/* ---- p_45_bl-ai.css ---- */
/* =====================================================================
   AI FOR TRAVEL & EVENTS (.sk-ba) - phòng thí nghiệm prompt
   Hình khối: cửa sổ ứng dụng có chấm điều khiển, dòng lệnh "$", con trỏ nhấp nháy, huy hiệu vai
   (ROLE / CONTEXT / TASK / FORMAT / CONSTRAINTS), tia sao cam, băng cảnh báo sọc chéo (thay cho màu đỏ).
   Hệ màu: đen / trắng / cam #ff6a13 (+ xám). Một font Be Vietnam Pro; Anton chỉ cho số điểm. Mobile trước.
   ===================================================================== */
.sk-ba{--r:12px;--bw:1px;--hfw:800;--hls:-.04em;--bg:#0a0a0c;--bg2:#0e0e11;--card:#131317;--ln:rgba(255,255,255,.14);--aci:#0a0a0c;--wn:#0f0f12;--wb:#18181d;--tx:#ececf0}
.sk-ba h3{margin:0}
.sk-ba .s-chip.on,.sk-ba .s-seg button.on{color:#0a0a0c}
.sk-ba select{color-scheme:dark}
.sk-ba option{background:#16161b;color:#fff}
.ba-spr{position:absolute;width:0;height:0;overflow:hidden}
.ba-star{display:block;width:1em;height:1em;fill:currentColor;flex:none}
.sk-ba .ba-fine{margin:12px 0 0;max-width:68ch;font:400 13px/1.55 var(--fb);color:var(--mut)}
.sk-ba .ba-fine a{color:var(--ac);text-decoration:underline;text-underline-offset:3px}
.ba-ps{flex:none;margin-right:.6em;color:var(--ac);font-weight:800}
.ba-cur{display:inline-block;width:.55em;height:1.1em;margin-left:3px;vertical-align:-.2em;background:var(--ac)}
.sk-ba button:focus-visible,.sk-ba a:focus-visible{outline:2px solid var(--ac);outline-offset:3px}

/* =====================  HERO  ===================== */
.ba-hero{background:#0a0a0c;padding:clamp(100px,9vw,124px) 0 clamp(28px,5vw,72px)}
.ba-hero::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(circle,rgba(255,255,255,.1) 1px,transparent 1.5px) 0 0/22px 22px;-webkit-mask-image:linear-gradient(180deg,#000 30%,transparent);mask-image:linear-gradient(180deg,#000 30%,transparent)}
.ba-hero::after{content:"";position:absolute;z-index:-1;right:-34%;top:16%;width:min(92vw,720px);height:min(92vw,720px);border-radius:50%;background:radial-gradient(circle,rgba(255,106,19,.15),transparent 65%)}
.ba-hw{display:grid;gap:clamp(20px,4vw,40px);min-width:0}
.ba-hl,.ba-hr{min-width:0}
.sk-ba .ba-title{margin:0;font-size:clamp(50px,15.4vw,148px);line-height:.92;letter-spacing:-.055em;text-transform:none}
.ba-title .s-ml{padding-right:.1em}
.sk-ba .ba-title em{font-style:normal;color:var(--ac)}
.ba-tcur{width:.3em;height:.74em;margin-left:.1em;vertical-align:baseline}
.sk-ba .ba-sub{max-width:42ch;margin-top:14px;font-size:16px}
.sk-ba .ba-btns{margin-top:16px;gap:12px;flex-wrap:nowrap}
.sk-ba .ba-btns .btn{flex:1 1 0;min-width:0;padding-inline:12px}
.ba-sec{padding-block:clamp(40px,8vw,120px);scroll-margin-top:40px}
.ba-sp{position:absolute;z-index:0;color:var(--ac);pointer-events:none}
.ba-sp .ba-star{width:100%;height:100%}
.ba-sp1{width:24px;height:24px;right:8%;top:128px}
.ba-sp2{width:12px;height:12px;right:24%;top:186px;color:#fff;opacity:.75}
.ba-sp3{width:16px;height:16px;right:5%;top:236px}

/* ---------- cửa sổ ứng dụng (dùng cho hero và cho khung prompt) ---------- */
