/* ═══════════════════════════════════════════════════════════════════════════
   public/assets/css/learn-help.css — "Hướng dẫn sử dụng" /huong-dan-su-dung (Đợt 1, 27/09/2026).
   Trang chính (ô tìm + nhóm) · trang nhóm · trang bài (bước đánh số + ảnh chụp khoanh số + chú giải).
   Dựng trên token --lv-* (learn-shell.css) + khung .lv-band/.lv-card/.lv-btn (learn-ui.css). KHÔNG hex cứng — tự lật ở
   chế độ tối. Không icon trang trí, không nhãn nhỏ viết hoa (gu chủ site). Ảnh chụp luôn là giao diện sáng — cố ý.
   ═══════════════════════════════════════════════════════════════════════════ */
.hc-vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ═══ Dải đầu trang ═══ */
.hc-band { --lv-band-pb: 104px; }
.hc-band--hub { --lv-band-pb: 118px; }
.hc-band--art { --lv-band-pb: 96px; }
.hc-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: center; gap: 36px; }
.hc-title { font-size: 44px; line-height: 1.08; font-weight: 800; letter-spacing: -.035em; color: var(--lv-on); text-wrap: balance; }
.hc-title span { color: var(--lv-mint); }
.hc-title--sub { font-size: 38px; }
.hc-title--art { font-size: 36px; line-height: 1.15; max-width: 30ch; }
.hc-lead { margin-top: 12px; max-width: 64ch; font-size: 16px; line-height: 1.6; color: var(--lv-on-2); }
.hc-crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; margin-bottom: 14px; font-size: 14px; color: var(--lv-on-3); }
.hc-crumb a { color: var(--lv-on-2); font-weight: 600; }
.hc-crumb a:hover { color: var(--lv-on); text-decoration: underline; text-underline-offset: 3px; }
.hc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

/* Ô tìm — icon kính lúp nằm TRONG ô là chỗ bấm để tìm, không phải trang trí */
.hc-search { position: relative; max-width: 660px; margin-top: 24px; }
.hc-search input {
  width: 100%; height: 58px; padding: 0 18px 0 52px; border: 1px solid transparent; border-radius: 16px;
  background: var(--lv-surface); color: var(--lv-ink); font: 500 16px/1.4 var(--lv-font); -webkit-appearance: none; appearance: none;
  box-shadow: 0 20px 44px -22px color-mix(in srgb, black 60%, transparent);
}
.hc-search input::placeholder { color: var(--lv-muted); }
.hc-search input:focus { outline: none; box-shadow: var(--lv-focus), 0 20px 44px -22px color-mix(in srgb, black 60%, transparent); }
.hc-search input::-webkit-search-cancel-button { cursor: pointer; }
.hc-search__ic { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); fill: none; stroke: var(--lv-muted); stroke-width: 2; stroke-linecap: round; pointer-events: none; }

/* Thẻ kính "Mới dùng NAVS?" */
.hc-start { display: grid; gap: 6px; padding: 20px 22px 22px; }
.hc-start > b { font-size: 17px; line-height: 1.35; font-weight: 750; color: var(--lv-on); }
.hc-start > p { font-size: 14px; line-height: 1.55; color: var(--lv-on-2); }
.hc-start ol { margin: 8px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; counter-reset: hcs; }
.hc-start li { counter-increment: hcs; }
.hc-start a {
  display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 9px 14px 9px 10px; border-radius: 13px;
  background: var(--lv-glass); border: 1px solid var(--lv-line-d); color: var(--lv-on); font-size: 14.5px; font-weight: 600; line-height: 1.35;
  transition: background var(--lv-dur) var(--lv-ease);
}
.hc-start a::before {
  content: counter(hcs); flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--lv-on); color: var(--lv-deep-ink); font-size: 13px; font-weight: 800;
}
.hc-start a:hover { background: var(--lv-glass-2); }

