/* Mở Mic · website giới thiệu.
   Một điểm nhấn duy nhất: dòng phụ đề "karaoke" — câu nói ở 5 thứ tiếng được tô vàng sân khấu theo nhịp đọc.
   Còn lại yên tĩnh: nền giấy tím rất nhạt, chữ Be Vietnam Pro, căn trái, ảnh thật của sản phẩm. */
@font-face { font-family: "BVP"; font-style: normal; font-weight: 400; font-display: swap; src: url(/fonts/bvp-vietnamese-400.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: "BVP"; font-style: normal; font-weight: 400; font-display: swap; src: url(/fonts/bvp-latin-400.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: "BVP"; font-style: normal; font-weight: 400; font-display: swap; src: url(/fonts/bvp-latin-ext-400.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-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "BVP"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/bvp-vietnamese-600.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: "BVP"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/bvp-latin-600.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: "BVP"; font-style: normal; font-weight: 600; font-display: swap; src: url(/fonts/bvp-latin-ext-600.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-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "BVP"; font-style: normal; font-weight: 800; font-display: swap; src: url(/fonts/bvp-vietnamese-800.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: "BVP"; font-style: normal; font-weight: 800; font-display: swap; src: url(/fonts/bvp-latin-800.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: "BVP"; font-style: normal; font-weight: 800; font-display: swap; src: url(/fonts/bvp-latin-ext-800.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-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }

:root {
  --night: #1b0b3f;
  --night-2: #2a1366;
  --violet: #6b2ee0;
  --violet-ink: #4f1fb3;
  --lilac: #b79bff;
  --mist: #efe7ff;
  --paper: #fbf9ff;
  --white: #fff;
  --ink: #1a0f33;
  --ink-2: #554a70;
  --line: #e4daf7;
  --stage: #ffc23d;
  --live: #22c55e;
  --font: "BVP", "Be Vietnam Pro", "Segoe UI", system-ui, -apple-system, sans-serif;
  --cjk: "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", "Malgun Gothic", "Microsoft YaHei", sans-serif;
  --wrap: 1160px;
  --r: 14px;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--paper); font-size: 17px; line-height: 1.65; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--violet-ink); text-underline-offset: 3px; }
a:hover { color: var(--violet); }
:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3, h4 { margin: 0; line-height: 1.12; letter-spacing: -0.02em; text-wrap: balance; }
h1 { font-size: clamp(38px, 5.6vw, 72px); font-weight: 800; }
h2 { font-size: clamp(28px, 3.6vw, 44px); font-weight: 800; }
h3 { font-size: 21px; font-weight: 800; letter-spacing: -0.01em; }
p { margin: 0; }
.cjk { font-family: var(--cjk); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 max(20px, env(safe-area-inset-left, 0px)); }
.narrow { max-width: 760px; }
.lead { font-size: clamp(18px, 1.7vw, 20px); color: var(--ink-2); max-width: 60ch; }
.muted { color: var(--ink-2); }
.small { font-size: 14px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--white); padding: 8px 14px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 12px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* nút */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 24px; border-radius: 999px; font: inherit; font-weight: 800; font-size: 16px; text-decoration: none; border: 2px solid transparent; cursor: pointer; transition: background 0.15s, color 0.15s, border-color 0.15s; }
.btn-stage { background: var(--stage); color: var(--ink); }
.btn-stage:hover { background: #ffcf63; color: var(--ink); }
.btn-violet { background: var(--violet); color: var(--white); }
.btn-violet:hover { background: var(--violet-ink); color: var(--white); }
.btn-line { border-color: currentColor; color: inherit; background: transparent; }
.btn-line:hover { color: inherit; background: rgba(127, 111, 174, 0.12); }
.btn .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--live); box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.25); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* đầu trang */
.top { position: sticky; top: 0; z-index: 30; background: rgba(251, 249, 255, 0.94); backdrop-filter: saturate(140%) blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 68px; }
.logo { display: inline-flex; align-items: center; flex: none; }
.logo img { height: 38px; width: auto; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a { padding: 8px 12px; border-radius: 10px; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px; }
.nav a:hover, .nav a[aria-current="page"] { background: var(--mist); color: var(--violet-ink); }
.top .btn { min-height: 44px; padding: 0 18px; font-size: 15px; }
.menu-btn { display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line); background: var(--white); font: inherit; font-size: 20px; cursor: pointer; }
@media (max-width: 960px) {
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px; font-size: 17px; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; }
  .top .btn-cta { display: none; }
  .nav .btn-cta-m { display: flex; margin-top: 8px; }
}
.nav .btn-cta-m { display: none; }