.ba-win{position:relative;min-width:0;border:1px solid var(--ln);border-radius:14px;background:var(--wn);overflow:hidden;box-shadow:0 34px 60px -34px rgba(0,0,0,.95)}
.ba-bar{display:flex;align-items:center;gap:12px;height:44px;padding:0 14px;background:var(--wb);border-bottom:1px solid var(--ln)}
.ba-dots{display:flex;flex:none;gap:7px}
.ba-dots i{width:11px;height:11px;border-radius:50%;background:var(--ac)}
.ba-dots i:nth-child(2){background:#fff}
.ba-dots i:nth-child(3){background:#5a5a63}
.ba-bar b{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font:700 13px/1 var(--fb);letter-spacing:.02em;color:var(--tx)}
.ba-bar em{flex:none;margin-left:auto;font:600 12px/1 var(--fb);font-style:normal;letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}

/* màn hình chat: ba kịch bản xếp chồng cùng một ô lưới nên chiều cao không bao giờ nhảy */
.ba-scr{display:grid;padding:16px 16px 6px;color:var(--tx);font-size:15px;line-height:1.5}
.ba-sc{grid-area:1/1;min-width:0;visibility:hidden}
.ba-sc.is-on{visibility:visible}
.sk-ba .ba-ln{display:flex;align-items:flex-start;margin:0;font-weight:500;color:#fff}
.ba-ty{display:grid;flex:1;min-width:0}
.ba-gh,.ba-tx{grid-area:1/1;min-width:0}
.ba-gh{visibility:hidden}
.ba-gh:empty{display:none}
.ba-tx .ba-cur{display:none}
.ba-sc.is-typing .ba-tx .ba-cur{display:inline-block}
.sk-ba .ba-idle{margin-top:6px;min-height:26px;align-items:center}
.sk-ba .ba-who{display:flex;align-items:center;gap:8px;margin:12px 0 4px;font:600 13px/1.2 var(--fb);color:var(--mut)}
.ba-who .ba-star{width:14px;height:14px;color:var(--ac)}
.ba-who b{font-weight:700;color:var(--ac)}
.ba-s1,.ba-tk{display:none}
.ba-tk u{width:5px;height:5px;border-radius:50%;background:var(--ac);text-decoration:none}
.ba-tk{gap:3px;align-items:center}
.ba-sc.is-think .ba-s1{display:inline}
.ba-sc.is-think .ba-tk{display:inline-flex}
.ba-sc.is-think .ba-s2{display:none}

.sk-ba .ba-out{display:grid;margin:0;padding:0;list-style:none}
.sk-ba .ba-out>li{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:baseline;gap:2px 10px;margin:0;padding:6px 0;border-top:1px dashed rgba(255,255,255,.12);font-size:15px;line-height:1.4;transition:opacity .45s,transform .45s cubic-bezier(.16,1,.3,1)}
.sk-ba .ba-out>li.ba-hd{display:block;padding:9px 0 3px;border-top:0;font:700 12px/1.2 var(--fb);letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.ba-tm{min-width:3.1em;font-weight:700;font-variant-numeric:tabular-nums;color:var(--ac)}
.ba-ck{align-self:center;justify-self:end;padding:3px 8px;border:1px solid rgba(255,106,19,.6);border-radius:99px;font:700 12px/1.2 var(--fb);color:var(--ac);white-space:nowrap}
.sk-ba .ba-out>li.ba-nt{display:flex;align-items:flex-start;gap:10px;color:var(--mut);font-size:14.5px}
.ba-nt .ba-ck{flex:none}
.sk-ba .ba-cost>li{grid-template-columns:minmax(0,1fr) auto;row-gap:6px}
.ba-cost small{margin-left:8px;font-size:13px;font-weight:600;color:var(--mut)}
.ba-cost b{font-weight:700;font-variant-numeric:tabular-nums;color:#fff}
.ba-cost i{position:relative;grid-column:1/-1;height:6px;border-radius:6px;background:rgba(255,255,255,.1);overflow:hidden}