/* ═══ Thân trang (chồng lên dải) ═══ */
.hc-body { position: relative; margin-top: -78px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
.hc-body > * { min-width: 0; }

/* Câu hỏi hay gặp */
.hc-pop, .hc-results { display: grid; gap: 14px; padding: 20px 22px 22px; }
.hc-pop h2, .hc-results h2 { font-size: 17px; line-height: 1.35; font-weight: 750; letter-spacing: -.01em; color: var(--lv-ink); }
.hc-pop__list { display: flex; flex-wrap: wrap; gap: 8px; }
.hc-pill {
  display: inline-flex; align-items: center; min-height: 40px; padding: 8px 15px; border-radius: 12px;
  background: var(--lv-wash); color: var(--lv-brand-deep); font-size: 14px; font-weight: 600; line-height: 1.4;
  transition: background var(--lv-dur) var(--lv-ease);
}
.hc-pill:hover { background: color-mix(in srgb, var(--color-primary) 18%, var(--lv-surface)); }
.hc-results[hidden], .hc-groups[hidden], .hc-pop[hidden] { display: none !important; }

/* Kết quả tìm */
.hc-results__list { display: grid; }
.hc-res { display: grid; gap: 4px; padding: 14px 0; border-top: 1px solid var(--lv-hair); }
.hc-res:first-child { border-top: 0; padding-top: 4px; }
.hc-res b { font-size: 16px; line-height: 1.4; color: var(--lv-ink); }
.hc-res span { font-size: 14px; line-height: 1.55; color: var(--lv-text); }
.hc-res small { font-size: 13px; font-weight: 600; color: var(--lv-brand-fg); }
.hc-res:hover b, .hc-res:focus-visible b { color: var(--lv-brand-deep); }
.hc-res:focus-visible { outline: none; box-shadow: var(--lv-focus); border-radius: 10px; }
.hc-empty { font-size: 14.5px; line-height: 1.6; color: var(--lv-muted); }

/* Các nhóm */
.hc-groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.hc-group { display: flex; flex-direction: column; overflow: hidden; }
.hc-group__cover { display: block; height: 150px; overflow: hidden; background: var(--lv-sunken); border-bottom: 1px solid var(--lv-hair); }
.hc-group__cover img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: left top; }
.hc-group__b { display: grid; gap: 8px; align-content: start; padding: 18px 20px 20px; }
.hc-group__b h2 { font-size: 18px; line-height: 1.35; font-weight: 750; letter-spacing: -.01em; color: var(--lv-ink); }
.hc-group__b h2 a:hover { color: var(--lv-brand-deep); }
.hc-group__b > p { font-size: 13.5px; line-height: 1.55; color: var(--lv-muted); }
.hc-group__list { margin: 6px 0 0; padding: 0; list-style: none; display: grid; }
.hc-group__list a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0;
  border-top: 1px solid var(--lv-hair); font-size: 14.5px; line-height: 1.4; font-weight: 600; color: var(--lv-ink);
}
.hc-group__list a::after { content: "›"; flex: none; font-size: 19px; line-height: 1; color: var(--lv-faint); }
.hc-group__list a:hover { color: var(--lv-brand-deep); }
.hc-group__all { justify-self: start; margin-top: 2px; font-size: 13.5px; font-weight: 650; color: var(--lv-brand-fg); }
.hc-group__all:hover { color: var(--lv-brand-deep); }