/* sân khấu (hero) */
.stage { background: var(--night); color: var(--white); position: relative; overflow: hidden; }
.stage a:not(.btn) { color: var(--lilac); }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: clamp(28px, 4vw, 56px); align-items: center; padding-top: clamp(40px, 6vw, 84px); padding-bottom: clamp(44px, 6vw, 80px); }
.hero h1 { color: var(--white); }
.hero .lead { color: #d9cdf7; margin-top: 18px; }
.hero .actions { margin-top: 30px; }
.hero .btn-line { color: var(--white); }
.hero-note { margin-top: 18px; font-size: 14px; color: #bfaee9; }
@media (max-width: 900px) { .hero { grid-template-columns: minmax(0, 1fr); } }

/* khung video + phụ đề karaoke (điểm nhấn) */
.screen { position: relative; border-radius: 18px; overflow: hidden; background: #0f0726; box-shadow: 0 30px 80px rgba(8, 2, 28, 0.55); aspect-ratio: 16 / 9; }
.screen video, .screen img { width: 100%; height: 100%; object-fit: cover; }
.karaoke { margin-top: 18px; min-height: 104px; }
.k-line { font-size: clamp(22px, 2.6vw, 32px); font-weight: 800; line-height: 1.25; letter-spacing: -0.01em; color: rgba(255, 255, 255, 0.28); background: linear-gradient(90deg, var(--stage) 0 var(--p, 0%), rgba(255, 255, 255, 0.28) var(--p, 0%) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.k-sub { margin-top: 6px; font-size: 15px; color: #cbbcf3; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.k-lang { flex: none; font-size: 12px; font-weight: 800; padding: 2px 8px; border-radius: 999px; background: rgba(183, 155, 255, 0.18); color: var(--lilac); }
@media (prefers-reduced-motion: reduce) { .k-line { -webkit-text-fill-color: var(--stage); color: var(--stage); background: none; } }

/* khối nội dung */
.band { padding: clamp(56px, 8vw, 104px) 0; }
.band.white { background: var(--white); }
.band.mist { background: var(--mist); }
.band.night { background: var(--night); color: var(--white); }
.band.night .lead, .band.night .muted { color: #cbbcf3; }
.band-head { max-width: 720px; margin-bottom: clamp(28px, 4vw, 48px); }
.band-head .lead { margin-top: 14px; }

/* các bước (là một trình tự thật) */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; counter-reset: s; }
.steps li { counter-increment: s; border-top: 3px solid var(--violet); padding-top: 18px; }
.steps li::before { content: counter(s); display: block; font-size: 44px; font-weight: 800; color: var(--violet); line-height: 1; margin-bottom: 12px; }
.steps h3 { margin-bottom: 8px; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* tính năng: ảnh + chữ xen kẽ */
.feature { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
.feature + .feature { margin-top: clamp(56px, 8vw, 96px); }
.feature.flip > figure { order: 2; }
.feature figure { margin: 0; }
.feature figure img { border-radius: var(--r); box-shadow: 0 18px 50px rgba(42, 19, 102, 0.16); }
.feature figcaption { font-size: 14px; color: var(--ink-2); margin-top: 10px; }
.feature h3 { font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 14px; }
.feature ul { margin: 16px 0 0; padding-left: 20px; }
.feature li { margin: 6px 0; }
@media (max-width: 860px) { .feature { grid-template-columns: minmax(0, 1fr); } .feature.flip > figure { order: 0; } }

/* danh sách lộ trình: dòng chữ lớn, không thẻ */
.programs { border-top: 1px solid var(--line); }
.prog { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; gap: 18px; align-items: center; padding: 20px 4px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.prog:hover { background: var(--mist); color: var(--ink); }
.prog .ic { font-size: 34px; line-height: 1; text-align: center; }
.prog b { font-size: clamp(19px, 2vw, 23px); font-weight: 800; letter-spacing: -0.01em; display: block; }
.prog small { display: block; color: var(--ink-2); font-size: 15px; margin-top: 2px; }
.prog .lvl { font-weight: 800; color: var(--violet-ink); white-space: nowrap; font-size: 15px; }
@media (max-width: 600px) { .prog { grid-template-columns: 40px minmax(0, 1fr); } .prog .lvl { grid-column: 2; white-space: normal; } .prog .ic { font-size: 28px; } }

