/* Công cụ miễn phí /cong-cu: khung dùng chung. Tiền tố tl-. CSS riêng từng công cụ đặt ở <slug>.css, tiền tố riêng. */
.tl-hero{padding:44px 0 34px;border-bottom:1px solid var(--line);background:radial-gradient(900px 340px at 8% -20%,var(--brand-soft),transparent 70%),radial-gradient(700px 300px at 100% 0,#eaf0ff,transparent 70%)}
.tl-hero .sx-crumb{margin-bottom:18px}
.tl-hero-row{display:flex;gap:20px;align-items:flex-start}
.tl-hero-ico{flex:none;width:58px;height:58px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);display:grid;place-items:center;color:var(--brand-2)}
.tl-hero-ico .ico{width:28px;height:28px}
.tl-hero h1{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.03em;margin:4px 0 10px}
.tl-hero .lead{font-size:17px;color:var(--muted);max-width:760px;margin:0}
.tl-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tl-badges .ico{width:14px;height:14px}
.tl-hero-hub{padding:64px 0 44px}
.tl-hero-hub h1{font-size:clamp(34px,5vw,56px);margin:14px 0}
.tl-hero-hub .lead{margin:0 auto;font-size:18.5px}
.tl-jump{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:26px}
.tl-jump a{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:99px;background:#fff;border:1px solid var(--line-2);text-decoration:none;font-weight:600;font-size:14.5px;color:var(--ink-2)}
.tl-jump a:hover{border-color:var(--ink)}
.tl-jump .ico{width:16px;height:16px;color:var(--brand-2)}
.tl-jump small{color:var(--faint);font-weight:600}

/* vùng công cụ */
.tl-app{padding:32px 0 48px}
.tl-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:24px}
.tl-panel+.tl-panel{margin-top:20px}
.tl-cols>.tl-panel+.tl-panel{margin-top:0}
.tl-panel h2,.tl-panel h3{font-size:18px;margin:0 0 14px;letter-spacing:-.015em}
.tl-cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}
.tl-cols-wide{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr)}
.tl-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr));gap:14px}
.tl-row .field{justify-content:flex-end}
.tl-row+.tl-row,.tl-row+.field,.field+.tl-row,.field+.field{margin-top:14px}
.tl-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;align-items:center}
.tl-actions .btn .ico{width:17px;height:17px}
.tl-check{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;cursor:pointer}
.tl-checks{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr));gap:8px 16px}
.tl-hint{font-size:13px;color:var(--faint);margin:6px 0 0}
.tl-out{position:relative;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font:13.5px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;word-break:break-word;min-height:120px;max-height:520px;overflow:auto;color:var(--ink-2)}
textarea.tl-out{width:100%;resize:vertical}
.tl-copy{position:absolute;top:8px;right:8px}
.tl-urlbar{display:flex;gap:10px}
.tl-urlbar input{flex:1;min-width:0;height:52px;font-size:16.5px;padding:0 16px}
.tl-urlbar .btn{height:52px;padding:0 22px;flex:none}
.tl-tabs{display:flex;gap:4px;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:4px;margin-bottom:18px;overflow-x:auto;scrollbar-width:none}
.tl-tabs button{flex:1;white-space:nowrap;border:0;background:none;font:600 14px/1 inherit;font-family:inherit;padding:10px 14px;border-radius:9px;cursor:pointer;color:var(--muted)}
.tl-tabs button[aria-selected=true]{background:#fff;color:var(--ink);box-shadow:var(--sh-1)}
.tl-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,130px),1fr));gap:10px}
.tl-stat{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.tl-stat b{display:block;font-size:24px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.tl-stat span{font-size:12.5px;color:var(--muted)}
.tl-table{width:100%;border-collapse:collapse;font-size:14.5px}
.tl-table th,.tl-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.tl-table th{font-size:12.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--faint);font-weight:700}
.tl-table td.num,.tl-table th.num{text-align:right;font-variant-numeric:tabular-nums}
.tl-scroll{overflow-x:auto}
.tl-status{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;border-radius:99px;padding:3px 10px}
.tl-ok{background:var(--ok-soft);color:var(--ok)}.tl-warn{background:#fff4e0;color:#9a3412}.tl-bad{background:var(--bad-soft);color:var(--bad-red)}.tl-info{background:var(--info-soft);color:var(--info)}
.tl-empty{color:var(--faint);text-align:center;padding:30px 10px;font-size:14.5px}
.tl-loading{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14.5px;padding:18px 0}
.tl-loading::before{content:"";width:18px;height:18px;border-radius:50%;border:2.5px solid var(--line-2);border-top-color:var(--brand-2);animation:tlspin .8s linear infinite}
@keyframes tlspin{to{transform:rotate(360deg)}}
.tl-err{background:var(--bad-soft);color:var(--bad-red);border-radius:12px;padding:12px 14px;font-size:14.5px}
.tl-note{font-size:13.5px;color:var(--muted);background:var(--bg-2);border-radius:10px;padding:10px 12px;margin-top:14px}
.tl-toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;font-size:14px;font-weight:600;opacity:0;transition:.2s;z-index:90;pointer-events:none}
.tl-toast.on{opacity:1;transform:translate(-50%,0)}