.ba-cost i::after{content:"";position:absolute;inset:0;border-radius:inherit;background:var(--ac);transform:scaleX(var(--v,0));transform-origin:0 50%;transition:transform .9s cubic-bezier(.16,1,.3,1) .1s}
.sk-ba .ba-cost>li.ba-tot{border-top:1px solid rgba(255,255,255,.45);font-weight:800;color:#fff}
.ba-tot b{font-size:18px;color:var(--ac)}
.sk-ba .ba-mail>li{display:block;color:var(--tx)}
.ba-k{margin-right:8px;font-weight:700;color:var(--mut)}
.ba-ph{background:none;color:var(--ac);font-weight:600}
/* trạng thái "đang chạy": dòng chưa tới lượt thì ẩn (chỉ khi có JS) */
.kx-js .ba-sc.is-arm .ba-out>li:not(.is-on){opacity:0;transform:translateY(8px)}
.kx-js .ba-sc.is-arm .ba-cost>li:not(.is-on) i::after{transform:scaleX(0)}
.kx-js .ba-sc.is-arm:not(.is-think):not(.is-done) .ba-who{opacity:0}
.kx-js .ba-sc.is-arm:not(.is-done) .ba-idle{opacity:0}

.ba-foot{display:flex;align-items:center;gap:10px;padding:10px 12px 12px;border-top:1px solid var(--ln)}
.ba-tabs{flex:1;min-width:0}
.ba-tabs button{padding:0 6px}
.ba-rep{display:grid;flex:none;place-items:center;width:54px;height:54px;border:1px solid var(--ln);border-radius:calc(var(--r) + 6px);background:transparent;color:var(--ink);cursor:pointer;transition:border-color .25s,color .25s}
.ba-rep svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.ba-rep:active svg{transform:rotate(-150deg)}

/* =====================  KHUNG CHUNG CÁC MỤC  ===================== */
.sk-ba .ba-cmd{display:flex;align-items:center;min-height:24px;margin:0 0 12px;font:600 14px/1.4 var(--fb);letter-spacing:.03em;color:var(--tx)}
.ba-cmd .ba-cur{width:.5em;height:1em;vertical-align:baseline}
.sk-ba .ba-head .s-h{text-wrap:balance}
.s-mq.out{border-color:var(--ln)}

/* =====================  01 · TRÌNH DỰNG PROMPT  ===================== */
.ba-lab{display:grid;gap:18px;min-width:0}
.ba-ctl{display:grid;gap:16px;align-content:start;min-width:0}
.sk-ba .ba-step{display:flex;align-items:center;gap:10px;margin:0;font:700 12.5px/1.2 var(--fb);letter-spacing:.12em;text-transform:uppercase;color:var(--mut)}
.ba-step b{display:grid;place-items:center;flex:none;width:24px;height:24px;border-radius:50%;background:var(--ac);color:#0a0a0c;font:800 13px/1 var(--fb);letter-spacing:0}
.ba-ctl>.ba-step:not(:first-child){margin-top:2px;padding-top:16px;border-top:1px solid var(--ln)}
.sk-ba .ba-tasks{margin:-6px 0 0;padding:0;flex-wrap:wrap;overflow:visible}
.sk-ba .ba-tasks .s-chip{flex:1 1 auto;padding-inline:12px}
.sk-ba .ba-tone button{padding-inline:4px;white-space:nowrap}
.ba-ow{min-width:0}
.ba-pw{display:flex;flex-direction:column}
.ba-pb{display:grid;padding:4px 16px 0}
.ba-blk{display:grid;grid-template-rows:1fr;border-bottom:1px dashed rgba(255,255,255,.14);transition:grid-template-rows .55s cubic-bezier(.16,1,.3,1),opacity .4s}
.ba-blk:last-child{border-bottom:0}
.ba-blk>div{min-height:0;overflow:hidden;padding:9px 0 9px 12px;border-left:3px solid transparent}
.ba-blk.is-off{grid-template-rows:0fr;opacity:0;border-bottom-color:transparent}
.sk-ba .ba-bh{display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px;margin:0 0 6px}
