/* ============================================================
   ANTERTECH — Visualization & Animation layer
   Sơ đồ đường truyền · biểu đồ · số đếm · chuyển động
   ============================================================ */

/* ---------- 1. SVG DATA FLOW ---------- */
.viz{
  width:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:var(--s-5);
  box-shadow:var(--shadow-md);
}
.viz--glass{
  background:rgba(255,255,255,.045);
  border-color:rgba(255,255,255,.13);
  backdrop-filter:blur(8px);
  box-shadow:0 30px 60px rgba(0,0,0,.28);
}
.viz__head{
  display:flex;align-items:center;justify-content:space-between;gap:var(--s-3);
  font-size:var(--t-xs);font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:var(--s-4);
}
.viz--glass .viz__head{color:#94A9B4}
.viz__live{display:inline-flex;align-items:center;gap:var(--s-2);color:var(--brand-strong)}
.viz--glass .viz__live{color:var(--brand-soft)}
.viz__live .dot{
  width:7px;height:7px;border-radius:50%;background:currentColor;
  animation:vz-pulse 2.2s var(--ease-out) infinite;
}
@keyframes vz-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.3;transform:scale(.75)}}
.viz svg{width:100%;height:auto;display:block;overflow:visible}

/* nút trong sơ đồ */
.vz-node{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.5}
.viz--glass .vz-node{fill:rgba(255,255,255,.06);stroke:rgba(255,255,255,.18)}
.vz-node--brand,.viz--glass .vz-node--brand{fill:var(--brand-strong);stroke:var(--brand-strong)}
.vz-node--gold,.viz--glass .vz-node--gold{fill:var(--gold);stroke:var(--gold)}
.vz-node--ink{fill:var(--ink);stroke:var(--ink)}
.viz--glass .vz-node--ink{fill:rgba(255,255,255,.1);stroke:rgba(255,255,255,.22)}

.vz-label{font-family:inherit;font-size:15px;font-weight:700;fill:var(--text)}
.viz--glass .vz-label{fill:#EAF2F5}
.vz-label--on,.viz--glass .vz-label--on{fill:var(--on-brand)}
.vz-label--gold,.viz--glass .vz-label--gold{fill:#2A2113}
.vz-sub{font-family:inherit;font-size:12px;font-weight:500;fill:var(--text-3);letter-spacing:.02em}
.viz--glass .vz-sub{fill:#93A9B4}
.vz-sub--on,.viz--glass .vz-sub--on{fill:var(--on-brand);opacity:.8}
.vz-sub--gold,.viz--glass .vz-sub--gold{fill:#4A3C1F;opacity:.9}

/* đường truyền */
.vz-wire{
  fill:none;stroke:var(--line-strong);stroke-width:1.5;stroke-linecap:round;
}
.viz--glass .vz-wire{stroke:rgba(255,255,255,.2)}
.vz-wire--dash{
  stroke:var(--brand);stroke-width:1.6;stroke-dasharray:5 9;
  animation:vz-dash 1.1s linear infinite;
  opacity:.85;
}
@keyframes vz-dash{to{stroke-dashoffset:-28}}

/* gói dữ liệu chạy trên đường truyền */
.vz-packet{fill:var(--brand-strong);filter:drop-shadow(0 0 5px rgba(92,139,110,.85))}
.viz--glass .vz-packet{fill:#B6DCC4;filter:drop-shadow(0 0 6px rgba(143,183,156,.9))}
.vz-packet--gold{fill:var(--gold);filter:drop-shadow(0 0 6px rgba(216,178,106,.9))}

/* vòng loang quanh hub */
.vz-ripple{
  fill:none;stroke:var(--brand);stroke-width:1.4;opacity:0;
  transform-origin:center;
  animation:vz-ripple 3.2s var(--ease-out) infinite;
}
@keyframes vz-ripple{
  0%{opacity:.55;transform:scale(.55)}
  70%{opacity:0;transform:scale(1.25)}
  100%{opacity:0;transform:scale(1.25)}
}
.vz-ripple--gold{stroke:var(--gold);animation-duration:2.8s}