/* bảng giờ bay (Khu Thế Giới) */
.board { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.board th { text-align: left; font-size: 13px; font-weight: 600; color: #b8a6ea; padding: 0 12px 10px 0; border-bottom: 1px solid rgba(183, 155, 255, 0.35); }
.board td { padding: 13px 12px 13px 0; border-bottom: 1px solid rgba(183, 155, 255, 0.16); vertical-align: middle; }
.board td.fl { width: 46px; }
.board td.fl img { width: 34px; height: 25px; border-radius: 4px; object-fit: cover; }
.board td b { font-weight: 800; }
.board td .nat { color: #cbbcf3; margin-left: 8px; }
.board td.st { color: var(--stage); font-weight: 600; white-space: nowrap; }
@media (max-width: 640px) { .board .hide-m { display: none; } .board td.st { white-space: normal; } .board td .nat { display: block; margin-left: 0; font-size: 14px; } }

/* ô thông tin đôi */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); }
@media (max-width: 800px) { .split { grid-template-columns: minmax(0, 1fr); } }
.pane { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: clamp(22px, 3vw, 34px); }
.pane h3 { margin-bottom: 10px; }
.pane ul { margin: 12px 0 0; padding-left: 20px; }
.pane li { margin: 6px 0; }
.pane .actions { margin-top: 20px; }
.ticks { list-style: none; padding: 0 !important; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 0.55em; width: 12px; height: 7px; border-left: 3px solid var(--violet); border-bottom: 3px solid var(--violet); transform: rotate(-45deg); }

/* hỏi đáp */
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; list-style: none; font-weight: 800; font-size: 18px; padding: 16px 40px 16px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 12px; font-size: 26px; font-weight: 400; color: var(--violet); }
.faq details[open] summary::after { content: "–"; }
.faq details > div { padding: 0 0 18px; color: var(--ink-2); max-width: 70ch; }
.faq details > div p + p { margin-top: 10px; }

/* đăng ký */
.signup { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 860px) { .signup { grid-template-columns: minmax(0, 1fr); } }
form.lead-form { background: var(--white); color: var(--ink); border-radius: 18px; padding: clamp(20px, 3vw, 32px); display: grid; gap: 14px; border: 1px solid var(--line); }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 15px; }
.field input, .field select, .field textarea { font: inherit; font-size: 16px; padding: 12px 14px; border-radius: 12px; border: 1.5px solid #cfc2ec; background: var(--white); color: var(--ink); width: 100%; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px rgba(107, 46, 224, 0.18); }
.row2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
@media (max-width: 520px) { .row2 { grid-template-columns: minmax(0, 1fr); } }
.hp { position: absolute; left: -9999px; }
.form-msg { font-weight: 600; min-height: 1.4em; }
.form-msg.ok { color: #08714c; }
.form-msg.err { color: #b42318; }
.consent { font-size: 13px; color: var(--ink-2); }

/* trang con: đầu trang */
.page-head { padding: clamp(40px, 6vw, 72px) 0 clamp(28px, 4vw, 44px); }
.page-head h1 { font-size: clamp(34px, 4.8vw, 58px); max-width: 18ch; }
.page-head .lead { margin-top: 16px; }
.page-head .actions { margin-top: 26px; }
.crumbs { font-size: 14px; color: var(--ink-2); margin-bottom: 18px; }
.crumbs a { color: var(--ink-2); }
.crumbs span[aria-current] { color: var(--ink); }

/* bài viết */
.post-head { padding: clamp(36px, 5vw, 64px) 0 24px; }
.post-head h1 { font-size: clamp(32px, 4.4vw, 52px); max-width: 22ch; }
.post-meta { margin-top: 16px; color: var(--ink-2); font-size: 15px; }
.post-cover { margin: 8px 0 0; }
.post-cover img { border-radius: var(--r); width: 100%; }
.post-grid { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; align-items: start; padding-bottom: 72px; }
@media (max-width: 1000px) { .post-grid { grid-template-columns: minmax(0, 1fr); } .toc { display: none; } }
.prose { max-width: 70ch; font-size: 18px; line-height: 1.75; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: clamp(25px, 2.6vw, 31px); margin-top: 1.9em; }
.prose h3 { font-size: 21px; margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.4em; }
.prose blockquote { margin-left: 0; padding: 14px 20px; border-left: 4px solid var(--violet); background: var(--mist); border-radius: 0 12px 12px 0; }
.prose .tbl { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.prose table { width: 100%; border-collapse: collapse; font-size: 16px; }
.prose .cjk { font-size: 1.06em; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--mist); font-weight: 800; }
.prose code { font-size: 0.92em; background: var(--mist); padding: 1px 6px; border-radius: 6px; }
.prose img { border-radius: 12px; }
.prose .src { font-size: 15px; color: var(--ink-2); }
.prose .src a { color: var(--ink-2); }
.toc { position: sticky; top: 92px; font-size: 15px; border-left: 2px solid var(--line); padding-left: 18px; }
.toc b { display: block; margin-bottom: 8px; }
.toc ol { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 7px 0; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--violet-ink); }
.post-cta { margin-top: 48px; padding: 28px; border-radius: 18px; background: var(--night); color: var(--white); }
.post-cta p { color: #d9cdf7; margin: 8px 0 18px; }