.ba-bd{display:inline-block;padding:5px 8px 4px;border:1px solid transparent;border-radius:5px;font:800 12px/1 var(--fb);letter-spacing:.12em}
.ba-bh span{font:500 13px/1.3 var(--fb);color:var(--mut)}
.ba-blk[data-k=role] .ba-bd{background:var(--ac);color:#0a0a0c}
.ba-blk[data-k=ctx] .ba-bd{border-color:#fff;color:#fff}
.ba-blk[data-k=task] .ba-bd{background:#fff;color:#0a0a0c}
.ba-blk[data-k=fmt] .ba-bd{border-color:var(--ac);color:var(--ac)}
.ba-blk[data-k=con] .ba-bd{border-color:#7a7a85;color:#c4c4cc}
.ba-blk[data-k=ver] .ba-bd{border:1px dashed var(--ac);color:var(--ac)}
.sk-ba .ba-bt{margin:0;font-size:15px;line-height:1.55;color:var(--tx)}
.ba-pf{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px 16px;border-top:1px solid var(--ln)}
.sk-ba .ba-phn{margin:0;font:500 13.5px/1.4 var(--fb);color:var(--mut)}
.ba-phn b{color:var(--ac)}
.ba-pf .btn{display:none}
.ba-copy.is-done{background:#fff;color:#0a0a0c}
.ba-dock{margin-top:2px}
.ba-dock>div{min-width:0}

/* =====================  02 · AI GIÚP GÌ Ở TỪNG BƯỚC  ===================== */
.ba-flow{display:grid;gap:18px;min-width:0}
.ba-pipe{--p:0;position:relative;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding-top:4px}
.ba-pipe::before{content:"";position:absolute;left:10%;right:10%;top:26px;height:2px;background:var(--ln)}
.ba-pfill{position:absolute;left:10%;top:26px;height:2px;width:calc(80% * var(--p));background:var(--ac);transition:width .7s cubic-bezier(.16,1,.3,1)}
.ba-spark{position:absolute;z-index:2;top:2px;left:calc(10% + 80% * var(--p) + 15px);width:15px;height:15px;color:#fff;pointer-events:none;transition:left .7s cubic-bezier(.16,1,.3,1)}
.ba-spark .ba-star{width:100%;height:100%}
.ba-nd{position:relative;display:grid;justify-items:center;align-content:start;gap:8px;min-height:78px;padding:0;border:0;background:none;color:var(--mut);cursor:pointer;-webkit-tap-highlight-color:transparent}
.ba-nd i{display:grid;place-items:center;width:44px;height:44px;border:2px solid var(--ln);border-radius:50%;background:var(--bg2);color:var(--tx);font:800 14px/1 var(--fb);font-style:normal;transition:background .35s,border-color .35s,color .35s,transform .45s cubic-bezier(.34,1.56,.64,1)}
.ba-nd span{font:600 12.5px/1.2 var(--fb)}
.ba-nd.is-done i{border-color:var(--ac);color:var(--ac)}
.ba-nd.on i{background:var(--ac);border-color:var(--ac);color:#0a0a0c;transform:scale(1.12)}
.ba-nd.on span{color:#fff}
.ba-mode button[data-m=human].on{background:#fff;color:#0a0a0c}
.ba-fp{position:relative;padding:18px 16px 16px;border:1px solid rgba(255,106,19,.55);border-radius:16px;background:var(--card);transition:border-color .4s}
.ba-fp[data-m=human]{border-color:rgba(255,255,255,.6)}
.sk-ba .ba-fh{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 10px;margin:0 0 14px}
.ba-fh>b{font:800 17px/1.2 var(--fb);letter-spacing:-.02em}
.ba-tg{display:inline-flex;align-items:center;gap:7px;padding:7px 12px 7px 10px;border-radius:99px;font:800 12px/1 var(--fb);letter-spacing:.1em;text-transform:uppercase;background:var(--ac);color:#0a0a0c}