/* icon vẽ trong node (AI, đũa phép) */
.vz-ico{fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.vz-ico--on{stroke:var(--on-brand)}
.vz-ico--gold{stroke:var(--gold);filter:drop-shadow(0 0 3px rgba(216,178,106,.7))}

/* ---------- Sơ đồ HERO: to rõ hơn + nhiều chuyển động ---------- */
/* khung sơ đồ cao bằng cột trái, sơ đồ căn giữa theo chiều dọc */
.hero .viz{display:flex;flex-direction:column}
.hero .viz > svg{margin-block:auto}
.hero .viz .vz-label{font-size:17px}
.hero .viz .vz-sub{font-size:12px;font-weight:600}
.hero .viz .vz-wire{stroke-width:2}
.hero .viz .vz-wire--dash{stroke-width:2.4;opacity:1;stroke:var(--brand-soft)}
.hero .viz .vz-packet{filter:drop-shadow(0 0 8px rgba(143,183,156,1))}
.hero .viz .vz-packet--gold{filter:drop-shadow(0 0 8px rgba(216,178,106,1))}
/* các node màu "thở" phát sáng, lệch nhịp cho sinh động */
.hero .viz .vz-node--brand{animation:vz-glow-green 3s var(--ease-out) infinite}
.hero .viz .vz-node--gold{animation:vz-glow-gold 3s var(--ease-out) infinite .6s}
.hero .viz .vz-node--ink{animation:vz-glow-gold 3s var(--ease-out) infinite 1.2s}
@keyframes vz-glow-green{
  0%,100%{filter:drop-shadow(0 0 1px rgba(143,183,156,.15))}
  50%{filter:drop-shadow(0 0 10px rgba(143,183,156,.6))}
}
@keyframes vz-glow-gold{
  0%,100%{filter:drop-shadow(0 0 1px rgba(216,178,106,.15))}
  50%{filter:drop-shadow(0 0 11px rgba(216,178,106,.65))}
}
/* Điện thoại nhỏ: cho riêng sơ đồ cuộn ngang trong khung để chữ đủ to.
   Trang vẫn không cuộn ngang vì overflow được chặn trong .viz. */
@media (max-width:600px){
  .hero .viz{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
  .hero .viz > svg{min-width:560px}
}

/* ---------- 1b. CHỮ GÕ (TYPEWRITER) ---------- */
/* "Dòng chảy dữ liệu, sức mạnh tự động" — câu chủ đạo */
.hero h1{
  font-size:clamp(2.1rem,4.4vw,3.55rem);
  font-weight:800;letter-spacing:-.03em;line-height:1.16;
  color:#fff;margin-bottom:var(--s-4);
}
/* "sức mạnh tự động" — dải sáng quét qua chữ + gạch chân tự vẽ */
.hero h1 .accent{
  position:relative;display:inline-block;
  background:linear-gradient(100deg,
    var(--brand-soft) 0%,#CFE3D7 26%,#FFFFFF 40%,
    var(--gold) 56%,#CFE3D7 74%,var(--brand-soft) 100%);
  background-size:260% 100%;background-position:0% 50%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:sheen 7s var(--ease-out) infinite;
}
.hero h1 .accent::after{
  content:"";position:absolute;left:0;right:0;bottom:-.14em;height:3px;
  border-radius:2px;background:linear-gradient(90deg,var(--brand-soft),var(--gold));
  transform:scaleX(0);transform-origin:left center;
  transition:transform 900ms var(--ease-out) 620ms;
}
.hero h1.is-visible .accent::after{transform:scaleX(1)}
@keyframes sheen{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}