/* ═══ Trang nhóm ═══ */
.hc-cols { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 20px; align-items: start; }
.hc-alist { padding: 6px 0; }
.hc-arow { display: grid; grid-template-columns: 34px minmax(0, 1fr) 176px; align-items: center; gap: 16px; padding: 18px 22px; border-top: 1px solid var(--lv-hair); }
.hc-arow:first-child { border-top: 0; }
.hc-arow__n {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--lv-wash); color: var(--lv-brand-deep);
  font-size: 14px; font-weight: 800; transition: background var(--lv-dur) var(--lv-ease), color var(--lv-dur) var(--lv-ease);
}
.hc-arow__t { display: grid; gap: 5px; min-width: 0; }
.hc-arow__t b { font-size: 16.5px; line-height: 1.35; font-weight: 750; color: var(--lv-ink); }
.hc-arow__t span { font-size: 14px; line-height: 1.55; color: var(--lv-text); }
.hc-arow__t small { font-size: 13px; color: var(--lv-muted); }
.hc-arow__img { display: block; height: 104px; overflow: hidden; border-radius: 12px; border: 1px solid var(--lv-hair); background: var(--lv-sunken); }
.hc-arow__img img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: left top; }
.hc-arow:hover b { color: var(--lv-brand-deep); }
.hc-arow:hover .hc-arow__n { background: var(--lv-brand-strong); color: var(--lv-on); }
.hc-side { display: grid; gap: 16px; position: sticky; top: calc(var(--lv-top-h, 64px) + 16px); }
.hc-gnav { display: grid; gap: 2px; padding: 16px 12px; }
.hc-gnav > b { padding: 0 10px 8px; font-size: 14px; line-height: 1.4; font-weight: 700; color: var(--lv-ink); }
.hc-gnav a { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 9px 10px; border-radius: 10px; font-size: 14px; line-height: 1.4; color: var(--lv-text); }
.hc-gnav a:hover { background: var(--lv-tint); color: var(--lv-ink); }
.hc-gnav a.is-on { background: var(--lv-wash); color: var(--lv-brand-deep); font-weight: 650; }
.hc-gnav small { font-size: 12.5px; color: var(--lv-muted); }

/* ═══ Trang bài ═══ */
.hc--article .hc-body { container-type: inline-size; }
.hc-art { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; align-items: start; }
.hc-aside { display: grid; gap: 14px; align-content: start; }
@container (min-width: 1040px) {
  .hc-art { grid-template-columns: minmax(0, 1fr) 276px; }
  .hc-aside { position: sticky; top: calc(var(--lv-top-h, 64px) + 16px); }
  .hc-toc--top { display: none !important; }
}
@container (max-width: 1039.98px) {
  .hc-toc--side, .hc-aside > .lv-btn { display: none !important; }
}
.hc-doc { min-width: 0; padding: 30px 34px 32px; }

/* Mục lục */
.hc-toc { display: grid; gap: 10px; }
.hc-toc > b { font-size: 14.5px; line-height: 1.4; font-weight: 700; color: var(--lv-ink); }
.hc-toc--top { margin-bottom: 28px; padding: 16px 18px 18px; border-radius: 16px; background: var(--lv-sunken); }
.hc-toc--side { padding: 18px 14px 16px; }
.hc-toc--side > b { padding: 0 8px; }
.hc-toc__list { margin: 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.hc-toc__list a { display: flex; align-items: flex-start; gap: 10px; padding: 7px 8px; border-radius: 10px; font-size: 14px; line-height: 1.45; color: var(--lv-text); }
.hc-toc__list a .num {
  flex: none; min-width: 22px; height: 22px; margin-top: -1px; border-radius: 50%; display: grid; place-items: center;
  background: var(--lv-surface); border: 1px solid var(--lv-hair); color: var(--lv-brand-deep); font-size: 11.5px; font-weight: 800;
}
.hc-toc--side .hc-toc__list a .num { background: var(--lv-wash); border-color: transparent; }
.hc-toc__list a:hover { background: var(--lv-tint); color: var(--lv-ink); }
.hc-toc__list a.is-on { background: var(--lv-wash); color: var(--lv-brand-deep); font-weight: 650; }
.hc-toc__list a.is-on .num { background: var(--lv-brand-strong); border-color: transparent; color: var(--lv-on); }
.hc-toc__cta { justify-self: start; margin-top: 6px; }