.ba-fp[data-m=human] .ba-tg{background:#fff}
.ba-tg svg{width:13px;height:13px}
.sk-ba .ba-fl{display:grid;gap:14px;margin:0;padding:0;list-style:none}
.sk-ba .ba-fl li{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;align-items:start}
.ba-fi-i{display:grid;place-items:center;width:34px;height:34px;border:1px solid rgba(255,106,19,.5);border-radius:10px;background:rgba(255,106,19,.1);color:var(--ac)}
.ba-fp[data-m=human] .ba-fi-i{border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.07);color:#fff}
.ba-fi-i svg{width:16px;height:16px}
.ba-lk{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ba-fl b{display:block;font:700 15.5px/1.3 var(--fb);color:#fff}
.ba-fl small{display:block;margin-top:2px;font:400 15px/1.45 var(--fb);color:var(--mut)}
.sk-ba .ba-meter{display:flex;align-items:center;flex-wrap:wrap;gap:6px 12px;margin:16px 0 0;padding-top:14px;border-top:1px dashed var(--ln);font:500 13.5px/1.35 var(--fb);color:var(--mut)}
.ba-mt{display:inline-flex;gap:4px}
.ba-mt u{width:22px;height:8px;border-radius:2px;background:rgba(255,255,255,.12);text-decoration:none}
.ba-mt u.on{background:var(--ac)}
.sk-ba .ba-gate{display:flex;align-items:flex-start;gap:12px;margin:16px 0 0;padding:12px 14px;border:1px solid rgba(255,255,255,.5);border-radius:12px;background:repeating-linear-gradient(135deg,rgba(255,255,255,.06) 0 8px,transparent 8px 16px)}
.ba-gate svg{flex:none;width:20px;height:20px;margin-top:2px}
.ba-gate b{display:block;margin-bottom:3px;font:800 12px/1.2 var(--fb);letter-spacing:.12em;text-transform:uppercase;color:#fff}
.ba-gate span{font:500 15px/1.45 var(--fb);color:var(--tx)}
.ba-use{width:100%;margin-top:16px}

/* =====================  03 · KIỂM CHỨNG ĐẦU RA  ===================== */
.ba-chk{display:grid;gap:14px;min-width:0}
.ba-cw{min-width:0}
.ba-ch{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 10px;font:600 13.5px/1.3 var(--fb);color:var(--mut)}
.ba-rs{min-height:44px;padding:0 16px;border:1px solid var(--ln);border-radius:99px;background:transparent;color:var(--ink);font:600 14px var(--fb);cursor:pointer;transition:border-color .25s,color .25s}
.sk-ba .ba-cl{display:grid;gap:6px;margin:0;padding:0;list-style:none}
.ba-cl>li{min-width:0}
.ba-it{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;align-items:start;width:100%;min-height:60px;padding:10px 12px;border:1px solid var(--ln);border-radius:14px;background:var(--card);color:var(--ink);text-align:left;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:border-color .25s,background .25s}
.ba-bx{display:grid;place-items:center;width:28px;height:28px;margin-top:1px;border:2px solid rgba(255,255,255,.35);border-radius:8px;transition:background .25s,border-color .25s}
.ba-bx svg{width:18px;height:18px;fill:none;stroke:#0a0a0c;stroke-width:3.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:24;stroke-dashoffset:24;transition:stroke-dashoffset .35s cubic-bezier(.16,1,.3,1) .05s}
.ba-it[aria-checked=true]{border-color:rgba(255,106,19,.7);background:rgba(255,106,19,.07)}
.ba-it[aria-checked=true] .ba-bx{border-color:var(--ac);background:var(--ac)}