.hero__sub{
  font-size:clamp(.9rem,1.05vw,.98rem);
  font-weight:300;line-height:1.65;color:#9FB3BD;
  max-width:52ch;margin-bottom:var(--s-6);
}
.type{
  display:inline-block;min-width:8.5ch;
  font-weight:700;color:var(--brand-soft);
  white-space:nowrap;
}
.type::after{
  content:"";display:inline-block;
  width:2px;height:1em;margin-left:5px;vertical-align:-.12em;
  background:var(--gold);
  animation:tw-blink 1s step-end infinite;
}
.type--static{color:var(--brand-soft)}
.type--static::after{display:none}
@keyframes tw-blink{0%,100%{opacity:1}50%{opacity:0}}

/* ---------- 2. SỐ ĐẾM ---------- */
.metric{text-align:left}
.metric__k{
  font-size:clamp(2rem,4.4vw,3rem);font-weight:800;letter-spacing:-.035em;line-height:1;
  color:var(--brand-strong);font-variant-numeric:tabular-nums;
}
.metric__k .unit{font-size:.5em;font-weight:700;margin-left:2px}
.metric__v{font-size:var(--t-sm);color:var(--text-2);margin-top:var(--s-2);max-width:24ch}
.metric--on-dark .metric__k{color:var(--gold)}
.metric--on-dark .metric__v{color:#A9BCC5}

/* ---------- 3. BIỂU ĐỒ CỘT ---------- */
.chart{display:grid;gap:var(--s-4)}
.chart__row{display:grid;grid-template-columns:132px 1fr auto;gap:var(--s-4);align-items:center}
@media (max-width:560px){
  .chart__row{grid-template-columns:1fr auto;gap:var(--s-2) var(--s-3)}
  .chart__name{grid-column:1/-1}
}
.chart__name{font-size:var(--t-sm);font-weight:600;color:var(--text-2)}
.chart__track{
  position:relative;height:12px;border-radius:var(--r-full);
  background:var(--surface-2);overflow:hidden;
}
.section--ink .chart__track{background:rgba(255,255,255,.09)}
.chart__fill{
  position:absolute;inset:0 auto 0 0;width:0;border-radius:var(--r-full);
  background:linear-gradient(90deg,var(--brand),var(--brand-strong));
  transition:width 1100ms var(--ease-out);
}
.chart__fill--muted{background:linear-gradient(90deg,#C3CFC7,#9FB0A5)}
.section--ink .chart__fill--muted{background:linear-gradient(90deg,#4B5C68,#3A4854)}
.chart__fill--gold{background:linear-gradient(90deg,#E8CB94,var(--gold))}
.is-visible .chart__fill{width:var(--v,0%)}
.chart__val{
  font-size:var(--t-sm);font-weight:700;color:var(--text);
  font-variant-numeric:tabular-nums;min-width:52px;text-align:right;
}
.section--ink .chart__val{color:#fff}
.chart__legend{
  display:flex;flex-wrap:wrap;gap:var(--s-4);margin-top:var(--s-5);
  font-size:var(--t-sm);color:var(--text-2);
}
.chart__legend span{display:inline-flex;align-items:center;gap:var(--s-2)}
.chart__legend i{width:12px;height:12px;border-radius:4px;display:block}
.section--ink .chart__legend{color:#A9BCC5}

/* ---------- 4. VÒNG TRÒN TIẾN ĐỘ ---------- */
.donut{display:flex;align-items:center;gap:var(--s-5)}
.donut__svg{width:112px;height:112px;flex:none;transform:rotate(-90deg)}
.donut__track{fill:none;stroke:var(--surface-2);stroke-width:11}
.section--ink .donut__track{stroke:rgba(255,255,255,.1)}
.donut__val{
  fill:none;stroke:var(--brand-strong);stroke-width:11;stroke-linecap:round;
  stroke-dasharray:var(--dash,302);stroke-dashoffset:var(--dash,302);
  transition:stroke-dashoffset 1300ms var(--ease-out);
}
.donut__val--gold{stroke:var(--gold)}
.is-visible .donut__val{stroke-dashoffset:var(--offset,302)}
.donut__meta b{
  display:block;font-size:1.9rem;font-weight:800;letter-spacing:-.03em;line-height:1;
  color:var(--text);font-variant-numeric:tabular-nums;
}
.section--ink .donut__meta b{color:#fff}
.donut__meta span{font-size:var(--t-sm);color:var(--text-2);display:block;margin-top:var(--s-2);max-width:22ch}
.section--ink .donut__meta span{color:#A9BCC5}