/* Thân bài */
.hc-prose { font-size: 16px; line-height: 1.7; color: var(--lv-text); }
.hc-prose > * + * { margin-top: 16px; }
.hc-prose p, .hc-prose .hc-list, .hc-prose .hc-quote { max-width: 72ch; }
.hc-prose strong { font-weight: 650; color: var(--lv-ink); }
.hc-prose a:not(.lv-btn):not(.hc-see__it):not(.hc-shot__img) {
  color: var(--lv-brand-fg); font-weight: 600; text-decoration: underline; text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
}
.hc-prose a:not(.lv-btn):not(.hc-see__it):not(.hc-shot__img):hover { color: var(--lv-brand-deep); }
.hc-h2 { margin-top: 40px !important; font-size: 23px; line-height: 1.3; font-weight: 800; letter-spacing: -.02em; color: var(--lv-ink); scroll-margin-top: 96px; }
.hc-prose > .hc-h2:first-child { margin-top: 0 !important; }
.hc-list { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
.hc-list li { padding-left: 2px; }
.hc-list li::marker { color: var(--lv-brand-fg); font-weight: 700; }
/* `nhãn` = chữ đúng như trên màn hình (nút, mục menu) — viền nhẹ như một phím, cùng phông chữ thường */
.hc-ui {
  display: inline; padding: 1px 7px; border-radius: 7px; border: 1px solid var(--lv-border); background: var(--lv-surface);
  color: var(--lv-ink); font-size: .93em; font-weight: 650; line-height: 1.8; box-shadow: 0 1px 0 var(--lv-hair);
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}
.hc-quote { margin: 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--lv-border); color: var(--lv-muted); }
/* #### — tiêu đề nhỏ KHÔNG số (phần giải thích, "Trên điện thoại"…) */
.hc-h3 { margin-top: 28px !important; font-size: 18px; line-height: 1.4; font-weight: 750; color: var(--lv-ink); text-wrap: balance; }
/* ??? — câu hỏi khách hay hỏi + trả lời */
.hc-qa { display: grid; gap: 6px; padding-top: 16px; border-top: 1px solid var(--lv-hair); scroll-margin-top: 96px; }
.hc-h2 + .hc-qa { padding-top: 2px; border-top: 0; }
.hc-qa__q { font-size: 17px; line-height: 1.45; font-weight: 700; color: var(--lv-ink); text-wrap: balance; }
.hc-qa__a { display: grid; gap: 10px; }
.hc-qa__a > * { margin: 0; max-width: 72ch; }

/* Bước */
.hc-step { display: grid; gap: 14px; margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--lv-hair); scroll-margin-top: 96px; }
.hc-prose > .hc-step:first-child, .hc-h2 + .hc-step { margin-top: 18px; padding-top: 0; border-top: 0; }
.hc-prose > .hc-step:first-child { margin-top: 0; }
.hc-step__h { display: flex; align-items: center; gap: 14px; }
.hc-step__n {
  flex: none; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--lv-brand-strong); color: var(--lv-on); font-size: 16px; font-weight: 800;
  box-shadow: 0 6px 14px -8px color-mix(in srgb, var(--color-primary-hover) 90%, transparent);
}
.hc-step__h h3 { font-size: 19.5px; line-height: 1.35; font-weight: 750; letter-spacing: -.01em; color: var(--lv-ink); text-wrap: balance; }
.hc-step__b { display: grid; gap: 14px; padding-left: 50px; min-width: 0; }
.hc-step__b > * { min-width: 0; }
.hc-step__b > :is(.hc-shot, .hc-table, .hc-see) { margin-left: -50px; }