.ba-it[aria-checked=true] .ba-bx svg{stroke-dashoffset:0}
.ba-it-t{min-width:0}
.ba-it-t b{display:flex;align-items:center;flex-wrap:wrap;gap:4px 10px;font:700 15.5px/1.3 var(--fb);color:#fff}
.ba-it-t small{display:block;margin-top:3px;font:400 15px/1.4 var(--fb);color:var(--mut)}
.ba-must{padding:3px 7px;border:1px solid rgba(255,106,19,.6);border-radius:99px;font:700 12px/1.1 var(--fb);letter-spacing:.06em;text-transform:uppercase;color:var(--ac)}
.ba-res{position:sticky;bottom:calc(12px + env(safe-area-inset-bottom,0px));z-index:6;display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:14px;padding:12px 16px 12px 12px;border:1px solid rgba(255,106,19,.6);border-radius:18px;background:rgba(14,14,17,.94);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 18px 44px rgba(0,0,0,.6)}
.ba-rgw{position:relative;width:68px;height:68px}
.ba-rg{width:100%;height:100%;transform:rotate(-90deg)}
.ba-rg circle{fill:none;stroke-width:9}
.ba-rt{stroke:rgba(255,255,255,.12)}
.ba-rv{stroke:var(--ac);stroke-linecap:round;stroke-dasharray:326.7px;stroke-dashoffset:calc(326.7px * (1 - var(--sv,0)));transition:stroke-dashoffset .8s cubic-bezier(.16,1,.3,1),stroke .4s}
.ba-res[data-lv="3"] .ba-rv{stroke:#fff}
.ba-rn{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ba-rn b{font-size:26px;line-height:1;color:#fff}
.ba-rn small{font:600 12px/1 var(--fb);color:var(--mut)}
.ba-rx{min-width:0}
.ba-rk{display:block;font:600 12px/1.2 var(--fb);letter-spacing:.1em;text-transform:uppercase;color:var(--mut)}
.sk-ba .ba-stamp{display:inline-block;margin:6px 0 0;padding:5px 10px 4px;border:2px solid var(--ac);border-radius:4px;font:800 13px/1.15 var(--fb);letter-spacing:.14em;color:var(--ac);transform:rotate(-3deg);transform-origin:0 50%}
.ba-res[data-lv="0"] .ba-stamp{border-style:dashed;border-color:#7a7a85;color:#a3a3ad}
.ba-res[data-lv="2"] .ba-stamp{background:var(--ac);color:#0a0a0c}
.ba-res[data-lv="3"] .ba-stamp{border-color:#fff;background:#fff;color:#0a0a0c}
.sk-ba .ba-vd{margin:6px 0 0;font:500 14px/1.4 var(--fb);color:var(--tx)}
.ba-vs{display:block}
.ba-vl{display:none}

/* =====================  04 · BÀI VIẾT  ===================== */
.sk-ba .ba-posts{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;margin-inline:calc(var(--gut)*-1);padding:6px var(--gut) 18px;scroll-padding-inline:var(--gut);scrollbar-width:none;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;perspective:none}
.ba-posts::-webkit-scrollbar{display:none}
.sk-ba .ba-posts>.card{flex:0 0 min(80%,330px);scroll-snap-align:start;min-width:0}
.sk-ba .ba-posts .card-body em{font-size:12px}

/* =====================  05 · KHÔNG NÊN GIAO CHO AI  ===================== */
.sk-ba .ba-nos{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;margin-inline:calc(var(--gut)*-1);padding:6px var(--gut) 16px;scroll-padding-inline:var(--gut);scrollbar-width:none;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch}
.ba-nos::-webkit-scrollbar{display:none}
.ba-no{position:relative;display:block;flex:0 0 min(80%,320px);scroll-snap-align:start;min-width:0;overflow:hidden;border:1px solid var(--ln);border-radius:16px;background:var(--card)}