/* ---------- 5. BĂNG CHẠY CÔNG NGHỆ ---------- */
.marquee{
  position:relative;overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.marquee__track{display:flex;width:max-content;gap:var(--s-3);animation:vz-marquee 34s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes vz-marquee{to{transform:translateX(-50%)}}
.marquee__item{
  display:inline-flex;align-items:center;gap:var(--s-2);white-space:nowrap;
  padding:var(--s-3) var(--s-5);border-radius:var(--r-full);
  background:var(--surface);border:1px solid var(--line);
  font-weight:600;font-size:var(--t-sm);color:var(--text-2);
}
.marquee__item svg{color:var(--brand-strong);flex:none}
.section--ink .marquee__item{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.13);color:#C3D1D9}
.section--ink .marquee__item svg{color:var(--brand-soft)}

/* ---------- 6. TIMELINE CÓ THANH TIẾN ĐỘ ---------- */
.track{position:relative;padding-left:0}
.track__line{
  position:absolute;left:23px;top:24px;bottom:24px;width:2px;
  background:var(--line);overflow:hidden;
}
.track__line::after{
  content:"";position:absolute;inset:0 0 auto 0;height:var(--progress,0%);
  background:linear-gradient(180deg,var(--brand),var(--brand-strong));
  transition:height 260ms linear;
}
.track .step::before{display:none}
.step__num{transition:background-color var(--dur) var(--ease-out),color var(--dur) var(--ease-out),transform var(--dur) var(--ease-out)}
.step.is-active .step__num{background:var(--brand-strong);color:var(--on-brand);transform:scale(1.08)}

/* ---------- 7. THẺ NỔI / HOVER TILT ---------- */
.tile{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:var(--s-6);
  transition:transform var(--dur) var(--ease-out),box-shadow var(--dur) var(--ease-out),border-color var(--dur) var(--ease-out);
}
.tile::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--gold));
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-slow) var(--ease-out);
}
.tile:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--line-strong)}
.tile:hover::before{transform:scaleX(1)}
.tile h3{margin-bottom:var(--s-2)}
.tile p{color:var(--text-2);margin-bottom:0;font-size:var(--t-sm)}
.tile__ico{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  background:var(--brand-tint);color:var(--brand-strong);margin-bottom:var(--s-4);
  transition:transform var(--dur) var(--ease-out);
}
.tile:hover .tile__ico{transform:scale(1.08) rotate(-4deg)}
.section--ink .tile{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.13)}
.section--ink .tile h3{color:#fff}
.section--ink .tile p{color:#B0C1CA}
.section--ink .tile__ico{background:rgba(143,183,156,.16);color:var(--brand-soft)}

/* ---------- 8. TRƯỚC / SAU ---------- */
.compare{display:grid;gap:var(--s-4)}
@media (min-width:800px){.compare{grid-template-columns:1fr auto 1fr;align-items:center}}
.compare__side{
  border-radius:var(--r-lg);padding:var(--s-6);border:1px solid var(--line);background:var(--surface);
}
.compare__side--after{background:var(--brand-tint);border-color:var(--brand)}
.compare__tag{
  font-size:var(--t-xs);font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:var(--s-3);
}
.compare__side--after .compare__tag{color:var(--brand-strong)}
.compare__side p{margin:0;color:var(--text-2)}
.compare__side--after p{color:var(--text)}
.compare__arrow{
  display:grid;place-items:center;width:48px;height:48px;margin-inline:auto;
  border-radius:50%;background:var(--brand-strong);color:var(--on-brand);
}
@media (max-width:799px){.compare__arrow{transform:rotate(90deg)}}