/* Ảnh chụp + chú giải số */
.hc-shot { display: grid; gap: 14px; margin: 4px 0 0; }
/* --w = bề rộng thật lúc chụp (help_figure) ⇒ ảnh hẹp (thanh bên, một thẻ) giữ đúng cỡ, ảnh rộng co theo cột */
.hc-shot__img {
  display: block; justify-self: center; width: min(100%, var(--w, 100%)); overflow: hidden; border-radius: 14px;
  border: 1px solid var(--lv-border); background: var(--lv-sunken); box-shadow: var(--lv-sh-2); cursor: zoom-in;
}
.hc-shot__img img { display: block; width: 100%; height: auto; }
.hc-shot--m .hc-shot__img { width: min(100%, var(--w, 360px), 360px); border-radius: 24px; }
@media (max-width: 640px) { .hc-shot--both .hc-shot__img { width: 100%; } }
.hc-shot__none { padding: 36px 16px; border-radius: 14px; border: 1px dashed var(--lv-border); text-align: center; font-size: 14px; color: var(--lv-muted); }
.hc-legend { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.hc-legend li { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 11px; align-items: start; font-size: 15px; line-height: 1.6; max-width: 76ch; }
.hc-legend__n {   /* ô vuông viền (như số khoanh trên ảnh) — khác vòng tròn đặc của số BƯỚC */
  width: 26px; height: 26px; margin-top: 1px; border-radius: 7px; display: grid; place-items: center;
  background: var(--lv-surface); color: var(--lv-brand-deep); border: 2px solid var(--lv-brand-strong); font-size: 13px; font-weight: 800;
}

/* Khung Mẹo / Lưu ý / Quan trọng */
.hc-call { display: grid; gap: 4px; max-width: 78ch; padding: 14px 18px 15px; border-radius: 14px; border: 1px solid transparent; }
.hc-call__l { font-size: 14px; line-height: 1.4; font-weight: 750; }
.hc-call p, .hc-call .hc-list { margin: 0; font-size: 15px; line-height: 1.65; }
.hc-call > * + * { margin-top: 4px; }
.hc-call--tip { background: var(--lv-wash); border-color: color-mix(in srgb, var(--color-primary) 20%, transparent); }
.hc-call--tip .hc-call__l { color: var(--lv-brand-deep); }
.hc-call--note { background: var(--lv-sunken); border-color: var(--lv-hair); }
.hc-call--note .hc-call__l { color: var(--lv-ink); }
.hc-call--warn { background: var(--color-warning-soft); border-color: color-mix(in srgb, var(--color-warning) 28%, transparent); }
.hc-call--warn .hc-call__l { color: var(--lv-warn-deep); }

/* Nút · thẻ dẫn bài · bảng */
.hc-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hc-see { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
.hc-see__it {
  display: grid; gap: 4px; align-content: start; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--lv-hair);
  background: var(--lv-surface); transition: border-color var(--lv-dur) var(--lv-ease);
}
.hc-see__it b { font-size: 15px; line-height: 1.4; color: var(--lv-ink); }
.hc-see__it span { font-size: 13.5px; line-height: 1.5; color: var(--lv-muted); }
.hc-see__it:hover { border-color: color-mix(in srgb, var(--color-primary) 40%, var(--lv-hair)); }
.hc-see__it:hover b { color: var(--lv-brand-deep); }
.hc-see__it.is-missing { border-style: dashed; }
.hc-table { overflow-x: auto; border: 1px solid var(--lv-hair); border-radius: 14px; }
.hc-table table { width: 100%; border-collapse: collapse; font-size: 14.5px; line-height: 1.55; }
.hc-table th, .hc-table td { padding: 10px 14px; text-align: left; vertical-align: top; border-top: 1px solid var(--lv-hair); }
.hc-table thead th { border-top: 0; background: var(--lv-sunken); font-size: 13.5px; font-weight: 700; color: var(--lv-ink); }