/* CTA sang sản phẩm/dịch vụ */
.tl-cta-wrap{padding:0 0 8px}
.tl-cta{display:flex;align-items:center;gap:16px;padding:18px 20px;border-radius:16px;text-decoration:none;color:var(--ink);background:linear-gradient(100deg,#fff7e6,#fff3d6 55%,#ffeccb);border:1px solid #f6d58f;transition:box-shadow .2s,transform .2s}
.tl-cta:hover{box-shadow:var(--sh-2);transform:translateY(-1px)}
.tl-cta-ico{flex:none;width:46px;height:46px;border-radius:12px;background:#fff;display:grid;place-items:center;color:var(--brand-2)}
.tl-cta-txt{flex:1;display:flex;flex-direction:column;gap:2px}
.tl-cta-txt b{font-size:16.5px}.tl-cta-txt span{font-size:14.5px;color:var(--muted)}
.tl-cta .btn{flex:none}

/* bài hướng dẫn */
.tl-guide h2{font-size:26px;margin:0 0 .6em;letter-spacing:-.02em}
.tl-guide h2+p{margin-top:0}
.tl-guide h3{font-size:19px}
.tl-guide ul,.tl-guide ol{padding-left:1.25em;color:var(--ink-2);margin:0 0 1.1em}
.tl-guide li{margin:.3em 0}
.tl-guide code{background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:.92em}

/* thẻ công cụ (trang tổng + liên quan) */
.tl-grid{display:grid;gap:16px}
.tl-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.tl-grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.tl-hero-hub{text-align:center}
.tl-card{display:flex;align-items:flex-start;gap:14px;padding:18px;border-radius:16px;background:#fff;border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--sh-1);transition:box-shadow .2s,transform .2s,border-color .2s;height:100%}
.tl-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-2)}
.tl-card-ico{flex:none;width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand-2);display:grid;place-items:center}
.tl-card-b{flex:1;display:flex;flex-direction:column;gap:4px;min-width:0}
.tl-card-b b{font-size:16px;letter-spacing:-.01em}
.tl-card-b span{font-size:14px;color:var(--muted);line-height:1.45}
.tl-card>.ico{flex:none;width:18px;height:18px;color:var(--faint);margin-top:3px;transition:transform .2s,color .2s}
.tl-card:hover>.ico{transform:translateX(3px);color:var(--brand-2)}

@media (max-width:1100px){.tl-grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:980px){.tl-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.tl-cols,.tl-cols-wide{grid-template-columns:minmax(0,1fr)}}
@media (max-width:640px){
  .tl-grid-3,.tl-grid-4{grid-template-columns:1fr}
  .tl-hero{padding:30px 0 24px}.tl-hero-row{gap:14px}.tl-hero-ico{width:46px;height:46px;border-radius:12px}.tl-hero-ico .ico{width:22px;height:22px}
  .tl-panel{padding:18px}
  .tl-urlbar{flex-direction:column}.tl-urlbar .btn{width:100%}
  .tl-cta{flex-wrap:wrap}.tl-cta .btn{width:100%}
}
@media print{.mnav,.mfoot,.tl-hero,.tl-cta-wrap,.tl-guide,.sec,.tl-noprint{display:none!important}.tl-app{padding:0}.tl-panel{box-shadow:none;border:0;padding:0}}