/* ---------- 9. HIỆU ỨNG XUẤT HIỆN ---------- */
.rv{opacity:0;transform:translateY(26px)}
.rv.is-visible{
  opacity:1;transform:none;
  transition:opacity 620ms var(--ease-out),transform 620ms var(--ease-out);
}
.rv--left{transform:translateX(-28px)}
.rv--right{transform:translateX(28px)}
.rv--scale{transform:scale(.94)}
/* trên màn hẹp, không đẩy ngang để tránh tràn viewport */
@media (max-width:1023px){
  .rv--left,.rv--right{transform:translateY(26px)}
}
.rv.is-visible[data-delay="1"]{transition-delay:80ms}
.rv.is-visible[data-delay="2"]{transition-delay:160ms}
.rv.is-visible[data-delay="3"]{transition-delay:240ms}
.rv.is-visible[data-delay="4"]{transition-delay:320ms}
.rv.is-visible[data-delay="5"]{transition-delay:400ms}

/* dòng chữ lớn xuất hiện theo từ */
.split .word{
  display:inline-block;opacity:0;transform:translateY(18px);
  transition:opacity 520ms var(--ease-out),transform 520ms var(--ease-out);
}
.split.is-visible .word{opacity:1;transform:none}

/* ---------- 10. TÔN TRỌNG REDUCED MOTION ---------- */
@media (prefers-reduced-motion:reduce){
  .vz-wire--dash,.vz-ripple,.viz__live .dot,.marquee__track{animation:none !important}
  .hero .viz .vz-node--brand,.hero .viz .vz-node--gold,.hero .viz .vz-node--ink{animation:none !important;filter:none}
  .hero h1 .accent{animation:none;background-position:22% 50%}
  .hero h1 .accent::after{transition:none;transform:scaleX(1)}
  .vz-packet,.vz-packet--gold{display:none}
  .rv,.split .word{opacity:1 !important;transform:none !important}
  .chart__fill{transition:none;width:var(--v,0%)}
  .donut__val{transition:none;stroke-dashoffset:var(--offset,302)}
  .tile:hover{transform:none}
  .post:hover{transform:none}
  .toc__marker{transition:none}
  .toc__link.is-active{transform:none}
}

/* ============================================================
   BLOG — bộ lọc, thẻ bài viết, bài nổi bật, thân bài
   ============================================================ */
/* thanh lọc chủ đề */
.filterbar{display:flex;flex-wrap:wrap;gap:var(--s-3);margin-bottom:var(--s-7)}
.filter-chip{
  display:inline-flex;align-items:center;gap:var(--s-2);min-height:40px;
  padding:var(--s-2) var(--s-4);border-radius:var(--r-full);
  background:var(--surface);border:1px solid var(--line);
  font:inherit;font-size:var(--t-sm);font-weight:600;color:var(--text-2);
  cursor:pointer;transition:background .18s var(--ease-out),color .18s var(--ease-out),border-color .18s var(--ease-out);
}
.filter-chip:hover{border-color:var(--brand);color:var(--text)}
.filter-chip.is-active{background:var(--brand-strong);border-color:var(--brand-strong);color:var(--on-brand)}
.filter-chip__n{font-weight:700;opacity:.7;font-size:.85em}

/* thẻ bài viết */
.post{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:var(--s-5);text-decoration:none;color:inherit;
  transition:transform .2s var(--ease-out),box-shadow .2s var(--ease-out),border-color .2s var(--ease-out);
}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.post:focus-visible{outline:3px solid var(--brand-strong);outline-offset:3px}
.post__cat{
  display:inline-flex;align-self:flex-start;align-items:center;gap:var(--s-2);
  font-size:var(--t-xs);font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-strong);margin-bottom:var(--s-3);
}
.post__cat .dot{width:7px;height:7px;border-radius:50%;background:currentColor;flex:none}
.post h3{font-size:1.22rem;line-height:1.3;margin:0 0 var(--s-3)}
.post__excerpt{color:var(--text-2);margin:0 0 var(--s-4);font-size:.96rem}
.post__meta{
  margin-top:auto;display:flex;align-items:center;gap:var(--s-3);
  color:var(--text-3);font-size:var(--t-sm);
}
.post__meta span{display:inline-flex;align-items:center;gap:var(--s-2)}
.post__meta svg{flex:none}
.post[hidden]{display:none}