/* "Bài hướng dẫn này có giúp bạn?" */
.hc-vote { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--lv-hair); }
.hc-vote__ask { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px; }
.hc-vote__ask > b, .hc-vote__more > b { font-size: 16px; line-height: 1.4; font-weight: 700; color: var(--lv-ink); }
.hc-vote__btns { display: flex; gap: 8px; }
.hc-vote__btns .lv-btn { min-width: 96px; justify-content: center; }
.hc-vote__more { display: grid; gap: 12px; }
.hc-vote__more[hidden], .hc-vote__ask[hidden], .hc-vote__done[hidden] { display: none; }
.hc-vote__reasons { display: flex; flex-wrap: wrap; gap: 8px; }
.hc-vote__r { position: relative; display: inline-flex; cursor: pointer; }
.hc-vote__r input { position: absolute; opacity: 0; pointer-events: none; }
.hc-vote__r span {
  display: inline-flex; align-items: center; min-height: 36px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--lv-border);
  background: var(--lv-surface); font-size: 14px; line-height: 1.4; color: var(--lv-text);
  transition: background var(--lv-dur) var(--lv-ease), border-color var(--lv-dur) var(--lv-ease);
}
.hc-vote__r:hover span { background: var(--lv-tint); }
.hc-vote__r input:checked + span { background: var(--lv-wash); border-color: color-mix(in srgb, var(--color-primary) 55%, var(--lv-border)); color: var(--lv-brand-deep); font-weight: 600; }
.hc-vote__r input:focus-visible + span { box-shadow: var(--lv-focus); }
.hc-vote__note {
  width: 100%; min-height: 84px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--lv-border); resize: vertical;
  background: var(--lv-surface); color: var(--lv-ink); font: 400 15px/1.55 var(--lv-font);
}
.hc-vote__note::placeholder { color: var(--lv-muted); }
.hc-vote__note:focus { outline: none; border-color: var(--color-primary); box-shadow: var(--lv-focus); }
.hc-vote__foot { display: flex; justify-content: flex-end; }
.hc-vote__done { font-size: 15px; line-height: 1.6; font-weight: 600; color: var(--lv-brand-deep); }

/* Bài tiếp theo */
.hc-next {
  display: grid; gap: 3px; margin-top: 36px; padding: 16px 20px; border-radius: 16px; border: 1px solid var(--lv-border);
  background: var(--lv-tint); transition: border-color var(--lv-dur) var(--lv-ease);
}
.hc-next span { font-size: 13.5px; color: var(--lv-muted); }
.hc-next b { font-size: 17px; line-height: 1.35; font-weight: 750; color: var(--lv-ink); }
.hc-next:hover { border-color: color-mix(in srgb, var(--color-primary) 45%, var(--lv-border)); }
.hc-next:hover b { color: var(--lv-brand-deep); }

/* ═══ Vẫn cần giúp? ═══ */
.hc-need { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 18px 28px; padding: 26px 28px; }
.hc-need h2 { font-size: 22px; line-height: 1.3; font-weight: 800; letter-spacing: -.02em; }
.hc-need p { margin-top: 6px; max-width: 60ch; font-size: 14.5px; line-height: 1.6; color: var(--lv-on-2); }
.hc-need__btns { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.hc-need__btns .lv-btn { height: 46px; }

/* ═══ Xem ảnh lớn ═══ */
.hc-zoom {
  position: fixed; inset: 0; z-index: 3100; display: grid; place-items: center; padding: 64px 16px 20px; overflow: auto;
  background: color-mix(in srgb, var(--lv-shade) 86%, transparent); overscroll-behavior: contain; animation: hc-fade var(--lv-dur) var(--lv-ease) both;
}
.hc-zoom img { max-width: min(1600px, 100%); max-height: calc(100vh - 88px); width: auto; height: auto; border-radius: 12px; background: var(--color-surface); box-shadow: 0 30px 80px -30px black; }
.hc-zoom__x {
  position: fixed; top: 12px; right: 12px; width: 46px; height: 46px; display: grid; place-items: center; border: 0; border-radius: 13px;
  background: var(--lv-glass-2); color: var(--lv-on); cursor: pointer;
}
.hc-zoom__x svg { fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }
.hc-zoom__x:focus-visible { outline: 2px solid var(--lv-on); outline-offset: 2px; }
@keyframes hc-fade { from { opacity: 0 } to { opacity: 1 } }