.ba-tape{position:relative;display:block;height:14px;overflow:hidden;border-bottom:1px solid var(--ln);background:#0a0a0c}
.ba-tape::before{content:"";position:absolute;top:0;bottom:0;left:-30px;right:-30px;background:repeating-linear-gradient(135deg,var(--ac) 0 10px,#0a0a0c 10px 20px)}
.ba-nb{min-width:0;padding:16px 16px 16px}
.ba-nh{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:8px}
.ba-nh .s-ico{position:relative;margin:0;overflow:visible}
.ba-nh .s-ico::after{content:"";position:absolute;left:-6px;right:-6px;top:50%;height:3px;margin-top:-1.5px;border-radius:2px;background:#fff;box-shadow:0 0 0 2px #131317;transform:rotate(-42deg);transition:transform .55s cubic-bezier(.16,1,.3,1) .45s}
.kx-js .ba-nos:not(.kx-in) .s-ico::after{transform:rotate(-42deg) scaleX(0)}
.ba-nn{font-size:42px;line-height:.9;color:rgba(255,255,255,.16)}
.sk-ba .ba-no h3{margin:0 0 8px;font-size:19px;line-height:1.25}
.sk-ba .ba-no p{font-size:15.5px;line-height:1.55;color:var(--mut)}
.sk-ba .ba-no .ba-alt{display:flex;align-items:flex-start;gap:10px;margin-top:12px;padding-top:12px;border-top:1px dashed var(--ln);font-size:15px;color:var(--tx)}
.ba-alt .ba-star{width:14px;height:14px;margin-top:4px;color:var(--ac)}
.sk-ba .ba-no .ba-alt a{color:var(--ac);text-decoration:underline;text-underline-offset:3px}

/* =====================  FAQ / RELATED / PAGER / CTA  ===================== */
.ba-fqw{max-width:900px}
.sk-ba .fq-q{padding:16px 0;font-size:clamp(16px,1.6vw,19px)}
.sk-ba .fq-a p{padding-bottom:18px}
.sk-ba .s-relw{padding-block:32px 8px}
.sk-ba .s-rel a{min-height:0;gap:8px;padding:16px 18px}
.sk-ba .s-pager{grid-template-columns:1fr 1fr;padding-block:16px 28px}
.sk-ba .s-pager a{padding:14px 16px}
.sk-ba .s-pager b{font-size:16px}
.sk-ba .s-cta{padding-block:44px}

/* =====================  CHUYỂN ĐỘNG  ===================== */
@media(prefers-reduced-motion:no-preference){
  .ba-cur{animation:baBlink 1.05s steps(1) infinite}
  .ba-sp{animation:baTw 3.6s ease-in-out infinite alternate}
  .ba-sp2{animation-duration:4.8s;animation-delay:-1.2s}
  .ba-sp3{animation-duration:5.6s;animation-delay:-2.4s}
  .ba-spark{animation:baTw 2.4s ease-in-out infinite alternate}
  .ba-sc.is-think .ba-tk u{animation:baDot 1s ease-in-out infinite}
  .ba-sc.is-think .ba-tk u:nth-child(2){animation-delay:.15s}
  .ba-sc.is-think .ba-tk u:nth-child(3){animation-delay:.3s}
  .ba-blk.is-hit>div{animation:baHit 1.2s ease-out}
  .ba-fp.is-swap .ba-fl li{animation:baRise .55s cubic-bezier(.16,1,.3,1) both;animation-delay:calc(var(--i,0)*.07s)}
  .ba-fp.is-swap .ba-fh,.ba-fp.is-swap .ba-meter,.ba-fp.is-swap .ba-gate{animation:baFade .5s ease both}
  .ba-stamp.is-hit{animation:baStamp .6s cubic-bezier(.2,.9,.3,1.2) both}
  .kx-js .ba-nos.kx-in .ba-tape::before{animation:baTape 2.2s linear infinite}
}
@keyframes baBlink{50%{opacity:0}}
@keyframes baTw{from{transform:scale(.7) rotate(0);opacity:.55}to{transform:scale(1.15) rotate(40deg);opacity:1}}
@keyframes baDot{0%,100%{opacity:.25;transform:translateY(0)}50%{opacity:1;transform:translateY(-3px)}}