/* bài nổi bật */
.featured{
  display:grid;gap:0;border:1px solid var(--line);border-radius:var(--r-xl);
  overflow:hidden;background:var(--surface);margin-bottom:var(--s-8);
}
@media (min-width:900px){.featured{grid-template-columns:1.05fr .95fr}}
.featured__body{padding:var(--s-7)}
@media (min-width:900px){.featured__body{padding:var(--s-8)}}
.featured__body h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.2;margin:var(--s-3) 0 var(--s-4)}
.featured__body p{color:var(--text-2);margin:0 0 var(--s-6);max-width:48ch}
.featured__panel{
  position:relative;min-height:220px;display:grid;place-items:center;padding:var(--s-6);
  background:linear-gradient(135deg,var(--brand-strong),var(--ink));
}
.featured__panel svg{width:min(78%,320px);height:auto}

/* thân bài viết */
.prose{max-width:760px}
.prose>p{color:var(--text-2);line-height:1.75;margin:0 0 var(--s-5)}
.prose>h2{font-size:clamp(1.4rem,2.6vw,1.8rem);margin:var(--s-8) 0 var(--s-4);scroll-margin-top:90px}
.prose>h3{font-size:1.2rem;margin:var(--s-6) 0 var(--s-3)}
.prose>ul,.prose>ol{margin:0 0 var(--s-5);padding-left:1.25em;color:var(--text-2);line-height:1.7}
.prose>ul li,.prose>ol li{margin-bottom:var(--s-2)}
.prose>p>strong{color:var(--text)}
.prose figure{margin:var(--s-6) 0}
.article-head__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:var(--s-4);
  color:var(--text-3);font-size:var(--t-sm);margin-top:var(--s-4);
}
.article-head__meta span{display:inline-flex;align-items:center;gap:var(--s-2)}

/* bố cục bài viết: mục lục trái + nội dung phải */
.article-wrap{display:block}
@media (min-width:1000px){
  .article-wrap{
    display:grid;grid-template-columns:236px minmax(0,760px);
    gap:var(--s-9);align-items:start;justify-content:center;
  }
  .toc{position:sticky;top:96px;max-height:calc(100vh - 128px);overflow:auto;padding-right:var(--s-2)}
}
.toc{margin-bottom:var(--s-6)}
@media (max-width:999px){
  .toc{border:1px solid var(--line);border-radius:var(--r-lg);padding:var(--s-5);background:var(--surface-2)}
}
.toc__label{
  font-size:var(--t-xs);font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text-3);margin:0 0 var(--s-4);
}
.toc__nav{position:relative;display:flex;flex-direction:column;border-left:2px solid var(--line)}
.toc__marker{
  position:absolute;left:-2px;top:0;width:2px;height:0;border-radius:2px;
  background:var(--brand-strong);
  transition:transform .35s var(--ease-out),height .35s var(--ease-out);
}
.toc__link{
  padding:8px 0 8px 16px;color:var(--text-3);text-decoration:none;
  font-size:.92rem;line-height:1.4;
  transition:color .2s var(--ease-out),transform .2s var(--ease-out);
}
.toc__link:hover{color:var(--text)}
.toc__link:focus-visible{outline:2px solid var(--brand-strong);outline-offset:2px;border-radius:4px}
.toc__link.is-active{color:var(--brand-strong);font-weight:600}
@media (min-width:1000px){.toc__link.is-active{transform:translateX(3px)}}

/* callout thực chiến trong bài */
.callout{
  border:1px solid var(--line);border-left:3px solid var(--brand-strong);
  border-radius:var(--r-md);background:var(--surface-2);
  padding:var(--s-4) var(--s-5);margin:var(--s-5) 0;
}
.callout p{margin:0;color:var(--text-2)}
.callout b{color:var(--brand-strong)}