/* ═══ Khổ hẹp ═══ */
@media (max-width: 1023px) {
  .hc-hero { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .hc-title { font-size: 34px; }
  .hc-title--sub { font-size: 30px; }
  .hc-title--art { font-size: 28px; }
  .hc-body { margin-top: -64px; }
  .hc-cols { grid-template-columns: minmax(0, 1fr); }
  .hc-side { position: static; }
  .hc-need { grid-template-columns: minmax(0, 1fr); }
  .hc-need__btns { justify-content: flex-start; }
}
@media (max-width: 640px) {
  .hc-band { --lv-band-pb: 86px; }
  .hc-band--hub { --lv-band-pb: 92px; }
  .hc-title { font-size: 30px; }
  .hc-title--art { font-size: 25px; }
  .hc-lead { font-size: 15px; }
  .hc-search { margin-top: 20px; }
  .hc-search input { height: 54px; font-size: 16px; }   /* 16px: iPhone không tự phóng to khi bấm vào ô */
  .hc-pop, .hc-results { padding: 18px 16px 20px; }
  .hc-doc { padding: 20px 16px 22px; }
  .hc-prose { font-size: 15.5px; }
  .hc-h2 { font-size: 20px; margin-top: 32px !important; }
  .hc-step { margin-top: 22px; padding-top: 22px; }
  .hc-step__h { gap: 12px; }
  .hc-step__n { width: 32px; height: 32px; font-size: 15px; }
  .hc-step__h h3 { font-size: 17.5px; }
  .hc-step__b { padding-left: 0; }
  .hc-step__b > :is(.hc-shot, .hc-table, .hc-see) { margin-left: 0; }
  /* Bảng 3 cột trở lên: mỗi dòng một khung, tên cột (data-th) đứng trên từng ô */
  .hc-table--stack { border: 0; border-radius: 0; overflow: visible; }
  .hc-table--stack :is(table, tbody, tr, td) { display: block; width: 100%; }
  .hc-table--stack thead { display: none; }
  .hc-table--stack tr { border: 1px solid var(--lv-hair); border-radius: 14px; padding: 6px 0; }
  .hc-table--stack tr + tr { margin-top: 10px; }
  .hc-table--stack td { border-top: 0; padding: 6px 14px; }
  .hc-table--stack td:empty { display: none; }
  .hc-table--stack td::before { content: attr(data-th); display: block; margin-bottom: 2px; font-size: 12.5px; font-weight: 700; color: var(--lv-muted); }
  .hc-table--stack td:first-child { font-weight: 700; color: var(--lv-ink); }   /* ô đầu = tên dòng, đứng như tiêu đề khung */
  .hc-table--stack td:first-child::before { content: none; }
  .hc-legend li { font-size: 14.5px; }
  .hc-arow { grid-template-columns: 30px minmax(0, 1fr); gap: 12px; padding: 16px; }
  .hc-arow__n { width: 30px; height: 30px; font-size: 13px; }
  .hc-arow__img { display: none; }
  .hc-group__cover { height: 136px; }
  .hc-need { padding: 22px 18px; }
  .hc-need__btns { flex-direction: column; align-items: stretch; }
  .hc-need__btns .lv-btn { flex: none; width: 100%; min-height: 48px; }
  .hc-zoom { padding: 60px 8px 12px; }
  .hc-vote__btns { width: 100%; }
  .hc-vote__btns .lv-btn { flex: 1 1 0; height: 44px; }
  .hc-vote__foot .lv-btn { width: 100%; height: 44px; }
}
@media (prefers-reduced-motion: reduce) { .hc-zoom { animation: none; } .hc-start a, .hc-pill, .hc-arow__n, .hc-next, .hc-see__it, .hc-vote__r span { transition: none; } }