/* ---- trang tổng /cong-cu (ch-) ---- */
.ch-hero{padding:56px 0 40px;background:radial-gradient(900px 360px at 10% -30%,var(--brand-soft),transparent 70%),radial-gradient(760px 320px at 100% -10%,#eaf0ff,transparent 70%)}
.ch-hero-in{max-width:760px;margin:0 auto;text-align:center}
.ch-hero h1{font-size:clamp(32px,4.6vw,52px);line-height:1.08;letter-spacing:-.035em;margin:14px 0 14px}
.ch-hero .lead{font-size:18px;color:var(--muted);margin:0 auto;max-width:620px}
.ch-search{display:flex;align-items:center;gap:12px;max-width:620px;margin:28px auto 0;background:#fff;border:1px solid var(--line-2);border-radius:16px;padding:0 14px 0 18px;height:60px;box-shadow:var(--sh-2);cursor:text}
.ch-search:focus-within{border-color:var(--brand-2);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 22%,transparent),var(--sh-2)}
.ch-search>.ico{width:20px;height:20px;color:var(--faint);flex:none}
.ch-search input{flex:1;min-width:0;border:0;outline:0;background:none;font:inherit;font-size:16.5px;height:100%;padding:0;box-shadow:none}
.ch-search kbd{flex:none;font:600 12px/1 ui-monospace,monospace;color:var(--faint);border:1px solid var(--line-2);border-radius:6px;padding:4px 7px}
.ch-facts{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-wrap:wrap;justify-content:center;gap:8px 22px;font-size:14px;color:var(--muted)}
.ch-facts li{display:inline-flex;align-items:center;gap:7px}.ch-facts .ico{width:16px;height:16px;color:var(--ok)}
.ch-feat-wrap{padding:8px 0 0}
.ch-feat{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:16px}
.ch-fcard{position:relative;display:flex;flex-direction:column;gap:6px;padding:22px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);text-decoration:none;color:var(--ink);transition:box-shadow .2s,transform .2s;overflow:hidden}
.ch-fcard:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.ch-fcard.is-main{background:linear-gradient(135deg,#fff7e6,#ffeccb 60%,#ffe2b8);border-color:#f6d58f}
.ch-fcard-ico{width:48px;height:48px;border-radius:14px;background:var(--brand-soft);color:var(--brand-2);display:grid;place-items:center;margin-bottom:8px}
.is-main .ch-fcard-ico{background:#fff}
.ch-fcard-ico .ico{width:24px;height:24px}
.ch-fcard-k{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand-ink)}
.ch-fcard b{font-size:20px;letter-spacing:-.02em;line-height:1.25}
.ch-fcard-d{font-size:14.5px;color:var(--muted);line-height:1.5;flex:1}
.ch-fcard-go{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:14.5px;margin-top:10px;color:var(--ink)}
.ch-fcard-go .ico{width:16px;height:16px;transition:transform .2s}.ch-fcard:hover .ch-fcard-go .ico{transform:translateX(3px)}
.ch-main{padding:44px 0 72px}
.ch-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}
.ch-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:18px}
.ch-side-h{margin:0;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--faint)}
.ch-cats{display:flex;flex-direction:column;gap:2px}
.ch-cats a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;text-decoration:none;color:var(--ink-2);font-weight:600;font-size:15px}
.ch-cats a .ico{width:17px;height:17px;color:var(--faint)}
.ch-cats a small{margin-left:auto;font-size:12.5px;color:var(--faint);font-weight:600}
.ch-cats a:hover{background:var(--bg-2)}
.ch-cats a.on{background:var(--ink);color:#fff}.ch-cats a.on .ico,.ch-cats a.on small{color:#fff}
.ch-side-cta{background:var(--bg-2);border:1px solid var(--line);border-radius:16px;padding:16px}
.ch-side-cta b{display:block;font-size:15.5px;margin-bottom:4px}.ch-side-cta p{font-size:13.5px;color:var(--muted);margin:0 0 12px;line-height:1.5}
.ch-list{display:flex;flex-direction:column;gap:44px;scroll-margin-top:90px}
.ch-group{scroll-margin-top:90px}
.ch-group-h{display:flex;gap:14px;align-items:flex-start;margin:0 0 18px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.ch-group-ico{flex:none;width:40px;height:40px;border-radius:12px;background:var(--ink);color:#fff;display:grid;place-items:center}
.ch-group-ico .ico{width:19px;height:19px}
.ch-group-h h2{font-size:24px;letter-spacing:-.02em;margin:0 0 2px;line-height:1.3}
.ch-group-h h2 small{font-size:14px;color:var(--faint);font-weight:600;margin-left:4px}
.ch-group-h p{margin:0;color:var(--muted);font-size:15px}
.ch-none{text-align:center;padding:48px 16px;border:1px dashed var(--line-2);border-radius:16px;color:var(--muted)}
.ch-none .ico{width:28px;height:28px;color:var(--faint)}.ch-none b{display:block;color:var(--ink);font-size:17px;margin:8px 0 4px}.ch-none p{margin:0}
.ch-band{padding:0 0 80px}
.ch-band-in{display:flex;align-items:center;justify-content:space-between;gap:32px;background:var(--ink);color:#fff;border-radius:24px;padding:36px 40px}
.ch-band-in .eyebrow{color:#fbbf24}.ch-band-in h2{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.02em;margin:10px 0 8px;color:#fff}
.ch-band-in p{margin:0;color:rgba(255,255,255,.72);max-width:560px}
.ch-band-btns{display:flex;gap:10px;flex:none}.ch-band-btns .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.3)}
/* thẻ công cụ mới: icon trên, tag dưới */
.tl-card{flex-direction:column;gap:12px}
.tl-card-top{display:flex;justify-content:space-between;align-items:center;width:100%}
.tl-card-top>.ico{width:18px;height:18px;color:var(--faint);transition:transform .2s,color .2s}
.tl-card:hover .tl-card-top>.ico{transform:translateX(3px);color:var(--brand-2)}
.tl-card-ico{width:42px;height:42px}
.tl-card-b{gap:5px}
.tl-card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.tl-card-tags i{font-style:normal;font-size:12px;font-weight:600;color:var(--muted);background:var(--bg-2);border:1px solid var(--line);border-radius:99px;padding:2px 9px}
.tl-card[hidden],.ch-group[hidden]{display:none}