/* danh sách bài */
.posts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px 28px; }
@media (max-width: 960px) { .posts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .posts { grid-template-columns: minmax(0, 1fr); } }
.post-item { text-decoration: none; color: var(--ink); display: block; }
.post-item img { border-radius: 12px; aspect-ratio: 1200 / 630; object-fit: cover; width: 100%; background: var(--mist); }
.post-item h3 { margin-top: 14px; font-size: 20px; line-height: 1.3; }
.post-item p { margin-top: 8px; color: var(--ink-2); font-size: 15.5px; }
.post-item .tag { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--violet-ink); }
.post-item:hover h3 { color: var(--violet-ink); }

/* video ngắn */
.shorts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
@media (max-width: 860px) { .shorts { grid-template-columns: repeat(3, minmax(220px, 1fr)); overflow-x: auto; padding-bottom: 8px; scroll-snap-type: x mandatory; } .shorts figure { scroll-snap-align: start; } }
.shorts figure { margin: 0; }
.shorts video { border-radius: 16px; aspect-ratio: 9 / 16; object-fit: cover; background: #0f0726; width: 100%; }
.shorts figcaption { margin-top: 10px; font-weight: 600; }

/* chân trang */
.foot { background: var(--white); border-top: 1px solid var(--line); padding: 56px 0 36px; font-size: 15px; }
.foot-grid { display: grid; grid-template-columns: 1.3fr repeat(3, minmax(0, 1fr)); gap: 32px; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .foot-grid { grid-template-columns: minmax(0, 1fr); } }
.foot h4 { font-size: 15px; margin-bottom: 12px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin: 7px 0; }
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--violet-ink); }
.foot .owner { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; gap: 22px; align-items: center; flex-wrap: wrap; color: #4a4a4a; }
.foot .owner img { height: 54px; width: auto; }
.foot .owner p { font-size: 13.5px; line-height: 1.55; max-width: 80ch; }
.foot .owner b { color: #111; }

/* thanh mời học cố định trên điện thoại */
.dock { display: none; }
@media (max-width: 700px) {
  .dock { display: flex; position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom, 0px)); z-index: 25; }
  .dock .btn { flex: 1; box-shadow: 0 12px 30px rgba(27, 11, 63, 0.35); }
  body.has-dock { padding-bottom: 84px; }
}

/* blog: đoạn mở bài, bài nổi bật, chủ đề, nút viền trên nền tối */
.prose .lead-in { font-size: 20px; color: var(--ink-2); line-height: 1.6; }
.btn-on-dark { color: var(--white); }
.btn-on-dark:hover { color: var(--white); background: rgba(255, 255, 255, 0.1); }
.post-cta h3 { color: var(--white); font-size: 24px; }
.post-cta .actions { margin-top: 4px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.tags span { font-size: 14px; font-weight: 600; padding: 5px 12px; border-radius: 999px; background: var(--mist); color: var(--violet-ink); }
.post-lead { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 52px); align-items: center; text-decoration: none; color: var(--ink); }
.post-lead img { border-radius: var(--r); aspect-ratio: 1200 / 630; object-fit: cover; width: 100%; background: var(--mist); }
.post-lead h2 { font-size: clamp(26px, 3vw, 38px); margin-top: 10px; }
.post-lead p { margin-top: 14px; color: var(--ink-2); font-size: 17px; }
.post-lead .tag { font-size: 14px; font-weight: 600; color: var(--violet-ink); }
.post-lead:hover h2 { color: var(--violet-ink); }
@media (max-width: 860px) { .post-lead { grid-template-columns: minmax(0, 1fr); } }
.prose h2[id], .prose h3[id] { scroll-margin-top: 92px; }

/* chuyển ngôn ngữ trang (Tiếng Việt ↔ English) */
.lang-sw { flex: none; display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 600; font-size: 14px; background: var(--white); }
.lang-sw:hover { color: var(--violet-ink); background: var(--mist); }
@media (max-width: 960px) {
  .lang-sw { margin-left: auto; }
  .menu-btn { margin-left: 8px; }
}