-align: center; max-width: 760px; }
.final-in .lead { margin-inline: auto; }
.final-mascot { width: 112px; height: auto; margin: 0 auto 12px; }
.foot { background: var(--navy-950); color: var(--navy-300); padding-block: 28px 96px; font-size: 14px; }
@media (min-width: 900px) { .foot { padding-bottom: 28px; } }
.foot-in { display: grid; gap: 10px; }
.foot strong { color: #fff; }
.foot a { color: var(--teal-300); }
.foot .note { margin: 0; color: var(--navy-300); max-width: none; }

/* ---- Thanh CTA dính đáy (mobile) ---- */
.dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  padding: 12px var(--gutter) calc(12px + env(safe-area-inset-bottom));
  background: var(--navy-950); border-top: 1px solid rgba(194,208,234,.14);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease), visibility 0s;
}
.dock[data-show="0"] { transform: translateY(100%); opacity: 0; visibility: hidden; transition-delay: 0s, 0s, 200ms; }
@media (min-width: 900px) { .dock { display: none !important; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0ms !important; animation: none !important; }
}

/* ---- 404 ---- */
.page-404 { min-height: 100vh; display: grid; place-items: center; }
.page-404 h1 { color: #fff; font-size: clamp(28px, 5vw, 40px); }

/* Nav: mục đang xem + nav chân trang (thêm 08/10, 4 trang) */
.top-nav a[aria-current="page"] { color: #fff; background: rgba(255,255,255,.08); }
.foot-nav { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-bottom: 12px; }
.foot-nav a { color: var(--navy-200); text-decoration: none; font-size: 14px; font-weight: 500; }
.foot-nav a:hover { color: #fff; text-decoration: underline; }

/* Hero ngắn cho trang phụ (/viec /gia /kham-pha) */
.hero-ngan .wrap { max-width: 760px; }
.hero-ngan h1 { font-size: clamp(30px, 4.6vw, 44px); }
.hero-ngan .hero-sub { margin-top: 14px; }

/* /viec: nhóm × việc, kho kết nối, chú giải */
.nhom + .nhom { margin-top: 48px; }
.sect-head-trai { text-align: left; margin-bottom: 20px; }
.sect-head-trai h3 { font-size: clamp(20px, 2.6vw, 26px); font-weight: 800; color: var(--navy-900); letter-spacing: -0.01em; }
.viec-card h4 { font-size: 17px; font-weight: 700; color: var(--navy-900); }
.viec-ketnoi { margin-top: 10px; font-size: 13px; color: var(--navy-700); font-family: "IBM Plex Mono", ui-monospace, monospace; }
.goi-nhan { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--navy-900); text-decoration: none; border-bottom: 1px solid var(--teal-500); }
.goi-nhan:hover { color: var(--teal-700); }
.ketnoi { display: grid; gap: 20px; }
@media (min-width: 900px) { .ketnoi { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.ketnoi-nhom h3 { font-size: 15px; font-weight: 700; color: var(--navy-900); letter-spacing: .02em; margin-bottom: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.chip { display: inline-block; padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 500; border: 1px solid var(--line); background: #fff; color: var(--navy-900); }
.chip[data-goi="tu-lam"] { border-color: var(--teal-500); background: var(--teal-100); }
.chip[data-goi="cung-lam"] { border-color: var(--navy-700); }
.chip[data-goi="lam-rieng"] { border-style: dashed; border-color: var(--navy-300); color: var(--navy-700); }
.chu-giai { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 20px; padding: 0; list-style: none; font-size: 14px; color: var(--muted); }
.chu-giai li { display: flex; align-items: center; gap: 8px; }
```

/* /kham-pha: bảng hỏi + kết quả */
.quiz-in { max-width: 820px; }
.quiz-q { border: 1px solid var(--line); border-radius: var(--r-card); padding: 20px; margin: 0 0 16px; background: var(--card); }
.quiz-q legend, .quiz-ke > label { font-weight: 700; color: var(--navy-900); font-size: 17px; padding: 0 6px; display: block; }
.quiz-q legend .mono, .quiz-ke .mono { color: var(--teal-700); margin-right: 6px; }
.quiz-ke small { font-weight: 400; color: var(--muted); font-size: 14px; }
.quiz-opts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.quiz-opts label { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; font-size: 15px; background: #fff; }
.quiz-opts input { accent-color: var(--teal-700); }
.quiz-opts label:has(input:checked) { border-color: var(--navy-900); background: var(--navy-50); }
.quiz-q.is-missing { border-color: var(--teal-700); box-shadow: 0 0 0 3px var(--teal-100); }
.quiz textarea { width: 100%; margin-top: 12px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; font: inherit; font-size: 15px; resize: vertical; }
.quiz-err { color: var(--navy-900); font-weight: 600; margin: 4px 0 12px; }
.btn-ghost-sang { color: var(--navy-900); border-color: var(--line); }
.ket-qua-kp { margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--line); }
.ket-qua-kp h2 { font-size: clamp(24px, 3vw, 32px); margin: 8px 0 20px; }
.ket-qua-kp ol { padding: 0; list-style: none; counter-reset: viec; }
.ket-qua-kp .viec-card { position: relative; counter-increment: viec; }
.ket-qua-kp .viec-card::before { content: counter(viec); position: absolute; top: 16px; right: 16px; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 13px; color: var(--teal-700); }
.kq-buoc { margin-top: 20px; }
.kq-buoc h3 { font-size: 15px; letter-spacing: .02em; }
.kq-buoc h3 + p { margin-bottom: 14px; }

/* Nav trên mobile (thêm 08/10): 4 trang thì điện thoại cũng cần đường sang trang khác.
   Dưới 900px nav hiện bên phải logo, nút Zalo đã có ở dock. Dưới 480px chỉ giữ logo cho đủ chỗ. */
@media (max-width: 899px) {
  .top-nav { display: flex; gap: 0; }
  .top-nav a { white-space: nowrap; padding: 8px 9px; }
  .brand small { display: none; }
}
@media (max-width: 479px) {
  .brand span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .top-nav a { padding: 8px 7px; }
}
@media (max-width: 359px) { .top-nav a { font-size: 14px; padding: 8px 5px; } }