/* ---- trang từng công cụ: phần dưới có thanh bên (tp-) ---- */
.tl-app{padding:28px 0 40px}
.tp-more{padding:24px 0 64px;border-top:1px solid var(--line);background:var(--bg-2)}
.tp-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.tp-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:36px 40px;margin-top:16px}
.tp-body .tl-guide{max-width:none}
.tp-faq{margin-top:36px;padding-top:30px;border-top:1px solid var(--line)}
.tp-body>.tp-faq:first-child{margin-top:0;padding-top:0;border:0}
.tp-faq h2{font-size:24px;letter-spacing:-.02em;margin:0 0 8px}
.tp-faq .faq summary{font-size:16px;padding:15px 0}.tp-faq .faq p{font-size:15.5px}
.tp-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:16px;margin-top:16px}
.tp-cta{display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:18px;text-decoration:none;color:var(--ink);background:linear-gradient(140deg,#fff7e6,#ffeccb);border:1px solid #f6d58f;transition:box-shadow .2s}
.tp-cta:hover{box-shadow:var(--sh-2)}
.tp-cta .tl-cta-ico{margin-bottom:6px}
.tp-cta b{font-size:16.5px;line-height:1.35}.tp-cta>span:not(.btn):not(.tl-cta-ico){font-size:14px;color:var(--muted);line-height:1.5;margin-bottom:8px}
.tp-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
.tp-box-h{display:flex;align-items:center;gap:8px;margin:0 0 8px;font-size:12.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--faint)}
.tp-box-h .ico{width:15px;height:15px}.tp-box-h2{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.tp-links{display:flex;flex-direction:column;gap:1px}
.tp-links a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;text-decoration:none;color:var(--ink-2);font-size:14.5px;font-weight:500;line-height:1.35}
.tp-links a .ico{flex:none;width:16px;height:16px;color:var(--faint)}
.tp-links a:hover{background:var(--bg-2)}
.tp-links a.on{background:var(--brand-soft);color:var(--brand-ink);font-weight:700}.tp-links a.on .ico{color:var(--brand-2)}
.tp-links a.tp-all{color:var(--brand-ink);font-weight:600}
.tp-rel{padding:56px 0 72px}
.tp-rel-h{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px}
.tp-rel-h h2{font-size:26px;letter-spacing:-.02em;margin:0}
.tp-rel-h a{display:inline-flex;align-items:center;gap:6px;font-weight:600;text-decoration:none;color:var(--brand-ink);font-size:15px}.tp-rel-h a .ico{width:16px;height:16px}