@keyframes baHit{0%{border-left-color:var(--ac);background:rgba(255,106,19,.14)}100%{border-left-color:transparent;background:rgba(255,106,19,0)}}
@keyframes baRise{from{opacity:0;transform:translateY(14px)}}
@keyframes baFade{from{opacity:0}}
@keyframes baStamp{0%{opacity:0;transform:scale(1.9) rotate(-14deg)}55%{opacity:1;transform:scale(.94) rotate(-3deg)}100%{opacity:1;transform:scale(1) rotate(-3deg)}}
@keyframes baTape{to{transform:translateX(28.28px)}}
@media(hover:hover) and (pointer:fine){
  .ba-it:hover{border-color:rgba(255,106,19,.6)}
  .ba-rs:hover,.ba-rep:hover{border-color:var(--ac);color:var(--ac)}
  .ba-nd:hover i{border-color:var(--ac)}
  .ba-no{transition:border-color .3s,transform .4s cubic-bezier(.16,1,.3,1)}
  .ba-no:hover{border-color:rgba(255,106,19,.55);transform:translateY(-4px)}
}

/* =====================  iPad / tablet (>=700)  ===================== */
@media(min-width:700px){
  .sk-ba .ba-btns .btn{flex:0 0 auto;padding-inline:26px}
  .sk-ba .ba-title{font-size:clamp(88px,12vw,124px)}
  .ba-sp1{top:150px}.ba-sp2{top:230px}.ba-sp3{top:300px}
  .ba-ctl{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}
  .ba-ctl>.ba-step,.ba-ctl>.ba-tasks,.ba-ctl>.s-sw{grid-column:1/-1}
  .ba-fl{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
  .sk-ba .ba-fl li{grid-template-columns:1fr;gap:10px}
  .ba-fp{min-height:0;padding:24px}
  .sk-ba .ba-cl{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ba-vs{display:none}
  .ba-vl{display:block}
  .sk-ba .ba-posts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;overflow:visible;margin-inline:0;padding-inline:0}
  .sk-ba .ba-posts>.card{flex:none}
  .sk-ba .ba-nos{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));overflow:visible;margin-inline:0;padding-inline:0}
  .ba-no{flex:none}
}
/* =====================  desktop (>=1025)  ===================== */
@media(min-width:1025px){
  .ba-hw{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:center;gap:clamp(36px,4vw,64px)}
  .sk-ba .ba-title{font-size:clamp(100px,9.4vw,146px)}
  .ba-sp1{left:44%;right:auto;top:150px}.ba-sp2{left:47%;right:auto;top:260px}.ba-sp3{left:42%;right:auto;top:auto;bottom:90px}
  .ba-scr{padding:20px 22px 8px}
  .ba-lab{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:start;gap:28px}
  .ba-ctl{grid-template-columns:1fr}
  .ba-ow{position:sticky;top:96px}
  .ba-pf .btn{display:inline-flex;flex:none}
  .ba-pb{padding:6px 22px 0}
  .ba-chk{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start;gap:32px}
  .sk-ba .ba-cl{grid-template-columns:1fr}
  .ba-res{position:sticky;top:100px;bottom:auto;grid-template-columns:1fr;justify-items:start;gap:18px;padding:28px;border-radius:20px;background:var(--card);-webkit-backdrop-filter:none;backdrop-filter:none}
  .ba-rgw{width:150px;height:150px}
  .ba-rn b{font-size:54px}
  .ba-rn small{font-size:13px}
  .sk-ba .ba-vd{font-size:15.5px}
  .ba-fp{padding:28px}
  .sk-ba .ba-nos{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
}
@media(min-width:1100px){
  .sk-ba .ba-posts{grid-template-columns:repeat(4,minmax(0,1fr))}
}