@media (max-width:1100px){.ch-layout{grid-template-columns:200px minmax(0,1fr);gap:28px}.ch-layout .tl-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.tp-layout{grid-template-columns:minmax(0,1fr) 280px;gap:28px}}
@media (max-width:900px){
  .ch-feat{grid-template-columns:1fr 1fr}.ch-fcard.is-main{grid-column:1/-1}
  .ch-layout{grid-template-columns:minmax(0,1fr)}
  .ch-side{position:sticky;top:64px;z-index:5;margin:0 -20px;padding:10px 20px;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .ch-side-h,.ch-side-cta{display:none}
  .ch-cats{flex-direction:row;overflow-x:auto;scrollbar-width:none;gap:6px}.ch-cats::-webkit-scrollbar{display:none}
  .ch-cats a{flex:none;padding:8px 14px;border:1px solid var(--line-2);border-radius:99px;background:#fff;font-size:14px}
  .ch-cats a small{margin-left:2px}
  .ch-band-in{flex-direction:column;align-items:flex-start;padding:28px}
  .tp-layout{grid-template-columns:minmax(0,1fr)}.tp-side{position:static;margin-top:0}
}
@media (max-width:640px){
  .ch-hero{padding:36px 0 28px}.ch-search{height:54px}.ch-search kbd{display:none}
  .ch-feat{grid-template-columns:1fr}
  .ch-layout .tl-grid-3{grid-template-columns:1fr}
  .ch-main{padding:28px 0 56px}.ch-list{gap:36px}
  .ch-band-btns{flex-direction:column;width:100%}.ch-band-btns .btn{width:100%}
  .tp-body{padding:22px 18px;margin-left:-4px;margin-right:-4px}
  .tp-rel{padding:40px 0 56px}
}
@media print{.tp-more,.tp-rel{display:none!important}}

/* Chống tràn ngang trên điện thoại */
.tl-stats>*{min-width:0}
.tl-stat b{overflow-wrap:anywhere;word-break:break-word}
.tl-stat span{overflow-wrap:anywhere}
.tp-faq .faq summary .ico{flex:none;margin-right:4px}
@media(max-width:480px){.tl-stat b{font-size:clamp(16px,6vw,24px)}}

/* Ảnh minh hoạ và bảng trong phần hướng dẫn của trang công cụ (2026-10-15) */
.tl-guide .shot{margin:18px 0 24px}
.tl-guide .shot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 8px 24px -16px rgba(10,15,28,.35)}
.tl-guide .shot figcaption{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.5}
.tl-guide table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0 20px;display:block;overflow-x:auto}
.tl-guide th,.tl-guide td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.tl-guide th{background:var(--bg-2)}
.tl-guide .tl-more{display:grid;gap:8px;padding-left:20px}